12 use PVE
::Tools
qw(run_command lock_file);
16 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
18 # imported/converted from: /usr/share/shorewall/macro.*
21 { action
=> 'PARAM', proto
=> 'udp', dport
=> '10080' },
22 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10080' },
25 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '113' },
28 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '179' },
31 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6889' },
32 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
35 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6999' },
36 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
39 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2401' },
42 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1494' },
43 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1604' },
44 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2598' },
47 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3689' },
48 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3689' },
51 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6277' },
54 { action
=> 'PARAM', proto
=> 'udp', dport
=> '67:68', sport
=> '67:68' },
55 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '67:68', sport
=> '67:68' },
58 { action
=> 'PARAM', proto
=> 'udp', dport
=> '53' },
59 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '53' },
62 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3632' },
65 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '4662' },
66 { action
=> 'PARAM', proto
=> 'udp', dport
=> '4665' },
69 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '21' },
72 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '79' },
75 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2086' },
76 { action
=> 'PARAM', proto
=> 'udp', dport
=> '2086' },
77 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1080' },
78 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1080' },
81 { action
=> 'PARAM', proto
=> '47' },
82 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '47' },
85 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9418' },
88 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6346' },
89 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6346' },
92 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '11371' },
95 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
98 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
101 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3130' },
104 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5190' },
107 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '143' },
110 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '993' },
113 { action
=> 'PARAM', proto
=> '94' },
114 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '94' },
117 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '631' },
120 { action
=> 'PARAM', proto
=> 'udp', dport
=> '631' },
123 { action
=> 'PARAM', source
=> 'SOURCE', dest
=> 'DEST', proto
=> 'tcp', dport
=> '631' },
124 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '631' },
127 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
128 { action
=> 'PARAM', proto
=> '50' },
129 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '500', sport
=> '500' },
130 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '50' },
133 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
134 { action
=> 'PARAM', proto
=> '51' },
135 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '500', sport
=> '500' },
136 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '51' },
139 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500' },
140 { action
=> 'PARAM', proto
=> 'udp', dport
=> '4500' },
141 { action
=> 'PARAM', proto
=> '50' },
142 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '500' },
143 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '4500' },
144 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '50' },
147 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6667' },
150 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5222' },
153 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5223' },
156 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5269' },
159 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9100' },
162 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1701' },
163 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '1701' },
166 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '389' },
169 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '636' },
172 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1863' },
175 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1433' },
178 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
179 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
180 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
183 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '4949' },
186 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3306' },
189 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '119' },
192 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '563' },
195 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
198 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
199 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '123' },
202 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
203 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '123' },
206 { action
=> 'PARAM', proto
=> '89' },
209 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1194' },
212 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5632' },
213 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5631' },
216 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '110' },
219 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '995' },
222 { action
=> 'PARAM', proto
=> '47' },
223 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '47' },
224 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1723' },
227 { action
=> 'PARAM', proto
=> 'icmp', dport
=> '8' },
230 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5432' },
233 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '515' },
236 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3389' },
239 { action
=> 'PARAM', proto
=> 'udp', dport
=> '520' },
240 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '520' },
243 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '953' },
