15 use PVE
::Tools
qw(run_command lock_file);
17 # dynamically include PVE::QemuServer and PVE::OpenVZ
18 # to avoid dependency problems
21 require PVE
::QemuServer
;
22 $have_qemu_server = 1;
28 $have_pve_manager = 1;
33 # fixme: remove loglevel settings? NFLOG does not have --loglevel
35 my $nodename = PVE
::INotify
::nodename
();
37 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
38 my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
40 my $default_log_level = 'info';
42 my $log_level_hash = {
53 # imported/converted from: /usr/share/shorewall/macro.*
56 { action
=> 'PARAM', proto
=> 'udp', dport
=> '10080' },
57 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10080' },
60 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '113' },
63 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '179' },
66 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6889' },
67 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
70 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6999' },
71 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
74 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2401' },
77 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1494' },
78 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1604' },
79 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2598' },
82 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3689' },
83 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3689' },
86 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6277' },
89 { action
=> 'PARAM', proto
=> 'udp', dport
=> '67:68', sport
=> '67:68' },
90 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '67:68', sport
=> '67:68' },
93 { action
=> 'PARAM', proto
=> 'udp', dport
=> '53' },
94 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '53' },
97 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3632' },
100 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '4662' },
101 { action
=> 'PARAM', proto
=> 'udp', dport
=> '4665' },
104 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '21' },
107 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '79' },
110 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2086' },
111 { action
=> 'PARAM', proto
=> 'udp', dport
=> '2086' },
112 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1080' },
113 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1080' },
116 { action
=> 'PARAM', proto
=> '47' },
117 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '47' },
120 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9418' },
123 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6346' },
124 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6346' },
127 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '11371' },
130 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
133 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
136 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3130' },
139 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5190' },
142 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '143' },
145 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '993' },
148 { action
=> 'PARAM', proto
=> '94' },
149 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '94' },
152 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '631' },
155 { action
=> 'PARAM', proto
=> 'udp', dport
=> '631' },
158 { action
=> 'PARAM', source
=> 'SOURCE', dest
=> 'DEST', proto
=> 'tcp', dport
=> '631' },
159 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '631' },
162 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
163 { action
=> 'PARAM', proto
=> '50' },
164 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '500', sport
=> '500' },
165 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '50' },
168 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
169 { action
=> 'PARAM', proto
=> '51' },
170 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '500', sport
=> '500' },
171 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '51' },
174 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500' },
175 { action
=> 'PARAM', proto
=> 'udp', dport
=> '4500' },
176 { action
=> 'PARAM', proto
=> '50' },
177 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '500' },
178 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '4500' },
179 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '50' },
182 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6667' },
185 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5222' },
188 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5223' },
191 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5269' },
194 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9100' },
197 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1701' },
198 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '1701' },
201 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '389' },
204 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '636' },
207 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1863' },
210 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1433' },
213 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
214 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
215 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
218 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '4949' },
221 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3306' },
224 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '119' },
227 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '563' },
230 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
233 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
234 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '123' },
237 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
238 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '123' },
241 { action
=> 'PARAM', proto
=> '89' },
244 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1194' },
247 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5632' },
248 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5631' },
251 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '110' },
254 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '995' },
257 { action
=> 'PARAM', proto
=> '47' },
258 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '47' },
259 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1723' },
262 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
265 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5432' },
268 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '515' },
271 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3389' },
274 { action
=> 'PARAM', proto
=> 'udp', dport
=> '520' },
275 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '520' },
278 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '953' },
281 { action
=> 'ACCEPT', proto
=> 'tcp', dport
=> '2703' },
284 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
287 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '873' },
290 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6566' },
293 { action
=> 'PARAM', proto
=> 'udp', dport
=> '135,445' },
294 { action
=> 'PARAM', proto
=> 'udp', dport
=> '137:139' },
295 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
296 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '135,139,445' },
299 { action
=> 'PARAM', proto
=> 'udp', dport
=> '135,445' },
300 { action
=> 'PARAM', proto
=> 'udp', dport
=> '137:139' },
301 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
302 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '135,139,445' },
303 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '135,445' },
304 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '137:139' },
305 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
306 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'tcp', dport
=> '135,139,445' },
309 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '901' },
312 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
315 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
318 { action
=> 'PARAM', proto
=> 'udp', dport
=> '161:162' },
319 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '161' },
322 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '783' },
325 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '22' },
328 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3690' },
331 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3874' },
332 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3740' },
333 { action
=> 'PARAM', proto
=> '41' },
334 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5072,8374' },
337 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3128' },
340 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
343 { action
=> 'PARAM', proto
=> 'udp', dport
=> '514' },
344 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '514' },
347 { action
=> 'PARAM', proto
=> 'udp', dport
=> '69' },
350 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '23' },
353 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '992' },
356 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
359 { action
=> 'PARAM', proto
=> 'udp', dport
=> '33434:33524' },
360 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
363 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5900:5909' },
366 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5500' },
369 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
370 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
373 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '8080' },
376 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10000' },
379 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '43' },
383 my $pve_fw_parsed_macros;
384 my $pve_fw_preferred_macro_names = {};
386 my $pve_std_chains = {
387 'PVEFW-SET-ACCEPT-MARK' => [
388 "-j MARK --set-mark 1",
390 'PVEFW-DropBroadcast' => [
391 # same as shorewall 'Broadcast'
392 # simply DROP BROADCAST/MULTICAST/ANYCAST
393 # we can use this to reduce logging
394 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
395 { action
=> 'DROP', dsttype
=> 'MULTICAST' },
396 { action
=> 'DROP', dsttype
=> 'ANYCAST' },
397 { action
=> 'DROP', dest
=> '224.0.0.0/4' },
400 # same as shorewall 'reject'
401 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
402 { action
=> 'DROP', source
=> '224.0.0.0/4' },
403 { action
=> 'DROP', proto
=> 'icmp' },
404 "-p tcp -j REJECT --reject-with tcp-reset",
405 "-p udp -j REJECT --reject-with icmp-port-unreachable",
406 "-p icmp -j REJECT --reject-with icmp-host-unreachable",
407 "-j REJECT --reject-with icmp-host-prohibited",
410 # same as shorewall 'Drop', which is equal to DROP,
411 # but REJECT/DROP some packages to reduce logging,
412 # and ACCEPT critical ICMP types
413 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
414 # we are not interested in BROADCAST/MULTICAST/ANYCAST
415 { action
=> 'PVEFW-DropBroadcast' },
416 # ACCEPT critical ICMP types
417 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
418 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
419 # Drop packets with INVALID state
420 "-m conntrack --ctstate INVALID -j DROP",
421 # Drop Microsoft SMB noise
422 { action
=> 'DROP', proto
=> 'udp', dport
=> '135,445', nbdport
=> 2 },
423 { action
=> 'DROP', proto
=> 'udp', dport
=> '137:139'},
424 { action
=> 'DROP', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
425 { action
=> 'DROP', proto
=> 'tcp', dport
=> '135,139,445', nbdport
=> 3 },
426 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
427 # Drop new/NotSyn traffic so that it doesn't get logged
428 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
430 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
433 # same as shorewall 'Reject', which is equal to Reject,
434 # but REJECT/DROP some packages to reduce logging,
435 # and ACCEPT critical ICMP types
436 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
437 # we are not interested in BROADCAST/MULTICAST/ANYCAST
438 { action
=> 'PVEFW-DropBroadcast' },
439 # ACCEPT critical ICMP types
440 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
441 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
442 # Drop packets with INVALID state
443 "-m conntrack --ctstate INVALID -j DROP",
444 # Drop Microsoft SMB noise
445 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '135,445', nbdport
=> 2 },
446 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '137:139'},
447 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
448 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '135,139,445', nbdport
=> 3 },
449 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
450 # Drop new/NotSyn traffic so that it doesn't get logged
451 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
453 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
455 'PVEFW-tcpflags' => [
456 # same as shorewall tcpflags action.
