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add optimization as last step
[pve-firewall.git] / src / PVE / Firewall.pm
CommitLineData
b6360c3f
DM		 1package PVE::Firewall;
2
3use warnings;
4use strict;
5use Data::Dumper;
09d5f68e 6use Digest::SHA;
c8301d63
DM		 7use PVE::INotify;
8use PVE::Cluster;
5f0a912c 9use PVE::ProcFSTools;
f789653a 10use PVE::Tools;
b6360c3f 11use PVE::QemuServer;
c8301d63 12use PVE::OpenVZ; # dependeny problem?!
6b9f68a2 13use File::Basename;
5e1267a5
DM		 14use File::Path;
15use IO::File;
ecbea048 16use Net::IP;
06320eb0 17use PVE::Tools qw(run_command lock_file);
ecbea048 18
5e1267a5 19use Data::Dumper;
b6360c3f 20
c8301d63
DM		 21my $nodename = PVE::INotify::nodename();
22
06320eb0 23my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
6b9f68a2 24my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
06320eb0 25
2d404ffc
DM		 26my $default_log_level = 'info';
27
28my $log_level_hash = {
29 debug => 7,
30 info => 6,
31 notice => 5,
32 warning => 4,
33 err => 3,
34 crit => 2,
35 alert => 1,
36 emerg => 0,
37};
38
857f62c8 39# imported/converted from: /usr/share/shorewall/macro.*
961b4928 40my $pve_fw_macros = {
857f62c8
DM		 41 'Amanda' => [
42 { action => 'PARAM', proto => 'udp', dport => '10080' },
43 { action => 'PARAM', proto => 'tcp', dport => '10080' },
44 ],
45 'Auth' => [
46 { action => 'PARAM', proto => 'tcp', dport => '113' },
47 ],
48 'BGP' => [
49 { action => 'PARAM', proto => 'tcp', dport => '179' },
50 ],
51 'BitTorrent' => [
961b4928 52 { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
857f62c8
DM		 53 { action => 'PARAM', proto => 'udp', dport => '6881' },
54 ],
55 'BitTorrent32' => [
56 { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
57 { action => 'PARAM', proto => 'udp', dport => '6881' },
58 ],
59 'CVS' => [
60 { action => 'PARAM', proto => 'tcp', dport => '2401' },
61 ],
62 'Citrix' => [
63 { action => 'PARAM', proto => 'tcp', dport => '1494' },
64 { action => 'PARAM', proto => 'udp', dport => '1604' },
65 { action => 'PARAM', proto => 'tcp', dport => '2598' },
66 ],
67 'DAAP' => [
68 { action => 'PARAM', proto => 'tcp', dport => '3689' },
69 { action => 'PARAM', proto => 'udp', dport => '3689' },
70 ],
71 'DCC' => [
72 { action => 'PARAM', proto => 'tcp', dport => '6277' },
73 ],
74 'DHCPfwd' => [
75 { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
76 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' },
77 ],
78 'DNS' => [
79 { action => 'PARAM', proto => 'udp', dport => '53' },
80 { action => 'PARAM', proto => 'tcp', dport => '53' },
81 ],
82 'Distcc' => [
83 { action => 'PARAM', proto => 'tcp', dport => '3632' },
84 ],
85 'Edonkey' => [
86 { action => 'PARAM', proto => 'tcp', dport => '4662' },
87 { action => 'PARAM', proto => 'udp', dport => '4665' },
961b4928 88 ],
857f62c8
DM		 89 'FTP' => [
90 { action => 'PARAM', proto => 'tcp', dport => '21' },
91 ],
92 'Finger' => [
93 { action => 'PARAM', proto => 'tcp', dport => '79' },
94 ],
95 'GNUnet' => [
96 { action => 'PARAM', proto => 'tcp', dport => '2086' },
97 { action => 'PARAM', proto => 'udp', dport => '2086' },
98 { action => 'PARAM', proto => 'tcp', dport => '1080' },
99 { action => 'PARAM', proto => 'udp', dport => '1080' },
100 ],
101 'GRE' => [
102 { action => 'PARAM', proto => '47' },
103 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
104 ],
105 'Git' => [
106 { action => 'PARAM', proto => 'tcp', dport => '9418' },
107 ],
108 'Gnutella' => [
109 { action => 'PARAM', proto => 'tcp', dport => '6346' },
110 { action => 'PARAM', proto => 'udp', dport => '6346' },
111 ],
112 'HKP' => [
113 { action => 'PARAM', proto => 'tcp', dport => '11371' },
114 ],
115 'HTTP' => [
961b4928
DM		 116 { action => 'PARAM', proto => 'tcp', dport => '80' },
117 ],
857f62c8
DM		 118 'HTTPS' => [
119 { action => 'PARAM', proto => 'tcp', dport => '443' },
120 ],
121 'ICPV2' => [
122 { action => 'PARAM', proto => 'udp', dport => '3130' },
123 ],
124 'ICQ' => [
125 { action => 'PARAM', proto => 'tcp', dport => '5190' },
126 ],
127 'IMAP' => [
128 { action => 'PARAM', proto => 'tcp', dport => '143' },
129 ],
130 'IMAPS' => [
131 { action => 'PARAM', proto => 'tcp', dport => '993' },
132 ],
133 'IPIP' => [
134 { action => 'PARAM', proto => '94' },
135 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' },
136 ],
137 'IPP' => [
138 { action => 'PARAM', proto => 'tcp', dport => '631' },
139 ],
140 'IPPbrd' => [
141 { action => 'PARAM', proto => 'udp', dport => '631' },
142 ],
143 'IPPserver' => [
144 { action => 'PARAM', source => 'SOURCE', dest => 'DEST', proto => 'tcp', dport => '631' },
145 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '631' },
146 ],
147 'IPsec' => [
148 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
149 { action => 'PARAM', proto => '50' },
150 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
151 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
152 ],
153 'IPsecah' => [
154 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
155 { action => 'PARAM', proto => '51' },
156 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
157 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' },
158 ],
159 'IPsecnat' => [
160 { action => 'PARAM', proto => 'udp', dport => '500' },
161 { action => 'PARAM', proto => 'udp', dport => '4500' },
162 { action => 'PARAM', proto => '50' },
163 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' },
164 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' },
165 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
166 ],
167 'IRC' => [
168 { action => 'PARAM', proto => 'tcp', dport => '6667' },
169 ],
170 'JabberPlain' => [
171 { action => 'PARAM', proto => 'tcp', dport => '5222' },
172 ],
173 'JabberSecure' => [
174 { action => 'PARAM', proto => 'tcp', dport => '5223' },
175 ],
176 'Jabberd' => [
177 { action => 'PARAM', proto => 'tcp', dport => '5269' },
178 ],
179 'Jetdirect' => [
180 { action => 'PARAM', proto => 'tcp', dport => '9100' },
181 ],
182 'L2TP' => [
183 { action => 'PARAM', proto => 'udp', dport => '1701' },
184 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' },
185 ],
186 'LDAP' => [
187 { action => 'PARAM', proto => 'tcp', dport => '389' },
188 ],
189 'LDAPS' => [
190 { action => 'PARAM', proto => 'tcp', dport => '636' },
191 ],
192 'MSNP' => [
193 { action => 'PARAM', proto => 'tcp', dport => '1863' },
194 ],
195 'MSSQL' => [
196 { action => 'PARAM', proto => 'tcp', dport => '1433' },
197 ],
198 'Mail' => [
199 { action => 'PARAM', proto => 'tcp', dport => '25' },
200 { action => 'PARAM', proto => 'tcp', dport => '465' },
201 { action => 'PARAM', proto => 'tcp', dport => '587' },
202 ],
203 'Munin' => [
204 { action => 'PARAM', proto => 'tcp', dport => '4949' },
