parse_port_name_number_or_range fix range check
[pve-firewall.git] / PVE / Firewall.pm
1 package PVE::Firewall;
2
3 use warnings;
4 use strict;
5 use Data::Dumper;
6 use Digest::SHA;
7 use PVE::Tools;
8 use PVE::QemuServer;
9 use File::Path;
10 use IO::File;
11 use Net::IP;
12 use PVE::Tools qw(run_command lock_file);
13
14 use Data::Dumper;
15
16 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
17
18 # todo: define more MACROS
19 # imported/converted from: /usr/share/shorewall/macro.*
20 my $pve_fw_macros = {
21 'Amanda' => [
22 { action => 'PARAM', proto => 'udp', dport => '10080' },
23 { action => 'PARAM', proto => 'tcp', dport => '10080' },
24 ],
25 'Auth' => [
26 { action => 'PARAM', proto => 'tcp', dport => '113' },
27 ],
28 'BGP' => [
29 { action => 'PARAM', proto => 'tcp', dport => '179' },
30 ],
31 'BitTorrent' => [
32 { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
33 { action => 'PARAM', proto => 'udp', dport => '6881' },
34 ],
35 'BitTorrent32' => [
36 { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
37 { action => 'PARAM', proto => 'udp', dport => '6881' },
38 ],
39 'CVS' => [
40 { action => 'PARAM', proto => 'tcp', dport => '2401' },
41 ],
42 'Citrix' => [
43 { action => 'PARAM', proto => 'tcp', dport => '1494' },
44 { action => 'PARAM', proto => 'udp', dport => '1604' },
45 { action => 'PARAM', proto => 'tcp', dport => '2598' },
46 ],
47 'DAAP' => [
48 { action => 'PARAM', proto => 'tcp', dport => '3689' },
49 { action => 'PARAM', proto => 'udp', dport => '3689' },
50 ],
51 'DCC' => [
52 { action => 'PARAM', proto => 'tcp', dport => '6277' },
53 ],
54 'DHCPfwd' => [
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' },
57 ],
58 'DNS' => [
59 { action => 'PARAM', proto => 'udp', dport => '53' },
60 { action => 'PARAM', proto => 'tcp', dport => '53' },
61 ],
62 'Distcc' => [
63 { action => 'PARAM', proto => 'tcp', dport => '3632' },
64 ],
65 'Edonkey' => [
66 { action => 'PARAM', proto => 'tcp', dport => '4662' },
67 { action => 'PARAM', proto => 'udp', dport => '4665' },
68 ],
69 'FTP' => [
70 { action => 'PARAM', proto => 'tcp', dport => '21' },
71 ],
72 'Finger' => [
73 { action => 'PARAM', proto => 'tcp', dport => '79' },
74 ],
75 'GNUnet' => [
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' },
80 ],
81 'GRE' => [
82 { action => 'PARAM', proto => '47' },
83 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
84 ],
85 'Git' => [
86 { action => 'PARAM', proto => 'tcp', dport => '9418' },
87 ],
88 'Gnutella' => [
89 { action => 'PARAM', proto => 'tcp', dport => '6346' },
90 { action => 'PARAM', proto => 'udp', dport => '6346' },
91 ],
92 'HKP' => [
93 { action => 'PARAM', proto => 'tcp', dport => '11371' },
94 ],
95 'HTTP' => [
96 { action => 'PARAM', proto => 'tcp', dport => '80' },
97 ],
98 'HTTPS' => [
99 { action => 'PARAM', proto => 'tcp', dport => '443' },
100 ],
101 'ICPV2' => [
102 { action => 'PARAM', proto => 'udp', dport => '3130' },
103 ],
104 'ICQ' => [
105 { action => 'PARAM', proto => 'tcp', dport => '5190' },
106 ],
107 'IMAP' => [
108 { action => 'PARAM', proto => 'tcp', dport => '143' },
109 ],
110 'IMAPS' => [
111 { action => 'PARAM', proto => 'tcp', dport => '993' },
112 ],
113 'IPIP' => [
114 { action => 'PARAM', proto => '94' },
115 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' },
116 ],
117 'IPP' => [
118 { action => 'PARAM', proto => 'tcp', dport => '631' },
119 ],
120 'IPPbrd' => [
121 { action => 'PARAM', proto => 'udp', dport => '631' },
122 ],
123 'IPPserver' => [
124 { action => 'PARAM', source => 'SOURCE', dest => 'DEST', proto => 'tcp', dport => '631' },
125 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '631' },
126 ],
127 'IPsec' => [
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' },
132 ],
133 'IPsecah' => [
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' },
138 ],
139 'IPsecnat' => [
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' },
146 ],
147 'IRC' => [
148 { action => 'PARAM', proto => 'tcp', dport => '6667' },
149 ],
150 'JabberPlain' => [
151 { action => 'PARAM', proto => 'tcp', dport => '5222' },
152 ],
153 'JabberSecure' => [
154 { action => 'PARAM', proto => 'tcp', dport => '5223' },
155 ],
156 'Jabberd' => [
157 { action => 'PARAM', proto => 'tcp', dport => '5269' },
158 ],
159 'Jetdirect' => [
160 { action => 'PARAM', proto => 'tcp', dport => '9100' },
161 ],
162 'L2TP' => [
163 { action => 'PARAM', proto => 'udp', dport => '1701' },