457 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
458 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
459 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
460 "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
461 "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
462 "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
465 # same as shorewall smurfs action
466 # Filter packets for smurfs (packets with a broadcast address as the source).
467 "-s 0.0.0.0/32 -j RETURN",
468 "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
469 "-s 224.0.0.0/4 -g PVEFW-smurflog",
473 # iptables -p icmp -h
474 my $icmp_type_names = {
477 'destination-unreachable' => 1,
478 'network-unreachable' => 1,
479 'host-unreachable' => 1,
480 'protocol-unreachable' => 1,
481 'port-unreachable' => 1,
482 'fragmentation-needed' => 1,
483 'source-route-failed' => 1,
484 'network-unknown' => 1,
486 'network-prohibited' => 1,
487 'host-prohibited' => 1,
488 'TOS-network-unreachable' => 1,
489 'TOS-host-unreachable' => 1,
490 'communication-prohibited' => 1,
491 'host-precedence-violation' => 1,
492 'precedence-cutoff' => 1,
493 'source-quench' => 1,
495 'network-redirect' => 1,
496 'host-redirect' => 1,
497 'TOS-network-redirect' => 1,
498 'TOS-host-redirect' => 1,
500 'router-advertisement' => 1,
501 'router-solicitation' => 1,
502 'time-exceeded' => 1,
503 'ttl-zero-during-transit' => 1,
504 'ttl-zero-during-reassembly' => 1,
505 'parameter-problem' => 1,
506 'ip-header-bad' => 1,
507 'required-option-missing' => 1,
508 'timestamp-request' => 1,
509 'timestamp-reply' => 1,
510 'address-mask-request' => 1,
511 'address-mask-reply' => 1,
514 sub get_firewall_macros
{
516 return $pve_fw_parsed_macros if $pve_fw_parsed_macros;
518 $pve_fw_parsed_macros = {};
520 foreach my $k (keys %$pve_fw_macros) {
523 my $macro = $pve_fw_macros->{$k};
524 $pve_fw_preferred_macro_names->{$name} = $k;
525 $pve_fw_parsed_macros->{$name} = $macro;
528 return $pve_fw_parsed_macros;
533 sub get_etc_services
{
535 return $etc_services if $etc_services;
537 my $filename = "/etc/services";
539 my $fh = IO
::File-
>new($filename, O_RDONLY
);
541 warn "unable to read '$filename' - $!\n";
547 while (my $line = <$fh>) {
549 next if $line =~m/^#/;
550 next if ($line =~m/^\s*$/);
552 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
553 $services->{byid
}->{$2}->{name
} = $1;
554 $services->{byid
}->{$2}->{port
} = $2;
555 $services->{byid
}->{$2}->{$3} = 1;
556 $services->{byname
}->{$1} = $services->{byid
}->{$2};
562 $etc_services = $services;
565 return $etc_services;
570 sub get_etc_protocols
{
571 return $etc_protocols if $etc_protocols;
573 my $filename = "/etc/protocols";
575 my $fh = IO
::File-
>new($filename, O_RDONLY
);
577 warn "unable to read '$filename' - $!\n";
583 while (my $line = <$fh>) {
585 next if $line =~m/^#/;
586 next if ($line =~m/^\s*$/);
588 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
589 $protocols->{byid
}->{$2}->{name
} = $1;
590 $protocols->{byname
}->{$1} = $protocols->{byid
}->{$2};
596 $etc_protocols = $protocols;
598 return $etc_protocols;
601 sub parse_address_list
{
605 foreach my $aor (split(/,/, $str)) {
606 if (!Net
::IP-
>new($aor)) {
607 my $err = Net
::IP
::Error
();
608 die "invalid IP address: $err\n";
616 sub parse_port_name_number_or_range
{
619 my $services = PVE
::Firewall
::get_etc_services
();
621 foreach my $item (split(/,/, $str)) {
625 foreach my $pon (split(':', $item, 2)) {
626 $pon = $services->{byname
}->{$pon}->{port
} if $services->{byname
}->{$pon}->{port
};
627 if ($pon =~ m/^\d+$/){
628 die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535;
629 die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon);
632 die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname
}->{$pon};
640 my $bridge_firewall_enabled = 0;
642 sub enable_bridge_firewall
{
644 return if $bridge_firewall_enabled; # only once
646 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
647 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
649 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
650 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/ipv4/tcp_syncookies", "1");
652 $bridge_firewall_enabled = 1;
655 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
660 run_command
("/sbin/iptables $cmd", outfunc
=> sub {}, errfunc
=> sub {});
663 sub iptables_restore_cmdlist
{
666 run_command
("/sbin/iptables-restore -n", input
=> $cmdlist);
669 sub iptables_get_chains
{
673 # check what chains we want to track
674 my $is_pvefw_chain = sub {
677 return 1 if $name =~ m/^PVEFW-\S+$/;
679 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
681 return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
683 return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
685 return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT)$/;
686 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
696 return if $line =~ m/^#/;
697 return if $line =~ m/^\s*$/;
699 if ($line =~ m/^\*(\S+)$/) {
704 return if $table ne 'filter';
706 if ($line =~ m/^:(\S+)\s/) {
708 return if !&$is_pvefw_chain($chain);
709 $res->{$chain} = "unknown";
710 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
711 my ($chain, $sig) = ($1, $2);
712 return if !&$is_pvefw_chain($chain);
713 $res->{$chain} = $sig;
715 # simply ignore the rest
720 run_command
("/sbin/iptables-save", outfunc
=> $parser);
725 sub iptables_chain_exist
{
729 iptables