205 ],
206 'MySQL' => [
207 { action => 'PARAM', proto => 'tcp', dport => '3306' },
208 ],
209 'NNTP' => [
210 { action => 'PARAM', proto => 'tcp', dport => '119' },
211 ],
212 'NNTPS' => [
213 { action => 'PARAM', proto => 'tcp', dport => '563' },
214 ],
215 'NTP' => [
216 { action => 'PARAM', proto => 'udp', dport => '123' },
217 ],
218 'NTPbi' => [
219 { action => 'PARAM', proto => 'udp', dport => '123' },
220 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' },
221 ],
222 'NTPbrd' => [
223 { action => 'PARAM', proto => 'udp', dport => '123' },
224 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '123' },
225 ],
226 'OSPF' => [
227 { action => 'PARAM', proto => '89' },
228 ],
229 'OpenVPN' => [
230 { action => 'PARAM', proto => 'udp', dport => '1194' },
231 ],
232 'PCA' => [
233 { action => 'PARAM', proto => 'udp', dport => '5632' },
234 { action => 'PARAM', proto => 'tcp', dport => '5631' },
235 ],
236 'POP3' => [
237 { action => 'PARAM', proto => 'tcp', dport => '110' },
238 ],
239 'POP3S' => [
240 { action => 'PARAM', proto => 'tcp', dport => '995' },
241 ],
242 'PPtP' => [
243 { action => 'PARAM', proto => '47' },
244 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
245 { action => 'PARAM', proto => 'tcp', dport => '1723' },
246 ],
247 'Ping' => [
269d4f13 248 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
857f62c8
DM		 249 ],
250 'PostgreSQL' => [
251 { action => 'PARAM', proto => 'tcp', dport => '5432' },
252 ],
253 'Printer' => [
254 { action => 'PARAM', proto => 'tcp', dport => '515' },
255 ],
256 'RDP' => [
257 { action => 'PARAM', proto => 'tcp', dport => '3389' },
258 ],
259 'RIPbi' => [
260 { action => 'PARAM', proto => 'udp', dport => '520' },
261 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' },
262 ],
263 'RNDC' => [
264 { action => 'PARAM', proto => 'tcp', dport => '953' },
265 ],
266 'Razor' => [
267 { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
268 ],
269 'Rdate' => [
270 { action => 'PARAM', proto => 'tcp', dport => '37' },
271 ],
272 'Rsync' => [
273 { action => 'PARAM', proto => 'tcp', dport => '873' },
274 ],
275 'SANE' => [
276 { action => 'PARAM', proto => 'tcp', dport => '6566' },
277 ],
278 'SMB' => [
279 { action => 'PARAM', proto => 'udp', dport => '135,445' },
280 { action => 'PARAM', proto => 'udp', dport => '137:139' },
281 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
282 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
283 ],
284 'SMBBI' => [
285 { action => 'PARAM', proto => 'udp', dport => '135,445' },
286 { action => 'PARAM', proto => 'udp', dport => '137:139' },
287 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
288 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
289 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' },
290 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' },
291 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' },
292 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' },
293 ],
294 'SMBswat' => [
295 { action => 'PARAM', proto => 'tcp', dport => '901' },
296 ],
297 'SMTP' => [
298 { action => 'PARAM', proto => 'tcp', dport => '25' },
299 ],
300 'SMTPS' => [
301 { action => 'PARAM', proto => 'tcp', dport => '465' },
302 ],
303 'SNMP' => [
304 { action => 'PARAM', proto => 'udp', dport => '161:162' },
305 { action => 'PARAM', proto => 'tcp', dport => '161' },
306 ],
307 'SPAMD' => [
308 { action => 'PARAM', proto => 'tcp', dport => '783' },
309 ],
310 'SSH' => [
311 { action => 'PARAM', proto => 'tcp', dport => '22' },
312 ],
313 'SVN' => [
314 { action => 'PARAM', proto => 'tcp', dport => '3690' },
315 ],
316 'SixXS' => [
317 { action => 'PARAM', proto => 'tcp', dport => '3874' },
318 { action => 'PARAM', proto => 'udp', dport => '3740' },
319 { action => 'PARAM', proto => '41' },
320 { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
321 ],
322 'Squid' => [
323 { action => 'PARAM', proto => 'tcp', dport => '3128' },
324 ],
325 'Submission' => [
326 { action => 'PARAM', proto => 'tcp', dport => '587' },
327 ],
328 'Syslog' => [
329 { action => 'PARAM', proto => 'udp', dport => '514' },
330 { action => 'PARAM', proto => 'tcp', dport => '514' },
331 ],
332 'TFTP' => [
333 { action => 'PARAM', proto => 'udp', dport => '69' },
334 ],
335 'Telnet' => [
336 { action => 'PARAM', proto => 'tcp', dport => '23' },
337 ],
338 'Telnets' => [
339 { action => 'PARAM', proto => 'tcp', dport => '992' },
340 ],
341 'Time' => [
342 { action => 'PARAM', proto => 'tcp', dport => '37' },
343 ],
344 'Trcrt' => [
345 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
269d4f13 346 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
857f62c8
DM		 347 ],
348 'VNC' => [
349 { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
350 ],
351 'VNCL' => [
352 { action => 'PARAM', proto => 'tcp', dport => '5500' },
353 ],
354 'Web' => [
355 { action => 'PARAM', proto => 'tcp', dport => '80' },
961b4928
DM		 356 { action => 'PARAM', proto => 'tcp', dport => '443' },
357 ],
857f62c8
DM		 358 'Webcache' => [
359 { action => 'PARAM', proto => 'tcp', dport => '8080' },
360 ],
361 'Webmin' => [
362 { action => 'PARAM', proto => 'tcp', dport => '10000' },
363 ],
364 'Whois' => [
365 { action => 'PARAM', proto => 'tcp', dport => '43' },
366 ],
961b4928
DM		 367};
368
369my $pve_fw_parsed_macros;
370my $pve_fw_preferred_macro_names = {};
3a616aa0 371
d8f2505e
DM		 372my $pve_std_chains = {
373 'PVEFW-SET-ACCEPT-MARK' => [
374 "-j MARK --set-mark 1",
375 ],
79929d9c
DM		 376 'PVEFW-DropBroadcast' => [
377 # same as shorewall 'Broadcast'
378 # simply DROP BROADCAST/MULTICAST/ANYCAST
379 # we can use this to reduce logging
380 { action => 'DROP', dsttype => 'BROADCAST' },
381 { action => 'DROP', dsttype => 'MULTICAST' },
382 { action => 'DROP', dsttype => 'ANYCAST' },
383 { action => 'DROP', dest => '224.0.0.0/4' },
384 ],
385 'PVEFW-reject' => [
386 # same as shorewall 'reject'
387 { action => 'DROP', dsttype => 'BROADCAST' },
388 { action => 'DROP', source => '224.0.0.0/4' },
389 { action => 'DROP', proto => 'icmp' },
390 "-p tcp -j REJECT --reject-with tcp-reset",
391 "-p udp -j REJECT --reject-with icmp-port-unreachable",
392 "-p icmp -j REJECT --reject-with icmp-host-unreachable",
393 "-j REJECT --reject-with icmp-host-prohibited",
394 ],
395 'PVEFW-Drop' => [
396 # same as shorewall 'Drop', which is equal to DROP,
397 # but REJECT/DROP some packages to reduce logging,
398 # and ACCEPT critical ICMP types
399 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
400 # we are not interested in BROADCAST/MULTICAST/ANYCAST
401 { action => 'PVEFW-DropBroadcast' },
402 # ACCEPT critical ICMP types
403 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
