15 use PVE
::Tools
qw(run_command lock_file);
17 # dynamically include PVE::QemuServer and PVE::OpenVZ
18 # to avoid dependency problems
21 require PVE
::QemuServer
;
22 $have_qemu_server = 1;
28 $have_pve_manager = 1;
33 my $nodename = PVE
::INotify
::nodename
();
35 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
36 my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
38 my $default_log_level = 'info';
40 my $log_level_hash = {
51 # imported/converted from: /usr/share/shorewall/macro.*
54 { action
=> 'PARAM', proto
=> 'udp', dport
=> '10080' },
55 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10080' },
58 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '113' },
61 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '179' },
64 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6889' },
65 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
68 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6999' },
69 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
72 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2401' },
75 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1494' },
76 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1604' },
77 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2598' },
80 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3689' },
81 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3689' },
84 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6277' },
87 { action
=> 'PARAM', proto
=> 'udp', dport
=> '67:68', sport
=> '67:68' },
88 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '67:68', sport
=> '67:68' },
91 { action
=> 'PARAM', proto
=> 'udp', dport
=> '53' },
92 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '53' },
95 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3632' },
98 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '4662' },
99 { action
=> 'PARAM', proto
=> 'udp', dport
=> '4665' },
102 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '21' },
105 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '79' },
108 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2086' },
109 { action
=> 'PARAM', proto
=> 'udp', dport
=> '2086' },
110 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1080' },
111 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1080' },
114 { action
=> 'PARAM', proto
=> '47' },
115 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '47' },
118 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9418' },
121 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6346' },
122 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6346' },
125 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '11371' },
128 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
131 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
134 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3130' },
137 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5190' },
140 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '143' },
143 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '993' },
146 { action
=> 'PARAM', proto
=> '94' },
147 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '94' },
150 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '631' },
153 { action
=> 'PARAM', proto
=> 'udp', dport
=> '631' },
156 { action
=> 'PARAM', source
=> 'SOURCE', dest
=> 'DEST', proto
=> 'tcp', dport
=> '631' },
157 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '631' },
160 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
161 { action
=> 'PARAM', proto
=> '50' },
162 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '500', sport
=> '500' },
163 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '50' },
166 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
167 { action
=> 'PARAM', proto
=> '51' },
168 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '500', sport
=> '500' },
169 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '51' },
172 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500' },
173 { action
=> 'PARAM', proto
=> 'udp', dport
=> '4500' },
174 { action
=> 'PARAM', proto
=> '50' },
175 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '500' },
176 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '4500' },
177 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '50' },
180 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6667' },
183 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5222' },
186 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5223' },
189 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5269' },
192 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9100' },
195 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1701' },
196 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '1701' },
199 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '389' },
202 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '636' },
205 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1863' },
208 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1433' },
211 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
212 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
213 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
216 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '4949' },
219 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3306' },
222 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '119' },
225 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '563' },
228 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
231 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
232 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '123' },
235 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
236 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '123' },
239 { action
=> 'PARAM', proto
=> '89' },
242 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1194' },
245 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5632' },
246 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5631' },
249 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '110' },
252 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '995' },
255 { action
=> 'PARAM', proto
=> '47' },
256 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '47' },
257 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1723' },
260 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
263 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5432' },
266 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '515' },
269 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3389' },
272 { action
=> 'PARAM', proto
=> 'udp', dport
=> '520' },
273 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '520' },
276 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '953' },
279 { action
=> 'ACCEPT', proto
=> 'tcp', dport
=> '2703' },
282 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
285 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '873' },
288 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6566' },
291 { action
=> 'PARAM', proto
=> 'udp', dport
=> '135,445' },
292 { action
=> 'PARAM', proto
=> 'udp', dport
=> '137:139' },
293 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
294 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '135,139,445' },
297 { action
=> 'PARAM', proto
=> 'udp', dport
=> '135,445' },
298 { action
=> 'PARAM', proto
=> 'udp', dport
=> '137:139' },
299 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
300 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '135,139,445' },
301 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '135,445' },
302 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '137:139' },
303 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
304 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'tcp', dport
=> '135,139,445' },
307 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '901' },
310 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
313 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
316 { action
=> 'PARAM', proto
=> 'udp', dport
=> '161:162' },
317 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '161' },
320 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '783' },
323 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '22' },
326 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3690' },
329 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3874' },
330 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3740' },
331 { action
=> 'PARAM', proto
=> '41' },
332 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5072,8374' },
335 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3128' },
338 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
341 { action
=> 'PARAM', proto
=> 'udp', dport
=> '514' },
342 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '514' },
345 { action
=> 'PARAM', proto
=> 'udp', dport
=> '69' },
348 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '23' },
351 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '992' },
354 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
357 { action
=> 'PARAM', proto
=> 'udp', dport
=> '33434:33524' },
358 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
361 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5900:5909' },
364 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5500' },
367 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
368 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
371 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '8080' },
374 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10000' },
377 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '43' },
381 my $pve_fw_parsed_macros;
382 my $pve_fw_preferred_macro_names = {};
384 my $pve_std_chains = {
385 'PVEFW-SET-ACCEPT-MARK' => [
386 "-j MARK --set-mark 1",
388 'PVEFW-DropBroadcast' => [
389 # same as shorewall 'Broadcast'
390 # simply DROP BROADCAST/MULTICAST/ANYCAST
391 # we can use this to reduce logging
392 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
393 { action
=> 'DROP', dsttype
=> 'MULTICAST' },
394 { action
=> 'DROP', dsttype
=> 'ANYCAST' },
395 { action
=> 'DROP', dest
=> '224.0.0.0/4' },
398 # same as shorewall 'reject'
399 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
400 { action
=> 'DROP', source
=> '224.0.0.0/4' },
401 { action
=> 'DROP', proto
=> 'icmp' },
402 "-p tcp -j REJECT --reject-with tcp-reset",
403 "-p udp -j REJECT --reject-with icmp-port-unreachable",
404 "-p icmp -j REJECT --reject-with icmp-host-unreachable",
405 "-j REJECT --reject-with icmp-host-prohibited",
408 # same as shorewall 'Drop', which is equal to DROP,
409 # but REJECT/DROP some packages to reduce logging,
410 # and ACCEPT critical ICMP types
411 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
412 # we are not interested in BROADCAST/MULTICAST/ANYCAST
413 { action
=> 'PVEFW-DropBroadcast' },
414 # ACCEPT critical ICMP types
415 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
416 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
417 # Drop packets with INVALID state
418 "-m conntrack --ctstate INVALID -j DROP",
419 # Drop Microsoft SMB noise
420 { action
=> 'DROP', proto
=> 'udp', dport
=> '135,445', nbdport
=> 2 },
421 { action
=> 'DROP', proto
=> 'udp', dport
=> '137:139'},
422 { action
=> 'DROP', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
423 { action
=> 'DROP', proto
=> 'tcp', dport
=> '135,139,445', nbdport
=> 3 },
424 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
425 # Drop new/NotSyn traffic so that it doesn't get logged
426 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
428 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
431 # same as shorewall 'Reject', which is equal to Reject,
432 # but REJECT/DROP some packages to reduce logging,
433 # and ACCEPT critical ICMP types
434 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
435 # we are not interested in BROADCAST/MULTICAST/ANYCAST
436 { action
=> 'PVEFW-DropBroadcast' },
437 # ACCEPT critical ICMP types
438 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
439 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
440 # Drop packets with INVALID state
441 "-m conntrack --ctstate INVALID -j DROP",
442 # Drop Microsoft SMB noise
443 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '135,445', nbdport
=> 2 },
444 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '137:139'},
445 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
446 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '135,139,445', nbdport
=> 3 },
447 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
448 # Drop new/NotSyn traffic so that it doesn't get logged
449 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
451 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
453 'PVEFW-tcpflags' => [
454 # same as shorewall tcpflags action.
