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 # inspired by: /usr/share/shorewall/macro.*
22 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6889' },
23 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' }
26 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
29 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
33 my $pve_fw_parsed_macros;
34 my $pve_fw_preferred_macro_names = {};
36 sub get_firewall_macros
{
38 return $pve_fw_parsed_macros if $pve_fw_parsed_macros;
40 $pve_fw_parsed_macros = {};
42 foreach my $k (keys %$pve_fw_macros) {
45 my $macro = $pve_fw_macros->{$k};
46 $pve_fw_preferred_macro_names->{$name} = $k;
47 $pve_fw_parsed_macros->{$name} = $macro;
50 return $pve_fw_parsed_macros;
55 sub get_etc_services
{
57 return $etc_services if $etc_services;
59 my $filename = "/etc/services";
61 my $fh = IO
::File-
>new($filename, O_RDONLY
);
63 warn "unable to read '$filename' - $!\n";
69 while (my $line = <$fh>) {
71 next if $line =~m/^#/;
72 next if ($line =~m/^\s*$/);
74 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
75 $services->{byid
}->{$2}->{name
} = $1;
76 $services->{byid
}->{$2}->{$3} = 1;
77 $services->{byname
}->{$1} = $services->{byid
}->{$2};
83 $etc_services = $services;
91 sub get_etc_protocols
{
92 return $etc_protocols if $etc_protocols;
94 my $filename = "/etc/protocols";
96 my $fh = IO
::File-
>new($filename, O_RDONLY
);
98 warn "unable to read '$filename' - $!\n";
104 while (my $line = <$fh>) {
106 next if $line =~m/^#/;
107 next if ($line =~m/^\s*$/);
109 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
110 $protocols->{byid
}->{$2}->{name
} = $1;
111 $protocols->{byname
}->{$1} = $protocols->{byid
}->{$2};
117 $etc_protocols = $protocols;
119 return $etc_protocols;
122 sub parse_address_list
{
126 foreach my $aor (split(/,/, $str)) {
127 if (!Net
::IP-
>new($aor)) {
128 my $err = Net
::IP
::Error
();
129 die "invalid IP address: $err\n";
137 sub parse_port_name_number_or_range
{
140 my $services = PVE
::Firewall
::get_etc_services
();
142 foreach my $item (split(/,/, $str)) {
144 foreach my $pon (split(':', $item, 2)) {
145 if ($pon =~ m/^\d+$/){
146 die "invalid port '$pon'\n" if $pon < 0 && $pon > 65536;
148 die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname
}->{$pon};
157 my $bridge_firewall_enabled = 0;
159 sub enable_bridge_firewall
{
161 return if $bridge_firewall_enabled; # only once
163 system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables");
164 system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-ip6tables");
166 $bridge_firewall_enabled = 1;
169 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
174 run_command
("/sbin/iptables $cmd", outfunc
=> sub {}, errfunc
=> sub {});
177 sub iptables_restore_cmdlist
{
180 run_command
("/sbin/iptables-restore -n", input
=> $cmdlist);
183 sub iptables_get_chains
{
187 # check what chains we want to track
188 my $is_pvefw_chain = sub {
191 return 1 if $name =~ m/^PVEFW-\S+$/;
193 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
194 return 1 if $name =~ m/^vmbr\d+-(:?IN|OUT)$/;
195 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
205 return if $line =~ m/^#/;
206 return if $line =~ m/^\s*$/;
208 if ($line =~ m/^\*(\S+)$/) {
213 return if $table ne 'filter';
215 if ($line =~ m/^:(\S+)\s/) {
217 return if !&$is_pvefw_chain($chain);
218 $res->{$chain} = "unknown";
219 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
220 my ($chain, $sig) = ($1, $2);
221 return if !&$is_pvefw_chain($chain);
222 $res->{$chain} = $sig;
224 # simply ignore the rest
229 run_command
("/sbin/iptables-save", outfunc
=> $parser);
234 sub iptables_chain_exist
{
238 iptables
("-n --list $chain");
245 sub iptables_rule_exist
{
249 iptables
("-C $rule");
256 sub ruleset_generate_rule
{
257 my ($ruleset, $chain, $rule, $goto) = @_;
261 $cmd .= " -m iprange --src-range" if $rule->{nbsource
} && $rule->{nbsource
} > 1;
262 $cmd .= " -s $rule->{source}" if $rule->{source
};
263 $cmd .= " -m iprange --dst-range" if $rule->{nbdest
} && $rule->{nbdest
} > 1;
264 $cmd .= " -d $rule->{dest}" if $rule->{destination
};
265 $cmd .= " -p $rule->{proto}" if $rule->{proto
};
266 $cmd .= " --match multiport" if $rule->{nbdport
} && $rule->{nbdport
} > 1;
267 $cmd .= " --dport $rule->{dport}" if $rule->{dport
};
268 $cmd .= " --match multiport" if $rule->{nbsport
} && $rule->{nbsport
} > 1;
269 $cmd .= " --sport $rule->{sport}" if $rule->{sport
};
271 if (my $action = $rule->{action
}) {
272 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
273 $cmd .= $goto ?
