src/PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5
   6 use Digest::SHA;
   7 use Encode;
   8 use File::Basename;
   9 use File::Path;
  10 use IO::File;
  11 use Net::IP;
  12 use POSIX;
  13 use Socket qw(AF_INET AF_INET6 inet_ntop inet_pton);
  14 use Storable qw(dclone);
  15
  16 use PVE::Cluster;
  17 use PVE::Corosync;
  18 use PVE::Exception qw(raise raise_param_exc);
  19 use PVE::INotify;
  20 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  21 use PVE::Network;
  22 use PVE::ProcFSTools;
  23 use PVE::SafeSyslog;
  24 use PVE::Tools qw($IPV4RE $IPV6RE);
  25 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  26
  27 use PVE::Firewall::Helpers;
  28
  29 my $pvefw_conf_dir = "/etc/pve/firewall";
  30 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
  31
  32 # dynamically include PVE::QemuServer and PVE::LXC
  33 # to avoid dependency problems
  34 my $have_qemu_server;
  35 eval {
  36     require PVE::QemuServer;
  37     require PVE::QemuConfig;
  38     $have_qemu_server = 1;
  39 };
  40
  41 my $have_lxc;
  42 eval {
  43     require PVE::LXC;
  44     $have_lxc = 1;
  45 };
  46
  47 my $pve_fw_status_dir = "/var/lib/pve-firewall";
  48
  49 mkdir $pve_fw_status_dir; # make sure this exists
  50
  51 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  52 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  53 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  54
  55 my $max_alias_name_length = 64;
  56 my $max_ipset_name_length = 64;
  57 my $max_group_name_length = 18;
  58
  59 my $PROTOCOLS_WITH_PORTS = {
  60     udp => 1,     17 => 1,
  61     udplite => 1, 136 => 1,
  62     tcp => 1,     6 => 1,
  63     dccp => 1,    33 => 1,
  64     sctp => 1,    132 => 1,
  65 };
  66
  67 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
  68 sub pve_verify_ip_or_cidr {
  69     my ($cidr, $noerr) = @_;
  70
  71     if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(?:/\d+)?$!) {
  72         # Net::IP throws an error if the masked CIDR part isn't zero, e.g., `192.168.1.155/24`
  73         # fails but `192.168.1.0/24` succeeds. clean_cidr removes the non zero bits from the CIDR.
  74         my $clean_cidr = clean_cidr($cidr);
  75         return $cidr if Net::IP->new($clean_cidr);
  76         return undef if $noerr;
  77
  78         die Net::IP::Error() . "\n";
  79     }
  80     return undef if $noerr;
  81     die "value does not look like a valid IP address or CIDR network\n";
  82 }
  83
  84 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
  85 sub pve_verify_ip_or_cidr_or_alias {
  86     my ($cidr, $noerr) = @_;
  87
  88     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  89
  90     return pve_verify_ip_or_cidr($cidr, $noerr);
  91 }
  92
  93 sub clean_cidr {
  94     my ($cidr) = @_;
  95     my ($ip, $len) = split('/', $cidr);
  96     return $cidr if !$len;
  97     my $ver = ($ip =~ m!^$IPV4RE$!) ? 4 : 6;
  98
  99     my $bin_ip = Net::IP::ip_iptobin( Net::IP::ip_expand_address($ip, $ver), $ver);
 100     my $bin_mask = Net::IP::ip_get_mask($len, $ver);
 101     my $clean_ip = Net::IP::ip_compress_address( Net::IP::ip_bintoip($bin_ip & $bin_mask, $ver), $ver);
 102
 103     return "${clean_ip}/$len";
 104 }
 105
 106 PVE::JSONSchema::register_standard_option('ipset-name', {
 107     description => "IP set name.",
 108     type => 'string',
 109     pattern => $ipset_name_pattern,
 110     minLength => 2,
 111     maxLength => $max_ipset_name_length,
 112 });
 113
 114 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
 115     description => "Alias name.",
 116     type => 'string',
 117     pattern => $ip_alias_pattern,
 118     minLength => 2,
 119     maxLength => $max_alias_name_length,
 120 });
 121
 122 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
 123     description => "Log level.",
 124     type => 'string',
 125     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
 126     optional => 1,
 127 });
 128
 129 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
 130     description => "Security Group name.",
 131     type => 'string',
 132     pattern => $security_group_name_pattern,
 133     minLength => 2,
 134     maxLength => $max_group_name_length,
 135 });
 136
 137 my $feature_ipset_nomatch = 0;
 138 eval  {
 139     my (undef, undef, $release) = POSIX::uname();
 140     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 141         my ($major, $minor) = ($1, $2);
 142         $feature_ipset_nomatch = 1 if ($major > 3) ||
 143             ($major == 3 && $minor >= 7);
 144     }
 145
 146 };
 147
 148 my $nodename = PVE::INotify::nodename();
 149 my $hostfw_conf_filename = "/etc/pve/nodes/$nodename/host.fw";
 150
 151 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 152
 153 my $default_log_level = 'nolog'; # avoid logs by default
 154 my $global_log_ratelimit = '--limit 1/sec';
 155
 156 my $log_level_hash = {
 157     debug => 7,
 158     info => 6,
 159     notice => 5,
 160     warning => 4,
 161     err => 3,
 162     crit => 2,
 163     alert => 1,
 164     emerg => 0,
 165 };
 166
 167 my $verbose = 0;
 168 sub set_verbose {
 169     $verbose = shift;
 170 }
 171
 172 # %rule
 173 #
 174 # name => optional
 175 # enable => [0|1]
 176 # action =>
 177 # proto =>
 178 # sport => port[,port[,port]].. or port:port
 179 # dport => port[,port[,port]].. or port:port
 180 # log => optional, loglevel
 181 # logmsg => optional, logmsg - overwrites default
 182 # iface_in => incomin interface
 183 # iface_out => outgoing interface
 184 # match => optional, overwrites generation of match
 185 # target => optional, overwrites action
 186
 187 # we need to overwrite some macros for ipv6
 188 my $pve_ipv6fw_macros = {
 189     'Ping' => [
 190         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 191     ],
 192     'NeighborDiscovery' => [
 193         "IPv6 neighbor solicitation, neighbor and router advertisement",
 194         { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
 195         { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
 196         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
 197         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
 198     ],
 199     'DHCPv6' => [
 200         "DHCPv6 traffic",
 201         { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
 202     ],
 203     'Trcrt' => [
 204         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 205         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 206     ],
 207  };
 208
 209 # imported/converted from: /usr/share/shorewall/macro.*
 210 my $pve_fw_macros = {
 211     'Amanda' => [
 212         "Amanda Backup",
 213         { action => 'PARAM', proto => 'udp', dport => '10080' },
 214         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 215     ],
 216     'Auth' => [
 217         "Auth (identd) traffic",
 218         { action => 'PARAM', proto => 'tcp', dport => '113' },
 219     ],
 220     'BGP' => [
 221         "Border Gateway Protocol traffic",
 222         { action => 'PARAM', proto => 'tcp', dport => '179' },
 223     ],
 224     'BitTorrent' => [
 225         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 226         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 227         { action => 'PARAM', proto => 'udp', dport => '6881' },
 228     ],
 229     'BitTorrent32' => [
 230         "BitTorrent traffic for BitTorrent 3.2 and later",
 231         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 232         { action => 'PARAM', proto => 'udp', dport => '6881' },
 233     ],
 234     'Ceph' => [
 235         "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Daemons)",
 236         # Legacy port for protocol v1
 237         { action => 'PARAM', proto => 'tcp', dport => '6789' },
 238         # New port for protocol v2
 239         { action => 'PARAM', proto => 'tcp', dport => '3300' },
 240         { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
 241     ],
 242     'CVS' => [
 243         "Concurrent Versions System pserver traffic",
 244         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 245     ],
 246     'Citrix' => [
 247         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 248         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 249         { action => 'PARAM', proto => 'udp', dport => '1604' },
 250         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 251     ],
 252     'DAAP' => [
 253         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 254         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 255         { action => 'PARAM', proto => 'udp', dport => '3689' },
 256     ],
 257     'DCC' => [
 258         "Distributed Checksum Clearinghouse spam filtering mechanism",
 259         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 260     ],
 261     'DHCPfwd' => [
 262         "Forwarded DHCP traffic",
 263         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 264     ],
 265     'DNS' => [
 266         "Domain Name System traffic (upd and tcp)",
 267         { action => 'PARAM', proto => 'udp', dport => '53' },
 268         { action => 'PARAM', proto => 'tcp', dport => '53' },
 269     ],
 270     'Distcc' => [
 271         "Distributed Compiler service",
 272         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 273     ],
 274     'FTP' => [
 275         "File Transfer Protocol",
 276         { action => 'PARAM', proto => 'tcp', dport => '21' },
 277     ],
 278     'Finger' => [
 279         "Finger protocol (RFC 742)",
 280         { action => 'PARAM', proto => 'tcp', dport => '79' },
 281     ],
 282     'GNUnet' => [
 283         "GNUnet secure peer-to-peer networking traffic",
 284         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 285         { action => 'PARAM', proto => 'udp', dport => '2086' },
 286         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 287         { action => 'PARAM', proto => 'udp', dport => '1080' },
 288     ],
 289     'GRE' => [
 290         "Generic Routing Encapsulation tunneling protocol",
 291         { action => 'PARAM', proto => '47' },
 292     ],
 293     'Git' => [
 294         "Git distributed revision control traffic",
 295         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 296     ],
 297     'HKP' => [
 298         "OpenPGP HTTP key server protocol traffic",
 299         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 300     ],
 301     'HTTP' => [
 302         "Hypertext Transfer Protocol (WWW)",
 303         { action => 'PARAM', proto => 'tcp', dport => '80' },
 304     ],
 305     'HTTPS' => [
 306         "Hypertext Transfer Protocol (WWW) over SSL",
 307         { action => 'PARAM', proto => 'tcp', dport => '443' },
 308     ],
 309     'ICPV2' => [
 310         "Internet Cache Protocol V2 (Squid) traffic",
 311         { action => 'PARAM', proto => 'udp', dport => '3130' },
 312     ],
 313     'ICQ' => [
 314         "AOL Instant Messenger traffic",
 315         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 316     ],
 317     'IMAP' => [
 318         "Internet Message Access Protocol",
 319         { action => 'PARAM', proto => 'tcp', dport => '143' },
 320     ],
 321     'IMAPS' => [
 322         "Internet Message Access Protocol over SSL",
 323         { action => 'PARAM', proto => 'tcp', dport => '993' },
 324     ],
 325     'IPIP' => [
 326         "IPIP capsulation traffic",
 327         { action => 'PARAM', proto => '94' },
 328     ],
 329     'IPsec' => [
 330         "IPsec traffic",
 331         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 332         { action => 'PARAM', proto => '50' },
 333     ],
 334     'IPsecah' => [
 335         "IPsec authentication (AH) traffic",
 336         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 337         { action => 'PARAM', proto => '51' },
 338     ],
 339     'IPsecnat' => [
 340         "IPsec traffic and Nat-Traversal",
 341         { action => 'PARAM', proto => 'udp', dport => '500' },
 342         { action => 'PARAM', proto => 'udp', dport => '4500' },
 343         { action => 'PARAM', proto => '50' },
 344     ],
 345     'IRC' => [
 346         "Internet Relay Chat traffic",
 347         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 348     ],
 349     'Jetdirect' => [
 350         "HP Jetdirect printing",
 351         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 352     ],
 353     'L2TP' => [
 354         "Layer 2 Tunneling Protocol traffic",
 355         { action => 'PARAM', proto => 'udp', dport => '1701' },
 356     ],
 357     'LDAP' => [
 358         "Lightweight Directory Access Protocol traffic",
 359         { action => 'PARAM', proto => 'tcp', dport => '389' },
 360     ],
 361     'LDAPS' => [
 362         "Secure Lightweight Directory Access Protocol traffic",
 363         { action => 'PARAM', proto => 'tcp', dport => '636' },
 364     ],
 365     'MSNP' => [
 366         "Microsoft Notification Protocol",
 367         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 368     ],
 369     'MSSQL' => [
 370         "Microsoft SQL Server",
 371         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 372     ],
 373     'Mail' => [
 374         "Mail traffic (SMTP, SMTPS, Submission)",
 375         { action => 'PARAM', proto => 'tcp', dport => '25' },
 376         { action => 'PARAM', proto => 'tcp', dport => '465' },
 377         { action => 'PARAM', proto => 'tcp', dport => '587' },
 378     ],
 379     'MDNS' => [
 380         "Multicast DNS",
 381         { action => 'PARAM', proto => 'udp', dport => '5353' },
 382     ],
 383     'Munin' => [
 384         "Munin networked resource monitoring traffic",
 385         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 386     ],
 387     'MySQL' => [
 388         "MySQL server",
 389         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 390     ],
 391     'NNTP' => [
 392         "NNTP traffic (Usenet).",
 393         { action => 'PARAM', proto => 'tcp', dport => '119' },
 394     ],
 395     'NNTPS' => [
 396         "Encrypted NNTP traffic (Usenet)",
 397         { action => 'PARAM', proto => 'tcp', dport => '563' },
 398     ],
 399     'NTP' => [
 400         "Network Time Protocol (ntpd)",
 401         { action => 'PARAM', proto => 'udp', dport => '123' },
 402     ],
 403     'OSPF' => [
 404         "OSPF multicast traffic",
 405         { action => 'PARAM', proto => '89' },
 406     ],
 407     'OpenVPN' => [
 408         "OpenVPN traffic",
 409         { action => 'PARAM', proto => 'udp', dport => '1194' },
 410     ],
 411     'PCA' => [
 412         "Symantec PCAnywere (tm)",
 413         { action => 'PARAM', proto => 'udp', dport => '5632' },
 414         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 415     ],
 416     'PMG' => [
 417         "Proxmox Mail Gateway web interface",
 418         { action => 'PARAM', proto => 'tcp', dport => '8006' },
 419     ],
 420     'POP3' => [
 421         "POP3 traffic",
 422         { action => 'PARAM', proto => 'tcp', dport => '110' },
 423     ],
 424     'POP3S' => [
 425         "Encrypted POP3 traffic",
 426         { action => 'PARAM', proto => 'tcp', dport => '995' },
 427     ],
 428     'PPtP' => [
 429         "Point-to-Point Tunneling Protocol",
 430         { action => 'PARAM', proto => '47' },
 431         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 432     ],
 433     'Ping' => [
 434         "ICMP echo request",
 435         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 436     ],
 437     'PostgreSQL' => [
 438         "PostgreSQL server",
 439         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 440     ],
 441     'Printer' => [
 442         "Line Printer protocol printing",
 443         { action => 'PARAM', proto => 'tcp', dport => '515' },
 444     ],
 445     'RDP' => [
 446         "Microsoft Remote Desktop Protocol traffic",
 447         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 448     ],
 449     'RIP' => [
 450         "Routing Information Protocol (bidirectional)",
 451         { action => 'PARAM', proto => 'udp', dport => '520' },
 452     ],
 453     'RNDC' => [
 454         "BIND remote management protocol",
 455         { action => 'PARAM', proto => 'tcp', dport => '953' },
 456     ],
 457     'Razor' => [
 458         "Razor Antispam System",
 459         { action => 'PARAM', proto => 'tcp', dport => '2703' },
 460     ],
 461     'Rdate' => [
 462         "Remote time retrieval (rdate)",
 463         { action => 'PARAM', proto => 'tcp', dport => '37' },
 464     ],
 465     'Rsync' => [
 466         "Rsync server",
 467         { action => 'PARAM', proto => 'tcp', dport => '873' },
 468     ],
 469     'SANE' => [
 470         "SANE network scanning",
 471         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 472     ],
 473     'SMB' => [
 474         "Microsoft SMB traffic",
 475         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 476         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 477         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 478         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 479     ],
 480     'SMBswat' => [
 481         "Samba Web Administration Tool",
 482         { action => 'PARAM', proto => 'tcp', dport => '901' },
 483     ],
 484     'SMTP' => [
 485         "Simple Mail Transfer Protocol",
 486         { action => 'PARAM', proto => 'tcp', dport => '25' },
 487     ],
 488     'SMTPS' => [
 489         "Encrypted Simple Mail Transfer Protocol",
 490         { action => 'PARAM', proto => 'tcp', dport => '465' },
 491     ],
 492     'SNMP' => [
 493         "Simple Network Management Protocol",
 494         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 495         { action => 'PARAM', proto => 'tcp', dport => '161' },
 496     ],
 497     'SPAMD' => [
 498         "Spam Assassin SPAMD traffic",
 499         { action => 'PARAM', proto => 'tcp', dport => '783' },
 500     ],
 501     'SSH' => [
 502         "Secure shell traffic",
 503         { action => 'PARAM', proto => 'tcp', dport => '22' },
 504     ],
 505     'SVN' => [
 506         "Subversion server (svnserve)",
 507         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 508     ],
 509     'SixXS' => [
 510         "SixXS IPv6 Deployment and Tunnel Broker",
 511         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 512         { action => 'PARAM', proto => 'udp', dport => '3740' },
 513         { action => 'PARAM', proto => '41' },
 514         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 515     ],
 516     'SPICEproxy' => [
 517         "Proxmox VE SPICE display proxy traffic",
 518         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 519     ],
 520     'Squid' => [
 521         "Squid web proxy traffic",
 522         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 523     ],
 524     'Submission' => [
 525         "Mail message submission traffic",
 526         { action => 'PARAM', proto => 'tcp', dport => '587' },
 527     ],
 528     'Syslog' => [
 529         "Syslog protocol (RFC 5424) traffic",
 530         { action => 'PARAM', proto => 'udp', dport => '514' },
 531         { action => 'PARAM', proto => 'tcp', dport => '514' },
 532     ],
 533     'TFTP' => [
 534         "Trivial File Transfer Protocol traffic",
 535         { action => 'PARAM', proto => 'udp', dport => '69' },
 536     ],
 537     'Telnet' => [
 538         "Telnet traffic",
 539         { action => 'PARAM', proto => 'tcp', dport => '23' },
 540     ],
 541     'Telnets' => [
 542         "Telnet over SSL",
 543         { action => 'PARAM', proto => 'tcp', dport => '992' },
 544     ],
 545     'Time' => [
 546         "RFC 868 Time protocol",
 547         { action => 'PARAM', proto => 'tcp', dport => '37' },
 548     ],
 549     'Trcrt' => [
 550         "Traceroute (for up to 30 hops) traffic",
 551         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 552         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 553     ],
 554     'VNC' => [
 555         "VNC traffic for VNC display's 0 - 99",
 556         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 557     ],
 558     'VNCL' => [
 559         "VNC traffic from Vncservers to Vncviewers in listen mode",
 560         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 561     ],
 562     'Web' => [
 563         "WWW traffic (HTTP and HTTPS)",
 564         { action => 'PARAM', proto => 'tcp', dport => '80' },
 565         { action => 'PARAM', proto => 'tcp', dport => '443' },
 566     ],
 567     'Webcache' => [
 568         "Web Cache/Proxy traffic (port 8080)",
 569         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 570     ],
 571     'Webmin' => [
 572         "Webmin traffic",
 573         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 574     ],
 575     'Whois' => [
 576         "Whois (nicname, RFC 3912) traffic",
 577         { action => 'PARAM', proto => 'tcp', dport => '43' },
 578     ],
 579 };
 580
 581 my $pve_fw_helpers = {
 582     'amanda' => { proto => 'udp', dport => '10080', 'v4' => 1, 'v6' => 1 },
 583     'ftp' => { proto => 'tcp', dport => '21', 'v4' => 1, 'v6' => 1},
 584     'irc' => { proto => 'tcp', dport => '6667', 'v4' => 1 },
 585     'netbios-ns' => { proto => 'udp', dport => '137', 'v4' => 1 },
 586     'pptp' => { proto => 'tcp', dport => '1723', 'v4' => 1, },
 587     'sane' => { proto => 'tcp', dport => '6566', 'v4' => 1, 'v6' => 1 },
 588     'sip' => { proto => 'udp', dport => '5060', 'v4' => 1, 'v6' => 1 },
 589     'snmp' => { proto => 'udp', dport => '161', 'v4' => 1 },
 590     'tftp' => { proto => 'udp', dport => '69', 'v4' => 1, 'v6' => 1},
 591 };
 592
 593 my $pve_fw_parsed_macros;
 594 my $pve_fw_macro_descr;
 595 my $pve_fw_macro_ipversion = {};
 596 my $pve_fw_preferred_macro_names = {};
 597
 598 my $FWACCEPTMARK_ON  = "0x80000000/0x80000000";
 599 my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
 600
 601 my $pve_std_chains = {};
 602 my $pve_std_chains_conf = {};
 603 $pve_std_chains_conf->{4} = {
 604     'PVEFW-SET-ACCEPT-MARK' => [
 605         { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
 606     ],
 607     'PVEFW-DropBroadcast' => [
 608         # same as shorewall 'Broadcast'
 609         # simply DROP BROADCAST/MULTICAST/ANYCAST
 610         # we can use this to reduce logging
 611         { action => 'DROP', dsttype => 'BROADCAST' },
 612         { action => 'DROP', dsttype => 'MULTICAST' },
 613         { action => 'DROP', dsttype => 'ANYCAST' },
 614         { action => 'DROP', dest => '224.0.0.0/4' },
 615     ],
 616     'PVEFW-reject' => [
 617         # same as shorewall 'reject'
 618         { action => 'DROP', dsttype => 'BROADCAST' },
 619         { action => 'DROP', source => '224.0.0.0/4' },
 620         { action => 'DROP', proto => 'icmp' },
 621         { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
 622         { match => '-p udp', target => '-j REJECT --reject-with icmp-port-unreachable' },
 623         { match => '-p icmp', target => '-j REJECT --reject-with icmp-host-unreachable' },
 624         { target => '-j REJECT --reject-with icmp-host-prohibited' },
 625     ],
 626     'PVEFW-Drop' => [
 627         # same as shorewall 'Drop', which is equal to DROP,
 628         # but REJECT/DROP some packages to reduce logging,
 629         # and ACCEPT critical ICMP types
 630         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 631         { action => 'PVEFW-DropBroadcast' },
 632         # ACCEPT critical ICMP types
 633         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 634         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 635         # Drop packets with INVALID state
 636         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 637         # Drop Microsoft SMB noise
 638         { action => 'DROP', proto => 'udp', dport => '135,445' },
 639         { action => 'DROP', proto => 'udp', dport => '137:139' },
 640         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 641         { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
 642         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 643         # Drop new/NotSyn traffic so that it doesn't get logged
 644         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 645         # Drop DNS replies
 646         { action => 'DROP', proto => 'udp', sport => 53 },
 647     ],
 648     'PVEFW-Reject' => [
 649         # same as shorewall 'Reject', which is equal to Reject,
 650         # but REJECT/DROP some packages to reduce logging,
 651         # and ACCEPT critical ICMP types
 652         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 653         { action => 'PVEFW-DropBroadcast' },
 654         # ACCEPT critical ICMP types
 655         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 656         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 657         # Drop packets with INVALID state
 658         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 659         # Drop Microsoft SMB noise
 660         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
 661         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 662         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 663         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
 664         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 665         # Drop new/NotSyn traffic so that it doesn't get logged
 666         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 667         # Drop DNS replies
 668         { action => 'DROP', proto => 'udp', sport => 53 },
 669     ],
 670     'PVEFW-tcpflags' => [
 671         # same as shorewall tcpflags action.