455 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
456 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
457 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
458 "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
459 "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
460 "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
463 # same as shorewall smurfs action
464 # Filter packets for smurfs (packets with a broadcast address as the source).
465 "-s 0.0.0.0/32 -j RETURN",
466 "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
467 "-s 224.0.0.0/4 -g PVEFW-smurflog",
471 # iptables -p icmp -h
472 my $icmp_type_names = {
475 'destination-unreachable' => 1,
476 'network-unreachable' => 1,
477 'host-unreachable' => 1,
478 'protocol-unreachable' => 1,
479 'port-unreachable' => 1,
480 'fragmentation-needed' => 1,
481 'source-route-failed' => 1,
482 'network-unknown' => 1,
484 'network-prohibited' => 1,
485 'host-prohibited' => 1,
486 'TOS-network-unreachable' => 1,
487 'TOS-host-unreachable' => 1,
488 'communication-prohibited' => 1,
489 'host-precedence-violation' => 1,
490 'precedence-cutoff' => 1,
491 'source-quench' => 1,
493 'network-redirect' => 1,
494 'host-redirect' => 1,
495 'TOS-network-redirect' => 1,
496 'TOS-host-redirect' => 1,
498 'router-advertisement' => 1,
499 'router-solicitation' => 1,
500 'time-exceeded' => 1,
501 'ttl-zero-during-transit' => 1,
502 'ttl-zero-during-reassembly' => 1,
503 'parameter-problem' => 1,
504 'ip-header-bad' => 1,
505 'required-option-missing' => 1,
506 'timestamp-request' => 1,
507 'timestamp-reply' => 1,
508 'address-mask-request' => 1,
509 'address-mask-reply' => 1,
512 sub get_firewall_macros
{
514 return $pve_fw_parsed_macros if $pve_fw_parsed_macros;
516 $pve_fw_parsed_macros = {};
518 foreach my $k (keys %$pve_fw_macros) {
521 my $macro = $pve_fw_macros->{$k};
522 $pve_fw_preferred_macro_names->{$name} = $k;
523 $pve_fw_parsed_macros->{$name} = $macro;
526 return $pve_fw_parsed_macros;
531 sub get_etc_services
{
533 return $etc_services if $etc_services;
535 my $filename = "/etc/services";
537 my $fh = IO
::File-
>new($filename, O_RDONLY
);
539 warn "unable to read '$filename' - $!\n";
545 while (my $line = <$fh>) {
547 next if $line =~m/^#/;
548 next if ($line =~m/^\s*$/);
550 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
551 $services->{byid
}->{$2}->{name
} = $1;
552 $services->{byid
}->{$2}->{port
} = $2;
553 $services->{byid
}->{$2}->{$3} = 1;
554 $services->{byname
}->{$1} = $services->{byid
}->{$2};
560 $etc_services = $services;
563 return $etc_services;
568 sub get_etc_protocols
{
569 return $etc_protocols if $etc_protocols;
571 my $filename = "/etc/protocols";
573 my $fh = IO
::File-
>new($filename, O_RDONLY
);
575 warn "unable to read '$filename' - $!\n";
581 while (my $line = <$fh>) {
583 next if $line =~m/^#/;
584 next if ($line =~m/^\s*$/);
586 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
587 $protocols->{byid
}->{$2}->{name
} = $1;
588 $protocols->{byname
}->{$1} = $protocols->{byid
}->{$2};
594 $etc_protocols = $protocols;
596 return $etc_protocols;
599 sub parse_address_list
{
603 foreach my $aor (split(/,/, $str)) {
604 if (!Net
::IP-
>new($aor)) {
605 my $err = Net
::IP
::Error
();
606 die "invalid IP address: $err\n";
614 sub parse_port_name_number_or_range
{
617 my $services = PVE
::Firewall
::get_etc_services
();
619 foreach my $item (split(/,/, $str)) {
623 foreach my $pon (split(':', $item, 2)) {
624 $pon = $services->{byname
}->{$pon}->{port
} if $services->{byname
}->{$pon}->{port
};
625 if ($pon =~ m/^\d+$/){
626 die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535;
627 die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon);
630 die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname
}->{$pon};
638 my $bridge_firewall_enabled = 0;
640 sub enable_bridge_firewall
{
642 return if $bridge_firewall_enabled; # only once
644 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
645 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
647 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
648 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/ipv4/tcp_syncookies", "1");
650 $bridge_firewall_enabled = 1;
653 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
658 run_command
("/sbin/iptables $cmd", outfunc
=> sub {}, errfunc
=> sub {});
661 sub iptables_restore_cmdlist
{
664 run_command
("/sbin/iptables-restore -n", input
=> $cmdlist);
667 sub iptables_get_chains
{
671 # check what chains we want to track
672 my $is_pvefw_chain = sub {
675 return 1 if $name =~ m/^PVEFW-\S+$/;
677 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
679 return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
681 return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
683 return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT)$/;
684 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
694 return if $line =~ m/^#/;
695 return if $line =~ m/^\s*$/;
697 if ($line =~ m/^\*(\S+)$/) {
702 return if $table ne 'filter';
704 if ($line =~ m/^:(\S+)\s/) {
706 return if !&$is_pvefw_chain($chain);
707 $res->{$chain} = "unknown";
708 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
709 my ($chain, $sig) = ($1, $2);
710 return if !&$is_pvefw_chain($chain);
711 $res->{$chain} = $sig;
713 # simply ignore the rest
718 run_command
("/sbin/iptables-save", outfunc
=> $parser);
723 sub iptables_chain_exist
{
727 iptables
