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fix 901: encode unicode characters in sha digest
[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 File::Basename;
16 use File::Path;
17 use IO::File;
18 use Net::IP;
19 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
20 use Encode;
21
22 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
23 my $pvefw_conf_dir = "/etc/pve/firewall";
24 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
25
26 # dynamically include PVE::QemuServer and PVE::LXC
27 # to avoid dependency problems
28 my $have_qemu_server;
29 eval {
30 require PVE::QemuServer;
31 $have_qemu_server = 1;
32 };
33
34 my $have_lxc;
35 eval {
36 require PVE::LXC;
37 $have_lxc = 1;
38 };
39
40
41 my $pve_fw_status_dir = "/var/lib/pve-firewall";
42
43 mkdir $pve_fw_status_dir; # make sure this exists
44
45 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
46 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
47 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
48
49 my $max_alias_name_length = 64;
50 my $max_ipset_name_length = 64;
51 my $max_group_name_length = 20;
52
53 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
54 sub pve_verify_ip_or_cidr {
55 my ($cidr, $noerr) = @_;
56
57 if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
58 return $cidr if Net::IP->new($cidr);
59 return undef if $noerr;
60 die Net::IP::Error() . "\n";
61 }
62 return undef if $noerr;
63 die "value does not look like a valid IP address or CIDR network\n";
64 }
65
66 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
67 sub pve_verify_ip_or_cidr_or_alias {
68 my ($cidr, $noerr) = @_;
69
70 return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
71
72 return pve_verify_ip_or_cidr($cidr, $noerr);
73 }
74
75 PVE::JSONSchema::register_standard_option('ipset-name', {
76 description => "IP set name.",
77 type => 'string',
78 pattern => $ipset_name_pattern,
79 minLength => 2,
80 maxLength => $max_ipset_name_length,
81 });
82
83 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
84 description => "Alias name.",
85 type => 'string',
86 pattern => $ip_alias_pattern,
87 minLength => 2,
88 maxLength => $max_alias_name_length,
89 });
90
91 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
92 description => "Log level.",
93 type => 'string',
94 enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
95 optional => 1,
96 });
97
98 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
99 description => "Security Group name.",
100 type => 'string',
101 pattern => $security_group_name_pattern,
102 minLength => 2,
103 maxLength => $max_group_name_length,
104 });
105
106 my $feature_ipset_nomatch = 0;
107 eval {
108 my (undef, undef, $release) = POSIX::uname();
109 if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
110 my ($major, $minor) = ($1, $2);
111 $feature_ipset_nomatch = 1 if ($major > 3) ||
112 ($major == 3 && $minor >= 7);
113 }
114
115 };
116
117 my $nodename = PVE::INotify::nodename();
118
119 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
120
121 my $default_log_level = 'nolog'; # avoid logs by default
122
123 my $log_level_hash = {
124 debug => 7,
125 info => 6,
126 notice => 5,
127 warning => 4,
128 err => 3,
129 crit => 2,
130 alert => 1,
131 emerg => 0,
132 };
133
134 # we need to overwrite some macros for ipv6
135 my $pve_ipv6fw_macros = {
136 'Ping' => [
137 { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
138 ],
139 'NeighborDiscovery' => [
140 "IPv6 neighbor solicitation, neighbor and router advertisement",
141 { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
142 { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
143 { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
144 { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
145 ],
146 'DHCPv6' => [
147 { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
148 ],
149 'Trcrt' => [
150 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
151 { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
152 ],
153 };
154
155 # imported/converted from: /usr/share/shorewall/macro.*
156 my $pve_fw_macros = {
157 'Amanda' => [
158 "Amanda Backup",
159 { action => 'PARAM', proto => 'udp', dport => '10080' },
160 { action => 'PARAM', proto => 'tcp', dport => '10080' },
161 ],
162 'Auth' => [
163 "Auth (identd) traffic",
164 { action => 'PARAM', proto => 'tcp', dport => '113' },
165 ],
166 'BGP' => [
167 "Border Gateway Protocol traffic",
168 { action => 'PARAM', proto => 'tcp', dport => '179' },
169 ],
170 'BitTorrent' => [
171 "BitTorrent traffic for BitTorrent 3.1 and earlier",
172 { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
173 { action => 'PARAM', proto => 'udp', dport => '6881' },
174 ],
175 'BitTorrent32' => [
176 "BitTorrent traffic for BitTorrent 3.2 and later",
177 { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
178 { action => 'PARAM', proto => 'udp', dport => '6881' },
179 ],
180 'Ceph' => [
181 "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
182 { action => 'PARAM', proto => 'tcp', dport => '6789' },
183 { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
184 ],
185 'CVS' => [
186 "Concurrent Versions System pserver traffic",
187 { action => 'PARAM', proto => 'tcp', dport => '2401' },
188 ],
189 'Citrix' => [
190 "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
191 { action => 'PARAM', proto => 'tcp', dport => '1494' },
192 { action => 'PARAM', proto => 'udp', dport => '1604' },
193 { action => 'PARAM', proto => 'tcp', dport => '2598' },
194 ],
195 'DAAP' => [
196 "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
197 { action => 'PARAM', proto => 'tcp', dport => '3689' },
198 { action => 'PARAM', proto => 'udp', dport => '3689' },
199 ],
200 'DCC' => [
201 "Distributed Checksum Clearinghouse spam filtering mechanism",
202 { action => 'PARAM', proto => 'tcp', dport => '6277' },
203 ],
204 'DHCPfwd' => [
205 "Forwarded DHCP traffic",
206 { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
207 ],
208 'DNS' => [
209 "Domain Name System traffic (upd and tcp)",
210 { action => 'PARAM', proto => 'udp', dport => '53' },
211 { action => 'PARAM', proto => 'tcp', dport => '53' },
212 ],
213 'Distcc' => [
214 "Distributed Compiler service",
215 { action => 'PARAM', proto => 'tcp', dport => '3632' },
216 ],
217 'FTP' => [
218 "File Transfer Protocol",
219 { action => 'PARAM', proto => 'tcp', dport => '21' },
220 ],
221 'Finger' => [
222 "Finger protocol (RFC 742)",
223 { action => 'PARAM', proto => 'tcp', dport => '79' },
224 ],
225 'GNUnet' => [
226 "GNUnet secure peer-to-peer networking traffic",
227 { action => 'PARAM', proto => 'tcp', dport => '2086' },
228 { action => 'PARAM', proto => 'udp', dport => '2086' },
229 { action => 'PARAM', proto => 'tcp', dport => '1080' },
230 { action => 'PARAM', proto => 'udp', dport => '1080' },
231 ],
232 'GRE' => [
233 "Generic Routing Encapsulation tunneling protocol",
234 { action => 'PARAM', proto => '47' },
235 ],
236 'Git' => [
237 "Git distributed revision control traffic",
238 { action => 'PARAM', proto => 'tcp', dport => '9418' },
239 ],
240 'HKP' => [
241 "OpenPGP HTTP keyserver protocol traffic",
242 { action => 'PARAM', proto => 'tcp', dport => '11371' },
243 ],
244 'HTTP' => [
245 "Hypertext Transfer Protocol (WWW)",
246 { action => 'PARAM', proto => 'tcp', dport => '80' },
247 ],
248 'HTTPS' => [
249 "Hypertext Transfer Protocol (WWW) over SSL",
250 { action => 'PARAM', proto => 'tcp', dport => '443' },
251 ],
252 'ICPV2' => [
253 "Internet Cache Protocol V2 (Squid) traffic",
254 { action => 'PARAM', proto => 'udp', dport => '3130' },
255 ],
256 'ICQ' => [
257 "AOL Instant Messenger traffic",
258 { action => 'PARAM', proto => 'tcp', dport => '5190' },
259 ],
260 'IMAP' => [
261 "Internet Message Access Protocol",
262 { action => 'PARAM', proto => 'tcp', dport => '143' },
263 ],
264 'IMAPS' => [
265 "Internet Message Access Protocol over SSL",
266 { action => 'PARAM', proto => 'tcp', dport => '993' },
267 ],
268 'IPIP' => [
269 "IPIP capsulation traffic",
270 { action => 'PARAM', proto => '94' },
271 ],
272 'IPsec' => [
273 "IPsec traffic",
274 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
275 { action => 'PARAM', proto => '50' },
276 ],
277 'IPsecah' => [
278 "IPsec authentication (AH) traffic",
279 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
280 { action => 'PARAM', proto => '51' },
281 ],
282 'IPsecnat' => [
283 "IPsec traffic and Nat-Traversal",
284 { action => 'PARAM', proto => 'udp', dport => '500' },
285 { action => 'PARAM', proto => 'udp', dport => '4500' },
286 { action => 'PARAM', proto => '50' },
287 ],
288 'IRC' => [
289 "Internet Relay Chat traffic",
290 { action => 'PARAM', proto => 'tcp', dport => '6667' },
291 ],
292 'Jetdirect' => [
293 "HP Jetdirect printing",
294 { action => 'PARAM', proto => 'tcp', dport => '9100' },
295 ],
296 'L2TP' => [
297 "Layer 2 Tunneling Protocol traffic",
298 { action => 'PARAM', proto => 'udp', dport => '1701' },
299 ],
300 'LDAP' => [
301 "Lightweight Directory Access Protocol traffic",
302 { action => 'PARAM', proto => 'tcp', dport => '389' },
303 ],
304 'LDAPS' => [
305 "Secure Lightweight Directory Access Protocol traffic",
306 { action => 'PARAM', proto => 'tcp', dport => '636' },
307 ],
308 'MSNP' => [
309 "Microsoft Notification Protocol",
310 { action => 'PARAM', proto => 'tcp', dport => '1863' },
311 ],
312 'MSSQL' => [
313 "Microsoft SQL Server",
314 { action => 'PARAM', proto => 'tcp', dport => '1433' },
315 ],
316 'Mail' => [
317 "Mail traffic (SMTP, SMTPS, Submission)",
318 { action => 'PARAM', proto => 'tcp', dport => '25' },
319 { action => 'PARAM', proto => 'tcp', dport => '465' },
320 { action => 'PARAM', proto => 'tcp', dport => '587' },
321 ],
322 'Munin' => [
323 "Munin networked resource monitoring traffic",
324 { action => 'PARAM', proto => 'tcp', dport => '4949' },
325 ],
326 'MySQL' => [
327 "MySQL server",
328 { action => 'PARAM', proto => 'tcp', dport => '3306' },
329 ],
330 'NNTP' => [
331 "NNTP traffic (Usenet).",
332 { action => 'PARAM', proto => 'tcp', dport => '119' },
333 ],
334 'NNTPS' => [
335 "Encrypted NNTP traffic (Usenet)",
336 { action => 'PARAM', proto => 'tcp', dport => '563' },
337 ],
338 'NTP' => [
339 "Network Time Protocol (ntpd)",
340 { action => 'PARAM', proto => 'udp', dport => '123' },
341 ],
342 'OSPF' => [
343 "OSPF multicast traffic",
344 { action => 'PARAM', proto => '89' },
345 ],
346 'OpenVPN' => [
347 "OpenVPN traffic",
348 { action => 'PARAM', proto => 'udp', dport => '1194' },
349 ],
350 'PCA' => [
351 "Symantec PCAnywere (tm)",
352 { action => 'PARAM', proto => 'udp', dport => '5632' },
353 { action => 'PARAM', proto => 'tcp', dport => '5631' },
354 ],
355 'POP3' => [
356 "POP3 traffic",
357 { action => 'PARAM', proto => 'tcp', dport => '110' },
358 ],
359 'POP3S' => [
360 "Encrypted POP3 traffic",
361 { action => 'PARAM', proto => 'tcp', dport => '995' },
362 ],
363 'PPtP' => [
364 "Point-to-Point Tunneling Protocol",
365 { action => 'PARAM', proto => '47' },
366 { action => 'PARAM', proto => 'tcp', dport => '1723' },
367 ],
368 'Ping' => [
369 "ICMP echo request",
370 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
371 ],
372 'PostgreSQL' => [
373 "PostgreSQL server",
374 { action => 'PARAM', proto => 'tcp', dport => '5432' },
375 ],
376 'Printer' => [
377 "Line Printer protocol printing",
378 { action => 'PARAM', proto => 'tcp', dport => '515' },
379 ],
380 'RDP' => [
381 "Microsoft Remote Desktop Protocol traffic",