("-n --list $chain");
736 sub iptables_rule_exist
{
740 iptables
("-C $rule");
747 sub ruleset_generate_cmdstr
{
748 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
750 return if $rule->{disable
};
754 push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in
};
755 push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out
};
757 push @cmd, "-m iprange --src-range" if $rule->{nbsource
} && $rule->{nbsource
} > 1;
758 push @cmd, "-s $rule->{source}" if $rule->{source
};
759 push @cmd, "-m iprange --dst-range" if $rule->{nbdest
} && $rule->{nbdest
} > 1;
760 push @cmd, "-d $rule->{dest}" if $rule->{dest
};
762 if ($rule->{proto
}) {
763 push @cmd, "-p $rule->{proto}";
766 $multiport++ if $rule->{nbdport
} && ($rule->{nbdport
} > 1);
767 $multiport++ if $rule->{nbsport
} && ($rule->{nbsport
} > 1);
769 push @cmd, "--match multiport" if $multiport;
771 die "multiport: option '--sports' cannot be used together with '--dports'\n"
772 if ($multiport == 2) && ($rule->{dport
} ne $rule->{sport
});
774 if ($rule->{dport
}) {
775 if ($rule->{proto
} && $rule->{proto
} eq 'icmp') {
776 # Note: we use dport to store --icmp-type
777 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport
}});
778 push @cmd, "-m icmp --icmp-type $rule->{dport}";
780 if ($rule->{nbdport
} && $rule->{nbdport
} > 1) {
781 if ($multiport == 2) {
782 push @cmd, "--ports $rule->{dport}";
784 push @cmd, "--dports $rule->{dport}";
787 push @cmd, "--dport $rule->{dport}";
792 if ($rule->{sport
}) {
793 if ($rule->{nbsport
} && $rule->{nbsport
} > 1) {
794 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
796 push @cmd, "--sport $rule->{sport}";
799 } elsif ($rule->{dport
} || $rule->{sport
}) {
800 warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport
};
801 warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport
};
804 push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype
};
806 if (my $action = $rule->{action
}) {
807 $action = $actions->{$action} if defined($actions->{$action});
808 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
809 push @cmd, $goto ?
"-g $action" : "-j $action";
812 return scalar(@cmd) ?
join(' ', @cmd) : undef;
815 sub ruleset_generate_rule
{
816 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
818 if (my $cmdstr = ruleset_generate_cmdstr
($ruleset, $chain, $rule, $actions, $goto)) {
819 ruleset_addrule
($ruleset, $chain, $cmdstr);
822 sub ruleset_generate_rule_insert
{
823 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
825 if (my $cmdstr = ruleset_generate_cmdstr
($ruleset, $chain, $rule, $actions, $goto)) {
826 ruleset_insertrule
($ruleset, $chain, $cmdstr);
830 sub ruleset_create_chain
{
831 my ($ruleset, $chain) = @_;
833 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
834 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
836 die "chain '$chain' already exists\n" if $ruleset->{$chain};
838 $ruleset->{$chain} = [];
841 sub ruleset_chain_exist
{
842 my ($ruleset, $chain) = @_;
844 return $ruleset->{$chain} ?
1 : undef;
847 sub ruleset_addrule
{
848 my ($ruleset, $chain, $rule) = @_;
850 die "no such chain '$chain'\n" if !$ruleset->{$chain};
852 push @{$ruleset->{$chain}}, "-A $chain $rule";
855 sub ruleset_insertrule
{
856 my ($ruleset, $chain, $rule) = @_;
858 die "no such chain '$chain'\n" if !$ruleset->{$chain};
860 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
863 sub get_log_rule_base
{
864 my ($chain, $vmid, $msg, $loglevel) = @_;
866 die "internal error - no log level" if !defined($loglevel);
868 $vmid = 0 if !defined($vmid);
870 # Note: we use special format for prefix to pass further
871 # info to log daemon (VMID, LOGVELEL and CHAIN)
873 return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
877 my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
879 return if !defined($loglevel);
881 my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
883 $logrule = "$rule $logrule" if defined($rule);
885 ruleset_addrule($ruleset, $chain, $logrule)
888 sub generate_bridge_chains {
889 my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_;
891 my $options = $hostfw_conf->{options} || {};
893 die "error
: detected direct route to bridge
'$bridge'\n"
894 if !$options->{allow_bridge_route} && $routing_table->{$bridge};
896 if (!ruleset_chain_exist($ruleset, "$bridge-FW
")) {
897 ruleset_create_chain($ruleset, "$bridge-FW
");
898 ruleset_addrule($ruleset, "PVEFW-FORWARD
", "-o
$bridge -m physdev
--physdev-is-out
-j
$bridge-FW
");
899 ruleset_addrule($ruleset, "PVEFW-FORWARD
", "-i
$bridge -m physdev
--physdev-is-in
-j
$bridge-FW
");
902 if (!ruleset_chain_exist($ruleset, "$bridge-OUT
")) {
903 ruleset_create_chain($ruleset, "$bridge-OUT
");
904 ruleset_addrule($ruleset, "$bridge-FW
", "-m physdev
--physdev-is-in
-j
$bridge-OUT
");
905 ruleset_insertrule($ruleset, "PVEFW-INPUT
", "-i
$bridge -m physdev
--physdev-is-in
-j
$bridge-OUT
");
908 if (!ruleset_chain_exist($ruleset, "$bridge-IN
")) {
909 ruleset_create_chain($ruleset, "$bridge-IN
");
910 ruleset_addrule($ruleset, "$bridge-FW
", "-m physdev
--physdev-is-out
-j
$bridge-IN
");
911 ruleset_addrule($ruleset, "$bridge-FW
", "-m mark
--mark
1 -j ACCEPT
");
912 # accept traffic to unmanaged bridge ports
913 ruleset_addrule($ruleset, "$bridge-FW
", "-m physdev
--physdev-is-out
-j ACCEPT
");
917 sub ruleset_add_chain_policy {
918 my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
920 if ($policy eq 'ACCEPT') {
922 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
