12 use PVE
::Tools
qw(run_command lock_file);
16 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
18 # todo: define more MACROS
19 # imported/converted from: /usr/share/shorewall/macro.*
22 { action
=> 'PARAM', proto
=> 'udp', dport
=> '10080' },
23 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10080' },
26 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '113' },
29 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '179' },
32 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6889' },
33 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
36 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6999' },
37 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
40 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2401' },
43 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1494' },
44 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1604' },
45 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2598' },
48 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3689' },
49 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3689' },
52 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6277' },
55 { action
=> 'PARAM', proto
=> 'udp', dport
=> '67:68', sport
=> '67:68' },
56 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '67:68', sport
=> '67:68' },
59 { action
=> 'PARAM', proto
=> 'udp', dport
=> '53' },
60 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '53' },
63 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3632' },
66 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '4662' },
67 { action
=> 'PARAM', proto
=> 'udp', dport
=> '4665' },
70 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '21' },
73 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '79' },
76 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2086' },
77 { action
=> 'PARAM', proto
=> 'udp', dport
=> '2086' },
78 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1080' },
79 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1080' },
82 { action
=> 'PARAM', proto
=> '47' },
83 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '47' },
86 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9418' },
89 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6346' },
90 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6346' },
93 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '11371' },
96 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
99 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
102 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3130' },
105 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5190' },
108 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '143' },
111 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '993' },
114 { action
=> 'PARAM', proto
=> '94' },
115 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '94' },
118 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '631' },
121 { action
=> 'PARAM', proto
=> 'udp', dport
=> '631' },
124 { action
=> 'PARAM', source
=> 'SOURCE', dest
=> 'DEST', proto
=> 'tcp', dport
=> '631' },
125 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '631' },
128 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
129 { action
=> 'PARAM', proto
=> '50' },
130 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '500', sport
=> '500' },
131 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '50' },
134 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
135 { action
=> 'PARAM', proto
=> '51' },
136 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '500', sport
=> '500' },
137 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '51' },
140 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500' },
141 { action
=> 'PARAM', proto
=> 'udp', dport
=> '4500' },
142 { action
=> 'PARAM', proto
=> '50' },
143 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '500' },
144 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '4500' },
145 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '50' },
148 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6667' },
151 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5222' },
154 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5223' },
157 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5269' },
160 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9100' },
163 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1701' },
164 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '1701' },
167 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '389' },
170 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '636' },
173 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1863' },
176 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1433' },
179 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
180 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
181 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
184 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '4949' },
187 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3306' },
190 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '119' },
193 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '563' },
196 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
199 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
200 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '123' },
203 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
204 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '123' },
207 { action
=> 'PARAM', proto
=> '89' },
210 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1194' },
213 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5632' },
214 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5631' },
217 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '110' },
220 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '995' },
223 { action
=> 'PARAM', proto
=> '47' },
224 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '47' },
225 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1723' },
228 { action
=> 'PARAM', proto
=> 'icmp', dport
=> '8' },
231 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5432' },
234 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '515' },
237 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3389' },
240 { action
=> 'PARAM', proto
=> 'udp', dport
=> '520' },
241 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '520' },
244 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '953' },
247 { action
=> 'ACCEPT', proto
=> 'tcp', dport
=> '2703' },
250 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
253 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '873' },
256 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6566' },
259 { action
=> 'PARAM', proto
=> 'udp', dport
=> '135,445' },
260 { action
=> 'PARAM', proto
