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start openvz support
[pve-firewall.git] / src / PVE / Firewall.pm
CommitLineData
b6360c3f
DM		 1package PVE::Firewall;
2
3use warnings;
4use strict;
5use Data::Dumper;
09d5f68e 6use Digest::SHA;
c8301d63
DM		 7use PVE::INotify;
8use PVE::Cluster;
5f0a912c 9use PVE::ProcFSTools;
f789653a 10use PVE::Tools;
b6360c3f 11use PVE::QemuServer;
c8301d63 12use PVE::OpenVZ; # dependeny problem?!
6b9f68a2 13use File::Basename;
5e1267a5
DM		 14use File::Path;
15use IO::File;
ecbea048 16use Net::IP;
06320eb0 17use PVE::Tools qw(run_command lock_file);
ecbea048 18
5e1267a5 19use Data::Dumper;
b6360c3f 20
c8301d63
DM		 21my $nodename = PVE::INotify::nodename();
22
06320eb0 23my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
6b9f68a2 24my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
06320eb0 25
2d404ffc
DM		 26my $default_log_level = 'info';
27
28my $log_level_hash = {
29 debug => 7,
30 info => 6,
31 notice => 5,
32 warning => 4,
33 err => 3,
34 crit => 2,
35 alert => 1,
36 emerg => 0,
37};
38
857f62c8 39# imported/converted from: /usr/share/shorewall/macro.*
961b4928 40my $pve_fw_macros = {
857f62c8
DM		 41 'Amanda' => [
42 { action => 'PARAM', proto => 'udp', dport => '10080' },
43 { action => 'PARAM', proto => 'tcp', dport => '10080' },
44 ],
45 'Auth' => [
46 { action => 'PARAM', proto => 'tcp', dport => '113' },
47 ],
48 'BGP' => [
49 { action => 'PARAM', proto => 'tcp', dport => '179' },
50 ],
51 'BitTorrent' => [
961b4928 52 { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
857f62c8
DM		 53 { action => 'PARAM', proto => 'udp', dport => '6881' },
54 ],
55 'BitTorrent32' => [
56 { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
57 { action => 'PARAM', proto => 'udp', dport => '6881' },
58 ],
59 'CVS' => [
60 { action => 'PARAM', proto => 'tcp', dport => '2401' },
61 ],
62 'Citrix' => [
63 { action => 'PARAM', proto => 'tcp', dport => '1494' },
64 { action => 'PARAM', proto => 'udp', dport => '1604' },
65 { action => 'PARAM', proto => 'tcp', dport => '2598' },
66 ],
67 'DAAP' => [
68 { action => 'PARAM', proto => 'tcp', dport => '3689' },
69 { action => 'PARAM', proto => 'udp', dport => '3689' },
70 ],
71 'DCC' => [
72 { action => 'PARAM', proto => 'tcp', dport => '6277' },
73 ],
74 'DHCPfwd' => [
75 { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
76 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' },
77 ],
78 'DNS' => [
79 { action => 'PARAM', proto => 'udp', dport => '53' },
80 { action => 'PARAM', proto => 'tcp', dport => '53' },
81 ],
82 'Distcc' => [
83 { action => 'PARAM', proto => 'tcp', dport => '3632' },
84 ],
85 'Edonkey' => [
86 { action => 'PARAM', proto => 'tcp', dport => '4662' },
87 { action => 'PARAM', proto => 'udp', dport => '4665' },
961b4928 88 ],
857f62c8
DM		 89 'FTP' => [
90 { action => 'PARAM', proto => 'tcp', dport => '21' },
91 ],
92 'Finger' => [
93 { action => 'PARAM', proto => 'tcp', dport => '79' },
94 ],
95 'GNUnet' => [
96 { action => 'PARAM', proto => 'tcp', dport => '2086' },
97 { action => 'PARAM', proto => 'udp', dport => '2086' },
98 { action => 'PARAM', proto => 'tcp', dport => '1080' },
99 { action => 'PARAM', proto => 'udp', dport => '1080' },
100 ],
101 'GRE' => [
102 { action => 'PARAM', proto => '47' },
103 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
104 ],
105 'Git' => [
106 { action => 'PARAM', proto => 'tcp', dport => '9418' },
107 ],
108 'Gnutella' => [
109 { action => 'PARAM', proto => 'tcp', dport => '6346' },
110 { action => 'PARAM', proto => 'udp', dport => '6346' },
111 ],
112 'HKP' => [
113 { action => 'PARAM', proto => 'tcp', dport => '11371' },
114 ],
115 'HTTP' => [
961b4928
DM		 116 { action => 'PARAM', proto => 'tcp', dport => '80' },
117 ],
857f62c8
DM		 118 'HTTPS' => [
119 { action => 'PARAM', proto => 'tcp', dport => '443' },
120 ],
121 'ICPV2' => [
122 { action => 'PARAM', proto => 'udp', dport => '3130' },
123 ],
124 'ICQ' => [
125 { action => 'PARAM', proto => 'tcp', dport => '5190' },
126 ],
127 'IMAP' => [
128 { action => 'PARAM', proto => 'tcp', dport => '143' },
129 ],
130 'IMAPS' => [
131 { action => 'PARAM', proto => 'tcp', dport => '993' },
132 ],
133 'IPIP' => [
134 { action => 'PARAM', proto => '94' },
135 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' },
136 ],
137 'IPP' => [
138 { action => 'PARAM', proto => 'tcp', dport => '631' },
139 ],
140 'IPPbrd' => [
141 { action => 'PARAM', proto => 'udp', dport => '631' },
142 ],
143 'IPPserver' => [
144 { action => 'PARAM', source => 'SOURCE', dest => 'DEST', proto => 'tcp', dport => '631' },
145 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '631' },
146 ],
147 'IPsec' => [
148 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
149 { action => 'PARAM', proto => '50' },
150 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
151 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
152 ],
153 'IPsecah' => [
154 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
155 { action => 'PARAM', proto => '51' },
156 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
157 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' },
158 ],
159 'IPsecnat' => [
160 { action => 'PARAM', proto => 'udp', dport => '500' },
161 { action => 'PARAM', proto => 'udp', dport => '4500' },
162 { action => 'PARAM', proto => '50' },
163 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' },
164 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' },
165 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
166 ],
167 'IRC' => [
168 { action => 'PARAM', proto => 'tcp', dport => '6667' },
169 ],
170 'JabberPlain' => [
171 { action => 'PARAM', proto => 'tcp', dport => '5222' },
172 ],
173 'JabberSecure' => [
174 { action => 'PARAM', proto => 'tcp', dport => '5223' },
175 ],
176 'Jabberd' => [
177 { action => 'PARAM', proto => 'tcp', dport => '5269' },
178 ],
179 'Jetdirect' => [
180 { action => 'PARAM', proto => 'tcp', dport => '9100' },
181 ],
182 'L2TP' => [
183 { action => 'PARAM', proto => 'udp', dport => '1701' },
184 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' },
185 ],
186 'LDAP' => [
187 { action => 'PARAM', proto => 'tcp', dport => '389' },
188 ],
189 'LDAPS' => [
190 { action => 'PARAM', proto => 'tcp', dport => '636' },
191 ],
192 'MSNP' => [
193 { action => 'PARAM', proto => 'tcp', dport => '1863' },
194 ],
195 'MSSQL' => [
196 { action => 'PARAM', proto => 'tcp', dport => '1433' },
197 ],
198 'Mail' => [
199 { action => 'PARAM', proto => 'tcp', dport => '25' },
200 { action => 'PARAM', proto => 'tcp', dport => '465' },
201 { action => 'PARAM', proto => 'tcp', dport => '587' },
202 ],
203 'Munin' => [
204 { action => 'PARAM', proto => 'tcp', dport => '4949' },
205 ],
206 'MySQL' => [
207 { action => 'PARAM', proto => 'tcp', dport => '3306' },
208 ],
209 'NNTP' => [
210 { action => 'PARAM', proto => 'tcp', dport => '119' },
211 ],
212 'NNTPS' => [
213 { action => 'PARAM', proto => 'tcp', dport => '563' },
214 ],
215 'NTP' => [
216 { action => 'PARAM', proto => 'udp', dport => '123' },
217 ],
218 'NTPbi' => [
219 { action => 'PARAM', proto => 'udp', dport => '123' },
220 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' },
221 ],
222 'NTPbrd' => [
223 { action => 'PARAM', proto => 'udp', dport => '123' },
224 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '123' },
225 ],
226 'OSPF' => [
227 { action => 'PARAM', proto => '89' },
228 ],
229 'OpenVPN' => [
230 { action => 'PARAM', proto => 'udp', dport => '1194' },
231 ],
232 'PCA' => [
233 { action => 'PARAM', proto => 'udp', dport => '5632' },
234 { action => 'PARAM', proto => 'tcp', dport => '5631' },
235 ],
236 'POP3' => [
237 { action => 'PARAM', proto => 'tcp', dport => '110' },
238 ],
239 'POP3S' => [
240 { action => 'PARAM', proto => 'tcp', dport => '995' },
241 ],
242 'PPtP' => [
243 { action => 'PARAM', proto => '47' },
