9 use PVE
::JSONSchema
qw(get_standard_option);
17 use PVE
::Tools
qw(run_command lock_file);
20 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
21 my $clusterfw_conf_filename = "/etc/pve/firewall/cluster.fw";
23 # dynamically include PVE::QemuServer and PVE::OpenVZ
24 # to avoid dependency problems
27 require PVE
::QemuServer
;
28 $have_qemu_server = 1;
34 $have_pve_manager = 1;
37 my $feature_ipset_nomatch = 0;
39 my (undef, undef, $release) = POSIX
::uname
();
40 if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
41 my ($major, $minor) = ($1, $2);
42 $feature_ipset_nomatch = 1 if ($major > 3) ||
43 ($major == 3 && $minor >= 7);
50 my $nodename = PVE
::INotify
::nodename
();
52 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
53 my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
55 my $default_log_level = 'info';
57 my $log_level_hash = {
68 # imported/converted from: /usr/share/shorewall/macro.*
71 { action
=> 'PARAM', proto
=> 'udp', dport
=> '10080' },
72 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10080' },
75 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '113' },
78 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '179' },
81 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6889' },
82 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
85 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6999' },
86 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
89 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2401' },
92 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1494' },
93 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1604' },
94 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2598' },
97 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3689' },
98 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3689' },
101 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6277' },
104 { action
=> 'PARAM', proto
=> 'udp', dport
=> '67:68', sport
=> '67:68' },
105 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '67:68', sport
=> '67:68' },
108 { action
=> 'PARAM', proto
=> 'udp', dport
=> '53' },
109 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '53' },
112 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3632' },
115 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '4662' },
116 { action
=> 'PARAM', proto
=> 'udp', dport
=> '4665' },
119 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '21' },
122 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '79' },
125 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2086' },
126 { action
=> 'PARAM', proto
=> 'udp', dport
=> '2086' },
127 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1080' },
128 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1080' },
131 { action
=> 'PARAM', proto
=> '47' },
132 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '47' },
135 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9418' },
138 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6346' },
139 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6346' },
142 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '11371' },
145 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
148 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
151 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3130' },
154 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5190' },
157 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '143' },
160 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '993' },
163 { action
=> 'PARAM', proto
=> '94' },
164 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '94' },
167 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '631' },
170 { action
=> 'PARAM', proto
=> 'udp', dport
=> '631' },
173 { action
=> 'PARAM', source
=> 'SOURCE', dest
=> 'DEST', proto
=> 'tcp', dport
=> '631' },
174 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '631' },
177 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
178 { action
=> 'PARAM', proto
=> '50' },
179 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '500', sport
=> '500' },
180 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '50' },
183 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
184 { action
=> 'PARAM', proto
=> '51' },
185 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '500', sport
=> '500' },
186 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '51' },
189 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500' },
190 { action
=> 'PARAM', proto
=> 'udp', dport
=> '4500' },
191 { action
=> 'PARAM', proto
=> '50' },
192 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '500' },
193 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '4500' },
194 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '50' },
197 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6667' },
200 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5222' },
203 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5223' },
206 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5269' },
209 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9100' },
212 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1701' },
213 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '1701' },
216 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '389' },
219 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '636' },
222 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1863' },
225 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1433' },
228 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
229 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
230 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
233 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '4949' },
236 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3306' },
239 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '119' },
242 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '563' },
245 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
248 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
249 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '123' },
252 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
253 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '123' },
256 { action
=> 'PARAM', proto
=> '89' },
259 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1194' },
262 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5632' },
263 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5631' },
266 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '110' },
269 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '995' },
272 { action
=> 'PARAM', proto
=> '47' },
273 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '47' },
274 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1723' },
277 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
280 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5432' },
283 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '515' },
286 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3389' },
289 { action
=> 'PARAM', proto
=> 'udp', dport
=> '520' },
290 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '520' },
293 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '953' },
296 { action
=> 'ACCEPT', proto
=> 'tcp', dport
=> '2703' },
299 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
302 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '873' },
305 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6566' },
308 { action
=> 'PARAM', proto
=> 'udp', dport
=> '135,445' },
309 { action
=> 'PARAM', proto
=> 'udp', dport
=> '137:139' },
310 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
311 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '135,139,445' },
314 { action
=> 'PARAM', proto
=> 'udp', dport
=> '135,445' },
315 { action
=> 'PARAM', proto
=> 'udp', dport
=> '137:139' },
316 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
317 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '135,139,445' },
318 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '135,445' },
319 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '137:139' },
320 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
321 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'tcp', dport
=> '135,139,445' },
324 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '901' },
327 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
330 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
333 { action
=> 'PARAM', proto
=> 'udp', dport
=> '161:162' },
334 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '161' },
337 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '783' },
340 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '22' },
343 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3690' },
346 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3874' },
347 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3740' },
348 { action
=> 'PARAM', proto
=> '41' },
349 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5072,8374' },
352 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3128' },
355 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
358 { action
=> 'PARAM', proto
=> 'udp', dport
=> '514' },
359 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '514' },
362 { action
=> 'PARAM', proto
=> 'udp', dport
=> '69' },
365 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '23' },
368 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '992' },
371 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
374 { action
=> 'PARAM', proto
=> 'udp', dport
=> '33434:33524' },
375 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
378 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5900:5909' },
381 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5500' },
384 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
385 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
388 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '8080' },
391 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10000' },
394 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '43' },
398 my $pve_fw_parsed_macros;
399 my $pve_fw_preferred_macro_names = {};
401 my $pve_std_chains = {
402 'PVEFW-SET-ACCEPT-MARK' => [
403 "-j MARK --set-mark 1",
405 'PVEFW-DropBroadcast' => [
406 # same as shorewall 'Broadcast'
407 # simply DROP BROADCAST/MULTICAST/ANYCAST
408 # we can use this to reduce logging
409 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
410 { action
=> 'DROP', dsttype
=> 'MULTICAST' },
411 { action
=> 'DROP', dsttype
=> 'ANYCAST' },
412 { action
=> 'DROP', dest
=> '224.0.0.0/4' },
415 # same as shorewall 'reject'
416 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
417 { action
=> 'DROP', source
=> '224.0.0.0/4' },
418 { action
=> 'DROP', proto
=> 'icmp' },
419 "-p tcp -j REJECT --reject-with tcp-reset",
420 "-p udp -j REJECT --reject-with icmp-port-unreachable",
421 "-p icmp -j REJECT --reject-with icmp-host-unreachable",
422 "-j REJECT --reject-with icmp-host-prohibited",
425 # same as shorewall 'Drop', which is equal to DROP,
426 # but REJECT/DROP some packages to reduce logging,
427 # and ACCEPT critical ICMP types
428 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
429 # we are not interested in BROADCAST/MULTICAST/ANYCAST
430 { action
=> 'PVEFW-DropBroadcast' },
431 # ACCEPT critical ICMP types
432 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
433 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
434 # Drop packets with INVALID state
435 "-m conntrack --ctstate INVALID -j DROP",
436 # Drop Microsoft SMB noise
437 { action
=> 'DROP', proto
=> 'udp', dport
=> '135,445', nbdport
=> 2 },
438 { action
=> 'DROP', proto
=> 'udp', dport
=> '137:139'},
439 { action
=> 'DROP', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
440 { action
=> 'DROP', proto
=> 'tcp', dport
=> '135,139,445', nbdport
=> 3 },
441 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
442 # Drop new/NotSyn traffic so that it doesn't get logged
443 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
445 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
448 # same as shorewall 'Reject', which is equal to Reject,
449 # but REJECT/DROP some packages to reduce logging,
450 # and ACCEPT critical ICMP types
451 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
452 # we are not interested in BROADCAST/MULTICAST/ANYCAST
453 { action
=> 'PVEFW-DropBroadcast' },
454 # ACCEPT critical ICMP types
455 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
456 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
457 # Drop packets with INVALID state
458 "-m conntrack --ctstate INVALID -j DROP",
459 # Drop Microsoft SMB noise
460 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '135,445', nbdport
=> 2 },
461 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '137:139'},
462 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
463 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '135,139,445', nbdport
=> 3 },
464 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
465 # Drop new/NotSyn traffic so that it doesn't get logged
466 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
468 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
470 'PVEFW-tcpflags' => [
471 # same as shorewall tcpflags action.