246 { action
=> 'ACCEPT', proto
=> 'tcp', dport
=> '2703' },
249 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
252 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '873' },
255 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6566' },
258 { action
=> 'PARAM', proto
=> 'udp', dport
=> '135,445' },
259 { action
=> 'PARAM', proto
=> 'udp', dport
=> '137:139' },
260 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
261 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '135,139,445' },
264 { action
=> 'PARAM', proto
=> 'udp', dport
=> '135,445' },
265 { action
=> 'PARAM', proto
=> 'udp', dport
=> '137:139' },
266 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
267 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '135,139,445' },
268 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '135,445' },
269 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '137:139' },
270 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
271 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'tcp', dport
=> '135,139,445' },
274 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '901' },
277 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
280 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
283 { action
=> 'PARAM', proto
=> 'udp', dport
=> '161:162' },
284 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '161' },
287 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '783' },
290 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '22' },
293 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3690' },
296 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3874' },
297 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3740' },
298 { action
=> 'PARAM', proto
=> '41' },
299 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5072,8374' },
302 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3128' },
305 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
308 { action
=> 'PARAM', proto
=> 'udp', dport
=> '514' },
309 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '514' },
312 { action
=> 'PARAM', proto
=> 'udp', dport
=> '69' },
315 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '23' },
318 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '992' },
321 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
324 { action
=> 'PARAM', proto
=> 'udp', dport
=> '33434:33524' },
325 { action
=> 'PARAM', proto
=> 'icmp', dport
=> '8' },
328 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5900:5909' },
331 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5500' },
334 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
335 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
338 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '8080' },
341 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10000' },
344 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '43' },
348 my $pve_fw_parsed_macros;
349 my $pve_fw_preferred_macro_names = {};
351 sub get_firewall_macros
{
353 return $pve_fw_parsed_macros if $pve_fw_parsed_macros;
355 $pve_fw_parsed_macros = {};
357 foreach my $k (keys %$pve_fw_macros) {
360 my $macro = $pve_fw_macros->{$k};
361 $pve_fw_preferred_macro_names->{$name} = $k;
362 $pve_fw_parsed_macros->{$name} = $macro;
365 return $pve_fw_parsed_macros;
370 sub get_etc_services
{
372 return $etc_services if $etc_services;
374 my $filename = "/etc/services";
376 my $fh = IO
::File-
>new($filename, O_RDONLY
);
378 warn "unable to read '$filename' - $!\n";
384 while (my $line = <$fh>) {
386 next if $line =~m/^#/;
387 next if ($line =~m/^\s*$/);
389 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
390 $services->{byid
}->{$2}->{name
} = $1;
391 $services->{byid
}->{$2}->{port
} = $2;
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)) {
461 foreach my $pon (split(':', $item, 2)) {
462 $pon = $services->{byname
}->{$pon}->{port
} if $services->{byname
}->{$pon}->{port
};
463 if ($pon =~ m/^\d+$/){
464 die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535;
465 die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon);
468 die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname
}->{$pon};
477 my $bridge_firewall_enabled = 0;
479 sub enable_bridge_firewall
{
481 return if $bridge_firewall_enabled; # only once
483 system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables");
484 system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-ip6tables");
486 $bridge_firewall_enabled = 1;
489 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
494 run_command
("/sbin/iptables $cmd", outfunc
=> sub {}, errfunc
=> sub {});
497 sub iptables_restore_cmdlist
{
500 run_command
("/sbin/iptables-restore -n", input
=> $cmdlist);
503 sub iptables_get_chains
{
507 # check what chains we want to track
508 my $is_pvefw_chain = sub {
511 return 1 if $name =~ m/^PVEFW-\S+$/;
513 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
514 return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT)$/;
515 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
525 return if $line =~ m/^#/;
526 return if $line =~ m/^\s*$/;
528 if ($line =~ m/^\*(\S+)$/) {
533 return if $table ne 'filter';
535 if ($line =~ m/^:(\S+)\s/) {
537 return if !&$is_pvefw_chain($chain);
538 $res->{$chain} = "unknown";
539 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
540 my ($chain, $sig) = ($1, $2);
541 return if !&$is_pvefw_chain($chain);
542 $res->{$chain} = $sig;
544 # simply ignore the rest
549 run_command
("/sbin/iptables-save", outfunc
=> $parser);
554 sub iptables_chain_exist
{
558 iptables
("-n --list $chain");
565 sub iptables_rule_exist
{
569 iptables
("-C $rule");
576 sub ruleset_generate_rule
{
577 my ($ruleset, $chain, $rule, $goto) = @_;
581 $cmd .= " -m iprange --src-range" if $rule->{nbsource
} && $rule->{nbsource
} > 1;
582 $cmd .= " -s $rule->{source}" if $rule->{source
};
583 $cmd .= " -m iprange --dst-range" if $rule->{nbdest
} && $rule->{nbdest
} > 1;
584 $cmd .= " -d $rule->{dest}" if $rule->{dest
};
585 $cmd .= " -p $rule->{proto}" if $rule->{proto
};
586 $cmd .= " --match multiport" if $rule->{nbdport
} && $rule->{nbdport
} > 1;
587 $cmd .= " --dport $rule->{dport}" if $rule->{dport
};
588 $cmd .= " --match multiport" if $rule->{nbsport
} && $rule->{nbsport
} > 1;
589 $cmd .= " --sport $rule->{sport}" if $rule->{sport
};
591 if (my $action = $rule->{action
}) {
592 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
593 $cmd .= $goto ?