244 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
245 { action => 'PARAM', proto => 'tcp', dport => '1723' },
246 ],
247 'Ping' => [
269d4f13 248 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
857f62c8
DM		 249 ],
250 'PostgreSQL' => [
251 { action => 'PARAM', proto => 'tcp', dport => '5432' },
252 ],
253 'Printer' => [
254 { action => 'PARAM', proto => 'tcp', dport => '515' },
255 ],
256 'RDP' => [
257 { action => 'PARAM', proto => 'tcp', dport => '3389' },
258 ],
259 'RIPbi' => [
260 { action => 'PARAM', proto => 'udp', dport => '520' },
261 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' },
262 ],
263 'RNDC' => [
264 { action => 'PARAM', proto => 'tcp', dport => '953' },
265 ],
266 'Razor' => [
267 { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
268 ],
269 'Rdate' => [
270 { action => 'PARAM', proto => 'tcp', dport => '37' },
271 ],
272 'Rsync' => [
273 { action => 'PARAM', proto => 'tcp', dport => '873' },
274 ],
275 'SANE' => [
276 { action => 'PARAM', proto => 'tcp', dport => '6566' },
277 ],
278 'SMB' => [
279 { action => 'PARAM', proto => 'udp', dport => '135,445' },
280 { action => 'PARAM', proto => 'udp', dport => '137:139' },
281 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
282 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
283 ],
284 'SMBBI' => [
285 { action => 'PARAM', proto => 'udp', dport => '135,445' },
286 { action => 'PARAM', proto => 'udp', dport => '137:139' },
287 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
288 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
289 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' },
290 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' },
291 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' },
292 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' },
293 ],
294 'SMBswat' => [
295 { action => 'PARAM', proto => 'tcp', dport => '901' },
296 ],
297 'SMTP' => [
298 { action => 'PARAM', proto => 'tcp', dport => '25' },
299 ],
300 'SMTPS' => [
301 { action => 'PARAM', proto => 'tcp', dport => '465' },
302 ],
303 'SNMP' => [
304 { action => 'PARAM', proto => 'udp', dport => '161:162' },
305 { action => 'PARAM', proto => 'tcp', dport => '161' },
306 ],
307 'SPAMD' => [
308 { action => 'PARAM', proto => 'tcp', dport => '783' },
309 ],
310 'SSH' => [
311 { action => 'PARAM', proto => 'tcp', dport => '22' },
312 ],
313 'SVN' => [
314 { action => 'PARAM', proto => 'tcp', dport => '3690' },
315 ],
316 'SixXS' => [
317 { action => 'PARAM', proto => 'tcp', dport => '3874' },
318 { action => 'PARAM', proto => 'udp', dport => '3740' },
319 { action => 'PARAM', proto => '41' },
320 { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
321 ],
322 'Squid' => [
323 { action => 'PARAM', proto => 'tcp', dport => '3128' },
324 ],
325 'Submission' => [
326 { action => 'PARAM', proto => 'tcp', dport => '587' },
327 ],
328 'Syslog' => [
329 { action => 'PARAM', proto => 'udp', dport => '514' },
330 { action => 'PARAM', proto => 'tcp', dport => '514' },
331 ],
332 'TFTP' => [
333 { action => 'PARAM', proto => 'udp', dport => '69' },
334 ],
335 'Telnet' => [
336 { action => 'PARAM', proto => 'tcp', dport => '23' },
337 ],
338 'Telnets' => [
339 { action => 'PARAM', proto => 'tcp', dport => '992' },
340 ],
341 'Time' => [
342 { action => 'PARAM', proto => 'tcp', dport => '37' },
343 ],
344 'Trcrt' => [
345 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
269d4f13 346 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
857f62c8
DM		 347 ],
348 'VNC' => [
349 { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
350 ],
351 'VNCL' => [
352 { action => 'PARAM', proto => 'tcp', dport => '5500' },
353 ],
354 'Web' => [
355 { action => 'PARAM', proto => 'tcp', dport => '80' },
961b4928
DM		 356 { action => 'PARAM', proto => 'tcp', dport => '443' },
357 ],
857f62c8
DM		 358 'Webcache' => [
359 { action => 'PARAM', proto => 'tcp', dport => '8080' },
360 ],
361 'Webmin' => [
362 { action => 'PARAM', proto => 'tcp', dport => '10000' },
363 ],
364 'Whois' => [
365 { action => 'PARAM', proto => 'tcp', dport => '43' },
366 ],
961b4928
DM		 367};
368
369my $pve_fw_parsed_macros;
370my $pve_fw_preferred_macro_names = {};
3a616aa0 371
d8f2505e
DM		 372my $pve_std_chains = {
373 'PVEFW-SET-ACCEPT-MARK' => [
374 "-j MARK --set-mark 1",
375 ],
79929d9c
DM		 376 'PVEFW-DropBroadcast' => [
377 # same as shorewall 'Broadcast'
378 # simply DROP BROADCAST/MULTICAST/ANYCAST
379 # we can use this to reduce logging
380 { action => 'DROP', dsttype => 'BROADCAST' },
381 { action => 'DROP', dsttype => 'MULTICAST' },
382 { action => 'DROP', dsttype => 'ANYCAST' },
383 { action => 'DROP', dest => '224.0.0.0/4' },
384 ],
385 'PVEFW-reject' => [
386 # same as shorewall 'reject'
387 { action => 'DROP', dsttype => 'BROADCAST' },
388 { action => 'DROP', source => '224.0.0.0/4' },
389 { action => 'DROP', proto => 'icmp' },
390 "-p tcp -j REJECT --reject-with tcp-reset",
391 "-p udp -j REJECT --reject-with icmp-port-unreachable",
392 "-p icmp -j REJECT --reject-with icmp-host-unreachable",
393 "-j REJECT --reject-with icmp-host-prohibited",
394 ],
395 'PVEFW-Drop' => [
396 # same as shorewall 'Drop', which is equal to DROP,
397 # but REJECT/DROP some packages to reduce logging,
398 # and ACCEPT critical ICMP types
399 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
400 # we are not interested in BROADCAST/MULTICAST/ANYCAST
401 { action => 'PVEFW-DropBroadcast' },
402 # ACCEPT critical ICMP types
403 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
404 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
405 # Drop packets with INVALID state
406 "-m conntrack --ctstate INVALID -j DROP",
407 # Drop Microsoft SMB noise
408 { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
409 { action => 'DROP', proto => 'udp', dport => '137:139'},
410 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
411 { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
412 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
413 # Drop new/NotSyn traffic so that it doesn't get logged
414 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
415 # Drop DNS replies
416 { action => 'DROP', proto => 'udp', sport => 53 },
417 ],
418 'PVEFW-Reject' => [
419 # same as shorewall 'Reject', which is equal to Reject,
420 # but REJECT/DROP some packages to reduce logging,
421 # and ACCEPT critical ICMP types
422 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
423 # we are not interested in BROADCAST/MULTICAST/ANYCAST
424 { action => 'PVEFW-DropBroadcast' },
425 # ACCEPT critical ICMP types
426 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
427 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
428 # Drop packets with INVALID state
429 "-m conntrack --ctstate INVALID -j DROP",
430 # Drop Microsoft SMB noise
431 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
432 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
433 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
434 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
435 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
436 # Drop new/NotSyn traffic so that it doesn't get logged
437 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
438 # Drop DNS replies
439 { action => 'DROP', proto => 'udp', sport => 53 },
440 ],
d86659ef
DM		 441 'PVEFW-tcpflags' => [
442 # same as shorewall tcpflags action.
443 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
444 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
445 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
446 "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
447 "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
448 "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
449 ],
bee633ab
DM		 450 'PVEFW-smurfs' => [
451 # same as shorewall smurfs action
452 # Filter packets for smurfs (packets with a broadcast address as the source).