404 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
405 # Drop packets with INVALID state
406 "-m conntrack --ctstate INVALID -j DROP",
407 # Drop Microsoft SMB noise
408 { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
409 { action => 'DROP', proto => 'udp', dport => '137:139'},
410 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
411 { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
412 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
413 # Drop new/NotSyn traffic so that it doesn't get logged
414 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
415 # Drop DNS replies
416 { action => 'DROP', proto => 'udp', sport => 53 },
417 ],
418 'PVEFW-Reject' => [
419 # same as shorewall 'Reject', which is equal to Reject,
420 # but REJECT/DROP some packages to reduce logging,
421 # and ACCEPT critical ICMP types
422 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
423 # we are not interested in BROADCAST/MULTICAST/ANYCAST
424 { action => 'PVEFW-DropBroadcast' },
425 # ACCEPT critical ICMP types
426 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
427 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
428 # Drop packets with INVALID state
429 "-m conntrack --ctstate INVALID -j DROP",
430 # Drop Microsoft SMB noise
431 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
432 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
433 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
434 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
435 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
436 # Drop new/NotSyn traffic so that it doesn't get logged
437 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
438 # Drop DNS replies
439 { action => 'DROP', proto => 'udp', sport => 53 },
440 ],
d86659ef
DM		 441 'PVEFW-tcpflags' => [
442 # same as shorewall tcpflags action.
443 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
444 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
445 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
446 "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
447 "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
448 "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
449 ],
bee633ab
DM		 450 'PVEFW-smurfs' => [
451 # same as shorewall smurfs action
452 # Filter packets for smurfs (packets with a broadcast address as the source).
453 "-s 0.0.0.0/32 -j RETURN",
454 "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
455 "-s 224.0.0.0/4 -g PVEFW-smurflog",
456 ],
d8f2505e
DM		 457};
458
4b586518
DM		 459# iptables -p icmp -h
460my $icmp_type_names = {
461 any => 1,
462 'echo-reply' => 1,
463 'destination-unreachable' => 1,
464 'network-unreachable' => 1,
465 'host-unreachable' => 1,
466 'protocol-unreachable' => 1,
467 'port-unreachable' => 1,
468 'fragmentation-needed' => 1,
469 'source-route-failed' => 1,
470 'network-unknown' => 1,
471 'host-unknown' => 1,
472 'network-prohibited' => 1,
473 'host-prohibited' => 1,
474 'TOS-network-unreachable' => 1,
475 'TOS-host-unreachable' => 1,
476 'communication-prohibited' => 1,
477 'host-precedence-violation' => 1,
478 'precedence-cutoff' => 1,
479 'source-quench' => 1,
480 'redirect' => 1,
481 'network-redirect' => 1,
482 'host-redirect' => 1,
483 'TOS-network-redirect' => 1,
484 'TOS-host-redirect' => 1,
485 'echo-request' => 1,
486 'router-advertisement' => 1,
487 'router-solicitation' => 1,
488 'time-exceeded' => 1,
489 'ttl-zero-during-transit' => 1,
490 'ttl-zero-during-reassembly' => 1,
491 'parameter-problem' => 1,
492 'ip-header-bad' => 1,
493 'required-option-missing' => 1,
494 'timestamp-request' => 1,
495 'timestamp-reply' => 1,
496 'address-mask-request' => 1,
497 'address-mask-reply' => 1,
498};
499
a332200b 500sub get_firewall_macros {
9aab3127 501
961b4928 502 return $pve_fw_parsed_macros if $pve_fw_parsed_macros;
6158271d 503
961b4928 504 $pve_fw_parsed_macros = {};
9aab3127 505
961b4928
DM		 506 foreach my $k (keys %$pve_fw_macros) {
507 my $name = lc($k);
a332200b 508
961b4928
DM		 509 my $macro = $pve_fw_macros->{$k};
510 $pve_fw_preferred_macro_names->{$name} = $k;
511 $pve_fw_parsed_macros->{$name} = $macro;
512 }
a332200b 513
961b4928 514 return $pve_fw_parsed_macros;
9aab3127
DM		 515}
516
fcba0beb
DM		 517my $etc_services;
518
519sub get_etc_services {
520
521 return $etc_services if $etc_services;
522
523 my $filename = "/etc/services";
524
525 my $fh = IO::File->new($filename, O_RDONLY);
526 if (!$fh) {
527 warn "unable to read '$filename' - $!\n";
528 return {};
529 }
530
531 my $services = {};
532
533 while (my $line = <$fh>) {
534 chomp ($line);
535 next if $line =~m/^#/;
536 next if ($line =~m/^\s*$/);
537
538 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
539 $services->{byid}->{$2}->{name} = $1;
35b66e9d 540 $services->{byid}->{$2}->{port} = $2;
fcba0beb
DM		 541 $services->{byid}->{$2}->{$3} = 1;
542 $services->{byname}->{$1} = $services->{byid}->{$2};
543 }
544 }
545
546 close($fh);
547
6158271d
DM		 548 $etc_services = $services;
549
3a616aa0 550
fcba0beb
DM		 551 return $etc_services;
552}
553
554my $etc_protocols;
555
556sub get_etc_protocols {
557 return $etc_protocols if $etc_protocols;
558
559 my $filename = "/etc/protocols";
560
561 my $fh = IO::File->new($filename, O_RDONLY);
562 if (!$fh) {
563 warn "unable to read '$filename' - $!\n";
564 return {};
565 }
566
567 my $protocols = {};
568
569 while (my $line = <$fh>) {
570 chomp ($line);
571 next if $line =~m/^#/;
572 next if ($line =~m/^\s*$/);
573
574 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
575 $protocols->{byid}->{$2}->{name} = $1;
576 $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
577 }
578 }
579
580 close($fh);
581
582 $etc_protocols = $protocols;
583
584 return $etc_protocols;
585}
586
ecbea048
DM		 587sub parse_address_list {
588 my ($str) = @_;
589
d6de1dc2 590 my $nbaor = 0;
ecbea048
DM		 591 foreach my $aor (split(/,/, $str)) {
592 if (!Net::IP->new($aor)) {
593 my $err = Net::IP::Error();
594 die "invalid IP address: $err\n";
d6de1dc2
AD		 595 }else{
596 $nbaor++;
ecbea048
DM		 597 }
598 }
d6de1dc2 599 return $nbaor;
ecbea048 600}
dddd9413 601
fcba0beb
DM		 602sub parse_port_name_number_or_range {
603 my ($str) = @_;
604
605 my $services = PVE::Firewall::get_etc_services();
4cdbb3b7 606 my $nbports = 0;
fcba0beb 607 foreach my $item (split(/,/, $str)) {
4cdbb3b7 608 my $portlist = "";
35b66e9d 609 my $oldpon = undef;
4b586518 610 $nbports++;
fcba0beb 611 foreach my $pon (split(':', $item, 2)) {
35b66e9d 612 $pon = $services->{byname}->{$pon}->{port} if $services->{byname}->{$pon}->{port};
4cdbb3b7 613 if ($pon =~ m/^\d+$/){
857f62c8 614 die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535;
35b66e9d