" -g $action" : " -j $action";
596 ruleset_addrule
($ruleset, $chain, $cmd) if $cmd;
599 sub ruleset_create_chain
{
600 my ($ruleset, $chain) = @_;
602 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
604 die "chain '$chain' already exists\n" if $ruleset->{$chain};
606 $ruleset->{$chain} = [];
609 sub ruleset_chain_exist
{
610 my ($ruleset, $chain) = @_;
612 return $ruleset->{$chain} ?
1 : undef;
615 sub ruleset_addrule
{
616 my ($ruleset, $chain, $rule) = @_;
618 die "no such chain '$chain'\n" if !$ruleset->{$chain};
620 push @{$ruleset->{$chain}}, "-A $chain $rule";
623 sub ruleset_insertrule
{
624 my ($ruleset, $chain, $rule) = @_;
626 die "no such chain '$chain'\n" if !$ruleset->{$chain};
628 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
631 sub generate_bridge_chains
{
632 my ($ruleset, $bridge) = @_;
634 if (!ruleset_chain_exist
($ruleset, "PVEFW-FORWARD")){
635 ruleset_create_chain
($ruleset, "PVEFW-FORWARD");
636 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
639 if (!ruleset_chain_exist
($ruleset, "$bridge-FW")) {
640 ruleset_create_chain
($ruleset, "$bridge-FW");
641 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
642 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
643 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-o $bridge -j DROP"); # disable interbridge routing
644 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-i $bridge -j DROP"); # disable interbridge routing
647 if (!ruleset_chain_exist
($ruleset, "$bridge-OUT")) {
648 ruleset_create_chain
($ruleset, "$bridge-OUT");
649 ruleset_addrule
($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-in -j $bridge-OUT");
652 if (!ruleset_chain_exist
($ruleset, "$bridge-IN")) {
653 ruleset_create_chain
($ruleset, "$bridge-IN");
654 ruleset_addrule
($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j $bridge-IN");
655 ruleset_addrule
($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
659 sub generate_tap_rules_direction
{
660 my ($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, $direction) = @_;
662 my $rules = $vmfw_conf->{lc($direction)};
663 my $options = $vmfw_conf->{options
};
665 my $tapchain = "$iface-$direction";
667 ruleset_create_chain
($ruleset, $tapchain);
669 ruleset_addrule
($ruleset, $tapchain, "-m conntrack --ctstate INVALID -j DROP");
670 ruleset_addrule
($ruleset, $tapchain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
672 if ($direction eq 'OUT' && defined($macaddr)) {
673 ruleset_addrule
($ruleset, $tapchain, "-m mac ! --mac-source $macaddr -j DROP");
677 foreach my $rule (@$rules) {
678 next if $rule->{iface
} && $rule->{iface
} ne $netid;
679 # we go to $bridge-IN if accept in out rules
680 if($rule->{action
} =~ m/^(GROUP-(\S+))$/){
681 $rule->{action
} .= "-$direction";
682 # generate empty group rule if don't exist
683 if(!ruleset_chain_exist
($ruleset, $rule->{action
})){
684 generate_group_rules
($ruleset, $group_rules, $2);
686 ruleset_generate_rule
($ruleset, $tapchain, $rule);
687 ruleset_addrule
($ruleset, $tapchain, "-m mark --mark 1 -j RETURN")
688 if $direction eq 'OUT';
690 $rule->{action
} = "PVEFW-SET-ACCEPT-MARK" if $rule->{action
} eq 'ACCEPT' && $direction eq 'OUT';
691 ruleset_generate_rule
($ruleset, $tapchain, $rule);
699 if ($direction eq 'OUT') {
700 $policy = $options->{'policy-out'} || 'ACCEPT'; # allow everything by default
702 $policy = $options->{'policy-in'} || 'DROP'; # allow everything by default
705 if ($policy eq 'ACCEPT') {
706 if ($direction eq 'OUT') {
707 ruleset_addrule
($ruleset, $tapchain, "-g PVEFW-SET-ACCEPT-MARK");
709 ruleset_addrule
($ruleset, $tapchain, "-j ACCEPT");
711 } elsif ($policy eq 'DROP') {
712 ruleset_addrule
($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-dropped: \" --log-level 4");
713 ruleset_addrule
($ruleset, $tapchain, "-j DROP");
714 } elsif ($policy eq 'REJECT') {
715 ruleset_addrule
($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-reject: \" --log-level 4");
716 ruleset_addrule
($ruleset, $tapchain, "-j REJECT");
719 die "internal error: unknown policy '$policy'";
722 # plug the tap chain to bridge chain
723 my $physdevdirection = $direction eq 'IN' ?
