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integrate logging into ruleset_addrule
[pve-firewall.git] / src / PVE / Firewall.pm
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1package PVE::Firewall;
2
3use warnings;
4use strict;
5use POSIX;
6use Data::Dumper;
7use Digest::SHA;
8use Socket qw(AF_INET6 inet_ntop inet_pton);
9use PVE::INotify;
10use PVE::Exception qw(raise raise_param_exc);
11use PVE::JSONSchema qw(register_standard_option get_standard_option);
12use PVE::Cluster;
13use PVE::ProcFSTools;
14use PVE::Tools qw($IPV4RE $IPV6RE);
15use PVE::Network;
16use PVE::SafeSyslog;
17use File::Basename;
18use File::Path;
19use IO::File;
20use Net::IP;
21use PVE::Tools qw(run_command lock_file dir_glob_foreach);
22use Encode;
23
24my $hostfw_conf_filename = "/etc/pve/local/host.fw";
25my $pvefw_conf_dir = "/etc/pve/firewall";
26my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
27
28# dynamically include PVE::QemuServer and PVE::LXC
29# to avoid dependency problems
30my $have_qemu_server;
31eval {
32 require PVE::QemuServer;
33 require PVE::QemuConfig;
34 $have_qemu_server = 1;
35};
36
37my $have_lxc;
38eval {
39 require PVE::LXC;
40 $have_lxc = 1;
41};
42
43
44my $pve_fw_status_dir = "/var/lib/pve-firewall";
45
46mkdir $pve_fw_status_dir; # make sure this exists
47
48my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
49my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
50our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
51
52my $max_alias_name_length = 64;
53my $max_ipset_name_length = 64;
54my $max_group_name_length = 18;
55
56my $PROTOCOLS_WITH_PORTS = {
57 udp => 1, 17 => 1,
58 udplite => 1, 136 => 1,
59 tcp => 1, 6 => 1,
60 dccp => 1, 33 => 1,
61 sctp => 1, 132 => 1,
62};
63
64PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
65sub pve_verify_ip_or_cidr {
66 my ($cidr, $noerr) = @_;
67
68 if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
69 return $cidr if Net::IP->new($cidr);
70 return undef if $noerr;
71 die Net::IP::Error() . "\n";
72 }
73 return undef if $noerr;
74 die "value does not look like a valid IP address or CIDR network\n";
75}
76
77PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
78sub pve_verify_ip_or_cidr_or_alias {
79 my ($cidr, $noerr) = @_;
80
81 return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
82
83 return pve_verify_ip_or_cidr($cidr, $noerr);
84}
85
86PVE::JSONSchema::register_standard_option('ipset-name', {
87 description => "IP set name.",
88 type => 'string',
89 pattern => $ipset_name_pattern,
90 minLength => 2,
91 maxLength => $max_ipset_name_length,
92});
93
94PVE::JSONSchema::register_standard_option('pve-fw-alias', {
95 description => "Alias name.",
96 type => 'string',
97 pattern => $ip_alias_pattern,
98 minLength => 2,
99 maxLength => $max_alias_name_length,
100});
101
102PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
103 description => "Log level.",
104 type => 'string',
105 enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
106 optional => 1,
107});
108
109PVE::JSONSchema::register_standard_option('pve-security-group-name', {
110 description => "Security Group name.",
111 type => 'string',
112 pattern => $security_group_name_pattern,
113 minLength => 2,
114 maxLength => $max_group_name_length,
115});
116
117my $feature_ipset_nomatch = 0;
118eval {
119 my (undef, undef, $release) = POSIX::uname();
120 if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
121 my ($major, $minor) = ($1, $2);
122 $feature_ipset_nomatch = 1 if ($major > 3) ||
123 ($major == 3 && $minor >= 7);
124 }
125
126};
127
128my $nodename = PVE::INotify::nodename();
129
130my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
131
132my $default_log_level = 'nolog'; # avoid logs by default
133
134my $log_level_hash = {
135 debug => 7,
136 info => 6,
137 notice => 5,
138 warning => 4,
139 err => 3,
140 crit => 2,
141 alert => 1,
142 emerg => 0,
143};
144
145# we need to overwrite some macros for ipv6
146my $pve_ipv6fw_macros = {
147 'Ping' => [
148 { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
149 ],
150 'NeighborDiscovery' => [
151 "IPv6 neighbor solicitation, neighbor and router advertisement",
152 { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
153 { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
154 { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
155 { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
156 ],
157 'DHCPv6' => [
158 "DHCPv6 traffic",
159 { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
160 ],
161 'Trcrt' => [
162 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
163 { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
164 ],
165 };
166
167# imported/converted from: /usr/share/shorewall/macro.*
168my $pve_fw_macros = {
169 'Amanda' => [
170 "Amanda Backup",
171 { action => 'PARAM', proto => 'udp', dport => '10080' },
172 { action => 'PARAM', proto => 'tcp', dport => '10080' },
173 ],
174 'Auth' => [
175 "Auth (identd) traffic",
176 { action => 'PARAM', proto => 'tcp', dport => '113' },
177 ],
178 'BGP' => [
179 "Border Gateway Protocol traffic",
180 { action => 'PARAM', proto => 'tcp', dport => '179' },
181 ],
182 'BitTorrent' => [
183 "BitTorrent traffic for BitTorrent 3.1 and earlier",
184 { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
185 { action => 'PARAM', proto => 'udp', dport => '6881' },
186 ],
187 'BitTorrent32' => [
188 "BitTorrent traffic for BitTorrent 3.2 and later",
189 { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
190 { action => 'PARAM', proto => 'udp', dport => '6881' },
191 ],
192 'Ceph' => [
193 "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
194 { action => 'PARAM', proto => 'tcp', dport => '6789' },
195 { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
196 ],
197 'CVS' => [
198 "Concurrent Versions System pserver traffic",
199 { action => 'PARAM', proto => 'tcp', dport => '2401' },
200 ],
201 'Citrix' => [
202 "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
203 { action => 'PARAM', proto => 'tcp', dport => '1494' },
204 { action => 'PARAM', proto => 'udp', dport => '1604' },
205 { action => 'PARAM', proto => 'tcp', dport => '2598' },
206 ],
207 'DAAP' => [
208 "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
209 { action => 'PARAM', proto => 'tcp', dport => '3689' },
210 { action => 'PARAM', proto => 'udp', dport => '3689' },
211 ],
212 'DCC' => [
213 "Distributed Checksum Clearinghouse spam filtering mechanism",
214 { action => 'PARAM', proto => 'tcp', dport => '6277' },
215 ],
216 'DHCPfwd' => [
217 "Forwarded DHCP traffic",
218 { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
219 ],
220 'DNS' => [
221 "Domain Name System traffic (upd and tcp)",
222 { action => 'PARAM', proto => 'udp', dport => '53' },
223 { action => 'PARAM', proto => 'tcp', dport => '53' },
224 ],
225 'Distcc' => [
226 "Distributed Compiler service",
227 { action => 'PARAM', proto => 'tcp', dport => '3632' },
228 ],
229 'FTP' => [
230 "File Transfer Protocol",
231 { action => 'PARAM', proto => 'tcp', dport => '21' },
232 ],
233 'Finger' => [
234 "Finger protocol (RFC 742)",
235 { action => 'PARAM', proto => 'tcp', dport => '79' },
236 ],
237 'GNUnet' => [
238 "GNUnet secure peer-to-peer networking traffic",
239 { action => 'PARAM', proto => 'tcp', dport => '2086' },
240 { action => 'PARAM', proto => 'udp', dport => '2086' },
241 { action => 'PARAM', proto => 'tcp', dport => '1080' },
242 { action => 'PARAM', proto => 'udp', dport => '1080' },
243 ],
244 'GRE' => [
245 "Generic Routing Encapsulation tunneling protocol",
246 { action => 'PARAM', proto => '47' },
247 ],
248 'Git' => [
249 "Git distributed revision control traffic",
250 { action => 'PARAM', proto => 'tcp', dport => '9418' },
251 ],
252 'HKP' => [
253 "OpenPGP HTTP keyserver protocol traffic",
254 { action => 'PARAM', proto => 'tcp', dport => '11371' },
255 ],
256 'HTTP' => [
257 "Hypertext Transfer Protocol (WWW)",
258 { action => 'PARAM', proto => 'tcp', dport => '80' },
259 ],
260 'HTTPS' => [
261 "Hypertext Transfer Protocol (WWW) over SSL",
262 { action => 'PARAM', proto => 'tcp', dport => '443' },
263 ],
264 'ICPV2' => [
265 "Internet Cache Protocol V2 (Squid) traffic",
266 { action => 'PARAM', proto => 'udp', dport => '3130' },
267 ],
268 'ICQ' => [
269 "AOL Instant Messenger traffic",
270 { action => 'PARAM', proto => 'tcp', dport => '5190' },
271 ],
272 'IMAP' => [
273 "Internet Message Access Protocol",
274 { action => 'PARAM', proto => 'tcp', dport => '143' },
275 ],
276 'IMAPS' => [
277 "Internet Message Access Protocol over SSL",
278 { action => 'PARAM', proto => 'tcp', dport => '993' },
279 ],
280 'IPIP' => [
281 "IPIP capsulation traffic",
282 { action => 'PARAM', proto => '94' },
283 ],
284 'IPsec' => [
285 "IPsec traffic",
286 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
287 { action => 'PARAM', proto => '50' },
288 ],
289 'IPsecah' => [
290 "IPsec authentication (AH) traffic",
291 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
292 { action => 'PARAM', proto => '51' },
293 ],
294 'IPsecnat' => [
295 "IPsec traffic and Nat-Traversal",
296 { action => 'PARAM', proto => 'udp', dport => '500' },
297 { action => 'PARAM', proto => 'udp', dport => '4500' },
298 { action => 'PARAM', proto => '50' },
299 ],
300 'IRC' => [
301 "Internet Relay Chat traffic",
302 { action => 'PARAM', proto => 'tcp', dport => '6667' },
303 ],
304 'Jetdirect' => [
305 "HP Jetdirect printing",
306 { action => 'PARAM', proto => 'tcp', dport => '9100' },
307 ],
308 'L2TP' => [
309 "Layer 2 Tunneling Protocol traffic",
310 { action => 'PARAM', proto => 'udp', dport => '1701' },
311 ],
312 'LDAP' => [
313 "Lightweight Directory Access Protocol traffic",
314 { action => 'PARAM', proto => 'tcp', dport => '389' },
315 ],
316 'LDAPS' => [
317 "Secure Lightweight Directory Access Protocol traffic",
318 { action => 'PARAM', proto => 'tcp', dport => '636' },
319 ],
320 'MSNP' => [
321 "Microsoft Notification Protocol",
322 { action => 'PARAM', proto => 'tcp', dport => '1863' },
323 ],
324 'MSSQL' => [
325 "Microsoft SQL Server",
326 { action => 'PARAM', proto => 'tcp', dport => '1433' },
327 ],
328 'Mail' => [
329 "Mail traffic (SMTP, SMTPS, Submission)",
330 { action => 'PARAM', proto => 'tcp', dport => '25' },
331 { action => 'PARAM', proto => 'tcp', dport => '465' },
332 { action => 'PARAM', proto => 'tcp', dport => '587' },
333 ],
334 'MDNS' => [
335 "Multicast DNS",
336 { action => 'PARAM', proto => 'udp', dport => '5353' },
337 ],
338 'Munin' => [
339 "Munin networked resource monitoring traffic",
340 { action => 'PARAM', proto => 'tcp', dport => '4949' },
341 ],
342 'MySQL' => [
343 "MySQL server",
344 { action => 'PARAM', proto => 'tcp', dport => '3306' },
345 ],
346 'NNTP' => [
347 "NNTP traffic (Usenet).",
348 { action => 'PARAM', proto => 'tcp', dport => '119' },
349 ],
350 'NNTPS' => [
351 "Encrypted NNTP traffic (Usenet)",
352 { action => 'PARAM', proto => 'tcp', dport => '563' },
353 ],
354 'NTP' => [
355 "Network Time Protocol (ntpd)",
356 { action => 'PARAM', proto => 'udp', dport => '123' },
357 ],
358 'OSPF' => [
359 "OSPF multicast traffic",
360 { action => 'PARAM', proto => '89' },
361 ],
362 'OpenVPN' => [
363 "OpenVPN traffic",
364 { action => 'PARAM', proto => 'udp', dport => '1194' },
365 ],
366 'PCA' => [
367 "Symantec PCAnywere (tm)",
368 { action => 'PARAM', proto => 'udp', dport => '5632' },
369 { action => 'PARAM', proto => 'tcp', dport => '5631' },
370 ],
371 'POP3' => [
372 "POP3 traffic",
373 { action => 'PARAM', proto => 'tcp', dport => '110' },
374 ],
375 'POP3S' => [
376 "Encrypted POP3 traffic",
377 { action => 'PARAM', proto => 'tcp', dport => '995' },
378 ],
379 'PPtP' => [
380 "Point-to-Point Tunneling Protocol",
381 { action => 'PARAM', proto => '47' },
382 { action => 'PARAM', proto => 'tcp', dport => '1723' },
383 ],
384 'Ping' => [
385 "ICMP echo request",
386 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
387 ],
388 'PostgreSQL' => [
389 "PostgreSQL server",
390 { action => 'PARAM', proto => 'tcp', dport => '5432' },
391 ],
392 'Printer' => [
393 "Line Printer protocol printing",
394 { action => 'PARAM', proto => 'tcp', dport => '515' },
395 ],
396 'RDP' => [
397 "Microsoft Remote Desktop Protocol traffic",
398 { action => 'PARAM', proto => 'tcp', dport => '3389' },
399 ],
400 'RIP' => [
401 "Routing Information Protocol (bidirectional)",
402 { action => 'PARAM', proto => 'udp', dport => '520' },
403 ],
404 'RNDC' => [
405 "BIND remote management protocol",
406 { action => 'PARAM', proto => 'tcp', dport => '953' },
407 ],
408 'Razor' => [
409 "Razor Antispam System",
410 { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
411 ],
412 'Rdate' => [
413 "Remote time retrieval (rdate)",
414 { action => 'PARAM', proto => 'tcp', dport => '37' },
415 ],
416 'Rsync' => [
417 "Rsync server",
418 { action => 'PARAM', proto => 'tcp', dport => '873' },
419 ],
420 'SANE' => [
421 "SANE network scanning",
422 { action => 'PARAM', proto => 'tcp', dport => '6566' },
423 ],
424 'SMB' => [
425 "Microsoft SMB traffic",
426 { action => 'PARAM', proto => 'udp', dport => '135,445' },
427 { action => 'PARAM', proto => 'udp', dport => '137:139' },
428 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
429 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
430 ],
431 'SMBswat' => [
432 "Samba Web Administration Tool",
433 { action => 'PARAM', proto => 'tcp', dport => '901' },
434 ],
435 'SMTP' => [
436 "Simple Mail Transfer Protocol",
437 { action => 'PARAM', proto => 'tcp', dport => '25' },
438 ],
439 'SMTPS' => [
440 "Encrypted Simple Mail Transfer Protocol",
441 { action => 'PARAM', proto => 'tcp', dport => '465' },
442 ],
443 'SNMP' => [
444 "Simple Network Management Protocol",
445 { action => 'PARAM', proto => 'udp', dport => '161:162' },
446 { action => 'PARAM', proto => 'tcp', dport => '161' },
447 ],
448 'SPAMD' => [
449 "Spam Assassin SPAMD traffic",
450 { action => 'PARAM', proto => 'tcp', dport => '783' },
451 ],
452 'SSH' => [
453 "Secure shell traffic",
454 { action => 'PARAM', proto => 'tcp', dport => '22' },
455 ],
456 'SVN' => [
457 "Subversion server (svnserve)",
458 { action => 'PARAM', proto => 'tcp', dport => '3690' },
459 ],
460 'SixXS' => [
461 "SixXS IPv6 Deployment and Tunnel Broker",
462 { action => 'PARAM', proto => 'tcp', dport => '3874' },
463 { action => 'PARAM', proto => 'udp', dport => '3740' },
464 { action => 'PARAM', proto => '41' },
465 { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
466 ],
467 'Squid' => [
468 "Squid web proxy traffic",
469 { action => 'PARAM', proto => 'tcp', dport => '3128' },
470 ],
471 'Submission' => [
472 "Mail message submission traffic",
473 { action => 'PARAM', proto => 'tcp', dport => '587' },
