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use signalfd instead of g_unix_signal_add
[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
ba0b3a0a 21# fixme: remove loglevel settings? NFLOG does not have --loglevel
46b40c26 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, $chain) = @_;
3a616aa0 820
d050c724 821 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
782c4cde 822 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
d050c724 823
3fa83edf
DM		 824 die "chain '$chain' already exists\n" if $ruleset->{$chain};
825
826 $ruleset->{$chain} = [];
3a616aa0
AD		 827}
828
3fa83edf
DM		 829sub ruleset_chain_exist {
830 my ($ruleset, $chain) = @_;
3a616aa0 831
3fa83edf
DM		 832 return $ruleset->{$chain} ? 1 : undef;
833}
3a616aa0 834
3fa83edf
DM		 835sub ruleset_addrule {
836 my ($ruleset, $chain, $rule) = @_;
3a616aa0 837
3fa83edf 838 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 839
3fa83edf
DM		 840 push @{$ruleset->{$chain}}, "-A $chain $rule";
841}
3a616aa0 842
3fa83edf
DM		 843sub ruleset_insertrule {
844 my ($ruleset, $chain, $rule) = @_;
3a616aa0 845
3fa83edf 846 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 847
3fa83edf
DM		 848 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
849}
3a616aa0 850
782c4cde
DM		 851sub get_log_rule_base {
852 my ($chain, $vmid, $msg, $loglevel) = @_;
853
854 die "internal error - no log level" if !defined($loglevel);
855
856 $vmid = 0 if !defined($vmid);
857
858 # Note: we use special format for prefix to pass further
859 # info to log daemon (VMID, LOGVELEL and CHAIN)
860
861 return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
862}
863
864sub ruleset_addlog {
865 my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
866
867 return if !defined($loglevel);
868
869 my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
870
871 $logrule = "$rule $logrule" if defined($rule);
872
873 ruleset_addrule($ruleset, $chain, $logrule)
874}
875
3fa83edf 876sub generate_bridge_chains {
530c005e
DM		 877 my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_;
878
879 my $options = $hostfw_conf->{options} || {};
880
881 die "error: detected direct route to bridge '$bridge'\n"
882 if !$options->{allow_bridge_route} && $routing_table->{$bridge};
2f3d8d76 883
5927497d
DM		 884 if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
885 ruleset_create_chain($ruleset, "$bridge-FW");
3cc81077
DM		 886 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-out -j $bridge-FW");
887 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-in -j $bridge-FW");
3fa83edf 888 }
3a616aa0 889
3fa83edf
DM		 890 if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
891 ruleset_create_chain($ruleset, "$bridge-OUT");
3cc81077
DM		 892 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-in -j $bridge-OUT");
893 ruleset_insertrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-in -j $bridge-OUT");
9fcad984
AD		 894 }
895
896 if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
897 ruleset_create_chain($ruleset, "$bridge-IN");
3cc81077 898 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j $bridge-IN");
fdb0bf20 899 ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
7323008d 900 # accept traffic to unmanaged bridge ports
3cc81077 901 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j ACCEPT ");
3fa83edf
DM		 902 }
903}
3a616aa0 904
ead850e8 905sub ruleset_add_chain_policy {
782c4cde 906 my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
ead850e8
DM		 907
908 if ($policy eq 'ACCEPT') {
909
910 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
911 { ACCEPT => $accept_action});
912
913 } elsif ($policy eq 'DROP') {
914
915 ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
916
782c4cde 917 ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
ead850e8
DM		 918
919 ruleset_addrule($ruleset, $chain, "-j DROP");
920 } elsif ($policy eq 'REJECT') {
921 ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
922
782c4cde 923 ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
ead850e8
DM		 924
925 ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
926 } else {
927 # should not happen
928 die "internal error: unknown policy '$policy'";
929 }
930}
931
9e15114a
DM		 932sub ruleset_create_vm_chain {
933 my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
3a616aa0 934
9e15114a 935 ruleset_create_chain($ruleset, $chain);
3a616aa0 936
bee633ab 937 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
9e15114a 938 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
bee633ab
DM		 939 }
940
ce15d90b 941 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
9e15114a 942 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 67:68 -j ACCEPT");
ce15d90b
DM		 943 }
944
bee633ab 945 if ($options->{tcpflags}) {
9e15114a 946 ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
bee633ab
DM		 947 }
948
9e15114a
DM		 949 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
950 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
3a616aa0 951
b21aca2c
DM		 952 if ($direction eq 'OUT') {
953 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
