improve search for local-network
[pve-firewall.git] / src / PVE / Firewall.pm
1 package PVE::Firewall;
2
3 use warnings;
4 use strict;
5 use POSIX;
6 use Data::Dumper;
7 use Digest::SHA;
8 use Socket qw(AF_INET6 inet_ntop inet_pton);
9 use PVE::INotify;
10 use PVE::Exception qw(raise raise_param_exc);
11 use PVE::JSONSchema qw(register_standard_option get_standard_option);
12 use PVE::Cluster;
13 use PVE::ProcFSTools;
14 use PVE::Tools qw($IPV4RE $IPV6RE);
15 use PVE::Network;
16 use File::Basename;
17 use File::Path;
18 use IO::File;
19 use Net::IP;
20 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
21 use Encode;
22
23 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
24 my $pvefw_conf_dir = "/etc/pve/firewall";
25 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
26
27 # dynamically include PVE::QemuServer and PVE::LXC
28 # to avoid dependency problems
29 my $have_qemu_server;
30 eval {
31 require PVE::QemuServer;
32 require PVE::QemuConfig;
33 $have_qemu_server = 1;
34 };
35
36 my $have_lxc;
37 eval {
38 require PVE::LXC;
39 $have_lxc = 1;
40 };
41
42
43 my $pve_fw_status_dir = "/var/lib/pve-firewall";
44
45 mkdir $pve_fw_status_dir; # make sure this exists
46
47 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
48 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
49 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
50
51 my $max_alias_name_length = 64;
52 my $max_ipset_name_length = 64;
53 my $max_group_name_length = 18;
54
55 my $PROTOCOLS_WITH_PORTS = {
56 udp => 1, 17 => 1,
57 udplite => 1, 136 => 1,
58 tcp => 1, 6 => 1,
59 dccp => 1, 33 => 1,
60 sctp => 1, 132 => 1,
61 };
62
63 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
64 sub pve_verify_ip_or_cidr {
65 my ($cidr, $noerr) = @_;
66
67 if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
68 return $cidr if Net::IP->new($cidr);
69 return undef if $noerr;
70 die Net::IP::Error() . "\n";
71 }
72 return undef if $noerr;
73 die "value does not look like a valid IP address or CIDR network\n";
74 }
75
76 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
77 sub pve_verify_ip_or_cidr_or_alias {
78 my ($cidr, $noerr) = @_;
79
80 return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
81
82 return pve_verify_ip_or_cidr($cidr, $noerr);
83 }
84
85 PVE::JSONSchema::register_standard_option('ipset-name', {
86 description => "IP set name.",
87 type => 'string',
88 pattern => $ipset_name_pattern,
89 minLength => 2,
90 maxLength => $max_ipset_name_length,
91 });
92
93 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
94 description => "Alias name.",
95 type => 'string',
96 pattern => $ip_alias_pattern,
97 minLength => 2,
98 maxLength => $max_alias_name_length,
99 });
100
101 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
102 description => "Log level.",
103 type => 'string',
104 enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
105 optional => 1,
106 });
107
108 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
109 description => "Security Group name.",
110 type => 'string',
111 pattern => $security_group_name_pattern,
112 minLength => 2,
113 maxLength => $max_group_name_length,
114 });
115
116 my $feature_ipset_nomatch = 0;
117 eval {
118 my (undef, undef, $release) = POSIX::uname();
119 if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
120 my ($major, $minor) = ($1, $2);
121 $feature_ipset_nomatch = 1 if ($major > 3) ||
122 ($major == 3 && $minor >= 7);
123 }
124
125 };
126
127 my $nodename = PVE::INotify::nodename();
128
129 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
130
131 my $default_log_level = 'nolog'; # avoid logs by default
132
133 my $log_level_hash = {
134 debug => 7,
135 info => 6,
136 notice => 5,
137 warning => 4,
138 err => 3,
139 crit => 2,
140 alert => 1,
141 emerg => 0,
142 };
143
144 # we need to overwrite some macros for ipv6
145 my $pve_ipv6fw_macros = {
146 'Ping' => [
147 { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
148 ],
149 'NeighborDiscovery' => [
150 "IPv6 neighbor solicitation, neighbor and router advertisement",
151 { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
152 { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
153 { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
154 { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
155 ],
156 'DHCPv6' => [
157 "DHCPv6 traffic",
158 { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
159 ],
160 'Trcrt' => [
161 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
162 { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
163 ],
164 };
165
166 # imported/converted from: /usr/share/shorewall/macro.*
167 my $pve_fw_macros = {
168 'Amanda' => [
169 "Amanda Backup",
170 { action => 'PARAM', proto => 'udp', dport => '10080' },
171 { action => 'PARAM', proto => 'tcp', dport => '10080' },
172 ],
173 'Auth' => [
174 "Auth (identd) traffic",
175 { action => 'PARAM', proto => 'tcp', dport => '113' },
176 ],
177 'BGP' => [
178 "Border Gateway Protocol traffic",
179 { action => 'PARAM', proto => 'tcp', dport => '179' },
180 ],
181 'BitTorrent' => [
182 "BitTorrent traffic for BitTorrent 3.1 and earlier",
183 { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
184 { action => 'PARAM', proto => 'udp', dport => '6881' },
185 ],
186 'BitTorrent32' => [
187 "BitTorrent traffic for BitTorrent 3.2 and later",
188 { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
189 { action => 'PARAM', proto => 'udp', dport => '6881' },
190 ],
191 'Ceph' => [
192 "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
193 { action => 'PARAM', proto => 'tcp', dport => '6789' },
194 { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
195 ],
196 'CVS' => [
197 "Concurrent Versions System pserver traffic",
198 { action => 'PARAM', proto => 'tcp', dport => '2401' },
199 ],
200 'Citrix' => [
201 "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
202 { action => 'PARAM', proto => 'tcp', dport => '1494' },
203 { action => 'PARAM', proto => 'udp', dport => '1604' },
204 { action => 'PARAM', proto => 'tcp', dport => '2598' },
205 ],
206 'DAAP' => [
207 "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
208 { action => 'PARAM', proto => 'tcp', dport => '3689' },
209 { action => 'PARAM', proto => 'udp', dport => '3689' },
210 ],
211 'DCC' => [
212 "Distributed Checksum Clearinghouse spam filtering mechanism",
213 { action => 'PARAM', proto => 'tcp', dport => '6277' },
214 ],
215 'DHCPfwd' => [
216 "Forwarded DHCP traffic",
217 { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
218 ],
219 'DNS' => [
220 "Domain Name System traffic (upd and tcp)",
221 { action => 'PARAM', proto => 'udp', dport => '53' },
222 { action => 'PARAM', proto => 'tcp', dport => '53' },
223 ],
224 'Distcc' => [
225 "Distributed Compiler service",
226 { action => 'PARAM', proto => 'tcp', dport => '3632' },
227 ],
228 'FTP' => [
229 "File Transfer Protocol",
230 { action => 'PARAM', proto => 'tcp', dport => '21' },
231 ],
232 'Finger' => [
233 "Finger protocol (RFC 742)",
234 { action => 'PARAM', proto => 'tcp', dport => '79' },
235 ],
236 'GNUnet' => [
237 "GNUnet secure peer-to-peer networking traffic",
238 { action => 'PARAM', proto => 'tcp', dport => '2086' },
239 { action => 'PARAM', proto => 'udp', dport => '2086' },
240 { action => 'PARAM', proto => 'tcp', dport => '1080' },
241 { action => 'PARAM', proto => 'udp', dport => '1080' },
242 ],
243 'GRE' => [
244 "Generic Routing Encapsulation tunneling protocol",
245 { action => 'PARAM', proto => '47' },
246 ],
247 'Git' => [
248 "Git distributed revision control traffic",
249 { action => 'PARAM', proto => 'tcp', dport => '9418' },
250 ],
251 'HKP' => [
252 "OpenPGP HTTP keyserver protocol traffic",
253 { action => 'PARAM', proto => 'tcp', dport => '11371' },
254 ],
255 'HTTP' => [
256 "Hypertext Transfer Protocol (WWW)",
257 { action => 'PARAM', proto => 'tcp', dport => '80' },
258 ],
259 'HTTPS' => [
260 "Hypertext Transfer Protocol (WWW) over SSL",
261 { action => 'PARAM', proto => 'tcp', dport => '443' },
262 ],
263 'ICPV2' => [
264 "Internet Cache Protocol V2 (Squid) traffic",
265 { action => 'PARAM', proto => 'udp', dport => '3130' },
266 ],
267 'ICQ' => [
268 "AOL Instant Messenger traffic",
269 { action => 'PARAM', proto => 'tcp', dport => '5190' },
270 ],
271 'IMAP' => [
272 "Internet Message Access Protocol",
273 { action => 'PARAM', proto => 'tcp', dport => '143' },
274 ],
275 'IMAPS' => [
276 "Internet Message Access Protocol over SSL",
277 { action => 'PARAM', proto => 'tcp', dport => '993' },
278 ],
279 'IPIP' => [
280 "IPIP capsulation traffic",
281 { action => 'PARAM', proto => '94' },
282 ],
283 'IPsec' => [
284 "IPsec traffic",
285 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
286 { action => 'PARAM', proto => '50' },
287 ],
288 'IPsecah' => [
289 "IPsec authentication (AH) traffic",
290 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
291 { action => 'PARAM', proto => '51' },
292 ],
293 'IPsecnat' => [
294 "IPsec traffic and Nat-Traversal",
295 { action => 'PARAM', proto => 'udp', dport => '500' },
296 { action => 'PARAM', proto => 'udp', dport => '4500' },
297 { action => 'PARAM', proto => '50' },
298 ],
299 'IRC' => [
300 "Internet Relay Chat traffic",
301 { action => 'PARAM', proto => 'tcp', dport => '6667' },
302 ],
303 'Jetdirect' => [
304 "HP Jetdirect printing",
305 { action => 'PARAM', proto => 'tcp', dport => '9100' },
306 ],
307 'L2TP' => [
308 "Layer 2 Tunneling Protocol traffic",
309 { action => 'PARAM', proto => 'udp', dport => '1701' },
310 ],
311 'LDAP' => [
312 "Lightweight Directory Access Protocol traffic",
313 { action => 'PARAM', proto => 'tcp', dport => '389' },
314 ],
315 'LDAPS' => [
316 "Secure Lightweight Directory Access Protocol traffic",
317 { action => 'PARAM', proto => 'tcp', dport => '636' },
318 ],
319 'MSNP' => [
320 "Microsoft Notification Protocol",