472 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
473 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
474 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
475 "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
476 "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
477 "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
480 # same as shorewall smurfs action
481 # Filter packets for smurfs (packets with a broadcast address as the source).
482 "-s 0.0.0.0/32 -j RETURN",
483 "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
484 "-s 224.0.0.0/4 -g PVEFW-smurflog",
488 # iptables -p icmp -h
489 my $icmp_type_names = {
492 'destination-unreachable' => 1,
493 'network-unreachable' => 1,
494 'host-unreachable' => 1,
495 'protocol-unreachable' => 1,
496 'port-unreachable' => 1,
497 'fragmentation-needed' => 1,
498 'source-route-failed' => 1,
499 'network-unknown' => 1,
501 'network-prohibited' => 1,
502 'host-prohibited' => 1,
503 'TOS-network-unreachable' => 1,
504 'TOS-host-unreachable' => 1,
505 'communication-prohibited' => 1,
506 'host-precedence-violation' => 1,
507 'precedence-cutoff' => 1,
508 'source-quench' => 1,
510 'network-redirect' => 1,
511 'host-redirect' => 1,
512 'TOS-network-redirect' => 1,
513 'TOS-host-redirect' => 1,
515 'router-advertisement' => 1,
516 'router-solicitation' => 1,
517 'time-exceeded' => 1,
518 'ttl-zero-during-transit' => 1,
519 'ttl-zero-during-reassembly' => 1,
520 'parameter-problem' => 1,
521 'ip-header-bad' => 1,
522 'required-option-missing' => 1,
523 'timestamp-request' => 1,
524 'timestamp-reply' => 1,
525 'address-mask-request' => 1,
526 'address-mask-reply' => 1,
529 sub init_firewall_macros
{
531 $pve_fw_parsed_macros = {};
533 foreach my $k (keys %$pve_fw_macros) {
534 my $lc_name = lc($k);
535 my $macro = $pve_fw_macros->{$k};
536 $pve_fw_preferred_macro_names->{$lc_name} = $k;
537 $pve_fw_parsed_macros->{$k} = $macro;
541 init_firewall_macros
();
545 sub get_etc_services
{
547 return $etc_services if $etc_services;
549 my $filename = "/etc/services";
551 my $fh = IO
::File-
>new($filename, O_RDONLY
);
553 warn "unable to read '$filename' - $!\n";
559 while (my $line = <$fh>) {
561 next if $line =~m/^#/;
562 next if ($line =~m/^\s*$/);
564 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
565 $services->{byid
}->{$2}->{name
} = $1;
566 $services->{byid
}->{$2}->{port
} = $2;
567 $services->{byid
}->{$2}->{$3} = 1;
568 $services->{byname
}->{$1} = $services->{byid
}->{$2};
574 $etc_services = $services;
577 return $etc_services;
582 sub get_etc_protocols
{
583 return $etc_protocols if $etc_protocols;
585 my $filename = "/etc/protocols";
587 my $fh = IO
::File-
>new($filename, O_RDONLY
);
589 warn "unable to read '$filename' - $!\n";
595 while (my $line = <$fh>) {
597 next if $line =~m/^#/;
598 next if ($line =~m/^\s*$/);
600 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
601 $protocols->{byid
}->{$2}->{name
} = $1;
602 $protocols->{byname
}->{$1} = $protocols->{byid
}->{$2};
608 $etc_protocols = $protocols;
610 return $etc_protocols;
613 sub parse_address_list
{
616 return if $str !~ m/^(\+)(\S+)$/; # ipset ref
620 foreach my $elem (split(/,/, $str)) {
622 if (!Net
::IP-
>new($elem)) {
623 my $err = Net
::IP
::Error
();
624 die "invalid IP address: $err\n";
626 $iprange = 1 if $elem =~ m/-/;
629 die "you can use a range in a list\n" if $iprange && $count > 1;
632 sub parse_port_name_number_or_range
{
635 my $services = PVE
::Firewall
::get_etc_services
();
637 foreach my $item (split(/,/, $str)) {
641 foreach my $pon (split(':', $item, 2)) {
642 $pon = $services->{byname
}->{$pon}->{port
} if $services->{byname
}->{$pon}->{port
};
643 if ($pon =~ m/^\d+$/){
644 die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535;
645 die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon);
648 die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname
}->{$pon};
656 PVE
::JSONSchema
::register_format
('pve-fw-port-spec', \
&pve_fw_verify_port_spec
);
657 sub pve_fw_verify_port_spec
{
660 parse_port_name_number_or_range
($portstr);
665 PVE
::JSONSchema
::register_format
('pve-fw-v4addr-spec', \
&pve_fw_verify_v4addr_spec
);
666 sub pve_fw_verify_v4addr_spec
{
669 parse_address_list
($list);
674 PVE
::JSONSchema
::register_format
('pve-fw-protocol-spec', \
&pve_fw_verify_protocol_spec
);
675 sub pve_fw_verify_protocol_spec
{
678 my $protocols = get_etc_protocols
();
680 die "unknown protocol '$proto'\n" if $proto &&
681 !(defined($protocols->{byname
}->{$proto}) ||
682 defined($protocols->{byid
}->{$proto}));
688 # helper function for API
690 my $rule_properties = {
692 description
=> "Update rule at position <pos>.",
706 enum
=> ['in', 'out', 'group'],
711 enum
=> ['ACCEPT', 'DROP', 'REJECT'],
718 iface
=> get_standard_option
('pve-iface', { optional
=> 1 }),
720 type
=> 'string', format
=> 'pve-fw-v4addr-spec',
724 type
=> 'string', format
=> 'pve-fw-v4addr-spec',
728 type
=> 'string', format
=> 'pve-fw-protocol-spec',
736 type
=> 'string', format
=> 'pve-fw-port-spec',
740 type
=> 'string', format
=> 'pve-fw-port-spec',
749 sub cleanup_fw_rule
{
750 my ($rule, $digest, $pos) = @_;
754 foreach my $k (keys %$rule) {
755 next if !$rule_properties->{$k};
757 next if !defined($v);
759 $r->{digest
} = $digest;
766 sub add_rule_properties
{
767 my ($properties) = @_;
769 foreach my $k (keys %$rule_properties) {
770 $properties->{$k} = $rule_properties->{$k};
777 my ($rule, $param) = @_;
779 foreach my $k (keys %$rule_properties) {
780 if (defined(my $v = $param->{$k})) {
781 if ($v eq '' || $v eq '-') {
794 my $bridge_firewall_enabled = 0;
796 sub enable_bridge_firewall
{
798 return if $bridge_firewall_enabled; # only once
800 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
801 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
803 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
804 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/ipv4/tcp_syncookies", "1");
806 $bridge_firewall_enabled = 1;
809 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
811 sub iptables_restore_cmdlist
{
814 run_command
("/sbin/iptables-restore -n", input
=> $cmdlist);
817 sub ipset_restore_cmdlist
{
820 run_command
("/usr/sbin/ipset restore", input
=> $cmdlist);
823 sub iptables_get_chains
{
827 # check what chains we want to track
828 my $is_pvefw_chain = sub {
831 return 1 if $name =~ m/^PVEFW-\S+$/;
833 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
835 return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
837 return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
839 return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT|IPS)$/;
840 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
852 return if $line =~ m/^#/;
853 return if $line =~ m/^\s*$/;
855 if ($line =~ m/^\*(\S+)$/) {
860 return if $table ne 'filter';
862 if ($line =~ m/^:(\S+)\s/) {
864 return if !&$is_pvefw_chain($chain);
865 $res->{$chain} = "unknown";
866 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
867 my ($chain, $sig) = ($1, $2);
868 return if !&$is_pvefw_chain($chain);
869 $res->{$chain} = $sig;
870 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
873 # simply ignore the rest
878 run_command
("/sbin/iptables-save", outfunc
=> $parser);
880 return wantarray ?
