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 PVE::INotify;
   9 use PVE::Exception qw(raise raise_param_exc);
  10 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  11 use PVE::Cluster;
  12 use PVE::ProcFSTools;
  13 use PVE::Tools qw($IPV4RE);
  14 use File::Basename;
  15 use File::Path;
  16 use IO::File;
  17 use Net::IP;
  18 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  19 use Encode;
  20
  21 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  22 my $clusterfw_conf_filename = "/etc/pve/firewall/cluster.fw";
  23
  24 # dynamically include PVE::QemuServer and PVE::OpenVZ
  25 # to avoid dependency problems
  26 my $have_qemu_server;
  27 eval {
  28     require PVE::QemuServer;
  29     $have_qemu_server = 1;
  30 };
  31
  32 my $have_pve_manager;
  33 eval {
  34     require PVE::OpenVZ;
  35     $have_pve_manager = 1;
  36 };
  37
  38 PVE::JSONSchema::register_format('IPv4orCIDR', \&pve_verify_ipv4_or_cidr);
  39 sub pve_verify_ipv4_or_cidr {
  40     my ($cidr, $noerr) = @_;
  41
  42     if ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
  43         return $cidr if Net::IP->new($cidr);
  44         return undef if $noerr;
  45         die Net::IP::Error() . "\n";
  46     }
  47     return undef if $noerr;
  48     die "value does not look like a valid IP address or CIDR network\n";
  49 }
  50
  51 PVE::JSONSchema::register_standard_option('ipset-name', {
  52     description => "IP set name.",
  53     type => 'string',
  54     pattern => '[A-Za-z][A-Za-z0-9\-\_]+',
  55     minLength => 2,
  56     maxLength => 20,
  57 });
  58
  59 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  60     description => "Alias name.",
  61     type => 'string',
  62     pattern => '[A-Za-z][A-Za-z0-9\-\_]+',
  63     minLength => 2,
  64     maxLength => 20,
  65 });
  66
  67 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  68     description => "Log level.",
  69     type => 'string',
  70     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  71     optional => 1,
  72 });
  73
  74 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  75 my $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  76
  77 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
  78     description => "Security Group name.",
  79     type => 'string',
  80     pattern => $security_group_name_pattern,
  81     minLength => 2,
  82     maxLength => 20,
  83 });
  84
  85 my $feature_ipset_nomatch = 0;
  86 eval  {
  87     my (undef, undef, $release) = POSIX::uname();
  88     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
  89         my ($major, $minor) = ($1, $2);
  90         $feature_ipset_nomatch = 1 if ($major > 3) ||
  91             ($major == 3 && $minor >= 7);
  92     }
  93
  94 };
  95
  96 use Data::Dumper;
  97
  98 my $nodename = PVE::INotify::nodename();
  99
 100 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 101
 102 my $default_log_level = 'nolog'; # avoid logs by default
 103
 104 my $log_level_hash = {
 105     debug => 7,
 106     info => 6,
 107     notice => 5,
 108     warning => 4,
 109     err => 3,
 110     crit => 2,
 111     alert => 1,
 112     emerg => 0,
 113 };
 114
 115 # imported/converted from: /usr/share/shorewall/macro.*
 116 my $pve_fw_macros = {
 117     'Amanda' => [
 118         "Amanda Backup",
 119         { action => 'PARAM', proto => 'udp', dport => '10080' },
 120         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 121     ],
 122     'Auth' => [
 123         "Auth (identd) traffic",
 124         { action => 'PARAM', proto => 'tcp', dport => '113' },
 125     ],
 126     'BGP' => [
 127         "Border Gateway Protocol traffic",
 128         { action => 'PARAM', proto => 'tcp', dport => '179' },
 129     ],
 130     'BitTorrent' => [
 131         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 132         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 133         { action => 'PARAM', proto => 'udp', dport => '6881' },
 134     ],
 135     'BitTorrent32' => [
 136         "BitTorrent traffic for BitTorrent 3.2 and later",
 137         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 138         { action => 'PARAM', proto => 'udp', dport => '6881' },
 139     ],
 140     'CVS' => [
 141         "Concurrent Versions System pserver traffic",
 142         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 143     ],
 144     'Citrix' => [
 145         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 146         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 147         { action => 'PARAM', proto => 'udp', dport => '1604' },
 148         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 149     ],
 150     'DAAP' => [
 151         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 152         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 153         { action => 'PARAM', proto => 'udp', dport => '3689' },
 154     ],
 155     'DCC' => [
 156         "Distributed Checksum Clearinghouse spam filtering mechanism",
 157         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 158     ],
 159     'DHCPfwd' => [
 160         "Forwarded DHCP traffic",
 161         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 162     ],
 163     'DNS' => [
 164         "Domain Name System traffic (upd and tcp)",
 165         { action => 'PARAM', proto => 'udp', dport => '53' },
 166         { action => 'PARAM', proto => 'tcp', dport => '53' },
 167     ],
 168     'Distcc' => [
 169         "Distributed Compiler service",
 170         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 171     ],
 172     'FTP' => [
 173         "File Transfer Protocol",
 174         { action => 'PARAM', proto => 'tcp', dport => '21' },
 175     ],
 176     'Finger' => [
 177         "Finger protocol (RFC 742)",
 178         { action => 'PARAM', proto => 'tcp', dport => '79' },
 179     ],
 180     'GNUnet' => [
 181         "GNUnet secure peer-to-peer networking traffic",
 182         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 183         { action => 'PARAM', proto => 'udp', dport => '2086' },
 184         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 185         { action => 'PARAM', proto => 'udp', dport => '1080' },
 186     ],
 187     'GRE' => [
 188         "Generic Routing Encapsulation tunneling protocol",
 189         { action => 'PARAM', proto => '47' },
 190     ],
 191     'Git' => [
 192         "Git distributed revision control traffic",
 193         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 194     ],
 195     'HKP' => [
 196         "OpenPGP HTTP keyserver protocol traffic",
 197         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 198     ],
 199     'HTTP' => [
 200         "Hypertext Transfer Protocol (WWW)",
 201         { action => 'PARAM', proto => 'tcp', dport => '80' },
 202     ],
 203     'HTTPS' => [
 204         "Hypertext Transfer Protocol (WWW) over SSL",
 205         { action => 'PARAM', proto => 'tcp', dport => '443' },
 206     ],
 207     'ICPV2' => [
 208         "Internet Cache Protocol V2 (Squid) traffic",
 209         { action => 'PARAM', proto => 'udp', dport => '3130' },
 210     ],
 211     'ICQ' => [
 212         "AOL Instant Messenger traffic",
 213         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 214     ],
 215     'IMAP' => [
 216         "Internet Message Access Protocol",
 217         { action => 'PARAM', proto => 'tcp', dport => '143' },
 218     ],
 219     'IMAPS' => [
 220         "Internet Message Access Protocol over SSL",
 221         { action => 'PARAM', proto => 'tcp', dport => '993' },
 222     ],
 223     'IPIP' => [
 224         "IPIP capsulation traffic",
 225         { action => 'PARAM', proto => '94' },
 226     ],
 227     'IPsec' => [
 228         "IPsec traffic",
 229         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 230         { action => 'PARAM', proto => '50' },
 231     ],
 232     'IPsecah' => [
 233         "IPsec authentication (AH) traffic",
 234         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 235         { action => 'PARAM', proto => '51' },
 236     ],
 237     'IPsecnat' => [
 238         "IPsec traffic and Nat-Traversal",
 239         { action => 'PARAM', proto => 'udp', dport => '500' },
 240         { action => 'PARAM', proto => 'udp', dport => '4500' },
 241         { action => 'PARAM', proto => '50' },
 242     ],
 243     'IRC' => [
 244         "Internet Relay Chat traffic",
 245         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 246     ],
 247     'Jetdirect' => [
 248         "HP Jetdirect printing",
 249         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 250     ],
 251     'L2TP' => [
 252         "Layer 2 Tunneling Protocol traffic",
 253         { action => 'PARAM', proto => 'udp', dport => '1701' },
 254     ],
 255     'LDAP' => [
 256         "Lightweight Directory Access Protocol traffic",
 257         { action => 'PARAM', proto => 'tcp', dport => '389' },
 258     ],
 259     'LDAPS' => [
 260         "Secure Lightweight Directory Access Protocol traffic",
 261         { action => 'PARAM', proto => 'tcp', dport => '636' },
 262     ],
 263     'MSNP' => [
 264         "Microsoft Notification Protocol",
 265         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 266     ],
 267     'MSSQL' => [
 268         "Microsoft SQL Server",
 269         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 270     ],
 271     'Mail' => [
 272         "Mail traffic (SMTP, SMTPS, Submission)",
 273         { action => 'PARAM', proto => 'tcp', dport => '25' },
 274         { action => 'PARAM', proto => 'tcp', dport => '465' },
 275         { action => 'PARAM', proto => 'tcp', dport => '587' },
 276     ],
 277     'Munin' => [
 278         "Munin networked resource monitoring traffic",
 279         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 280     ],
 281     'MySQL' => [
 282         "MySQL server",
 283         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 284     ],
 285     'NNTP' => [
 286         "NNTP traffic (Usenet).",
 287         { action => 'PARAM', proto => 'tcp', dport => '119' },
 288     ],
 289     'NNTPS' => [
 290         "Encrypted NNTP traffic (Usenet)",
 291         { action => 'PARAM', proto => 'tcp', dport => '563' },
 292     ],
 293     'NTP' => [
 294         "Network Time Protocol (ntpd)",
 295         { action => 'PARAM', proto => 'udp', dport => '123' },
 296     ],
 297     'OSPF' => [
 298         "OSPF multicast traffic",
 299         { action => 'PARAM', proto => '89' },
 300     ],
 301     'OpenVPN' => [
 302         "OpenVPN traffic",
 303         { action => 'PARAM', proto => 'udp', dport => '1194' },
 304     ],
 305     'PCA' => [
 306         "Symantec PCAnywere (tm)",
 307         { action => 'PARAM', proto => 'udp', dport => '5632' },
 308         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 309     ],
 310     'POP3' => [
 311         "POP3 traffic",
 312         { action => 'PARAM', proto => 'tcp', dport => '110' },
 313     ],
 314     'POP3S' => [
 315         "Encrypted POP3 traffic",
 316         { action => 'PARAM', proto => 'tcp', dport => '995' },
 317     ],
 318     'PPtP' => [
 319         "Point-to-Point Tunneling Protocol",
 320         { action => 'PARAM', proto => '47' },
 321         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 322     ],
 323     'Ping' => [
 324         "ICMP echo request",
 325         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 326     ],
 327     'PostgreSQL' => [
 328         "PostgreSQL server",
 329         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 330     ],
 331     'Printer' => [
 332         "Line Printer protocol printing",
 333         { action => 'PARAM', proto => 'tcp', dport => '515' },
 334     ],
 335     'RDP' => [
 336         "Microsoft Remote Desktop Protocol traffic",
 337         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 338     ],
 339     'RIP' => [
 340         "Routing Information Protocol (bidirectional)",
 341         { action => 'PARAM', proto => 'udp', dport => '520' },
 342     ],
 343     'RNDC' => [
 344         "BIND remote management protocol",
 345         { action => 'PARAM', proto => 'tcp', dport => '953' },
 346     ],
 347     'Razor' => [
 348         "Razor Antispam System",
 349         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 350     ],
 351     'Rdate' => [
 352         "Remote time retrieval (rdate)",
 353         { action => 'PARAM', proto => 'tcp', dport => '37' },
 354     ],
 355     'Rsync' => [
 356         "Rsync server",
 357         { action => 'PARAM', proto => 'tcp', dport => '873' },
 358     ],
 359     'SANE' => [
 360         "SANE network scanning",
 361         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 362     ],
 363     'SMB' => [
 364         "Microsoft SMB traffic",
 365         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 366         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 367         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 368         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 369     ],