321 { action => 'PARAM', proto => 'tcp', dport => '1863' },
322 ],
323 'MSSQL' => [
324 "Microsoft SQL Server",
325 { action => 'PARAM', proto => 'tcp', dport => '1433' },
326 ],
327 'Mail' => [
328 "Mail traffic (SMTP, SMTPS, Submission)",
329 { action => 'PARAM', proto => 'tcp', dport => '25' },
330 { action => 'PARAM', proto => 'tcp', dport => '465' },
331 { action => 'PARAM', proto => 'tcp', dport => '587' },
332 ],
333 'MDNS' => [
334 "Multicast DNS",
335 { action => 'PARAM', proto => 'udp', dport => '5353' },
336 ],
337 'Munin' => [
338 "Munin networked resource monitoring traffic",
339 { action => 'PARAM', proto => 'tcp', dport => '4949' },
340 ],
341 'MySQL' => [
342 "MySQL server",
343 { action => 'PARAM', proto => 'tcp', dport => '3306' },
344 ],
345 'NNTP' => [
346 "NNTP traffic (Usenet).",
347 { action => 'PARAM', proto => 'tcp', dport => '119' },
348 ],
349 'NNTPS' => [
350 "Encrypted NNTP traffic (Usenet)",
351 { action => 'PARAM', proto => 'tcp', dport => '563' },
352 ],
353 'NTP' => [
354 "Network Time Protocol (ntpd)",
355 { action => 'PARAM', proto => 'udp', dport => '123' },
356 ],
357 'OSPF' => [
358 "OSPF multicast traffic",
359 { action => 'PARAM', proto => '89' },
360 ],
361 'OpenVPN' => [
362 "OpenVPN traffic",
363 { action => 'PARAM', proto => 'udp', dport => '1194' },
364 ],
365 'PCA' => [
366 "Symantec PCAnywere (tm)",
367 { action => 'PARAM', proto => 'udp', dport => '5632' },
368 { action => 'PARAM', proto => 'tcp', dport => '5631' },
369 ],
370 'POP3' => [
371 "POP3 traffic",
372 { action => 'PARAM', proto => 'tcp', dport => '110' },
373 ],
374 'POP3S' => [
375 "Encrypted POP3 traffic",
376 { action => 'PARAM', proto => 'tcp', dport => '995' },
377 ],
378 'PPtP' => [
379 "Point-to-Point Tunneling Protocol",
380 { action => 'PARAM', proto => '47' },
381 { action => 'PARAM', proto => 'tcp', dport => '1723' },
382 ],
383 'Ping' => [
384 "ICMP echo request",
385 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
386 ],
387 'PostgreSQL' => [
388 "PostgreSQL server",
389 { action => 'PARAM', proto => 'tcp', dport => '5432' },
390 ],
391 'Printer' => [
392 "Line Printer protocol printing",
393 { action => 'PARAM', proto => 'tcp', dport => '515' },
394 ],
395 'RDP' => [
396 "Microsoft Remote Desktop Protocol traffic",
397 { action => 'PARAM', proto => 'tcp', dport => '3389' },
398 ],
399 'RIP' => [
400 "Routing Information Protocol (bidirectional)",
401 { action => 'PARAM', proto => 'udp', dport => '520' },
402 ],
403 'RNDC' => [
404 "BIND remote management protocol",
405 { action => 'PARAM', proto => 'tcp', dport => '953' },
406 ],
407 'Razor' => [
408 "Razor Antispam System",
409 { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
410 ],
411 'Rdate' => [
412 "Remote time retrieval (rdate)",
413 { action => 'PARAM', proto => 'tcp', dport => '37' },
414 ],
415 'Rsync' => [
416 "Rsync server",
417 { action => 'PARAM', proto => 'tcp', dport => '873' },
418 ],
419 'SANE' => [
420 "SANE network scanning",
421 { action => 'PARAM', proto => 'tcp', dport => '6566' },
422 ],
423 'SMB' => [
424 "Microsoft SMB traffic",
425 { action => 'PARAM', proto => 'udp', dport => '135,445' },
426 { action => 'PARAM', proto => 'udp', dport => '137:139' },
427 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
428 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
429 ],
430 'SMBswat' => [
431 "Samba Web Administration Tool",
432 { action => 'PARAM', proto => 'tcp', dport => '901' },
433 ],
434 'SMTP' => [
435 "Simple Mail Transfer Protocol",
436 { action => 'PARAM', proto => 'tcp', dport => '25' },
437 ],
438 'SMTPS' => [
439 "Encrypted Simple Mail Transfer Protocol",
440 { action => 'PARAM', proto => 'tcp', dport => '465' },
441 ],
442 'SNMP' => [
443 "Simple Network Management Protocol",
444 { action => 'PARAM', proto => 'udp', dport => '161:162' },
445 { action => 'PARAM', proto => 'tcp', dport => '161' },
446 ],
447 'SPAMD' => [
448 "Spam Assassin SPAMD traffic",
449 { action => 'PARAM', proto => 'tcp', dport => '783' },
450 ],
451 'SSH' => [
452 "Secure shell traffic",
453 { action => 'PARAM', proto => 'tcp', dport => '22' },
454 ],
455 'SVN' => [
456 "Subversion server (svnserve)",
457 { action => 'PARAM', proto => 'tcp', dport => '3690' },
458 ],
459 'SixXS' => [
460 "SixXS IPv6 Deployment and Tunnel Broker",
461 { action => 'PARAM', proto => 'tcp', dport => '3874' },
462 { action => 'PARAM', proto => 'udp', dport => '3740' },
463 { action => 'PARAM', proto => '41' },
464 { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
465 ],
466 'Squid' => [
467 "Squid web proxy traffic",
468 { action => 'PARAM', proto => 'tcp', dport => '3128' },
469 ],
470 'Submission' => [
471 "Mail message submission traffic",
472 { action => 'PARAM', proto => 'tcp', dport => '587' },
473 ],
474 'Syslog' => [
475 "Syslog protocol (RFC 5424) traffic",
476 { action => 'PARAM', proto => 'udp', dport => '514' },
477 { action => 'PARAM', proto => 'tcp', dport => '514' },
478 ],
479 'TFTP' => [
480 "Trivial File Transfer Protocol traffic",
481 { action => 'PARAM', proto => 'udp', dport => '69' },
482 ],
483 'Telnet' => [
484 "Telnet traffic",
485 { action => 'PARAM', proto => 'tcp', dport => '23' },
486 ],
487 'Telnets' => [
488 "Telnet over SSL",
489 { action => 'PARAM', proto => 'tcp', dport => '992' },
490 ],
491 'Time' => [
492 "RFC 868 Time protocol",
493 { action => 'PARAM', proto => 'tcp', dport => '37' },
494 ],
495 'Trcrt' => [
496 "Traceroute (for up to 30 hops) traffic",
497 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
498 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
499 ],
500 'VNC' => [
501 "VNC traffic for VNC display's 0 - 99",
502 { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
503 ],
504 'VNCL' => [
505 "VNC traffic from Vncservers to Vncviewers in listen mode",
506 { action => 'PARAM', proto => 'tcp', dport => '5500' },
507 ],
508 'Web' => [
509 "WWW traffic (HTTP and HTTPS)",
510 { action => 'PARAM', proto => 'tcp', dport => '80' },
511 { action => 'PARAM', proto => 'tcp', dport => '443' },
512 ],
513 'Webcache' => [
514 "Web Cache/Proxy traffic (port 8080)",
515 { action => 'PARAM', proto => 'tcp', dport => '8080' },
516 ],
517 'Webmin' => [
518 "Webmin traffic",
519 { action => 'PARAM', proto => 'tcp', dport => '10000' },
520 ],
521 'Whois' => [
522 "Whois (nicname, RFC 3912) traffic",
523 { action => 'PARAM', proto => 'tcp', dport => '43' },
524 ],
525 };
526
527 my $pve_fw_parsed_macros;
528 my $pve_fw_macro_descr;
529 my $pve_fw_macro_ipversion = {};
530 my $pve_fw_preferred_macro_names = {};
531
532 my $FWACCEPTMARK_ON = "0x80000000/0x80000000";
533 my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
534
535 my $pve_std_chains = {};
536 $pve_std_chains->{4} = {
537 'PVEFW-SET-ACCEPT-MARK' => [
538 "-j MARK --set-mark $FWACCEPTMARK_ON",
539 ],
540 'PVEFW-DropBroadcast' => [
541 # same as shorewall 'Broadcast'
542 # simply DROP BROADCAST/MULTICAST/ANYCAST
543 # we can use this to reduce logging
544 { action => 'DROP', dsttype => 'BROADCAST' },
545 { action => 'DROP', dsttype => 'MULTICAST' },
546 { action => 'DROP', dsttype => 'ANYCAST' },
547 { action => 'DROP', dest => '224.0.0.0/4' },
548 ],
549 'PVEFW-reject' => [
550 # same as shorewall 'reject'
551 { action => 'DROP', dsttype => 'BROADCAST' },
552 { action => 'DROP', source => '224.0.0.0/4' },
553 { action => 'DROP', proto => 'icmp' },
554 "-p tcp -j REJECT --reject-with tcp-reset",
555 "-p udp -j REJECT --reject-with icmp-port-unreachable",
556 "-p icmp -j REJECT --reject-with icmp-host-unreachable",
557 "-j REJECT --reject-with icmp-host-prohibited",
558 ],
559 'PVEFW-Drop' => [
560 # same as shorewall 'Drop', which is equal to DROP,
561 # but REJECT/DROP some packages to reduce logging,
562 # and ACCEPT critical ICMP types
563 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
564 # we are not interested in BROADCAST/MULTICAST/ANYCAST
565 { action => 'PVEFW-DropBroadcast' },
566 # ACCEPT critical ICMP types
567 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
568 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
569 # Drop packets with INVALID state
570 "-m conntrack --ctstate INVALID -j DROP",
571 # Drop Microsoft SMB noise
572 { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
573 { action => 'DROP', proto => 'udp', dport => '137:139'},
574 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
575 { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
576 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
577 # Drop new/NotSyn traffic so that it doesn't get logged
578 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
579 # Drop DNS replies
580 { action => 'DROP', proto => 'udp', sport => 53 },
581 ],
582 'PVEFW-Reject' => [
583 # same as shorewall 'Reject', which is equal to Reject,
584 # but REJECT/DROP some packages to reduce logging,
585 # and ACCEPT critical ICMP types
586 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
587 # we are not interested in BROADCAST/MULTICAST/ANYCAST
588 { action => 'PVEFW-DropBroadcast' },
589 # ACCEPT critical ICMP types
590 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
591 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
592 # Drop packets with INVALID state
593 "-m conntrack --ctstate INVALID -j DROP",
594 # Drop Microsoft SMB noise
595 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
596 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
597 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
598 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
599 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
600 # Drop new/NotSyn traffic so that it doesn't get logged
601 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
602 # Drop DNS replies
603 { action => 'DROP', proto => 'udp', sport => 53 },
604 ],
605 'PVEFW-tcpflags' => [
606 # same as shorewall tcpflags action.