9e15114a 954 ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
b21aca2c 955 }
9e15114a 956 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
c29f55c9 957 }
9e15114a
DM		 958}
959
960sub ruleset_generate_vm_rules {
961 my ($ruleset, $rules, $groups_conf, $chain, $netid, $direction) = @_;
962
963 my $lc_direction = lc($direction);
c29f55c9 964
92e976b3
DM		 965 foreach my $rule (@$rules) {
966 next if $rule->{iface} && $rule->{iface} ne $netid;
967 next if $rule->{disable};
968 if ($rule->{type} eq 'group') {
969 my $group_chain = "GROUP-$rule->{action}-$direction";
970 if(!ruleset_chain_exist($ruleset, $group_chain)){
971 generate_group_rules($ruleset, $groups_conf, $rule->{action});
972 }
9e15114a
DM		 973 ruleset_addrule($ruleset, $chain, "-j $group_chain");
974 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j RETURN")
92e976b3
DM		 975 if $direction eq 'OUT';
976 } else {
977 next if $rule->{type} ne $lc_direction;
978 if ($direction eq 'OUT') {
9e15114a 979 ruleset_generate_rule($ruleset, $chain, $rule,
92e976b3 980 { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
4e6112f9 981 } else {
9e15114a 982 ruleset_generate_rule($ruleset, $chain, $rule, { REJECT => "PVEFW-reject" });
3a616aa0 983 }
4e6112f9 984 }
3a616aa0 985 }
9e15114a
DM		 986}
987
988sub generate_venet_rules_direction {
989 my ($ruleset, $groups_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
990
5176619e 991 parse_address_list($ip); # make sure we have a valid $ip list
9e15114a
DM		 992
993 my $lc_direction = lc($direction);
994
995 my $rules = $vmfw_conf->{rules};
996
997 my $options = $vmfw_conf->{options};
998 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
999
1000 my $chain = "venet0-$vmid-$direction";
1001
1002 ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1003
1004 ruleset_generate_vm_rules($ruleset, $rules, $groups_conf, $chain, 'venet', $direction);
1005
1006 # implement policy
1007 my $policy;
1008
1009 if ($direction eq 'OUT') {
1010 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1011 } else {
1012 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1013 }
1014
1015 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : "ACCEPT";
782c4cde 1016 ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
9e15114a 1017
38485daa 1018 # plug into FORWARD, INPUT and OUTPUT chain
eba0fb64
DM		 1019 if ($direction eq 'OUT') {
1020 ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD", {
1021 action => $chain,
1022 source => $ip,
1023 iface_in => 'venet0'});
38485daa
DM		 1024
1025 ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT", {
1026 action => $chain,
1027 source => $ip,
1028 iface_in => 'venet0'});
eba0fb64
DM		 1029 } else {
1030 ruleset_generate_rule($ruleset, "PVEFW-FORWARD", {
1031 action => $chain,
1032 dest => $ip,
1033 iface_out => 'venet0'});
38485daa
DM		 1034
1035 ruleset_generate_rule($ruleset, "PVEFW-OUTPUT", {
1036 action => $chain,
1037 dest => $ip,
1038 iface_out => 'venet0'});
eba0fb64 1039 }
9e15114a
DM		 1040}
1041
1042sub generate_tap_rules_direction {
782c4cde 1043 my ($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_;
9e15114a
DM		 1044
1045 my $lc_direction = lc($direction);
1046
1047 my $rules = $vmfw_conf->{rules};
1048
1049 my $options = $vmfw_conf->{options};
1050 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1051
1052 my $tapchain = "$iface-$direction";
1053
1054 ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1055
1056 ruleset_generate_vm_rules($ruleset, $rules, $groups_conf, $tapchain, $netid, $direction);
3a616aa0 1057
ccae0b50
DM		 1058 # implement policy
1059 my $policy;
1060
1061 if ($direction eq 'OUT') {
72f63fde 1062 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
ccae0b50 1063 } else {
72f63fde 1064 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
ccae0b50
DM		 1065 }
1066
ead850e8 1067 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : "ACCEPT";
782c4cde 1068 ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
3a616aa0 1069
3fa83edf 1070 # plug the tap chain to bridge chain
3cc81077
DM		 1071 if ($direction eq 'IN') {
1072 ruleset_insertrule($ruleset, "$bridge-IN",
1073 "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1074 } else {
1075 ruleset_insertrule($ruleset, "$bridge-OUT",
1076 "-m physdev --physdev-in $iface -j $tapchain");
1077 }
3a616aa0
AD		 1078}
1079
d18c1e2b 1080sub enable_host_firewall {
92e976b3 1081 my ($ruleset, $hostfw_conf, $groups_conf) = @_;
0bd5f137 1082
51bae274 1083 # fixme: allow security groups
0bd5f137 1084
92e976b3
DM		 1085 my $options = $hostfw_conf->{options};
1086 my $rules = $hostfw_conf->{rules};
178a63be 1087
3fa83edf 1088 # host inbound firewall
dec84fcd
DM		 1089 my $chain = "PVEFW-HOST-IN";
1090 ruleset_create_chain($ruleset, $chain);
0bd5f137 1091
178a63be
DM		 1092 my $loglevel = get_option_log_level($options, "log_level_in");
1093
7fab95bc
DM		 1094 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1095 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
dec84fcd
DM		 1096 ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1097 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