453 "-s 0.0.0.0/32 -j RETURN",
454 "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
455 "-s 224.0.0.0/4 -g PVEFW-smurflog",
456 ],
d8f2505e
DM		 457};
458
4b586518
DM		 459# iptables -p icmp -h
460my $icmp_type_names = {
461 any => 1,
462 'echo-reply' => 1,
463 'destination-unreachable' => 1,
464 'network-unreachable' => 1,
465 'host-unreachable' => 1,
466 'protocol-unreachable' => 1,
467 'port-unreachable' => 1,
468 'fragmentation-needed' => 1,
469 'source-route-failed' => 1,
470 'network-unknown' => 1,
471 'host-unknown' => 1,
472 'network-prohibited' => 1,
473 'host-prohibited' => 1,
474 'TOS-network-unreachable' => 1,
475 'TOS-host-unreachable' => 1,
476 'communication-prohibited' => 1,
477 'host-precedence-violation' => 1,
478 'precedence-cutoff' => 1,
479 'source-quench' => 1,
480 'redirect' => 1,
481 'network-redirect' => 1,
482 'host-redirect' => 1,
483 'TOS-network-redirect' => 1,
484 'TOS-host-redirect' => 1,
485 'echo-request' => 1,
486 'router-advertisement' => 1,
487 'router-solicitation' => 1,
488 'time-exceeded' => 1,
489 'ttl-zero-during-transit' => 1,
490 'ttl-zero-during-reassembly' => 1,
491 'parameter-problem' => 1,
492 'ip-header-bad' => 1,
493 'required-option-missing' => 1,
494 'timestamp-request' => 1,
495 'timestamp-reply' => 1,
496 'address-mask-request' => 1,
497 'address-mask-reply' => 1,
498};
499
a332200b 500sub get_firewall_macros {
9aab3127 501
961b4928 502 return $pve_fw_parsed_macros if $pve_fw_parsed_macros;
6158271d 503
961b4928 504 $pve_fw_parsed_macros = {};
9aab3127 505
961b4928
DM		 506 foreach my $k (keys %$pve_fw_macros) {
507 my $name = lc($k);
a332200b 508
961b4928
DM		 509 my $macro = $pve_fw_macros->{$k};
510 $pve_fw_preferred_macro_names->{$name} = $k;
511 $pve_fw_parsed_macros->{$name} = $macro;
512 }
a332200b 513
961b4928 514 return $pve_fw_parsed_macros;
9aab3127
DM		 515}
516
fcba0beb
DM		 517my $etc_services;
518
519sub get_etc_services {
520
521 return $etc_services if $etc_services;
522
523 my $filename = "/etc/services";
524
525 my $fh = IO::File->new($filename, O_RDONLY);
526 if (!$fh) {
527 warn "unable to read '$filename' - $!\n";
528 return {};
529 }
530
531 my $services = {};
532
533 while (my $line = <$fh>) {
534 chomp ($line);
535 next if $line =~m/^#/;
536 next if ($line =~m/^\s*$/);
537
538 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
539 $services->{byid}->{$2}->{name} = $1;
35b66e9d 540 $services->{byid}->{$2}->{port} = $2;
fcba0beb
DM		 541 $services->{byid}->{$2}->{$3} = 1;
542 $services->{byname}->{$1} = $services->{byid}->{$2};
543 }
544 }
545
546 close($fh);
547
6158271d
DM		 548 $etc_services = $services;
549
3a616aa0 550
fcba0beb
DM		 551 return $etc_services;
552}
553
554my $etc_protocols;
555
556sub get_etc_protocols {
557 return $etc_protocols if $etc_protocols;
558
559 my $filename = "/etc/protocols";
560
561 my $fh = IO::File->new($filename, O_RDONLY);
562 if (!$fh) {
563 warn "unable to read '$filename' - $!\n";
564 return {};
565 }
566
567 my $protocols = {};
568
569 while (my $line = <$fh>) {
570 chomp ($line);
571 next if $line =~m/^#/;
572 next if ($line =~m/^\s*$/);
573
574 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
575 $protocols->{byid}->{$2}->{name} = $1;
576 $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
577 }
578 }
579
580 close($fh);
581
582 $etc_protocols = $protocols;
583
584 return $etc_protocols;
585}
586
ecbea048
DM		 587sub parse_address_list {
588 my ($str) = @_;
589
d6de1dc2 590 my $nbaor = 0;
ecbea048
DM		 591 foreach my $aor (split(/,/, $str)) {
592 if (!Net::IP->new($aor)) {
593 my $err = Net::IP::Error();
594 die "invalid IP address: $err\n";
d6de1dc2
AD		 595 }else{
596 $nbaor++;
ecbea048
DM		 597 }
598 }
d6de1dc2 599 return $nbaor;
ecbea048 600}
dddd9413 601
fcba0beb
DM		 602sub parse_port_name_number_or_range {
603 my ($str) = @_;
604
605 my $services = PVE::Firewall::get_etc_services();
4cdbb3b7 606 my $nbports = 0;
fcba0beb 607 foreach my $item (split(/,/, $str)) {
4cdbb3b7 608 my $portlist = "";
35b66e9d 609 my $oldpon = undef;
4b586518 610 $nbports++;
fcba0beb 611 foreach my $pon (split(':', $item, 2)) {
35b66e9d 612 $pon = $services->{byname}->{$pon}->{port} if $services->{byname}->{$pon}->{port};
4cdbb3b7 613 if ($pon =~ m/^\d+$/){
857f62c8 614 die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535;
35b66e9d
AD		 615 die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon);
616 $oldpon = $pon;
4cdbb3b7
AD		 617 }else{
618 die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon};
619 }
fcba0beb
DM		 620 }
621 }
622
4cdbb3b7 623 return ($nbports);
fcba0beb
DM		 624}
625
780bcc0f
DM		 626my $bridge_firewall_enabled = 0;
627
628sub enable_bridge_firewall {
629
630 return if $bridge_firewall_enabled; # only once
631
5f0a912c
DM		 632 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
633 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
780bcc0f 634
6a8a75db
DM		 635 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
636 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
637
780bcc0f
DM		 638 $bridge_firewall_enabled = 1;
639}
640
8cebfa6f 641my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
dddd9413 642
3a616aa0
AD		 643sub iptables {
644 my ($cmd) = @_;
645
646 run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {});
647}
648
b16e818e
DM		 649sub iptables_restore_cmdlist {
650 my ($cmdlist) = @_;
3a616aa0 651
3fa83edf 652 run_command("/sbin/iptables-restore -n", input => $cmdlist);
3a616aa0
AD		 653}
654
de2a57cd
DM		 655sub iptables_get_chains {
656
657 my $res = {};
658
659 # check what chains we want to track
660 my $is_pvefw_chain = sub {
661 my $name = shift;
662
dec84fcd
DM		 663 return 1 if $name =~ m/^PVEFW-\S+$/;
664
de2a57cd 665 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
5927497d 666 return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT)$/;
f50656c2 667 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
de2a57cd
DM		 668
669 return undef;
670 };
671
672 my $table = '';
673
de2a57cd
DM		 674 my $parser = sub {
675 my $line = shift;
676
677 return if $line =~ m/^#/;
678 return if $line =~ m/^\s*$/;
679
680 if ($line =~ m/^\*(\S+)$/) {
681 $table = $1;
682 return;
683 }
684
685 return if $table ne 'filter';
686
687 if ($line =~ m/^:(\S+)\s/) {
688 my $chain = $1;
689 return if !&$is_pvefw_chain($chain);
3fa83edf 690 $res->{$chain} = "unknown";
09d5f68e 691 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
3fa83edf 692 my ($chain, $sig) = ($1, $2);
de2a57cd 693 return if !&$is_pvefw_chain($chain);
3fa83edf 694 $res->{$chain} = $sig;
de2a57cd
DM		 695 } else {
696 # simply ignore the rest
697 return;
698 }
699 };
700
701 run_command("/sbin/iptables-save", outfunc => $parser);
702
de2a57cd
DM		 703 return $res;
704}
705
3a616aa0
AD		 706sub iptables_chain_exist {
707 my ($chain) = @_;
708
709 eval{
710 iptables("-n --list $chain");
711 };
712 return undef if $@;
713
714 return 1;
715}
716
717sub iptables_rule_exist {
718 my ($rule) = @_;
719
720 eval{
721 iptables("-C $rule");
722 };
723 return undef if $@;
724
725 return 1;
726}
727
3fa83edf 728sub ruleset_generate_rule {
2f906466 729 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
3a616aa0 730
11bac5c2
DM		 731 return if $rule->{disable};
