14 use PVE
::Tools
qw(run_command lock_file);
18 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
19 my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
21 my $default_log_level = 'info';
23 my $log_level_hash = {
34 # imported/converted from: /usr/share/shorewall/macro.*
37 { action
=> 'PARAM', proto
=> 'udp', dport
=> '10080' },
38 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10080' },
41 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '113' },
44 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '179' },
47 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6889' },
48 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
51 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6999' },
52 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
55 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2401' },
58 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1494' },
59 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1604' },
60 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2598' },
63 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3689' },
64 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3689' },
67 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6277' },
70 { action
=> 'PARAM', proto
=> 'udp', dport
=> '67:68', sport
=> '67:68' },
71 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '67:68', sport
=> '67:68' },
74 { action
=> 'PARAM', proto
=> 'udp', dport
=> '53' },
75 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '53' },
78 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3632' },
81 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '4662' },
82 { action
=> 'PARAM', proto
=> 'udp', dport
=> '4665' },
85 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '21' },
88 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '79' },
91 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2086' },
92 { action
=> 'PARAM', proto
=> 'udp', dport
=> '2086' },
93 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1080' },
94 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1080' },
97 { action
=> 'PARAM', proto
=> '47' },
98 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '47' },
101 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9418' },
104 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6346' },
105 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6346' },
108 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '11371' },
111 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
114 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
117 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3130' },
120 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5190' },
123 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '143' },
126 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '993' },
129 { action
=> 'PARAM', proto
=> '94' },
130 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '94' },
133 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '631' },
136 { action
=> 'PARAM', proto
=> 'udp', dport
=> '631' },
139 { action
=> 'PARAM', source
=> 'SOURCE', dest
=> 'DEST', proto
=> 'tcp', dport
=> '631' },
140 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '631' },
143 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
144 { action
=> 'PARAM', proto
=> '50' },
145 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '500', sport
=> '500' },
146 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '50' },
149 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
150 { action
=> 'PARAM', proto
=> '51' },
151 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '500', sport
=> '500' },
152 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '51' },
155 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500' },
156 { action
=> 'PARAM', proto
=> 'udp', dport
=> '4500' },
157 { action
=> 'PARAM', proto
=> '50' },
158 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '500' },
159 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '4500' },
160 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '50' },
163 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6667' },
166 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5222' },
169 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5223' },
172 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5269' },
175 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9100' },
178 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1701' },
179 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '1701' },
182 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '389' },
185 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '636' },
188 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1863' },
191 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1433' },
194 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
195 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
196 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
199 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '4949' },
202 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3306' },
205 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '119' },
208 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '563' },
211 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
214 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
215 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '123' },
218 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
219 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '123' },
222 { action
=> 'PARAM', proto
=> '89' },
225 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1194' },
228 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5632' },
229 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5631' },
232 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '110' },
235 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '995' },
238 { action
=> 'PARAM', proto
=> '47' },
239 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '47' },
240 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1723' },
243 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
246 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5432' },
249 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '515' },
252 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3389' },
255 { action
=> 'PARAM', proto
=> 'udp', dport
=> '520' },
256 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '520' },
259 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '953' },
262 { action
=> 'ACCEPT', proto
=> 'tcp', dport
=> '2703' },
265 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
268 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '873' },
271 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6566' },
274 { action
=> 'PARAM', proto
=> 'udp', dport
=> '135,445' },
275 { action
=> 'PARAM', proto
=> 'udp', dport
=> '137:139' },