382 { action => 'PARAM', proto => 'tcp', dport => '3389' },
383 ],
384 'RIP' => [
385 "Routing Information Protocol (bidirectional)",
386 { action => 'PARAM', proto => 'udp', dport => '520' },
387 ],
388 'RNDC' => [
389 "BIND remote management protocol",
390 { action => 'PARAM', proto => 'tcp', dport => '953' },
391 ],
392 'Razor' => [
393 "Razor Antispam System",
394 { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
395 ],
396 'Rdate' => [
397 "Remote time retrieval (rdate)",
398 { action => 'PARAM', proto => 'tcp', dport => '37' },
399 ],
400 'Rsync' => [
401 "Rsync server",
402 { action => 'PARAM', proto => 'tcp', dport => '873' },
403 ],
404 'SANE' => [
405 "SANE network scanning",
406 { action => 'PARAM', proto => 'tcp', dport => '6566' },
407 ],
408 'SMB' => [
409 "Microsoft SMB traffic",
410 { action => 'PARAM', proto => 'udp', dport => '135,445' },
411 { action => 'PARAM', proto => 'udp', dport => '137:139' },
412 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
413 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
414 ],
415 'SMBswat' => [
416 "Samba Web Administration Tool",
417 { action => 'PARAM', proto => 'tcp', dport => '901' },
418 ],
419 'SMTP' => [
420 "Simple Mail Transfer Protocol",
421 { action => 'PARAM', proto => 'tcp', dport => '25' },
422 ],
423 'SMTPS' => [
424 "Encrypted Simple Mail Transfer Protocol",
425 { action => 'PARAM', proto => 'tcp', dport => '465' },
426 ],
427 'SNMP' => [
428 "Simple Network Management Protocol",
429 { action => 'PARAM', proto => 'udp', dport => '161:162' },
430 { action => 'PARAM', proto => 'tcp', dport => '161' },
431 ],
432 'SPAMD' => [
433 "Spam Assassin SPAMD traffic",
434 { action => 'PARAM', proto => 'tcp', dport => '783' },
435 ],
436 'SSH' => [
437 "Secure shell traffic",
438 { action => 'PARAM', proto => 'tcp', dport => '22' },
439 ],
440 'SVN' => [
441 "Subversion server (svnserve)",
442 { action => 'PARAM', proto => 'tcp', dport => '3690' },
443 ],
444 'SixXS' => [
445 "SixXS IPv6 Deployment and Tunnel Broker",
446 { action => 'PARAM', proto => 'tcp', dport => '3874' },
447 { action => 'PARAM', proto => 'udp', dport => '3740' },
448 { action => 'PARAM', proto => '41' },
449 { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
450 ],
451 'Squid' => [
452 "Squid web proxy traffic",
453 { action => 'PARAM', proto => 'tcp', dport => '3128' },
454 ],
455 'Submission' => [
456 "Mail message submission traffic",
457 { action => 'PARAM', proto => 'tcp', dport => '587' },
458 ],
459 'Syslog' => [
460 "Syslog protocol (RFC 5424) traffic",
461 { action => 'PARAM', proto => 'udp', dport => '514' },
462 { action => 'PARAM', proto => 'tcp', dport => '514' },
463 ],
464 'TFTP' => [
465 "Trivial File Transfer Protocol traffic",
466 { action => 'PARAM', proto => 'udp', dport => '69' },
467 ],
468 'Telnet' => [
469 "Telnet traffic",
470 { action => 'PARAM', proto => 'tcp', dport => '23' },
471 ],
472 'Telnets' => [
473 "Telnet over SSL",
474 { action => 'PARAM', proto => 'tcp', dport => '992' },
475 ],
476 'Time' => [
477 "RFC 868 Time protocol",
478 { action => 'PARAM', proto => 'tcp', dport => '37' },
479 ],
480 'Trcrt' => [
481 "Traceroute (for up to 30 hops) traffic",
482 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
483 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
484 ],
485 'VNC' => [
486 "VNC traffic for VNC display's 0 - 99",
487 { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
488 ],
489 'VNCL' => [
490 "VNC traffic from Vncservers to Vncviewers in listen mode",
491 { action => 'PARAM', proto => 'tcp', dport => '5500' },
492 ],
493 'Web' => [
494 "WWW traffic (HTTP and HTTPS)",
495 { action => 'PARAM', proto => 'tcp', dport => '80' },
496 { action => 'PARAM', proto => 'tcp', dport => '443' },
497 ],
498 'Webcache' => [
499 "Web Cache/Proxy traffic (port 8080)",
500 { action => 'PARAM', proto => 'tcp', dport => '8080' },
501 ],
502 'Webmin' => [
503 "Webmin traffic",
504 { action => 'PARAM', proto => 'tcp', dport => '10000' },
505 ],
506 'Whois' => [
507 "Whois (nicname, RFC 3912) traffic",
508 { action => 'PARAM', proto => 'tcp', dport => '43' },
509 ],
510 };
511
512 my $pve_fw_parsed_macros;
513 my $pve_fw_macro_descr;
514 my $pve_fw_macro_ipversion = {};
515 my $pve_fw_preferred_macro_names = {};
516
517 my $pve_std_chains = {};
518 $pve_std_chains->{4} = {
519 'PVEFW-SET-ACCEPT-MARK' => [
520 "-j MARK --set-mark 1",
521 ],
522 'PVEFW-DropBroadcast' => [
523 # same as shorewall 'Broadcast'
524 # simply DROP BROADCAST/MULTICAST/ANYCAST
525 # we can use this to reduce logging
526 { action => 'DROP', dsttype => 'BROADCAST' },
527 { action => 'DROP', dsttype => 'MULTICAST' },
528 { action => 'DROP', dsttype => 'ANYCAST' },
529 { action => 'DROP', dest => '224.0.0.0/4' },
530 ],
531 'PVEFW-reject' => [
532 # same as shorewall 'reject'
533 { action => 'DROP', dsttype => 'BROADCAST' },
534 { action => 'DROP', source => '224.0.0.0/4' },
535 { action => 'DROP', proto => 'icmp' },
536 "-p tcp -j REJECT --reject-with tcp-reset",
537 "-p udp -j REJECT --reject-with icmp-port-unreachable",
538 "-p icmp -j REJECT --reject-with icmp-host-unreachable",
539 "-j REJECT --reject-with icmp-host-prohibited",
540 ],
541 'PVEFW-Drop' => [
542 # same as shorewall 'Drop', which is equal to DROP,
543 # but REJECT/DROP some packages to reduce logging,
544 # and ACCEPT critical ICMP types
545 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
546 # we are not interested in BROADCAST/MULTICAST/ANYCAST
547 { action => 'PVEFW-DropBroadcast' },
548 # ACCEPT critical ICMP types
549 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
550 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
551 # Drop packets with INVALID state
552 "-m conntrack --ctstate INVALID -j DROP",
553 # Drop Microsoft SMB noise
554 { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
555 { action => 'DROP', proto => 'udp', dport => '137:139'},
556 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
557 { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
558 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
559 # Drop new/NotSyn traffic so that it doesn't get logged
560 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
561 # Drop DNS replies
562 { action => 'DROP', proto => 'udp', sport => 53 },
563 ],
564 'PVEFW-Reject' => [
565 # same as shorewall 'Reject', which is equal to Reject,
566 # but REJECT/DROP some packages to reduce logging,
567 # and ACCEPT critical ICMP types
568 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
569 # we are not interested in BROADCAST/MULTICAST/ANYCAST
570 { action => 'PVEFW-DropBroadcast' },
571 # ACCEPT critical ICMP types
572 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
573 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
574 # Drop packets with INVALID state
575 "-m conntrack --ctstate INVALID -j DROP",
576 # Drop Microsoft SMB noise
577 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
578 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
579 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
580 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
581 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
582 # Drop new/NotSyn traffic so that it doesn't get logged
583 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
584 # Drop DNS replies
585 { action => 'DROP', proto => 'udp', sport => 53 },
586 ],
587 'PVEFW-tcpflags' => [
588 # same as shorewall tcpflags action.
589 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
590 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
591 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
592 "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
593 "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
594 "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
595 ],
596 'PVEFW-smurfs' => [
597 # same as shorewall smurfs action
598 # Filter packets for smurfs (packets with a broadcast address as the source).
599 "-s 0.0.0.0/32 -j RETURN", # allow DHCP
600 "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
601 "-s 224.0.0.0/4 -g PVEFW-smurflog",
602 ],
603 };
604
605 $pve_std_chains->{6} = {
606 'PVEFW-SET-ACCEPT-MARK' => [
607 "-j MARK --set-mark 1",
608 ],
609 'PVEFW-DropBroadcast' => [
610 # same as shorewall 'Broadcast'
611 # simply DROP BROADCAST/MULTICAST/ANYCAST
612 # we can use this to reduce logging
613 #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
614 # ipv6 addrtype does not work with kernel 2.6.32
615 #{ action => 'DROP', dsttype => 'MULTICAST' },
616 #{ action => 'DROP', dsttype => 'ANYCAST' },
617 { action => 'DROP', dest => 'ff00::/8' },
618 #{ action => 'DROP', dest => '224.0.0.0/4' },
619 ],
620 'PVEFW-reject' => [
621 # same as shorewall 'reject'
622 #{ action => 'DROP', dsttype => 'BROADCAST' },
623 #{ action => 'DROP', source => '224.0.0.0/4' },
624 { action => 'DROP', proto => 'icmpv6' },
625 "-p tcp -j REJECT --reject-with tcp-reset",
626 #"-p udp -j REJECT --reject-with icmp-port-unreachable",
627 #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
628 #"-j REJECT --reject-with icmp-host-prohibited",
629 ],
630 'PVEFW-Drop' => [
631 # same as shorewall 'Drop', which is equal to DROP,
632 # but REJECT/DROP some packages to reduce logging,
633 # and ACCEPT critical ICMP types
634 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
635 # we are not interested in BROADCAST/MULTICAST/ANYCAST
636 { action => 'PVEFW-DropBroadcast' },
637 # ACCEPT critical ICMP types
638 { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
639 { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
640 { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
641
642 # Drop packets with INVALID state
643 "-m conntrack --ctstate INVALID -j DROP",
644 # Drop Microsoft SMB noise
645 { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
646 { action => 'DROP', proto => 'udp', dport => '137:139'},
647 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
648 { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
649 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
650 # Drop new/NotSyn traffic so that it doesn't get logged
651 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
652 # Drop DNS replies
653 { action => 'DROP', proto => 'udp', sport => 53 },
654 ],
655 'PVEFW-Reject' => [
656 # same as shorewall 'Reject', which is equal to Reject,
657 # but REJECT/DROP some packages to reduce logging,
658 # and ACCEPT critical ICMP types
659 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
660 # we are not interested in BROADCAST/MULTICAST/ANYCAST
661 { action => 'PVEFW-DropBroadcast' },
662 # ACCEPT critical ICMP types
663 { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
664 { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
665 { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
666
667 # Drop packets with INVALID state
668 "-m conntrack --ctstate INVALID -j DROP",
669 # Drop Microsoft SMB noise
670 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
671 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
672 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
673 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
674 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
675 # Drop new/NotSyn traffic so that it doesn't get logged
676 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
677 # Drop DNS replies
678 { action => 'DROP', proto => 'udp', sport => 53 },
679 ],
680 'PVEFW-tcpflags' => [
681 # same as shorewall tcpflags action.