164 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' },
165 ],
166 'LDAP' => [
167 { action => 'PARAM', proto => 'tcp', dport => '389' },
168 ],
169 'LDAPS' => [
170 { action => 'PARAM', proto => 'tcp', dport => '636' },
171 ],
172 'MSNP' => [
173 { action => 'PARAM', proto => 'tcp', dport => '1863' },
174 ],
175 'MSSQL' => [
176 { action => 'PARAM', proto => 'tcp', dport => '1433' },
177 ],
178 'Mail' => [
179 { action => 'PARAM', proto => 'tcp', dport => '25' },
180 { action => 'PARAM', proto => 'tcp', dport => '465' },
181 { action => 'PARAM', proto => 'tcp', dport => '587' },
182 ],
183 'Munin' => [
184 { action => 'PARAM', proto => 'tcp', dport => '4949' },
185 ],
186 'MySQL' => [
187 { action => 'PARAM', proto => 'tcp', dport => '3306' },
188 ],
189 'NNTP' => [
190 { action => 'PARAM', proto => 'tcp', dport => '119' },
191 ],
192 'NNTPS' => [
193 { action => 'PARAM', proto => 'tcp', dport => '563' },
194 ],
195 'NTP' => [
196 { action => 'PARAM', proto => 'udp', dport => '123' },
197 ],
198 'NTPbi' => [
199 { action => 'PARAM', proto => 'udp', dport => '123' },
200 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' },
201 ],
202 'NTPbrd' => [
203 { action => 'PARAM', proto => 'udp', dport => '123' },
204 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '123' },
205 ],
206 'OSPF' => [
207 { action => 'PARAM', proto => '89' },
208 ],
209 'OpenVPN' => [
210 { action => 'PARAM', proto => 'udp', dport => '1194' },
211 ],
212 'PCA' => [
213 { action => 'PARAM', proto => 'udp', dport => '5632' },
214 { action => 'PARAM', proto => 'tcp', dport => '5631' },
215 ],
216 'POP3' => [
217 { action => 'PARAM', proto => 'tcp', dport => '110' },
218 ],
219 'POP3S' => [
220 { action => 'PARAM', proto => 'tcp', dport => '995' },
221 ],
222 'PPtP' => [
223 { action => 'PARAM', proto => '47' },
224 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
225 { action => 'PARAM', proto => 'tcp', dport => '1723' },
226 ],
227 'Ping' => [
228 { action => 'PARAM', proto => 'icmp', dport => '8' },
229 ],
230 'PostgreSQL' => [
231 { action => 'PARAM', proto => 'tcp', dport => '5432' },
232 ],
233 'Printer' => [
234 { action => 'PARAM', proto => 'tcp', dport => '515' },
235 ],
236 'RDP' => [
237 { action => 'PARAM', proto => 'tcp', dport => '3389' },
238 ],
239 'RIPbi' => [
240 { action => 'PARAM', proto => 'udp', dport => '520' },
241 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' },
242 ],
243 'RNDC' => [
244 { action => 'PARAM', proto => 'tcp', dport => '953' },
245 ],
246 'Razor' => [
247 { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
248 ],
249 'Rdate' => [
250 { action => 'PARAM', proto => 'tcp', dport => '37' },
251 ],
252 'Rsync' => [
253 { action => 'PARAM', proto => 'tcp', dport => '873' },
254 ],
255 'SANE' => [
256 { action => 'PARAM', proto => 'tcp', dport => '6566' },
257 ],
258 'SMB' => [
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' },
263 ],
264 'SMBBI' => [
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' },
273 ],
274 'SMBswat' => [
275 { action => 'PARAM', proto => 'tcp', dport => '901' },
276 ],
277 'SMTP' => [
278 { action => 'PARAM', proto => 'tcp', dport => '25' },
279 ],
280 'SMTPS' => [
281 { action => 'PARAM', proto => 'tcp', dport => '465' },
282 ],
283 'SNMP' => [
284 { action => 'PARAM', proto => 'udp', dport => '161:162' },
285 { action => 'PARAM', proto => 'tcp', dport => '161' },
286 ],
287 'SPAMD' => [
288 { action => 'PARAM', proto => 'tcp', dport => '783' },
289 ],
290 'SSH' => [
291 { action => 'PARAM', proto => 'tcp', dport => '22' },
292 ],
293 'SVN' => [
294 { action => 'PARAM', proto => 'tcp', dport => '3690' },
295 ],
296 'SixXS' => [
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' },
301 ],
302 'Squid' => [
303 { action => 'PARAM', proto => 'tcp', dport => '3128' },
304 ],
305 'Submission' => [
306 { action => 'PARAM', proto => 'tcp', dport => '587' },
307 ],
308 'Syslog' => [
309 { action => 'PARAM', proto => 'udp', dport => '514' },
310 { action => 'PARAM', proto => 'tcp', dport => '514' },
311 ],
312 'TFTP' => [
313 { action => 'PARAM', proto => 'udp', dport => '69' },
314 ],
315 'Telnet' => [
316 { action => 'PARAM', proto => 'tcp', dport => '23' },
317 ],
318 'Telnets' => [
319 { action => 'PARAM', proto => 'tcp', dport => '992' },
320 ],
321 'Time' => [
322 { action => 'PARAM', proto => 'tcp', dport => '37' },
323 ],
324 'Trcrt' => [