97156ecc 1098 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
dec84fcd 1099 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 1100
23e888f8
DM		 1101 # we use RETURN because we need to check also tap rules
1102 my $accept_action = 'RETURN';
1103
92e976b3
DM		 1104 foreach my $rule (@$rules) {
1105 next if $rule->{type} ne 'in';
23e888f8 1106 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
0bd5f137
AD		 1107 }
1108
23e888f8 1109 # implement input policy
72f63fde 1110 my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
782c4cde 1111 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
0bd5f137 1112
3fa83edf 1113 # host outbound firewall
aadd745e 1114 $chain = "PVEFW-HOST-OUT";
dec84fcd
DM		 1115 ruleset_create_chain($ruleset, $chain);
1116
178a63be
DM		 1117 $loglevel = get_option_log_level($options, "log_level_out");
1118
7fab95bc
DM		 1119 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1120 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
dec84fcd
DM		 1121 ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1122 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
97156ecc 1123 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
dec84fcd 1124 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 1125
23e888f8
DM		 1126 # we use RETURN because we may want to check other thigs later
1127 $accept_action = 'RETURN';
1128
92e976b3
DM		 1129 foreach my $rule (@$rules) {
1130 next if $rule->{type} ne 'out';
23e888f8 1131 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
0bd5f137
AD		 1132 }
1133
23e888f8 1134 # implement output policy
72f63fde 1135 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
782c4cde 1136 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
6158271d 1137
dec84fcd
DM		 1138 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1139 ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
9d31b418
AD		 1140}
1141
1142sub generate_group_rules {
92e976b3 1143 my ($ruleset, $groups_conf, $group) = @_;
9d31b418 1144
92e976b3 1145 die "no such security group '$group'\n" if !$groups_conf->{$group};
9d31b418 1146
92e976b3 1147 my $rules = $groups_conf->{$group}->{rules};
6158271d 1148
3fa83edf 1149 my $chain = "GROUP-${group}-IN";
9d31b418 1150
3fa83edf 1151 ruleset_create_chain($ruleset, $chain);
9d31b418 1152
92e976b3
DM		 1153 foreach my $rule (@$rules) {
1154 next if $rule->{type} ne 'in';
1155 ruleset_generate_rule($ruleset, $chain, $rule, { REJECT => "PVEFW-reject" });
9d31b418
AD		 1156 }
1157
3fa83edf 1158 $chain = "GROUP-${group}-OUT";
9d31b418 1159
3fa83edf 1160 ruleset_create_chain($ruleset, $chain);
4e6112f9 1161 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
9d31b418 1162
92e976b3
DM		 1163 foreach my $rule (@$rules) {
1164 next if $rule->{type} ne 'out';
1165 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1166 # check also other tap rules later
1167 ruleset_generate_rule($ruleset, $chain, $rule,
1168 { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
9d31b418 1169 }
9d31b418
AD		 1170}
1171
51bae274
DM		 1172my $MAX_NETS = 32;
1173my $valid_netdev_names = {};
1174for (my $i = 0; $i < $MAX_NETS; $i++) {
1175 $valid_netdev_names->{"net$i"} = 1;
1176}
5e1267a5 1177
51bae274
DM		 1178sub parse_fw_rule {
1179 my ($line, $need_iface, $allow_groups) = @_;
5e1267a5 1180
a332200b 1181 my $macros = get_firewall_macros();
fcba0beb 1182 my $protocols = get_etc_protocols();
51bae274 1183
92e976b3 1184 my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
51bae274 1185
11bac5c2
DM		 1186 # we can add single line comments to the end of the rule
1187 my $comment = $1 if $line =~ s/#\s*(.*?)\s*$//;
1188
1189 # we can disable a rule when prefixed with '|'
1190 my $disable = 1 if $line =~ s/^\|//;
51bae274
DM		 1191
1192 my @data = split(/\s+/, $line);
92e976b3 1193 my $expected_elements = $need_iface ? 8 : 7;
51bae274
DM		 1194
1195 die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1196
1197 if ($need_iface) {
92e976b3 1198 ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
51bae274 1199 } else {
92e976b3 1200 ($type, $action, $source, $dest, $proto, $dport, $sport) = @data;
51bae274
DM		 1201 }
1202
92e976b3 1203 die "incomplete rule\n" if ! ($type && $action);
51bae274 1204
961b4928
DM		 1205 my $macro;
1206 my $macro_name;
1207
92e976b3
DM		 1208 $type = lc($type);
1209
1210 if ($type eq 'in' || $type eq 'out') {
1211 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1212 # OK
1213 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1214 ($macro_name, $action) = ($1, $2);
1215 my $lc_macro_name = lc($macro_name);
1216 my $preferred_name = $pve_fw_preferred_macro_names->{$lc_macro_name};
1217 $macro_name = $preferred_name if $preferred_name;
1218 $macro = $macros->{$lc_macro_name};
1219 die "unknown macro '$macro_name'\n" if !$macro;
1220 } else {
1221 die "unknown action '$action'\n";
1222 }
1223 } elsif ($type eq 'group') {
1224 die "wrong number of rule elements\n" if scalar(@data) != 3;
1225 die "groups disabled\n" if !$allow_groups;
1226