474 ],
475 'Syslog' => [
476 "Syslog protocol (RFC 5424) traffic",
477 { action => 'PARAM', proto => 'udp', dport => '514' },
478 { action => 'PARAM', proto => 'tcp', dport => '514' },
479 ],
480 'TFTP' => [
481 "Trivial File Transfer Protocol traffic",
482 { action => 'PARAM', proto => 'udp', dport => '69' },
483 ],
484 'Telnet' => [
485 "Telnet traffic",
486 { action => 'PARAM', proto => 'tcp', dport => '23' },
487 ],
488 'Telnets' => [
489 "Telnet over SSL",
490 { action => 'PARAM', proto => 'tcp', dport => '992' },
491 ],
492 'Time' => [
493 "RFC 868 Time protocol",
494 { action => 'PARAM', proto => 'tcp', dport => '37' },
495 ],
496 'Trcrt' => [
497 "Traceroute (for up to 30 hops) traffic",
498 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
499 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
500 ],
501 'VNC' => [
502 "VNC traffic for VNC display's 0 - 99",
503 { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
504 ],
505 'VNCL' => [
506 "VNC traffic from Vncservers to Vncviewers in listen mode",
507 { action => 'PARAM', proto => 'tcp', dport => '5500' },
508 ],
509 'Web' => [
510 "WWW traffic (HTTP and HTTPS)",
511 { action => 'PARAM', proto => 'tcp', dport => '80' },
512 { action => 'PARAM', proto => 'tcp', dport => '443' },
513 ],
514 'Webcache' => [
515 "Web Cache/Proxy traffic (port 8080)",
516 { action => 'PARAM', proto => 'tcp', dport => '8080' },
517 ],
518 'Webmin' => [
519 "Webmin traffic",
520 { action => 'PARAM', proto => 'tcp', dport => '10000' },
521 ],
522 'Whois' => [
523 "Whois (nicname, RFC 3912) traffic",
524 { action => 'PARAM', proto => 'tcp', dport => '43' },
525 ],
526};
527
528my $pve_fw_parsed_macros;
529my $pve_fw_macro_descr;
530my $pve_fw_macro_ipversion = {};
531my $pve_fw_preferred_macro_names = {};
532
533my $FWACCEPTMARK_ON = "0x80000000/0x80000000";
534my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
535
536my $pve_std_chains = {};
537$pve_std_chains->{4} = {
538 'PVEFW-SET-ACCEPT-MARK' => [
539 "-j MARK --set-mark $FWACCEPTMARK_ON",
540 ],
541 'PVEFW-DropBroadcast' => [
542 # same as shorewall 'Broadcast'
543 # simply DROP BROADCAST/MULTICAST/ANYCAST
544 # we can use this to reduce logging
545 { action => 'DROP', dsttype => 'BROADCAST' },
546 { action => 'DROP', dsttype => 'MULTICAST' },
547 { action => 'DROP', dsttype => 'ANYCAST' },
548 { action => 'DROP', dest => '224.0.0.0/4' },
549 ],
550 'PVEFW-reject' => [
551 # same as shorewall 'reject'
552 { action => 'DROP', dsttype => 'BROADCAST' },
553 { action => 'DROP', source => '224.0.0.0/4' },
554 { action => 'DROP', proto => 'icmp' },
555 "-p tcp -j REJECT --reject-with tcp-reset",
556 "-p udp -j REJECT --reject-with icmp-port-unreachable",
557 "-p icmp -j REJECT --reject-with icmp-host-unreachable",
558 "-j REJECT --reject-with icmp-host-prohibited",
559 ],
560 'PVEFW-Drop' => [
561 # same as shorewall 'Drop', which is equal to DROP,
562 # but REJECT/DROP some packages to reduce logging,
563 # and ACCEPT critical ICMP types
564 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
565 # we are not interested in BROADCAST/MULTICAST/ANYCAST
566 { action => 'PVEFW-DropBroadcast' },
567 # ACCEPT critical ICMP types
568 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
569 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
570 # Drop packets with INVALID state
571 "-m conntrack --ctstate INVALID -j DROP",
572 # Drop Microsoft SMB noise
573 { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
574 { action => 'DROP', proto => 'udp', dport => '137:139'},
575 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
576 { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
577 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
578 # Drop new/NotSyn traffic so that it doesn't get logged
579 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
580 # Drop DNS replies
581 { action => 'DROP', proto => 'udp', sport => 53 },
582 ],
583 'PVEFW-Reject' => [
584 # same as shorewall 'Reject', which is equal to Reject,
585 # but REJECT/DROP some packages to reduce logging,
586 # and ACCEPT critical ICMP types
587 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
588 # we are not interested in BROADCAST/MULTICAST/ANYCAST
589 { action => 'PVEFW-DropBroadcast' },
590 # ACCEPT critical ICMP types
591 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
592 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
593 # Drop packets with INVALID state
594 "-m conntrack --ctstate INVALID -j DROP",
595 # Drop Microsoft SMB noise
596 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
597 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
598 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
599 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
600 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
601 # Drop new/NotSyn traffic so that it doesn't get logged
602 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
603 # Drop DNS replies
604 { action => 'DROP', proto => 'udp', sport => 53 },
605 ],
606 'PVEFW-tcpflags' => [
607 # same as shorewall tcpflags action.
608 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
609 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
610 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
611 "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
612 "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
613 "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
614 ],
615 'PVEFW-smurfs' => [
616 # same as shorewall smurfs action
617 # Filter packets for smurfs (packets with a broadcast address as the source).
618 "-s 0.0.0.0/32 -j RETURN", # allow DHCP
619 "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
620 "-s 224.0.0.0/4 -g PVEFW-smurflog",
621 ],
622};
623
624$pve_std_chains->{6} = {
625 'PVEFW-SET-ACCEPT-MARK' => [
626 "-j MARK --set-mark $FWACCEPTMARK_ON",
627 ],
628 'PVEFW-DropBroadcast' => [
629 # same as shorewall 'Broadcast'
630 # simply DROP BROADCAST/MULTICAST/ANYCAST
631 # we can use this to reduce logging
632 #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
633 # ipv6 addrtype does not work with kernel 2.6.32
634 #{ action => 'DROP', dsttype => 'MULTICAST' },
635 #{ action => 'DROP', dsttype => 'ANYCAST' },
636 { action => 'DROP', dest => 'ff00::/8' },
637 #{ action => 'DROP', dest => '224.0.0.0/4' },
638 ],
639 'PVEFW-reject' => [
640 # same as shorewall 'reject'
641 #{ action => 'DROP', dsttype => 'BROADCAST' },
642 #{ action => 'DROP', source => '224.0.0.0/4' },
643 { action => 'DROP', proto => 'icmpv6' },
644 "-p tcp -j REJECT --reject-with tcp-reset",
645 #"-p udp -j REJECT --reject-with icmp-port-unreachable",
646 #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
647 #"-j REJECT --reject-with icmp-host-prohibited",
648 ],
649 'PVEFW-Drop' => [
650 # same as shorewall 'Drop', which is equal to DROP,
651 # but REJECT/DROP some packages to reduce logging,
652 # and ACCEPT critical ICMP types
653 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
654 # we are not interested in BROADCAST/MULTICAST/ANYCAST
655 { action => 'PVEFW-DropBroadcast' },
656 # ACCEPT critical ICMP types
657 { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
658 { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
659 { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
660
661 # Drop packets with INVALID state
662 "-m conntrack --ctstate INVALID -j DROP",
663 # Drop Microsoft SMB noise
664 { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
665 { action => 'DROP', proto => 'udp', dport => '137:139'},
666 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
667 { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
668 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
669 # Drop new/NotSyn traffic so that it doesn't get logged
670 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
671 # Drop DNS replies
672 { action => 'DROP', proto => 'udp', sport => 53 },
673 ],
674 'PVEFW-Reject' => [
675 # same as shorewall 'Reject', which is equal to Reject,
676 # but REJECT/DROP some packages to reduce logging,
677 # and ACCEPT critical ICMP types
678 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
679 # we are not interested in BROADCAST/MULTICAST/ANYCAST
680 { action => 'PVEFW-DropBroadcast' },
681 # ACCEPT critical ICMP types
682 { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
683 { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
684 { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
685
686 # Drop packets with INVALID state
687 "-m conntrack --ctstate INVALID -j DROP",
688 # Drop Microsoft SMB noise
689 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
690 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
691 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
692 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
693 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
694 # Drop new/NotSyn traffic so that it doesn't get logged
695 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
696 # Drop DNS replies
697 { action => 'DROP', proto => 'udp', sport => 53 },
698 ],
699 'PVEFW-tcpflags' => [
700 # same as shorewall tcpflags action.
701 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
702 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
703 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
704 "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
705 "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
706 "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
707 ],
708};
709
710# iptables -p icmp -h
711my $icmp_type_names = {
712 any => 1,
713 'echo-reply' => 1,
714 'destination-unreachable' => 1,
715 'network-unreachable' => 1,
716 'host-unreachable' => 1,
717 'protocol-unreachable' => 1,
718 'port-unreachable' => 1,
719 'fragmentation-needed' => 1,
720 'source-route-failed' => 1,
721 'network-unknown' => 1,
722 'host-unknown' => 1,
723 'network-prohibited' => 1,
724 'host-prohibited' => 1,
725 'TOS-network-unreachable' => 1,
726 'TOS-host-unreachable' => 1,
727 'communication-prohibited' => 1,
728 'host-precedence-violation' => 1,
729 'precedence-cutoff' => 1,
730 'source-quench' => 1,
731 'redirect' => 1,
732 'network-redirect' => 1,
733 'host-redirect' => 1,
734 'TOS-network-redirect' => 1,
735 'TOS-host-redirect' => 1,
736 'echo-request' => 1,
737 'router-advertisement' => 1,
738 'router-solicitation' => 1,
739 'time-exceeded' => 1,
740 'ttl-zero-during-transit' => 1,
741 'ttl-zero-during-reassembly' => 1,
742 'parameter-problem' => 1,
743 'ip-header-bad' => 1,
744 'required-option-missing' => 1,
745 'timestamp-request' => 1,
746 'timestamp-reply' => 1,
747 'address-mask-request' => 1,
748 'address-mask-reply' => 1,
749};
750
751# ip6tables -p icmpv6 -h
752
753my $icmpv6_type_names = {
754 'any' => 1,
755 'destination-unreachable' => 1,
756 'no-route' => 1,
757 'communication-prohibited' => 1,
758 'address-unreachable' => 1,
759 'port-unreachable' => 1,
760 'packet-too-big' => 1,
761 'time-exceeded' => 1,
762 'ttl-zero-during-transit' => 1,
763 'ttl-zero-during-reassembly' => 1,
764 'parameter-problem' => 1,
765 'bad-header' => 1,
766 'unknown-header-type' => 1,
767 'unknown-option' => 1,
768 'echo-request' => 1,
769 'echo-reply' => 1,
770 'router-solicitation' => 1,
771 'router-advertisement' => 1,
772 'neighbor-solicitation' => 1,
773 'neighbour-solicitation' => 1,
774 'neighbor-advertisement' => 1,
775 'neighbour-advertisement' => 1,
776 'redirect' => 1,
777};
778
779sub init_firewall_macros {
780
781 $pve_fw_parsed_macros = {};
782
783 my $parse = sub {
784 my ($k, $macro) = @_;
785 my $lc_name = lc($k);
786 $pve_fw_macro_ipversion->{$k} = 0;
787 while (!ref($macro->[0])) {
788 my $desc = shift @$macro;
789 if ($desc eq 'ipv4only') {
790 $pve_fw_macro_ipversion->{$k} = 4;
791 } elsif ($desc eq 'ipv6only') {
792 $pve_fw_macro_ipversion->{$k} = 6;
793 } else {
794 $pve_fw_macro_descr->{$k} = $desc;
795 }
796 }
797 $pve_fw_preferred_macro_names->{$lc_name} = $k;
798 $pve_fw_parsed_macros->{$k} = $macro;
799 };
800
801 foreach my $k (keys %$pve_fw_macros) {
802 &$parse($k, $pve_fw_macros->{$k});
803 }
804
805 foreach my $k (keys %$pve_ipv6fw_macros) {
806 next if $pve_fw_parsed_macros->{$k};
807 &$parse($k, $pve_ipv6fw_macros->{$k});
808 $pve_fw_macro_ipversion->{$k} = 6;
809 }
810}
811
812init_firewall_macros();
813
814sub get_macros {
815 return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
816}
817
818my $etc_services;
819
820sub get_etc_services {
821
822 return $etc_services if $etc_services;
823
824 my $filename = "/etc/services";
825
826 my $fh = IO::File->new($filename, O_RDONLY);
827 if (!$fh) {
828 warn "unable to read '$filename' - $!\n";
829 return {};
830 }
831
832 my $services = {};
833
834 while (my $line = <$fh>) {
835 chomp ($line);
836 next if $line =~m/^#/;
837 next if ($line =~m/^\s*$/);
838
839 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
840 $services->{byid}->{$2}->{name} = $1;
841 $services->{byid}->{$2}->{port} = $2;
842 $services->{byid}->{$2}->{$3} = 1;
843 $services->{byname}->{$1} = $services->{byid}->{$2};
844 }
845 }
846
847 close($fh);
848
849 $etc_services = $services;
850
851
852 return $etc_services;
853}
854
855my $etc_protocols;
856
857sub get_etc_protocols {
858 return $etc_protocols if $etc_protocols;
859
860 my $filename = "/etc/protocols";
861
862 my $fh = IO::File->new($filename, O_RDONLY);
863 if (!$fh) {
864 warn "unable to read '$filename' - $!\n";
865 return {};
866 }
867
868 my $protocols = {};
869
870 while (my $line = <$fh>) {
871 chomp ($line);
872 next if $line =~m/^#/;
873 next if ($line =~m/^\s*$/);
874
875 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
876 $protocols->{byid}->{$2}->{name} = $1;
877 $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
878 }
879 }
880
881 close($fh);
882
883 # add special case for ICMP v6
884 $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
885 $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
886
887 $etc_protocols = $protocols;
888
889 return $etc_protocols;
890}
891
892my $__local_network;
893
894sub local_network {
895 my ($new_value) = @_;
896
897 $__local_network = $new_value if defined($new_value);
898
899 return $__local_network if defined($__local_network);
900
901 eval {
902 my $nodename = PVE::INotify::nodename();
903
904 my $ip = PVE::Cluster::remote_node_ip($nodename);
905
906 my $testip = Net::IP->new($ip);
907
908 my $isv6 = $testip->version == 6;
909 my $routes = $isv6 ? PVE::ProcFSTools::read_proc_net_ipv6_route()
910 : PVE::ProcFSTools::read_proc_net_route();
911 foreach my $entry (@$routes) {
912 my $mask;
913 if ($isv6) {
914 $mask = $entry->{prefix};
915 next if !$mask; # skip the default route...
