src/PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5 use POSIX;
   6 use Data::Dumper;
   7 use Digest::SHA;
   8 use Socket qw(AF_INET6 inet_ntop inet_pton);
   9 use PVE::INotify;
  10 use PVE::Exception qw(raise raise_param_exc);
  11 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  12 use PVE::Cluster;
  13 use PVE::ProcFSTools;
  14 use PVE::Tools qw($IPV4RE $IPV6RE);
  15 use File::Basename;
  16 use File::Path;
  17 use IO::File;
  18 use Net::IP;
  19 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  20 use Encode;
  21
  22 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  23 my $pvefw_conf_dir = "/etc/pve/firewall";
  24 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
  25
  26 # dynamically include PVE::QemuServer and PVE::OpenVZ
  27 # to avoid dependency problems
  28 my $have_qemu_server;
  29 eval {
  30     require PVE::QemuServer;
  31     $have_qemu_server = 1;
  32 };
  33
  34 my $have_pve_manager;
  35 eval {
  36     require PVE::OpenVZ;
  37     $have_pve_manager = 1;
  38 };
  39
  40 my $pve_fw_status_dir = "/var/lib/pve-firewall";
  41
  42 mkdir $pve_fw_status_dir; # make sure this exists
  43
  44 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  45 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  46 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  47
  48 my $max_alias_name_length = 64;
  49 my $max_ipset_name_length = 64;
  50 my $max_group_name_length = 20;
  51
  52 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
  53 sub pve_verify_ip_or_cidr {
  54     my ($cidr, $noerr) = @_;
  55
  56     if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
  57         return $cidr if Net::IP->new($cidr);
  58         return undef if $noerr;
  59         die Net::IP::Error() . "\n";
  60     }
  61     return undef if $noerr;
  62     die "value does not look like a valid IP address or CIDR network\n";
  63 }
  64
  65 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
  66 sub pve_verify_ip_or_cidr_or_alias {
  67     my ($cidr, $noerr) = @_;
  68
  69     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  70
  71     return pve_verify_ip_or_cidr($cidr, $noerr);
  72 }
  73
  74 PVE::JSONSchema::register_standard_option('ipset-name', {
  75     description => "IP set name.",
  76     type => 'string',
  77     pattern => $ipset_name_pattern,
  78     minLength => 2,
  79     maxLength => $max_ipset_name_length,
  80 });
  81
  82 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  83     description => "Alias name.",
  84     type => 'string',
  85     pattern => $ip_alias_pattern,
  86     minLength => 2,
  87     maxLength => $max_alias_name_length,
  88 });
  89
  90 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  91     description => "Log level.",
  92     type => 'string',
  93     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  94     optional => 1,
  95 });
  96
  97 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
  98     description => "Security Group name.",
  99     type => 'string',
 100     pattern => $security_group_name_pattern,
 101     minLength => 2,
 102     maxLength => $max_group_name_length,
 103 });
 104
 105 my $feature_ipset_nomatch = 0;
 106 eval  {
 107     my (undef, undef, $release) = POSIX::uname();
 108     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 109         my ($major, $minor) = ($1, $2);
 110         $feature_ipset_nomatch = 1 if ($major > 3) ||
 111             ($major == 3 && $minor >= 7);
 112     }
 113
 114 };
 115
 116 use Data::Dumper;
 117
 118 my $nodename = PVE::INotify::nodename();
 119
 120 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 121
 122 my $default_log_level = 'nolog'; # avoid logs by default
 123
 124 my $log_level_hash = {
 125     debug => 7,
 126     info => 6,
 127     notice => 5,
 128     warning => 4,
 129     err => 3,
 130     crit => 2,
 131     alert => 1,
 132     emerg => 0,
 133 };
 134
 135 # we need to overwrite some macros for ipv6
 136 my $pve_ipv6fw_macros = {
 137     'Ping' => [
 138         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 139     ],
 140     'Trcrt' => [
 141         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 142         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 143     ],
 144  };
 145
 146 # imported/converted from: /usr/share/shorewall/macro.*
 147 my $pve_fw_macros = {
 148     'Amanda' => [
 149         "Amanda Backup",
 150         { action => 'PARAM', proto => 'udp', dport => '10080' },
 151         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 152     ],
 153     'Auth' => [
 154         "Auth (identd) traffic",
 155         { action => 'PARAM', proto => 'tcp', dport => '113' },
 156     ],
 157     'BGP' => [
 158         "Border Gateway Protocol traffic",
 159         { action => 'PARAM', proto => 'tcp', dport => '179' },
 160     ],
 161     'BitTorrent' => [
 162         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 163         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 164         { action => 'PARAM', proto => 'udp', dport => '6881' },
 165     ],
 166     'BitTorrent32' => [
 167         "BitTorrent traffic for BitTorrent 3.2 and later",
 168         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 169         { action => 'PARAM', proto => 'udp', dport => '6881' },
 170     ],
 171     'CVS' => [
 172         "Concurrent Versions System pserver traffic",
 173         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 174     ],
 175     'Citrix' => [
 176         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 177         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 178         { action => 'PARAM', proto => 'udp', dport => '1604' },
 179         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 180     ],
 181     'DAAP' => [
 182         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 183         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 184         { action => 'PARAM', proto => 'udp', dport => '3689' },
 185     ],
 186     'DCC' => [
 187         "Distributed Checksum Clearinghouse spam filtering mechanism",
 188         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 189     ],
 190     'DHCPfwd' => [
 191         "Forwarded DHCP traffic",
 192         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 193     ],
 194     'DNS' => [
 195         "Domain Name System traffic (upd and tcp)",
 196         { action => 'PARAM', proto => 'udp', dport => '53' },
 197         { action => 'PARAM', proto => 'tcp', dport => '53' },
 198     ],
 199     'Distcc' => [
 200         "Distributed Compiler service",
 201         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 202     ],
 203     'FTP' => [
 204         "File Transfer Protocol",
 205         { action => 'PARAM', proto => 'tcp', dport => '21' },
 206     ],
 207     'Finger' => [
 208         "Finger protocol (RFC 742)",
 209         { action => 'PARAM', proto => 'tcp', dport => '79' },
 210     ],
 211     'GNUnet' => [
 212         "GNUnet secure peer-to-peer networking traffic",
 213         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 214         { action => 'PARAM', proto => 'udp', dport => '2086' },
 215         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 216         { action => 'PARAM', proto => 'udp', dport => '1080' },
 217     ],
 218     'GRE' => [
 219         "Generic Routing Encapsulation tunneling protocol",
 220         { action => 'PARAM', proto => '47' },
 221     ],
 222     'Git' => [
 223         "Git distributed revision control traffic",
 224         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 225     ],
 226     'HKP' => [
 227         "OpenPGP HTTP keyserver protocol traffic",
 228         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 229     ],
 230     'HTTP' => [
 231         "Hypertext Transfer Protocol (WWW)",
 232         { action => 'PARAM', proto => 'tcp', dport => '80' },
 233     ],
 234     'HTTPS' => [
 235         "Hypertext Transfer Protocol (WWW) over SSL",
 236         { action => 'PARAM', proto => 'tcp', dport => '443' },
 237     ],
 238     'ICPV2' => [
 239         "Internet Cache Protocol V2 (Squid) traffic",
 240         { action => 'PARAM', proto => 'udp', dport => '3130' },
 241     ],
 242     'ICQ' => [
 243         "AOL Instant Messenger traffic",
 244         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 245     ],
 246     'IMAP' => [
 247         "Internet Message Access Protocol",
 248         { action => 'PARAM', proto => 'tcp', dport => '143' },
 249     ],
 250     'IMAPS' => [
 251         "Internet Message Access Protocol over SSL",
 252         { action => 'PARAM', proto => 'tcp', dport => '993' },
 253     ],
 254     'IPIP' => [
 255         "IPIP capsulation traffic",
 256         { action => 'PARAM', proto => '94' },
 257     ],
 258     'IPsec' => [
 259         "IPsec traffic",
 260         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 261         { action => 'PARAM', proto => '50' },
 262     ],
 263     'IPsecah' => [
 264         "IPsec authentication (AH) traffic",
 265         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 266         { action => 'PARAM', proto => '51' },
 267     ],
 268     'IPsecnat' => [
 269         "IPsec traffic and Nat-Traversal",
 270         { action => 'PARAM', proto => 'udp', dport => '500' },
 271         { action => 'PARAM', proto => 'udp', dport => '4500' },
 272         { action => 'PARAM', proto => '50' },
 273     ],
 274     'IRC' => [
 275         "Internet Relay Chat traffic",
 276         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 277     ],
 278     'Jetdirect' => [
 279         "HP Jetdirect printing",
 280         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 281     ],
 282     'L2TP' => [
 283         "Layer 2 Tunneling Protocol traffic",
 284         { action => 'PARAM', proto => 'udp', dport => '1701' },
 285     ],
 286     'LDAP' => [
 287         "Lightweight Directory Access Protocol traffic",
 288         { action => 'PARAM', proto => 'tcp', dport => '389' },
 289     ],
 290     'LDAPS' => [
 291         "Secure Lightweight Directory Access Protocol traffic",
 292         { action => 'PARAM', proto => 'tcp', dport => '636' },
 293     ],
 294     'MSNP' => [
 295         "Microsoft Notification Protocol",
 296         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 297     ],
 298     'MSSQL' => [
 299         "Microsoft SQL Server",
 300         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 301     ],
 302     'Mail' => [
 303         "Mail traffic (SMTP, SMTPS, Submission)",
 304         { action => 'PARAM', proto => 'tcp', dport => '25' },
 305         { action => 'PARAM', proto => 'tcp', dport => '465' },
 306         { action => 'PARAM', proto => 'tcp', dport => '587' },
 307     ],
 308     'Munin' => [
 309         "Munin networked resource monitoring traffic",
 310         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 311     ],
 312     'MySQL' => [
 313         "MySQL server",
 314         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 315     ],
 316     'NNTP' => [
 317         "NNTP traffic (Usenet).",
 318         { action => 'PARAM', proto => 'tcp', dport => '119' },
 319     ],
 320     'NNTPS' => [
 321         "Encrypted NNTP traffic (Usenet)",
 322         { action => 'PARAM', proto => 'tcp', dport => '563' },
 323     ],
 324     'NTP' => [
 325         "Network Time Protocol (ntpd)",
 326         { action => 'PARAM', proto => 'udp', dport => '123' },
 327     ],
 328     'OSPF' => [
 329         "OSPF multicast traffic",
 330         { action => 'PARAM', proto => '89' },
 331     ],
 332     'OpenVPN' => [
 333         "OpenVPN traffic",
 334         { action => 'PARAM', proto => 'udp', dport => '1194' },
 335     ],
 336     'PCA' => [
 337         "Symantec PCAnywere (tm)",
 338         { action => 'PARAM', proto => 'udp', dport => '5632' },
 339         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 340     ],
 341     'POP3' => [
 342         "POP3 traffic",
 343         { action => 'PARAM', proto => 'tcp', dport => '110' },
 344     ],
 345     'POP3S' => [
 346         "Encrypted POP3 traffic",
 347         { action => 'PARAM', proto => 'tcp', dport => '995' },
 348     ],
 349     'PPtP' => [
 350         "Point-to-Point Tunneling Protocol",
 351         { action => 'PARAM', proto => '47' },
 352         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 353     ],
 354     'Ping' => [
 355         "ICMP echo request",
 356         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 357     ],
 358     'PostgreSQL' => [
 359         "PostgreSQL server",
 360         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 361     ],
 362     'Printer' => [
 363         "Line Printer protocol printing",
 364         { action => 'PARAM', proto => 'tcp', dport => '515' },
 365     ],
 366     'RDP' => [
 367         "Microsoft Remote Desktop Protocol traffic",
 368         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 369     ],
 370     'RIP' => [
 371         "Routing Information Protocol (bidirectional)",
 372         { action => 'PARAM', proto => 'udp', dport => '520' },
 373     ],
