8 use PVE
::JSONSchema
qw(get_standard_option);
16 use PVE
::Tools
qw(run_command lock_file);
19 my $clusterfw_conf_filename = "/etc/pve/firewall/cluster.fw";
21 # dynamically include PVE::QemuServer and PVE::OpenVZ
22 # to avoid dependency problems
25 require PVE
::QemuServer
;
26 $have_qemu_server = 1;
32 $have_pve_manager = 1;
37 my $nodename = PVE
::INotify
::nodename
();
39 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
40 my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
42 my $default_log_level = 'info';
44 my $log_level_hash = {
55 # imported/converted from: /usr/share/shorewall/macro.*
58 { action
=> 'PARAM', proto
=> 'udp', dport
=> '10080' },
59 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10080' },
62 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '113' },
65 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '179' },
68 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6889' },
69 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
72 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6999' },
73 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
76 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2401' },
79 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1494' },
80 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1604' },
81 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2598' },
84 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3689' },
85 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3689' },
88 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6277' },
91 { action
=> 'PARAM', proto
=> 'udp', dport
=> '67:68', sport
=> '67:68' },
92 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '67:68', sport
=> '67:68' },
95 { action
=> 'PARAM', proto
=> 'udp', dport
=> '53' },
96 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '53' },
99 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3632' },
102 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '4662' },
103 { action
=> 'PARAM', proto
=> 'udp', dport
=> '4665' },
106 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '21' },
109 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '79' },
112 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2086' },
113 { action
=> 'PARAM', proto
=> 'udp', dport
=> '2086' },
114 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1080' },
115 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1080' },
118 { action
=> 'PARAM', proto
=> '47' },
119 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '47' },
122 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9418' },
125 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6346' },
126 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6346' },
129 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '11371' },
132 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
135 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
138 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3130' },
141 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5190' },
144 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '143' },
147 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '993' },
150 { action
=> 'PARAM', proto
=> '94' },
151 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '94' },
154 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '631' },
157 { action
=> 'PARAM', proto
=> 'udp', dport
=> '631' },
160 { action
=> 'PARAM', source
=> 'SOURCE', dest
=> 'DEST', proto
=> 'tcp', dport
=> '631' },
161 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '631' },
164 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
165 { action
=> 'PARAM', proto
=> '50' },
166 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '500', sport
=> '500' },
167 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '50' },
170 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
171 { action
=> 'PARAM', proto
=> '51' },
172 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '500', sport
=> '500' },
173 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '51' },
176 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500' },
177 { action
=> 'PARAM', proto
=> 'udp', dport
=> '4500' },
178 { action
=> 'PARAM', proto
=> '50' },
179 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '500' },
180 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '4500' },
181 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '50' },
184 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6667' },
187 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5222' },
190 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5223' },
193 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5269' },
196 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9100' },
199 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1701' },
200 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '1701' },
203 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '389' },
206 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '636' },
209 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1863' },
212 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1433' },
215 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
216 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
217 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
220 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '4949' },
223 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3306' },
226 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '119' },
229 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '563' },
232 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
235 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
236 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '123' },
239 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
240 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '123' },
243 { action
=> 'PARAM', proto
=> '89' },
246 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1194' },
249 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5632' },
250 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5631' },
253 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '110' },
256 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '995' },
259 { action
=> 'PARAM', proto
=> '47' },
260 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '47' },
261 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1723' },
264 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
267 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5432' },
270 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '515' },
273 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3389' },
276 { action
=> 'PARAM', proto
=> 'udp', dport
=> '520' },
277 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '520' },
280 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '953' },
283 { action
=> 'ACCEPT', proto
=> 'tcp', dport
=> '2703' },
286 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
289 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '873' },
292 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6566' },
295 { action
=> 'PARAM', proto
=> 'udp', dport
=> '135,445' },
296 { action
=> 'PARAM', proto
=> 'udp', dport
=> '137:139' },
297 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
298 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '135,139,445' },
301 { action
=> 'PARAM', proto
=> 'udp', dport
=> '135,445' },
302 { action
=> 'PARAM', proto
=> 'udp', dport
=> '137:139' },
303 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
304 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '135,139,445' },
305 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '135,445' },
306 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '137:139' },
307 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
308 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'tcp', dport
=> '135,139,445' },
311 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '901' },
314 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
317 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
320 { action
=> 'PARAM', proto
=> 'udp', dport
=> '161:162' },
321 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '161' },
324 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '783' },
327 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '22' },
330 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3690' },
333 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3874' },
334 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3740' },
335 { action
=> 'PARAM', proto
=> '41' },
336 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5072,8374' },
339 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3128' },
342 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
345 { action
=> 'PARAM', proto
=> 'udp', dport
=> '514' },
346 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '514' },
349 { action
=> 'PARAM', proto
=> 'udp', dport
=> '69' },
352 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '23' },
355 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '992' },
358 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
361 { action
=> 'PARAM', proto
=> 'udp', dport
=> '33434:33524' },
362 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
365 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5900:5909' },
368 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5500' },
371 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
372 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
375 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '8080' },
378 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10000' },
381 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '43' },
385 my $pve_fw_parsed_macros;
386 my $pve_fw_preferred_macro_names = {};
388 my $pve_std_chains = {
389 'PVEFW-SET-ACCEPT-MARK' => [
390 "-j MARK --set-mark 1",
392 'PVEFW-DropBroadcast' => [
393 # same as shorewall 'Broadcast'
394 # simply DROP BROADCAST/MULTICAST/ANYCAST
395 # we can use this to reduce logging
396 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
397 { action
=> 'DROP', dsttype
=> 'MULTICAST' },
398 { action
=> 'DROP', dsttype
=> 'ANYCAST' },
399 { action
=> 'DROP', dest
=> '224.0.0.0/4' },
402 # same as shorewall 'reject'
403 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
404 { action
=> 'DROP', source
=> '224.0.0.0/4' },
405 { action
=> 'DROP', proto
=> 'icmp' },
406 "-p tcp -j REJECT --reject-with tcp-reset",
407 "-p udp -j REJECT --reject-with icmp-port-unreachable",
408 "-p icmp -j REJECT --reject-with icmp-host-unreachable",
409 "-j REJECT --reject-with icmp-host-prohibited",
412 # same as shorewall 'Drop', which is equal to DROP,
413 # but REJECT/DROP some packages to reduce logging,
414 # and ACCEPT critical ICMP types
415 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
416 # we are not interested in BROADCAST/MULTICAST/ANYCAST
417 { action
=> 'PVEFW-DropBroadcast' },
418 # ACCEPT critical ICMP types
419 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
420 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
421 # Drop packets with INVALID state
422 "-m conntrack --ctstate INVALID -j DROP",
423 # Drop Microsoft SMB noise
424 { action
=> 'DROP', proto
=> 'udp', dport
=> '135,445', nbdport
=> 2 },
425 { action
=> 'DROP', proto
=> 'udp', dport
=> '137:139'},
426 { action
=> 'DROP', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
427 { action
=> 'DROP', proto
=> 'tcp', dport
=> '135,139,445', nbdport
=> 3 },
428 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
429 # Drop new/NotSyn traffic so that it doesn't get logged
430 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
432 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
435 # same as shorewall 'Reject', which is equal to Reject,
436 # but REJECT/DROP some packages to reduce logging,
437 # and ACCEPT critical ICMP types
438 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
439 # we are not interested in BROADCAST/MULTICAST/ANYCAST
440 { action
=> 'PVEFW-DropBroadcast' },
441 # ACCEPT critical ICMP types
442 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
443 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
444 # Drop packets with INVALID state
445 "-m conntrack --ctstate INVALID -j DROP",
446 # Drop Microsoft SMB noise
447 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '135,445', nbdport
=> 2 },
448 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '137:139'},
449 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
450 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '135,139,445', nbdport
=> 3 },
451 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
452 # Drop new/NotSyn traffic so that it doesn't get logged
453 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
455 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
457 'PVEFW-tcpflags' => [
458 # same as shorewall tcpflags action.