916 } else {
917 $mask = $PVE::Network::ipv4_mask_hash_localnet->{$entry->{mask}};
918 next if !defined($mask);
919 }
920 my $cidr = "$entry->{dest}/$mask";
921 my $testnet = Net::IP->new($cidr);
922 my $overlap = $testnet->overlaps($testip);
923 if ($overlap == $Net::IP::IP_B_IN_A_OVERLAP ||
924 $overlap == $Net::IP::IP_IDENTICAL)
925 {
926 $__local_network = $cidr;
927 return;
928 }
929 }
930 };
931 warn $@ if $@;
932
933 return $__local_network;
934}
935
936# ipset names are limited to 31 characters,
937# and we use '-v4' or '-v6' to indicate IP versions,
938# and we use '_swap' suffix for atomic update,
939# for example PVEFW-${VMID}-${ipset_name}_swap
940
941my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
942
943sub compute_ipset_chain_name {
944 my ($vmid, $ipset_name, $ipversion) = @_;
945
946 $vmid = 0 if !defined($vmid);
947
948 my $id = "$vmid-${ipset_name}-v$ipversion";
949
950 if (length($id) > $max_iptables_ipset_name_length) {
951 $id = PVE::Tools::fnv31a_hex($id);
952 }
953
954 return "PVEFW-$id";
955}
956
957sub compute_ipfilter_ipset_name {
958 my ($iface) = @_;
959
960 return "ipfilter-$iface";
961}
962
963sub parse_address_list {
964 my ($str) = @_;
965
966 if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
967 die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
968 return;
969 }
970
971 if ($str =~ m/^${ip_alias_pattern}$/) {
972 die "alias name too long\n" if length($str) > $max_alias_name_length;
973 return;
974 }
975
976 my $count = 0;
977 my $iprange = 0;
978 my $ipversion;
979
980 my @elements = split(/,/, $str);
981 die "extraneous commas in list\n" if $str ne join(',', @elements);
982 foreach my $elem (@elements) {
983 $count++;
984 my $ip = Net::IP->new($elem);
985 if (!$ip) {
986 my $err = Net::IP::Error();
987 die "invalid IP address: $err\n";
988 }
989 $iprange = 1 if $elem =~ m/-/;
990
991 my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
992
993 die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
994 if $ipversion && ($new_ipversion != $ipversion);
995
996 $ipversion = $new_ipversion;
997 }
998
999 die "you can't use a range in a list\n" if $iprange && $count > 1;
1000
1001 return $ipversion;
1002}
1003
1004sub parse_port_name_number_or_range {
1005 my ($str, $dport) = @_;
1006
1007 my $services = PVE::Firewall::get_etc_services();
1008 my $count = 0;
1009 my $icmp_port = 0;
1010
1011 my @elements = split(/,/, $str);
1012 die "extraneous commas in list\n" if $str ne join(',', @elements);
1013 foreach my $item (@elements) {
1014 $count++;
1015 if ($item =~ m/^(\d+):(\d+)$/) {
1016 my ($port1, $port2) = ($1, $2);
1017 die "invalid port '$port1'\n" if $port1 > 65535;
1018 die "invalid port '$port2'\n" if $port2 > 65535;
1019 } elsif ($item =~ m/^(\d+)$/) {
1020 my $port = $1;
1021 die "invalid port '$port'\n" if $port > 65535;
1022 } else {
1023 if ($dport && $icmp_type_names->{$item}) {
1024 $icmp_port = 1;
1025 } elsif ($dport && $icmpv6_type_names->{$item}) {
1026 $icmp_port = 1;
1027 } else {
1028 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1029 }
1030 }
1031 }
1032
1033 die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
1034
1035 return $count;
1036}
1037
1038PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1039sub pve_fw_verify_sport_spec {
1040 my ($portstr) = @_;
1041
1042 parse_port_name_number_or_range($portstr, 0);
1043
1044 return $portstr;
1045}
1046
1047PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1048sub pve_fw_verify_dport_spec {
1049 my ($portstr) = @_;
1050
1051 parse_port_name_number_or_range($portstr, 1);
1052
1053 return $portstr;
1054}
1055
1056PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1057sub pve_fw_verify_addr_spec {
1058 my ($list) = @_;
1059
1060 parse_address_list($list);
1061
1062 return $list;
1063}
1064
1065PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1066sub pve_fw_verify_protocol_spec {
1067 my ($proto) = @_;
1068
1069 my $protocols = get_etc_protocols();
1070
1071 die "unknown protocol '$proto'\n" if $proto &&
1072 !(defined($protocols->{byname}->{$proto}) ||
1073 defined($protocols->{byid}->{$proto}));
1074
1075 return $proto;
1076}
1077
1078
1079# helper function for API
1080
1081sub copy_opject_with_digest {
1082 my ($object) = @_;
1083
1084 my $sha = Digest::SHA->new('sha1');
1085
1086 my $res = {};
1087 foreach my $k (sort keys %$object) {
1088 my $v = $object->{$k};
1089 next if !defined($v);
1090 $res->{$k} = $v;
1091 $sha->add($k, ':', $v, "\n");
1092 }
1093
1094 my $digest = $sha->hexdigest;
1095
1096 $res->{digest} = $digest;
1097
1098 return wantarray ? ($res, $digest) : $res;
1099}
1100
1101sub copy_list_with_digest {
1102 my ($list) = @_;
1103
1104 my $sha = Digest::SHA->new('sha1');
1105
1106 my $res = [];
1107 foreach my $entry (@$list) {
1108 my $data = {};
1109 foreach my $k (sort keys %$entry) {
1110 my $v = $entry->{$k};
1111 next if !defined($v);
1112 $data->{$k} = $v;
1113 # Note: digest ignores refs ($rule->{errors})
1114 # since Digest::SHA expects a series of bytes,
1115 # we have to encode the value here to prevent errors when
1116 # using utf8 characters (eg. in comments)
1117 $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
1118 }
1119 push @$res, $data;
1120 }
1121
1122 my $digest = $sha->hexdigest;
1123
1124 foreach my $entry (@$res) {
1125 $entry->{digest} = $digest;
1126 }
1127
1128 return wantarray ? ($res, $digest) : $res;
1129}
1130
1131our $cluster_option_properties = {
1132 enable => {
1133 description => "Enable or disable the firewall cluster wide.",
1134 type => 'integer',
1135 minimum => 0,
1136 optional => 1,
1137 },
1138 policy_in => {
1139 description => "Input policy.",
1140 type => 'string',
1141 optional => 1,
1142 enum => ['ACCEPT', 'REJECT', 'DROP'],
1143 },
1144 policy_out => {
1145 description => "Output policy.",
1146 type => 'string',
1147 optional => 1,
1148 enum => ['ACCEPT', 'REJECT', 'DROP'],
1149 },
1150};
1151
1152our $host_option_properties = {
1153 enable => {
1154 description => "Enable host firewall rules.",
1155 type => 'boolean',
1156 optional => 1,
1157 },
1158 log_level_in => get_standard_option('pve-fw-loglevel', {
1159 description => "Log level for incoming traffic." }),
1160 log_level_out => get_standard_option('pve-fw-loglevel', {
1161 description => "Log level for outgoing traffic." }),
1162 tcp_flags_log_level => get_standard_option('pve-fw-loglevel', {
1163 description => "Log level for illegal tcp flags filter." }),
1164 smurf_log_level => get_standard_option('pve-fw-loglevel', {
1165 description => "Log level for SMURFS filter." }),
1166 nosmurfs => {
1167 description => "Enable SMURFS filter.",
1168 type => 'boolean',
1169 optional => 1,
1170 },
1171 tcpflags => {
1172 description => "Filter illegal combinations of TCP flags.",
1173 type => 'boolean',
1174 optional => 1,
1175 },
1176 nf_conntrack_max => {
1177 description => "Maximum number of tracked connections.",
1178 type => 'integer',
1179 optional => 1,
1180 minimum => 32768,
1181 },
1182 nf_conntrack_tcp_timeout_established => {
1183 description => "Conntrack established timeout.",
1184 type => 'integer',
1185 optional => 1,
1186 minimum => 7875,
1187 },
1188 ndp => {
1189 description => "Enable NDP.",
1190 type => 'boolean',
1191 optional => 1,
1192 },
1193};
1194
1195our $vm_option_properties = {
1196 enable => {
1197 description => "Enable/disable firewall rules.",
1198 type => 'boolean',
1199 optional => 1,
1200 },
1201 macfilter => {
1202 description => "Enable/disable MAC address filter.",
1203 type => 'boolean',
1204 optional => 1,
1205 },
1206 dhcp => {
1207 description => "Enable DHCP.",
1208 type => 'boolean',
1209 optional => 1,
1210 },
1211 ndp => {
1212 description => "Enable NDP.",
1213 type => 'boolean',
1214 optional => 1,
1215 },
1216 radv => {
1217 description => "Allow sending Router Advertisement.",
1218 type => 'boolean',
1219 optional => 1,
1220 },
1221 ipfilter => {
1222 description => "Enable default IP filters. " .
1223 "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1224 "for every interface. Such ipsets implicitly contain sane default " .
1225 "restrictions such as restricting IPv6 link local addresses to " .
1226 "the one derived from the interface's MAC address. For containers " .
