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use correct mac for veth containers
[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
46b40c26
DM		 21# fixme: use ULOG instead of LOG?
22
c8301d63
DM		 23my $nodename = PVE::INotify::nodename();
24
06320eb0 25my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
6b9f68a2 26my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
06320eb0 27
2d404ffc
DM		 28my $default_log_level = 'info';
29
30my $log_level_hash = {
31 debug => 7,
32 info => 6,
33 notice => 5,
34 warning => 4,
35 err => 3,
36 crit => 2,
37 alert => 1,
38 emerg => 0,
39};
40
857f62c8 41# imported/converted from: /usr/share/shorewall/macro.*
961b4928 42my $pve_fw_macros = {
857f62c8
DM		 43 'Amanda' => [
44 { action => 'PARAM', proto => 'udp', dport => '10080' },
45 { action => 'PARAM', proto => 'tcp', dport => '10080' },
46 ],
47 'Auth' => [
48 { action => 'PARAM', proto => 'tcp', dport => '113' },
49 ],
50 'BGP' => [
51 { action => 'PARAM', proto => 'tcp', dport => '179' },
52 ],
53 'BitTorrent' => [
961b4928 54 { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
857f62c8
DM		 55 { action => 'PARAM', proto => 'udp', dport => '6881' },
56 ],
57 'BitTorrent32' => [
58 { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
59 { action => 'PARAM', proto => 'udp', dport => '6881' },
60 ],
61 'CVS' => [
62 { action => 'PARAM', proto => 'tcp', dport => '2401' },
63 ],
64 'Citrix' => [
65 { action => 'PARAM', proto => 'tcp', dport => '1494' },
66 { action => 'PARAM', proto => 'udp', dport => '1604' },
67 { action => 'PARAM', proto => 'tcp', dport => '2598' },
68 ],
69 'DAAP' => [
70 { action => 'PARAM', proto => 'tcp', dport => '3689' },
71 { action => 'PARAM', proto => 'udp', dport => '3689' },
72 ],
73 'DCC' => [
74 { action => 'PARAM', proto => 'tcp', dport => '6277' },
75 ],
76 'DHCPfwd' => [
77 { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
78 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' },
79 ],
80 'DNS' => [
81 { action => 'PARAM', proto => 'udp', dport => '53' },
82 { action => 'PARAM', proto => 'tcp', dport => '53' },
83 ],
84 'Distcc' => [
85 { action => 'PARAM', proto => 'tcp', dport => '3632' },
86 ],
87 'Edonkey' => [
88 { action => 'PARAM', proto => 'tcp', dport => '4662' },
89 { action => 'PARAM', proto => 'udp', dport => '4665' },
961b4928 90 ],
857f62c8
DM		 91 'FTP' => [
92 { action => 'PARAM', proto => 'tcp', dport => '21' },
93 ],
94 'Finger' => [
95 { action => 'PARAM', proto => 'tcp', dport => '79' },
96 ],
97 'GNUnet' => [
98 { action => 'PARAM', proto => 'tcp', dport => '2086' },
99 { action => 'PARAM', proto => 'udp', dport => '2086' },
100 { action => 'PARAM', proto => 'tcp', dport => '1080' },
101 { action => 'PARAM', proto => 'udp', dport => '1080' },
102 ],
103 'GRE' => [
104 { action => 'PARAM', proto => '47' },
105 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
106 ],
107 'Git' => [
108 { action => 'PARAM', proto => 'tcp', dport => '9418' },
109 ],
110 'Gnutella' => [
111 { action => 'PARAM', proto => 'tcp', dport => '6346' },
112 { action => 'PARAM', proto => 'udp', dport => '6346' },
113 ],
114 'HKP' => [
115 { action => 'PARAM', proto => 'tcp', dport => '11371' },
116 ],
117 'HTTP' => [
961b4928
DM		 118 { action => 'PARAM', proto => 'tcp', dport => '80' },
119 ],
857f62c8
DM		 120 'HTTPS' => [
121 { action => 'PARAM', proto => 'tcp', dport => '443' },
122 ],
123 'ICPV2' => [
124 { action => 'PARAM', proto => 'udp', dport => '3130' },
125 ],
126 'ICQ' => [
127 { action => 'PARAM', proto => 'tcp', dport => '5190' },
128 ],
129 'IMAP' => [
130 { action => 'PARAM', proto => 'tcp', dport => '143' },
131 ],
132 'IMAPS' => [
133 { action => 'PARAM', proto => 'tcp', dport => '993' },
134 ],
135 'IPIP' => [
136 { action => 'PARAM', proto => '94' },
137 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' },
138 ],
139 'IPP' => [
140 { action => 'PARAM', proto => 'tcp', dport => '631' },
141 ],
142 'IPPbrd' => [
143 { action => 'PARAM', proto => 'udp', dport => '631' },
144 ],
145 'IPPserver' => [
146 { action => 'PARAM', source => 'SOURCE', dest => 'DEST', proto => 'tcp', dport => '631' },
147 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '631' },
148 ],
149 'IPsec' => [
150 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
151 { action => 'PARAM', proto => '50' },
152 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
153 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
154 ],
155 'IPsecah' => [
156 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
157 { action => 'PARAM', proto => '51' },
158 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
159 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' },
160 ],
161 'IPsecnat' => [
162 { action => 'PARAM', proto => 'udp', dport => '500' },
163 { action => 'PARAM', proto => 'udp', dport => '4500' },
164 { action => 'PARAM', proto => '50' },
165 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' },
166 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' },
167 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
168 ],
169 'IRC' => [
170 { action => 'PARAM', proto => 'tcp', dport => '6667' },
171 ],
172 'JabberPlain' => [
173 { action => 'PARAM', proto => 'tcp', dport => '5222' },
174 ],
175 'JabberSecure' => [
176 { action => 'PARAM', proto => 'tcp', dport => '5223' },
177 ],
178 'Jabberd' => [
179 { action => 'PARAM', proto => 'tcp', dport => '5269' },
180 ],
181 'Jetdirect' => [
182 { action => 'PARAM', proto => 'tcp', dport => '9100' },
183 ],
184 'L2TP' => [
185 { action => 'PARAM', proto => 'udp', dport => '1701' },
186 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' },
187 ],
188 'LDAP' => [
189 { action => 'PARAM', proto => 'tcp', dport => '389' },
190 ],
191 'LDAPS' => [
192 { action => 'PARAM', proto => 'tcp', dport => '636' },
193 ],
194 'MSNP' => [
195 { action => 'PARAM', proto => 'tcp', dport => '1863' },
196 ],
197 'MSSQL' => [
198 { action => 'PARAM', proto => 'tcp', dport => '1433' },
199 ],
200 'Mail' => [
201 { action => 'PARAM', proto => 'tcp', dport => '25' },
202 { action => 'PARAM', proto => 'tcp', dport => '465' },
203 { action => 'PARAM', proto => 'tcp', dport => '587' },
204 ],
205 'Munin' => [
206 { action => 'PARAM', proto => 'tcp', dport => '4949' },
207 ],
208 'MySQL' => [
209 { action => 'PARAM', proto => 'tcp', dport => '3306' },
210 ],
211 'NNTP' => [
212 { action => 'PARAM', proto => 'tcp', dport => '119' },
213 ],
214 'NNTPS' => [
215 { action => 'PARAM', proto => 'tcp', dport => '563' },
216 ],
217 'NTP' => [
218 { action => 'PARAM', proto => 'udp', dport => '123' },
219 ],
220 'NTPbi' => [
221 { action => 'PARAM', proto => 'udp', dport => '123' },
222 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' },
223 ],
224 'NTPbrd' => [
225 { action => 'PARAM', proto => 'udp', dport => '123' },
226 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '123' },
227 ],
228 'OSPF' => [
229 { action => 'PARAM', proto => '89' },
230 ],
231 'OpenVPN' => [
232 { action => 'PARAM', proto => 'udp', dport => '1194' },
233 ],
234 'PCA' => [
235 { action => 'PARAM', proto => 'udp', dport => '5632' },
236 { action => 'PARAM', proto => 'tcp', dport => '5631' },
237 ],
238 'POP3' => [
239 { action => 'PARAM', proto => 'tcp', dport => '110' },
240 ],
241 'POP3S' => [
242 { action => 'PARAM', proto => 'tcp', dport => '995' },
243 ],
244 'PPtP' => [
245 { action => 'PARAM', proto => '47' },
246 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
247 { action => 'PARAM', proto => 'tcp', dport => '1723' },
248 ],
249 'Ping' => [
269d4f13 250 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
857f62c8
DM		 251 ],
252 'PostgreSQL' => [