459 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
460 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
461 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
462 "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
463 "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
464 "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
467 # same as shorewall smurfs action
468 # Filter packets for smurfs (packets with a broadcast address as the source).
469 "-s 0.0.0.0/32 -j RETURN",
470 "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
471 "-s 224.0.0.0/4 -g PVEFW-smurflog",
475 # iptables -p icmp -h
476 my $icmp_type_names = {
479 'destination-unreachable' => 1,
480 'network-unreachable' => 1,
481 'host-unreachable' => 1,
482 'protocol-unreachable' => 1,
483 'port-unreachable' => 1,
484 'fragmentation-needed' => 1,
485 'source-route-failed' => 1,
486 'network-unknown' => 1,
488 'network-prohibited' => 1,
489 'host-prohibited' => 1,
490 'TOS-network-unreachable' => 1,
491 'TOS-host-unreachable' => 1,
492 'communication-prohibited' => 1,
493 'host-precedence-violation' => 1,
494 'precedence-cutoff' => 1,
495 'source-quench' => 1,
497 'network-redirect' => 1,
498 'host-redirect' => 1,
499 'TOS-network-redirect' => 1,
500 'TOS-host-redirect' => 1,
502 'router-advertisement' => 1,
503 'router-solicitation' => 1,
504 'time-exceeded' => 1,
505 'ttl-zero-during-transit' => 1,
506 'ttl-zero-during-reassembly' => 1,
507 'parameter-problem' => 1,
508 'ip-header-bad' => 1,
509 'required-option-missing' => 1,
510 'timestamp-request' => 1,
511 'timestamp-reply' => 1,
512 'address-mask-request' => 1,
513 'address-mask-reply' => 1,
516 sub init_firewall_macros
{
518 $pve_fw_parsed_macros = {};
520 foreach my $k (keys %$pve_fw_macros) {
521 my $lc_name = lc($k);
522 my $macro = $pve_fw_macros->{$k};
523 $pve_fw_preferred_macro_names->{$lc_name} = $k;
524 $pve_fw_parsed_macros->{$k} = $macro;
528 init_firewall_macros
();
532 sub get_etc_services
{
534 return $etc_services if $etc_services;
536 my $filename = "/etc/services";
538 my $fh = IO
::File-
>new($filename, O_RDONLY
);
540 warn "unable to read '$filename' - $!\n";
546 while (my $line = <$fh>) {
548 next if $line =~m/^#/;
549 next if ($line =~m/^\s*$/);
551 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
552 $services->{byid
}->{$2}->{name
} = $1;
553 $services->{byid
}->{$2}->{port
} = $2;
554 $services->{byid
}->{$2}->{$3} = 1;
555 $services->{byname
}->{$1} = $services->{byid
}->{$2};
561 $etc_services = $services;
564 return $etc_services;
569 sub get_etc_protocols
{
570 return $etc_protocols if $etc_protocols;
572 my $filename = "/etc/protocols";
574 my $fh = IO
::File-
>new($filename, O_RDONLY
);
576 warn "unable to read '$filename' - $!\n";
582 while (my $line = <$fh>) {
584 next if $line =~m/^#/;
585 next if ($line =~m/^\s*$/);
587 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
588 $protocols->{byid
}->{$2}->{name
} = $1;
589 $protocols->{byname
}->{$1} = $protocols->{byid
}->{$2};
595 $etc_protocols = $protocols;
597 return $etc_protocols;
600 sub parse_address_list
{
604 foreach my $aor (split(/,/, $str)) {
605 if (!Net
::IP-
>new($aor)) {
606 my $err = Net
::IP
::Error
();
607 die "invalid IP address: $err\n";
615 sub parse_port_name_number_or_range
{
618 my $services = PVE
::Firewall
::get_etc_services
();
620 foreach my $item (split(/,/, $str)) {
624 foreach my $pon (split(':', $item, 2)) {
625 $pon = $services->{byname
}->{$pon}->{port
} if $services->{byname
}->{$pon}->{port
};
626 if ($pon =~ m/^\d+$/){
627 die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535;
628 die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon);
631 die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname
}->{$pon};
639 PVE
::JSONSchema
::register_format
('pve-fw-port-spec', \
&pve_fw_verify_port_spec
);
640 sub pve_fw_verify_port_spec
{
643 parse_port_name_number_or_range
($portstr);
648 PVE
::JSONSchema
::register_format
('pve-fw-v4addr-spec', \
&pve_fw_verify_v4addr_spec
);
649 sub pve_fw_verify_v4addr_spec
{
652 parse_address_list
($list);
657 PVE
::JSONSchema
::register_format
('pve-fw-protocol-spec', \
&pve_fw_verify_protocol_spec
);
658 sub pve_fw_verify_protocol_spec
{
661 my $protocols = get_etc_protocols
();
663 die "unknown protocol '$proto'\n" if $proto &&
664 !(defined($protocols->{byname
}->{$proto}) ||
665 defined($protocols->{byid
}->{$proto}));
671 # helper function for API
673 my $rule_properties = {
675 description
=> "Update rule at position <pos>.",
689 enum
=> ['in', 'out', 'group'],
694 enum
=> ['ACCEPT', 'DROP', 'REJECT'],
701 iface
=> get_standard_option
('pve-iface', { optional
=> 1 }),
703 type
=> 'string', format
=> 'pve-fw-v4addr-spec',
707 type
=> 'string', format
=> 'pve-fw-v4addr-spec',
711 type
=> 'string', format
=> 'pve-fw-protocol-spec',
719 type
=> 'string', format
=> 'pve-fw-port-spec',
723 type
=> 'string', format
=> 'pve-fw-port-spec',
732 sub cleanup_fw_rule
{
733 my ($rule, $digest, $pos) = @_;
737 foreach my $k (keys %$rule) {
738 next if !$rule_properties->{$k};
740 next if !defined($v);
742 $r->{digest
} = $digest;
749 sub add_rule_properties
{
750 my ($properties) = @_;
752 foreach my $k (keys %$rule_properties) {
753 $properties->{$k} = $rule_properties->{$k};
760 my ($rule, $param) = @_;
762 foreach my $k (keys %$rule_properties) {
763 if (defined(my $v = $param->{$k})) {
764 if ($v eq '' || $v eq '-') {
777 my $bridge_firewall_enabled = 0;
779 sub enable_bridge_firewall
{
781 return if $bridge_firewall_enabled; # only once
783 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
784 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
786 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
787 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/ipv4/tcp_syncookies", "1");
789 $bridge_firewall_enabled = 1;
792 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
797 run_command
("/sbin/iptables $cmd", outfunc
=> sub {}, errfunc
=> sub {});
800 sub iptables_restore_cmdlist
{
803 run_command
("/sbin/iptables-restore -n", input
=> $cmdlist);
806 sub ipset_restore_cmdlist
{
809 run_command
(" /usr/sbin/ipset restore", input
=> $cmdlist);
812 sub iptables_get_chains
{
816 # check what chains we want to track
817 my $is_pvefw_chain = sub {
820 return 1 if $name =~ m/^PVEFW-\S+$/;
822 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
824 return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
826 return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
828 return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT|IPS)$/;
829 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
841 return if $line =~ m/^#/;
842 return if $line =~ m/^\s*$/;
844 if ($line =~ m/^\*(\S+)$/) {
849 return if $table ne 'filter';
851 if ($line =~ m/^:(\S+)\s/) {
853 return if !&$is_pvefw_chain($chain);
854 $res->{$chain} = "unknown";
855 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
856 my ($chain, $sig) = ($1, $2);
857 return if !&$is_pvefw_chain($chain);
858 $res->{$chain} = $sig;
859 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
862 # simply ignore the rest
867 run_command
("/sbin/iptables-save", outfunc
=> $parser);
869 return wantarray ?