1227 "the configured IP addresses will be implicitly added.",
1228 type => 'boolean',
1229 optional => 1,
1230 },
1231 policy_in => {
1232 description => "Input policy.",
1233 type => 'string',
1234 optional => 1,
1235 enum => ['ACCEPT', 'REJECT', 'DROP'],
1236 },
1237 policy_out => {
1238 description => "Output policy.",
1239 type => 'string',
1240 optional => 1,
1241 enum => ['ACCEPT', 'REJECT', 'DROP'],
1242 },
1243 log_level_in => get_standard_option('pve-fw-loglevel', {
1244 description => "Log level for incoming traffic." }),
1245 log_level_out => get_standard_option('pve-fw-loglevel', {
1246 description => "Log level for outgoing traffic." }),
1247
1248};
1249
1250
1251my $addr_list_descr = "This can refer to a single IP address, an IP set ('+ipsetname') or an IP alias definition. You can also specify an address range like '20.34.101.207-201.3.9.99', or a list of IP addresses and networks (entries are separated by comma). Please do not mix IPv4 and IPv6 addresses inside such lists.";
1252
1253my $port_descr = "You can use service names or simple numbers (0-65535), as defined in '/etc/services'. Port ranges can be specified with '\\d+:\\d+', for example '80:85', and you can use comma separated list to match several ports or ranges.";
1254
1255my $rule_properties = {
1256 pos => {
1257 description => "Update rule at position <pos>.",
1258 type => 'integer',
1259 minimum => 0,
1260 optional => 1,
1261 },
1262 digest => get_standard_option('pve-config-digest'),
1263 type => {
1264 description => "Rule type.",
1265 type => 'string',
1266 optional => 1,
1267 enum => ['in', 'out', 'group'],
1268 },
1269 action => {
1270 description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1271 type => 'string',
1272 optional => 1,
1273 pattern => $security_group_name_pattern,
1274 maxLength => 20,
1275 minLength => 2,
1276 },
1277 macro => {
1278 description => "Use predefined standard macro.",
1279 type => 'string',
1280 optional => 1,
1281 maxLength => 128,
1282 },
1283 iface => get_standard_option('pve-iface', {
1284 description => "Network interface name. You have to use network configuration key names for VMs and containers ('net\\d+'). Host related rules can use arbitrary strings.",
1285 optional => 1
1286 }),
1287 source => {
1288 description => "Restrict packet source address. $addr_list_descr",
1289 type => 'string', format => 'pve-fw-addr-spec',
1290 optional => 1,
1291 },
1292 dest => {
1293 description => "Restrict packet destination address. $addr_list_descr",
1294 type => 'string', format => 'pve-fw-addr-spec',
1295 optional => 1,
1296 },
1297 proto => {
1298 description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1299 type => 'string', format => 'pve-fw-protocol-spec',
1300 optional => 1,
1301 },
1302 enable => {
1303 description => "Flag to enable/disable a rule.",
1304 type => 'integer',
1305 minimum => 0,
1306 optional => 1,
1307 },
1308 sport => {
1309 description => "Restrict TCP/UDP source port. $port_descr",
1310 type => 'string', format => 'pve-fw-sport-spec',
1311 optional => 1,
1312 },
1313 dport => {
1314 description => "Restrict TCP/UDP destination port. $port_descr",
1315 type => 'string', format => 'pve-fw-dport-spec',
1316 optional => 1,
1317 },
1318 comment => {
1319 description => "Descriptive comment.",
1320 type => 'string',
1321 optional => 1,
1322 },
1323};
1324
1325sub add_rule_properties {
1326 my ($properties) = @_;
1327
1328 foreach my $k (keys %$rule_properties) {
1329 my $h = $rule_properties->{$k};
1330 # copy data, so that we can modify later without side effects
1331 foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1332 }
1333
1334 return $properties;
1335}
1336
1337sub delete_rule_properties {
1338 my ($rule, $delete_str) = @_;
1339
1340 foreach my $opt (PVE::Tools::split_list($delete_str)) {
1341 raise_param_exc({ 'delete' => "no such property ('$opt')"})
1342 if !defined($rule_properties->{$opt});
1343 raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1344 if $opt eq 'type' || $opt eq 'action';
1345 delete $rule->{$opt};
1346 }
1347
1348 return $rule;
1349}
1350
1351my $apply_macro = sub {
1352 my ($macro_name, $param, $verify, $ipversion) = @_;
1353
1354 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1355 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1356
1357 if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1358 $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1359 }
1360
1361 # skip macros which are specific to another ipversion
1362 if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1363 return if $ipversion != $required;
1364 }
1365
1366 my $rules = [];
1367
1368 foreach my $templ (@$macro_rules) {
1369 my $rule = {};
1370 my $param_used = {};
1371 foreach my $k (keys %$templ) {
1372 my $v = $templ->{$k};
1373 if ($v eq 'PARAM') {
1374 $v = $param->{$k};
1375 $param_used->{$k} = 1;
1376 } elsif ($v eq 'DEST') {
1377 $v = $param->{dest};
1378 $param_used->{dest} = 1;
1379 } elsif ($v eq 'SOURCE') {
1380 $v = $param->{source};
1381 $param_used->{source} = 1;
1382 }
1383
1384 if (!defined($v)) {
1385 my $msg = "missing parameter '$k' in macro '$macro_name'";
1386 raise_param_exc({ macro => $msg }) if $verify;
1387 die "$msg\n";
1388 }
1389 $rule->{$k} = $v;
1390 }
1391 foreach my $k (keys %$param) {
1392 next if $k eq 'macro';
1393 next if !defined($param->{$k});
1394 next if $param_used->{$k};
1395 if (defined($rule->{$k})) {
1396 if ($rule->{$k} ne $param->{$k}) {
1397 my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1398 raise_param_exc({ $k => $msg }) if $verify;
1399 die "$msg\n";
1400 }
1401 } else {
1402 $rule->{$k} = $param->{$k};
1403 }
1404 }
1405 push @$rules, $rule;
1406 }
1407
1408 return $rules;
1409};
1410
1411my $rule_env_iface_lookup = {
1412 'ct' => 1,
1413 'vm' => 1,
1414 'group' => 0,
1415 'cluster' => 1,
1416 'host' => 1,
1417};
1418
1419sub verify_rule {
1420 my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1421
1422 my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1423
1424 my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1425 die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1426
1427 my $errors = $rule->{errors} || {};
1428
1429 my $error_count = 0;
1430
1431 my $add_error = sub {
1432 my ($param, $msg) = @_;
1433 chomp $msg;
1434 raise_param_exc({ $param => $msg }) if !$noerr;
1435 $error_count++;
1436 $errors->{$param} = $msg if !$errors->{$param};
1437 };
1438
1439 my $ipversion;
1440 my $set_ip_version = sub {
1441 my $vers = shift;
1442 if ($vers) {
1443 die "detected mixed ipv4/ipv6 adresses in rule\n"
1444 if $ipversion && ($vers != $ipversion);
1445 $ipversion = $vers;
1446 }
1447 };
1448
1449 my $check_ipset_or_alias_property = sub {
1450 my ($name, $expected_ipversion) = @_;
1451
1452 if (my $value = $rule->{$name}) {
1453 if ($value =~ m/^\+/) {
1454 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1455 &$add_error($name, "no such ipset '$1'")
1456 if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1457
1458 } else {
1459 &$add_error($name, "invalid ipset name '$value'");
1460 }
1461 } elsif ($value =~ m/^${ip_alias_pattern}$/){
1462 my $alias = lc($value);
1463 &$add_error($name, "no such alias '$value'")
1464 if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1465 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1466 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1467
1468 &$set_ip_version($e->{ipversion});
1469 }
1470 }
1471 };
1472
1473 my $type = $rule->{type};
1474 my $action = $rule->{action};
1475
1476 &$add_error('type', "missing property") if !$type;
1477 &$add_error('action', "missing property") if !$action;
1478
1479 if ($type) {
1480 if ($type eq 'in' || $type eq 'out') {
1481 &$add_error('action', "unknown action '$action'")
1482 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1483 } elsif ($type eq 'group') {
1484 &$add_error('type', "security groups not allowed")
1485 if !$allow_groups;
1486 &$add_error('action', "invalid characters in security group name")
1487 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1488 } else {
1489 &$add_error('type', "unknown rule type '$type'");
1490 }
1491 }
1492
1493 if ($rule->{iface}) {
1494 &$add_error('type', "parameter -i not allowed for this rule type")
1495 if !$allow_iface;
1496 eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1497 &$add_error('iface', $@) if $@;
1498 if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1499 &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1500 if $rule->{iface} !~ m/^net(\d+)$/;
1501 }
1502 }
1503
1504 if ($rule->{macro}) {
1505 if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1506 $rule->{macro} = $preferred_name;
1507 } else {
1508 &$add_error('macro', "unknown macro '$rule->{macro}'");
1509 }
1510 }
1511
1512 if ($rule->{proto}) {
1513 eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1514 &$add_error('proto', $@) if $@;
1515 &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1516 &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1517 }
1518
1519 if ($rule->{dport}) {
1520 eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1521 &$add_error('dport', $@) if $@;
1522 my $proto = $rule->{proto};
1523 &$add_error('proto', "missing property - 'dport' requires this property")
1524 if !$proto;
1525 &$add_error('dport', "protocol '$proto' does not support ports")
1526 if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1527 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1528 }
1529
1530 if ($rule->{sport}) {
1531 eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1532 &$add_error('sport', $@) if $@;
1533 my $proto = $rule->{proto};
1534 &$add_error('proto', "missing property - 'sport' requires this property")
1535 if !$proto;
1536 &$add_error('sport', "protocol '$proto' does not support ports")
1537 if !$PROTOCOLS_WITH_PORTS->{$proto};
1538 }
1539
1540 if ($rule->{source}) {
1541 eval {
1542 my $source_ipversion = parse_address_list($rule->{source});
1543 &$set_ip_version($source_ipversion);
1544 };
1545 &$add_error('source', $@) if $@;
1546 &$check_ipset_or_alias_property('source', $ipversion);
1547 }
1548
1549 if ($rule->{dest}) {
1550 eval {
1551 my $dest_ipversion = parse_address_list($rule->{dest});
1552 &$set_ip_version($dest_ipversion);
1553 };
1554 &$add_error('dest', $@) if $@;
1555 &$check_ipset_or_alias_property('dest', $ipversion);
1556 }
1557
1558 $rule->{ipversion} = $ipversion if $ipversion;
1559
1560 if ($rule->{macro} && !$error_count) {
1561 eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1562 if (my $err = $@) {
1563 if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1564 my $eh = $err->{errors};
1565 foreach my $p (keys %$eh) {
1566 &$add_error($p, $eh->{$p});
1567 }
1568 } else {
1569 &$add_error('macro', "$err");
1570 }
1571 }
1572 }
1573
1574 $rule->{errors} = $errors if $error_count;
1575
1576 return $rule;
1577}
1578
1579sub copy_rule_data {
1580 my ($rule, $param) = @_;
1581
1582 foreach my $k (keys %$rule_properties) {
1583 if (defined(my $v = $param->{$k})) {
1584 if ($v eq '' || $v eq '-') {
1585 delete $rule->{$k};
1586 } else {
1587 $rule->{$k} = $v;
1588 }
1589 }
1590 }
1591
1592 return $rule;
1593}
1594
1595sub rules_modify_permissions {
1596 my ($rule_env) = @_;
1597
1598 if ($rule_env eq 'host') {
1599 return {
1600 check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1601 };
1602 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1603 return {
1604 check => ['perm', '/', [ 'Sys.Modify' ]],
1605 };
1606 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1607 return {
1608 check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1609 }
1610 }
1611
1612 return undef;
1613}
1614
1615sub rules_audit_permissions {
1616 my ($rule_env) = @_;
1617
1618 if ($rule_env eq 'host') {
1619 return {
1620 check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1621 };
1622 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1623 return {
1624 check => ['perm', '/', [ 'Sys.Audit' ]],
1625 };
1626 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1627 return {
1628 check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1629 }
1630 }
1631
1632 return undef;
1633}
1634
1635# core functions
1636my $bridge_firewall_enabled = 0;
1637
1638sub enable_bridge_firewall {
1639
1640 return if $bridge_firewall_enabled; # only once
1641
1642 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1643 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1644
1645 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1646 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1647
1648 $bridge_firewall_enabled = 1;
1649}
1650
1651sub iptables_restore_cmdlist {
1652 my ($cmdlist) = @_;
1653
1654 run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1655}
1656
1657sub ip6tables_restore_cmdlist {
1658 my ($cmdlist) = @_;
1659
1660 run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1661}
1662
1663sub ipset_restore_cmdlist {
1664 my ($cmdlist) = @_;
1665
1666 run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1667}
1668
1669sub iptables_get_chains {
1670 my ($iptablescmd) = @_;
1671
1672 $iptablescmd = "iptables" if !$iptablescmd;
1673
1674 my $res = {};
1675
1676 # check what chains we want to track
1677 my $is_pvefw_chain = sub {
1678 my $name = shift;
1679
1680 return 1 if $name =~ m/^PVEFW-\S+$/;
1681
1682 return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1683
1684 return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1685
1686 return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1687 return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1688
1689 return undef;
1690 };
1691
1692 my $table = '';
1693
1694 my $hooks = {};
1695
1696 my $parser = sub {
1697 my $line = shift;
1698
1699 return if $line =~ m/^#/;
1700 return if $line =~ m/^\s*$/;
1701
1702 if ($line =~ m/^\*(\S+)$/) {
1703 $table = $1;
1704 return;
1705 }
1706
1707 return if $table ne 'filter';
1708
1709 if ($line =~ m/^:(\S+)\s/) {
1710 my $chain = $1;
1711 return if !&$is_pvefw_chain($chain);
1712 $res->{$chain} = "unknown";
1713 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1714 my ($chain, $sig) = ($1, $2);
1715 return if !&$is_pvefw_chain($chain);
1716 $res->{$chain} = $sig;
1717 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1718 $hooks->{$1} = 1;
1719 } else {
1720 # simply ignore the rest
1721 return;
1722 }
1723 };
1724
1725 run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1726
1727 return wantarray ? ($res, $hooks) : $res;
1728}
1729
1730sub iptables_chain_digest {
1731 my ($rules) = @_;
1732 my $digest = Digest::SHA->new('sha1');
1733 foreach my $rule (@$rules) { # order is important
1734 $digest->add($rule);
1735 }
1736 return $digest->b64digest;
1737}
1738
1739sub ipset_chain_digest {
1740 my ($rules) = @_;
1741
1742 my $digest = Digest::SHA->new('sha1');
1743 foreach my $rule (sort @$rules) { # note: sorted
1744 $digest->add($rule);
1745 }
1746 return $digest->b64digest;
1747}
1748
1749sub ipset_get_chains {
1750
1751 my $res = {};
1752 my $chains = {};
1753
1754 my $parser = sub {
1755 my $line = shift;
1756
1757 return if $line =~ m/^#/;
1758 return if $line =~ m/^\s*$/;
1759 if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1760 my $chain = $1;
1761 $line =~ s/\s+$//; # delete trailing white space
1762 push @{$chains->{$chain}}, $line;
1763 } else {
1764 # simply ignore the rest
1765 return;
1766 }
1767 };
1768
1769 run_command("/sbin/ipset save", outfunc => $parser);
1770
1771 # compute digest for each chain
1772 foreach my $chain (keys %$chains) {
1773 $res->{$chain} = ipset_chain_digest($chains->{$chain});
1774 }
1775
1776 return $res;
1777}
1778
1779sub ruleset_generate_match {
1780 my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1781
1782 return if defined($rule->{enable}) && !$rule->{enable};
1783 return if $rule->{errors};
1784
1785 die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1786
1787 my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}, 1) : 0;
1788 my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}, 0) : 0;
1789
1790 my @cmd = ();
1791
1792 push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1793 push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1794
1795 my $source = $rule->{source};
1796 my $dest = $rule->{dest};
1797
1798 if ($source) {
1799 if ($source =~ m/^\+/) {
1800 if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1801 my $name = $1;
1802 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1803 my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1804 push @cmd, "-m set --match-set ${ipset_chain} src";