923 { ACCEPT => $accept_action});
925 } elsif ($policy eq 'DROP') {
927 ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop
");
929 ruleset_addlog($ruleset, $chain, $vmid, "policy
$policy: ", $loglevel);
931 ruleset_addrule($ruleset, $chain, "-j DROP
");
932 } elsif ($policy eq 'REJECT') {
933 ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject
");
935 ruleset_addlog($ruleset, $chain, $vmid, "policy
$policy: ", $loglevel);
937 ruleset_addrule($ruleset, $chain, "-g PVEFW-reject
");
940 die "internal error
: unknown policy
'$policy'";
944 sub ruleset_create_vm_chain {
945 my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
947 ruleset_create_chain($ruleset, $chain);
949 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
950 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
,NEW
-j PVEFW-smurfs
");
953 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
954 ruleset_addrule($ruleset, $chain, "-p udp
-m udp
--dport
67:68 -j ACCEPT
");
957 if ($options->{tcpflags}) {
958 ruleset_addrule($ruleset, $chain, "-p tcp
-j PVEFW-tcpflags
");
961 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
-j DROP
");
962 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
-j ACCEPT
");
964 if ($direction eq 'OUT') {
965 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
966 ruleset_addrule($ruleset, $chain, "-m mac
! --mac-source
$macaddr -j DROP
");
968 ruleset_addrule($ruleset, $chain, "-j MARK
--set-mark
0"); # clear mark
972 sub ruleset_generate_vm_rules {
973 my ($ruleset, $rules, $groups_conf, $chain, $netid, $direction) = @_;
975 my $lc_direction = lc($direction);
977 foreach my $rule (@$rules) {
978 next if $rule->{iface} && $rule->{iface} ne $netid;
979 next if $rule->{disable};
980 if ($rule->{type} eq 'group') {
981 my $group_chain = "GROUP-
$rule->{action
}-$direction";
982 if(!ruleset_chain_exist($ruleset, $group_chain)){
983 generate_group_rules($ruleset, $groups_conf, $rule->{action});
985 ruleset_addrule($ruleset, $chain, "-j
$group_chain");
986 ruleset_addrule($ruleset, $chain, "-m mark
--mark
1 -j RETURN
")
987 if $direction eq 'OUT';
989 next if $rule->{type} ne $lc_direction;
990 if ($direction eq 'OUT') {
991 ruleset_generate_rule($ruleset, $chain, $rule,
992 { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" });
994 ruleset_generate_rule($ruleset, $chain, $rule, { REJECT => "PVEFW-reject
" });
1000 sub generate_venet_rules_direction {
1001 my ($ruleset, $groups_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1003 parse_address_list($ip); # make sure we have a valid $ip list
1005 my $lc_direction = lc($direction);
1007 my $rules = $vmfw_conf->{rules};
1009 my $options = $vmfw_conf->{options};
1010 my $loglevel = get_option_log_level($options, "log_level_
${lc_direction
}");
1012 my $chain = "venet0-
$vmid-$direction";
1014 ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1016 ruleset_generate_vm_rules($ruleset, $rules, $groups_conf, $chain, 'venet', $direction);
1021 if ($direction eq 'OUT') {
1022 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1024 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1027 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : "ACCEPT
";
1028 ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1030 # plug into FORWARD, INPUT and OUTPUT chain
1031 if ($direction eq 'OUT') {
1032 ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD
", {
1035 iface_in => 'venet0'});
1037 ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT
", {
1040 iface_in => 'venet0'});
1042 ruleset_generate_rule($ruleset, "PVEFW-FORWARD
", {
1045 iface_out => 'venet0'});
1047 ruleset_generate_rule($ruleset, "PVEFW-OUTPUT
", {
1050 iface_out => 'venet0'});
1054 sub generate_tap_rules_direction {
1055 my ($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_;
1057 my $lc_direction = lc($direction);
1059 my $rules = $vmfw_conf->{rules};
1061 my $options = $vmfw_conf->{options};
1062 my $loglevel = get_option_log_level($options, "log_level_
${lc_direction
}");
1064 my $tapchain = "$iface-$direction";
1066 ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1068 ruleset_generate_vm_rules($ruleset, $rules, $groups_conf, $tapchain, $netid, $direction);
1073 if ($direction eq 'OUT') {
1074 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1076 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1079 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : "ACCEPT
";
1080 ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1082 # plug the tap chain to bridge chain
1083 if ($direction eq 'IN') {
1084 ruleset_insertrule($ruleset, "$bridge-IN
",
1085 "-m physdev
--physdev-is-bridged
--physdev-out
$iface -j
$tapchain");
1087 ruleset_insertrule($ruleset, "$bridge-OUT
",
1088 "-m physdev
--physdev-in
$iface -j
$tapchain");
1092 sub enable_host_firewall {
1093 my ($ruleset, $hostfw_conf, $groups_conf) = @_;
1095 # fixme: allow security groups
1097 my $options = $hostfw_conf->{options};
1098 my $rules = $hostfw_conf->{rules};
1100 # host inbound firewall
1101 my $chain = "PVEFW-HOST-IN
";
1102 ruleset_create_chain($ruleset, $chain);
1104 my $loglevel = get_option_log_level($options, "log_level_in
");
1106 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
-j DROP
");
1107 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
-j ACCEPT
");
1108 ruleset_addrule($ruleset, $chain, "-i lo
-j ACCEPT
");
1109 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
-j ACCEPT
");