("-n --list $chain");
734 sub iptables_rule_exist
{
738 iptables
("-C $rule");
745 sub ruleset_generate_cmdstr
{
746 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
748 return if $rule->{disable
};
752 push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in
};
753 push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out
};
755 push @cmd, "-m iprange --src-range" if $rule->{nbsource
} && $rule->{nbsource
} > 1;
756 push @cmd, "-s $rule->{source}" if $rule->{source
};
757 push @cmd, "-m iprange --dst-range" if $rule->{nbdest
} && $rule->{nbdest
} > 1;
758 push @cmd, "-d $rule->{dest}" if $rule->{dest
};
760 if ($rule->{proto
}) {
761 push @cmd, "-p $rule->{proto}";
764 $multiport++ if $rule->{nbdport
} && ($rule->{nbdport
} > 1);
765 $multiport++ if $rule->{nbsport
} && ($rule->{nbsport
} > 1);
767 push @cmd, "--match multiport" if $multiport;
769 die "multiport: option '--sports' cannot be used together with '--dports'\n"
770 if ($multiport == 2) && ($rule->{dport
} ne $rule->{sport
});
772 if ($rule->{dport
}) {
773 if ($rule->{proto
} && $rule->{proto
} eq 'icmp') {
774 # Note: we use dport to store --icmp-type
775 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport
}});
776 push @cmd, "-m icmp --icmp-type $rule->{dport}";
778 if ($rule->{nbdport
} && $rule->{nbdport
} > 1) {
779 if ($multiport == 2) {
780 push @cmd, "--ports $rule->{dport}";
782 push @cmd, "--dports $rule->{dport}";
785 push @cmd, "--dport $rule->{dport}";
790 if ($rule->{sport
}) {
791 if ($rule->{nbsport
} && $rule->{nbsport
} > 1) {
792 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
794 push @cmd, "--sport $rule->{sport}";
797 } elsif ($rule->{dport
} || $rule->{sport
}) {
798 warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport
};
799 warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport
};
802 push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype
};
804 if (my $action = $rule->{action
}) {
805 $action = $actions->{$action} if defined($actions->{$action});
806 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
807 push @cmd, $goto ?
"-g $action" : "-j $action";
810 return scalar(@cmd) ?
join(' ', @cmd) : undef;
813 sub ruleset_generate_rule
{
814 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
816 if (my $cmdstr = ruleset_generate_cmdstr
($ruleset, $chain, $rule, $actions, $goto)) {
817 ruleset_addrule
($ruleset, $chain, $cmdstr);
820 sub ruleset_generate_rule_insert
{
821 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
823 if (my $cmdstr = ruleset_generate_cmdstr
($ruleset, $chain, $rule, $actions, $goto)) {
824 ruleset_insertrule
($ruleset, $chain, $cmdstr);
828 sub ruleset_create_chain
{
829 my ($ruleset, $chain) = @_;
831 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
832 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
834 die "chain '$chain' already exists\n" if $ruleset->{$chain};
836 $ruleset->{$chain} = [];
839 sub ruleset_chain_exist
{
840 my ($ruleset, $chain) = @_;
842 return $ruleset->{$chain} ?
1 : undef;
845 sub ruleset_addrule
{
846 my ($ruleset, $chain, $rule) = @_;
848 die "no such chain '$chain'\n" if !$ruleset->{$chain};
850 push @{$ruleset->{$chain}}, "-A $chain $rule";
853 sub ruleset_insertrule
{
854 my ($ruleset, $chain, $rule) = @_;
856 die "no such chain '$chain'\n" if !$ruleset->{$chain};
858 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
861 sub get_log_rule_base
{
862 my ($chain, $vmid, $msg, $loglevel) = @_;
864 die "internal error - no log level" if !defined($loglevel);
866 $vmid = 0 if !defined($vmid);
868 # Note: we use special format for prefix to pass further
869 # info to log daemon (VMID, LOGVELEL and CHAIN)
871 return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
875 my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
877 return if !defined($loglevel);
879 my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
881 $logrule = "$rule $logrule" if defined($rule);
883 ruleset_addrule($ruleset, $chain, $logrule)
886 sub generate_bridge_chains {
887 my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_;
889 my $options = $hostfw_conf->{options} || {};
891 die "error
: detected direct route to bridge
'$bridge'\n"
892 if !$options->{allow_bridge_route} && $routing_table->{$bridge};
894 if (!ruleset_chain_exist($ruleset, "$bridge-FW
")) {
895 ruleset_create_chain($ruleset, "$bridge-FW
");
896 ruleset_addrule($ruleset, "PVEFW-FORWARD
", "-o
$bridge -m physdev
--physdev-is-out
-j
$bridge-FW
");
897 ruleset_addrule($ruleset, "PVEFW-FORWARD
", "-i
$bridge -m physdev
--physdev-is-in
-j
$bridge-FW
");
900 if (!ruleset_chain_exist($ruleset, "$bridge-OUT
")) {
901 ruleset_create_chain($ruleset, "$bridge-OUT
");
902 ruleset_addrule($ruleset, "$bridge-FW
", "-m physdev
--physdev-is-in
-j
$bridge-OUT
");
903 ruleset_insertrule($ruleset, "PVEFW-INPUT
", "-i
$bridge -m physdev
--physdev-is-in
-j
$bridge-OUT
");
906 if (!ruleset_chain_exist($ruleset, "$bridge-IN
")) {
907 ruleset_create_chain($ruleset, "$bridge-IN
");
908 ruleset_addrule($ruleset, "$bridge-FW
", "-m physdev
--physdev-is-out
-j
$bridge-IN
");
909 ruleset_addrule($ruleset, "$bridge-FW
", "-m mark
--mark
1 -j ACCEPT
");
910 # accept traffic to unmanaged bridge ports
911 ruleset_addrule($ruleset, "$bridge-FW
", "-m physdev
--physdev-is-out
-j ACCEPT
");
915 sub ruleset_add_chain_policy {
916 my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
918 if ($policy eq 'ACCEPT') {
920 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