" -g $action" : " -j $action";
276 ruleset_addrule
($ruleset, $chain, $cmd) if $cmd;
279 sub ruleset_create_chain
{
280 my ($ruleset, $chain) = @_;
282 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
284 die "chain '$chain' already exists\n" if $ruleset->{$chain};
286 $ruleset->{$chain} = [];
289 sub ruleset_chain_exist
{
290 my ($ruleset, $chain) = @_;
292 return $ruleset->{$chain} ?
1 : undef;
295 sub ruleset_addrule
{
296 my ($ruleset, $chain, $rule) = @_;
298 die "no such chain '$chain'\n" if !$ruleset->{$chain};
300 push @{$ruleset->{$chain}}, "-A $chain $rule";
303 sub ruleset_insertrule
{
304 my ($ruleset, $chain, $rule) = @_;
306 die "no such chain '$chain'\n" if !$ruleset->{$chain};
308 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
311 sub generate_bridge_chains
{
312 my ($ruleset, $bridge) = @_;
314 if (!ruleset_chain_exist
($ruleset, "PVEFW-BRIDGE-IN")){
315 ruleset_create_chain
($ruleset, "PVEFW-BRIDGE-IN");
318 if (!ruleset_chain_exist
($ruleset, "PVEFW-BRIDGE-OUT")){
319 ruleset_create_chain
($ruleset, "PVEFW-BRIDGE-OUT");
322 if (!ruleset_chain_exist
($ruleset, "PVEFW-FORWARD")){
323 ruleset_create_chain
($ruleset, "PVEFW-FORWARD");
325 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-m state --state RELATED,ESTABLISHED -j ACCEPT");
326 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-in --physdev-is-bridged -j PVEFW-BRIDGE-OUT");
327 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-out --physdev-is-bridged -j PVEFW-BRIDGE-IN");
330 if (!ruleset_chain_exist
($ruleset, "$bridge-IN")) {
331 ruleset_create_chain
($ruleset, "$bridge-IN");
332 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-i $bridge -j DROP"); # disable interbridge routing
333 ruleset_addrule
($ruleset, "PVEFW-BRIDGE-IN", "-j $bridge-IN");
334 ruleset_addrule
($ruleset, "$bridge-IN", "-j ACCEPT");
337 if (!ruleset_chain_exist
($ruleset, "$bridge-OUT")) {
338 ruleset_create_chain
($ruleset, "$bridge-OUT");
339 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-o $bridge -j DROP"); # disable interbridge routing
340 ruleset_addrule
($ruleset, "PVEFW-BRIDGE-OUT", "-j $bridge-OUT");
344 sub generate_tap_rules_direction
{
345 my ($ruleset, $group_rules, $iface, $netid, $macaddr, $rules, $bridge, $direction) = @_;
347 my $tapchain = "$iface-$direction";
349 ruleset_create_chain
($ruleset, $tapchain);
351 ruleset_addrule
($ruleset, $tapchain, "-m state --state INVALID -j DROP");
352 ruleset_addrule
($ruleset, $tapchain, "-m state --state RELATED,ESTABLISHED -j ACCEPT");
354 if ($direction eq 'OUT' && defined($macaddr)) {
355 ruleset_addrule
($ruleset, $tapchain, "-m mac ! --mac-source $macaddr -j DROP");
359 foreach my $rule (@$rules) {
360 next if $rule->{iface
} && $rule->{iface
} ne $netid;
361 # we go to $bridge-IN if accept in out rules
362 if($rule->{action
} =~ m/^(GROUP-(\S+))$/){
363 $rule->{action
} .= "-$direction";
364 # generate empty group rule if don't exist
365 if(!ruleset_chain_exist
($ruleset, $rule->{action
})){
366 generate_group_rules
($ruleset, $group_rules, $2);
368 ruleset_generate_rule
($ruleset, $tapchain, $rule);
369 ruleset_addrule
($ruleset, $tapchain, "-m mark --mark 1 -g $bridge-IN")
370 if $direction eq 'OUT';
372 $rule->{action
} = "$bridge-IN" if $rule->{action
} eq 'ACCEPT' && $direction eq 'OUT';
373 ruleset_generate_rule
($ruleset, $tapchain, $rule);
378 ruleset_addrule
($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-dropped: \" --log-level 4");
379 ruleset_addrule
($ruleset, $tapchain, "-j DROP");
381 # plug the tap chain to bridge chain
382 my $physdevdirection = $direction eq 'IN' ?