1110 ruleset_addrule($ruleset, $chain, "-p udp
-m conntrack
--ctstate NEW
--dport
5404:5405 -j ACCEPT
");
1111 ruleset_addrule($ruleset, $chain, "-p udp
-m udp
--dport
9000 -j ACCEPT
"); #corosync
1113 # we use RETURN because we need to check also tap rules
1114 my $accept_action = 'RETURN';
1116 foreach my $rule (@$rules) {
1117 next if $rule->{type} ne 'in';
1118 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" });
1121 # implement input policy
1122 my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1123 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1125 # host outbound firewall
1126 $chain = "PVEFW-HOST-OUT
";
1127 ruleset_create_chain($ruleset, $chain);
1129 $loglevel = get_option_log_level($options, "log_level_out
");
1131 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
-j DROP
");
1132 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
-j ACCEPT
");
1133 ruleset_addrule($ruleset, $chain, "-o lo
-j ACCEPT
");
1134 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
-j ACCEPT
");
1135 ruleset_addrule($ruleset, $chain, "-p udp
-m conntrack
--ctstate NEW
--dport
5404:5405 -j ACCEPT
");
1136 ruleset_addrule($ruleset, $chain, "-p udp
-m udp
--dport
9000 -j ACCEPT
"); #corosync
1138 # we use RETURN because we may want to check other thigs later
1139 $accept_action = 'RETURN';
1141 foreach my $rule (@$rules) {
1142 next if $rule->{type} ne 'out';
1143 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" });
1146 # implement output policy
1147 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1148 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1150 ruleset_addrule($ruleset, "PVEFW-OUTPUT
", "-j PVEFW-HOST-OUT
");
1151 ruleset_addrule($ruleset, "PVEFW-INPUT
", "-j PVEFW-HOST-IN
");
1154 sub generate_group_rules {
1155 my ($ruleset, $groups_conf, $group) = @_;
1157 die "no such security group
'$group'\n" if !$groups_conf->{$group};
1159 my $rules = $groups_conf->{$group}->{rules};
1161 my $chain = "GROUP-
${group
}-IN
";
1163 ruleset_create_chain($ruleset, $chain);
1165 foreach my $rule (@$rules) {
1166 next if $rule->{type} ne 'in';
1167 ruleset_generate_rule($ruleset, $chain, $rule, { REJECT => "PVEFW-reject
" });
1170 $chain = "GROUP-
${group
}-OUT
";
1172 ruleset_create_chain($ruleset, $chain);
1173 ruleset_addrule($ruleset, $chain, "-j MARK
--set-mark
0"); # clear mark
1175 foreach my $rule (@$rules) {
1176 next if $rule->{type} ne 'out';
1177 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1178 # check also other tap rules later
1179 ruleset_generate_rule($ruleset, $chain, $rule,
1180 { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject
" });
1185 my $valid_netdev_names = {};
1186 for (my $i = 0; $i < $MAX_NETS; $i++) {
1187 $valid_netdev_names->{"net
$i"} = 1;
1191 my ($line, $need_iface, $allow_groups) = @_;
1193 my $macros = get_firewall_macros();
1194 my $protocols = get_etc_protocols();
1196 my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
1198 # we can add single line comments to the end of the rule
1199 my $comment = $1 if $line =~ s/#\s*(.*?)\s*$//;
1201 # we can disable a rule when prefixed with '|'
1202 my $disable = 1 if $line =~ s/^\|//;
1204 my @data = split(/\s+/, $line);
1205 my $expected_elements = $need_iface ? 8 : 7;
1207 die "wrong number of rule elements
\n" if scalar(@data) > $expected_elements;
1210 ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
1212 ($type, $action, $source, $dest, $proto, $dport, $sport) = @data;
1215 die "incomplete rule
\n" if ! ($type && $action);
1222 if ($type eq 'in' || $type eq 'out') {
1223 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1225 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1226 ($macro_name, $action) = ($1, $2);
1227 my $lc_macro_name = lc($macro_name);
1228 my $preferred_name = $pve_fw_preferred_macro_names->{$lc_macro_name};
1229 $macro_name = $preferred_name if $preferred_name;
1230 $macro = $macros->{$lc_macro_name};
1231 die "unknown
macro '$macro_name'\n" if !$macro;
1233 die "unknown action
'$action'\n";
1235 } elsif ($type eq 'group') {
1236 die "wrong number of rule elements
\n" if scalar(@data) != 3;
1237 die "groups disabled
\n" if !$allow_groups;
1239 die "invalid characters
in group name
\n" if $action !~ m/^[A-Za-z0-9_\-]+$/;
1241 die "unknown rule type
'$type'\n";
1245 $iface = undef if $iface && $iface eq '-';
1248 $proto = undef if $proto && $proto eq '-';
1249 die "unknown protokol
'$proto'\n" if $proto &&
1250 !(defined($protocols->{byname}->{$proto}) ||
1251 defined($protocols->{byid}->{$proto}));
1253 $source = undef if $source && $source eq '-';
1254 $dest = undef if $dest && $dest eq '-';
1256 $dport = undef if $dport && $dport eq '-';
1257 $sport = undef if $sport && $sport eq '-';
1259 my $nbsource = undef;
1262 $nbsource = parse_address_list($source) if $source;
1263 $nbdest = parse_address_list($dest) if $dest;
1269 disable => $disable,
1270 comment => $comment,
1275 nbsource => $nbsource,
1283 foreach my $templ (@$macro) {
1285 my $param_used = {};
1286 foreach my $k (keys %$templ) {
1287 my $v = $templ->{$k};
1288 if ($v eq 'PARAM') {
1290 $param_used->{$k} = 1;
1291 } elsif ($v eq 'DEST') {
1292 $v = $param->{dest};
1293 $param_used->{dest} = 1;
1294 } elsif ($v eq 'SOURCE') {
1295 $v = $param->{source};
1296 $param_used->{source} = 1;
1299 die "missing parameter
'$k' in macro '$macro_name'\n" if !defined($v);
1302 foreach my $k (keys %$param) {
1303 next if !defined($param->{$k});