 370     'SMBswat' => [
 371         "Samba Web Administration Tool",
 372         { action => 'PARAM', proto => 'tcp', dport => '901' },
 373     ],
 374     'SMTP' => [
 375         "Simple Mail Transfer Protocol",
 376         { action => 'PARAM', proto => 'tcp', dport => '25' },
 377     ],
 378     'SMTPS' => [
 379         "Encrypted Simple Mail Transfer Protocol",
 380         { action => 'PARAM', proto => 'tcp', dport => '465' },
 381     ],
 382     'SNMP' => [
 383         "Simple Network Management Protocol",
 384         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 385         { action => 'PARAM', proto => 'tcp', dport => '161' },
 386     ],
 387     'SPAMD' => [
 388         "Spam Assassin SPAMD traffic",
 389         { action => 'PARAM', proto => 'tcp', dport => '783' },
 390     ],
 391     'SSH' => [
 392         "Secure shell traffic",
 393         { action => 'PARAM', proto => 'tcp', dport => '22' },
 394     ],
 395     'SVN' => [
 396         "Subversion server (svnserve)",
 397         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 398     ],
 399     'SixXS' => [
 400         "SixXS IPv6 Deployment and Tunnel Broker",
 401         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 402         { action => 'PARAM', proto => 'udp', dport => '3740' },
 403         { action => 'PARAM', proto => '41' },
 404         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 405     ],
 406     'Squid' => [
 407         "Squid web proxy traffic",
 408         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 409     ],
 410     'Submission' => [
 411         "Mail message submission traffic",
 412         { action => 'PARAM', proto => 'tcp', dport => '587' },
 413     ],
 414     'Syslog' => [
 415         "Syslog protocol (RFC 5424) traffic",
 416         { action => 'PARAM', proto => 'udp', dport => '514' },
 417         { action => 'PARAM', proto => 'tcp', dport => '514' },
 418     ],
 419     'TFTP' => [
 420         "Trivial File Transfer Protocol traffic",
 421         { action => 'PARAM', proto => 'udp', dport => '69' },
 422     ],
 423     'Telnet' => [
 424         "Telnet traffic",
 425         { action => 'PARAM', proto => 'tcp', dport => '23' },
 426     ],
 427     'Telnets' => [
 428         "Telnet over SSL",
 429         { action => 'PARAM', proto => 'tcp', dport => '992' },
 430     ],
 431     'Time' => [
 432         "RFC 868 Time protocol",
 433         { action => 'PARAM', proto => 'tcp', dport => '37' },
 434     ],
 435     'Trcrt' => [
 436         "Traceroute (for up to 30 hops) traffic",
 437         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 438         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 439     ],
 440     'VNC' => [
 441         "VNC traffic for VNC display's 0 - 99",
 442         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 443     ],
 444     'VNCL' => [
 445         "VNC traffic from Vncservers to Vncviewers in listen mode",
 446         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 447     ],
 448     'Web' => [
 449         "WWW traffic (HTTP and HTTPS)",
 450         { action => 'PARAM', proto => 'tcp', dport => '80' },
 451         { action => 'PARAM', proto => 'tcp', dport => '443' },
 452     ],
 453     'Webcache' => [
 454         "Web Cache/Proxy traffic (port 8080)",
 455         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 456     ],
 457     'Webmin' => [
 458         "Webmin traffic",
 459         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 460     ],
 461     'Whois' => [
 462         "Whois (nicname, RFC 3912) traffic",
 463         { action => 'PARAM', proto => 'tcp', dport => '43' },
 464     ],
 465 };
 466
 467 my $pve_fw_parsed_macros;
 468 my $pve_fw_macro_descr;
 469 my $pve_fw_preferred_macro_names = {};
 470
 471 my $pve_std_chains = {
 472     'PVEFW-SET-ACCEPT-MARK' => [
 473         "-j MARK --set-mark 1",
 474     ],
 475     'PVEFW-DropBroadcast' => [
 476         # same as shorewall 'Broadcast'
 477         # simply DROP BROADCAST/MULTICAST/ANYCAST
 478         # we can use this to reduce logging
 479         { action => 'DROP', dsttype => 'BROADCAST' },
 480         { action => 'DROP', dsttype => 'MULTICAST' },
 481         { action => 'DROP', dsttype => 'ANYCAST' },
 482         { action => 'DROP', dest => '224.0.0.0/4' },
 483     ],
 484     'PVEFW-reject' => [
 485         # same as shorewall 'reject'
 486         { action => 'DROP', dsttype => 'BROADCAST' },
 487         { action => 'DROP', source => '224.0.0.0/4' },
 488         { action => 'DROP', proto => 'icmp' },
 489         "-p tcp -j REJECT --reject-with tcp-reset",
 490         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 491         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 492         "-j REJECT --reject-with icmp-host-prohibited",
 493     ],
 494     'PVEFW-Drop' => [
 495         # same as shorewall 'Drop', which is equal to DROP,
 496         # but REJECT/DROP some packages to reduce logging,
 497         # and ACCEPT critical ICMP types
 498         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 499         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 500         { action => 'PVEFW-DropBroadcast' },
 501         # ACCEPT critical ICMP types
 502         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 503         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 504         # Drop packets with INVALID state
 505         "-m conntrack --ctstate INVALID -j DROP",
 506         # Drop Microsoft SMB noise
 507         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 508         { action => 'DROP', proto => 'udp', dport => '137:139'},
 509         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 510         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 511         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 512         # Drop new/NotSyn traffic so that it doesn't get logged
 513         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 514         # Drop DNS replies
 515         { action => 'DROP', proto => 'udp', sport => 53 },
 516     ],
 517     'PVEFW-Reject' => [
 518         # same as shorewall 'Reject', which is equal to Reject,
 519         # but REJECT/DROP some packages to reduce logging,
 520         # and ACCEPT critical ICMP types
 521         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 522         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 523         { action => 'PVEFW-DropBroadcast' },
 524         # ACCEPT critical ICMP types
 525         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 526         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 527         # Drop packets with INVALID state
 528         "-m conntrack --ctstate INVALID -j DROP",
 529         # Drop Microsoft SMB noise
 530         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 531         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 532         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 533         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 534         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 535         # Drop new/NotSyn traffic so that it doesn't get logged
 536         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 537         # Drop DNS replies
 538         { action => 'DROP', proto => 'udp', sport => 53 },
 539     ],
 540     'PVEFW-tcpflags' => [
 541         # same as shorewall tcpflags action.
 542         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 543         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 544         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 545         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 546         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 547         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 548     ],
 549     'PVEFW-smurfs' => [
 550         # same as shorewall smurfs action
 551         # Filter packets for smurfs (packets with a broadcast address as the source).
 552         "-s 0.0.0.0/32 -j RETURN",
 553         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 554         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 555     ],
 556 };
 557
 558 # iptables -p icmp -h
 559 my $icmp_type_names = {
 560     any => 1,
 561     'echo-reply' => 1,
 562     'destination-unreachable' => 1,
 563     'network-unreachable' => 1,
 564     'host-unreachable' => 1,
 565     'protocol-unreachable' => 1,
 566     'port-unreachable' => 1,
 567     'fragmentation-needed' => 1,
 568     'source-route-failed' => 1,
 569     'network-unknown' => 1,
 570     'host-unknown' => 1,
 571     'network-prohibited' => 1,
 572     'host-prohibited' => 1,
 573     'TOS-network-unreachable' => 1,
 574     'TOS-host-unreachable' => 1,
 575     'communication-prohibited' => 1,
 576     'host-precedence-violation' => 1,
 577     'precedence-cutoff' => 1,
 578     'source-quench' => 1,
 579     'redirect' => 1,
 580     'network-redirect' => 1,
 581     'host-redirect' => 1,
 582     'TOS-network-redirect' => 1,
 583     'TOS-host-redirect' => 1,
 584     'echo-request' => 1,
 585     'router-advertisement' => 1,
 586     'router-solicitation' => 1,
 587     'time-exceeded' => 1,
 588     'ttl-zero-during-transit' => 1,
 589     'ttl-zero-during-reassembly' => 1,
 590     'parameter-problem' => 1,
 591     'ip-header-bad' => 1,
 592     'required-option-missing' => 1,
 593     'timestamp-request' => 1,
 594     'timestamp-reply' => 1,
 595     'address-mask-request' => 1,
 596     'address-mask-reply' => 1,
 597 };
 598
 599 sub init_firewall_macros {
 600
 601     $pve_fw_parsed_macros = {};
 602
 603     foreach my $k (keys %$pve_fw_macros) {
 604         my $lc_name = lc($k);
 605         my $macro = $pve_fw_macros->{$k};
 606         if (!ref($macro->[0])) {
 607             $pve_fw_macro_descr->{$k} = shift @$macro;
 608         }
 609         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 610         $pve_fw_parsed_macros->{$k} = $macro;
 611     }
 612 }
 613
 614 init_firewall_macros();
 615
 616 sub get_macros {
 617     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 618 }
 619
 620 my $etc_services;
 621
 622 sub get_etc_services {
 623
 624     return $etc_services if $etc_services;
 625
 626     my $filename = "/etc/services";
 627
 628     my $fh = IO::File->new($filename, O_RDONLY);
 629     if (!$fh) {
 630         warn "unable to read '$filename' - $!\n";
 631         return {};
 632     }
 633
 634     my $services = {};
 635
 636     while (my $line = <$fh>) {
 637         chomp ($line);
 638         next if $line =~m/^#/;
 639         next if ($line =~m/^\s*$/);
 640
 641         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 642             $services->{byid}->{$2}->{name} = $1;
 643             $services->{byid}->{$2}->{port} = $2;
 644             $services->{byid}->{$2}->{$3} = 1;
 645             $services->{byname}->{$1} = $services->{byid}->{$2};
 646         }
 647     }
 648
 649     close($fh);
 650
 651     $etc_services = $services;
 652
 653
 654     return $etc_services;
 655 }
 656
 657 my $etc_protocols;
 658
 659 sub get_etc_protocols {
 660     return $etc_protocols if $etc_protocols;
 661
 662     my $filename = "/etc/protocols";
 663
 664     my $fh = IO::File->new($filename, O_RDONLY);
 665     if (!$fh) {
 666         warn "unable to read '$filename' - $!\n";
 667         return {};
 668     }
 669
 670     my $protocols = {};
 671
 672     while (my $line = <$fh>) {
 673         chomp ($line);
 674         next if $line =~m/^#/;
 675         next if ($line =~m/^\s*$/);
 676
 677         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 678             $protocols->{byid}->{$2}->{name} = $1;
 679             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 680         }
 681     }
 682
 683     close($fh);
 684
 685     $etc_protocols = $protocols;
 686
 687     return $etc_protocols;
 688 }
 689
 690 my $ipv4_mask_hash_localnet = {
 691     '255.255.0.0' => 16,
 692     '255.255.128.0' => 17,
 693     '255.255.192.0' => 18,
 694     '255.255.224.0' => 19,
 695     '255.255.240.0' => 20,
 696     '255.255.248.0' => 21,
 697     '255.255.252.0' => 22,
 698     '255.255.254.0' => 23,
 699     '255.255.255.0' => 24,
 700     '255.255.255.128' => 25,
 701     '255.255.255.192' => 26,
 702     '255.255.255.224' => 27,
 703     '255.255.255.240' => 28,
 704     '255.255.255.248' => 29,
 705     '255.255.255.252' => 30,
 706 };
 707
 708 my $__local_network;
 709
 710 sub local_network {
 711     my ($new_value) = @_;
 712
 713     $__local_network = $new_value if defined($new_value);
 714
 715     return $__local_network if defined($__local_network);
 716
 717     eval {
 718         my $nodename = PVE::INotify::nodename();
 719
 720         my $ip = PVE::Cluster::remote_node_ip($nodename);
 721
 722         my $testip = Net::IP->new($ip);
 723
 724         my $routes = PVE::ProcFSTools::read_proc_net_route();