682 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
683 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
684 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
685 "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
686 "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
687 "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
688 ],
689 };
690
691 # iptables -p icmp -h
692 my $icmp_type_names = {
693 any => 1,
694 'echo-reply' => 1,
695 'destination-unreachable' => 1,
696 'network-unreachable' => 1,
697 'host-unreachable' => 1,
698 'protocol-unreachable' => 1,
699 'port-unreachable' => 1,
700 'fragmentation-needed' => 1,
701 'source-route-failed' => 1,
702 'network-unknown' => 1,
703 'host-unknown' => 1,
704 'network-prohibited' => 1,
705 'host-prohibited' => 1,
706 'TOS-network-unreachable' => 1,
707 'TOS-host-unreachable' => 1,
708 'communication-prohibited' => 1,
709 'host-precedence-violation' => 1,
710 'precedence-cutoff' => 1,
711 'source-quench' => 1,
712 'redirect' => 1,
713 'network-redirect' => 1,
714 'host-redirect' => 1,
715 'TOS-network-redirect' => 1,
716 'TOS-host-redirect' => 1,
717 'echo-request' => 1,
718 'router-advertisement' => 1,
719 'router-solicitation' => 1,
720 'time-exceeded' => 1,
721 'ttl-zero-during-transit' => 1,
722 'ttl-zero-during-reassembly' => 1,
723 'parameter-problem' => 1,
724 'ip-header-bad' => 1,
725 'required-option-missing' => 1,
726 'timestamp-request' => 1,
727 'timestamp-reply' => 1,
728 'address-mask-request' => 1,
729 'address-mask-reply' => 1,
730 };
731
732 # ip6tables -p icmpv6 -h
733
734 my $icmpv6_type_names = {
735 'any' => 1,
736 'destination-unreachable' => 1,
737 'no-route' => 1,
738 'communication-prohibited' => 1,
739 'address-unreachable' => 1,
740 'port-unreachable' => 1,
741 'packet-too-big' => 1,
742 'time-exceeded' => 1,
743 'ttl-zero-during-transit' => 1,
744 'ttl-zero-during-reassembly' => 1,
745 'parameter-problem' => 1,
746 'bad-header' => 1,
747 'unknown-header-type' => 1,
748 'unknown-option' => 1,
749 'echo-request' => 1,
750 'echo-reply' => 1,
751 'router-solicitation' => 1,
752 'router-advertisement' => 1,
753 'neighbor-solicitation' => 1,
754 'neighbour-solicitation' => 1,
755 'neighbor-advertisement' => 1,
756 'neighbour-advertisement' => 1,
757 'redirect' => 1,
758 };
759
760 sub init_firewall_macros {
761
762 $pve_fw_parsed_macros = {};
763
764 my $parse = sub {
765 my ($k, $macro) = @_;
766 my $lc_name = lc($k);
767 $pve_fw_macro_ipversion->{$k} = 0;
768 while (!ref($macro->[0])) {
769 my $desc = shift @$macro;
770 if ($desc eq 'ipv4only') {
771 $pve_fw_macro_ipversion->{$k} = 4;
772 } elsif ($desc eq 'ipv6only') {
773 $pve_fw_macro_ipversion->{$k} = 6;
774 } else {
775 $pve_fw_macro_descr->{$k} = $desc;
776 }
777 }
778 $pve_fw_preferred_macro_names->{$lc_name} = $k;
779 $pve_fw_parsed_macros->{$k} = $macro;
780 };
781
782 foreach my $k (keys %$pve_fw_macros) {
783 &$parse($k, $pve_fw_macros->{$k});
784 }
785
786 foreach my $k (keys %$pve_ipv6fw_macros) {
787 next if $pve_fw_parsed_macros->{$k};
788 &$parse($k, $pve_ipv6fw_macros->{$k});
789 $pve_fw_macro_ipversion->{$k} = 6;
790 }
791 }
792
793 init_firewall_macros();
794
795 sub get_macros {
796 return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
797 }
798
799 my $etc_services;
800
801 sub get_etc_services {
802
803 return $etc_services if $etc_services;
804
805 my $filename = "/etc/services";
806
807 my $fh = IO::File->new($filename, O_RDONLY);
808 if (!$fh) {
809 warn "unable to read '$filename' - $!\n";
810 return {};
811 }
812
813 my $services = {};
814
815 while (my $line = <$fh>) {
816 chomp ($line);
817 next if $line =~m/^#/;
818 next if ($line =~m/^\s*$/);
819
820 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
821 $services->{byid}->{$2}->{name} = $1;
822 $services->{byid}->{$2}->{port} = $2;
823 $services->{byid}->{$2}->{$3} = 1;
824 $services->{byname}->{$1} = $services->{byid}->{$2};
825 }
826 }
827
828 close($fh);
829
830 $etc_services = $services;
831
832
833 return $etc_services;
834 }
835
836 my $etc_protocols;
837
838 sub get_etc_protocols {
839 return $etc_protocols if $etc_protocols;
840
841 my $filename = "/etc/protocols";
842
843 my $fh = IO::File->new($filename, O_RDONLY);
844 if (!$fh) {
845 warn "unable to read '$filename' - $!\n";
846 return {};
847 }
848
849 my $protocols = {};
850
851 while (my $line = <$fh>) {
852 chomp ($line);
853 next if $line =~m/^#/;
854 next if ($line =~m/^\s*$/);
855
856 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
857 $protocols->{byid}->{$2}->{name} = $1;
858 $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
859 }
860 }
861
862 close($fh);
863
864 # add special case for ICMP v6
865 $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
866 $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
867
868 $etc_protocols = $protocols;
869
870 return $etc_protocols;
871 }
872
873 my $ipv4_mask_hash_localnet = {
874 '255.255.0.0' => 16,
875 '255.255.128.0' => 17,
876 '255.255.192.0' => 18,
877 '255.255.224.0' => 19,
878 '255.255.240.0' => 20,
879 '255.255.248.0' => 21,
880 '255.255.252.0' => 22,
881 '255.255.254.0' => 23,
882 '255.255.255.0' => 24,
883 '255.255.255.128' => 25,
884 '255.255.255.192' => 26,
885 '255.255.255.224' => 27,
886 '255.255.255.240' => 28,
887 '255.255.255.248' => 29,
888 '255.255.255.252' => 30,
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 } else {
915 $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
916 next if !defined($mask);
917 }
918 my $cidr = "$entry->{dest}/$mask";
919 my $testnet = Net::IP->new($cidr);
920 if ($testnet->overlaps($testip) == $Net::IP::IP_B_IN_A_OVERLAP) {
921 $__local_network = $cidr;
922 return;
923 }
924 }
925 };
926 warn $@ if $@;
927
928 return $__local_network;
929 }
930
931 # ipset names are limited to 31 characters,
932 # and we use '-v4' or '-v6' to indicate IP versions,
933 # and we use '_swap' suffix for atomic update,
934 # for example PVEFW-${VMID}-${ipset_name}_swap
935
936 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
937
938 sub compute_ipset_chain_name {
939 my ($vmid, $ipset_name, $ipversion) = @_;
940
941 $vmid = 0 if !defined($vmid);
942
943 my $id = "$vmid-${ipset_name}-v$ipversion";
944
945 if (length($id) > $max_iptables_ipset_name_length) {
946 $id = PVE::Tools::fnv31a_hex($id);
947 }
948
949 return "PVEFW-$id";
950 }
951
952 sub compute_ipfilter_ipset_name {
953 my ($iface) = @_;
954
955 return "ipfilter-$iface";
956 }
957
958 sub parse_address_list {
959 my ($str) = @_;
960
961 if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
962 die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
963 return;
964 }
965
966 if ($str =~ m/^${ip_alias_pattern}$/) {
967 die "alias name too long\n" if length($str) > $max_alias_name_length;
968 return;
969 }
970
971 my $count = 0;
972 my $iprange = 0;
973 my $ipversion;
974
975 foreach my $elem (split(/,/, $str)) {
976 $count++;
977 my $ip = Net::IP->new($elem);
978 if (!$ip) {
979 my $err = Net::IP::Error();
980 die "invalid IP address: $err\n";
981 }
982 $iprange = 1 if $elem =~ m/-/;
983
984 my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
985
986 die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
987 if $ipversion && ($new_ipversion != $ipversion);
988
989 $ipversion = $new_ipversion;
990 }
991
992 die "you can't use a range in a list\n" if $iprange && $count > 1;
993
994 return $ipversion;
995 }
996
997 sub parse_port_name_number_or_range {
998 my ($str) = @_;
999
1000 my $services = PVE::Firewall::get_etc_services();
1001 my $count = 0;
1002 my $icmp_port = 0;
1003
1004 foreach my $item (split(/,/, $str)) {
1005 $count++;
1006 if ($item =~ m/^(\d+):(\d+)$/) {
1007 my ($port1, $port2) = ($1, $2);
1008 die "invalid port '$port1'\n" if $port1 > 65535;
1009 die "invalid port '$port2'\n" if $port2 > 65535;
1010 } elsif ($item =~ m/^(\d+)$/) {
1011 my $port = $1;
1012 die "invalid port '$port'\n" if $port > 65535;
1013 } else {
1014 if ($icmp_type_names->{$item}) {
1015 $icmp_port = 1;
1016 } elsif ($icmpv6_type_names->{$item}) {
1017 $icmp_port = 1;
1018 } else {
1019 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1020 }
1021 }
1022 }
1023
1024 die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
1025
1026 return $count;
1027 }
1028
1029 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
1030 sub pve_fw_verify_port_spec {
1031 my ($portstr) = @_;
1032
1033 parse_port_name_number_or_range($portstr);
1034
1035 return $portstr;
1036 }
1037
1038 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1039 sub pve_fw_verify_addr_spec {
1040 my ($list) = @_;
1041
1042 parse_address_list($list);
1043
1044 return $list;
1045 }
1046
1047 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1048 sub pve_fw_verify_protocol_spec {
1049 my ($proto) = @_;
1050
1051 my $protocols = get_etc_protocols();
1052
1053 die "unknown protocol '$proto'\n" if $proto &&
1054 !(defined($protocols->{byname}->{$proto}) ||
1055 defined($protocols->{byid}->{$proto}));
1056
1057 return $proto;
1058 }
1059
1060
1061 # helper function for API
1062
1063 sub copy_opject_with_digest {
1064 my ($object) = @_;
1065
1066 my $sha = Digest::SHA->new('sha1');
1067
1068 my $res = {};
1069 foreach my $k (sort keys %$object) {
1070 my $v = $object->{$k};
1071 next if !defined($v);
1072 $res->{$k} = $v;
1073 $sha->add($k, ':', $v, "\n");
1074 }
1075
1076 my $digest = $sha->hexdigest;
1077
1078 $res->{digest} = $digest;
1079
1080 return wantarray ? ($res, $digest) : $res;
1081 }
1082
1083 sub copy_list_with_digest {
1084 my ($list) = @_;
1085
1086 my $sha = Digest::SHA->new('sha1');
1087
1088 my $res = [];
1089 foreach my $entry (@$list) {
1090 my $data = {};
1091 foreach my $k (sort keys %$entry) {
1092 my $v = $entry->{$k};
1093 next if !defined($v);
1094 $data->{$k} = $v;
1095 # Note: digest ignores refs ($rule->{errors})
1096 # since Digest::SHA expects a series of bytes,
1097 # we have to encode the value here to prevent errors when
1098 # using utf8 characters (eg. in comments)
1099 $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
1100 }
1101 push @$res, $data;
1102 }
1103
1104 my $digest = $sha->hexdigest;
1105
1106 foreach my $entry (@$res) {
1107 $entry->{digest} = $digest;
1108 }
1109
1110 return wantarray ? ($res, $digest) : $res;
1111 }
1112
1113 my $rule_properties = {
1114 pos => {
1115 description => "Update rule at position <pos>.",
1116 type => 'integer',
1117 minimum => 0,
1118 optional => 1,
1119 },
1120 digest => get_standard_option('pve-config-digest'),
1121 type => {
1122 type => 'string',
1123 optional => 1,
1124 enum => ['in', 'out', 'group'],
1125 },
1126 action => {
1127 description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1128 type => 'string',
1129 optional => 1,
1130 pattern => $security_group_name_pattern,
1131 maxLength => 20,
1132 minLength => 2,
1133 },
1134 macro => {
1135 type => 'string',
1136 optional => 1,
1137 maxLength => 128,
1138 },
1139 iface => get_standard_option('pve-iface', { optional => 1 }),
1140 source => {
1141 type => 'string', format => 'pve-fw-addr-spec',
1142 optional => 1,
1143 },
1144 dest => {
1145 type => 'string', format => 'pve-fw-addr-spec',
1146 optional => 1,
1147 },
1148 proto => {
1149 type => 'string', format => 'pve-fw-protocol-spec',
1150 optional => 1,
1151 },
1152 enable => {
1153 type => 'integer',
1154 minimum => 0,
1155 optional => 1,
1156 },
1157 sport => {
1158 type => 'string', format => 'pve-fw-port-spec',
1159 optional => 1,
1160 },
1161 dport => {
1162 type => 'string', format => 'pve-fw-port-spec',
1163 optional => 1,
1164 },
1165 comment => {
1166 type => 'string',
1167 optional => 1,
1168 },
1169 };
1170
1171 sub add_rule_properties {
1172 my ($properties) = @_;
1173
1174 foreach my $k (keys %$rule_properties) {
1175 my $h = $rule_properties->{$k};
1176 # copy data, so that we can modify later without side effects
1177 foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1178 }
1179
1180 return $properties;
1181 }
1182
1183 sub delete_rule_properties {
1184 my ($rule, $delete_str) = @_;
1185
1186 foreach my $opt (PVE::Tools::split_list($delete_str)) {
1187 raise_param_exc({ 'delete' => "no such property ('$opt')"})
1188 if !defined($rule_properties->{$opt});
1189 raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1190 if $opt eq 'type' || $opt eq 'action';
1191 delete $rule->{$opt};
1192 }
1193
1194 return $rule;
1195 }
1196
1197 my $apply_macro = sub {
1198 my ($macro_name, $param, $verify, $ipversion) = @_;
1199
1200 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1201 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1202
1203 if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1204 $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1205 }
1206
1207 # skip macros which are specific to another ipversion
1208 if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1209 return if $ipversion != $required;
1210 }
1211
1212 my $rules = [];
1213
1214 foreach my $templ (@$macro_rules) {
1215 my $rule = {};
1216 my $param_used = {};
1217 foreach my $k (keys %$templ) {
1218 my $v = $templ->{$k};
1219 if ($v eq 'PARAM') {
1220 $v = $param->{$k};
1221 $param_used->{$k} = 1;
1222 } elsif ($v eq 'DEST') {
1223 $v = $param->{dest};
1224 $param_used->{dest} = 1;
1225 } elsif ($v eq 'SOURCE') {
1226 $v = $param->{source};
1227 $param_used->{source} = 1;
1228 }
1229
1230 if (!defined($v)) {
1231 my $msg = "missing parameter '$k' in macro '$macro_name'";
1232 raise_param_exc({ macro => $msg }) if $verify;
1233 die "$msg\n";
1234 }
1235 $rule->{$k} = $v;
1236 }
1237 foreach my $k (keys %$param) {
1238 next if $k eq 'macro';
1239 next if !defined($param->{$k});
1240 next if $param_used->{$k};
1241 if (defined($rule->{$k})) {
1242 if ($rule->{$k} ne $param->{$k}) {