607 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
608 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
609 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
610 "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
611 "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
612 "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
613 ],
614 'PVEFW-smurfs' => [
615 # same as shorewall smurfs action
616 # Filter packets for smurfs (packets with a broadcast address as the source).
617 "-s 0.0.0.0/32 -j RETURN", # allow DHCP
618 "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
619 "-s 224.0.0.0/4 -g PVEFW-smurflog",
620 ],
621 };
622
623 $pve_std_chains->{6} = {
624 'PVEFW-SET-ACCEPT-MARK' => [
625 "-j MARK --set-mark $FWACCEPTMARK_ON",
626 ],
627 'PVEFW-DropBroadcast' => [
628 # same as shorewall 'Broadcast'
629 # simply DROP BROADCAST/MULTICAST/ANYCAST
630 # we can use this to reduce logging
631 #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
632 # ipv6 addrtype does not work with kernel 2.6.32
633 #{ action => 'DROP', dsttype => 'MULTICAST' },
634 #{ action => 'DROP', dsttype => 'ANYCAST' },
635 { action => 'DROP', dest => 'ff00::/8' },
636 #{ action => 'DROP', dest => '224.0.0.0/4' },
637 ],
638 'PVEFW-reject' => [
639 # same as shorewall 'reject'
640 #{ action => 'DROP', dsttype => 'BROADCAST' },
641 #{ action => 'DROP', source => '224.0.0.0/4' },
642 { action => 'DROP', proto => 'icmpv6' },
643 "-p tcp -j REJECT --reject-with tcp-reset",
644 #"-p udp -j REJECT --reject-with icmp-port-unreachable",
645 #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
646 #"-j REJECT --reject-with icmp-host-prohibited",
647 ],
648 'PVEFW-Drop' => [
649 # same as shorewall 'Drop', which is equal to DROP,
650 # but REJECT/DROP some packages to reduce logging,
651 # and ACCEPT critical ICMP types
652 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
653 # we are not interested in BROADCAST/MULTICAST/ANYCAST
654 { action => 'PVEFW-DropBroadcast' },
655 # ACCEPT critical ICMP types
656 { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
657 { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
658 { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
659
660 # Drop packets with INVALID state
661 "-m conntrack --ctstate INVALID -j DROP",
662 # Drop Microsoft SMB noise
663 { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
664 { action => 'DROP', proto => 'udp', dport => '137:139'},
665 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
666 { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
667 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
668 # Drop new/NotSyn traffic so that it doesn't get logged
669 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
670 # Drop DNS replies
671 { action => 'DROP', proto => 'udp', sport => 53 },
672 ],
673 'PVEFW-Reject' => [
674 # same as shorewall 'Reject', which is equal to Reject,
675 # but REJECT/DROP some packages to reduce logging,
676 # and ACCEPT critical ICMP types
677 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
678 # we are not interested in BROADCAST/MULTICAST/ANYCAST
679 { action => 'PVEFW-DropBroadcast' },
680 # ACCEPT critical ICMP types
681 { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
682 { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
683 { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
684
685 # Drop packets with INVALID state
686 "-m conntrack --ctstate INVALID -j DROP",
687 # Drop Microsoft SMB noise
688 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
689 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
690 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
691 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
692 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
693 # Drop new/NotSyn traffic so that it doesn't get logged
694 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
695 # Drop DNS replies
696 { action => 'DROP', proto => 'udp', sport => 53 },
697 ],
698 'PVEFW-tcpflags' => [
699 # same as shorewall tcpflags action.
700 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
701 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
702 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
703 "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
704 "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
705 "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
706 ],
707 };
708
709 # iptables -p icmp -h
710 my $icmp_type_names = {
711 any => 1,
712 'echo-reply' => 1,
713 'destination-unreachable' => 1,
714 'network-unreachable' => 1,
715 'host-unreachable' => 1,
716 'protocol-unreachable' => 1,
717 'port-unreachable' => 1,
718 'fragmentation-needed' => 1,
719 'source-route-failed' => 1,
720 'network-unknown' => 1,
721 'host-unknown' => 1,
722 'network-prohibited' => 1,
723 'host-prohibited' => 1,
724 'TOS-network-unreachable' => 1,
725 'TOS-host-unreachable' => 1,
726 'communication-prohibited' => 1,
727 'host-precedence-violation' => 1,
728 'precedence-cutoff' => 1,
729 'source-quench' => 1,
730 'redirect' => 1,
731 'network-redirect' => 1,
732 'host-redirect' => 1,
733 'TOS-network-redirect' => 1,
734 'TOS-host-redirect' => 1,
735 'echo-request' => 1,
736 'router-advertisement' => 1,
737 'router-solicitation' => 1,
738 'time-exceeded' => 1,
739 'ttl-zero-during-transit' => 1,
740 'ttl-zero-during-reassembly' => 1,
741 'parameter-problem' => 1,
742 'ip-header-bad' => 1,
743 'required-option-missing' => 1,
744 'timestamp-request' => 1,
745 'timestamp-reply' => 1,
746 'address-mask-request' => 1,
747 'address-mask-reply' => 1,
748 };
749
750 # ip6tables -p icmpv6 -h
751
752 my $icmpv6_type_names = {
753 'any' => 1,
754 'destination-unreachable' => 1,
755 'no-route' => 1,
756 'communication-prohibited' => 1,
757 'address-unreachable' => 1,
758 'port-unreachable' => 1,
759 'packet-too-big' => 1,
760 'time-exceeded' => 1,
761 'ttl-zero-during-transit' => 1,
762 'ttl-zero-during-reassembly' => 1,
763 'parameter-problem' => 1,
764 'bad-header' => 1,
765 'unknown-header-type' => 1,
766 'unknown-option' => 1,
767 'echo-request' => 1,
768 'echo-reply' => 1,
769 'router-solicitation' => 1,
770 'router-advertisement' => 1,
771 'neighbor-solicitation' => 1,
772 'neighbour-solicitation' => 1,
773 'neighbor-advertisement' => 1,
774 'neighbour-advertisement' => 1,
775 'redirect' => 1,
776 };
777
778 sub init_firewall_macros {
779
780 $pve_fw_parsed_macros = {};
781
782 my $parse = sub {
783 my ($k, $macro) = @_;
784 my $lc_name = lc($k);
785 $pve_fw_macro_ipversion->{$k} = 0;
786 while (!ref($macro->[0])) {
787 my $desc = shift @$macro;
788 if ($desc eq 'ipv4only') {
789 $pve_fw_macro_ipversion->{$k} = 4;
790 } elsif ($desc eq 'ipv6only') {
791 $pve_fw_macro_ipversion->{$k} = 6;
792 } else {
793 $pve_fw_macro_descr->{$k} = $desc;
794 }
795 }
796 $pve_fw_preferred_macro_names->{$lc_name} = $k;
797 $pve_fw_parsed_macros->{$k} = $macro;
798 };
799
800 foreach my $k (keys %$pve_fw_macros) {
801 &$parse($k, $pve_fw_macros->{$k});
802 }
803
804 foreach my $k (keys %$pve_ipv6fw_macros) {
805 next if $pve_fw_parsed_macros->{$k};
806 &$parse($k, $pve_ipv6fw_macros->{$k});
807 $pve_fw_macro_ipversion->{$k} = 6;
808 }
809 }
810
811 init_firewall_macros();
812
813 sub get_macros {
814 return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
815 }
816
817 my $etc_services;
818
819 sub get_etc_services {
820
821 return $etc_services if $etc_services;
822
823 my $filename = "/etc/services";
824
825 my $fh = IO::File->new($filename, O_RDONLY);
826 if (!$fh) {
827 warn "unable to read '$filename' - $!\n";
828 return {};
829 }
830
831 my $services = {};
832
833 while (my $line = <$fh>) {
834 chomp ($line);
835 next if $line =~m/^#/;
836 next if ($line =~m/^\s*$/);
837
838 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
839 $services->{byid}->{$2}->{name} = $1;
840 $services->{byid}->{$2}->{port} = $2;
841 $services->{byid}->{$2}->{$3} = 1;
842 $services->{byname}->{$1} = $services->{byid}->{$2};
843 }
844 }
845
846 close($fh);
847
848 $etc_services = $services;
849
850
851 return $etc_services;
852 }
853
854 my $etc_protocols;
855
856 sub get_etc_protocols {
857 return $etc_protocols if $etc_protocols;
858
859 my $filename = "/etc/protocols";
860
861 my $fh = IO::File->new($filename, O_RDONLY);
862 if (!$fh) {
863 warn "unable to read '$filename' - $!\n";
864 return {};
865 }
866
867 my $protocols = {};
868
869 while (my $line = <$fh>) {
870 chomp ($line);
871 next if $line =~m/^#/;
872 next if ($line =~m/^\s*$/);
873
874 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
875 $protocols->{byid}->{$2}->{name} = $1;
876 $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
877 }
878 }
879
880 close($fh);
881
882 # add special case for ICMP v6
883 $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
884 $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
885
886 $etc_protocols = $protocols;
887
888 return $etc_protocols;
889 }
890
891 my $__local_network;
892
893 sub local_network {
894 my ($new_value) = @_;
895
896 $__local_network = $new_value if defined($new_value);
897
898 return $__local_network if defined($__local_network);
899
900 eval {
901 my $nodename = PVE::INotify::nodename();
902
903 my $ip = PVE::Cluster::remote_node_ip($nodename);
904
905 my $testip = Net::IP->new($ip);
906
907 my $isv6 = $testip->version == 6;
908 my $routes = $isv6 ? PVE::ProcFSTools::read_proc_net_ipv6_route()
909 : PVE::ProcFSTools::read_proc_net_route();
910 foreach my $entry (@$routes) {
911 my $mask;
912 if ($isv6) {
913 $mask = $entry->{prefix};
914 next if !$mask; # skip the default route...