253 { action => 'PARAM', proto => 'tcp', dport => '5432' },
254 ],
255 'Printer' => [
256 { action => 'PARAM', proto => 'tcp', dport => '515' },
257 ],
258 'RDP' => [
259 { action => 'PARAM', proto => 'tcp', dport => '3389' },
260 ],
261 'RIPbi' => [
262 { action => 'PARAM', proto => 'udp', dport => '520' },
263 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' },
264 ],
265 'RNDC' => [
266 { action => 'PARAM', proto => 'tcp', dport => '953' },
267 ],
268 'Razor' => [
269 { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
270 ],
271 'Rdate' => [
272 { action => 'PARAM', proto => 'tcp', dport => '37' },
273 ],
274 'Rsync' => [
275 { action => 'PARAM', proto => 'tcp', dport => '873' },
276 ],
277 'SANE' => [
278 { action => 'PARAM', proto => 'tcp', dport => '6566' },
279 ],
280 'SMB' => [
281 { action => 'PARAM', proto => 'udp', dport => '135,445' },
282 { action => 'PARAM', proto => 'udp', dport => '137:139' },
283 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
284 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
285 ],
286 'SMBBI' => [
287 { action => 'PARAM', proto => 'udp', dport => '135,445' },
288 { action => 'PARAM', proto => 'udp', dport => '137:139' },
289 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
290 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
291 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' },
292 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' },
293 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' },
294 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' },
295 ],
296 'SMBswat' => [
297 { action => 'PARAM', proto => 'tcp', dport => '901' },
298 ],
299 'SMTP' => [
300 { action => 'PARAM', proto => 'tcp', dport => '25' },
301 ],
302 'SMTPS' => [
303 { action => 'PARAM', proto => 'tcp', dport => '465' },
304 ],
305 'SNMP' => [
306 { action => 'PARAM', proto => 'udp', dport => '161:162' },
307 { action => 'PARAM', proto => 'tcp', dport => '161' },
308 ],
309 'SPAMD' => [
310 { action => 'PARAM', proto => 'tcp', dport => '783' },
311 ],
312 'SSH' => [
313 { action => 'PARAM', proto => 'tcp', dport => '22' },
314 ],
315 'SVN' => [
316 { action => 'PARAM', proto => 'tcp', dport => '3690' },
317 ],
318 'SixXS' => [
319 { action => 'PARAM', proto => 'tcp', dport => '3874' },
320 { action => 'PARAM', proto => 'udp', dport => '3740' },
321 { action => 'PARAM', proto => '41' },
322 { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
323 ],
324 'Squid' => [
325 { action => 'PARAM', proto => 'tcp', dport => '3128' },
326 ],
327 'Submission' => [
328 { action => 'PARAM', proto => 'tcp', dport => '587' },
329 ],
330 'Syslog' => [
331 { action => 'PARAM', proto => 'udp', dport => '514' },
332 { action => 'PARAM', proto => 'tcp', dport => '514' },
333 ],
334 'TFTP' => [
335 { action => 'PARAM', proto => 'udp', dport => '69' },
336 ],
337 'Telnet' => [
338 { action => 'PARAM', proto => 'tcp', dport => '23' },
339 ],
340 'Telnets' => [
341 { action => 'PARAM', proto => 'tcp', dport => '992' },
342 ],
343 'Time' => [
344 { action => 'PARAM', proto => 'tcp', dport => '37' },
345 ],
346 'Trcrt' => [
347 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
269d4f13 348 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
857f62c8
DM		 349 ],
350 'VNC' => [
351 { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
352 ],
353 'VNCL' => [
354 { action => 'PARAM', proto => 'tcp', dport => '5500' },
355 ],
356 'Web' => [
357 { action => 'PARAM', proto => 'tcp', dport => '80' },
961b4928
DM		 358 { action => 'PARAM', proto => 'tcp', dport => '443' },
359 ],
857f62c8
DM		 360 'Webcache' => [
361 { action => 'PARAM', proto => 'tcp', dport => '8080' },
362 ],
363 'Webmin' => [
364 { action => 'PARAM', proto => 'tcp', dport => '10000' },
365 ],
366 'Whois' => [
367 { action => 'PARAM', proto => 'tcp', dport => '43' },
368 ],
961b4928
DM		 369};
370
371my $pve_fw_parsed_macros;
372my $pve_fw_preferred_macro_names = {};
3a616aa0 373
d8f2505e
DM		 374my $pve_std_chains = {
375 'PVEFW-SET-ACCEPT-MARK' => [
376 "-j MARK --set-mark 1",
377 ],
79929d9c
DM		 378 'PVEFW-DropBroadcast' => [
379 # same as shorewall 'Broadcast'
380 # simply DROP BROADCAST/MULTICAST/ANYCAST
381 # we can use this to reduce logging
382 { action => 'DROP', dsttype => 'BROADCAST' },
383 { action => 'DROP', dsttype => 'MULTICAST' },
384 { action => 'DROP', dsttype => 'ANYCAST' },
385 { action => 'DROP', dest => '224.0.0.0/4' },
386 ],
387 'PVEFW-reject' => [
388 # same as shorewall 'reject'
389 { action => 'DROP', dsttype => 'BROADCAST' },
390 { action => 'DROP', source => '224.0.0.0/4' },
391 { action => 'DROP', proto => 'icmp' },
392 "-p tcp -j REJECT --reject-with tcp-reset",
393 "-p udp -j REJECT --reject-with icmp-port-unreachable",
394 "-p icmp -j REJECT --reject-with icmp-host-unreachable",
395 "-j REJECT --reject-with icmp-host-prohibited",
396 ],
397 'PVEFW-Drop' => [
398 # same as shorewall 'Drop', which is equal to DROP,
399 # but REJECT/DROP some packages to reduce logging,
400 # and ACCEPT critical ICMP types
401 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
402 # we are not interested in BROADCAST/MULTICAST/ANYCAST
403 { action => 'PVEFW-DropBroadcast' },
404 # ACCEPT critical ICMP types
405 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
406 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
407 # Drop packets with INVALID state
408 "-m conntrack --ctstate INVALID -j DROP",
409 # Drop Microsoft SMB noise
410 { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
411 { action => 'DROP', proto => 'udp', dport => '137:139'},
412 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
413 { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
414 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
415 # Drop new/NotSyn traffic so that it doesn't get logged
416 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
417 # Drop DNS replies
418 { action => 'DROP', proto => 'udp', sport => 53 },
419 ],
420 'PVEFW-Reject' => [
421 # same as shorewall 'Reject', which is equal to Reject,
422 # but REJECT/DROP some packages to reduce logging,
423 # and ACCEPT critical ICMP types
424 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
425 # we are not interested in BROADCAST/MULTICAST/ANYCAST
426 { action => 'PVEFW-DropBroadcast' },
427 # ACCEPT critical ICMP types
428 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
429 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
430 # Drop packets with INVALID state
431 "-m conntrack --ctstate INVALID -j DROP",
432 # Drop Microsoft SMB noise
433 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
434 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
435 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
436 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
437 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
438 # Drop new/NotSyn traffic so that it doesn't get logged
439 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
440 # Drop DNS replies
441 { action => 'DROP', proto => 'udp', sport => 53 },
442 ],
d86659ef
DM		 443 'PVEFW-tcpflags' => [
444 # same as shorewall tcpflags action.
445 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
446 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
447 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
448 "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
449 "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
450 "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
451 ],
bee633ab
DM		 452 'PVEFW-smurfs' => [
453 # same as shorewall smurfs action
454 # Filter packets for smurfs (packets with a broadcast address as the source).