 725         foreach my $entry (@$routes) {
 726             my $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 727             next if !defined($mask);
 728             return if $mask eq '0.0.0.0';
 729             my $cidr = "$entry->{dest}/$mask";
 730             my $testnet = Net::IP->new($cidr);
 731             if ($testnet->overlaps($testip)) {
 732                 $__local_network = $cidr;
 733                 return;
 734             }
 735         }
 736     };
 737     warn $@ if $@;
 738
 739     return $__local_network;
 740 }
 741
 742 sub parse_address_list {
 743     my ($str) = @_;
 744
 745     return if $str =~ m/^(\+)(\S+)$/; # ipset ref
 746     return if $str =~ m/^${ip_alias_pattern}$/;
 747
 748     my $count = 0;
 749     my $iprange = 0;
 750     foreach my $elem (split(/,/, $str)) {
 751         $count++;
 752         if (!Net::IP->new($elem)) {
 753             my $err = Net::IP::Error();
 754             die "invalid IP address: $err\n";
 755         }
 756         $iprange = 1 if $elem =~ m/-/;
 757     }
 758
 759     die "you can use a range in a list\n" if $iprange && $count > 1;
 760 }
 761
 762 sub parse_port_name_number_or_range {
 763     my ($str) = @_;
 764
 765     my $services = PVE::Firewall::get_etc_services();
 766     my $count = 0;
 767     my $icmp_port = 0;
 768
 769     foreach my $item (split(/,/, $str)) {
 770         $count++;
 771         if ($item =~ m/^(\d+):(\d+)$/) {
 772             my ($port1, $port2) = ($1, $2);
 773             die "invalid port '$port1'\n" if $port1 > 65535;
 774             die "invalid port '$port2'\n" if $port2 > 65535;
 775         } elsif ($item =~ m/^(\d+)$/) {
 776             my $port = $1;
 777             die "invalid port '$port'\n" if $port > 65535;
 778         } else {
 779             if ($icmp_type_names->{$item}) {
 780                 $icmp_port = 1;
 781             } else {
 782                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 783             }
 784         }
 785     }
 786
 787     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 788
 789     return $count;
 790 }
 791
 792 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 793 sub pve_fw_verify_port_spec {
 794    my ($portstr) = @_;
 795
 796    parse_port_name_number_or_range($portstr);
 797
 798    return $portstr;
 799 }
 800
 801 PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
 802 sub pve_fw_verify_v4addr_spec {
 803    my ($list) = @_;
 804
 805    parse_address_list($list);
 806
 807    return $list;
 808 }
 809
 810 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 811 sub pve_fw_verify_protocol_spec {
 812    my ($proto) = @_;
 813
 814    my $protocols = get_etc_protocols();
 815
 816    die "unknown protocol '$proto'\n" if $proto &&
 817        !(defined($protocols->{byname}->{$proto}) ||
 818          defined($protocols->{byid}->{$proto}));
 819
 820    return $proto;
 821 }
 822
 823
 824 # helper function for API
 825
 826 sub copy_opject_with_digest {
 827     my ($object) = @_;
 828
 829     my $sha = Digest::SHA->new('sha1');
 830
 831     my $res = {};
 832     foreach my $k (sort keys %$object) {
 833         my $v = $object->{$k};
 834         next if !defined($v);
 835         $res->{$k} = $v;
 836         $sha->add($k, ':', $v, "\n");
 837     }
 838
 839     my $digest = $sha->hexdigest;
 840
 841     $res->{digest} = $digest;
 842
 843     return wantarray ? ($res, $digest) : $res;
 844 }
 845
 846 sub copy_list_with_digest {
 847     my ($list) = @_;
 848
 849     my $sha = Digest::SHA->new('sha1');
 850
 851     my $res = [];
 852     foreach my $entry (@$list) {
 853         my $data = {};
 854         foreach my $k (sort keys %$entry) {
 855             my $v = $entry->{$k};
 856             next if !defined($v);
 857             $data->{$k} = $v;
 858             # Note: digest ignores refs ($rule->{errors})
 859             $sha->add($k, ':', $v, "\n") if !ref($v); ;
 860         }
 861         push @$res, $data;
 862     }
 863
 864     my $digest = $sha->hexdigest;
 865
 866     foreach my $entry (@$res) {
 867         $entry->{digest} = $digest;
 868     }
 869
 870     return wantarray ? ($res, $digest) : $res;
 871 }
 872
 873 my $rule_properties = {
 874     pos => {
 875         description => "Update rule at position <pos>.",
 876         type => 'integer',
 877         minimum => 0,
 878         optional => 1,
 879     },
 880     digest => get_standard_option('pve-config-digest'),
 881     type => {
 882         type => 'string',
 883         optional => 1,
 884         enum => ['in', 'out', 'group'],
 885     },
 886     action => {
 887         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
 888         type => 'string',
 889         optional => 1,
 890         pattern => $security_group_name_pattern,
 891         maxLength => 20,
 892         minLength => 2,
 893     },
 894     macro => {
 895         type => 'string',
 896         optional => 1,
 897         maxLength => 128,
 898     },
 899     iface => get_standard_option('pve-iface', { optional => 1 }),
 900     source => {
 901         type => 'string', format => 'pve-fw-v4addr-spec',
 902         optional => 1,
 903     },
 904     dest => {
 905         type => 'string', format => 'pve-fw-v4addr-spec',
 906         optional => 1,
 907     },
 908     proto => {
 909         type => 'string', format => 'pve-fw-protocol-spec',
 910         optional => 1,
 911     },
 912     enable => {
 913         type => 'boolean',
 914         optional => 1,
 915     },
 916     sport => {
 917         type => 'string', format => 'pve-fw-port-spec',
 918         optional => 1,
 919     },
 920     dport => {
 921         type => 'string', format => 'pve-fw-port-spec',
 922         optional => 1,
 923     },
 924     comment => {
 925         type => 'string',
 926         optional => 1,
 927     },
 928 };
 929
 930 sub add_rule_properties {
 931     my ($properties) = @_;
 932
 933     foreach my $k (keys %$rule_properties) {
 934         my $h = $rule_properties->{$k};
 935         # copy data, so that we can modify later without side effects
 936         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
 937     }
 938
 939     return $properties;
 940 }
 941
 942 sub delete_rule_properties {
 943     my ($rule, $delete_str) = @_;
 944
 945     foreach my $opt (PVE::Tools::split_list($delete_str)) {
 946         raise_param_exc({ 'delete' => "no such property ('$opt')"})
 947             if !defined($rule_properties->{$opt});
 948         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
 949             if $opt eq 'type' || $opt eq 'action';
 950         delete $rule->{$opt};
 951     }
 952
 953     return $rule;
 954 }
 955
 956 my $apply_macro = sub {
 957     my ($macro_name, $param, $verify) = @_;
 958
 959     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
 960     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
 961
 962     my $rules = [];
 963
 964     foreach my $templ (@$macro_rules) {
 965         my $rule = {};
 966         my $param_used = {};
 967         foreach my $k (keys %$templ) {
 968             my $v = $templ->{$k};
 969             if ($v eq 'PARAM') {
 970                 $v = $param->{$k};
 971                 $param_used->{$k} = 1;
 972             } elsif ($v eq 'DEST') {
 973                 $v = $param->{dest};
 974                 $param_used->{dest} = 1;
 975             } elsif ($v eq 'SOURCE') {
 976                 $v = $param->{source};
 977                 $param_used->{source} = 1;
 978             }
 979
 980             if (!defined($v)) {
 981                 my $msg = "missing parameter '$k' in macro '$macro_name'";
 982                 raise_param_exc({ macro => $msg }) if $verify;
 983                 die "$msg\n";
 984             }
 985             $rule->{$k} = $v;
 986         }
 987         foreach my $k (keys %$param) {
 988             next if $k eq 'macro';
 989             next if !defined($param->{$k});
 990             next if $param_used->{$k};
 991             if (defined($rule->{$k})) {
 992                 if ($rule->{$k} ne $param->{$k}) {
 993                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
 994                     raise_param_exc({ $k => $msg }) if $verify;
 995                     die "$msg\n";
 996                 }
 997             } else {
 998                 $rule->{$k} = $param->{$k};
 999             }
1000         }
1001         push @$rules, $rule;
1002     }
1003
1004     return $rules;
1005 };
1006
1007 my $rule_env_iface_lookup = {
1008     'ct' => 1,
1009     'vm' => 1,
1010     'group' => 0,
1011     'cluster' => 1,
1012     'host' => 1,
1013 };
1014
1015 sub verify_rule {
1016     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1017
1018     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1019
1020     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1021     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1022
1023     my $errors = $rule->{errors} || {};
1024
1025     my $error_count = 0;
1026
1027     my $add_error = sub {
1028         my ($param, $msg)  = @_;
1029         chomp $msg;
1030         raise_param_exc({ $param => $msg }) if !$noerr;
1031         $error_count++;
1032         $errors->{$param} = $msg if !$errors->{$param};
1033     };
1034
1035     my $check_ipset_or_alias_property = sub {
1036         my ($name) = @_;
1037
1038         if (my $value = $rule->{$name}) {
1039             if ($value =~ m/^\+/) {
1040                 if ($value =~ m/^\+(${security_group_name_pattern})$/) {
1041                     &$add_error($name, "no such ipset '$1'")
1042                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1043
1044                 } else {
1045                     &$add_error($name, "invalid security group name '$value'");
1046                 }
1047             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1048                 my $alias = lc($value);
1049                 &$add_error($name, "no such alias '$value'")
1050                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}))
1051             }
1052         }
1053     };
1054
1055     my $type = $rule->{type};
1056     my $action = $rule->{action};
1057
1058     &$add_error('type', "missing property") if !$type;
1059     &$add_error('action', "missing property") if !$action;
1060
1061     if ($type) {
1062         if ($type eq  'in' || $type eq 'out') {
1063             &$add_error('action', "unknown action '$action'")
1064                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1065         } elsif ($type eq 'group') {
1066             &$add_error('type', "security groups not allowed")
1067                 if !$allow_groups;
1068             &$add_error('action', "invalid characters in security group name")
1069                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1070         } else {
1071             &$add_error('type', "unknown rule type '$type'");
1072         }
1073     }
1074
1075     if ($rule->{iface}) {
1076         &$add_error('type', "parameter -i not allowed for this rule type")
1077             if !$allow_iface;
1078         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1079         &$add_error('iface', $@) if $@;
1080         if ($rule_env eq 'vm') {
1081             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1082                 if $rule->{iface} !~  m/^net(\d+)$/;
1083         } elsif ($rule_env eq 'ct') {
1084             &$add_error('iface', "value does not match the regex pattern '(venet|eth\\d+)'")
1085                 if $rule->{iface} !~  m/^(venet|eth(\d+))$/;
1086         }
1087     }
1088
1089     if ($rule->{macro}) {
1090         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1091             $rule->{macro} = $preferred_name;
1092         } else {
1093             &$add_error('macro', "unknown macro '$rule->{macro}'");
1094         }
1095     }
1096
1097     if ($rule->{proto}) {
1098         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1099         &$add_error('proto', $@) if $@;
1100     }
1101
1102     if ($rule->{dport}) {
1103         eval { parse_port_name_number_or_range($rule->{dport}); };
1104         &$add_error('dport', $@) if $@;
1105         &$add_error('proto', "missing property - 'dport' requires this property")
1106             if !$rule->{proto};
1107     }
1108
1109     if ($rule->{sport}) {
1110         eval { parse_port_name_number_or_range($rule->{sport}); };
1111         &$add_error('sport', $@) if $@;
1112         &$add_error('proto', "missing property - 'sport' requires this property")
1113             if !$rule->{proto};
1114     }
1115
1116     if ($rule->{source}) {
1117         eval { parse_address_list($rule->{source}); };
1118         &$add_error('source', $@) if $@;
1119         &$check_ipset_or_alias_property('source');
1120     }
1121
1122     if ($rule->{dest}) {
1123         eval { parse_address_list($rule->{dest}); };
1124         &$add_error('dest', $@) if $@;
1125         &$check_ipset_or_alias_property('dest');
1126     }
1127
1128     if ($rule->{macro} && !$error_count) {