276 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
277 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '135,139,445' },
280 { action
=> 'PARAM', proto
=> 'udp', dport
=> '135,445' },
281 { action
=> 'PARAM', proto
=> 'udp', dport
=> '137:139' },
282 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
283 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '135,139,445' },
284 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '135,445' },
285 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '137:139' },
286 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
287 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'tcp', dport
=> '135,139,445' },
290 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '901' },
293 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
296 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
299 { action
=> 'PARAM', proto
=> 'udp', dport
=> '161:162' },
300 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '161' },
303 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '783' },
306 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '22' },
309 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3690' },
312 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3874' },
313 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3740' },
314 { action
=> 'PARAM', proto
=> '41' },
315 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5072,8374' },
318 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3128' },
321 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
324 { action
=> 'PARAM', proto
=> 'udp', dport
=> '514' },
325 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '514' },
328 { action
=> 'PARAM', proto
=> 'udp', dport
=> '69' },
331 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '23' },
334 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '992' },
337 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
340 { action
=> 'PARAM', proto
=> 'udp', dport
=> '33434:33524' },
341 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
344 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5900:5909' },
347 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5500' },
350 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
351 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
354 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '8080' },
357 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10000' },
360 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '43' },
364 my $pve_fw_parsed_macros;
365 my $pve_fw_preferred_macro_names = {};
367 my $pve_std_chains = {
368 'PVEFW-SET-ACCEPT-MARK' => [
369 "-j MARK --set-mark 1",
371 'PVEFW-DropBroadcast' => [
372 # same as shorewall 'Broadcast'
373 # simply DROP BROADCAST/MULTICAST/ANYCAST
374 # we can use this to reduce logging
375 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
376 { action
=> 'DROP', dsttype
=> 'MULTICAST' },
377 { action
=> 'DROP', dsttype
=> 'ANYCAST' },
378 { action
=> 'DROP', dest
=> '224.0.0.0/4' },
381 # same as shorewall 'reject'
382 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
383 { action
=> 'DROP', source
=> '224.0.0.0/4' },
384 { action
=> 'DROP', proto
=> 'icmp' },
385 "-p tcp -j REJECT --reject-with tcp-reset",
386 "-p udp -j REJECT --reject-with icmp-port-unreachable",
387 "-p icmp -j REJECT --reject-with icmp-host-unreachable",
388 "-j REJECT --reject-with icmp-host-prohibited",
391 # same as shorewall 'Drop', which is equal to DROP,
392 # but REJECT/DROP some packages to reduce logging,
393 # and ACCEPT critical ICMP types
394 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
395 # we are not interested in BROADCAST/MULTICAST/ANYCAST
396 { action
=> 'PVEFW-DropBroadcast' },
397 # ACCEPT critical ICMP types
398 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
399 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
400 # Drop packets with INVALID state
401 "-m conntrack --ctstate INVALID -j DROP",
402 # Drop Microsoft SMB noise
403 { action
=> 'DROP', proto
=> 'udp', dport
=> '135,445', nbdport
=> 2 },
404 { action
=> 'DROP', proto
=> 'udp', dport
=> '137:139'},
405 { action
=> 'DROP', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
406 { action
=> 'DROP', proto
=> 'tcp', dport
=> '135,139,445', nbdport
=> 3 },
407 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
408 # Drop new/NotSyn traffic so that it doesn't get logged
409 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
411 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
414 # same as shorewall 'Reject', which is equal to Reject,
415 # but REJECT/DROP some packages to reduce logging,
416 # and ACCEPT critical ICMP types
417 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
418 # we are not interested in BROADCAST/MULTICAST/ANYCAST
419 { action
=> 'PVEFW-DropBroadcast' },
420 # ACCEPT critical ICMP types
421 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
422 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
423 # Drop packets with INVALID state
424 "-m conntrack --ctstate INVALID -j DROP",
425 # Drop Microsoft SMB noise
426 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '135,445', nbdport
=> 2 },
427 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '137:139'},
428 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
429 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '135,139,445', nbdport
=> 3 },
430 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
431 # Drop new/NotSyn traffic so that it doesn't get logged
432 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
434 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
436 'PVEFW-tcpflags' => [
437 # same as shorewall tcpflags action.
438 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
439 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
440 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
441 "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
442 "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
443 "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
446 # same as shorewall smurfs action
447 # Filter packets for smurfs (packets with a broadcast address as the source).
448 "-s 0.0.0.0/32 -j RETURN",
449 "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
450 "-s 224.0.0.0/4 -g PVEFW-smurflog",
454 # iptables -p icmp -h
455 my $icmp_type_names = {
458 'destination-unreachable' => 1,
459 'network-unreachable' => 1,
460 'host-unreachable' => 1,
461 'protocol-unreachable' => 1,
462 'port-unreachable' => 1,
463 'fragmentation-needed' => 1,
464 'source-route-failed' => 1,
465 'network-unknown' => 1,
467 'network-prohibited' => 1,
468 'host-prohibited' => 1,
469 'TOS-network-unreachable' => 1,
470 'TOS-host-unreachable' => 1,
471 'communication-prohibited' => 1,
472 'host-precedence-violation' => 1,
473 'precedence-cutoff' => 1,
474 'source-quench' => 1,
476 'network-redirect' => 1,
477 'host-redirect' => 1,
478 'TOS-network-redirect' => 1,
479 'TOS-host-redirect' => 1,