=> 'udp', dport
=> '137:139' },
261 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
262 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '135,139,445' },
265 { action
=> 'PARAM', proto
=> 'udp', dport
=> '135,445' },
266 { action
=> 'PARAM', proto
=> 'udp', dport
=> '137:139' },
267 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
268 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '135,139,445' },
269 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '135,445' },
270 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '137:139' },
271 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
272 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'tcp', dport
=> '135,139,445' },
275 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '901' },
278 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
281 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
284 { action
=> 'PARAM', proto
=> 'udp', dport
=> '161:162' },
285 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '161' },
288 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '783' },
291 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '22' },
294 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3690' },
297 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3874' },
298 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3740' },
299 { action
=> 'PARAM', proto
=> '41' },
300 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5072,8374' },
303 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3128' },
306 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
309 { action
=> 'PARAM', proto
=> 'udp', dport
=> '514' },
310 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '514' },
313 { action
=> 'PARAM', proto
=> 'udp', dport
=> '69' },
316 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '23' },
319 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '992' },
322 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
325 { action
=> 'PARAM', proto
=> 'udp', dport
=> '33434:33524' },
326 { action
=> 'PARAM', proto
=> 'icmp', dport
=> '8' },
329 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5900:5909' },
332 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5500' },
335 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
336 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
339 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '8080' },
342 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10000' },
345 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '43' },
349 my $pve_fw_parsed_macros;
350 my $pve_fw_preferred_macro_names = {};
352 sub get_firewall_macros
{
354 return $pve_fw_parsed_macros if $pve_fw_parsed_macros;
356 $pve_fw_parsed_macros = {};
358 foreach my $k (keys %$pve_fw_macros) {
361 my $macro = $pve_fw_macros->{$k};
362 $pve_fw_preferred_macro_names->{$name} = $k;
363 $pve_fw_parsed_macros->{$name} = $macro;
366 return $pve_fw_parsed_macros;
371 sub get_etc_services
{
373 return $etc_services if $etc_services;
375 my $filename = "/etc/services";
377 my $fh = IO
::File-
>new($filename, O_RDONLY
);
379 warn "unable to read '$filename' - $!\n";
385 while (my $line = <$fh>) {
387 next if $line =~m/^#/;
388 next if ($line =~m/^\s*$/);
390 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
391 $services->{byid
}->{$2}->{name
} = $1;
392 $services->{byid
}->{$2}->{$3} = 1;
393 $services->{byname
}->{$1} = $services->{byid
}->{$2};
399 $etc_services = $services;
402 return $etc_services;
407 sub get_etc_protocols
{
408 return $etc_protocols if $etc_protocols;
410 my $filename = "/etc/protocols";
412 my $fh = IO
::File-
>new($filename, O_RDONLY
);
414 warn "unable to read '$filename' - $!\n";
420 while (my $line = <$fh>) {
422 next if $line =~m/^#/;
423 next if ($line =~m/^\s*$/);
425 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
426 $protocols->{byid
}->{$2}->{name
} = $1;
427 $protocols->{byname
}->{$1} = $protocols->{byid
}->{$2};
433 $etc_protocols = $protocols;
435 return $etc_protocols;
438 sub parse_address_list
{
442 foreach my $aor (split(/,/, $str)) {
443 if (!Net
::IP-
>new($aor)) {
444 my $err = Net
::IP
::Error
();
445 die "invalid IP address: $err\n";
453 sub parse_port_name_number_or_range
{
456 my $services = PVE
::Firewall
::get_etc_services
();
458 foreach my $item (split(/,/, $str)) {
460 foreach my $pon (split(':', $item, 2)) {
461 if ($pon =~ m/^\d+$/){
462 die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535;
464 die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname
}->{$pon};
473 my $bridge_firewall_enabled = 0;
475 sub enable_bridge_firewall
{
477 return if $bridge_firewall_enabled; # only once
479 system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables");
480 system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-ip6tables");
482 $bridge_firewall_enabled = 1;
485 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
490 run_command
("/sbin/iptables $cmd", outfunc
=> sub {}, errfunc
=> sub {});
493 sub iptables_restore_cmdlist
{
496 run_command
("/sbin/iptables-restore -n", input
=> $cmdlist);
499 sub iptables_get_chains
{
503 # check what chains we want to track
504 my $is_pvefw_chain = sub {
507 return 1 if $name =~ m/^PVEFW-\S+$/;
509 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
510 return 1 if $name =~ m/^vmbr\d+-(:?IN|OUT)$/;
511 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
521 return if $line =~ m/^#/;
522 return if $line =~ m/^\s*$/;
524 if ($line =~ m/^\*(\S+)$/) {
529 return if $table ne 'filter';
531 if ($line =~ m/^:(\S+)\s/) {
533 return if !&$is_pvefw_chain($chain);
534 $res->{$chain} = "unknown";
535 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
536 my ($chain, $sig) = ($1, $2);
537 return if !&$is_pvefw_chain($chain);
538 $res->{$chain} = $sig;
540 # simply ignore the rest
545 run_command
("/sbin/iptables-save", outfunc
=> $parser);
550 sub iptables_chain_exist
{
554 iptables
("-n --list $chain");
561 sub iptables_rule_exist
{
565 iptables
("-C $rule");
572 sub ruleset_generate_rule
{
573 my ($ruleset, $chain, $rule, $goto) = @_;
577 $cmd .= " -m iprange --src-range" if $rule->{nbsource
} && $rule->{nbsource
} > 1;
578 $cmd .= " -s $rule->{source}" if $rule->{source
};
579 $cmd .= " -m iprange --dst-range" if $rule->{nbdest
} && $rule->{nbdest
} > 1;
580 $cmd .= " -d $rule->{dest}" if $rule->{dest
};
581 $cmd .= " -p $rule->{proto}" if $rule->{proto
};
582 $cmd .= " --match multiport" if $rule->{nbdport
} && $rule->{nbdport
} > 1;
583 $cmd .= " --dport $rule->{dport}" if $rule->{dport
};
584 $cmd .= " --match multiport" if $rule->{nbsport
} && $rule->{nbsport
} > 1;
585 $cmd .= " --sport $rule->{sport}" if $rule->{sport
};
587 if (my $action = $rule->{action
}) {
588 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
589 $cmd .= $goto ?