 374     'RNDC' => [
 375         "BIND remote management protocol",
 376         { action => 'PARAM', proto => 'tcp', dport => '953' },
 377     ],
 378     'Razor' => [
 379         "Razor Antispam System",
 380         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 381     ],
 382     'Rdate' => [
 383         "Remote time retrieval (rdate)",
 384         { action => 'PARAM', proto => 'tcp', dport => '37' },
 385     ],
 386     'Rsync' => [
 387         "Rsync server",
 388         { action => 'PARAM', proto => 'tcp', dport => '873' },
 389     ],
 390     'SANE' => [
 391         "SANE network scanning",
 392         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 393     ],
 394     'SMB' => [
 395         "Microsoft SMB traffic",
 396         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 397         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 398         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 399         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 400     ],
 401     'SMBswat' => [
 402         "Samba Web Administration Tool",
 403         { action => 'PARAM', proto => 'tcp', dport => '901' },
 404     ],
 405     'SMTP' => [
 406         "Simple Mail Transfer Protocol",
 407         { action => 'PARAM', proto => 'tcp', dport => '25' },
 408     ],
 409     'SMTPS' => [
 410         "Encrypted Simple Mail Transfer Protocol",
 411         { action => 'PARAM', proto => 'tcp', dport => '465' },
 412     ],
 413     'SNMP' => [
 414         "Simple Network Management Protocol",
 415         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 416         { action => 'PARAM', proto => 'tcp', dport => '161' },
 417     ],
 418     'SPAMD' => [
 419         "Spam Assassin SPAMD traffic",
 420         { action => 'PARAM', proto => 'tcp', dport => '783' },
 421     ],
 422     'SSH' => [
 423         "Secure shell traffic",
 424         { action => 'PARAM', proto => 'tcp', dport => '22' },
 425     ],
 426     'SVN' => [
 427         "Subversion server (svnserve)",
 428         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 429     ],
 430     'SixXS' => [
 431         "SixXS IPv6 Deployment and Tunnel Broker",
 432         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 433         { action => 'PARAM', proto => 'udp', dport => '3740' },
 434         { action => 'PARAM', proto => '41' },
 435         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 436     ],
 437     'Squid' => [
 438         "Squid web proxy traffic",
 439         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 440     ],
 441     'Submission' => [
 442         "Mail message submission traffic",
 443         { action => 'PARAM', proto => 'tcp', dport => '587' },
 444     ],
 445     'Syslog' => [
 446         "Syslog protocol (RFC 5424) traffic",
 447         { action => 'PARAM', proto => 'udp', dport => '514' },
 448         { action => 'PARAM', proto => 'tcp', dport => '514' },
 449     ],
 450     'TFTP' => [
 451         "Trivial File Transfer Protocol traffic",
 452         { action => 'PARAM', proto => 'udp', dport => '69' },
 453     ],
 454     'Telnet' => [
 455         "Telnet traffic",
 456         { action => 'PARAM', proto => 'tcp', dport => '23' },
 457     ],
 458     'Telnets' => [
 459         "Telnet over SSL",
 460         { action => 'PARAM', proto => 'tcp', dport => '992' },
 461     ],
 462     'Time' => [
 463         "RFC 868 Time protocol",
 464         { action => 'PARAM', proto => 'tcp', dport => '37' },
 465     ],
 466     'Trcrt' => [
 467         "Traceroute (for up to 30 hops) traffic",
 468         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 469         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 470     ],
 471     'VNC' => [
 472         "VNC traffic for VNC display's 0 - 99",
 473         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 474     ],
 475     'VNCL' => [
 476         "VNC traffic from Vncservers to Vncviewers in listen mode",
 477         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 478     ],
 479     'Web' => [
 480         "WWW traffic (HTTP and HTTPS)",
 481         { action => 'PARAM', proto => 'tcp', dport => '80' },
 482         { action => 'PARAM', proto => 'tcp', dport => '443' },
 483     ],
 484     'Webcache' => [
 485         "Web Cache/Proxy traffic (port 8080)",
 486         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 487     ],
 488     'Webmin' => [
 489         "Webmin traffic",
 490         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 491     ],
 492     'Whois' => [
 493         "Whois (nicname, RFC 3912) traffic",
 494         { action => 'PARAM', proto => 'tcp', dport => '43' },
 495     ],
 496 };
 497
 498 my $pve_fw_parsed_macros;
 499 my $pve_fw_macro_descr;
 500 my $pve_fw_preferred_macro_names = {};
 501
 502 my $pve_std_chains = {};
 503 $pve_std_chains->{4} = {
 504     'PVEFW-SET-ACCEPT-MARK' => [
 505         "-j MARK --set-mark 1",
 506     ],
 507     'PVEFW-DropBroadcast' => [
 508         # same as shorewall 'Broadcast'
 509         # simply DROP BROADCAST/MULTICAST/ANYCAST
 510         # we can use this to reduce logging
 511         { action => 'DROP', dsttype => 'BROADCAST' },
 512         { action => 'DROP', dsttype => 'MULTICAST' },
 513         { action => 'DROP', dsttype => 'ANYCAST' },
 514         { action => 'DROP', dest => '224.0.0.0/4' },
 515     ],
 516     'PVEFW-reject' => [
 517         # same as shorewall 'reject'
 518         { action => 'DROP', dsttype => 'BROADCAST' },
 519         { action => 'DROP', source => '224.0.0.0/4' },
 520         { action => 'DROP', proto => 'icmp' },
 521         "-p tcp -j REJECT --reject-with tcp-reset",
 522         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 523         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 524         "-j REJECT --reject-with icmp-host-prohibited",
 525     ],
 526     'PVEFW-Drop' => [
 527         # same as shorewall 'Drop', which is equal to DROP,
 528         # but REJECT/DROP some packages to reduce logging,
 529         # and ACCEPT critical ICMP types
 530         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 531         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 532         { action => 'PVEFW-DropBroadcast' },
 533         # ACCEPT critical ICMP types
 534         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 535         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 536         # Drop packets with INVALID state
 537         "-m conntrack --ctstate INVALID -j DROP",
 538         # Drop Microsoft SMB noise
 539         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 540         { action => 'DROP', proto => 'udp', dport => '137:139'},
 541         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 542         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 543         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 544         # Drop new/NotSyn traffic so that it doesn't get logged
 545         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 546         # Drop DNS replies
 547         { action => 'DROP', proto => 'udp', sport => 53 },
 548     ],
 549     'PVEFW-Reject' => [
 550         # same as shorewall 'Reject', which is equal to Reject,
 551         # but REJECT/DROP some packages to reduce logging,
 552         # and ACCEPT critical ICMP types
 553         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 554         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 555         { action => 'PVEFW-DropBroadcast' },
 556         # ACCEPT critical ICMP types
 557         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 558         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 559         # Drop packets with INVALID state
 560         "-m conntrack --ctstate INVALID -j DROP",
 561         # Drop Microsoft SMB noise
 562         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 563         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 564         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 565         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 566         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 567         # Drop new/NotSyn traffic so that it doesn't get logged
 568         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 569         # Drop DNS replies
 570         { action => 'DROP', proto => 'udp', sport => 53 },
 571     ],
 572     'PVEFW-tcpflags' => [
 573         # same as shorewall tcpflags action.
 574         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 575         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 576         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 577         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 578         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 579         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 580     ],
 581     'PVEFW-smurfs' => [
 582         # same as shorewall smurfs action
 583         # Filter packets for smurfs (packets with a broadcast address as the source).
 584         "-s 0.0.0.0/32 -j RETURN",
 585         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 586         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 587     ],
 588 };
 589
 590 $pve_std_chains->{6} = {
 591     'PVEFW-SET-ACCEPT-MARK' => [
 592         "-j MARK --set-mark 1",
 593     ],
 594     'PVEFW-DropBroadcast' => [
 595         # same as shorewall 'Broadcast'
 596         # simply DROP BROADCAST/MULTICAST/ANYCAST
 597         # we can use this to reduce logging
 598         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 599         # ipv6 addrtype does not work with kernel 2.6.32
 600         #{ action => 'DROP', dsttype => 'MULTICAST' },
 601         #{ action => 'DROP', dsttype => 'ANYCAST' },
 602         { action => 'DROP', dest => 'ff00::/8' },
 603         #{ action => 'DROP', dest => '224.0.0.0/4' },
 604     ],
 605     'PVEFW-reject' => [
 606         # same as shorewall 'reject'
 607         #{ action => 'DROP', dsttype => 'BROADCAST' },
 608         #{ action => 'DROP', source => '224.0.0.0/4' },
 609         { action => 'DROP', proto => 'icmpv6' },
 610         "-p tcp -j REJECT --reject-with tcp-reset",
 611         #"-p udp -j REJECT --reject-with icmp-port-unreachable",
 612         #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
 613         #"-j REJECT --reject-with icmp-host-prohibited",
 614     ],
 615     'PVEFW-Drop' => [
 616         # same as shorewall 'Drop', which is equal to DROP,
 617         # but REJECT/DROP some packages to reduce logging,
 618         # and ACCEPT critical ICMP types
 619         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 620         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 621         { action => 'PVEFW-DropBroadcast' },
 622         # ACCEPT critical ICMP types
 623         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 624         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 625         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 626
 627         # Drop packets with INVALID state
 628         "-m conntrack --ctstate INVALID -j DROP",
 629         # Drop Microsoft SMB noise
 630         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 631         { action => 'DROP', proto => 'udp', dport => '137:139'},
 632         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 633         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 634         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 635         # Drop new/NotSyn traffic so that it doesn't get logged
 636         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 637         # Drop DNS replies
 638         { action => 'DROP', proto => 'udp', sport => 53 },
 639     ],
 640     'PVEFW-Reject' => [
 641         # same as shorewall 'Reject', which is equal to Reject,
 642         # but REJECT/DROP some packages to reduce logging,
 643         # and ACCEPT critical ICMP types
 644         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 645         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 646         { action => 'PVEFW-DropBroadcast' },
 647         # ACCEPT critical ICMP types
 648         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 649         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 650         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 651
 652         # Drop packets with INVALID state
 653         "-m conntrack --ctstate INVALID -j DROP",
 654         # Drop Microsoft SMB noise
 655         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 656         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 657         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 658         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 659         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 660         # Drop new/NotSyn traffic so that it doesn't get logged
 661         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 662         # Drop DNS replies
 663         { action => 'DROP', proto => 'udp', sport => 53 },
 664     ],
 665     'PVEFW-tcpflags' => [
 666         # same as shorewall tcpflags action.