1304 next if $param_used->{$k};
1305 if (defined($rule->{$k})) {
1306 die "parameter
'$k' already define
in macro (value
= '$rule->{$k}')\n"
1307 if $rule->{$k} ne $param->{$k};
1309 $rule->{$k} = $param->{$k};
1312 push @$rules, $rule;
1315 push @$rules, $param;
1318 foreach my $rule (@$rules) {
1319 $rule->{nbdport} = parse_port_name_number_or_range($rule->{dport})
1320 if defined($rule->{dport});
1321 $rule->{nbsport} = parse_port_name_number_or_range($rule->{sport})
1322 if defined($rule->{sport});
1328 sub parse_vmfw_option {
1333 my $loglevels = "emerg
|alert
|crit
|err
|warning
|notice
|info
|debug
|nolog
";
1335 if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
1338 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1340 $value = $2 ? lc($3) : '';
1341 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1346 die "can
't parse option '$line'\n"
1349 return ($opt, $value);
1352 sub parse_hostfw_option {
1357 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1359 if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags|allow_bridge_route):\s*(0|1)\s*$/i) {
1362 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1364 $value = $2 ? lc($3) : '';
1365 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1368 } elsif ($line =~ m/^(nf_conntrack_max):\s*(\d+)\s*$/i) {
1373 die "can't parse option
'$line'\n"
1376 return ($opt, $value);
1379 sub parse_vm_fw_rules {
1380 my ($filename, $fh) = @_;
1382 my $res = { rules => [], options => {}};
1386 while (defined(my $line = <$fh>)) {
1387 next if $line =~ m/^#/;
1388 next if $line =~ m/^\s*$/;
1390 my $linenr = $fh->input_line_number();
1391 my $prefix = "$filename (line
$linenr)";
1393 if ($line =~ m/^\[(\S+)\]\s*$/i) {
1395 warn "$prefix: ignore unknown section
'$section'\n" if !$res->{$section};
1399 warn "$prefix: skip line
- no section
";
1403 next if !$res->{$section}; # skip undefined section
1405 if ($section eq 'options') {
1407 my ($opt, $value) = parse_vmfw_option($line);
1408 $res->{options}->{$opt} = $value;
1410 warn "$prefix: $@" if $@;
1415 eval { $rules = parse_fw_rule($line, 1, 1); };
1417 warn "$prefix: $err";
1421 push @{$res->{$section}}, @$rules;
1427 sub parse_host_fw_rules {
1428 my ($filename, $fh) = @_;
1430 my $res = { rules => [], options => {}};
1434 while (defined(my $line = <$fh>)) {
1435 next if $line =~ m/^#/;
1436 next if $line =~ m/^\s*$/;
1438 my $linenr = $fh->input_line_number();
1439 my $prefix = "$filename (line
$linenr)";
1441 if ($line =~ m/^\[(\S+)\]\s*$/i) {
1443 warn "$prefix: ignore unknown section
'$section'\n" if !$res->{$section};
1447 warn "$prefix: skip line
- no section
";
1451 next if !$res->{$section}; # skip undefined section
1453 if ($section eq 'options') {
1455 my ($opt, $value) = parse_hostfw_option($line);
1456 $res->{options}->{$opt} = $value;
1458 warn "$prefix: $@" if $@;
1463 eval { $rules = parse_fw_rule($line, 1, 1); };
1465 warn "$prefix: $err";
1469 push @{$res->{$section}}, @$rules;
1475 sub parse_group_fw_rules {
1476 my ($filename, $fh) = @_;
1481 my $res = { rules => [] };
1483 while (defined(my $line = <$fh>)) {
1484 next if $line =~ m/^#/;
1485 next if $line =~ m/^\s*$/;
1487 my $linenr = $fh->input_line_number();
1488 my $prefix = "$filename (line
$linenr)";
1490 if ($line =~ m/^\[group\s+(\S+)\]\s*$/i) {
1495 if (!$section || !$group) {
1496 warn "$prefix: skip line
- no section
";
1501 eval { $rules = parse_fw_rule($line, 0, 0); };
1503 warn "$prefix: $err";
1507 push @{$res->{$group}->{$section}}, @$rules;
1514 my ($code, @param) = @_;
1518 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
1525 sub read_local_vm_config {
1530 my $vmdata = { openvz => $openvz, qemu => $qemu };
1532 my $vmlist = PVE::Cluster::get_vmlist();
1533 return $vmdata if !$vmlist || !$vmlist->{ids};
1534 my $ids = $vmlist->{ids};
1536 foreach my $vmid (keys %$ids) {
1537 next if !$vmid; # skip VE0
1538 my $d = $ids->{$vmid};
1539 next if !$d->{node} || $d->{node} ne $nodename;
1540 next if !$d->{type};
1541 if ($d->{type} eq 'openvz') {
1542 if ($have_pve_manager) {
1543 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
1544 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1545 $openvz->{$vmid} = $conf;
1548 } elsif ($d->{type} eq 'qemu') {
1549 if ($have_qemu_server) {
1550 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
1551 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1552 $qemu->{$vmid} = $conf;
1561 sub read_vm_firewall_configs {
1563 my $vmfw_configs = {};
1565 foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
1566 my $filename = "/etc/pve
/firewall/$vmid.fw
";
1567 my $fh = IO::File->new($filename, O_RDONLY);
1570 $vmfw_configs->{$vmid} = parse_vm_fw_rules($filename, $fh);
1573 return $vmfw_configs;
1576 sub get_option_log_level {
1577 my ($options, $k) = @_;
1579 my $v = $options->{$k};
1580 $v = $default_log_level if !defined($v);
1582 return undef if $v eq '' || $v eq 'nolog';
1584 $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
1586 return $v if ($v >= 0) && ($v <= 7);
1588 warn "unknown
log level
($k = '$v')\n";
1593 sub generate_std_chains {
1594 my ($ruleset, $options) = @_;
1596 my $loglevel = get_option_log_level($options, 'smurf_log_level');
1598 # same as shorewall smurflog.
1599 my $chain = 'PVEFW-smurflog';
1601 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP
: ", $loglevel) if $loglevel;
1602 push @{$pve_std_chains->{$chain}}, "-j DROP
";
1604 # same as shorewall logflags action.