"out" : "in";
724 my $rule = "-m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain";
725 ruleset_insertrule
($ruleset, "$bridge-$direction", $rule);
727 if ($direction eq 'OUT'){
728 # add tap->host rules
729 my $rule = "-m physdev --physdev-$physdevdirection $iface -j $tapchain";
730 ruleset_addrule
($ruleset, "PVEFW-INPUT", $rule);
735 my ($ruleset, $rules, $group_rules) = @_;
737 # fixme: allow security groups
739 # host inbound firewall
740 my $chain = "PVEFW-HOST-IN";
741 ruleset_create_chain
($ruleset, $chain);
743 ruleset_addrule
($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
744 ruleset_addrule
($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
745 ruleset_addrule
($ruleset, $chain, "-i lo -j ACCEPT");
746 ruleset_addrule
($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
747 ruleset_addrule
($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
748 ruleset_addrule
($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
751 foreach my $rule (@{$rules->{in}}) {
752 # we use RETURN because we need to check also tap rules
753 $rule->{action
} = 'RETURN' if $rule->{action
} eq 'ACCEPT';
754 ruleset_generate_rule
($ruleset, $chain, $rule);
758 ruleset_addrule
($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-IN dropped: \" --log-level 4");
759 ruleset_addrule
($ruleset, $chain, "-j DROP");
761 # host outbound firewall
762 $chain = "PVEFW-HOST-OUT";
763 ruleset_create_chain
($ruleset, $chain);
765 ruleset_addrule
($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
766 ruleset_addrule
($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
767 ruleset_addrule
($ruleset, $chain, "-o lo -j ACCEPT");
768 ruleset_addrule
($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
769 ruleset_addrule
($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
770 ruleset_addrule
($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
773 foreach my $rule (@{$rules->{out
}}) {
774 # we use RETURN because we need to check also tap rules
775 $rule->{action
} = 'RETURN' if $rule->{action
} eq 'ACCEPT';
776 ruleset_generate_rule
($ruleset, $chain, $rule);
780 ruleset_addrule
($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-OUT dropped: \" --log-level 4");
781 ruleset_addrule
($ruleset, $chain, "-j DROP");
783 ruleset_addrule
($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
784 ruleset_addrule
($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
787 sub generate_group_rules
{
788 my ($ruleset, $group_rules, $group) = @_;
790 my $rules = $group_rules->{$group};
792 die "no such security group '$group'\n" if !$rules;
794 my $chain = "GROUP-${group}-IN";
796 ruleset_create_chain
($ruleset, $chain);
799 foreach my $rule (@{$rules->{in}}) {
800 ruleset_generate_rule
($ruleset, $chain, $rule);
804 $chain = "GROUP-${group}-OUT";
806 ruleset_create_chain
($ruleset, $chain);
807 ruleset_addrule
($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
810 foreach my $rule (@{$rules->{out
}}) {
811 # we go the PVEFW-SET-ACCEPT-MARK Instead of ACCEPT) because we need to
812 # check also other tap rules (and group rules can be set on any bridge,
813 # so we can't go to VMBRXX-IN)
814 $rule->{action
} = 'PVEFW-SET-ACCEPT-MARK' if $rule->{action
} eq 'ACCEPT';
815 ruleset_generate_rule
($ruleset, $chain, $rule);
821 my $valid_netdev_names = {};
822 for (my $i = 0; $i < $MAX_NETS; $i++) {
823 $valid_netdev_names->{"net$i"} = 1;
827 my ($line, $need_iface, $allow_groups) = @_;
829 my $macros = get_firewall_macros
();
830 my $protocols = get_etc_protocols
();
832 my ($action, $iface, $source, $dest, $proto, $dport, $sport);
836 my @data = split(/\s+/, $line);
837 my $expected_elements = $need_iface ?