921 { ACCEPT => $accept_action});
923 } elsif ($policy eq 'DROP') {
925 ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop
");
927 ruleset_addlog($ruleset, $chain, $vmid, "policy
$policy: ", $loglevel);
929 ruleset_addrule($ruleset, $chain, "-j DROP
");
930 } elsif ($policy eq 'REJECT') {
931 ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject
");
933 ruleset_addlog($ruleset, $chain, $vmid, "policy
$policy: ", $loglevel);
935 ruleset_addrule($ruleset, $chain, "-g PVEFW-reject
");
938 die "internal error
: unknown policy
'$policy'";
942 sub ruleset_create_vm_chain {
943 my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
945 ruleset_create_chain($ruleset, $chain);
947 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
948 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
,NEW
-j PVEFW-smurfs
");
951 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
952 ruleset_addrule($ruleset, $chain, "-p udp
-m udp
--dport
67:68 -j ACCEPT
");
955 if ($options->{tcpflags}) {
956 ruleset_addrule($ruleset, $chain, "-p tcp
-j PVEFW-tcpflags
");
959 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
-j DROP
");
960 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
-j ACCEPT
");
962 if ($direction eq 'OUT') {
963 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
964 ruleset_addrule($ruleset, $chain, "-m mac
! --mac-source
$macaddr -j DROP
");
966 ruleset_addrule($ruleset, $chain, "-j MARK
--set-mark
0"); # clear mark
970 sub ruleset_generate_vm_rules {
971 my ($ruleset, $rules, $groups_conf, $chain, $netid, $direction) = @_;
973 my $lc_direction = lc($direction);
975 foreach my $rule (@$rules) {
976 next if $rule->{iface} && $rule->{iface} ne $netid;
977 next if $rule->{disable};
978 if ($rule->{type} eq 'group') {
979 my $group_chain = "GROUP-
$rule->{action
}-$direction";
980 if(!ruleset_chain_exist($ruleset, $group_chain)){
981 generate_group_rules($ruleset, $groups_conf, $rule->{action});
983 ruleset_addrule($ruleset, $chain, "-j
$group_chain");
984 ruleset_addrule($ruleset, $chain, "-m mark
--mark
1 -j RETURN
")
985 if $direction eq 'OUT';
987 next if $rule->{type} ne $lc_direction;
988 if ($direction eq 'OUT') {
989 ruleset_generate_rule($ruleset, $chain, $rule,
990 { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" });
992 ruleset_generate_rule($ruleset, $chain, $rule, { REJECT => "PVEFW-reject
" });
998 sub generate_venet_rules_direction {
999 my ($ruleset, $groups_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1001 parse_address_list($ip); # make sure we have a valid $ip list
1003 my $lc_direction = lc($direction);
1005 my $rules = $vmfw_conf->{rules};
1007 my $options = $vmfw_conf->{options};
1008 my $loglevel = get_option_log_level($options, "log_level_
${lc_direction
}");
1010 my $chain = "venet0-
$vmid-$direction";
1012 ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1014 ruleset_generate_vm_rules($ruleset, $rules, $groups_conf, $chain, 'venet', $direction);
1019 if ($direction eq 'OUT') {
1020 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1022 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1025 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : "ACCEPT
";
1026 ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1028 # plug into FORWARD, INPUT and OUTPUT chain
1029 if ($direction eq 'OUT') {
1030 ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD
", {
1033 iface_in => 'venet0'});
1035 ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT
", {
1038 iface_in => 'venet0'});
1040 ruleset_generate_rule($ruleset, "PVEFW-FORWARD
", {
1043 iface_out => 'venet0'});
1045 ruleset_generate_rule($ruleset, "PVEFW-OUTPUT
", {
1048 iface_out => 'venet0'});
1052 sub generate_tap_rules_direction {
1053 my ($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_;
1055 my $lc_direction = lc($direction);
1057 my $rules = $vmfw_conf->{rules};
1059 my $options = $vmfw_conf->{options};
1060 my $loglevel = get_option_log_level($options, "log_level_
${lc_direction
}");
1062 my $tapchain = "$iface-$direction";
1064 ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1066 ruleset_generate_vm_rules($ruleset, $rules, $groups_conf, $tapchain, $netid, $direction);
1071 if ($direction eq 'OUT') {
1072 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1074 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1077 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : "ACCEPT
";
1078 ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1080 # plug the tap chain to bridge chain
1081 if ($direction eq 'IN') {
1082 ruleset_insertrule($ruleset, "$bridge-IN
",
1083 "-m physdev
--physdev-is-bridged
--physdev-out
$iface -j
$tapchain");
1085 ruleset_insertrule($ruleset, "$bridge-OUT
",
1086 "-m physdev
--physdev-in
$iface -j
$tapchain");
1090 sub enable_host_firewall {
1091 my ($ruleset, $hostfw_conf, $groups_conf) = @_;
1093 # fixme: allow security groups
1095 my $options = $hostfw_conf->{options};
1096 my $rules = $hostfw_conf->{rules};
1098 # host inbound firewall
1099 my $chain = "PVEFW-HOST-IN
";
1100 ruleset_create_chain($ruleset, $chain);
1102 my $loglevel = get_option_log_level($options, "log_level_in
");
1104 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
-j DROP
");
1105 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
-j ACCEPT
");
1106 ruleset_addrule($ruleset, $chain, "-i lo
-j ACCEPT
");
1107 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
-j ACCEPT
");