" -g $action" : " -j $action";
592 ruleset_addrule
($ruleset, $chain, $cmd) if $cmd;
595 sub ruleset_create_chain
{
596 my ($ruleset, $chain) = @_;
598 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
600 die "chain '$chain' already exists\n" if $ruleset->{$chain};
602 $ruleset->{$chain} = [];
605 sub ruleset_chain_exist
{
606 my ($ruleset, $chain) = @_;
608 return $ruleset->{$chain} ?
1 : undef;
611 sub ruleset_addrule
{
612 my ($ruleset, $chain, $rule) = @_;
614 die "no such chain '$chain'\n" if !$ruleset->{$chain};
616 push @{$ruleset->{$chain}}, "-A $chain $rule";
619 sub ruleset_insertrule
{
620 my ($ruleset, $chain, $rule) = @_;
622 die "no such chain '$chain'\n" if !$ruleset->{$chain};
624 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
627 sub generate_bridge_chains
{
628 my ($ruleset, $bridge) = @_;
630 if (!ruleset_chain_exist
($ruleset, "PVEFW-BRIDGE-IN")){
631 ruleset_create_chain
($ruleset, "PVEFW-BRIDGE-IN");
634 if (!ruleset_chain_exist
($ruleset, "PVEFW-BRIDGE-OUT")){
635 ruleset_create_chain
($ruleset, "PVEFW-BRIDGE-OUT");
638 if (!ruleset_chain_exist
($ruleset, "PVEFW-FORWARD")){
639 ruleset_create_chain
($ruleset, "PVEFW-FORWARD");
641 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-m state --state RELATED,ESTABLISHED -j ACCEPT");
642 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-in --physdev-is-bridged -j PVEFW-BRIDGE-OUT");
643 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-out --physdev-is-bridged -j PVEFW-BRIDGE-IN");
646 if (!ruleset_chain_exist
($ruleset, "$bridge-IN")) {
647 ruleset_create_chain
($ruleset, "$bridge-IN");
648 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-i $bridge -j DROP"); # disable interbridge routing
649 ruleset_addrule
($ruleset, "PVEFW-BRIDGE-IN", "-j $bridge-IN");
650 ruleset_addrule
($ruleset, "$bridge-IN", "-j ACCEPT");
653 if (!ruleset_chain_exist
($ruleset, "$bridge-OUT")) {
654 ruleset_create_chain
($ruleset, "$bridge-OUT");
655 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-o $bridge -j DROP"); # disable interbridge routing
656 ruleset_addrule
($ruleset, "PVEFW-BRIDGE-OUT", "-j $bridge-OUT");
660 sub generate_tap_rules_direction
{
661 my ($ruleset, $group_rules, $iface, $netid, $macaddr, $rules, $bridge, $direction) = @_;
663 my $tapchain = "$iface-$direction";
665 ruleset_create_chain
($ruleset, $tapchain);
667 ruleset_addrule
($ruleset, $tapchain, "-m state --state INVALID -j DROP");
668 ruleset_addrule
($ruleset, $tapchain, "-m state --state RELATED,ESTABLISHED -j ACCEPT");
670 if ($direction eq 'OUT' && defined($macaddr)) {
671 ruleset_addrule
($ruleset, $tapchain, "-m mac ! --mac-source $macaddr -j DROP");
675 foreach my $rule (@$rules) {
676 next if $rule->{iface
} && $rule->{iface
} ne $netid;
677 # we go to $bridge-IN if accept in out rules
678 if($rule->{action
} =~ m/^(GROUP-(\S+))$/){
679 $rule->{action
} .= "-$direction";
680 # generate empty group rule if don't exist
681 if(!ruleset_chain_exist
($ruleset, $rule->{action
})){
682 generate_group_rules
($ruleset, $group_rules, $2);
684 ruleset_generate_rule
($ruleset, $tapchain, $rule);
685 ruleset_addrule
($ruleset, $tapchain, "-m mark --mark 1 -g $bridge-IN")
686 if $direction eq 'OUT';