325 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
326 { action => 'PARAM', proto => 'icmp', dport => '8' },
327 ],
328 'VNC' => [
329 { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
330 ],
331 'VNCL' => [
332 { action => 'PARAM', proto => 'tcp', dport => '5500' },
333 ],
334 'Web' => [
335 { action => 'PARAM', proto => 'tcp', dport => '80' },
336 { action => 'PARAM', proto => 'tcp', dport => '443' },
337 ],
338 'Webcache' => [
339 { action => 'PARAM', proto => 'tcp', dport => '8080' },
340 ],
341 'Webmin' => [
342 { action => 'PARAM', proto => 'tcp', dport => '10000' },
343 ],
344 'Whois' => [
345 { action => 'PARAM', proto => 'tcp', dport => '43' },
346 ],
347 };
348
349 my $pve_fw_parsed_macros;
350 my $pve_fw_preferred_macro_names = {};
351
352 sub get_firewall_macros {
353
354 return $pve_fw_parsed_macros if $pve_fw_parsed_macros;
355
356 $pve_fw_parsed_macros = {};
357
358 foreach my $k (keys %$pve_fw_macros) {
359 my $name = lc($k);
360
361 my $macro = $pve_fw_macros->{$k};
362 $pve_fw_preferred_macro_names->{$name} = $k;
363 $pve_fw_parsed_macros->{$name} = $macro;
364 }
365
366 return $pve_fw_parsed_macros;
367 }
368
369 my $etc_services;
370
371 sub get_etc_services {
372
373 return $etc_services if $etc_services;
374
375 my $filename = "/etc/services";
376
377 my $fh = IO::File->new($filename, O_RDONLY);
378 if (!$fh) {
379 warn "unable to read '$filename' - $!\n";
380 return {};
381 }
382
383 my $services = {};
384
385 while (my $line = <$fh>) {
386 chomp ($line);
387 next if $line =~m/^#/;
388 next if ($line =~m/^\s*$/);
389
390 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
391 $services->{byid}->{$2}->{name} = $1;
392 $services->{byid}->{$2}->{port} = $2;
393 $services->{byid}->{$2}->{$3} = 1;
394 $services->{byname}->{$1} = $services->{byid}->{$2};
395 }
396 }
397
398 close($fh);
399
400 $etc_services = $services;
401
402
403 return $etc_services;
404 }
405
406 my $etc_protocols;
407
408 sub get_etc_protocols {
409 return $etc_protocols if $etc_protocols;
410
411 my $filename = "/etc/protocols";
412
413 my $fh = IO::File->new($filename, O_RDONLY);
414 if (!$fh) {
415 warn "unable to read '$filename' - $!\n";
416 return {};
417 }
418
419 my $protocols = {};
420
421 while (my $line = <$fh>) {
422 chomp ($line);
423 next if $line =~m/^#/;
424 next if ($line =~m/^\s*$/);
425
426 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
427 $protocols->{byid}->{$2}->{name} = $1;
428 $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
429 }
430 }
431
432 close($fh);
433
434 $etc_protocols = $protocols;
435
436 return $etc_protocols;
437 }
438
439 sub parse_address_list {
440 my ($str) = @_;
441
442 my $nbaor = 0;
443 foreach my $aor (split(/,/, $str)) {
444 if (!Net::IP->new($aor)) {
445 my $err = Net::IP::Error();
446 die "invalid IP address: $err\n";
447 }else{
448 $nbaor++;
449 }
450 }
451 return $nbaor;
452 }
453
454 sub parse_port_name_number_or_range {
455 my ($str) = @_;
456
457 my $services = PVE::Firewall::get_etc_services();
458 my $nbports = 0;
459 foreach my $item (split(/,/, $str)) {
460 my $portlist = "";
461 my $oldpon = undef;
462 foreach my $pon (split(':', $item, 2)) {
463 $pon = $services->{byname}->{$pon}->{port} if $services->{byname}->{$pon}->{port};
464 if ($pon =~ m/^\d+$/){
465 die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535;
466 die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon);
467 $oldpon = $pon;
468 }else{
469 die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon};
470 }
471 $nbports++;
472 }
473 }
474
475 return ($nbports);
476 }
477
478 my $bridge_firewall_enabled = 0;
479
480 sub enable_bridge_firewall {
481
482 return if $bridge_firewall_enabled; # only once
483
484 system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables");
485 system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-ip6tables");
486
487 $bridge_firewall_enabled = 1;
488 }
489
490 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
491
492 sub iptables {
493 my ($cmd) = @_;
494
495 run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {});
496 }
497
498 sub iptables_restore_cmdlist {
499 my ($cmdlist) = @_;
500
501 run_command("/sbin/iptables-restore -n", input => $cmdlist);
502 }
503
504 sub iptables_get_chains {
505
506 my $res = {};
507
508 # check what chains we want to track
509 my $is_pvefw_chain = sub {
510 my $name = shift;
511
512 return 1 if $name =~ m/^PVEFW-\S+$/;