1243 my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1244 raise_param_exc({ $k => $msg }) if $verify;
1245 die "$msg\n";
1246 }
1247 } else {
1248 $rule->{$k} = $param->{$k};
1249 }
1250 }
1251 push @$rules, $rule;
1252 }
1253
1254 return $rules;
1255 };
1256
1257 my $rule_env_iface_lookup = {
1258 'ct' => 1,
1259 'vm' => 1,
1260 'group' => 0,
1261 'cluster' => 1,
1262 'host' => 1,
1263 };
1264
1265 sub verify_rule {
1266 my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1267
1268 my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1269
1270 my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1271 die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1272
1273 my $errors = $rule->{errors} || {};
1274
1275 my $error_count = 0;
1276
1277 my $add_error = sub {
1278 my ($param, $msg) = @_;
1279 chomp $msg;
1280 raise_param_exc({ $param => $msg }) if !$noerr;
1281 $error_count++;
1282 $errors->{$param} = $msg if !$errors->{$param};
1283 };
1284
1285 my $ipversion;
1286 my $set_ip_version = sub {
1287 my $vers = shift;
1288 if ($vers) {
1289 die "detected mixed ipv4/ipv6 adresses in rule\n"
1290 if $ipversion && ($vers != $ipversion);
1291 $ipversion = $vers;
1292 }
1293 };
1294
1295 my $check_ipset_or_alias_property = sub {
1296 my ($name, $expected_ipversion) = @_;
1297
1298 if (my $value = $rule->{$name}) {
1299 if ($value =~ m/^\+/) {
1300 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1301 &$add_error($name, "no such ipset '$1'")
1302 if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1303
1304 } else {
1305 &$add_error($name, "invalid ipset name '$value'");
1306 }
1307 } elsif ($value =~ m/^${ip_alias_pattern}$/){
1308 my $alias = lc($value);
1309 &$add_error($name, "no such alias '$value'")
1310 if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1311 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1312 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1313
1314 &$set_ip_version($e->{ipversion});
1315 }
1316 }
1317 };
1318
1319 my $type = $rule->{type};
1320 my $action = $rule->{action};
1321
1322 &$add_error('type', "missing property") if !$type;
1323 &$add_error('action', "missing property") if !$action;
1324
1325 if ($type) {
1326 if ($type eq 'in' || $type eq 'out') {
1327 &$add_error('action', "unknown action '$action'")
1328 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1329 } elsif ($type eq 'group') {
1330 &$add_error('type', "security groups not allowed")
1331 if !$allow_groups;
1332 &$add_error('action', "invalid characters in security group name")
1333 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1334 } else {
1335 &$add_error('type', "unknown rule type '$type'");
1336 }
1337 }
1338
1339 if ($rule->{iface}) {
1340 &$add_error('type', "parameter -i not allowed for this rule type")
1341 if !$allow_iface;
1342 eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1343 &$add_error('iface', $@) if $@;
1344 if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1345 &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1346 if $rule->{iface} !~ m/^net(\d+)$/;
1347 }
1348 }
1349
1350 if ($rule->{macro}) {
1351 if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1352 $rule->{macro} = $preferred_name;
1353 } else {
1354 &$add_error('macro', "unknown macro '$rule->{macro}'");
1355 }
1356 }
1357
1358 if ($rule->{proto}) {
1359 eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1360 &$add_error('proto', $@) if $@;
1361 &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1362 &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1363 }
1364
1365 if ($rule->{dport}) {
1366 eval { parse_port_name_number_or_range($rule->{dport}); };
1367 &$add_error('dport', $@) if $@;
1368 &$add_error('proto', "missing property - 'dport' requires this property")
1369 if !$rule->{proto};
1370 }
1371
1372 if ($rule->{sport}) {
1373 eval { parse_port_name_number_or_range($rule->{sport}); };
1374 &$add_error('sport', $@) if $@;
1375 &$add_error('proto', "missing property - 'sport' requires this property")
1376 if !$rule->{proto};
1377 }
1378
1379 if ($rule->{source}) {
1380 eval {
1381 my $source_ipversion = parse_address_list($rule->{source});
1382 &$set_ip_version($source_ipversion);
1383 };
1384 &$add_error('source', $@) if $@;
1385 &$check_ipset_or_alias_property('source', $ipversion);
1386 }
1387
1388 if ($rule->{dest}) {
1389 eval {
1390 my $dest_ipversion = parse_address_list($rule->{dest});
1391 &$set_ip_version($dest_ipversion);
1392 };
1393 &$add_error('dest', $@) if $@;
1394 &$check_ipset_or_alias_property('dest', $ipversion);
1395 }
1396
1397 $rule->{ipversion} = $ipversion if $ipversion;
1398
1399 if ($rule->{macro} && !$error_count) {
1400 eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1401 if (my $err = $@) {
1402 if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1403 my $eh = $err->{errors};
1404 foreach my $p (keys %$eh) {
1405 &$add_error($p, $eh->{$p});
1406 }
1407 } else {
1408 &$add_error('macro', "$err");
1409 }
1410 }
1411 }
1412
1413 $rule->{errors} = $errors if $error_count;
1414
1415 return $rule;
1416 }
1417
1418 sub copy_rule_data {
1419 my ($rule, $param) = @_;
1420
1421 foreach my $k (keys %$rule_properties) {
1422 if (defined(my $v = $param->{$k})) {
1423 if ($v eq '' || $v eq '-') {
1424 delete $rule->{$k};
1425 } else {
1426 $rule->{$k} = $v;
1427 }
1428 }
1429 }
1430
1431 return $rule;
1432 }
1433
1434 sub rules_modify_permissions {
1435 my ($rule_env) = @_;
1436
1437 if ($rule_env eq 'host') {
1438 return {
1439 check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1440 };
1441 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1442 return {
1443 check => ['perm', '/', [ 'Sys.Modify' ]],
1444 };
1445 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1446 return {
1447 check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1448 }
1449 }
1450
1451 return undef;
1452 }
1453
1454 sub rules_audit_permissions {
1455 my ($rule_env) = @_;
1456
1457 if ($rule_env eq 'host') {
1458 return {
1459 check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1460 };
1461 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1462 return {
1463 check => ['perm', '/', [ 'Sys.Audit' ]],
1464 };
1465 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1466 return {
1467 check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1468 }
1469 }
1470
1471 return undef;
1472 }
1473
1474 # core functions
1475 my $bridge_firewall_enabled = 0;
1476
1477 sub enable_bridge_firewall {
1478
1479 return if $bridge_firewall_enabled; # only once
1480
1481 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1482 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1483
1484 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1485 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1486
1487 $bridge_firewall_enabled = 1;
1488 }
1489
1490 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1491
1492 sub iptables_restore_cmdlist {
1493 my ($cmdlist) = @_;
1494
1495 run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1496 }
1497
1498 sub ip6tables_restore_cmdlist {
1499 my ($cmdlist) = @_;
1500
1501 run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1502 }
1503
1504 sub ipset_restore_cmdlist {
1505 my ($cmdlist) = @_;
1506
1507 run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1508 }
1509
1510 sub iptables_get_chains {
1511 my ($iptablescmd) = @_;
1512
1513 $iptablescmd = "iptables" if !$iptablescmd;
1514
1515 my $res = {};
1516
1517 # check what chains we want to track
1518 my $is_pvefw_chain = sub {
1519 my $name = shift;
1520
1521 return 1 if $name =~ m/^PVEFW-\S+$/;
1522
1523 return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1524
1525 return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1526
1527 return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1528 return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1529
1530 return undef;
1531 };
1532
1533 my $table = '';
1534
1535 my $hooks = {};
1536
1537 my $parser = sub {
1538 my $line = shift;
1539
1540 return if $line =~ m/^#/;
1541 return if $line =~ m/^\s*$/;
1542
1543 if ($line =~ m/^\*(\S+)$/) {
1544 $table = $1;
1545 return;
1546 }
1547
1548 return if $table ne 'filter';
1549
1550 if ($line =~ m/^:(\S+)\s/) {
1551 my $chain = $1;
1552 return if !&$is_pvefw_chain($chain);
1553 $res->{$chain} = "unknown";
1554 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1555 my ($chain, $sig) = ($1, $2);
1556 return if !&$is_pvefw_chain($chain);
1557 $res->{$chain} = $sig;
1558 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1559 $hooks->{$1} = 1;
1560 } else {
1561 # simply ignore the rest
1562 return;
1563 }
1564 };
1565
1566 run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1567
1568 return wantarray ? ($res, $hooks) : $res;
1569 }
1570
1571 sub iptables_chain_digest {
1572 my ($rules) = @_;
1573 my $digest = Digest::SHA->new('sha1');
1574 foreach my $rule (@$rules) { # order is important
1575 $digest->add($rule);
1576 }
1577 return $digest->b64digest;
1578 }
1579
1580 sub ipset_chain_digest {
1581 my ($rules) = @_;
1582
1583 my $digest = Digest::SHA->new('sha1');
1584 foreach my $rule (sort @$rules) { # note: sorted
1585 $digest->add($rule);
1586 }
1587 return $digest->b64digest;
1588 }
1589
1590 sub ipset_get_chains {
1591
1592 my $res = {};
1593 my $chains = {};
1594
1595 my $parser = sub {
1596 my $line = shift;
1597
1598 return if $line =~ m/^#/;
1599 return if $line =~ m/^\s*$/;
1600 if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1601 my $chain = $1;
1602 $line =~ s/\s+$//; # delete trailing white space
1603 push @{$chains->{$chain}}, $line;
1604 } else {
1605 # simply ignore the rest
1606 return;
1607 }
1608 };
1609
1610 run_command("/sbin/ipset save", outfunc => $parser);
1611
1612 # compute digest for each chain
1613 foreach my $chain (keys %$chains) {
1614 $res->{$chain} = ipset_chain_digest($chains->{$chain});
1615 }
1616
1617 return $res;
1618 }
1619
1620 sub ruleset_generate_cmdstr {
1621 my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1622
1623 return if defined($rule->{enable}) && !$rule->{enable};
1624 return if $rule->{errors};
1625
1626 die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1627
1628 my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1629 my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1630
1631 my @cmd = ();
1632
1633 push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1634 push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1635
1636 my $source = $rule->{source};
1637 my $dest = $rule->{dest};
1638
1639 if ($source) {
1640 if ($source =~ m/^\+/) {
1641 if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1642 my $name = $1;
1643 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1644 my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1645 push @cmd, "-m set --match-set ${ipset_chain} src";
1646 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1647 my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1648 push @cmd, "-m set --match-set ${ipset_chain} src";
1649 } else {
1650 die "no such ipset '$name'\n";
1651 }
1652 } else {
1653 die "invalid security group name '$source'\n";
1654 }
1655 } elsif ($source =~ m/^${ip_alias_pattern}$/){
1656 my $alias = lc($source);
1657 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1658 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1659 die "no such alias '$source'\n" if !$e;
1660 push @cmd, "-s $e->{cidr}";
1661 } elsif ($source =~ m/\-/){
1662 push @cmd, "-m iprange --src-range $source";
1663 } else {
1664 push @cmd, "-s $source";
1665 }
1666 }
1667
1668 if ($dest) {
1669 if ($dest =~ m/^\+/) {
1670 if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1671 my $name = $1;
1672 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1673 my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1674 push @cmd, "-m set --match-set ${ipset_chain} dst";
1675 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1676 my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1677 push @cmd, "-m set --match-set ${ipset_chain} dst";
1678 } else {
1679 die "no such ipset '$name'\n";
1680 }
1681 } else {
1682 die "invalid security group name '$dest'\n";
1683 }
1684 } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1685 my $alias = lc($dest);
1686 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1687 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1688 die "no such alias '$dest'\n" if !$e;
1689 push @cmd, "-d $e->{cidr}";
1690 } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1691 push @cmd, "-m iprange --dst-range $dest";
1692 } else {
1693 push @cmd, "-d $dest";
1694 }
1695 }
1696
1697 if ($rule->{proto}) {
1698 push @cmd, "-p $rule->{proto}";
1699
1700 my $multiport = 0;
1701 $multiport++ if $nbdport > 1;
1702 $multiport++ if $nbsport > 1;
1703
1704 push @cmd, "--match multiport" if $multiport;
1705
1706 die "multiport: option '--sports' cannot be used together with '--dports'\n"
1707 if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1708
1709 if ($rule->{dport}) {
1710 if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1711 # Note: we use dport to store --icmp-type
1712 die "unknown icmp-type '$rule->{dport}'\n"
1713 if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
1714 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1715 } elsif ($rule->{proto} && $rule->{proto} eq 'icmpv6') {
1716 # Note: we use dport to store --icmpv6-type
1717 die "unknown icmpv6-type '$rule->{dport}'\n"
1718 if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
1719 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1720 } else {
1721 if ($nbdport > 1) {
1722 if ($multiport == 2) {
1723 push @cmd, "--ports $rule->{dport}";
1724 } else {
1725 push @cmd, "--dports $rule->{dport}";
1726 }
1727 } else {
1728 push @cmd, "--dport $rule->{dport}";
1729 }