1805 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1806 my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1807 push @cmd, "-m set --match-set ${ipset_chain} src";
1808 } else {
1809 die "no such ipset '$name'\n";
1810 }
1811 } else {
1812 die "invalid security group name '$source'\n";
1813 }
1814 } elsif ($source =~ m/^${ip_alias_pattern}$/){
1815 my $alias = lc($source);
1816 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1817 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1818 die "no such alias '$source'\n" if !$e;
1819 push @cmd, "-s $e->{cidr}";
1820 } elsif ($source =~ m/\-/){
1821 push @cmd, "-m iprange --src-range $source";
1822 } else {
1823 push @cmd, "-s $source";
1824 }
1825 }
1826
1827 if ($dest) {
1828 if ($dest =~ m/^\+/) {
1829 if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1830 my $name = $1;
1831 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1832 my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1833 push @cmd, "-m set --match-set ${ipset_chain} dst";
1834 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1835 my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1836 push @cmd, "-m set --match-set ${ipset_chain} dst";
1837 } else {
1838 die "no such ipset '$name'\n";
1839 }
1840 } else {
1841 die "invalid security group name '$dest'\n";
1842 }
1843 } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1844 my $alias = lc($dest);
1845 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1846 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1847 die "no such alias '$dest'\n" if !$e;
1848 push @cmd, "-d $e->{cidr}";
1849 } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1850 push @cmd, "-m iprange --dst-range $dest";
1851 } else {
1852 push @cmd, "-d $dest";
1853 }
1854 }
1855
1856 if (my $proto = $rule->{proto}) {
1857 push @cmd, "-p $proto";
1858
1859 my $multiport = 0;
1860 $multiport++ if $nbdport > 1;
1861 $multiport++ if $nbsport > 1;
1862
1863 push @cmd, "--match multiport" if $multiport;
1864
1865 die "multiport: option '--sports' cannot be used together with '--dports'\n"
1866 if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1867
1868 if ($rule->{dport}) {
1869 if ($proto eq 'icmp') {
1870 # Note: we use dport to store --icmp-type
1871 die "unknown icmp-type '$rule->{dport}'\n"
1872 if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
1873 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1874 } elsif ($proto eq 'icmpv6') {
1875 # Note: we use dport to store --icmpv6-type
1876 die "unknown icmpv6-type '$rule->{dport}'\n"
1877 if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
1878 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1879 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
1880 die "protocol $proto does not have ports\n";
1881 } else {
1882 if ($nbdport > 1) {
1883 if ($multiport == 2) {
1884 push @cmd, "--ports $rule->{dport}";
1885 } else {
1886 push @cmd, "--dports $rule->{dport}";
1887 }
1888 } else {
1889 push @cmd, "--dport $rule->{dport}";
1890 }
1891 }
1892 }
1893
1894 if ($rule->{sport}) {
1895 die "protocol $proto does not have ports\n"
1896 if !$PROTOCOLS_WITH_PORTS->{$proto};
1897 if ($nbsport > 1) {
1898 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1899 } else {
1900 push @cmd, "--sport $rule->{sport}";
1901 }
1902 }
1903 } elsif ($rule->{dport} || $rule->{sport}) {
1904 die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1905 die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1906 }
1907
1908 push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1909
1910 return scalar(@cmd) ? join(' ', @cmd) : undef;
1911}
1912
1913sub ruleset_generate_action {
1914 my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1915
1916 my @cmd = ();
1917
1918 if (my $action = $rule->{action}) {
1919 $action = $actions->{$action} if defined($actions->{$action});
1920 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1921 push @cmd, $goto ? "-g $action" : "-j $action";
1922 }
1923
1924 return scalar(@cmd) ? join(' ', @cmd) : undef;
1925}
1926
1927sub ruleset_generate_cmdstr {
1928 my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1929 my $match = ruleset_generate_match($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf);
1930 my $action = ruleset_generate_action($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf);
1931
1932 return undef if !(defined($match) or defined($action));
1933 my $ret = defined($match) ? $match : "";
1934 $ret = "$ret $action" if defined($action);
1935 return $ret;
1936}
1937
1938sub ruleset_generate_rule {
1939 my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1940
1941 my $rules;
1942
1943 if ($rule->{macro}) {
1944 $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
1945 } else {
1946 $rules = [ $rule ];
1947 }
1948
1949 # update all or nothing
1950
1951 my @mstrs = ();
1952 my @astrs = ();
1953 foreach my $tmp (@$rules) {
1954 my $m = ruleset_generate_match($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf);
1955 my $a = ruleset_generate_action($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf);
1956 if (defined $m or defined $a) {
1957 push @mstrs, defined($m) ? $m : "";
1958 push @astrs, defined($a) ? $a : "";
1959 }
1960 }
1961
1962 for my $i (0 .. $#mstrs) {
1963 ruleset_addrule($ruleset, $chain, $mstrs[$i], $astrs[$i]);
1964 }
1965}
1966
1967sub ruleset_generate_rule_insert {
1968 my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
1969
1970 die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1971
1972 my $match = ruleset_generate_match($ruleset, $chain, $ipversion, $rule, $actions, $goto);
1973 my $action = ruleset_generate_action($ruleset, $chain, $ipversion, $rule, $actions, $goto);
1974 if (defined $match && defined $action) {
1975 ruleset_insertrule($ruleset, $chain, $match, $action);
1976 }
1977}
1978
1979sub ruleset_create_chain {
1980 my ($ruleset, $chain) = @_;
1981
1982 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1983 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1984
1985 die "chain '$chain' already exists\n" if $ruleset->{$chain};
1986
1987 $ruleset->{$chain} = [];
1988}
1989
1990sub ruleset_chain_exist {
1991 my ($ruleset, $chain) = @_;
1992
1993 return $ruleset->{$chain} ? 1 : undef;
1994}
1995
1996sub ruleset_addrule_old {
1997 my ($ruleset, $chain, $rule) = @_;
1998
1999 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2000
2001 push @{$ruleset->{$chain}}, "-A $chain $rule";
2002}
2003
2004sub ruleset_addrule {
2005 my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
2006
2007 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2008
2009 if (defined($log) && $log) {
2010 my $logaction = get_log_rule_base($chain, $vmid, $logmsg, $log);
2011 push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
2012 }
2013 push @{$ruleset->{$chain}}, "-A $chain $match $action";
2014}
2015
2016sub ruleset_insertrule {
2017 my ($ruleset, $chain, $match, $action, $log) = @_;
2018
2019 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2020
2021 unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2022}
2023
2024sub get_log_rule_base {
2025 my ($chain, $vmid, $msg, $loglevel) = @_;
2026
2027 $vmid = 0 if !defined($vmid);
2028 $msg = "" if !defined($msg);
2029
2030 # Note: we use special format for prefix to pass further
2031 # info to log daemon (VMID, LOGLEVEL and CHAIN)
2032
2033 return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2034}
2035
2036sub ruleset_add_chain_policy {
2037 my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2038
2039 if ($policy eq 'ACCEPT') {
2040
2041 ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
2042 { ACCEPT => $accept_action});
2043
2044 } elsif ($policy eq 'DROP') {
2045
2046 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop");
2047
2048 ruleset_addrule($ruleset, $chain, "", "-j DROP", $loglevel, "policy $policy: ", $vmid);
2049 } elsif ($policy eq 'REJECT') {
2050 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject");
2051
2052 ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject", $loglevel, "policy $policy:", $vmid);
2053 } else {
2054 # should not happen
2055 die "internal error: unknown policy '$policy'";
2056 }
2057}
2058
2059sub ruleset_chain_add_ndp {
2060 my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2061 return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2062
2063 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation", $accept);
2064 if ($direction ne 'OUT' || $options->{radv}) {
2065 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", $accept);
2066 }
2067 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation", $accept);
2068 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement", $accept);
2069}
2070
2071sub ruleset_chain_add_conn_filters {
2072 my ($ruleset, $chain, $accept) = @_;
2073
2074 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID", "-j DROP");
2075 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED", "-j $accept");
2076}
2077
2078sub ruleset_chain_add_input_filters {
2079 my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2080
2081 if ($cluster_conf->{ipset}->{blacklist}){
2082 if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2083 ruleset_create_chain($ruleset, "PVEFW-blacklist");
2084 ruleset_addrule($ruleset, "PVEFW-blacklist", "", "-j DROP", $loglevel, "DROP: ");
2085 }
2086 my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2087 ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src", "-j PVEFW-blacklist");
2088 }
2089
2090 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2091 if ($ipversion == 4) {
2092 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW", "-j PVEFW-smurfs");
2093 }
2094 }
2095
2096 if ($options->{tcpflags}) {
2097 ruleset_addrule($ruleset, $chain, "-p tcp", "-j PVEFW-tcpflags");
2098 }
2099}
2100
2101sub ruleset_create_vm_chain {
2102 my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2103
2104 ruleset_create_chain($ruleset, $chain);
2105 my $accept = generate_nfqueue($options);
2106
2107 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2108 if ($ipversion == 4) {
2109 if ($direction eq 'OUT') {
2110 ruleset_generate_rule($ruleset, $chain, $ipversion,
2111 { action => 'PVEFW-SET-ACCEPT-MARK',
2112 proto => 'udp', sport => 68, dport => 67 });
2113 } else {
2114 ruleset_generate_rule($ruleset, $chain, $ipversion,
2115 { action => 'ACCEPT',
2116 proto => 'udp', sport => 67, dport => 68 });
2117 }
2118 } elsif ($ipversion == 6) {
2119 if ($direction eq 'OUT') {
2120 ruleset_generate_rule($ruleset, $chain, $ipversion,
2121 { action => 'PVEFW-SET-ACCEPT-MARK',
2122 proto => 'udp', sport => 546, dport => 547 });
2123 } else {
2124 ruleset_generate_rule($ruleset, $chain, $ipversion,
2125 { action => 'ACCEPT',
2126 proto => 'udp', sport => 547, dport => 546 });
2127 }
2128 }
2129
2130 }
2131
2132 if ($direction eq 'OUT') {
2133 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2134 ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr", "-j DROP");
2135 }
2136 if ($ipversion == 6 && !$options->{radv}) {
2137 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", "-j DROP");
2138 }
2139 if ($ipfilter_ipset) {
2140 ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src", "-j DROP");
2141 }
2142 ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2143 }
2144
2145 my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2146 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2147}
2148
2149sub ruleset_add_group_rule {
2150 my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2151
2152 my $group = $rule->{action};
2153 my $group_chain = "GROUP-$group-$direction";
2154 if(!ruleset_chain_exist($ruleset, $group_chain)){
2155 generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2156 }
2157
2158 if ($direction eq 'OUT' && $rule->{iface_out}) {
2159 ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out}", "-j $group_chain");
2160 } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2161 ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in}", "-j $group_chain");
2162 } else {
2163 ruleset_addrule($ruleset, $chain, "", "-j $group_chain");
2164 }
2165
2166 ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON", "-j $action");
2167}
2168
2169sub ruleset_generate_vm_rules {
2170 my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
2171
2172 my $lc_direction = lc($direction);
2173
2174 my $in_accept = generate_nfqueue($options);
2175
2176 foreach my $rule (@$rules) {
2177 next if $rule->{iface} && $rule->{iface} ne $netid;
2178 next if !$rule->{enable} || $rule->{errors};
2179 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2180
2181 if ($rule->{type} eq 'group') {
2182 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2183 $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2184 } else {
2185 next if $rule->{type} ne $lc_direction;
2186 eval {
2187 if ($direction eq 'OUT') {
2188 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2189 { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2190 undef, $cluster_conf, $vmfw_conf);
2191 } else {
2192 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2193 { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
2194 undef, $cluster_conf, $vmfw_conf);
2195 }
2196 };
2197 warn $@ if $@;
2198 }
2199 }
2200}
2201
2202sub generate_nfqueue {
2203 my ($options) = @_;
2204
2205 if ($options->{ips}) {
2206 my $action = "NFQUEUE";
2207 if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2208 if (defined($3) && defined($1)) {
2209 $action .= " --queue-balance $1:$3";
2210 } elsif (defined($1)) {
2211 $action .= " --queue-num $1";
2212 }
2213 }
2214 $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2215 return $action;
2216 } else {
2217 return "ACCEPT";
2218 }
2219}
2220
2221sub ruleset_generate_vm_ipsrules {
2222 my ($ruleset, $options, $direction, $iface) = @_;
2223
2224 if ($options->{ips} && $direction eq 'IN') {
2225 my $nfqueue = generate_nfqueue($options);
2226
2227 if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2228 ruleset_create_chain($ruleset, "PVEFW-IPS");
2229 }
2230
2231 ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged", "-j $nfqueue");
2232 }
2233}
2234
2235sub generate_tap_rules_direction {
2236 my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2237
2238 my $lc_direction = lc($direction);
2239
2240 my $rules = $vmfw_conf->{rules};
2241
2242 my $options = $vmfw_conf->{options};
2243 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2244
2245 my $tapchain = "$iface-$direction";
2246
2247 my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2248 my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2249 if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2250
2251 # create chain with mac and ip filter
2252 ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2253
2254 if ($options->{enable}) {
2255 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2256
2257 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2258
2259 # implement policy
2260 my $policy;
2261
2262 if ($direction eq 'OUT') {
2263 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2264 } else {
2265 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2266 }
2267
2268 my $accept = generate_nfqueue($options);
2269 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2270 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2271 } else {
2272 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2273 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2274 }
2275
2276 # plug the tap chain to bridge chain
2277 if ($direction eq 'IN') {
2278 ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2279 "-m physdev --physdev-is-bridged --physdev-out $iface", "-j $tapchain");
2280 } else {
2281 ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2282 "-m physdev --physdev-is-bridged --physdev-in $iface", "-j $tapchain");
2283 }
2284}
2285
2286sub enable_host_firewall {
2287 my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2288
2289 my $options = $hostfw_conf->{options};
2290 my $cluster_options = $cluster_conf->{options};
2291 my $rules = $hostfw_conf->{rules};
2292 my $cluster_rules = $cluster_conf->{rules};
2293
2294 # host inbound firewall
2295 my $chain = "PVEFW-HOST-IN";
2296 ruleset_create_chain($ruleset, $chain);
2297
2298 my $loglevel = get_option_log_level($options, "log_level_in");
2299
2300 ruleset_addrule($ruleset, $chain, "-i lo", "-j ACCEPT");
2301
2302 ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2303 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2304 ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2305