732
41524a58 733 my @cmd = ();
3a616aa0 734
41524a58
DM		 735 push @cmd, "-m iprange --src-range" if $rule->{nbsource} && $rule->{nbsource} > 1;
736 push @cmd, "-s $rule->{source}" if $rule->{source};
737 push @cmd, "-m iprange --dst-range" if $rule->{nbdest} && $rule->{nbdest} > 1;
738 push @cmd, "-d $rule->{dest}" if $rule->{dest};
4b586518 739
181390b0 740 if ($rule->{proto}) {
41524a58 741 push @cmd, "-p $rule->{proto}";
e3a1d391 742
181390b0
DM		 743 my $multiport = 0;
744 $multiport++ if $rule->{nbdport} && ($rule->{nbdport} > 1);
745 $multiport++ if $rule->{nbsport} && ($rule->{nbsport} > 1);
e3a1d391 746
41524a58 747 push @cmd, "--match multiport" if $multiport;
4b586518 748
181390b0
DM		 749 die "multiport: option '--sports' cannot be used together with '--dports'\n"
750 if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
751
752 if ($rule->{dport}) {
753 if ($rule->{proto} && $rule->{proto} eq 'icmp') {
754 # Note: we use dport to store --icmp-type
755 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
41524a58 756 push @cmd, "-m icmp --icmp-type $rule->{dport}";
181390b0
DM		 757 } else {
758 if ($rule->{nbdport} && $rule->{nbdport} > 1) {
759 if ($multiport == 2) {
41524a58 760 push @cmd, "--ports $rule->{dport}";
181390b0 761 } else {
41524a58 762 push @cmd, "--dports $rule->{dport}";
181390b0 763 }
e3a1d391 764 } else {
41524a58 765 push @cmd, "--dport $rule->{dport}";
e3a1d391 766 }
4b586518
DM		 767 }
768 }
4b586518 769
181390b0
DM		 770 if ($rule->{sport}) {
771 if ($rule->{nbsport} && $rule->{nbsport} > 1) {
41524a58 772 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
181390b0 773 } else {
41524a58 774 push @cmd, "--sport $rule->{sport}";
181390b0 775 }
4b586518 776 }
181390b0
DM		 777 } elsif ($rule->{dport} || $rule->{sport}) {
778 warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
779 warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
4b586518
DM		 780 }
781
41524a58 782 push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
4e6112f9
DM		 783
784 if (my $action = $rule->{action}) {
2f906466 785 $action = $actions->{$action} if defined($actions->{$action});
4e6112f9 786 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
41524a58 787 push @cmd, $goto ? "-g $action" : "-j $action";
181390b0 788 }
3a616aa0 789
41524a58
DM		 790 if (scalar(@cmd)) {
791 my $cmdstr = join(' ', @cmd);
792 ruleset_addrule($ruleset, $chain, $cmdstr);
793 }
3fa83edf
DM		 794}
795
796sub ruleset_create_chain {
797 my ($ruleset, $chain) = @_;
3a616aa0 798
d050c724
DM		 799 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
800
3fa83edf
DM		 801 die "chain '$chain' already exists\n" if $ruleset->{$chain};
802
803 $ruleset->{$chain} = [];
3a616aa0
AD		 804}
805
3fa83edf
DM		 806sub ruleset_chain_exist {
807 my ($ruleset, $chain) = @_;
3a616aa0 808
3fa83edf
DM		 809 return $ruleset->{$chain} ? 1 : undef;
810}
3a616aa0 811
3fa83edf
DM		 812sub ruleset_addrule {
813 my ($ruleset, $chain, $rule) = @_;
3a616aa0 814
3fa83edf 815 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 816
3fa83edf
DM		 817 push @{$ruleset->{$chain}}, "-A $chain $rule";
818}
3a616aa0 819
3fa83edf
DM		 820sub ruleset_insertrule {
821 my ($ruleset, $chain, $rule) = @_;
3a616aa0 822
3fa83edf 823 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 824
3fa83edf
DM		 825 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
826}
3a616aa0 827
3fa83edf 828sub generate_bridge_chains {
2f3d8d76
DM		 829 my ($ruleset, $hostfw_conf, $bridge) = @_;
830
6d2ab017 831 my $options = $hostfw_conf->{options} || {};
2f3d8d76
DM		 832
833 # fixme: what log level should we use here?
834 my $loglevel = get_option_log_level($options, "log_level_out");
3a616aa0 835
5927497d
DM		 836 if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
837 ruleset_create_chain($ruleset, "$bridge-FW");
838 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
839 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
2f3d8d76
DM		 840 # disable interbridge routing
841 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j PVEFW-Drop");
842 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j PVEFW-Drop");
843 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j LOG --log-prefix \"PVEFW-FORWARD-dropped \" --log-level $loglevel");
844 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j LOG --log-prefix \"PVEFW-FORWARD-dropped \" --log-level $loglevel");
845 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j DROP");
846 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j DROP");
3fa83edf 847 }
3a616aa0 848
3fa83edf
DM		 849 if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
850 ruleset_create_chain($ruleset, "$bridge-OUT");
5927497d 851 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-in -j $bridge-OUT");
12cc9946 852 ruleset_addrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-bridged --physdev-is-in -j $bridge-OUT");
9fcad984
AD		 853 }
854
855 if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
856 ruleset_create_chain($ruleset, "$bridge-IN");
5927497d 857 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j $bridge-IN");
fdb0bf20 858 ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
7323008d
DM		 859 # accept traffic to unmanaged bridge ports
860 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j ACCEPT ");
3fa83edf
DM		 861 }
862}
3a616aa0 863
ead850e8
DM		 864sub ruleset_add_chain_policy {
865 my ($ruleset, $chain, $policy, $loglevel, $accept_action) = @_;
866
867 if ($policy eq 'ACCEPT') {
868
869 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
870 { ACCEPT => $accept_action});
871
872 } elsif ($policy eq 'DROP') {
873
874 ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
875
876 ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"$chain-dropped: \" --log-level $loglevel")
877 if defined($loglevel);
878
879 ruleset_addrule($ruleset, $chain, "-j DROP");
880 } elsif ($policy eq 'REJECT') {
881 ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
882
883 ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"$chain-reject: \" --log-level $loglevel")
884 if defined($loglevel);
885
886 ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
887 } else {
888 # should not happen
889 die "internal error: unknown policy '$policy'";
890 }
891}
892
3a616aa0 893sub generate_tap_rules_direction {
92e976b3 894 my ($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, $direction) = @_;
fa9c4a6f 895
178a63be 896 my $lc_direction = lc($direction);
92e976b3
DM		 897
898 my $rules = $vmfw_conf->{rules};
178a63be 899
fa9c4a6f 900 my $options = $vmfw_conf->{options};
178a63be 901 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
3a616aa0
AD		 902
903 my $tapchain = "$iface-$direction";
904
3fa83edf 905 ruleset_create_chain($ruleset, $tapchain);
3a616aa0 906
bee633ab
DM		 907 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
908 ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
909 }
910
ce15d90b
DM		 911 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
912 ruleset_addrule($ruleset, $tapchain, "-p udp -m udp --dport 67:68 -j ACCEPT");
913 }
914
bee633ab
DM		 915 if ($options->{tcpflags}) {
916 ruleset_addrule($ruleset, $tapchain, "-p tcp -j PVEFW-tcpflags");
917 }
918
7fab95bc