1730 }
1731 }
1732
1733 if ($rule->{sport}) {
1734 if ($nbsport > 1) {
1735 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1736 } else {
1737 push @cmd, "--sport $rule->{sport}";
1738 }
1739 }
1740 } elsif ($rule->{dport} || $rule->{sport}) {
1741 die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1742 die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1743 }
1744
1745 push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1746
1747 if (my $action = $rule->{action}) {
1748 $action = $actions->{$action} if defined($actions->{$action});
1749 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1750 push @cmd, $goto ? "-g $action" : "-j $action";
1751 }
1752
1753 return scalar(@cmd) ? join(' ', @cmd) : undef;
1754 }
1755
1756 sub ruleset_generate_rule {
1757 my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1758
1759 my $rules;
1760
1761 if ($rule->{macro}) {
1762 $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
1763 } else {
1764 $rules = [ $rule ];
1765 }
1766
1767 # update all or nothing
1768
1769 my @cmds = ();
1770 foreach my $tmp (@$rules) {
1771 if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1772 push @cmds, $cmdstr;
1773 }
1774 }
1775
1776 foreach my $cmdstr (@cmds) {
1777 ruleset_addrule($ruleset, $chain, $cmdstr);
1778 }
1779 }
1780
1781 sub ruleset_generate_rule_insert {
1782 my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
1783
1784 die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1785
1786 if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $rule, $actions, $goto)) {
1787 ruleset_insertrule($ruleset, $chain, $cmdstr);
1788 }
1789 }
1790
1791 sub ruleset_create_chain {
1792 my ($ruleset, $chain) = @_;
1793
1794 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1795 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1796
1797 die "chain '$chain' already exists\n" if $ruleset->{$chain};
1798
1799 $ruleset->{$chain} = [];
1800 }
1801
1802 sub ruleset_chain_exist {
1803 my ($ruleset, $chain) = @_;
1804
1805 return $ruleset->{$chain} ? 1 : undef;
1806 }
1807
1808 sub ruleset_addrule {
1809 my ($ruleset, $chain, $rule) = @_;
1810
1811 die "no such chain '$chain'\n" if !$ruleset->{$chain};
1812
1813 push @{$ruleset->{$chain}}, "-A $chain $rule";
1814 }
1815
1816 sub ruleset_insertrule {
1817 my ($ruleset, $chain, $rule) = @_;
1818
1819 die "no such chain '$chain'\n" if !$ruleset->{$chain};
1820
1821 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1822 }
1823
1824 sub get_log_rule_base {
1825 my ($chain, $vmid, $msg, $loglevel) = @_;
1826
1827 die "internal error - no log level" if !defined($loglevel);
1828
1829 $vmid = 0 if !defined($vmid);
1830
1831 # Note: we use special format for prefix to pass further
1832 # info to log daemon (VMID, LOGVELEL and CHAIN)
1833
1834 return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1835 }
1836
1837 sub ruleset_addlog {
1838 my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1839
1840 return if !defined($loglevel);
1841
1842 my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1843
1844 $logrule = "$rule $logrule" if defined($rule);
1845
1846 ruleset_addrule($ruleset, $chain, $logrule);
1847 }
1848
1849 sub ruleset_add_chain_policy {
1850 my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
1851
1852 if ($policy eq 'ACCEPT') {
1853
1854 ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
1855 { ACCEPT => $accept_action});
1856
1857 } elsif ($policy eq 'DROP') {
1858
1859 ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1860
1861 ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1862
1863 ruleset_addrule($ruleset, $chain, "-j DROP");
1864 } elsif ($policy eq 'REJECT') {
1865 ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1866
1867 ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1868
1869 ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1870 } else {
1871 # should not happen
1872 die "internal error: unknown policy '$policy'";
1873 }
1874 }
1875
1876 sub ruleset_chain_add_ndp {
1877 my ($ruleset, $chain, $ipversion, $options, $direction) = @_;
1878 return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
1879
1880 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation -j ACCEPT");
1881 if ($direction ne 'OUT' || $options->{radv}) {
1882 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement -j ACCEPT");
1883 }
1884 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation -j ACCEPT");
1885 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement -j ACCEPT");
1886 }
1887
1888 sub ruleset_chain_add_conn_filters {
1889 my ($ruleset, $chain, $accept) = @_;
1890
1891 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1892 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1893 }
1894
1895 sub ruleset_chain_add_input_filters {
1896 my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
1897
1898 if ($cluster_conf->{ipset}->{blacklist}){
1899 if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1900 ruleset_create_chain($ruleset, "PVEFW-blacklist");
1901 ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1902 ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1903 }
1904 my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
1905 ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1906 }
1907
1908 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1909 if ($ipversion == 4) {
1910 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1911 }
1912 }
1913
1914 if ($options->{tcpflags}) {
1915 ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1916 }
1917 }
1918
1919 sub ruleset_create_vm_chain {
1920 my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
1921
1922 ruleset_create_chain($ruleset, $chain);
1923 my $accept = generate_nfqueue($options);
1924
1925 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1926 if ($ipversion == 4) {
1927 if ($direction eq 'OUT') {
1928 ruleset_generate_rule($ruleset, $chain, $ipversion,
1929 { action => 'PVEFW-SET-ACCEPT-MARK',
1930 proto => 'udp', sport => 68, dport => 67 });
1931 } else {
1932 ruleset_generate_rule($ruleset, $chain, $ipversion,
1933 { action => 'ACCEPT',
1934 proto => 'udp', sport => 67, dport => 68 });
1935 }
1936 } elsif ($ipversion == 6) {
1937 if ($direction eq 'OUT') {
1938 ruleset_generate_rule($ruleset, $chain, $ipversion,
1939 { action => 'PVEFW-SET-ACCEPT-MARK',
1940 proto => 'udp', sport => 546, dport => 547 });
1941 } else {
1942 ruleset_generate_rule($ruleset, $chain, $ipversion,
1943 { action => 'ACCEPT',
1944 proto => 'udp', sport => 547, dport => 546 });
1945 }
1946 }
1947
1948 }
1949
1950 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction);
1951
1952 if ($direction eq 'OUT') {
1953 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1954 ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1955 }
1956 if ($ipversion == 6 && !$options->{radv}) {
1957 ruleset_addrule($ruleset, $chain, '-p icmpv6 --icmpv6-type router-advertisement -j DROP');
1958 }
1959 if ($ipfilter_ipset) {
1960 ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
1961 }
1962 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1963 }
1964 }
1965
1966 sub ruleset_add_group_rule {
1967 my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
1968
1969 my $group = $rule->{action};
1970 my $group_chain = "GROUP-$group-$direction";
1971 if(!ruleset_chain_exist($ruleset, $group_chain)){
1972 generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
1973 }
1974
1975 if ($direction eq 'OUT' && $rule->{iface_out}) {
1976 ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1977 } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1978 ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1979 } else {
1980 ruleset_addrule($ruleset, $chain, "-j $group_chain");
1981 }
1982
1983 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1984 }
1985
1986 sub ruleset_generate_vm_rules {
1987 my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
1988
1989 my $lc_direction = lc($direction);
1990
1991 my $in_accept = generate_nfqueue($options);
1992
1993 foreach my $rule (@$rules) {
1994 next if $rule->{iface} && $rule->{iface} ne $netid;
1995 next if !$rule->{enable} || $rule->{errors};
1996 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
1997
1998 if ($rule->{type} eq 'group') {
1999 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2000 $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2001 } else {
2002 next if $rule->{type} ne $lc_direction;
2003 eval {
2004 if ($direction eq 'OUT') {
2005 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2006 { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2007 undef, $cluster_conf, $vmfw_conf);
2008 } else {
2009 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2010 { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
2011 undef, $cluster_conf, $vmfw_conf);
2012 }
2013 };
2014 warn $@ if $@;
2015 }
2016 }
2017 }
2018
2019 sub generate_nfqueue {
2020 my ($options) = @_;
2021
2022 if ($options->{ips}) {
2023 my $action = "NFQUEUE";
2024 if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2025 if (defined($3) && defined($1)) {
2026 $action .= " --queue-balance $1:$3";
2027 } elsif (defined($1)) {
2028 $action .= " --queue-num $1";
2029 }
2030 }
2031 $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2032 return $action;
2033 } else {
2034 return "ACCEPT";
2035 }
2036 }
2037
2038 sub ruleset_generate_vm_ipsrules {
2039 my ($ruleset, $options, $direction, $iface) = @_;
2040
2041 if ($options->{ips} && $direction eq 'IN') {
2042 my $nfqueue = generate_nfqueue($options);
2043
2044 if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2045 ruleset_create_chain($ruleset, "PVEFW-IPS");
2046 }
2047
2048 ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
2049 }
2050 }
2051
2052 sub generate_tap_rules_direction {
2053 my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2054
2055 my $lc_direction = lc($direction);
2056
2057 my $rules = $vmfw_conf->{rules};
2058
2059 my $options = $vmfw_conf->{options};
2060 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2061
2062 my $tapchain = "$iface-$direction";
2063
2064 my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2065 my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2066 if $vmfw_conf->{ipset}->{$ipfilter_name};
2067
2068 # create chain with mac and ip filter
2069 ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2070
2071 if ($options->{enable}) {
2072 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2073
2074 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2075
2076 # implement policy
2077 my $policy;
2078
2079 if ($direction eq 'OUT') {
2080 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2081 } else {
2082 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2083 }
2084
2085 my $accept = generate_nfqueue($options);
2086 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2087 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2088 } else {
2089 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2090 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2091 }
2092
2093 # plug the tap chain to bridge chain
2094 if ($direction eq 'IN') {
2095 ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2096 "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
2097 } else {
2098 ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2099 "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
2100 }
2101 }
2102
2103 sub enable_host_firewall {
2104 my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2105
2106 my $options = $hostfw_conf->{options};
2107 my $cluster_options = $cluster_conf->{options};
2108 my $rules = $hostfw_conf->{rules};
2109 my $cluster_rules = $cluster_conf->{rules};
2110
2111 # host inbound firewall
2112 my $chain = "PVEFW-HOST-IN";
2113 ruleset_create_chain($ruleset, $chain);
2114
2115 my $loglevel = get_option_log_level($options, "log_level_in");
2116
2117 ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
2118
2119 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options);
2120 ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2121 ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2122
2123 # we use RETURN because we need to check also tap rules
2124 my $accept_action = 'RETURN';
2125
2126 ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2127
2128 # add host rules first, so that cluster wide rules can be overwritten
2129 foreach my $rule (@$rules, @$cluster_rules) {
2130 next if !$rule->{enable} || $rule->{errors};
2131 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2132
2133 $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2134
2135 eval {
2136 if ($rule->{type} eq 'group') {
2137 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2138 } elsif ($rule->{type} eq 'in') {
2139 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2140 { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2141 undef, $cluster_conf, $hostfw_conf);
2142 }
2143 };
2144 warn $@ if $@;
2145 delete $rule->{iface_in};
2146 }
2147
2148 # allow standard traffic for management ipset (includes cluster network)
2149 my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2150 my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2151 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action"); # PVE API
2152 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action"); # PVE VNC Console
2153 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action"); # SPICE Proxy
2154 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action"); # SSH
2155
2156 my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2157 my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2158
2159 # corosync
2160 if ($localnet && ($ipversion == $localnet_ver)) {
2161 my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2162 ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