($res, $hooks) : $res;
872 sub iptables_chain_digest
{
874 my $digest = Digest
::SHA-
>new('sha1');
875 foreach my $rule (@$rules) { # order is important
878 return $digest->b64digest;
881 sub ipset_chain_digest
{
884 my $digest = Digest
::SHA-
>new('sha1');
885 foreach my $rule (sort @$rules) { # note: sorted
888 return $digest->b64digest;
891 sub ipset_get_chains
{
899 return if $line =~ m/^#/;
900 return if $line =~ m/^\s*$/;
901 if ($line =~ m/^(\S+)\s(\S+)\s(\S+)/) {
902 push @{$chains->{$2}}, $line;
904 # simply ignore the rest
909 run_command
("/usr/sbin/ipset save", outfunc
=> $parser);
911 # compute digest for each chain
912 foreach my $chain (keys %$chains) {
913 $res->{$chain} = ipset_chain_digest
($chains->{$chain});
919 sub iptables_chain_exist
{
923 iptables
("-n --list $chain");
930 sub iptables_rule_exist
{
934 iptables
("-C $rule");
941 sub ruleset_generate_cmdstr
{
942 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
944 return if defined($rule->{enable
}) && !$rule->{enable
};
946 die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
948 my $nbdport = defined($rule->{dport
}) ? parse_port_name_number_or_range
($rule->{dport
}) : 0;
949 my $nbsport = defined($rule->{sport
}) ? parse_port_name_number_or_range
($rule->{sport
}) : 0;
950 my $nbsource = $rule->{source
} ? parse_address_list
( $rule->{source
}) : 0;
951 my $nbdest = $rule->{dest
} ? parse_address_list
($rule->{dest
}) : 0;
955 push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in
};
956 push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out
};
958 push @cmd, "-m iprange --src-range" if $nbsource > 1;
959 push @cmd, "-s $rule->{source}" if $rule->{source
};
960 push @cmd, "-m iprange --dst-range" if $nbdest > 1;
961 push @cmd, "-d $rule->{dest}" if $rule->{dest
};
963 if ($rule->{proto
}) {
964 push @cmd, "-p $rule->{proto}";
967 $multiport++ if $nbdport > 1;
968 $multiport++ if $nbsport > 1;
970 push @cmd, "--match multiport" if $multiport;
972 die "multiport: option '--sports' cannot be used together with '--dports'\n"
973 if ($multiport == 2) && ($rule->{dport
} ne $rule->{sport
});
975 if ($rule->{dport
}) {
976 if ($rule->{proto
} && $rule->{proto
} eq 'icmp') {
977 # Note: we use dport to store --icmp-type
978 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport
}});
979 push @cmd, "-m icmp --icmp-type $rule->{dport}";
982 if ($multiport == 2) {
983 push @cmd, "--ports $rule->{dport}";
985 push @cmd, "--dports $rule->{dport}";
988 push @cmd, "--dport $rule->{dport}";
993 if ($rule->{sport
}) {
995 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
997 push @cmd, "--sport $rule->{sport}";
1000 } elsif ($rule->{dport
} || $rule->{sport
}) {
1001 warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport
};
1002 warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport
};
1005 push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype
};
1007 if (my $action = $rule->{action
}) {
1008 $action = $actions->{$action} if defined($actions->{$action});
1009 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1010 push @cmd, $goto ?
"-g $action" : "-j $action";
1013 return scalar(@cmd) ?
join(' ', @cmd) : undef;
1016 my $apply_macro = sub {
1017 my ($macro_name, $param) = @_;
1019 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1020 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1024 foreach my $templ (@$macro_rules) {
1026 my $param_used = {};
1027 foreach my $k (keys %$templ) {
1028 my $v = $templ->{$k};
1029 if ($v eq 'PARAM') {
1031 $param_used->{$k} = 1;
1032 } elsif ($v eq 'DEST') {
1033 $v = $param->{dest
};
1034 $param_used->{dest
} = 1;
1035 } elsif ($v eq 'SOURCE') {
1036 $v = $param->{source
};
1037 $param_used->{source
} = 1;
1040 die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
1043 foreach my $k (keys %$param) {
1044 next if $k eq 'macro';
1045 next if !defined($param->{$k});
1046 next if $param_used->{$k};
1047 if (defined($rule->{$k})) {
1048 die "parameter '$k' already define in macro (value = '$rule->{$k}')\n"
1049 if $rule->{$k} ne $param->{$k};
1051 $rule->{$k} = $param->{$k};
1054 push @$rules, $rule;
1060 sub ruleset_generate_rule
{
1061 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1065 if ($rule->{macro}) {
1066 $rules = &$apply_macro($rule->{macro}, $rule);
1071 foreach my $tmp (@$rules) {
1072 if (my $cmdstr = ruleset_generate_cmdstr
($ruleset, $chain, $tmp, $actions, $goto)) {
1073 ruleset_addrule
($ruleset, $chain, $cmdstr);
1078 sub ruleset_generate_rule_insert
{
1079 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1081 die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1083 if (my $cmdstr = ruleset_generate_cmdstr
($ruleset, $chain, $rule, $actions, $goto)) {
1084 ruleset_insertrule
($ruleset, $chain, $cmdstr);
1088 sub ruleset_create_chain
{
1089 my ($ruleset, $chain) = @_;
1091 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1092 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1094 die "chain '$chain' already exists\n" if $ruleset->{$chain};
1096 $ruleset->{$chain} = [];
1099 sub ruleset_chain_exist
{
1100 my ($ruleset, $chain) = @_;
1102 return $ruleset->{$chain} ?