 672         # Packets arriving on this interface are checked for some illegal combinations of TCP flags
 673         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
 674         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
 675         { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
 676         { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
 677         { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
 678     ],
 679     'PVEFW-smurfs' => [
 680         # same as shorewall smurfs action
 681         # Filter packets for smurfs (packets with a broadcast address as the source).
 682         { match => '-s 0.0.0.0/32', target => '-j RETURN' }, # allow DHCP
 683         { match => '-m addrtype --src-type BROADCAST', target => '-g PVEFW-smurflog' },
 684         { match => '-s 224.0.0.0/4', target => '-g PVEFW-smurflog' },
 685     ],
 686     'PVEFW-smurflog' => [
 687         { action => 'DROP', logmsg => 'DROP: ' },
 688     ],
 689     'PVEFW-logflags' => [
 690         { action => 'DROP', logmsg => 'DROP: ' },
 691     ],
 692 };
 693
 694 $pve_std_chains_conf->{6} = {
 695     'PVEFW-SET-ACCEPT-MARK' => [
 696         { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
 697     ],
 698     'PVEFW-DropBroadcast' => [
 699         # same as shorewall 'Broadcast'
 700         # simply DROP BROADCAST/MULTICAST/ANYCAST
 701         # we can use this to reduce logging
 702         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 703         # ipv6 addrtype does not work with kernel 2.6.32
 704         #{ action => 'DROP', dsttype => 'MULTICAST' },
 705         #{ action => 'DROP', dsttype => 'ANYCAST' },
 706         { action => 'DROP', dest => 'ff00::/8' },
 707         #{ action => 'DROP', dest => '224.0.0.0/4' },
 708     ],
 709     'PVEFW-reject' => [
 710         { action => 'DROP', proto => 'icmpv6' },
 711         { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
 712         { match => '-p udp', target => '-j REJECT --reject-with icmp6-port-unreachable' },
 713         { target => '-j REJECT --reject-with icmp6-adm-prohibited' },
 714     ],
 715     'PVEFW-Drop' => [
 716         # same as shorewall 'Drop', which is equal to DROP,
 717         # but REJECT/DROP some packages to reduce logging,
 718         # and ACCEPT critical ICMP types
 719         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 720         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 721         { action => 'PVEFW-DropBroadcast' },
 722         # ACCEPT critical ICMP types
 723         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 724         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 725         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 726         # Drop packets with INVALID state
 727         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 728         # Drop Microsoft SMB noise
 729         { action => 'DROP', proto => 'udp', dport => '135,445' },
 730         { action => 'DROP', proto => 'udp', dport => '137:139'},
 731         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 732         { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
 733         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 734         # Drop new/NotSyn traffic so that it doesn't get logged
 735         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 736         # Drop DNS replies
 737         { action => 'DROP', proto => 'udp', sport => 53 },
 738     ],
 739     'PVEFW-Reject' => [
 740         # same as shorewall 'Reject', which is equal to Reject,
 741         # but REJECT/DROP some packages to reduce logging,
 742         # and ACCEPT critical ICMP types
 743         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 744         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 745         { action => 'PVEFW-DropBroadcast' },
 746         # ACCEPT critical ICMP types
 747         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 748         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 749         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 750         # Drop packets with INVALID state
 751         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 752         # Drop Microsoft SMB noise
 753         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
 754         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139' },
 755         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 756         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
 757         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 758         # Drop new/NotSyn traffic so that it doesn't get logged
 759         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 760         # Drop DNS replies
 761         { action => 'DROP', proto => 'udp', sport => 53 },
 762     ],
 763     'PVEFW-tcpflags' => [
 764         # same as shorewall tcpflags action.
 765         # Packets arriving on this interface are checked for some illegal combinations of TCP flags
 766         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
 767         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
 768         { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
 769         { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
 770         { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
 771     ],
 772     'PVEFW-logflags' => [
 773         { action => 'DROP', logmsg => 'DROP: ' },
 774     ],
 775 };
 776
 777 # iptables -p icmp -h
 778 my $icmp_type_names = {
 779     any => 1,
 780     'echo-reply' => 1,
 781     'destination-unreachable' => 1,
 782     'network-unreachable' => 1,
 783     'host-unreachable' => 1,
 784     'protocol-unreachable' => 1,
 785     'port-unreachable' => 1,
 786     'fragmentation-needed' => 1,
 787     'source-route-failed' => 1,
 788     'network-unknown' => 1,
 789     'host-unknown' => 1,
 790     'network-prohibited' => 1,
 791     'host-prohibited' => 1,
 792     'TOS-network-unreachable' => 1,
 793     'TOS-host-unreachable' => 1,
 794     'communication-prohibited' => 1,
 795     'host-precedence-violation' => 1,
 796     'precedence-cutoff' => 1,
 797     'source-quench' => 1,
 798     'redirect' => 1,
 799     'network-redirect' => 1,
 800     'host-redirect' => 1,
 801     'TOS-network-redirect' => 1,
 802     'TOS-host-redirect' => 1,
 803     'echo-request' => 1,
 804     'router-advertisement' => 1,
 805     'router-solicitation' => 1,
 806     'time-exceeded' => 1,
 807     'ttl-zero-during-transit' => 1,
 808     'ttl-zero-during-reassembly' => 1,
 809     'parameter-problem' => 1,
 810     'ip-header-bad' => 1,
 811     'required-option-missing' => 1,
 812     'timestamp-request' => 1,
 813     'timestamp-reply' => 1,
 814     'address-mask-request' => 1,
 815     'address-mask-reply' => 1,
 816 };
 817
 818 # ip6tables -p icmpv6 -h
 819
 820 my $icmpv6_type_names = {
 821     'destination-unreachable' => 1,
 822     'no-route' => 1,
 823     'communication-prohibited' => 1,
 824     'beyond-scope' => 1,
 825     'address-unreachable' => 1,
 826     'port-unreachable' => 1,
 827     'failed-policy' => 1,
 828     'reject-route' => 1,
 829     'packet-too-big' => 1,
 830     'time-exceeded' => 1,
 831     'ttl-zero-during-transit' => 1,
 832     'ttl-zero-during-reassembly' => 1,
 833     'parameter-problem' => 1,
 834     'bad-header' => 1,
 835     'unknown-header-type' => 1,
 836     'unknown-option' => 1,
 837     'echo-request' => 1,
 838     'echo-reply' => 1,
 839     'router-solicitation' => 1,
 840     'router-advertisement' => 1,
 841     'neighbor-solicitation' => 1,
 842     'neighbour-solicitation' => 1,
 843     'neighbor-advertisement' => 1,
 844     'neighbour-advertisement' => 1,
 845     'redirect' => 1,
 846 };
 847
 848 my $is_valid_icmp_type = sub {
 849     my ($type, $valid_types) = @_;
 850
 851     if ($type =~ m/^\d+$/) {
 852         # values for icmp-type range between 0 and 255 (8 bit field)
 853         die "invalid icmp-type '$type'\n" if $type > 255;
 854     } else {
 855         die "unknown icmp-type '$type'\n" if !defined($valid_types->{$type});
 856     }
 857 };
 858
 859 my $proto_is_icmp = sub {
 860     my $proto = shift;
 861     return $proto eq 'icmp' || $proto eq 'icmpv6' || $proto eq 'ipv6-icmp';
 862 };
 863
 864 sub init_firewall_macros {
 865
 866     $pve_fw_parsed_macros = {};
 867
 868     my $parse = sub {
 869         my ($k, $macro) = @_;
 870         my $lc_name = lc($k);
 871         $pve_fw_macro_ipversion->{$k} = 0;
 872         while (!ref($macro->[0])) {
 873             my $desc = shift @$macro;
 874             if ($desc eq 'ipv4only') {
 875                 $pve_fw_macro_ipversion->{$k} = 4;
 876             } elsif ($desc eq 'ipv6only') {
 877                 $pve_fw_macro_ipversion->{$k} = 6;
 878             } else {
 879                 $pve_fw_macro_descr->{$k} = $desc;
 880             }
 881         }
 882         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 883         $pve_fw_parsed_macros->{$k} = $macro;
 884     };
 885
 886     foreach my $k (keys %$pve_fw_macros) {
 887         &$parse($k, $pve_fw_macros->{$k});
 888     }
 889
 890     foreach my $k (keys %$pve_ipv6fw_macros) {
 891         next if $pve_fw_parsed_macros->{$k};
 892         &$parse($k, $pve_ipv6fw_macros->{$k});
 893         $pve_fw_macro_ipversion->{$k} = 6;
 894     }
 895 }
 896
 897 init_firewall_macros();
 898
 899 sub get_macros {
 900     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 901 }
 902
 903 my $etc_services;
 904
 905 sub get_etc_services {
 906
 907     return $etc_services if $etc_services;
 908
 909     my $filename = "/etc/services";
 910
 911     my $fh = IO::File->new($filename, O_RDONLY);
 912     if (!$fh) {
 913         warn "unable to read '$filename' - $!\n";
 914         return {};
 915     }
 916
 917     my $services = {};
 918
 919     while (my $line = <$fh>) {
 920         chomp ($line);
 921         next if $line =~m/^#/;
 922         next if ($line =~m/^\s*$/);
 923
 924         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp|sctp).*$!) {
 925             $services->{byid}->{$2}->{name} = $1;
 926             $services->{byid}->{$2}->{port} = $2;
 927             $services->{byid}->{$2}->{$3} = 1;
 928             $services->{byname}->{$1} = $services->{byid}->{$2};
 929         }
 930     }
 931
 932     close($fh);
 933
 934     $etc_services = $services;
 935
 936
 937     return $etc_services;
 938 }
 939
 940 sub parse_protocol_file {
 941     my ($filename) = @_;
 942
 943     my $fh = IO::File->new($filename, O_RDONLY);
 944     if (!$fh) {
 945         warn "unable to read '$filename' - $!\n";
 946         return {};
 947     }
 948
 949     my $protocols = {};
 950
 951     while (my $line = <$fh>) {
 952         chomp ($line);
 953         next if $line =~m/^#/;
 954         next if ($line =~m/^\s*$/);
 955
 956         if ($line =~ m!^(\S+)\s+(\d+)(?:\s+.*)?$!) {
 957             $protocols->{byid}->{$2}->{name} = $1;
 958             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 959         }
 960     }
 961
 962     close($fh);
 963
 964     return $protocols;
 965 }
 966
 967 my $etc_protocols;
 968
 969 sub get_etc_protocols {
 970     return $etc_protocols if $etc_protocols;
 971
 972     my $protocols = parse_protocol_file('/etc/protocols');
 973
 974     # add special case for ICMP v6
 975     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 976     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 977
 978     $etc_protocols = $protocols;
 979
 980     return $etc_protocols;
 981 }
 982
 983 my $etc_ethertypes;
 984
 985 sub get_etc_ethertypes {
 986     $etc_ethertypes = parse_protocol_file('/etc/ethertypes')
 987         if !$etc_ethertypes;
 988     return $etc_ethertypes;
 989 }
 990
 991 my $__local_network;
 992
 993 sub local_network {
 994     my ($new_value) = @_;
 995
 996     $__local_network = $new_value if defined($new_value);
 997
 998     return $__local_network if defined($__local_network);
 999
1000     eval {
1001         my $nodename = PVE::INotify::nodename();
1002
1003         my $ip = PVE::Cluster::remote_node_ip($nodename);
1004
1005         my $testip = Net::IP->new($ip);
1006
1007         my $isv6 = $testip->version == 6;
1008         my $routes = $isv6 ? PVE::ProcFSTools::read_proc_net_ipv6_route()
1009                            : PVE::ProcFSTools::read_proc_net_route();
1010         foreach my $entry (@$routes) {
1011             my $mask;
1012             if ($isv6) {
1013                 $mask = $entry->{prefix};
1014                 next if !$mask; # skip the default route...
1015             } else {
1016                 $mask = $PVE::Network::ipv4_mask_hash_localnet->{$entry->{mask}};
1017                 next if !defined($mask);
1018             }
1019             my $cidr = "$entry->{dest}/$mask";
1020             my $testnet = Net::IP->new($cidr);
1021             my $overlap = $testnet->overlaps($testip);
1022             if ($overlap == $Net::IP::IP_B_IN_A_OVERLAP ||
1023                 $overlap == $Net::IP::IP_IDENTICAL)
1024             {
1025                 $__local_network = $cidr;
1026                 return;
1027             }
1028         }
1029     };
1030     warn $@ if $@;
1031
1032     return $__local_network;
1033 }
1034
1035 # ipset names are limited to 31 characters,
1036 # and we use '-v4' or '-v6' to indicate IP versions,
1037 # and we use '_swap' suffix for atomic update,
1038 # for example PVEFW-${VMID}-${ipset_name}_swap
1039
1040 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
1041
1042 sub compute_ipset_chain_name {
1043     my ($vmid, $ipset_name, $ipversion) = @_;
1044
1045     $vmid = 0 if !defined($vmid);
1046
1047     my $id = "$vmid-${ipset_name}-v$ipversion";
1048
1049     if (length($id) > $max_iptables_ipset_name_length) {
1050         $id = PVE::Tools::fnv31a_hex($id);
1051     }
1052
1053     return "PVEFW-$id";
1054 }
1055
1056 sub compute_ipfilter_ipset_name {
1057     my ($iface) = @_;
1058
1059     return "ipfilter-$iface";
1060 }
1061
1062 sub parse_address_list {
1063     my ($str) = @_;
1064
1065     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
1066         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
1067         return;
1068     }
1069
1070     if ($str =~ m/^${ip_alias_pattern}$/) {
1071         die "alias name too long\n" if length($str) > $max_alias_name_length;
1072         return;
1073     }
1074
1075     my $count = 0;
1076     my $iprange = 0;
1077     my $ipversion;
1078
1079     my @elements = split(/,/, $str);
1080     die "extraneous commas in list\n" if $str ne join(',', @elements);
1081     foreach my $elem (@elements) {
1082         $count++;
1083         my $ip = Net::IP->new($elem);
1084         if (!$ip) {
1085             my $err = Net::IP::Error();
1086             die "invalid IP address: $err\n";
1087         }
1088         $iprange = 1 if $elem =~ m/-/;
1089
1090         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
1091
1092         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
1093             if $ipversion && ($new_ipversion != $ipversion);
1094
1095         $ipversion = $new_ipversion;
1096     }
1097
1098     die "you can't use a range in a list\n" if $iprange && $count > 1;
1099
1100     return $ipversion;
1101 }
1102
1103 # $dport must only be set to 1 if the parsed parameter is dport and the
1104 # protocol is one of the ICMP variants - ICMP type values used to be stored in
1105 # the dport parameter.