1108 ruleset_addrule($ruleset, $chain, "-p udp
-m conntrack
--ctstate NEW
--dport
5404:5405 -j ACCEPT
");
1109 ruleset_addrule($ruleset, $chain, "-p udp
-m udp
--dport
9000 -j ACCEPT
"); #corosync
1111 # we use RETURN because we need to check also tap rules
1112 my $accept_action = 'RETURN';
1114 foreach my $rule (@$rules) {
1115 next if $rule->{type} ne 'in';
1116 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" });
1119 # implement input policy
1120 my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1121 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1123 # host outbound firewall
1124 $chain = "PVEFW-HOST-OUT
";
1125 ruleset_create_chain($ruleset, $chain);
1127 $loglevel = get_option_log_level($options, "log_level_out
");
1129 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
-j DROP
");
1130 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
-j ACCEPT
");
1131 ruleset_addrule($ruleset, $chain, "-o lo
-j ACCEPT
");
1132 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
-j ACCEPT
");
1133 ruleset_addrule($ruleset, $chain, "-p udp
-m conntrack
--ctstate NEW
--dport
5404:5405 -j ACCEPT
");
1134 ruleset_addrule($ruleset, $chain, "-p udp
-m udp
--dport
9000 -j ACCEPT
"); #corosync
1136 # we use RETURN because we may want to check other thigs later
1137 $accept_action = 'RETURN';
1139 foreach my $rule (@$rules) {
1140 next if $rule->{type} ne 'out';
1141 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" });
1144 # implement output policy
1145 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1146 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1148 ruleset_addrule($ruleset, "PVEFW-OUTPUT
", "-j PVEFW-HOST-OUT
");
1149 ruleset_addrule($ruleset, "PVEFW-INPUT
", "-j PVEFW-HOST-IN
");
1152 sub generate_group_rules {
1153 my ($ruleset, $groups_conf, $group) = @_;
1155 die "no such security group
'$group'\n" if !$groups_conf->{$group};
1157 my $rules = $groups_conf->{rules}->{$group};
1159 my $chain = "GROUP-
${group
}-IN
";
1161 ruleset_create_chain($ruleset, $chain);
1163 foreach my $rule (@$rules) {
1164 next if $rule->{type} ne 'in';
1165 ruleset_generate_rule($ruleset, $chain, $rule, { REJECT => "PVEFW-reject
" });
1168 $chain = "GROUP-
${group
}-OUT
";
1170 ruleset_create_chain($ruleset, $chain);
1171 ruleset_addrule($ruleset, $chain, "-j MARK
--set-mark
0"); # clear mark
1173 foreach my $rule (@$rules) {
1174 next if $rule->{type} ne 'out';
1175 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1176 # check also other tap rules later
1177 ruleset_generate_rule($ruleset, $chain, $rule,
1178 { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject
" });
1183 my $valid_netdev_names = {};
1184 for (my $i = 0; $i < $MAX_NETS; $i++) {
1185 $valid_netdev_names->{"net
$i"} = 1;
1189 my ($line, $need_iface, $allow_groups) = @_;
1191 my $macros = get_firewall_macros();
1192 my $protocols = get_etc_protocols();
1194 my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
1196 # we can add single line comments to the end of the rule
1197 my $comment = $1 if $line =~ s/#\s*(.*?)\s*$//;
1199 # we can disable a rule when prefixed with '|'
1200 my $disable = 1 if $line =~ s/^\|//;
1202 my @data = split(/\s+/, $line);
1203 my $expected_elements = $need_iface ? 8 : 7;
1205 die "wrong number of rule elements
\n" if scalar(@data) > $expected_elements;
1208 ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
1210 ($type, $action, $source, $dest, $proto, $dport, $sport) = @data;
1213 die "incomplete rule
\n" if ! ($type && $action);
1220 if ($type eq 'in' || $type eq 'out') {
1221 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1223 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1224 ($macro_name, $action) = ($1, $2);
1225 my $lc_macro_name = lc($macro_name);
1226 my $preferred_name = $pve_fw_preferred_macro_names->{$lc_macro_name};
1227 $macro_name = $preferred_name if $preferred_name;
1228 $macro = $macros->{$lc_macro_name};
1229 die "unknown
macro '$macro_name'\n" if !$macro;
1231 die "unknown action
'$action'\n";
1233 } elsif ($type eq 'group') {
1234 die "wrong number of rule elements
\n" if scalar(@data) != 3;
1235 die "groups disabled
\n" if !$allow_groups;
1237 die "invalid characters
in group name
\n" if $action !~ m/^[A-Za-z0-9_\-]+$/;
1239 die "unknown rule type
'$type'\n";
1243 $iface = undef if $iface && $iface eq '-';
1246 $proto = undef if $proto && $proto eq '-';
1247 die "unknown protokol
'$proto'\n" if $proto &&
1248 !(defined($protocols->{byname}->{$proto}) ||
1249 defined($protocols->{byid}->{$proto}));
1251 $source = undef if $source && $source eq '-';
1252 $dest = undef if $dest && $dest eq '-';
1254 $dport = undef if $dport && $dport eq '-';
1255 $sport = undef if $sport && $sport eq '-';
1257 my $nbsource = undef;
1260 $nbsource = parse_address_list($source) if $source;
1261 $nbdest = parse_address_list($dest) if $dest;
1267 disable => $disable,
1268 comment => $comment,
1273 nbsource => $nbsource,
1281 foreach my $templ (@$macro) {
1283 my $param_used = {};
1284 foreach my $k (keys %$templ) {
1285 my $v = $templ->{$k};
1286 if ($v eq 'PARAM') {
1288 $param_used->{$k} = 1;
1289 } elsif ($v eq 'DEST') {
1290 $v = $param->{dest};
1291 $param_used->{dest} = 1;
1292 } elsif ($v eq 'SOURCE') {
1293 $v = $param->{source};
1294 $param_used->{source} = 1;
1297 die "missing parameter
'$k' in macro '$macro_name'\n" if !defined($v);
1300 foreach my $k (keys %$param) {
1301 next if !defined($param->{$k});