481 'router-advertisement' => 1,
482 'router-solicitation' => 1,
483 'time-exceeded' => 1,
484 'ttl-zero-during-transit' => 1,
485 'ttl-zero-during-reassembly' => 1,
486 'parameter-problem' => 1,
487 'ip-header-bad' => 1,
488 'required-option-missing' => 1,
489 'timestamp-request' => 1,
490 'timestamp-reply' => 1,
491 'address-mask-request' => 1,
492 'address-mask-reply' => 1,
495 sub get_firewall_macros
{
497 return $pve_fw_parsed_macros if $pve_fw_parsed_macros;
499 $pve_fw_parsed_macros = {};
501 foreach my $k (keys %$pve_fw_macros) {
504 my $macro = $pve_fw_macros->{$k};
505 $pve_fw_preferred_macro_names->{$name} = $k;
506 $pve_fw_parsed_macros->{$name} = $macro;
509 return $pve_fw_parsed_macros;
514 sub get_etc_services
{
516 return $etc_services if $etc_services;
518 my $filename = "/etc/services";
520 my $fh = IO
::File-
>new($filename, O_RDONLY
);
522 warn "unable to read '$filename' - $!\n";
528 while (my $line = <$fh>) {
530 next if $line =~m/^#/;
531 next if ($line =~m/^\s*$/);
533 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
534 $services->{byid
}->{$2}->{name
} = $1;
535 $services->{byid
}->{$2}->{port
} = $2;
536 $services->{byid
}->{$2}->{$3} = 1;
537 $services->{byname
}->{$1} = $services->{byid
}->{$2};
543 $etc_services = $services;
546 return $etc_services;
551 sub get_etc_protocols
{
552 return $etc_protocols if $etc_protocols;
554 my $filename = "/etc/protocols";
556 my $fh = IO
::File-
>new($filename, O_RDONLY
);
558 warn "unable to read '$filename' - $!\n";
564 while (my $line = <$fh>) {
566 next if $line =~m/^#/;
567 next if ($line =~m/^\s*$/);
569 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
570 $protocols->{byid
}->{$2}->{name
} = $1;
571 $protocols->{byname
}->{$1} = $protocols->{byid
}->{$2};
577 $etc_protocols = $protocols;
579 return $etc_protocols;
582 sub parse_address_list
{
586 foreach my $aor (split(/,/, $str)) {
587 if (!Net
::IP-
>new($aor)) {
588 my $err = Net
::IP
::Error
();
589 die "invalid IP address: $err\n";
597 sub parse_port_name_number_or_range
{
600 my $services = PVE
::Firewall
::get_etc_services
();
602 foreach my $item (split(/,/, $str)) {
606 foreach my $pon (split(':', $item, 2)) {
607 $pon = $services->{byname
}->{$pon}->{port
} if $services->{byname
}->{$pon}->{port
};
608 if ($pon =~ m/^\d+$/){
609 die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535;
610 die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon);
613 die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname
}->{$pon};
621 my $bridge_firewall_enabled = 0;
623 sub enable_bridge_firewall
{
625 return if $bridge_firewall_enabled; # only once
627 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
628 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
630 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
631 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/ipv4/tcp_syncookies", "1");
633 $bridge_firewall_enabled = 1;
636 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
641 run_command
("/sbin/iptables $cmd", outfunc
=> sub {}, errfunc
=> sub {});
644 sub iptables_restore_cmdlist
{
647 run_command
("/sbin/iptables-restore -n", input
=> $cmdlist);
650 sub iptables_get_chains
{
654 # check what chains we want to track
655 my $is_pvefw_chain = sub {
658 return 1 if $name =~ m/^PVEFW-\S+$/;
660 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
661 return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT)$/;
662 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
672 return if $line =~ m/^#/;
673 return if $line =~ m/^\s*$/;
675 if ($line =~ m/^\*(\S+)$/) {
680 return if $table ne 'filter';
682 if ($line =~ m/^:(\S+)\s/) {
684 return if !&$is_pvefw_chain($chain);
685 $res->{$chain} = "unknown";
686 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
687 my ($chain, $sig) = ($1, $2);
688 return if !&$is_pvefw_chain($chain);
689 $res->{$chain} = $sig;
691 # simply ignore the rest
696 run_command
("/sbin/iptables-save", outfunc
=> $parser);
701 sub iptables_chain_exist
{
705 iptables
("-n --list $chain");
712 sub iptables_rule_exist
{
716 iptables
("-C $rule");
723 sub ruleset_generate_rule
{
724 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
726 return if $rule->{disable
};
730 push @cmd, "-m iprange --src-range" if $rule->{nbsource
} && $rule->{nbsource
} > 1;
731 push @cmd, "-s $rule->{source}" if $rule->{source
};
732 push @cmd, "-m iprange --dst-range" if $rule->{nbdest
} && $rule->{nbdest
} > 1;
733 push @cmd, "-d $rule->{dest}" if $rule->{dest
};
735 if ($rule->{proto
}) {
736 push @cmd, "-p $rule->{proto}";
739 $multiport++ if $rule->{nbdport
} && ($rule->{nbdport
} > 1);
740 $multiport++ if $rule->{nbsport
} && ($rule->{nbsport
} > 1);
742 push @cmd, "--match multiport" if $multiport;
744 die "multiport: option '--sports' cannot be used together with '--dports'\n"
745 if ($multiport == 2) && ($rule->{dport
} ne $rule->{sport
});
747 if ($rule->{dport
}) {
748 if ($rule->{proto
} && $rule->{proto
} eq 'icmp') {
749 # Note: we use dport to store --icmp-type
750 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport
}});
751 push @cmd, "-m icmp --icmp-type $rule->{dport}";
753 if ($rule->{nbdport
} && $rule->{nbdport
} > 1) {
754 if ($multiport == 2) {
755 push @cmd, "--ports $rule->{dport}";
757 push @cmd, "--dports $rule->{dport}";
760 push @cmd, "--dport $rule->{dport}";
765 if ($rule->{sport
}) {
766 if ($rule->{nbsport
} && $rule->{nbsport
} > 1) {
767 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
769 push @cmd, "--sport $rule->{sport}";
772 } elsif ($rule->{dport
} || $rule->{sport
}) {
773 warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport
};
774 warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport
};
777 push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype
};
779 if (my $action = $rule->{action
}) {
780 $action = $actions->{$action} if defined($actions->{$action});
781 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
782 push @cmd, $goto ?
"-g $action" : "-j $action";
786 my $cmdstr = join(' ', @cmd);
787 ruleset_addrule
($ruleset, $chain, $cmdstr);
791 sub ruleset_create_chain
{
792 my ($ruleset, $chain) = @_;
794 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
796 die "chain '$chain' already exists\n" if $ruleset->{$chain};
798 $ruleset->{$chain} = [];
801 sub ruleset_chain_exist
{
802 my ($ruleset, $chain) = @_;
804 return $ruleset->{$chain} ?
1 : undef;
807 sub ruleset_addrule
{
808 my ($ruleset, $chain, $rule) = @_;
810 die "no such chain '$chain'\n" if !$ruleset->{$chain};
812 push @{$ruleset->{$chain}}, "-A $chain $rule";
815 sub ruleset_insertrule
{
816 my ($ruleset, $chain, $rule) = @_;
818 die "no such chain '$chain'\n" if !$ruleset->{$chain};
820 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
823 sub generate_bridge_chains
{
824 my ($ruleset, $hostfw_conf, $bridge) = @_;
826 my $options = $hostfw_conf->{options
} || {};
828 # fixme: what log level should we use here?