2163 ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
2164 }
2165
2166 # implement input policy
2167 my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2168 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2169
2170 # host outbound firewall
2171 $chain = "PVEFW-HOST-OUT";
2172 ruleset_create_chain($ruleset, $chain);
2173
2174 $loglevel = get_option_log_level($options, "log_level_out");
2175
2176 ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
2177
2178 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options);
2179 ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2180
2181 # we use RETURN because we may want to check other thigs later
2182 $accept_action = 'RETURN';
2183
2184 ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2185
2186 # add host rules first, so that cluster wide rules can be overwritten
2187 foreach my $rule (@$rules, @$cluster_rules) {
2188 next if !$rule->{enable} || $rule->{errors};
2189 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2190
2191 $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2192 eval {
2193 if ($rule->{type} eq 'group') {
2194 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2195 } elsif ($rule->{type} eq 'out') {
2196 ruleset_generate_rule($ruleset, $chain, $ipversion,
2197 $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2198 undef, $cluster_conf, $hostfw_conf);
2199 }
2200 };
2201 warn $@ if $@;
2202 delete $rule->{iface_out};
2203 }
2204
2205 # allow standard traffic on cluster network
2206 if ($localnet && ($ipversion == $localnet_ver)) {
2207 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action"); # PVE API
2208 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action"); # SSH
2209 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action"); # PVE VNC Console
2210 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action"); # SPICE Proxy
2211
2212 my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2213 ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
2214 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
2215 }
2216
2217 # implement output policy
2218 $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2219 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2220
2221 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2222 ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2223 }
2224
2225 sub generate_group_rules {
2226 my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2227
2228 my $rules = $cluster_conf->{groups}->{$group};
2229
2230 if (!$rules) {
2231 warn "no such security group '$group'\n";
2232 $rules = []; # create empty chain
2233 }
2234
2235 my $chain = "GROUP-${group}-IN";
2236
2237 ruleset_create_chain($ruleset, $chain);
2238 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2239
2240 foreach my $rule (@$rules) {
2241 next if $rule->{type} ne 'in';
2242 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2243 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2244 { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2245 undef, $cluster_conf);
2246 }
2247
2248 $chain = "GROUP-${group}-OUT";
2249
2250 ruleset_create_chain($ruleset, $chain);
2251 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2252
2253 foreach my $rule (@$rules) {
2254 next if $rule->{type} ne 'out';
2255 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2256 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2257 # check also other tap rules later
2258 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2259 { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2260 undef, $cluster_conf);
2261 }
2262 }
2263
2264 my $MAX_NETS = 32;
2265 my $valid_netdev_names = {};
2266 for (my $i = 0; $i < $MAX_NETS; $i++) {
2267 $valid_netdev_names->{"net$i"} = 1;
2268 }
2269
2270 sub parse_fw_rule {
2271 my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2272
2273 my $orig_line = $line;
2274
2275 my $rule = {};
2276
2277 # we can add single line comments to the end of the rule
2278 if ($line =~ s/#\s*(.*?)\s*$//) {
2279 $rule->{comment} = decode('utf8', $1);
2280 }
2281
2282 # we can disable a rule when prefixed with '|'
2283
2284 $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2285
2286 $line =~ s/^(\S+)\s+(\S+)\s*// ||
2287 die "unable to parse rule: $line\n";
2288
2289 $rule->{type} = lc($1);
2290 $rule->{action} = $2;
2291
2292 if ($rule->{type} eq 'in' || $rule->{type} eq 'out') {
2293 if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2294 $rule->{macro} = $1;
2295 $rule->{action} = $2;
2296 }
2297 }
2298
2299 while (length($line)) {
2300 if ($line =~ s/^-i (\S+)\s*//) {
2301 $rule->{iface} = $1;
2302 next;
2303 }
2304
2305 last if $rule->{type} eq 'group';
2306
2307 if ($line =~ s/^-p (\S+)\s*//) {
2308 $rule->{proto} = $1;
2309 next;
2310 }
2311
2312 if ($line =~ s/^-dport (\S+)\s*//) {
2313 $rule->{dport} = $1;
2314 next;
2315 }
2316
2317 if ($line =~ s/^-sport (\S+)\s*//) {
2318 $rule->{sport} = $1;
2319 next;
2320 }
2321 if ($line =~ s/^-source (\S+)\s*//) {
2322 $rule->{source} = $1;
2323 next;
2324 }
2325 if ($line =~ s/^-dest (\S+)\s*//) {
2326 $rule->{dest} = $1;
2327 next;
2328 }
2329
2330 last;
2331 }
2332
2333 die "unable to parse rule parameters: $line\n" if length($line);
2334
2335 $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2336 if ($verbose && $rule->{errors}) {
2337 warn "$prefix - errors in rule parameters: $orig_line\n";
2338 foreach my $p (keys %{$rule->{errors}}) {
2339 warn " $p: $rule->{errors}->{$p}\n";
2340 }
2341 }
2342
2343 return $rule;
2344 }
2345
2346 sub parse_vmfw_option {
2347 my ($line) = @_;
2348
2349 my ($opt, $value);
2350
2351 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2352
2353 if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ips):\s*(0|1)\s*$/i) {
2354 $opt = lc($1);
2355 $value = int($2);
2356 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2357 $opt = lc($1);
2358 $value = $2 ? lc($3) : '';
2359 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2360 $opt = lc($1);
2361 $value = uc($3);
2362 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2363 $opt = lc($1);
2364 $value = $2;
2365 } else {
2366 die "can't parse option '$line'\n"
2367 }
2368
2369 return ($opt, $value);
2370 }
2371
2372 sub parse_hostfw_option {
2373 my ($line) = @_;
2374
2375 my ($opt, $value);
2376
2377 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2378
2379 if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
2380 $opt = lc($1);
2381 $value = int($2);
2382 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2383 $opt = lc($1);
2384 $value = $2 ? lc($3) : '';
2385 } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2386 $opt = lc($1);
2387 $value = int($2);
2388 } else {
2389 die "can't parse option '$line'\n"
2390 }
2391
2392 return ($opt, $value);
2393 }
2394
2395 sub parse_clusterfw_option {
2396 my ($line) = @_;
2397
2398 my ($opt, $value);
2399
2400 if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2401 $opt = lc($1);
2402 $value = int($2);
2403 if (($value > 1) && ((time() - $value) > 60)) {
2404 $value = 0
2405 }
2406 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2407 $opt = lc($1);
2408 $value = uc($3);
2409 } else {
2410 die "can't parse option '$line'\n"
2411 }
2412
2413 return ($opt, $value);
2414 }
2415
2416 sub resolve_alias {
2417 my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2418
2419 my $alias = lc($cidr);
2420 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2421 $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2422
2423 die "no such alias '$cidr'\n" if !$e;;
2424
2425 return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2426 }
2427
2428 sub parse_ip_or_cidr {
2429 my ($cidr) = @_;
2430
2431 my $ipversion;
2432
2433 if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2434 $cidr =~ s|/128$||;
2435 $ipversion = 6;
2436 } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2437 $cidr =~ s|/32$||;
2438 $ipversion = 4;
2439 } else {
2440 die "value does not look like a valid IP address or CIDR network\n";
2441 }
2442
2443 return wantarray ? ($cidr, $ipversion) : $cidr;
2444 }
2445
2446 sub parse_alias {
2447 my ($line) = @_;
2448
2449 # we can add single line comments to the end of the line
2450 my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2451
2452 if ($line =~ m/^(\S+)\s(\S+)$/) {
2453 my ($name, $cidr) = ($1, $2);
2454 my $ipversion;
2455
2456 ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2457
2458 my $data = {
2459 name => $name,
2460 cidr => $cidr,
2461 ipversion => $ipversion,
2462 };
2463 $data->{comment} = $comment if $comment;
2464 return $data;
2465 }
2466
2467 return undef;
2468 }
2469
2470 sub generic_fw_config_parser {
2471 my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2472
2473 my $section;
2474 my $group;
2475
2476 my $res = $empty_conf;
2477
2478 while (defined(my $line = <$fh>)) {
2479 next if $line =~ m/^#/;
2480 next if $line =~ m/^\s*$/;
2481
2482 chomp $line;
2483
2484 my $linenr = $fh->input_line_number();
2485 my $prefix = "$filename (line $linenr)";
2486
2487 if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2488 $section = 'options';
2489 next;
2490 }
2491
2492 if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2493 $section = 'aliases';
2494 next;
2495 }
2496
2497 if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2498 $section = 'groups';
2499 $group = lc($1);
2500 my $comment = $2;
2501 eval {
2502 die "security group name too long\n" if length($group) > $max_group_name_length;
2503 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2504 };
2505 if (my $err = $@) {
2506 ($section, $group, $comment) = undef;
2507 warn "$prefix: $err";
2508 next;
2509 }
2510
2511 $res->{$section}->{$group} = [];
2512 $res->{group_comments}->{$group} = decode('utf8', $comment)
2513 if $comment;
2514 next;
2515 }
2516
2517 if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2518 $section = 'rules';
2519 next;
2520 }
2521
2522 if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2523 $section = 'ipset';
2524 $group = lc($1);
2525 my $comment = $2;
2526 eval {
2527 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2528 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2529 };
2530 if (my $err = $@) {
2531 ($section, $group, $comment) = undef;
2532 warn "$prefix: $err";
2533 next;
2534 }
2535
2536 $res->{$section}->{$group} = [];
2537 $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2538 if $comment;
2539 next;
2540 }
2541
2542 if (!$section) {
2543 warn "$prefix: skip line - no section\n";
2544 next;
2545 }
2546
2547 if ($section eq 'options') {
2548 eval {
2549 my ($opt, $value);
2550 if ($rule_env eq 'cluster') {
2551 ($opt, $value) = parse_clusterfw_option($line);
2552 } elsif ($rule_env eq 'host') {
2553 ($opt, $value) = parse_hostfw_option($line);
2554 } else {
2555 ($opt, $value) = parse_vmfw_option($line);
2556 }
2557 $res->{options}->{$opt} = $value;
2558 };
2559 warn "$prefix: $@" if $@;
2560 } elsif ($section eq 'aliases') {
2561 eval {
2562 my $data = parse_alias($line);
2563 $res->{aliases}->{lc($data->{name})} = $data;
2564 };
2565 warn "$prefix: $@" if $@;
2566 } elsif ($section eq 'rules') {
2567 my $rule;
2568 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2569 if (my $err = $@) {
2570 warn "$prefix: $err";
2571 next;
2572 }
2573 push @{$res->{$section}}, $rule;
2574 } elsif ($section eq 'groups') {
2575 my $rule;
2576 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2577 if (my $err = $@) {
2578 warn "$prefix: $err";
2579 next;
2580 }
2581 push @{$res->{$section}->{$group}}, $rule;
2582 } elsif ($section eq 'ipset') {
2583 # we can add single line comments to the end of the rule
2584 my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2585
2586 $line =~ m/^(\!)?\s*(\S+)\s*$/;
2587 my $nomatch = $1;
2588 my $cidr = $2;
2589 my $errors;
2590
2591 if ($nomatch && !$feature_ipset_nomatch) {
2592 $errors->{nomatch} = "nomatch not supported by kernel";
2593 }
2594
2595 eval {
2596 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2597 resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2598 } else {
2599 $cidr = parse_ip_or_cidr($cidr);
2600 }
2601 };
2602 if (my $err = $@) {
2603 chomp $err;
2604 $errors->{cidr} = $err;
2605 }
2606
2607 my $entry = { cidr => $cidr };
2608 $entry->{nomatch} = 1 if $nomatch;
2609 $entry->{comment} = $comment if $comment;
2610 $entry->{errors} = $errors if $errors;
2611
2612 if ($verbose && $errors) {
2613 warn "$prefix - errors in ipset '$group': $line\n";
2614 foreach my $p (keys %{$errors}) {
2615 warn " $p: $errors->{$p}\n";
2616 }
2617 }
2618
2619 push @{$res->{$section}->{$group}}, $entry;
2620 } else {
2621 warn "$prefix: skip line - unknown section\n";
2622 next;
2623 }
2624 }
2625
2626 return $res;
2627 }
2628
2629 sub parse_hostfw_config {
2630 my ($filename, $fh, $cluster_conf, $verbose) = @_;
2631
2632 my $empty_conf = { rules => [], options => {}};
2633
2634 return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2635 }
2636
2637 sub parse_vmfw_config {
2638 my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2639
2640 my $empty_conf = {
2641 rules => [],
2642 options => {},
2643 aliases => {},
2644 ipset => {} ,
2645 ipset_comments => {},
2646 };
2647
2648 return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2649 }
2650
2651 sub parse_clusterfw_config {
2652 my ($filename, $fh, $verbose) = @_;
2653
2654 my $section;
2655 my $group;
2656
2657 my $empty_conf = {
2658 rules => [],
2659 options => {},
2660 aliases => {},
2661 groups => {},
2662 group_comments => {},
2663 ipset => {} ,
2664 ipset_comments => {},
2665 };
2666
2667 return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2668 }
2669
2670 sub run_locked {
2671 my ($code, @param) = @_;
2672
2673 my $timeout = 10;
2674
2675 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2676