DM		 919 ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate INVALID -j DROP");
920 ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
3a616aa0 921
b21aca2c
DM		 922 if ($direction eq 'OUT') {
923 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
924 ruleset_addrule($ruleset, $tapchain, "-m mac ! --mac-source $macaddr -j DROP");
925 }
926 ruleset_addrule($ruleset, $tapchain, "-j MARK --set-mark 0"); # clear mark
c29f55c9
DM		 927 }
928
92e976b3
DM		 929 foreach my $rule (@$rules) {
930 next if $rule->{iface} && $rule->{iface} ne $netid;
931 next if $rule->{disable};
932 if ($rule->{type} eq 'group') {
933 my $group_chain = "GROUP-$rule->{action}-$direction";
934 if(!ruleset_chain_exist($ruleset, $group_chain)){
935 generate_group_rules($ruleset, $groups_conf, $rule->{action});
936 }
937 ruleset_addrule($ruleset, $tapchain, "-j $group_chain");
938 ruleset_addrule($ruleset, $tapchain, "-m mark --mark 1 -j RETURN")
939 if $direction eq 'OUT';
940 } else {
941 next if $rule->{type} ne $lc_direction;
942 if ($direction eq 'OUT') {
943 ruleset_generate_rule($ruleset, $tapchain, $rule,
944 { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
4e6112f9 945 } else {
92e976b3 946 ruleset_generate_rule($ruleset, $tapchain, $rule, { REJECT => "PVEFW-reject" });
3a616aa0 947 }
4e6112f9 948 }
3a616aa0
AD		 949 }
950
ccae0b50
DM		 951 # implement policy
952 my $policy;
953
954 if ($direction eq 'OUT') {
72f63fde 955 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
ccae0b50 956 } else {
72f63fde 957 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
ccae0b50
DM		 958 }
959
ead850e8
DM		 960 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : "ACCEPT";
961 ruleset_add_chain_policy($ruleset, $tapchain, $policy, $loglevel, $accept_action);
3a616aa0 962
3fa83edf
DM		 963 # plug the tap chain to bridge chain
964 my $physdevdirection = $direction eq 'IN' ? "out" : "in";
965 my $rule = "-m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain";
966 ruleset_insertrule($ruleset, "$bridge-$direction", $rule);
3a616aa0
AD		 967}
968
d18c1e2b 969sub enable_host_firewall {
92e976b3 970 my ($ruleset, $hostfw_conf, $groups_conf) = @_;
0bd5f137 971
51bae274 972 # fixme: allow security groups
0bd5f137 973
92e976b3
DM		 974 my $options = $hostfw_conf->{options};
975 my $rules = $hostfw_conf->{rules};
178a63be 976
3fa83edf 977 # host inbound firewall
dec84fcd
DM		 978 my $chain = "PVEFW-HOST-IN";
979 ruleset_create_chain($ruleset, $chain);
0bd5f137 980
178a63be
DM		 981 my $loglevel = get_option_log_level($options, "log_level_in");
982
7fab95bc
DM		 983 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
984 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
dec84fcd
DM		 985 ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
986 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
7fab95bc 987 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
dec84fcd 988 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 989
23e888f8
DM		 990 # we use RETURN because we need to check also tap rules
991 my $accept_action = 'RETURN';
992
92e976b3
DM		 993 foreach my $rule (@$rules) {
994 next if $rule->{type} ne 'in';
23e888f8 995 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
0bd5f137
AD		 996 }
997
23e888f8 998 # implement input policy
72f63fde 999 my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
23e888f8 1000 ruleset_add_chain_policy($ruleset, $chain, $policy, $loglevel, $accept_action);
0bd5f137 1001
3fa83edf 1002 # host outbound firewall
aadd745e 1003 $chain = "PVEFW-HOST-OUT";
dec84fcd
DM		 1004 ruleset_create_chain($ruleset, $chain);
1005
178a63be
DM		 1006 $loglevel = get_option_log_level($options, "log_level_out");
1007
7fab95bc
DM		 1008 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1009 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
dec84fcd
DM		 1010 ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1011 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
7fab95bc 1012 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
dec84fcd 1013 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 1014
23e888f8
DM		 1015 # we use RETURN because we may want to check other thigs later
1016 $accept_action = 'RETURN';
1017
92e976b3
DM		 1018 foreach my $rule (@$rules) {
1019 next if $rule->{type} ne 'out';
23e888f8 1020 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
0bd5f137
AD		 1021 }
1022
23e888f8 1023 # implement output policy
72f63fde 1024 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
23e888f8 1025 ruleset_add_chain_policy($ruleset, $chain, $policy, $loglevel, $accept_action);
6158271d 1026
dec84fcd
DM		 1027 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1028 ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
9d31b418
AD		 1029}
1030
1031sub generate_group_rules {
92e976b3 1032 my ($ruleset, $groups_conf, $group) = @_;
9d31b418 1033
92e976b3 1034 die "no such security group '$group'\n" if !$groups_conf->{$group};
9d31b418 1035
92e976b3 1036 my $rules = $groups_conf->{$group}->{rules};
6158271d 1037
3fa83edf 1038 my $chain = "GROUP-${group}-IN";
9d31b418 1039
3fa83edf 1040 ruleset_create_chain($ruleset, $chain);
9d31b418 1041
92e976b3
DM		 1042 foreach my $rule (@$rules) {
1043 next if $rule->{type} ne 'in';
1044 ruleset_generate_rule($ruleset, $chain, $rule, { REJECT => "PVEFW-reject" });
9d31b418
AD		 1045 }
1046
3fa83edf 1047 $chain = "GROUP-${group}-OUT";
9d31b418 1048
3fa83edf 1049 ruleset_create_chain($ruleset, $chain);
4e6112f9 1050 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
9d31b418 1051
92e976b3
DM		 1052 foreach my $rule (@$rules) {
1053 next if $rule->{type} ne 'out';
1054 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1055 # check also other tap rules later
1056 ruleset_generate_rule($ruleset, $chain, $rule,
1057 { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
9d31b418 1058 }
9d31b418
AD		 1059}
1060
51bae274
DM		 1061my $MAX_NETS = 32;
1062my $valid_netdev_names = {};
1063for (my $i = 0; $i < $MAX_NETS; $i++) {
1064 $valid_netdev_names->{"net$i"} = 1;
1065}
5e1267a5 1066
51bae274
DM		 1067sub parse_fw_rule {
1068 my ($line, $need_iface, $allow_groups) = @_;
5e1267a5 1069
a332200b 1070 my $macros = get_firewall_macros();
fcba0beb 1071 my $protocols = get_etc_protocols();
51bae274 1072
92e976b3 1073 my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
51bae274 1074
11bac5c2
DM		 1075 # we can add single line comments to the end of the rule
1076 my $comment = $1 if $line =~ s/#\s*(.*?)\s*$//;
1077
1078 # we can disable a rule when prefixed with '|'
1079 my $disable = 1 if $line =~ s/^\|//;
51bae274
DM		 1080
1081 my @data = split(/\s+/, $line);
92e976b3 1082 my $expected_elements = $need_iface ? 8 : 7;
51bae274
DM		 1083
1084 die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1085
1086 if ($need_iface) {
92e976b3 1087 ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
51bae274 1088 } else {
92e976b3 1089 ($type, $action, $source, $dest, $proto, $dport, $sport) = @data;
51bae274
DM		 1090 }
1091
92e976b3 1092 die "incomplete rule\n" if ! ($type && $action);
51bae274 1093
961b4928
DM		 1094 my $macro;
1095 my $macro_name;
1096
92e976b3
DM		 1097 $type = lc($type);
1098
1099 if ($type eq 'in' || $type eq 'out') {