1 : undef;
1105 sub ruleset_addrule
{
1106 my ($ruleset, $chain, $rule) = @_;
1108 die "no such chain '$chain'\n" if !$ruleset->{$chain};
1110 push @{$ruleset->{$chain}}, "-A $chain $rule";
1113 sub ruleset_insertrule
{
1114 my ($ruleset, $chain, $rule) = @_;
1116 die "no such chain '$chain'\n" if !$ruleset->{$chain};
1118 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1121 sub get_log_rule_base
{
1122 my ($chain, $vmid, $msg, $loglevel) = @_;
1124 die "internal error - no log level" if !defined($loglevel);
1126 $vmid = 0 if !defined($vmid);
1128 # Note: we use special format for prefix to pass further
1129 # info to log daemon (VMID, LOGVELEL and CHAIN)
1131 return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1134 sub ruleset_addlog {
1135 my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1137 return if !defined($loglevel);
1139 my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1141 $logrule = "$rule $logrule" if defined($rule);
1143 ruleset_addrule($ruleset, $chain, $logrule)
1146 sub generate_bridge_chains {
1147 my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_;
1149 my $options = $hostfw_conf->{options} || {};
1151 die "error
: detected direct route to bridge
'$bridge'\n"
1152 if !$options->{allow_bridge_route} && $routing_table->{$bridge};
1154 if (!ruleset_chain_exist($ruleset, "$bridge-FW
")) {
1155 ruleset_create_chain($ruleset, "$bridge-FW
");
1156 ruleset_addrule($ruleset, "PVEFW-FORWARD
", "-o
$bridge -m physdev
--physdev-is-out
-j
$bridge-FW
");
1157 ruleset_addrule($ruleset, "PVEFW-FORWARD
", "-i
$bridge -m physdev
--physdev-is-in
-j
$bridge-FW
");
1160 if (!ruleset_chain_exist($ruleset, "$bridge-OUT
")) {
1161 ruleset_create_chain($ruleset, "$bridge-OUT
");
1162 ruleset_addrule($ruleset, "$bridge-FW
", "-m physdev
--physdev-is-in
-j
$bridge-OUT
");
1163 ruleset_insertrule($ruleset, "PVEFW-INPUT
", "-i
$bridge -m physdev
--physdev-is-in
-j
$bridge-OUT
");
1166 if (!ruleset_chain_exist($ruleset, "$bridge-IN
")) {
1167 ruleset_create_chain($ruleset, "$bridge-IN
");
1168 ruleset_addrule($ruleset, "$bridge-FW
", "-m physdev
--physdev-is-out
-j
$bridge-IN
");
1169 ruleset_addrule($ruleset, "$bridge-FW
", "-m mark
--mark
1 -j ACCEPT
");
1170 # accept traffic to unmanaged bridge ports
1171 ruleset_addrule($ruleset, "$bridge-FW
", "-m physdev
--physdev-is-out
-j ACCEPT
");
1175 sub ruleset_add_chain_policy {
1176 my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1178 if ($policy eq 'ACCEPT') {
1180 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1181 { ACCEPT => $accept_action});
1183 } elsif ($policy eq 'DROP') {
1185 ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop
");
1187 ruleset_addlog($ruleset, $chain, $vmid, "policy
$policy: ", $loglevel);
1189 ruleset_addrule($ruleset, $chain, "-j DROP
");
1190 } elsif ($policy eq 'REJECT') {
1191 ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject
");
1193 ruleset_addlog($ruleset, $chain, $vmid, "policy
$policy: ", $loglevel);
1195 ruleset_addrule($ruleset, $chain, "-g PVEFW-reject
");
1198 die "internal error
: unknown policy
'$policy'";
1202 sub ruleset_create_vm_chain {
1203 my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
1205 ruleset_create_chain($ruleset, $chain);
1206 my $accept = generate_nfqueue($options);
1208 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1209 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
,NEW
-j PVEFW-smurfs
");
1212 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1213 if ($direction eq 'OUT') {
1214 ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1215 proto => 'udp', sport => 68, dport => 67 });
1217 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1218 proto => 'udp', sport => 67, dport => 68 });
1222 if ($options->{tcpflags}) {
1223 ruleset_addrule($ruleset, $chain, "-p tcp
-j PVEFW-tcpflags
");
1226 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
-j DROP
");
1227 if($direction eq 'OUT'){
1228 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
-g PVEFW-SET-ACCEPT-MARK
");
1231 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
-j
$accept");
1233 if ($direction eq 'OUT') {
1234 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1235 ruleset_addrule($ruleset, $chain, "-m mac
! --mac-source
$macaddr -j DROP
");
1237 ruleset_addrule($ruleset, $chain, "-j MARK
--set-mark
0"); # clear mark
1243 sub ruleset_generate_vm_rules {
1244 my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
1246 my $lc_direction = lc($direction);
1248 foreach my $rule (@$rules) {
1249 next if $rule->{iface} && $rule->{iface} ne $netid;
1250 next if !$rule->{enable};
1251 if ($rule->{type} eq 'group') {
1252 my $group_chain = "GROUP-
$rule->{action
}-$direction";
1253 if(!ruleset_chain_exist($ruleset, $group_chain)){
1254 generate_group_rules($ruleset, $cluster_conf, $rule->{action});
1256 ruleset_addrule($ruleset, $chain, "-j
$group_chain");
1257 if ($direction eq 'OUT'){
1258 ruleset_addrule($ruleset, $chain, "-m mark
--mark
1 -j RETURN
");
1260 my $accept = generate_nfqueue($options);
1261 ruleset_addrule($ruleset, $chain, "-m mark
--mark
1 -j
$accept");
1265 next if $rule->{type} ne $lc_direction;
1266 if ($direction eq 'OUT') {
1267 ruleset_generate_rule($ruleset, $chain, $rule,
1268 { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" });
1270 my $accept = generate_nfqueue($options);
1271 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept , REJECT => "PVEFW-reject
" });
1277 sub generate_nfqueue {
1281 if($options->{ips}){
1282 $action = "NFQUEUE
";
1283 if($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1284 if(defined($3) && defined($1)) {
1285 $action .= " --queue-balance
$1:$3";
1286 }elsif (defined($1)) {
1287 $action .= " --queue-num
$1";
1290 $action .= " --queue-bypass
";
1298 sub ruleset_generate_vm_ipsrules {
1299 my ($ruleset, $options, $direction, $iface, $bridge) = @_;
1301 if ($options->{ips} && $direction eq 'IN') {
1302 my $nfqueue = generate_nfqueue($options);
1304 if (!ruleset_chain_exist($ruleset, "$bridge-IPS
")) {
1305 ruleset_create_chain($ruleset, "PVEFW-IPS
");
1308 if (!ruleset_chain_exist($ruleset, "$bridge-IPS
")) {
1309 ruleset_create_chain($ruleset, "$bridge-IPS
");
1310 ruleset_insertrule($ruleset, "PVEFW-IPS
", "-o
$bridge -m physdev
--physdev-is-out
-j
$bridge-IPS
");
1313 ruleset_addrule($ruleset, "$bridge-IPS
", "-m physdev
--physdev-out
$iface --physdev-is-bridged
-j
$nfqueue");
1317 sub generate_venet_rules_direction {
1318 my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1320 parse_address_list($ip); # make sure we have a valid $ip list
1322 my $lc_direction = lc($direction);
1324 my $rules = $vmfw_conf->{rules};
1326 my $options = $vmfw_conf->{options};
1327 my $loglevel = get_option_log_level($options, "log_level_
${lc_direction
}");
1329 my $chain = "venet0-
$vmid-$direction";
1331 ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1333 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
1338 if ($direction eq 'OUT') {