1129         eval { &$apply_macro($rule->{macro}, $rule, 1); };
1130         if (my $err = $@) {
1131             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1132                 my $eh = $err->{errors};
1133                 foreach my $p (keys %$eh) {
1134                     &$add_error($p, $eh->{$p});
1135                 }
1136             } else {
1137                 &$add_error('macro', "$err");
1138             }
1139         }
1140     }
1141
1142     $rule->{errors} = $errors if $error_count;
1143
1144     return $rule;
1145 }
1146
1147 sub copy_rule_data {
1148     my ($rule, $param) = @_;
1149
1150     foreach my $k (keys %$rule_properties) {
1151         if (defined(my $v = $param->{$k})) {
1152             if ($v eq '' || $v eq '-') {
1153                 delete $rule->{$k};
1154             } else {
1155                 $rule->{$k} = $v;
1156             }
1157         }
1158     }
1159
1160     return $rule;
1161 }
1162
1163 # core functions
1164 my $bridge_firewall_enabled = 0;
1165
1166 sub enable_bridge_firewall {
1167
1168     return if $bridge_firewall_enabled; # only once
1169
1170     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1171     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1172
1173     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1174     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1175
1176     $bridge_firewall_enabled = 1;
1177 }
1178
1179 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1180
1181 sub iptables_restore_cmdlist {
1182     my ($cmdlist) = @_;
1183
1184     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1185 }
1186
1187 sub ipset_restore_cmdlist {
1188     my ($cmdlist) = @_;
1189
1190     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1191 }
1192
1193 sub iptables_get_chains {
1194
1195     my $res = {};
1196
1197     # check what chains we want to track
1198     my $is_pvefw_chain = sub {
1199         my $name = shift;
1200
1201         return 1 if $name =~ m/^PVEFW-\S+$/;
1202
1203         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1204
1205         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1206
1207         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1208
1209         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1210         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1211
1212         return undef;
1213     };
1214
1215     my $table = '';
1216
1217     my $hooks = {};
1218
1219     my $parser = sub {
1220         my $line = shift;
1221
1222         return if $line =~ m/^#/;
1223         return if $line =~ m/^\s*$/;
1224
1225         if ($line =~ m/^\*(\S+)$/) {
1226             $table = $1;
1227             return;
1228         }
1229
1230         return if $table ne 'filter';
1231
1232         if ($line =~ m/^:(\S+)\s/) {
1233             my $chain = $1;
1234             return if !&$is_pvefw_chain($chain);
1235             $res->{$chain} = "unknown";
1236         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1237             my ($chain, $sig) = ($1, $2);
1238             return if !&$is_pvefw_chain($chain);
1239             $res->{$chain} = $sig;
1240         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1241             $hooks->{$1} = 1;
1242         } else {
1243             # simply ignore the rest
1244             return;
1245         }
1246     };
1247
1248     run_command("/sbin/iptables-save", outfunc => $parser);
1249
1250     return wantarray ? ($res, $hooks) : $res;
1251 }
1252
1253 sub iptables_chain_digest {
1254     my ($rules) = @_;
1255     my $digest = Digest::SHA->new('sha1');
1256     foreach my $rule (@$rules) { # order is important
1257         $digest->add($rule);
1258     }
1259     return $digest->b64digest;
1260 }
1261
1262 sub ipset_chain_digest {
1263     my ($rules) = @_;
1264
1265     my $digest = Digest::SHA->new('sha1');
1266     foreach my $rule (sort @$rules) { # note: sorted
1267         $digest->add($rule);
1268     }
1269     return $digest->b64digest;
1270 }
1271
1272 sub ipset_get_chains {
1273
1274     my $res = {};
1275     my $chains = {};
1276
1277     my $parser = sub {
1278         my $line = shift;
1279
1280         return if $line =~ m/^#/;
1281         return if $line =~ m/^\s*$/;
1282         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1283             my $chain = $1;
1284             $line =~ s/\s+$//; # delete trailing white space
1285             push @{$chains->{$chain}}, $line;
1286         } else {
1287             # simply ignore the rest
1288             return;
1289         }
1290     };
1291
1292     run_command("/usr/sbin/ipset save", outfunc => $parser);
1293
1294     # compute digest for each chain
1295     foreach my $chain (keys %$chains) {
1296         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1297     }
1298
1299     return $res;
1300 }
1301
1302 sub ruleset_generate_cmdstr {
1303     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1304
1305     return if defined($rule->{enable}) && !$rule->{enable};
1306     return if $rule->{errors};
1307
1308     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1309
1310     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1311     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1312
1313     my @cmd = ();
1314
1315     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1316     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1317
1318     my $source = $rule->{source};
1319     my $dest = $rule->{dest};
1320
1321     if ($source) {
1322         if ($source =~ m/^\+/) {
1323             if ($source =~ m/^\+(${security_group_name_pattern})$/) {
1324                 die "no such ipset '$1'\n" if !$cluster_conf->{ipset}->{$1};
1325                 push @cmd, "-m set --match-set PVEFW-$1 src";
1326             } else {
1327                 die "invalid security group name '$source'\n";
1328             }
1329         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1330             my $alias = lc($source);
1331             my $e = $cluster_conf->{aliases}->{$alias};
1332             die "no such alias $source\n" if !$e;
1333             push @cmd, "-s $e->{cidr}";
1334         } elsif ($source =~ m/\-/){
1335             push @cmd, "-m iprange --src-range $source";
1336
1337         } else {
1338             push @cmd, "-s $source";
1339         }
1340     }
1341
1342     if ($dest) {
1343         if ($dest =~ m/^\+/) {
1344             if ($dest =~ m/^\+(${security_group_name_pattern})$/) {
1345                 die "no such ipset '$1'\n" if !$cluster_conf->{ipset}->{$1};
1346                 push @cmd, "-m set --match-set PVEFW-$1 dst";
1347             } else {
1348                 die "invalid security group name '$dest'\n";
1349             }
1350         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1351             my $alias = lc($dest);
1352             my $e = $cluster_conf->{aliases}->{$alias};
1353             die "no such alias $dest" if !$e;
1354             push @cmd, "-d $e->{cidr}";
1355         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1356             push @cmd, "-m iprange --dst-range $dest";
1357
1358         } else {
1359             push @cmd, "-d $dest";
1360         }
1361     }
1362
1363     if ($rule->{proto}) {
1364         push @cmd, "-p $rule->{proto}";
1365
1366         my $multiport = 0;
1367         $multiport++ if $nbdport > 1;
1368         $multiport++ if $nbsport > 1;
1369
1370         push @cmd, "--match multiport" if $multiport;
1371
1372         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1373             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1374
1375         if ($rule->{dport}) {
1376             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1377                 # Note: we use dport to store --icmp-type
1378                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1379                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1380             } else {
1381                 if ($nbdport > 1) {
1382                     if ($multiport == 2) {
1383                         push @cmd,  "--ports $rule->{dport}";
1384                     } else {
1385                         push @cmd, "--dports $rule->{dport}";
1386                     }
1387                 } else {
1388                     push @cmd, "--dport $rule->{dport}";
1389                 }
1390             }
1391         }
1392
1393         if ($rule->{sport}) {
1394             if ($nbsport > 1) {
1395                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1396             } else {
1397                 push @cmd, "--sport $rule->{sport}";
1398             }
1399         }
1400     } elsif ($rule->{dport} || $rule->{sport}) {
1401         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1402         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1403     }
1404
1405     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1406
1407     if (my $action = $rule->{action}) {
1408         $action = $actions->{$action} if defined($actions->{$action});
1409         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1410         push @cmd, $goto ? "-g $action" : "-j $action";
1411     }
1412
1413     return scalar(@cmd) ? join(' ', @cmd) : undef;
1414 }
1415
1416 sub ruleset_generate_rule {
1417     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1418
1419     my $rules;
1420
1421     if ($rule->{macro}) {
1422         $rules = &$apply_macro($rule->{macro}, $rule);
1423     } else {
1424         $rules = [ $rule ];
1425     }
1426
1427     # update all or nothing
1428
1429     my @cmds = ();
1430     foreach my $tmp (@$rules) {
1431         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
1432             push @cmds, $cmdstr;
1433         }
1434     }
1435
1436     foreach my $cmdstr (@cmds) {
1437         ruleset_addrule($ruleset, $chain, $cmdstr);
1438     }
1439 }
1440
1441 sub ruleset_generate_rule_insert {
1442     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1443
1444     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1445
1446     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1447         ruleset_insertrule($ruleset, $chain, $cmdstr);
1448     }
1449 }
1450
1451 sub ruleset_create_chain {
1452     my ($ruleset, $chain) = @_;
1453
1454     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1455     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1456
1457     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1458
1459     $ruleset->{$chain} = [];
1460 }
1461
1462 sub ruleset_chain_exist {
1463     my ($ruleset, $chain) = @_;
1464
1465     return $ruleset->{$chain} ? 1 : undef;
1466 }
1467
1468 sub ruleset_addrule {
1469    my ($ruleset, $chain, $rule) = @_;
1470
1471    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1472
1473    push @{$ruleset->{$chain}}, "-A $chain $rule";
1474 }
1475
1476 sub ruleset_insertrule {
1477    my ($ruleset, $chain, $rule) = @_;
1478
1479    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1480
1481    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1482 }
1483
1484 sub get_log_rule_base {
1485     my ($chain, $vmid, $msg, $loglevel) = @_;
1486
1487     die "internal error - no log level" if !defined($loglevel);
1488
1489     $vmid = 0 if !defined($vmid);
1490
1491     # Note: we use special format for prefix to pass further
1492     # info to log daemon (VMID, LOGVELEL and CHAIN)
1493
1494     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1495 }
1496
1497 sub ruleset_addlog {
1498     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1499
1500     return if !defined($loglevel);
1501
1502     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1503
1504     $logrule = "$rule $logrule" if defined($rule);
1505
1506     ruleset_addrule($ruleset, $chain, $logrule);
1507 }
1508
1509 sub ruleset_add_chain_policy {
1510     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1511
1512     if ($policy eq 'ACCEPT') {
1513
1514         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1515                               { ACCEPT =>  $accept_action});
1516
1517     } elsif ($policy eq 'DROP') {
1518
1519         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1520
1521         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1522
1523         ruleset_addrule($ruleset, $chain, "-j DROP");
1524     } elsif ($policy eq 'REJECT') {
1525         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1526
1527         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1528
1529         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1530     } else {
1531         # should not happen
1532         die "internal error: unknown policy '$policy'";
1533     }
1534 }
1535
1536 sub ruleset_chain_add_conn_filters {
1537     my ($ruleset, $chain, $accept) = @_;
1538
1539     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1540     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1541 }
1542
1543 sub ruleset_chain_add_input_filters {
1544     my ($ruleset, $chain, $options, $cluster_conf, $loglevel) = @_;
