PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5 use Data::Dumper;
   6 use Digest::SHA;
   7 use PVE::Tools;
   8 use PVE::QemuServer;
   9 use File::Basename;
  10 use File::Path;
  11 use IO::File;
  12 use Net::IP;
  13 use PVE::Tools qw(run_command lock_file);
  14
  15 use Data::Dumper;
  16
  17 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
  18 my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
  19
  20 # imported/converted from: /usr/share/shorewall/macro.*
  21 my $pve_fw_macros = {
  22     'Amanda' => [
  23         { action => 'PARAM', proto => 'udp', dport => '10080' },
  24         { action => 'PARAM', proto => 'tcp', dport => '10080' },
  25     ],
  26     'Auth' => [
  27         { action => 'PARAM', proto => 'tcp', dport => '113' },
  28     ],
  29     'BGP' => [
  30         { action => 'PARAM', proto => 'tcp', dport => '179' },
  31     ],
  32     'BitTorrent' => [
  33         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
  34         { action => 'PARAM', proto => 'udp', dport => '6881' },
  35     ],
  36     'BitTorrent32' => [
  37         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
  38         { action => 'PARAM', proto => 'udp', dport => '6881' },
  39     ],
  40     'CVS' => [
  41         { action => 'PARAM', proto => 'tcp', dport => '2401' },
  42     ],
  43     'Citrix' => [
  44         { action => 'PARAM', proto => 'tcp', dport => '1494' },
  45         { action => 'PARAM', proto => 'udp', dport => '1604' },
  46         { action => 'PARAM', proto => 'tcp', dport => '2598' },
  47     ],
  48     'DAAP' => [
  49         { action => 'PARAM', proto => 'tcp', dport => '3689' },
  50         { action => 'PARAM', proto => 'udp', dport => '3689' },
  51     ],
  52     'DCC' => [
  53         { action => 'PARAM', proto => 'tcp', dport => '6277' },
  54     ],
  55     'DHCPfwd' => [
  56         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
  57         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' },
  58     ],
  59     'DNS' => [
  60         { action => 'PARAM', proto => 'udp', dport => '53' },
  61         { action => 'PARAM', proto => 'tcp', dport => '53' },
  62     ],
  63     'Distcc' => [
  64         { action => 'PARAM', proto => 'tcp', dport => '3632' },
  65     ],
  66     'Edonkey' => [
  67         { action => 'PARAM', proto => 'tcp', dport => '4662' },
  68         { action => 'PARAM', proto => 'udp', dport => '4665' },
  69     ],
  70     'FTP' => [
  71         { action => 'PARAM', proto => 'tcp', dport => '21' },
  72     ],
  73     'Finger' => [
  74         { action => 'PARAM', proto => 'tcp', dport => '79' },
  75     ],
  76     'GNUnet' => [
  77         { action => 'PARAM', proto => 'tcp', dport => '2086' },
  78         { action => 'PARAM', proto => 'udp', dport => '2086' },
  79         { action => 'PARAM', proto => 'tcp', dport => '1080' },
  80         { action => 'PARAM', proto => 'udp', dport => '1080' },
  81     ],
  82     'GRE' => [
  83         { action => 'PARAM', proto => '47' },
  84         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
  85     ],
  86     'Git' => [
  87         { action => 'PARAM', proto => 'tcp', dport => '9418' },
  88     ],
  89     'Gnutella' => [
  90         { action => 'PARAM', proto => 'tcp', dport => '6346' },
  91         { action => 'PARAM', proto => 'udp', dport => '6346' },
  92     ],
  93     'HKP' => [
  94         { action => 'PARAM', proto => 'tcp', dport => '11371' },
  95     ],
  96     'HTTP' => [
  97         { action => 'PARAM', proto => 'tcp', dport => '80' },
  98     ],
  99     'HTTPS' => [
 100         { action => 'PARAM', proto => 'tcp', dport => '443' },
 101     ],
 102     'ICPV2' => [
 103         { action => 'PARAM', proto => 'udp', dport => '3130' },
 104     ],
 105     'ICQ' => [
 106         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 107     ],
 108     'IMAP' => [
 109         { action => 'PARAM', proto => 'tcp', dport => '143' },
 110     ],
 111     'IMAPS' => [
 112         { action => 'PARAM', proto => 'tcp', dport => '993' },
 113     ],
 114     'IPIP' => [
 115         { action => 'PARAM', proto => '94' },
 116         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' },
 117     ],
 118     'IPP' => [
 119         { action => 'PARAM', proto => 'tcp', dport => '631' },
 120     ],
 121     'IPPbrd' => [
 122         { action => 'PARAM', proto => 'udp', dport => '631' },
 123     ],
 124     'IPPserver' => [
 125         { action => 'PARAM', source => 'SOURCE', dest => 'DEST', proto => 'tcp', dport => '631' },
 126         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '631' },
 127     ],
 128     'IPsec' => [
 129         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 130         { action => 'PARAM', proto => '50' },
 131         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
 132         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
 133     ],
 134     'IPsecah' => [
 135         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 136         { action => 'PARAM', proto => '51' },
 137         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
 138         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' },
 139     ],
 140     'IPsecnat' => [
 141         { action => 'PARAM', proto => 'udp', dport => '500' },
 142         { action => 'PARAM', proto => 'udp', dport => '4500' },
 143         { action => 'PARAM', proto => '50' },
 144         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' },
 145         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' },
 146         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
 147     ],
 148     'IRC' => [
 149         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 150     ],
 151     'JabberPlain' => [
 152         { action => 'PARAM', proto => 'tcp', dport => '5222' },
 153     ],
 154     'JabberSecure' => [
 155         { action => 'PARAM', proto => 'tcp', dport => '5223' },
 156     ],
 157     'Jabberd' => [
 158         { action => 'PARAM', proto => 'tcp', dport => '5269' },
 159     ],
 160     'Jetdirect' => [
 161         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 162     ],
 163     'L2TP' => [
 164         { action => 'PARAM', proto => 'udp', dport => '1701' },
 165         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' },
 166     ],
 167     'LDAP' => [
 168         { action => 'PARAM', proto => 'tcp', dport => '389' },
 169     ],
 170     'LDAPS' => [
 171         { action => 'PARAM', proto => 'tcp', dport => '636' },
 172     ],
 173     'MSNP' => [
 174         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 175     ],
 176     'MSSQL' => [
 177         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 178     ],
 179     'Mail' => [
 180         { action => 'PARAM', proto => 'tcp', dport => '25' },
 181         { action => 'PARAM', proto => 'tcp', dport => '465' },
 182         { action => 'PARAM', proto => 'tcp', dport => '587' },
 183     ],
 184     'Munin' => [
 185         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 186     ],
 187     'MySQL' => [
 188         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 189     ],
 190     'NNTP' => [
 191         { action => 'PARAM', proto => 'tcp', dport => '119' },
 192     ],
 193     'NNTPS' => [
 194         { action => 'PARAM', proto => 'tcp', dport => '563' },
 195     ],
 196     'NTP' => [
 197         { action => 'PARAM', proto => 'udp', dport => '123' },
 198     ],
 199     'NTPbi' => [
 200         { action => 'PARAM', proto => 'udp', dport => '123' },
 201         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' },
 202     ],
 203     'NTPbrd' => [
 204         { action => 'PARAM', proto => 'udp', dport => '123' },
 205         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '123' },
 206     ],
 207     'OSPF' => [
 208         { action => 'PARAM', proto => '89' },
 209     ],
 210     'OpenVPN' => [
 211         { action => 'PARAM', proto => 'udp', dport => '1194' },
 212     ],
 213     'PCA' => [
 214         { action => 'PARAM', proto => 'udp', dport => '5632' },
 215         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 216     ],
 217     'POP3' => [
 218         { action => 'PARAM', proto => 'tcp', dport => '110' },
 219     ],
 220     'POP3S' => [
 221         { action => 'PARAM', proto => 'tcp', dport => '995' },
 222     ],
 223     'PPtP' => [
 224         { action => 'PARAM', proto => '47' },
 225         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
 226         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 227     ],