7 : 6;
839 die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
842 ($action, $iface, $source, $dest, $proto, $dport, $sport) = @data
844 ($action, $source, $dest, $proto, $dport, $sport) = @data;
847 die "incomplete rule\n" if !$action;
852 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
854 } elsif ($allow_groups && $action =~ m/^GROUP-(:?\S+)$/) {
856 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
857 ($macro_name, $action) = ($1, $2);
858 my $lc_macro_name = lc($macro_name);
859 my $preferred_name = $pve_fw_preferred_macro_names->{$lc_macro_name};
860 $macro_name = $preferred_name if $preferred_name;
861 $macro = $macros->{$lc_macro_name};
862 die "unknown macro '$macro_name'\n" if !$macro;
864 die "unknown action '$action'\n";
868 $iface = undef if $iface && $iface eq '-';
869 die "unknown interface '$iface'\n"
870 if defined($iface) && !$valid_netdev_names->{$iface};
873 $proto = undef if $proto && $proto eq '-';
874 die "unknown protokol '$proto'\n" if $proto &&
875 !(defined($protocols->{byname
}->{$proto}) ||
876 defined($protocols->{byid
}->{$proto}));
878 $source = undef if $source && $source eq '-';
879 $dest = undef if $dest && $dest eq '-';
881 $dport = undef if $dport && $dport eq '-';
882 $sport = undef if $sport && $sport eq '-';
884 my $nbsource = undef;
887 $nbsource = parse_address_list
($source) if $source;
888 $nbdest = parse_address_list
($dest) if $dest;
897 nbsource
=> $nbsource,
905 foreach my $templ (@$macro) {
907 foreach my $k (keys %$templ) {
908 my $v = $templ->{$k};
911 } elsif ($v eq 'DEST') {
913 } elsif ($v eq 'SOURCE') {
914 $v = $param->{source
};
917 die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
923 push @$rules, $param;
926 foreach my $rule (@$rules) {
927 $rule->{nbdport
} = parse_port_name_number_or_range
($rule->{dport
})
928 if defined($rule->{dport
});
929 $rule->{nbsport
} = parse_port_name_number_or_range
($rule->{sport
})
930 if defined($rule->{sport
});
936 sub parse_fw_option
{
941 if ($line =~ m/^enable:\s*(0|1)\s*$/i) {
944 } elsif ($line =~ m/^(policy-(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
949 die "can't parse option '$line'\n"
952 return ($opt, $value);
955 sub parse_vm_fw_rules
{
956 my ($filename, $fh) = @_;
958 my $res = { in => [], out
=> [], options
=> {}};
962 while (defined(my $line = <$fh>)) {
963 next if $line =~ m/^#/;
964 next if $line =~ m/^\s*$/;
966 my $linenr = $fh->input_line_number();
967 my $prefix = "$filename (line $linenr)";
969 if ($line =~ m/^\[(\S+)\]\s*$/i) {
971 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
975 warn "$prefix: skip line - no section";
979 next if !$res->{$section}; # skip undefined section
981 if ($section eq 'options') {
983 my ($opt, $value) = parse_fw_option
($line);
984 $res->{options
}->{$opt} = $value;
986 warn "$prefix: $@" if $@;
991 eval { $rules = parse_fw_rule
($line, 1, 1); };
993 warn "$prefix: $err";
997 push @{$res->{$section}}, @$rules;
1003 sub parse_host_fw_rules
{
1004 my ($filename, $fh) = @_;
1006 my $res = { in => [], out
=> [] };