1302 next if $param_used->{$k};
1303 if (defined($rule->{$k})) {
1304 die "parameter
'$k' already define
in macro (value
= '$rule->{$k}')\n"
1305 if $rule->{$k} ne $param->{$k};
1307 $rule->{$k} = $param->{$k};
1310 push @$rules, $rule;
1313 push @$rules, $param;
1316 foreach my $rule (@$rules) {
1317 $rule->{nbdport} = parse_port_name_number_or_range($rule->{dport})
1318 if defined($rule->{dport});
1319 $rule->{nbsport} = parse_port_name_number_or_range($rule->{sport})
1320 if defined($rule->{sport});
1326 sub parse_vmfw_option {
1331 my $loglevels = "emerg
|alert
|crit
|err
|warning
|notice
|info
|debug
|nolog
";
1333 if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
1336 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1338 $value = $2 ? lc($3) : '';
1339 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1344 die "can
't parse option '$line'\n"
1347 return ($opt, $value);
1350 sub parse_hostfw_option {
1355 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1357 if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags|allow_bridge_route):\s*(0|1)\s*$/i) {
1360 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1362 $value = $2 ? lc($3) : '';
1363 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1366 } elsif ($line =~ m/^(nf_conntrack_max):\s*(\d+)\s*$/i) {
1371 die "can't parse option
'$line'\n"
1374 return ($opt, $value);
1377 sub parse_vm_fw_rules {
1378 my ($filename, $fh) = @_;
1380 my $res = { rules => [], options => {}};
1384 while (defined(my $line = <$fh>)) {
1385 next if $line =~ m/^#/;
1386 next if $line =~ m/^\s*$/;
1388 my $linenr = $fh->input_line_number();
1389 my $prefix = "$filename (line
$linenr)";
1391 if ($line =~ m/^\[(\S+)\]\s*$/i) {
1393 warn "$prefix: ignore unknown section
'$section'\n" if !$res->{$section};
1397 warn "$prefix: skip line
- no section
";
1401 next if !$res->{$section}; # skip undefined section
1403 if ($section eq 'options') {
1405 my ($opt, $value) = parse_vmfw_option($line);
1406 $res->{options}->{$opt} = $value;
1408 warn "$prefix: $@" if $@;
1413 eval { $rules = parse_fw_rule($line, 1, 1); };
1415 warn "$prefix: $err";
1419 push @{$res->{$section}}, @$rules;
1425 sub parse_host_fw_rules {
1426 my ($filename, $fh) = @_;
1428 my $res = { rules => [], options => {}};
1432 while (defined(my $line = <$fh>)) {
1433 next if $line =~ m/^#/;
1434 next if $line =~ m/^\s*$/;
1436 my $linenr = $fh->input_line_number();
1437 my $prefix = "$filename (line
$linenr)";
1439 if ($line =~ m/^\[(\S+)\]\s*$/i) {
1441 warn "$prefix: ignore unknown section
'$section'\n" if !$res->{$section};
1445 warn "$prefix: skip line
- no section
";
1449 next if !$res->{$section}; # skip undefined section
1451 if ($section eq 'options') {
1453 my ($opt, $value) = parse_hostfw_option($line);
1454 $res->{options}->{$opt} = $value;
1456 warn "$prefix: $@" if $@;
1461 eval { $rules = parse_fw_rule($line, 1, 1); };
1463 warn "$prefix: $err";
1467 push @{$res->{$section}}, @$rules;
1473 sub parse_group_fw_rules {
1474 my ($filename, $fh) = @_;
1479 my $res = { rules => {} };
1481 while (defined(my $line = <$fh>)) {
1482 next if $line =~ m/^#/;
1483 next if $line =~ m/^\s*$/;
1485 my $linenr = $fh->input_line_number();
1486 my $prefix = "$filename (line
$linenr)";
1488 if ($line =~ m/^\[group\s+(\S+)\]\s*$/i) {
1493 if (!$section || !$group) {
1494 warn "$prefix: skip line
- no section
";
1499 eval { $rules = parse_fw_rule($line, 0, 0); };
1501 warn "$prefix: $err";
1505 push @{$res->{$section}->{$group}}, @$rules;
1512 my ($code, @param) = @_;
1516 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
1523 sub read_local_vm_config {
1528 my $vmdata = { openvz => $openvz, qemu => $qemu };
1530 my $vmlist = PVE::Cluster::get_vmlist();
1531 return $vmdata if !$vmlist || !$vmlist->{ids};
1532 my $ids = $vmlist->{ids};
1534 foreach my $vmid (keys %$ids) {
1535 next if !$vmid; # skip VE0
1536 my $d = $ids->{$vmid};
1537 next if !$d->{node} || $d->{node} ne $nodename;
1538 next if !$d->{type};
1539 if ($d->{type} eq 'openvz') {
1540 if ($have_pve_manager) {
1541 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
1542 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1543 $openvz->{$vmid} = $conf;
1546 } elsif ($d->{type} eq 'qemu') {
1547 if ($have_qemu_server) {
1548 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
1549 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1550 $qemu->{$vmid} = $conf;
1559 sub read_vm_firewall_configs {
1561 my $vmfw_configs = {};
1563 foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
1564 my $filename = "/etc/pve
/firewall/$vmid.fw
";
1565 my $fh = IO::File->new($filename, O_RDONLY);
1568 $vmfw_configs->{$vmid} = parse_vm_fw_rules($filename, $fh);
1571 return $vmfw_configs;
1574 sub get_option_log_level {
1575 my ($options, $k) = @_;
1577 my $v = $options->{$k};
1578 $v = $default_log_level if !defined($v);
1580 return undef if $v eq '' || $v eq 'nolog';
1582 $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
1584 return $v if ($v >= 0) && ($v <= 7);
1586 warn "unknown
log level
($k = '$v')\n";
1591 sub generate_std_chains {
1592 my ($ruleset, $options) = @_;
1594 my $loglevel = get_option_log_level($options, 'smurf_log_level');
1596 # same as shorewall smurflog.
1597 my $chain = 'PVEFW-smurflog';
1599 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP
: ", $loglevel) if $loglevel;
1600 push @{$pve_std_chains->{$chain}}, "-j DROP
";
1602 # same as shorewall logflags action.