 667         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 668         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 669         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 670         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 671         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 672         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 673     ],
 674 };
 675
 676 # iptables -p icmp -h
 677 my $icmp_type_names = {
 678     any => 1,
 679     'echo-reply' => 1,
 680     'destination-unreachable' => 1,
 681     'network-unreachable' => 1,
 682     'host-unreachable' => 1,
 683     'protocol-unreachable' => 1,
 684     'port-unreachable' => 1,
 685     'fragmentation-needed' => 1,
 686     'source-route-failed' => 1,
 687     'network-unknown' => 1,
 688     'host-unknown' => 1,
 689     'network-prohibited' => 1,
 690     'host-prohibited' => 1,
 691     'TOS-network-unreachable' => 1,
 692     'TOS-host-unreachable' => 1,
 693     'communication-prohibited' => 1,
 694     'host-precedence-violation' => 1,
 695     'precedence-cutoff' => 1,
 696     'source-quench' => 1,
 697     'redirect' => 1,
 698     'network-redirect' => 1,
 699     'host-redirect' => 1,
 700     'TOS-network-redirect' => 1,
 701     'TOS-host-redirect' => 1,
 702     'echo-request' => 1,
 703     'router-advertisement' => 1,
 704     'router-solicitation' => 1,
 705     'time-exceeded' => 1,
 706     'ttl-zero-during-transit' => 1,
 707     'ttl-zero-during-reassembly' => 1,
 708     'parameter-problem' => 1,
 709     'ip-header-bad' => 1,
 710     'required-option-missing' => 1,
 711     'timestamp-request' => 1,
 712     'timestamp-reply' => 1,
 713     'address-mask-request' => 1,
 714     'address-mask-reply' => 1,
 715 };
 716
 717 # ip6tables -p icmpv6 -h
 718
 719 my $icmpv6_type_names = {
 720     'any' => 1,
 721     'destination-unreachable' => 1,
 722     'no-route' => 1,
 723     'communication-prohibited' => 1,
 724     'address-unreachable' => 1,
 725     'port-unreachable' => 1,
 726     'packet-too-big' => 1,
 727     'time-exceeded' => 1,
 728     'ttl-zero-during-transit' => 1,
 729     'ttl-zero-during-reassembly' => 1,
 730     'parameter-problem' => 1,
 731     'bad-header' => 1,
 732     'unknown-header-type' => 1,
 733     'unknown-option' => 1,
 734     'echo-request' => 1,
 735     'echo-reply' => 1,
 736     'router-solicitation' => 1,
 737     'router-advertisement' => 1,
 738     'neighbour-solicitation' => 1,
 739     'neighbour-advertisement' => 1,
 740     'redirect' => 1,
 741 };
 742
 743 sub init_firewall_macros {
 744
 745     $pve_fw_parsed_macros = {};
 746
 747     foreach my $k (keys %$pve_fw_macros) {
 748         my $lc_name = lc($k);
 749         my $macro = $pve_fw_macros->{$k};
 750         if (!ref($macro->[0])) {
 751             $pve_fw_macro_descr->{$k} = shift @$macro;
 752         }
 753         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 754         $pve_fw_parsed_macros->{$k} = $macro;
 755     }
 756 }
 757
 758 init_firewall_macros();
 759
 760 sub get_macros {
 761     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 762 }
 763
 764 my $etc_services;
 765
 766 sub get_etc_services {
 767
 768     return $etc_services if $etc_services;
 769
 770     my $filename = "/etc/services";
 771
 772     my $fh = IO::File->new($filename, O_RDONLY);
 773     if (!$fh) {
 774         warn "unable to read '$filename' - $!\n";
 775         return {};
 776     }
 777
 778     my $services = {};
 779
 780     while (my $line = <$fh>) {
 781         chomp ($line);
 782         next if $line =~m/^#/;
 783         next if ($line =~m/^\s*$/);
 784
 785         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 786             $services->{byid}->{$2}->{name} = $1;
 787             $services->{byid}->{$2}->{port} = $2;
 788             $services->{byid}->{$2}->{$3} = 1;
 789             $services->{byname}->{$1} = $services->{byid}->{$2};
 790         }
 791     }
 792
 793     close($fh);
 794
 795     $etc_services = $services;
 796
 797
 798     return $etc_services;
 799 }
 800
 801 my $etc_protocols;
 802
 803 sub get_etc_protocols {
 804     return $etc_protocols if $etc_protocols;
 805
 806     my $filename = "/etc/protocols";
 807
 808     my $fh = IO::File->new($filename, O_RDONLY);
 809     if (!$fh) {
 810         warn "unable to read '$filename' - $!\n";
 811         return {};
 812     }
 813
 814     my $protocols = {};
 815
 816     while (my $line = <$fh>) {
 817         chomp ($line);
 818         next if $line =~m/^#/;
 819         next if ($line =~m/^\s*$/);
 820
 821         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 822             $protocols->{byid}->{$2}->{name} = $1;
 823             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 824         }
 825     }
 826
 827     close($fh);
 828
 829     # add special case for ICMP v6
 830     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 831     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 832
 833     $etc_protocols = $protocols;
 834
 835     return $etc_protocols;
 836 }
 837
 838 my $ipv4_mask_hash_localnet = {
 839     '255.255.0.0' => 16,
 840     '255.255.128.0' => 17,
 841     '255.255.192.0' => 18,
 842     '255.255.224.0' => 19,
 843     '255.255.240.0' => 20,
 844     '255.255.248.0' => 21,
 845     '255.255.252.0' => 22,
 846     '255.255.254.0' => 23,
 847     '255.255.255.0' => 24,
 848     '255.255.255.128' => 25,
 849     '255.255.255.192' => 26,
 850     '255.255.255.224' => 27,
 851     '255.255.255.240' => 28,
 852     '255.255.255.248' => 29,
 853     '255.255.255.252' => 30,
 854 };
 855
 856 my $__local_network;
 857
 858 sub local_network {
 859     my ($new_value) = @_;
 860
 861     $__local_network = $new_value if defined($new_value);
 862
 863     return $__local_network if defined($__local_network);
 864
 865     eval {
 866         my $nodename = PVE::INotify::nodename();
 867
 868         my $ip = PVE::Cluster::remote_node_ip($nodename);
 869
 870         my $testip = Net::IP->new($ip);
 871
 872         my $routes = PVE::ProcFSTools::read_proc_net_route();
 873         foreach my $entry (@$routes) {
 874             my $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 875             next if !defined($mask);
 876             return if $mask eq '0.0.0.0';
 877             my $cidr = "$entry->{dest}/$mask";
 878             my $testnet = Net::IP->new($cidr);
 879             if ($testnet->overlaps($testip)) {
 880                 $__local_network = $cidr;
 881                 return;
 882             }
 883         }
 884     };
 885     warn $@ if $@;
 886
 887     return $__local_network;
 888 }
 889
 890 # ipset names are limited to 31 characters,
 891 # and we use '-v4' or '-v6' to indicate IP versions,
 892 # and we use '_swap' suffix for atomic update,
 893 # for example PVEFW-${VMID}-${ipset_name}_swap
 894
 895 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 896
 897 sub compute_ipset_chain_name {
 898     my ($vmid, $ipset_name, $ipversion) = @_;
 899
 900     $vmid = 0 if !defined($vmid);
 901
 902     my $id = "$vmid-${ipset_name}-v$ipversion";
 903
 904     if (length($id) > $max_iptables_ipset_name_length) {
 905         $id = PVE::Tools::fnv31a_hex($id);
 906     }
 907
 908     return "PVEFW-$id";
 909 }
 910
 911 sub compute_ipfilter_ipset_name {
 912     my ($iface) = @_;
 913
 914     return "ipfilter-$iface";
 915 }
 916
 917 sub parse_address_list {
 918     my ($str) = @_;
 919
 920     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 921         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 922         return;
 923     }
 924
 925     if ($str =~ m/^${ip_alias_pattern}$/) {
 926         die "alias name too long\n" if length($str) > $max_alias_name_length;
 927         return;
 928     }
 929
 930     my $count = 0;
 931     my $iprange = 0;
 932     my $ipversion;
 933
 934     foreach my $elem (split(/,/, $str)) {
 935         $count++;
 936         my $ip = Net::IP->new($elem);
 937         if (!$ip) {
 938             my $err = Net::IP::Error();
 939             die "invalid IP address: $err\n";
 940         }
 941         $iprange = 1 if $elem =~ m/-/;
 942
 943         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
 944
 945         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
 946             if $ipversion && ($new_ipversion != $ipversion);
 947
 948         $ipversion = $new_ipversion;
 949     }
 950
 951     die "you can't use a range in a list\n" if $iprange && $count > 1;
 952
 953     return $ipversion;
 954 }
 955
 956 sub parse_port_name_number_or_range {
 957     my ($str) = @_;
 958
 959     my $services = PVE::Firewall::get_etc_services();
 960     my $count = 0;
 961     my $icmp_port = 0;
 962
 963     foreach my $item (split(/,/, $str)) {
 964         $count++;
 965         if ($item =~ m/^(\d+):(\d+)$/) {
 966             my ($port1, $port2) = ($1, $2);
 967             die "invalid port '$port1'\n" if $port1 > 65535;
 968             die "invalid port '$port2'\n" if $port2 > 65535;
 969         } elsif ($item =~ m/^(\d+)$/) {
 970             my $port = $1;
 971             die "invalid port '$port'\n" if $port > 65535;
 972         } else {
 973             if ($icmp_type_names->{$item}) {
 974                 $icmp_port = 1;
 975             } elsif ($icmpv6_type_names->{$item}) {
 976                 $icmp_port = 1;
 977             } else {
 978                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 979             }
 980         }
 981     }
 982
 983     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 984
 985     return $count;
 986 }
 987
 988 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 989 sub pve_fw_verify_port_spec {
 990    my ($portstr) = @_;
 991
 992    parse_port_name_number_or_range($portstr);
 993
 994    return $portstr;
 995 }
 996
 997 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
 998 sub pve_fw_verify_addr_spec {
 999    my ($list) = @_;
1000
1001    parse_address_list($list);
1002
1003    return $list;
1004 }
1005
1006 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1007 sub pve_fw_verify_protocol_spec {
1008    my ($proto) = @_;
1009
1010    my $protocols = get_etc_protocols();
1011
1012    die "unknown protocol '$proto'\n" if $proto &&
1013        !(defined($protocols->{byname}->{$proto}) ||
1014          defined($protocols->{byid}->{$proto}));
1015
1016    return $proto;
1017 }
1018
1019
1020 # helper function for API
1021
1022 sub copy_opject_with_digest {
1023     my ($object) = @_;
1024
1025     my $sha = Digest::SHA->new('sha1');
1026
1027     my $res = {};
1028     foreach my $k (sort keys %$object) {
1029         my $v = $object->{$k};
1030         next if !defined($v);
1031         $res->{$k} = $v;
1032         $sha->add($k, ':', $v, "\n");
1033     }
1034
1035     my $digest = $sha->hexdigest;
1036
1037     $res->{digest} = $digest;
1038
1039     return wantarray ? ($res, $digest) : $res;
1040 }
1041
1042 sub copy_list_with_digest {
1043     my ($list) = @_;
1044
1045     my $sha = Digest::SHA->new('sha1');
1046
1047     my $res = [];
1048     foreach my $entry (@$list) {
1049         my $data = {};
1050         foreach my $k (sort keys %$entry) {
1051             my $v = $entry->{$k};
1052             next if !defined($v);
1053             $data->{$k} = $v;
1054             # Note: digest ignores refs ($rule->{errors})
1055             $sha->add($k, ':', $v, "\n") if !ref($v); ;
1056         }
1057         push @$res, $data;
1058     }
1059
1060     my $digest = $sha->hexdigest;
1061
1062     foreach my $entry (@$res) {
1063         $entry->{digest} = $digest;
1064     }
1065
1066     return wantarray ? ($res, $digest) : $res;
1067 }
1068
1069 my $rule_properties = {
1070     pos => {
1071         description => "Update rule at position <pos>.",
1072         type => 'integer',
1073         minimum => 0,
1074         optional => 1,
1075     },
1076     digest => get_standard_option('pve-config-digest'),
1077     type => {
1078         type => 'string',
1079         optional => 1,
1080         enum => ['in', 'out', 'group'],
1081     },
1082     action => {
1083         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1084         type => 'string',
1085         optional => 1,
1086         pattern => $security_group_name_pattern,
1087         maxLength => 20,
1088         minLength => 2,
1089     },
1090     macro => {
1091         type => 'string',
1092         optional => 1,
1093         maxLength => 128,
1094     },
1095     iface => get_standard_option('pve-iface', { optional => 1 }),
1096     source => {
1097         type => 'string', format => 'pve-fw-addr-spec',
1098         optional => 1,
1099     },
1100     dest => {
1101         type => 'string', format => 'pve-fw-addr-spec',
1102         optional => 1,
1103     },
1104     proto => {
1105         type => 'string', format => 'pve-fw-protocol-spec',
1106         optional => 1,
1107     },
1108     enable => {
1109         type => 'integer',
1110         minimum => 0,
1111         optional => 1,
1112     },
1113     sport => {
1114         type => 'string', format => 'pve-fw-port-spec',
1115         optional => 1,
1116     },
1117     dport => {
1118         type => 'string', format => 'pve-fw-port-spec',
1119         optional => 1,
1120     },
1121     comment => {
1122         type => 'string',
1123         optional => 1,
1124     },
1125 };
1126
1127 sub add_rule_properties {
1128     my ($properties) = @_;
1129
1130     foreach my $k (keys %$rule_properties) {
1131         my $h = $rule_properties->{$k};
1132         # copy data, so that we can modify later without side effects
1133         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1134     }
1135
1136     return $properties;
1137 }
1138
1139 sub delete_rule_properties {
1140     my ($rule, $delete_str) = @_;
1141
1142     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1143         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1144             if !defined($rule_properties->{$opt});
1145         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1146             if $opt eq 'type' || $opt eq 'action';
1147         delete $rule->{$opt};
1148     }
1149
1150     return $rule;
1151 }
1152
1153 my $apply_macro = sub {
1154     my ($macro_name, $param, $verify, $ipversion) = @_;
1155
1156     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1157     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1158
1159     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1160         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1161     }
1162
1163     my $rules = [];
1164
1165     foreach my $templ (@$macro_rules) {
1166         my $rule = {};
1167         my $param_used = {};
1168         foreach my $k (keys %$templ) {
1169             my $v = $templ->{$k};
1170             if ($v eq 'PARAM') {
1171                 $v = $param->{$k};
1172                 $param_used->{$k} = 1;
1173             } elsif ($v eq 'DEST') {
1174                 $v = $param->{dest};
1175                 $param_used->{dest} = 1;
1176             } elsif ($v eq 'SOURCE') {
1177                 $v = $param->{source};
1178                 $param_used->{source} = 1;
1179             }
1180
1181             if (!defined($v)) {
1182                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1183                 raise_param_exc({ macro => $msg }) if $verify;
1184                 die "$msg\n";
1185             }
1186             $rule->{$k} = $v;
1187         }
1188         foreach my $k (keys %$param) {
1189             next if $k eq 'macro';
1190             next if !defined($param->{$k});
1191             next if $param_used->{$k};
1192             if (defined($rule->{$k})) {
1193                 if ($rule->{$k} ne $param->{$k}) {
1194                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1195                     raise_param_exc({ $k => $msg }) if $verify;
1196                     die "$msg\n";
1197                 }
1198             } else {
1199                 $rule->{$k} = $param->{$k};
1200             }
1201         }
1202         push @$rules, $rule;
1203     }
1204
1205     return $rules;
1206 };
1207