 228     'Ping' => [
 229         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 230     ],
 231     'PostgreSQL' => [
 232         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 233     ],
 234     'Printer' => [
 235         { action => 'PARAM', proto => 'tcp', dport => '515' },
 236     ],
 237     'RDP' => [
 238         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 239     ],
 240     'RIPbi' => [
 241         { action => 'PARAM', proto => 'udp', dport => '520' },
 242         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' },
 243     ],
 244     'RNDC' => [
 245         { action => 'PARAM', proto => 'tcp', dport => '953' },
 246     ],
 247     'Razor' => [
 248         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 249     ],
 250     'Rdate' => [
 251         { action => 'PARAM', proto => 'tcp', dport => '37' },
 252     ],
 253     'Rsync' => [
 254         { action => 'PARAM', proto => 'tcp', dport => '873' },
 255     ],
 256     'SANE' => [
 257         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 258     ],
 259     'SMB' => [
 260         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 261         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 262         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 263         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 264     ],
 265     'SMBBI' => [
 266         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 267         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 268         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 269         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 270         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' },
 271         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' },
 272         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' },
 273         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' },
 274     ],
 275     'SMBswat' => [
 276         { action => 'PARAM', proto => 'tcp', dport => '901' },
 277     ],
 278     'SMTP' => [
 279         { action => 'PARAM', proto => 'tcp', dport => '25' },
 280     ],
 281     'SMTPS' => [
 282         { action => 'PARAM', proto => 'tcp', dport => '465' },
 283     ],
 284     'SNMP' => [
 285         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 286         { action => 'PARAM', proto => 'tcp', dport => '161' },
 287     ],
 288     'SPAMD' => [
 289         { action => 'PARAM', proto => 'tcp', dport => '783' },
 290     ],
 291     'SSH' => [
 292         { action => 'PARAM', proto => 'tcp', dport => '22' },
 293     ],
 294     'SVN' => [
 295         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 296     ],
 297     'SixXS' => [
 298         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 299         { action => 'PARAM', proto => 'udp', dport => '3740' },
 300         { action => 'PARAM', proto => '41' },
 301         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 302     ],
 303     'Squid' => [
 304         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 305     ],
 306     'Submission' => [
 307         { action => 'PARAM', proto => 'tcp', dport => '587' },
 308     ],
 309     'Syslog' => [
 310         { action => 'PARAM', proto => 'udp', dport => '514' },
 311         { action => 'PARAM', proto => 'tcp', dport => '514' },
 312     ],
 313     'TFTP' => [
 314         { action => 'PARAM', proto => 'udp', dport => '69' },
 315     ],
 316     'Telnet' => [
 317         { action => 'PARAM', proto => 'tcp', dport => '23' },
 318     ],
 319     'Telnets' => [
 320         { action => 'PARAM', proto => 'tcp', dport => '992' },
 321     ],
 322     'Time' => [
 323         { action => 'PARAM', proto => 'tcp', dport => '37' },
 324     ],
 325     'Trcrt' => [
 326         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 327         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 328     ],
 329     'VNC' => [
 330         { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
 331     ],
 332     'VNCL' => [
 333         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 334     ],
 335     'Web' => [
 336         { action => 'PARAM', proto => 'tcp', dport => '80' },
 337         { action => 'PARAM', proto => 'tcp', dport => '443' },
 338     ],
 339     'Webcache' => [
 340         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 341     ],
 342     'Webmin' => [
 343         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 344     ],
 345     'Whois' => [
 346         { action => 'PARAM', proto => 'tcp', dport => '43' },
 347     ],
 348 };
 349
 350 my $pve_fw_parsed_macros;
 351 my $pve_fw_preferred_macro_names = {};
 352
 353 my $pve_std_chains = {
 354     'PVEFW-SET-ACCEPT-MARK' => [
 355         "-j MARK --set-mark 1",
 356     ],
 357     'PVEFW-DropBroadcast' => [
 358         # same as shorewall 'Broadcast'
 359         # simply DROP BROADCAST/MULTICAST/ANYCAST
 360         # we can use this to reduce logging
 361         { action => 'DROP', dsttype => 'BROADCAST' },
 362         { action => 'DROP', dsttype => 'MULTICAST' },
 363         { action => 'DROP', dsttype => 'ANYCAST' },
 364         { action => 'DROP', dest => '224.0.0.0/4' },
 365     ],
 366     'PVEFW-reject' => [
 367         # same as shorewall 'reject'
 368         { action => 'DROP', dsttype => 'BROADCAST' },
 369         { action => 'DROP', source => '224.0.0.0/4' },
 370         { action => 'DROP', proto => 'icmp' },
 371         "-p tcp -j REJECT --reject-with tcp-reset",
 372         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 373         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 374         "-j REJECT --reject-with icmp-host-prohibited",
 375     ],
 376     'PVEFW-Drop' => [
 377         # same as shorewall 'Drop', which is equal to DROP,
 378         # but REJECT/DROP some packages to reduce logging,
 379         # and ACCEPT critical ICMP types
 380         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 381         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 382         { action => 'PVEFW-DropBroadcast' },
 383         # ACCEPT critical ICMP types
 384         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 385         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 386         # Drop packets with INVALID state
 387         "-m conntrack --ctstate INVALID -j DROP",
 388         # Drop Microsoft SMB noise
 389         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 390         { action => 'DROP', proto => 'udp', dport => '137:139'},
 391         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 392         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 393         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 394         # Drop new/NotSyn traffic so that it doesn't get logged
 395         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 396         # Drop DNS replies
 397         { action => 'DROP', proto => 'udp', sport => 53 },
 398     ],
 399     'PVEFW-Reject' => [
 400         # same as shorewall 'Reject', which is equal to Reject,
 401         # but REJECT/DROP some packages to reduce logging,
 402         # and ACCEPT critical ICMP types
 403         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 404         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 405         { action => 'PVEFW-DropBroadcast' },
 406         # ACCEPT critical ICMP types
 407         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 408         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 409         # Drop packets with INVALID state
 410         "-m conntrack --ctstate INVALID -j DROP",
 411         # Drop Microsoft SMB noise
 412         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 413         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 414         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 415         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 416         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 417         # Drop new/NotSyn traffic so that it doesn't get logged
 418         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 419         # Drop DNS replies
 420         { action => 'DROP', proto => 'udp', sport => 53 },
 421     ],
 422     'PVEFW-logflags' => [
 423         # same as shorewall logflags action. (fixme: enable/disable logging)
 424         "-j LOG --log-prefix \"logflags-dropped:\" --log-level 4 --log-ip-options",
 425         "-j DROP",
 426     ],
 427     'PVEFW-tcpflags' => [
 428         # same as shorewall tcpflags action.