829 my $loglevel = get_option_log_level
($options, "log_level_out");
831 if (!ruleset_chain_exist
($ruleset, "$bridge-FW")) {
832 ruleset_create_chain
($ruleset, "$bridge-FW");
833 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
834 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
835 # disable interbridge routing
836 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-o $bridge -j PVEFW-Drop");
837 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-i $bridge -j PVEFW-Drop");
838 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-o $bridge -j LOG --log-prefix \"PVEFW-FORWARD-dropped \" --log-level $loglevel");
839 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-i $bridge -j LOG --log-prefix \"PVEFW-FORWARD-dropped \" --log-level $loglevel");
840 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-o $bridge -j DROP");
841 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-i $bridge -j DROP");
844 if (!ruleset_chain_exist
($ruleset, "$bridge-OUT")) {
845 ruleset_create_chain
($ruleset, "$bridge-OUT");
846 ruleset_addrule
($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-in -j $bridge-OUT");
847 ruleset_addrule
($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-bridged --physdev-is-in -j $bridge-OUT");
850 if (!ruleset_chain_exist
($ruleset, "$bridge-IN")) {
851 ruleset_create_chain
($ruleset, "$bridge-IN");
852 ruleset_addrule
($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j $bridge-IN");
853 ruleset_addrule
($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
854 # accept traffic to unmanaged bridge ports
855 ruleset_addrule
($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j ACCEPT ");
859 sub ruleset_add_chain_policy
{
860 my ($ruleset, $chain, $policy, $loglevel, $accept_action) = @_;
862 if ($policy eq 'ACCEPT') {
864 ruleset_generate_rule
($ruleset, $chain, { action
=> 'ACCEPT' },
865 { ACCEPT
=> $accept_action});
867 } elsif ($policy eq 'DROP') {
869 ruleset_addrule
($ruleset, $chain, "-j PVEFW-Drop");
871 ruleset_addrule
($ruleset, $chain, "-j LOG --log-prefix \"$chain-dropped: \" --log-level $loglevel")
872 if defined($loglevel);
874 ruleset_addrule
($ruleset, $chain, "-j DROP");
875 } elsif ($policy eq 'REJECT') {
876 ruleset_addrule
($ruleset, $chain, "-j PVEFW-Reject");
878 ruleset_addrule
($ruleset, $chain, "-j LOG --log-prefix \"$chain-reject: \" --log-level $loglevel")
879 if defined($loglevel);
881 ruleset_addrule
($ruleset, $chain, "-g PVEFW-reject");
884 die "internal error: unknown policy '$policy'";
888 sub generate_tap_rules_direction
{
889 my ($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, $direction) = @_;
891 my $lc_direction = lc($direction);
893 my $rules = $vmfw_conf->{rules
};
895 my $options = $vmfw_conf->{options
};
896 my $loglevel = get_option_log_level
($options, "log_level_${lc_direction}");
898 my $tapchain = "$iface-$direction";
900 ruleset_create_chain
($ruleset, $tapchain);
902 if (!(defined($options->{nosmurfs
}) && $options->{nosmurfs
} == 0)) {
903 ruleset_addrule
($ruleset, $tapchain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
906 if (!(defined($options->{dhcp
}) && $options->{dhcp
} == 0)) {
907 ruleset_addrule
($ruleset, $tapchain, "-p udp -m udp --dport 67:68 -j ACCEPT");
910 if ($options->{tcpflags
}) {
911 ruleset_addrule
($ruleset, $tapchain, "-p tcp -j PVEFW-tcpflags");
914 ruleset_addrule
($ruleset, $tapchain, "-m conntrack --ctstate INVALID -j DROP");
915 ruleset_addrule
($ruleset, $tapchain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
917 if ($direction eq 'OUT') {
918 if (defined($macaddr) && !(defined($options->{macfilter
}) && $options->{macfilter
} == 0)) {
919 ruleset_addrule
($ruleset, $tapchain, "-m mac ! --mac-source $macaddr -j DROP");
921 ruleset_addrule
($ruleset, $tapchain, "-j MARK --set-mark 0"); # clear mark
924 foreach my $rule (@$rules) {
925 next if $rule->{iface
} && $rule->{iface
} ne $netid;
926 next if $rule->{disable
};
927 if ($rule->{type
} eq 'group') {
928 my $group_chain = "GROUP-$rule->{action}-$direction";
929 if(!ruleset_chain_exist
($ruleset, $group_chain)){
930 generate_group_rules
($ruleset, $groups_conf, $rule->{action
});
932 ruleset_addrule
($ruleset, $tapchain, "-j $group_chain");
933 ruleset_addrule
($ruleset, $tapchain, "-m mark --mark 1 -j RETURN")
934 if $direction eq 'OUT';
936 next if $rule->{type
} ne $lc_direction;
937 if ($direction eq 'OUT') {
938 ruleset_generate_rule
($ruleset, $tapchain, $rule,
939 { ACCEPT
=> "PVEFW-SET-ACCEPT-MARK", REJECT
=> "PVEFW-reject" });
941 ruleset_generate_rule
($ruleset, $tapchain, $rule, { REJECT
=> "PVEFW-reject" });
949 if ($direction eq 'OUT') {
950 $policy = $options->{'policy-out'} || 'ACCEPT'; # allow everything by default
952 $policy = $options->{'policy-in'} || 'DROP'; # allow nothing by default
955 my $accept_action = $direction eq 'OUT' ?
"PVEFW-SET-ACCEPT-MARK" : "ACCEPT";
956 ruleset_add_chain_policy
($ruleset, $tapchain, $policy, $loglevel, $accept_action);
958 # plug the tap chain to bridge chain
959 my $physdevdirection = $direction eq 'IN' ?