1545
1546     if ($cluster_conf->{ipset}->{blacklist}){
1547         ruleset_addlog($ruleset, $chain, 0, "DROP: ", $loglevel, "-m set --match-set PVEFW-blacklist src");
1548         ruleset_addrule($ruleset, $chain, "-m set --match-set PVEFW-blacklist src -j DROP");
1549     }
1550
1551     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1552         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1553     }
1554
1555     if ($options->{tcpflags}) {
1556         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1557     }
1558 }
1559
1560 sub ruleset_create_vm_chain {
1561     my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
1562
1563     ruleset_create_chain($ruleset, $chain);
1564     my $accept = generate_nfqueue($options);
1565
1566     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1567         if ($direction eq 'OUT') {
1568             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1569                                                       proto => 'udp', sport => 68, dport => 67 });
1570         } else {
1571             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1572                                                       proto => 'udp', sport => 67, dport => 68 });
1573         }
1574     }
1575
1576     if ($direction eq 'OUT') {
1577         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1578             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1579         }
1580         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1581     }
1582 }
1583
1584 sub ruleset_add_group_rule {
1585     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action) = @_;
1586
1587     my $group = $rule->{action};
1588     my $group_chain = "GROUP-$group-$direction";
1589     if(!ruleset_chain_exist($ruleset, $group_chain)){
1590         generate_group_rules($ruleset, $cluster_conf, $group);
1591     }
1592
1593     if ($direction eq 'OUT' && $rule->{iface_out}) {
1594         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1595     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1596         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1597     } else {
1598         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1599     }
1600
1601     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1602 }
1603
1604 sub ruleset_generate_vm_rules {
1605     my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
1606
1607     my $lc_direction = lc($direction);
1608
1609     my $in_accept = generate_nfqueue($options);
1610
1611     foreach my $rule (@$rules) {
1612         next if $rule->{iface} && $rule->{iface} ne $netid;
1613         next if !$rule->{enable} || $rule->{errors};
1614         if ($rule->{type} eq 'group') {
1615             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1616                                    $direction eq 'OUT' ? 'RETURN' : $in_accept);
1617         } else {
1618             next if $rule->{type} ne $lc_direction;
1619             eval {
1620                 if ($direction eq 'OUT') {
1621                     ruleset_generate_rule($ruleset, $chain, $rule,
1622                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1623                                           undef, $cluster_conf);
1624                 } else {
1625                     ruleset_generate_rule($ruleset, $chain, $rule,
1626                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1627                                           undef, $cluster_conf);
1628                 }
1629             };
1630             warn $@ if $@;
1631         }
1632     }
1633 }
1634
1635 sub generate_nfqueue {
1636     my ($options) = @_;
1637
1638     if ($options->{ips}) {
1639         my $action = "NFQUEUE";
1640         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1641             if (defined($3) && defined($1)) {
1642                 $action .= " --queue-balance $1:$3";
1643             } elsif (defined($1)) {
1644                 $action .= " --queue-num $1";
1645             }
1646         }
1647         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1648         return $action;
1649     } else {
1650         return "ACCEPT";
1651     }
1652 }
1653
1654 sub ruleset_generate_vm_ipsrules {
1655     my ($ruleset, $options, $direction, $iface) = @_;
1656
1657     if ($options->{ips} && $direction eq 'IN') {
1658         my $nfqueue = generate_nfqueue($options);
1659
1660         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1661             ruleset_create_chain($ruleset, "PVEFW-IPS");
1662         }
1663
1664         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1665     }
1666 }
1667
1668 sub generate_venet_rules_direction {
1669     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1670
1671     my $lc_direction = lc($direction);
1672
1673     my $rules = $vmfw_conf->{rules};
1674
1675     my $options = $vmfw_conf->{options};
1676     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1677
1678     my $chain = "venet0-$vmid-$direction";
1679
1680     ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1681
1682     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
1683
1684     # implement policy
1685     my $policy;
1686
1687     if ($direction eq 'OUT') {
1688         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1689     } else {
1690         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1691     }
1692
1693     my $accept = generate_nfqueue($options);
1694     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1695     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1696
1697     if ($direction eq 'OUT') {
1698         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", {
1699             action => $chain,
1700             source => $ip,
1701             iface_in => 'venet0'});
1702     } else {
1703         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", {
1704             action => $chain,
1705             dest => $ip,
1706             iface_out => 'venet0'});
1707     }
1708 }
1709
1710 sub generate_tap_rules_direction {
1711     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction) = @_;
1712
1713     my $lc_direction = lc($direction);
1714
1715     my $rules = $vmfw_conf->{rules};
1716
1717     my $options = $vmfw_conf->{options};
1718     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1719
1720     my $tapchain = "$iface-$direction";
1721
1722     ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1723
1724     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
1725
1726     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
1727
1728     # implement policy
1729     my $policy;
1730
1731     if ($direction eq 'OUT') {
1732         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1733     } else {
1734         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1735     }
1736
1737     my $accept = generate_nfqueue($options);
1738     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1739     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1740
1741     # plug the tap chain to bridge chain
1742     if ($direction eq 'IN') {
1743         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
1744                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1745     } else {
1746         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
1747                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
1748     }
1749 }
1750
1751 sub enable_host_firewall {
1752     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1753
1754     my $options = $hostfw_conf->{options};
1755     my $cluster_options = $cluster_conf->{options};
1756     my $rules = $hostfw_conf->{rules};
1757     my $cluster_rules = $cluster_conf->{rules};
1758
1759     # host inbound firewall
1760     my $chain = "PVEFW-HOST-IN";
1761     ruleset_create_chain($ruleset, $chain);
1762
1763     my $loglevel = get_option_log_level($options, "log_level_in");
1764
1765     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1766
1767     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1768     ruleset_chain_add_input_filters($ruleset, $chain, $options, $cluster_conf, $loglevel);
1769
1770     # we use RETURN because we need to check also tap rules
1771     my $accept_action = 'RETURN';
1772
1773     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1774
1775     # add host rules first, so that cluster wide rules can be overwritten
1776     foreach my $rule (@$rules, @$cluster_rules) {
1777         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
1778         eval {
1779             if ($rule->{type} eq 'group') {
1780                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action);
1781             } elsif ($rule->{type} eq 'in') {
1782                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1783                                       undef, $cluster_conf);
1784             }
1785         };
1786         warn $@ if $@;
1787         delete $rule->{iface_in};
1788     }
1789
1790     # allow standard traffic for management ipset (includes cluster network)
1791     my $mngmntsrc = "-m set --match-set PVEFW-management src";
1792     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
1793     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1794     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1795     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
1796
1797     my $localnet = local_network();
1798
1799     # corosync
1800     if ($localnet) {
1801         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1802         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
1803         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
1804     }
1805
1806     # implement input policy
1807     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1808     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1809
1810     # host outbound firewall
1811     $chain = "PVEFW-HOST-OUT";
1812     ruleset_create_chain($ruleset, $chain);
1813
1814     $loglevel = get_option_log_level($options, "log_level_out");
1815
1816     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1817
1818     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1819
1820     # we use RETURN because we may want to check other thigs later
1821     $accept_action = 'RETURN';
1822
1823     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1824
1825     # add host rules first, so that cluster wide rules can be overwritten
1826     foreach my $rule (@$rules, @$cluster_rules) {
1827         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1828         eval {
1829             if ($rule->{type} eq 'group') {
1830                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action);
1831             } elsif ($rule->{type} eq 'out') {
1832                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1833                                       undef, $cluster_conf);
1834             }
1835         };
1836         warn $@ if $@;
1837         delete $rule->{iface_out};
1838     }
1839
1840     # allow standard traffic on cluster network
1841     if ($localnet) {
1842         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
1843         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
1844         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1845         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1846
1847         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1848         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
1849         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
1850     }
1851
1852     # implement output policy
1853     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
1854     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1855
1856     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1857     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1858 }
1859
1860 sub generate_group_rules {
1861     my ($ruleset, $cluster_conf, $group) = @_;
1862
1863     my $rules = $cluster_conf->{groups}->{$group};
1864
1865     if (!$rules) {
1866         warn "no such security group '$group'\n";
1867         $rules = []; # create empty chain
1868     }
1869
1870     my $chain = "GROUP-${group}-IN";
1871
1872     ruleset_create_chain($ruleset, $chain);
1873     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1874
1875     foreach my $rule (@$rules) {
1876         next if $rule->{type} ne 'in';
1877         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1878     }
1879
1880     $chain = "GROUP-${group}-OUT";
1881
1882     ruleset_create_chain($ruleset, $chain);
1883     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1884
1885     foreach my $rule (@$rules) {
1886         next if $rule->{type} ne 'out';
1887         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1888         # check also other tap rules later
1889         ruleset_generate_rule($ruleset, $chain, $rule,
1890                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1891     }
1892 }
1893
1894 my $MAX_NETS = 32;
1895 my $valid_netdev_names = {};