 429         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 430         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 431         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 432         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 433         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 434         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 435     ],
 436     'PVEFW-smurflog' => [
 437         # same as shorewall smurflog. (fixme: enable/disable logging)
 438         "-j LOG --log-prefix \"smurfs-dropped\" --log-level 4",
 439         "-j DROP",
 440     ],
 441     'PVEFW-smurfs' => [
 442         # same as shorewall smurfs action
 443         # Filter packets for smurfs (packets with a broadcast address as the source).
 444         "-s 0.0.0.0/32 -j RETURN",
 445         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 446         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 447     ],
 448 };
 449
 450 # iptables -p icmp -h
 451 my $icmp_type_names = {
 452     any => 1,
 453     'echo-reply' => 1,
 454     'destination-unreachable' => 1,
 455     'network-unreachable' => 1,
 456     'host-unreachable' => 1,
 457     'protocol-unreachable' => 1,
 458     'port-unreachable' => 1,
 459     'fragmentation-needed' => 1,
 460     'source-route-failed' => 1,
 461     'network-unknown' => 1,
 462     'host-unknown' => 1,
 463     'network-prohibited' => 1,
 464     'host-prohibited' => 1,
 465     'TOS-network-unreachable' => 1,
 466     'TOS-host-unreachable' => 1,
 467     'communication-prohibited' => 1,
 468     'host-precedence-violation' => 1,
 469     'precedence-cutoff' => 1,
 470     'source-quench' => 1,
 471     'redirect' => 1,
 472     'network-redirect' => 1,
 473     'host-redirect' => 1,
 474     'TOS-network-redirect' => 1,
 475     'TOS-host-redirect' => 1,
 476     'echo-request' => 1,
 477     'router-advertisement' => 1,
 478     'router-solicitation' => 1,
 479     'time-exceeded' => 1,
 480     'ttl-zero-during-transit' => 1,
 481     'ttl-zero-during-reassembly' => 1,
 482     'parameter-problem' => 1,
 483     'ip-header-bad' => 1,
 484     'required-option-missing' => 1,
 485     'timestamp-request' => 1,
 486     'timestamp-reply' => 1,
 487     'address-mask-request' => 1,
 488     'address-mask-reply' => 1,
 489 };
 490
 491 sub get_firewall_macros {
 492
 493     return $pve_fw_parsed_macros if $pve_fw_parsed_macros;
 494
 495     $pve_fw_parsed_macros = {};
 496
 497     foreach my $k (keys %$pve_fw_macros) {
 498         my $name = lc($k);
 499
 500         my $macro =  $pve_fw_macros->{$k};
 501         $pve_fw_preferred_macro_names->{$name} = $k;
 502         $pve_fw_parsed_macros->{$name} = $macro;
 503     }
 504
 505     return $pve_fw_parsed_macros;
 506 }
 507
 508 my $etc_services;
 509
 510 sub get_etc_services {
 511
 512     return $etc_services if $etc_services;
 513
 514     my $filename = "/etc/services";
 515
 516     my $fh = IO::File->new($filename, O_RDONLY);
 517     if (!$fh) {
 518         warn "unable to read '$filename' - $!\n";
 519         return {};
 520     }
 521
 522     my $services = {};
 523
 524     while (my $line = <$fh>) {
 525         chomp ($line);
 526         next if $line =~m/^#/;
 527         next if ($line =~m/^\s*$/);
 528
 529         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 530             $services->{byid}->{$2}->{name} = $1;
 531             $services->{byid}->{$2}->{port} = $2;
 532             $services->{byid}->{$2}->{$3} = 1;
 533             $services->{byname}->{$1} = $services->{byid}->{$2};
 534         }
 535     }
 536
 537     close($fh);
 538
 539     $etc_services = $services;
 540
 541
 542     return $etc_services;
 543 }
 544
 545 my $etc_protocols;
 546
 547 sub get_etc_protocols {
 548     return $etc_protocols if $etc_protocols;
 549
 550     my $filename = "/etc/protocols";
 551
 552     my $fh = IO::File->new($filename, O_RDONLY);
 553     if (!$fh) {
 554         warn "unable to read '$filename' - $!\n";
 555         return {};
 556     }
 557
 558     my $protocols = {};
 559
 560     while (my $line = <$fh>) {
 561         chomp ($line);
 562         next if $line =~m/^#/;
 563         next if ($line =~m/^\s*$/);
 564
 565         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 566             $protocols->{byid}->{$2}->{name} = $1;
 567             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 568         }
 569     }
 570
 571     close($fh);
 572
 573     $etc_protocols = $protocols;
 574
 575     return $etc_protocols;
 576 }
 577
 578 sub parse_address_list {
 579     my ($str) = @_;
 580
 581     my $nbaor = 0;
 582     foreach my $aor (split(/,/, $str)) {
 583         if (!Net::IP->new($aor)) {
 584             my $err = Net::IP::Error();
 585             die "invalid IP address: $err\n";
 586         }else{
 587             $nbaor++;
 588         }
 589     }
 590     return $nbaor;
 591 }
 592
 593 sub parse_port_name_number_or_range {
 594     my ($str) = @_;
 595
 596     my $services = PVE::Firewall::get_etc_services();
 597     my $nbports = 0;
 598     foreach my $item (split(/,/, $str)) {
 599         my $portlist = "";
 600         my $oldpon = undef;
 601         $nbports++;
 602         foreach my $pon (split(':', $item, 2)) {
 603             $pon = $services->{byname}->{$pon}->{port} if $services->{byname}->{$pon}->{port};
 604             if ($pon =~ m/^\d+$/){
 605                 die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535;
 606                 die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon);
 607                 $oldpon = $pon;
 608             }else{
 609                 die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon};
 610             }
 611         }
 612     }
 613
 614     return ($nbports);
 615 }
 616
 617 my $bridge_firewall_enabled = 0;
 618
 619 sub enable_bridge_firewall {
 620
 621     return if $bridge_firewall_enabled; # only once
 622
 623     system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables");
 624     system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-ip6tables");
 625
 626     $bridge_firewall_enabled = 1;
 627 }
 628
 629 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
 630
 631 sub iptables {
 632     my ($cmd) = @_;
 633
 634     run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {});
 635 }
 636
 637 sub iptables_restore_cmdlist {
 638     my ($cmdlist) = @_;
 639
 640     run_command("/sbin/iptables-restore -n", input => $cmdlist);
 641 }
 642
 643 sub iptables_get_chains {
 644
 645     my $res = {};
 646