"out" : "in";
383 my $rule = "-m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain";
384 ruleset_insertrule
($ruleset, "$bridge-$direction", $rule);
386 if ($direction eq 'OUT'){
387 # add tap->host rules
388 my $rule = "-m physdev --physdev-$physdevdirection $iface -j $tapchain";
389 ruleset_addrule
($ruleset, "PVEFW-INPUT", $rule);
394 my ($ruleset, $rules, $group_rules) = @_;
396 # fixme: allow security groups
398 # host inbound firewall
399 my $chain = "PVEFW-HOST-IN";
400 ruleset_create_chain
($ruleset, $chain);
402 ruleset_addrule
($ruleset, $chain, "-m state --state INVALID -j DROP");
403 ruleset_addrule
($ruleset, $chain, "-m state --state RELATED,ESTABLISHED -j ACCEPT");
404 ruleset_addrule
($ruleset, $chain, "-i lo -j ACCEPT");
405 ruleset_addrule
($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
406 ruleset_addrule
($ruleset, $chain, "-p udp -m state --state NEW -m multiport --dports 5404,5405 -j ACCEPT");
407 ruleset_addrule
($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
410 foreach my $rule (@{$rules->{in}}) {
411 # we use RETURN because we need to check also tap rules
412 $rule->{action
} = 'RETURN' if $rule->{action
} eq 'ACCEPT';
413 ruleset_generate_rule
($ruleset, $chain, $rule);
417 ruleset_addrule
($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-IN dropped: \" --log-level 4");
418 ruleset_addrule
($ruleset, $chain, "-j DROP");
420 # host outbound firewall
421 $chain = "PVEFW-HOST-OUT";
422 ruleset_create_chain
($ruleset, $chain);
424 ruleset_addrule
($ruleset, $chain, "-m state --state INVALID -j DROP");
425 ruleset_addrule
($ruleset, $chain, "-m state --state RELATED,ESTABLISHED -j ACCEPT");
426 ruleset_addrule
($ruleset, $chain, "-o lo -j ACCEPT");
427 ruleset_addrule
($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
428 ruleset_addrule
($ruleset, $chain, "-p udp -m state --state NEW -m multiport --dports 5404,5405 -j ACCEPT");
429 ruleset_addrule
($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
432 foreach my $rule (@{$rules->{out
}}) {
433 # we use RETURN because we need to check also tap rules
434 $rule->{action
} = 'RETURN' if $rule->{action
} eq 'ACCEPT';
435 ruleset_generate_rule
($ruleset, $chain, $rule);
439 ruleset_addrule
($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-OUT dropped: \" --log-level 4");
440 ruleset_addrule
($ruleset, $chain, "-j DROP");
442 ruleset_addrule
($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
443 ruleset_addrule
($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
446 sub generate_group_rules
{
447 my ($ruleset, $group_rules, $group) = @_;
449 my $rules = $group_rules->{$group};
451 die "no such security group '$group'\n" if !$rules;
453 my $chain = "GROUP-${group}-IN";
455 ruleset_create_chain
($ruleset, $chain);
458 foreach my $rule (@{$rules->{in}}) {
459 ruleset_generate_rule
($ruleset, $chain, $rule);
463 $chain = "GROUP-${group}-OUT";
465 ruleset_create_chain
($ruleset, $chain);
466 ruleset_addrule
($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