513
514 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
515 return 1 if $name =~ m/^vmbr\d+-(:?IN|OUT)$/;
516 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
517
518 return undef;
519 };
520
521 my $table = '';
522
523 my $parser = sub {
524 my $line = shift;
525
526 return if $line =~ m/^#/;
527 return if $line =~ m/^\s*$/;
528
529 if ($line =~ m/^\*(\S+)$/) {
530 $table = $1;
531 return;
532 }
533
534 return if $table ne 'filter';
535
536 if ($line =~ m/^:(\S+)\s/) {
537 my $chain = $1;
538 return if !&$is_pvefw_chain($chain);
539 $res->{$chain} = "unknown";
540 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
541 my ($chain, $sig) = ($1, $2);
542 return if !&$is_pvefw_chain($chain);
543 $res->{$chain} = $sig;
544 } else {
545 # simply ignore the rest
546 return;
547 }
548 };
549
550 run_command("/sbin/iptables-save", outfunc => $parser);
551
552 return $res;
553 }
554
555 sub iptables_chain_exist {
556 my ($chain) = @_;
557
558 eval{
559 iptables("-n --list $chain");
560 };
561 return undef if $@;
562
563 return 1;
564 }
565
566 sub iptables_rule_exist {
567 my ($rule) = @_;
568
569 eval{
570 iptables("-C $rule");
571 };
572 return undef if $@;
573
574 return 1;
575 }
576
577 sub ruleset_generate_rule {
578 my ($ruleset, $chain, $rule, $goto) = @_;
579
580 my $cmd = '';
581
582 $cmd .= " -m iprange --src-range" if $rule->{nbsource} && $rule->{nbsource} > 1;
583 $cmd .= " -s $rule->{source}" if $rule->{source};
584 $cmd .= " -m iprange --dst-range" if $rule->{nbdest} && $rule->{nbdest} > 1;
585 $cmd .= " -d $rule->{dest}" if $rule->{dest};
586 $cmd .= " -p $rule->{proto}" if $rule->{proto};
587 $cmd .= " --match multiport" if $rule->{nbdport} && $rule->{nbdport} > 1;
588 $cmd .= " --dport $rule->{dport}" if $rule->{dport};
589 $cmd .= " --match multiport" if $rule->{nbsport} && $rule->{nbsport} > 1;
590 $cmd .= " --sport $rule->{sport}" if $rule->{sport};
591
592 if (my $action = $rule->{action}) {
593 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
594 $cmd .= $goto ? " -g $action" : " -j $action";
595 };
596
597 ruleset_addrule($ruleset, $chain, $cmd) if $cmd;
598 }
599
600 sub ruleset_create_chain {
601 my ($ruleset, $chain) = @_;
602
603 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
604
605 die "chain '$chain' already exists\n" if $ruleset->{$chain};
606
607 $ruleset->{$chain} = [];
608 }
609
610 sub ruleset_chain_exist {
611 my ($ruleset, $chain) = @_;
612
613 return $ruleset->{$chain} ? 1 : undef;
614 }
615
616 sub ruleset_addrule {
617 my ($ruleset, $chain, $rule) = @_;
618
619 die "no such chain '$chain'\n" if !$ruleset->{$chain};
620
621 push @{$ruleset->{$chain}}, "-A $chain $rule";
622 }
623
624 sub ruleset_insertrule {
625 my ($ruleset, $chain, $rule) = @_;
626
627 die "no such chain '$chain'\n" if !$ruleset->{$chain};
628
629 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
630 }
631
632 sub generate_bridge_chains {
633 my ($ruleset, $bridge) = @_;
634
635 if (!ruleset_chain_exist($ruleset, "PVEFW-BRIDGE-IN")){
636 ruleset_create_chain($ruleset, "PVEFW-BRIDGE-IN");
637 }
638
639 if (!ruleset_chain_exist($ruleset, "PVEFW-BRIDGE-OUT")){
640 ruleset_create_chain($ruleset, "PVEFW-BRIDGE-OUT");
641 }
642
643 if (!ruleset_chain_exist($ruleset, "PVEFW-FORWARD")){
644 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
645
646 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
647 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-in --physdev-is-bridged -j PVEFW-BRIDGE-OUT");
648 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-out --physdev-is-bridged -j PVEFW-BRIDGE-IN");
649 }
650
651 if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
652 ruleset_create_chain($ruleset, "$bridge-IN");
653 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j DROP"); # disable interbridge routing
654 ruleset_addrule($ruleset, "PVEFW-BRIDGE-IN", "-j $bridge-IN");
655 ruleset_addrule($ruleset, "$bridge-IN", "-j ACCEPT");
656 }
657
658 if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
659 ruleset_create_chain($ruleset, "$bridge-OUT");
660 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j DROP"); # disable interbridge routing
661 ruleset_addrule($ruleset, "PVEFW-BRIDGE-OUT", "-j $bridge-OUT");
662 }
663 }
664
665 sub generate_tap_rules_direction {
666 my ($ruleset, $group_rules, $iface, $netid, $macaddr, $rules, $bridge, $direction) = @_;
667
668 my $tapchain = "$iface-$direction";