688 $rule->{action
} = "$bridge-IN" if $rule->{action
} eq 'ACCEPT' && $direction eq 'OUT';
689 ruleset_generate_rule
($ruleset, $tapchain, $rule);
694 ruleset_addrule
($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-dropped: \" --log-level 4");
695 ruleset_addrule
($ruleset, $tapchain, "-j DROP");
697 # plug the tap chain to bridge chain
698 my $physdevdirection = $direction eq 'IN' ?
"out" : "in";
699 my $rule = "-m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain";
700 ruleset_insertrule
($ruleset, "$bridge-$direction", $rule);
702 if ($direction eq 'OUT'){
703 # add tap->host rules
704 my $rule = "-m physdev --physdev-$physdevdirection $iface -j $tapchain";
705 ruleset_addrule
($ruleset, "PVEFW-INPUT", $rule);
710 my ($ruleset, $rules, $group_rules) = @_;
712 # fixme: allow security groups
714 # host inbound firewall
715 my $chain = "PVEFW-HOST-IN";
716 ruleset_create_chain
($ruleset, $chain);
718 ruleset_addrule
($ruleset, $chain, "-m state --state INVALID -j DROP");
719 ruleset_addrule
($ruleset, $chain, "-m state --state RELATED,ESTABLISHED -j ACCEPT");
720 ruleset_addrule
($ruleset, $chain, "-i lo -j ACCEPT");
721 ruleset_addrule
($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
722 ruleset_addrule
($ruleset, $chain, "-p udp -m state --state NEW -m multiport --dports 5404,5405 -j ACCEPT");
723 ruleset_addrule
($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
726 foreach my $rule (@{$rules->{in}}) {
727 # we use RETURN because we need to check also tap rules
728 $rule->{action
} = 'RETURN' if $rule->{action
} eq 'ACCEPT';
729 ruleset_generate_rule
($ruleset, $chain, $rule);
733 ruleset_addrule
($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-IN dropped: \" --log-level 4");
734 ruleset_addrule
($ruleset, $chain, "-j DROP");
736 # host outbound firewall
737 $chain = "PVEFW-HOST-OUT";
738 ruleset_create_chain
($ruleset, $chain);
740 ruleset_addrule
($ruleset, $chain, "-m state --state INVALID -j DROP");
741 ruleset_addrule
($ruleset, $chain, "-m state --state RELATED,ESTABLISHED -j ACCEPT");
742 ruleset_addrule
($ruleset, $chain, "-o lo -j ACCEPT");
743 ruleset_addrule
($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
744 ruleset_addrule
($ruleset, $chain, "-p udp -m state --state NEW -m multiport --dports 5404,5405 -j ACCEPT");
745 ruleset_addrule
($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
748 foreach my $rule (@{$rules->{out
}}) {
749 # we use RETURN because we need to check also tap rules
750 $rule->{action
} = 'RETURN' if $rule->{action
} eq 'ACCEPT';
751 ruleset_generate_rule
($ruleset, $chain, $rule);
755 ruleset_addrule
($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-OUT dropped: \" --log-level 4");
756 ruleset_addrule
($ruleset, $chain, "-j DROP");
758 ruleset_addrule
($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
759 ruleset_addrule
($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
762 sub generate_group_rules
{
763 my ($ruleset, $group_rules, $group) = @_;
765 my $rules = $group_rules->{$group};
767 die "no such security group '$group'\n" if !$rules;
769 my $chain = "GROUP-${group}-IN";
771 ruleset_create_chain
($ruleset, $chain);
774 foreach my $rule (@{$rules->{in}}) {