1100 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1101 # OK
1102 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1103 ($macro_name, $action) = ($1, $2);
1104 my $lc_macro_name = lc($macro_name);
1105 my $preferred_name = $pve_fw_preferred_macro_names->{$lc_macro_name};
1106 $macro_name = $preferred_name if $preferred_name;
1107 $macro = $macros->{$lc_macro_name};
1108 die "unknown macro '$macro_name'\n" if !$macro;
1109 } else {
1110 die "unknown action '$action'\n";
1111 }
1112 } elsif ($type eq 'group') {
1113 die "wrong number of rule elements\n" if scalar(@data) != 3;
1114 die "groups disabled\n" if !$allow_groups;
1115
1116 die "invalid characters in group name\n" if $action !~ m/^[A-Za-z0-9_\-]+$/;
51bae274 1117 } else {
92e976b3 1118 die "unknown rule type '$type'\n";
51bae274
DM		 1119 }
1120
1121 if ($need_iface) {
1122 $iface = undef if $iface && $iface eq '-';
6158271d 1123 die "unknown interface '$iface'\n"
51bae274
DM		 1124 if defined($iface) && !$valid_netdev_names->{$iface};
1125 }
1126
1127 $proto = undef if $proto && $proto eq '-';
6158271d 1128 die "unknown protokol '$proto'\n" if $proto &&
51bae274
DM		 1129 !(defined($protocols->{byname}->{$proto}) ||
1130 defined($protocols->{byid}->{$proto}));
1131
1132 $source = undef if $source && $source eq '-';
1133 $dest = undef if $dest && $dest eq '-';
1134
1135 $dport = undef if $dport && $dport eq '-';
1136 $sport = undef if $sport && $sport eq '-';
1137
51bae274
DM		 1138 my $nbsource = undef;
1139 my $nbdest = undef;
1140
1141 $nbsource = parse_address_list($source) if $source;
1142 $nbdest = parse_address_list($dest) if $dest;
6158271d 1143
961b4928 1144 my $rules = [];
51bae274 1145
961b4928 1146 my $param = {
92e976b3 1147 type => $type,
11bac5c2
DM		 1148 disable => $disable,
1149 comment => $comment,
51bae274 1150 action => $action,
51bae274
DM		 1151 iface => $iface,
1152 source => $source,
1153 dest => $dest,
1154 nbsource => $nbsource,
1155 nbdest => $nbdest,
1156 proto => $proto,
1157 dport => $dport,
1158 sport => $sport,
51bae274 1159 };
961b4928
DM		 1160
1161 if ($macro) {
1162 foreach my $templ (@$macro) {
1163 my $rule = {};
faf7be7e 1164 my $param_used = {};
961b4928
DM		 1165 foreach my $k (keys %$templ) {
1166 my $v = $templ->{$k};
857f62c8
DM		 1167 if ($v eq 'PARAM') {
1168 $v = $param->{$k};
faf7be7e 1169 $param_used->{$k} = 1;
857f62c8
DM		 1170 } elsif ($v eq 'DEST') {
1171 $v = $param->{dest};
faf7be7e 1172 $param_used->{dest} = 1;
857f62c8
DM		 1173 } elsif ($v eq 'SOURCE') {
1174 $v = $param->{source};
faf7be7e 1175 $param_used->{source} = 1;
857f62c8
DM		 1176 }
1177
961b4928
DM		 1178 die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
1179 $rule->{$k} = $v;
1180 }
faf7be7e
DM		 1181 foreach my $k (keys %$param) {
1182 next if !defined($param->{$k});
1183 next if $param_used->{$k};
1184 if (defined($rule->{$k})) {
1185 die "parameter '$k' already define in macro (value = '$rule->{$k}')\n"
1186 if $rule->{$k} ne $param->{$k};
1187 } else {
1188 $rule->{$k} = $param->{$k};
1189 }
1190 }
961b4928
DM		 1191 push @$rules, $rule;
1192 }
1193 } else {
1194 push @$rules, $param;
1195 }
1196
1197 foreach my $rule (@$rules) {
6158271d 1198 $rule->{nbdport} = parse_port_name_number_or_range($rule->{dport})
961b4928 1199 if defined($rule->{dport});
6158271d 1200 $rule->{nbsport} = parse_port_name_number_or_range($rule->{sport})
961b4928
DM		 1201 if defined($rule->{sport});
1202 }
1203
1204 return $rules;
51bae274
DM		 1205}
1206
2d404ffc 1207sub parse_vmfw_option {
85c6eaed
DM		 1208 my ($line) = @_;
1209
1210 my ($opt, $value);
1211
178a63be
DM		 1212 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1213
ce15d90b 1214 if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
9c6b6efd
DM		 1215 $opt = lc($1);
1216 $value = int($2);
178a63be
DM		 1217 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1218 $opt = lc($1);
1219 $value = $2 ? lc($3) : '';
72f63fde 1220 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
85c6eaed
DM		 1221 $opt = lc($1);
1222 $value = uc($3);
9c6b6efd 1223 } else {
85c6eaed
DM		 1224 chomp $line;
1225 die "can't parse option '$line'\n"
1226 }
1227
1228 return ($opt, $value);
1229}
1230
2d404ffc
DM		 1231sub parse_hostfw_option {
1232 my ($line) = @_;
1233
1234 my ($opt, $value);
1235
1236 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1237
1238 if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
1239 $opt = lc($1);
1240 $value = int($2);
178a63be 1241 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2d404ffc
DM		 1242 $opt = lc($1);
1243 $value = $2 ? lc($3) : '';
72f63fde 1244 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2d404ffc
DM		 1245 $opt = lc($1);
1246 $value = uc($3);
490cdead
DM		 1247 } elsif ($line =~ m/^(nf_conntrack_max):\s*(\d+)\s*$/i) {
1248 $opt = lc($1);
1249 $value = int($2);
2d404ffc
DM		 1250 } else {
1251 chomp $line;
1252 die "can't parse option '$line'\n"
1253 }
1254
1255 return ($opt, $value);
1256}
1257
51bae274
DM		 1258sub parse_vm_fw_rules {
1259 my ($filename, $fh) = @_;
1260
92e976b3 1261 my $res = { rules => [], options => {}};
51bae274
DM		 1262
1263 my $section;
1264
5e1267a5
DM		 1265 while (defined(my $line = <$fh>)) {
1266 next if $line =~ m/^#/;
1267 next if $line =~ m/^\s*$/;
1268
961b4928
DM		 1269 my $linenr = $fh->input_line_number();
1270 my $prefix = "$filename (line $linenr)";
1271
85c6eaed 1272 if ($line =~ m/^\[(\S+)\]\s*$/i) {
5e1267a5 1273 $section = lc($1);
85c6eaed 1274 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
5e1267a5
DM		 1275 next;
1276 }
51bae274 1277 if (!$section) {
961b4928 1278 warn "$prefix: skip line - no section";
5e1267a5
DM		 1279 next;
1280 }
1281
85c6eaed
DM		 1282 next if !$res->{$section}; # skip undefined section
1283
1284 if ($section eq 'options') {
6158271d 1285 eval {
2d404ffc 1286 my ($opt, $value) = parse_vmfw_option($line);
85c6eaed
DM		 1287 $res->{options}->{$opt} = $value;
1288 };
1289 warn "$prefix: $@" if $@;
1290 next;
1291 }
1292
961b4928
DM		 1293 my $rules;
1294 eval { $rules = parse_fw_rule($line, 1, 1); };
51bae274 1295 if (my $err = $@) {
961b4928 1296 warn "$prefix: $err";
5e1267a5
DM		 1297 next;
1298 }
1299
961b4928 1300 push @{$res->{$section}}, @$rules;
51bae274
DM		 1301 }
1302
1303 return $res;
1304}
1305
1306sub parse_host_fw_rules {
1307 my ($filename, $fh) = @_;
1308
92e976b3 1309 my $res = { rules => [], options => {}};
51bae274
DM		 1310
1311 my $section;
1312
1313 while (defined(my $line = <$fh>)) {
1314 next if $line =~ m/^#/;
1315 next if $line =~ m/^\s*$/;
1316
961b4928
DM		 1317 my $linenr = $fh->input_line_number();
1318 my $prefix = "$filename (line $linenr)";
1319
2d404ffc 1320 if ($line =~ m/^\[(\S+)\]\s*$/i) {
51bae274 1321 $section = lc($1);
2d404ffc 1322 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
5e1267a5
DM		 1323 next;
1324 }
51bae274 1325 if (!$section) {
961b4928 1326 warn "$prefix: skip line - no section";
5e1267a5
DM		 1327 next;
1328 }
1329
2d404ffc
DM		 1330 next if !$res->{$section}; # skip undefined section
1331
1332 if ($section eq 'options') {
1333 eval {
2d404ffc
DM		 1334 my ($opt, $value) = parse_hostfw_option($line);
1335 $res->{options}->{$opt} = $value;
1336 };