1208 my $rule_env_iface_lookup = {
1209     'ct' => 1,
1210     'vm' => 1,
1211     'group' => 0,
1212     'cluster' => 1,
1213     'host' => 1,
1214 };
1215
1216 sub verify_rule {
1217     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1218
1219     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1220
1221     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1222     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1223
1224     my $errors = $rule->{errors} || {};
1225
1226     my $error_count = 0;
1227
1228     my $add_error = sub {
1229         my ($param, $msg)  = @_;
1230         chomp $msg;
1231         raise_param_exc({ $param => $msg }) if !$noerr;
1232         $error_count++;
1233         $errors->{$param} = $msg if !$errors->{$param};
1234     };
1235
1236     my $ipversion;
1237     my $set_ip_version = sub {
1238         my $vers = shift;
1239         if ($vers) {
1240             die "detected mixed ipv4/ipv6 adresses in rule\n"
1241                 if $ipversion && ($vers != $ipversion);
1242             $ipversion = $vers;
1243         }
1244     };
1245
1246     my $check_ipset_or_alias_property = sub {
1247         my ($name, $expected_ipversion) = @_;
1248
1249         if (my $value = $rule->{$name}) {
1250             if ($value =~ m/^\+/) {
1251                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1252                     &$add_error($name, "no such ipset '$1'")
1253                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1254
1255                 } else {
1256                     &$add_error($name, "invalid ipset name '$value'");
1257                 }
1258             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1259                 my $alias = lc($value);
1260                 &$add_error($name, "no such alias '$value'")
1261                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1262                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1263                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1264
1265                 &$set_ip_version($e->{ipversion});
1266             }
1267         }
1268     };
1269
1270     my $type = $rule->{type};
1271     my $action = $rule->{action};
1272
1273     &$add_error('type', "missing property") if !$type;
1274     &$add_error('action', "missing property") if !$action;
1275
1276     if ($type) {
1277         if ($type eq  'in' || $type eq 'out') {
1278             &$add_error('action', "unknown action '$action'")
1279                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1280         } elsif ($type eq 'group') {
1281             &$add_error('type', "security groups not allowed")
1282                 if !$allow_groups;
1283             &$add_error('action', "invalid characters in security group name")
1284                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1285         } else {
1286             &$add_error('type', "unknown rule type '$type'");
1287         }
1288     }
1289
1290     if ($rule->{iface}) {
1291         &$add_error('type', "parameter -i not allowed for this rule type")
1292             if !$allow_iface;
1293         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1294         &$add_error('iface', $@) if $@;
1295         if ($rule_env eq 'vm') {
1296             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1297                 if $rule->{iface} !~  m/^net(\d+)$/;
1298         } elsif ($rule_env eq 'ct') {
1299             &$add_error('iface', "value does not match the regex pattern '(venet|eth\\d+)'")
1300                 if $rule->{iface} !~  m/^(venet|eth(\d+))$/;
1301         }
1302     }
1303
1304     if ($rule->{macro}) {
1305         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1306             $rule->{macro} = $preferred_name;
1307         } else {
1308             &$add_error('macro', "unknown macro '$rule->{macro}'");
1309         }
1310     }
1311
1312     if ($rule->{proto}) {
1313         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1314         &$add_error('proto', $@) if $@;
1315         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1316         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1317     }
1318
1319     if ($rule->{dport}) {
1320         eval { parse_port_name_number_or_range($rule->{dport}); };
1321         &$add_error('dport', $@) if $@;
1322         &$add_error('proto', "missing property - 'dport' requires this property")
1323             if !$rule->{proto};
1324     }
1325
1326     if ($rule->{sport}) {
1327         eval { parse_port_name_number_or_range($rule->{sport}); };
1328         &$add_error('sport', $@) if $@;
1329         &$add_error('proto', "missing property - 'sport' requires this property")
1330             if !$rule->{proto};
1331     }
1332
1333     if ($rule->{source}) {
1334         eval {
1335             my $source_ipversion = parse_address_list($rule->{source});
1336             &$set_ip_version($source_ipversion);
1337         };
1338         &$add_error('source', $@) if $@;
1339         &$check_ipset_or_alias_property('source', $ipversion);
1340     }
1341
1342     if ($rule->{dest}) {
1343         eval {
1344             my $dest_ipversion = parse_address_list($rule->{dest});
1345             &$set_ip_version($dest_ipversion);
1346         };
1347         &$add_error('dest', $@) if $@;
1348         &$check_ipset_or_alias_property('dest', $ipversion);
1349     }
1350
1351     $rule->{ipversion} = $ipversion if $ipversion;
1352
1353     if ($rule->{macro} && !$error_count) {
1354         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1355         if (my $err = $@) {
1356             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1357                 my $eh = $err->{errors};
1358                 foreach my $p (keys %$eh) {
1359                     &$add_error($p, $eh->{$p});
1360                 }
1361             } else {
1362                 &$add_error('macro', "$err");
1363             }
1364         }
1365     }
1366
1367     $rule->{errors} = $errors if $error_count;
1368
1369     return $rule;
1370 }
1371
1372 sub copy_rule_data {
1373     my ($rule, $param) = @_;
1374
1375     foreach my $k (keys %$rule_properties) {
1376         if (defined(my $v = $param->{$k})) {
1377             if ($v eq '' || $v eq '-') {
1378                 delete $rule->{$k};
1379             } else {
1380                 $rule->{$k} = $v;
1381             }
1382         }
1383     }
1384
1385     return $rule;
1386 }
1387
1388 sub rules_modify_permissions {
1389     my ($rule_env) = @_;
1390
1391     if ($rule_env eq 'host') {
1392         return {
1393             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1394         };
1395     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1396         return {
1397             check => ['perm', '/', [ 'Sys.Modify' ]],
1398         };
1399     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1400         return {
1401             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1402         }
1403     }
1404
1405     return undef;
1406 }
1407
1408 sub rules_audit_permissions {
1409     my ($rule_env) = @_;
1410
1411     if ($rule_env eq 'host') {
1412         return {
1413             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1414         };
1415     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1416         return {
1417             check => ['perm', '/', [ 'Sys.Audit' ]],
1418         };
1419     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1420         return {
1421             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1422         }
1423     }
1424
1425     return undef;
1426 }
1427
1428 # core functions
1429 my $bridge_firewall_enabled = 0;
1430
1431 sub enable_bridge_firewall {
1432
1433     return if $bridge_firewall_enabled; # only once
1434
1435     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1436     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1437
1438     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1439     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1440
1441     $bridge_firewall_enabled = 1;
1442 }
1443
1444 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1445
1446 sub iptables_restore_cmdlist {
1447     my ($cmdlist) = @_;
1448
1449     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1450 }
1451
1452 sub ip6tables_restore_cmdlist {
1453     my ($cmdlist) = @_;
1454
1455     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1456 }
1457
1458 sub ipset_restore_cmdlist {
1459     my ($cmdlist) = @_;
1460
1461     run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1462 }
1463
1464 sub iptables_get_chains {
1465     my ($iptablescmd) = @_;
1466
1467     $iptablescmd = "iptables" if !$iptablescmd;
1468
1469     my $res = {};
1470
1471     # check what chains we want to track
1472     my $is_pvefw_chain = sub {
1473         my $name = shift;
1474
1475         return 1 if $name =~ m/^PVEFW-\S+$/;
1476
1477         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1478
1479         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1480
1481         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1482
1483         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1484         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1485
1486         return undef;
1487     };
1488
1489     my $table = '';
1490
1491     my $hooks = {};
1492
1493     my $parser = sub {
1494         my $line = shift;
1495
1496         return if $line =~ m/^#/;
1497         return if $line =~ m/^\s*$/;
1498
1499         if ($line =~ m/^\*(\S+)$/) {
1500             $table = $1;
1501             return;
1502         }
1503
1504         return if $table ne 'filter';
1505
1506         if ($line =~ m/^:(\S+)\s/) {
1507             my $chain = $1;
1508             return if !&$is_pvefw_chain($chain);
1509             $res->{$chain} = "unknown";
1510         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1511             my ($chain, $sig) = ($1, $2);
1512             return if !&$is_pvefw_chain($chain);
1513             $res->{$chain} = $sig;
1514         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1515             $hooks->{$1} = 1;
1516         } else {
1517             # simply ignore the rest
1518             return;
1519         }
1520     };
1521
1522     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1523
1524     return wantarray ? ($res, $hooks) : $res;
1525 }
1526
1527 sub iptables_chain_digest {
1528     my ($rules) = @_;
1529     my $digest = Digest::SHA->new('sha1');
1530     foreach my $rule (@$rules) { # order is important
1531         $digest->add($rule);
1532     }
1533     return $digest->b64digest;
1534 }
1535
1536 sub ipset_chain_digest {
1537     my ($rules) = @_;
1538
1539     my $digest = Digest::SHA->new('sha1');
1540     foreach my $rule (sort @$rules) { # note: sorted
1541         $digest->add($rule);
1542     }
1543     return $digest->b64digest;
1544 }
1545
1546 sub ipset_get_chains {
1547
1548     my $res = {};
1549     my $chains = {};
1550
1551     my $parser = sub {
1552         my $line = shift;
1553
1554         return if $line =~ m/^#/;
1555         return if $line =~ m/^\s*$/;
1556         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1557             my $chain = $1;
1558             $line =~ s/\s+$//; # delete trailing white space
1559             push @{$chains->{$chain}}, $line;
1560         } else {
1561             # simply ignore the rest
1562             return;
1563         }
1564     };
1565
1566     run_command("/sbin/ipset save", outfunc => $parser);
1567
1568     # compute digest for each chain
1569     foreach my $chain (keys %$chains) {
1570         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1571     }
1572
1573     return $res;
1574 }
1575
1576 sub ruleset_generate_cmdstr {
1577     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1578
1579     return if defined($rule->{enable}) && !$rule->{enable};
1580     return if $rule->{errors};
1581
1582     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1583
1584     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1585     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1586
1587     my @cmd = ();
1588
1589     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1590     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1591
1592     my $source = $rule->{source};
1593     my $dest = $rule->{dest};
1594
1595     if ($source) {
1596         if ($source =~ m/^\+/) {
1597             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1598                 my $name = $1;
1599                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1600                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1601                     push @cmd, "-m set --match-set ${ipset_chain} src";
1602                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1603                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1604                     push @cmd, "-m set --match-set ${ipset_chain} src";
1605                 } else {
1606                     die "no such ipset '$name'\n";
1607                 }
1608             } else {
1609                 die "invalid security group name '$source'\n";
1610             }
1611         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1612             my $alias = lc($source);
1613             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1614             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1615             die "no such alias '$source'\n" if !$e;
1616             push @cmd, "-s $e->{cidr}";
1617         } elsif ($source =~ m/\-/){
1618             push @cmd, "-m iprange --src-range $source";
1619         } else {
1620             push @cmd, "-s $source";
1621         }
1622     }
1623
1624     if ($dest) {
1625         if ($dest =~ m/^\+/) {
1626             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1627                 my $name = $1;
1628                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1629                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1630                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1631                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1632                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1633                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1634                 } else {
1635                     die "no such ipset '$name'\n";
1636                 }
1637             } else {
1638                 die "invalid security group name '$dest'\n";
1639             }
1640         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1641             my $alias = lc($dest);
1642             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1643             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1644             die "no such alias '$dest'\n" if !$e;
1645             push @cmd, "-d $e->{cidr}";
1646         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1647             push @cmd, "-m iprange --dst-range $dest";
1648         } else {
1649             push @cmd, "-d $dest";
1650         }
1651     }
1652
1653     if ($rule->{proto}) {
1654         push @cmd, "-p $rule->{proto}";
1655
1656         my $multiport = 0;
1657         $multiport++ if $nbdport > 1;
1658         $multiport++ if $nbsport > 1;
1659
1660         push @cmd, "--match multiport" if $multiport;
1661
1662         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1663             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1664
1665         if ($rule->{dport}) {
1666             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1667                 # Note: we use dport to store --icmp-type
1668                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1669                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1670             } elsif ($rule->{proto} && $rule->{proto} eq 'icmpv6') {
1671                 # Note: we use dport to store --icmpv6-type
1672                 die "unknown icmpv6-type '$rule->{dport}'\n" if !defined($icmpv6_type_names->{$rule->{dport}});
1673                 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1674             } else {