469 foreach my $rule (@{$rules->{out
}}) {
470 # we go the PVEFW-SET-ACCEPT-MARK Instead of ACCEPT) because we need to
471 # check also other tap rules (and group rules can be set on any bridge,
472 # so we can't go to VMBRXX-IN)
473 $rule->{action
} = 'PVEFW-SET-ACCEPT-MARK' if $rule->{action
} eq 'ACCEPT';
474 ruleset_generate_rule
($ruleset, $chain, $rule);
480 my $valid_netdev_names = {};
481 for (my $i = 0; $i < $MAX_NETS; $i++) {
482 $valid_netdev_names->{"net$i"} = 1;
486 my ($line, $need_iface, $allow_groups) = @_;
488 my $macros = get_firewall_macros
();
489 my $protocols = get_etc_protocols
();
491 my ($action, $iface, $source, $dest, $proto, $dport, $sport);
495 my @data = split(/\s+/, $line);
496 my $expected_elements = $need_iface ?
7 : 6;
498 die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
501 ($action, $iface, $source, $dest, $proto, $dport, $sport) = @data
503 ($action, $source, $dest, $proto, $dport, $sport) = @data;
506 die "incomplete rule\n" if !$action;
511 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
513 } elsif ($allow_groups && $action =~ m/^GROUP-(:?\S+)$/) {
515 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
516 ($macro_name, $action) = ($1, $2);
517 my $lc_macro_name = lc($macro_name);
518 my $preferred_name = $pve_fw_preferred_macro_names->{$lc_macro_name};
519 $macro_name = $preferred_name if $preferred_name;
520 $macro = $macros->{$lc_macro_name};
521 die "unknown macro '$macro_name'\n" if !$macro;
523 die "unknown action '$action'\n";
527 $iface = undef if $iface && $iface eq '-';
528 die "unknown interface '$iface'\n"
529 if defined($iface) && !$valid_netdev_names->{$iface};
532 $proto = undef if $proto && $proto eq '-';
533 die "unknown protokol '$proto'\n" if $proto &&
534 !(defined($protocols->{byname
}->{$proto}) ||
535 defined($protocols->{byid
}->{$proto}));
537 $source = undef if $source && $source eq '-';
538 $dest = undef if $dest && $dest eq '-';
540 $dport = undef if $dport && $dport eq '-';
541 $sport = undef if $sport && $sport eq '-';
543 my $nbsource = undef;
546 $nbsource = parse_address_list
($source) if $source;
547 $nbdest = parse_address_list
($dest) if $dest;
556 nbsource
=> $nbsource,
564 foreach my $templ (@$macro) {
566 foreach my $k (keys %$templ) {
567 my $v = $templ->{$k};
568 $v = $param->{$k} if $v eq 'PARAM';
569 die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
575 push @$rules, $param;
578 foreach my $rule (@$rules) {
579 $rule->{nbdport
} = parse_port_name_number_or_range
($rule->{dport
})
580 if defined($rule->{dport
});
581 $rule->{nbsport
} = parse_port_name_number_or_range
($rule->{sport
})
582 if defined($rule->{sport
});
588 sub parse_vm_fw_rules
{
589 my ($filename, $fh) = @_;
591 my $res = { in => [], out
=> [] };
595 while (defined(my $line = <$fh>)) {
596 next if $line =~ m/^#/;
597 next if $line =~ m/^\s*$/;
599 my $linenr = $fh->input_line_number();
600 my $prefix = "$filename (line $linenr)";
602 if ($line =~ m/^\[(in|out)\]\s*$/i) {
607 warn "$prefix: skip line - no section";