1339 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1341 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1344 my $accept = generate_nfqueue($options);
1345 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : $accept;
1346 ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1348 # plug into FORWARD, INPUT and OUTPUT chain
1349 if ($direction eq 'OUT') {
1350 ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD
", {
1353 iface_in => 'venet0'});
1355 ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT
", {
1358 iface_in => 'venet0'});
1360 ruleset_generate_rule($ruleset, "PVEFW-FORWARD
", {
1363 iface_out => 'venet0'});
1365 ruleset_generate_rule($ruleset, "PVEFW-OUTPUT
", {
1368 iface_out => 'venet0'});
1372 sub generate_tap_rules_direction {
1373 my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_;
1375 my $lc_direction = lc($direction);
1377 my $rules = $vmfw_conf->{rules};
1379 my $options = $vmfw_conf->{options};
1380 my $loglevel = get_option_log_level($options, "log_level_
${lc_direction
}");
1382 my $tapchain = "$iface-$direction";
1384 ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1386 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
1388 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface, $bridge);
1393 if ($direction eq 'OUT') {
1394 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1396 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1399 my $accept = generate_nfqueue($options);
1400 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : $accept;
1401 ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1403 # plug the tap chain to bridge chain
1404 if ($direction eq 'IN') {
1405 ruleset_insertrule($ruleset, "$bridge-IN
",
1406 "-m physdev
--physdev-is-bridged
--physdev-out
$iface -j
$tapchain");
1408 ruleset_insertrule($ruleset, "$bridge-OUT
",
1409 "-m physdev
--physdev-in
$iface -j
$tapchain");
1413 sub enable_host_firewall {
1414 my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1416 # fixme: allow security groups
1418 my $options = $hostfw_conf->{options};
1419 my $rules = $hostfw_conf->{rules};
1421 # host inbound firewall
1422 my $chain = "PVEFW-HOST-IN
";
1423 ruleset_create_chain($ruleset, $chain);
1425 my $loglevel = get_option_log_level($options, "log_level_in
");
1427 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1428 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
,NEW
-j PVEFW-smurfs
");
1431 if ($options->{tcpflags}) {
1432 ruleset_addrule($ruleset, $chain, "-p tcp
-j PVEFW-tcpflags
");
1435 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
-j DROP
");
1436 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
-j ACCEPT
");
1437 ruleset_addrule($ruleset, $chain, "-i lo
-j ACCEPT
");
1438 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
-j ACCEPT
");
1439 ruleset_addrule($ruleset, $chain, "-p udp
-m conntrack
--ctstate NEW
--dport
5404:5405 -j ACCEPT
");
1440 ruleset_addrule($ruleset, $chain, "-p udp
-m udp
--dport
9000 -j ACCEPT
"); #corosync
1442 # we use RETURN because we need to check also tap rules
1443 my $accept_action = 'RETURN';
1445 foreach my $rule (@$rules) {
1446 next if $rule->{type} ne 'in';
1447 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" });
1450 # implement input policy
1451 my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1452 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1454 # host outbound firewall
1455 $chain = "PVEFW-HOST-OUT
";
1456 ruleset_create_chain($ruleset, $chain);
1458 $loglevel = get_option_log_level($options, "log_level_out
");
1460 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
-j DROP
");
1461 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
-j ACCEPT
");
1462 ruleset_addrule($ruleset, $chain, "-o lo
-j ACCEPT
");
1463 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
-j ACCEPT
");
1464 ruleset_addrule($ruleset, $chain, "-p udp
-m conntrack
--ctstate NEW
--dport
5404:5405 -j ACCEPT
");
1465 ruleset_addrule($ruleset, $chain, "-p udp
-m udp
--dport
9000 -j ACCEPT
"); #corosync
1467 # we use RETURN because we may want to check other thigs later
1468 $accept_action = 'RETURN';
1470 foreach my $rule (@$rules) {
1471 next if $rule->{type} ne 'out';
1472 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" });
1475 # implement output policy
1476 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1477 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1479 ruleset_addrule($ruleset, "PVEFW-OUTPUT
", "-j PVEFW-HOST-OUT
");
1480 ruleset_addrule($ruleset, "PVEFW-INPUT
", "-j PVEFW-HOST-IN
");
1483 sub generate_group_rules {
1484 my ($ruleset, $cluster_conf, $group) = @_;
1485 die "no such security group
'$group'\n" if !$cluster_conf->{groups}->{$group};
1487 my $rules = $cluster_conf->{groups}->{$group};
1489 my $chain = "GROUP-
${group
}-IN
";
1491 ruleset_create_chain($ruleset, $chain);
1492 ruleset_addrule($ruleset, $chain, "-j MARK
--set-mark
0"); # clear mark
1494 foreach my $rule (@$rules) {
1495 next if $rule->{type} ne 'in';
1496 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" });
1499 $chain = "GROUP-
${group
}-OUT
";
1501 ruleset_create_chain($ruleset, $chain);
1502 ruleset_addrule($ruleset, $chain, "-j MARK
--set-mark
0"); # clear mark
1504 foreach my $rule (@$rules) {
1505 next if $rule->{type} ne 'out';
1506 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1507 # check also other tap rules later
1508 ruleset_generate_rule($ruleset, $chain, $rule,
1509 { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject
" });
1514 my $valid_netdev_names = {};
1515 for (my $i = 0; $i < $MAX_NETS; $i++) {
1516 $valid_netdev_names->{"net
$i"} = 1;
1520 my ($line, $need_iface, $allow_groups) = @_;
1522 my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
1524 # we can add single line comments to the end of the rule
1525 my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
1527 # we can disable a rule when prefixed with '|'
1530 $enable = 0 if $line =~ s/^\|//;
1532 my @data = split(/\s+/, $line);
1533 my $expected_elements = $need_iface ? 8 : 7;
1535 die "wrong number of rule elements
\n" if scalar(@data) > $expected_elements;
1538 ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
1540 ($type, $action, $source, $dest, $proto, $dport, $sport) = @data;
1543 die "incomplete rule
\n" if ! ($type && $action);
1549 if ($type eq 'in' || $type eq 'out') {
1550 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1552 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1554 my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1555 die "unknown
macro '$1'\n" if !$preferred_name;
1556 $macro = $preferred_name;
1558 die "unknown action
'$action'\n";
1560 } elsif ($type eq 'group') {
1561 die "wrong number of rule elements
\n" if scalar(@data) != 3;
1562 die "groups disabled
\n" if !$allow_groups;
1564 die "invalid characters
in group name
\n" if $action !~ m/^[A-Za-z0-9_\-]+$/;
1566 die "unknown rule type
'$type'\n";
1570 $iface = undef if $iface && $iface eq '-';
1573 $proto = undef if $proto && $proto eq '-';
1574 pve_fw_verify_protocol_spec($proto) if $proto;