1675                 if ($nbdport > 1) {
1676                     if ($multiport == 2) {
1677                         push @cmd,  "--ports $rule->{dport}";
1678                     } else {
1679                         push @cmd, "--dports $rule->{dport}";
1680                     }
1681                 } else {
1682                     push @cmd, "--dport $rule->{dport}";
1683                 }
1684             }
1685         }
1686
1687         if ($rule->{sport}) {
1688             if ($nbsport > 1) {
1689                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1690             } else {
1691                 push @cmd, "--sport $rule->{sport}";
1692             }
1693         }
1694     } elsif ($rule->{dport} || $rule->{sport}) {
1695         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1696         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1697     }
1698
1699     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1700
1701     if (my $action = $rule->{action}) {
1702         $action = $actions->{$action} if defined($actions->{$action});
1703         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1704         push @cmd, $goto ? "-g $action" : "-j $action";
1705     }
1706
1707     return scalar(@cmd) ? join(' ', @cmd) : undef;
1708 }
1709
1710 sub ruleset_generate_rule {
1711     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1712
1713     my $rules;
1714
1715     if ($rule->{macro}) {
1716         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
1717     } else {
1718         $rules = [ $rule ];
1719     }
1720
1721     # update all or nothing
1722
1723     my @cmds = ();
1724     foreach my $tmp (@$rules) {
1725         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1726             push @cmds, $cmdstr;
1727         }
1728     }
1729
1730     foreach my $cmdstr (@cmds) {
1731         ruleset_addrule($ruleset, $chain, $cmdstr);
1732     }
1733 }
1734
1735 sub ruleset_generate_rule_insert {
1736     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
1737
1738     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1739
1740     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $rule, $actions, $goto)) {
1741         ruleset_insertrule($ruleset, $chain, $cmdstr);
1742     }
1743 }
1744
1745 sub ruleset_create_chain {
1746     my ($ruleset, $chain) = @_;
1747
1748     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1749     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1750
1751     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1752
1753     $ruleset->{$chain} = [];
1754 }
1755
1756 sub ruleset_chain_exist {
1757     my ($ruleset, $chain) = @_;
1758
1759     return $ruleset->{$chain} ? 1 : undef;
1760 }
1761
1762 sub ruleset_addrule {
1763    my ($ruleset, $chain, $rule) = @_;
1764
1765    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1766
1767    push @{$ruleset->{$chain}}, "-A $chain $rule";
1768 }
1769
1770 sub ruleset_insertrule {
1771    my ($ruleset, $chain, $rule) = @_;
1772
1773    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1774
1775    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1776 }
1777
1778 sub get_log_rule_base {
1779     my ($chain, $vmid, $msg, $loglevel) = @_;
1780
1781     die "internal error - no log level" if !defined($loglevel);
1782
1783     $vmid = 0 if !defined($vmid);
1784
1785     # Note: we use special format for prefix to pass further
1786     # info to log daemon (VMID, LOGVELEL and CHAIN)
1787
1788     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1789 }
1790
1791 sub ruleset_addlog {
1792     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1793
1794     return if !defined($loglevel);
1795
1796     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1797
1798     $logrule = "$rule $logrule" if defined($rule);
1799
1800     ruleset_addrule($ruleset, $chain, $logrule);
1801 }
1802
1803 sub ruleset_add_chain_policy {
1804     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
1805
1806     if ($policy eq 'ACCEPT') {
1807
1808         ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
1809                               { ACCEPT =>  $accept_action});
1810
1811     } elsif ($policy eq 'DROP') {
1812
1813         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1814
1815         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1816
1817         ruleset_addrule($ruleset, $chain, "-j DROP");
1818     } elsif ($policy eq 'REJECT') {
1819         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1820
1821         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1822
1823         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1824     } else {
1825         # should not happen
1826         die "internal error: unknown policy '$policy'";
1827     }
1828 }
1829
1830 sub ruleset_chain_add_conn_filters {
1831     my ($ruleset, $chain, $accept) = @_;
1832
1833     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1834     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1835 }
1836
1837 sub ruleset_chain_add_input_filters {
1838     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
1839
1840     if ($cluster_conf->{ipset}->{blacklist}){
1841         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1842             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1843             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1844             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1845         }
1846         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
1847         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1848     }
1849
1850     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1851         if ($ipversion == 4) {
1852             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1853         }
1854     }
1855
1856     if ($options->{tcpflags}) {
1857         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1858     }
1859 }
1860
1861 sub ruleset_create_vm_chain {
1862     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
1863
1864     ruleset_create_chain($ruleset, $chain);
1865     my $accept = generate_nfqueue($options);
1866
1867     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1868         if ($direction eq 'OUT') {
1869             ruleset_generate_rule($ruleset, $chain, $ipversion,
1870                                   { action => 'PVEFW-SET-ACCEPT-MARK',
1871                                     proto => 'udp', sport => 68, dport => 67 });
1872         } else {
1873             ruleset_generate_rule($ruleset, $chain, $ipversion,
1874                                   { action => 'ACCEPT',
1875                                     proto => 'udp', sport => 67, dport => 68 });
1876         }
1877     }
1878
1879     if ($direction eq 'OUT') {
1880         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1881             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1882         }
1883         if ($ipfilter_ipset) {
1884             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
1885         }
1886         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1887     }
1888 }
1889
1890 sub ruleset_add_group_rule {
1891     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
1892
1893     my $group = $rule->{action};
1894     my $group_chain = "GROUP-$group-$direction";
1895     if(!ruleset_chain_exist($ruleset, $group_chain)){
1896         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
1897     }
1898
1899     if ($direction eq 'OUT' && $rule->{iface_out}) {
1900         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1901     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1902         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1903     } else {
1904         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1905     }
1906
1907     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1908 }
1909
1910 sub ruleset_generate_vm_rules {
1911     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
1912
1913     my $lc_direction = lc($direction);
1914
1915     my $in_accept = generate_nfqueue($options);
1916
1917     foreach my $rule (@$rules) {
1918         next if $rule->{iface} && $rule->{iface} ne $netid;
1919         next if !$rule->{enable} || $rule->{errors};
1920         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
1921
1922         if ($rule->{type} eq 'group') {
1923             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1924                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
1925         } else {
1926             next if $rule->{type} ne $lc_direction;
1927             eval {
1928                 if ($direction eq 'OUT') {
1929                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
1930                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1931                                           undef, $cluster_conf, $vmfw_conf);
1932                 } else {
1933                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
1934                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1935                                           undef, $cluster_conf, $vmfw_conf);
1936                 }
1937             };
1938             warn $@ if $@;
1939         }
1940     }
1941 }
1942
1943 sub generate_nfqueue {
1944     my ($options) = @_;
1945
1946     if ($options->{ips}) {
1947         my $action = "NFQUEUE";
1948         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1949             if (defined($3) && defined($1)) {
1950                 $action .= " --queue-balance $1:$3";
1951             } elsif (defined($1)) {
1952                 $action .= " --queue-num $1";
1953             }
1954         }
1955         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1956         return $action;
1957     } else {
1958         return "ACCEPT";
1959     }
1960 }
1961
1962 sub ruleset_generate_vm_ipsrules {
1963     my ($ruleset, $options, $direction, $iface) = @_;
1964
1965     if ($options->{ips} && $direction eq 'IN') {
1966         my $nfqueue = generate_nfqueue($options);
1967
1968         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1969             ruleset_create_chain($ruleset, "PVEFW-IPS");
1970         }
1971
1972         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1973     }
1974 }
1975
1976 sub generate_venet_rules_direction {
1977     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction, $ipversion) = @_;
1978
1979     my $lc_direction = lc($direction);
1980
1981     my $rules = $vmfw_conf->{rules};
1982
1983     my $options = $vmfw_conf->{options};
1984     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1985
1986     my $chain = "venet0-$vmid-$direction";
1987
1988     ruleset_create_vm_chain($ruleset, $chain, $ipversion, $options, undef, undef, $direction);
1989
1990     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction, undef, $ipversion);
1991
1992     # implement policy
1993     my $policy;
1994
1995     if ($direction eq 'OUT') {
1996         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1997     } else {
1998         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1999     }
2000
2001     my $accept = generate_nfqueue($options);
2002     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2003     ruleset_add_chain_policy($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2004
2005     if ($direction eq 'OUT') {
2006         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", $ipversion, {
2007             action => $chain,
2008             source => $ip,
2009             iface_in => 'venet0'});
2010     } else {
2011         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", $ipversion, {
2012             action => $chain,
2013             dest => $ip,
2014             iface_out => 'venet0'});
2015     }
2016 }
2017
2018 sub generate_tap_rules_direction {
2019     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2020
2021     my $lc_direction = lc($direction);
2022
2023     my $rules = $vmfw_conf->{rules};
2024
2025     my $options = $vmfw_conf->{options};
2026     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2027
2028     my $tapchain = "$iface-$direction";
2029
2030     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2031     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2032         if $vmfw_conf->{ipset}->{$ipfilter_name};
2033
2034     # create chain with mac and ip filter
2035     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2036
2037     if ($options->{enable}) {
2038         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2039
2040         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2041
2042         # implement policy
2043         my $policy;
2044
2045         if ($direction eq 'OUT') {
2046             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2047         } else {
2048         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2049         }
2050
2051         my $accept = generate_nfqueue($options);
2052         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2053         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2054     } else {
2055         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2056         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2057     }
2058
2059     # plug the tap chain to bridge chain
2060     if ($direction eq 'IN') {
2061         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2062                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
2063     } else {
2064         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2065                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
2066     }
2067 }
2068
2069 sub enable_host_firewall {
2070     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2071
2072     my $options = $hostfw_conf->{options};
2073     my $cluster_options = $cluster_conf->{options};
2074     my $rules = $hostfw_conf->{rules};
2075     my $cluster_rules = $cluster_conf->{rules};
2076
2077     # host inbound firewall
2078     my $chain = "PVEFW-HOST-IN";
2079     ruleset_create_chain($ruleset, $chain);
2080
2081     my $loglevel = get_option_log_level($options, "log_level_in");
2082
2083     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
2084
2085     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2086     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2087
2088     # we use RETURN because we need to check also tap rules
2089     my $accept_action = 'RETURN';
2090
2091     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2092
2093     # add host rules first, so that cluster wide rules can be overwritten
2094     foreach my $rule (@$rules, @$cluster_rules) {
2095         next if !$rule->{enable} || $rule->{errors};
2096         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2097
2098         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2099
2100         eval {
2101             if ($rule->{type} eq 'group') {
2102                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2103             } elsif ($rule->{type} eq 'in') {
2104                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2105                                       { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2106                                       undef, $cluster_conf, $hostfw_conf);
2107             }
2108         };
2109         warn $@ if $@;
2110         delete $rule->{iface_in};
2111     }
2112
2113     # allow standard traffic for management ipset (includes cluster network)
2114     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2115     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2116     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
2117     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2118     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2119     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
2120
2121     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2122     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2123
2124     # corosync
2125     if ($localnet && ($ipversion == $localnet_ver)) {
2126         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2127         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