775 ruleset_generate_rule
($ruleset, $chain, $rule);
779 $chain = "GROUP-${group}-OUT";
781 ruleset_create_chain
($ruleset, $chain);
782 ruleset_addrule
($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
785 foreach my $rule (@{$rules->{out
}}) {
786 # we go the PVEFW-SET-ACCEPT-MARK Instead of ACCEPT) because we need to
787 # check also other tap rules (and group rules can be set on any bridge,
788 # so we can't go to VMBRXX-IN)
789 $rule->{action
} = 'PVEFW-SET-ACCEPT-MARK' if $rule->{action
} eq 'ACCEPT';
790 ruleset_generate_rule
($ruleset, $chain, $rule);
796 my $valid_netdev_names = {};
797 for (my $i = 0; $i < $MAX_NETS; $i++) {
798 $valid_netdev_names->{"net$i"} = 1;
802 my ($line, $need_iface, $allow_groups) = @_;
804 my $macros = get_firewall_macros
();
805 my $protocols = get_etc_protocols
();
807 my ($action, $iface, $source, $dest, $proto, $dport, $sport);
811 my @data = split(/\s+/, $line);
812 my $expected_elements = $need_iface ?
7 : 6;
814 die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
817 ($action, $iface, $source, $dest, $proto, $dport, $sport) = @data
819 ($action, $source, $dest, $proto, $dport, $sport) = @data;
822 die "incomplete rule\n" if !$action;
827 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
829 } elsif ($allow_groups && $action =~ m/^GROUP-(:?\S+)$/) {
831 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
832 ($macro_name, $action) = ($1, $2);
833 my $lc_macro_name = lc($macro_name);
834 my $preferred_name = $pve_fw_preferred_macro_names->{$lc_macro_name};
835 $macro_name = $preferred_name if $preferred_name;
836 $macro = $macros->{$lc_macro_name};
837 die "unknown macro '$macro_name'\n" if !$macro;
839 die "unknown action '$action'\n";
843 $iface = undef if $iface && $iface eq '-';
844 die "unknown interface '$iface'\n"
845 if defined($iface) && !$valid_netdev_names->{$iface};
848 $proto = undef if $proto && $proto eq '-';
849 die "unknown protokol '$proto'\n" if $proto &&
850 !(defined($protocols->{byname
}->{$proto}) ||
851 defined($protocols->{byid
}->{$proto}));
853 $source = undef if $source && $source eq '-';
854 $dest = undef if $dest && $dest eq '-';
856 $dport = undef if $dport && $dport eq '-';
857 $sport = undef if $sport && $sport eq '-';
859 my $nbsource = undef;
862 $nbsource = parse_address_list
($source) if $source;
863 $nbdest = parse_address_list
($dest) if $dest;
872 nbsource
=> $nbsource,
880 foreach my $templ (@$macro) {
882 foreach my $k (keys %$templ) {
883 my $v = $templ->{$k};
886 } elsif ($v eq 'DEST') {
888 } elsif ($v eq 'SOURCE') {
889 $v = $param->{source
};
892 die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
898 push @$rules, $param;
901 foreach my $rule (@$rules) {
902 $rule->{nbdport
} = parse_port_name_number_or_range
($rule->{dport
})
903 if defined($rule->{dport
});
904 $rule->{nbsport
} = parse_port_name_number_or_range
($rule->{sport
})
905 if defined($rule->{sport
});
911 sub parse_vm_fw_rules
{
912 my ($filename, $fh) = @_;
914 my $res = { in => [], out
=> [] };
918 while (defined(my $line = <$fh>)) {
919 next if $line =~ m/^#/;
920 next if $line =~ m/^\s*$/;
922 my $linenr = $fh->input_line_number();
923 my $prefix = "$filename (line $linenr)";
