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