455 "-s 0.0.0.0/32 -j RETURN",
456 "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
457 "-s 224.0.0.0/4 -g PVEFW-smurflog",
458 ],
d8f2505e
DM		 459};
460
4b586518
DM		 461# iptables -p icmp -h
462my $icmp_type_names = {
463 any => 1,
464 'echo-reply' => 1,
465 'destination-unreachable' => 1,
466 'network-unreachable' => 1,
467 'host-unreachable' => 1,
468 'protocol-unreachable' => 1,
469 'port-unreachable' => 1,
470 'fragmentation-needed' => 1,
471 'source-route-failed' => 1,
472 'network-unknown' => 1,
473 'host-unknown' => 1,
474 'network-prohibited' => 1,
475 'host-prohibited' => 1,
476 'TOS-network-unreachable' => 1,
477 'TOS-host-unreachable' => 1,
478 'communication-prohibited' => 1,
479 'host-precedence-violation' => 1,
480 'precedence-cutoff' => 1,
481 'source-quench' => 1,
482 'redirect' => 1,
483 'network-redirect' => 1,
484 'host-redirect' => 1,
485 'TOS-network-redirect' => 1,
486 'TOS-host-redirect' => 1,
487 'echo-request' => 1,
488 'router-advertisement' => 1,
489 'router-solicitation' => 1,
490 'time-exceeded' => 1,
491 'ttl-zero-during-transit' => 1,
492 'ttl-zero-during-reassembly' => 1,
493 'parameter-problem' => 1,
494 'ip-header-bad' => 1,
495 'required-option-missing' => 1,
496 'timestamp-request' => 1,
497 'timestamp-reply' => 1,
498 'address-mask-request' => 1,
499 'address-mask-reply' => 1,
500};
501
a332200b 502sub get_firewall_macros {
9aab3127 503
961b4928 504 return $pve_fw_parsed_macros if $pve_fw_parsed_macros;
6158271d 505
961b4928 506 $pve_fw_parsed_macros = {};
9aab3127 507
961b4928
DM		 508 foreach my $k (keys %$pve_fw_macros) {
509 my $name = lc($k);
a332200b 510
961b4928
DM		 511 my $macro = $pve_fw_macros->{$k};
512 $pve_fw_preferred_macro_names->{$name} = $k;
513 $pve_fw_parsed_macros->{$name} = $macro;
514 }
a332200b 515
961b4928 516 return $pve_fw_parsed_macros;
9aab3127
DM		 517}
518
fcba0beb
DM		 519my $etc_services;
520
521sub get_etc_services {
522
523 return $etc_services if $etc_services;
524
525 my $filename = "/etc/services";
526
527 my $fh = IO::File->new($filename, O_RDONLY);
528 if (!$fh) {
529 warn "unable to read '$filename' - $!\n";
530 return {};
531 }
532
533 my $services = {};
534
535 while (my $line = <$fh>) {
536 chomp ($line);
537 next if $line =~m/^#/;
538 next if ($line =~m/^\s*$/);
539
540 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
541 $services->{byid}->{$2}->{name} = $1;
35b66e9d 542 $services->{byid}->{$2}->{port} = $2;
fcba0beb
DM		 543 $services->{byid}->{$2}->{$3} = 1;
544 $services->{byname}->{$1} = $services->{byid}->{$2};
545 }
546 }
547
548 close($fh);
549
6158271d
DM		 550 $etc_services = $services;
551
3a616aa0 552
fcba0beb
DM		 553 return $etc_services;
554}
555
556my $etc_protocols;
557
558sub get_etc_protocols {
559 return $etc_protocols if $etc_protocols;
560
561 my $filename = "/etc/protocols";
562
563 my $fh = IO::File->new($filename, O_RDONLY);
564 if (!$fh) {
565 warn "unable to read '$filename' - $!\n";
566 return {};
567 }
568
569 my $protocols = {};
570
571 while (my $line = <$fh>) {
572 chomp ($line);
573 next if $line =~m/^#/;
574 next if ($line =~m/^\s*$/);
575
576 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
577 $protocols->{byid}->{$2}->{name} = $1;
578 $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
579 }
580 }
581
582 close($fh);
583
584 $etc_protocols = $protocols;
585
586 return $etc_protocols;
587}
588
ecbea048
DM		 589sub parse_address_list {
590 my ($str) = @_;
591
d6de1dc2 592 my $nbaor = 0;
ecbea048
DM		 593 foreach my $aor (split(/,/, $str)) {
594 if (!Net::IP->new($aor)) {
595 my $err = Net::IP::Error();
596 die "invalid IP address: $err\n";
d6de1dc2
AD		 597 }else{
598 $nbaor++;
ecbea048
DM		 599 }
600 }
d6de1dc2 601 return $nbaor;
ecbea048 602}
dddd9413 603
fcba0beb
DM		 604sub parse_port_name_number_or_range {
605 my ($str) = @_;
606
607 my $services = PVE::Firewall::get_etc_services();
4cdbb3b7 608 my $nbports = 0;
fcba0beb 609 foreach my $item (split(/,/, $str)) {
4cdbb3b7 610 my $portlist = "";
35b66e9d 611 my $oldpon = undef;
4b586518 612 $nbports++;
fcba0beb 613 foreach my $pon (split(':', $item, 2)) {
35b66e9d 614 $pon = $services->{byname}->{$pon}->{port} if $services->{byname}->{$pon}->{port};
4cdbb3b7 615 if ($pon =~ m/^\d+$/){
857f62c8 616 die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535;
35b66e9d
AD		 617 die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon);
618 $oldpon = $pon;
4cdbb3b7
AD		 619 }else{
620 die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon};
621 }
fcba0beb
DM		 622 }
623 }
624
4cdbb3b7 625 return ($nbports);
fcba0beb
DM		 626}
627
780bcc0f
DM		 628my $bridge_firewall_enabled = 0;
629
630sub enable_bridge_firewall {
631
632 return if $bridge_firewall_enabled; # only once
633
5f0a912c
DM		 634 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
635 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
780bcc0f 636
6a8a75db
DM		 637 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
638 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
639
780bcc0f
DM		 640 $bridge_firewall_enabled = 1;
641}
642
8cebfa6f 643my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
dddd9413 644
3a616aa0
AD		 645sub iptables {
646 my ($cmd) = @_;
647
648 run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {});
649}
650
b16e818e
DM		 651sub iptables_restore_cmdlist {
652 my ($cmdlist) = @_;
3a616aa0 653
3fa83edf 654 run_command("/sbin/iptables-restore -n", input => $cmdlist);
3a616aa0
AD		 655}
656
de2a57cd
DM		 657sub iptables_get_chains {
658
659 my $res = {};
660
661 # check what chains we want to track
662 my $is_pvefw_chain = sub {
663 my $name = shift;
664
dec84fcd
DM		 665 return 1 if $name =~ m/^PVEFW-\S+$/;
666
de2a57cd 667 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
954f24b1
DM		 668
669 return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
670
9e15114a
DM		 671 return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
672
5927497d 673 return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT)$/;
f50656c2 674 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
de2a57cd
DM		 675
676 return undef;
677 };
678
679 my $table = '';
680
de2a57cd
DM		 681 my $parser = sub {
682 my $line = shift;
683
684 return if $line =~ m/^#/;
685 return if $line =~ m/^\s*$/;
686
687 if ($line =~ m/^\*(\S+)$/) {
688 $table = $1;
689 return;
690 }
691
692 return if $table ne 'filter';
693
694 if ($line =~ m/^:(\S+)\s/) {
695 my $chain = $1;
696 return if !&$is_pvefw_chain($chain);
3fa83edf 697 $res->{$chain} = "unknown";
09d5f68e 698 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
3fa83edf 699 my ($chain, $sig) = ($1, $2);
de2a57cd 700 return if !&$is_pvefw_chain($chain);
3fa83edf 701 $res->{$chain} = $sig;
de2a57cd
DM		 702 } else {
703 # simply ignore the rest
704 return;
705 }
706 };
707
708 run_command("/sbin/iptables-save", outfunc => $parser);
709
de2a57cd
DM		 710 return $res;
711}
712
3a616aa0
AD		 713sub iptables_chain_exist {
714 my ($chain) = @_;
715
716 eval{
717 iptables("-n --list $chain");
718 };
719 return undef if $@;
720
721 return 1;
722}
723
724sub iptables_rule_exist {
725 my ($rule) = @_;
726
727 eval{
728 iptables("-C $rule");
729 };
730 return undef if $@;
731
732 return 1;
733}
734
eba0fb64 735sub ruleset_generate_cmdstr {
2f906466 736 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
3a616aa0 737
11bac5c2
DM		 738 return if $rule->{disable};
739
41524a58 740 my @cmd = ();
3a616aa0 741
eba0fb64
DM		 742 push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
743 push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
744
41524a58
DM		 745 push @cmd, "-m iprange --src-range" if $rule->{nbsource} && $rule->{nbsource} > 1;
746 push @cmd, "-s $rule->{source}" if $rule->{source};
747 push @cmd, "-m iprange --dst-range" if $rule->{nbdest} && $rule->{nbdest} > 1;
748 push @cmd, "-d $rule->{dest}" if $rule->{dest};
4b586518 749
181390b0 750 if ($rule->{proto}) {
41524a58 751 push @cmd, "-p $rule->{proto}";
e3a1d391 752
181390b0
DM		 753 my $multiport = 0;
754 $multiport++ if $rule->{nbdport} && ($rule->{nbdport} > 1);
755 $multiport++ if $rule->{nbsport} && ($rule->{nbsport} > 1);
e3a1d391 756
41524a58 757 push @cmd, "--match multiport" if $multiport;
4b586518 758
181390b0
DM		 759 die "multiport: option '--sports' cannot be used together with '--dports'\n"
760 if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
761
762 if ($rule->{dport}) {
763 if ($rule->{proto} && $rule->{proto} eq 'icmp') {
764 # Note: we use dport to store --icmp-type
765 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
41524a58 766 push @cmd, "-m icmp --icmp-type $rule->{dport}";
181390b0
DM		 767 } else {
768 if ($rule->{nbdport} && $rule->{nbdport} > 1) {