925 if ($line =~ m/^\[(in|out)\]\s*$/i) {
930 warn "$prefix: skip line - no section";
935 eval { $rules = parse_fw_rule
($line, 1, 1); };
937 warn "$prefix: $err";
941 push @{$res->{$section}}, @$rules;
947 sub parse_host_fw_rules
{
948 my ($filename, $fh) = @_;
950 my $res = { in => [], out
=> [] };
954 while (defined(my $line = <$fh>)) {
955 next if $line =~ m/^#/;
956 next if $line =~ m/^\s*$/;
958 my $linenr = $fh->input_line_number();
959 my $prefix = "$filename (line $linenr)";
961 if ($line =~ m/^\[(in|out)\]\s*$/i) {
966 warn "$prefix: skip line - no section";
971 eval { $rules = parse_fw_rule
($line, 1, 1); };
973 warn "$prefix: $err";
977 push @{$res->{$section}}, @$rules;
983 sub parse_group_fw_rules
{
984 my ($filename, $fh) = @_;
989 my $res = { in => [], out
=> [] };
991 while (defined(my $line = <$fh>)) {
992 next if $line =~ m/^#/;
993 next if $line =~ m/^\s*$/;
995 my $linenr = $fh->input_line_number();
996 my $prefix = "$filename (line $linenr)";
998 if ($line =~ m/^\[(in|out):(\S+)\]\s*$/i) {
1003 if (!$section || !$group) {
1004 warn "$prefix: skip line - no section";
1009 eval { $rules = parse_fw_rule
($line, 0, 0); };
1011 warn "$prefix: $err";
1015 push @{$res->{$group}->{$section}}, @$rules;
1022 my ($code, @param) = @_;
1026 my $res = lock_file
($pve_fw_lock_filename, $timeout, $code, @param);
1033 sub read_local_vm_config
{
1039 my $list = PVE
::QemuServer
::config_list
();
1041 foreach my $vmid (keys %$list) {
1042 my $cfspath = PVE
::QemuServer
::cfs_config_path
($vmid);
1043 if (my $conf = PVE
::Cluster
::cfs_read_file
($cfspath)) {
1044 $qemu->{$vmid} = $conf;
1048 my $vmdata = { openvz
=> $openvz, qemu
=> $qemu };
1053 sub read_vm_firewall_rules
{
1056 foreach my $vmid (keys %{$vmdata->{qemu
}}, keys %{$vmdata->{openvz
}}) {
1057 my $filename = "/etc/pve/firewall/$vmid.fw";
1058 my $fh = IO
::File-
>new($filename, O_RDONLY
);
1061 $rules->{$vmid} = parse_vm_fw_rules
($filename, $fh);
1068 my $vmdata = read_local_vm_config
();
1069 my $rules = read_vm_firewall_rules
($vmdata);
1071 my $group_rules = {};
1072 my $filename = "/etc/pve/firewall/groups.fw";
1073 if (my $fh = IO
::File-
>new($filename, O_RDONLY
)) {
1074 $group_rules = parse_group_fw_rules
($filename, $fh);
1077 #print Dumper($rules);
1081 # setup host firewall rules
1082 ruleset_create_chain
($ruleset, "PVEFW-INPUT");
1083 ruleset_create_chain
($ruleset, "PVEFW-OUTPUT");
1085 ruleset_create_chain
($ruleset, "PVEFW-SET-ACCEPT-MARK");
1086 ruleset_addrule
($ruleset, "PVEFW-SET-ACCEPT-MARK", "-j MARK --set-mark 1");
1088 $filename = "/etc/pve/local/host.fw";
1089 if (my $fh = IO
::File-
>new($filename, O_RDONLY
)) {
1090 my $host_rules = parse_host_fw_rules
($filename, $fh);
1091 enablehostfw
($ruleset, $host_rules, $group_rules);
1094 # generate firewall rules for QEMU VMs
1095 foreach my $vmid (keys %{$vmdata->{qemu
}}) {
1096 my $conf = $vmdata->{qemu
}->{$vmid};
1097 next if !$rules->{$vmid};
1099 foreach my $netid (keys %$conf) {
1100 next if $netid !~ m/^net(\d+)$/;
1101 my $net = PVE
::QemuServer
::parse_net
($conf->{$netid});
1103 my $iface = "tap${vmid}i$1";
1105 my $bridge = $net->{bridge
};
1106 next if !$bridge; # fixme: ?