AD		 615 die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon);
616 $oldpon = $pon;
4cdbb3b7
AD		 617 }else{
618 die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon};
619 }
fcba0beb
DM		 620 }
621 }
622
4cdbb3b7 623 return ($nbports);
fcba0beb
DM		 624}
625
780bcc0f
DM		 626my $bridge_firewall_enabled = 0;
627
628sub enable_bridge_firewall {
629
630 return if $bridge_firewall_enabled; # only once
631
5f0a912c
DM		 632 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
633 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
780bcc0f 634
6a8a75db
DM		 635 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
636 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
637
780bcc0f
DM		 638 $bridge_firewall_enabled = 1;
639}
640
8cebfa6f 641my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
dddd9413 642
3a616aa0
AD		 643sub iptables {
644 my ($cmd) = @_;
645
646 run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {});
647}
648
b16e818e
DM		 649sub iptables_restore_cmdlist {
650 my ($cmdlist) = @_;
3a616aa0 651
3fa83edf 652 run_command("/sbin/iptables-restore -n", input => $cmdlist);
3a616aa0
AD		 653}
654
de2a57cd
DM		 655sub iptables_get_chains {
656
657 my $res = {};
658
659 # check what chains we want to track
660 my $is_pvefw_chain = sub {
661 my $name = shift;
662
dec84fcd
DM		 663 return 1 if $name =~ m/^PVEFW-\S+$/;
664
de2a57cd 665 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
954f24b1
DM		 666
667 return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
668
9e15114a
DM		 669 return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
670
5927497d 671 return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT)$/;
f50656c2 672 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
de2a57cd
DM		 673
674 return undef;
675 };
676
677 my $table = '';
678
de2a57cd
DM		 679 my $parser = sub {
680 my $line = shift;
681
682 return if $line =~ m/^#/;
683 return if $line =~ m/^\s*$/;
684
685 if ($line =~ m/^\*(\S+)$/) {
686 $table = $1;
687 return;
688 }
689
690 return if $table ne 'filter';
691
692 if ($line =~ m/^:(\S+)\s/) {
693 my $chain = $1;
694 return if !&$is_pvefw_chain($chain);
3fa83edf 695 $res->{$chain} = "unknown";
09d5f68e 696 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
3fa83edf 697 my ($chain, $sig) = ($1, $2);
de2a57cd 698 return if !&$is_pvefw_chain($chain);
3fa83edf 699 $res->{$chain} = $sig;
de2a57cd
DM		 700 } else {
701 # simply ignore the rest
702 return;
703 }
704 };
705
706 run_command("/sbin/iptables-save", outfunc => $parser);
707
de2a57cd
DM		 708 return $res;
709}
710
3a616aa0
AD		 711sub iptables_chain_exist {
712 my ($chain) = @_;
713
714 eval{
715 iptables("-n --list $chain");
716 };
717 return undef if $@;
718
719 return 1;
720}
721
722sub iptables_rule_exist {
723 my ($rule) = @_;
724
725 eval{
726 iptables("-C $rule");
727 };
728 return undef if $@;
729
730 return 1;
731}
732
3fa83edf 733sub ruleset_generate_rule {
2f906466 734 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
3a616aa0 735
11bac5c2
DM		 736 return if $rule->{disable};
737
41524a58 738 my @cmd = ();
3a616aa0 739
41524a58
DM		 740 push @cmd, "-m iprange --src-range" if $rule->{nbsource} && $rule->{nbsource} > 1;
741 push @cmd, "-s $rule->{source}" if $rule->{source};
742 push @cmd, "-m iprange --dst-range" if $rule->{nbdest} && $rule->{nbdest} > 1;
743 push @cmd, "-d $rule->{dest}" if $rule->{dest};
4b586518 744
181390b0 745 if ($rule->{proto}) {
41524a58 746 push @cmd, "-p $rule->{proto}";
e3a1d391 747
181390b0
DM		 748 my $multiport = 0;
749 $multiport++ if $rule->{nbdport} && ($rule->{nbdport} > 1);
750 $multiport++ if $rule->{nbsport} && ($rule->{nbsport} > 1);
e3a1d391 751
41524a58 752 push @cmd, "--match multiport" if $multiport;
4b586518 753
181390b0
DM		 754 die "multiport: option '--sports' cannot be used together with '--dports'\n"
755 if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
756
757 if ($rule->{dport}) {
758 if ($rule->{proto} && $rule->{proto} eq 'icmp') {
759 # Note: we use dport to store --icmp-type
760 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
41524a58 761 push @cmd, "-m icmp --icmp-type $rule->{dport}";
181390b0
DM		 762 } else {
763 if ($rule->{nbdport} && $rule->{nbdport} > 1) {
764 if ($multiport == 2) {
41524a58 765 push @cmd, "--ports $rule->{dport}";
181390b0 766 } else {
41524a58 767 push @cmd, "--dports $rule->{dport}";
181390b0 768 }
e3a1d391 769 } else {
41524a58 770 push @cmd, "--dport $rule->{dport}";
e3a1d391 771 }
4b586518
DM		 772 }
773 }
4b586518 774
181390b0
DM		 775 if ($rule->{sport}) {
776 if ($rule->{nbsport} && $rule->{nbsport} > 1) {
41524a58 777 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
181390b0 778 } else {
41524a58 779 push @cmd, "--sport $rule->{sport}";
181390b0 780 }
4b586518 781 }
181390b0
DM		 782 } elsif ($rule->{dport} || $rule->{sport}) {
783 warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
784 warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
4b586518
DM		 785 }
786
41524a58 787 push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
4e6112f9
DM		 788
789 if (my $action = $rule->{action}) {
2f906466 790 $action = $actions->{$action} if defined($actions->{$action});
4e6112f9 791 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
41524a58 792 push @cmd, $goto ? "-g $action" : "-j $action";
181390b0 793 }
3a616aa0 794
41524a58
DM		 795 if (scalar(@cmd)) {
796 my $cmdstr = join(' ', @cmd);
797 ruleset_addrule($ruleset, $chain, $cmdstr);
798 }
3fa83edf
DM		 799}
800
801sub ruleset_create_chain {
802 my ($ruleset, $chain) = @_;
3a616aa0 803
d050c724
DM		 804 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
805
3fa83edf
DM		 806 die "chain '$chain' already exists\n" if $ruleset->{$chain};
807
808 $ruleset->{$chain} = [];
3a616aa0
AD		 809}
810
3fa83edf
DM		 811sub ruleset_chain_exist {
812 my ($ruleset, $chain) = @_;
3a616aa0 813
3fa83edf
DM		 814 return $ruleset->{$chain} ? 1 : undef;
815}
3a616aa0 816
3fa83edf
DM		 817sub ruleset_addrule {
818 my ($ruleset, $chain, $rule) = @_;
3a616aa0 819
3fa83edf 820 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 821
3fa83edf
DM		 822 push @{$ruleset->{$chain}}, "-A $chain $rule";
823}
3a616aa0 824
3fa83edf
DM		 825sub ruleset_insertrule {
826 my ($ruleset, $chain, $rule) = @_;
3a616aa0 827
3fa83edf 828 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 829
3fa83edf
DM		 830 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
831}
3a616aa0 832
3fa83edf 833sub generate_bridge_chains {
2f3d8d76
DM		 834 my ($ruleset, $hostfw_conf, $bridge) = @_;
835
6d2ab017 836 my $options = $hostfw_conf->{options} || {};
2f3d8d76
DM		 837
838 # fixme: what log level should we use here?