 647     # check what chains we want to track
 648     my $is_pvefw_chain = sub {
 649         my $name = shift;
 650
 651         return 1 if $name =~ m/^PVEFW-\S+$/;
 652
 653         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
 654         return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT)$/;
 655         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
 656
 657         return undef;
 658     };
 659
 660     my $table = '';
 661
 662     my $parser = sub {
 663         my $line = shift;
 664
 665         return if $line =~ m/^#/;
 666         return if $line =~ m/^\s*$/;
 667
 668         if ($line =~ m/^\*(\S+)$/) {
 669             $table = $1;
 670             return;
 671         }
 672
 673         return if $table ne 'filter';
 674
 675         if ($line =~ m/^:(\S+)\s/) {
 676             my $chain = $1;
 677             return if !&$is_pvefw_chain($chain);
 678             $res->{$chain} = "unknown";
 679         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
 680             my ($chain, $sig) = ($1, $2);
 681             return if !&$is_pvefw_chain($chain);
 682             $res->{$chain} = $sig;
 683         } else {
 684             # simply ignore the rest
 685             return;
 686         }
 687     };
 688
 689     run_command("/sbin/iptables-save", outfunc => $parser);
 690
 691     return $res;
 692 }
 693
 694 sub iptables_chain_exist {
 695     my ($chain) = @_;
 696
 697     eval{
 698         iptables("-n --list $chain");
 699     };
 700     return undef if $@;
 701
 702     return 1;
 703 }
 704
 705 sub iptables_rule_exist {
 706     my ($rule) = @_;
 707
 708     eval{
 709         iptables("-C $rule");
 710     };
 711     return undef if $@;
 712
 713     return 1;
 714 }
 715
 716 sub ruleset_generate_rule {
 717     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
 718
 719     return if $rule->{disable};
 720
 721     my $cmd = '';
 722
 723     $cmd .= " -m iprange --src-range" if $rule->{nbsource} && $rule->{nbsource} > 1;
 724     $cmd .= " -s $rule->{source}" if $rule->{source};
 725     $cmd .= " -m iprange --dst-range" if $rule->{nbdest} && $rule->{nbdest} > 1;
 726     $cmd .= " -d $rule->{dest}" if $rule->{dest};
 727
 728     if ($rule->{proto}) {
 729         $cmd .= " -p $rule->{proto}";
 730
 731         my $multiport = 0;
 732         $multiport++ if $rule->{nbdport} && ($rule->{nbdport} > 1);
 733         $multiport++ if $rule->{nbsport} && ($rule->{nbsport} > 1);
 734
 735         $cmd .= " --match multiport" if $multiport;
 736
 737         die "multiport: option '--sports' cannot be used together with '--dports'\n"
 738             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
 739
 740         if ($rule->{dport}) {
 741             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
 742                 # Note: we use dport to store --icmp-type
 743                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
 744                 $cmd .= " -m icmp --icmp-type $rule->{dport}";
 745             } else {
 746                 if ($rule->{nbdport} && $rule->{nbdport} > 1) {
 747                     if ($multiport == 2) {
 748                         $cmd .= " --ports $rule->{dport}";
 749                     } else {
 750                         $cmd .= " --dports $rule->{dport}";
 751                     }
 752                 } else {
 753                     $cmd .= " --dport $rule->{dport}";
 754                 }
 755             }
 756         }
 757
 758         if ($rule->{sport}) {
 759             if ($rule->{nbsport} && $rule->{nbsport} > 1) {
 760                 $cmd .= " --sports $rule->{sport}" if $multiport != 2;
 761             } else {
 762                 $cmd .= " --sport $rule->{sport}";
 763             }
 764         }
 765     } elsif ($rule->{dport} || $rule->{sport}) {
 766         warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
 767         warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
 768     }
 769
 770     $cmd .= " -m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
 771
 772     if (my $action = $rule->{action}) {
 773         $action = $actions->{$action} if defined($actions->{$action});
 774         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
 775         $cmd .= $goto ? " -g $action" : " -j $action";
 776     }
 777
 778     ruleset_addrule($ruleset, $chain, $cmd) if $cmd;
 779 }
 780
 781 sub ruleset_create_chain {
 782     my ($ruleset, $chain) = @_;
 783
 784     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
 785
 786     die "chain '$chain' already exists\n" if $ruleset->{$chain};
 787
 788     $ruleset->{$chain} = [];
 789 }
 790
 791 sub ruleset_chain_exist {
 792     my ($ruleset, $chain) = @_;
 793
 794     return $ruleset->{$chain} ? 1 : undef;
 795 }
 796
 797 sub ruleset_addrule {
 798    my ($ruleset, $chain, $rule) = @_;
 799
 800    die "no such chain '$chain'\n" if !$ruleset->{$chain};
 801
 802    push @{$ruleset->{$chain}}, "-A $chain $rule";
 803 }
 804
 805 sub ruleset_insertrule {
 806    my ($ruleset, $chain, $rule) = @_;
 807
 808    die "no such chain '$chain'\n" if !$ruleset->{$chain};
 809
 810    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
 811 }
 812
 813 sub generate_bridge_chains {
 814     my ($ruleset, $bridge) = @_;
 815
 816     if (!ruleset_chain_exist($ruleset, "PVEFW-FORWARD")){
 817         ruleset_create_chain($ruleset, "PVEFW-FORWARD");
 818         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
 819     }
 820
 821     if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
 822         ruleset_create_chain($ruleset, "$bridge-FW");
 823         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
 824         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
 825         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j DROP");  # disable interbridge routing
 826         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j DROP"); # disable interbridge routing
 827     }
 828
 829     if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
 830         ruleset_create_chain($ruleset, "$bridge-OUT");
 831         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-in -j $bridge-OUT");
 832     }
 833
 834     if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
 835         ruleset_create_chain($ruleset, "$bridge-IN");
 836         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j $bridge-IN");
 837         ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
 838         # accept traffic to unmanaged bridge ports
 839         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j ACCEPT ");