1576 $source = undef if $source && $source eq '-';
1577 $dest = undef if $dest && $dest eq '-';
1579 $dport = undef if $dport && $dport eq '-';
1580 $sport = undef if $sport && $sport eq '-';
1582 parse_port_name_number_or_range($dport) if defined($dport);
1583 parse_port_name_number_or_range($sport) if defined($sport);
1585 parse_address_list($source) if $source;
1586 parse_address_list($dest) if $dest;
1591 comment => $comment,
1603 sub parse_vmfw_option {
1608 my $loglevels = "emerg
|alert
|crit
|err
|warning
|notice
|info
|debug
|nolog
";
1610 if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags|ips):\s*(0|1)\s*$/i) {
1613 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1615 $value = $2 ? lc($3) : '';
1616 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1619 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1624 die "can
't parse option '$line'\n"
1627 return ($opt, $value);
1630 sub parse_hostfw_option {
1635 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1637 if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags|allow_bridge_route|optimize):\s*(0|1)\s*$/i) {
1640 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1642 $value = $2 ? lc($3) : '';
1643 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1646 } elsif ($line =~ m/^(nf_conntrack_max):\s*(\d+)\s*$/i) {
1651 die "can't parse option
'$line'\n"
1654 return ($opt, $value);
1657 sub parse_clusterfw_option {
1662 if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1667 die "can
't parse option '$line'\n"
1670 return ($opt, $value);
1673 sub parse_vm_fw_rules {
1674 my ($filename, $fh) = @_;
1676 my $res = { rules => [], options => {}};
1680 my $digest = Digest::SHA->new('sha1
');
1682 while (defined(my $line = <$fh>)) {
1683 $digest->add($line);
1685 next if $line =~ m/^#/;
1686 next if $line =~ m/^\s*$/;
1688 my $linenr = $fh->input_line_number();
1689 my $prefix = "$filename (line $linenr)";
1691 if ($line =~ m/^\[(\S+)\]\s*$/i) {
1693 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1697 warn "$prefix: skip line - no section";
1701 next if !$res->{$section}; # skip undefined section
1703 if ($section eq 'options
') {
1705 my ($opt, $value) = parse_vmfw_option($line);
1706 $res->{options}->{$opt} = $value;
1708 warn "$prefix: $@" if $@;
1713 eval { $rule = parse_fw_rule($line, 1, 1); };
1715 warn "$prefix: $err";
1719 push @{$res->{$section}}, $rule;
1722 $res->{digest} = $digest->b64digest;
1727 sub parse_host_fw_rules {
1728 my ($filename, $fh) = @_;
1730 my $res = { rules => [], options => {}};
1734 my $digest = Digest::SHA->new('sha1
');
1736 while (defined(my $line = <$fh>)) {
1737 $digest->add($line);
1739 next if $line =~ m/^#/;
1740 next if $line =~ m/^\s*$/;
1742 my $linenr = $fh->input_line_number();
1743 my $prefix = "$filename (line $linenr)";
1745 if ($line =~ m/^\[(\S+)\]\s*$/i) {
1747 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1751 warn "$prefix: skip line - no section";
1755 next if !$res->{$section}; # skip undefined section
1757 if ($section eq 'options
') {
1759 my ($opt, $value) = parse_hostfw_option($line);
1760 $res->{options}->{$opt} = $value;
1762 warn "$prefix: $@" if $@;
1767 eval { $rule = parse_fw_rule($line, 1, 1); };
1769 warn "$prefix: $err";
1773 push @{$res->{$section}}, $rule;
1776 $res->{digest} = $digest->b64digest;
1781 sub parse_cluster_fw_rules {
1782 my ($filename, $fh) = @_;
1787 my $res = { rules => [], options => {}, groups => {}, ipset => {} };
1789 my $digest = Digest::SHA->new('sha1
');
1791 while (defined(my $line = <$fh>)) {
1792 $digest->add($line);
1794 next if $line =~ m/^#/;
1795 next if $line =~ m/^\s*$/;
1797 my $linenr = $fh->input_line_number();
1798 my $prefix = "$filename (line $linenr)";
1800 if ($line =~ m/^\[options\]$/i) {
1801 $section = 'options
';
1805 if ($line =~ m/^\[group\s+(\S+)\]\s*$/i) {
1806 $section = 'groups
';
1811 if ($line =~ m/^\[rules\]$/i) {
1816 if ($line =~ m/^\[ipgroup\s+(\S+)\]\s*$/i) {
1819 $res->{$section}->{$group}->{type} = 'hash
:ip family inet hashsize
1024 maxelem
65536 ';
1823 if ($line =~ m/^\[netgroup\s+(\S+)\]\s*$/i) {
1826 $res->{$section}->{$group}->{type} = 'hash
:net family inet hashsize
1024 maxelem
65536 ';
1831 warn "$prefix: skip line - no section";
1835 if ($section eq 'options
') {
1837 my ($opt, $value) = parse_clusterfw_option($line);
1838 $res->{options}->{$opt} = $value;
1840 warn "$prefix: $@" if $@;
1841 } elsif ($section eq 'rules
') {
1843 eval { $rule = parse_fw_rule($line, 1, 1); };
1845 warn "$prefix: $err";
1848 push @{$res->{$section}}, $rule;
1849 } elsif ($section eq 'groups
') {
1851 eval { $rule = parse_fw_rule($line, 0, 0); };
1853 warn "$prefix: $err";
1856 push @{$res->{$section}->{$group}}, $rule;
1857 } elsif ($section eq 'ipset
') {
1860 if (!Net::IP->new($line)) {
1861 warn "$prefix: $line is not an valid ip address";
1864 push @{$res->{$section}->{$group}->{ip}}, $line;
1868 $res->{digest} = $digest->b64digest;
1874 my ($code, @param) = @_;
1878 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
1885 sub read_local_vm_config {
1890 my $vmdata = { openvz => $openvz, qemu => $qemu };
1892 my $vmlist = PVE::Cluster::get_vmlist();
1893 return $vmdata if !$vmlist || !$vmlist->{ids};
1894 my $ids = $vmlist->{ids};
1896 foreach my $vmid (keys %$ids) {
1897 next if !$vmid; # skip VE0
1898 my $d = $ids->{$vmid};
1899 next if !$d->{node} || $d->{node} ne $nodename;
1900 next if !$d->{type};
1901 if ($d->{type} eq 'openvz
') {
1902 if ($have_pve_manager) {
1903 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
1904 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1905 $openvz->{$vmid} = $conf;
1908 } elsif ($d->{type} eq 'qemu
') {
1909 if ($have_qemu_server) {
1910 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
1911 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1912 $qemu->{$vmid} = $conf;
1921 sub load_vmfw_conf {
1926 my $filename = "/etc/pve/firewall/$vmid.fw";
1927 if (my $fh = IO::File->new($filename, O_RDONLY)) {
1928 $vmfw_conf = parse_vm_fw_rules($filename, $fh);
1934 sub read_vm_firewall_configs {
1936 my $vmfw_configs = {};
1938 foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
1939 my $vmfw_conf = load_vmfw_conf($vmid);
1940 next if !$vmfw_conf->{options}; # skip if file does not exists
1941 $vmfw_configs->{$vmid} = $vmfw_conf;
1944 return $vmfw_configs;
1947 sub get_option_log_level {
1948 my ($options, $k) = @_;
1950 my $v = $options->{$k};
1951 $v = $default_log_level if !defined($v);
1953 return undef if $v eq '' || $v eq 'nolog
';
1955 $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
1957 return $v if ($v >= 0) && ($v <= 7);
1959 warn "unknown log level ($k = '$v')\n";
1964 sub generate_std_chains {
1965 my ($ruleset, $options) = @_;
1967 my $loglevel = get_option_log_level($options, 'smurf_log_level
');
1969 # same as shorewall smurflog.
1970 my $chain = 'PVEFW-smurflog
';
1972 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
1973 push @{$pve_std_chains->{$chain}}, "-j DROP";
1975 # same as shorewall logflags action.