1227 die "invalid characters in group name\n" if $action !~ m/^[A-Za-z0-9_\-]+$/;
51bae274 1228 } else {
92e976b3 1229 die "unknown rule type '$type'\n";
51bae274
DM		 1230 }
1231
1232 if ($need_iface) {
1233 $iface = undef if $iface && $iface eq '-';
51bae274
DM		 1234 }
1235
1236 $proto = undef if $proto && $proto eq '-';
6158271d 1237 die "unknown protokol '$proto'\n" if $proto &&
51bae274
DM		 1238 !(defined($protocols->{byname}->{$proto}) ||
1239 defined($protocols->{byid}->{$proto}));
1240
1241 $source = undef if $source && $source eq '-';
1242 $dest = undef if $dest && $dest eq '-';
1243
1244 $dport = undef if $dport && $dport eq '-';
1245 $sport = undef if $sport && $sport eq '-';
1246
51bae274
DM		 1247 my $nbsource = undef;
1248 my $nbdest = undef;
1249
1250 $nbsource = parse_address_list($source) if $source;
1251 $nbdest = parse_address_list($dest) if $dest;
6158271d 1252
961b4928 1253 my $rules = [];
51bae274 1254
961b4928 1255 my $param = {
92e976b3 1256 type => $type,
11bac5c2
DM		 1257 disable => $disable,
1258 comment => $comment,
51bae274 1259 action => $action,
51bae274
DM		 1260 iface => $iface,
1261 source => $source,
1262 dest => $dest,
1263 nbsource => $nbsource,
1264 nbdest => $nbdest,
1265 proto => $proto,
1266 dport => $dport,
1267 sport => $sport,
51bae274 1268 };
961b4928
DM		 1269
1270 if ($macro) {
1271 foreach my $templ (@$macro) {
1272 my $rule = {};
faf7be7e 1273 my $param_used = {};
961b4928
DM		 1274 foreach my $k (keys %$templ) {
1275 my $v = $templ->{$k};
857f62c8
DM		 1276 if ($v eq 'PARAM') {
1277 $v = $param->{$k};
faf7be7e 1278 $param_used->{$k} = 1;
857f62c8
DM		 1279 } elsif ($v eq 'DEST') {
1280 $v = $param->{dest};
faf7be7e 1281 $param_used->{dest} = 1;
857f62c8
DM		 1282 } elsif ($v eq 'SOURCE') {
1283 $v = $param->{source};
faf7be7e 1284 $param_used->{source} = 1;
857f62c8
DM		 1285 }
1286
961b4928
DM		 1287 die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
1288 $rule->{$k} = $v;
1289 }
faf7be7e
DM		 1290 foreach my $k (keys %$param) {
1291 next if !defined($param->{$k});
1292 next if $param_used->{$k};
1293 if (defined($rule->{$k})) {
1294 die "parameter '$k' already define in macro (value = '$rule->{$k}')\n"
1295 if $rule->{$k} ne $param->{$k};
1296 } else {
1297 $rule->{$k} = $param->{$k};
1298 }
1299 }
961b4928
DM		 1300 push @$rules, $rule;
1301 }
1302 } else {
1303 push @$rules, $param;
1304 }
1305
1306 foreach my $rule (@$rules) {
6158271d 1307 $rule->{nbdport} = parse_port_name_number_or_range($rule->{dport})
961b4928 1308 if defined($rule->{dport});
6158271d 1309 $rule->{nbsport} = parse_port_name_number_or_range($rule->{sport})
961b4928
DM		 1310 if defined($rule->{sport});
1311 }
1312
1313 return $rules;
51bae274
DM		 1314}
1315
2d404ffc 1316sub parse_vmfw_option {
85c6eaed
DM		 1317 my ($line) = @_;
1318
1319 my ($opt, $value);
1320
178a63be
DM		 1321 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1322
ce15d90b 1323 if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
9c6b6efd
DM		 1324 $opt = lc($1);
1325 $value = int($2);
178a63be
DM		 1326 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1327 $opt = lc($1);
1328 $value = $2 ? lc($3) : '';
72f63fde 1329 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
85c6eaed
DM		 1330 $opt = lc($1);
1331 $value = uc($3);
9c6b6efd 1332 } else {
85c6eaed
DM		 1333 chomp $line;
1334 die "can't parse option '$line'\n"
1335 }
1336
1337 return ($opt, $value);
1338}
1339
2d404ffc
DM		 1340sub parse_hostfw_option {
1341 my ($line) = @_;
1342
1343 my ($opt, $value);
1344
1345 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1346
530c005e 1347 if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags|allow_bridge_route):\s*(0|1)\s*$/i) {
2d404ffc
DM		 1348 $opt = lc($1);
1349 $value = int($2);
178a63be 1350 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2d404ffc
DM		 1351 $opt = lc($1);
1352 $value = $2 ? lc($3) : '';
72f63fde 1353 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2d404ffc
DM		 1354 $opt = lc($1);
1355 $value = uc($3);
490cdead
DM		 1356 } elsif ($line =~ m/^(nf_conntrack_max):\s*(\d+)\s*$/i) {
1357 $opt = lc($1);
1358 $value = int($2);
2d404ffc
DM		 1359 } else {
1360 chomp $line;
1361 die "can't parse option '$line'\n"
1362 }
1363
1364 return ($opt, $value);
1365}
1366
51bae274
DM		 1367sub parse_vm_fw_rules {
1368 my ($filename, $fh) = @_;
1369
92e976b3 1370 my $res = { rules => [], options => {}};
51bae274
DM		 1371
1372 my $section;
1373
5e1267a5
DM		 1374 while (defined(my $line = <$fh>)) {
1375 next if $line =~ m/^#/;
1376 next if $line =~ m/^\s*$/;
1377
961b4928
DM		 1378 my $linenr = $fh->input_line_number();
1379 my $prefix = "$filename (line $linenr)";
1380
85c6eaed 1381 if ($line =~ m/^\[(\S+)\]\s*$/i) {
5e1267a5 1382 $section = lc($1);
85c6eaed 1383 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
5e1267a5
DM		 1384 next;
1385 }
51bae274 1386 if (!$section) {
961b4928 1387 warn "$prefix: skip line - no section";
5e1267a5
DM		 1388 next;
1389 }
1390
85c6eaed
DM		 1391 next if !$res->{$section}; # skip undefined section
1392
1393 if ($section eq 'options') {
6158271d 1394 eval {