"out" : "in";
960 my $rule = "-m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain";
961 ruleset_insertrule
($ruleset, "$bridge-$direction", $rule);
964 sub enable_host_firewall
{
965 my ($ruleset, $hostfw_conf, $groups_conf) = @_;
967 # fixme: allow security groups
969 my $options = $hostfw_conf->{options
};
970 my $rules = $hostfw_conf->{rules
};
972 # host inbound firewall
973 my $chain = "PVEFW-HOST-IN";
974 ruleset_create_chain
($ruleset, $chain);
976 my $loglevel = get_option_log_level
($options, "log_level_in");
978 ruleset_addrule
($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
979 ruleset_addrule
($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
980 ruleset_addrule
($ruleset, $chain, "-i lo -j ACCEPT");
981 ruleset_addrule
($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
982 ruleset_addrule
($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
983 ruleset_addrule
($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
985 # we use RETURN because we need to check also tap rules
986 my $accept_action = 'RETURN';
988 foreach my $rule (@$rules) {
989 next if $rule->{type
} ne 'in';
990 ruleset_generate_rule
($ruleset, $chain, $rule, { ACCEPT
=> $accept_action, REJECT
=> "PVEFW-reject" });
993 # implement input policy
994 my $policy = $options->{'policy-in'} || 'DROP'; # allow nothing by default
995 ruleset_add_chain_policy
($ruleset, $chain, $policy, $loglevel, $accept_action);
997 # host outbound firewall
998 $chain = "PVEFW-HOST-OUT";
999 ruleset_create_chain
($ruleset, $chain);
1001 $loglevel = get_option_log_level
($options, "log_level_out");
1003 ruleset_addrule
($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1004 ruleset_addrule
($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1005 ruleset_addrule
($ruleset, $chain, "-o lo -j ACCEPT");
1006 ruleset_addrule
($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1007 ruleset_addrule
($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
1008 ruleset_addrule
($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
1010 # we use RETURN because we may want to check other thigs later
1011 $accept_action = 'RETURN';
1013 foreach my $rule (@$rules) {
1014 next if $rule->{type
} ne 'out';
1015 ruleset_generate_rule
($ruleset, $chain, $rule, { ACCEPT
=> $accept_action, REJECT
=> "PVEFW-reject" });
1018 # implement output policy
1019 $policy = $options->{'policy-out'} || 'ACCEPT'; # allow everything by default
1020 ruleset_add_chain_policy
($ruleset, $chain, $policy, $loglevel, $accept_action);
1022 ruleset_addrule
($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1023 ruleset_addrule
($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1026 sub generate_group_rules
{
1027 my ($ruleset, $groups_conf, $group) = @_;
1029 die "no such security group '$group'\n" if !$groups_conf->{$group};
1031 my $rules = $groups_conf->{$group}->{rules
};
1033 my $chain = "GROUP-${group}-IN";
1035 ruleset_create_chain
($ruleset, $chain);
1037 foreach my $rule (@$rules) {
1038 next if $rule->{type
} ne 'in';
1039 ruleset_generate_rule
($ruleset, $chain, $rule, { REJECT
=> "PVEFW-reject" });
1042 $chain = "GROUP-${group}-OUT";
1044 ruleset_create_chain
($ruleset, $chain);
1045 ruleset_addrule
($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1047 foreach my $rule (@$rules) {
1048 next if $rule->{type
} ne 'out';
1049 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1050 # check also other tap rules later
1051 ruleset_generate_rule
($ruleset, $chain, $rule,
1052 { ACCEPT
=> 'PVEFW-SET-ACCEPT-MARK', REJECT
=> "PVEFW-reject" });
1057 my $valid_netdev_names = {};
1058 for (my $i = 0; $i < $MAX_NETS; $i++) {
1059 $valid_netdev_names->{"net$i"} = 1;
1063 my ($line, $need_iface, $allow_groups) = @_;
1065 my $macros = get_firewall_macros
();
1066 my $protocols = get_etc_protocols
();
1068 my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
1070 # we can add single line comments to the end of the rule
1071 my $comment = $1 if $line =~ s/#\s*(.*?)\s*$//;
1073 # we can disable a rule when prefixed with '|'
1074 my $disable = 1 if $line =~ s/^\|//;
1076 my @data = split(/\s+/, $line);
1077 my $expected_elements = $need_iface ?