1106 sub parse_port_name_number_or_range {
1107     my ($str, $dport) = @_;
1108
1109     my $services = PVE::Firewall::get_etc_services();
1110     my $count = 0;
1111     my $icmp_port = 0;
1112
1113     my @elements = split(/,/, $str);
1114     die "extraneous commas in list\n" if $str ne join(',', @elements);
1115     foreach my $item (@elements) {
1116         if ($item =~ m/^([0-9]+):([0-9]+)$/) {
1117             $count += 2;
1118             my ($port1, $port2) = ($1, $2);
1119             die "invalid port '$port1'\n" if $port1 > 65535;
1120             die "invalid port '$port2'\n" if $port2 > 65535;
1121             die "backwards range '$port1:$port2' not allowed, did you mean '$port2:$port1'?\n" if $port1 > $port2;
1122         } elsif ($item =~ m/^([0-9]+)$/) {
1123             $count += 1;
1124             my $port = $1;
1125             die "invalid port '$port'\n" if $port > 65535;
1126         } else {
1127             if ($dport && $icmp_type_names->{$item}) {
1128                 $icmp_port = 1;
1129             } elsif ($dport && $icmpv6_type_names->{$item}) {
1130                 $icmp_port = 1;
1131             } else {
1132                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1133             }
1134         }
1135     }
1136
1137     die "ICMP ports not allowed in port range\n" if $icmp_port && $count > 0;
1138
1139     # I really don't like to use the word number here, but it's the only thing
1140     # that makes sense in a literal way. The range 1:100 counts as 2, not as
1141     # one and not as 100...
1142     die "too many entries in port list (> 15 numbers)\n"
1143         if $count > 15;
1144
1145     return (scalar(@elements) > 1);
1146 }
1147
1148 PVE::JSONSchema::register_format('pve-fw-conntrack-helper', \&pve_fw_verify_conntrack_helper);
1149 sub pve_fw_verify_conntrack_helper {
1150    my ($list) = @_;
1151
1152    my @helpers = split(/,/, $list);
1153    die "extraneous commas in list\n" if $list ne join(',', @helpers);
1154    foreach my $helper (@helpers) {
1155         die "unknown helper $helper" if !$pve_fw_helpers->{$helper};
1156    }
1157
1158    return $list;
1159 }
1160
1161 PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1162 sub pve_fw_verify_sport_spec {
1163    my ($portstr) = @_;
1164
1165    parse_port_name_number_or_range($portstr, 0);
1166
1167    return $portstr;
1168 }
1169
1170 PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1171 sub pve_fw_verify_dport_spec {
1172    my ($portstr) = @_;
1173
1174    parse_port_name_number_or_range($portstr, 1);
1175
1176    return $portstr;
1177 }
1178
1179 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1180 sub pve_fw_verify_addr_spec {
1181    my ($list) = @_;
1182
1183    parse_address_list($list);
1184
1185    return $list;
1186 }
1187
1188 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1189 sub pve_fw_verify_protocol_spec {
1190    my ($proto) = @_;
1191
1192    my $protocols = get_etc_protocols();
1193
1194    die "unknown protocol '$proto'\n" if $proto &&
1195        !(defined($protocols->{byname}->{$proto}) ||
1196          defined($protocols->{byid}->{$proto}));
1197
1198    return $proto;
1199 }
1200
1201 PVE::JSONSchema::register_format('pve-fw-icmp-type-spec', \&pve_fw_verify_icmp_type_spec);
1202 sub pve_fw_verify_icmp_type_spec {
1203     my ($icmp_type) = @_;
1204
1205     if ($icmp_type_names->{$icmp_type} ||  $icmpv6_type_names->{$icmp_type}) {
1206         return $icmp_type;
1207     }
1208
1209     die "invalid icmp-type value '$icmp_type'\n" if $icmp_type ne '';
1210
1211     return $icmp_type;
1212 }
1213
1214
1215 # helper function for API
1216
1217 sub copy_opject_with_digest {
1218     my ($object) = @_;
1219
1220     my $sha = Digest::SHA->new('sha1');
1221
1222     my $res = {};
1223     foreach my $k (sort keys %$object) {
1224         my $v = $object->{$k};
1225         next if !defined($v);
1226         $res->{$k} = $v;
1227         $sha->add($k, ':', $v, "\n");
1228     }
1229
1230     my $digest = $sha->hexdigest;
1231
1232     $res->{digest} = $digest;
1233
1234     return wantarray ? ($res, $digest) : $res;
1235 }
1236
1237 sub copy_list_with_digest {
1238     my ($list) = @_;
1239
1240     my $sha = Digest::SHA->new('sha1');
1241
1242     my $res = [];
1243     foreach my $entry (@$list) {
1244         my $data = {};
1245         foreach my $k (sort keys %$entry) {
1246             my $v = $entry->{$k};
1247             next if !defined($v);
1248             $data->{$k} = $v;
1249             # Note: digest ignores refs ($rule->{errors})
1250             # since Digest::SHA expects a series of bytes,
1251             #  we have to encode the value here to prevent errors when
1252             #  using utf8 characters (eg. in comments)
1253             $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
1254         }
1255         push @$res, $data;
1256     }
1257
1258     my $digest = $sha->hexdigest;
1259
1260     foreach my $entry (@$res) {
1261         $entry->{digest} = $digest;
1262     }
1263
1264     return wantarray ? ($res, $digest) : $res;
1265 }
1266
1267 our $cluster_option_properties = {
1268     enable => {
1269         description => "Enable or disable the firewall cluster wide.",
1270         type => 'integer',
1271         minimum => 0,
1272         optional => 1,
1273     },
1274     ebtables => {
1275         description => "Enable ebtables rules cluster wide.",
1276         type => 'boolean',
1277         default => 1,
1278         optional => 1,
1279     },
1280     policy_in => {
1281         description => "Input policy.",
1282         type => 'string',
1283         optional => 1,
1284         enum => ['ACCEPT', 'REJECT', 'DROP'],
1285     },
1286     policy_out => {
1287         description => "Output policy.",
1288         type => 'string',
1289         optional => 1,
1290         enum => ['ACCEPT', 'REJECT', 'DROP'],
1291     },
1292     log_ratelimit => {
1293         description => "Log ratelimiting settings",
1294         type => 'string', format => {
1295             enable => {
1296                 default_key => 1,
1297                 description => 'Enable or disable log rate limiting',
1298                 type => 'boolean',
1299                 default => '1',
1300             },
1301             rate => {
1302                 type => 'string',
1303                 description => 'Frequency with which the burst bucket gets refilled',
1304                 optional => 1,
1305                 pattern => '[1-9][0-9]*\/(second|minute|hour|day)',
1306                 format_description => 'rate',
1307                 default => '1/second',
1308             },
1309             burst => {
1310                 type => 'integer',
1311                 minimum => 0,
1312                 optional => 1,
1313                 description => 'Initial burst of packages which will always get logged before the rate is applied',
1314                 default => 5,
1315             },
1316         },
1317         optional => 1,
1318     },
1319 };
1320
1321 our $host_option_properties = {
1322     enable => {
1323         description => "Enable host firewall rules.",
1324         type => 'boolean',
1325         optional => 1,
1326     },
1327     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1328         description => "Log level for incoming traffic." }),
1329     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1330         description => "Log level for outgoing traffic." }),
1331     tcp_flags_log_level =>  get_standard_option('pve-fw-loglevel', {
1332         description => "Log level for illegal tcp flags filter." }),
1333     smurf_log_level =>  get_standard_option('pve-fw-loglevel', {
1334         description => "Log level for SMURFS filter." }),
1335     nosmurfs => {
1336         description => "Enable SMURFS filter.",
1337         type => 'boolean',
1338         optional => 1,
1339     },
1340     tcpflags => {
1341         description => "Filter illegal combinations of TCP flags.",
1342         type => 'boolean',
1343         default => 0,
1344         optional => 1,
1345     },
1346     nf_conntrack_max => {
1347         description => "Maximum number of tracked connections.",
1348         type => 'integer',
1349         optional => 1,
1350         default => 262144,
1351         minimum => 32768,
1352     },
1353     nf_conntrack_tcp_timeout_established => {
1354         description => "Conntrack established timeout.",
1355         type => 'integer',
1356         optional => 1,
1357         default => 432000,
1358         minimum => 7875,
1359     },
1360     nf_conntrack_tcp_timeout_syn_recv => {
1361         description => "Conntrack syn recv timeout.",
1362         type => 'integer',
1363         optional => 1,
1364         default => 60,
1365         minimum => 30,
1366         maximum => 60,
1367     },
1368     ndp => {
1369         description => "Enable NDP (Neighbor Discovery Protocol).",
1370         type => 'boolean',
1371         default => 0,
1372         optional => 1,
1373     },
1374     nf_conntrack_allow_invalid => {
1375         description => "Allow invalid packets on connection tracking.",
1376         type => 'boolean',
1377         default => 0,
1378         optional => 1,
1379     },
1380     nf_conntrack_helpers => {
1381         type => 'string', format => 'pve-fw-conntrack-helper',
1382         description => "Enable conntrack helpers for specific protocols. ".
1383             "Supported protocols: amanda, ftp, irc, netbios-ns, pptp, sane, sip, snmp, tftp",
1384         default => '',
1385         optional => 1,
1386     },
1387     protection_synflood => {
1388         description => "Enable synflood protection",
1389         type => 'boolean',
1390         default => 0,
1391         optional => 1,
1392     },
1393     protection_synflood_rate => {
1394         description => "Synflood protection rate syn/sec by ip src.",
1395         type => 'integer',
1396         optional => 1,
1397         default => 200,
1398     },
1399     protection_synflood_burst => {
1400         description => "Synflood protection rate burst by ip src.",
1401         type => 'integer',
1402         optional => 1,
1403         default => 1000,
1404     },
1405     log_nf_conntrack => {
1406         description => "Enable logging of conntrack information.",
1407         type => 'boolean',
1408         default => 0,
1409         optional => 1
1410     },
1411 };
1412
1413 our $vm_option_properties = {
1414     enable => {
1415         description => "Enable/disable firewall rules.",
1416         type => 'boolean',
1417         default => 0,
1418         optional => 1,
1419     },
1420     macfilter => {
1421         description => "Enable/disable MAC address filter.",
1422         type => 'boolean',
1423         default => 1,
1424         optional => 1,
1425     },
1426     dhcp => {
1427         description => "Enable DHCP.",
1428         type => 'boolean',
1429         default => 0,
1430         optional => 1,
1431     },
1432     ndp => {
1433         description => "Enable NDP (Neighbor Discovery Protocol).",
1434         type => 'boolean',
1435         default => 0,
1436         optional => 1,
1437     },
1438     radv => {
1439         description => "Allow sending Router Advertisement.",
1440         type => 'boolean',
1441         optional => 1,
1442     },
1443     ipfilter => {
1444         description => "Enable default IP filters. " .
1445            "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1446            "for every interface. Such ipsets implicitly contain sane default " .
1447            "restrictions such as restricting IPv6 link local addresses to " .
1448            "the one derived from the interface's MAC address. For containers " .
1449            "the configured IP addresses will be implicitly added.",
1450         type => 'boolean',
1451         optional => 1,
1452     },
1453     policy_in => {
1454         description => "Input policy.",
1455         type => 'string',
1456         optional => 1,
1457         enum => ['ACCEPT', 'REJECT', 'DROP'],
1458     },
1459     policy_out => {
1460         description => "Output policy.",
1461         type => 'string',
1462         optional => 1,
1463         enum => ['ACCEPT', 'REJECT', 'DROP'],
1464     },
1465     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1466         description => "Log level for incoming traffic." }),
1467     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1468         description => "Log level for outgoing traffic." }),
1469
1470 };
1471
1472
1473 my $addr_list_descr = "This can refer to a single IP address, an IP set ('+ipsetname') or an IP alias definition. You can also specify an address range like '20.34.101.207-201.3.9.99', or a list of IP addresses and networks (entries are separated by comma). Please do not mix IPv4 and IPv6 addresses inside such lists.";
1474
1475 my $port_descr = "You can use service names or simple numbers (0-65535), as defined in '/etc/services'. Port ranges can be specified with '\\d+:\\d+', for example '80:85', and you can use comma separated list to match several ports or ranges.";
1476
1477 my $rule_properties = {
1478     pos => {
1479         description => "Update rule at position <pos>.",
1480         type => 'integer',
1481         minimum => 0,
1482         optional => 1,
1483     },
1484     digest => get_standard_option('pve-config-digest'),
1485     type => {
1486         description => "Rule type.",
1487         type => 'string',
1488         optional => 1,
1489         enum => ['in', 'out', 'group'],
1490     },
1491     action => {
1492         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1493         type => 'string',
1494         optional => 1,
1495         pattern => $security_group_name_pattern,
1496         maxLength => 20,
1497         minLength => 2,
1498     },
1499     macro => {
1500         description => "Use predefined standard macro.",
1501         type => 'string',
1502         optional => 1,
1503         maxLength => 128,
1504     },
1505     iface => get_standard_option('pve-iface', {
1506         description => "Network interface name. You have to use network configuration key names for VMs and containers ('net\\d+'). Host related rules can use arbitrary strings.",
1507         optional => 1
1508     }),
1509     source => {
1510         description => "Restrict packet source address. $addr_list_descr",
1511         type => 'string', format => 'pve-fw-addr-spec',
1512         optional => 1,
1513         maxLength => 512,
1514     },
1515     dest => {
1516         description => "Restrict packet destination address. $addr_list_descr",
1517         type => 'string', format => 'pve-fw-addr-spec',
1518         optional => 1,
1519         maxLength => 512,
1520     },
1521     proto => {
1522         description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1523         type => 'string', format => 'pve-fw-protocol-spec',
1524         optional => 1,
1525     },
1526     enable => {
1527         description => "Flag to enable/disable a rule.",
1528         type => 'integer',
1529         minimum => 0,
1530         optional => 1,
1531     },
1532     log => get_standard_option('pve-fw-loglevel', {
1533         description => "Log level for firewall rule.",
1534     }),
1535     sport => {
1536         description => "Restrict TCP/UDP source port. $port_descr",
1537         type => 'string', format => 'pve-fw-sport-spec',
1538         optional => 1,
1539     },
1540     dport => {
1541         description => "Restrict TCP/UDP destination port. $port_descr",
1542         type => 'string', format => 'pve-fw-dport-spec',
1543         optional => 1,
1544     },
1545     comment => {
1546         description => "Descriptive comment.",
1547         type => 'string',
1548         optional => 1,
1549     },
1550     'icmp-type' => {
1551         description => "Specify icmp-type. Only valid if proto equals 'icmp' or 'icmpv6'/'ipv6-icmp'.",
1552         type => 'string', format => 'pve-fw-icmp-type-spec',
1553         optional => 1,
1554     },
1555 };
1556
1557 sub add_rule_properties {
1558     my ($properties) = @_;
1559
1560     foreach my $k (keys %$rule_properties) {
1561         my $h = $rule_properties->{$k};
1562         # copy data, so that we can modify later without side effects
1563         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1564     }
1565
1566     return $properties;
1567 }
1568
1569 sub delete_rule_properties {
1570     my ($rule, $delete_str) = @_;
1571
1572     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1573         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1574             if !defined($rule_properties->{$opt});
1575         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1576             if $opt eq 'type' || $opt eq 'action';
1577         delete $rule->{$opt};
1578     }
1579
1580     return $rule;
1581 }
1582
1583 my $apply_macro = sub {
1584     my ($macro_name, $param, $verify, $ipversion) = @_;
1585
1586     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1587     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1588
1589     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1590         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1591     }
1592
1593     # skip macros which are specific to another ipversion
1594     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1595         return if $ipversion != $required;
1596     }
1597
1598     my $rules = [];
1599
1600     foreach my $templ (@$macro_rules) {
1601         my $rule = {};
1602         my $param_used = {};
1603         foreach my $k (keys %$templ) {
1604             my $v = $templ->{$k};
1605             if ($v eq 'PARAM') {
1606                 $v = $param->{$k};
1607                 $param_used->{$k} = 1;
1608             } elsif ($v eq 'DEST') {
1609                 $v = $param->{dest};
1610                 $param_used->{dest} = 1;
1611             } elsif ($v eq 'SOURCE') {
1612                 $v = $param->{source};
1613                 $param_used->{source} = 1;
1614             }
1615
1616             if (!defined($v)) {
1617                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1618                 raise_param_exc({ macro => $msg }) if $verify;
1619                 die "$msg\n";
1620             }
1621             $rule->{$k} = $v;
1622         }
1623         foreach my $k (keys %$param) {
1624             next if $k eq 'macro';
1625             next if !defined($param->{$k});
1626             next if $param_used->{$k};
1627             if (defined($rule->{$k})) {
1628                 if ($rule->{$k} ne $param->{$k}) {
1629                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1630                     raise_param_exc({ $k => $msg }) if $verify;
1631                     die "$msg\n";
1632                 }
1633             } else {
1634                 $rule->{$k} = $param->{$k};
1635             }
1636         }
1637         push @$rules, $rule;
1638     }
1639
1640     return $rules;
1641 };
1642
1643 my $rule_env_iface_lookup = {
1644     'ct' => 1,
1645     'vm' => 1,
1646     'group' => 0,
1647     'cluster' => 1,
1648     'host' => 1,
1649 };
1650
1651 sub verify_rule {
1652     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1653
1654     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1655
1656     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1657     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1658