($res, $hooks) : $res;
883 sub iptables_chain_digest
{
885 my $digest = Digest
::SHA-
>new('sha1');
886 foreach my $rule (@$rules) { # order is important
889 return $digest->b64digest;
892 sub ipset_chain_digest
{
895 my $digest = Digest
::SHA-
>new('sha1');
896 foreach my $rule (sort @$rules) { # note: sorted
899 return $digest->b64digest;
902 sub ipset_get_chains
{
910 return if $line =~ m/^#/;
911 return if $line =~ m/^\s*$/;
912 if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
914 $line =~ s/\s+$//; # delete trailing white space
915 push @{$chains->{$chain}}, $line;
917 # simply ignore the rest
922 run_command
("/usr/sbin/ipset save", outfunc
=> $parser);
924 # compute digest for each chain
925 foreach my $chain (keys %$chains) {
926 $res->{$chain} = ipset_chain_digest
($chains->{$chain});
932 sub ruleset_generate_cmdstr
{
933 my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
935 return if defined($rule->{enable
}) && !$rule->{enable
};
937 die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
939 my $nbdport = defined($rule->{dport
}) ? parse_port_name_number_or_range
($rule->{dport
}) : 0;
940 my $nbsport = defined($rule->{sport
}) ? parse_port_name_number_or_range
($rule->{sport
}) : 0;
944 push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in
};
945 push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out
};
947 my $source = $rule->{source
};
948 my $dest = $rule->{dest
};
951 if ($source =~ m/^(\+)(\S+)$/) {
952 die "no such ipset $2" if !$cluster_conf->{ipset
}->{$2};
953 push @cmd, "-m set --match-set PVEFW-$2 src";
955 } elsif ($source =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
956 push @cmd, "-m iprange --src-range $source";
959 push @cmd, "-s $source";
964 if ($dest =~ m/^(\+)(\S+)$/) {
965 die "no such ipset $2" if !$cluster_conf->{ipset
}->{$2};
966 push @cmd, "-m set --match-set PVEFW-$2 dst";
968 } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
969 push @cmd, "-m iprange --dst-range $dest";
972 push @cmd, "-s $dest";
976 if ($rule->{proto
}) {
977 push @cmd, "-p $rule->{proto}";
980 $multiport++ if $nbdport > 1;
981 $multiport++ if $nbsport > 1;
983 push @cmd, "--match multiport" if $multiport;
985 die "multiport: option '--sports' cannot be used together with '--dports'\n"
986 if ($multiport == 2) && ($rule->{dport
} ne $rule->{sport
});
988 if ($rule->{dport
}) {
989 if ($rule->{proto
} && $rule->{proto
} eq 'icmp') {
990 # Note: we use dport to store --icmp-type
991 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport
}});
992 push @cmd, "-m icmp --icmp-type $rule->{dport}";
995 if ($multiport == 2) {
996 push @cmd, "--ports $rule->{dport}";
998 push @cmd, "--dports $rule->{dport}";
1001 push @cmd, "--dport $rule->{dport}";
1006 if ($rule->{sport
}) {
1008 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1010 push @cmd, "--sport $rule->{sport}";
1013 } elsif ($rule->{dport
} || $rule->{sport
}) {
1014 warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport
};
1015 warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport
};
1018 push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype
};
1020 if (my $action = $rule->{action
}) {
1021 $action = $actions->{$action} if defined($actions->{$action});
1022 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1023 push @cmd, $goto ?
"-g $action" : "-j $action";
1026 return scalar(@cmd) ?
join(' ', @cmd) : undef;
1029 my $apply_macro = sub {
1030 my ($macro_name, $param) = @_;
1032 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1033 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1037 foreach my $templ (@$macro_rules) {
1039 my $param_used = {};
1040 foreach my $k (keys %$templ) {
1041 my $v = $templ->{$k};
1042 if ($v eq 'PARAM') {
1044 $param_used->{$k} = 1;
1045 } elsif ($v eq 'DEST') {
1046 $v = $param->{dest
};
1047 $param_used->{dest
} = 1;
1048 } elsif ($v eq 'SOURCE') {
1049 $v = $param->{source
};
1050 $param_used->{source
} = 1;
1053 die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
1056 foreach my $k (keys %$param) {
1057 next if $k eq 'macro';
1058 next if !defined($param->{$k});
1059 next if $param_used->{$k};
1060 if (defined($rule->{$k})) {
1061 die "parameter '$k' already define in macro (value = '$rule->{$k}')\n"
1062 if $rule->{$k} ne $param->{$k};
1064 $rule->{$k} = $param->{$k};
1067 push @$rules, $rule;
1073 sub ruleset_generate_rule
{
1074 my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1078 if ($rule->{macro}) {
1079 $rules = &$apply_macro($rule->{macro}, $rule);
1084 foreach my $tmp (@$rules) {
1085 if (my $cmdstr = ruleset_generate_cmdstr
($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
1086 ruleset_addrule
($ruleset, $chain, $cmdstr);
1091 sub ruleset_generate_rule_insert
{
1092 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1094 die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1096 if (my $cmdstr = ruleset_generate_cmdstr
($ruleset, $chain, $rule, $actions, $goto)) {
1097 ruleset_insertrule
($ruleset, $chain, $cmdstr);
1101 sub ruleset_create_chain
{
1102 my ($ruleset, $chain) = @_;
1104 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1105 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1107 die "chain '$chain' already exists\n" if $ruleset->{$chain};
1109 $ruleset->{$chain} = [];
1112 sub ruleset_chain_exist
{
1113 my ($ruleset, $chain) = @_;
1115 return $ruleset->{$chain} ?