612 eval { $rules = parse_fw_rule
($line, 1, 1); };
614 warn "$prefix: $err";
618 push @{$res->{$section}}, @$rules;
624 sub parse_host_fw_rules
{
625 my ($filename, $fh) = @_;
627 my $res = { in => [], out
=> [] };
631 while (defined(my $line = <$fh>)) {
632 next if $line =~ m/^#/;
633 next if $line =~ m/^\s*$/;
635 my $linenr = $fh->input_line_number();
636 my $prefix = "$filename (line $linenr)";
638 if ($line =~ m/^\[(in|out)\]\s*$/i) {
643 warn "$prefix: skip line - no section";
648 eval { $rules = parse_fw_rule
($line, 1, 1); };
650 warn "$prefix: $err";
654 push @{$res->{$section}}, @$rules;
660 sub parse_group_fw_rules
{
661 my ($filename, $fh) = @_;
666 my $res = { in => [], out
=> [] };
668 while (defined(my $line = <$fh>)) {
669 next if $line =~ m/^#/;
670 next if $line =~ m/^\s*$/;
672 my $linenr = $fh->input_line_number();
673 my $prefix = "$filename (line $linenr)";
675 if ($line =~ m/^\[(in|out):(\S+)\]\s*$/i) {
680 if (!$section || !$group) {
681 warn "$prefix: skip line - no section";
686 eval { $rules = parse_fw_rule
($line, 0, 0); };
688 warn "$prefix: $err";
692 push @{$res->{$group}->{$section}}, @$rules;
699 my ($code, @param) = @_;
703 my $res = lock_file
($pve_fw_lock_filename, $timeout, $code, @param);
710 sub read_local_vm_config
{
716 my $list = PVE
::QemuServer
::config_list
();
718 foreach my $vmid (keys %$list) {
719 my $cfspath = PVE
::QemuServer
::cfs_config_path
($vmid);
720 if (my $conf = PVE
::Cluster
::cfs_read_file
($cfspath)) {
721 $qemu->{$vmid} = $conf;
725 my $vmdata = { openvz
=> $openvz, qemu
=> $qemu };
730 sub read_vm_firewall_rules
{
733 foreach my $vmid (keys %{$vmdata->{qemu
}}, keys %{$vmdata->{openvz
}}) {
734 my $filename = "/etc/pve/firewall/$vmid.fw";
735 my $fh = IO
::File-
>new($filename, O_RDONLY
);
738 $rules->{$vmid} = parse_vm_fw_rules
($filename, $fh);
745 my $vmdata = read_local_vm_config
();
746 my $rules = read_vm_firewall_rules
($vmdata);
748 my $group_rules = {};
749 my $filename = "/etc/pve/firewall/groups.fw";
750 if (my $fh = IO
::File-
>new($filename, O_RDONLY
)) {
751 $group_rules = parse_group_fw_rules
($filename, $fh);
754 #print Dumper($rules);
758 # setup host firewall rules
759 ruleset_create_chain
($ruleset, "PVEFW-INPUT");
760 ruleset_create_chain
($ruleset, "PVEFW-OUTPUT");
762 ruleset_create_chain
($ruleset, "PVEFW-SET-ACCEPT-MARK");
763 ruleset_addrule
($ruleset, "PVEFW-SET-ACCEPT-MARK", "-j MARK --set-mark 1");
765 $filename = "/etc/pve/local/host.fw";
766 if (my $fh = IO
::File-
>new($filename, O_RDONLY
)) {
767 my $host_rules = parse_host_fw_rules
($filename, $fh);
768 enablehostfw
($ruleset, $host_rules, $group_rules);
771 # generate firewall rules for QEMU VMs
772 foreach my $vmid (keys %{$vmdata->{qemu
}}) {
773 my $conf = $vmdata->{qemu
}->{$vmid};
774 next if !$rules->{$vmid};
776 foreach my $netid (keys %$conf) {
777 next if $netid !~ m/^net(\d+)$/;
778 my $net = PVE
::QemuServer
::parse_net
($conf->{$netid});
780 my $iface = "tap${vmid}i$1";
782 my $bridge = $net->{bridge
};
783 next if !$bridge; # fixme: ?