1659     my $errors = $rule->{errors} || {};
1660
1661     my $error_count = 0;
1662
1663     my $add_error = sub {
1664         my ($param, $msg)  = @_;
1665         chomp $msg;
1666         raise_param_exc({ $param => $msg }) if !$noerr;
1667         $error_count++;
1668         $errors->{$param} = $msg if !$errors->{$param};
1669     };
1670
1671     my $ipversion;
1672     my $set_ip_version = sub {
1673         my $vers = shift;
1674         if ($vers) {
1675             die "detected mixed ipv4/ipv6 addresses in rule\n"
1676                 if $ipversion && ($vers != $ipversion);
1677             $ipversion = $vers;
1678         }
1679     };
1680
1681     my $check_ipset_or_alias_property = sub {
1682         my ($name, $expected_ipversion) = @_;
1683
1684         if (my $value = $rule->{$name}) {
1685             if ($value =~ m/^\+/) {
1686                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1687                     &$add_error($name, "no such ipset '$1'")
1688                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1689
1690                 } else {
1691                     &$add_error($name, "invalid ipset name '$value'");
1692                 }
1693             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1694                 my $alias = lc($value);
1695                 &$add_error($name, "no such alias '$value'")
1696                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1697                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1698                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1699
1700                 &$set_ip_version($e->{ipversion});
1701             }
1702         }
1703     };
1704
1705     my $type = $rule->{type};
1706     my $action = $rule->{action};
1707
1708     &$add_error('type', "missing property") if !$type;
1709     &$add_error('action', "missing property") if !$action;
1710
1711     if ($type) {
1712         if ($type eq  'in' || $type eq 'out') {
1713             &$add_error('action', "unknown action '$action'")
1714                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1715         } elsif ($type eq 'group') {
1716             &$add_error('type', "security groups not allowed")
1717                 if !$allow_groups;
1718             &$add_error('action', "invalid characters in security group name")
1719                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1720         } else {
1721             &$add_error('type', "unknown rule type '$type'");
1722         }
1723     }
1724
1725     if ($rule->{iface}) {
1726         &$add_error('type', "parameter -i not allowed for this rule type")
1727             if !$allow_iface;
1728         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1729         &$add_error('iface', $@) if $@;
1730         if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1731             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1732                 if $rule->{iface} !~  m/^net(\d+)$/;
1733         }
1734     }
1735
1736     if ($rule->{macro}) {
1737         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1738             $rule->{macro} = $preferred_name;
1739         } else {
1740             &$add_error('macro', "unknown macro '$rule->{macro}'");
1741         }
1742     }
1743
1744     my $is_icmp = 0;
1745     if ($rule->{proto}) {
1746         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1747         &$add_error('proto', $@) if $@;
1748         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1749         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1750         &$set_ip_version(6) if $rule->{proto} eq 'ipv6-icmp';
1751         $is_icmp = $proto_is_icmp->($rule->{proto});
1752     }
1753
1754     if ($rule->{dport}) {
1755         eval { parse_port_name_number_or_range($rule->{dport}, $is_icmp); };
1756         &$add_error('dport', $@) if $@;
1757         my $proto = $rule->{proto};
1758         &$add_error('proto', "missing property - 'dport' requires this property")
1759             if !$proto;
1760         &$add_error('dport', "protocol '$proto' does not support ports")
1761             if !$PROTOCOLS_WITH_PORTS->{$proto} && !$is_icmp; #special cases
1762     }
1763
1764     if (my $icmp_type = $rule ->{'icmp-type'}) {
1765         my $proto = $rule->{proto};
1766         &$add_error('proto', "missing property - 'icmp-type' requires this property")
1767             if !$is_icmp;
1768         &$add_error('icmp-type', "'icmp-type' cannot be specified together with 'dport'")
1769             if $rule->{dport};
1770         if ($proto eq 'icmp' && !$icmp_type_names->{$icmp_type}) {
1771             &$add_error('icmp-type', "invalid icmp-type '$icmp_type' for proto 'icmp'");
1772         } elsif (($proto eq 'icmpv6' || $proto eq 'ipv6-icmp') && !$icmpv6_type_names->{$icmp_type}) {
1773             &$add_error('icmp-type', "invalid icmp-type '$icmp_type' for proto '$proto'");
1774         }
1775     }
1776
1777     if ($rule->{sport}) {
1778         eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1779         &$add_error('sport', $@) if $@;
1780         my $proto = $rule->{proto};
1781         &$add_error('proto', "missing property - 'sport' requires this property")
1782             if !$proto;
1783         &$add_error('sport', "protocol '$proto' does not support ports")
1784             if !$PROTOCOLS_WITH_PORTS->{$proto};
1785     }
1786
1787     if ($rule->{source}) {
1788         eval {
1789             my $source_ipversion = parse_address_list($rule->{source});
1790             &$set_ip_version($source_ipversion);
1791         };
1792         &$add_error('source', $@) if $@;
1793         &$check_ipset_or_alias_property('source', $ipversion);
1794     }
1795
1796     if ($rule->{dest}) {
1797         eval {
1798             my $dest_ipversion = parse_address_list($rule->{dest});
1799             &$set_ip_version($dest_ipversion);
1800         };
1801         &$add_error('dest', $@) if $@;
1802         &$check_ipset_or_alias_property('dest', $ipversion);
1803     }
1804
1805     $rule->{ipversion} = $ipversion if $ipversion;
1806
1807     if ($rule->{macro} && !$error_count) {
1808         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1809         if (my $err = $@) {
1810             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1811                 my $eh = $err->{errors};
1812                 foreach my $p (keys %$eh) {
1813                     &$add_error($p, $eh->{$p});
1814                 }
1815             } else {
1816                 &$add_error('macro', "$err");
1817             }
1818         }
1819     }
1820
1821     $rule->{errors} = $errors if $error_count;
1822
1823     return $rule;
1824 }
1825
1826 sub copy_rule_data {
1827     my ($rule, $param) = @_;
1828
1829     foreach my $k (keys %$rule_properties) {
1830         if (defined(my $v = $param->{$k})) {
1831             if ($v eq '' || $v eq '-') {
1832                 delete $rule->{$k};
1833             } else {
1834                 $rule->{$k} = $v;
1835             }
1836         }
1837     }
1838
1839     return $rule;
1840 }
1841
1842 sub rules_modify_permissions {
1843     my ($rule_env) = @_;
1844
1845     if ($rule_env eq 'host') {
1846         return {
1847             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1848         };
1849     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1850         return {
1851             check => ['perm', '/', [ 'Sys.Modify' ]],
1852         };
1853     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1854         return {
1855             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1856         }
1857     }
1858
1859     return undef;
1860 }
1861
1862 sub rules_audit_permissions {
1863     my ($rule_env) = @_;
1864
1865     if ($rule_env eq 'host') {
1866         return {
1867             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1868         };
1869     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1870         return {
1871             check => ['perm', '/', [ 'Sys.Audit' ]],
1872         };
1873     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1874         return {
1875             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1876         }
1877     }
1878
1879     return undef;
1880 }
1881
1882 # core functions
1883
1884 sub enable_bridge_firewall {
1885
1886
1887     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1888     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1889
1890     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1891     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1892
1893 }
1894
1895 sub iptables_restore_cmdlist {
1896     my ($cmdlist, $table) = @_;
1897
1898     $table = 'filter' if !$table;
1899     run_command(['iptables-restore', '-T', $table, '-n'], input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1900 }
1901
1902 sub ip6tables_restore_cmdlist {
1903     my ($cmdlist, $table) = @_;
1904
1905     $table = 'filter' if !$table;
1906     run_command(['ip6tables-restore', '-T', $table, '-n'], input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1907 }
1908
1909 sub ipset_restore_cmdlist {
1910     my ($cmdlist) = @_;
1911
1912     run_command(['ipset', 'restore'], input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1913 }
1914
1915 sub ebtables_restore_cmdlist {
1916     my ($cmdlist) = @_;
1917
1918     run_command(['ebtables-restore'], input => $cmdlist, errmsg => "ebtables_restore_cmdlist");
1919 }
1920
1921 sub iptables_get_chains {
1922     my ($iptablescmd, $t) = @_;
1923
1924     $iptablescmd = "iptables" if !$iptablescmd;
1925     $t = 'filter' if !$t;
1926
1927     my $res = {};
1928
1929     # check what chains we want to track
1930     my $is_pvefw_chain = sub {
1931         my $name = shift;
1932
1933         return 1 if $name =~ m/^PVEFW-\S+$/;
1934
1935         return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1936
1937         return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1938
1939         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1940         return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1941
1942         return undef;
1943     };
1944
1945     my $table = '';
1946
1947     my $hooks = {};
1948
1949     my $parser = sub {
1950         my $line = shift;
1951
1952         return if $line =~ m/^#/;
1953         return if $line =~ m/^\s*$/;
1954
1955         if ($line =~ m/^\*(\S+)$/) {
1956             $table = $1;
1957             return;
1958         }
1959
1960         return if $table ne $t;
1961
1962         if ($line =~ m/^:(\S+)\s/) {
1963             my $chain = $1;
1964             return if !&$is_pvefw_chain($chain);
1965             $res->{$chain} = "unknown";
1966         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1967             my ($chain, $sig) = ($1, $2);
1968             return if !&$is_pvefw_chain($chain);
1969             $res->{$chain} = $sig;
1970         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD|PREROUTING)\s+-j\s+PVEFW-\1$/) {
1971             $hooks->{$1} = 1;
1972         } else {
1973             # simply ignore the rest
1974             return;
1975         }
1976     };
1977
1978     run_command(["$iptablescmd-save"], outfunc => $parser);
1979
1980     return wantarray ? ($res, $hooks) : $res;
1981 }
1982
1983 sub iptables_chain_digest {
1984     my ($rules) = @_;
1985     my $digest = Digest::SHA->new('sha1');
1986     foreach my $rule (@$rules) { # order is important
1987         $digest->add($rule);
1988     }
1989     return $digest->b64digest;
1990 }
1991
1992 sub ipset_chain_digest {
1993     my ($rules) = @_;
1994
1995     my $digest = Digest::SHA->new('sha1');
1996     foreach my $rule (sort @$rules) { # note: sorted
1997         $digest->add($rule);
1998     }
1999     return $digest->b64digest;
2000 }
2001
2002 sub ipset_get_chains {
2003
2004     my $res = {};
2005     my $chains = {};
2006
2007     my $parser = sub {
2008         my $line = shift;
2009
2010         return if $line =~ m/^#/;
2011         return if $line =~ m/^\s*$/;
2012         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
2013             my $chain = $1;
2014             # ignore initval from ipset v7.7+, won't set that yet so it'd mess up change detection
2015             $line =~ s/\binitval 0x[0-9a-f]+//;
2016             $line =~ s/\s+$//; # delete trailing white space
2017             push @{$chains->{$chain}}, $line;
2018         } else {
2019             # simply ignore the rest
2020             return;
2021         }
2022     };
2023
2024     run_command(['ipset', 'save'], outfunc => $parser);
2025
2026     # compute digest for each chain
2027     foreach my $chain (keys %$chains) {
2028         $res->{$chain} = ipset_chain_digest($chains->{$chain});
2029     }
2030
2031     return $res;
2032 }
2033
2034 sub ebtables_get_chains {
2035
2036     my $res = {};
2037     my $chains = {};
2038     my $table;
2039     my $parser = sub {
2040         my $line = shift;
2041         return if $line =~ m/^#/;
2042         return if $line =~ m/^\s*$/;
2043         if ($line =~ m/^\*(\S+)$/) {
2044             $table = $1;
2045             return;
2046         }
2047
2048         return if $table ne "filter";
2049
2050         if ($line =~ m/^:(\S+)\s(ACCEPT|DROP|RETURN)$/) {
2051             # Make sure we know chains exist even if they're empty.
2052             $chains->{$1} //= [];
2053             $res->{$1}->{policy} = $2;
2054         } elsif ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
2055             my $chain = $1;
2056             $line =~ s/\s+$//;
2057             push @{$chains->{$chain}}, $line;
2058         } else {
2059             # simply ignore the rest
2060             return;
2061         }
2062     };
2063
2064     run_command(['ebtables-save'], outfunc => $parser);
2065     # compute digest for each chain and store rules as well
2066     foreach my $chain (keys %$chains) {
2067         $res->{$chain}->{rules} = $chains->{$chain};
2068         $res->{$chain}->{sig} = iptables_chain_digest($chains->{$chain});
2069     }
2070     return $res;
2071 }
2072
2073 # substitute action of rule according to action hash
2074 sub rule_substitude_action {
2075     my ($rule, $actions) = @_;
2076
2077     if (my $action = $rule->{action}) {
2078         $rule->{action} = $actions->{$action} if defined($actions->{$action});
2079     }
2080 }
2081
2082 # generate a src or dst match
2083 # $dir(ection) is either d or s
2084 sub ipt_gen_src_or_dst_match {
2085     my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
2086
2087     my $srcdst;
2088     if ($dir eq 's') {
2089         $srcdst = "src";
2090     } elsif ($dir eq 'd') {
2091         $srcdst = "dst";
2092     } else {
2093         die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
2094     }
2095
2096     my $match;
2097     if ($adr =~ m/^\+/) {
2098         if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
2099             my $name = $1;
2100             my $ipset_chain;
2101             if ($fw_conf && $fw_conf->{ipset}->{$name}) {
2102                 $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
2103             } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
2104                 $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
2105             } else {
2106                 die "no such ipset '$name'\n";
2107             }
2108             $match = "-m set --match-set ${ipset_chain} ${srcdst}";
2109         } else {
2110             die "invalid security group name '$adr'\n";
2111         }
2112     } elsif ($adr =~ m/^${ip_alias_pattern}$/){
2113         my $alias = lc($adr);
2114         my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2115         $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
2116         die "no such alias '$adr'\n" if !$e;
2117         $match = "-${dir} $e->{cidr}";
2118     } elsif ($adr =~ m/\-/){
2119         $match = "-m iprange --${srcdst}-range $adr";
2120     } else {
2121         $match = "-${dir} $adr";
2122     }
2123
2124     return $match;
2125 }
2126
2127 # convert a %rule to an array of iptables commands
2128 sub ipt_rule_to_cmds {
2129     my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
2130
2131     die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
2132
2133     my @match = ();
2134
2135     if (defined $rule->{match}) {
2136         push @match, $rule->{match};
2137     } else {
2138         push @match, "-i $rule->{iface_in}" if $rule->{iface_in};
2139         push @match, "-o $rule->{iface_out}" if $rule->{iface_out};
2140
2141         if ($rule->{source}) {
2142             push @match, ipt_gen_src_or_dst_match($rule->{source}, 's', $ipversion, $cluster_conf, $fw_conf);
2143         }
2144         if ($rule->{dest}) {
2145             push @match, ipt_gen_src_or_dst_match($rule->{dest}, 'd', $ipversion, $cluster_conf, $fw_conf);
2146         }
2147
2148         if (my $proto = $rule->{proto}) {
2149             push @match, "-p $proto";
2150             my $is_icmp = $proto_is_icmp->($proto);
2151
2152             my $multidport = defined($rule->{dport}) && parse_port_name_number_or_range($rule->{dport}, $is_icmp);
2153             my $multisport = defined($rule->{sport}) && parse_port_name_number_or_range($rule->{sport}, 0);
2154
2155             my $add_dport = sub {
2156                 return if !defined($rule->{dport});
2157
2158                 # NOTE: we re-use dport to store --icmp-type for icmp* protocol
2159                 if ($proto eq 'icmp') {
2160                     $is_valid_icmp_type->($rule->{dport}, $icmp_type_names);
2161                     push @match, "-m icmp --icmp-type $rule->{dport}";
2162                 } elsif ($proto eq 'icmpv6') {
2163                     $is_valid_icmp_type->($rule->{dport}, $icmpv6_type_names);
2164                     push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
2165                 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
2166                     die "protocol $proto does not have ports\n";
2167                 } elsif ($multidport) {
2168                     push @match, "--match multiport", "--dports $rule->{dport}";
2169                 } else {
2170                     return if !$rule->{dport};
2171                     push @match, "--dport $rule->{dport}";
2172                 }
2173             };
2174
2175             my $add_sport = sub {
2176                 return if !$rule->{sport};
2177
2178                 die "protocol $proto does not have ports\n"
2179                     if !$PROTOCOLS_WITH_PORTS->{$proto};
2180                 if ($multisport) {
2181                     push @match, "--match multiport", "--sports $rule->{sport}";
2182                 } else {
2183                     push @match, "--sport $rule->{sport}";
2184                 }
2185             };
2186
2187             my $add_icmp_type = sub {
2188                 return if !defined($rule->{'icmp-type'}) || $rule->{'icmp-type'} eq '';
2189
2190                 die "'icmp-type' can only be set if 'icmp', 'icmpv6' or 'ipv6-icmp' is specified\n"
2191                     if !$is_icmp;
2192                 my $type = $proto eq 'icmp' ? 'icmp-type' : 'icmpv6-type';
2193
2194                 push @match, "-m $proto --$type $rule->{'icmp-type'}";
2195             };
2196
2197             # order matters - single port before multiport!