1605 $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
1606 $chain = 'PVEFW-logflags';
1607 # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
1608 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP
: ", $loglevel) if $loglevel;
1609 push @{$pve_std_chains->{$chain}}, "-j DROP
";
1611 foreach my $chain (keys %$pve_std_chains) {
1612 ruleset_create_chain($ruleset, $chain);
1613 foreach my $rule (@{$pve_std_chains->{$chain}}) {
1615 ruleset_generate_rule($ruleset, $chain, $rule);
1617 ruleset_addrule($ruleset, $chain, $rule);
1623 sub save_pvefw_status {
1626 die "unknown status
'$status' - internal error
"
1627 if $status !~ m/^(stopped|active)$/;
1629 mkdir dirname($pve_fw_status_filename);
1630 PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
1633 sub read_pvefw_status {
1635 my $status = 'unknown';
1637 return 'stopped' if ! -f $pve_fw_status_filename;
1640 $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
1647 # fixme: move to pve-common PVE::ProcFSTools
1648 sub read_proc_net_route {
1649 my $filename = "/proc/net
/route
";
1653 my $fh = IO::File->new ($filename, "r
");
1654 return $res if !$fh;
1656 my $int_to_quad = sub {
1657 return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
1660 while (defined(my $line = <$fh>)) {
1661 next if $line =~/^Iface\s+Destination/; # skip head
1662 my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
1663 push @{$res->{$iface}}, {
1664 dest => &$int_to_quad(hex($dest)),
1665 gateway => &$int_to_quad(hex($gateway)),
1666 mask => &$int_to_quad(hex($mask)),
1676 my $vmdata = read_local_vm_config();
1677 my $vmfw_configs = read_vm_firewall_configs($vmdata);
1679 my $routing_table = read_proc_net_route();
1681 my $groups_conf = {};
1682 my $filename = "/etc/pve
/firewall/groups
.fw
";
1683 if (my $fh = IO::File->new($filename, O_RDONLY)) {
1684 $groups_conf = parse_group_fw_rules($filename, $fh);
1689 ruleset_create_chain($ruleset, "PVEFW-INPUT
");
1690 ruleset_create_chain($ruleset, "PVEFW-OUTPUT
");
1692 ruleset_create_chain($ruleset, "PVEFW-FORWARD
");
1694 my $hostfw_options = {};
1695 my $hostfw_conf = {};
1697 $filename = "/etc/pve
/local/host
.fw
";
1698 if (my $fh = IO::File->new($filename, O_RDONLY)) {
1699 $hostfw_conf = parse_host_fw_rules($filename, $fh);
1700 $hostfw_options = $hostfw_conf->{options};
1703 generate_std_chains($ruleset, $hostfw_options);
1705 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
1707 enable_host_firewall($ruleset, $hostfw_conf, $groups_conf) if $hostfw_enable;
1709 # generate firewall rules for QEMU VMs
1710 foreach my $vmid (keys %{$vmdata->{qemu}}) {
1711 my $conf = $vmdata->{qemu}->{$vmid};
1712 my $vmfw_conf = $vmfw_configs->{$vmid};
1713 next if !$vmfw_conf;
1714 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
1716 foreach my $netid (keys %$conf) {
1717 next if $netid !~ m/^net(\d+)$/;
1718 my $net = PVE::QemuServer::parse_net($conf->{$netid});
1720 my $iface = "tap
${vmid
}i
$1";
1722 my $bridge = $net->{bridge};
1723 next if !$bridge; # fixme: ?
1725 $bridge .= "v
$net->{tag
}" if $net->{tag};
1727 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
1729 my $macaddr = $net->{macaddr};
1730 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr,
1731 $vmfw_conf, $vmid, $bridge, 'IN');
1732 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr,
1733 $vmfw_conf, $vmid, $bridge, 'OUT');
1737 # generate firewall rules for OpenVZ containers
1738 foreach my $vmid (keys %{$vmdata->{openvz}}) {
1739 my $conf = $vmdata->{openvz}->{$vmid};
1741 my $vmfw_conf = $vmfw_configs->{$vmid};
1742 next if !$vmfw_conf;
1743 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
1745 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
1746 my $ip = $conf->{ip_address}->{value};
1747 generate_venet_rules_direction($ruleset, $groups_conf, $vmfw_conf, $vmid, $ip, 'IN');
1748 generate_venet_rules_direction($ruleset, $groups_conf, $vmfw_conf, $vmid, $ip, 'OUT');
1751 if ($conf->{netif} && $conf->{netif}->{value}) {
1752 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
1753 foreach my $netid (keys %$netif) {
1754 my $d = $netif->{$netid};
1755 my $bridge = $d->{bridge};
1757 warn "no bridge device
for CT
$vmid iface
'$netid'\n";
1761 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
1763 my $macaddr = $d->{mac};
1764 my $iface = $d->{host_ifname};
1765 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr,
1766 $vmfw_conf, $vmid, $bridge, 'IN');
1767 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr,
1768 $vmfw_conf, $vmid, $bridge, 'OUT');
1773 # fixme: this is an optimization? if so, we should also drop INVALID packages?
1774 ruleset_insertrule($ruleset, "PVEFW-FORWARD
", "-m conntrack
--ctstate RELATED
,ESTABLISHED
-j ACCEPT
");
1776 # fixme: what log level should we use here?
1777 my $loglevel = get_option_log_level($hostfw_options, "log_level_out
");
1779 # fixme: should we really block inter-bridge traffic?
1781 # always allow traffic from containers?