 840     }
 841 }
 842
 843 sub generate_tap_rules_direction {
 844     my ($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, $direction) = @_;
 845
 846     my $rules = $vmfw_conf->{lc($direction)};
 847     my $options = $vmfw_conf->{options};
 848
 849     my $tapchain = "$iface-$direction";
 850
 851     ruleset_create_chain($ruleset, $tapchain);
 852
 853     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
 854         ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
 855     }
 856
 857     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
 858         ruleset_addrule($ruleset, $tapchain, "-p udp -m udp --dport 67:68 -j ACCEPT");
 859     }
 860
 861     if ($options->{tcpflags}) {
 862         ruleset_addrule($ruleset, $tapchain, "-p tcp -j PVEFW-tcpflags");
 863     }
 864
 865     ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate INVALID -j DROP");
 866     ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
 867
 868     if ($direction eq 'OUT' && defined($macaddr) &&
 869         !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
 870         ruleset_addrule($ruleset, $tapchain, "-m mac ! --mac-source $macaddr -j DROP");
 871     }
 872
 873     if ($rules) {
 874         foreach my $rule (@$rules) {
 875             next if $rule->{iface} && $rule->{iface} ne $netid;
 876             # we go to $bridge-IN if accept in out rules
 877             if($rule->{action}  =~ m/^(GROUP-(\S+))$/){
 878                 $rule->{action} .= "-$direction";
 879                 # generate empty group rule if don't exist
 880                 if(!ruleset_chain_exist($ruleset, $rule->{action})){
 881                     generate_group_rules($ruleset, $group_rules, $2);
 882                 }
 883                 ruleset_generate_rule($ruleset, $tapchain, $rule);
 884                 ruleset_addrule($ruleset, $tapchain, "-m mark --mark 1 -j RETURN")
 885                     if $direction eq 'OUT';
 886             } else {
 887                 if ($direction eq 'OUT') {
 888                     ruleset_generate_rule($ruleset, $tapchain, $rule,
 889                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
 890                 } else {
 891                     ruleset_generate_rule($ruleset, $tapchain, $rule, { REJECT => "PVEFW-reject" });
 892                 }
 893             }
 894         }
 895     }
 896
 897     # implement policy
 898     my $policy;
 899
 900     if ($direction eq 'OUT') {
 901         $policy = $options->{'policy-out'} || 'ACCEPT'; # allow everything by default
 902     } else {
 903         $policy = $options->{'policy-in'} || 'DROP'; # allow everything by default
 904     }
 905
 906     if ($policy eq 'ACCEPT') {
 907         if ($direction eq 'OUT') {
 908             ruleset_addrule($ruleset, $tapchain, "-g PVEFW-SET-ACCEPT-MARK");
 909         } else {
 910             ruleset_addrule($ruleset, $tapchain, "-j ACCEPT");
 911         }
 912     } elsif ($policy eq 'DROP') {
 913         ruleset_addrule($ruleset, $tapchain, "-j PVEFW-Drop");
 914         ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-dropped: \" --log-level 4");
 915         ruleset_addrule($ruleset, $tapchain, "-j DROP");
 916     } elsif ($policy eq 'REJECT') {
 917         ruleset_addrule($ruleset, $tapchain, "-j PVEFW-Reject");
 918         ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-reject: \" --log-level 4");
 919         ruleset_addrule($ruleset, $tapchain, "-g PVEFW-reject");
 920     } else {
 921         # should not happen
 922         die "internal error: unknown policy '$policy'";
 923     }
 924
 925     # plug the tap chain to bridge chain
 926     my $physdevdirection = $direction eq 'IN' ? "out" : "in";
 927     my $rule = "-m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain";
 928     ruleset_insertrule($ruleset, "$bridge-$direction", $rule);
 929
 930     if ($direction eq 'OUT'){
 931         # add tap->host rules
 932         my $rule = "-m physdev --physdev-$physdevdirection $iface -j $tapchain";
 933         ruleset_addrule($ruleset, "PVEFW-INPUT", $rule);
 934     }
 935 }
 936
 937 sub enablehostfw {
 938     my ($ruleset, $rules, $group_rules) = @_;
 939
 940     # fixme: allow security groups
 941
 942     # host inbound firewall
 943     my $chain = "PVEFW-HOST-IN";
 944     ruleset_create_chain($ruleset, $chain);
 945
 946     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
 947     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
 948     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
 949     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
 950     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
 951     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT");  #corosync
 952
 953     if ($rules->{in}) {
 954         foreach my $rule (@{$rules->{in}}) {
 955             # we use RETURN because we need to check also tap rules
 956             ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => 'RETURN', REJECT => "PVEFW-reject" });
 957         }
 958     }
 959
 960     ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-IN dropped: \" --log-level 4");
 961     ruleset_addrule($ruleset, $chain, "-j DROP");
 962
 963     # host outbound firewall
 964     $chain = "PVEFW-HOST-OUT";
 965     ruleset_create_chain($ruleset, $chain);
 966
 967     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
 968     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
 969     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
 970     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
 971     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
 972     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
 973
 974     if ($rules->{out}) {
 975         foreach my $rule (@{$rules->{out}}) {
 976             # we use RETURN because we need to check also tap rules
 977             ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => 'RETURN', REJECT => "PVEFW-reject" });
 978         }
 979     }
 980
 981     ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-OUT dropped: \" --log-level 4");
 982     ruleset_addrule($ruleset, $chain, "-j DROP");
 983
 984     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
 985     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
 986 }
 987
 988 sub generate_group_rules {
 989     my ($ruleset, $group_rules, $group) = @_;
 990
 991     my $rules = $group_rules->{$group};
 992
 993     die "no such security group '$group'\n" if !$rules;
 994
 995     my $chain = "GROUP-${group}-IN";
 996
 997     ruleset_create_chain($ruleset, $chain);
 998
 999     if ($rules->{in}) {