2198             $add_icmp_type->();
2199             $add_dport->() if $multisport;
2200             $add_sport->();
2201             $add_dport->() if !$multisport;
2202         } elsif ($rule->{dport} || $rule->{sport}) {
2203             die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
2204             die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
2205         }
2206
2207         push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
2208     }
2209     my $matchstr = scalar(@match) ? join(' ', @match) : "";
2210
2211     my $targetstr;
2212     if (defined $rule->{target}) {
2213         $targetstr = $rule->{target};
2214     } else {
2215         my $action = (defined $rule->{action}) ? $rule->{action} : "";
2216         $targetstr = $action eq 'PVEFW-SET-ACCEPT-MARK' ? "-g $action" : "-j $action";
2217     }
2218
2219     my @iptcmds;
2220     my $log = $rule->{log};
2221     if (defined($log) && $log ne 'nolog') {
2222         my $loglevel = $log_level_hash->{$log};
2223         my $logaction = get_log_rule_base($chain, $vmid, $rule->{logmsg}, $loglevel);
2224         push @iptcmds, "-A $chain $matchstr $logaction";
2225     }
2226     push @iptcmds, "-A $chain $matchstr $targetstr";
2227     return @iptcmds;
2228 }
2229
2230 sub ruleset_generate_rule {
2231     my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf, $vmid) = @_;
2232
2233     my $rules;
2234
2235     if ($rule->{macro}) {
2236         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
2237     } else {
2238         $rules = [ $rule ];
2239     }
2240
2241     # update all or nothing
2242     my @ipt_rule_cmds;
2243     foreach my $r (@$rules) {
2244         push @ipt_rule_cmds, ipt_rule_to_cmds($r, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid);
2245     }
2246     foreach my $c (@ipt_rule_cmds) {
2247         ruleset_add_ipt_cmd($ruleset, $chain, $c);
2248     }
2249 }
2250
2251 sub ruleset_create_chain {
2252     my ($ruleset, $chain) = @_;
2253
2254     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
2255     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
2256
2257     die "chain '$chain' already exists\n" if $ruleset->{$chain};
2258
2259     $ruleset->{$chain} = [];
2260 }
2261
2262 sub ruleset_chain_exist {
2263     my ($ruleset, $chain) = @_;
2264
2265     return $ruleset->{$chain} ? 1 : undef;
2266 }
2267
2268 # add an iptables command (like generated by ipt_rule_to_cmds) to a chain
2269 sub ruleset_add_ipt_cmd {
2270    my ($ruleset, $chain, $iptcmd) = @_;
2271
2272    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2273
2274    push @{$ruleset->{$chain}}, $iptcmd;
2275 }
2276
2277 sub ruleset_addrule {
2278     my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
2279
2280     die "no such chain '$chain'\n" if !$ruleset->{$chain};
2281
2282     if ($log) {
2283         my $loglevel = $log_level_hash->{$log};
2284         my $logaction = get_log_rule_base($chain, $vmid, $logmsg, $loglevel);
2285         push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
2286     }
2287     # for stable ebtables digests avoid double-spaces to match ebtables-save output
2288     $match .= ' ' if length($match);
2289     push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
2290 }
2291
2292 sub ruleset_insertrule {
2293    my ($ruleset, $chain, $match, $action, $log) = @_;
2294
2295    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2296
2297    unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2298 }
2299
2300 sub get_log_rule_base {
2301     my ($chain, $vmid, $msg, $loglevel) = @_;
2302
2303     $vmid = 0 if !defined($vmid);
2304     $msg = "" if !defined($msg);
2305
2306     my $rlimit = '';
2307     if (defined($global_log_ratelimit)) {
2308         $rlimit = "-m limit $global_log_ratelimit ";
2309     }
2310
2311     # Note: we use special format for prefix to pass further
2312     # info to log daemon (VMID, LOGLEVEL and CHAIN)
2313     return "${rlimit}-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2314 }
2315
2316 sub ruleset_add_chain_policy {
2317     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2318
2319     if ($policy eq 'ACCEPT') {
2320
2321         my $rule = { action => 'ACCEPT' };
2322         rule_substitude_action($rule, { ACCEPT =>  $accept_action});
2323         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2324
2325     } elsif ($policy eq 'DROP') {
2326
2327         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop");
2328
2329         ruleset_addrule($ruleset, $chain, "", "-j DROP", $loglevel, "policy $policy: ", $vmid);
2330     } elsif ($policy eq 'REJECT') {
2331         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject");
2332
2333         ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject", $loglevel, "policy $policy: ", $vmid);
2334     } else {
2335         # should not happen
2336         die "internal error: unknown policy '$policy'";
2337     }
2338 }
2339
2340 sub ruleset_chain_add_ndp {
2341     my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2342     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2343
2344     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation", $accept);
2345     if ($direction ne 'OUT' || $options->{radv}) {
2346         ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", $accept);
2347     }
2348     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation", $accept);
2349     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement", $accept);
2350 }
2351
2352 sub ruleset_chain_add_conn_filters {
2353     my ($ruleset, $chain, $allow_invalid, $accept) = @_;
2354
2355     if (!$allow_invalid) {
2356         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID", "-j DROP");
2357     }
2358     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED", "-j $accept");
2359 }
2360
2361 sub ruleset_chain_add_input_filters {
2362     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2363
2364     if ($cluster_conf->{ipset}->{blacklist}){
2365         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2366             ruleset_create_chain($ruleset, "PVEFW-blacklist");
2367             ruleset_addrule($ruleset, "PVEFW-blacklist", "", "-j DROP", $loglevel, "DROP: ", 0);
2368         }
2369         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2370         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src", "-j PVEFW-blacklist");
2371     }
2372
2373     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2374         if ($ipversion == 4) {
2375             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW", "-j PVEFW-smurfs");
2376         }
2377     }
2378
2379     if ($options->{tcpflags}) {
2380         ruleset_addrule($ruleset, $chain, "-p tcp", "-j PVEFW-tcpflags");
2381     }
2382 }
2383
2384 sub ruleset_create_vm_chain {
2385     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2386
2387     ruleset_create_chain($ruleset, $chain);
2388     my $accept = generate_nfqueue($options);
2389
2390     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2391         if ($ipversion == 4) {
2392             if ($direction eq 'OUT') {
2393                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2394                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2395                                         proto => 'udp', sport => 68, dport => 67 });
2396             } else {
2397                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2398                                       { action => 'ACCEPT',
2399                                         proto => 'udp', sport => 67, dport => 68 });
2400             }
2401         } elsif ($ipversion == 6) {
2402             if ($direction eq 'OUT') {
2403                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2404                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2405                                         proto => 'udp', sport => 546, dport => 547 });
2406             } else {
2407                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2408                                       { action => 'ACCEPT',
2409                                         proto => 'udp', sport => 547, dport => 546 });
2410             }
2411         }
2412
2413     }
2414
2415     if ($direction eq 'OUT') {
2416         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2417             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr", "-j DROP");
2418         }
2419         if ($ipversion == 6 && !$options->{radv}) {
2420             ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", "-j DROP");
2421         }
2422         if ($ipfilter_ipset) {
2423             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src", "-j DROP");
2424         }
2425         ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2426     }
2427
2428     my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2429     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2430 }
2431
2432 sub ruleset_add_group_rule {
2433     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2434
2435     my $group = $rule->{action};
2436     my $group_chain = "GROUP-$group-$direction";
2437     if(!ruleset_chain_exist($ruleset, $group_chain)){
2438         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2439     }
2440
2441     if ($direction eq 'OUT' && $rule->{iface_out}) {
2442         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out}", "-j $group_chain");
2443     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2444         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in}", "-j $group_chain");
2445     } else {
2446         ruleset_addrule($ruleset, $chain, "", "-j $group_chain");
2447     }
2448
2449     ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON", "-j $action");
2450 }
2451
2452 sub ruleset_generate_vm_rules {
2453     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion, $vmid) = @_;
2454
2455     my $lc_direction = lc($direction);
2456
2457     my $in_accept = generate_nfqueue($options);
2458
2459     foreach my $rule (@$rules) {
2460         next if $rule->{iface} && $rule->{iface} ne $netid;
2461         next if !$rule->{enable} || $rule->{errors};
2462         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2463
2464         if ($rule->{type} eq 'group') {
2465             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2466                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2467         } else {
2468             next if $rule->{type} ne $lc_direction;
2469             eval {
2470                 $rule->{logmsg} = "$rule->{action}: ";
2471                 if ($direction eq 'OUT') {
2472                     rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2473                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2474                 } else {
2475                     rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject" });
2476                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2477                 }
2478             };
2479             warn $@ if $@;
2480         }
2481     }
2482 }
2483
2484 sub generate_nfqueue {
2485     my ($options) = @_;
2486
2487     if ($options->{ips}) {
2488         my $action = "NFQUEUE";
2489         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2490             if (defined($3) && defined($1)) {
2491                 $action .= " --queue-balance $1:$3";
2492             } elsif (defined($1)) {
2493                 $action .= " --queue-num $1";
2494             }
2495         }
2496         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2497         return $action;
2498     } else {
2499         return "ACCEPT";
2500     }
2501 }
2502
2503 sub ruleset_generate_vm_ipsrules {
2504     my ($ruleset, $options, $direction, $iface) = @_;
2505
2506     if ($options->{ips} && $direction eq 'IN') {
2507         my $nfqueue = generate_nfqueue($options);
2508
2509         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2510             ruleset_create_chain($ruleset, "PVEFW-IPS");
2511         }
2512
2513         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged", "-j $nfqueue");
2514     }
2515 }
2516
2517 sub generate_tap_rules_direction {
2518     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2519
2520     my $lc_direction = lc($direction);
2521
2522     my $rules = $vmfw_conf->{rules};
2523
2524     my $options = $vmfw_conf->{options};
2525     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2526
2527     my $tapchain = "$iface-$direction";
2528
2529     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2530     my $ipfilter_ipset;
2531     $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2532         if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2533
2534     if ($options->{enable}) {
2535         # create chain with mac and ip filter
2536         ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2537
2538         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion, $vmid);
2539
2540         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2541
2542         # implement policy
2543         my $policy;
2544
2545         if ($direction eq 'OUT') {
2546             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2547         } else {
2548             $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2549         }
2550
2551         my $accept = generate_nfqueue($options);
2552         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2553         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2554     } else {
2555         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2556         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2557     }
2558
2559     # plug the tap chain to bridge chain
2560     if ($direction eq 'IN') {
2561         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2562                         "-m physdev --physdev-is-bridged --physdev-out $iface", "-j $tapchain");
2563     } else {
2564         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2565                         "-m physdev --physdev-is-bridged --physdev-in $iface", "-j $tapchain");
2566     }
2567 }
2568
2569 sub enable_host_firewall {
2570     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf) = @_;
2571
2572     my $options = $hostfw_conf->{options};
2573     my $cluster_options = $cluster_conf->{options};
2574     my $rules = $hostfw_conf->{rules};
2575     my $cluster_rules = $cluster_conf->{rules};
2576
2577     # corosync preparation
2578     my $corosync_rule = "-p udp --dport 5404:5405";
2579     my $corosync_local_addresses = {};
2580     my $multicast_enabled;
2581     my $local_hostname = PVE::INotify::nodename();
2582     if (defined($corosync_conf)) {
2583         PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2584             my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2585
2586             if ($node_name eq $local_hostname) {
2587                 $corosync_local_addresses->{$key} = $node_ip;
2588             }
2589         });
2590
2591         # allow multicast only if enabled in config
2592         my $corosync_transport = $corosync_conf->{main}->{totem}->{transport};
2593         $multicast_enabled = defined($corosync_transport) && $corosync_transport eq 'udp';
2594     }
2595
2596     # host inbound firewall
2597     my $chain = "PVEFW-HOST-IN";
2598     ruleset_create_chain($ruleset, $chain);
2599
2600     my $loglevel = get_option_log_level($options, "log_level_in");
2601
2602     ruleset_addrule($ruleset, $chain, "-i lo", "-j ACCEPT");
2603
2604     ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2605     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2606     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2607
2608     # we use RETURN because we need to check also tap rules
2609     my $accept_action = 'RETURN';
2610
2611     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2612
2613     # add host rules first, so that cluster wide rules can be overwritten
2614     foreach my $rule (@$rules, @$cluster_rules) {
2615         next if !$rule->{enable} || $rule->{errors};
2616         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2617
2618         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2619
2620         eval {
2621             $rule->{logmsg} = "$rule->{action}: ";
2622             if ($rule->{type} eq 'group') {
2623                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2624             } elsif ($rule->{type} eq 'in') {
2625                 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2626                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2627             }
2628         };
2629         warn $@ if $@;
2630         delete $rule->{iface_in};
2631     }
2632
2633     # allow standard traffic for management ipset (includes cluster network)
2634     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2635     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2636     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006", "-j $accept_action");  # PVE API
2637     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2638     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2639     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22", "-j $accept_action");  # SSH
2640     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 60000:60050", "-j $accept_action");  # Migration
2641
2642     # corosync inbound rules
2643     if (defined($corosync_conf)) {
2644         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action")
2645             if $multicast_enabled;
2646
2647         PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2648             my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2649             my $destination = $corosync_local_addresses->{$key};
2650
2651             if ($node_name ne $local_hostname && defined($destination)) {
2652                 # accept only traffic on same ring
2653                 ruleset_addrule($ruleset, $chain, "-d $destination -s $node_ip $corosync_rule", "-j $accept_action");
2654             }
2655         });
2656     }
2657
2658     # implement input policy
2659     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2660     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2661
2662     # host outbound firewall
2663     $chain = "PVEFW-HOST-OUT";
2664     ruleset_create_chain($ruleset, $chain);
2665
2666     $loglevel = get_option_log_level($options, "log_level_out");
2667
2668     ruleset_addrule($ruleset, $chain, "-o lo", "-j ACCEPT");
2669
2670     ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2671
2672     # we use RETURN because we may want to check other thigs later
2673     $accept_action = 'RETURN';
2674     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2675
2676     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2677
2678     # add host rules first, so that cluster wide rules can be overwritten
2679     foreach my $rule (@$rules, @$cluster_rules) {
2680         next if !$rule->{enable} || $rule->{errors};
2681         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2682
2683         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2684         eval {
2685             $rule->{logmsg} = "$rule->{action}: ";
2686             if ($rule->{type} eq 'group') {
2687                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2688             } elsif ($rule->{type} eq 'out') {
2689                 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2690                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2691             }
2692         };
2693         warn $@ if $@;
2694         delete $rule->{iface_out};
2695     }
2696
2697     # allow standard traffic on cluster network
2698     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2699     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2700
2701     if ($localnet && ($ipversion == $localnet_ver)) {
2702         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006", "-j $accept_action");  # PVE API
2703         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22", "-j $accept_action");  # SSH
2704         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2705         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2706     }
2707
2708     # corosync outbound rules
2709     if (defined($corosync_conf)) {
2710         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action")
2711             if $multicast_enabled;
2712
2713         PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2714             my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2715             my $source = $corosync_local_addresses->{$key};
2716
2717             if ($node_name ne $local_hostname && defined($source)) {
2718                 # accept only traffic on same ring
2719                 ruleset_addrule($ruleset, $chain, "-s $source -d $node_ip $corosync_rule", "-j $accept_action");
2720             }
2721         });
2722     }
2723
2724     # implement output policy
2725     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2726     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2727
2728     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "", "-j PVEFW-HOST-OUT");
2729     ruleset_addrule($ruleset, "PVEFW-INPUT", "", "-j PVEFW-HOST-IN");
2730 }
2731
2732 sub generate_group_rules {
2733     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2734
2735     my $rules = $cluster_conf->{groups}->{$group};
2736
2737     if (!$rules) {
2738         warn "no such security group '$group'\n";
2739         $rules = []; # create empty chain
2740     }
2741
2742     my $chain = "GROUP-${group}-IN";
2743
2744     ruleset_create_chain($ruleset, $chain);
2745     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2746
2747     foreach my $rule (@$rules) {
2748         next if $rule->{type} ne 'in';
2749         next if !$rule->{enable} || $rule->{errors};
2750         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2751         rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2752         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2753     }
2754
2755     $chain = "GROUP-${group}-OUT";
2756
2757     ruleset_create_chain($ruleset, $chain);
2758     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2759
2760     foreach my $rule (@$rules) {
2761         next if $rule->{type} ne 'out';
2762         next if !$rule->{enable} || $rule->{errors};
2763         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2764         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2765         # check also other tap rules later
2766         rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
2767         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2768     }
2769 }
2770
2771 my $MAX_NETS = 32;
2772 my $valid_netdev_names = {};
2773 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2774     $valid_netdev_names->{"net$i"} = 1;
2775 }
2776
2777 sub get_mark_values {
2778     my ($value, $mask) = @_;
2779     $value = hex($value) if $value =~ /^0x/;
2780     $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2781     $mask = 0xffffffff if !defined($mask);
2782     return ($value, $mask);
2783 }
2784
2785 sub parse_fw_rule {
2786     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env) = @_;
2787
2788     my $orig_line = $line;
2789
2790     my $rule = {};
2791
2792     # we can add single line comments to the end of the rule
2793     if ($line =~ s/#\s*(.*?)\s*$//) {
2794         $rule->{comment} = decode('utf8', $1);
2795     }
2796
2797     # we can disable a rule when prefixed with '|'
2798
2799     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2800
2801     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2802         die "unable to parse rule: $line\n";
2803
2804     $rule->{type} = lc($1);
2805     $rule->{action} = $2;
2806
2807     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2808         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2809             $rule->{macro} = $1;
2810             $rule->{action} = $2;
2811         }
2812     }
2813
2814     while (length($line)) {
2815         if ($line =~ s/^-i (\S+)\s*//) {
2816             $rule->{iface} = $1;
2817             next;
2818         }
2819
2820         last if $rule->{type} eq 'group';
2821
2822         if ($line =~ s/^(?:-p|--?proto) (\S+)\s*//) {
2823             $rule->{proto} = $1;
2824             next;
2825         }
2826
2827         if ($line =~ s/^--?dport (\S+)\s*//) {
2828             $rule->{dport} = $1;
2829             next;
2830         }
2831
2832         if ($line =~ s/^--?sport (\S+)\s*//) {
2833             $rule->{sport} = $1;
2834             next;
2835         }
2836         if ($line =~ s/^--?source (\S+)\s*//) {
2837             $rule->{source} = $1;
2838             next;
2839         }
2840         if ($line =~ s/^--?dest (\S+)\s*//) {
2841             $rule->{dest} = $1;
2842             next;
2843         }
2844         if ($line =~ s/^--?log (emerg|alert|crit|err|warning|notice|info|debug|nolog)\s*//) {
2845             $rule->{log} = $1;
2846             next;
2847         }
2848         if ($line =~ s/^--?icmp-type (\S+)\s*//) {
2849             $rule->{'icmp-type'} = $1;
2850             next;
2851         }
2852
2853         last;
2854     }
2855
2856     die "unable to parse rule parameters: $line\n" if length($line);
2857
2858     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2859     if ($rule->{errors}) {
2860         # The verbose flag really means we're running from the CLI and want
2861         # output on the console - in the other case we really want such errors
2862         # to go into the syslog instead.