2d404ffc 1395 my ($opt, $value) = parse_vmfw_option($line);
85c6eaed
DM		 1396 $res->{options}->{$opt} = $value;
1397 };
1398 warn "$prefix: $@" if $@;
1399 next;
1400 }
1401
961b4928
DM		 1402 my $rules;
1403 eval { $rules = parse_fw_rule($line, 1, 1); };
51bae274 1404 if (my $err = $@) {
961b4928 1405 warn "$prefix: $err";
5e1267a5
DM		 1406 next;
1407 }
1408
961b4928 1409 push @{$res->{$section}}, @$rules;
51bae274
DM		 1410 }
1411
1412 return $res;
1413}
1414
1415sub parse_host_fw_rules {
1416 my ($filename, $fh) = @_;
1417
92e976b3 1418 my $res = { rules => [], options => {}};
51bae274
DM		 1419
1420 my $section;
1421
1422 while (defined(my $line = <$fh>)) {
1423 next if $line =~ m/^#/;
1424 next if $line =~ m/^\s*$/;
1425
961b4928
DM		 1426 my $linenr = $fh->input_line_number();
1427 my $prefix = "$filename (line $linenr)";
1428
2d404ffc 1429 if ($line =~ m/^\[(\S+)\]\s*$/i) {
51bae274 1430 $section = lc($1);
2d404ffc 1431 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
5e1267a5
DM		 1432 next;
1433 }
51bae274 1434 if (!$section) {
961b4928 1435 warn "$prefix: skip line - no section";
5e1267a5
DM		 1436 next;
1437 }
1438
2d404ffc
DM		 1439 next if !$res->{$section}; # skip undefined section
1440
1441 if ($section eq 'options') {
1442 eval {
2d404ffc
DM		 1443 my ($opt, $value) = parse_hostfw_option($line);
1444 $res->{options}->{$opt} = $value;
1445 };
1446 warn "$prefix: $@" if $@;
1447 next;
1448 }
1449
961b4928
DM		 1450 my $rules;
1451 eval { $rules = parse_fw_rule($line, 1, 1); };
ecbea048 1452 if (my $err = $@) {
961b4928 1453 warn "$prefix: $err";
ecbea048 1454 next;
ecbea048
DM		 1455 }
1456
961b4928 1457 push @{$res->{$section}}, @$rules;
51bae274 1458 }
ecbea048 1459
51bae274
DM		 1460 return $res;
1461}
4cdbb3b7 1462
51bae274
DM		 1463sub parse_group_fw_rules {
1464 my ($filename, $fh) = @_;
5e1267a5 1465
51bae274
DM		 1466 my $section;
1467 my $group;
1468
92e976b3 1469 my $res = { rules => [] };
6158271d 1470
51bae274
DM		 1471 while (defined(my $line = <$fh>)) {
1472 next if $line =~ m/^#/;
1473 next if $line =~ m/^\s*$/;
1474
961b4928
DM		 1475 my $linenr = $fh->input_line_number();
1476 my $prefix = "$filename (line $linenr)";
1477
92e976b3
DM		 1478 if ($line =~ m/^\[group\s+(\S+)\]\s*$/i) {
1479 $section = 'rules';
1480 $group = lc($1);
51bae274
DM		 1481 next;
1482 }
1483 if (!$section || !$group) {
961b4928 1484 warn "$prefix: skip line - no section";
51bae274
DM		 1485 next;
1486 }
1487
961b4928
DM		 1488 my $rules;
1489 eval { $rules = parse_fw_rule($line, 0, 0); };
51bae274 1490 if (my $err = $@) {
961b4928 1491 warn "$prefix: $err";
51bae274
DM		 1492 next;
1493 }
1494
961b4928 1495 push @{$res->{$group}->{$section}}, @$rules;
5e1267a5
DM		 1496 }
1497
1498 return $res;
1499}
1500
06320eb0
DM		 1501sub run_locked {
1502 my ($code, @param) = @_;
1503
1504 my $timeout = 10;
1505
1506 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
1507
1508 die $@ if $@;
1509
1510 return $res;
1511}
1512
5e1267a5
DM		 1513sub read_local_vm_config {
1514
1515 my $openvz = {};
5e1267a5
DM		 1516 my $qemu = {};
1517
c8301d63 1518 my $vmdata = { openvz => $openvz, qemu => $qemu };
5e1267a5 1519
c8301d63
DM		 1520 my $vmlist = PVE::Cluster::get_vmlist();
1521 return $vmdata if !$vmlist || !$vmlist->{ids};
1522 my $ids = $vmlist->{ids};
1523
1524 foreach my $vmid (keys %$ids) {
1525 next if !$vmid; # skip VE0
1526 my $d = $ids->{$vmid};
1527 next if !$d->{node} || $d->{node} ne $nodename;
1528 next if !$d->{type};
1529 if ($d->{type} eq 'openvz') {
1530 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
1531 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1532 $openvz->{$vmid} = $conf;
1533 }
1534 } elsif ($d->{type} eq 'qemu') {
1535 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
1536 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1537 $qemu->{$vmid} = $conf;
1538 }
5e1267a5
DM		 1539 }
1540 }
c8301d63 1541
5e1267a5
DM		 1542 return $vmdata;
1543};
1544
6fc63ffd 1545sub read_vm_firewall_configs {
5e1267a5 1546 my ($vmdata) = @_;
6fc63ffd 1547 my $vmfw_configs = {};
c8301d63 1548
5e1267a5
DM		 1549 foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
1550 my $filename = "/etc/pve/firewall/$vmid.fw";
1551 my $fh = IO::File->new($filename, O_RDONLY);
1552 next if !$fh;
1553
6fc63ffd 1554 $vmfw_configs->{$vmid} = parse_vm_fw_rules($filename, $fh);
5e1267a5
DM		 1555 }
1556
6fc63ffd 1557 return $vmfw_configs;
5e1267a5
DM		 1558}
1559
2d404ffc
DM		 1560sub get_option_log_level {
1561 my ($options, $k) = @_;
1562
1563 my $v = $options->{$k};
178a63be 1564 $v = $default_log_level if !defined($v);
2d404ffc
DM		 1565
1566 return undef if $v eq '' || $v eq 'nolog';
1567
1568 $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
1569
1570 return $v if ($v >= 0) && ($v <= 7);
1571
1572 warn "unknown log level ($k = '$v')\n";
1573
1574 return undef;
1575}
1576
d8f2505e 1577sub generate_std_chains {
2d404ffc
DM		 1578 my ($ruleset, $options) = @_;
1579
1580 my $loglevel = get_option_log_level($options, 'smurf_log_level');
1581
1582 # same as shorewall smurflog.