1000         foreach my $rule (@{$rules->{in}}) {
1001             ruleset_generate_rule($ruleset, $chain, $rule, { REJECT => "PVEFW-reject" });
1002         }
1003     }
1004
1005     $chain = "GROUP-${group}-OUT";
1006
1007     ruleset_create_chain($ruleset, $chain);
1008     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1009
1010     if ($rules->{out}) {
1011         foreach my $rule (@{$rules->{out}}) {
1012             # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1013             # check also other tap rules later
1014             ruleset_generate_rule($ruleset, $chain, $rule,
1015                                   { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
1016         }
1017     }
1018 }
1019
1020 my $MAX_NETS = 32;
1021 my $valid_netdev_names = {};
1022 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1023     $valid_netdev_names->{"net$i"} = 1;
1024 }
1025
1026 sub parse_fw_rule {
1027     my ($line, $need_iface, $allow_groups) = @_;
1028
1029     my $macros = get_firewall_macros();
1030     my $protocols = get_etc_protocols();
1031
1032     my ($action, $iface, $source, $dest, $proto, $dport, $sport);
1033
1034     # we can add single line comments to the end of the rule
1035     my $comment = $1 if $line =~ s/#\s*(.*?)\s*$//;
1036
1037     # we can disable a rule when prefixed with '|'
1038     my $disable = 1 if  $line =~ s/^\|//;
1039
1040     my @data = split(/\s+/, $line);
1041     my $expected_elements = $need_iface ? 7 : 6;
1042
1043     die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1044
1045     if ($need_iface) {
1046         ($action, $iface, $source, $dest, $proto, $dport, $sport) = @data
1047     } else {
1048         ($action, $source, $dest, $proto, $dport, $sport) =  @data;
1049     }
1050
1051     die "incomplete rule\n" if !$action;
1052
1053     my $macro;
1054     my $macro_name;
1055
1056     if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1057         # OK
1058     } elsif ($allow_groups && $action =~ m/^GROUP-(:?\S+)$/) {
1059         # OK
1060     } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1061         ($macro_name, $action) = ($1, $2);
1062         my $lc_macro_name = lc($macro_name);
1063         my $preferred_name = $pve_fw_preferred_macro_names->{$lc_macro_name};
1064         $macro_name = $preferred_name if $preferred_name;
1065         $macro = $macros->{$lc_macro_name};
1066         die "unknown macro '$macro_name'\n" if !$macro;
1067     } else {
1068         die "unknown action '$action'\n";
1069     }
1070
1071     if ($need_iface) {
1072         $iface = undef if $iface && $iface eq '-';
1073         die "unknown interface '$iface'\n"
1074             if defined($iface) && !$valid_netdev_names->{$iface};
1075     }
1076
1077     $proto = undef if $proto && $proto eq '-';
1078     die "unknown protokol '$proto'\n" if $proto &&
1079         !(defined($protocols->{byname}->{$proto}) ||
1080           defined($protocols->{byid}->{$proto}));
1081
1082     $source = undef if $source && $source eq '-';
1083     $dest = undef if $dest && $dest eq '-';
1084
1085     $dport = undef if $dport && $dport eq '-';
1086     $sport = undef if $sport && $sport eq '-';
1087
1088     my $nbsource = undef;
1089     my $nbdest = undef;
1090
1091     $nbsource = parse_address_list($source) if $source;
1092     $nbdest = parse_address_list($dest) if $dest;
1093
1094     my $rules = [];
1095
1096     my $param = {
1097         disable => $disable,
1098         comment => $comment,
1099         action => $action,
1100         iface => $iface,
1101         source => $source,
1102         dest => $dest,
1103         nbsource => $nbsource,
1104         nbdest => $nbdest,
1105         proto => $proto,
1106         dport => $dport,
1107         sport => $sport,
1108     };
1109
1110     if ($macro) {
1111         foreach my $templ (@$macro) {
1112             my $rule = {};
1113             my $param_used = {};
1114             foreach my $k (keys %$templ) {
1115                 my $v = $templ->{$k};
1116                 if ($v eq 'PARAM') {
1117                     $v = $param->{$k};
1118                     $param_used->{$k} = 1;
1119                 } elsif ($v eq 'DEST') {
1120                     $v = $param->{dest};
1121                     $param_used->{dest} = 1;
1122                 } elsif ($v eq 'SOURCE') {
1123                     $v = $param->{source};
1124                     $param_used->{source} = 1;
1125                 }
1126
1127                 die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
1128                 $rule->{$k} = $v;
1129             }
1130             foreach my $k (keys %$param) {
1131                 next if !defined($param->{$k});
1132                 next if $param_used->{$k};
1133                 if (defined($rule->{$k})) {
1134                     die "parameter '$k' already define in macro (value = '$rule->{$k}')\n"
1135                         if $rule->{$k} ne $param->{$k};
1136                 } else {
1137                     $rule->{$k} = $param->{$k};
1138                 }
1139             }
1140             push @$rules, $rule;
1141         }
1142     } else {
1143         push @$rules, $param;
1144     }
1145
1146     foreach my $rule (@$rules) {
1147         $rule->{nbdport} = parse_port_name_number_or_range($rule->{dport})
1148             if defined($rule->{dport});
1149         $rule->{nbsport} = parse_port_name_number_or_range($rule->{sport})
1150             if defined($rule->{sport});
1151     }
1152
1153     return $rules;
1154 }
1155
1156 sub parse_fw_option {
1157     my ($line) = @_;
1158
1159     my ($opt, $value);
1160
1161     if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
1162         $opt = lc($1);
1163         $value = int($2);
1164     } elsif ($line =~ m/^(policy-(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1165         $opt = lc($1);
1166         $value = uc($3);
1167     } else {
1168         chomp $line;
1169         die "can't parse option '$line'\n"
1170     }
1171
1172     return ($opt, $value);
1173 }
1174
1175 sub parse_vm_fw_rules {
1176     my ($filename, $fh) = @_;
1177
1178     my $res = { in => [], out => [], options => {}};
1179
1180     my $section;
1181
1182     while (defined(my $line = <$fh>)) {
1183         next if $line =~ m/^#/;
1184         next if $line =~ m/^\s*$/;
1185
1186         my $linenr = $fh->input_line_number();
1187         my $prefix = "$filename (line $linenr)";
1188
1189         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1190             $section = lc($1);
1191             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1192             next;