669
670 ruleset_create_chain($ruleset, $tapchain);
671
672 ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate INVALID -j DROP");
673 ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
674
675 if ($direction eq 'OUT' && defined($macaddr)) {
676 ruleset_addrule($ruleset, $tapchain, "-m mac ! --mac-source $macaddr -j DROP");
677 }
678
679 if ($rules) {
680 foreach my $rule (@$rules) {
681 next if $rule->{iface} && $rule->{iface} ne $netid;
682 # we go to $bridge-IN if accept in out rules
683 if($rule->{action} =~ m/^(GROUP-(\S+))$/){
684 $rule->{action} .= "-$direction";
685 # generate empty group rule if don't exist
686 if(!ruleset_chain_exist($ruleset, $rule->{action})){
687 generate_group_rules($ruleset, $group_rules, $2);
688 }
689 ruleset_generate_rule($ruleset, $tapchain, $rule);
690 ruleset_addrule($ruleset, $tapchain, "-m mark --mark 1 -g $bridge-IN")
691 if $direction eq 'OUT';
692 } else {
693 $rule->{action} = "$bridge-IN" if $rule->{action} eq 'ACCEPT' && $direction eq 'OUT';
694 ruleset_generate_rule($ruleset, $tapchain, $rule);
695 }
696 }
697 }
698
699 ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-dropped: \" --log-level 4");
700 ruleset_addrule($ruleset, $tapchain, "-j DROP");
701
702 # plug the tap chain to bridge chain
703 my $physdevdirection = $direction eq 'IN' ? "out" : "in";
704 my $rule = "-m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain";
705 ruleset_insertrule($ruleset, "$bridge-$direction", $rule);
706
707 if ($direction eq 'OUT'){
708 # add tap->host rules
709 my $rule = "-m physdev --physdev-$physdevdirection $iface -j $tapchain";
710 ruleset_addrule($ruleset, "PVEFW-INPUT", $rule);
711 }
712 }
713
714 sub enablehostfw {
715 my ($ruleset, $rules, $group_rules) = @_;
716
717 # fixme: allow security groups
718
719 # host inbound firewall
720 my $chain = "PVEFW-HOST-IN";
721 ruleset_create_chain($ruleset, $chain);
722
723 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
724 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
725 ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
726 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
727 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
728 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
729
730 if ($rules->{in}) {
731 foreach my $rule (@{$rules->{in}}) {
732 # we use RETURN because we need to check also tap rules
733 $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT';
734 ruleset_generate_rule($ruleset, $chain, $rule);
735 }
736 }
737
738 ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-IN dropped: \" --log-level 4");
739 ruleset_addrule($ruleset, $chain, "-j DROP");
740
741 # host outbound firewall
742 $chain = "PVEFW-HOST-OUT";
743 ruleset_create_chain($ruleset, $chain);
744
745 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
746 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
747 ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
748 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
749 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
750 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
751
752 if ($rules->{out}) {
753 foreach my $rule (@{$rules->{out}}) {
754 # we use RETURN because we need to check also tap rules
755 $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT';
756 ruleset_generate_rule($ruleset, $chain, $rule);
757 }
758 }
759
760 ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-OUT dropped: \" --log-level 4");
761 ruleset_addrule($ruleset, $chain, "-j DROP");
762
763 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
764 ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
765 }
766
767 sub generate_group_rules {
768 my ($ruleset, $group_rules, $group) = @_;
769
770 my $rules = $group_rules->{$group};
771
772 die "no such security group '$group'\n" if !$rules;
773
774 my $chain = "GROUP-${group}-IN";
775
776 ruleset_create_chain($ruleset, $chain);
777
778 if ($rules->{in}) {
779 foreach my $rule (@{$rules->{in}}) {
780 ruleset_generate_rule($ruleset, $chain, $rule);
781 }
782 }
783
784 $chain = "GROUP-${group}-OUT";
785
786 ruleset_create_chain($ruleset, $chain);
787 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
788
789 if ($rules->{out}) {
790 foreach my $rule (@{$rules->{out}}) {
791 # we go the PVEFW-SET-ACCEPT-MARK Instead of ACCEPT) because we need to
792 # check also other tap rules (and group rules can be set on any bridge,