785 $bridge .= "v$net->{tag}" if $net->{tag
};
787 generate_bridge_chains
($ruleset, $bridge);
789 my $macaddr = $net->{macaddr
};
790 generate_tap_rules_direction
($ruleset, $group_rules, $iface, $netid, $macaddr, $rules->{$vmid}->{in}, $bridge, 'IN');
791 generate_tap_rules_direction
($ruleset, $group_rules, $iface, $netid, $macaddr, $rules->{$vmid}->{out
}, $bridge, 'OUT');
797 sub get_ruleset_status
{
798 my ($ruleset, $verbose) = @_;
800 my $active_chains = iptables_get_chains
();
804 foreach my $chain (sort keys %$ruleset) {
805 my $digest = Digest
::SHA-
>new('sha1');
806 foreach my $cmd (@{$ruleset->{$chain}}) {
807 $digest->add("$cmd\n");
809 my $sig = $digest->b64digest;
810 $statushash->{$chain}->{sig
} = $sig;
812 my $oldsig = $active_chains->{$chain};
813 if (!defined($oldsig)) {
814 $statushash->{$chain}->{action
} = 'create';
816 if ($oldsig eq $sig) {
817 $statushash->{$chain}->{action
} = 'exists';
819 $statushash->{$chain}->{action
} = 'update';
822 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
823 foreach my $cmd (@{$ruleset->{$chain}}) {
824 print "\t$cmd\n" if $verbose;
828 foreach my $chain (sort keys %$active_chains) {
829 if (!defined($ruleset->{$chain})) {
830 my $sig = $active_chains->{$chain};
831 $statushash->{$chain}->{action
} = 'delete';
832 $statushash->{$chain}->{sig
} = $sig;
833 print "delete $chain ($sig)\n" if $verbose;
843 get_ruleset_status
($ruleset, 1);
847 my ($chain, $sig) = @_;
849 # We just use this to store a SHA1 checksum used to detect changes
850 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
854 my ($ruleset, $verbose) = @_;
856 enable_bridge_firewall();
858 my $cmdlist = "*filter
\n"; # we pass this to iptables-restore;
860 my $statushash = get_ruleset_status($ruleset, $verbose);
862 # create missing chains first
863 foreach my $chain (sort keys %$ruleset) {
864 my $stat = $statushash->{$chain};
865 die "internal error
" if !$stat;
866 next if $stat->{action} ne 'create';
868 $cmdlist .= ":$chain - [0:0]\n";
871 my $rule = "INPUT
-j PVEFW-INPUT
";
872 if (!PVE::Firewall::iptables_rule_exist($rule)) {
873 $cmdlist .= "-A
$rule\n";
875 $rule = "OUTPUT
-j PVEFW-OUTPUT
";
876 if (!PVE::Firewall::iptables_rule_exist($rule)) {
877 $cmdlist .= "-A
$rule\n";
880 $rule = "FORWARD
-j PVEFW-FORWARD
";
881 if (!PVE::Firewall::iptables_rule_exist($rule)) {
882 $cmdlist .= "-A
$rule\n";
885 foreach my $chain (sort keys %$ruleset) {
886 my $stat = $statushash->{$chain};
887 die "internal error
" if !$stat;
889 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
890 $cmdlist .= "-F
$chain\n";
891 foreach my $cmd (@{$ruleset->{$chain}}) {
892 $cmdlist .= "$cmd\n";
894 $cmdlist .= print_sig_rule($chain, $stat->{sig});
895 } elsif ($stat->{action} eq 'delete') {
896 die "internal error
"; # this should not happen
897 } elsif ($stat->{action} eq 'exists') {
900 die "internal error
- unknown status
'$stat->{action}'";
904 foreach my $chain (keys %$statushash) {
905 next if $statushash->{$chain}->{action} ne 'delete';
906 $cmdlist .= "-F
$chain\n";
908 foreach my $chain (keys %$statushash) {
909 next if $statushash->{$chain}->{action} ne 'delete';
910 $cmdlist .= "-X
$chain\n";
913 $cmdlist .= "COMMIT
\n";
915 print $cmdlist if $verbose;
917 iptables_restore_cmdlist($cmdlist);
919 # test: re-read status and check if everything is up to date
920 $statushash = get_ruleset_status($ruleset);
923 foreach my $chain (sort keys %$ruleset) {
924 my $stat = $statushash->{$chain};
925 if ($stat->{action} ne 'exists') {
926 warn "unable to update chain
'$chain'\n";
931 die "unable to apply firewall changes
\n" if $errors;