2677 die $@ if $@;
2678
2679 return $res;
2680 }
2681
2682 sub read_local_vm_config {
2683
2684 my $qemu = {};
2685 my $lxc = {};
2686
2687 my $vmdata = { qemu => $qemu, lxc => $lxc };
2688
2689 my $vmlist = PVE::Cluster::get_vmlist();
2690 return $vmdata if !$vmlist || !$vmlist->{ids};
2691 my $ids = $vmlist->{ids};
2692
2693 foreach my $vmid (keys %$ids) {
2694 next if !$vmid; # skip VE0
2695 my $d = $ids->{$vmid};
2696 next if !$d->{node} || $d->{node} ne $nodename;
2697 next if !$d->{type};
2698 if ($d->{type} eq 'qemu') {
2699 if ($have_qemu_server) {
2700 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2701 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2702 $qemu->{$vmid} = $conf;
2703 }
2704 }
2705 } elsif ($d->{type} eq 'lxc') {
2706 if ($have_lxc) {
2707 my $cfspath = PVE::LXC::cfs_config_path($vmid);
2708 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2709 $lxc->{$vmid} = $conf;
2710 }
2711 }
2712 }
2713 }
2714
2715 return $vmdata;
2716 };
2717
2718 sub load_vmfw_conf {
2719 my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2720
2721 my $vmfw_conf = {};
2722
2723 $dir = $pvefw_conf_dir if !defined($dir);
2724
2725 my $filename = "$dir/$vmid.fw";
2726 if (my $fh = IO::File->new($filename, O_RDONLY)) {
2727 $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2728 $vmfw_conf->{vmid} = $vmid;
2729 }
2730
2731 return $vmfw_conf;
2732 }
2733
2734 my $format_rules = sub {
2735 my ($rules, $allow_iface) = @_;
2736
2737 my $raw = '';
2738
2739 foreach my $rule (@$rules) {
2740 if ($rule->{type} eq 'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2741 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2742 $raw .= uc($rule->{type});
2743 if ($rule->{macro}) {
2744 $raw .= " $rule->{macro}($rule->{action})";
2745 } else {
2746 $raw .= " " . $rule->{action};
2747 }
2748 if ($allow_iface && $rule->{iface}) {
2749 $raw .= " -i $rule->{iface}";
2750 }
2751
2752 if ($rule->{type} ne 'group') {
2753 $raw .= " -source $rule->{source}" if $rule->{source};
2754 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2755 $raw .= " -p $rule->{proto}" if $rule->{proto};
2756 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2757 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2758 }
2759
2760 $raw .= " # " . encode('utf8', $rule->{comment})
2761 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2762 $raw .= "\n";
2763 } else {
2764 die "unknown rule type '$rule->{type}'";
2765 }
2766 }
2767
2768 return $raw;
2769 };
2770
2771 my $format_options = sub {
2772 my ($options) = @_;
2773
2774 my $raw = '';
2775
2776 $raw .= "[OPTIONS]\n\n";
2777 foreach my $opt (keys %$options) {
2778 $raw .= "$opt: $options->{$opt}\n";
2779 }
2780 $raw .= "\n";
2781
2782 return $raw;
2783 };
2784
2785 my $format_aliases = sub {
2786 my ($aliases) = @_;
2787
2788 my $raw = '';
2789
2790 $raw .= "[ALIASES]\n\n";
2791 foreach my $k (keys %$aliases) {
2792 my $e = $aliases->{$k};
2793 $raw .= "$e->{name} $e->{cidr}";
2794 $raw .= " # " . encode('utf8', $e->{comment})
2795 if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2796 $raw .= "\n";
2797 }
2798 $raw .= "\n";
2799
2800 return $raw;
2801 };
2802
2803 my $format_ipsets = sub {
2804 my ($fw_conf) = @_;
2805
2806 my $raw = '';
2807
2808 foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2809 if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2810 my $utf8comment = encode('utf8', $comment);
2811 $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2812 } else {
2813 $raw .= "[IPSET $ipset]\n\n";
2814 }
2815 my $options = $fw_conf->{ipset}->{$ipset};
2816
2817 my $nethash = {};
2818 foreach my $entry (@$options) {
2819 $nethash->{$entry->{cidr}} = $entry;
2820 }
2821
2822 foreach my $cidr (sort keys %$nethash) {
2823 my $entry = $nethash->{$cidr};
2824 my $line = $entry->{nomatch} ? '!' : '';
2825 $line .= $entry->{cidr};
2826 $line .= " # " . encode('utf8', $entry->{comment})
2827 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2828 $raw .= "$line\n";
2829 }
2830
2831 $raw .= "\n";
2832 }
2833
2834 return $raw;
2835 };
2836
2837 sub save_vmfw_conf {
2838 my ($vmid, $vmfw_conf) = @_;
2839
2840 my $raw = '';
2841
2842 my $options = $vmfw_conf->{options};
2843 $raw .= &$format_options($options) if $options && scalar(keys %$options);
2844
2845 my $aliases = $vmfw_conf->{aliases};
2846 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2847
2848 $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2849
2850 my $rules = $vmfw_conf->{rules} || [];
2851 if ($rules && scalar(@$rules)) {
2852 $raw .= "[RULES]\n\n";
2853 $raw .= &$format_rules($rules, 1);
2854 $raw .= "\n";
2855 }
2856
2857 my $filename = "$pvefw_conf_dir/$vmid.fw";
2858 if ($raw) {
2859 mkdir $pvefw_conf_dir;
2860 PVE::Tools::file_set_contents($filename, $raw);
2861 } else {
2862 unlink $filename;
2863 }
2864 }
2865
2866 sub remove_vmfw_conf {
2867 my ($vmid) = @_;
2868
2869 my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
2870
2871 unlink $vmfw_conffile;
2872 }
2873
2874 sub clone_vmfw_conf {
2875 my ($vmid, $newid) = @_;
2876
2877 my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
2878 my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
2879
2880 if (-f $clonevm_conffile) {
2881 unlink $clonevm_conffile;
2882 }
2883 if (-f $sourcevm_conffile) {
2884 my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
2885 PVE::Tools::file_set_contents($clonevm_conffile, $data);
2886 }
2887 }
2888
2889 sub read_vm_firewall_configs {
2890 my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2891
2892 my $vmfw_configs = {};
2893
2894 foreach my $vmid (keys %{$vmdata->{qemu}}) {
2895 my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2896 next if !$vmfw_conf->{options}; # skip if file does not exists
2897 $vmfw_configs->{$vmid} = $vmfw_conf;
2898 }
2899 foreach my $vmid (keys %{$vmdata->{lxc}}) {
2900 my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2901 next if !$vmfw_conf->{options}; # skip if file does not exists
2902 $vmfw_configs->{$vmid} = $vmfw_conf;
2903 }
2904
2905 return $vmfw_configs;
2906 }
2907
2908 sub get_option_log_level {
2909 my ($options, $k) = @_;
2910
2911 my $v = $options->{$k};
2912 $v = $default_log_level if !defined($v);
2913
2914 return undef if $v eq '' || $v eq 'nolog';
2915
2916 $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2917
2918 return $v if ($v >= 0) && ($v <= 7);
2919
2920 warn "unknown log level ($k = '$v')\n";
2921
2922 return undef;
2923 }
2924
2925 sub generate_std_chains {
2926 my ($ruleset, $options, $ipversion) = @_;
2927
2928 my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
2929
2930 my $loglevel = get_option_log_level($options, 'smurf_log_level');
2931
2932 my $chain;
2933
2934 if ($ipversion == 4) {
2935 # same as shorewall smurflog.
2936 $chain = 'PVEFW-smurflog';
2937 $std_chains->{$chain} = [];
2938
2939 push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2940 push @{$std_chains->{$chain}}, "-j DROP";
2941 }
2942
2943 # same as shorewall logflags action.
2944 $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2945 $chain = 'PVEFW-logflags';
2946 $std_chains->{$chain} = [];
2947
2948 # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2949 push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2950 push @{$std_chains->{$chain}}, "-j DROP";
2951
2952 foreach my $chain (keys %$std_chains) {
2953 ruleset_create_chain($ruleset, $chain);
2954 foreach my $rule (@{$std_chains->{$chain}}) {
2955 if (ref($rule)) {
2956 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2957 } else {
2958 ruleset_addrule($ruleset, $chain, $rule);
2959 }
2960 }
2961 }
2962 }
2963
2964 sub generate_ipset_chains {
2965 my ($ipset_ruleset, $clusterfw_conf, $fw_conf) = @_; #fixme
2966
2967 foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2968
2969 my $options = $fw_conf->{ipset}->{$ipset};
2970
2971 # remove duplicates
2972 my $nethash = {};
2973 foreach my $entry (@$options) {
2974 next if $entry->{errors}; # skip entries with errors
2975 eval {
2976 my ($cidr, $ver);
2977 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
2978 ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
2979 } else {
2980 ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
2981 }
2982 #http://backreference.org/2013/03/01/ipv6-address-normalization/
2983 if ($ver == 6) {
2984 $cidr = lc(Net::IP::ip_compress_address($cidr, 6));
2985 $cidr =~ s|/128$||;
2986 } else {
2987 $cidr =~ s|/32$||;
2988 }
2989
2990 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
2991 };
2992 warn $@ if $@;
2993 }
2994
2995 foreach my $ipversion (4, 6) {
2996 my $data = $nethash->{$ipversion};
2997
2998 my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
2999
3000 my $hashsize = scalar(@$options);
3001 if ($hashsize <= 64) {
3002 $hashsize = 64;
3003 } else {
3004 $hashsize = round_powerof2($hashsize);
3005 }
3006
3007 my $family = $ipversion == "6" ? "inet6" : "inet";
3008
3009 $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3010
3011 foreach my $cidr (sort keys %$data) {
3012 my $entry = $data->{$cidr};
3013
3014 my $cmd = "add $name $cidr";
3015 if ($entry->{nomatch}) {
3016 if ($feature_ipset_nomatch) {
3017 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3018 } else {
3019 warn "ignore !$cidr - nomatch not supported by kernel\n";
3020 }
3021 } else {
3022 push @{$ipset_ruleset->{$name}}, $cmd;
3023 }
3024 }
3025 }
3026 }
3027 }
3028
3029 sub round_powerof2 {
3030 my ($int) = @_;
3031
3032 $int--;
3033 $int |= $int >> $_ foreach (1,2,4,8,16);
3034 return ++$int;
3035 }
3036
3037 sub load_clusterfw_conf {
3038 my ($filename, $verbose) = @_;
3039
3040 $filename = $clusterfw_conf_filename if !defined($filename);
3041
3042 my $cluster_conf = {};
3043 if (my $fh = IO::File->new($filename, O_RDONLY)) {
3044 $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3045 }
3046
3047 return $cluster_conf;
3048 }
3049
3050 sub save_clusterfw_conf {
3051 my ($cluster_conf) = @_;
3052
3053 my $raw = '';
3054
3055 my $options = $cluster_conf->{options};
3056 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3057
3058 my $aliases = $cluster_conf->{aliases};
3059 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3060
3061 $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3062
3063 my $rules = $cluster_conf->{rules};
3064 if ($rules && scalar(@$rules)) {
3065 $raw .= "[RULES]\n\n";
3066 $raw .= &$format_rules($rules, 1);
3067 $raw .= "\n";
3068 }
3069
3070 if ($cluster_conf->{groups}) {
3071 foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3072 my $rules = $cluster_conf->{groups}->{$group};
3073 if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3074 my $utf8comment = encode('utf8', $comment);
3075 $raw .= "[group $group] # $utf8comment\n\n";
3076 } else {
3077 $raw .= "[group $group]\n\n";
3078 }
3079
3080 $raw .= &$format_rules($rules, 0);
3081 $raw .= "\n";
3082 }
3083 }
3084
3085 if ($raw) {
3086 mkdir $pvefw_conf_dir;
3087 PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3088 } else {
3089 unlink $clusterfw_conf_filename;
3090 }
3091 }
3092
3093 sub load_hostfw_conf {
3094 my ($cluster_conf, $filename, $verbose) = @_;
3095
3096 $filename = $hostfw_conf_filename if !defined($filename);
3097
3098 my $hostfw_conf = {};
3099 if (my $fh = IO::File->new($filename, O_RDONLY)) {
3100 $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3101 }
3102 return $hostfw_conf;
3103 }
3104
3105 sub save_hostfw_conf {
3106 my ($hostfw_conf) = @_;
3107
3108 my $raw = '';
3109
3110 my $options = $hostfw_conf->{options};
3111 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3112
3113 my $rules = $hostfw_conf->{rules};
3114 if ($rules && scalar(@$rules)) {
3115 $raw .= "[RULES]\n\n";
3116 $raw .= &$format_rules($rules, 1);
3117 $raw .= "\n";
3118 }
3119
3120 if ($raw) {
3121 PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3122 } else {
3123 unlink $hostfw_conf_filename;
3124 }
3125 }
3126
3127 sub compile {
3128 my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3129
3130 my $vmfw_configs;
3131
3132 if ($vmdata) { # test mode
3133 my $testdir = $vmdata->{testdir} || die "no test directory specified";
3134 my $filename = "$testdir/cluster.fw";
3135 $cluster_conf = load_clusterfw_conf($filename, $verbose);
3136
3137 $filename = "$testdir/host.fw";
3138 $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3139
3140 $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3141 } else { # normal operation
3142 $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3143
3144 $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3145
3146 $vmdata = read_local_vm_config();
3147 $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3148 }
3149
3150 my ($ruleset, $ipset_ruleset) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3151 my ($rulesetv6) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3152
3153 return ($ruleset, $ipset_ruleset, $rulesetv6);
3154 }
3155
3156 sub compile_iptables_filter {
3157 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3158
3159 my $localnet;
3160 if ($cluster_conf->{aliases}->{local_network}) {
3161 $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3162 } else {
3163 my $localnet_ver;
3164 ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3165
3166 $cluster_conf->{aliases}->{local_network} = {
3167 name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3168 }
3169
3170 push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3171
3172 return ({}, {}) if !$cluster_conf->{options}->{enable};
3173
3174 my $ruleset = {};
3175
3176 ruleset_create_chain($ruleset, "PVEFW-INPUT");
3177 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3178
3179 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3180
3181 my $hostfw_options = $hostfw_conf->{options} || {};
3182
3183 # fixme: what log level should we use here?