782c4cde
DM		 1583 my $chain = 'PVEFW-smurflog';
1584
1585 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
1586 push @{$pve_std_chains->{$chain}}, "-j DROP";
2d404ffc
DM		 1587
1588 # same as shorewall logflags action.
1589 $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
782c4cde
DM		 1590 $chain = 'PVEFW-logflags';
1591 # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
1592 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
1593 push @{$pve_std_chains->{$chain}}, "-j DROP";
d8f2505e
DM		 1594
1595 foreach my $chain (keys %$pve_std_chains) {
1596 ruleset_create_chain($ruleset, $chain);
1597 foreach my $rule (@{$pve_std_chains->{$chain}}) {
1598 if (ref($rule)) {
1599 ruleset_generate_rule($ruleset, $chain, $rule);
1600 } else {
1601 ruleset_addrule($ruleset, $chain, $rule);
1602 }
1603 }
1604 }
1605}
1606
6b9f68a2
DM		 1607sub save_pvefw_status {
1608 my ($status) = @_;
1609
1610 die "unknown status '$status' - internal error"
1611 if $status !~ m/^(stopped|active)$/;
1612
1613 mkdir dirname($pve_fw_status_filename);
1614 PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
1615}
1616
1617sub read_pvefw_status {
1618
1619 my $status = 'unknown';
1620
1621 return 'stopped' if ! -f $pve_fw_status_filename;
1622
1623 eval {
1624 $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
1625 };
1626 warn $@ if $@;
1627
1628 return $status;
1629}
1630
530c005e
DM		 1631# fixme: move to pve-common PVE::ProcFSTools
1632sub read_proc_net_route {
1633 my $filename = "/proc/net/route";
1634
1635 my $res = {};
1636
1637 my $fh = IO::File->new ($filename, "r");
1638 return $res if !$fh;
1639
1640 my $int_to_quad = sub {
1641 return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
1642 };
1643
1644 while (defined(my $line = <$fh>)) {
1645 next if $line =~/^Iface\s+Destination/; # skip head
1646 my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
1647 push @{$res->{$iface}}, {
1648 dest => &$int_to_quad(hex($dest)),
1649 gateway => &$int_to_quad(hex($gateway)),
1650 mask => &$int_to_quad(hex($mask)),
1651 metric => $metric,
1652 mtu => $mtu,
1653 };
1654 }
1655
1656 return $res;
1657}
1658
5e1267a5 1659sub compile {
5e1267a5 1660 my $vmdata = read_local_vm_config();
6fc63ffd 1661 my $vmfw_configs = read_vm_firewall_configs($vmdata);
6158271d 1662
530c005e
DM		 1663 my $routing_table = read_proc_net_route();
1664
92e976b3 1665 my $groups_conf = {};
51bae274
DM		 1666 my $filename = "/etc/pve/firewall/groups.fw";
1667 if (my $fh = IO::File->new($filename, O_RDONLY)) {
92e976b3 1668 $groups_conf = parse_group_fw_rules($filename, $fh);
51bae274 1669 }
5e1267a5 1670
3fa83edf
DM		 1671 my $ruleset = {};
1672
dec84fcd
DM		 1673 ruleset_create_chain($ruleset, "PVEFW-INPUT");
1674 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
5b1df9a0 1675
fadb13dd 1676 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3fa83edf 1677
92e976b3 1678 my $hostfw_options = {};
6d2ab017 1679 my $hostfw_conf = {};
4e6112f9 1680
51bae274
DM		 1681 $filename = "/etc/pve/local/host.fw";
1682 if (my $fh = IO::File->new($filename, O_RDONLY)) {
92e976b3
DM		 1683 $hostfw_conf = parse_host_fw_rules($filename, $fh);
1684 $hostfw_options = $hostfw_conf->{options};
2d404ffc 1685 }
fadb13dd 1686
92e976b3 1687 generate_std_chains($ruleset, $hostfw_options);
fadb13dd 1688
6d2ab017 1689 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2d404ffc 1690
d18c1e2b 1691 enable_host_firewall($ruleset, $hostfw_conf, $groups_conf) if $hostfw_enable;
3fa83edf 1692
6158271d 1693 # generate firewall rules for QEMU VMs
3fa83edf
DM		 1694 foreach my $vmid (keys %{$vmdata->{qemu}}) {
1695 my $conf = $vmdata->{qemu}->{$vmid};
6fc63ffd 1696 my $vmfw_conf = $vmfw_configs->{$vmid};
fa9c4a6f
DM		 1697 next if !$vmfw_conf;
1698 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
3fa83edf
DM		 1699
1700 foreach my $netid (keys %$conf) {
1701 next if $netid !~ m/^net(\d+)$/;
1702 my $net = PVE::QemuServer::parse_net($conf->{$netid});
1703 next if !$net;
1704 my $iface = "tap${vmid}i$1";
5e1267a5 1705
3fa83edf
DM		 1706 my $bridge = $net->{bridge};
1707 next if !$bridge; # fixme: ?