839 my $loglevel = get_option_log_level($options, "log_level_out");
3a616aa0 840
5927497d
DM		 841 if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
842 ruleset_create_chain($ruleset, "$bridge-FW");
843 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
844 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
2f3d8d76
DM		 845 # disable interbridge routing
846 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j PVEFW-Drop");
847 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j PVEFW-Drop");
848 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j LOG --log-prefix \"PVEFW-FORWARD-dropped \" --log-level $loglevel");
849 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j LOG --log-prefix \"PVEFW-FORWARD-dropped \" --log-level $loglevel");
850 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j DROP");
851 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j DROP");
3fa83edf 852 }
3a616aa0 853
3fa83edf
DM		 854 if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
855 ruleset_create_chain($ruleset, "$bridge-OUT");
5927497d 856 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-in -j $bridge-OUT");
12cc9946 857 ruleset_addrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-bridged --physdev-is-in -j $bridge-OUT");
9fcad984
AD		 858 }
859
860 if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
861 ruleset_create_chain($ruleset, "$bridge-IN");
5927497d 862 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j $bridge-IN");
fdb0bf20 863 ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
7323008d
DM		 864 # accept traffic to unmanaged bridge ports
865 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j ACCEPT ");
3fa83edf
DM		 866 }
867}
3a616aa0 868
ead850e8
DM		 869sub ruleset_add_chain_policy {
870 my ($ruleset, $chain, $policy, $loglevel, $accept_action) = @_;
871
872 if ($policy eq 'ACCEPT') {
873
874 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
875 { ACCEPT => $accept_action});
876
877 } elsif ($policy eq 'DROP') {
878
879 ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
880
881 ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"$chain-dropped: \" --log-level $loglevel")
882 if defined($loglevel);
883
884 ruleset_addrule($ruleset, $chain, "-j DROP");
885 } elsif ($policy eq 'REJECT') {
886 ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
887
888 ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"$chain-reject: \" --log-level $loglevel")
889 if defined($loglevel);
890
891 ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
892 } else {
893 # should not happen
894 die "internal error: unknown policy '$policy'";
895 }
896}
897
9e15114a
DM		 898sub ruleset_create_vm_chain {
899 my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
3a616aa0 900
9e15114a 901 ruleset_create_chain($ruleset, $chain);
3a616aa0 902
bee633ab 903 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
9e15114a 904 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
bee633ab
DM		 905 }
906
ce15d90b 907 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
9e15114a 908 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 67:68 -j ACCEPT");
ce15d90b
DM		 909 }
910
bee633ab 911 if ($options->{tcpflags}) {
9e15114a 912 ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
bee633ab
DM		 913 }
914
9e15114a
DM		 915 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
916 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
3a616aa0 917
b21aca2c
DM		 918 if ($direction eq 'OUT') {
919 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
9e15114a 920 ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
b21aca2c 921 }
9e15114a 922 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
c29f55c9 923 }
9e15114a
DM		 924}
925
926sub ruleset_generate_vm_rules {
927 my ($ruleset, $rules, $groups_conf, $chain, $netid, $direction) = @_;
928
929 my $lc_direction = lc($direction);
c29f55c9 930
92e976b3
DM		 931 foreach my $rule (@$rules) {
932 next if $rule->{iface} && $rule->{iface} ne $netid;
933 next if $rule->{disable};
934 if ($rule->{type} eq 'group') {
935 my $group_chain = "GROUP-$rule->{action}-$direction";
936 if(!ruleset_chain_exist($ruleset, $group_chain)){
937 generate_group_rules($ruleset, $groups_conf, $rule->{action});
938 }
9e15114a
DM		 939 ruleset_addrule($ruleset, $chain, "-j $group_chain");
940 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j RETURN")
92e976b3
DM		 941 if $direction eq 'OUT';
942 } else {
943 next if $rule->{type} ne $lc_direction;
944 if ($direction eq 'OUT') {
9e15114a 945 ruleset_generate_rule($ruleset, $chain, $rule,
92e976b3 946 { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
4e6112f9 947 } else {
9e15114a 948 ruleset_generate_rule($ruleset, $chain, $rule, { REJECT => "PVEFW-reject" });
3a616aa0 949 }
4e6112f9 950 }
3a616aa0 951 }
9e15114a
DM		 952}
953
954sub generate_venet_rules_direction {
955 my ($ruleset, $groups_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
956
5176619e 957 parse_address_list($ip); # make sure we have a valid $ip list
9e15114a
DM		 958
959 my $lc_direction = lc($direction);
960
961 my $rules = $vmfw_conf->{rules};
962
963 my $options = $vmfw_conf->{options};
964 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
965
966 my $chain = "venet0-$vmid-$direction";
967
968 ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
969
970 ruleset_generate_vm_rules($ruleset, $rules, $groups_conf, $chain, 'venet', $direction);
971
972 # implement policy
973 my $policy;
974
975 if ($direction eq 'OUT') {
976 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
977 } else {
978 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
979 }
980
981 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : "ACCEPT";
982 ruleset_add_chain_policy($ruleset, $chain, $policy, $loglevel, $accept_action);
983
984
985}
986
987sub generate_tap_rules_direction {
988 my ($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, $direction) = @_;
989
990 my $lc_direction = lc($direction);
991
992 my $rules = $vmfw_conf->{rules};