769 if ($multiport == 2) {
41524a58 770 push @cmd, "--ports $rule->{dport}";
181390b0 771 } else {
41524a58 772 push @cmd, "--dports $rule->{dport}";
181390b0 773 }
e3a1d391 774 } else {
41524a58 775 push @cmd, "--dport $rule->{dport}";
e3a1d391 776 }
4b586518
DM		 777 }
778 }
4b586518 779
181390b0
DM		 780 if ($rule->{sport}) {
781 if ($rule->{nbsport} && $rule->{nbsport} > 1) {
41524a58 782 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
181390b0 783 } else {
41524a58 784 push @cmd, "--sport $rule->{sport}";
181390b0 785 }
4b586518 786 }
181390b0
DM		 787 } elsif ($rule->{dport} || $rule->{sport}) {
788 warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
789 warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
4b586518
DM		 790 }
791
41524a58 792 push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
4e6112f9
DM		 793
794 if (my $action = $rule->{action}) {
2f906466 795 $action = $actions->{$action} if defined($actions->{$action});
4e6112f9 796 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
41524a58 797 push @cmd, $goto ? "-g $action" : "-j $action";
181390b0 798 }
3a616aa0 799
eba0fb64
DM		 800 return scalar(@cmd) ? join(' ', @cmd) : undef;
801}
802
803sub ruleset_generate_rule {
804 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
805
806 if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
41524a58
DM		 807 ruleset_addrule($ruleset, $chain, $cmdstr);
808 }
3fa83edf 809}
eba0fb64
DM		 810sub ruleset_generate_rule_insert {
811 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
812
813 if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
814 ruleset_insertrule($ruleset, $chain, $cmdstr);
815 }
816}
3fa83edf
DM		 817
818sub ruleset_create_chain {
819 my ($ruleset, $chain) = @_;
3a616aa0 820
d050c724
DM		 821 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
822
3fa83edf
DM		 823 die "chain '$chain' already exists\n" if $ruleset->{$chain};
824
825 $ruleset->{$chain} = [];
3a616aa0
AD		 826}
827
3fa83edf
DM		 828sub ruleset_chain_exist {
829 my ($ruleset, $chain) = @_;
3a616aa0 830
3fa83edf
DM		 831 return $ruleset->{$chain} ? 1 : undef;
832}
3a616aa0 833
3fa83edf
DM		 834sub ruleset_addrule {
835 my ($ruleset, $chain, $rule) = @_;
3a616aa0 836
3fa83edf 837 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 838
3fa83edf
DM		 839 push @{$ruleset->{$chain}}, "-A $chain $rule";
840}
3a616aa0 841
3fa83edf
DM		 842sub ruleset_insertrule {
843 my ($ruleset, $chain, $rule) = @_;
3a616aa0 844
3fa83edf 845 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 846
3fa83edf
DM		 847 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
848}
3a616aa0 849
3fa83edf 850sub generate_bridge_chains {
530c005e
DM		 851 my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_;
852
853 my $options = $hostfw_conf->{options} || {};
854
855 die "error: detected direct route to bridge '$bridge'\n"
856 if !$options->{allow_bridge_route} && $routing_table->{$bridge};
2f3d8d76 857
5927497d
DM		 858 if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
859 ruleset_create_chain($ruleset, "$bridge-FW");
860 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
861 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
3fa83edf 862 }
3a616aa0 863
3fa83edf
DM		 864 if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
865 ruleset_create_chain($ruleset, "$bridge-OUT");
5927497d 866 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-in -j $bridge-OUT");
38485daa 867 ruleset_insertrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-bridged --physdev-is-in -j $bridge-OUT");
9fcad984
AD		 868 }
869
870 if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
871 ruleset_create_chain($ruleset, "$bridge-IN");
5927497d 872 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j $bridge-IN");
fdb0bf20 873 ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
7323008d
DM		 874 # accept traffic to unmanaged bridge ports
875 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j ACCEPT ");
3fa83edf
DM		 876 }
877}
3a616aa0 878
ead850e8
DM		 879sub ruleset_add_chain_policy {
880 my ($ruleset, $chain, $policy, $loglevel, $accept_action) = @_;
881
882 if ($policy eq 'ACCEPT') {
883
884 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
885 { ACCEPT => $accept_action});
886
887 } elsif ($policy eq 'DROP') {
888
889 ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
890
891 ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"$chain-dropped: \" --log-level $loglevel")
892 if defined($loglevel);
893
894 ruleset_addrule($ruleset, $chain, "-j DROP");
895 } elsif ($policy eq 'REJECT') {
896 ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
897
898 ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"$chain-reject: \" --log-level $loglevel")
899 if defined($loglevel);
900
901 ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
902 } else {
903 # should not happen
904 die "internal error: unknown policy '$policy'";
905 }
906}
907
9e15114a
DM		 908sub ruleset_create_vm_chain {
909 my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
3a616aa0 910
9e15114a 911 ruleset_create_chain($ruleset, $chain);
3a616aa0 912
bee633ab 913 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
9e15114a 914 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
bee633ab
DM		 915 }
916
ce15d90b 917 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
9e15114a 918 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 67:68 -j ACCEPT");
ce15d90b
DM		 919 }
920
bee633ab 921 if ($options->{tcpflags}) {
9e15114a 922 ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
bee633ab
DM		 923 }
924
9e15114a
DM		 925 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
926 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
3a616aa0 927
b21aca2c
DM		 928 if ($direction eq 'OUT') {
929 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
9e15114a 930 ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
b21aca2c 931 }
9e15114a 932 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
c29f55c9 933 }
9e15114a
DM		 934}
935
936sub ruleset_generate_vm_rules {
937 my ($ruleset, $rules, $groups_conf, $chain, $netid, $direction) = @_;
938
939 my $lc_direction = lc($direction);
c29f55c9 940
92e976b3
DM		 941 foreach my $rule (@$rules) {
942 next if $rule->{iface} && $rule->{iface} ne $netid;
943 next if $rule->{disable};
944 if ($rule->{type} eq 'group') {
945 my $group_chain = "GROUP-$rule->{action}-$direction";
946 if(!ruleset_chain_exist($ruleset, $group_chain)){
947 generate_group_rules($ruleset, $groups_conf, $rule->{action});
948 }
9e15114a
DM		 949 ruleset_addrule($ruleset, $chain, "-j $group_chain");
950 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j RETURN")
92e976b3
DM		 951 if $direction eq 'OUT';
952 } else {
953 next if $rule->{type} ne $lc_direction;
954 if ($direction eq 'OUT') {
9e15114a 955 ruleset_generate_rule($ruleset, $chain, $rule,
92e976b3 956 { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
4e6112f9 957 } else {
9e15114a 958 ruleset_generate_rule($ruleset, $chain, $rule, { REJECT => "PVEFW-reject" });
3a616aa0 959 }
4e6112f9 960 }
3a616aa0 961 }
9e15114a
DM		 962}
963
964sub generate_venet_rules_direction {
965 my ($ruleset, $groups_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
966
5176619e 967 parse_address_list($ip); # make sure we have a valid $ip list
9e15114a
DM		 968
969 my $lc_direction = lc($direction);
970
971 my $rules = $vmfw_conf->{rules};
972
973 my $options = $vmfw_conf->{options};
974 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
975
976 my $chain = "venet0-$vmid-$direction";
977
978 ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
979
980 ruleset_generate_vm_rules($ruleset, $rules, $groups_conf, $chain, 'venet', $direction);
981
982 # implement policy
983 my $policy;
984
985 if ($direction eq 'OUT') {
986 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
987 } else {
988 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
989 }
990
991 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : "ACCEPT";
992 ruleset_add_chain_policy($ruleset, $chain, $policy, $loglevel, $accept_action);
993
38485daa 994 # plug into FORWARD, INPUT and OUTPUT chain
eba0fb64
DM		 995 if ($direction eq 'OUT') {
996 ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD", {
997 action => $chain,
998 source => $ip,
999 iface_in => 'venet0'});
38485daa
DM		 1000
1001 ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT", {
1002 action => $chain,
1003 source => $ip,
1004 iface_in => 'venet0'});
eba0fb64
DM		 1005 } else {
1006 ruleset_generate_rule($ruleset, "PVEFW-FORWARD", {
1007 action => $chain,
1008 dest => $ip,
1009 iface_out => 'venet0'});
38485daa
DM		 1010
1011 ruleset_generate_rule($ruleset, "PVEFW-OUTPUT", {
1012 action => $chain,