1708
1709 $bridge .= "v$net->{tag}" if $net->{tag};
1710
530c005e 1711 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
3fa83edf 1712
c29f55c9 1713 my $macaddr = $net->{macaddr};
782c4cde
DM		 1714 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr,
1715 $vmfw_conf, $vmid, $bridge, 'IN');
1716 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr,
1717 $vmfw_conf, $vmid, $bridge, 'OUT');
3fa83edf
DM		 1718 }
1719 }
c8301d63
DM		 1720
1721 # generate firewall rules for OpenVZ containers
1722 foreach my $vmid (keys %{$vmdata->{openvz}}) {
1723 my $conf = $vmdata->{openvz}->{$vmid};
1724
1725 my $vmfw_conf = $vmfw_configs->{$vmid};
1726 next if !$vmfw_conf;
1727 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
1728
1729 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
1730 my $ip = $conf->{ip_address}->{value};
9e15114a
DM		 1731 generate_venet_rules_direction($ruleset, $groups_conf, $vmfw_conf, $vmid, $ip, 'IN');
1732 generate_venet_rules_direction($ruleset, $groups_conf, $vmfw_conf, $vmid, $ip, 'OUT');
c8301d63
DM		 1733 }
1734
1735 if ($conf->{netif} && $conf->{netif}->{value}) {
1736 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
c8301d63
DM		 1737 foreach my $netid (keys %$netif) {
1738 my $d = $netif->{$netid};
1739 my $bridge = $d->{bridge};
1740 if (!$bridge) {
1741 warn "no bridge device for CT $vmid iface '$netid'\n";
1742 next; # fixme?
1743 }
530c005e
DM		 1744
1745 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
1746
12d0f130 1747 my $macaddr = $d->{mac};
c8301d63 1748 my $iface = $d->{host_ifname};
782c4cde
DM		 1749 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr,
1750 $vmfw_conf, $vmid, $bridge, 'IN');
1751 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr,
1752 $vmfw_conf, $vmid, $bridge, 'OUT');
c8301d63
DM		 1753 }
1754 }
1755 }
c0413e35 1756
98aa911e
DM		 1757 # fixme: this is an optimization? if so, we should also drop INVALID packages?
1758 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1759
eba0fb64
DM		 1760 # fixme: what log level should we use here?
1761 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
1762
c98c037d
DM		 1763 # fixme: should we really block inter-bridge traffic?
1764
1765 # always allow traffic from containers?
1766 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN");
1767
eba0fb64
DM		 1768 # disable interbridge routing
1769 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop");
1770 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop");
782c4cde
DM		 1771 ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-o vmbr+");
1772 ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-i vmbr+");
eba0fb64
DM		 1773 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP");
1774 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP");
1775
490cdead 1776 return wantarray ? ($ruleset, $hostfw_conf) : $ruleset;
3fa83edf
DM		 1777}
1778
1779sub get_ruleset_status {
1780 my ($ruleset, $verbose) = @_;
1781
1782 my $active_chains = iptables_get_chains();
1783
1784 my $statushash = {};
1785
1786 foreach my $chain (sort keys %$ruleset) {
09d5f68e 1787 my $digest = Digest::SHA->new('sha1');
3fa83edf
DM		 1788 foreach my $cmd (@{$ruleset->{$chain}}) {
1789 $digest->add("$cmd\n");
1790 }
1791 my $sig = $digest->b64digest;
1792 $statushash->{$chain}->{sig} = $sig;
1793
1794 my $oldsig = $active_chains->{$chain};
1795 if (!defined($oldsig)) {
1796 $statushash->{$chain}->{action} = 'create';
1797 } else {
1798 if ($oldsig eq $sig) {
1799 $statushash->{$chain}->{action} = 'exists';
1800 } else {
1801 $statushash->{$chain}->{action} = 'update';
1802 }
1803 }
1804 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
1805 foreach my $cmd (@{$ruleset->{$chain}}) {
1806 print "\t$cmd\n" if $verbose;
1807 }
1808 }
1809
1810 foreach my $chain (sort keys %$active_chains) {
1811 if (!defined($ruleset->{$chain})) {
1812 my $sig = $active_chains->{$chain};
1813 $statushash->{$chain}->{action} = 'delete';
1814 $statushash->{$chain}->{sig} = $sig;
1815 print "delete $chain ($sig)\n" if $verbose;
1816 }
6158271d 1817 }
3fa83edf
DM		 1818
1819 return $statushash;
1820}
1821
1822sub print_ruleset {
1823 my ($ruleset) = @_;
1824
1825 get_ruleset_status($ruleset, 1);
1826}
1827
1828sub print_sig_rule {
1829 my ($chain, $sig) = @_;
1830
09d5f68e
DM		 1831 # We just use this to store a SHA1 checksum used to detect changes
1832 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