1976 $loglevel = get_option_log_level($options, 'tcp_flags_log_level
');
1977 $chain = 'PVEFW-logflags
';
1978 # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
1979 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
1980 push @{$pve_std_chains->{$chain}}, "-j DROP";
1982 foreach my $chain (keys %$pve_std_chains) {
1983 ruleset_create_chain($ruleset, $chain);
1984 foreach my $rule (@{$pve_std_chains->{$chain}}) {
1986 ruleset_generate_rule($ruleset, $chain, $rule);
1988 ruleset_addrule($ruleset, $chain, $rule);
1994 sub generate_ipset_chains {
1995 my ($ipset_ruleset, $options) = @_;
1997 foreach my $ipset (keys %{$options->{ipset}}) {
1998 generate_ipset($ipset_ruleset, $ipset, $options->{ipset}->{$ipset});
2002 sub generate_ipset {
2003 my ($ipset_ruleset, $name, $options) = @_;
2005 push @{$ipset_ruleset->{$name}}, "create $name $options->{type}";
2007 foreach my $ip (@{$options->{ip}}) {
2008 push @{$ipset_ruleset->{$name}}, "add $name $ip";
2012 sub save_pvefw_status {
2015 die "unknown status '$status' - internal error"
2016 if $status !~ m/^(stopped|active)$/;
2018 mkdir dirname($pve_fw_status_filename);
2019 PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
2022 sub read_pvefw_status {
2024 my $status = 'unknown
';
2026 return 'stopped
' if ! -f $pve_fw_status_filename;
2029 $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
2036 # fixme: move to pve-common PVE::ProcFSTools
2037 sub read_proc_net_route {
2038 my $filename = "/proc/net/route";
2042 my $fh = IO::File->new ($filename, "r");
2043 return $res if !$fh;
2045 my $int_to_quad = sub {
2046 return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
2049 while (defined(my $line = <$fh>)) {
2050 next if $line =~/^Iface\s+Destination/; # skip head
2051 my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
2052 push @{$res->{$iface}}, {
2053 dest => &$int_to_quad(hex($dest)),
2054 gateway => &$int_to_quad(hex($gateway)),
2055 mask => &$int_to_quad(hex($mask)),
2064 sub load_clusterfw_conf {
2066 my $cluster_conf = {};
2067 if (my $fh = IO::File->new($clusterfw_conf_filename, O_RDONLY)) {
2068 $cluster_conf = parse_cluster_fw_rules($clusterfw_conf_filename, $fh);
2071 return $cluster_conf;
2074 my $rules_to_conf = sub {
2075 my ($rules, $need_iface) = @_;
2079 foreach my $rule (@$rules) {
2080 if ($rule->{type} eq 'in' || $rule->{type} eq 'out
') {
2081 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2082 $raw .= uc($rule->{type});
2083 $raw .= " " . $rule->{action};
2084 $raw .= " " . ($rule->{iface} || '-') if $need_iface;
2085 $raw .= " " . ($rule->{source} || '-');
2086 $raw .= " " . ($rule->{dest} || '-');
2087 $raw .= " " . ($rule->{proto} || '-');
2088 $raw .= " " . ($rule->{dport} || '-');
2089 $raw .= " " . ($rule->{sport} || '-');
2090 $raw .= " # " . encode('utf8
', $rule->{comment})
2091 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2094 die "implement me '$rule->{type
}'";
2101 sub save_clusterfw_conf {
2102 my ($cluster_conf) = @_;
2106 my $options = $cluster_conf->{options};
2107 if (scalar(keys %$options)) {
2108 $raw .= "[OPTIONS]\n\n";
2109 foreach my $opt (keys %$options) {
2110 $raw .= "$opt: $options->{$opt}\n";
2117 my $rules = $cluster_conf->{rules};
2118 if (scalar(@$rules)) {
2119 $raw .= "[RULES]\n\n";
2120 $raw .= &$rules_to_conf($rules, 1);
2124 foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2125 my $rules = $cluster_conf->{groups}->{$group};
2126 $raw .= "[group $group]\n\n";
2127 $raw .= &$rules_to_conf($rules, 0);
2131 PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2134 sub load_hostfw_conf {
2136 my $hostfw_conf = {};
2137 my $filename = "/etc/pve/local/host.fw";
2138 if (my $fh = IO::File->new($filename, O_RDONLY)) {
2139 $hostfw_conf = parse_host_fw_rules($filename, $fh);
2141 return $hostfw_conf;
2145 my $vmdata = read_local_vm_config();
2146 my $vmfw_configs = read_vm_firewall_configs($vmdata);
2148 my $routing_table = read_proc_net_route();
2150 my $cluster_conf = load_clusterfw_conf();
2152 my $ipset_ruleset = {};
2153 generate_ipset_chains($ipset_ruleset, $cluster_conf);
2157 ruleset_create_chain($ruleset, "PVEFW-INPUT");
2158 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2160 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2162 my $hostfw_conf = load_hostfw_conf();
2163 my $hostfw_options = $hostfw_conf->{options} || {};
2165 generate_std_chains($ruleset, $hostfw_options);
2167 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2169 enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
2171 # generate firewall rules for QEMU VMs
2172 foreach my $vmid (keys %{$vmdata->{qemu}}) {
2173 my $conf = $vmdata->{qemu}->{$vmid};
2174 my $vmfw_conf = $vmfw_configs->{$vmid};
2175 next if !$vmfw_conf;
2176 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2178 foreach my $netid (keys %$conf) {
2179 next if $netid !~ m/^net(\d+)$/;
2180 my $net = PVE::QemuServer::parse_net($conf->{$netid});
2182 my $iface = "tap${vmid}i$1";
2184 my $bridge = $net->{bridge};
2185 next if !$bridge; # fixme: ?
2187 $bridge .= "v$net->{tag}" if $net->{tag};
2189 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2191 my $macaddr = $net->{macaddr};
2192 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2193 $vmfw_conf, $vmid, $bridge, 'IN
');
2194 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2195 $vmfw_conf, $vmid, $bridge, 'OUT
');
2199 # generate firewall rules for OpenVZ containers
2200 foreach my $vmid (keys %{$vmdata->{openvz}}) {
2201 my $conf = $vmdata->{openvz}->{$vmid};
2203 my $vmfw_conf = $vmfw_configs->{$vmid};
2204 next if !$vmfw_conf;
2205 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2207 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2208 my $ip = $conf->{ip_address}->{value};
2209 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN
');
2210 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT
');
2213 if ($conf->{netif} && $conf->{netif}->{value}) {
2214 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2215 foreach my $netid (keys %$netif) {
2216 my $d = $netif->{$netid};
2217 my $bridge = $d->{bridge};
2219 warn "no bridge device for CT $vmid iface '$netid'\n";
2223 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2225 my $macaddr = $d->{mac};
2226 my $iface = $d->{host_ifname};
2227 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2228 $vmfw_conf, $vmid, $bridge, 'IN
');
2229 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2230 $vmfw_conf, $vmid, $bridge, 'OUT
');
2235 if($hostfw_options->{optimize}){
2237 my $accept = ruleset_chain_exist($ruleset, "PVEFW-IPS") ? "PVEFW-IPS" : "ACCEPT";
2238 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
2239 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate INVALID -j DROP");
2242 # fixme: what log level should we use here?
2243 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2245 # fixme: should we really block inter-bridge traffic?
2247 # always allow traffic from containers?