1010 while (defined(my $line = <$fh>)) {
1011 next if $line =~ m/^#/;
1012 next if $line =~ m/^\s*$/;
1014 my $linenr = $fh->input_line_number();
1015 my $prefix = "$filename (line $linenr)";
1017 if ($line =~ m/^\[(in|out)\]\s*$/i) {
1022 warn "$prefix: skip line - no section";
1027 eval { $rules = parse_fw_rule
($line, 1, 1); };
1029 warn "$prefix: $err";
1033 push @{$res->{$section}}, @$rules;
1039 sub parse_group_fw_rules
{
1040 my ($filename, $fh) = @_;
1045 my $res = { in => [], out
=> [] };
1047 while (defined(my $line = <$fh>)) {
1048 next if $line =~ m/^#/;
1049 next if $line =~ m/^\s*$/;
1051 my $linenr = $fh->input_line_number();
1052 my $prefix = "$filename (line $linenr)";
1054 if ($line =~ m/^\[(in|out):(\S+)\]\s*$/i) {
1059 if (!$section || !$group) {
1060 warn "$prefix: skip line - no section";
1065 eval { $rules = parse_fw_rule
($line, 0, 0); };
1067 warn "$prefix: $err";
1071 push @{$res->{$group}->{$section}}, @$rules;
1078 my ($code, @param) = @_;
1082 my $res = lock_file
($pve_fw_lock_filename, $timeout, $code, @param);
1089 sub read_local_vm_config
{
1095 my $list = PVE
::QemuServer
::config_list
();
1097 foreach my $vmid (keys %$list) {
1098 my $cfspath = PVE
::QemuServer
::cfs_config_path
($vmid);
1099 if (my $conf = PVE
::Cluster
::cfs_read_file
($cfspath)) {
1100 $qemu->{$vmid} = $conf;
1104 my $vmdata = { openvz
=> $openvz, qemu
=> $qemu };
1109 sub read_vm_firewall_rules
{
1112 foreach my $vmid (keys %{$vmdata->{qemu
}}, keys %{$vmdata->{openvz
}}) {
1113 my $filename = "/etc/pve/firewall/$vmid.fw";
1114 my $fh = IO
::File-
>new($filename, O_RDONLY
);
1117 $rules->{$vmid} = parse_vm_fw_rules
($filename, $fh);
1124 my $vmdata = read_local_vm_config
();
1125 my $rules = read_vm_firewall_rules
($vmdata);
1127 my $group_rules = {};
1128 my $filename = "/etc/pve/firewall/groups.fw";
1129 if (my $fh = IO
::File-
>new($filename, O_RDONLY
)) {
1130 $group_rules = parse_group_fw_rules
($filename, $fh);
1133 #print Dumper($rules);
1137 ruleset_create_chain
($ruleset, "PVEFW-INPUT");
1138 ruleset_create_chain
($ruleset, "PVEFW-OUTPUT");
1139 ruleset_create_chain
($ruleset, "PVEFW-FORWARD");
1141 ruleset_create_chain
($ruleset, "PVEFW-SET-ACCEPT-MARK");
1142 ruleset_addrule
($ruleset, "PVEFW-SET-ACCEPT-MARK", "-j MARK --set-mark 1");
1144 my $enable_hostfw = 0;
1145 $filename = "/etc/pve/local/host.fw";
1146 if (my $fh = IO
::File-
>new($filename, O_RDONLY
)) {
1147 my $host_rules = parse_host_fw_rules
($filename, $fh);
1151 enablehostfw
($ruleset, $host_rules, $group_rules);
1154 # generate firewall rules for QEMU VMs
1155 foreach my $vmid (keys %{$vmdata->{qemu
}}) {
1156 my $conf = $vmdata->{qemu
}->{$vmid};
1157 my $vmfw_conf = $rules->{$vmid};
1158 next if !$vmfw_conf;
1159 next if defined($vmfw_conf->{options
}->{enable
}) && ($vmfw_conf->{options
}->{enable
} == 0);
1161 foreach my $netid (keys %$conf) {
1162 next if $netid !~ m/^net(\d+)$/;
1163 my $net = PVE
::QemuServer
::parse_net
($conf->{$netid});
1165 my $iface = "tap${vmid}i$1";
1167 my $bridge = $net->{bridge
};
1168 next if !$bridge; # fixme: ?