8 : 7;
1079 die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1082 ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
1084 ($type, $action, $source, $dest, $proto, $dport, $sport) = @data;
1087 die "incomplete rule\n" if ! ($type && $action);
1094 if ($type eq 'in' || $type eq 'out') {
1095 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1097 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1098 ($macro_name, $action) = ($1, $2);
1099 my $lc_macro_name = lc($macro_name);
1100 my $preferred_name = $pve_fw_preferred_macro_names->{$lc_macro_name};
1101 $macro_name = $preferred_name if $preferred_name;
1102 $macro = $macros->{$lc_macro_name};
1103 die "unknown macro '$macro_name'\n" if !$macro;
1105 die "unknown action '$action'\n";
1107 } elsif ($type eq 'group') {
1108 die "wrong number of rule elements\n" if scalar(@data) != 3;
1109 die "groups disabled\n" if !$allow_groups;
1111 die "invalid characters in group name\n" if $action !~ m/^[A-Za-z0-9_\-]+$/;
1113 die "unknown rule type '$type'\n";
1117 $iface = undef if $iface && $iface eq '-';
1118 die "unknown interface '$iface'\n"
1119 if defined($iface) && !$valid_netdev_names->{$iface};
1122 $proto = undef if $proto && $proto eq '-';
1123 die "unknown protokol '$proto'\n" if $proto &&
1124 !(defined($protocols->{byname
}->{$proto}) ||
1125 defined($protocols->{byid
}->{$proto}));
1127 $source = undef if $source && $source eq '-';
1128 $dest = undef if $dest && $dest eq '-';
1130 $dport = undef if $dport && $dport eq '-';
1131 $sport = undef if $sport && $sport eq '-';
1133 my $nbsource = undef;
1136 $nbsource = parse_address_list
($source) if $source;
1137 $nbdest = parse_address_list
($dest) if $dest;
1143 disable
=> $disable,
1144 comment
=> $comment,
1149 nbsource
=> $nbsource,
1157 foreach my $templ (@$macro) {
1159 my $param_used = {};
1160 foreach my $k (keys %$templ) {
1161 my $v = $templ->{$k};
1162 if ($v eq 'PARAM') {
1164 $param_used->{$k} = 1;
1165 } elsif ($v eq 'DEST') {
1166 $v = $param->{dest
};
1167 $param_used->{dest
} = 1;
1168 } elsif ($v eq 'SOURCE') {
1169 $v = $param->{source
};
1170 $param_used->{source
} = 1;
1173 die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
1176 foreach my $k (keys %$param) {
1177 next if !defined($param->{$k});
1178 next if $param_used->{$k};
1179 if (defined($rule->{$k})) {
1180 die "parameter '$k' already define in macro (value = '$rule->{$k}')\n"
1181 if $rule->{$k} ne $param->{$k};
1183 $rule->{$k} = $param->{$k};
1186 push @$rules, $rule;
1189 push @$rules, $param;
1192 foreach my $rule (@$rules) {
1193 $rule->{nbdport
} = parse_port_name_number_or_range
($rule->{dport
})
1194 if defined($rule->{dport
});
1195 $rule->{nbsport
} = parse_port_name_number_or_range
($rule->{sport
})
1196 if defined($rule->{sport
});
1202 sub parse_vmfw_option
{
1207 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1209 if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
1212 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1214 $value = $2 ?
lc($3) : '';
1215 } elsif ($line =~ m/^(policy-(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1220 die "can't parse option '$line'\n"
1223 return ($opt, $value);
1226 sub parse_hostfw_option
{
1231 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1233 if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
1236 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1238 $value = $2 ?
lc($3) : '';
1239 } elsif ($line =~ m/^(policy-(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1242 } elsif ($line =~ m/^(nf_conntrack_max):\s*(\d+)\s*$/i) {
1247 die "can't parse option '$line'\n"
1250 return ($opt, $value);
1253 sub parse_vm_fw_rules
{
1254 my ($filename, $fh) = @_;
1256 my $res = { rules
=> [], options
=> {}};
1260 while (defined(my $line = <$fh>)) {
1261 next if $line =~ m/^#/;
1262 next if $line =~ m/^\s*$/;
1264 my $linenr = $fh->input_line_number();
1265 my $prefix = "$filename (line $linenr)";
1267 if ($line =~ m/^\[(\S+)\]\s*$/i) {
1269 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1273 warn "$prefix: skip line - no section";
1277 next if !$res->{$section}; # skip undefined section
1279 if ($section eq 'options') {
1281 my ($opt, $value) = parse_vmfw_option
($line);
1282 $res->{options
}->{$opt} = $value;
1284 warn "$prefix: $@" if $@;
1289 eval { $rules = parse_fw_rule
($line, 1, 1); };
1291 warn "$prefix: $err";
1295 push @{$res->{$section}}, @$rules;
1301 sub parse_host_fw_rules
{
1302 my ($filename, $fh) = @_;
1304 my $res = { rules
=> [], options
=> {}};
1308 while (defined(my $line = <$fh>)) {
1309 next if $line =~ m/^#/;
1310 next if $line =~ m/^\s*$/;
1312 my $linenr = $fh->input_line_number();
1313 my $prefix = "$filename (line $linenr)";
1315 if ($line =~ m/^\[(\S+)\]\s*$/i) {
1317 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1321 warn "$prefix: skip line - no section";
1325 next if !$res->{$section}; # skip undefined section
1327 if ($section eq 'options') {
1329 my ($opt, $value) = parse_hostfw_option
($line);
1330 $res->{options
}->{$opt} = $value;
1332 warn "$prefix: $@" if $@;
1337 eval { $rules = parse_fw_rule
($line, 1, 1); };
1339 warn "$prefix: $err";
1343 push @{$res->{$section}}, @$rules;
1349 sub parse_group_fw_rules
{
1350 my ($filename, $fh) = @_;
1355 my $res = { rules
=> [] };
1357 while (defined(my $line = <$fh>)) {
1358 next if $line =~ m/^#/;
1359 next if $line =~ m/^\s*$/;
1361 my $linenr = $fh->input_line_number();
1362 my $prefix = "$filename (line $linenr)";
1364 if ($line =~ m/^\[group\s+(\S+)\]\s*$/i) {
1369 if (!$section || !$group) {
1370 warn "$prefix: skip line - no section";
1375 eval { $rules = parse_fw_rule
($line, 0, 0); };
1377 warn "$prefix: $err";
1381 push @{$res->{$group}->{$section}}, @$rules;
1388 my ($code, @param) = @_;
1392 my $res = lock_file
($pve_fw_lock_filename, $timeout, $code, @param);
1399 sub read_local_vm_config
{
1405 my $list = PVE
::QemuServer
::config_list
();
1407 foreach my $vmid (keys %$list) {
1408 my $cfspath = PVE
::QemuServer
::cfs_config_path
($vmid);
1409 if (my $conf = PVE
::Cluster
::cfs_read_file
($cfspath)) {
1410 $qemu->{$vmid} = $conf;
1414 my $vmdata = { openvz
=> $openvz, qemu
=> $qemu };
1419 sub read_vm_firewall_configs
{
1421 my $vmfw_configs = {};
1422 foreach my $vmid (keys %{$vmdata->{qemu
}}, keys %{$vmdata->{openvz
}}) {
1423 my $filename = "/etc/pve/firewall/$vmid.fw";
1424 my $fh = IO
::File-
>new($filename, O_RDONLY
);
1427 $vmfw_configs->{$vmid} = parse_vm_fw_rules
($filename, $fh);
1430 return $vmfw_configs;
1433 sub get_option_log_level
{
1434 my ($options, $k) = @_;
1436 my $v = $options->{$k};
1437 $v = $default_log_level if !defined($v);
1439 return undef if $v eq '' || $v eq 'nolog';
1441 $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
1443 return $v if ($v >= 0) && ($v <= 7);
1445 warn "unknown log level ($k = '$v')\n";
1450 sub generate_std_chains
{
1451 my ($ruleset, $options) = @_;
1453 my $loglevel = get_option_log_level
($options, 'smurf_log_level');
1455 # same as shorewall smurflog.