2863         my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2864         $log->("$prefix - errors in rule parameters: $orig_line\n");
2865         foreach my $p (keys %{$rule->{errors}}) {
2866             $log->("  $p: $rule->{errors}->{$p}\n");
2867         }
2868     }
2869
2870     return $rule;
2871 }
2872
2873 sub verify_ethertype {
2874     my ($value) = @_;
2875     my $types = get_etc_ethertypes();
2876     die "unknown ethernet protocol type: $value\n"
2877         if !defined($types->{byname}->{$value}) &&
2878            !defined($types->{byid}->{$value});
2879 }
2880
2881 sub parse_vmfw_option {
2882     my ($line) = @_;
2883
2884     my ($opt, $value);
2885
2886     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2887
2888     if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2889         $opt = lc($1);
2890         $value = int($2);
2891     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2892         $opt = lc($1);
2893         $value = $2 ? lc($3) : '';
2894     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2895         $opt = lc($1);
2896         $value = uc($3);
2897     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2898         $opt = lc($1);
2899         $value = $2;
2900     } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
2901         $opt = lc($1);
2902         $value = $2;
2903         verify_ethertype($_) foreach split(/\s*,\s*/, $value);
2904     } else {
2905         die "can't parse option '$line'\n"
2906     }
2907
2908     return ($opt, $value);
2909 }
2910
2911 sub parse_hostfw_option {
2912     my ($line) = @_;
2913
2914     my ($opt, $value);
2915
2916     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2917
2918     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid|protection_synflood):\s*(0|1)\s*$/i) {
2919         $opt = lc($1);
2920         $value = int($2);
2921     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2922         $opt = lc($1);
2923         $value = $2 ? lc($3) : '';
2924     } elsif ($line =~ m/^(nf_conntrack_helpers):\s*(((\S+)[,]?)+)\s*$/i) {
2925         $opt = lc($1);
2926         $value = lc($2);
2927         pve_fw_verify_conntrack_helper($value);
2928     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established|nf_conntrack_tcp_timeout_syn_recv|protection_synflood_rate|protection_synflood_burst|protection_limit):\s*(\d+)\s*$/i) {
2929         $opt = lc($1);
2930         $value = int($2);
2931     } else {
2932         die "can't parse option '$line'\n"
2933     }
2934
2935     return ($opt, $value);
2936 }
2937
2938 sub parse_clusterfw_option {
2939     my ($line) = @_;
2940
2941     my ($opt, $value);
2942
2943     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2944         $opt = lc($1);
2945         $value = int($2);
2946         if (($value > 1) && ((time() - $value) > 60)) {
2947             $value = 0
2948         }
2949     } elsif ($line =~ m/^(ebtables):\s*(0|1)\s*$/i) {
2950         $opt = lc($1);
2951         $value = int($2);
2952     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2953         $opt = lc($1);
2954         $value = uc($3);
2955     } elsif ($line =~ m/^(log_ratelimit):\s*(\S+)\s*$/) {
2956         $opt = lc($1);
2957         $value = $2;
2958     } else {
2959         die "can't parse option '$line'\n"
2960     }
2961
2962     return ($opt, $value);
2963 }
2964
2965 sub resolve_alias {
2966     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2967
2968     my $alias = lc($cidr);
2969     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2970     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2971
2972     die "no such alias '$cidr'\n" if !$e;;
2973
2974     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2975 }
2976
2977 sub parse_ip_or_cidr {
2978     my ($cidr) = @_;
2979
2980     my $ipversion;
2981
2982     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2983         $cidr =~ s|/128$||;
2984         $ipversion = 6;
2985     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2986         $cidr =~ s|/32$||;
2987         $ipversion = 4;
2988     } else {
2989         die "value does not look like a valid IP address or CIDR network\n";
2990     }
2991
2992     return wantarray ? ($cidr, $ipversion) : $cidr;
2993 }
2994
2995 sub parse_alias {
2996     my ($line) = @_;
2997
2998     # we can add single line comments to the end of the line
2999     my $comment = $line =~ s/\s*#\s*(.*?)\s*$// ? decode('utf8', $1) : undef;
3000
3001     if ($line =~ m/^(\S+)\s(\S+)$/) {
3002         my ($name, $cidr) = ($1, $2);
3003         my $ipversion;
3004
3005         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
3006
3007         my $data = {
3008             name => $name,
3009             cidr => $cidr,
3010             ipversion => $ipversion,
3011         };
3012         $data->{comment} = $comment  if $comment;
3013         return $data;
3014     }
3015
3016     return undef;
3017 }
3018
3019 sub generic_fw_config_parser {
3020     my ($filename, $cluster_conf, $empty_conf, $rule_env) = @_;
3021
3022     my $section;
3023     my $group;
3024
3025     my $res = $empty_conf;
3026
3027     my $raw;
3028     if ($filename =~ m!^/etc/pve/(.*)$!) {
3029         $raw = PVE::Cluster::get_config($1);
3030     } else {
3031         $raw = eval { PVE::Tools::file_get_contents($filename) }; # ignore errors
3032     }
3033     return {} if !$raw;
3034
3035     my $curr_group_keys = {};
3036
3037     my $linenr = 0;
3038     while ($raw =~ /^\h*(.*?)\h*$/gm) {
3039         my $line = $1;
3040         $linenr++;
3041         next if $line =~ m/^#/;
3042         next if $line =~ m/^\s*$/;
3043         chomp $line;
3044
3045         my $prefix = "$filename (line $linenr)";
3046
3047         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
3048             $section = 'options';
3049             next;
3050         }
3051
3052         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
3053             $section = 'aliases';
3054             next;
3055         }
3056
3057         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
3058             $section = 'groups';
3059             $group = lc($1);
3060             my $comment = $2;
3061             eval {
3062                 die "security group name too long\n" if length($group) > $max_group_name_length;
3063                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
3064             };
3065             if (my $err = $@) {
3066                 ($section, $group, $comment) = undef;
3067                 warn "$prefix: $err";
3068                 next;
3069             }
3070
3071             $res->{$section}->{$group} = [];
3072             $res->{group_comments}->{$group} =  decode('utf8', $comment)
3073                 if $comment;
3074             next;
3075         }
3076
3077         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
3078             $section = 'rules';
3079             next;
3080         }
3081
3082         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
3083             $section = 'ipset';
3084             $group = lc($1);
3085             my $comment = $2;
3086             eval {
3087                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
3088                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
3089             };
3090             if (my $err = $@) {
3091                 ($section, $group, $comment) = undef;
3092                 warn "$prefix: $err";
3093                 next;
3094             }
3095
3096             $res->{$section}->{$group} = [];
3097             $curr_group_keys = {};
3098
3099             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
3100                 if $comment;
3101             next;
3102         }
3103
3104         if (!$section) {
3105             warn "$prefix: skip line - no section\n";
3106             next;
3107         }
3108
3109         if ($section eq 'options') {
3110             eval {
3111                 my ($opt, $value);
3112                 if ($rule_env eq 'cluster') {
3113                     ($opt, $value) = parse_clusterfw_option($line);
3114                 } elsif ($rule_env eq 'host') {
3115                     ($opt, $value) = parse_hostfw_option($line);
3116                 } else {
3117                     ($opt, $value) = parse_vmfw_option($line);
3118                 }
3119                 $res->{options}->{$opt} = $value;
3120             };
3121             warn "$prefix: $@" if $@;
3122         } elsif ($section eq 'aliases') {
3123             eval {
3124                 my $data = parse_alias($line);
3125                 $res->{aliases}->{lc($data->{name})} = $data;
3126             };
3127             warn "$prefix: $@" if $@;
3128         } elsif ($section eq 'rules') {
3129             my $rule;
3130             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env); };
3131             if (my $err = $@) {
3132                 warn "$prefix: $err";
3133                 next;
3134             }
3135             push @{$res->{$section}}, $rule;
3136         } elsif ($section eq 'groups') {
3137             my $rule;
3138             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group'); };
3139             if (my $err = $@) {
3140                 warn "$prefix: $err";
3141                 next;
3142             }
3143             push @{$res->{$section}->{$group}}, $rule;
3144         } elsif ($section eq 'ipset') {
3145             # we can add single line comments to the end of the rule
3146             my $comment = $line =~ s/#\s*(.*?)\s*$// ? decode('utf8', $1) : undef;
3147
3148             $line =~ m/^(\!)?\s*(\S+)\s*$/;
3149             my $nomatch = $1;
3150             my $cidr = $2;
3151             my $errors;
3152
3153             if ($nomatch && !$feature_ipset_nomatch) {
3154                 $errors->{nomatch} = "nomatch not supported by kernel";
3155             }
3156
3157             eval {
3158                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
3159                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
3160                 } else {
3161                     $cidr = parse_ip_or_cidr($cidr);
3162                 }
3163                 die "duplicate ipset entry for '$cidr'\n"
3164                     if defined($curr_group_keys->{$cidr});
3165             };
3166             if (my $err = $@) {
3167                 chomp $err;
3168                 $errors->{cidr} = $err;
3169             }
3170
3171             if ($cidr =~ m!/0+$!) {
3172                 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
3173             }
3174
3175             my $entry = { cidr => $cidr };
3176             $entry->{nomatch} = 1 if $nomatch;
3177             $entry->{comment} = $comment if $comment;
3178             $entry->{errors} =  $errors if $errors;
3179
3180             if ($verbose && $errors) {
3181                 warn "$prefix - errors in ipset '$group': $line\n";
3182                 foreach my $p (keys %{$errors}) {
3183                     warn "  $p: $errors->{$p}\n";
3184                 }
3185             }
3186
3187             push @{$res->{$section}->{$group}}, $entry;
3188             $curr_group_keys->{$cidr} = 1;
3189         } else {
3190             warn "$prefix: skip line - unknown section\n";
3191             next;
3192         }
3193     }
3194
3195     return $res;
3196 }
3197
3198 # this is only used to prevent concurrent runs of rule compilation/application
3199 # see lock_*_conf for cfs locks protectiong config modification
3200 sub run_locked {
3201     my ($code, @param) = @_;
3202
3203     my $timeout = 10;
3204
3205     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
3206
3207     die $@ if $@;
3208
3209     return $res;
3210 }
3211
3212 sub read_local_vm_config {
3213
3214     my $qemu = {};
3215     my $lxc = {};
3216
3217     my $vmdata = { qemu => $qemu, lxc => $lxc };
3218
3219     my $vmlist = PVE::Cluster::get_vmlist();
3220     return $vmdata if !$vmlist || !$vmlist->{ids};
3221     my $ids = $vmlist->{ids};
3222
3223     foreach my $vmid (keys %$ids) {
3224         next if !$vmid; # skip VE0
3225         my $d = $ids->{$vmid};
3226         next if !$d->{node} || $d->{node} ne $nodename;
3227         next if !$d->{type};
3228         if ($d->{type} eq 'qemu') {
3229             if ($have_qemu_server) {
3230                 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
3231                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3232                     $qemu->{$vmid} = $conf;
3233                 }
3234             }
3235         } elsif ($d->{type} eq 'lxc') {
3236             if ($have_lxc) {
3237                 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
3238                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3239                     $lxc->{$vmid} = $conf;
3240                 }
3241             }
3242         }
3243     }
3244
3245     return $vmdata;
3246 };
3247
3248 # FIXME: move use sites over to moved helper and break older packages, then remove this here
3249 sub lock_vmfw_conf {
3250     return PVE::Firewall::Helpers::lock_vmfw_conf(@_);
3251 }
3252
3253 sub load_vmfw_conf {
3254     my ($cluster_conf, $rule_env, $vmid, $dir) = @_;
3255
3256     $dir = $pvefw_conf_dir if !defined($dir);
3257     my $filename = "$dir/$vmid.fw";
3258
3259     my $empty_conf = {
3260         rules => [],
3261         options => {},
3262         aliases => {},
3263         ipset => {} ,
3264         ipset_comments => {},
3265     };
3266
3267     my $vmfw_conf = generic_fw_config_parser($filename, $cluster_conf, $empty_conf, $rule_env);
3268     $vmfw_conf->{vmid} = $vmid;
3269
3270     return $vmfw_conf;
3271 }
3272
3273 my $format_rules = sub {
3274     my ($rules, $allow_iface) = @_;
3275
3276     my $raw = '';
3277
3278     foreach my $rule (@$rules) {
3279         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
3280             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
3281             $raw .= uc($rule->{type});
3282             if ($rule->{macro}) {
3283                 $raw .= " $rule->{macro}($rule->{action})";
3284             } else {
3285                 $raw .= " " . $rule->{action};
3286             }
3287             if ($allow_iface && $rule->{iface}) {
3288                 $raw .= " -i $rule->{iface}";
3289             }
3290
3291             if ($rule->{type} ne  'group')  {
3292                 $raw .= " -source $rule->{source}" if $rule->{source};
3293                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
3294                 $raw .= " -p $rule->{proto}" if $rule->{proto};
3295                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
3296                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
3297                 $raw .= " -log $rule->{log}" if $rule->{log};
3298                 $raw .= " -icmp-type $rule->{'icmp-type'}" if defined($rule->{'icmp-type'}) && $rule->{'icmp-type'} ne '';
3299             }
3300
3301             $raw .= " # " . encode('utf8', $rule->{comment})
3302                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
3303             $raw .= "\n";
3304         } else {
3305             die "unknown rule type '$rule->{type}'";
3306         }
3307     }
3308
3309     return $raw;
3310 };
3311
3312 my $format_options = sub {
3313     my ($options) = @_;
3314
3315     my $raw = '';
3316
3317     $raw .= "[OPTIONS]\n\n";
3318     foreach my $opt (keys %$options) {
3319         $raw .= "$opt: $options->{$opt}\n";
3320     }
3321     $raw .= "\n";
3322
3323     return $raw;
3324 };
3325
3326 my $format_aliases = sub {
3327     my ($aliases) = @_;
3328
3329     my $raw = '';
3330
3331     $raw .= "[ALIASES]\n\n";
3332     foreach my $k (keys %$aliases) {
3333         my $e = $aliases->{$k};
3334         $raw .= "$e->{name} $e->{cidr}";
3335         $raw .= " # " . encode('utf8', $e->{comment})
3336             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
3337         $raw .= "\n";
3338     }
3339     $raw .= "\n";
3340
3341     return $raw;
3342 };
3343
3344 my $format_ipsets = sub {
3345     my ($fw_conf) = @_;
3346
3347     my $raw = '';
3348
3349     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
3350         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
3351             my $utf8comment = encode('utf8', $comment);
3352             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3353         } else {
3354             $raw .= "[IPSET $ipset]\n\n";
3355         }
3356         my $options = $fw_conf->{ipset}->{$ipset};
3357
3358         my $nethash = {};
3359         foreach my $entry (@$options) {
3360             my $cidr = $entry->{cidr};
3361             if (defined($nethash->{$cidr})) {
3362                 warn "ignoring duplicate ipset entry '$cidr'\n";
3363                 next;
3364             }
3365
3366             $nethash->{$cidr} = $entry;
3367         }
3368
3369         foreach my $cidr (sort keys %$nethash) {
3370             my $entry = $nethash->{$cidr};
3371             my $line = $entry->{nomatch} ? '!' : '';
3372             $line .= $entry->{cidr};
3373             $line .= " # " . encode('utf8', $entry->{comment})
3374                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3375             $raw .= "$line\n";
3376         }
3377
3378         $raw .= "\n";
3379     }
3380
3381     return $raw;
3382 };
3383
3384 sub save_vmfw_conf {
3385     my ($vmid, $vmfw_conf) = @_;
3386
3387     my $raw = '';
3388
3389     my $options = $vmfw_conf->{options};
3390     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3391
3392     my $aliases = $vmfw_conf->{aliases};
3393     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3394
3395     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
3396
3397     my $rules = $vmfw_conf->{rules} || [];
3398     if ($rules && scalar(@$rules)) {
3399         $raw .= "[RULES]\n\n";
3400         $raw .= &$format_rules($rules, 1);
3401         $raw .= "\n";
3402     }
3403
3404     my $filename = "$pvefw_conf_dir/$vmid.fw";
3405     if ($raw) {
3406         mkdir $pvefw_conf_dir;
3407         PVE::Tools::file_set_contents($filename, $raw);
3408     } else {
3409         unlink $filename;
3410     }
3411 }
3412
3413 # FIXME: remove with 8.0 and break older qemu-server/pve-container
3414 sub remove_vmfw_conf {
3415     return PVE::Firewall::Helpers::remove_vmfw_conf(@_);
3416 }
3417
3418 # FIXME: remove with 8.0 and break older qemu-server/pve-container
3419 sub clone_vmfw_conf {
3420     return PVE::Firewall::Helpers::clone_vmfw_conf(@_);
3421 }
3422
3423 sub read_vm_firewall_configs {
3424     my ($cluster_conf, $vmdata, $dir) = @_;
3425
3426     my $vmfw_configs = {};
3427
3428     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3429         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir);
3430         next if !$vmfw_conf->{options}; # skip if file does not exist
3431         $vmfw_configs->{$vmid} = $vmfw_conf;
3432     }
3433     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3434         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir);
3435         next if !$vmfw_conf->{options}; # skip if file does not exist
3436         $vmfw_configs->{$vmid} = $vmfw_conf;
3437     }
3438
3439     return $vmfw_configs;
3440 }
3441
3442 sub get_option_log_level {
3443     my ($options, $k) = @_;
3444
3445     my $v = $options->{$k};
3446     $v = $default_log_level if !defined($v);
3447
3448     return undef if $v eq '' || $v eq 'nolog';
3449
3450     return $v if defined($log_level_hash->{$v});
3451
3452     warn "unknown log level ($k = '$v')\n";
3453
3454     return undef;
3455 }
3456
3457 sub generate_std_chains {
3458     my ($ruleset, $options, $ipversion) = @_;
3459
3460     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3461
3462     my $loglevel = get_option_log_level($options, 'smurf_log_level');
3463     my $chain = 'PVEFW-smurflog';
3464     if ( $std_chains->{$chain} ) {
3465         foreach my $r (@{$std_chains->{$chain}}) {
3466           $r->{log} = $loglevel;
3467         }
3468     }
3469
3470     # same as shorewall logflags action.