2306 # we use RETURN because we need to check also tap rules
2307 my $accept_action = 'RETURN';
2308
2309 ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2310
2311 # add host rules first, so that cluster wide rules can be overwritten
2312 foreach my $rule (@$rules, @$cluster_rules) {
2313 next if !$rule->{enable} || $rule->{errors};
2314 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2315
2316 $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2317
2318 eval {
2319 if ($rule->{type} eq 'group') {
2320 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2321 } elsif ($rule->{type} eq 'in') {
2322 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2323 { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2324 undef, $cluster_conf, $hostfw_conf);
2325 }
2326 };
2327 warn $@ if $@;
2328 delete $rule->{iface_in};
2329 }
2330
2331 # allow standard traffic for management ipset (includes cluster network)
2332 my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2333 my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2334 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006", "-j $accept_action"); # PVE API
2335 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999", "-j $accept_action"); # PVE VNC Console
2336 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128", "-j $accept_action"); # SPICE Proxy
2337 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22", "-j $accept_action"); # SSH
2338
2339 my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2340 my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2341
2342 # corosync
2343 if ($localnet && ($ipversion == $localnet_ver)) {
2344 my $corosync_rule = "-p udp --dport 5404:5405";
2345 ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule", "-j $accept_action");
2346 ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
2347 }
2348
2349 # implement input policy
2350 my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2351 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2352
2353 # host outbound firewall
2354 $chain = "PVEFW-HOST-OUT";
2355 ruleset_create_chain($ruleset, $chain);
2356
2357 $loglevel = get_option_log_level($options, "log_level_out");
2358
2359 ruleset_addrule($ruleset, $chain, "-o lo", "-j ACCEPT");
2360
2361 ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2362
2363 # we use RETURN because we may want to check other thigs later
2364 $accept_action = 'RETURN';
2365 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2366
2367 ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2368
2369 # add host rules first, so that cluster wide rules can be overwritten
2370 foreach my $rule (@$rules, @$cluster_rules) {
2371 next if !$rule->{enable} || $rule->{errors};
2372 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2373
2374 $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2375 eval {
2376 if ($rule->{type} eq 'group') {
2377 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2378 } elsif ($rule->{type} eq 'out') {
2379 ruleset_generate_rule($ruleset, $chain, $ipversion,
2380 $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2381 undef, $cluster_conf, $hostfw_conf);
2382 }
2383 };
2384 warn $@ if $@;
2385 delete $rule->{iface_out};
2386 }
2387
2388 # allow standard traffic on cluster network
2389 if ($localnet && ($ipversion == $localnet_ver)) {
2390 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006", "-j $accept_action"); # PVE API
2391 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22", "-j $accept_action"); # SSH
2392 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999", "-j $accept_action"); # PVE VNC Console
2393 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128", "-j $accept_action"); # SPICE Proxy
2394
2395 my $corosync_rule = "-p udp --dport 5404:5405";
2396 ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule", "-j $accept_action");
2397 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
2398 }
2399
2400 # implement output policy
2401 $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2402 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2403
2404 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "", "-j PVEFW-HOST-OUT");
2405 ruleset_addrule($ruleset, "PVEFW-INPUT", "", "-j PVEFW-HOST-IN");
2406}
2407
2408sub generate_group_rules {
2409 my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2410
2411 my $rules = $cluster_conf->{groups}->{$group};
2412
2413 if (!$rules) {
2414 warn "no such security group '$group'\n";
2415 $rules = []; # create empty chain
2416 }
2417
2418 my $chain = "GROUP-${group}-IN";
2419
2420 ruleset_create_chain($ruleset, $chain);
2421 ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2422
2423 foreach my $rule (@$rules) {
2424 next if $rule->{type} ne 'in';
2425 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2426 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2427 { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2428 undef, $cluster_conf);
2429 }
2430
2431 $chain = "GROUP-${group}-OUT";
2432
2433 ruleset_create_chain($ruleset, $chain);
2434 ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2435
2436 foreach my $rule (@$rules) {
2437 next if $rule->{type} ne 'out';
2438 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2439 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2440 # check also other tap rules later
2441 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2442 { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2443 undef, $cluster_conf);
2444 }
2445}
2446
2447my $MAX_NETS = 32;
2448my $valid_netdev_names = {};
2449for (my $i = 0; $i < $MAX_NETS; $i++) {
2450 $valid_netdev_names->{"net$i"} = 1;
2451}
2452
2453sub get_mark_values {
2454 my ($value, $mask) = @_;
2455 $value = hex($value) if $value =~ /^0x/;
2456 $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2457 $mask = 0xffffffff if !defined($mask);
2458 return ($value, $mask);
2459}
2460
2461sub parse_fw_rule {
2462 my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2463
2464 my $orig_line = $line;
2465
2466 my $rule = {};
2467
2468 # we can add single line comments to the end of the rule
2469 if ($line =~ s/#\s*(.*?)\s*$//) {
2470 $rule->{comment} = decode('utf8', $1);
2471 }
2472
2473 # we can disable a rule when prefixed with '|'
2474
2475 $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2476
2477 $line =~ s/^(\S+)\s+(\S+)\s*// ||
2478 die "unable to parse rule: $line\n";
2479
2480 $rule->{type} = lc($1);
2481 $rule->{action} = $2;
2482
2483 if ($rule->{type} eq 'in' || $rule->{type} eq 'out') {
2484 if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2485 $rule->{macro} = $1;
2486 $rule->{action} = $2;
2487 }
2488 }
2489
2490 while (length($line)) {
2491 if ($line =~ s/^-i (\S+)\s*//) {
2492 $rule->{iface} = $1;
2493 next;
2494 }
2495
2496 last if $rule->{type} eq 'group';
2497
2498 if ($line =~ s/^-p (\S+)\s*//) {
2499 $rule->{proto} = $1;
2500 next;
2501 }
2502
2503 if ($line =~ s/^-dport (\S+)\s*//) {
2504 $rule->{dport} = $1;
2505 next;
2506 }
2507
2508 if ($line =~ s/^-sport (\S+)\s*//) {
2509 $rule->{sport} = $1;
2510 next;
2511 }
2512 if ($line =~ s/^-source (\S+)\s*//) {
2513 $rule->{source} = $1;
2514 next;
2515 }
2516 if ($line =~ s/^-dest (\S+)\s*//) {
2517 $rule->{dest} = $1;
2518 next;
2519 }
2520
2521 last;
2522 }
2523
2524 die "unable to parse rule parameters: $line\n" if length($line);
2525
2526 $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2527 if ($rule->{errors}) {
2528 # The verbose flag really means we're running from the CLI and want
2529 # output on the console - in the other case we really want such errors
2530 # to go into the syslog instead.
2531 my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2532 $log->("$prefix - errors in rule parameters: $orig_line\n");
2533 foreach my $p (keys %{$rule->{errors}}) {
2534 $log->(" $p: $rule->{errors}->{$p}\n");
2535 }
2536 }
2537
2538 return $rule;
2539}
2540
2541sub parse_vmfw_option {
2542 my ($line) = @_;
2543
2544 my ($opt, $value);
2545
2546 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2547
2548 if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2549 $opt = lc($1);
2550 $value = int($2);
2551 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2552 $opt = lc($1);
2553 $value = $2 ? lc($3) : '';
2554 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2555 $opt = lc($1);
2556 $value = uc($3);
2557 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2558 $opt = lc($1);
2559 $value = $2;
2560 } else {
2561 die "can't parse option '$line'\n"
2562 }
2563
2564 return ($opt, $value);
2565}
2566
2567sub parse_hostfw_option {
2568 my ($line) = @_;
2569
2570 my ($opt, $value);
2571
2572 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2573
2574 if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
2575 $opt = lc($1);
2576 $value = int($2);
2577 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2578 $opt = lc($1);
2579 $value = $2 ? lc($3) : '';
2580 } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2581 $opt = lc($1);
2582 $value = int($2);
2583 } else {
2584 die "can't parse option '$line'\n"
2585 }
2586
2587 return ($opt, $value);
2588}
2589
2590sub parse_clusterfw_option {
2591 my ($line) = @_;
2592
2593 my ($opt, $value);
2594
2595 if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2596 $opt = lc($1);
2597 $value = int($2);
2598 if (($value > 1) && ((time() - $value) > 60)) {
2599 $value = 0
2600 }
2601 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2602 $opt = lc($1);
2603 $value = uc($3);
2604 } else {
2605 die "can't parse option '$line'\n"
2606 }
2607
2608 return ($opt, $value);
2609}
2610
2611sub resolve_alias {
2612 my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2613
2614 my $alias = lc($cidr);
2615 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2616 $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2617
2618 die "no such alias '$cidr'\n" if !$e;;
2619
2620 return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2621}
2622
2623sub parse_ip_or_cidr {
2624 my ($cidr) = @_;
2625
2626 my $ipversion;
2627
2628 if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2629 $cidr =~ s|/128$||;
2630 $ipversion = 6;
2631 } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2632 $cidr =~ s|/32$||;
2633 $ipversion = 4;
2634 } else {
2635 die "value does not look like a valid IP address or CIDR network\n";
2636 }
2637
2638 return wantarray ? ($cidr, $ipversion) : $cidr;
2639}
2640
2641sub parse_alias {
2642 my ($line) = @_;
2643
2644 # we can add single line comments to the end of the line
2645 my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2646
2647 if ($line =~ m/^(\S+)\s(\S+)$/) {
2648 my ($name, $cidr) = ($1, $2);
2649 my $ipversion;
2650
2651 ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2652
2653 my $data = {
2654 name => $name,
2655 cidr => $cidr,
2656 ipversion => $ipversion,
2657 };
2658 $data->{comment} = $comment if $comment;
2659 return $data;
2660 }
2661
2662 return undef;
2663}
2664
2665sub generic_fw_config_parser {
2666 my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2667
2668 my $section;
2669 my $group;
2670
2671 my $res = $empty_conf;
2672
2673 while (defined(my $line = <$fh>)) {
2674 next if $line =~ m/^#/;
2675 next if $line =~ m/^\s*$/;
2676
2677 chomp $line;
2678
2679 my $linenr = $fh->input_line_number();
2680 my $prefix = "$filename (line $linenr)";
2681
2682 if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2683 $section = 'options';
2684 next;
2685 }
2686
2687 if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2688 $section = 'aliases';
2689 next;
2690 }
2691
2692 if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2693 $section = 'groups';
2694 $group = lc($1);
2695 my $comment = $2;
2696 eval {
2697 die "security group name too long\n" if length($group) > $max_group_name_length;
2698 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2699 };
2700 if (my $err = $@) {
2701 ($section, $group, $comment) = undef;
2702 warn "$prefix: $err";
2703 next;
2704 }
2705
2706 $res->{$section}->{$group} = [];
2707 $res->{group_comments}->{$group} = decode('utf8', $comment)
2708 if $comment;
2709 next;
2710 }
2711
2712 if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2713 $section = 'rules';
2714 next;
2715 }
2716
2717 if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2718 $section = 'ipset';
2719 $group = lc($1);
2720 my $comment = $2;
2721 eval {
2722 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2723 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2724 };
2725 if (my $err = $@) {
2726 ($section, $group, $comment) = undef;
2727 warn "$prefix: $err";
2728 next;
2729 }
2730
2731 $res->{$section}->{$group} = [];
2732 $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2733 if $comment;
2734 next;
2735 }
2736
2737 if (!$section) {
2738 warn "$prefix: skip line - no section\n";
2739 next;
2740 }
2741
2742 if ($section eq 'options') {
2743 eval {
2744 my ($opt, $value);
2745 if ($rule_env eq 'cluster') {
2746 ($opt, $value) = parse_clusterfw_option($line);
2747 } elsif ($rule_env eq 'host') {
2748 ($opt, $value) = parse_hostfw_option($line);
2749 } else {
2750 ($opt, $value) = parse_vmfw_option($line);
2751 }
2752 $res->{options}->{$opt} = $value;
2753 };
2754 warn "$prefix: $@" if $@;
2755 } elsif ($section eq 'aliases') {
2756 eval {
2757 my $data = parse_alias($line);
2758 $res->{aliases}->{lc($data->{name})} = $data;
2759 };
2760 warn "$prefix: $@" if $@;
2761 } elsif ($section eq 'rules') {
2762 my $rule;
2763 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2764 if (my $err = $@) {
2765 warn "$prefix: $err";
2766 next;
2767 }
2768 push @{$res->{$section}}, $rule;
2769 } elsif ($section eq 'groups') {
2770 my $rule;
2771 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2772 if (my $err = $@) {
2773 warn "$prefix: $err";
2774 next;
2775 }
2776 push @{$res->{$section}->{$group}}, $rule;
2777 } elsif ($section eq 'ipset') {
2778 # we can add single line comments to the end of the rule
2779 my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2780
2781 $line =~ m/^(\!)?\s*(\S+)\s*$/;
2782 my $nomatch = $1;
2783 my $cidr = $2;
2784 my $errors;
2785
2786 if ($nomatch && !$feature_ipset_nomatch) {
2787 $errors->{nomatch} = "nomatch not supported by kernel";
2788 }
2789
2790 eval {
2791 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2792 resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2793 } else {
2794 $cidr = parse_ip_or_cidr($cidr);
2795 }
2796 };
2797 if (my $err = $@) {
2798 chomp $err;
2799 $errors->{cidr} = $err;
2800 }
2801
2802 if ($cidr =~ m!/0+$!) {
2803 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
2804 }
2805
2806 my $entry = { cidr => $cidr };
2807 $entry->{nomatch} = 1 if $nomatch;
2808 $entry->{comment} = $comment if $comment;
2809 $entry->{errors} = $errors if $errors;
2810
2811 if ($verbose && $errors) {
2812 warn "$prefix - errors in ipset '$group': $line\n";
2813 foreach my $p (keys %{$errors}) {
2814 warn " $p: $errors->{$p}\n";
2815 }
2816 }
2817
2818 push @{$res->{$section}->{$group}}, $entry;
2819 } else {
2820 warn "$prefix: skip line - unknown section\n";
2821 next;
2822 }
2823 }
2824
2825 return $res;
2826}
2827
2828sub parse_hostfw_config {
2829 my ($filename, $fh, $cluster_conf, $verbose) = @_;
2830
2831 my $empty_conf = { rules => [], options => {}};
2832
2833 return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2834}
2835
2836sub parse_vmfw_config {
2837 my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2838
2839 my $empty_conf = {
2840 rules => [],
2841 options => {},
2842 aliases => {},
2843 ipset => {} ,
2844 ipset_comments => {},
2845 };
2846
2847 return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2848}
2849
2850sub parse_clusterfw_config {
2851 my ($filename, $fh, $verbose) = @_;
2852
2853 my $section;
2854 my $group;
2855
2856 my $empty_conf = {
2857 rules => [],
2858 options => {},
2859 aliases => {},
2860 groups => {},
2861 group_comments => {},
2862 ipset => {} ,
2863 ipset_comments => {},
2864 };
2865
2866 return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2867}
2868
2869sub run_locked {
2870 my ($code, @param) = @_;
2871
2872 my $timeout = 10;
2873
2874 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2875
2876 die $@ if $@;
2877
2878 return $res;
2879}
2880
2881sub read_local_vm_config {
2882
2883 my $qemu = {};
2884 my $lxc = {};
2885
2886 my $vmdata = { qemu => $qemu, lxc => $lxc };
2887
2888 my $vmlist = PVE::Cluster::get_vmlist();
2889 return $vmdata if !$vmlist || !$vmlist->{ids};