1108 $bridge .= "v$net->{tag}" if $net->{tag
};
1110 generate_bridge_chains
($ruleset, $bridge);
1112 my $macaddr = $net->{macaddr
};
1113 generate_tap_rules_direction
($ruleset, $group_rules, $iface, $netid, $macaddr, $rules->{$vmid}->{in}, $bridge, 'IN');
1114 generate_tap_rules_direction
($ruleset, $group_rules, $iface, $netid, $macaddr, $rules->{$vmid}->{out
}, $bridge, 'OUT');
1120 sub get_ruleset_status
{
1121 my ($ruleset, $verbose) = @_;
1123 my $active_chains = iptables_get_chains
();
1125 my $statushash = {};
1127 foreach my $chain (sort keys %$ruleset) {
1128 my $digest = Digest
::SHA-
>new('sha1');
1129 foreach my $cmd (@{$ruleset->{$chain}}) {
1130 $digest->add("$cmd\n");
1132 my $sig = $digest->b64digest;
1133 $statushash->{$chain}->{sig
} = $sig;
1135 my $oldsig = $active_chains->{$chain};
1136 if (!defined($oldsig)) {
1137 $statushash->{$chain}->{action
} = 'create';
1139 if ($oldsig eq $sig) {
1140 $statushash->{$chain}->{action
} = 'exists';
1142 $statushash->{$chain}->{action
} = 'update';
1145 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
1146 foreach my $cmd (@{$ruleset->{$chain}}) {
1147 print "\t$cmd\n" if $verbose;
1151 foreach my $chain (sort keys %$active_chains) {
1152 if (!defined($ruleset->{$chain})) {
1153 my $sig = $active_chains->{$chain};
1154 $statushash->{$chain}->{action
} = 'delete';
1155 $statushash->{$chain}->{sig
} = $sig;
1156 print "delete $chain ($sig)\n" if $verbose;
1166 get_ruleset_status
($ruleset, 1);
1169 sub print_sig_rule
{
1170 my ($chain, $sig) = @_;
1172 # We just use this to store a SHA1 checksum used to detect changes
1173 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
1177 my ($ruleset, $verbose) = @_;
1179 enable_bridge_firewall();
1181 my $cmdlist = "*filter
\n"; # we pass this to iptables-restore;
1183 my $statushash = get_ruleset_status($ruleset, $verbose);
1185 # create missing chains first
1186 foreach my $chain (sort keys %$ruleset) {
1187 my $stat = $statushash->{$chain};
1188 die "internal error
" if !$stat;
1189 next if $stat->{action} ne 'create';
1191 $cmdlist .= ":$chain - [0:0]\n";
1194 my $rule = "INPUT
-j PVEFW-INPUT
";
1195 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1196 $cmdlist .= "-A
$rule\n";
1198 $rule = "OUTPUT
-j PVEFW-OUTPUT
";
1199 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1200 $cmdlist .= "-A
$rule\n";
1203 $rule = "FORWARD
-j PVEFW-FORWARD
";
1204 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1205 $cmdlist .= "-A
$rule\n";
1208 foreach my $chain (sort keys %$ruleset) {
1209 my $stat = $statushash->{$chain};
1210 die "internal error
" if !$stat;
1212 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
1213 $cmdlist .= "-F
$chain\n";
1214 foreach my $cmd (@{$ruleset->{$chain}}) {
1215 $cmdlist .= "$cmd\n";
1217 $cmdlist .= print_sig_rule($chain, $stat->{sig});
1218 } elsif ($stat->{action} eq 'delete') {
1219 die "internal error
"; # this should not happen
1220 } elsif ($stat->{action} eq 'exists') {
1223 die "internal error
- unknown status
'$stat->{action}'";
1227 foreach my $chain (keys %$statushash) {
1228 next if $statushash->{$chain}->{action} ne 'delete';
1229 $cmdlist .= "-F
$chain\n";
1231 foreach my $chain (keys %$statushash) {
1232 next if $statushash->{$chain}->{action} ne 'delete';
1233 $cmdlist .= "-X
$chain\n";
1236 $cmdlist .= "COMMIT
\n";
1238 print $cmdlist if $verbose;
1240 iptables_restore_cmdlist($cmdlist);
1242 # test: re-read status and check if everything is up to date
1243 $statushash = get_ruleset_status($ruleset);
1246 foreach my $chain (sort keys %$ruleset) {
1247 my $stat = $statushash->{$chain};
1248 if ($stat->{action} ne 'exists') {
1249 warn "unable to update chain
'$chain'\n";
1254 die "unable to apply firewall changes
\n" if $errors;