1193         }
1194         if (!$section) {
1195             warn "$prefix: skip line - no section";
1196             next;
1197         }
1198
1199         next if !$res->{$section}; # skip undefined section
1200
1201         if ($section eq 'options') {
1202             eval {
1203                 my ($opt, $value) = parse_fw_option($line);
1204                 $res->{options}->{$opt} = $value;
1205             };
1206             warn "$prefix: $@" if $@;
1207             next;
1208         }
1209
1210         my $rules;
1211         eval { $rules = parse_fw_rule($line, 1, 1); };
1212         if (my $err = $@) {
1213             warn "$prefix: $err";
1214             next;
1215         }
1216
1217         push @{$res->{$section}}, @$rules;
1218     }
1219
1220     return $res;
1221 }
1222
1223 sub parse_host_fw_rules {
1224     my ($filename, $fh) = @_;
1225
1226     my $res = { in => [], out => [] };
1227
1228     my $section;
1229
1230     while (defined(my $line = <$fh>)) {
1231         next if $line =~ m/^#/;
1232         next if $line =~ m/^\s*$/;
1233
1234         my $linenr = $fh->input_line_number();
1235         my $prefix = "$filename (line $linenr)";
1236
1237         if ($line =~ m/^\[(in|out)\]\s*$/i) {
1238             $section = lc($1);
1239             next;
1240         }
1241         if (!$section) {
1242             warn "$prefix: skip line - no section";
1243             next;
1244         }
1245
1246         my $rules;
1247         eval { $rules = parse_fw_rule($line, 1, 1); };
1248         if (my $err = $@) {
1249             warn "$prefix: $err";
1250             next;
1251         }
1252
1253         push @{$res->{$section}}, @$rules;
1254     }
1255
1256     return $res;
1257 }
1258
1259 sub parse_group_fw_rules {
1260     my ($filename, $fh) = @_;
1261
1262     my $section;
1263     my $group;
1264
1265     my $res = { in => [], out => [] };
1266
1267     while (defined(my $line = <$fh>)) {
1268         next if $line =~ m/^#/;
1269         next if $line =~ m/^\s*$/;
1270
1271         my $linenr = $fh->input_line_number();
1272         my $prefix = "$filename (line $linenr)";
1273
1274         if ($line =~ m/^\[(in|out):(\S+)\]\s*$/i) {
1275             $section = lc($1);
1276             $group = lc($2);
1277             next;
1278         }
1279         if (!$section || !$group) {
1280             warn "$prefix: skip line - no section";
1281             next;
1282         }
1283
1284         my $rules;
1285         eval { $rules = parse_fw_rule($line, 0, 0); };
1286         if (my $err = $@) {
1287             warn "$prefix: $err";
1288             next;
1289         }
1290
1291         push @{$res->{$group}->{$section}}, @$rules;
1292     }
1293
1294     return $res;
1295 }
1296
1297 sub run_locked {
1298     my ($code, @param) = @_;
1299
1300     my $timeout = 10;
1301
1302     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
1303
1304     die $@ if $@;
1305
1306     return $res;
1307 }
1308
1309 sub read_local_vm_config {
1310
1311     my $openvz = {};
1312
1313     my $qemu = {};
1314
1315     my $list = PVE::QemuServer::config_list();
1316
1317     foreach my $vmid (keys %$list) {
1318         my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
1319         if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1320             $qemu->{$vmid} = $conf;
1321         }
1322     }
1323
1324     my $vmdata = { openvz => $openvz, qemu => $qemu };
1325
1326     return $vmdata;
1327 };
1328
1329 sub read_vm_firewall_rules {
1330     my ($vmdata) = @_;
1331     my $rules = {};
1332     foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
1333         my $filename = "/etc/pve/firewall/$vmid.fw";
1334         my $fh = IO::File->new($filename, O_RDONLY);
1335         next if !$fh;
1336
1337         $rules->{$vmid} = parse_vm_fw_rules($filename, $fh);
1338     }
1339
1340     return $rules;
1341 }
1342
1343 sub generate_std_chains {
1344     my ($ruleset) = @_;
1345
1346     foreach my $chain (keys %$pve_std_chains) {
1347         ruleset_create_chain($ruleset, $chain);
1348         foreach my $rule (@{$pve_std_chains->{$chain}}) {
1349             if (ref($rule)) {
1350                 ruleset_generate_rule($ruleset, $chain, $rule);
1351             } else {
1352                 ruleset_addrule($ruleset, $chain, $rule);
1353             }
1354         }
1355     }
1356 }
1357
1358 sub save_pvefw_status {
1359     my ($status) = @_;
1360
1361     die "unknown status '$status' - internal error"
1362         if $status !~ m/^(stopped|active)$/;
1363
1364     mkdir dirname($pve_fw_status_filename);
1365     PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
1366 }
1367
1368 sub read_pvefw_status {
1369
1370     my $status = 'unknown';
1371
1372     return 'stopped' if ! -f $pve_fw_status_filename;
1373
1374     eval {
1375         $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
1376     };
1377     warn $@ if $@;
1378
1379     return $status;
1380 }
1381
1382 sub compile {
1383     my $vmdata = read_local_vm_config();
1384     my $rules = read_vm_firewall_rules($vmdata);
1385
1386     my $group_rules = {};
1387     my $filename = "/etc/pve/firewall/groups.fw";
1388     if (my $fh = IO::File->new($filename, O_RDONLY)) {
1389         $group_rules = parse_group_fw_rules($filename, $fh);
1390     }
1391
1392     #print Dumper($rules);
1393
1394     my $ruleset = {};
1395
1396     ruleset_create_chain($ruleset, "PVEFW-INPUT");
1397     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
1398     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
1399
1400     generate_std_chains($ruleset);
1401
1402     my $enable_hostfw = 0;
1403     $filename = "/etc/pve/local/host.fw";
1404     if (my $fh = IO::File->new($filename, O_RDONLY)) {
1405         my $host_rules = parse_host_fw_rules($filename, $fh);
1406
1407         $enable_hostfw = 1;
1408
1409         enablehostfw($ruleset, $host_rules, $group_rules);
1410     }
1411
1412     # generate firewall rules for QEMU VMs
1413     foreach my $vmid (keys %{$vmdata->{qemu}}) {
1414         my $conf = $vmdata->{qemu}->{$vmid};
1415         my $vmfw_conf = $rules->{$vmid};
1416         next if !$vmfw_conf;
1417         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
1418
1419         foreach my $netid (keys %$conf) {
1420             next if $netid !~ m/^net(\d+)$/;
1421             my $net = PVE::QemuServer::parse_net($conf->{$netid});
1422             next if !$net;
1423             my $iface = "tap${vmid}i$1";
1424
1425             my $bridge = $net->{bridge};
1426             next if !$bridge; # fixme: ?