2128         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
2129     }
2130
2131     # implement input policy
2132     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2133     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2134
2135     # host outbound firewall
2136     $chain = "PVEFW-HOST-OUT";
2137     ruleset_create_chain($ruleset, $chain);
2138
2139     $loglevel = get_option_log_level($options, "log_level_out");
2140
2141     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
2142
2143     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2144
2145     # we use RETURN because we may want to check other thigs later
2146     $accept_action = 'RETURN';
2147
2148     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2149
2150     # add host rules first, so that cluster wide rules can be overwritten
2151     foreach my $rule (@$rules, @$cluster_rules) {
2152         next if !$rule->{enable} || $rule->{errors};
2153         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2154
2155         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2156         eval {
2157             if ($rule->{type} eq 'group') {
2158                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2159             } elsif ($rule->{type} eq 'out') {
2160                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2161                                       $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2162                                       undef, $cluster_conf, $hostfw_conf);
2163             }
2164         };
2165         warn $@ if $@;
2166         delete $rule->{iface_out};
2167     }
2168
2169     # allow standard traffic on cluster network
2170     if ($localnet && ($ipversion == $localnet_ver)) {
2171         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
2172         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
2173         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2174         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2175
2176         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2177         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
2178         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
2179     }
2180
2181     # implement output policy
2182     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2183     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2184
2185     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2186     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2187 }
2188
2189 sub generate_group_rules {
2190     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2191
2192     my $rules = $cluster_conf->{groups}->{$group};
2193
2194     if (!$rules) {
2195         warn "no such security group '$group'\n";
2196         $rules = []; # create empty chain
2197     }
2198
2199     my $chain = "GROUP-${group}-IN";
2200
2201     ruleset_create_chain($ruleset, $chain);
2202     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2203
2204     foreach my $rule (@$rules) {
2205         next if $rule->{type} ne 'in';
2206         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2207         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2208                               { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2209                               undef, $cluster_conf);
2210     }
2211
2212     $chain = "GROUP-${group}-OUT";
2213
2214     ruleset_create_chain($ruleset, $chain);
2215     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2216
2217     foreach my $rule (@$rules) {
2218         next if $rule->{type} ne 'out';
2219         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2220         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2221         # check also other tap rules later
2222         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2223                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2224                               undef, $cluster_conf);
2225     }
2226 }
2227
2228 my $MAX_NETS = 32;
2229 my $valid_netdev_names = {};
2230 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2231     $valid_netdev_names->{"net$i"} = 1;
2232 }
2233
2234 sub parse_fw_rule {
2235     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2236
2237     my $orig_line = $line;
2238
2239     my $rule = {};
2240
2241     # we can add single line comments to the end of the rule
2242     if ($line =~ s/#\s*(.*?)\s*$//) {
2243         $rule->{comment} = decode('utf8', $1);
2244     }
2245
2246     # we can disable a rule when prefixed with '|'
2247
2248     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2249
2250     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2251         die "unable to parse rule: $line\n";
2252
2253     $rule->{type} = lc($1);
2254     $rule->{action} = $2;
2255
2256     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2257         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2258             $rule->{macro} = $1;
2259             $rule->{action} = $2;
2260         }
2261     }
2262
2263     while (length($line)) {
2264         if ($line =~ s/^-i (\S+)\s*//) {
2265             $rule->{iface} = $1;
2266             next;
2267         }
2268
2269         last if $rule->{type} eq 'group';
2270
2271         if ($line =~ s/^-p (\S+)\s*//) {
2272             $rule->{proto} = $1;
2273             next;
2274         }
2275
2276         if ($line =~ s/^-dport (\S+)\s*//) {
2277             $rule->{dport} = $1;
2278             next;
2279         }
2280
2281         if ($line =~ s/^-sport (\S+)\s*//) {
2282             $rule->{sport} = $1;
2283             next;
2284         }
2285         if ($line =~ s/^-source (\S+)\s*//) {
2286             $rule->{source} = $1;
2287             next;
2288         }
2289         if ($line =~ s/^-dest (\S+)\s*//) {
2290             $rule->{dest} = $1;
2291             next;
2292         }
2293
2294         last;
2295     }
2296
2297     die "unable to parse rule parameters: $line\n" if length($line);
2298
2299     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2300     if ($verbose && $rule->{errors}) {
2301         warn "$prefix - errors in rule parameters: $orig_line\n";
2302         foreach my $p (keys %{$rule->{errors}}) {
2303             warn "  $p: $rule->{errors}->{$p}\n";
2304         }
2305     }
2306
2307     return $rule;
2308 }
2309
2310 sub parse_vmfw_option {
2311     my ($line) = @_;
2312
2313     my ($opt, $value);
2314
2315     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2316
2317     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
2318         $opt = lc($1);
2319         $value = int($2);
2320     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2321         $opt = lc($1);
2322         $value = $2 ? lc($3) : '';
2323     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2324         $opt = lc($1);
2325         $value = uc($3);
2326     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2327         $opt = lc($1);
2328         $value = $2;
2329     } else {
2330         die "can't parse option '$line'\n"
2331     }
2332
2333     return ($opt, $value);
2334 }
2335
2336 sub parse_hostfw_option {
2337     my ($line) = @_;
2338
2339     my ($opt, $value);
2340
2341     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2342
2343     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
2344         $opt = lc($1);
2345         $value = int($2);
2346     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2347         $opt = lc($1);
2348         $value = $2 ? lc($3) : '';
2349     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2350         $opt = lc($1);
2351         $value = int($2);
2352     } else {
2353         die "can't parse option '$line'\n"
2354     }
2355
2356     return ($opt, $value);
2357 }
2358
2359 sub parse_clusterfw_option {
2360     my ($line) = @_;
2361
2362     my ($opt, $value);
2363
2364     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2365         $opt = lc($1);
2366         $value = int($2);
2367         if (($value > 1) && ((time() - $value) > 60)) {
2368             $value = 0
2369         }
2370     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2371         $opt = lc($1);
2372         $value = uc($3);
2373     } else {
2374         die "can't parse option '$line'\n"
2375     }
2376
2377     return ($opt, $value);
2378 }
2379
2380 sub resolve_alias {
2381     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2382
2383     my $alias = lc($cidr);
2384     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2385     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2386
2387     die "no such alias '$cidr'\n" if !$e;;
2388
2389     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2390 }
2391
2392 sub parse_ip_or_cidr {
2393     my ($cidr) = @_;
2394
2395     my $ipversion;
2396
2397     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2398         $cidr =~ s|/128$||;
2399         $ipversion = 6;
2400     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2401         $cidr =~ s|/32$||;
2402         $ipversion = 4;
2403     } else {
2404         die "value does not look like a valid IP address or CIDR network\n";
2405     }
2406
2407     return wantarray ? ($cidr, $ipversion) : $cidr;
2408 }
2409
2410 sub parse_alias {
2411     my ($line) = @_;
2412
2413     # we can add single line comments to the end of the line
2414     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2415
2416     if ($line =~ m/^(\S+)\s(\S+)$/) {
2417         my ($name, $cidr) = ($1, $2);
2418         my $ipversion;
2419
2420         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2421
2422         my $data = {
2423             name => $name,
2424             cidr => $cidr,
2425             ipversion => $ipversion,
2426         };
2427         $data->{comment} = $comment  if $comment;
2428         return $data;
2429     }
2430
2431     return undef;
2432 }
2433
2434 sub generic_fw_config_parser {
2435     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2436
2437     my $section;
2438     my $group;
2439
2440     my $res = $empty_conf;
2441
2442     while (defined(my $line = <$fh>)) {
2443         next if $line =~ m/^#/;
2444         next if $line =~ m/^\s*$/;
2445
2446         chomp $line;
2447
2448         my $linenr = $fh->input_line_number();
2449         my $prefix = "$filename (line $linenr)";
2450
2451         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2452             $section = 'options';
2453             next;
2454         }
2455
2456         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2457             $section = 'aliases';
2458             next;
2459         }
2460
2461         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2462             $section = 'groups';
2463             $group = lc($1);
2464             my $comment = $2;
2465             eval {
2466                 die "security group name too long\n" if length($group) > $max_group_name_length;
2467                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2468             };
2469             if (my $err = $@) {
2470                 ($section, $group, $comment) = undef;
2471                 warn "$prefix: $err";
2472                 next;
2473             }
2474
2475             $res->{$section}->{$group} = [];
2476             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2477                 if $comment;
2478             next;
2479         }
2480
2481         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2482             $section = 'rules';
2483             next;
2484         }
2485
2486         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2487             $section = 'ipset';
2488             $group = lc($1);
2489             my $comment = $2;
2490             eval {
2491                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2492                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2493             };
2494             if (my $err = $@) {
2495                 ($section, $group, $comment) = undef;
2496                 warn "$prefix: $err";
2497                 next;
2498             }
2499
2500             $res->{$section}->{$group} = [];
2501             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2502                 if $comment;
2503             next;
2504         }
2505
2506         if (!$section) {
2507             warn "$prefix: skip line - no section\n";
2508             next;
2509         }
2510
2511         if ($section eq 'options') {
2512             eval {
2513                 my ($opt, $value);
2514                 if ($rule_env eq 'cluster') {
2515                     ($opt, $value) = parse_clusterfw_option($line);
2516                 } elsif ($rule_env eq 'host') {
2517                     ($opt, $value) = parse_hostfw_option($line);
2518                 } else {
2519                     ($opt, $value) = parse_vmfw_option($line);
2520                 }
2521                 $res->{options}->{$opt} = $value;
2522             };
2523             warn "$prefix: $@" if $@;
2524         } elsif ($section eq 'aliases') {
2525             eval {
2526                 my $data = parse_alias($line);
2527                 $res->{aliases}->{lc($data->{name})} = $data;
2528             };
2529             warn "$prefix: $@" if $@;
2530         } elsif ($section eq 'rules') {
2531             my $rule;
2532             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2533             if (my $err = $@) {
2534                 warn "$prefix: $err";
2535                 next;
2536             }
2537             push @{$res->{$section}}, $rule;
2538         } elsif ($section eq 'groups') {
2539             my $rule;
2540             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2541             if (my $err = $@) {
2542                 warn "$prefix: $err";
2543                 next;
2544             }
2545             push @{$res->{$section}->{$group}}, $rule;
2546         } elsif ($section eq 'ipset') {
2547             # we can add single line comments to the end of the rule
2548             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2549
2550             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2551             my $nomatch = $1;
2552             my $cidr = $2;
2553             my $errors;
2554
2555             if ($nomatch && !$feature_ipset_nomatch) {
2556                 $errors->{nomatch} = "nomatch not supported by kernel";
2557             }
2558
2559             eval {
2560                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2561                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2562                 } else {
2563                     $cidr = parse_ip_or_cidr($cidr);
2564                 }
2565             };
2566             if (my $err = $@) {
2567                 chomp $err;
2568                 $errors->{cidr} = $err;
2569             }
2570
2571             my $entry = { cidr => $cidr };
2572             $entry->{nomatch} = 1 if $nomatch;
2573             $entry->{comment} = $comment if $comment;
2574             $entry->{errors} =  $errors if $errors;
2575
2576             if ($verbose && $errors) {
2577                 warn "$prefix - errors in ipset '$group': $line\n";
2578                 foreach my $p (keys %{$errors}) {
2579                     warn "  $p: $errors->{$p}\n";
2580                 }
2581             }
2582
2583             push @{$res->{$section}->{$group}}, $entry;
2584         } else {
2585             warn "$prefix: skip line - unknown section\n";
2586             next;
2587         }
2588     }
2589
2590     return $res;
2591 }
2592
2593 sub parse_hostfw_config {
2594     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2595
2596     my $empty_conf = { rules => [], options => {}};
2597
2598     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2599 }
2600
2601 sub parse_vmfw_config {
2602     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2603
2604     my $empty_conf = {
2605         rules => [],
2606         options => {},
2607         aliases => {},
2608         ipset => {} ,
2609         ipset_comments => {},
2610     };
2611
2612     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2613 }