915 } else {
916 $mask = $PVE::Network::ipv4_mask_hash_localnet->{$entry->{mask}};
917 next if !defined($mask);
918 }
919 my $cidr = "$entry->{dest}/$mask";
920 my $testnet = Net::IP->new($cidr);
921 my $overlap = $testnet->overlaps($testip);
922 if ($overlap == $Net::IP::IP_B_IN_A_OVERLAP ||
923 $overlap == $Net::IP::IP_IDENTICAL)
924 {
925 $__local_network = $cidr;
926 return;
927 }
928 }
929 };
930 warn $@ if $@;
931
932 return $__local_network;
933 }
934
935 # ipset names are limited to 31 characters,
936 # and we use '-v4' or '-v6' to indicate IP versions,
937 # and we use '_swap' suffix for atomic update,
938 # for example PVEFW-${VMID}-${ipset_name}_swap
939
940 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
941
942 sub compute_ipset_chain_name {
943 my ($vmid, $ipset_name, $ipversion) = @_;
944
945 $vmid = 0 if !defined($vmid);
946
947 my $id = "$vmid-${ipset_name}-v$ipversion";
948
949 if (length($id) > $max_iptables_ipset_name_length) {
950 $id = PVE::Tools::fnv31a_hex($id);
951 }
952
953 return "PVEFW-$id";
954 }
955
956 sub compute_ipfilter_ipset_name {
957 my ($iface) = @_;
958
959 return "ipfilter-$iface";
960 }
961
962 sub parse_address_list {
963 my ($str) = @_;
964
965 if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
966 die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
967 return;
968 }
969
970 if ($str =~ m/^${ip_alias_pattern}$/) {
971 die "alias name too long\n" if length($str) > $max_alias_name_length;
972 return;
973 }
974
975 my $count = 0;
976 my $iprange = 0;
977 my $ipversion;
978
979 foreach my $elem (split(/,/, $str)) {
980 $count++;
981 my $ip = Net::IP->new($elem);
982 if (!$ip) {
983 my $err = Net::IP::Error();
984 die "invalid IP address: $err\n";
985 }
986 $iprange = 1 if $elem =~ m/-/;
987
988 my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
989
990 die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
991 if $ipversion && ($new_ipversion != $ipversion);
992
993 $ipversion = $new_ipversion;
994 }
995
996 die "you can't use a range in a list\n" if $iprange && $count > 1;
997
998 return $ipversion;
999 }
1000
1001 sub parse_port_name_number_or_range {
1002 my ($str, $dport) = @_;
1003
1004 my $services = PVE::Firewall::get_etc_services();
1005 my $count = 0;
1006 my $icmp_port = 0;
1007
1008 foreach my $item (split(/,/, $str)) {
1009 $count++;
1010 if ($item =~ m/^(\d+):(\d+)$/) {
1011 my ($port1, $port2) = ($1, $2);
1012 die "invalid port '$port1'\n" if $port1 > 65535;
1013 die "invalid port '$port2'\n" if $port2 > 65535;
1014 } elsif ($item =~ m/^(\d+)$/) {
1015 my $port = $1;
1016 die "invalid port '$port'\n" if $port > 65535;
1017 } else {
1018 if ($dport && $icmp_type_names->{$item}) {
1019 $icmp_port = 1;
1020 } elsif ($dport && $icmpv6_type_names->{$item}) {
1021 $icmp_port = 1;
1022 } else {
1023 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1024 }
1025 }
1026 }
1027
1028 die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
1029
1030 return $count;
1031 }
1032
1033 PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1034 sub pve_fw_verify_sport_spec {
1035 my ($portstr) = @_;
1036
1037 parse_port_name_number_or_range($portstr, 0);
1038
1039 return $portstr;
1040 }
1041
1042 PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1043 sub pve_fw_verify_dport_spec {
1044 my ($portstr) = @_;
1045
1046 parse_port_name_number_or_range($portstr, 1);
1047
1048 return $portstr;
1049 }
1050
1051 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1052 sub pve_fw_verify_addr_spec {
1053 my ($list) = @_;
1054
1055 parse_address_list($list);
1056
1057 return $list;
1058 }
1059
1060 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1061 sub pve_fw_verify_protocol_spec {
1062 my ($proto) = @_;
1063
1064 my $protocols = get_etc_protocols();
1065
1066 die "unknown protocol '$proto'\n" if $proto &&
1067 !(defined($protocols->{byname}->{$proto}) ||
1068 defined($protocols->{byid}->{$proto}));
1069
1070 return $proto;
1071 }
1072
1073
1074 # helper function for API
1075
1076 sub copy_opject_with_digest {
1077 my ($object) = @_;
1078
1079 my $sha = Digest::SHA->new('sha1');
1080
1081 my $res = {};
1082 foreach my $k (sort keys %$object) {
1083 my $v = $object->{$k};
1084 next if !defined($v);
1085 $res->{$k} = $v;
1086 $sha->add($k, ':', $v, "\n");
1087 }
1088
1089 my $digest = $sha->hexdigest;
1090
1091 $res->{digest} = $digest;
1092
1093 return wantarray ? ($res, $digest) : $res;
1094 }
1095
1096 sub copy_list_with_digest {
1097 my ($list) = @_;
1098
1099 my $sha = Digest::SHA->new('sha1');
1100
1101 my $res = [];
1102 foreach my $entry (@$list) {
1103 my $data = {};
1104 foreach my $k (sort keys %$entry) {
1105 my $v = $entry->{$k};
1106 next if !defined($v);
1107 $data->{$k} = $v;
1108 # Note: digest ignores refs ($rule->{errors})
1109 # since Digest::SHA expects a series of bytes,
1110 # we have to encode the value here to prevent errors when
1111 # using utf8 characters (eg. in comments)
1112 $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
1113 }
1114 push @$res, $data;
1115 }
1116
1117 my $digest = $sha->hexdigest;
1118
1119 foreach my $entry (@$res) {
1120 $entry->{digest} = $digest;
1121 }
1122
1123 return wantarray ? ($res, $digest) : $res;
1124 }
1125
1126 our $cluster_option_properties = {
1127 enable => {
1128 description => "Enable or disable the firewall cluster wide.",
1129 type => 'integer',
1130 minimum => 0,
1131 optional => 1,
1132 },
1133 policy_in => {
1134 description => "Input policy.",
1135 type => 'string',
1136 optional => 1,
1137 enum => ['ACCEPT', 'REJECT', 'DROP'],
1138 },
1139 policy_out => {
1140 description => "Output policy.",
1141 type => 'string',
1142 optional => 1,
1143 enum => ['ACCEPT', 'REJECT', 'DROP'],
1144 },
1145 };
1146
1147 our $host_option_properties = {
1148 enable => {
1149 description => "Enable host firewall rules.",
1150 type => 'boolean',
1151 optional => 1,
1152 },
1153 log_level_in => get_standard_option('pve-fw-loglevel', {
1154 description => "Log level for incoming traffic." }),
1155 log_level_out => get_standard_option('pve-fw-loglevel', {
1156 description => "Log level for outgoing traffic." }),
1157 tcp_flags_log_level => get_standard_option('pve-fw-loglevel', {
1158 description => "Log level for illegal tcp flags filter." }),
1159 smurf_log_level => get_standard_option('pve-fw-loglevel', {
1160 description => "Log level for SMURFS filter." }),
1161 nosmurfs => {
1162 description => "Enable SMURFS filter.",
1163 type => 'boolean',
1164 optional => 1,
1165 },
1166 tcpflags => {
1167 description => "Filter illegal combinations of TCP flags.",
1168 type => 'boolean',
1169 optional => 1,
1170 },
1171 nf_conntrack_max => {
1172 description => "Maximum number of tracked connections.",
1173 type => 'integer',
1174 optional => 1,
1175 minimum => 32768,
1176 },
1177 nf_conntrack_tcp_timeout_established => {
1178 description => "Conntrack established timeout.",
1179 type => 'integer',
1180 optional => 1,
1181 minimum => 7875,
1182 },
1183 ndp => {
1184 description => "Enable NDP.",
1185 type => 'boolean',
1186 optional => 1,
1187 },
1188 };
1189
1190 our $vm_option_properties = {
1191 enable => {
1192 description => "Enable/disable firewall rules.",
1193 type => 'boolean',
1194 optional => 1,
1195 },
1196 macfilter => {
1197 description => "Enable/disable MAC address filter.",
1198 type => 'boolean',
1199 optional => 1,
1200 },
1201 dhcp => {
1202 description => "Enable DHCP.",
1203 type => 'boolean',
1204 optional => 1,
1205 },
1206 ndp => {
1207 description => "Enable NDP.",
1208 type => 'boolean',
1209 optional => 1,
1210 },
1211 radv => {
1212 description => "Allow sending Router Advertisement.",
1213 type => 'boolean',
1214 optional => 1,
1215 },
1216 ipfilter => {
1217 description => "Enable default IP filters. " .
1218 "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1219 "for every interface. Such ipsets implicitly contain sane default " .
1220 "restrictions such as restricting IPv6 link local addresses to " .
1221 "the one derived from the interface's MAC address. For containers " .