1456 if (defined($loglevel)) {
1457 $pve_std_chains-> {'PVEFW-smurflog'} = [
1458 "-j LOG --log-prefix \"smurfs-dropped: \" --log-level $loglevel",
1462 $pve_std_chains-> {'PVEFW-smurflog'} = [ "-j DROP" ];
1465 # same as shorewall logflags action.
1466 $loglevel = get_option_log_level
($options, 'tcp_flags_log_level');
1467 if (defined($loglevel)) {
1468 $pve_std_chains-> {'PVEFW-logflags'} = [
1469 "-j LOG --log-prefix \"logflags-dropped: \" --log-level $loglevel --log-ip-options",
1473 $pve_std_chains-> {'PVEFW-logflags'} = [ "-j DROP" ];
1476 foreach my $chain (keys %$pve_std_chains) {
1477 ruleset_create_chain
($ruleset, $chain);
1478 foreach my $rule (@{$pve_std_chains->{$chain}}) {
1480 ruleset_generate_rule
($ruleset, $chain, $rule);
1482 ruleset_addrule
($ruleset, $chain, $rule);
1488 sub save_pvefw_status
{
1491 die "unknown status '$status' - internal error"
1492 if $status !~ m/^(stopped|active)$/;
1494 mkdir dirname
($pve_fw_status_filename);
1495 PVE
::Tools
::file_set_contents
($pve_fw_status_filename, $status);
1498 sub read_pvefw_status
{
1500 my $status = 'unknown';
1502 return 'stopped' if ! -f
$pve_fw_status_filename;
1505 $status = PVE
::Tools
::file_get_contents
($pve_fw_status_filename);
1513 my $vmdata = read_local_vm_config
();
1514 my $vmfw_configs = read_vm_firewall_configs
($vmdata);
1516 my $groups_conf = {};
1517 my $filename = "/etc/pve/firewall/groups.fw";
1518 if (my $fh = IO
::File-
>new($filename, O_RDONLY
)) {
1519 $groups_conf = parse_group_fw_rules
($filename, $fh);
1522 #print Dumper($rules);
1526 ruleset_create_chain
($ruleset, "PVEFW-INPUT");
1527 ruleset_create_chain
($ruleset, "PVEFW-OUTPUT");
1529 ruleset_create_chain
($ruleset, "PVEFW-FORWARD");
1530 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1532 my $hostfw_options = {};
1533 my $hostfw_conf = {};
1535 $filename = "/etc/pve/local/host.fw";
1536 if (my $fh = IO
::File-
>new($filename, O_RDONLY
)) {
1537 $hostfw_conf = parse_host_fw_rules
($filename, $fh);
1538 $hostfw_options = $hostfw_conf->{options
};
1541 generate_std_chains
($ruleset, $hostfw_options);
1543 my $hostfw_enable = !(defined($hostfw_options->{enable
}) && ($hostfw_options->{enable
} == 0));
1545 enable_host_firewall
($ruleset, $hostfw_conf, $groups_conf) if $hostfw_enable;
1547 # generate firewall rules for QEMU VMs
1548 foreach my $vmid (keys %{$vmdata->{qemu
}}) {
1549 my $conf = $vmdata->{qemu
}->{$vmid};
1550 my $vmfw_conf = $vmfw_configs->{$vmid};
1551 next if !$vmfw_conf;
1552 next if defined($vmfw_conf->{options
}->{enable
}) && ($vmfw_conf->{options
}->{enable
} == 0);
1554 foreach my $netid (keys %$conf) {
1555 next if $netid !~ m/^net(\d+)$/;
1556 my $net = PVE
::QemuServer
::parse_net
($conf->{$netid});
1558 my $iface = "tap${vmid}i$1";
1560 my $bridge = $net->{bridge
};
1561 next if !$bridge; # fixme: ?
1563 $bridge .= "v$net->{tag}" if $net->{tag
};
1565 generate_bridge_chains
($ruleset, $hostfw_conf, $bridge);
1567 my $macaddr = $net->{macaddr
};
1568 generate_tap_rules_direction
($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'IN');
1569 generate_tap_rules_direction
($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'OUT');
1573 return wantarray ?