1427
1428             $bridge .= "v$net->{tag}" if $net->{tag};
1429
1430
1431             generate_bridge_chains($ruleset, $bridge);
1432
1433             my $macaddr = $net->{macaddr};
1434             generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'IN');
1435             generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'OUT');
1436         }
1437     }
1438
1439     if ($enable_hostfw) {
1440         # allow traffic from lo (ourself)
1441         ruleset_addrule($ruleset, "PVEFW-INPUT", "-i lo -j ACCEPT");
1442     }
1443
1444     return $ruleset;
1445 }
1446
1447 sub get_ruleset_status {
1448     my ($ruleset, $verbose) = @_;
1449
1450     my $active_chains = iptables_get_chains();
1451
1452     my $statushash = {};
1453
1454     foreach my $chain (sort keys %$ruleset) {
1455         my $digest = Digest::SHA->new('sha1');
1456         foreach my $cmd (@{$ruleset->{$chain}}) {
1457              $digest->add("$cmd\n");
1458         }
1459         my $sig = $digest->b64digest;
1460         $statushash->{$chain}->{sig} = $sig;
1461
1462         my $oldsig = $active_chains->{$chain};
1463         if (!defined($oldsig)) {
1464             $statushash->{$chain}->{action} = 'create';
1465         } else {
1466             if ($oldsig eq $sig) {
1467                 $statushash->{$chain}->{action} = 'exists';
1468             } else {
1469                 $statushash->{$chain}->{action} = 'update';
1470             }
1471         }
1472         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
1473         foreach my $cmd (@{$ruleset->{$chain}}) {
1474             print "\t$cmd\n" if $verbose;
1475         }
1476     }
1477
1478     foreach my $chain (sort keys %$active_chains) {
1479         if (!defined($ruleset->{$chain})) {
1480             my $sig = $active_chains->{$chain};
1481             $statushash->{$chain}->{action} = 'delete';
1482             $statushash->{$chain}->{sig} = $sig;
1483             print "delete $chain ($sig)\n" if $verbose;
1484         }
1485     }
1486
1487     return $statushash;
1488 }
1489
1490 sub print_ruleset {
1491     my ($ruleset) = @_;
1492
1493     get_ruleset_status($ruleset, 1);
1494 }
1495
1496 sub print_sig_rule {
1497     my ($chain, $sig) = @_;
1498
1499     # We just use this to store a SHA1 checksum used to detect changes
1500     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
1501 }
1502
1503 sub get_rulset_cmdlist {
1504     my ($ruleset, $verbose) = @_;
1505
1506     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
1507
1508     my $statushash = get_ruleset_status($ruleset, $verbose);
1509
1510     # create missing chains first
1511     foreach my $chain (sort keys %$ruleset) {
1512         my $stat = $statushash->{$chain};
1513         die "internal error" if !$stat;
1514         next if $stat->{action} ne 'create';
1515
1516         $cmdlist .= ":$chain - [0:0]\n";
1517     }
1518
1519     my $rule = "INPUT -j PVEFW-INPUT";
1520     if (!PVE::Firewall::iptables_rule_exist($rule)) {
1521         $cmdlist .= "-A $rule\n";
1522     }
1523     $rule = "OUTPUT -j PVEFW-OUTPUT";
1524     if (!PVE::Firewall::iptables_rule_exist($rule)) {
1525         $cmdlist .= "-A $rule\n";
1526     }
1527
1528     $rule = "FORWARD -j PVEFW-FORWARD";
1529     if (!PVE::Firewall::iptables_rule_exist($rule)) {
1530         $cmdlist .= "-A $rule\n";
1531     }
1532
1533     foreach my $chain (sort keys %$ruleset) {
1534         my $stat = $statushash->{$chain};
1535         die "internal error" if !$stat;
1536
1537         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
1538             $cmdlist .= "-F $chain\n";
1539             foreach my $cmd (@{$ruleset->{$chain}}) {
1540                 $cmdlist .= "$cmd\n";
1541             }
1542             $cmdlist .= print_sig_rule($chain, $stat->{sig});
1543         } elsif ($stat->{action} eq 'delete') {
1544             die "internal error"; # this should not happen
1545         } elsif ($stat->{action} eq 'exists') {
1546             # do nothing
1547         } else {
1548             die "internal error - unknown status '$stat->{action}'";
1549         }
1550     }
1551
1552     foreach my $chain (keys %$statushash) {
1553         next if $statushash->{$chain}->{action} ne 'delete';
1554         $cmdlist .= "-F $chain\n";
1555     }
1556     foreach my $chain (keys %$statushash) {
1557         next if $statushash->{$chain}->{action} ne 'delete';
1558         next if $chain eq 'PVEFW-INPUT';
1559         next if $chain eq 'PVEFW-OUTPUT';
1560         next if $chain eq 'PVEFW-FORWARD';
1561         $cmdlist .= "-X $chain\n";
1562     }
1563
1564     $cmdlist .= "COMMIT\n";
1565
1566     return $cmdlist;
1567 }
1568
1569 sub apply_ruleset {
1570     my ($ruleset, $verbose) = @_;
1571
1572     enable_bridge_firewall();
1573
1574     my $cmdlist = get_rulset_cmdlist($ruleset, $verbose);
1575
1576     print $cmdlist if $verbose;
1577
1578     iptables_restore_cmdlist($cmdlist);
1579
1580     # test: re-read status and check if everything is up to date
1581     my $statushash = get_ruleset_status($ruleset);
1582
1583     my $errors;
1584     foreach my $chain (sort keys %$ruleset) {
1585         my $stat = $statushash->{$chain};
1586         if ($stat->{action} ne 'exists') {
1587             warn "unable to update chain '$chain'\n";
1588             $errors = 1;
1589         }
1590     }
1591
1592     die "unable to apply firewall changes\n" if $errors;
1593 }
1594
1595 sub update {
1596     my ($start, $verbose) = @_;
1597
1598     my $code = sub {
1599         my $status = read_pvefw_status();
1600
1601         my $ruleset = PVE::Firewall::compile();
1602
1603         if ($start || $status eq 'active') {
1604
1605             save_pvefw_status('active') if ($status ne 'active');
1606
1607             PVE::Firewall::apply_ruleset($ruleset, $verbose);
1608         } else {
1609             print "Firewall not active (status = $status)\n" if $verbose;
1610         }
1611     };
1612
1613     run_locked($code);
1614 }
1615
1616
1617 1;