1170 $bridge .= "v$net->{tag}" if $net->{tag
};
1173 generate_bridge_chains
($ruleset, $bridge);
1175 my $macaddr = $net->{macaddr
};
1176 generate_tap_rules_direction
($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'IN');
1177 generate_tap_rules_direction
($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'OUT');
1181 if ($enable_hostfw) {
1182 # allow traffic from lo (ourself)
1183 ruleset_addrule
($ruleset, "PVEFW-INPUT", "-i lo -j ACCEPT");
1189 sub get_ruleset_status
{
1190 my ($ruleset, $verbose) = @_;
1192 my $active_chains = iptables_get_chains
();
1194 my $statushash = {};
1196 foreach my $chain (sort keys %$ruleset) {
1197 my $digest = Digest
::SHA-
>new('sha1');
1198 foreach my $cmd (@{$ruleset->{$chain}}) {
1199 $digest->add("$cmd\n");
1201 my $sig = $digest->b64digest;
1202 $statushash->{$chain}->{sig
} = $sig;
1204 my $oldsig = $active_chains->{$chain};
1205 if (!defined($oldsig)) {
1206 $statushash->{$chain}->{action
} = 'create';
1208 if ($oldsig eq $sig) {
1209 $statushash->{$chain}->{action
} = 'exists';
1211 $statushash->{$chain}->{action
} = 'update';
1214 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
1215 foreach my $cmd (@{$ruleset->{$chain}}) {
1216 print "\t$cmd\n" if $verbose;
1220 foreach my $chain (sort keys %$active_chains) {
1221 if (!defined($ruleset->{$chain})) {
1222 my $sig = $active_chains->{$chain};
1223 $statushash->{$chain}->{action
} = 'delete';
1224 $statushash->{$chain}->{sig
} = $sig;
1225 print "delete $chain ($sig)\n" if $verbose;
1235 get_ruleset_status
($ruleset, 1);
1238 sub print_sig_rule
{
1239 my ($chain, $sig) = @_;
1241 # We just use this to store a SHA1 checksum used to detect changes
1242 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
1246 my ($ruleset, $verbose) = @_;
1248 enable_bridge_firewall();
1250 my $cmdlist = "*filter
\n"; # we pass this to iptables-restore;
1252 my $statushash = get_ruleset_status($ruleset, $verbose);
1254 # create missing chains first
1255 foreach my $chain (sort keys %$ruleset) {
1256 my $stat = $statushash->{$chain};
1257 die "internal error
" if !$stat;
1258 next if $stat->{action} ne 'create';
1260 $cmdlist .= ":$chain - [0:0]\n";
1263 my $rule = "INPUT
-j PVEFW-INPUT
";
1264 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1265 $cmdlist .= "-A
$rule\n";
1267 $rule = "OUTPUT
-j PVEFW-OUTPUT
";
1268 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1269 $cmdlist .= "-A
$rule\n";
1272 $rule = "FORWARD
-j PVEFW-FORWARD
";
1273 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1274 $cmdlist .= "-A
$rule\n";
1277 foreach my $chain (sort keys %$ruleset) {
1278 my $stat = $statushash->{$chain};
1279 die "internal error
" if !$stat;
1281 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
1282 $cmdlist .= "-F
$chain\n";
1283 foreach my $cmd (@{$ruleset->{$chain}}) {
1284 $cmdlist .= "$cmd\n";
1286 $cmdlist .= print_sig_rule($chain, $stat->{sig});
1287 } elsif ($stat->{action} eq 'delete') {
1288 die "internal error
"; # this should not happen
1289 } elsif ($stat->{action} eq 'exists') {
1292 die "internal error
- unknown status
'$stat->{action}'";
1296 foreach my $chain (keys %$statushash) {
1297 next if $statushash->{$chain}->{action} ne 'delete';
1298 $cmdlist .= "-F
$chain\n";
1300 foreach my $chain (keys %$statushash) {
1301 next if $statushash->{$chain}->{action} ne 'delete';
1302 next if $chain eq 'PVEFW-INPUT';
1303 next if $chain eq 'PVEFW-OUTPUT';
1304 next if $chain eq 'PVEFW-FORWARD';
1305 $cmdlist .= "-X
$chain\n";
1308 $cmdlist .= "COMMIT
\n";
1310 print $cmdlist if $verbose;
1312 iptables_restore_cmdlist($cmdlist);
1314 # test: re-read status and check if everything is up to date
1315 $statushash = get_ruleset_status($ruleset);
1318 foreach my $chain (sort keys %$ruleset) {
1319 my $stat = $statushash->{$chain};
1320 if ($stat->{action} ne 'exists') {
1321 warn "unable to update chain
'$chain'\n";
1326 die "unable to apply firewall changes
\n" if $errors;