1896 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1897     $valid_netdev_names->{"net$i"} = 1;
1898 }
1899
1900 sub parse_fw_rule {
1901     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
1902
1903     chomp $line;
1904
1905     my $orig_line = $line;
1906
1907     my $rule = {};
1908
1909     # we can add single line comments to the end of the rule
1910     if ($line =~ s/#\s*(.*?)\s*$//) {
1911         $rule->{comment} = decode('utf8', $1);
1912     }
1913
1914     # we can disable a rule when prefixed with '|'
1915
1916     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
1917
1918     $line =~ s/^(\S+)\s+(\S+)\s*// ||
1919         die "unable to parse rule: $line\n";
1920
1921     $rule->{type} = lc($1);
1922     $rule->{action} = $2;
1923
1924     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
1925         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1926             $rule->{macro} = $1;
1927             $rule->{action} = $2;
1928         }
1929     }
1930
1931     while (length($line)) {
1932         if ($line =~ s/^-i (\S+)\s*//) {
1933             $rule->{iface} = $1;
1934             next;
1935         }
1936
1937         last if $rule->{type} eq 'group';
1938
1939         if ($line =~ s/^-p (\S+)\s*//) {
1940             $rule->{proto} = $1;
1941             next;
1942         }
1943
1944         if ($line =~ s/^-dport (\S+)\s*//) {
1945             $rule->{dport} = $1;
1946             next;
1947         }
1948
1949         if ($line =~ s/^-sport (\S+)\s*//) {
1950             $rule->{sport} = $1;
1951             next;
1952         }
1953         if ($line =~ s/^-source (\S+)\s*//) {
1954             $rule->{source} = $1;
1955             next;
1956         }
1957         if ($line =~ s/^-dest (\S+)\s*//) {
1958             $rule->{dest} = $1;
1959             next;
1960         }
1961
1962         last;
1963     }
1964
1965     die "unable to parse rule parameters: $line\n" if length($line);
1966
1967     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
1968     if ($verbose && $rule->{errors}) {
1969         warn "$prefix - errors in rule parameters: $orig_line\n";
1970         foreach my $p (keys %{$rule->{errors}}) {
1971             warn "  $p: $rule->{errors}->{$p}\n";
1972         }
1973     }
1974
1975     return $rule;
1976 }
1977
1978 sub parse_vmfw_option {
1979     my ($line) = @_;
1980
1981     my ($opt, $value);
1982
1983     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1984
1985     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
1986         $opt = lc($1);
1987         $value = int($2);
1988     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1989         $opt = lc($1);
1990         $value = $2 ? lc($3) : '';
1991     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1992         $opt = lc($1);
1993         $value = uc($3);
1994     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1995         $opt = lc($1);
1996         $value = $2;
1997     } else {
1998         chomp $line;
1999         die "can't parse option '$line'\n"
2000     }
2001
2002     return ($opt, $value);
2003 }
2004
2005 sub parse_hostfw_option {
2006     my ($line) = @_;
2007
2008     my ($opt, $value);
2009
2010     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2011
2012     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
2013         $opt = lc($1);
2014         $value = int($2);
2015     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2016         $opt = lc($1);
2017         $value = $2 ? lc($3) : '';
2018     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2019         $opt = lc($1);
2020         $value = int($2);
2021     } else {
2022         chomp $line;
2023         die "can't parse option '$line'\n"
2024     }
2025
2026     return ($opt, $value);
2027 }
2028
2029 sub parse_clusterfw_option {
2030     my ($line) = @_;
2031
2032     my ($opt, $value);
2033
2034     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
2035         $opt = lc($1);
2036         $value = int($2);
2037     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2038         $opt = lc($1);
2039         $value = uc($3);
2040     } else {
2041         chomp $line;
2042         die "can't parse option '$line'\n"
2043     }
2044
2045     return ($opt, $value);
2046 }
2047
2048 sub parse_alias {
2049     my ($line) = @_;
2050
2051     # we can add single line comments to the end of the line
2052     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2053
2054     if ($line =~ m/^(\S+)\s(\S+)$/) {
2055         my ($name, $cidr) = ($1, $2);
2056         $cidr =~ s|/32$||;
2057         pve_verify_ipv4_or_cidr($cidr);
2058         my $data = {
2059             name => $name,
2060             cidr => $cidr,
2061         };
2062         $data->{comment} = $comment  if $comment;
2063         return $data;
2064     }
2065
2066     return undef;
2067 }
2068
2069 sub parse_vm_fw_rules {
2070     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2071
2072     my $res = {
2073         rules => [],
2074         options => {},
2075         aliases => {},
2076     };
2077
2078     my $section;
2079
2080     while (defined(my $line = <$fh>)) {
2081         next if $line =~ m/^#/;
2082         next if $line =~ m/^\s*$/;
2083
2084         my $linenr = $fh->input_line_number();
2085         my $prefix = "$filename (line $linenr)";
2086
2087         if ($line =~ m/^\[(\S+)\]\s*$/i) {
2088             $section = lc($1);
2089             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
2090             next;
2091         }
2092         if (!$section) {
2093             warn "$prefix: skip line - no section";
2094             next;
2095         }
2096
2097         next if !$res->{$section}; # skip undefined section
2098
2099         if ($section eq 'options') {
2100             eval {
2101                 my ($opt, $value) = parse_vmfw_option($line);
2102                 $res->{options}->{$opt} = $value;
2103             };
2104             warn "$prefix: $@" if $@;
2105             next;
2106         }
2107
2108         if ($section eq 'aliases') {
2109             eval {
2110                 my $data = parse_alias($line);
2111                 $res->{aliases}->{lc($data->{name})} = $data;
2112             };
2113             warn "$prefix: $@" if $@;
2114             next;
2115         }
2116
2117         my $rule;
2118         eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2119         if (my $err = $@) {
2120             warn "$prefix: $err";
2121             next;
2122         }
2123
2124         push @{$res->{$section}}, $rule;
2125     }
2126
2127     return $res;
2128 }
2129
2130 sub parse_host_fw_rules {
2131     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2132
2133     my $res = { rules => [], options => {}};
2134
2135     my $section;
2136
2137     while (defined(my $line = <$fh>)) {
2138         next if $line =~ m/^#/;
2139         next if $line =~ m/^\s*$/;
2140
2141         my $linenr = $fh->input_line_number();
2142         my $prefix = "$filename (line $linenr)";
2143
2144         if ($line =~ m/^\[(\S+)\]\s*$/i) {
2145             $section = lc($1);
2146             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
2147             next;
2148         }
2149         if (!$section) {
2150             warn "$prefix: skip line - no section";
2151             next;
2152         }
2153
2154         next if !$res->{$section}; # skip undefined section
2155
2156         if ($section eq 'options') {
2157             eval {
2158                 my ($opt, $value) = parse_hostfw_option($line);
2159                 $res->{options}->{$opt} = $value;
2160             };
2161             warn "$prefix: $@" if $@;
2162             next;
2163         }
2164
2165         my $rule;
2166         eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, 'host', $verbose); };
2167         if (my $err = $@) {
2168             warn "$prefix: $err";
2169             next;
2170         }
2171
2172         push @{$res->{$section}}, $rule;
2173     }
2174
2175     return $res;
2176 }
2177
2178 sub parse_cluster_fw_rules {
2179     my ($filename, $fh, $verbose) = @_;
2180
2181     my $section;
2182     my $group;
2183
2184     my $res = {
2185         rules => [],
2186         options => {},
2187         aliases => {},
2188         groups => {},
2189         group_comments => {},
2190         ipset => {} ,
2191         ipset_comments => {},
2192     };
2193
2194     while (defined(my $line = <$fh>)) {
2195         next if $line =~ m/^#/;
2196         next if $line =~ m/^\s*$/;
2197
2198         my $linenr = $fh->input_line_number();
2199         my $prefix = "$filename (line $linenr)";
2200
2201         if ($line =~ m/^\[options\]$/i) {
2202             $section = 'options';
2203             next;
2204         }
2205
2206         if ($line =~ m/^\[aliases\]$/i) {
2207             $section = 'aliases';
2208             next;
2209         }
2210
2211         if ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2212             $section = 'groups';
2213             $group = lc($1);
2214             my $comment = $2;
2215             $res->{$section}->{$group} = [];
2216             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2217                 if $comment;
2218             next;
2219         }
2220
2221         if ($line =~ m/^\[rules\]$/i) {
2222             $section = 'rules';
2223             next;
2224         }
2225
2226         if ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2227             $section = 'ipset';
2228             $group = lc($1);
2229             my $comment = $2;
2230             $res->{$section}->{$group} = [];
2231             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2232                 if $comment;
2233             next;
2234         }
2235
2236         if (!$section) {
2237             warn "$prefix: skip line - no section\n";
2238             next;
2239         }
2240
2241         if ($section eq 'options') {
2242             eval {
2243                 my ($opt, $value) = parse_clusterfw_option($line);
2244                 $res->{options}->{$opt} = $value;
2245             };
2246             warn "$prefix: $@" if $@;
2247         } elsif ($section eq 'aliases') {
2248             eval {
2249                 my $data = parse_alias($line);
2250                 $res->{aliases}->{lc($data->{name})} = $data;
2251             };
2252             warn "$prefix: $@" if $@;
2253         } elsif ($section eq 'rules') {
2254             my $rule;
2255             eval { $rule = parse_fw_rule($prefix, $line, $res, undef, 'cluster', $verbose); };
2256             if (my $err = $@) {
2257                 warn "$prefix: $err";
2258                 next;
2259             }
2260             push @{$res->{$section}}, $rule;
2261         } elsif ($section eq 'groups') {
2262             my $rule;
2263             eval { $rule = parse_fw_rule($prefix, $line, $res, undef, 'group', $verbose); };
2264             if (my $err = $@) {
2265                 warn "$prefix: $err";
2266                 next;
2267             }
2268             push @{$res->{$section}->{$group}}, $rule;
2269         } elsif ($section eq 'ipset') {
2270             # we can add single line comments to the end of the rule
2271             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2272
2273             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2274             my $nomatch = $1;
2275             my $cidr = $2;
2276
2277             if($cidr !~ m/^${ip_alias_pattern}$/) {
2278                 $cidr =~ s|/32$||;
2279
2280                 eval { pve_verify_ipv4_or_cidr($cidr); };
2281                 if (my $err = $@) {
2282                     warn "$prefix: $cidr - $err";
2283                     next;
2284                 }
2285             }
2286
2287             my $entry = { cidr => $cidr };
2288             $entry->{nomatch} = 1 if $nomatch;
2289             $entry->{comment} = $comment if $comment;
2290
2291             push @{$res->{$section}->{$group}}, $entry;
2292         }
2293     }
2294
2295     return $res;
2296 }
2297
2298 sub run_locked {
2299     my ($code, @param) = @_;
2300
2301     my $timeout = 10;
2302
2303     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2304
2305     die $@ if $@;
2306
2307     return $res;
2308 }
2309
2310 sub read_local_vm_config {
2311
2312     my $openvz = {};
2313     my $qemu = {};
2314
2315     my $vmdata = { openvz => $openvz, qemu => $qemu };
2316
2317     my $vmlist = PVE::Cluster::get_vmlist();
2318     return $vmdata if !$vmlist || !$vmlist->{ids};
2319     my $ids = $vmlist->{ids};
2320
2321     foreach my $vmid (keys %$ids) {
2322         next if !$vmid; # skip VE0
2323         my $d = $ids->{$vmid};
2324         next if !$d->{node} || $d->{node} ne $nodename;
2325         next if !$d->{type};
2326         if ($d->{type} eq 'openvz') {
2327             if ($have_pve_manager) {
2328                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2329                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2330                     $openvz->{$vmid} = $conf;