1337 warn "$prefix: $@" if $@;
1338 next;
1339 }
1340
961b4928
DM		 1341 my $rules;
1342 eval { $rules = parse_fw_rule($line, 1, 1); };
ecbea048 1343 if (my $err = $@) {
961b4928 1344 warn "$prefix: $err";
ecbea048 1345 next;
ecbea048
DM		 1346 }
1347
961b4928 1348 push @{$res->{$section}}, @$rules;
51bae274 1349 }
ecbea048 1350
51bae274
DM		 1351 return $res;
1352}
4cdbb3b7 1353
51bae274
DM		 1354sub parse_group_fw_rules {
1355 my ($filename, $fh) = @_;
5e1267a5 1356
51bae274
DM		 1357 my $section;
1358 my $group;
1359
92e976b3 1360 my $res = { rules => [] };
6158271d 1361
51bae274
DM		 1362 while (defined(my $line = <$fh>)) {
1363 next if $line =~ m/^#/;
1364 next if $line =~ m/^\s*$/;
1365
961b4928
DM		 1366 my $linenr = $fh->input_line_number();
1367 my $prefix = "$filename (line $linenr)";
1368
92e976b3
DM		 1369 if ($line =~ m/^\[group\s+(\S+)\]\s*$/i) {
1370 $section = 'rules';
1371 $group = lc($1);
51bae274
DM		 1372 next;
1373 }
1374 if (!$section || !$group) {
961b4928 1375 warn "$prefix: skip line - no section";
51bae274
DM		 1376 next;
1377 }
1378
961b4928
DM		 1379 my $rules;
1380 eval { $rules = parse_fw_rule($line, 0, 0); };
51bae274 1381 if (my $err = $@) {
961b4928 1382 warn "$prefix: $err";
51bae274
DM		 1383 next;
1384 }
1385
961b4928 1386 push @{$res->{$group}->{$section}}, @$rules;
5e1267a5
DM		 1387 }
1388
1389 return $res;
1390}
1391
06320eb0
DM		 1392sub run_locked {
1393 my ($code, @param) = @_;
1394
1395 my $timeout = 10;
1396
1397 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
1398
1399 die $@ if $@;
1400
1401 return $res;
1402}
1403
5e1267a5
DM		 1404sub read_local_vm_config {
1405
1406 my $openvz = {};
5e1267a5
DM		 1407 my $qemu = {};
1408
c8301d63 1409 my $vmdata = { openvz => $openvz, qemu => $qemu };
5e1267a5 1410
c8301d63
DM		 1411 my $vmlist = PVE::Cluster::get_vmlist();
1412 return $vmdata if !$vmlist || !$vmlist->{ids};
1413 my $ids = $vmlist->{ids};
1414
1415 foreach my $vmid (keys %$ids) {
1416 next if !$vmid; # skip VE0
1417 my $d = $ids->{$vmid};
1418 next if !$d->{node} || $d->{node} ne $nodename;
1419 next if !$d->{type};
1420 if ($d->{type} eq 'openvz') {
1421 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
1422 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1423 $openvz->{$vmid} = $conf;
1424 }
1425 } elsif ($d->{type} eq 'qemu') {
1426 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
1427 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1428 $qemu->{$vmid} = $conf;
1429 }
5e1267a5
DM		 1430 }
1431 }
c8301d63 1432
5e1267a5
DM		 1433 return $vmdata;
1434};
1435
6fc63ffd 1436sub read_vm_firewall_configs {
5e1267a5 1437 my ($vmdata) = @_;
6fc63ffd 1438 my $vmfw_configs = {};
c8301d63 1439
5e1267a5
DM		 1440 foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
1441 my $filename = "/etc/pve/firewall/$vmid.fw";
1442 my $fh = IO::File->new($filename, O_RDONLY);
1443 next if !$fh;
1444
6fc63ffd 1445 $vmfw_configs->{$vmid} = parse_vm_fw_rules($filename, $fh);
5e1267a5
DM		 1446 }
1447
6fc63ffd 1448 return $vmfw_configs;
5e1267a5
DM		 1449}
1450
2d404ffc
DM		 1451sub get_option_log_level {
1452 my ($options, $k) = @_;
1453
1454 my $v = $options->{$k};
178a63be 1455 $v = $default_log_level if !defined($v);
2d404ffc
DM		 1456
1457 return undef if $v eq '' || $v eq 'nolog';
1458
1459 $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
1460
1461 return $v if ($v >= 0) && ($v <= 7);
1462
1463 warn "unknown log level ($k = '$v')\n";
1464
1465 return undef;
1466}
1467
d8f2505e 1468sub generate_std_chains {
2d404ffc
DM		 1469 my ($ruleset, $options) = @_;
1470
1471 my $loglevel = get_option_log_level($options, 'smurf_log_level');
1472
1473 # same as shorewall smurflog.
1474 if (defined($loglevel)) {
1475 $pve_std_chains-> {'PVEFW-smurflog'} = [
2f3d8d76 1476 "-j LOG --log-prefix \"smurfs-dropped: \" --log-level $loglevel",
2d404ffc
DM		 1477 "-j DROP",
1478 ];
1479 } else {
1480 $pve_std_chains-> {'PVEFW-smurflog'} = [ "-j DROP" ];
1481 }
1482
1483 # same as shorewall logflags action.
1484 $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
1485 if (defined($loglevel)) {
1486 $pve_std_chains-> {'PVEFW-logflags'} = [
2f3d8d76 1487 "-j LOG --log-prefix \"logflags-dropped: \" --log-level $loglevel --log-ip-options",
2d404ffc
DM		 1488 "-j DROP",
1489 ];
1490 } else {
1491 $pve_std_chains-> {'PVEFW-logflags'} = [ "-j DROP" ];
1492 }
d8f2505e
DM		 1493
1494 foreach my $chain (keys %$pve_std_chains) {
1495 ruleset_create_chain($ruleset, $chain);
1496 foreach my $rule (@{$pve_std_chains->{$chain}}) {
1497 if (ref($rule)) {
1498 ruleset_generate_rule($ruleset, $chain, $rule);
1499 } else {
1500 ruleset_addrule($ruleset, $chain, $rule);
1501 }
1502 }
1503 }
1504}
1505
6b9f68a2
DM		 1506sub save_pvefw_status {
1507 my ($status) = @_;
1508
1509 die "unknown status '$status' - internal error"
1510 if $status !~ m/^(stopped|active)$/;
1511
1512 mkdir dirname($pve_fw_status_filename);
1513 PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
1514}
1515
1516sub read_pvefw_status {
1517
1518 my $status = 'unknown';
1519
1520 return 'stopped' if ! -f $pve_fw_status_filename;
1521
1522 eval {
1523 $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
1524 };
1525 warn $@ if $@;
1526
1527 return $status;
1528}
1529
5e1267a5 1530sub compile {
5e1267a5 1531 my $vmdata = read_local_vm_config();
6fc63ffd 1532 my $vmfw_configs = read_vm_firewall_configs($vmdata);
6158271d 1533
92e976b3 1534 my $groups_conf = {};
51bae274
DM		 1535 my $filename = "/etc/pve/firewall/groups.fw";
1536 if (my $fh = IO::File->new($filename, O_RDONLY)) {
92e976b3 1537 $groups_conf = parse_group_fw_rules($filename, $fh);
51bae274 1538 }
5e1267a5 1539
3fa83edf
DM		 1540 my $ruleset = {};
1541
dec84fcd
DM		 1542 ruleset_create_chain($ruleset, "PVEFW-INPUT");
1543 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
5b1df9a0 1544
fadb13dd 1545 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
5b1df9a0 1546 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
3fa83edf 1547
92e976b3 1548 my $hostfw_options = {};
6d2ab017 1549 my $hostfw_conf = {};
4e6112f9 1550
51bae274
DM		 1551 $filename = "/etc/pve/local/host.fw";
1552 if (my $fh = IO::File->new($filename, O_RDONLY)) {
92e976b3
DM		 1553 $hostfw_conf = parse_host_fw_rules($filename, $fh);
1554 $hostfw_options = $hostfw_conf->{options};
2d404ffc 1555 }
fadb13dd 1556
92e976b3 1557 generate_std_chains($ruleset, $hostfw_options);
fadb13dd 1558
6d2ab017 1559 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2d404ffc 1560
d18c1e2b 1561 enable_host_firewall($ruleset, $hostfw_conf, $groups_conf) if $hostfw_enable;
3fa83edf 1562
6158271d 1563 # generate firewall rules for QEMU VMs
3fa83edf
DM		 1564 foreach my $vmid (keys %{$vmdata->{qemu}}) {
1565 my $conf = $vmdata->{qemu}->{$vmid};
6fc63ffd 1566 my $vmfw_conf = $vmfw_configs->{$vmid};
fa9c4a6f
DM		 1567 next if !$vmfw_conf;
1568 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
3fa83edf
DM		 1569
1570 foreach my $netid (keys %$conf) {
1571 next if $netid !~ m/^net(\d+)$/;
1572 my $net = PVE::QemuServer::parse_net($conf->{$netid});
1573 next if !$net;
1574 my $iface = "tap${vmid}i$1";
5e1267a5 1575
3fa83edf
DM		 1576 my $bridge = $net->{bridge};
1577 next if !$bridge; # fixme: ?