1 : undef;
1118 sub ruleset_addrule
{
1119 my ($ruleset, $chain, $rule) = @_;
1121 die "no such chain '$chain'\n" if !$ruleset->{$chain};
1123 push @{$ruleset->{$chain}}, "-A $chain $rule";
1126 sub ruleset_insertrule
{
1127 my ($ruleset, $chain, $rule) = @_;
1129 die "no such chain '$chain'\n" if !$ruleset->{$chain};
1131 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1134 sub get_log_rule_base
{
1135 my ($chain, $vmid, $msg, $loglevel) = @_;
1137 die "internal error - no log level" if !defined($loglevel);
1139 $vmid = 0 if !defined($vmid);
1141 # Note: we use special format for prefix to pass further
1142 # info to log daemon (VMID, LOGVELEL and CHAIN)
1144 return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1147 sub ruleset_addlog {
1148 my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1150 return if !defined($loglevel);
1152 my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1154 $logrule = "$rule $logrule" if defined($rule);
1156 ruleset_addrule($ruleset, $chain, $logrule)
1159 sub generate_bridge_chains {
1160 my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_;
1162 my $options = $hostfw_conf->{options} || {};
1164 die "error
: detected direct route to bridge
'$bridge'\n"
1165 if !$options->{allow_bridge_route} && $routing_table->{$bridge};
1167 if (!ruleset_chain_exist($ruleset, "$bridge-FW
")) {
1168 ruleset_create_chain($ruleset, "$bridge-FW
");
1169 ruleset_addrule($ruleset, "PVEFW-FORWARD
", "-o
$bridge -m physdev
--physdev-is-out
-j
$bridge-FW
");
1170 ruleset_addrule($ruleset, "PVEFW-FORWARD
", "-i
$bridge -m physdev
--physdev-is-in
-j
$bridge-FW
");
1173 if (!ruleset_chain_exist($ruleset, "$bridge-OUT
")) {
1174 ruleset_create_chain($ruleset, "$bridge-OUT
");
1175 ruleset_addrule($ruleset, "$bridge-FW
", "-m physdev
--physdev-is-in
-j
$bridge-OUT
");
1176 ruleset_insertrule($ruleset, "PVEFW-INPUT
", "-i
$bridge -m physdev
--physdev-is-in
-j
$bridge-OUT
");
1179 if (!ruleset_chain_exist($ruleset, "$bridge-IN
")) {
1180 ruleset_create_chain($ruleset, "$bridge-IN
");
1181 ruleset_addrule($ruleset, "$bridge-FW
", "-m physdev
--physdev-is-out
-j
$bridge-IN
");
1182 ruleset_addrule($ruleset, "$bridge-FW
", "-m mark
--mark
1 -j ACCEPT
");
1183 # accept traffic to unmanaged bridge ports
1184 ruleset_addrule($ruleset, "$bridge-FW
", "-m physdev
--physdev-is-out
-j ACCEPT
");
1188 sub ruleset_add_chain_policy {
1189 my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1191 if ($policy eq 'ACCEPT') {
1193 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1194 { ACCEPT => $accept_action});
1196 } elsif ($policy eq 'DROP') {
1198 ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop
");
1200 ruleset_addlog($ruleset, $chain, $vmid, "policy
$policy: ", $loglevel);
1202 ruleset_addrule($ruleset, $chain, "-j DROP
");
1203 } elsif ($policy eq 'REJECT') {
1204 ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject
");
1206 ruleset_addlog($ruleset, $chain, $vmid, "policy
$policy: ", $loglevel);
1208 ruleset_addrule($ruleset, $chain, "-g PVEFW-reject
");
1211 die "internal error
: unknown policy
'$policy'";
1215 sub ruleset_create_vm_chain {
1216 my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
1218 ruleset_create_chain($ruleset, $chain);
1219 my $accept = generate_nfqueue($options);
1221 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1222 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
,NEW
-j PVEFW-smurfs
");
1225 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1226 if ($direction eq 'OUT') {
1227 ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1228 proto => 'udp', sport => 68, dport => 67 });
1230 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1231 proto => 'udp', sport => 67, dport => 68 });
1235 if ($options->{tcpflags}) {
1236 ruleset_addrule($ruleset, $chain, "-p tcp
-j PVEFW-tcpflags
");
1239 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
-j DROP
");
1240 if ($direction eq 'OUT') {
1241 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
-g PVEFW-SET-ACCEPT-MARK
");
1243 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
-j
$accept");
1246 if ($direction eq 'OUT') {
1247 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1248 ruleset_addrule($ruleset, $chain, "-m mac
! --mac-source
$macaddr -j DROP
");
1250 ruleset_addrule($ruleset, $chain, "-j MARK
--set-mark
0"); # clear mark
1254 sub ruleset_generate_vm_rules {
1255 my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
1257 my $lc_direction = lc($direction);
1259 foreach my $rule (@$rules) {
1260 next if $rule->{iface} && $rule->{iface} ne $netid;
1261 next if !$rule->{enable};
1262 if ($rule->{type} eq 'group') {
1263 my $group_chain = "GROUP-
$rule->{action
}-$direction";
1264 if(!ruleset_chain_exist($ruleset, $group_chain)){
1265 generate_group_rules($ruleset, $cluster_conf, $rule->{action});
1267 ruleset_addrule($ruleset, $chain, "-j
$group_chain");
1268 if ($direction eq 'OUT'){
1269 ruleset_addrule($ruleset, $chain, "-m mark
--mark
1 -j RETURN
");
1271 my $accept = generate_nfqueue($options);
1272 ruleset_addrule($ruleset, $chain, "-m mark
--mark
1 -j
$accept");
1276 next if $rule->{type} ne $lc_direction;
1277 if ($direction eq 'OUT') {
1278 ruleset_generate_rule($ruleset, $chain, $rule,
1279 { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" }, undef, $cluster_conf);
1281 my $accept = generate_nfqueue($options);
1282 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept , REJECT => "PVEFW-reject
" }, undef, $cluster_conf);
1288 sub generate_nfqueue {
1292 if($options->{ips}){
1293 $action = "NFQUEUE
";
1294 if($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1295 if(defined($3) && defined($1)) {
1296 $action .= " --queue-balance
$1:$3";
1297 }elsif (defined($1)) {
1298 $action .= " --queue-num
$1";
1301 $action .= " --queue-bypass
";
1309 sub ruleset_generate_vm_ipsrules {
1310 my ($ruleset, $options, $direction, $iface, $bridge) = @_;
1312 if ($options->{ips} && $direction eq 'IN') {
1313 my $nfqueue = generate_nfqueue($options);
1315 if (!ruleset_chain_exist($ruleset, "$bridge-IPS
")) {
1316 ruleset_create_chain($ruleset, "PVEFW-IPS
");
1319 if (!ruleset_chain_exist($ruleset, "$bridge-IPS
")) {
1320 ruleset_create_chain($ruleset, "$bridge-IPS
");
1321 ruleset_insertrule($ruleset, "PVEFW-IPS
", "-o
$bridge -m physdev
--physdev-is-out
-j
$bridge-IPS
");
1324 ruleset_addrule($ruleset, "$bridge-IPS
", "-m physdev
--physdev-out
$iface --physdev-is-bridged
-j
$nfqueue");
1328 sub generate_venet_rules_direction {
1329 my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1331 parse_address_list($ip); # make sure we have a valid $ip list
1333 my $lc_direction = lc($direction);
1335 my $rules = $vmfw_conf->{rules};
1337 my $options = $vmfw_conf->{options};
1338 my $loglevel = get_option_log_level($options, "log_level_
${lc_direction
}");
1340 my $chain = "venet0-
$vmid-$direction";
1342 ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1344 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
1349 if ($direction eq 'OUT') {
1350 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1352 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1355 my $accept = generate_nfqueue($options);
1356 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : $accept;
1357 ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1359 # plug into FORWARD, INPUT and OUTPUT chain
1360 if ($direction eq 'OUT') {
1361 ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD
", {
1364 iface_in => 'venet0'});
1366 ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT
", {
1369 iface_in => 'venet0'});
1371 ruleset_generate_rule($ruleset, "PVEFW-FORWARD
", {
1374 iface_out => 'venet0'});
1376 ruleset_generate_rule($ruleset, "PVEFW-OUTPUT
", {
1379 iface_out => 'venet0'});
1383 sub generate_tap_rules_direction {
1384 my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_;
1386 my $lc_direction = lc($direction);
1388 my $rules = $vmfw_conf->{rules};
1390 my $options = $vmfw_conf->{options};
1391 my $loglevel = get_option_log_level($options, "log_level_
${lc_direction
}");
1393 my $tapchain = "$iface-$direction";
1395 ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1397 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
1399 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface, $bridge);
1404 if ($direction eq 'OUT') {
1405 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1407 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1410 my $accept = generate_nfqueue($options);
1411 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : $accept;
1412 ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1414 # plug the tap chain to bridge chain
1415 if ($direction eq 'IN') {
1416 ruleset_insertrule($ruleset, "$bridge-IN
",
1417 "-m physdev
--physdev-is-bridged
--physdev-out
$iface -j
$tapchain");
1419 ruleset_insertrule($ruleset, "$bridge-OUT
",
1420 "-m physdev
--physdev-in
$iface -j
$tapchain");
1424 sub enable_host_firewall {
1425 my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1427 # fixme: allow security groups
1429 my $options = $hostfw_conf->{options};
1430 my $rules = $hostfw_conf->{rules};
1432 # host inbound firewall
1433 my $chain = "PVEFW-HOST-IN
";
1434 ruleset_create_chain($ruleset, $chain);
1436 my $loglevel = get_option_log_level($options, "log_level_in
");
1438 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1439 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
,NEW
-j PVEFW-smurfs
");
1442 if ($options->{tcpflags}) {
1443 ruleset_addrule($ruleset, $chain, "-p tcp
-j PVEFW-tcpflags
");
1446 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
-j DROP
");
1447 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
-j ACCEPT
");
1448 ruleset_addrule($ruleset, $chain, "-i lo
-j ACCEPT
");
1449 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
-j ACCEPT
");
1450 ruleset_addrule($ruleset, $chain, "-p udp
-m conntrack
--ctstate NEW
--dport
5404:5405 -j ACCEPT
");
1451 ruleset_addrule($ruleset, $chain, "-p udp
-m udp
--dport
9000 -j ACCEPT
"); #corosync
1453 # we use RETURN because we need to check also tap rules
1454 my $accept_action = 'RETURN';
1456 foreach my $rule (@$rules) {
1457 next if $rule->{type} ne 'in';
1458 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" }, undef, $cluster_conf);
1461 # implement input policy
1462 my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1463 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1465 # host outbound firewall
1466 $chain = "PVEFW-HOST-OUT
";
1467 ruleset_create_chain($ruleset, $chain);
1469 $loglevel = get_option_log_level($options, "log_level_out
");
1471 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
-j DROP
");
1472 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
-j ACCEPT
");
1473 ruleset_addrule($ruleset, $chain, "-o lo
-j ACCEPT
");
1474 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
-j ACCEPT
");
1475 ruleset_addrule($ruleset, $chain, "-p udp
-m conntrack
--ctstate NEW
--dport
5404:5405 -j ACCEPT
");
1476 ruleset_addrule($ruleset, $chain, "-p udp
-m udp
--dport
9000 -j ACCEPT
"); #corosync
1478 # we use RETURN because we may want to check other thigs later
1479 $accept_action = 'RETURN';
1481 foreach my $rule (@$rules) {
1482 next if $rule->{type} ne 'out';
1483 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" }, undef, $cluster_conf);
1486 # implement output policy
1487 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1488 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1490 ruleset_addrule($ruleset, "PVEFW-OUTPUT
", "-j PVEFW-HOST-OUT
");
1491 ruleset_addrule($ruleset, "PVEFW-INPUT
", "-j PVEFW-HOST-IN
");
1494 sub generate_group_rules {
1495 my ($ruleset, $cluster_conf, $group) = @_;
1496 die "no such security group
'$group'\n" if !$cluster_conf->{groups}->{$group};
1498 my $rules = $cluster_conf->{groups}->{$group};
1500 my $chain = "GROUP-
${group
}-IN
";
1502 ruleset_create_chain($ruleset, $chain);
1503 ruleset_addrule($ruleset, $chain, "-j MARK
--set-mark
0"); # clear mark
1505 foreach my $rule (@$rules) {
1506 next if $rule->{type} ne 'in';
1507 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" }, undef, $cluster_conf);
1510 $chain = "GROUP-
${group
}-OUT
";
1512 ruleset_create_chain($ruleset, $chain);
1513 ruleset_addrule($ruleset, $chain, "-j MARK
--set-mark
0"); # clear mark
1515 foreach my $rule (@$rules) {
1516 next if $rule->{type} ne 'out';
1517 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1518 # check also other tap rules later
1519 ruleset_generate_rule($ruleset, $chain, $rule,
1520 { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject
" }, undef, $cluster_conf);
1525 my $valid_netdev_names = {};
1526 for (my $i = 0; $i < $MAX_NETS; $i++) {
1527 $valid_netdev_names->{"net
$i"} = 1;
1531 my ($line, $need_iface, $allow_groups) = @_;
1533 my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
1535 # we can add single line comments to the end of the rule
1536 my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
1538 # we can disable a rule when prefixed with '|'
1541 $enable = 0 if $line =~ s/^\|//;
1543 my @data = split(/\s+/, $line);
1544 my $expected_elements = $need_iface ? 8 : 7;
1546 die "wrong number of rule elements
\n" if scalar(@data) > $expected_elements;
1549 ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
1551 ($type, $action, $source, $dest, $proto, $dport, $sport) = @data;
1554 die "incomplete rule
\n" if ! ($type && $action);
1560 if ($type eq 'in' || $type eq 'out') {
1561 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1563 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1565 my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1566 die "unknown
macro '$1'\n" if !$preferred_name;
1567 $macro = $preferred_name;
1569 die "unknown action
'$action'\n";
1571 } elsif ($type eq 'group') {
1572 die "wrong number of rule elements
\n" if scalar(@data) != 3;
1573 die "groups disabled
\n" if !$allow_groups;
1575 die "invalid characters
in group name
\n" if $action !~ m/^[A-Za-z0-9_\-]+$/;
1577 die "unknown rule type
'$type'\n";
1581 $iface = undef if $iface && $iface eq '-';
1584 $proto = undef if $proto && $proto eq '-';
1585 pve_fw_verify_protocol_spec($proto) if $proto;
1587 $source = undef if $source && $source eq '-';
1588 $dest = undef if $dest && $dest eq '-';
1590 $dport = undef if $dport && $dport eq '-';
1591 $sport = undef if $sport && $sport eq '-';
1593 parse_port_name_number_or_range($dport) if defined($dport);
1594 parse_port_name_number_or_range($sport) if defined($sport);
1596 parse_address_list($source) if $source;
1597 parse_address_list($dest) if $dest;
1602 comment => $comment,
1614 sub parse_vmfw_option {
1619 my $loglevels = "emerg
|alert
|crit
|err
|warning
|notice
|info
|debug
|nolog
";
1621 if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags|ips):\s*(0|1)\s*$/i) {
1624 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1626 $value = $2 ? lc($3) : '';