1603 $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
1604 $chain = 'PVEFW-logflags';
1605 # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
1606 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP
: ", $loglevel) if $loglevel;
1607 push @{$pve_std_chains->{$chain}}, "-j DROP
";
1609 foreach my $chain (keys %$pve_std_chains) {
1610 ruleset_create_chain($ruleset, $chain);
1611 foreach my $rule (@{$pve_std_chains->{$chain}}) {
1613 ruleset_generate_rule($ruleset, $chain, $rule);
1615 ruleset_addrule($ruleset, $chain, $rule);
1621 sub save_pvefw_status {
1624 die "unknown status
'$status' - internal error
"
1625 if $status !~ m/^(stopped|active)$/;
1627 mkdir dirname($pve_fw_status_filename);
1628 PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
1631 sub read_pvefw_status {
1633 my $status = 'unknown';
1635 return 'stopped' if ! -f $pve_fw_status_filename;
1638 $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
1645 # fixme: move to pve-common PVE::ProcFSTools
1646 sub read_proc_net_route {
1647 my $filename = "/proc/net
/route
";
1651 my $fh = IO::File->new ($filename, "r
");
1652 return $res if !$fh;
1654 my $int_to_quad = sub {
1655 return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
1658 while (defined(my $line = <$fh>)) {
1659 next if $line =~/^Iface\s+Destination/; # skip head
1660 my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
1661 push @{$res->{$iface}}, {
1662 dest => &$int_to_quad(hex($dest)),
1663 gateway => &$int_to_quad(hex($gateway)),
1664 mask => &$int_to_quad(hex($mask)),
1673 sub load_security_groups {
1675 my $groups_conf = {};
1676 my $filename = "/etc/pve
/firewall/groups
.fw
";
1677 if (my $fh = IO::File->new($filename, O_RDONLY)) {
1678 $groups_conf = parse_group_fw_rules($filename, $fh);
1681 return $groups_conf;
1685 my $vmdata = read_local_vm_config();
1686 my $vmfw_configs = read_vm_firewall_configs($vmdata);
1688 my $routing_table = read_proc_net_route();
1690 my $groups_conf = load_security_groups();
1694 ruleset_create_chain($ruleset, "PVEFW-INPUT
");
1695 ruleset_create_chain($ruleset, "PVEFW-OUTPUT
");
1697 ruleset_create_chain($ruleset, "PVEFW-FORWARD
");
1699 my $hostfw_options = {};
1700 my $hostfw_conf = {};
1702 my $filename = "/etc/pve
/local/host
.fw
";
1703 if (my $fh = IO::File->new($filename, O_RDONLY)) {
1704 $hostfw_conf = parse_host_fw_rules($filename, $fh);
1705 $hostfw_options = $hostfw_conf->{options};
1708 generate_std_chains($ruleset, $hostfw_options);
1710 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
1712 enable_host_firewall($ruleset, $hostfw_conf, $groups_conf) if $hostfw_enable;
1714 # generate firewall rules for QEMU VMs
1715 foreach my $vmid (keys %{$vmdata->{qemu}}) {
1716 my $conf = $vmdata->{qemu}->{$vmid};
1717 my $vmfw_conf = $vmfw_configs->{$vmid};
1718 next if !$vmfw_conf;
1719 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
1721 foreach my $netid (keys %$conf) {
1722 next if $netid !~ m/^net(\d+)$/;
1723 my $net = PVE::QemuServer::parse_net($conf->{$netid});
1725 my $iface = "tap
${vmid
}i
$1";
1727 my $bridge = $net->{bridge};
1728 next if !$bridge; # fixme: ?
1730 $bridge .= "v
$net->{tag
}" if $net->{tag};
1732 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
1734 my $macaddr = $net->{macaddr};
1735 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr,
1736 $vmfw_conf, $vmid, $bridge, 'IN');
1737 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr,
1738 $vmfw_conf, $vmid, $bridge, 'OUT');
1742 # generate firewall rules for OpenVZ containers
1743 foreach my $vmid (keys %{$vmdata->{openvz}}) {
1744 my $conf = $vmdata->{openvz}->{$vmid};
1746 my $vmfw_conf = $vmfw_configs->{$vmid};
1747 next if !$vmfw_conf;
1748 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
1750 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
1751 my $ip = $conf->{ip_address}->{value};
1752 generate_venet_rules_direction($ruleset, $groups_conf, $vmfw_conf, $vmid, $ip, 'IN');
1753 generate_venet_rules_direction($ruleset, $groups_conf, $vmfw_conf, $vmid, $ip, 'OUT');
1756 if ($conf->{netif} && $conf->{netif}->{value}) {
1757 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
1758 foreach my $netid (keys %$netif) {
1759 my $d = $netif->{$netid};
1760 my $bridge = $d->{bridge};
1762 warn "no bridge device
for CT
$vmid iface
'$netid'\n";
1766 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
1768 my $macaddr = $d->{mac};
1769 my $iface = $d->{host_ifname};
1770 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr,
1771 $vmfw_conf, $vmid, $bridge, 'IN');
1772 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr,
1773 $vmfw_conf, $vmid, $bridge, 'OUT');
1778 # fixme: this is an optimization? if so, we should also drop INVALID packages?
1779 ruleset_insertrule($ruleset, "PVEFW-FORWARD
", "-m conntrack
--ctstate RELATED
,ESTABLISHED
-j ACCEPT
");
1781 # fixme: what log level should we use here?
1782 my $loglevel = get_option_log_level($hostfw_options, "log_level_out
");
1784 # fixme: should we really block inter-bridge traffic?
1786 # always allow traffic from containers?