3471     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
3472     $chain = 'PVEFW-logflags';
3473     if ( $std_chains->{$chain} ) {
3474         foreach my $r (@{$std_chains->{$chain}}) {
3475           $r->{log} = $loglevel;
3476         }
3477     }
3478
3479     foreach my $chain (keys %$std_chains) {
3480         ruleset_create_chain($ruleset, $chain);
3481         foreach my $rule (@{$std_chains->{$chain}}) {
3482             if (ref($rule)) {
3483                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, 0);
3484             } else {
3485                 die "rule $rule as string - should not happen";
3486             }
3487         }
3488     }
3489 }
3490
3491 sub generate_ipset_chains {
3492     my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3493
3494     foreach my $ipset (keys %{$ipsets}) {
3495
3496         my $options = $ipsets->{$ipset};
3497
3498         if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3499             if (my $ips = $device_ips->{$1}) {
3500                 $options = [@$options, @$ips];
3501             }
3502         }
3503
3504         # remove duplicates
3505         my $nethash = {};
3506         foreach my $entry (@$options) {
3507             next if $entry->{errors}; # skip entries with errors
3508             eval {
3509                 my ($cidr, $ver);
3510                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3511                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3512                 } else {
3513                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3514                 }
3515                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3516                 if ($ver == 6) {
3517                     # ip_compress_address takes an address only, no CIDR
3518                     my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3519                     $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3520                     $cidr .= $prefix_len if defined($prefix_len);
3521                     $cidr =~ s|/128$||;
3522                 } else {
3523                     $cidr =~ s|/32$||;
3524                 }
3525
3526                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3527             };
3528             warn $@ if $@;
3529         }
3530
3531         foreach my $ipversion (4, 6) {
3532             my $data = $nethash->{$ipversion};
3533
3534             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3535
3536             my $hashsize = scalar(@$options);
3537             if ($hashsize <= 64) {
3538                 $hashsize = 64;
3539             } else {
3540                 $hashsize = round_powerof2($hashsize);
3541             }
3542
3543             my $bucketsize = 12; # lower than the default of 14, faster but slightly more memory use
3544
3545             my $family = $ipversion == "6" ? "inet6" : "inet";
3546
3547             $ipset_ruleset->{$name} = [
3548                 "create $name hash:net family $family hashsize $hashsize maxelem $hashsize bucketsize $bucketsize"
3549             ];
3550
3551             foreach my $cidr (sort keys %$data) {
3552                 my $entry = $data->{$cidr};
3553
3554                 my $cmd = "add $name $cidr";
3555                 if ($entry->{nomatch}) {
3556                     if ($feature_ipset_nomatch) {
3557                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3558                     } else {
3559                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3560                     }
3561                 } else {
3562                     push @{$ipset_ruleset->{$name}}, $cmd;
3563                 }
3564             }
3565         }
3566     }
3567 }
3568
3569 sub round_powerof2 {
3570     my ($int) = @_;
3571
3572     $int--;
3573     $int |= $int >> $_ foreach (1,2,4,8,16);
3574     return ++$int;
3575 }
3576
3577 my $set_global_log_ratelimit = sub {
3578     my $cluster_opts = shift;
3579
3580     $global_log_ratelimit = '--limit 1/sec';
3581     if (defined(my $log_rlimit = $cluster_opts->{log_ratelimit})) {
3582         my $ll_format = $cluster_option_properties->{log_ratelimit}->{format};
3583         my $limit = PVE::JSONSchema::parse_property_string($ll_format, $log_rlimit);
3584
3585         if ($limit->{enable}) {
3586             if (my $rate = $limit->{rate}) {
3587                 $global_log_ratelimit = "--limit $rate";
3588             }
3589             if (my $burst = $limit->{burst}) {
3590                 $global_log_ratelimit .= " --limit-burst $burst";
3591             }
3592         } else {
3593             $global_log_ratelimit = undef;
3594         }
3595     }
3596 };
3597
3598 sub lock_clusterfw_conf {
3599     my ($timeout, $code, @param) = @_;
3600
3601     my $res = PVE::Cluster::cfs_lock_firewall("cluster", $timeout, $code, @param);
3602     die $@ if $@;
3603
3604     return $res;
3605 }
3606
3607 sub load_clusterfw_conf {
3608     my ($filename) = @_;
3609
3610     $filename = $clusterfw_conf_filename if !defined($filename);
3611     my $empty_conf = {
3612         rules => [],
3613         options => {},
3614         aliases => {},
3615         groups => {},
3616         group_comments => {},
3617         ipset => {} ,
3618         ipset_comments => {},
3619     };
3620
3621     my $cluster_conf = generic_fw_config_parser($filename, $empty_conf, $empty_conf, 'cluster');
3622     $set_global_log_ratelimit->($cluster_conf->{options});
3623
3624     return $cluster_conf;
3625 }
3626
3627 sub save_clusterfw_conf {
3628     my ($cluster_conf) = @_;
3629
3630     my $raw = '';
3631
3632     my $options = $cluster_conf->{options};
3633     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3634
3635     my $aliases = $cluster_conf->{aliases};
3636     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3637
3638     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3639
3640     my $rules = $cluster_conf->{rules};
3641     if ($rules && scalar(@$rules)) {
3642         $raw .= "[RULES]\n\n";
3643         $raw .= &$format_rules($rules, 1);
3644         $raw .= "\n";
3645     }
3646
3647     if ($cluster_conf->{groups}) {
3648         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3649             my $rules = $cluster_conf->{groups}->{$group};
3650             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3651                 my $utf8comment = encode('utf8', $comment);
3652                 $raw .= "[group $group] # $utf8comment\n\n";
3653             } else {
3654                 $raw .= "[group $group]\n\n";
3655             }
3656
3657             $raw .= &$format_rules($rules, 0);
3658             $raw .= "\n";
3659         }
3660     }
3661
3662     if ($raw) {
3663         mkdir $pvefw_conf_dir;
3664         PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3665     } else {
3666         unlink $clusterfw_conf_filename;
3667     }
3668 }
3669
3670 sub lock_hostfw_conf : prototype($$$@) {
3671     my ($node, $timeout, $code, @param) = @_;
3672
3673     $node = $nodename if !defined($node);
3674
3675     my $res = PVE::Cluster::cfs_lock_firewall("host-$node", $timeout, $code, @param);
3676     die $@ if $@;
3677
3678     return $res;
3679 }
3680
3681 sub load_hostfw_conf {
3682     my ($cluster_conf, $filename) = @_;
3683
3684     $filename = $hostfw_conf_filename if !defined($filename);
3685
3686     my $empty_conf = { rules => [], options => {}};
3687     return generic_fw_config_parser($filename, $cluster_conf, $empty_conf, 'host');
3688 }
3689
3690 sub save_hostfw_conf {
3691     my ($hostfw_conf, $filename) = @_;
3692
3693     $filename = $hostfw_conf_filename if !defined($filename);
3694
3695     my $raw = '';
3696
3697     my $options = $hostfw_conf->{options};
3698     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3699
3700     my $rules = $hostfw_conf->{rules};
3701     if ($rules && scalar(@$rules)) {
3702         $raw .= "[RULES]\n\n";
3703         $raw .= &$format_rules($rules, 1);
3704         $raw .= "\n";
3705     }
3706
3707     if ($raw) {
3708         PVE::Tools::file_set_contents($filename, $raw);
3709     } else {
3710         unlink $filename;
3711     }
3712 }
3713
3714 sub compile {
3715     my ($cluster_conf, $hostfw_conf, $vmdata, $corosync_conf) = @_;
3716
3717     my $vmfw_configs;
3718
3719     # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3720     $pve_std_chains = dclone($pve_std_chains_conf);
3721
3722     if ($vmdata) { # test mode
3723         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3724         my $filename = "$testdir/cluster.fw";
3725         $cluster_conf = load_clusterfw_conf($filename);
3726
3727         $filename = "$testdir/host.fw";
3728         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename);
3729
3730         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir);
3731     } else { # normal operation
3732         $cluster_conf = load_clusterfw_conf(undef) if !$cluster_conf;
3733
3734         $hostfw_conf = load_hostfw_conf($cluster_conf, undef) if !$hostfw_conf;
3735
3736         # cfs_update is handled by daemon or API
3737         $corosync_conf = PVE::Cluster::cfs_read_file("corosync.conf")
3738             if !defined($corosync_conf) && PVE::Corosync::check_conf_exists(1);
3739
3740         $vmdata = read_local_vm_config();
3741         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef);
3742     }
3743
3744     return ({},{},{},{}) if !$cluster_conf->{options}->{enable};
3745
3746     my $localnet;
3747     if ($cluster_conf->{aliases}->{local_network}) {
3748         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3749     } else {
3750         my $localnet_ver;
3751         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3752
3753         $cluster_conf->{aliases}->{local_network} = {
3754             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3755     }
3756
3757     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3758
3759     my $ruleset = {};
3760     my $rulesetv6 = {};
3761     $ruleset->{filter} = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3762     $ruleset->{raw} = compile_iptables_raw($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3763     $rulesetv6->{filter} = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
3764     $rulesetv6->{raw} = compile_iptables_raw($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
3765     my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata);
3766     my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3767
3768     return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
3769 }
3770
3771 sub compile_iptables_raw {
3772     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
3773
3774     my $ruleset = {};
3775
3776     my $hostfw_options = $hostfw_conf->{options} || {};
3777     my $protection_synflood = $hostfw_options->{protection_synflood} || 0;
3778     my $conntrack_helpers = $hostfw_options->{nf_conntrack_helpers} || '';
3779
3780     ruleset_create_chain($ruleset, "PVEFW-PREROUTING") if $protection_synflood != 0 || $conntrack_helpers ne '';
3781
3782     if($protection_synflood) {
3783
3784         my $protection_synflood_rate = $hostfw_options->{protection_synflood_rate} ? $hostfw_options->{protection_synflood_rate} : 200;
3785         my $protection_synflood_burst = $hostfw_options->{protection_synflood_burst} ? $hostfw_options->{protection_synflood_burst} : 1000;
3786         my $protection_synflood_limit = $hostfw_options->{protection_synflood_limit} ? $hostfw_options->{protection_synflood_limit} : 3000;
3787         my $protection_synflood_expire = $hostfw_options->{nf_conntrack_tcp_timeout_syn_recv} ? $hostfw_options->{nf_conntrack_tcp_timeout_syn_recv} : 60;
3788         $protection_synflood_expire = $protection_synflood_expire * 1000;
3789         my $protection_synflood_mask = $ipversion == 4 ? 32 : 64;
3790
3791         ruleset_addrule($ruleset, "PVEFW-PREROUTING", "-p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -m hashlimit --hashlimit-above $protection_synflood_rate/sec --hashlimit-burst $protection_synflood_burst --hashlimit-mode srcip --hashlimit-name syn --hashlimit-htable-size 2097152 --hashlimit-srcmask $protection_synflood_mask --hashlimit-htable-expire $protection_synflood_expire", "-j DROP");
3792     }
3793
3794     foreach my $conntrack_helper (split(/,/, $conntrack_helpers)) {
3795         my $helper = $pve_fw_helpers->{$conntrack_helper};
3796         ruleset_addrule($ruleset, "PVEFW-PREROUTING", "-p $helper->{proto} -m $helper->{proto} --dport $helper->{dport} -j CT", "--helper $conntrack_helper") if $helper && $helper->{"v$ipversion"};
3797     }
3798
3799     return $ruleset;
3800 }
3801
3802 sub compile_iptables_filter {
3803     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
3804
3805     my $ruleset = {};
3806
3807     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3808     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3809
3810     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3811
3812     my $hostfw_options = $hostfw_conf->{options} || {};
3813
3814     # fixme: what log level should we use here?
3815     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3816
3817     my $conn_allow_invalid = $hostfw_options->{nf_conntrack_allow_invalid} // 0;
3818     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", $conn_allow_invalid, "ACCEPT");
3819
3820     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3821     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3822
3823     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3824
3825     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3826     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3827
3828     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3829
3830     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3831
3832     if ($hostfw_enable) {
3833         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf); };
3834         warn $@ if $@; # just to be sure - should not happen
3835     }
3836
3837     # generate firewall rules for QEMU VMs
3838     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3839         eval {
3840             my $conf = $vmdata->{qemu}->{$vmid};
3841             my $vmfw_conf = $vmfw_configs->{$vmid};
3842             return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3843
3844             foreach my $netid (sort keys %$conf) {
3845                 next if $netid !~ m/^net(\d+)$/;
3846                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3847                 next if !$net->{firewall};
3848
3849                 my $iface = "tap${vmid}i$1";
3850                 my $macaddr = $net->{macaddr};
3851                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3852                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3853                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3854                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3855             }
3856         };
3857         warn $@ if $@; # just to be sure - should not happen
3858     }
3859
3860     # generate firewall rules for LXC containers
3861     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3862         eval {
3863             my $conf = $vmdata->{lxc}->{$vmid};
3864             my $vmfw_conf = $vmfw_configs->{$vmid};
3865             return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3866
3867             foreach my $netid (sort keys %$conf) {
3868                 next if $netid !~ m/^net(\d+)$/;
3869                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3870                 next if !$net->{firewall};
3871
3872                 my $iface = "veth${vmid}i$1";
3873                 my $macaddr = $net->{hwaddr};
3874                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3875                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3876                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3877                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3878             }
3879         };
3880         warn $@ if $@; # just to be sure - should not happen
3881     }
3882
3883     if (ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3884         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3885     }
3886
3887     return $ruleset;
3888 }
3889
3890 sub mac_to_linklocal {
3891     my ($macaddr) = @_;
3892     my @parts = split(/:/, $macaddr);
3893     # The standard link local address uses the fe80::/64 prefix with the
3894     # modified EUI-64 identifier derived from the MAC address by flipping the
3895     # universal/local bit and inserting FF:FE in the middle.
3896     # See RFC 4291.
3897     $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3898     my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3899     return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3900 }
3901
3902 sub compile_ipsets {
3903     my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3904
3905     my $localnet;
3906     if ($cluster_conf->{aliases}->{local_network}) {
3907         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3908     } else {
3909         my $localnet_ver;
3910         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3911
3912         $cluster_conf->{aliases}->{local_network} = {
3913             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3914     }
3915
3916     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3917
3918
3919     my $ipset_ruleset = {};
3920
3921     # generate ipsets for QEMU VMs
3922     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3923         eval {
3924             my $conf = $vmdata->{qemu}->{$vmid};
3925             my $vmfw_conf = $vmfw_configs->{$vmid};
3926             return if !$vmfw_conf;
3927
3928             # When the 'ipfilter' option is enabled every device for which there
3929             # is no 'ipfilter-netX' ipset defined gets an implicit empty default
3930             # ipset.
3931             # The reason is that ipfilter ipsets are always filled with standard
3932             # IPv6 link-local filters.
3933             my $ipsets = $vmfw_conf->{ipset};
3934             my $implicit_sets = {};
3935
3936             my $device_ips = {};
3937             foreach my $netid (keys %$conf) {
3938                 next if $netid !~ m/^net(\d+)$/;
3939                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3940                 next if !$net->{firewall};
3941
3942                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3943                     $implicit_sets->{"ipfilter-$netid"} = [];
3944                 }
3945
3946                 my $macaddr = $net->{macaddr};
3947                 my $linklocal = mac_to_linklocal($macaddr);
3948                 $device_ips->{$netid} = [
3949                     { cidr => $linklocal },
3950                     { cidr => 'fe80::/10', nomatch => 1 }
3951                 ];
3952             }
3953
3954             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3955             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3956         };
3957         warn $@ if $@; # just to be sure - should not happen
3958     }
3959
3960     # generate firewall rules for LXC containers
3961     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3962         eval {
3963             my $conf = $vmdata->{lxc}->{$vmid};
3964             my $vmfw_conf = $vmfw_configs->{$vmid};
3965             return if !$vmfw_conf;
3966
3967             # When the 'ipfilter' option is enabled every device for which there
3968             # is no 'ipfilter-netX' ipset defined gets an implicit empty default
3969             # ipset.
3970             # The reason is that ipfilter ipsets are always filled with standard
3971             # IPv6 link-local filters, as well as the IP addresses configured
3972             # for the container.
3973             my $ipsets = $vmfw_conf->{ipset};
3974             my $implicit_sets = {};
3975
3976             my $device_ips = {};
3977             foreach my $netid (keys %$conf) {
3978                 next if $netid !~ m/^net(\d+)$/;
3979                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3980                 next if !$net->{firewall};
3981
3982                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3983                     $implicit_sets->{"ipfilter-$netid"} = [];
3984                 }
3985
3986                 my $macaddr = $net->{hwaddr};
3987                 my $linklocal = mac_to_linklocal($macaddr);
3988                 my $set = $device_ips->{$netid} = [
3989                     { cidr => $linklocal },
3990                     { cidr => 'fe80::/10', nomatch => 1 }
3991                 ];
3992                 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3993                     push @$set, { cidr => $1 };
3994                 }
3995                 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3996                     push @$set, { cidr => $1 };
3997                 }
3998             }
3999
4000             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
4001             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
4002         };
4003         warn $@ if $@; # just to be sure - should not happen
4004     }
4005
4006     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
4007
4008     return $ipset_ruleset;
4009 }
4010
4011 sub compile_ebtables_filter {
4012     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata) = @_;
4013
4014     if (!($cluster_conf->{options}->{ebtables} // 1)) {
4015         return {};
4016     }
4017
4018     my $ruleset = {};
4019
4020     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
4021
4022     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
4023     #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED', to speedup rules
4024     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv4', '-j ACCEPT');
4025     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv6', '-j ACCEPT');
4026     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-o fwln+', '-j PVEFW-FWBR-OUT');
4027
4028     # generate firewall rules for QEMU VMs
4029     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
4030         eval {
4031             my $conf = $vmdata->{qemu}->{$vmid};
4032             my $vmfw_conf = $vmfw_configs->{$vmid};
4033             return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
4034             my $ipsets = $vmfw_conf->{ipset};
4035
4036             foreach my $netid (sort keys %$conf) {
4037                 next if $netid !~ m/^net(\d+)$/;
4038                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
4039                 next if !$net->{firewall};
4040                 my $iface = "tap${vmid}i$1";
4041                 my $macaddr = $net->{macaddr};
4042                 my $arpfilter = [];
4043                 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
4044                     foreach my $ipaddr (@$ipset) {
4045                         my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
4046                         next if !$ip || ($version && $version != 4);
4047                         push(@$arpfilter, $ip);
4048                     }
4049                 }
4050                 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
4051             }
4052         };
4053         warn $@ if $@; # just to be sure - should not happen
4054     }
4055
4056     # generate firewall rules for LXC containers
4057     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
4058         eval {
4059             my $conf = $vmdata->{lxc}->{$vmid};
4060
4061             my $vmfw_conf = $vmfw_configs->{$vmid};
4062             return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
4063             my $ipsets = $vmfw_conf->{ipset};
4064
4065             foreach my $netid (sort keys %$conf) {
4066                 next if $netid !~ m/^net(\d+)$/;
4067                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
4068                 next if !$net->{firewall};
4069                 my $iface = "veth${vmid}i$1";
4070                 my $macaddr = $net->{hwaddr};
4071                 my $arpfilter = [];
4072                 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
4073                     foreach my $ipaddr (@$ipset) {
4074                         my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
4075                         next if !$ip || ($version && $version != 4);
4076                         push(@$arpfilter, $ip);
4077                     }
4078                 }
4079                 if (defined(my $ip = $net->{ip}) && $vmfw_conf->{options}->{ipfilter}) {
4080                     # ebtables changes this to a .0/MASK network but we just
4081                     # want the address here, no network - see #2193
4082                     $ip =~ s|/(\d+)$||;
4083                     if ($ip ne 'dhcp') {
4084                         push @$arpfilter, $ip;
4085                     }
4086                 }
4087                 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
4088             }
4089         };
4090         warn $@ if $@; # just to be sure - should not happen
4091     }
4092
4093     return $ruleset;
4094 }
4095
4096 sub generate_tap_layer2filter {
4097     my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter) = @_;
4098     my $options = $vmfw_conf->{options};
4099
4100     my $tapchain = $iface."-OUT";
4101
4102     # ebtables remove zeros from mac pairs
4103     $macaddr =~ s/0([0-9a-f])/$1/ig;
4104     $macaddr = lc($macaddr);
4105
4106     ruleset_create_chain($ruleset, $tapchain);
4107
4108     if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
4109         ruleset_addrule($ruleset, $tapchain, "-s ! $macaddr", '-j DROP');
4110     }
4111
4112     if (@$arpfilter){
4113         my $arpchain = $tapchain."-ARP";
4114         ruleset_addrule($ruleset, $tapchain, "-p ARP", "-j $arpchain");
4115         ruleset_create_chain($ruleset, $arpchain);
4116
4117         foreach my $ip (@{$arpfilter}) {
4118             ruleset_addrule($ruleset, $arpchain, "-p ARP --arp-ip-src $ip", '-j RETURN');
4119         }
4120         ruleset_addrule($ruleset, $arpchain, '', '-j DROP');
4121     }
4122
4123     if (defined($options->{layer2_protocols})){
4124         my $protochain = $tapchain."-PROTO";
4125         ruleset_addrule($ruleset, $tapchain, '', "-j $protochain");
4126         ruleset_create_chain($ruleset, $protochain);
4127
4128         foreach my $proto (split(/,/, $options->{layer2_protocols})) {
4129             ruleset_addrule($ruleset, $protochain, "-p $proto", '-j RETURN');
4130         }
4131         ruleset_addrule($ruleset, $protochain, '', '-j DROP');
4132     }
4133
4134     ruleset_addrule($ruleset, $tapchain, '', '-j ACCEPT');
4135
4136     ruleset_addrule($ruleset, 'PVEFW-FWBR-OUT', "-i $iface", "-j $tapchain");
4137 }
4138
4139 # the parameter $change_only_regex changes two things if defined:
4140 # * all chains not matching it will be left intact
4141 # * both the $active_chains hash and the returned status_hash have different
4142 #   structure (they contain a key named 'rules').