($ruleset, $hostfw_conf) : $ruleset;
1576 sub get_ruleset_status
{
1577 my ($ruleset, $verbose) = @_;
1579 my $active_chains = iptables_get_chains
();
1581 my $statushash = {};
1583 foreach my $chain (sort keys %$ruleset) {
1584 my $digest = Digest
::SHA-
>new('sha1');
1585 foreach my $cmd (@{$ruleset->{$chain}}) {
1586 $digest->add("$cmd\n");
1588 my $sig = $digest->b64digest;
1589 $statushash->{$chain}->{sig
} = $sig;
1591 my $oldsig = $active_chains->{$chain};
1592 if (!defined($oldsig)) {
1593 $statushash->{$chain}->{action
} = 'create';
1595 if ($oldsig eq $sig) {
1596 $statushash->{$chain}->{action
} = 'exists';
1598 $statushash->{$chain}->{action
} = 'update';
1601 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
1602 foreach my $cmd (@{$ruleset->{$chain}}) {
1603 print "\t$cmd\n" if $verbose;
1607 foreach my $chain (sort keys %$active_chains) {
1608 if (!defined($ruleset->{$chain})) {
1609 my $sig = $active_chains->{$chain};
1610 $statushash->{$chain}->{action
} = 'delete';
1611 $statushash->{$chain}->{sig
} = $sig;
1612 print "delete $chain ($sig)\n" if $verbose;
1622 get_ruleset_status
($ruleset, 1);
1625 sub print_sig_rule
{
1626 my ($chain, $sig) = @_;
1628 # We just use this to store a SHA1 checksum used to detect changes
1629 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
1632 sub get_rulset_cmdlist {
1633 my ($ruleset, $verbose) = @_;
1635 my $cmdlist = "*filter
\n"; # we pass this to iptables-restore;
1637 my $statushash = get_ruleset_status($ruleset, $verbose);
1639 # create missing chains first
1640 foreach my $chain (sort keys %$ruleset) {
1641 my $stat = $statushash->{$chain};
1642 die "internal error
" if !$stat;
1643 next if $stat->{action} ne 'create';
1645 $cmdlist .= ":$chain - [0:0]\n";
1648 my $rule = "INPUT
-j PVEFW-INPUT
";
1649 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1650 $cmdlist .= "-A
$rule\n";
1652 $rule = "OUTPUT
-j PVEFW-OUTPUT
";
1653 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1654 $cmdlist .= "-A
$rule\n";
1657 $rule = "FORWARD
-j PVEFW-FORWARD
";
1658 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1659 $cmdlist .= "-A
$rule\n";
1662 foreach my $chain (sort keys %$ruleset) {
1663 my $stat = $statushash->{$chain};
1664 die "internal error
" if !$stat;
1666 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
1667 $cmdlist .= "-F
$chain\n";
1668 foreach my $cmd (@{$ruleset->{$chain}}) {
1669 $cmdlist .= "$cmd\n";
1671 $cmdlist .= print_sig_rule($chain, $stat->{sig});
1672 } elsif ($stat->{action} eq 'delete') {
1673 die "internal error
"; # this should not happen
1674 } elsif ($stat->{action} eq 'exists') {
1677 die "internal error
- unknown status
'$stat->{action}'";
1681 foreach my $chain (keys %$statushash) {
1682 next if $statushash->{$chain}->{action} ne 'delete';
1683 $cmdlist .= "-F
$chain\n";
1685 foreach my $chain (keys %$statushash) {
1686 next if $statushash->{$chain}->{action} ne 'delete';
1687 next if $chain eq 'PVEFW-INPUT';
1688 next if $chain eq 'PVEFW-OUTPUT';
1689 next if $chain eq 'PVEFW-FORWARD';
1690 $cmdlist .= "-X
$chain\n";
1693 $cmdlist .= "COMMIT
\n";
1699 my ($ruleset, $verbose) = @_;
1701 enable_bridge_firewall();
1703 my $cmdlist = get_rulset_cmdlist($ruleset, $verbose);
1705 print $cmdlist if $verbose;
1707 iptables_restore_cmdlist($cmdlist);
1709 # test: re-read status and check if everything is up to date
1710 my $statushash = get_ruleset_status($ruleset);
1713 foreach my $chain (sort keys %$ruleset) {
1714 my $stat = $statushash->{$chain};
1715 if ($stat->{action} ne 'exists') {
1716 warn "unable to update chain
'$chain'\n";
1721 die "unable to apply firewall changes
\n" if $errors;
1724 sub update_nf_conntrack_max {
1725 my ($hostfw_conf) = @_;
1727 my $max = 65536; # reasonable default
1729 my $options = $hostfw_conf->{options} || {};
1731 if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
1732 $max = $options->{nf_conntrack_max};
1733 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
1736 my $filename_nf_conntrack_max = "/proc/sys
/net/nf_conntrack_max
";
1737 my $filename_hashsize = "/sys/module
/nf_conntrack/parameters
/hashsize
";
1739 my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
1741 if ($current != $max) {
1742 my $hashsize = int($max/4);
1743 PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
1744 PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
1749 my ($start, $verbose) = @_;
1752 my $status = read_pvefw_status();
1754 my ($ruleset, $hostfw_conf) = PVE::Firewall::compile();
1756 update_nf_conntrack_max($hostfw_conf);
1758 if ($start || $status eq 'active') {
1760 save_pvefw_status('active') if ($status ne 'active');
1762 PVE::Firewall::apply_ruleset($ruleset, $verbose);
1764 print "Firewall
not active
(status
= $status)\n" if $verbose;