1013 dest => $ip,
1014 iface_out => 'venet0'});
eba0fb64 1015 }
9e15114a
DM		 1016}
1017
1018sub generate_tap_rules_direction {
1019 my ($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, $direction) = @_;
1020
1021 my $lc_direction = lc($direction);
1022
1023 my $rules = $vmfw_conf->{rules};
1024
1025 my $options = $vmfw_conf->{options};
1026 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1027
1028 my $tapchain = "$iface-$direction";
1029
1030 ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1031
1032 ruleset_generate_vm_rules($ruleset, $rules, $groups_conf, $tapchain, $netid, $direction);
3a616aa0 1033
ccae0b50
DM		 1034 # implement policy
1035 my $policy;
1036
1037 if ($direction eq 'OUT') {
72f63fde 1038 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
ccae0b50 1039 } else {
72f63fde 1040 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
ccae0b50
DM		 1041 }
1042
ead850e8
DM		 1043 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : "ACCEPT";
1044 ruleset_add_chain_policy($ruleset, $tapchain, $policy, $loglevel, $accept_action);
3a616aa0 1045
3fa83edf
DM		 1046 # plug the tap chain to bridge chain
1047 my $physdevdirection = $direction eq 'IN' ? "out" : "in";
1048 my $rule = "-m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain";
1049 ruleset_insertrule($ruleset, "$bridge-$direction", $rule);
3a616aa0
AD		 1050}
1051
d18c1e2b 1052sub enable_host_firewall {
92e976b3 1053 my ($ruleset, $hostfw_conf, $groups_conf) = @_;
0bd5f137 1054
51bae274 1055 # fixme: allow security groups
0bd5f137 1056
92e976b3
DM		 1057 my $options = $hostfw_conf->{options};
1058 my $rules = $hostfw_conf->{rules};
178a63be 1059
3fa83edf 1060 # host inbound firewall
dec84fcd
DM		 1061 my $chain = "PVEFW-HOST-IN";
1062 ruleset_create_chain($ruleset, $chain);
0bd5f137 1063
178a63be
DM		 1064 my $loglevel = get_option_log_level($options, "log_level_in");
1065
7fab95bc
DM		 1066 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1067 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
dec84fcd
DM		 1068 ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1069 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
97156ecc 1070 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
dec84fcd 1071 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 1072
23e888f8
DM		 1073 # we use RETURN because we need to check also tap rules
1074 my $accept_action = 'RETURN';
1075
92e976b3
DM		 1076 foreach my $rule (@$rules) {
1077 next if $rule->{type} ne 'in';
23e888f8 1078 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
0bd5f137
AD		 1079 }
1080
23e888f8 1081 # implement input policy
72f63fde 1082 my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
23e888f8 1083 ruleset_add_chain_policy($ruleset, $chain, $policy, $loglevel, $accept_action);
0bd5f137 1084
3fa83edf 1085 # host outbound firewall
aadd745e 1086 $chain = "PVEFW-HOST-OUT";
dec84fcd
DM		 1087 ruleset_create_chain($ruleset, $chain);
1088
178a63be
DM		 1089 $loglevel = get_option_log_level($options, "log_level_out");
1090
7fab95bc
DM		 1091 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1092 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
dec84fcd
DM		 1093 ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1094 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
97156ecc 1095 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
dec84fcd 1096 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 1097
23e888f8
DM		 1098 # we use RETURN because we may want to check other thigs later
1099 $accept_action = 'RETURN';
1100
92e976b3
DM		 1101 foreach my $rule (@$rules) {
1102 next if $rule->{type} ne 'out';
23e888f8 1103 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
0bd5f137
AD		 1104 }
1105
23e888f8 1106 # implement output policy
72f63fde 1107 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
23e888f8 1108 ruleset_add_chain_policy($ruleset, $chain, $policy, $loglevel, $accept_action);
6158271d 1109
dec84fcd
DM		 1110 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1111 ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
9d31b418
AD		 1112}
1113
1114sub generate_group_rules {
92e976b3 1115 my ($ruleset, $groups_conf, $group) = @_;
9d31b418 1116
92e976b3 1117 die "no such security group '$group'\n" if !$groups_conf->{$group};
9d31b418 1118
92e976b3 1119 my $rules = $groups_conf->{$group}->{rules};
6158271d 1120
3fa83edf 1121 my $chain = "GROUP-${group}-IN";
9d31b418 1122
3fa83edf 1123 ruleset_create_chain($ruleset, $chain);
9d31b418 1124
92e976b3
DM		 1125 foreach my $rule (@$rules) {
1126 next if $rule->{type} ne 'in';
1127 ruleset_generate_rule($ruleset, $chain, $rule, { REJECT => "PVEFW-reject" });
9d31b418
AD		 1128 }
1129
3fa83edf 1130 $chain = "GROUP-${group}-OUT";
9d31b418 1131
3fa83edf 1132 ruleset_create_chain($ruleset, $chain);
4e6112f9 1133 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
9d31b418 1134
92e976b3
DM		 1135 foreach my $rule (@$rules) {
1136 next if $rule->{type} ne 'out';
1137 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1138 # check also other tap rules later
1139 ruleset_generate_rule($ruleset, $chain, $rule,
1140 { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
9d31b418 1141 }
9d31b418
AD		 1142}
1143
51bae274
DM		 1144my $MAX_NETS = 32;
1145my $valid_netdev_names = {};
1146for (my $i = 0; $i < $MAX_NETS; $i++) {
1147 $valid_netdev_names->{"net$i"} = 1;
1148}
5e1267a5 1149
51bae274
DM		 1150sub parse_fw_rule {
1151 my ($line, $need_iface, $allow_groups) = @_;
5e1267a5 1152
a332200b 1153 my $macros = get_firewall_macros();
fcba0beb 1154 my $protocols = get_etc_protocols();
51bae274 1155
92e976b3 1156 my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
51bae274 1157
11bac5c2
DM		 1158 # we can add single line comments to the end of the rule
1159 my $comment = $1 if $line =~ s/#\s*(.*?)\s*$//;
1160
1161 # we can disable a rule when prefixed with '|'
1162 my $disable = 1 if $line =~ s/^\|//;
51bae274
DM		 1163
1164 my @data = split(/\s+/, $line);
92e976b3 1165 my $expected_elements = $need_iface ? 8 : 7;
51bae274
DM		 1166
1167 die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1168
1169 if ($need_iface) {
92e976b3 1170 ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
51bae274 1171 } else {
92e976b3 1172 ($type, $action, $source, $dest, $proto, $dport, $sport) = @data;
51bae274
DM		 1173 }
1174
92e976b3 1175 die "incomplete rule\n" if ! ($type && $action);
51bae274 1176
961b4928
DM		 1177 my $macro;
1178 my $macro_name;
1179
92e976b3
DM		 1180 $type = lc($type);
1181
1182 if ($type eq 'in' || $type eq 'out') {
1183 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1184 # OK
1185 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1186 ($macro_name, $action) = ($1, $2);
1187 my $lc_macro_name = lc($macro_name);
1188 my $preferred_name = $pve_fw_preferred_macro_names->{$lc_macro_name};
1189 $macro_name = $preferred_name if $preferred_name;
1190 $macro = $macros->{$lc_macro_name};
1191 die "unknown macro '$macro_name'\n" if !$macro;
1192 } else {
1193 die "unknown action '$action'\n";
1194 }
1195 } elsif ($type eq 'group') {
1196 die "wrong number of rule elements\n" if scalar(@data) != 3;
1197 die "groups disabled\n" if !$allow_groups;
1198
1199 die "invalid characters in group name\n" if $action !~ m/^[A-Za-z0-9_\-]+$/;
51bae274 1200 } else {
92e976b3 1201 die "unknown rule type '$type'\n";
51bae274
DM		 1202 }
1203
1204 if ($need_iface) {
1205 $iface = undef if $iface && $iface eq '-';
51bae274
DM		 1206 }
1207
1208 $proto = undef if $proto && $proto eq '-';
6158271d 1209 die "unknown protokol '$proto'\n" if $proto &&
51bae274
DM		 1210 !(defined($protocols->{byname}->{$proto}) ||
1211 defined($protocols->{byid}->{$proto}));
1212
1213 $source = undef if $source && $source eq '-';
1214 $dest = undef if $dest && $dest eq '-';
1215
1216 $dport = undef if $dport && $dport eq '-';
1217 $sport = undef if $sport && $sport eq '-';
1218
51bae274
DM		 1219 my $nbsource = undef;
1220 my $nbdest = undef;
1221
1222 $nbsource = parse_address_list($source) if $source;
1223 $nbdest = parse_address_list($dest) if $dest;
6158271d 1224
961b4928 1225 my $rules = [];
51bae274 1226
961b4928 1227 my $param = {
92e976b3 1228 type => $type,
11bac5c2
DM		 1229 disable => $disable,
1230 comment => $comment,
51bae274 1231 action => $action,
51bae274
DM		 1232 iface => $iface,
1233 source => $source,
1234 dest => $dest,
1235 nbsource => $nbsource,
1236 nbdest => $nbdest,
1237 proto => $proto,
1238 dport => $dport,
1239 sport => $sport,
51bae274 1240 };
961b4928
DM		 1241
1242 if ($macro) {
1243 foreach my $templ (@$macro) {
1244 my $rule = {};
faf7be7e 1245 my $param_used = {};
961b4928
DM		 1246 foreach my $k (keys %$templ) {