993
994 my $options = $vmfw_conf->{options};
995 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
996
997 my $tapchain = "$iface-$direction";
998
999 ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1000
1001 ruleset_generate_vm_rules($ruleset, $rules, $groups_conf, $tapchain, $netid, $direction);
3a616aa0 1002
ccae0b50
DM		 1003 # implement policy
1004 my $policy;
1005
1006 if ($direction eq 'OUT') {
72f63fde 1007 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
ccae0b50 1008 } else {
72f63fde 1009 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
ccae0b50
DM		 1010 }
1011
ead850e8
DM		 1012 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : "ACCEPT";
1013 ruleset_add_chain_policy($ruleset, $tapchain, $policy, $loglevel, $accept_action);
3a616aa0 1014
3fa83edf
DM		 1015 # plug the tap chain to bridge chain
1016 my $physdevdirection = $direction eq 'IN' ? "out" : "in";
1017 my $rule = "-m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain";
1018 ruleset_insertrule($ruleset, "$bridge-$direction", $rule);
3a616aa0
AD		 1019}
1020
d18c1e2b 1021sub enable_host_firewall {
92e976b3 1022 my ($ruleset, $hostfw_conf, $groups_conf) = @_;
0bd5f137 1023
51bae274 1024 # fixme: allow security groups
0bd5f137 1025
92e976b3
DM		 1026 my $options = $hostfw_conf->{options};
1027 my $rules = $hostfw_conf->{rules};
178a63be 1028
3fa83edf 1029 # host inbound firewall
dec84fcd
DM		 1030 my $chain = "PVEFW-HOST-IN";
1031 ruleset_create_chain($ruleset, $chain);
0bd5f137 1032
178a63be
DM		 1033 my $loglevel = get_option_log_level($options, "log_level_in");
1034
7fab95bc
DM		 1035 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1036 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
dec84fcd
DM		 1037 ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1038 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
7fab95bc 1039 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
dec84fcd 1040 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 1041
23e888f8
DM		 1042 # we use RETURN because we need to check also tap rules
1043 my $accept_action = 'RETURN';
1044
92e976b3
DM		 1045 foreach my $rule (@$rules) {
1046 next if $rule->{type} ne 'in';
23e888f8 1047 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
0bd5f137
AD		 1048 }
1049
23e888f8 1050 # implement input policy
72f63fde 1051 my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
23e888f8 1052 ruleset_add_chain_policy($ruleset, $chain, $policy, $loglevel, $accept_action);
0bd5f137 1053
3fa83edf 1054 # host outbound firewall
aadd745e 1055 $chain = "PVEFW-HOST-OUT";
dec84fcd
DM		 1056 ruleset_create_chain($ruleset, $chain);
1057
178a63be
DM		 1058 $loglevel = get_option_log_level($options, "log_level_out");
1059
7fab95bc
DM		 1060 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1061 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
dec84fcd
DM		 1062 ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1063 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
7fab95bc 1064 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
dec84fcd 1065 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 1066
23e888f8
DM		 1067 # we use RETURN because we may want to check other thigs later
1068 $accept_action = 'RETURN';
1069
92e976b3
DM		 1070 foreach my $rule (@$rules) {
1071 next if $rule->{type} ne 'out';
23e888f8 1072 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
0bd5f137
AD		 1073 }
1074
23e888f8 1075 # implement output policy
72f63fde 1076 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
23e888f8 1077 ruleset_add_chain_policy($ruleset, $chain, $policy, $loglevel, $accept_action);
6158271d 1078
dec84fcd
DM		 1079 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1080 ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
9d31b418
AD		 1081}
1082
1083sub generate_group_rules {
92e976b3 1084 my ($ruleset, $groups_conf, $group) = @_;
9d31b418 1085
92e976b3 1086 die "no such security group '$group'\n" if !$groups_conf->{$group};
9d31b418 1087
92e976b3 1088 my $rules = $groups_conf->{$group}->{rules};
6158271d 1089
3fa83edf 1090 my $chain = "GROUP-${group}-IN";
9d31b418 1091
3fa83edf 1092 ruleset_create_chain($ruleset, $chain);
9d31b418 1093
92e976b3
DM		 1094 foreach my $rule (@$rules) {
1095 next if $rule->{type} ne 'in';
1096 ruleset_generate_rule($ruleset, $chain, $rule, { REJECT => "PVEFW-reject" });
9d31b418
AD		 1097 }
1098
3fa83edf 1099 $chain = "GROUP-${group}-OUT";
9d31b418 1100
3fa83edf 1101 ruleset_create_chain($ruleset, $chain);
4e6112f9 1102 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
9d31b418 1103
92e976b3
DM		 1104 foreach my $rule (@$rules) {
1105 next if $rule->{type} ne 'out';
1106 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1107 # check also other tap rules later
1108 ruleset_generate_rule($ruleset, $chain, $rule,
1109 { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
9d31b418 1110 }
9d31b418
AD		 1111}
1112
51bae274
DM		 1113my $MAX_NETS = 32;
1114my $valid_netdev_names = {};
1115for (my $i = 0; $i < $MAX_NETS; $i++) {
1116 $valid_netdev_names->{"net$i"} = 1;
1117}
5e1267a5 1118
51bae274
DM		 1119sub parse_fw_rule {
1120 my ($line, $need_iface, $allow_groups) = @_;
5e1267a5 1121
a332200b 1122 my $macros = get_firewall_macros();
fcba0beb 1123 my $protocols = get_etc_protocols();
51bae274 1124
92e976b3 1125 my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
51bae274 1126
11bac5c2
DM		 1127 # we can add single line comments to the end of the rule
1128 my $comment = $1 if $line =~ s/#\s*(.*?)\s*$//;
1129
1130 # we can disable a rule when prefixed with '|'
1131 my $disable = 1 if $line =~ s/^\|//;
51bae274
DM		 1132
1133 my @data = split(/\s+/, $line);
92e976b3 1134 my $expected_elements = $need_iface ? 8 : 7;
51bae274
DM		 1135
1136 die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1137
1138 if ($need_iface) {
92e976b3 1139 ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
51bae274 1140 } else {
92e976b3 1141 ($type, $action, $source, $dest, $proto, $dport, $sport) = @data;