1578
1579 $bridge .= "v$net->{tag}" if $net->{tag};
1580
2f3d8d76 1581 generate_bridge_chains($ruleset, $hostfw_conf, $bridge);
3fa83edf 1582
c29f55c9 1583 my $macaddr = $net->{macaddr};
92e976b3
DM		 1584 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'IN');
1585 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'OUT');
3fa83edf
DM		 1586 }
1587 }
c8301d63
DM		 1588
1589 # generate firewall rules for OpenVZ containers
1590 foreach my $vmid (keys %{$vmdata->{openvz}}) {
1591 my $conf = $vmdata->{openvz}->{$vmid};
1592
1593 my $vmfw_conf = $vmfw_configs->{$vmid};
1594 next if !$vmfw_conf;
1595 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
1596
1597 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
1598 my $ip = $conf->{ip_address}->{value};
1599 die "implement me";
1600 }
1601
1602 if ($conf->{netif} && $conf->{netif}->{value}) {
1603 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
1604 print Dumper($netif);
1605 foreach my $netid (keys %$netif) {
1606 my $d = $netif->{$netid};
1607 my $bridge = $d->{bridge};
1608 if (!$bridge) {
1609 warn "no bridge device for CT $vmid iface '$netid'\n";
1610 next; # fixme?
1611 }
1612 my $macaddr = $d->{host_mac};
1613 my $iface = $d->{host_ifname};
1614 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'IN');
1615 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'OUT');
1616 }
1617 }
1618 }
c0413e35 1619
490cdead 1620 return wantarray ? ($ruleset, $hostfw_conf) : $ruleset;
3fa83edf
DM		 1621}
1622
1623sub get_ruleset_status {
1624 my ($ruleset, $verbose) = @_;
1625
1626 my $active_chains = iptables_get_chains();
1627
1628 my $statushash = {};
1629
1630 foreach my $chain (sort keys %$ruleset) {
09d5f68e 1631 my $digest = Digest::SHA->new('sha1');
3fa83edf
DM		 1632 foreach my $cmd (@{$ruleset->{$chain}}) {
1633 $digest->add("$cmd\n");
1634 }
1635 my $sig = $digest->b64digest;
1636 $statushash->{$chain}->{sig} = $sig;
1637
1638 my $oldsig = $active_chains->{$chain};
1639 if (!defined($oldsig)) {
1640 $statushash->{$chain}->{action} = 'create';
1641 } else {
1642 if ($oldsig eq $sig) {
1643 $statushash->{$chain}->{action} = 'exists';
1644 } else {
1645 $statushash->{$chain}->{action} = 'update';
1646 }
1647 }
1648 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
1649 foreach my $cmd (@{$ruleset->{$chain}}) {
1650 print "\t$cmd\n" if $verbose;
1651 }
1652 }
1653
1654 foreach my $chain (sort keys %$active_chains) {
1655 if (!defined($ruleset->{$chain})) {
1656 my $sig = $active_chains->{$chain};
1657 $statushash->{$chain}->{action} = 'delete';
1658 $statushash->{$chain}->{sig} = $sig;
1659 print "delete $chain ($sig)\n" if $verbose;
1660 }
6158271d 1661 }
3fa83edf
DM		 1662
1663 return $statushash;
1664}
1665
1666sub print_ruleset {
1667 my ($ruleset) = @_;
1668
1669 get_ruleset_status($ruleset, 1);
1670}
1671
1672sub print_sig_rule {
1673 my ($chain, $sig) = @_;
1674
09d5f68e
DM		 1675 # We just use this to store a SHA1 checksum used to detect changes
1676 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
b6360c3f
DM		 1677}
1678
6b9f68a2 1679sub get_rulset_cmdlist {
a84f4d96 1680 my ($ruleset, $verbose) = @_;
3fa83edf 1681
3fa83edf
DM		 1682 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
1683
1684 my $statushash = get_ruleset_status($ruleset, $verbose);
1685
1686 # create missing chains first
1687 foreach my $chain (sort keys %$ruleset) {
1688 my $stat = $statushash->{$chain};
1689 die "internal error" if !$stat;
1690 next if $stat->{action} ne 'create';
886aba9c 1691
3fa83edf
DM		 1692 $cmdlist .= ":$chain - [0:0]\n";
1693 }
1694
dec84fcd 1695 my $rule = "INPUT -j PVEFW-INPUT";
3fa83edf
DM		 1696 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1697 $cmdlist .= "-A $rule\n";
1698 }
dec84fcd 1699 $rule = "OUTPUT -j PVEFW-OUTPUT";
3fa83edf
DM		 1700 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1701 $cmdlist .= "-A $rule\n";
1702 }
1703
dec84fcd 1704 $rule = "FORWARD -j PVEFW-FORWARD";
3fa83edf
DM		 1705 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1706 $cmdlist .= "-A $rule\n";
1707 }
1708
1709 foreach my $chain (sort keys %$ruleset) {
1710 my $stat = $statushash->{$chain};
1711 die "internal error" if !$stat;
1712
1713 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
1714 $cmdlist .= "-F $chain\n";
1715 foreach my $cmd (@{$ruleset->{$chain}}) {
1716 $cmdlist .= "$cmd\n";
1717 }
1718 $cmdlist .= print_sig_rule($chain, $stat->{sig});
1719 } elsif ($stat->{action} eq 'delete') {
f5d28682 1720 die "internal error"; # this should not happen
3fa83edf
DM		 1721 } elsif ($stat->{action} eq 'exists') {
1722 # do nothing
1723 } else {
1724 die "internal error - unknown status '$stat->{action}'";
1725 }
1726 }
1727
f5d28682
DM		 1728 foreach my $chain (keys %$statushash) {
1729 next if $statushash->{$chain}->{action} ne 'delete';
1730 $cmdlist .= "-F $chain\n";
1731 }
1732 foreach my $chain (keys %$statushash) {
1733 next if $statushash->{$chain}->{action} ne 'delete';
fadb13dd
DM		 1734 next if $chain eq 'PVEFW-INPUT';
1735 next if $chain eq 'PVEFW-OUTPUT';
1736 next if $chain eq 'PVEFW-FORWARD';
f5d28682
DM		 1737 $cmdlist .= "-X $chain\n";
1738 }
1739
3fa83edf
DM		 1740 $cmdlist .= "COMMIT\n";
1741
6b9f68a2
DM		 1742 return $cmdlist;
1743}
1744
1745sub apply_ruleset {
1746 my ($ruleset, $verbose) = @_;
1747
1748 enable_bridge_firewall();
1749
1750 my $cmdlist = get_rulset_cmdlist($ruleset, $verbose);
1751
3fa83edf
DM		 1752 print $cmdlist if $verbose;
1753
1754 iptables_restore_cmdlist($cmdlist);
1755
6158271d 1756 # test: re-read status and check if everything is up to date
6b9f68a2 1757 my $statushash = get_ruleset_status($ruleset);
3fa83edf
DM		 1758
1759 my $errors;
1760 foreach my $chain (sort keys %$ruleset) {
1761 my $stat = $statushash->{$chain};
1762 if ($stat->{action} ne 'exists') {
1763 warn "unable to update chain '$chain'\n";
1764 $errors = 1;
1765 }
1766 }
b6360c3f 1767
3fa83edf 1768 die "unable to apply firewall changes\n" if $errors;
b6360c3f
DM		 1769}
1770
490cdead
DM		 1771sub update_nf_conntrack_max {
1772 my ($hostfw_conf) = @_;
1773
1774 my $max = 65536; # reasonable default
1775
1776 my $options = $hostfw_conf->{options} || {};
1777
1778 if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
1779 $max = $options->{nf_conntrack_max};
1780 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
1781 }
1782
1783 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
1784 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
1785
1786 my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
1787
1788 if ($current != $max) {
1789 my $hashsize = int($max/4);
1790 PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
1791 PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
1792 }
1793}
1794
6b9f68a2
DM		 1795sub update {
1796 my ($start, $verbose) = @_;
1797
1798 my $code = sub {
1799 my $status = read_pvefw_status();
1800
490cdead
DM		 1801 my ($ruleset, $hostfw_conf) = PVE::Firewall::compile();
1802
1803 update_nf_conntrack_max($hostfw_conf);
6b9f68a2
DM		 1804
1805 if ($start || $status eq 'active') {
1806
1807 save_pvefw_status('active') if ($status ne 'active');
1808
1809 PVE::Firewall::apply_ruleset($ruleset, $verbose);
1810 } else {
1811 print "Firewall not active (status = $status)\n" if $verbose;
1812 }
1813 };
1814
1815 run_locked($code);
1816}
1817
1818
b6360c3f 18191;
Firewall test scripts