1782 ruleset_addrule($ruleset, "PVEFW-FORWARD
", "-i venet0
-j RETURN
");
1784 # disable interbridge routing
1785 ruleset_addrule($ruleset, "PVEFW-FORWARD
", "-o vmbr
+ -j PVEFW-Drop
");
1786 ruleset_addrule($ruleset, "PVEFW-FORWARD
", "-i vmbr
+ -j PVEFW-Drop
");
1787 ruleset_addlog($ruleset, "PVEFW-FORWARD
", 0, "DROP
: ", $loglevel, "-o vmbr
+");
1788 ruleset_addlog($ruleset, "PVEFW-FORWARD
", 0, "DROP
: ", $loglevel, "-i vmbr
+");
1789 ruleset_addrule($ruleset, "PVEFW-FORWARD
", "-o vmbr
+ -j DROP
");
1790 ruleset_addrule($ruleset, "PVEFW-FORWARD
", "-i vmbr
+ -j DROP
");
1792 return wantarray ? ($ruleset, $hostfw_conf) : $ruleset;
1795 sub get_ruleset_status {
1796 my ($ruleset, $verbose) = @_;
1798 my $active_chains = iptables_get_chains();
1800 my $statushash = {};
1802 foreach my $chain (sort keys %$ruleset) {
1803 my $digest = Digest::SHA->new('sha1');
1804 foreach my $cmd (@{$ruleset->{$chain}}) {
1805 $digest->add("$cmd\n");
1807 my $sig = $digest->b64digest;
1808 $statushash->{$chain}->{sig} = $sig;
1810 my $oldsig = $active_chains->{$chain};
1811 if (!defined($oldsig)) {
1812 $statushash->{$chain}->{action} = 'create';
1814 if ($oldsig eq $sig) {
1815 $statushash->{$chain}->{action} = 'exists';
1817 $statushash->{$chain}->{action} = 'update';
1820 print "$statushash->{$chain}->{action
} $chain ($sig)\n" if $verbose;
1821 foreach my $cmd (@{$ruleset->{$chain}}) {
1822 print "\t$cmd\n" if $verbose;
1826 foreach my $chain (sort keys %$active_chains) {
1827 if (!defined($ruleset->{$chain})) {
1828 my $sig = $active_chains->{$chain};
1829 $statushash->{$chain}->{action} = 'delete';
1830 $statushash->{$chain}->{sig} = $sig;
1831 print "delete $chain ($sig)\n" if $verbose;
1841 get_ruleset_status($ruleset, 1);
1844 sub print_sig_rule {
1845 my ($chain, $sig) = @_;
1847 # We just use this to store a SHA1 checksum used to detect changes
1848 return "-A
$chain -m comment
--comment
\"PVESIG
:$sig\"\n";
1851 sub get_rulset_cmdlist
{
1852 my ($ruleset, $verbose) = @_;
1854 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
1856 my $statushash = get_ruleset_status
($ruleset, $verbose);
1858 # create missing chains first
1859 foreach my $chain (sort keys %$ruleset) {
1860 my $stat = $statushash->{$chain};
1861 die "internal error" if !$stat;
1862 next if $stat->{action
} ne 'create';
1864 $cmdlist .= ":$chain - [0:0]\n";
1867 my $rule = "INPUT -j PVEFW-INPUT";
1868 if (!PVE
::Firewall
::iptables_rule_exist
($rule)) {
1869 $cmdlist .= "-A $rule\n";
1871 $rule = "OUTPUT -j PVEFW-OUTPUT";
1872 if (!PVE
::Firewall
::iptables_rule_exist
($rule)) {
1873 $cmdlist .= "-A $rule\n";
1876 $rule = "FORWARD -j PVEFW-FORWARD";
1877 if (!PVE
::Firewall
::iptables_rule_exist
($rule)) {
1878 $cmdlist .= "-A $rule\n";
1881 foreach my $chain (sort keys %$ruleset) {
1882 my $stat = $statushash->{$chain};
1883 die "internal error" if !$stat;
1885 if ($stat->{action
} eq 'update' || $stat->{action
} eq 'create') {
1886 $cmdlist .= "-F $chain\n";
1887 foreach my $cmd (@{$ruleset->{$chain}}) {
1888 $cmdlist .= "$cmd\n";
1890 $cmdlist .= print_sig_rule
($chain, $stat->{sig
});
1891 } elsif ($stat->{action
} eq 'delete') {
1892 die "internal error"; # this should not happen
1893 } elsif ($stat->{action
} eq 'exists') {
1896 die "internal error - unknown status '$stat->{action}'";
1900 foreach my $chain (keys %$statushash) {
1901 next if $statushash->{$chain}->{action
} ne 'delete';
1902 $cmdlist .= "-F $chain\n";
1904 foreach my $chain (keys %$statushash) {
1905 next if $statushash->{$chain}->{action
} ne 'delete';
1906 next if $chain eq 'PVEFW-INPUT';
1907 next if $chain eq 'PVEFW-OUTPUT';
1908 next if $chain eq 'PVEFW-FORWARD';
1909 $cmdlist .= "-X $chain\n";
1912 $cmdlist .= "COMMIT\n";
1918 my ($ruleset, $hostfw_conf, $verbose) = @_;
1920 enable_bridge_firewall
();
1922 update_nf_conntrack_max
($hostfw_conf);
1924 my $cmdlist = get_rulset_cmdlist
($ruleset, $verbose);
1926 print $cmdlist if $verbose;
1928 iptables_restore_cmdlist
($cmdlist);
1930 # test: re-read status and check if everything is up to date
1931 my $statushash = get_ruleset_status
($ruleset);
1934 foreach my $chain (sort keys %$ruleset) {
1935 my $stat = $statushash->{$chain};
1936 if ($stat->{action
} ne 'exists') {
1937 warn "unable to update chain '$chain'\n";
1942 die "unable to apply firewall changes\n" if $errors;
1945 sub update_nf_conntrack_max
{
1946 my ($hostfw_conf) = @_;
1948 my $max = 65536; # reasonable default
1950 my $options = $hostfw_conf->{options
} || {};
1952 if (defined($options->{nf_conntrack_max
}) && ($options->{nf_conntrack_max
} > $max)) {
1953 $max = $options->{nf_conntrack_max
};
1954 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
1957 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
1958 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
1960 my $current = int(PVE
::Tools
::file_read_firstline
($filename_nf_conntrack_max) || $max);
1962 if ($current != $max) {
1963 my $hashsize = int($max/4);
1964 PVE
::ProcFSTools
::write_proc_entry
($filename_hashsize, $hashsize);
1965 PVE
::ProcFSTools
::write_proc_entry
($filename_nf_conntrack_max, $max);
1970 my ($start, $verbose) = @_;
1973 my $status = read_pvefw_status
();
1975 my ($ruleset, $hostfw_conf) = PVE
::Firewall
::compile
();
1977 if ($start || $status eq 'active') {
1979 save_pvefw_status
('active') if ($status ne 'active');
1981 apply_ruleset
($ruleset, $hostfw_conf, $verbose);
1983 print "Firewall not active (status = $status)\n" if $verbose;