51bae274
DM		 1142 }
1143
92e976b3 1144 die "incomplete rule\n" if ! ($type && $action);
51bae274 1145
961b4928
DM		 1146 my $macro;
1147 my $macro_name;
1148
92e976b3
DM		 1149 $type = lc($type);
1150
1151 if ($type eq 'in' || $type eq 'out') {
1152 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1153 # OK
1154 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1155 ($macro_name, $action) = ($1, $2);
1156 my $lc_macro_name = lc($macro_name);
1157 my $preferred_name = $pve_fw_preferred_macro_names->{$lc_macro_name};
1158 $macro_name = $preferred_name if $preferred_name;
1159 $macro = $macros->{$lc_macro_name};
1160 die "unknown macro '$macro_name'\n" if !$macro;
1161 } else {
1162 die "unknown action '$action'\n";
1163 }
1164 } elsif ($type eq 'group') {
1165 die "wrong number of rule elements\n" if scalar(@data) != 3;
1166 die "groups disabled\n" if !$allow_groups;
1167
1168 die "invalid characters in group name\n" if $action !~ m/^[A-Za-z0-9_\-]+$/;
51bae274 1169 } else {
92e976b3 1170 die "unknown rule type '$type'\n";
51bae274
DM		 1171 }
1172
1173 if ($need_iface) {
1174 $iface = undef if $iface && $iface eq '-';
51bae274
DM		 1175 }
1176
1177 $proto = undef if $proto && $proto eq '-';
6158271d 1178 die "unknown protokol '$proto'\n" if $proto &&
51bae274
DM		 1179 !(defined($protocols->{byname}->{$proto}) ||
1180 defined($protocols->{byid}->{$proto}));
1181
1182 $source = undef if $source && $source eq '-';
1183 $dest = undef if $dest && $dest eq '-';
1184
1185 $dport = undef if $dport && $dport eq '-';
1186 $sport = undef if $sport && $sport eq '-';
1187
51bae274
DM		 1188 my $nbsource = undef;
1189 my $nbdest = undef;
1190
1191 $nbsource = parse_address_list($source) if $source;
1192 $nbdest = parse_address_list($dest) if $dest;
6158271d 1193
961b4928 1194 my $rules = [];
51bae274 1195
961b4928 1196 my $param = {
92e976b3 1197 type => $type,
11bac5c2
DM		 1198 disable => $disable,
1199 comment => $comment,
51bae274 1200 action => $action,
51bae274
DM		 1201 iface => $iface,
1202 source => $source,
1203 dest => $dest,
1204 nbsource => $nbsource,
1205 nbdest => $nbdest,
1206 proto => $proto,
1207 dport => $dport,
1208 sport => $sport,
51bae274 1209 };
961b4928
DM		 1210
1211 if ($macro) {
1212 foreach my $templ (@$macro) {
1213 my $rule = {};
faf7be7e 1214 my $param_used = {};
961b4928
DM		 1215 foreach my $k (keys %$templ) {
1216 my $v = $templ->{$k};
857f62c8
DM		 1217 if ($v eq 'PARAM') {
1218 $v = $param->{$k};
faf7be7e 1219 $param_used->{$k} = 1;
857f62c8
DM		 1220 } elsif ($v eq 'DEST') {
1221 $v = $param->{dest};
faf7be7e 1222 $param_used->{dest} = 1;
857f62c8
DM		 1223 } elsif ($v eq 'SOURCE') {
1224 $v = $param->{source};
faf7be7e 1225 $param_used->{source} = 1;
857f62c8
DM		 1226 }
1227
961b4928
DM		 1228 die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
1229 $rule->{$k} = $v;
1230 }
faf7be7e
DM		 1231 foreach my $k (keys %$param) {
1232 next if !defined($param->{$k});
1233 next if $param_used->{$k};
1234 if (defined($rule->{$k})) {
1235 die "parameter '$k' already define in macro (value = '$rule->{$k}')\n"
1236 if $rule->{$k} ne $param->{$k};
1237 } else {
1238 $rule->{$k} = $param->{$k};
1239 }
1240 }
961b4928
DM		 1241 push @$rules, $rule;
1242 }
1243 } else {
1244 push @$rules, $param;
1245 }
1246
1247 foreach my $rule (@$rules) {
6158271d 1248 $rule->{nbdport} = parse_port_name_number_or_range($rule->{dport})
961b4928 1249 if defined($rule->{dport});
6158271d 1250 $rule->{nbsport} = parse_port_name_number_or_range($rule->{sport})
961b4928
DM		 1251 if defined($rule->{sport});
1252 }
1253
1254 return $rules;
51bae274
DM		 1255}
1256
2d404ffc 1257sub parse_vmfw_option {
85c6eaed
DM		 1258 my ($line) = @_;
1259
1260 my ($opt, $value);
1261
178a63be
DM		 1262 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1263
ce15d90b 1264 if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
9c6b6efd
DM		 1265 $opt = lc($1);
1266 $value = int($2);
178a63be
DM		 1267 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1268 $opt = lc($1);
1269 $value = $2 ? lc($3) : '';
72f63fde 1270 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
85c6eaed
DM		 1271 $opt = lc($1);
1272 $value = uc($3);
9c6b6efd 1273 } else {
85c6eaed
DM		 1274 chomp $line;
1275 die "can't parse option '$line'\n"
1276 }
1277
1278 return ($opt, $value);
1279}
1280
2d404ffc
DM		 1281sub parse_hostfw_option {
1282 my ($line) = @_;
1283
1284 my ($opt, $value);
1285
1286 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1287
1288 if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
1289 $opt = lc($1);
1290 $value = int($2);
178a63be 1291 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2d404ffc
DM		 1292 $opt = lc($1);
1293 $value = $2 ? lc($3) : '';
72f63fde 1294 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2d404ffc
DM		 1295 $opt = lc($1);
1296 $value = uc($3);
490cdead
DM		 1297 } elsif ($line =~ m/^(nf_conntrack_max):\s*(\d+)\s*$/i) {
1298 $opt = lc($1);
1299 $value = int($2);
2d404ffc
DM		 1300 } else {
1301 chomp $line;
1302 die "can't parse option '$line'\n"
1303 }
1304
1305 return ($opt, $value);
1306}
1307
51bae274
DM		 1308sub parse_vm_fw_rules {
1309 my ($filename, $fh) = @_;
1310
92e976b3 1311 my $res = { rules => [], options => {}};
51bae274
DM		 1312
1313 my $section;
1314
5e1267a5
DM		 1315 while (defined(my $line = <$fh>)) {
1316 next if $line =~ m/^#/;
1317 next if $line =~ m/^\s*$/;
1318
961b4928
DM		 1319 my $linenr = $fh->input_line_number();
1320 my $prefix = "$filename (line $linenr)";
1321
85c6eaed 1322 if ($line =~ m/^\[(\S+)\]\s*$/i) {
5e1267a5 1323 $section = lc($1);
85c6eaed 1324 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
5e1267a5
DM		 1325 next;
1326 }
51bae274 1327 if (!$section) {
961b4928 1328 warn "$prefix: skip line - no section";
5e1267a5
DM		 1329 next;
1330 }
1331
85c6eaed
DM		 1332 next if !$res->{$section}; # skip undefined section
1333
1334 if ($section eq 'options') {
6158271d 1335 eval {