1787 ruleset_addrule($ruleset, "PVEFW-FORWARD
", "-i venet0
-j RETURN
");
1789 # disable interbridge routing
1790 ruleset_addrule($ruleset, "PVEFW-FORWARD
", "-o vmbr
+ -j PVEFW-Drop
");
1791 ruleset_addrule($ruleset, "PVEFW-FORWARD
", "-i vmbr
+ -j PVEFW-Drop
");
1792 ruleset_addlog($ruleset, "PVEFW-FORWARD
", 0, "DROP
: ", $loglevel, "-o vmbr
+");
1793 ruleset_addlog($ruleset, "PVEFW-FORWARD
", 0, "DROP
: ", $loglevel, "-i vmbr
+");
1794 ruleset_addrule($ruleset, "PVEFW-FORWARD
", "-o vmbr
+ -j DROP
");
1795 ruleset_addrule($ruleset, "PVEFW-FORWARD
", "-i vmbr
+ -j DROP
");
1797 return wantarray ? ($ruleset, $hostfw_conf) : $ruleset;
1800 sub get_ruleset_status {
1801 my ($ruleset, $verbose) = @_;
1803 my $active_chains = iptables_get_chains();
1805 my $statushash = {};
1807 foreach my $chain (sort keys %$ruleset) {
1808 my $digest = Digest::SHA->new('sha1');
1809 foreach my $cmd (@{$ruleset->{$chain}}) {
1810 $digest->add("$cmd\n");
1812 my $sig = $digest->b64digest;
1813 $statushash->{$chain}->{sig} = $sig;
1815 my $oldsig = $active_chains->{$chain};
1816 if (!defined($oldsig)) {
1817 $statushash->{$chain}->{action} = 'create';
1819 if ($oldsig eq $sig) {
1820 $statushash->{$chain}->{action} = 'exists';
1822 $statushash->{$chain}->{action} = 'update';
1825 print "$statushash->{$chain}->{action
} $chain ($sig)\n" if $verbose;
1826 foreach my $cmd (@{$ruleset->{$chain}}) {
1827 print "\t$cmd\n" if $verbose;
1831 foreach my $chain (sort keys %$active_chains) {
1832 if (!defined($ruleset->{$chain})) {
1833 my $sig = $active_chains->{$chain};
1834 $statushash->{$chain}->{action} = 'delete';
1835 $statushash->{$chain}->{sig} = $sig;
1836 print "delete $chain ($sig)\n" if $verbose;
1846 get_ruleset_status($ruleset, 1);
1849 sub print_sig_rule {
1850 my ($chain, $sig) = @_;
1852 # We just use this to store a SHA1 checksum used to detect changes
1853 return "-A
$chain -m comment
--comment
\"PVESIG
:$sig\"\n";
1856 sub get_rulset_cmdlist
{
1857 my ($ruleset, $verbose) = @_;
1859 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
1861 my $statushash = get_ruleset_status
($ruleset, $verbose);
1863 # create missing chains first
1864 foreach my $chain (sort keys %$ruleset) {
1865 my $stat = $statushash->{$chain};
1866 die "internal error" if !$stat;
1867 next if $stat->{action
} ne 'create';
1869 $cmdlist .= ":$chain - [0:0]\n";
1872 my $rule = "INPUT -j PVEFW-INPUT";
1873 if (!PVE
::Firewall
::iptables_rule_exist
($rule)) {
1874 $cmdlist .= "-A $rule\n";
1876 $rule = "OUTPUT -j PVEFW-OUTPUT";
1877 if (!PVE
::Firewall
::iptables_rule_exist
($rule)) {
1878 $cmdlist .= "-A $rule\n";
1881 $rule = "FORWARD -j PVEFW-FORWARD";
1882 if (!PVE
::Firewall
::iptables_rule_exist
($rule)) {
1883 $cmdlist .= "-A $rule\n";
1886 foreach my $chain (sort keys %$ruleset) {
1887 my $stat = $statushash->{$chain};
1888 die "internal error" if !$stat;
1890 if ($stat->{action
} eq 'update' || $stat->{action
} eq 'create') {
1891 $cmdlist .= "-F $chain\n";
1892 foreach my $cmd (@{$ruleset->{$chain}}) {
1893 $cmdlist .= "$cmd\n";
1895 $cmdlist .= print_sig_rule
($chain, $stat->{sig
});
1896 } elsif ($stat->{action
} eq 'delete') {
1897 die "internal error"; # this should not happen
1898 } elsif ($stat->{action
} eq 'exists') {
1901 die "internal error - unknown status '$stat->{action}'";
1905 foreach my $chain (keys %$statushash) {
1906 next if $statushash->{$chain}->{action
} ne 'delete';
1907 $cmdlist .= "-F $chain\n";
1909 foreach my $chain (keys %$statushash) {
1910 next if $statushash->{$chain}->{action
} ne 'delete';
1911 next if $chain eq 'PVEFW-INPUT';
1912 next if $chain eq 'PVEFW-OUTPUT';
1913 next if $chain eq 'PVEFW-FORWARD';
1914 $cmdlist .= "-X $chain\n";
1917 $cmdlist .= "COMMIT\n";
1923 my ($ruleset, $hostfw_conf, $verbose) = @_;
1925 enable_bridge_firewall
();
1927 update_nf_conntrack_max
($hostfw_conf);
1929 my $cmdlist = get_rulset_cmdlist
($ruleset, $verbose);
1931 print $cmdlist if $verbose;
1933 iptables_restore_cmdlist
($cmdlist);
1935 # test: re-read status and check if everything is up to date
1936 my $statushash = get_ruleset_status
($ruleset);
1939 foreach my $chain (sort keys %$ruleset) {
1940 my $stat = $statushash->{$chain};
1941 if ($stat->{action
} ne 'exists') {
1942 warn "unable to update chain '$chain'\n";
1947 die "unable to apply firewall changes\n" if $errors;
1950 sub update_nf_conntrack_max
{
1951 my ($hostfw_conf) = @_;
1953 my $max = 65536; # reasonable default
1955 my $options = $hostfw_conf->{options
} || {};
1957 if (defined($options->{nf_conntrack_max
}) && ($options->{nf_conntrack_max
} > $max)) {
1958 $max = $options->{nf_conntrack_max
};
1959 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
1962 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
1963 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
1965 my $current = int(PVE
::Tools
::file_read_firstline
($filename_nf_conntrack_max) || $max);
1967 if ($current != $max) {
1968 my $hashsize = int($max/4);
1969 PVE
::ProcFSTools
::write_proc_entry
($filename_hashsize, $hashsize);
1970 PVE
::ProcFSTools
::write_proc_entry
($filename_nf_conntrack_max, $max);
1975 my ($start, $verbose) = @_;
1978 my $status = read_pvefw_status
();
1980 my ($ruleset, $hostfw_conf) = PVE
::Firewall
::compile
();
1982 if ($start || $status eq 'active') {
1984 save_pvefw_status
('active') if ($status ne 'active');
1986 apply_ruleset
($ruleset, $hostfw_conf, $verbose);
1988 print "Firewall not active (status = $status)\n" if $verbose;