1247 my $v = $templ->{$k};
857f62c8
DM		 1248 if ($v eq 'PARAM') {
1249 $v = $param->{$k};
faf7be7e 1250 $param_used->{$k} = 1;
857f62c8
DM		 1251 } elsif ($v eq 'DEST') {
1252 $v = $param->{dest};
faf7be7e 1253 $param_used->{dest} = 1;
857f62c8
DM		 1254 } elsif ($v eq 'SOURCE') {
1255 $v = $param->{source};
faf7be7e 1256 $param_used->{source} = 1;
857f62c8
DM		 1257 }
1258
961b4928
DM		 1259 die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
1260 $rule->{$k} = $v;
1261 }
faf7be7e
DM		 1262 foreach my $k (keys %$param) {
1263 next if !defined($param->{$k});
1264 next if $param_used->{$k};
1265 if (defined($rule->{$k})) {
1266 die "parameter '$k' already define in macro (value = '$rule->{$k}')\n"
1267 if $rule->{$k} ne $param->{$k};
1268 } else {
1269 $rule->{$k} = $param->{$k};
1270 }
1271 }
961b4928
DM		 1272 push @$rules, $rule;
1273 }
1274 } else {
1275 push @$rules, $param;
1276 }
1277
1278 foreach my $rule (@$rules) {
6158271d 1279 $rule->{nbdport} = parse_port_name_number_or_range($rule->{dport})
961b4928 1280 if defined($rule->{dport});
6158271d 1281 $rule->{nbsport} = parse_port_name_number_or_range($rule->{sport})
961b4928
DM		 1282 if defined($rule->{sport});
1283 }
1284
1285 return $rules;
51bae274
DM		 1286}
1287
2d404ffc 1288sub parse_vmfw_option {
85c6eaed
DM		 1289 my ($line) = @_;
1290
1291 my ($opt, $value);
1292
178a63be
DM		 1293 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1294
ce15d90b 1295 if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
9c6b6efd
DM		 1296 $opt = lc($1);
1297 $value = int($2);
178a63be
DM		 1298 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1299 $opt = lc($1);
1300 $value = $2 ? lc($3) : '';
72f63fde 1301 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
85c6eaed
DM		 1302 $opt = lc($1);
1303 $value = uc($3);
9c6b6efd 1304 } else {
85c6eaed
DM		 1305 chomp $line;
1306 die "can't parse option '$line'\n"
1307 }
1308
1309 return ($opt, $value);
1310}
1311
2d404ffc
DM		 1312sub parse_hostfw_option {
1313 my ($line) = @_;
1314
1315 my ($opt, $value);
1316
1317 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1318
530c005e 1319 if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags|allow_bridge_route):\s*(0|1)\s*$/i) {
2d404ffc
DM		 1320 $opt = lc($1);
1321 $value = int($2);
178a63be 1322 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2d404ffc
DM		 1323 $opt = lc($1);
1324 $value = $2 ? lc($3) : '';
72f63fde 1325 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2d404ffc
DM		 1326 $opt = lc($1);
1327 $value = uc($3);
490cdead
DM		 1328 } elsif ($line =~ m/^(nf_conntrack_max):\s*(\d+)\s*$/i) {
1329 $opt = lc($1);
1330 $value = int($2);
2d404ffc
DM		 1331 } else {
1332 chomp $line;
1333 die "can't parse option '$line'\n"
1334 }
1335
1336 return ($opt, $value);
1337}
1338
51bae274
DM		 1339sub parse_vm_fw_rules {
1340 my ($filename, $fh) = @_;
1341
92e976b3 1342 my $res = { rules => [], options => {}};
51bae274
DM		 1343
1344 my $section;
1345
5e1267a5
DM		 1346 while (defined(my $line = <$fh>)) {
1347 next if $line =~ m/^#/;
1348 next if $line =~ m/^\s*$/;
1349
961b4928
DM		 1350 my $linenr = $fh->input_line_number();
1351 my $prefix = "$filename (line $linenr)";
1352
85c6eaed 1353 if ($line =~ m/^\[(\S+)\]\s*$/i) {
5e1267a5 1354 $section = lc($1);
85c6eaed 1355 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
5e1267a5
DM		 1356 next;
1357 }
51bae274 1358 if (!$section) {
961b4928 1359 warn "$prefix: skip line - no section";
5e1267a5
DM		 1360 next;
1361 }
1362
85c6eaed
DM		 1363 next if !$res->{$section}; # skip undefined section
1364
1365 if ($section eq 'options') {
6158271d 1366 eval {
2d404ffc 1367 my ($opt, $value) = parse_vmfw_option($line);
85c6eaed
DM		 1368 $res->{options}->{$opt} = $value;
1369 };
1370 warn "$prefix: $@" if $@;
1371 next;
1372 }
1373
961b4928
DM		 1374 my $rules;
1375 eval { $rules = parse_fw_rule($line, 1, 1); };
51bae274 1376 if (my $err = $@) {
961b4928 1377 warn "$prefix: $err";
5e1267a5
DM		 1378 next;
1379 }
1380
961b4928 1381 push @{$res->{$section}}, @$rules;
51bae274
DM		 1382 }
1383
1384 return $res;
1385}
1386
1387sub parse_host_fw_rules {
1388 my ($filename, $fh) = @_;
1389
92e976b3 1390 my $res = { rules => [], options => {}};
51bae274
DM		 1391
1392 my $section;
1393
1394 while (defined(my $line = <$fh>)) {
1395 next if $line =~ m/^#/;
1396 next if $line =~ m/^\s*$/;
1397
961b4928
DM		 1398 my $linenr = $fh->input_line_number();
1399 my $prefix = "$filename (line $linenr)";
1400
2d404ffc 1401 if ($line =~ m/^\[(\S+)\]\s*$/i) {
51bae274 1402 $section = lc($1);
2d404ffc 1403 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
5e1267a5
DM		 1404 next;
1405 }
51bae274 1406 if (!$section) {
961b4928 1407 warn "$prefix: skip line - no section";
5e1267a5
DM		 1408 next;
1409 }
1410
2d404ffc
DM		 1411 next if !$res->{$section}; # skip undefined section
1412
1413 if ($section eq 'options') {
1414 eval {
2d404ffc
DM		 1415 my ($opt, $value) = parse_hostfw_option($line);
1416 $res->{options}->{$opt} = $value;
1417 };
1418 warn "$prefix: $@" if $@;
1419 next;
1420 }
1421
961b4928
DM		 1422 my $rules;
1423 eval { $rules = parse_fw_rule($line, 1, 1); };
ecbea048 1424 if (my $err = $@) {
961b4928 1425 warn "$prefix: $err";
ecbea048 1426 next;
ecbea048
DM		 1427 }
1428
961b4928 1429 push @{$res->{$section}}, @$rules;
51bae274 1430 }
ecbea048 1431
51bae274
DM		 1432 return $res;
1433}
4cdbb3b7 1434
51bae274
DM		 1435sub parse_group_fw_rules {
1436 my ($filename, $fh) = @_;
5e1267a5 1437
51bae274
DM		 1438 my $section;
1439 my $group;
1440
92e976b3 1441 my $res = { rules => [] };
6158271d 1442
51bae274
DM		 1443 while (defined(my $line = <$fh>)) {
1444 next if $line =~ m/^#/;
1445 next if $line =~ m/^\s*$/;
1446
961b4928
DM		 1447 my $linenr = $fh->input_line_number();
1448 my $prefix = "$filename (line $linenr)";
1449
92e976b3
DM		 1450 if ($line =~ m/^\[group\s+(\S+)\]\s*$/i) {
1451 $section = 'rules';
1452 $group = lc($1);
51bae274
DM		 1453 next;
1454 }
1455 if (!$section || !$group) {
961b4928 1456 warn "$prefix: skip line - no section";
51bae274
DM		 1457 next;
1458 }
1459
961b4928
DM		 1460 my $rules;
1461 eval { $rules = parse_fw_rule($line, 0, 0); };
51bae274 1462 if (my $err = $@) {
961b4928 1463 warn "$prefix: $err";
51bae274
DM		 1464 next;
1465 }
1466
961b4928 1467 push @{$res->{$group}->{$section}}, @$rules;
5e1267a5
DM		 1468 }
1469
1470 return $res;
1471}
1472
06320eb0
DM		 1473sub run_locked {
1474 my ($code, @param) = @_;
1475
1476 my $timeout = 10;
1477
1478 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
1479
1480 die $@ if $@;
1481
1482 return $res;
1483}
1484
5e1267a5
DM		 1485sub read_local_vm_config {
1486
1487 my $openvz = {};
5e1267a5
DM		 1488 my $qemu = {};
1489
c8301d63 1490 my $vmdata = { openvz => $openvz, qemu => $qemu };
5e1267a5 1491
c8301d63
DM		 1492 my $vmlist = PVE::Cluster::get_vmlist();
1493 return $vmdata if !$vmlist || !$vmlist->{ids};
1494 my $ids = $vmlist->{ids};
1495
1496 foreach my $vmid (keys %$ids) {
1497 next if !$vmid; # skip VE0
1498 my $d = $ids->{$vmid};
1499 next if !$d->{node} || $d->{node} ne $nodename;
1500 next if !$d->{type};
1501 if ($d->{type} eq 'openvz') {
1502 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
1503 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1504 $openvz->{$vmid} = $conf;
1505 }
1506 } elsif ($d->{type} eq 'qemu') {
1507 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
1508 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1509 $qemu->{$vmid} = $conf;
1510 }
5e1267a5
DM		 1511 }
1512 }
c8301d63 1513
5e1267a5
DM		 1514 return $vmdata;
1515};
1516
6fc63ffd 1517sub read_vm_firewall_configs {
5e1267a5 1518 my ($vmdata) = @_;
6fc63ffd 1519 my $vmfw_configs = {};
c8301d63 1520
5e1267a5
DM		 1521 foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
1522 my $filename = "/etc/pve/firewall/$vmid.fw";
1523 my $fh = IO::File->new($filename, O_RDONLY);
1524 next if !$fh;
1525
6fc63ffd 1526 $vmfw_configs->{$vmid} = parse_vm_fw_rules($filename, $fh);
5e1267a5
DM		 1527 }
1528
6fc63ffd 1529 return $vmfw_configs;
5e1267a5
DM		 1530}
1531
2d404ffc
DM		 1532sub get_option_log_level {
1533 my ($options, $k) = @_;
1534
1535 my $v = $options->{$k};
178a63be 1536 $v = $default_log_level if !defined($v);
2d404ffc
DM		 1537
1538 return undef if $v eq '' || $v eq 'nolog';
1539
1540 $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
1541
1542 return $v if ($v >= 0) && ($v <= 7);
1543
1544 warn "unknown log level ($k = '$v')\n";
1545
1546 return undef;
1547}
1548
d8f2505e 1549sub generate_std_chains {
2d404ffc
DM		 1550 my ($ruleset, $options) = @_;
1551
1552 my $loglevel = get_option_log_level($options, 'smurf_log_level');
1553
1554 # same as shorewall smurflog.