1222 "the configured IP addresses will be implicitly added.",
1223 type => 'boolean',
1224 optional => 1,
1225 },
1226 policy_in => {
1227 description => "Input policy.",
1228 type => 'string',
1229 optional => 1,
1230 enum => ['ACCEPT', 'REJECT', 'DROP'],
1231 },
1232 policy_out => {
1233 description => "Output policy.",
1234 type => 'string',
1235 optional => 1,
1236 enum => ['ACCEPT', 'REJECT', 'DROP'],
1237 },
1238 log_level_in => get_standard_option('pve-fw-loglevel', {
1239 description => "Log level for incoming traffic." }),
1240 log_level_out => get_standard_option('pve-fw-loglevel', {
1241 description => "Log level for outgoing traffic." }),
1242
1243 };
1244
1245
1246 my $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.";
1247
1248 my $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.";
1249
1250 my $rule_properties = {
1251 pos => {
1252 description => "Update rule at position <pos>.",
1253 type => 'integer',
1254 minimum => 0,
1255 optional => 1,
1256 },
1257 digest => get_standard_option('pve-config-digest'),
1258 type => {
1259 description => "Rule type.",
1260 type => 'string',
1261 optional => 1,
1262 enum => ['in', 'out', 'group'],
1263 },
1264 action => {
1265 description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1266 type => 'string',
1267 optional => 1,
1268 pattern => $security_group_name_pattern,
1269 maxLength => 20,
1270 minLength => 2,
1271 },
1272 macro => {
1273 description => "Use predefined standard macro.",
1274 type => 'string',
1275 optional => 1,
1276 maxLength => 128,
1277 },
1278 iface => get_standard_option('pve-iface', {
1279 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.",
1280 optional => 1
1281 }),
1282 source => {
1283 description => "Restrict packet source address. $addr_list_descr",
1284 type => 'string', format => 'pve-fw-addr-spec',
1285 optional => 1,
1286 },
1287 dest => {
1288 description => "Restrict packet destination address. $addr_list_descr",
1289 type => 'string', format => 'pve-fw-addr-spec',
1290 optional => 1,
1291 },
1292 proto => {
1293 description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1294 type => 'string', format => 'pve-fw-protocol-spec',
1295 optional => 1,
1296 },
1297 enable => {
1298 description => "Flag to enable/disable a rule.",
1299 type => 'integer',
1300 minimum => 0,
1301 optional => 1,
1302 },
1303 sport => {
1304 description => "Restrict TCP/UDP source port. $port_descr",
1305 type => 'string', format => 'pve-fw-sport-spec',
1306 optional => 1,
1307 },
1308 dport => {
1309 description => "Restrict TCP/UDP destination port. $port_descr",
1310 type => 'string', format => 'pve-fw-dport-spec',
1311 optional => 1,
1312 },
1313 comment => {
1314 description => "Descriptive comment.",
1315 type => 'string',
1316 optional => 1,
1317 },
1318 };
1319
1320 sub add_rule_properties {
1321 my ($properties) = @_;
1322
1323 foreach my $k (keys %$rule_properties) {
1324 my $h = $rule_properties->{$k};
1325 # copy data, so that we can modify later without side effects
1326 foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1327 }
1328
1329 return $properties;
1330 }
1331
1332 sub delete_rule_properties {
1333 my ($rule, $delete_str) = @_;
1334
1335 foreach my $opt (PVE::Tools::split_list($delete_str)) {
1336 raise_param_exc({ 'delete' => "no such property ('$opt')"})
1337 if !defined($rule_properties->{$opt});
1338 raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1339 if $opt eq 'type' || $opt eq 'action';
1340 delete $rule->{$opt};
1341 }
1342
1343 return $rule;
1344 }
1345
1346 my $apply_macro = sub {
1347 my ($macro_name, $param, $verify, $ipversion) = @_;
1348
1349 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1350 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1351
1352 if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1353 $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1354 }
1355
1356 # skip macros which are specific to another ipversion
1357 if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1358 return if $ipversion != $required;
1359 }
1360
1361 my $rules = [];
1362
1363 foreach my $templ (@$macro_rules) {
1364 my $rule = {};
1365 my $param_used = {};
1366 foreach my $k (keys %$templ) {
1367 my $v = $templ->{$k};
1368 if ($v eq 'PARAM') {
1369 $v = $param->{$k};
1370 $param_used->{$k} = 1;
1371 } elsif ($v eq 'DEST') {
1372 $v = $param->{dest};
1373 $param_used->{dest} = 1;
1374 } elsif ($v eq 'SOURCE') {
1375 $v = $param->{source};
1376 $param_used->{source} = 1;
1377 }
1378
1379 if (!defined($v)) {
1380 my $msg = "missing parameter '$k' in macro '$macro_name'";
1381 raise_param_exc({ macro => $msg }) if $verify;
1382 die "$msg\n";
1383 }
1384 $rule->{$k} = $v;
1385 }
1386 foreach my $k (keys %$param) {
1387 next if $k eq 'macro';
1388 next if !defined($param->{$k});
1389 next if $param_used->{$k};
1390 if (defined($rule->{$k})) {
1391 if ($rule->{$k} ne $param->{$k}) {
1392 my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1393 raise_param_exc({ $k => $msg }) if $verify;
1394 die "$msg\n";
1395 }
1396 } else {
1397 $rule->{$k} = $param->{$k};
1398 }
1399 }
1400 push @$rules, $rule;
1401 }
1402
1403 return $rules;
1404 };
1405
1406 my $rule_env_iface_lookup = {
1407 'ct' => 1,
1408 'vm' => 1,
1409 'group' => 0,
1410 'cluster' => 1,
1411 'host' => 1,
1412 };
1413
1414 sub verify_rule {
1415 my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1416
1417 my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1418
1419 my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1420 die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1421
1422 my $errors = $rule->{errors} || {};
1423
1424 my $error_count = 0;
1425
1426 my $add_error = sub {
1427 my ($param, $msg) = @_;
1428 chomp $msg;
1429 raise_param_exc({ $param => $msg }) if !$noerr;
1430 $error_count++;
1431 $errors->{$param} = $msg if !$errors->{$param};
1432 };
1433
1434 my $ipversion;
1435 my $set_ip_version = sub {
1436 my $vers = shift;
1437 if ($vers) {
1438 die "detected mixed ipv4/ipv6 adresses in rule\n"
1439 if $ipversion && ($vers != $ipversion);
1440 $ipversion = $vers;
1441 }
1442 };
1443
1444 my $check_ipset_or_alias_property = sub {
1445 my ($name, $expected_ipversion) = @_;
1446
1447 if (my $value = $rule->{$name}) {
1448 if ($value =~ m/^\+/) {
1449 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1450 &$add_error($name, "no such ipset '$1'")
1451 if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1452
1453 } else {
1454 &$add_error($name, "invalid ipset name '$value'");
1455 }
1456 } elsif ($value =~ m/^${ip_alias_pattern}$/){
1457 my $alias = lc($value);
1458 &$add_error($name, "no such alias '$value'")
1459 if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1460 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1461 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1462
1463 &$set_ip_version($e->{ipversion});
1464 }
1465 }
1466 };
1467
1468 my $type = $rule->{type};
1469 my $action = $rule->{action};
1470
1471 &$add_error('type', "missing property") if !$type;
1472 &$add_error('action', "missing property") if !$action;
1473
1474 if ($type) {
1475 if ($type eq 'in' || $type eq 'out') {
1476 &$add_error('action', "unknown action '$action'")
1477 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1478 } elsif ($type eq 'group') {
1479 &$add_error('type', "security groups not allowed")
1480 if !$allow_groups;
1481 &$add_error('action', "invalid characters in security group name")
1482 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1483 } else {
1484 &$add_error('type', "unknown rule type '$type'");
1485 }
1486 }
1487
1488 if ($rule->{iface}) {
1489 &$add_error('type', "parameter -i not allowed for this rule type")
1490 if !$allow_iface;
1491 eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1492 &$add_error('iface', $@) if $@;
1493 if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1494 &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1495 if $rule->{iface} !~ m/^net(\d+)$/;
1496 }
1497 }
1498
1499 if ($rule->{macro}) {
1500 if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1501 $rule->{macro} = $preferred_name;
1502 } else {
1503 &$add_error('macro', "unknown macro '$rule->{macro}'");
1504 }
1505 }
1506
1507 if ($rule->{proto}) {
1508 eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1509 &$add_error('proto', $@) if $@;
1510 &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1511 &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1512 }
1513
1514 if ($rule->{dport}) {
1515 eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1516 &$add_error('dport', $@) if $@;
1517 my $proto = $rule->{proto};
1518 &$add_error('proto', "missing property - 'dport' requires this property")
1519 if !$proto;
1520 &$add_error('dport', "protocol '$proto' does not support ports")
1521 if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1522 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1523 }
1524
1525 if ($rule->{sport}) {
1526 eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1527 &$add_error('sport', $@) if $@;
1528 my $proto = $rule->{proto};
1529 &$add_error('proto', "missing property - 'sport' requires this property")
1530 if !$proto;
1531 &$add_error('sport', "protocol '$proto' does not support ports")
1532 if !$PROTOCOLS_WITH_PORTS->{$proto};
1533 }
1534
1535 if ($rule->{source}) {
1536 eval {
1537 my $source_ipversion = parse_address_list($rule->{source});
1538 &$set_ip_version($source_ipversion);
1539 };
1540 &$add_error('source', $@) if $@;
1541 &$check_ipset_or_alias_property('source', $ipversion);
1542 }
1543
1544 if ($rule->{dest}) {
1545 eval {
1546 my $dest_ipversion = parse_address_list($rule->{dest});
1547 &$set_ip_version($dest_ipversion);
1548 };
1549 &$add_error('dest', $@) if $@;
1550 &$check_ipset_or_alias_property('dest', $ipversion);
1551 }
1552
1553 $rule->{ipversion} = $ipversion if $ipversion;
1554
1555 if ($rule->{macro} && !$error_count) {
1556 eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1557 if (my $err = $@) {
1558 if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1559 my $eh = $err->{errors};
1560 foreach my $p (keys %$eh) {
1561 &$add_error($p, $eh->{$p});
1562 }
1563 } else {
1564 &$add_error('macro', "$err");
1565 }
1566 }
1567 }
1568
1569 $rule->{errors} = $errors if $error_count;
1570
1571 return $rule;
1572 }
1573
1574 sub copy_rule_data {
1575 my ($rule, $param) = @_;
1576
1577 foreach my $k (keys %$rule_properties) {
1578 if (defined(my $v = $param->{$k})) {
1579 if ($v eq '' || $v eq '-') {
1580 delete $rule->{$k};
1581 } else {
1582 $rule->{$k} = $v;
1583 }
1584 }
1585 }
1586
1587 return $rule;
1588 }
1589
1590 sub rules_modify_permissions {
1591 my ($rule_env) = @_;
1592
1593 if ($rule_env eq 'host') {
1594 return {
1595 check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1596 };
1597 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1598 return {
1599 check => ['perm', '/', [ 'Sys.Modify' ]],
1600 };
1601 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1602 return {
1603 check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1604 }
1605 }
1606
1607 return undef;
1608 }
1609
1610 sub rules_audit_permissions {
1611 my ($rule_env) = @_;
1612
1613 if ($rule_env eq 'host') {
1614 return {
1615 check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1616 };
1617 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1618 return {
1619 check => ['perm', '/', [ 'Sys.Audit' ]],
1620 };
1621 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1622 return {
1623 check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1624 }
1625 }
1626
1627 return undef;
1628 }
1629
1630 # core functions
1631 my $bridge_firewall_enabled = 0;
1632
1633 sub enable_bridge_firewall {
1634
1635 return if $bridge_firewall_enabled; # only once
1636
1637 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1638 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1639
1640 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1641 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1642
1643 $bridge_firewall_enabled = 1;
1644 }
1645
1646 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1647
1648 sub iptables_restore_cmdlist {
1649 my ($cmdlist) = @_;
1650
1651 run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1652 }
1653
1654 sub ip6tables_restore_cmdlist {