4143 sub get_ruleset_status {
4144     my ($ruleset, $active_chains, $digest_fn, $change_only_regex) = @_;
4145
4146     my $statushash = {};
4147
4148     foreach my $chain (sort keys %$ruleset) {
4149         my $rules = $ruleset->{$chain};
4150         my $sig = &$digest_fn($rules);
4151         my $oldsig;
4152
4153         $statushash->{$chain}->{sig} = $sig;
4154         if (defined($change_only_regex)) {
4155             $oldsig = $active_chains->{$chain}->{sig};
4156             $statushash->{$chain}->{rules} = $rules;
4157         } else {
4158             $oldsig = $active_chains->{$chain};
4159         }
4160         if (!defined($oldsig)) {
4161             $statushash->{$chain}->{action} = 'create';
4162         } else {
4163             if ($oldsig eq $sig) {
4164                 $statushash->{$chain}->{action} = 'exists';
4165             } else {
4166                 $statushash->{$chain}->{action} = 'update';
4167             }
4168         }
4169         if ($verbose) {
4170             print "$statushash->{$chain}->{action} $chain ($sig)\n";
4171             foreach my $cmd (@{$rules}) {
4172                 print "\t$cmd\n";
4173             }
4174         }
4175     }
4176
4177     foreach my $chain (sort keys %$active_chains) {
4178         next if defined($ruleset->{$chain});
4179         my $action = 'delete';
4180         my $sig = $active_chains->{$chain};
4181         if (defined($change_only_regex)) {
4182             $action = 'ignore' if ($chain !~ m/$change_only_regex/);
4183             $statushash->{$chain}->{rules} = $active_chains->{$chain}->{rules};
4184             $statushash->{$chain}->{policy} = $active_chains->{$chain}->{policy};
4185             $sig = $sig->{sig};
4186         }
4187         $statushash->{$chain}->{action} = $action;
4188         $statushash->{$chain}->{sig} = $sig;
4189         print "$action $chain ($sig)\n" if $verbose;
4190     }
4191
4192     return $statushash;
4193 }
4194
4195 sub print_sig_rule {
4196     my ($chain, $sig) = @_;
4197
4198     # We just use this to store a SHA1 checksum used to detect changes
4199     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
4200 }
4201
4202 sub get_ruleset_cmdlist {
4203     my ($ruleset, $iptablescmd, $table) = @_;
4204
4205     $table = 'filter' if !$table;
4206
4207     my $cmdlist = "*$table\n"; # we pass this to iptables-restore;
4208
4209     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd, $table);
4210     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
4211
4212     # create missing chains first
4213     foreach my $chain (sort keys %$ruleset) {
4214         my $stat = $statushash->{$chain};
4215         die "internal error" if !$stat;
4216         next if $stat->{action} ne 'create';
4217
4218         $cmdlist .= ":$chain - [0:0]\n";
4219     }
4220
4221     foreach my $h (qw(INPUT OUTPUT FORWARD PREROUTING)) {
4222         my $chain = "PVEFW-$h";
4223         if ($ruleset->{$chain} && !$hooks->{$h}) {
4224             $cmdlist .= "-A $h -j $chain\n";
4225         }
4226     }
4227
4228     foreach my $chain (sort keys %$ruleset) {
4229         my $stat = $statushash->{$chain};
4230         die "internal error" if !$stat;
4231
4232         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
4233             $cmdlist .= "-F $chain\n";
4234             foreach my $cmd (@{$ruleset->{$chain}}) {
4235                 $cmdlist .= "$cmd\n";
4236             }
4237             $cmdlist .= print_sig_rule($chain, $stat->{sig});
4238         } elsif ($stat->{action} eq 'delete') {
4239             die "internal error"; # this should not happen
4240         } elsif ($stat->{action} eq 'exists') {
4241             # do nothing
4242         } else {
4243             die "internal error - unknown status '$stat->{action}'";
4244         }
4245     }
4246
4247     foreach my $chain (keys %$statushash) {
4248         next if $statushash->{$chain}->{action} ne 'delete';
4249         $cmdlist .= "-F $chain\n";
4250     }
4251     foreach my $chain (keys %$statushash) {
4252         next if $statushash->{$chain}->{action} ne 'delete';
4253         next if $chain eq 'PVEFW-INPUT';
4254         next if $chain eq 'PVEFW-OUTPUT';
4255         next if $chain eq 'PVEFW-FORWARD';
4256         next if $chain eq 'PVEFW-PREROUTING';
4257         $cmdlist .= "-X $chain\n";
4258     }
4259
4260     my $changes = $cmdlist ne "*$table\n" ? 1 : 0;
4261
4262     $cmdlist .= "COMMIT\n";
4263
4264     return wantarray ? ($cmdlist, $changes) : $cmdlist;
4265 }
4266
4267 my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tap|veth)\d+i\d+-(?:IN|OUT)/;
4268
4269 sub get_ebtables_cmdlist {
4270     my ($ruleset) = @_;
4271
4272     my $changes = 0;
4273     my $cmdlist = "*filter\n";
4274
4275     my $active_chains = ebtables_get_chains();
4276     my $statushash = get_ruleset_status($ruleset, $active_chains,
4277                                         \&iptables_chain_digest,
4278                                         $pve_ebtables_chainname_regex);
4279
4280     # create chains first and make sure PVE rules are evaluated if active
4281     my $append_pve_to_forward = '-A FORWARD -j PVEFW-FORWARD';
4282     my $pve_include = 0;
4283     foreach my $chain (sort keys %$statushash) {
4284         next if ($statushash->{$chain}->{action} eq 'delete');
4285         my $policy = $statushash->{$chain}->{policy} // 'ACCEPT';
4286         $cmdlist .= ":$chain $policy\n";
4287         $pve_include = 1 if ($chain eq 'PVEFW-FORWARD');
4288     }
4289
4290     foreach my $chain (sort keys %$statushash) {
4291         my $stat = $statushash->{$chain};
4292         $changes = 1 if ($stat->{action} !~ 'ignore|exists');
4293         next if ($stat->{action} eq 'delete');
4294
4295         foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
4296             if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
4297                 next if ! $pve_include;
4298                 $pve_include = 0;
4299             }
4300             $cmdlist .= "$cmd\n";
4301         }
4302     }
4303     $cmdlist .= "$append_pve_to_forward\n" if $pve_include;
4304
4305     return wantarray ? ($cmdlist, $changes) : $cmdlist;
4306 }
4307
4308 sub get_ipset_cmdlist {
4309     my ($ruleset) = @_;
4310
4311     my $cmdlist = "";
4312
4313     my $delete_cmdlist = "";
4314
4315     my $active_chains = ipset_get_chains();
4316     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest);
4317
4318     # remove stale _swap chains
4319     foreach my $chain (keys %$active_chains) {
4320         if ($chain =~ m/^PVEFW-\S+_swap$/) {
4321             $cmdlist .= "destroy $chain\n";
4322         }
4323     }
4324
4325     foreach my $chain (keys %$ruleset) {
4326         my $stat = $statushash->{$chain};
4327         die "internal error" if !$stat;
4328
4329         if ($stat->{action} eq 'create') {
4330             foreach my $cmd (@{$ruleset->{$chain}}) {
4331                 $cmdlist .= "$cmd\n";
4332             }
4333         }
4334     }
4335
4336     foreach my $chain (keys %$ruleset) {
4337         my $stat = $statushash->{$chain};
4338         die "internal error" if !$stat;
4339
4340         if ($stat->{action} eq 'update') {
4341             my $chain_swap = $chain."_swap";
4342
4343             foreach my $cmd (@{$ruleset->{$chain}}) {
4344                 $cmd =~ s/$chain/$chain_swap/;
4345                 $cmdlist .= "$cmd\n";
4346             }
4347             $cmdlist .= "swap $chain_swap $chain\n";
4348             $cmdlist .= "flush $chain_swap\n";
4349             $cmdlist .= "destroy $chain_swap\n";
4350         }
4351     }
4352
4353      # the remove unused chains
4354     foreach my $chain (keys %$statushash) {
4355         next if $statushash->{$chain}->{action} ne 'delete';
4356
4357         $delete_cmdlist .= "flush $chain\n";
4358         $delete_cmdlist .= "destroy $chain\n";
4359     }
4360
4361     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
4362
4363     return ($cmdlist, $delete_cmdlist, $changes);
4364 }
4365
4366 sub apply_ruleset {
4367     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = @_;
4368
4369     enable_bridge_firewall();
4370
4371     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
4372         get_ipset_cmdlist($ipset_ruleset);
4373
4374     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset->{filter});
4375     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6->{filter}, "ip6tables");
4376     my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist($ebtables_ruleset);
4377     my ($cmdlist_raw, $changes_raw) = get_ruleset_cmdlist($ruleset->{raw}, undef, 'raw');
4378     my ($cmdlistv6_raw, $changesv6_raw) = get_ruleset_cmdlist($rulesetv6->{raw}, "ip6tables", 'raw');
4379
4380     if ($verbose) {
4381         if ($ipset_changes) {
4382             print "ipset changes:\n";
4383             print $ipset_create_cmdlist if $ipset_create_cmdlist;
4384             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
4385         }
4386
4387         if ($changes) {
4388             print "iptables changes:\n";
4389             print $cmdlist;
4390         }
4391
4392         if ($changesv6) {
4393             print "ip6tables changes:\n";
4394             print $cmdlistv6;
4395         }
4396
4397         if ($changes_raw) {
4398             print "iptables table raw changes:\n";
4399             print $cmdlist_raw;
4400         }
4401
4402         if ($changesv6_raw) {
4403             print "ip6tables table raw changes:\n";
4404             print $cmdlistv6_raw;
4405         }
4406
4407         if ($ebtables_changes) {
4408             print "ebtables changes:\n";
4409             print $ebtables_cmdlist;
4410         }
4411     }
4412
4413     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
4414     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
4415
4416     ipset_restore_cmdlist($ipset_create_cmdlist);
4417
4418     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
4419     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
4420
4421     iptables_restore_cmdlist($cmdlist);
4422
4423     $tmpfile = "$pve_fw_status_dir/ip4cmdlistraw";
4424     PVE::Tools::file_set_contents($tmpfile, $cmdlist_raw || '');
4425
4426     iptables_restore_cmdlist($cmdlist_raw, 'raw');
4427
4428     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
4429     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
4430
4431     ip6tables_restore_cmdlist($cmdlistv6);
4432
4433     $tmpfile = "$pve_fw_status_dir/ip6cmdlistraw";
4434     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6_raw || '');
4435
4436     ip6tables_restore_cmdlist($cmdlistv6_raw, 'raw');
4437
4438     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
4439     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
4440
4441     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
4442
4443     ebtables_restore_cmdlist($ebtables_cmdlist);
4444
4445     $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
4446     PVE::Tools::file_set_contents($tmpfile, $ebtables_cmdlist || '');
4447
4448     # test: re-read status and check if everything is up to date
4449     my $ruleset_filter = $ruleset->{filter};
4450     my $active_chains = iptables_get_chains();
4451     my $statushash = get_ruleset_status($ruleset_filter, $active_chains, \&iptables_chain_digest);
4452
4453     my $errors;
4454     foreach my $chain (sort keys %$ruleset_filter) {
4455         my $stat = $statushash->{$chain};
4456         if ($stat->{action} ne 'exists') {
4457             warn "unable to update chain '$chain'\n";
4458             $errors = 1;
4459         }
4460     }
4461
4462     my $rulesetv6_filter = $rulesetv6->{filter};
4463     my $active_chainsv6 = iptables_get_chains("ip6tables");
4464     my $statushashv6 = get_ruleset_status($rulesetv6_filter, $active_chainsv6, \&iptables_chain_digest);
4465
4466     foreach my $chain (sort keys %$rulesetv6_filter) {
4467         my $stat = $statushashv6->{$chain};
4468         if ($stat->{action} ne 'exists') {
4469             warn "unable to update chain '$chain'\n";
4470             $errors = 1;
4471         }
4472     }
4473
4474     my $ruleset_raw = $ruleset->{raw};
4475     my $active_chains_raw = iptables_get_chains(undef, 'raw');
4476     my $statushash_raw = get_ruleset_status($ruleset_raw, $active_chains_raw, \&iptables_chain_digest);
4477
4478     foreach my $chain (sort keys %$ruleset_raw) {
4479         my $stat = $statushash_raw->{$chain};
4480         if ($stat->{action} ne 'exists') {
4481             warn "unable to update chain '$chain'\n";
4482             $errors = 1;
4483         }
4484     }
4485
4486     my $rulesetv6_raw = $rulesetv6->{raw};
4487     my $active_chainsv6_raw = iptables_get_chains("ip6tables", 'raw');
4488     my $statushashv6_raw = get_ruleset_status($rulesetv6_raw, $active_chainsv6_raw, \&iptables_chain_digest);
4489
4490     foreach my $chain (sort keys %$rulesetv6_raw) {
4491         my $stat = $statushashv6_raw->{$chain};
4492         if ($stat->{action} ne 'exists') {
4493             warn "unable to update chain '$chain'\n";
4494             $errors = 1;
4495         }
4496     }
4497
4498     my $active_ebtables_chains = ebtables_get_chains();
4499     my $ebtables_statushash = get_ruleset_status($ebtables_ruleset,
4500                                 $active_ebtables_chains, \&iptables_chain_digest,
4501                                 $pve_ebtables_chainname_regex);
4502
4503     foreach my $chain (sort keys %$ebtables_ruleset) {
4504         my $stat = $ebtables_statushash->{$chain};
4505         if ($stat->{action} ne 'exists') {
4506             warn "ebtables : unable to update chain '$chain'\n";
4507             $errors = 1;
4508         }
4509     }
4510
4511     die "unable to apply firewall changes\n" if $errors;
4512
4513     update_nf_conntrack_max($hostfw_conf);
4514
4515     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
4516
4517     update_nf_conntrack_tcp_timeout_syn_recv($hostfw_conf);
4518
4519     update_nf_conntrack_logging($hostfw_conf);
4520 }
4521
4522 sub update_nf_conntrack_max {
4523     my ($hostfw_conf) = @_;
4524
4525     my $max = 262144; # reasonable default (2^16 * 4), see nf_conntrack-sysctl docs
4526
4527     my $options = $hostfw_conf->{options} || {};
4528
4529     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
4530         $max = $options->{nf_conntrack_max};
4531         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
4532     }
4533
4534     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
4535     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
4536
4537     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
4538
4539     if ($current != $max) {
4540         my $hashsize = int($max/4);
4541         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
4542         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
4543     }
4544 }
4545
4546 sub update_nf_conntrack_tcp_timeout_established {
4547     my ($hostfw_conf) = @_;
4548
4549     my $options = $hostfw_conf->{options} || {};
4550
4551     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
4552
4553     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
4554 }
4555
4556 sub update_nf_conntrack_tcp_timeout_syn_recv {
4557     my ($hostfw_conf) = @_;
4558
4559     my $options = $hostfw_conf->{options} || {};
4560
4561     my $value = defined($options->{nf_conntrack_tcp_timeout_syn_recv}) ? $options->{nf_conntrack_tcp_timeout_syn_recev} : 60;
4562
4563     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_syn_recv", $value);
4564 }
4565
4566 my $log_nf_conntrack_enabled = undef;
4567 sub update_nf_conntrack_logging {
4568     my ($hostfw_conf) = @_;
4569
4570     my $options = $hostfw_conf->{options} || {};
4571     my $value = $options->{log_nf_conntrack} || 0;
4572     if (!defined($log_nf_conntrack_enabled)
4573         || $value != $log_nf_conntrack_enabled)
4574     {
4575         my $tmpfile = "$pve_fw_status_dir/log_nf_conntrack";
4576         PVE::Tools::file_set_contents($tmpfile, $value);
4577
4578         run_command([qw(systemctl try-reload-or-restart pvefw-logger.service)]);
4579         $log_nf_conntrack_enabled = $value;
4580     }
4581 }
4582
4583 sub remove_pvefw_chains {
4584
4585     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
4586     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
4587     PVE::Firewall::remove_pvefw_chains_iptables("iptables", "raw");
4588     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables", "raw");
4589     PVE::Firewall::remove_pvefw_chains_ipset();
4590     PVE::Firewall::remove_pvefw_chains_ebtables();
4591
4592 }
4593
4594 sub remove_pvefw_chains_iptables {
4595     my ($iptablescmd, $table) = @_;
4596
4597     $table = 'filter' if !$table;
4598
4599     my ($chash, $hooks) = iptables_get_chains($iptablescmd, $table);
4600     my $cmdlist = "*$table\n";
4601
4602     foreach my $h (qw(INPUT OUTPUT FORWARD PREROUTING)) {
4603         if ($hooks->{$h}) {
4604             $cmdlist .= "-D $h -j PVEFW-$h\n";
4605         }
4606     }
4607
4608     foreach my $chain (keys %$chash) {
4609         $cmdlist .= "-F $chain\n";
4610     }
4611
4612     foreach my $chain (keys %$chash) {
4613         $cmdlist .= "-X $chain\n";
4614     }
4615     $cmdlist .= "COMMIT\n";
4616
4617     if($iptablescmd eq "ip6tables") {
4618         ip6tables_restore_cmdlist($cmdlist, $table);
4619     } else {
4620         iptables_restore_cmdlist($cmdlist, $table);
4621     }
4622 }
4623
4624 sub remove_pvefw_chains_ipset {
4625
4626     my $ipset_chains = ipset_get_chains();
4627
4628     my $cmdlist = "";
4629
4630     foreach my $chain (keys %$ipset_chains) {
4631         $cmdlist .= "flush $chain\n";
4632         $cmdlist .= "destroy $chain\n";
4633     }
4634
4635     ipset_restore_cmdlist($cmdlist) if $cmdlist;
4636 }
4637
4638 sub remove_pvefw_chains_ebtables {
4639     # apply empty ruleset = remove all our chains
4640     ebtables_restore_cmdlist(get_ebtables_cmdlist({}));
4641 }
4642
4643 sub init {
4644     my $cluster_conf = load_clusterfw_conf();
4645     my $cluster_options = $cluster_conf->{options};
4646     my $enable = $cluster_options->{enable};
4647
4648     return if !$enable;
4649
4650     # load required modules here
4651 }
4652
4653 sub update {
4654     my $code = sub {
4655
4656         my $cluster_conf = load_clusterfw_conf();
4657         my $cluster_options = $cluster_conf->{options};
4658
4659         if (!$cluster_options->{enable}) {
4660             PVE::Firewall::remove_pvefw_chains();
4661             return;
4662         }
4663
4664         my $hostfw_conf = load_hostfw_conf($cluster_conf);
4665
4666         my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile($cluster_conf, $hostfw_conf);
4667
4668         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
4669     };
4670
4671     run_locked($code);
4672 }
4673
4674 1;