1555 if (defined($loglevel)) {
1556 $pve_std_chains-> {'PVEFW-smurflog'} = [
2f3d8d76 1557 "-j LOG --log-prefix \"smurfs-dropped: \" --log-level $loglevel",
2d404ffc
DM		 1558 "-j DROP",
1559 ];
1560 } else {
1561 $pve_std_chains-> {'PVEFW-smurflog'} = [ "-j DROP" ];
1562 }
1563
1564 # same as shorewall logflags action.
1565 $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
1566 if (defined($loglevel)) {
1567 $pve_std_chains-> {'PVEFW-logflags'} = [
2f3d8d76 1568 "-j LOG --log-prefix \"logflags-dropped: \" --log-level $loglevel --log-ip-options",
2d404ffc
DM		 1569 "-j DROP",
1570 ];
1571 } else {
1572 $pve_std_chains-> {'PVEFW-logflags'} = [ "-j DROP" ];
1573 }
d8f2505e
DM		 1574
1575 foreach my $chain (keys %$pve_std_chains) {
1576 ruleset_create_chain($ruleset, $chain);
1577 foreach my $rule (@{$pve_std_chains->{$chain}}) {
1578 if (ref($rule)) {
1579 ruleset_generate_rule($ruleset, $chain, $rule);
1580 } else {
1581 ruleset_addrule($ruleset, $chain, $rule);
1582 }
1583 }
1584 }
1585}
1586
6b9f68a2
DM		 1587sub save_pvefw_status {
1588 my ($status) = @_;
1589
1590 die "unknown status '$status' - internal error"
1591 if $status !~ m/^(stopped|active)$/;
1592
1593 mkdir dirname($pve_fw_status_filename);
1594 PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
1595}
1596
1597sub read_pvefw_status {
1598
1599 my $status = 'unknown';
1600
1601 return 'stopped' if ! -f $pve_fw_status_filename;
1602
1603 eval {
1604 $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
1605 };
1606 warn $@ if $@;
1607
1608 return $status;
1609}
1610
530c005e
DM		 1611# fixme: move to pve-common PVE::ProcFSTools
1612sub read_proc_net_route {
1613 my $filename = "/proc/net/route";
1614
1615 my $res = {};
1616
1617 my $fh = IO::File->new ($filename, "r");
1618 return $res if !$fh;
1619
1620 my $int_to_quad = sub {
1621 return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
1622 };
1623
1624 while (defined(my $line = <$fh>)) {
1625 next if $line =~/^Iface\s+Destination/; # skip head
1626 my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
1627 push @{$res->{$iface}}, {
1628 dest => &$int_to_quad(hex($dest)),
1629 gateway => &$int_to_quad(hex($gateway)),
1630 mask => &$int_to_quad(hex($mask)),
1631 metric => $metric,
1632 mtu => $mtu,
1633 };
1634 }
1635
1636 return $res;
1637}
1638
5e1267a5 1639sub compile {
5e1267a5 1640 my $vmdata = read_local_vm_config();
6fc63ffd 1641 my $vmfw_configs = read_vm_firewall_configs($vmdata);
6158271d 1642
530c005e
DM		 1643 my $routing_table = read_proc_net_route();
1644
92e976b3 1645 my $groups_conf = {};
51bae274
DM		 1646 my $filename = "/etc/pve/firewall/groups.fw";
1647 if (my $fh = IO::File->new($filename, O_RDONLY)) {
92e976b3 1648 $groups_conf = parse_group_fw_rules($filename, $fh);
51bae274 1649 }
5e1267a5 1650
3fa83edf
DM		 1651 my $ruleset = {};
1652
dec84fcd
DM		 1653 ruleset_create_chain($ruleset, "PVEFW-INPUT");
1654 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
5b1df9a0 1655
fadb13dd 1656 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3fa83edf 1657
92e976b3 1658 my $hostfw_options = {};
6d2ab017 1659 my $hostfw_conf = {};
4e6112f9 1660
51bae274
DM		 1661 $filename = "/etc/pve/local/host.fw";
1662 if (my $fh = IO::File->new($filename, O_RDONLY)) {
92e976b3
DM		 1663 $hostfw_conf = parse_host_fw_rules($filename, $fh);
1664 $hostfw_options = $hostfw_conf->{options};
2d404ffc 1665 }
fadb13dd 1666
92e976b3 1667 generate_std_chains($ruleset, $hostfw_options);
fadb13dd 1668
6d2ab017 1669 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2d404ffc 1670
d18c1e2b 1671 enable_host_firewall($ruleset, $hostfw_conf, $groups_conf) if $hostfw_enable;
3fa83edf 1672
6158271d 1673 # generate firewall rules for QEMU VMs
3fa83edf
DM		 1674 foreach my $vmid (keys %{$vmdata->{qemu}}) {
1675 my $conf = $vmdata->{qemu}->{$vmid};
6fc63ffd 1676 my $vmfw_conf = $vmfw_configs->{$vmid};
fa9c4a6f
DM		 1677 next if !$vmfw_conf;
1678 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
3fa83edf
DM		 1679
1680 foreach my $netid (keys %$conf) {
1681 next if $netid !~ m/^net(\d+)$/;
1682 my $net = PVE::QemuServer::parse_net($conf->{$netid});
1683 next if !$net;
1684 my $iface = "tap${vmid}i$1";
5e1267a5 1685
3fa83edf
DM		 1686 my $bridge = $net->{bridge};
1687 next if !$bridge; # fixme: ?
1688
1689 $bridge .= "v$net->{tag}" if $net->{tag};
1690
530c005e 1691 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
3fa83edf 1692
c29f55c9 1693 my $macaddr = $net->{macaddr};
92e976b3
DM		 1694 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'IN');
1695 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'OUT');
3fa83edf
DM		 1696 }
1697 }
c8301d63
DM		 1698
1699 # generate firewall rules for OpenVZ containers
1700 foreach my $vmid (keys %{$vmdata->{openvz}}) {
1701 my $conf = $vmdata->{openvz}->{$vmid};
1702
1703 my $vmfw_conf = $vmfw_configs->{$vmid};
1704 next if !$vmfw_conf;
1705 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
1706
1707 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
1708 my $ip = $conf->{ip_address}->{value};
9e15114a
DM		 1709 generate_venet_rules_direction($ruleset, $groups_conf, $vmfw_conf, $vmid, $ip, 'IN');
1710 generate_venet_rules_direction($ruleset, $groups_conf, $vmfw_conf, $vmid, $ip, 'OUT');
c8301d63
DM		 1711 }
1712
1713 if ($conf->{netif} && $conf->{netif}->{value}) {
1714 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
c8301d63
DM		 1715 foreach my $netid (keys %$netif) {
1716 my $d = $netif->{$netid};
1717 my $bridge = $d->{bridge};
1718 if (!$bridge) {
1719 warn "no bridge device for CT $vmid iface '$netid'\n";
1720 next; # fixme?