2890 my $ids = $vmlist->{ids};
2891
2892 foreach my $vmid (keys %$ids) {
2893 next if !$vmid; # skip VE0
2894 my $d = $ids->{$vmid};
2895 next if !$d->{node} || $d->{node} ne $nodename;
2896 next if !$d->{type};
2897 if ($d->{type} eq 'qemu') {
2898 if ($have_qemu_server) {
2899 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
2900 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2901 $qemu->{$vmid} = $conf;
2902 }
2903 }
2904 } elsif ($d->{type} eq 'lxc') {
2905 if ($have_lxc) {
2906 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
2907 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2908 $lxc->{$vmid} = $conf;
2909 }
2910 }
2911 }
2912 }
2913
2914 return $vmdata;
2915};
2916
2917sub load_vmfw_conf {
2918 my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2919
2920 my $vmfw_conf = {};
2921
2922 $dir = $pvefw_conf_dir if !defined($dir);
2923
2924 my $filename = "$dir/$vmid.fw";
2925 if (my $fh = IO::File->new($filename, O_RDONLY)) {
2926 $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2927 $vmfw_conf->{vmid} = $vmid;
2928 }
2929
2930 return $vmfw_conf;
2931}
2932
2933my $format_rules = sub {
2934 my ($rules, $allow_iface) = @_;
2935
2936 my $raw = '';
2937
2938 foreach my $rule (@$rules) {
2939 if ($rule->{type} eq 'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2940 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2941 $raw .= uc($rule->{type});
2942 if ($rule->{macro}) {
2943 $raw .= " $rule->{macro}($rule->{action})";
2944 } else {
2945 $raw .= " " . $rule->{action};
2946 }
2947 if ($allow_iface && $rule->{iface}) {
2948 $raw .= " -i $rule->{iface}";
2949 }
2950
2951 if ($rule->{type} ne 'group') {
2952 $raw .= " -source $rule->{source}" if $rule->{source};
2953 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2954 $raw .= " -p $rule->{proto}" if $rule->{proto};
2955 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2956 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2957 }
2958
2959 $raw .= " # " . encode('utf8', $rule->{comment})
2960 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2961 $raw .= "\n";
2962 } else {
2963 die "unknown rule type '$rule->{type}'";
2964 }
2965 }
2966
2967 return $raw;
2968};
2969
2970my $format_options = sub {
2971 my ($options) = @_;
2972
2973 my $raw = '';
2974
2975 $raw .= "[OPTIONS]\n\n";
2976 foreach my $opt (keys %$options) {
2977 $raw .= "$opt: $options->{$opt}\n";
2978 }
2979 $raw .= "\n";
2980
2981 return $raw;
2982};
2983
2984my $format_aliases = sub {
2985 my ($aliases) = @_;
2986
2987 my $raw = '';
2988
2989 $raw .= "[ALIASES]\n\n";
2990 foreach my $k (keys %$aliases) {
2991 my $e = $aliases->{$k};
2992 $raw .= "$e->{name} $e->{cidr}";
2993 $raw .= " # " . encode('utf8', $e->{comment})
2994 if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2995 $raw .= "\n";
2996 }
2997 $raw .= "\n";
2998
2999 return $raw;
3000};
3001
3002my $format_ipsets = sub {
3003 my ($fw_conf) = @_;
3004
3005 my $raw = '';
3006
3007 foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
3008 if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
3009 my $utf8comment = encode('utf8', $comment);
3010 $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3011 } else {
3012 $raw .= "[IPSET $ipset]\n\n";
3013 }
3014 my $options = $fw_conf->{ipset}->{$ipset};
3015
3016 my $nethash = {};
3017 foreach my $entry (@$options) {
3018 $nethash->{$entry->{cidr}} = $entry;
3019 }
3020
3021 foreach my $cidr (sort keys %$nethash) {
3022 my $entry = $nethash->{$cidr};
3023 my $line = $entry->{nomatch} ? '!' : '';
3024 $line .= $entry->{cidr};
3025 $line .= " # " . encode('utf8', $entry->{comment})
3026 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3027 $raw .= "$line\n";
3028 }
3029
3030 $raw .= "\n";
3031 }
3032
3033 return $raw;
3034};
3035
3036sub save_vmfw_conf {
3037 my ($vmid, $vmfw_conf) = @_;
3038
3039 my $raw = '';
3040
3041 my $options = $vmfw_conf->{options};
3042 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3043
3044 my $aliases = $vmfw_conf->{aliases};
3045 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3046
3047 $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
3048
3049 my $rules = $vmfw_conf->{rules} || [];
3050 if ($rules && scalar(@$rules)) {
3051 $raw .= "[RULES]\n\n";
3052 $raw .= &$format_rules($rules, 1);
3053 $raw .= "\n";
3054 }
3055
3056 my $filename = "$pvefw_conf_dir/$vmid.fw";
3057 if ($raw) {
3058 mkdir $pvefw_conf_dir;
3059 PVE::Tools::file_set_contents($filename, $raw);
3060 } else {
3061 unlink $filename;
3062 }
3063}
3064
3065sub remove_vmfw_conf {
3066 my ($vmid) = @_;
3067
3068 my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3069
3070 unlink $vmfw_conffile;
3071}
3072
3073sub clone_vmfw_conf {
3074 my ($vmid, $newid) = @_;
3075
3076 my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3077 my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3078
3079 if (-f $clonevm_conffile) {
3080 unlink $clonevm_conffile;
3081 }
3082 if (-f $sourcevm_conffile) {
3083 my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3084 PVE::Tools::file_set_contents($clonevm_conffile, $data);
3085 }
3086}
3087
3088sub read_vm_firewall_configs {
3089 my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
3090
3091 my $vmfw_configs = {};
3092
3093 foreach my $vmid (keys %{$vmdata->{qemu}}) {
3094 my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
3095 next if !$vmfw_conf->{options}; # skip if file does not exists
3096 $vmfw_configs->{$vmid} = $vmfw_conf;
3097 }
3098 foreach my $vmid (keys %{$vmdata->{lxc}}) {
3099 my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
3100 next if !$vmfw_conf->{options}; # skip if file does not exists
3101 $vmfw_configs->{$vmid} = $vmfw_conf;
3102 }
3103
3104 return $vmfw_configs;
3105}
3106
3107sub get_option_log_level {
3108 my ($options, $k) = @_;
3109
3110 my $v = $options->{$k};
3111 $v = $default_log_level if !defined($v);
3112
3113 return undef if $v eq '' || $v eq 'nolog';
3114
3115 $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
3116
3117 return $v if ($v >= 0) && ($v <= 7);
3118
3119 warn "unknown log level ($k = '$v')\n";
3120
3121 return undef;
3122}
3123
3124sub generate_std_chains {
3125 my ($ruleset, $options, $ipversion) = @_;
3126
3127 my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3128
3129 my $loglevel = get_option_log_level($options, 'smurf_log_level');
3130
3131 my $chain;
3132
3133 if ($ipversion == 4) {
3134 # same as shorewall smurflog.
3135 $chain = 'PVEFW-smurflog';
3136 $std_chains->{$chain} = [];
3137
3138 push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
3139 push @{$std_chains->{$chain}}, "-j DROP";
3140 }
3141
3142 # same as shorewall logflags action.
3143 $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
3144 $chain = 'PVEFW-logflags';
3145 $std_chains->{$chain} = [];
3146
3147 # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
3148 push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
3149 push @{$std_chains->{$chain}}, "-j DROP";
3150
3151 foreach my $chain (keys %$std_chains) {
3152 ruleset_create_chain($ruleset, $chain);
3153 foreach my $rule (@{$std_chains->{$chain}}) {
3154 if (ref($rule)) {
3155 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
3156 } else {
3157 ruleset_addrule_old($ruleset, $chain, $rule);
3158 }
3159 }
3160 }
3161}
3162
3163sub generate_ipset_chains {
3164 my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3165
3166 foreach my $ipset (keys %{$ipsets}) {
3167
3168 my $options = $ipsets->{$ipset};
3169
3170 if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3171 if (my $ips = $device_ips->{$1}) {
3172 $options = [@$options, @$ips];
3173 }
3174 }
3175
3176 # remove duplicates
3177 my $nethash = {};
3178 foreach my $entry (@$options) {
3179 next if $entry->{errors}; # skip entries with errors
3180 eval {
3181 my ($cidr, $ver);
3182 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3183 ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3184 } else {
3185 ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3186 }
3187 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3188 if ($ver == 6) {
3189 # ip_compress_address takes an address only, no CIDR
3190 my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3191 $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3192 $cidr .= $prefix_len if defined($prefix_len);
3193 $cidr =~ s|/128$||;
3194 } else {
3195 $cidr =~ s|/32$||;
3196 }
3197
3198 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3199 };
3200 warn $@ if $@;
3201 }
3202
3203 foreach my $ipversion (4, 6) {
3204 my $data = $nethash->{$ipversion};
3205
3206 my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3207
3208 my $hashsize = scalar(@$options);
3209 if ($hashsize <= 64) {
3210 $hashsize = 64;
3211 } else {
3212 $hashsize = round_powerof2($hashsize);
3213 }
3214
3215 my $family = $ipversion == "6" ? "inet6" : "inet";
3216
3217 $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3218
3219 foreach my $cidr (sort keys %$data) {
3220 my $entry = $data->{$cidr};
3221
3222 my $cmd = "add $name $cidr";
3223 if ($entry->{nomatch}) {
3224 if ($feature_ipset_nomatch) {
3225 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3226 } else {
3227 warn "ignore !$cidr - nomatch not supported by kernel\n";
3228 }
3229 } else {
3230 push @{$ipset_ruleset->{$name}}, $cmd;
3231 }
3232 }
3233 }
3234 }
3235}
3236
3237sub round_powerof2 {
3238 my ($int) = @_;
3239
3240 $int--;
3241 $int |= $int >> $_ foreach (1,2,4,8,16);
3242 return ++$int;
3243}
3244
3245sub load_clusterfw_conf {
3246 my ($filename, $verbose) = @_;
3247
3248 $filename = $clusterfw_conf_filename if !defined($filename);
3249
3250 my $cluster_conf = {};
3251 if (my $fh = IO::File->new($filename, O_RDONLY)) {
3252 $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3253 }
3254
3255 return $cluster_conf;
3256}
3257
3258sub save_clusterfw_conf {
3259 my ($cluster_conf) = @_;
3260
3261 my $raw = '';
3262
3263 my $options = $cluster_conf->{options};
3264 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3265
3266 my $aliases = $cluster_conf->{aliases};
3267 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3268
3269 $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3270
3271 my $rules = $cluster_conf->{rules};
3272 if ($rules && scalar(@$rules)) {
3273 $raw .= "[RULES]\n\n";
3274 $raw .= &$format_rules($rules, 1);
3275 $raw .= "\n";
3276 }
3277
3278 if ($cluster_conf->{groups}) {
3279 foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3280 my $rules = $cluster_conf->{groups}->{$group};
3281 if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3282 my $utf8comment = encode('utf8', $comment);
3283 $raw .= "[group $group] # $utf8comment\n\n";
3284 } else {
3285 $raw .= "[group $group]\n\n";
3286 }
3287
3288 $raw .= &$format_rules($rules, 0);
3289 $raw .= "\n";
3290 }
3291 }
3292
3293 if ($raw) {
3294 mkdir $pvefw_conf_dir;
3295 PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3296 } else {
3297 unlink $clusterfw_conf_filename;
3298 }
3299}
3300
3301sub load_hostfw_conf {
3302 my ($cluster_conf, $filename, $verbose) = @_;
3303
3304 $filename = $hostfw_conf_filename if !defined($filename);
3305
3306 my $hostfw_conf = {};
3307 if (my $fh = IO::File->new($filename, O_RDONLY)) {
3308 $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3309 }
3310 return $hostfw_conf;
3311}
3312
3313sub save_hostfw_conf {
3314 my ($hostfw_conf) = @_;
3315
3316 my $raw = '';
3317
3318 my $options = $hostfw_conf->{options};
3319 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3320
3321 my $rules = $hostfw_conf->{rules};
3322 if ($rules && scalar(@$rules)) {
3323 $raw .= "[RULES]\n\n";
3324 $raw .= &$format_rules($rules, 1);
3325 $raw .= "\n";
3326 }
3327
3328 if ($raw) {
3329 PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3330 } else {
3331 unlink $hostfw_conf_filename;
3332 }
3333}
3334
3335sub compile {
3336 my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3337
3338 my $vmfw_configs;
3339
3340 if ($vmdata) { # test mode
3341 my $testdir = $vmdata->{testdir} || die "no test directory specified";
3342 my $filename = "$testdir/cluster.fw";
3343 $cluster_conf = load_clusterfw_conf($filename, $verbose);
3344
3345 $filename = "$testdir/host.fw";
3346 $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3347
3348 $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3349 } else { # normal operation
3350 $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3351
3352 $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3353
3354 $vmdata = read_local_vm_config();
3355 $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3356 }
3357
3358 return ({},{},{}) if !$cluster_conf->{options}->{enable};
3359
3360 my $localnet;
3361 if ($cluster_conf->{aliases}->{local_network}) {
3362 $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3363 } else {
3364 my $localnet_ver;
3365 ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3366
3367 $cluster_conf->{aliases}->{local_network} = {
3368 name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3369 }
3370
3371 push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3372
3373 my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3374 my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3375 my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3376
3377 return ($ruleset, $ipset_ruleset, $rulesetv6);
3378}
3379
3380sub compile_iptables_filter {
3381 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3382
3383 my $ruleset = {};
3384
3385 ruleset_create_chain($ruleset, "PVEFW-INPUT");
3386 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3387
3388 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3389
3390 my $hostfw_options = $hostfw_conf->{options} || {};
3391
3392 # fixme: what log level should we use here?
3393 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3394
3395 ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3396
3397 ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3398 ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3399
3400 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3401
3402 ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3403 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3404
3405 generate_std_chains($ruleset, $hostfw_options, $ipversion);
3406
3407 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3408
3409 if ($hostfw_enable) {
3410 eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3411 warn $@ if $@; # just to be sure - should not happen
3412 }
3413
3414 # generate firewall rules for QEMU VMs
3415 foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3416 eval {
3417 my $conf = $vmdata->{qemu}->{$vmid};
3418 my $vmfw_conf = $vmfw_configs->{$vmid};
3419 return if !$vmfw_conf;
3420
3421 foreach my $netid (sort keys %$conf) {
3422 next if $netid !~ m/^net(\d+)$/;
3423 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3424 next if !$net->{firewall};
3425 my $iface = "tap${vmid}i$1";
3426
3427 my $macaddr = $net->{macaddr};
3428 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3429 $vmfw_conf, $vmid, 'IN', $ipversion);
3430 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3431 $vmfw_conf, $vmid, 'OUT', $ipversion);
3432 }
3433 };
3434 warn $@ if $@; # just to be sure - should not happen
3435 }
3436
3437 # generate firewall rules for LXC containers
3438 foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3439 eval {
3440 my $conf = $vmdata->{lxc}->{$vmid};
3441 my $vmfw_conf = $vmfw_configs->{$vmid};
3442 return if !$vmfw_conf;
3443
3444 if ($vmfw_conf->{options}->{enable}) {
3445 foreach my $netid (sort keys %$conf) {
3446 next if $netid !~ m/^net(\d+)$/;
3447 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3448 next if !$net->{firewall};
3449 my $iface = "veth${vmid}i$1";
3450 my $macaddr = $net->{hwaddr};
3451 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3452 $vmfw_conf, $vmid, 'IN', $ipversion);
3453 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3454 $vmfw_conf, $vmid, 'OUT', $ipversion);
3455 }
3456 }
3457 };
3458 warn $@ if $@; # just to be sure - should not happen
3459 }
3460
3461 if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3462 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3463 }
3464
3465 return $ruleset;
3466}
3467
3468sub mac_to_linklocal {
3469 my ($macaddr) = @_;
3470 my @parts = split(/:/, $macaddr);
3471 # The standard link local address uses the fe80::/64 prefix with the
3472 # modified EUI-64 identifier derived from the MAC address by flipping the
3473 # universal/local bit and inserting FF:FE in the middle.