2248 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN");
2250 # disable interbridge routing
2251 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop");
2252 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop");
2253 ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-o vmbr+");
2254 ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-i vmbr+");
2255 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP");
2256 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP");
2258 return wantarray ? ($ruleset, $hostfw_conf, $ipset_ruleset) : $ruleset;
2261 sub get_ruleset_status {
2262 my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2264 my $statushash = {};
2266 foreach my $chain (sort keys %$ruleset) {
2267 my $sig = &$digest_fn($ruleset->{$chain});
2269 $statushash->{$chain}->{sig} = $sig;
2271 my $oldsig = $active_chains->{$chain};
2272 if (!defined($oldsig)) {
2273 $statushash->{$chain}->{action} = 'create
';
2275 if ($oldsig eq $sig) {
2276 $statushash->{$chain}->{action} = 'exists';
2278 $statushash->{$chain}->{action} = 'update
';
2281 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2282 foreach my $cmd (@{$ruleset->{$chain}}) {
2283 print "\t$cmd\n" if $verbose;
2287 foreach my $chain (sort keys %$active_chains) {
2288 if (!defined($ruleset->{$chain})) {
2289 my $sig = $active_chains->{$chain};
2290 $statushash->{$chain}->{action} = 'delete';
2291 $statushash->{$chain}->{sig} = $sig;
2292 print "delete $chain ($sig)\n" if $verbose;
2299 sub print_sig_rule {
2300 my ($chain, $sig) = @_;
2302 # We just use this to store a SHA1 checksum used to detect changes
2303 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2306 sub get_ruleset_cmdlist {
2307 my ($ruleset, $verbose) = @_;
2309 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2311 my ($active_chains, $hooks) = iptables_get_chains();
2312 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2314 # create missing chains first
2315 foreach my $chain (sort keys %$ruleset) {
2316 my $stat = $statushash->{$chain};
2317 die "internal error" if !$stat;
2318 next if $stat->{action} ne 'create
';
2320 $cmdlist .= ":$chain - [0:0]\n";
2323 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2324 if (!$hooks->{$h}) {
2325 $cmdlist .= "-A $h -j PVEFW-$h\n";
2329 foreach my $chain (sort keys %$ruleset) {
2330 my $stat = $statushash->{$chain};
2331 die "internal error" if !$stat;
2333 if ($stat->{action
} eq 'update' || $stat->{action
} eq 'create') {
2334 $cmdlist .= "-F $chain\n";
2335 foreach my $cmd (@{$ruleset->{$chain}}) {
2336 $cmdlist .= "$cmd\n";
2338 $cmdlist .= print_sig_rule
($chain, $stat->{sig
});
2339 } elsif ($stat->{action
} eq 'delete') {
2340 die "internal error"; # this should not happen
2341 } elsif ($stat->{action
} eq 'exists') {
2344 die "internal error - unknown status '$stat->{action}'";
2348 foreach my $chain (keys %$statushash) {
2349 next if $statushash->{$chain}->{action
} ne 'delete';
2350 $cmdlist .= "-F $chain\n";
2352 foreach my $chain (keys %$statushash) {
2353 next if $statushash->{$chain}->{action
} ne 'delete';
2354 next if $chain eq 'PVEFW-INPUT';
2355 next if $chain eq 'PVEFW-OUTPUT';
2356 next if $chain eq 'PVEFW-FORWARD';
2357 $cmdlist .= "-X $chain\n";
2360 my $changes = $cmdlist ne "*filter\n" ?
1 : 0;
2362 $cmdlist .= "COMMIT\n";
2364 return wantarray ?
($cmdlist, $changes) : $cmdlist;
2367 sub get_ipset_cmdlist
{
2368 my ($ruleset, $verbose) = @_;
2372 my $active_chains = ipset_get_chains
();
2373 my $statushash = get_ruleset_status
($ruleset, $active_chains, \
&ipset_chain_digest
, $verbose);
2375 foreach my $chain (sort keys %$ruleset) {
2376 my $stat = $statushash->{$chain};
2377 die "internal error" if !$stat;
2379 if ($stat->{action
} eq 'create') {
2380 foreach my $cmd (@{$ruleset->{$chain}}) {
2381 $cmdlist .= "$cmd\n";
2385 if ($stat->{action
} eq 'update') {
2386 my $chain_swap = $chain."_swap";
2388 foreach my $cmd (@{$ruleset->{$chain}}) {
2389 $cmd =~ s/$chain/$chain_swap/;
2390 $cmdlist .= "$cmd\n";
2393 $cmdlist .= "swap $chain_swap $chain\n";
2394 $cmdlist .= "flush $chain_swap\n";
2395 $cmdlist .= "destroy $chain_swap\n";
2400 foreach my $chain (keys %$statushash) {
2401 next if $statushash->{$chain}->{action
} ne 'delete';
2403 $cmdlist .= "flush $chain\n";
2404 $cmdlist .= "destroy $chain\n";
2407 my $changes = $cmdlist ?
1 : 0;
2409 return wantarray ?
($cmdlist, $changes) : $cmdlist;
2413 my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
2415 enable_bridge_firewall
();
2417 update_nf_conntrack_max
($hostfw_conf);
2419 my $ipsetcmdlist = get_ipset_cmdlist
($ipset_ruleset, $verbose);
2421 my $cmdlist = get_ruleset_cmdlist
($ruleset, $verbose);
2423 print $ipsetcmdlist if $verbose;
2425 print $cmdlist if $verbose;
2427 ipset_restore_cmdlist
($ipsetcmdlist);
2429 iptables_restore_cmdlist
($cmdlist);
2431 # test: re-read status and check if everything is up to date
2432 my $active_chains = iptables_get_chains
();
2433 my $statushash = get_ruleset_status
($ruleset, $active_chains, \
&iptables_chain_digest
, $verbose);
2436 foreach my $chain (sort keys %$ruleset) {
2437 my $stat = $statushash->{$chain};
2438 if ($stat->{action
} ne 'exists') {
2439 warn "unable to update chain '$chain'\n";
2444 die "unable to apply firewall changes\n" if $errors;
2447 sub update_nf_conntrack_max
{
2448 my ($hostfw_conf) = @_;
2450 my $max = 65536; # reasonable default
2452 my $options = $hostfw_conf->{options
} || {};
2454 if (defined($options->{nf_conntrack_max
}) && ($options->{nf_conntrack_max
} > $max)) {
2455 $max = $options->{nf_conntrack_max
};
2456 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2459 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2460 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2462 my $current = int(PVE
::Tools
::file_read_firstline
($filename_nf_conntrack_max) || $max);
2464 if ($current != $max) {
2465 my $hashsize = int($max/4);
2466 PVE
::ProcFSTools
::write_proc_entry
($filename_hashsize, $hashsize);
2467 PVE
::ProcFSTools
::write_proc_entry
($filename_nf_conntrack_max, $max);
2471 sub remove_pvefw_chains
{
2473 my ($chash, $hooks) = iptables_get_chains
();
2474 my $cmdlist = "*filter\n";
2476 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2478 $cmdlist .= "-D $h -j PVEFW-$h\n";
2482 foreach my $chain (keys %$chash) {
2483 $cmdlist .= "-F $chain\n";
2486 foreach my $chain (keys %$chash) {
2487 $cmdlist .= "-X $chain\n";
2489 $cmdlist .= "COMMIT\n";
2491 iptables_restore_cmdlist
($cmdlist);
2495 my ($start, $verbose) = @_;
2498 my $status = read_pvefw_status
();
2500 my ($ruleset, $hostfw_conf, $ipset_ruleset) = compile
();
2502 if ($start || $status eq 'active') {
2504 save_pvefw_status
('active') if ($status ne 'active');
2506 apply_ruleset
($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
2508 print "Firewall not active (status = $status)\n" if $verbose;