793 # so we can't go to VMBRXX-IN)
794 $rule->{action} = 'PVEFW-SET-ACCEPT-MARK' if $rule->{action} eq 'ACCEPT';
795 ruleset_generate_rule($ruleset, $chain, $rule);
796 }
797 }
798 }
799
800 my $MAX_NETS = 32;
801 my $valid_netdev_names = {};
802 for (my $i = 0; $i < $MAX_NETS; $i++) {
803 $valid_netdev_names->{"net$i"} = 1;
804 }
805
806 sub parse_fw_rule {
807 my ($line, $need_iface, $allow_groups) = @_;
808
809 my $macros = get_firewall_macros();
810 my $protocols = get_etc_protocols();
811
812 my ($action, $iface, $source, $dest, $proto, $dport, $sport);
813
814 $line =~ s/#.*$//;
815
816 my @data = split(/\s+/, $line);
817 my $expected_elements = $need_iface ? 7 : 6;
818
819 die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
820
821 if ($need_iface) {
822 ($action, $iface, $source, $dest, $proto, $dport, $sport) = @data
823 } else {
824 ($action, $source, $dest, $proto, $dport, $sport) = @data;
825 }
826
827 die "incomplete rule\n" if !$action;
828
829 my $macro;
830 my $macro_name;
831
832 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
833 # OK
834 } elsif ($allow_groups && $action =~ m/^GROUP-(:?\S+)$/) {
835 # OK
836 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
837 ($macro_name, $action) = ($1, $2);
838 my $lc_macro_name = lc($macro_name);
839 my $preferred_name = $pve_fw_preferred_macro_names->{$lc_macro_name};
840 $macro_name = $preferred_name if $preferred_name;
841 $macro = $macros->{$lc_macro_name};
842 die "unknown macro '$macro_name'\n" if !$macro;
843 } else {
844 die "unknown action '$action'\n";
845 }
846
847 if ($need_iface) {
848 $iface = undef if $iface && $iface eq '-';
849 die "unknown interface '$iface'\n"
850 if defined($iface) && !$valid_netdev_names->{$iface};
851 }
852
853 $proto = undef if $proto && $proto eq '-';
854 die "unknown protokol '$proto'\n" if $proto &&
855 !(defined($protocols->{byname}->{$proto}) ||
856 defined($protocols->{byid}->{$proto}));
857
858 $source = undef if $source && $source eq '-';
859 $dest = undef if $dest && $dest eq '-';
860
861 $dport = undef if $dport && $dport eq '-';
862 $sport = undef if $sport && $sport eq '-';
863
864 my $nbsource = undef;
865 my $nbdest = undef;
866
867 $nbsource = parse_address_list($source) if $source;
868 $nbdest = parse_address_list($dest) if $dest;
869
870 my $rules = [];
871
872 my $param = {
873 action => $action,
874 iface => $iface,
875 source => $source,
876 dest => $dest,
877 nbsource => $nbsource,
878 nbdest => $nbdest,
879 proto => $proto,
880 dport => $dport,
881 sport => $sport,
882 };
883
884 if ($macro) {
885 foreach my $templ (@$macro) {
886 my $rule = {};
887 foreach my $k (keys %$templ) {
888 my $v = $templ->{$k};
889 if ($v eq 'PARAM') {
890 $v = $param->{$k};
891 } elsif ($v eq 'DEST') {
892 $v = $param->{dest};
893 } elsif ($v eq 'SOURCE') {
894 $v = $param->{source};
895 }
896
897 die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
898 $rule->{$k} = $v;
899 }
900 push @$rules, $rule;
901 }
902 } else {
903 push @$rules, $param;
904 }
905
906 foreach my $rule (@$rules) {
907 $rule->{nbdport} = parse_port_name_number_or_range($rule->{dport})
908 if defined($rule->{dport});
909 $rule->{nbsport} = parse_port_name_number_or_range($rule->{sport})
910 if defined($rule->{sport});
911 }
912
913 return $rules;
914 }
915
916 sub parse_fw_option {
917 my ($line) = @_;
918
919 my ($opt, $value);
920
921 if ($line =~ m/^enable:\s*(0|1)\s*$/i) {
922 $opt = 'enable';
923 $value = int($1);
924 } elsif ($line =~ m/^(policy-(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
925 $opt = lc($1);
926 $value = uc($3);
927 } else {
928 chomp $line;
929 die "can't parse option '$line'\n"
930 }
931
932 return ($opt, $value);
933 }
934
935 sub parse_vm_fw_rules {
936 my ($filename, $fh) = @_;
937
938 my $res = { in => [], out => [], options => {}};
939
940 my $section;
941
942 while (defined(my $line = <$fh>)) {
943 next if $line =~ m/^#/;
944 next if $line =~ m/^\s*$/;
945
946 my $linenr = $fh->input_line_number();
947 my $prefix = "$filename (line $linenr)";
948
949 if ($line =~ m/^\[(\S+)\]\s*$/i) {
950 $section = lc($1);
951 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
952 next;
953 }
954 if (!$section) {
955 warn "$prefix: skip line - no section";
956 next;
957 }
958
959 next if !$res->{$section}; # skip undefined section
960
961 if ($section eq 'options') {
962 eval {
963 my ($opt, $value) = parse_fw_option($line);