3474 # See RFC 4291.
3475 $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3476 my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3477 return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3478}
3479
3480sub compile_ipsets {
3481 my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3482
3483 my $localnet;
3484 if ($cluster_conf->{aliases}->{local_network}) {
3485 $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3486 } else {
3487 my $localnet_ver;
3488 ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3489
3490 $cluster_conf->{aliases}->{local_network} = {
3491 name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3492 }
3493
3494 push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3495
3496
3497 my $ipset_ruleset = {};
3498
3499 # generate ipsets for QEMU VMs
3500 foreach my $vmid (keys %{$vmdata->{qemu}}) {
3501 eval {
3502 my $conf = $vmdata->{qemu}->{$vmid};
3503 my $vmfw_conf = $vmfw_configs->{$vmid};
3504 return if !$vmfw_conf;
3505
3506 # When the 'ipfilter' option is enabled every device for which there
3507 # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3508 # ipset.
3509 # The reason is that ipfilter ipsets are always filled with standard
3510 # IPv6 link-local filters.
3511 my $ipsets = $vmfw_conf->{ipset};
3512 my $implicit_sets = {};
3513
3514 my $device_ips = {};
3515 foreach my $netid (keys %$conf) {
3516 next if $netid !~ m/^net(\d+)$/;
3517 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3518 next if !$net->{firewall};
3519
3520 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3521 $implicit_sets->{"ipfilter-$netid"} = [];
3522 }
3523
3524 my $macaddr = $net->{macaddr};
3525 my $linklocal = mac_to_linklocal($macaddr);
3526 $device_ips->{$netid} = [
3527 { cidr => $linklocal },
3528 { cidr => 'fe80::/10', nomatch => 1 }
3529 ];
3530 }
3531
3532 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3533 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3534 };
3535 warn $@ if $@; # just to be sure - should not happen
3536 }
3537
3538 # generate firewall rules for LXC containers
3539 foreach my $vmid (keys %{$vmdata->{lxc}}) {
3540 eval {
3541 my $conf = $vmdata->{lxc}->{$vmid};
3542 my $vmfw_conf = $vmfw_configs->{$vmid};
3543 return if !$vmfw_conf;
3544
3545 # When the 'ipfilter' option is enabled every device for which there
3546 # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3547 # ipset.
3548 # The reason is that ipfilter ipsets are always filled with standard
3549 # IPv6 link-local filters, as well as the IP addresses configured
3550 # for the container.
3551 my $ipsets = $vmfw_conf->{ipset};
3552 my $implicit_sets = {};
3553
3554 my $device_ips = {};
3555 foreach my $netid (keys %$conf) {
3556 next if $netid !~ m/^net(\d+)$/;
3557 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3558 next if !$net->{firewall};
3559
3560 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3561 $implicit_sets->{"ipfilter-$netid"} = [];
3562 }
3563
3564 my $macaddr = $net->{hwaddr};
3565 my $linklocal = mac_to_linklocal($macaddr);
3566 my $set = $device_ips->{$netid} = [
3567 { cidr => $linklocal },
3568 { cidr => 'fe80::/10', nomatch => 1 }
3569 ];
3570 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3571 push @$set, { cidr => $1 };
3572 }
3573 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3574 push @$set, { cidr => $1 };
3575 }
3576 }
3577
3578 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3579 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3580 };
3581 warn $@ if $@; # just to be sure - should not happen
3582 }
3583
3584 generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3585
3586 return $ipset_ruleset;
3587}
3588
3589sub get_ruleset_status {
3590 my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3591
3592 my $statushash = {};
3593
3594 foreach my $chain (sort keys %$ruleset) {
3595 my $sig = &$digest_fn($ruleset->{$chain});
3596
3597 $statushash->{$chain}->{sig} = $sig;
3598
3599 my $oldsig = $active_chains->{$chain};
3600 if (!defined($oldsig)) {
3601 $statushash->{$chain}->{action} = 'create';
3602 } else {
3603 if ($oldsig eq $sig) {
3604 $statushash->{$chain}->{action} = 'exists';
3605 } else {
3606 $statushash->{$chain}->{action} = 'update';
3607 }
3608 }
3609 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3610 foreach my $cmd (@{$ruleset->{$chain}}) {
3611 print "\t$cmd\n" if $verbose;
3612 }
3613 }
3614
3615 foreach my $chain (sort keys %$active_chains) {
3616 if (!defined($ruleset->{$chain})) {
3617 my $sig = $active_chains->{$chain};
3618 $statushash->{$chain}->{action} = 'delete';
3619 $statushash->{$chain}->{sig} = $sig;
3620 print "delete $chain ($sig)\n" if $verbose;
3621 }
3622 }
3623
3624 return $statushash;
3625}
3626
3627sub print_sig_rule {
3628 my ($chain, $sig) = @_;
3629
3630 # We just use this to store a SHA1 checksum used to detect changes
3631 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3632}
3633
3634sub get_ruleset_cmdlist {
3635 my ($ruleset, $verbose, $iptablescmd) = @_;
3636
3637 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3638
3639 my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3640 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3641
3642 # create missing chains first
3643 foreach my $chain (sort keys %$ruleset) {
3644 my $stat = $statushash->{$chain};
3645 die "internal error" if !$stat;
3646 next if $stat->{action} ne 'create';
3647
3648 $cmdlist .= ":$chain - [0:0]\n";
3649 }
3650
3651 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3652 my $chain = "PVEFW-$h";
3653 if ($ruleset->{$chain} && !$hooks->{$h}) {
3654 $cmdlist .= "-A $h -j $chain\n";
3655 }
3656 }
3657
3658 foreach my $chain (sort keys %$ruleset) {
3659 my $stat = $statushash->{$chain};
3660 die "internal error" if !$stat;
3661
3662 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3663 $cmdlist .= "-F $chain\n";
3664 foreach my $cmd (@{$ruleset->{$chain}}) {
3665 $cmdlist .= "$cmd\n";
3666 }
3667 $cmdlist .= print_sig_rule($chain, $stat->{sig});
3668 } elsif ($stat->{action} eq 'delete') {
3669 die "internal error"; # this should not happen
3670 } elsif ($stat->{action} eq 'exists') {
3671 # do nothing
3672 } else {
3673 die "internal error - unknown status '$stat->{action}'";
3674 }
3675 }
3676
3677 foreach my $chain (keys %$statushash) {
3678 next if $statushash->{$chain}->{action} ne 'delete';
3679 $cmdlist .= "-F $chain\n";
3680 }
3681 foreach my $chain (keys %$statushash) {
3682 next if $statushash->{$chain}->{action} ne 'delete';
3683 next if $chain eq 'PVEFW-INPUT';
3684 next if $chain eq 'PVEFW-OUTPUT';
3685 next if $chain eq 'PVEFW-FORWARD';
3686 $cmdlist .= "-X $chain\n";
3687 }
3688
3689 my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3690
3691 $cmdlist .= "COMMIT\n";
3692
3693 return wantarray ? ($cmdlist, $changes) : $cmdlist;
3694}
3695
3696sub get_ipset_cmdlist {
3697 my ($ruleset, $verbose) = @_;
3698
3699 my $cmdlist = "";
3700
3701 my $delete_cmdlist = "";
3702
3703 my $active_chains = ipset_get_chains();
3704 my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3705
3706 # remove stale _swap chains
3707 foreach my $chain (keys %$active_chains) {
3708 if ($chain =~ m/^PVEFW-\S+_swap$/) {
3709 $cmdlist .= "destroy $chain\n";
3710 }
3711 }
3712
3713 foreach my $chain (keys %$ruleset) {
3714 my $stat = $statushash->{$chain};
3715 die "internal error" if !$stat;
3716
3717 if ($stat->{action} eq 'create') {
3718 foreach my $cmd (@{$ruleset->{$chain}}) {
3719 $cmdlist .= "$cmd\n";
3720 }
3721 }
3722 }
3723
3724 foreach my $chain (keys %$ruleset) {
3725 my $stat = $statushash->{$chain};
3726 die "internal error" if !$stat;
3727
3728 if ($stat->{action} eq 'update') {
3729 my $chain_swap = $chain."_swap";
3730
3731 foreach my $cmd (@{$ruleset->{$chain}}) {
3732 $cmd =~ s/$chain/$chain_swap/;
3733 $cmdlist .= "$cmd\n";
3734 }
3735 $cmdlist .= "swap $chain_swap $chain\n";
3736 $cmdlist .= "flush $chain_swap\n";
3737 $cmdlist .= "destroy $chain_swap\n";
3738 }
3739 }
3740
3741 # the remove unused chains
3742 foreach my $chain (keys %$statushash) {
3743 next if $statushash->{$chain}->{action} ne 'delete';
3744
3745 $delete_cmdlist .= "flush $chain\n";
3746 $delete_cmdlist .= "destroy $chain\n";
3747 }
3748
3749 my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3750
3751 return ($cmdlist, $delete_cmdlist, $changes);
3752}
3753
3754sub apply_ruleset {
3755 my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3756
3757 enable_bridge_firewall();
3758
3759 my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3760 get_ipset_cmdlist($ipset_ruleset, $verbose);
3761
3762 my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3763 my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3764
3765 if ($verbose) {
3766 if ($ipset_changes) {
3767 print "ipset changes:\n";
3768 print $ipset_create_cmdlist if $ipset_create_cmdlist;
3769 print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3770 }
3771
3772 if ($changes) {
3773 print "iptables changes:\n";
3774 print $cmdlist;
3775 }
3776
3777 if ($changesv6) {
3778 print "ip6tables changes:\n";
3779 print $cmdlistv6;
3780 }
3781 }
3782
3783 my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3784 PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3785
3786 ipset_restore_cmdlist($ipset_create_cmdlist);
3787
3788 $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3789 PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3790
3791 iptables_restore_cmdlist($cmdlist);
3792
3793 $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3794 PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3795
3796 ip6tables_restore_cmdlist($cmdlistv6);
3797
3798 $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3799 PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3800
3801 ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3802
3803 # test: re-read status and check if everything is up to date
3804 my $active_chains = iptables_get_chains();
3805 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3806
3807 my $errors;
3808 foreach my $chain (sort keys %$ruleset) {
3809 my $stat = $statushash->{$chain};
3810 if ($stat->{action} ne 'exists') {
3811 warn "unable to update chain '$chain'\n";
3812 $errors = 1;
3813 }
3814 }
3815
3816 my $active_chainsv6 = iptables_get_chains("ip6tables");
3817 my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3818
3819 foreach my $chain (sort keys %$rulesetv6) {
3820 my $stat = $statushashv6->{$chain};
3821 if ($stat->{action} ne 'exists') {
3822 warn "unable to update chain '$chain'\n";
3823 $errors = 1;
3824 }
3825 }
3826
3827 die "unable to apply firewall changes\n" if $errors;
3828
3829 update_nf_conntrack_max($hostfw_conf);
3830
3831 update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3832
3833}
3834
3835sub update_nf_conntrack_max {
3836 my ($hostfw_conf) = @_;
3837
3838 my $max = 65536; # reasonable default
3839
3840 my $options = $hostfw_conf->{options} || {};
3841
3842 if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3843 $max = $options->{nf_conntrack_max};
3844 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3845 }
3846
3847 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3848 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3849
3850 my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3851
3852 if ($current != $max) {
3853 my $hashsize = int($max/4);
3854 PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3855 PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3856 }
3857}
3858
3859sub update_nf_conntrack_tcp_timeout_established {
3860 my ($hostfw_conf) = @_;
3861
3862 my $options = $hostfw_conf->{options} || {};
3863
3864 my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3865
3866 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3867}
3868
3869sub remove_pvefw_chains {
3870
3871 PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3872 PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3873 PVE::Firewall::remove_pvefw_chains_ipset();
3874
3875}
3876
3877sub remove_pvefw_chains_iptables {
3878 my ($iptablescmd) = @_;
3879
3880 my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3881 my $cmdlist = "*filter\n";
3882
3883 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3884 if ($hooks->{$h}) {
3885 $cmdlist .= "-D $h -j PVEFW-$h\n";
3886 }
3887 }
3888
3889 foreach my $chain (keys %$chash) {
3890 $cmdlist .= "-F $chain\n";
3891 }
3892
3893 foreach my $chain (keys %$chash) {
3894 $cmdlist .= "-X $chain\n";
3895 }
3896 $cmdlist .= "COMMIT\n";
3897
3898 if($iptablescmd eq "ip6tables") {
3899 ip6tables_restore_cmdlist($cmdlist);
3900 } else {
3901 iptables_restore_cmdlist($cmdlist);
3902 }
3903}
3904
3905sub remove_pvefw_chains_ipset {
3906
3907 my $ipset_chains = ipset_get_chains();
3908
3909 my $cmdlist = "";
3910
3911 foreach my $chain (keys %$ipset_chains) {
3912 $cmdlist .= "flush $chain\n";
3913 $cmdlist .= "destroy $chain\n";
3914 }
3915
3916 ipset_restore_cmdlist($cmdlist) if $cmdlist;
3917}
3918
3919sub init {
3920 my $cluster_conf = load_clusterfw_conf();
3921 my $cluster_options = $cluster_conf->{options};
3922 my $enable = $cluster_options->{enable};
3923
3924 return if !$enable;
3925
3926 # load required modules here
3927}
3928
3929sub update {
3930 my $code = sub {
3931
3932 my $cluster_conf = load_clusterfw_conf();
3933 my $cluster_options = $cluster_conf->{options};
3934
3935 if (!$cluster_options->{enable}) {
3936 PVE::Firewall::remove_pvefw_chains();
3937 return;
3938 }
3939
3940 my $hostfw_conf = load_hostfw_conf($cluster_conf);
3941
3942 my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3943
3944 apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3945 };
3946
3947 run_locked($code);
3948}
3949
39501;
Firewall test scripts