1627 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1630 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1635 die "can
't parse option '$line'\n"
1638 return ($opt, $value);
1641 sub parse_hostfw_option {
1646 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1648 if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags|allow_bridge_route|optimize):\s*(0|1)\s*$/i) {
1651 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1653 $value = $2 ? lc($3) : '';
1654 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1657 } elsif ($line =~ m/^(nf_conntrack_max):\s*(\d+)\s*$/i) {
1662 die "can't parse option
'$line'\n"
1665 return ($opt, $value);
1668 sub parse_clusterfw_option {
1673 if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1678 die "can
't parse option '$line'\n"
1681 return ($opt, $value);
1684 sub parse_vm_fw_rules {
1685 my ($filename, $fh) = @_;
1687 my $res = { rules => [], options => {}};
1691 my $digest = Digest::SHA->new('sha1
');
1693 while (defined(my $line = <$fh>)) {
1694 $digest->add($line);
1696 next if $line =~ m/^#/;
1697 next if $line =~ m/^\s*$/;
1699 my $linenr = $fh->input_line_number();
1700 my $prefix = "$filename (line $linenr)";
1702 if ($line =~ m/^\[(\S+)\]\s*$/i) {
1704 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1708 warn "$prefix: skip line - no section";
1712 next if !$res->{$section}; # skip undefined section
1714 if ($section eq 'options
') {
1716 my ($opt, $value) = parse_vmfw_option($line);
1717 $res->{options}->{$opt} = $value;
1719 warn "$prefix: $@" if $@;
1724 eval { $rule = parse_fw_rule($line, 1, 1); };
1726 warn "$prefix: $err";
1730 push @{$res->{$section}}, $rule;
1733 $res->{digest} = $digest->b64digest;
1738 sub parse_host_fw_rules {
1739 my ($filename, $fh) = @_;
1741 my $res = { rules => [], options => {}};
1745 my $digest = Digest::SHA->new('sha1
');
1747 while (defined(my $line = <$fh>)) {
1748 $digest->add($line);
1750 next if $line =~ m/^#/;
1751 next if $line =~ m/^\s*$/;
1753 my $linenr = $fh->input_line_number();
1754 my $prefix = "$filename (line $linenr)";
1756 if ($line =~ m/^\[(\S+)\]\s*$/i) {
1758 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1762 warn "$prefix: skip line - no section";
1766 next if !$res->{$section}; # skip undefined section
1768 if ($section eq 'options
') {
1770 my ($opt, $value) = parse_hostfw_option($line);
1771 $res->{options}->{$opt} = $value;
1773 warn "$prefix: $@" if $@;
1778 eval { $rule = parse_fw_rule($line, 1, 1); };
1780 warn "$prefix: $err";
1784 push @{$res->{$section}}, $rule;
1787 $res->{digest} = $digest->b64digest;
1792 sub parse_cluster_fw_rules {
1793 my ($filename, $fh) = @_;
1798 my $res = { rules => [], options => {}, groups => {}, ipset => {} };
1800 my $digest = Digest::SHA->new('sha1
');
1802 while (defined(my $line = <$fh>)) {
1803 $digest->add($line);
1805 next if $line =~ m/^#/;
1806 next if $line =~ m/^\s*$/;
1808 my $linenr = $fh->input_line_number();
1809 my $prefix = "$filename (line $linenr)";
1811 if ($line =~ m/^\[options\]$/i) {
1812 $section = 'options
';
1816 if ($line =~ m/^\[group\s+(\S+)\]\s*$/i) {
1817 $section = 'groups
';
1822 if ($line =~ m/^\[rules\]$/i) {
1827 if ($line =~ m/^\[ipset\s+(\S+)\]\s*$/i) {
1834 warn "$prefix: skip line - no section\n";
1838 if ($section eq 'options
') {
1840 my ($opt, $value) = parse_clusterfw_option($line);
1841 $res->{options}->{$opt} = $value;
1843 warn "$prefix: $@" if $@;
1844 } elsif ($section eq 'rules
') {
1846 eval { $rule = parse_fw_rule($line, 1, 1); };
1848 warn "$prefix: $err";
1851 push @{$res->{$section}}, $rule;
1852 } elsif ($section eq 'groups
') {
1854 eval { $rule = parse_fw_rule($line, 0, 0); };
1856 warn "$prefix: $err";
1859 push @{$res->{$section}->{$group}}, $rule;
1860 } elsif ($section eq 'ipset
') {
1862 $line =~ m/^(\!)?\s*((\d+)\.(\d+)\.(\d+)\.(\d+)(\/(\d+))?)/;
1867 warn "$prefix: $line is not an valid ip address\n";
1870 if (!Net::IP->new($ip)) {
1871 warn "$prefix: $line is not an valid ip address\n";
1876 if ($feature_ipset_nomatch) {
1877 push @{$res->{$section}->{$group}}, "$ip nomatch";
1879 warn "$prefix: ignore $line - nomatch not supported by kernel\n";
1882 push @{$res->{$section}->{$group}}, $ip;
1887 $res->{digest} = $digest->b64digest;
1892 my ($code, @param) = @_;
1896 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
1903 sub read_local_vm_config {
1908 my $vmdata = { openvz => $openvz, qemu => $qemu };
1910 my $vmlist = PVE::Cluster::get_vmlist();
1911 return $vmdata if !$vmlist || !$vmlist->{ids};
1912 my $ids = $vmlist->{ids};
1914 foreach my $vmid (keys %$ids) {
1915 next if !$vmid; # skip VE0
1916 my $d = $ids->{$vmid};
1917 next if !$d->{node} || $d->{node} ne $nodename;
1918 next if !$d->{type};
1919 if ($d->{type} eq 'openvz
') {
1920 if ($have_pve_manager) {
1921 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
1922 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1923 $openvz->{$vmid} = $conf;
1926 } elsif ($d->{type} eq 'qemu
') {
1927 if ($have_qemu_server) {
1928 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
1929 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1930 $qemu->{$vmid} = $conf;
1939 sub load_vmfw_conf {
1944 my $filename = "/etc/pve/firewall/$vmid.fw";
1945 if (my $fh = IO::File->new($filename, O_RDONLY)) {
1946 $vmfw_conf = parse_vm_fw_rules($filename, $fh);
1952 my $format_rules = sub {
1953 my ($rules, $need_iface) = @_;
1957 foreach my $rule (@$rules) {
1958 if ($rule->{type} eq 'in' || $rule->{type} eq 'out
') {
1959 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
1960 $raw .= uc($rule->{type});
1961 $raw .= " " . $rule->{action};
1962 $raw .= " " . ($rule->{iface} || '-') if $need_iface;
1963 $raw .= " " . ($rule->{source} || '-');
1964 $raw .= " " . ($rule->{dest} || '-');
1965 $raw .= " " . ($rule->{proto} || '-');
1966 $raw .= " " . ($rule->{dport} || '-');
1967 $raw .= " " . ($rule->{sport} || '-');
1968 $raw .= " # " . encode('utf8
', $rule->{comment})
1969 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
1972 die "implement me '$rule->{type
}'";
1979 my $format_options = sub {
1984 $raw .= "[OPTIONS]\n\n";
1985 foreach my $opt (keys %$options) {
1986 $raw .= "$opt: $options->{$opt}\n";
1993 sub save_vmfw_conf {
1994 my ($vmid, $vmfw_conf) = @_;
1998 my $options = $vmfw_conf->{options};
1999 $raw .= &$format_options($options) if scalar(keys %$options);
2001 my $rules = $vmfw_conf->{rules};
2002 if (scalar(@$rules)) {
2003 $raw .= "[RULES]\n\n";
2004 $raw .= &$format_rules($rules, 1);
2008 my $filename = "/etc/pve/firewall/$vmid.fw";
2009 PVE::Tools::file_set_contents($filename, $raw);
2012 sub read_vm_firewall_configs {
2014 my $vmfw_configs = {};
2016 foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
2017 my $vmfw_conf = load_vmfw_conf($vmid);
2018 next if !$vmfw_conf->{options}; # skip if file does not exists
2019 $vmfw_configs->{$vmid} = $vmfw_conf;
2022 return $vmfw_configs;
2025 sub get_option_log_level {
2026 my ($options, $k) = @_;
2028 my $v = $options->{$k};
2029 $v = $default_log_level if !defined($v);
2031 return undef if $v eq '' || $v eq 'nolog
';
2033 $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2035 return $v if ($v >= 0) && ($v <= 7);
2037 warn "unknown log level ($k = '$v')\n";
2042 sub generate_std_chains {
2043 my ($ruleset, $options) = @_;
2045 my $loglevel = get_option_log_level($options, 'smurf_log_level
');
2047 # same as shorewall smurflog.