964 $res->{options}->{$opt} = $value;
965 };
966 warn "$prefix: $@" if $@;
967 next;
968 }
969
970 my $rules;
971 eval { $rules = parse_fw_rule($line, 1, 1); };
972 if (my $err = $@) {
973 warn "$prefix: $err";
974 next;
975 }
976
977 push @{$res->{$section}}, @$rules;
978 }
979
980 return $res;
981 }
982
983 sub parse_host_fw_rules {
984 my ($filename, $fh) = @_;
985
986 my $res = { in => [], out => [] };
987
988 my $section;
989
990 while (defined(my $line = <$fh>)) {
991 next if $line =~ m/^#/;
992 next if $line =~ m/^\s*$/;
993
994 my $linenr = $fh->input_line_number();
995 my $prefix = "$filename (line $linenr)";
996
997 if ($line =~ m/^\[(in|out)\]\s*$/i) {
998 $section = lc($1);
999 next;
1000 }
1001 if (!$section) {
1002 warn "$prefix: skip line - no section";
1003 next;
1004 }
1005
1006 my $rules;
1007 eval { $rules = parse_fw_rule($line, 1, 1); };
1008 if (my $err = $@) {
1009 warn "$prefix: $err";
1010 next;
1011 }
1012
1013 push @{$res->{$section}}, @$rules;
1014 }
1015
1016 return $res;
1017 }
1018
1019 sub parse_group_fw_rules {
1020 my ($filename, $fh) = @_;
1021
1022 my $section;
1023 my $group;
1024
1025 my $res = { in => [], out => [] };
1026
1027 while (defined(my $line = <$fh>)) {
1028 next if $line =~ m/^#/;
1029 next if $line =~ m/^\s*$/;
1030
1031 my $linenr = $fh->input_line_number();
1032 my $prefix = "$filename (line $linenr)";
1033
1034 if ($line =~ m/^\[(in|out):(\S+)\]\s*$/i) {
1035 $section = lc($1);
1036 $group = lc($2);
1037 next;
1038 }
1039 if (!$section || !$group) {
1040 warn "$prefix: skip line - no section";
1041 next;
1042 }
1043
1044 my $rules;
1045 eval { $rules = parse_fw_rule($line, 0, 0); };
1046 if (my $err = $@) {
1047 warn "$prefix: $err";
1048 next;
1049 }
1050
1051 push @{$res->{$group}->{$section}}, @$rules;
1052 }
1053
1054 return $res;
1055 }
1056
1057 sub run_locked {
1058 my ($code, @param) = @_;
1059
1060 my $timeout = 10;
1061
1062 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
1063
1064 die $@ if $@;
1065
1066 return $res;
1067 }
1068
1069 sub read_local_vm_config {
1070
1071 my $openvz = {};
1072
1073 my $qemu = {};
1074
1075 my $list = PVE::QemuServer::config_list();
1076
1077 foreach my $vmid (keys %$list) {
1078 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
1079 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1080 $qemu->{$vmid} = $conf;
1081 }
1082 }
1083
1084 my $vmdata = { openvz => $openvz, qemu => $qemu };
1085
1086 return $vmdata;
1087 };
1088
1089 sub read_vm_firewall_rules {
1090 my ($vmdata) = @_;
1091 my $rules = {};
1092 foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
1093 my $filename = "/etc/pve/firewall/$vmid.fw";
1094 my $fh = IO::File->new($filename, O_RDONLY);
1095 next if !$fh;
1096
1097 $rules->{$vmid} = parse_vm_fw_rules($filename, $fh);
1098 }
1099
1100 return $rules;
1101 }
1102
1103 sub compile {
1104 my $vmdata = read_local_vm_config();
1105 my $rules = read_vm_firewall_rules($vmdata);
1106
1107 my $group_rules = {};
1108 my $filename = "/etc/pve/firewall/groups.fw";
1109 if (my $fh = IO::File->new($filename, O_RDONLY)) {
1110 $group_rules = parse_group_fw_rules($filename, $fh);
1111 }
1112
1113 #print Dumper($rules);
1114
1115 my $ruleset = {};
1116
1117 ruleset_create_chain($ruleset, "PVEFW-INPUT");
1118 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
1119 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
1120
1121 ruleset_create_chain($ruleset, "PVEFW-SET-ACCEPT-MARK");
1122 ruleset_addrule($ruleset, "PVEFW-SET-ACCEPT-MARK", "-j MARK --set-mark 1");
1123
1124 my $enable_hostfw = 0;
1125 $filename = "/etc/pve/local/host.fw";
1126 if (my $fh = IO::File->new($filename, O_RDONLY)) {
1127 my $host_rules = parse_host_fw_rules($filename, $fh);
1128
1129 $enable_hostfw = 1;
1130
1131 enablehostfw($ruleset, $host_rules, $group_rules);
1132 }
1133
1134 # generate firewall rules for QEMU VMs
1135 foreach my $vmid (keys %{$vmdata->{qemu}}) {
1136 my $conf = $vmdata->{qemu}->{$vmid};
1137
1138 next if !$rules->{$vmid};
1139 my $options = $rules->{$vmid}->{options};
1140 next if defined($options->{enable}) && ($options->{enable} == 0);
1141
1142 foreach my $netid (keys %$conf) {
1143 next if $netid !~ m/^net(\d+)$/;
1144 my $net = PVE::QemuServer::parse_net($conf->{$netid});
1145 next if !$net;
1146 my $iface = "tap${vmid}i$1";
1147
1148 my $bridge = $net->{bridge};
1149 next if !$bridge; # fixme: ?