3184 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3185
3186 ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3187
3188 ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3189 ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3190
3191 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
3192
3193 ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3194 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
3195
3196 generate_std_chains($ruleset, $hostfw_options, $ipversion);
3197
3198 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3199
3200 my $ipset_ruleset = {};
3201
3202 if ($hostfw_enable) {
3203 eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3204 warn $@ if $@; # just to be sure - should not happen
3205 }
3206
3207 # generate firewall rules for QEMU VMs
3208 foreach my $vmid (keys %{$vmdata->{qemu}}) {
3209 eval {
3210 my $conf = $vmdata->{qemu}->{$vmid};
3211 my $vmfw_conf = $vmfw_configs->{$vmid};
3212 return if !$vmfw_conf;
3213
3214 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3215
3216 foreach my $netid (keys %$conf) {
3217 next if $netid !~ m/^net(\d+)$/;
3218 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3219 next if !$net->{firewall};
3220 my $iface = "tap${vmid}i$1";
3221
3222 my $macaddr = $net->{macaddr};
3223 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3224 $vmfw_conf, $vmid, 'IN', $ipversion);
3225 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3226 $vmfw_conf, $vmid, 'OUT', $ipversion);
3227 }
3228 };
3229 warn $@ if $@; # just to be sure - should not happen
3230 }
3231
3232 # generate firewall rules for LXC containers
3233 foreach my $vmid (keys %{$vmdata->{lxc}}) {
3234 eval {
3235 my $conf = $vmdata->{lxc}->{$vmid};
3236 my $vmfw_conf = $vmfw_configs->{$vmid};
3237 return if !$vmfw_conf;
3238
3239 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3240
3241 if ($vmfw_conf->{options}->{enable}) {
3242 foreach my $netid (keys %$conf) {
3243 next if $netid !~ m/^net(\d+)$/;
3244 my $net = PVE::LXC::parse_lxc_network($conf->{$netid});
3245 next if !$net->{firewall};
3246 my $iface = "veth${vmid}i$1";
3247 my $macaddr = $net->{hwaddr};
3248 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3249 $vmfw_conf, $vmid, 'IN', $ipversion);
3250 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3251 $vmfw_conf, $vmid, 'OUT', $ipversion);
3252 }
3253 }
3254 };
3255 warn $@ if $@; # just to be sure - should not happen
3256 }
3257
3258 if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3259 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3260 }
3261
3262 generate_ipset_chains($ipset_ruleset, undef, $cluster_conf);
3263
3264 return ($ruleset, $ipset_ruleset);
3265 }
3266
3267 sub get_ruleset_status {
3268 my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3269
3270 my $statushash = {};
3271
3272 foreach my $chain (sort keys %$ruleset) {
3273 my $sig = &$digest_fn($ruleset->{$chain});
3274
3275 $statushash->{$chain}->{sig} = $sig;
3276
3277 my $oldsig = $active_chains->{$chain};
3278 if (!defined($oldsig)) {
3279 $statushash->{$chain}->{action} = 'create';
3280 } else {
3281 if ($oldsig eq $sig) {
3282 $statushash->{$chain}->{action} = 'exists';
3283 } else {
3284 $statushash->{$chain}->{action} = 'update';
3285 }
3286 }
3287 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3288 foreach my $cmd (@{$ruleset->{$chain}}) {
3289 print "\t$cmd\n" if $verbose;
3290 }
3291 }
3292
3293 foreach my $chain (sort keys %$active_chains) {
3294 if (!defined($ruleset->{$chain})) {
3295 my $sig = $active_chains->{$chain};
3296 $statushash->{$chain}->{action} = 'delete';
3297 $statushash->{$chain}->{sig} = $sig;
3298 print "delete $chain ($sig)\n" if $verbose;
3299 }
3300 }
3301
3302 return $statushash;
3303 }
3304
3305 sub print_sig_rule {
3306 my ($chain, $sig) = @_;
3307
3308 # We just use this to store a SHA1 checksum used to detect changes
3309 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3310 }
3311
3312 sub get_ruleset_cmdlist {
3313 my ($ruleset, $verbose, $iptablescmd) = @_;
3314
3315 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3316
3317 my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3318 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3319
3320 # create missing chains first
3321 foreach my $chain (sort keys %$ruleset) {
3322 my $stat = $statushash->{$chain};
3323 die "internal error" if !$stat;
3324 next if $stat->{action} ne 'create';
3325
3326 $cmdlist .= ":$chain - [0:0]\n";
3327 }
3328
3329 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3330 my $chain = "PVEFW-$h";
3331 if ($ruleset->{$chain} && !$hooks->{$h}) {
3332 $cmdlist .= "-A $h -j $chain\n";
3333 }
3334 }
3335
3336 foreach my $chain (sort keys %$ruleset) {
3337 my $stat = $statushash->{$chain};
3338 die "internal error" if !$stat;
3339
3340 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3341 $cmdlist .= "-F $chain\n";
3342 foreach my $cmd (@{$ruleset->{$chain}}) {
3343 $cmdlist .= "$cmd\n";
3344 }
3345 $cmdlist .= print_sig_rule($chain, $stat->{sig});
3346 } elsif ($stat->{action} eq 'delete') {
3347 die "internal error"; # this should not happen
3348 } elsif ($stat->{action} eq 'exists') {
3349 # do nothing
3350 } else {
3351 die "internal error - unknown status '$stat->{action}'";
3352 }
3353 }
3354
3355 foreach my $chain (keys %$statushash) {
3356 next if $statushash->{$chain}->{action} ne 'delete';
3357 $cmdlist .= "-F $chain\n";
3358 }
3359 foreach my $chain (keys %$statushash) {
3360 next if $statushash->{$chain}->{action} ne 'delete';
3361 next if $chain eq 'PVEFW-INPUT';
3362 next if $chain eq 'PVEFW-OUTPUT';
3363 next if $chain eq 'PVEFW-FORWARD';
3364 $cmdlist .= "-X $chain\n";
3365 }
3366
3367 my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3368
3369 $cmdlist .= "COMMIT\n";
3370
3371 return wantarray ? ($cmdlist, $changes) : $cmdlist;
3372 }
3373
3374 sub get_ipset_cmdlist {
3375 my ($ruleset, $verbose) = @_;
3376
3377 my $cmdlist = "";
3378
3379 my $delete_cmdlist = "";
3380
3381 my $active_chains = ipset_get_chains();
3382 my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3383
3384 # remove stale _swap chains
3385 foreach my $chain (keys %$active_chains) {
3386 if ($chain =~ m/^PVEFW-\S+_swap$/) {
3387 $cmdlist .= "destroy $chain\n";
3388 }
3389 }
3390
3391 foreach my $chain (keys %$ruleset) {
3392 my $stat = $statushash->{$chain};
3393 die "internal error" if !$stat;
3394
3395 if ($stat->{action} eq 'create') {
3396 foreach my $cmd (@{$ruleset->{$chain}}) {
3397 $cmdlist .= "$cmd\n";
3398 }
3399 }
3400 }
3401
3402 foreach my $chain (keys %$ruleset) {
3403 my $stat = $statushash->{$chain};
3404 die "internal error" if !$stat;
3405
3406 if ($stat->{action} eq 'update') {
3407 my $chain_swap = $chain."_swap";
3408
3409 foreach my $cmd (@{$ruleset->{$chain}}) {
3410 $cmd =~ s/$chain/$chain_swap/;
3411 $cmdlist .= "$cmd\n";
3412 }
3413 $cmdlist .= "swap $chain_swap $chain\n";
3414 $cmdlist .= "flush $chain_swap\n";
3415 $cmdlist .= "destroy $chain_swap\n";
3416 }
3417 }
3418
3419 # the remove unused chains
3420 foreach my $chain (keys %$statushash) {
3421 next if $statushash->{$chain}->{action} ne 'delete';
3422
3423 $delete_cmdlist .= "flush $chain\n";
3424 $delete_cmdlist .= "destroy $chain\n";
3425 }
3426
3427 my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3428
3429 return ($cmdlist, $delete_cmdlist, $changes);
3430 }
3431
3432 sub apply_ruleset {
3433 my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3434
3435 enable_bridge_firewall();
3436
3437 my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3438 get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3439
3440 my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3441 my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3442
3443 if ($verbose) {
3444 if ($ipset_changes) {
3445 print "ipset changes:\n";
3446 print $ipset_create_cmdlist if $ipset_create_cmdlist;
3447 print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3448 }
3449
3450 if ($changes) {
3451 print "iptables changes:\n";
3452 print $cmdlist;
3453 }
3454
3455 if ($changesv6) {
3456 print "ip6tables changes:\n";
3457 print $cmdlistv6;
3458 }
3459 }
3460
3461 my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3462 PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3463
3464 ipset_restore_cmdlist($ipset_create_cmdlist);
3465
3466 $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3467 PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3468
3469 iptables_restore_cmdlist($cmdlist);
3470
3471 $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3472 PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3473
3474 ip6tables_restore_cmdlist($cmdlistv6);
3475
3476 $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3477 PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3478
3479 ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3480
3481 # test: re-read status and check if everything is up to date
3482 my $active_chains = iptables_get_chains();
3483 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3484
3485 my $errors;
3486 foreach my $chain (sort keys %$ruleset) {
3487 my $stat = $statushash->{$chain};
3488 if ($stat->{action} ne 'exists') {
3489 warn "unable to update chain '$chain'\n";
3490 $errors = 1;
3491 }
3492 }
3493
3494 my $active_chainsv6 = iptables_get_chains("ip6tables");
3495 my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3496
3497 foreach my $chain (sort keys %$rulesetv6) {
3498 my $stat = $statushashv6->{$chain};
3499 if ($stat->{action} ne 'exists') {
3500 warn "unable to update chain '$chain'\n";
3501 $errors = 1;
3502 }
3503 }
3504
3505 die "unable to apply firewall changes\n" if $errors;
3506
3507 update_nf_conntrack_max($hostfw_conf);
3508
3509 update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3510
3511 }
3512
3513 sub update_nf_conntrack_max {
3514 my ($hostfw_conf) = @_;
3515
3516 my $max = 65536; # reasonable default
3517
3518 my $options = $hostfw_conf->{options} || {};
3519
3520 if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3521 $max = $options->{nf_conntrack_max};
3522 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3523 }
3524
3525 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3526 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3527
3528 my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3529
3530 if ($current != $max) {
3531 my $hashsize = int($max/4);
3532 PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3533 PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3534 }
3535 }
3536
3537 sub update_nf_conntrack_tcp_timeout_established {
3538 my ($hostfw_conf) = @_;
3539
3540 my $options = $hostfw_conf->{options} || {};
3541
3542 my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3543
3544 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3545 }
3546
3547 sub remove_pvefw_chains {
3548
3549 PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3550 PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3551 PVE::Firewall::remove_pvefw_chains_ipset();
3552
3553 }
3554
3555 sub remove_pvefw_chains_iptables {
3556 my ($iptablescmd) = @_;
3557
3558 my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3559 my $cmdlist = "*filter\n";
3560
3561 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3562 if ($hooks->{$h}) {
3563 $cmdlist .= "-D $h -j PVEFW-$h\n";
3564 }
3565 }
3566
3567 foreach my $chain (keys %$chash) {
3568 $cmdlist .= "-F $chain\n";
3569 }
3570
3571 foreach my $chain (keys %$chash) {
3572 $cmdlist .= "-X $chain\n";
3573 }
3574 $cmdlist .= "COMMIT\n";
3575
3576 if($iptablescmd eq "ip6tables") {
3577 ip6tables_restore_cmdlist($cmdlist);
3578 } else {
3579 iptables_restore_cmdlist($cmdlist);
3580 }
3581 }
3582
3583 sub remove_pvefw_chains_ipset {
3584
3585 my $ipset_chains = ipset_get_chains();
3586
3587 my $cmdlist = "";
3588
3589 foreach my $chain (keys %$ipset_chains) {
3590 $cmdlist .= "flush $chain\n";
3591 $cmdlist .= "destroy $chain\n";
3592 }
3593
3594 ipset_restore_cmdlist($cmdlist) if $cmdlist;
3595 }
3596
3597 sub init {
3598 my $cluster_conf = load_clusterfw_conf();
3599 my $cluster_options = $cluster_conf->{options};
3600 my $enable = $cluster_options->{enable};
3601
3602 return if !$enable;
3603
3604 # load required modules here
3605 }
3606
3607 sub update {
3608 my $code = sub {
3609
3610 my $cluster_conf = load_clusterfw_conf();
3611 my $cluster_options = $cluster_conf->{options};
3612
3613 if (!$cluster_options->{enable}) {
3614 PVE::Firewall::remove_pvefw_chains();
3615 return;
3616 }
3617
3618 my $hostfw_conf = load_hostfw_conf($cluster_conf);
3619
3620 my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3621
3622 apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3623 };
3624
3625 run_locked($code);
3626 }
3627
3628 1;
Firewall test scripts