2331                 }
2332             }
2333         } elsif ($d->{type} eq 'qemu') {
2334             if ($have_qemu_server) {
2335                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2336                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2337                     $qemu->{$vmid} = $conf;
2338                 }
2339             }
2340         }
2341     }
2342
2343     return $vmdata;
2344 };
2345
2346 sub load_vmfw_conf {
2347     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2348
2349     my $vmfw_conf = {};
2350
2351     $dir = "/etc/pve/firewall" if !defined($dir);
2352
2353     my $filename = "$dir/$vmid.fw";
2354     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2355         $vmfw_conf = parse_vm_fw_rules($filename, $fh, $cluster_conf, $rule_env, $verbose);
2356     }
2357
2358     return $vmfw_conf;
2359 }
2360
2361 my $format_rules = sub {
2362     my ($rules, $allow_iface) = @_;
2363
2364     my $raw = '';
2365
2366     foreach my $rule (@$rules) {
2367         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2368             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2369             $raw .= uc($rule->{type});
2370             if ($rule->{macro}) {
2371                 $raw .= " $rule->{macro}($rule->{action})";
2372             } else {
2373                 $raw .= " " . $rule->{action};
2374             }
2375             if ($allow_iface && $rule->{iface}) {
2376                 $raw .= " -i $rule->{iface}";
2377             }
2378
2379             if ($rule->{type} ne  'group')  {
2380                 $raw .= " -source $rule->{source}" if $rule->{source};
2381                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2382                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2383                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2384                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2385             }
2386
2387             $raw .= " # " . encode('utf8', $rule->{comment})
2388                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2389             $raw .= "\n";
2390         } else {
2391             die "unknown rule type '$rule->{type}'";
2392         }
2393     }
2394
2395     return $raw;
2396 };
2397
2398 my $format_options = sub {
2399     my ($options) = @_;
2400
2401     my $raw = '';
2402
2403     $raw .= "[OPTIONS]\n\n";
2404     foreach my $opt (keys %$options) {
2405         $raw .= "$opt: $options->{$opt}\n";
2406     }
2407     $raw .= "\n";
2408
2409     return $raw;
2410 };
2411
2412 my $format_aliases = sub {
2413     my ($aliases) = @_;
2414
2415     my $raw = '';
2416
2417     $raw .= "[ALIASES]\n\n";
2418     foreach my $k (keys %$aliases) {
2419         my $e = $aliases->{$k};
2420         $raw .= "$e->{name} $e->{cidr}";
2421         $raw .= " # " . encode('utf8', $e->{comment})
2422             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2423         $raw .= "\n";
2424     }
2425     $raw .= "\n";
2426
2427     return $raw;
2428 };
2429
2430 my $format_ipset = sub {
2431     my ($options) = @_;
2432
2433     my $raw = '';
2434
2435     my $nethash = {};
2436     foreach my $entry (@$options) {
2437         $nethash->{$entry->{cidr}} = $entry;
2438     }
2439
2440     foreach my $cidr (sort keys %$nethash) {
2441         my $entry = $nethash->{$cidr};
2442         my $line = $entry->{nomatch} ? '!' : '';
2443         $line .= $entry->{cidr};
2444         $line .= " # " . encode('utf8', $entry->{comment})
2445             if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2446         $raw .= "$line\n";
2447     }
2448
2449     return $raw;
2450 };
2451
2452 sub save_vmfw_conf {
2453     my ($vmid, $vmfw_conf) = @_;
2454
2455     my $raw = '';
2456
2457     my $options = $vmfw_conf->{options};
2458     $raw .= &$format_options($options) if scalar(keys %$options);
2459
2460     my $aliases = $vmfw_conf->{aliases};
2461     $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
2462
2463     my $rules = $vmfw_conf->{rules} || [];
2464     if (scalar(@$rules)) {
2465         $raw .= "[RULES]\n\n";
2466         $raw .= &$format_rules($rules, 1);
2467         $raw .= "\n";
2468     }
2469
2470     my $filename = "/etc/pve/firewall/$vmid.fw";
2471     PVE::Tools::file_set_contents($filename, $raw);
2472 }
2473
2474 sub read_vm_firewall_configs {
2475     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2476
2477     my $vmfw_configs = {};
2478
2479     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2480         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2481         next if !$vmfw_conf->{options}; # skip if file does not exists
2482         $vmfw_configs->{$vmid} = $vmfw_conf;
2483     }
2484     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2485         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2486         next if !$vmfw_conf->{options}; # skip if file does not exists
2487         $vmfw_configs->{$vmid} = $vmfw_conf;
2488     }
2489
2490     return $vmfw_configs;
2491 }
2492
2493 sub get_option_log_level {
2494     my ($options, $k) = @_;
2495
2496     my $v = $options->{$k};
2497     $v = $default_log_level if !defined($v);
2498
2499     return undef if $v eq '' || $v eq 'nolog';
2500
2501     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2502
2503     return $v if ($v >= 0) && ($v <= 7);
2504
2505     warn "unknown log level ($k = '$v')\n";
2506
2507     return undef;
2508 }
2509
2510 sub generate_std_chains {
2511     my ($ruleset, $options) = @_;
2512
2513     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2514
2515     # same as shorewall smurflog.
2516     my $chain = 'PVEFW-smurflog';
2517     $pve_std_chains->{$chain} = [];
2518
2519     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2520     push @{$pve_std_chains->{$chain}}, "-j DROP";
2521
2522     # same as shorewall logflags action.
2523     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2524     $chain = 'PVEFW-logflags';
2525     $pve_std_chains->{$chain} = [];
2526
2527     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2528     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2529     push @{$pve_std_chains->{$chain}}, "-j DROP";
2530
2531     foreach my $chain (keys %$pve_std_chains) {
2532         ruleset_create_chain($ruleset, $chain);
2533         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2534             if (ref($rule)) {
2535                 ruleset_generate_rule($ruleset, $chain, $rule);
2536             } else {
2537                 ruleset_addrule($ruleset, $chain, $rule);
2538             }
2539         }
2540     }
2541 }
2542
2543 sub generate_ipset_chains {
2544     my ($ipset_ruleset, $fw_conf) = @_;
2545
2546     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2547         generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset}, $fw_conf->{aliases});
2548     }
2549 }
2550
2551 sub generate_ipset {
2552     my ($ipset_ruleset, $name, $options, $aliases) = @_;
2553
2554     my $hashsize = scalar(@$options);
2555     if ($hashsize <= 64) {
2556         $hashsize = 64;
2557     } else {
2558         $hashsize = round_powerof2($hashsize);
2559     }
2560
2561     push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
2562
2563     # remove duplicates
2564     my $nethash = {};
2565     foreach my $entry (@$options) {
2566         my $cidr = $entry->{cidr};
2567         if ($cidr =~ m/^${ip_alias_pattern}$/) {
2568             my $alias = lc($cidr);
2569             if ($aliases->{$alias}) {
2570                 $entry->{cidr} = $aliases->{$alias}->{cidr};
2571                 $nethash->{$entry->{cidr}} = $entry;
2572             } else {
2573                 warn "no such alias '$cidr'\n" if !$aliases->{$alias};
2574             }
2575         } else {
2576             $nethash->{$entry->{cidr}} = $entry;
2577         }
2578     }
2579
2580     foreach my $cidr (sort keys %$nethash) {
2581         my $entry = $nethash->{$cidr};
2582
2583         my $cmd = "add $name $cidr";
2584         if ($entry->{nomatch}) {
2585             if ($feature_ipset_nomatch) {
2586                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2587             } else {
2588                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2589             }
2590         } else {
2591             push @{$ipset_ruleset->{$name}}, $cmd;
2592         }
2593     }
2594 }
2595
2596 sub round_powerof2 {
2597     my ($int) = @_;
2598
2599     $int--;
2600     $int |= $int >> $_ foreach (1,2,4,8,16);
2601     return ++$int;
2602 }
2603
2604 sub load_clusterfw_conf {
2605     my ($filename, $verbose) = @_;
2606
2607     $filename = $clusterfw_conf_filename if !defined($filename);
2608
2609     my $cluster_conf = {};
2610     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2611         $cluster_conf = parse_cluster_fw_rules($filename, $fh, $verbose);
2612     }
2613
2614     return $cluster_conf;
2615 }
2616
2617 sub save_clusterfw_conf {
2618     my ($cluster_conf) = @_;
2619
2620     my $raw = '';
2621
2622     my $options = $cluster_conf->{options};
2623     $raw .= &$format_options($options) if scalar(keys %$options);
2624
2625     my $aliases = $cluster_conf->{aliases};
2626     $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
2627
2628     foreach my $ipset (sort keys %{$cluster_conf->{ipset}}) {
2629         if (my $comment = $cluster_conf->{ipset_comments}->{$ipset}) {
2630             my $utf8comment = encode('utf8', $comment);
2631             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2632         } else {
2633             $raw .= "[IPSET $ipset]\n\n";
2634         }
2635         my $options = $cluster_conf->{ipset}->{$ipset};
2636         $raw .= &$format_ipset($options);
2637         $raw .= "\n";
2638     }
2639
2640     my $rules = $cluster_conf->{rules};
2641     if (scalar(@$rules)) {
2642         $raw .= "[RULES]\n\n";
2643         $raw .= &$format_rules($rules, 1);
2644         $raw .= "\n";
2645     }
2646
2647     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2648         my $rules = $cluster_conf->{groups}->{$group};
2649         if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2650             my $utf8comment = encode('utf8', $comment);
2651             $raw .= "[group $group] # $utf8comment\n\n";
2652         } else {
2653             $raw .= "[group $group]\n\n";
2654         }
2655
2656         $raw .= &$format_rules($rules, 0);
2657         $raw .= "\n";
2658     }
2659
2660     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2661 }
2662
2663 sub load_hostfw_conf {
2664     my ($cluster_conf, $filename, $verbose) = @_;
2665
2666     $filename = $hostfw_conf_filename if !defined($filename);
2667
2668     my $hostfw_conf = {};
2669     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2670         $hostfw_conf = parse_host_fw_rules($filename, $fh, $cluster_conf, $verbose);
2671     }
2672     return $hostfw_conf;
2673 }
2674
2675 sub save_hostfw_conf {
2676     my ($hostfw_conf) = @_;
2677
2678     my $raw = '';
2679
2680     my $options = $hostfw_conf->{options};
2681     $raw .= &$format_options($options) if scalar(keys %$options);
2682
2683     my $rules = $hostfw_conf->{rules};
2684     if (scalar(@$rules)) {
2685         $raw .= "[RULES]\n\n";
2686         $raw .= &$format_rules($rules, 1);
2687         $raw .= "\n";
2688     }
2689
2690     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2691 }
2692
2693 sub compile {
2694     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
2695
2696     my $vmfw_configs;
2697
2698     if ($vmdata) { # test mode
2699         my $testdir = $vmdata->{testdir} || die "no test directory specified";
2700         my $filename = "$testdir/cluster.fw";
2701         $cluster_conf = load_clusterfw_conf($filename, $verbose);
2702
2703         $filename = "$testdir/host.fw";
2704         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
2705
2706         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
2707     } else { # normal operation
2708         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
2709
2710         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
2711
2712         $vmdata = read_local_vm_config();
2713         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
2714     }
2715
2716     $cluster_conf->{ipset}->{venet0} = [];
2717
2718     my $localnet;
2719     if ($cluster_conf->{aliases}->{local_network}) {
2720         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2721     } else {
2722         $localnet = local_network() || '127.0.0.0/8';
2723         $cluster_conf->{aliases}->{local_network} = { cidr => $localnet };
2724     }
2725
2726     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
2727
2728     my $ruleset = {};
2729
2730     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2731     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2732
2733     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2734
2735     my $hostfw_options = $hostfw_conf->{options} || {};
2736
2737     # fixme: what log level should we use here?