b6360c3f
DM		 1833}
1834
6b9f68a2 1835sub get_rulset_cmdlist {
a84f4d96 1836 my ($ruleset, $verbose) = @_;
3fa83edf 1837
3fa83edf
DM		 1838 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
1839
1840 my $statushash = get_ruleset_status($ruleset, $verbose);
1841
1842 # create missing chains first
1843 foreach my $chain (sort keys %$ruleset) {
1844 my $stat = $statushash->{$chain};
1845 die "internal error" if !$stat;
1846 next if $stat->{action} ne 'create';
886aba9c 1847
3fa83edf
DM		 1848 $cmdlist .= ":$chain - [0:0]\n";
1849 }
1850
dec84fcd 1851 my $rule = "INPUT -j PVEFW-INPUT";
3fa83edf
DM		 1852 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1853 $cmdlist .= "-A $rule\n";
1854 }
dec84fcd 1855 $rule = "OUTPUT -j PVEFW-OUTPUT";
3fa83edf
DM		 1856 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1857 $cmdlist .= "-A $rule\n";
1858 }
1859
dec84fcd 1860 $rule = "FORWARD -j PVEFW-FORWARD";
3fa83edf
DM		 1861 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1862 $cmdlist .= "-A $rule\n";
1863 }
1864
1865 foreach my $chain (sort keys %$ruleset) {
1866 my $stat = $statushash->{$chain};
1867 die "internal error" if !$stat;
1868
1869 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
1870 $cmdlist .= "-F $chain\n";
1871 foreach my $cmd (@{$ruleset->{$chain}}) {
1872 $cmdlist .= "$cmd\n";
1873 }
1874 $cmdlist .= print_sig_rule($chain, $stat->{sig});
1875 } elsif ($stat->{action} eq 'delete') {
f5d28682 1876 die "internal error"; # this should not happen
3fa83edf
DM		 1877 } elsif ($stat->{action} eq 'exists') {
1878 # do nothing
1879 } else {
1880 die "internal error - unknown status '$stat->{action}'";
1881 }
1882 }
1883
f5d28682
DM		 1884 foreach my $chain (keys %$statushash) {
1885 next if $statushash->{$chain}->{action} ne 'delete';
1886 $cmdlist .= "-F $chain\n";
1887 }
1888 foreach my $chain (keys %$statushash) {
1889 next if $statushash->{$chain}->{action} ne 'delete';
fadb13dd
DM		 1890 next if $chain eq 'PVEFW-INPUT';
1891 next if $chain eq 'PVEFW-OUTPUT';
1892 next if $chain eq 'PVEFW-FORWARD';
f5d28682
DM		 1893 $cmdlist .= "-X $chain\n";
1894 }
1895
3fa83edf
DM		 1896 $cmdlist .= "COMMIT\n";
1897
6b9f68a2
DM		 1898 return $cmdlist;
1899}
1900
1901sub apply_ruleset {
edb75ba9 1902 my ($ruleset, $hostfw_conf, $verbose) = @_;
6b9f68a2
DM		 1903
1904 enable_bridge_firewall();
1905
edb75ba9
DM		 1906 update_nf_conntrack_max($hostfw_conf);
1907
6b9f68a2
DM		 1908 my $cmdlist = get_rulset_cmdlist($ruleset, $verbose);
1909
3fa83edf
DM		 1910 print $cmdlist if $verbose;
1911
1912 iptables_restore_cmdlist($cmdlist);
1913
6158271d 1914 # test: re-read status and check if everything is up to date
6b9f68a2 1915 my $statushash = get_ruleset_status($ruleset);
3fa83edf
DM		 1916
1917 my $errors;
1918 foreach my $chain (sort keys %$ruleset) {
1919 my $stat = $statushash->{$chain};
1920 if ($stat->{action} ne 'exists') {
1921 warn "unable to update chain '$chain'\n";
1922 $errors = 1;
1923 }
1924 }
b6360c3f 1925
3fa83edf 1926 die "unable to apply firewall changes\n" if $errors;
b6360c3f
DM		 1927}
1928
490cdead
DM		 1929sub update_nf_conntrack_max {
1930 my ($hostfw_conf) = @_;
1931
1932 my $max = 65536; # reasonable default
1933
1934 my $options = $hostfw_conf->{options} || {};
1935
1936 if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
1937 $max = $options->{nf_conntrack_max};
1938 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
1939 }
1940
1941 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
1942 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
1943
1944 my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
1945
1946 if ($current != $max) {
1947 my $hashsize = int($max/4);
1948 PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
1949 PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
1950 }
1951}
1952
6b9f68a2
DM		 1953sub update {
1954 my ($start, $verbose) = @_;
1955
1956 my $code = sub {
1957 my $status = read_pvefw_status();
1958
490cdead
DM		 1959 my ($ruleset, $hostfw_conf) = PVE::Firewall::compile();
1960
6b9f68a2
DM		 1961 if ($start || $status eq 'active') {
1962
1963 save_pvefw_status('active') if ($status ne 'active');
1964
edb75ba9 1965 apply_ruleset($ruleset, $hostfw_conf, $verbose);
6b9f68a2
DM		 1966 } else {
1967 print "Firewall not active (status = $status)\n" if $verbose;
1968 }
1969 };
1970
1971 run_locked($code);
1972}
1973
1974
b6360c3f 19751;
Firewall test scripts