1655 my ($cmdlist) = @_;
1656
1657 run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1658 }
1659
1660 sub ipset_restore_cmdlist {
1661 my ($cmdlist) = @_;
1662
1663 run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1664 }
1665
1666 sub iptables_get_chains {
1667 my ($iptablescmd) = @_;
1668
1669 $iptablescmd = "iptables" if !$iptablescmd;
1670
1671 my $res = {};
1672
1673 # check what chains we want to track
1674 my $is_pvefw_chain = sub {
1675 my $name = shift;
1676
1677 return 1 if $name =~ m/^PVEFW-\S+$/;
1678
1679 return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1680
1681 return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1682
1683 return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1684 return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1685
1686 return undef;
1687 };
1688
1689 my $table = '';
1690
1691 my $hooks = {};
1692
1693 my $parser = sub {
1694 my $line = shift;
1695
1696 return if $line =~ m/^#/;
1697 return if $line =~ m/^\s*$/;
1698
1699 if ($line =~ m/^\*(\S+)$/) {
1700 $table = $1;
1701 return;
1702 }
1703
1704 return if $table ne 'filter';
1705
1706 if ($line =~ m/^:(\S+)\s/) {
1707 my $chain = $1;
1708 return if !&$is_pvefw_chain($chain);
1709 $res->{$chain} = "unknown";
1710 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1711 my ($chain, $sig) = ($1, $2);
1712 return if !&$is_pvefw_chain($chain);
1713 $res->{$chain} = $sig;
1714 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1715 $hooks->{$1} = 1;
1716 } else {
1717 # simply ignore the rest
1718 return;
1719 }
1720 };
1721
1722 run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1723
1724 return wantarray ? ($res, $hooks) : $res;
1725 }
1726
1727 sub iptables_chain_digest {
1728 my ($rules) = @_;
1729 my $digest = Digest::SHA->new('sha1');
1730 foreach my $rule (@$rules) { # order is important
1731 $digest->add($rule);
1732 }
1733 return $digest->b64digest;
1734 }
1735
1736 sub ipset_chain_digest {
1737 my ($rules) = @_;
1738
1739 my $digest = Digest::SHA->new('sha1');
1740 foreach my $rule (sort @$rules) { # note: sorted
1741 $digest->add($rule);
1742 }
1743 return $digest->b64digest;
1744 }
1745
1746 sub ipset_get_chains {
1747
1748 my $res = {};
1749 my $chains = {};
1750
1751 my $parser = sub {
1752 my $line = shift;
1753
1754 return if $line =~ m/^#/;
1755 return if $line =~ m/^\s*$/;
1756 if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1757 my $chain = $1;
1758 $line =~ s/\s+$//; # delete trailing white space
1759 push @{$chains->{$chain}}, $line;
1760 } else {
1761 # simply ignore the rest
1762 return;
1763 }
1764 };
1765
1766 run_command("/sbin/ipset save", outfunc => $parser);
1767
1768 # compute digest for each chain
1769 foreach my $chain (keys %$chains) {
1770 $res->{$chain} = ipset_chain_digest($chains->{$chain});
1771 }
1772
1773 return $res;
1774 }
1775
1776 sub ruleset_generate_cmdstr {
1777 my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1778
1779 return if defined($rule->{enable}) && !$rule->{enable};
1780 return if $rule->{errors};
1781
1782 die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1783
1784 my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}, 1) : 0;
1785 my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}, 0) : 0;
1786
1787 my @cmd = ();
1788
1789 push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1790 push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1791
1792 my $source = $rule->{source};
1793 my $dest = $rule->{dest};
1794
1795 if ($source) {
1796 if ($source =~ m/^\+/) {
1797 if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1798 my $name = $1;
1799 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1800 my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1801 push @cmd, "-m set --match-set ${ipset_chain} src";
1802 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1803 my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1804 push @cmd, "-m set --match-set ${ipset_chain} src";
1805 } else {
1806 die "no such ipset '$name'\n";
1807 }
1808 } else {
1809 die "invalid security group name '$source'\n";
1810 }
1811 } elsif ($source =~ m/^${ip_alias_pattern}$/){
1812 my $alias = lc($source);
1813 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1814 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1815 die "no such alias '$source'\n" if !$e;
1816 push @cmd, "-s $e->{cidr}";
1817 } elsif ($source =~ m/\-/){
1818 push @cmd, "-m iprange --src-range $source";
1819 } else {
1820 push @cmd, "-s $source";
1821 }
1822 }
1823
1824 if ($dest) {
1825 if ($dest =~ m/^\+/) {
1826 if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1827 my $name = $1;
1828 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1829 my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1830 push @cmd, "-m set --match-set ${ipset_chain} dst";
1831 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1832 my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1833 push @cmd, "-m set --match-set ${ipset_chain} dst";
1834 } else {
1835 die "no such ipset '$name'\n";
1836 }
1837 } else {
1838 die "invalid security group name '$dest'\n";
1839 }
1840 } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1841 my $alias = lc($dest);
1842 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1843 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1844 die "no such alias '$dest'\n" if !$e;
1845 push @cmd, "-d $e->{cidr}";
1846 } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1847 push @cmd, "-m iprange --dst-range $dest";
1848 } else {
1849 push @cmd, "-d $dest";
1850 }
1851 }
1852
1853 if (my $proto = $rule->{proto}) {
1854 push @cmd, "-p $proto";
1855
1856 my $multiport = 0;
1857 $multiport++ if $nbdport > 1;
1858 $multiport++ if $nbsport > 1;
1859
1860 push @cmd, "--match multiport" if $multiport;
1861
1862 die "multiport: option '--sports' cannot be used together with '--dports'\n"
1863 if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1864
1865 if ($rule->{dport}) {
1866 if ($proto eq 'icmp') {
1867 # Note: we use dport to store --icmp-type
1868 die "unknown icmp-type '$rule->{dport}'\n"
1869 if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
1870 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1871 } elsif ($proto eq 'icmpv6') {
1872 # Note: we use dport to store --icmpv6-type
1873 die "unknown icmpv6-type '$rule->{dport}'\n"
1874 if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
1875 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1876 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
1877 die "protocol $proto does not have ports\n";
1878 } else {
1879 if ($nbdport > 1) {
1880 if ($multiport == 2) {
1881 push @cmd, "--ports $rule->{dport}";
1882 } else {
1883 push @cmd, "--dports $rule->{dport}";
1884 }
1885 } else {
1886 push @cmd, "--dport $rule->{dport}";
1887 }
1888 }
1889 }
1890
1891 if ($rule->{sport}) {
1892 die "protocol $proto does not have ports\n"
1893 if !$PROTOCOLS_WITH_PORTS->{$proto};
1894 if ($nbsport > 1) {
1895 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1896 } else {
1897 push @cmd, "--sport $rule->{sport}";
1898 }
1899 }
1900 } elsif ($rule->{dport} || $rule->{sport}) {
1901 die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1902 die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1903 }
1904
1905 push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1906
1907 if (my $action = $rule->{action}) {
1908 $action = $actions->{$action} if defined($actions->{$action});
1909 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1910 push @cmd, $goto ? "-g $action" : "-j $action";
1911 }
1912
1913 return scalar(@cmd) ? join(' ', @cmd) : undef;
1914 }
1915
1916 sub ruleset_generate_rule {
1917 my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1918
1919 my $rules;
1920
1921 if ($rule->{macro}) {
1922 $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
1923 } else {
1924 $rules = [ $rule ];
1925 }
1926
1927 # update all or nothing
1928
1929 my @cmds = ();
1930 foreach my $tmp (@$rules) {
1931 if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1932 push @cmds, $cmdstr;
1933 }
1934 }
1935
1936 foreach my $cmdstr (@cmds) {
1937 ruleset_addrule($ruleset, $chain, $cmdstr);
1938 }
1939 }
1940
1941 sub ruleset_generate_rule_insert {
1942 my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
1943
1944 die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1945
1946 if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $rule, $actions, $goto)) {
1947 ruleset_insertrule($ruleset, $chain, $cmdstr);
1948 }
1949 }
1950
1951 sub ruleset_create_chain {
1952 my ($ruleset, $chain) = @_;
1953
1954 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1955 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1956
1957 die "chain '$chain' already exists\n" if $ruleset->{$chain};
1958
1959 $ruleset->{$chain} = [];
1960 }
1961
1962 sub ruleset_chain_exist {
1963 my ($ruleset, $chain) = @_;
1964
1965 return $ruleset->{$chain} ? 1 : undef;
1966 }
1967
1968 sub ruleset_addrule {
1969 my ($ruleset, $chain, $rule) = @_;
1970
1971 die "no such chain '$chain'\n" if !$ruleset->{$chain};
1972
1973 push @{$ruleset->{$chain}}, "-A $chain $rule";
1974 }
1975
1976 sub ruleset_insertrule {
1977 my ($ruleset, $chain, $rule) = @_;
1978
1979 die "no such chain '$chain'\n" if !$ruleset->{$chain};
1980
1981 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1982 }
1983
1984 sub get_log_rule_base {
1985 my ($chain, $vmid, $msg, $loglevel) = @_;
1986
1987 die "internal error - no log level" if !defined($loglevel);
1988
1989 $vmid = 0 if !defined($vmid);
1990
1991 # Note: we use special format for prefix to pass further
1992 # info to log daemon (VMID, LOGVELEL and CHAIN)
1993
1994 return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1995 }
1996
1997 sub ruleset_addlog {
1998 my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1999
2000 return if !defined($loglevel);
2001
2002 my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
2003
2004 $logrule = "$rule $logrule" if defined($rule);
2005
2006 ruleset_addrule($ruleset, $chain, $logrule);
2007 }
2008
2009 sub ruleset_add_chain_policy {
2010 my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2011
2012 if ($policy eq 'ACCEPT') {
2013
2014 ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
2015 { ACCEPT => $accept_action});
2016
2017 } elsif ($policy eq 'DROP') {
2018
2019 ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
2020
2021 ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
2022
2023 ruleset_addrule($ruleset, $chain, "-j DROP");
2024 } elsif ($policy eq 'REJECT') {
2025 ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
2026
2027 ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
2028
2029 ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
2030 } else {
2031 # should not happen
2032 die "internal error: unknown policy '$policy'";
2033 }
2034 }
2035
2036 sub ruleset_chain_add_ndp {
2037 my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2038 return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2039
2040 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation $accept");
2041 if ($direction ne 'OUT' || $options->{radv}) {
2042 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement $accept");
2043 }
2044 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation $accept");
2045 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement $accept");
2046 }
2047
2048 sub ruleset_chain_add_conn_filters {
2049 my ($ruleset, $chain, $accept) = @_;
2050
2051 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
2052 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
2053 }
2054
2055 sub ruleset_chain_add_input_filters {
2056 my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2057
2058 if ($cluster_conf->{ipset}->{blacklist}){
2059 if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2060 ruleset_create_chain($ruleset, "PVEFW-blacklist");
2061 ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
2062 ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
2063 }
2064 my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2065 ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
2066 }
2067
2068 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2069 if ($ipversion == 4) {
2070 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