1721 }
530c005e
DM		 1722
1723 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
1724
12d0f130 1725 my $macaddr = $d->{mac};
c8301d63
DM		 1726 my $iface = $d->{host_ifname};
1727 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'IN');
1728 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'OUT');
1729 }
1730 }
1731 }
c0413e35 1732
98aa911e
DM		 1733 # fixme: this is an optimization? if so, we should also drop INVALID packages?
1734 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1735
eba0fb64
DM		 1736 # fixme: what log level should we use here?
1737 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
1738
c98c037d
DM		 1739 # fixme: should we really block inter-bridge traffic?
1740
1741 # always allow traffic from containers?
1742 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN");
1743
eba0fb64
DM		 1744 # disable interbridge routing
1745 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop");
1746 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop");
1747 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j LOG --log-prefix \"PVEFW-FORWARD-dropped \" --log-level $loglevel");
1748 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j LOG --log-prefix \"PVEFW-FORWARD-dropped \" --log-level $loglevel");
1749 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP");
1750 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP");
1751
490cdead 1752 return wantarray ? ($ruleset, $hostfw_conf) : $ruleset;
3fa83edf
DM		 1753}
1754
1755sub get_ruleset_status {
1756 my ($ruleset, $verbose) = @_;
1757
1758 my $active_chains = iptables_get_chains();
1759
1760 my $statushash = {};
1761
1762 foreach my $chain (sort keys %$ruleset) {
09d5f68e 1763 my $digest = Digest::SHA->new('sha1');
3fa83edf
DM		 1764 foreach my $cmd (@{$ruleset->{$chain}}) {
1765 $digest->add("$cmd\n");
1766 }
1767 my $sig = $digest->b64digest;
1768 $statushash->{$chain}->{sig} = $sig;
1769
1770 my $oldsig = $active_chains->{$chain};
1771 if (!defined($oldsig)) {
1772 $statushash->{$chain}->{action} = 'create';
1773 } else {
1774 if ($oldsig eq $sig) {
1775 $statushash->{$chain}->{action} = 'exists';
1776 } else {
1777 $statushash->{$chain}->{action} = 'update';
1778 }
1779 }
1780 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
1781 foreach my $cmd (@{$ruleset->{$chain}}) {
1782 print "\t$cmd\n" if $verbose;
1783 }
1784 }
1785
1786 foreach my $chain (sort keys %$active_chains) {
1787 if (!defined($ruleset->{$chain})) {
1788 my $sig = $active_chains->{$chain};
1789 $statushash->{$chain}->{action} = 'delete';
1790 $statushash->{$chain}->{sig} = $sig;
1791 print "delete $chain ($sig)\n" if $verbose;
1792 }
6158271d 1793 }
3fa83edf
DM		 1794
1795 return $statushash;
1796}
1797
1798sub print_ruleset {
1799 my ($ruleset) = @_;
1800
1801 get_ruleset_status($ruleset, 1);
1802}
1803
1804sub print_sig_rule {
1805 my ($chain, $sig) = @_;
1806
09d5f68e
DM		 1807 # We just use this to store a SHA1 checksum used to detect changes
1808 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
b6360c3f
DM		 1809}
1810
6b9f68a2 1811sub get_rulset_cmdlist {
a84f4d96 1812 my ($ruleset, $verbose) = @_;
3fa83edf 1813
3fa83edf
DM		 1814 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
1815
1816 my $statushash = get_ruleset_status($ruleset, $verbose);
1817
1818 # create missing chains first
1819 foreach my $chain (sort keys %$ruleset) {
1820 my $stat = $statushash->{$chain};
1821 die "internal error" if !$stat;
1822 next if $stat->{action} ne 'create';
886aba9c 1823
3fa83edf
DM		 1824 $cmdlist .= ":$chain - [0:0]\n";
1825 }
1826
dec84fcd 1827 my $rule = "INPUT -j PVEFW-INPUT";
3fa83edf
DM		 1828 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1829 $cmdlist .= "-A $rule\n";
1830 }
dec84fcd 1831 $rule = "OUTPUT -j PVEFW-OUTPUT";
3fa83edf
DM		 1832 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1833 $cmdlist .= "-A $rule\n";
1834 }
1835
dec84fcd 1836 $rule = "FORWARD -j PVEFW-FORWARD";
3fa83edf
DM		 1837 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1838 $cmdlist .= "-A $rule\n";
1839 }
1840
1841 foreach my $chain (sort keys %$ruleset) {
1842 my $stat = $statushash->{$chain};
1843 die "internal error" if !$stat;
1844
1845 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
1846 $cmdlist .= "-F $chain\n";
1847 foreach my $cmd (@{$ruleset->{$chain}}) {
1848 $cmdlist .= "$cmd\n";
1849 }
1850 $cmdlist .= print_sig_rule($chain, $stat->{sig});
1851 } elsif ($stat->{action} eq 'delete') {
f5d28682 1852 die "internal error"; # this should not happen
3fa83edf
DM		 1853 } elsif ($stat->{action} eq 'exists') {
1854 # do nothing
1855 } else {
1856 die "internal error - unknown status '$stat->{action}'";
1857 }
1858 }
1859
f5d28682
DM		 1860 foreach my $chain (keys %$statushash) {
1861 next if $statushash->{$chain}->{action} ne 'delete';
1862 $cmdlist .= "-F $chain\n";
1863 }
1864 foreach my $chain (keys %$statushash) {
1865 next if $statushash->{$chain}->{action} ne 'delete';
fadb13dd
DM		 1866 next if $chain eq 'PVEFW-INPUT';
1867 next if $chain eq 'PVEFW-OUTPUT';
1868 next if $chain eq 'PVEFW-FORWARD';
f5d28682
DM		 1869 $cmdlist .= "-X $chain\n";
1870 }
1871
3fa83edf
DM		 1872 $cmdlist .= "COMMIT\n";
1873
6b9f68a2
DM		 1874 return $cmdlist;
1875}
1876
1877sub apply_ruleset {
edb75ba9 1878 my ($ruleset, $hostfw_conf, $verbose) = @_;
6b9f68a2
DM		 1879
1880 enable_bridge_firewall();
1881
edb75ba9
DM		 1882 update_nf_conntrack_max($hostfw_conf);
1883
6b9f68a2
DM		 1884 my $cmdlist = get_rulset_cmdlist($ruleset, $verbose);
1885
3fa83edf
DM		 1886 print $cmdlist if $verbose;
1887
1888 iptables_restore_cmdlist($cmdlist);
1889
6158271d 1890 # test: re-read status and check if everything is up to date
6b9f68a2 1891 my $statushash = get_ruleset_status($ruleset);
3fa83edf
DM		 1892
1893 my $errors;
1894 foreach my $chain (sort keys %$ruleset) {
1895 my $stat = $statushash->{$chain};
1896 if ($stat->{action} ne 'exists') {
1897 warn "unable to update chain '$chain'\n";
1898 $errors = 1;
1899 }
1900 }
b6360c3f 1901
3fa83edf 1902 die "unable to apply firewall changes\n" if $errors;
b6360c3f
DM		 1903}
1904
490cdead
DM		 1905sub update_nf_conntrack_max {
1906 my ($hostfw_conf) = @_;
1907
1908 my $max = 65536; # reasonable default
1909
1910 my $options = $hostfw_conf->{options} || {};
1911
1912 if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
1913 $max = $options->{nf_conntrack_max};
1914 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
1915 }
1916
1917 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
1918 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
1919
1920 my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
1921
1922 if ($current != $max) {
1923 my $hashsize = int($max/4);
1924 PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
1925 PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
1926 }
1927}
1928
6b9f68a2
DM		 1929sub update {
1930 my ($start, $verbose) = @_;
1931
1932 my $code = sub {
1933 my $status = read_pvefw_status();
1934
490cdead
DM		 1935 my ($ruleset, $hostfw_conf) = PVE::Firewall::compile();
1936
6b9f68a2
DM		 1937 if ($start || $status eq 'active') {
1938
1939 save_pvefw_status('active') if ($status ne 'active');
1940
edb75ba9 1941 apply_ruleset($ruleset, $hostfw_conf, $verbose);
6b9f68a2
DM		 1942 } else {
1943 print "Firewall not active (status = $status)\n" if $verbose;
1944 }
1945 };
1946
1947 run_locked($code);
1948}
1949
1950
b6360c3f 19511;
Firewall test scripts