2048 my $chain = 'PVEFW-smurflog
';
2050 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2051 push @{$pve_std_chains->{$chain}}, "-j DROP";
2053 # same as shorewall logflags action.
2054 $loglevel = get_option_log_level($options, 'tcp_flags_log_level
');
2055 $chain = 'PVEFW-logflags
';
2056 # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2057 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2058 push @{$pve_std_chains->{$chain}}, "-j DROP";
2060 foreach my $chain (keys %$pve_std_chains) {
2061 ruleset_create_chain($ruleset, $chain);
2062 foreach my $rule (@{$pve_std_chains->{$chain}}) {
2064 ruleset_generate_rule($ruleset, $chain, $rule);
2066 ruleset_addrule($ruleset, $chain, $rule);
2072 sub generate_ipset_chains {
2073 my ($ipset_ruleset, $fw_conf) = @_;
2075 foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2076 generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset});
2080 sub generate_ipset {
2081 my ($ipset_ruleset, $name, $options) = @_;
2083 my $hashsize = scalar(@$options);
2084 if ($hashsize <= 64) {
2087 $hashsize = round_powerof2($hashsize);
2090 push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
2092 foreach my $ip (@$options) {
2093 push @{$ipset_ruleset->{$name}}, "add $name $ip";
2097 sub round_powerof2 {
2101 $int |= $int >> $_ foreach (1,2,4,8,16);
2105 sub save_pvefw_status {
2108 die "unknown status '$status' - internal error"
2109 if $status !~ m/^(stopped|active)$/;
2111 mkdir dirname($pve_fw_status_filename);
2112 PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
2115 sub read_pvefw_status {
2117 my $status = 'unknown
';
2119 return 'stopped
' if ! -f $pve_fw_status_filename;
2122 $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
2129 # fixme: move to pve-common PVE::ProcFSTools
2130 sub read_proc_net_route {
2131 my $filename = "/proc/net/route";
2135 my $fh = IO::File->new ($filename, "r");
2136 return $res if !$fh;
2138 my $int_to_quad = sub {
2139 return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
2142 while (defined(my $line = <$fh>)) {
2143 next if $line =~/^Iface\s+Destination/; # skip head
2144 my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
2145 push @{$res->{$iface}}, {
2146 dest => &$int_to_quad(hex($dest)),
2147 gateway => &$int_to_quad(hex($gateway)),
2148 mask => &$int_to_quad(hex($mask)),
2157 sub load_clusterfw_conf {
2159 my $cluster_conf = {};
2160 if (my $fh = IO::File->new($clusterfw_conf_filename, O_RDONLY)) {
2161 $cluster_conf = parse_cluster_fw_rules($clusterfw_conf_filename, $fh);
2164 return $cluster_conf;
2167 sub save_clusterfw_conf {
2168 my ($cluster_conf) = @_;
2172 my $options = $cluster_conf->{options};
2173 $raw .= &$format_options($options) if scalar(keys %$options);
2177 my $rules = $cluster_conf->{rules};
2178 if (scalar(@$rules)) {
2179 $raw .= "[RULES]\n\n";
2180 $raw .= &$format_rules($rules, 1);
2184 foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2185 my $rules = $cluster_conf->{groups}->{$group};
2186 $raw .= "[group $group]\n\n";
2187 $raw .= &$format_rules($rules, 0);
2191 PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2194 sub load_hostfw_conf {
2196 my $hostfw_conf = {};
2197 if (my $fh = IO::File->new($hostfw_conf_filename, O_RDONLY)) {
2198 $hostfw_conf = parse_host_fw_rules($hostfw_conf_filename, $fh);
2200 return $hostfw_conf;
2203 sub save_hostfw_conf {
2204 my ($hostfw_conf) = @_;
2208 my $options = $hostfw_conf->{options};
2209 $raw .= &$format_options($options) if scalar(keys %$options);
2211 my $rules = $hostfw_conf->{rules};
2212 if (scalar(@$rules)) {
2213 $raw .= "[RULES]\n\n";
2214 $raw .= &$format_rules($rules, 1);
2218 PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2222 my $vmdata = read_local_vm_config();
2223 my $vmfw_configs = read_vm_firewall_configs($vmdata);
2225 my $routing_table = read_proc_net_route();
2227 my $cluster_conf = load_clusterfw_conf();
2229 my $ipset_ruleset = {};
2230 generate_ipset_chains($ipset_ruleset, $cluster_conf);
2234 ruleset_create_chain($ruleset, "PVEFW-INPUT");
2235 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2237 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2239 my $hostfw_conf = load_hostfw_conf();
2240 my $hostfw_options = $hostfw_conf->{options} || {};
2242 generate_std_chains($ruleset, $hostfw_options);
2244 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2246 enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
2248 # generate firewall rules for QEMU VMs
2249 foreach my $vmid (keys %{$vmdata->{qemu}}) {
2250 my $conf = $vmdata->{qemu}->{$vmid};
2251 my $vmfw_conf = $vmfw_configs->{$vmid};
2252 next if !$vmfw_conf;
2253 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2255 foreach my $netid (keys %$conf) {
2256 next if $netid !~ m/^net(\d+)$/;
2257 my $net = PVE::QemuServer::parse_net($conf->{$netid});
2259 my $iface = "tap${vmid}i$1";
2261 my $bridge = $net->{bridge};
2262 next if !$bridge; # fixme: ?
2264 $bridge .= "v$net->{tag}" if $net->{tag};
2266 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2268 my $macaddr = $net->{macaddr};
2269 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2270 $vmfw_conf, $vmid, $bridge, 'IN
');
2271 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2272 $vmfw_conf, $vmid, $bridge, 'OUT
');
2276 # generate firewall rules for OpenVZ containers
2277 foreach my $vmid (keys %{$vmdata->{openvz}}) {
2278 my $conf = $vmdata->{openvz}->{$vmid};
2280 my $vmfw_conf = $vmfw_configs->{$vmid};
2281 next if !$vmfw_conf;
2282 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2284 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2285 my $ip = $conf->{ip_address}->{value};
2286 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN
');
2287 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT
');
2290 if ($conf->{netif} && $conf->{netif}->{value}) {
2291 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2292 foreach my $netid (keys %$netif) {
2293 my $d = $netif->{$netid};
2294 my $bridge = $d->{bridge};
2296 warn "no bridge device for CT $vmid iface '$netid'\n";
2300 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2302 my $macaddr = $d->{mac};
2303 my $iface = $d->{host_ifname};
2304 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2305 $vmfw_conf, $vmid, $bridge, 'IN
');
2306 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2307 $vmfw_conf, $vmid, $bridge, 'OUT
');
2312 if($hostfw_options->{optimize}){
2314 my $accept = ruleset_chain_exist($ruleset, "PVEFW-IPS") ? "PVEFW-IPS" : "ACCEPT";
2315 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
2316 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate INVALID -j DROP");
2319 # fixme: what log level should we use here?
2320 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2322 # fixme: should we really block inter-bridge traffic?
2324 # always allow traffic from containers?