1150
1151 $bridge .= "v$net->{tag}" if $net->{tag};
1152
1153
1154 generate_bridge_chains($ruleset, $bridge);
1155
1156 my $macaddr = $net->{macaddr};
1157 generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $rules->{$vmid}->{in}, $bridge, 'IN');
1158 generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $rules->{$vmid}->{out}, $bridge, 'OUT');
1159 }
1160 }
1161
1162 if ($enable_hostfw) {
1163 # allow traffic from lo (ourself)
1164 ruleset_addrule($ruleset, "PVEFW-INPUT", "-i lo -j ACCEPT");
1165 }
1166
1167 return $ruleset;
1168 }
1169
1170 sub get_ruleset_status {
1171 my ($ruleset, $verbose) = @_;
1172
1173 my $active_chains = iptables_get_chains();
1174
1175 my $statushash = {};
1176
1177 foreach my $chain (sort keys %$ruleset) {
1178 my $digest = Digest::SHA->new('sha1');
1179 foreach my $cmd (@{$ruleset->{$chain}}) {
1180 $digest->add("$cmd\n");
1181 }
1182 my $sig = $digest->b64digest;
1183 $statushash->{$chain}->{sig} = $sig;
1184
1185 my $oldsig = $active_chains->{$chain};
1186 if (!defined($oldsig)) {
1187 $statushash->{$chain}->{action} = 'create';
1188 } else {
1189 if ($oldsig eq $sig) {
1190 $statushash->{$chain}->{action} = 'exists';
1191 } else {
1192 $statushash->{$chain}->{action} = 'update';
1193 }
1194 }
1195 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
1196 foreach my $cmd (@{$ruleset->{$chain}}) {
1197 print "\t$cmd\n" if $verbose;
1198 }
1199 }
1200
1201 foreach my $chain (sort keys %$active_chains) {
1202 if (!defined($ruleset->{$chain})) {
1203 my $sig = $active_chains->{$chain};
1204 $statushash->{$chain}->{action} = 'delete';
1205 $statushash->{$chain}->{sig} = $sig;
1206 print "delete $chain ($sig)\n" if $verbose;
1207 }
1208 }
1209
1210 return $statushash;
1211 }
1212
1213 sub print_ruleset {
1214 my ($ruleset) = @_;
1215
1216 get_ruleset_status($ruleset, 1);
1217 }
1218
1219 sub print_sig_rule {
1220 my ($chain, $sig) = @_;
1221
1222 # We just use this to store a SHA1 checksum used to detect changes
1223 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
1224 }
1225
1226 sub apply_ruleset {
1227 my ($ruleset, $verbose) = @_;
1228
1229 enable_bridge_firewall();
1230
1231 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
1232
1233 my $statushash = get_ruleset_status($ruleset, $verbose);
1234
1235 # create missing chains first
1236 foreach my $chain (sort keys %$ruleset) {
1237 my $stat = $statushash->{$chain};
1238 die "internal error" if !$stat;
1239 next if $stat->{action} ne 'create';
1240
1241 $cmdlist .= ":$chain - [0:0]\n";
1242 }
1243
1244 my $rule = "INPUT -j PVEFW-INPUT";
1245 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1246 $cmdlist .= "-A $rule\n";
1247 }
1248 $rule = "OUTPUT -j PVEFW-OUTPUT";
1249 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1250 $cmdlist .= "-A $rule\n";
1251 }
1252
1253 $rule = "FORWARD -j PVEFW-FORWARD";
1254 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1255 $cmdlist .= "-A $rule\n";
1256 }
1257
1258 foreach my $chain (sort keys %$ruleset) {
1259 my $stat = $statushash->{$chain};
1260 die "internal error" if !$stat;
1261
1262 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
1263 $cmdlist .= "-F $chain\n";
1264 foreach my $cmd (@{$ruleset->{$chain}}) {
1265 $cmdlist .= "$cmd\n";
1266 }
1267 $cmdlist .= print_sig_rule($chain, $stat->{sig});
1268 } elsif ($stat->{action} eq 'delete') {
1269 die "internal error"; # this should not happen
1270 } elsif ($stat->{action} eq 'exists') {
1271 # do nothing
1272 } else {
1273 die "internal error - unknown status '$stat->{action}'";
1274 }
1275 }
1276
1277 foreach my $chain (keys %$statushash) {
1278 next if $statushash->{$chain}->{action} ne 'delete';
1279 $cmdlist .= "-F $chain\n";
1280 }
1281 foreach my $chain (keys %$statushash) {
1282 next if $statushash->{$chain}->{action} ne 'delete';
1283 next if $chain eq 'PVEFW-INPUT';
1284 next if $chain eq 'PVEFW-OUTPUT';
1285 next if $chain eq 'PVEFW-FORWARD';
1286 $cmdlist .= "-X $chain\n";
1287 }
1288
1289 $cmdlist .= "COMMIT\n";
1290
1291 print $cmdlist if $verbose;
1292
1293 iptables_restore_cmdlist($cmdlist);
1294
1295 # test: re-read status and check if everything is up to date
1296 $statushash = get_ruleset_status($ruleset);
1297
1298 my $errors;
1299 foreach my $chain (sort keys %$ruleset) {
1300 my $stat = $statushash->{$chain};
1301 if ($stat->{action} ne 'exists') {
1302 warn "unable to update chain '$chain'\n";
1303 $errors = 1;
1304 }
1305 }
1306
1307 die "unable to apply firewall changes\n" if $errors;
1308 }
1309
1310 1;