2614
2615 sub parse_clusterfw_config {
2616     my ($filename, $fh, $verbose) = @_;
2617
2618     my $section;
2619     my $group;
2620
2621     my $empty_conf = {
2622         rules => [],
2623         options => {},
2624         aliases => {},
2625         groups => {},
2626         group_comments => {},
2627         ipset => {} ,
2628         ipset_comments => {},
2629     };
2630
2631     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2632 }
2633
2634 sub run_locked {
2635     my ($code, @param) = @_;
2636
2637     my $timeout = 10;
2638
2639     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2640
2641     die $@ if $@;
2642
2643     return $res;
2644 }
2645
2646 sub read_local_vm_config {
2647
2648     my $openvz = {};
2649     my $qemu = {};
2650
2651     my $vmdata = { openvz => $openvz, qemu => $qemu };
2652
2653     my $vmlist = PVE::Cluster::get_vmlist();
2654     return $vmdata if !$vmlist || !$vmlist->{ids};
2655     my $ids = $vmlist->{ids};
2656
2657     foreach my $vmid (keys %$ids) {
2658         next if !$vmid; # skip VE0
2659         my $d = $ids->{$vmid};
2660         next if !$d->{node} || $d->{node} ne $nodename;
2661         next if !$d->{type};
2662         if ($d->{type} eq 'openvz') {
2663             if ($have_pve_manager) {
2664                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2665                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2666                     $openvz->{$vmid} = $conf;
2667                 }
2668             }
2669         } elsif ($d->{type} eq 'qemu') {
2670             if ($have_qemu_server) {
2671                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2672                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2673                     $qemu->{$vmid} = $conf;
2674                 }
2675             }
2676         }
2677     }
2678
2679     return $vmdata;
2680 };
2681
2682 sub load_vmfw_conf {
2683     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2684
2685     my $vmfw_conf = {};
2686
2687     $dir = $pvefw_conf_dir if !defined($dir);
2688
2689     my $filename = "$dir/$vmid.fw";
2690     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2691         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2692         $vmfw_conf->{vmid} = $vmid;
2693     }
2694
2695     return $vmfw_conf;
2696 }
2697
2698 my $format_rules = sub {
2699     my ($rules, $allow_iface) = @_;
2700
2701     my $raw = '';
2702
2703     foreach my $rule (@$rules) {
2704         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2705             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2706             $raw .= uc($rule->{type});
2707             if ($rule->{macro}) {
2708                 $raw .= " $rule->{macro}($rule->{action})";
2709             } else {
2710                 $raw .= " " . $rule->{action};
2711             }
2712             if ($allow_iface && $rule->{iface}) {
2713                 $raw .= " -i $rule->{iface}";
2714             }
2715
2716             if ($rule->{type} ne  'group')  {
2717                 $raw .= " -source $rule->{source}" if $rule->{source};
2718                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2719                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2720                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2721                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2722             }
2723
2724             $raw .= " # " . encode('utf8', $rule->{comment})
2725                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2726             $raw .= "\n";
2727         } else {
2728             die "unknown rule type '$rule->{type}'";
2729         }
2730     }
2731
2732     return $raw;
2733 };
2734
2735 my $format_options = sub {
2736     my ($options) = @_;
2737
2738     my $raw = '';
2739
2740     $raw .= "[OPTIONS]\n\n";
2741     foreach my $opt (keys %$options) {
2742         $raw .= "$opt: $options->{$opt}\n";
2743     }
2744     $raw .= "\n";
2745
2746     return $raw;
2747 };
2748
2749 my $format_aliases = sub {
2750     my ($aliases) = @_;
2751
2752     my $raw = '';
2753
2754     $raw .= "[ALIASES]\n\n";
2755     foreach my $k (keys %$aliases) {
2756         my $e = $aliases->{$k};
2757         $raw .= "$e->{name} $e->{cidr}";
2758         $raw .= " # " . encode('utf8', $e->{comment})
2759             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2760         $raw .= "\n";
2761     }
2762     $raw .= "\n";
2763
2764     return $raw;
2765 };
2766
2767 my $format_ipsets = sub {
2768     my ($fw_conf) = @_;
2769
2770     my $raw = '';
2771
2772     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2773         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2774             my $utf8comment = encode('utf8', $comment);
2775             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2776         } else {
2777             $raw .= "[IPSET $ipset]\n\n";
2778         }
2779         my $options = $fw_conf->{ipset}->{$ipset};
2780
2781         my $nethash = {};
2782         foreach my $entry (@$options) {
2783             $nethash->{$entry->{cidr}} = $entry;
2784         }
2785
2786         foreach my $cidr (sort keys %$nethash) {
2787             my $entry = $nethash->{$cidr};
2788             my $line = $entry->{nomatch} ? '!' : '';
2789             $line .= $entry->{cidr};
2790             $line .= " # " . encode('utf8', $entry->{comment})
2791                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2792             $raw .= "$line\n";
2793         }
2794
2795         $raw .= "\n";
2796     }
2797
2798     return $raw;
2799 };
2800
2801 sub save_vmfw_conf {
2802     my ($vmid, $vmfw_conf) = @_;
2803
2804     my $raw = '';
2805
2806     my $options = $vmfw_conf->{options};
2807     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2808
2809     my $aliases = $vmfw_conf->{aliases};
2810     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2811
2812     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2813
2814     my $rules = $vmfw_conf->{rules} || [];
2815     if ($rules && scalar(@$rules)) {
2816         $raw .= "[RULES]\n\n";
2817         $raw .= &$format_rules($rules, 1);
2818         $raw .= "\n";
2819     }
2820
2821     mkdir $pvefw_conf_dir;
2822
2823     my $filename = "$pvefw_conf_dir/$vmid.fw";
2824     PVE::Tools::file_set_contents($filename, $raw);
2825 }
2826
2827 sub read_vm_firewall_configs {
2828     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2829
2830     my $vmfw_configs = {};
2831
2832     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2833         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2834         next if !$vmfw_conf->{options}; # skip if file does not exists
2835         $vmfw_configs->{$vmid} = $vmfw_conf;
2836     }
2837     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2838         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2839         next if !$vmfw_conf->{options}; # skip if file does not exists
2840         $vmfw_configs->{$vmid} = $vmfw_conf;
2841     }
2842
2843     return $vmfw_configs;
2844 }
2845
2846 sub get_option_log_level {
2847     my ($options, $k) = @_;
2848
2849     my $v = $options->{$k};
2850     $v = $default_log_level if !defined($v);
2851
2852     return undef if $v eq '' || $v eq 'nolog';
2853
2854     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2855
2856     return $v if ($v >= 0) && ($v <= 7);
2857
2858     warn "unknown log level ($k = '$v')\n";
2859
2860     return undef;
2861 }
2862
2863 sub generate_std_chains {
2864     my ($ruleset, $options, $ipversion) = @_;
2865
2866     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
2867
2868     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2869
2870     my $chain;
2871
2872     if ($ipversion == 4) {
2873         # same as shorewall smurflog.
2874         $chain = 'PVEFW-smurflog';
2875         $std_chains->{$chain} = [];
2876
2877         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2878         push @{$std_chains->{$chain}}, "-j DROP";
2879     }
2880
2881     # same as shorewall logflags action.
2882     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2883     $chain = 'PVEFW-logflags';
2884     $std_chains->{$chain} = [];
2885
2886     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2887     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2888     push @{$std_chains->{$chain}}, "-j DROP";
2889
2890     foreach my $chain (keys %$std_chains) {
2891         ruleset_create_chain($ruleset, $chain);
2892         foreach my $rule (@{$std_chains->{$chain}}) {
2893             if (ref($rule)) {
2894                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2895             } else {
2896                 ruleset_addrule($ruleset, $chain, $rule);
2897             }
2898         }
2899     }
2900 }
2901
2902 sub generate_ipset_chains {
2903     my ($ipset_ruleset, $clusterfw_conf, $fw_conf) = @_; #fixme
2904
2905     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2906
2907         my $options = $fw_conf->{ipset}->{$ipset};
2908
2909         # remove duplicates
2910         my $nethash = {};
2911         foreach my $entry (@$options) {
2912             next if $entry->{errors}; # skip entries with errors
2913             eval {
2914                 my ($cidr, $ver);
2915                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
2916                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
2917                 } else {
2918                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
2919                 }
2920                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
2921                 if ($ver == 6) {
2922                     my $ipv6 = inet_pton(AF_INET6, lc($cidr));
2923                     $cidr = inet_ntop(AF_INET6, $ipv6);
2924                     $cidr =~ s|/128$||;
2925                 } else {
2926                     $cidr =~ s|/32$||;
2927                 }
2928
2929                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
2930             };
2931             warn $@ if $@;
2932         }
2933
2934         foreach my $ipversion (4, 6) {
2935             my $data = $nethash->{$ipversion};
2936
2937             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
2938
2939             my $hashsize = scalar(@$options);
2940             if ($hashsize <= 64) {
2941                 $hashsize = 64;
2942             } else {
2943                 $hashsize = round_powerof2($hashsize);
2944             }
2945
2946             my $family = $ipversion == "6" ? "inet6" : "inet";
2947
2948             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
2949
2950             foreach my $cidr (sort keys %$data) {
2951                 my $entry = $data->{$cidr};
2952
2953                 my $cmd = "add $name $cidr";
2954                 if ($entry->{nomatch}) {
2955                     if ($feature_ipset_nomatch) {
2956                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2957                     } else {
2958                         warn "ignore !$cidr - nomatch not supported by kernel\n";
2959                     }
2960                 } else {
2961                     push @{$ipset_ruleset->{$name}}, $cmd;
2962                 }
2963             }
2964         }
2965     }
2966 }
2967
2968 sub round_powerof2 {
2969     my ($int) = @_;
2970
2971     $int--;
2972     $int |= $int >> $_ foreach (1,2,4,8,16);
2973     return ++$int;
2974 }
2975
2976 sub load_clusterfw_conf {
2977     my ($filename, $verbose) = @_;
2978
2979     $filename = $clusterfw_conf_filename if !defined($filename);
2980
2981     my $cluster_conf = {};
2982     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2983         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
2984     }
2985
2986     return $cluster_conf;
2987 }
2988
2989 sub save_clusterfw_conf {
2990     my ($cluster_conf) = @_;
2991
2992     my $raw = '';
2993
2994     my $options = $cluster_conf->{options};
2995     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2996
2997     my $aliases = $cluster_conf->{aliases};
2998     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2999
3000     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3001
3002     my $rules = $cluster_conf->{rules};
3003     if ($rules && scalar(@$rules)) {
3004         $raw .= "[RULES]\n\n";
3005         $raw .= &$format_rules($rules, 1);
3006         $raw .= "\n";
3007     }
3008
3009     if ($cluster_conf->{groups}) {
3010         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3011             my $rules = $cluster_conf->{groups}->{$group};
3012             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3013                 my $utf8comment = encode('utf8', $comment);
3014                 $raw .= "[group $group] # $utf8comment\n\n";
3015             } else {
3016                 $raw .= "[group $group]\n\n";
3017             }
3018
3019             $raw .= &$format_rules($rules, 0);
3020             $raw .= "\n";
3021         }
3022     }
3023
3024     mkdir $pvefw_conf_dir;
3025     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3026 }
3027
3028 sub load_hostfw_conf {
3029     my ($cluster_conf, $filename, $verbose) = @_;
3030
3031     $filename = $hostfw_conf_filename if !defined($filename);
3032
3033     my $hostfw_conf = {};
3034     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3035         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3036     }
3037     return $hostfw_conf;
3038 }
3039
3040 sub save_hostfw_conf {
3041     my ($hostfw_conf) = @_;
3042
3043     my $raw = '';
3044
3045     my $options = $hostfw_conf->{options};
3046     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3047
3048     my $rules = $hostfw_conf->{rules};
3049     if ($rules && scalar(@$rules)) {
3050         $raw .= "[RULES]\n\n";
3051         $raw .= &$format_rules($rules, 1);
3052         $raw .= "\n";
3053     }
3054
3055     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3056 }
3057
3058 sub compile {
3059     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3060
3061     my $vmfw_configs;
3062
3063     if ($vmdata) { # test mode
3064         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3065         my $filename = "$testdir/cluster.fw";
3066         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3067
3068         $filename = "$testdir/host.fw";
3069         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3070
3071         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3072     } else { # normal operation
3073         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3074
3075         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3076
3077         $vmdata = read_local_vm_config();
3078         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3079     }
3080
3081     my ($ruleset, $ipset_ruleset) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3082     my ($rulesetv6) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3083
3084     return ($ruleset, $ipset_ruleset, $rulesetv6);
3085 }
3086
3087 sub compile_iptables_filter {
3088     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3089
3090     $cluster_conf->{ipset}->{venet0} = [];
3091     my $venet0_ipset_chain = compute_ipset_chain_name(0, 'venet0', $ipversion);
3092
3093     my $localnet;
3094     if ($cluster_conf->{aliases}->{local_network}) {
3095         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3096     } else {
3097         my $localnet_ver;
3098         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3099
3100         $cluster_conf->{aliases}->{local_network} = {
3101             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3102     }
3103
3104     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3105
3106     return ({}, {}) if !$cluster_conf->{options}->{enable};
3107
3108     my $ruleset = {};
3109
3110     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3111     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3112
3113     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3114
3115     my $hostfw_options = $hostfw_conf->{options} || {};
3116
3117     # fixme: what log level should we use here?