2325 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN");
2327 # disable interbridge routing
2328 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop");
2329 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop");
2330 ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-o vmbr+");
2331 ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-i vmbr+");
2332 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP");
2333 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP");
2335 return wantarray ? ($ruleset, $hostfw_conf, $ipset_ruleset) : $ruleset;
2338 sub get_ruleset_status {
2339 my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2341 my $statushash = {};
2343 foreach my $chain (sort keys %$ruleset) {
2344 my $sig = &$digest_fn($ruleset->{$chain});
2346 $statushash->{$chain}->{sig} = $sig;
2348 my $oldsig = $active_chains->{$chain};
2349 if (!defined($oldsig)) {
2350 $statushash->{$chain}->{action} = 'create
';
2352 if ($oldsig eq $sig) {
2353 $statushash->{$chain}->{action} = 'exists';
2355 $statushash->{$chain}->{action} = 'update
';
2358 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2359 foreach my $cmd (@{$ruleset->{$chain}}) {
2360 print "\t$cmd\n" if $verbose;
2364 foreach my $chain (sort keys %$active_chains) {
2365 if (!defined($ruleset->{$chain})) {
2366 my $sig = $active_chains->{$chain};
2367 $statushash->{$chain}->{action} = 'delete';
2368 $statushash->{$chain}->{sig} = $sig;
2369 print "delete $chain ($sig)\n" if $verbose;
2376 sub print_sig_rule {
2377 my ($chain, $sig) = @_;
2379 # We just use this to store a SHA1 checksum used to detect changes
2380 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2383 sub get_ruleset_cmdlist {
2384 my ($ruleset, $verbose) = @_;
2386 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2388 my ($active_chains, $hooks) = iptables_get_chains();
2389 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2391 # create missing chains first
2392 foreach my $chain (sort keys %$ruleset) {
2393 my $stat = $statushash->{$chain};
2394 die "internal error" if !$stat;
2395 next if $stat->{action} ne 'create
';
2397 $cmdlist .= ":$chain - [0:0]\n";
2400 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2401 if (!$hooks->{$h}) {
2402 $cmdlist .= "-A $h -j PVEFW-$h\n";
2406 foreach my $chain (sort keys %$ruleset) {
2407 my $stat = $statushash->{$chain};
2408 die "internal error" if !$stat;
2410 if ($stat->{action
} eq 'update' || $stat->{action
} eq 'create') {
2411 $cmdlist .= "-F $chain\n";
2412 foreach my $cmd (@{$ruleset->{$chain}}) {
2413 $cmdlist .= "$cmd\n";
2415 $cmdlist .= print_sig_rule
($chain, $stat->{sig
});
2416 } elsif ($stat->{action
} eq 'delete') {
2417 die "internal error"; # this should not happen
2418 } elsif ($stat->{action
} eq 'exists') {
2421 die "internal error - unknown status '$stat->{action}'";
2425 foreach my $chain (keys %$statushash) {
2426 next if $statushash->{$chain}->{action
} ne 'delete';
2427 $cmdlist .= "-F $chain\n";
2429 foreach my $chain (keys %$statushash) {
2430 next if $statushash->{$chain}->{action
} ne 'delete';
2431 next if $chain eq 'PVEFW-INPUT';
2432 next if $chain eq 'PVEFW-OUTPUT';
2433 next if $chain eq 'PVEFW-FORWARD';
2434 $cmdlist .= "-X $chain\n";
2437 my $changes = $cmdlist ne "*filter\n" ?
1 : 0;
2439 $cmdlist .= "COMMIT\n";
2441 return wantarray ?
($cmdlist, $changes) : $cmdlist;
2444 sub get_ipset_cmdlist
{
2445 my ($ruleset, $verbose) = @_;
2449 my $delete_cmdlist = "";
2451 my $active_chains = ipset_get_chains
();
2452 my $statushash = get_ruleset_status
($ruleset, $active_chains, \
&ipset_chain_digest
, $verbose);
2454 foreach my $chain (sort keys %$ruleset) {
2455 my $stat = $statushash->{$chain};
2456 die "internal error" if !$stat;
2458 if ($stat->{action
} eq 'create') {
2459 foreach my $cmd (@{$ruleset->{$chain}}) {
2460 $cmdlist .= "$cmd\n";
2464 if ($stat->{action
} eq 'update') {
2465 my $chain_swap = $chain."_swap";
2467 foreach my $cmd (@{$ruleset->{$chain}}) {
2468 $cmd =~ s/$chain/$chain_swap/;
2469 $cmdlist .= "$cmd\n";
2471 $cmdlist .= "swap $chain_swap $chain\n";
2472 $cmdlist .= "flush $chain_swap\n";
2473 $cmdlist .= "destroy $chain_swap\n";
2478 foreach my $chain (keys %$statushash) {
2479 next if $statushash->{$chain}->{action
} ne 'delete';
2481 $delete_cmdlist .= "flush $chain\n";
2482 $delete_cmdlist .= "destroy $chain\n";
2485 my $changes = ($cmdlist || $delete_cmdlist) ?
1 : 0;
2487 return ($cmdlist, $delete_cmdlist, $changes);
2491 my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
2493 enable_bridge_firewall
();
2495 update_nf_conntrack_max
($hostfw_conf);
2497 my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
2498 get_ipset_cmdlist
($ipset_ruleset, undef, $verbose);
2500 my ($cmdlist, $changes) = get_ruleset_cmdlist
($ruleset, $verbose);
2503 if ($ipset_changes) {
2504 print "ipset changes:\n";
2505 print $ipset_create_cmdlist if $ipset_create_cmdlist;
2506 print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2510 print "iptables changes:\n";
2515 ipset_restore_cmdlist
($ipset_create_cmdlist);
2517 iptables_restore_cmdlist
($cmdlist);
2519 ipset_restore_cmdlist
($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2521 # test: re-read status and check if everything is up to date
2522 my $active_chains = iptables_get_chains
();
2523 my $statushash = get_ruleset_status
($ruleset, $active_chains, \
&iptables_chain_digest
, 0);
2526 foreach my $chain (sort keys %$ruleset) {
2527 my $stat = $statushash->{$chain};
2528 if ($stat->{action
} ne 'exists') {
2529 warn "unable to update chain '$chain'\n";
2534 die "unable to apply firewall changes\n" if $errors;
2537 sub update_nf_conntrack_max
{
2538 my ($hostfw_conf) = @_;
2540 my $max = 65536; # reasonable default
2542 my $options = $hostfw_conf->{options
} || {};
2544 if (defined($options->{nf_conntrack_max
}) && ($options->{nf_conntrack_max
} > $max)) {
2545 $max = $options->{nf_conntrack_max
};
2546 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2549 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2550 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2552 my $current = int(PVE
::Tools
::file_read_firstline
($filename_nf_conntrack_max) || $max);
2554 if ($current != $max) {
2555 my $hashsize = int($max/4);
2556 PVE
::ProcFSTools
::write_proc_entry
($filename_hashsize, $hashsize);
2557 PVE
::ProcFSTools
::write_proc_entry
($filename_nf_conntrack_max, $max);
2561 sub remove_pvefw_chains
{
2563 my ($chash, $hooks) = iptables_get_chains
();
2564 my $cmdlist = "*filter\n";
2566 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2568 $cmdlist .= "-D $h -j PVEFW-$h\n";
2572 foreach my $chain (keys %$chash) {
2573 $cmdlist .= "-F $chain\n";
2576 foreach my $chain (keys %$chash) {
2577 $cmdlist .= "-X $chain\n";
2579 $cmdlist .= "COMMIT\n";
2581 iptables_restore_cmdlist
($cmdlist);
2585 my ($start, $verbose) = @_;
2588 my $status = read_pvefw_status
();
2590 my ($ruleset, $hostfw_conf, $ipset_ruleset) = compile
();
2592 if ($start || $status eq 'active') {
2594 save_pvefw_status
('active') if ($status ne 'active');
2596 apply_ruleset
($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
2598 print "Firewall not active (status = $status)\n" if $verbose;