2738     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2739
2740     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
2741
2742     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
2743     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set PVEFW-venet0 src -j PVEFW-VENET-OUT");
2744     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set PVEFW-venet0 src -j PVEFW-VENET-OUT");
2745
2746     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
2747     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options, $cluster_conf, $loglevel);
2748
2749     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
2750
2751     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
2752     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
2753
2754     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
2755     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options, $cluster_conf, $loglevel);
2756
2757     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set PVEFW-venet0 dst -j PVEFW-VENET-IN");
2758
2759     generate_std_chains($ruleset, $hostfw_options);
2760
2761     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2762
2763     if ($hostfw_enable) {
2764         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf); };
2765         warn $@ if $@; # just to be sure - should not happen
2766     }
2767
2768     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set PVEFW-venet0 dst -j PVEFW-VENET-IN");
2769
2770     # generate firewall rules for QEMU VMs
2771     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2772         eval {
2773             my $conf = $vmdata->{qemu}->{$vmid};
2774             my $vmfw_conf = $vmfw_configs->{$vmid};
2775             return if !$vmfw_conf;
2776             return if !$vmfw_conf->{options}->{enable};
2777
2778             foreach my $netid (keys %$conf) {
2779                 next if $netid !~ m/^net(\d+)$/;
2780                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
2781                 next if !$net->{firewall};
2782                 my $iface = "tap${vmid}i$1";
2783
2784                 my $macaddr = $net->{macaddr};
2785                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2786                                              $vmfw_conf, $vmid, 'IN');
2787                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2788                                              $vmfw_conf, $vmid, 'OUT');
2789             }
2790         };
2791         warn $@ if $@; # just to be sure - should not happen
2792     }
2793
2794     # generate firewall rules for OpenVZ containers
2795     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2796         eval {
2797             my $conf = $vmdata->{openvz}->{$vmid};
2798
2799             my $vmfw_conf = $vmfw_configs->{$vmid};
2800             return if !$vmfw_conf;
2801             return if !$vmfw_conf->{options}->{enable};
2802
2803             if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2804                 my $ip = $conf->{ip_address}->{value};
2805                 $ip =~ s/\s+/,/g;
2806                 parse_address_list($ip); # make sure we have a valid $ip list
2807
2808                 my @ips = split(',', $ip);
2809
2810                 foreach my $singleip (@ips) {
2811                     my $venet0ipset = {};
2812                     $venet0ipset->{cidr} = $singleip;
2813                     push @{$cluster_conf->{ipset}->{venet0}}, $venet0ipset;
2814                 }
2815
2816                 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2817                 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2818             }
2819
2820             if ($conf->{netif} && $conf->{netif}->{value}) {
2821                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2822                 foreach my $netid (keys %$netif) {
2823                     my $d = $netif->{$netid};
2824
2825                     my $macaddr = $d->{mac};
2826                     my $iface = $d->{host_ifname};
2827                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2828                                                  $vmfw_conf, $vmid, 'IN');
2829                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2830                                                  $vmfw_conf, $vmid, 'OUT');
2831                 }
2832             }
2833         };
2834         warn $@ if $@; # just to be sure - should not happen
2835     }
2836
2837     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
2838         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
2839     }
2840
2841     my $ipset_ruleset = {};
2842     generate_ipset_chains($ipset_ruleset, $cluster_conf);
2843
2844     return ($ruleset, $ipset_ruleset);
2845 }
2846
2847 sub get_ruleset_status {
2848     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2849
2850     my $statushash = {};
2851
2852     foreach my $chain (sort keys %$ruleset) {
2853         my $sig = &$digest_fn($ruleset->{$chain});
2854
2855         $statushash->{$chain}->{sig} = $sig;
2856
2857         my $oldsig = $active_chains->{$chain};
2858         if (!defined($oldsig)) {
2859             $statushash->{$chain}->{action} = 'create';
2860         } else {
2861             if ($oldsig eq $sig) {
2862                 $statushash->{$chain}->{action} = 'exists';
2863             } else {
2864                 $statushash->{$chain}->{action} = 'update';
2865             }
2866         }
2867         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2868         foreach my $cmd (@{$ruleset->{$chain}}) {
2869             print "\t$cmd\n" if $verbose;
2870         }
2871     }
2872
2873     foreach my $chain (sort keys %$active_chains) {
2874         if (!defined($ruleset->{$chain})) {
2875             my $sig = $active_chains->{$chain};
2876             $statushash->{$chain}->{action} = 'delete';
2877             $statushash->{$chain}->{sig} = $sig;
2878             print "delete $chain ($sig)\n" if $verbose;
2879         }
2880     }
2881
2882     return $statushash;
2883 }
2884
2885 sub print_sig_rule {
2886     my ($chain, $sig) = @_;
2887
2888     # We just use this to store a SHA1 checksum used to detect changes
2889     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2890 }
2891
2892 sub get_ruleset_cmdlist {
2893     my ($ruleset, $verbose) = @_;
2894
2895     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2896
2897     my ($active_chains, $hooks) = iptables_get_chains();
2898     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2899
2900     # create missing chains first
2901     foreach my $chain (sort keys %$ruleset) {
2902         my $stat = $statushash->{$chain};
2903         die "internal error" if !$stat;
2904         next if $stat->{action} ne 'create';
2905
2906         $cmdlist .= ":$chain - [0:0]\n";
2907     }
2908
2909     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2910         if (!$hooks->{$h}) {
2911             $cmdlist .= "-A $h -j PVEFW-$h\n";
2912         }
2913     }
2914
2915     foreach my $chain (sort keys %$ruleset) {
2916         my $stat = $statushash->{$chain};
2917         die "internal error" if !$stat;
2918
2919         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2920             $cmdlist .= "-F $chain\n";
2921             foreach my $cmd (@{$ruleset->{$chain}}) {
2922                 $cmdlist .= "$cmd\n";
2923             }
2924             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2925         } elsif ($stat->{action} eq 'delete') {
2926             die "internal error"; # this should not happen
2927         } elsif ($stat->{action} eq 'exists') {
2928             # do nothing
2929         } else {
2930             die "internal error - unknown status '$stat->{action}'";
2931         }
2932     }
2933
2934     foreach my $chain (keys %$statushash) {
2935         next if $statushash->{$chain}->{action} ne 'delete';
2936         $cmdlist .= "-F $chain\n";
2937     }
2938     foreach my $chain (keys %$statushash) {
2939         next if $statushash->{$chain}->{action} ne 'delete';
2940         next if $chain eq 'PVEFW-INPUT';
2941         next if $chain eq 'PVEFW-OUTPUT';
2942         next if $chain eq 'PVEFW-FORWARD';
2943         $cmdlist .= "-X $chain\n";
2944     }
2945
2946     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
2947
2948     $cmdlist .= "COMMIT\n";
2949
2950     return wantarray ? ($cmdlist, $changes) : $cmdlist;
2951 }
2952
2953 sub get_ipset_cmdlist {
2954     my ($ruleset, $verbose) = @_;
2955
2956     my $cmdlist = "";
2957
2958     my $delete_cmdlist = "";
2959
2960     my $active_chains = ipset_get_chains();
2961     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
2962
2963     # remove stale _swap chains
2964     foreach my $chain (keys %$active_chains) {
2965         if ($chain =~ m/^PVEFW-\S+_swap$/) {
2966             $cmdlist .= "destroy $chain\n";
2967         }
2968     }
2969
2970     foreach my $chain (sort keys %$ruleset) {
2971         my $stat = $statushash->{$chain};
2972         die "internal error" if !$stat;
2973
2974         if ($stat->{action} eq 'create') {
2975             foreach my $cmd (@{$ruleset->{$chain}}) {
2976                 $cmdlist .= "$cmd\n";
2977             }
2978         }
2979
2980         if ($stat->{action} eq 'update') {
2981             my $chain_swap = $chain."_swap";
2982
2983             foreach my $cmd (@{$ruleset->{$chain}}) {
2984                 $cmd =~ s/$chain/$chain_swap/;
2985                 $cmdlist .= "$cmd\n";
2986             }
2987             $cmdlist .= "swap $chain_swap $chain\n";
2988             $cmdlist .= "flush $chain_swap\n";
2989             $cmdlist .= "destroy $chain_swap\n";
2990         }
2991
2992     }
2993
2994     foreach my $chain (keys %$statushash) {
2995         next if $statushash->{$chain}->{action} ne 'delete';
2996
2997         $delete_cmdlist .= "flush $chain\n";
2998         $delete_cmdlist .= "destroy $chain\n";
2999     }
3000
3001     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3002
3003     return ($cmdlist, $delete_cmdlist, $changes);
3004 }
3005
3006 sub apply_ruleset {
3007     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
3008
3009     enable_bridge_firewall();
3010
3011     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3012         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3013
3014     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3015
3016     if ($verbose) {
3017         if ($ipset_changes) {
3018             print "ipset changes:\n";
3019             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3020             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3021         }
3022
3023         if ($changes) {
3024             print "iptables changes:\n";
3025             print $cmdlist;
3026         }
3027     }
3028
3029     ipset_restore_cmdlist($ipset_create_cmdlist);
3030
3031     iptables_restore_cmdlist($cmdlist);
3032
3033     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3034
3035     # test: re-read status and check if everything is up to date
3036     my $active_chains = iptables_get_chains();
3037     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3038
3039     my $errors;
3040     foreach my $chain (sort keys %$ruleset) {
3041         my $stat = $statushash->{$chain};
3042         if ($stat->{action} ne 'exists') {
3043             warn "unable to update chain '$chain'\n";
3044             $errors = 1;
3045         }
3046     }
3047
3048     die "unable to apply firewall changes\n" if $errors;
3049
3050     update_nf_conntrack_max($hostfw_conf);
3051
3052     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3053
3054 }
3055
3056 sub update_nf_conntrack_max {
3057     my ($hostfw_conf) = @_;
3058
3059     my $max = 65536; # reasonable default
3060
3061     my $options = $hostfw_conf->{options} || {};
3062
3063     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3064         $max = $options->{nf_conntrack_max};
3065         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3066     }
3067
3068     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3069     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3070
3071     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3072
3073     if ($current != $max) {
3074         my $hashsize = int($max/4);
3075         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3076         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3077     }
3078 }
3079
3080 sub update_nf_conntrack_tcp_timeout_established {
3081     my ($hostfw_conf) = @_;
3082
3083     my $options = $hostfw_conf->{options} || {};
3084
3085     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3086
3087     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3088 }
3089
3090 sub remove_pvefw_chains {
3091
3092     my ($chash, $hooks) = iptables_get_chains();
3093     my $cmdlist = "*filter\n";
3094
3095     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3096         if ($hooks->{$h}) {
3097             $cmdlist .= "-D $h -j PVEFW-$h\n";
3098         }
3099     }
3100
3101     foreach my $chain (keys %$chash) {
3102         $cmdlist .= "-F $chain\n";
3103     }
3104
3105     foreach my $chain (keys %$chash) {
3106         $cmdlist .= "-X $chain\n";
3107     }
3108     $cmdlist .= "COMMIT\n";
3109
3110     iptables_restore_cmdlist($cmdlist);
3111 }
3112
3113 sub init {
3114     my $cluster_conf = load_clusterfw_conf();
3115     my $cluster_options = $cluster_conf->{options};
3116     my $enable = $cluster_options->{enable};
3117
3118     return if !$enable;
3119
3120     # load required modules here
3121 }
3122
3123 sub update {
3124     my $code = sub {
3125
3126         my $cluster_conf = load_clusterfw_conf();
3127         my $cluster_options = $cluster_conf->{options};
3128
3129         my $enable = $cluster_options->{enable};
3130
3131         die "Firewall is disabled - cannot start\n" if !$enable;
3132
3133         if (!$enable) {
3134             PVE::Firewall::remove_pvefw_chains();
3135             return;
3136         }
3137
3138         my $hostfw_conf = load_hostfw_conf();
3139
3140         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
3141
3142         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset);
3143     };
3144
3145     run_locked($code);
3146 }
3147
3148 1;