2071 }
2072 }
2073
2074 if ($options->{tcpflags}) {
2075 ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
2076 }
2077 }
2078
2079 sub ruleset_create_vm_chain {
2080 my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2081
2082 ruleset_create_chain($ruleset, $chain);
2083 my $accept = generate_nfqueue($options);
2084
2085 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2086 if ($ipversion == 4) {
2087 if ($direction eq 'OUT') {
2088 ruleset_generate_rule($ruleset, $chain, $ipversion,
2089 { action => 'PVEFW-SET-ACCEPT-MARK',
2090 proto => 'udp', sport => 68, dport => 67 });
2091 } else {
2092 ruleset_generate_rule($ruleset, $chain, $ipversion,
2093 { action => 'ACCEPT',
2094 proto => 'udp', sport => 67, dport => 68 });
2095 }
2096 } elsif ($ipversion == 6) {
2097 if ($direction eq 'OUT') {
2098 ruleset_generate_rule($ruleset, $chain, $ipversion,
2099 { action => 'PVEFW-SET-ACCEPT-MARK',
2100 proto => 'udp', sport => 546, dport => 547 });
2101 } else {
2102 ruleset_generate_rule($ruleset, $chain, $ipversion,
2103 { action => 'ACCEPT',
2104 proto => 'udp', sport => 547, dport => 546 });
2105 }
2106 }
2107
2108 }
2109
2110 if ($direction eq 'OUT') {
2111 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2112 ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
2113 }
2114 if ($ipversion == 6 && !$options->{radv}) {
2115 ruleset_addrule($ruleset, $chain, '-p icmpv6 --icmpv6-type router-advertisement -j DROP');
2116 }
2117 if ($ipfilter_ipset) {
2118 ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
2119 }
2120 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2121 }
2122
2123 my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2124 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2125 }
2126
2127 sub ruleset_add_group_rule {
2128 my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2129
2130 my $group = $rule->{action};
2131 my $group_chain = "GROUP-$group-$direction";
2132 if(!ruleset_chain_exist($ruleset, $group_chain)){
2133 generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2134 }
2135
2136 if ($direction eq 'OUT' && $rule->{iface_out}) {
2137 ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
2138 } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2139 ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
2140 } else {
2141 ruleset_addrule($ruleset, $chain, "-j $group_chain");
2142 }
2143
2144 ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON -j $action");
2145 }
2146
2147 sub ruleset_generate_vm_rules {
2148 my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
2149
2150 my $lc_direction = lc($direction);
2151
2152 my $in_accept = generate_nfqueue($options);
2153
2154 foreach my $rule (@$rules) {
2155 next if $rule->{iface} && $rule->{iface} ne $netid;
2156 next if !$rule->{enable} || $rule->{errors};
2157 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2158
2159 if ($rule->{type} eq 'group') {
2160 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2161 $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2162 } else {
2163 next if $rule->{type} ne $lc_direction;
2164 eval {
2165 if ($direction eq 'OUT') {
2166 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2167 { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2168 undef, $cluster_conf, $vmfw_conf);
2169 } else {
2170 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2171 { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
2172 undef, $cluster_conf, $vmfw_conf);
2173 }
2174 };
2175 warn $@ if $@;
2176 }
2177 }
2178 }
2179
2180 sub generate_nfqueue {
2181 my ($options) = @_;
2182
2183 if ($options->{ips}) {
2184 my $action = "NFQUEUE";
2185 if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2186 if (defined($3) && defined($1)) {
2187 $action .= " --queue-balance $1:$3";
2188 } elsif (defined($1)) {
2189 $action .= " --queue-num $1";
2190 }
2191 }
2192 $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2193 return $action;
2194 } else {
2195 return "ACCEPT";
2196 }
2197 }
2198
2199 sub ruleset_generate_vm_ipsrules {
2200 my ($ruleset, $options, $direction, $iface) = @_;
2201
2202 if ($options->{ips} && $direction eq 'IN') {
2203 my $nfqueue = generate_nfqueue($options);
2204
2205 if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2206 ruleset_create_chain($ruleset, "PVEFW-IPS");
2207 }
2208
2209 ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
2210 }
2211 }
2212
2213 sub generate_tap_rules_direction {
2214 my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2215
2216 my $lc_direction = lc($direction);
2217
2218 my $rules = $vmfw_conf->{rules};
2219
2220 my $options = $vmfw_conf->{options};
2221 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2222
2223 my $tapchain = "$iface-$direction";
2224
2225 my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2226 my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2227 if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2228
2229 # create chain with mac and ip filter
2230 ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2231
2232 if ($options->{enable}) {
2233 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2234
2235 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2236
2237 # implement policy
2238 my $policy;
2239
2240 if ($direction eq 'OUT') {
2241 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2242 } else {
2243 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2244 }
2245
2246 my $accept = generate_nfqueue($options);
2247 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2248 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2249 } else {
2250 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2251 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2252 }
2253
2254 # plug the tap chain to bridge chain
2255 if ($direction eq 'IN') {
2256 ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2257 "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
2258 } else {
2259 ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2260 "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
2261 }
2262 }
2263
2264 sub enable_host_firewall {
2265 my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2266
2267 my $options = $hostfw_conf->{options};
2268 my $cluster_options = $cluster_conf->{options};
2269 my $rules = $hostfw_conf->{rules};
2270 my $cluster_rules = $cluster_conf->{rules};
2271
2272 # host inbound firewall
2273 my $chain = "PVEFW-HOST-IN";
2274 ruleset_create_chain($ruleset, $chain);
2275
2276 my $loglevel = get_option_log_level($options, "log_level_in");
2277
2278 ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
2279
2280 ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2281 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2282 ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2283
2284 # we use RETURN because we need to check also tap rules
2285 my $accept_action = 'RETURN';
2286
2287 ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2288
2289 # add host rules first, so that cluster wide rules can be overwritten
2290 foreach my $rule (@$rules, @$cluster_rules) {
2291 next if !$rule->{enable} || $rule->{errors};
2292 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2293
2294 $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2295
2296 eval {
2297 if ($rule->{type} eq 'group') {
2298 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2299 } elsif ($rule->{type} eq 'in') {
2300 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2301 { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2302 undef, $cluster_conf, $hostfw_conf);
2303 }
2304 };
2305 warn $@ if $@;
2306 delete $rule->{iface_in};
2307 }
2308
2309 # allow standard traffic for management ipset (includes cluster network)
2310 my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2311 my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2312 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action"); # PVE API
2313 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action"); # PVE VNC Console
2314 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action"); # SPICE Proxy
2315 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action"); # SSH
2316
2317 my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2318 my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2319
2320 # corosync
2321 if ($localnet && ($ipversion == $localnet_ver)) {
2322 my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2323 ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
2324 ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
2325 }
2326
2327 # implement input policy
2328 my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2329 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2330
2331 # host outbound firewall
2332 $chain = "PVEFW-HOST-OUT";
2333 ruleset_create_chain($ruleset, $chain);
2334
2335 $loglevel = get_option_log_level($options, "log_level_out");
2336
2337 ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
2338
2339 ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2340
2341 # we use RETURN because we may want to check other thigs later
2342 $accept_action = 'RETURN';
2343 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2344
2345 ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2346
2347 # add host rules first, so that cluster wide rules can be overwritten
2348 foreach my $rule (@$rules, @$cluster_rules) {
2349 next if !$rule->{enable} || $rule->{errors};
2350 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2351
2352 $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2353 eval {
2354 if ($rule->{type} eq 'group') {
2355 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2356 } elsif ($rule->{type} eq 'out') {
2357 ruleset_generate_rule($ruleset, $chain, $ipversion,
2358 $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2359 undef, $cluster_conf, $hostfw_conf);
2360 }
2361 };
2362 warn $@ if $@;
2363 delete $rule->{iface_out};
2364 }
2365
2366 # allow standard traffic on cluster network
2367 if ($localnet && ($ipversion == $localnet_ver)) {
2368 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action"); # PVE API
2369 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action"); # SSH
2370 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action"); # PVE VNC Console
2371 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action"); # SPICE Proxy
2372
2373 my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2374 ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
2375 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
2376 }
2377
2378 # implement output policy
2379 $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2380 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2381
2382 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2383 ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2384 }
2385
2386 sub generate_group_rules {
2387 my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2388
2389 my $rules = $cluster_conf->{groups}->{$group};
2390
2391 if (!$rules) {
2392 warn "no such security group '$group'\n";
2393 $rules = []; # create empty chain
2394 }
2395
2396 my $chain = "GROUP-${group}-IN";
2397
2398 ruleset_create_chain($ruleset, $chain);
2399 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2400
2401 foreach my $rule (@$rules) {
2402 next if $rule->{type} ne 'in';
2403 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2404 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2405 { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2406 undef, $cluster_conf);
2407 }
2408
2409 $chain = "GROUP-${group}-OUT";
2410
2411 ruleset_create_chain($ruleset, $chain);
2412 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2413
2414 foreach my $rule (@$rules) {
2415 next if $rule->{type} ne 'out';
2416 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2417 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2418 # check also other tap rules later
2419 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2420 { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2421 undef, $cluster_conf);
2422 }
2423 }
2424
2425 my $MAX_NETS = 32;
2426 my $valid_netdev_names = {};
2427 for (my $i = 0; $i < $MAX_NETS; $i++) {
2428 $valid_netdev_names->{"net$i"} = 1;
2429 }
2430
2431 sub get_mark_values {
2432 my ($value, $mask) = @_;
2433 $value = hex($value) if $value =~ /^0x/;