3118     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3119
3120     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3121
3122
3123     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
3124     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3125     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3126
3127     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3128     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3129
3130     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
3131
3132     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3133     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
3134
3135     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
3136     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3137
3138     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3139
3140     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3141
3142     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3143
3144     my $ipset_ruleset = {};
3145
3146     if ($hostfw_enable) {
3147         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3148         warn $@ if $@; # just to be sure - should not happen
3149     }
3150
3151     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3152
3153     # generate firewall rules for QEMU VMs
3154     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3155         eval {
3156             my $conf = $vmdata->{qemu}->{$vmid};
3157             my $vmfw_conf = $vmfw_configs->{$vmid};
3158             return if !$vmfw_conf;
3159
3160             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3161
3162             foreach my $netid (keys %$conf) {
3163                 next if $netid !~ m/^net(\d+)$/;
3164                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3165                 next if !$net->{firewall};
3166                 my $iface = "tap${vmid}i$1";
3167
3168                 my $macaddr = $net->{macaddr};
3169                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3170                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3171                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3172                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3173             }
3174         };
3175         warn $@ if $@; # just to be sure - should not happen
3176     }
3177
3178     # generate firewall rules for OpenVZ containers
3179     foreach my $vmid (keys %{$vmdata->{openvz}}) {
3180         eval {
3181             my $conf = $vmdata->{openvz}->{$vmid};
3182
3183             my $vmfw_conf = $vmfw_configs->{$vmid};
3184             return if !$vmfw_conf;
3185
3186             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3187
3188             if ($vmfw_conf->{options}->{enable}) {
3189                 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
3190                     my $ip = $conf->{ip_address}->{value};
3191                     $ip =~ s/\s+/,/g;
3192
3193                     my @ips = ();
3194
3195                     foreach my $singleip (split(',', $ip)) {
3196                         my $singleip_ver = parse_address_list($singleip); # make sure we have a valid $ip list
3197                         push @{$cluster_conf->{ipset}->{venet0}}, { cidr => $singleip };
3198                         push @ips, $singleip if $singleip_ver == $ipversion;
3199                     }
3200
3201                     if (scalar(@ips)) {
3202                         my $ip_list = join(',', @ips);
3203                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'IN', $ipversion);
3204                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'OUT', $ipversion);
3205                     }
3206                 }
3207             }
3208
3209             if ($conf->{netif} && $conf->{netif}->{value}) {
3210                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
3211                 foreach my $netid (keys %$netif) {
3212                     my $d = $netif->{$netid};
3213                     my $bridge = $d->{bridge};
3214                     next if !$bridge || $bridge !~ m/^vmbr\d+(v(\d+))?f$/; # firewall enabled ?
3215                     my $macaddr = $d->{mac};
3216                     my $iface = $d->{host_ifname};
3217                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3218                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3219                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3220                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3221                 }
3222             }
3223         };
3224         warn $@ if $@; # just to be sure - should not happen
3225     }
3226
3227     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3228         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3229     }
3230
3231     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf);
3232
3233     return ($ruleset, $ipset_ruleset);
3234 }
3235
3236 sub get_ruleset_status {
3237     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3238
3239     my $statushash = {};
3240
3241     foreach my $chain (sort keys %$ruleset) {
3242         my $sig = &$digest_fn($ruleset->{$chain});
3243
3244         $statushash->{$chain}->{sig} = $sig;
3245
3246         my $oldsig = $active_chains->{$chain};
3247         if (!defined($oldsig)) {
3248             $statushash->{$chain}->{action} = 'create';
3249         } else {
3250             if ($oldsig eq $sig) {
3251                 $statushash->{$chain}->{action} = 'exists';
3252             } else {
3253                 $statushash->{$chain}->{action} = 'update';
3254             }
3255         }
3256         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3257         foreach my $cmd (@{$ruleset->{$chain}}) {
3258             print "\t$cmd\n" if $verbose;
3259         }
3260     }
3261
3262     foreach my $chain (sort keys %$active_chains) {
3263         if (!defined($ruleset->{$chain})) {
3264             my $sig = $active_chains->{$chain};
3265             $statushash->{$chain}->{action} = 'delete';
3266             $statushash->{$chain}->{sig} = $sig;
3267             print "delete $chain ($sig)\n" if $verbose;
3268         }
3269     }
3270
3271     return $statushash;
3272 }
3273
3274 sub print_sig_rule {
3275     my ($chain, $sig) = @_;
3276
3277     # We just use this to store a SHA1 checksum used to detect changes
3278     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3279 }
3280
3281 sub get_ruleset_cmdlist {
3282     my ($ruleset, $verbose, $iptablescmd) = @_;
3283
3284     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3285
3286     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3287     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3288
3289     # create missing chains first
3290     foreach my $chain (sort keys %$ruleset) {
3291         my $stat = $statushash->{$chain};
3292         die "internal error" if !$stat;
3293         next if $stat->{action} ne 'create';
3294
3295         $cmdlist .= ":$chain - [0:0]\n";
3296     }
3297
3298     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3299         my $chain = "PVEFW-$h";
3300         if ($ruleset->{$chain} && !$hooks->{$h}) {
3301             $cmdlist .= "-A $h -j $chain\n";
3302         }
3303     }
3304
3305     foreach my $chain (sort keys %$ruleset) {
3306         my $stat = $statushash->{$chain};
3307         die "internal error" if !$stat;
3308
3309         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3310             $cmdlist .= "-F $chain\n";
3311             foreach my $cmd (@{$ruleset->{$chain}}) {
3312                 $cmdlist .= "$cmd\n";
3313             }
3314             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3315         } elsif ($stat->{action} eq 'delete') {
3316             die "internal error"; # this should not happen
3317         } elsif ($stat->{action} eq 'exists') {
3318             # do nothing
3319         } else {
3320             die "internal error - unknown status '$stat->{action}'";
3321         }
3322     }
3323
3324     foreach my $chain (keys %$statushash) {
3325         next if $statushash->{$chain}->{action} ne 'delete';
3326         $cmdlist .= "-F $chain\n";
3327     }
3328     foreach my $chain (keys %$statushash) {
3329         next if $statushash->{$chain}->{action} ne 'delete';
3330         next if $chain eq 'PVEFW-INPUT';
3331         next if $chain eq 'PVEFW-OUTPUT';
3332         next if $chain eq 'PVEFW-FORWARD';
3333         $cmdlist .= "-X $chain\n";
3334     }
3335
3336     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3337
3338     $cmdlist .= "COMMIT\n";
3339
3340     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3341 }
3342
3343 sub get_ipset_cmdlist {
3344     my ($ruleset, $verbose) = @_;
3345
3346     my $cmdlist = "";
3347
3348     my $delete_cmdlist = "";
3349
3350     my $active_chains = ipset_get_chains();
3351     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3352
3353     # remove stale _swap chains
3354     foreach my $chain (keys %$active_chains) {
3355         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3356             $cmdlist .= "destroy $chain\n";
3357         }
3358     }
3359
3360     foreach my $chain (keys %$ruleset) {
3361         my $stat = $statushash->{$chain};
3362         die "internal error" if !$stat;
3363
3364         if ($stat->{action} eq 'create') {
3365             foreach my $cmd (@{$ruleset->{$chain}}) {
3366                 $cmdlist .= "$cmd\n";
3367             }
3368         }
3369     }
3370
3371     foreach my $chain (keys %$ruleset) {
3372         my $stat = $statushash->{$chain};
3373         die "internal error" if !$stat;
3374
3375         if ($stat->{action} eq 'update') {
3376             my $chain_swap = $chain."_swap";
3377
3378             foreach my $cmd (@{$ruleset->{$chain}}) {
3379                 $cmd =~ s/$chain/$chain_swap/;
3380                 $cmdlist .= "$cmd\n";
3381             }
3382             $cmdlist .= "swap $chain_swap $chain\n";
3383             $cmdlist .= "flush $chain_swap\n";
3384             $cmdlist .= "destroy $chain_swap\n";
3385         }
3386     }
3387
3388      # the remove unused chains
3389     foreach my $chain (keys %$statushash) {
3390         next if $statushash->{$chain}->{action} ne 'delete';
3391
3392         $delete_cmdlist .= "flush $chain\n";
3393         $delete_cmdlist .= "destroy $chain\n";
3394     }
3395
3396     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3397
3398     return ($cmdlist, $delete_cmdlist, $changes);
3399 }
3400
3401 sub apply_ruleset {
3402     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3403
3404     enable_bridge_firewall();
3405
3406     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3407         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3408
3409     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3410     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3411
3412     if ($verbose) {
3413         if ($ipset_changes) {
3414             print "ipset changes:\n";
3415             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3416             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3417         }
3418
3419         if ($changes) {
3420             print "iptables changes:\n";
3421             print $cmdlist;
3422         }
3423
3424         if ($changesv6) {
3425             print "ip6tables changes:\n";
3426             print $cmdlistv6;
3427         }
3428     }
3429
3430     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3431     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3432
3433     ipset_restore_cmdlist($ipset_create_cmdlist);
3434
3435     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3436     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3437
3438     iptables_restore_cmdlist($cmdlist);
3439
3440     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3441     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3442
3443     ip6tables_restore_cmdlist($cmdlistv6);
3444
3445     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3446     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3447
3448     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3449
3450     # test: re-read status and check if everything is up to date
3451     my $active_chains = iptables_get_chains();
3452     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3453
3454     my $errors;
3455     foreach my $chain (sort keys %$ruleset) {
3456         my $stat = $statushash->{$chain};
3457         if ($stat->{action} ne 'exists') {
3458             warn "unable to update chain '$chain'\n";
3459             $errors = 1;
3460         }
3461     }
3462
3463     my $active_chainsv6 = iptables_get_chains("ip6tables");
3464     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3465
3466     foreach my $chain (sort keys %$rulesetv6) {
3467         my $stat = $statushashv6->{$chain};
3468         if ($stat->{action} ne 'exists') {
3469             warn "unable to update chain '$chain'\n";
3470             $errors = 1;
3471         }
3472     }
3473
3474     die "unable to apply firewall changes\n" if $errors;
3475
3476     update_nf_conntrack_max($hostfw_conf);
3477
3478     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3479
3480 }
3481
3482 sub update_nf_conntrack_max {
3483     my ($hostfw_conf) = @_;
3484
3485     my $max = 65536; # reasonable default
3486
3487     my $options = $hostfw_conf->{options} || {};
3488
3489     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3490         $max = $options->{nf_conntrack_max};
3491         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3492     }
3493
3494     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3495     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3496
3497     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3498
3499     if ($current != $max) {
3500         my $hashsize = int($max/4);
3501         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3502         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3503     }
3504 }
3505
3506 sub update_nf_conntrack_tcp_timeout_established {
3507     my ($hostfw_conf) = @_;
3508
3509     my $options = $hostfw_conf->{options} || {};
3510
3511     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3512
3513     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3514 }
3515
3516 sub remove_pvefw_chains {
3517
3518     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3519     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3520     PVE::Firewall::remove_pvefw_chains_ipset();
3521
3522 }
3523
3524 sub remove_pvefw_chains_iptables {
3525     my ($iptablescmd) = @_;
3526
3527     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3528     my $cmdlist = "*filter\n";
3529
3530     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3531         if ($hooks->{$h}) {
3532             $cmdlist .= "-D $h -j PVEFW-$h\n";
3533         }
3534     }
3535
3536     foreach my $chain (keys %$chash) {
3537         $cmdlist .= "-F $chain\n";
3538     }
3539
3540     foreach my $chain (keys %$chash) {
3541         $cmdlist .= "-X $chain\n";
3542     }
3543     $cmdlist .= "COMMIT\n";
3544
3545     if($iptablescmd eq "ip6tables") {
3546         ip6tables_restore_cmdlist($cmdlist);
3547     } else {
3548         iptables_restore_cmdlist($cmdlist);
3549     }
3550 }
3551
3552 sub remove_pvefw_chains_ipset {
3553
3554     my $ipset_chains = ipset_get_chains();
3555
3556     my $cmdlist = "";
3557
3558     foreach my $chain (keys %$ipset_chains) {
3559         $cmdlist .= "flush $chain\n";
3560         $cmdlist .= "destroy $chain\n";
3561     }
3562
3563     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3564 }
3565
3566 sub init {
3567     my $cluster_conf = load_clusterfw_conf();
3568     my $cluster_options = $cluster_conf->{options};
3569     my $enable = $cluster_options->{enable};
3570
3571     return if !$enable;
3572
3573     # load required modules here
3574 }
3575
3576 sub update {
3577     my $code = sub {
3578
3579         my $cluster_conf = load_clusterfw_conf();
3580         my $cluster_options = $cluster_conf->{options};
3581
3582         if (!$cluster_options->{enable}) {
3583             PVE::Firewall::remove_pvefw_chains();
3584             return;
3585         }
3586
3587         my $hostfw_conf = load_hostfw_conf($cluster_conf);
3588
3589         my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3590
3591         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3592     };
3593
3594     run_locked($code);
3595 }
3596
3597 1;