2434 $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2435 $mask = 0xffffffff if !defined($mask);
2436 return ($value, $mask);
2437 }
2438
2439 sub parse_fw_rule {
2440 my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2441
2442 my $orig_line = $line;
2443
2444 my $rule = {};
2445
2446 # we can add single line comments to the end of the rule
2447 if ($line =~ s/#\s*(.*?)\s*$//) {
2448 $rule->{comment} = decode('utf8', $1);
2449 }
2450
2451 # we can disable a rule when prefixed with '|'
2452
2453 $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2454
2455 $line =~ s/^(\S+)\s+(\S+)\s*// ||
2456 die "unable to parse rule: $line\n";
2457
2458 $rule->{type} = lc($1);
2459 $rule->{action} = $2;
2460
2461 if ($rule->{type} eq 'in' || $rule->{type} eq 'out') {
2462 if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2463 $rule->{macro} = $1;
2464 $rule->{action} = $2;
2465 }
2466 }
2467
2468 while (length($line)) {
2469 if ($line =~ s/^-i (\S+)\s*//) {
2470 $rule->{iface} = $1;
2471 next;
2472 }
2473
2474 last if $rule->{type} eq 'group';
2475
2476 if ($line =~ s/^-p (\S+)\s*//) {
2477 $rule->{proto} = $1;
2478 next;
2479 }
2480
2481 if ($line =~ s/^-dport (\S+)\s*//) {
2482 $rule->{dport} = $1;
2483 next;
2484 }
2485
2486 if ($line =~ s/^-sport (\S+)\s*//) {
2487 $rule->{sport} = $1;
2488 next;
2489 }
2490 if ($line =~ s/^-source (\S+)\s*//) {
2491 $rule->{source} = $1;
2492 next;
2493 }
2494 if ($line =~ s/^-dest (\S+)\s*//) {
2495 $rule->{dest} = $1;
2496 next;
2497 }
2498
2499 last;
2500 }
2501
2502 die "unable to parse rule parameters: $line\n" if length($line);
2503
2504 $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2505 if ($verbose && $rule->{errors}) {
2506 warn "$prefix - errors in rule parameters: $orig_line\n";
2507 foreach my $p (keys %{$rule->{errors}}) {
2508 warn " $p: $rule->{errors}->{$p}\n";
2509 }
2510 }
2511
2512 return $rule;
2513 }
2514
2515 sub parse_vmfw_option {
2516 my ($line) = @_;
2517
2518 my ($opt, $value);
2519
2520 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2521
2522 if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2523 $opt = lc($1);
2524 $value = int($2);
2525 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2526 $opt = lc($1);
2527 $value = $2 ? lc($3) : '';
2528 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2529 $opt = lc($1);
2530 $value = uc($3);
2531 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2532 $opt = lc($1);
2533 $value = $2;
2534 } else {
2535 die "can't parse option '$line'\n"
2536 }
2537
2538 return ($opt, $value);
2539 }
2540
2541 sub parse_hostfw_option {
2542 my ($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|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
2549 $opt = lc($1);
2550 $value = int($2);
2551 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2552 $opt = lc($1);
2553 $value = $2 ? lc($3) : '';
2554 } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2555 $opt = lc($1);
2556 $value = int($2);
2557 } else {
2558 die "can't parse option '$line'\n"
2559 }
2560
2561 return ($opt, $value);
2562 }
2563
2564 sub parse_clusterfw_option {
2565 my ($line) = @_;
2566
2567 my ($opt, $value);
2568
2569 if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2570 $opt = lc($1);
2571 $value = int($2);
2572 if (($value > 1) && ((time() - $value) > 60)) {
2573 $value = 0
2574 }
2575 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2576 $opt = lc($1);
2577 $value = uc($3);
2578 } else {
2579 die "can't parse option '$line'\n"
2580 }
2581
2582 return ($opt, $value);
2583 }
2584
2585 sub resolve_alias {
2586 my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2587
2588 my $alias = lc($cidr);
2589 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2590 $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2591
2592 die "no such alias '$cidr'\n" if !$e;;
2593
2594 return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2595 }
2596
2597 sub parse_ip_or_cidr {
2598 my ($cidr) = @_;
2599
2600 my $ipversion;
2601
2602 if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2603 $cidr =~ s|/128$||;
2604 $ipversion = 6;
2605 } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2606 $cidr =~ s|/32$||;
2607 $ipversion = 4;
2608 } else {
2609 die "value does not look like a valid IP address or CIDR network\n";
2610 }
2611
2612 return wantarray ? ($cidr, $ipversion) : $cidr;
2613 }
2614
2615 sub parse_alias {
2616 my ($line) = @_;
2617
2618 # we can add single line comments to the end of the line
2619 my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2620
2621 if ($line =~ m/^(\S+)\s(\S+)$/) {
2622 my ($name, $cidr) = ($1, $2);
2623 my $ipversion;
2624
2625 ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2626
2627 my $data = {
2628 name => $name,
2629 cidr => $cidr,
2630 ipversion => $ipversion,
2631 };
2632 $data->{comment} = $comment if $comment;
2633 return $data;
2634 }
2635
2636 return undef;
2637 }
2638
2639 sub generic_fw_config_parser {
2640 my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2641
2642 my $section;
2643 my $group;
2644
2645 my $res = $empty_conf;
2646
2647 while (defined(my $line = <$fh>)) {
2648 next if $line =~ m/^#/;
2649 next if $line =~ m/^\s*$/;
2650
2651 chomp $line;
2652
2653 my $linenr = $fh->input_line_number();
2654 my $prefix = "$filename (line $linenr)";
2655
2656 if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2657 $section = 'options';
2658 next;
2659 }
2660
2661 if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2662 $section = 'aliases';
2663 next;
2664 }
2665
2666 if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2667 $section = 'groups';
2668 $group = lc($1);
2669 my $comment = $2;
2670 eval {
2671 die "security group name too long\n" if length($group) > $max_group_name_length;
2672 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2673 };
2674 if (my $err = $@) {
2675 ($section, $group, $comment) = undef;
2676 warn "$prefix: $err";
2677 next;
2678 }
2679
2680 $res->{$section}->{$group} = [];
2681 $res->{group_comments}->{$group} = decode('utf8', $comment)
2682 if $comment;
2683 next;
2684 }
2685
2686 if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2687 $section = 'rules';
2688 next;
2689 }
2690
2691 if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2692 $section = 'ipset';
2693 $group = lc($1);
2694 my $comment = $2;
2695 eval {
2696 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2697 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2698 };
2699 if (my $err = $@) {
2700 ($section, $group, $comment) = undef;
2701 warn "$prefix: $err";
2702 next;
2703 }
2704
2705 $res->{$section}->{$group} = [];
2706 $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2707 if $comment;
2708 next;
2709 }
2710
2711 if (!$section) {
2712 warn "$prefix: skip line - no section\n";
2713 next;
2714 }
2715
2716 if ($section eq 'options') {
2717 eval {
2718 my ($opt, $value);
2719 if ($rule_env eq 'cluster') {
2720 ($opt, $value) = parse_clusterfw_option($line);
2721 } elsif ($rule_env eq 'host') {
2722 ($opt, $value) = parse_hostfw_option($line);
2723 } else {
2724 ($opt, $value) = parse_vmfw_option($line);
2725 }
2726 $res->{options}->{$opt} = $value;
2727 };
2728 warn "$prefix: $@" if $@;
2729 } elsif ($section eq 'aliases') {
2730 eval {
2731 my $data = parse_alias($line);
2732 $res->{aliases}->{lc($data->{name})} = $data;
2733 };
2734 warn "$prefix: $@" if $@;
2735 } elsif ($section eq 'rules') {
2736 my $rule;
2737 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2738 if (my $err = $@) {
2739 warn "$prefix: $err";
2740 next;
2741 }
2742 push @{$res->{$section}}, $rule;
2743 } elsif ($section eq 'groups') {
2744 my $rule;
2745 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2746 if (my $err = $@) {
2747 warn "$prefix: $err";
2748 next;
2749 }
2750 push @{$res->{$section}->{$group}}, $rule;
2751 } elsif ($section eq 'ipset') {
2752 # we can add single line comments to the end of the rule
2753 my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2754
2755 $line =~ m/^(\!)?\s*(\S+)\s*$/;
2756 my $nomatch = $1;
2757 my $cidr = $2;
2758 my $errors;
2759
2760 if ($nomatch && !$feature_ipset_nomatch) {
2761 $errors->{nomatch} = "nomatch not supported by kernel";
2762 }
2763
2764 eval {
2765 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2766 resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2767 } else {
2768 $cidr = parse_ip_or_cidr($cidr);
2769 }
2770 };
2771 if (my $err = $@) {
2772 chomp $err;
2773 $errors->{cidr} = $err;
2774 }
2775
2776 my $entry = { cidr => $cidr };
2777 $entry->{nomatch} = 1 if $nomatch;
2778 $entry->{comment} = $comment if $comment;
2779 $entry->{errors} = $errors if $errors;
2780
2781 if ($verbose && $errors) {
2782 warn "$prefix - errors in ipset '$group': $line\n";
2783 foreach my $p (keys %{$errors}) {
2784 warn " $p: $errors->{$p}\n";
2785 }
2786 }
2787
2788 push @{$res->{$section}->{$group}}, $entry;
2789 } else {
2790 warn "$prefix: skip line - unknown section\n";
2791 next;
2792 }
2793 }
2794
2795 return $res;
2796 }
2797
2798 sub parse_hostfw_config {
2799 my ($filename, $fh, $cluster_conf, $verbose) = @_;
2800
2801 my $empty_conf = { rules => [], options => {}};
2802
2803 return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2804 }
2805
2806 sub parse_vmfw_config {
2807 my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2808
2809 my $empty_conf = {
2810 rules => [],
2811 options => {},
2812 aliases => {},
2813 ipset => {} ,
2814 ipset_comments => {},
2815 };
2816
2817 return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2818 }
2819
2820 sub parse_clusterfw_config {
2821 my ($filename, $fh, $verbose) = @_;
2822
2823 my $section;
2824 my $group;
2825
2826 my $empty_conf = {
2827 rules => [],
2828 options => {},
2829 aliases => {},
2830 groups => {},
2831 group_comments => {},
2832 ipset => {} ,
2833 ipset_comments => {},
2834 };
2835
2836 return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2837 }
2838
2839 sub run_locked {
2840 my ($code, @param) = @_;
2841
2842 my $timeout = 10;
2843
2844 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2845
2846 die $@ if $@;
2847
2848 return $res;
2849 }
2850
2851 sub read_local_vm_config {
2852
2853 my $qemu = {};
2854 my $lxc = {};
2855
2856 my $vmdata = { qemu => $qemu, lxc => $lxc };
2857
2858 my $vmlist = PVE::Cluster::get_vmlist();
2859 return $vmdata if !$vmlist || !$vmlist->{ids};
2860 my $ids = $vmlist->{ids};
2861
2862 foreach my $vmid (keys %$ids) {
2863 next if !$vmid; # skip VE0
2864 my $d = $ids->{$vmid};
2865 next if !$d->{node} || $d->{node} ne $nodename;
2866 next if !$d->{type};
2867 if ($d->{type} eq 'qemu') {
2868 if ($have_qemu_server) {
2869 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
2870 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2871 $qemu->{$vmid} = $conf;
2872 }
2873 }
2874 } elsif ($d->{type} eq 'lxc') {
2875 if ($have_lxc) {
2876 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
2877 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2878 $lxc->{$vmid} = $conf;
2879 }
2880 }
2881 }
2882 }
2883
2884 return $vmdata;
2885 };
2886
2887 sub load_vmfw_conf {
2888 my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2889
2890 my $vmfw_conf = {};
2891
2892 $dir = $pvefw_conf_dir if !defined($dir);
2893
2894 my $filename = "$dir/$vmid.fw";
2895 if (my $fh = IO::File->new($filename, O_RDONLY)) {
2896 $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2897 $vmfw_conf->{vmid} = $vmid;
2898 }
2899
2900 return $vmfw_conf;
2901 }
2902
2903 my $format_rules = sub {
2904 my ($rules, $allow_iface) = @_;
2905
2906 my $raw = '';
2907
2908 foreach my $rule (@$rules) {
2909 if ($rule->{type} eq 'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2910 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2911 $raw .= uc($rule->{type});
2912 if ($rule->{macro}) {
2913 $raw .= " $rule->{macro}($rule->{action})";
2914 } else {
2915 $raw .= " " . $rule->{action};
2916 }
2917 if ($allow_iface && $rule->{iface}) {
2918 $raw .= " -i $rule->{iface}";
2919 }
2920
2921 if ($rule->{type} ne 'group') {
2922 $raw .= " -source $rule->{source}" if $rule->{source};
2923 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2924 $raw .= " -p $rule->{proto}" if $rule->{proto};
2925 $raw .= " -dport $rule->{dport}" if $rule->{dport};