2d404ffc 1336 my ($opt, $value) = parse_vmfw_option($line);
85c6eaed
DM		 1337 $res->{options}->{$opt} = $value;
1338 };
1339 warn "$prefix: $@" if $@;
1340 next;
1341 }
1342
961b4928
DM		 1343 my $rules;
1344 eval { $rules = parse_fw_rule($line, 1, 1); };
51bae274 1345 if (my $err = $@) {
961b4928 1346 warn "$prefix: $err";
5e1267a5
DM		 1347 next;
1348 }
1349
961b4928 1350 push @{$res->{$section}}, @$rules;
51bae274
DM		 1351 }
1352
1353 return $res;
1354}
1355
1356sub parse_host_fw_rules {
1357 my ($filename, $fh) = @_;
1358
92e976b3 1359 my $res = { rules => [], options => {}};
51bae274
DM		 1360
1361 my $section;
1362
1363 while (defined(my $line = <$fh>)) {
1364 next if $line =~ m/^#/;
1365 next if $line =~ m/^\s*$/;
1366
961b4928
DM		 1367 my $linenr = $fh->input_line_number();
1368 my $prefix = "$filename (line $linenr)";
1369
2d404ffc 1370 if ($line =~ m/^\[(\S+)\]\s*$/i) {
51bae274 1371 $section = lc($1);
2d404ffc 1372 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
5e1267a5
DM		 1373 next;
1374 }
51bae274 1375 if (!$section) {
961b4928 1376 warn "$prefix: skip line - no section";
5e1267a5
DM		 1377 next;
1378 }
1379
2d404ffc
DM		 1380 next if !$res->{$section}; # skip undefined section
1381
1382 if ($section eq 'options') {
1383 eval {
2d404ffc
DM		 1384 my ($opt, $value) = parse_hostfw_option($line);
1385 $res->{options}->{$opt} = $value;
1386 };
1387 warn "$prefix: $@" if $@;
1388 next;
1389 }
1390
961b4928
DM		 1391 my $rules;
1392 eval { $rules = parse_fw_rule($line, 1, 1); };
ecbea048 1393 if (my $err = $@) {
961b4928 1394 warn "$prefix: $err";
ecbea048 1395 next;
ecbea048
DM		 1396 }
1397
961b4928 1398 push @{$res->{$section}}, @$rules;
51bae274 1399 }
ecbea048 1400
51bae274
DM		 1401 return $res;
1402}
4cdbb3b7 1403
51bae274
DM		 1404sub parse_group_fw_rules {
1405 my ($filename, $fh) = @_;
5e1267a5 1406
51bae274
DM		 1407 my $section;
1408 my $group;
1409
92e976b3 1410 my $res = { rules => [] };
6158271d 1411
51bae274
DM		 1412 while (defined(my $line = <$fh>)) {
1413 next if $line =~ m/^#/;
1414 next if $line =~ m/^\s*$/;
1415
961b4928
DM		 1416 my $linenr = $fh->input_line_number();
1417 my $prefix = "$filename (line $linenr)";
1418
92e976b3
DM		 1419 if ($line =~ m/^\[group\s+(\S+)\]\s*$/i) {
1420 $section = 'rules';
1421 $group = lc($1);
51bae274
DM		 1422 next;
1423 }
1424 if (!$section || !$group) {
961b4928 1425 warn "$prefix: skip line - no section";
51bae274
DM		 1426 next;
1427 }
1428
961b4928
DM		 1429 my $rules;
1430 eval { $rules = parse_fw_rule($line, 0, 0); };
51bae274 1431 if (my $err = $@) {
961b4928 1432 warn "$prefix: $err";
51bae274
DM		 1433 next;
1434 }
1435
961b4928 1436 push @{$res->{$group}->{$section}}, @$rules;
5e1267a5
DM		 1437 }
1438
1439 return $res;
1440}
1441
06320eb0
DM		 1442sub run_locked {
1443 my ($code, @param) = @_;
1444
1445 my $timeout = 10;
1446
1447 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
1448
1449 die $@ if $@;
1450
1451 return $res;
1452}
1453
5e1267a5
DM		 1454sub read_local_vm_config {
1455
1456 my $openvz = {};
5e1267a5
DM		 1457 my $qemu = {};
1458
c8301d63 1459 my $vmdata = { openvz => $openvz, qemu => $qemu };
5e1267a5 1460
c8301d63
DM		 1461 my $vmlist = PVE::Cluster::get_vmlist();
1462 return $vmdata if !$vmlist || !$vmlist->{ids};
1463 my $ids = $vmlist->{ids};
1464
1465 foreach my $vmid (keys %$ids) {
1466 next if !$vmid; # skip VE0
1467 my $d = $ids->{$vmid};
1468 next if !$d->{node} || $d->{node} ne $nodename;
1469 next if !$d->{type};
1470 if ($d->{type} eq 'openvz') {
1471 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
1472 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1473 $openvz->{$vmid} = $conf;
1474 }
1475 } elsif ($d->{type} eq 'qemu') {
1476 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
1477 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1478 $qemu->{$vmid} = $conf;
1479 }
5e1267a5
DM		 1480 }
1481 }
c8301d63 1482
5e1267a5
DM		 1483 return $vmdata;
1484};
1485
6fc63ffd 1486sub read_vm_firewall_configs {
5e1267a5 1487 my ($vmdata) = @_;
6fc63ffd 1488 my $vmfw_configs = {};
c8301d63 1489
5e1267a5
DM		 1490 foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
1491 my $filename = "/etc/pve/firewall/$vmid.fw";
1492 my $fh = IO::File->new($filename, O_RDONLY);
1493 next if !$fh;
1494
6fc63ffd 1495 $vmfw_configs->{$vmid} = parse_vm_fw_rules($filename, $fh);
5e1267a5
DM		 1496 }
1497
6fc63ffd 1498 return $vmfw_configs;
5e1267a5
DM		 1499}
1500
2d404ffc
DM		 1501sub get_option_log_level {
1502 my ($options, $k) = @_;
1503
1504 my $v = $options->{$k};
178a63be 1505 $v = $default_log_level if !defined($v);
2d404ffc
DM		 1506
1507 return undef if $v eq '' || $v eq 'nolog';
1508
1509 $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
1510
1511 return $v if ($v >= 0) && ($v <= 7);
1512
1513 warn "unknown log level ($k = '$v')\n";
1514
1515 return undef;
1516}
1517
d8f2505e 1518sub generate_std_chains {
2d404ffc
DM		 1519 my ($ruleset, $options) = @_;
1520
1521 my $loglevel = get_option_log_level($options, 'smurf_log_level');
1522
1523 # same as shorewall smurflog.
1524 if (defined($loglevel)) {
1525 $pve_std_chains-> {'PVEFW-smurflog'} = [
2f3d8d76 1526 "-j LOG --log-prefix \"smurfs-dropped: \" --log-level $loglevel",
2d404ffc
DM		 1527 "-j DROP",
1528 ];
1529 } else {
1530 $pve_std_chains-> {'PVEFW-smurflog'} = [ "-j DROP" ];
1531 }
1532
1533 # same as shorewall logflags action.
1534 $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
1535 if (defined($loglevel)) {
1536 $pve_std_chains-> {'PVEFW-logflags'} = [
2f3d8d76 1537 "-j LOG --log-prefix \"logflags-dropped: \" --log-level $loglevel --log-ip-options",
2d404ffc
DM		 1538 "-j DROP",
1539 ];
1540 } else {
1541 $pve_std_chains-> {'PVEFW-logflags'} = [ "-j DROP" ];
1542 }
d8f2505e
DM		 1543
1544 foreach my $chain (keys %$pve_std_chains) {
1545 ruleset_create_chain($ruleset, $chain);
1546 foreach my $rule (@{$pve_std_chains->{$chain}}) {
1547 if (ref($rule)) {
1548 ruleset_generate_rule($ruleset, $chain, $rule);
1549 } else {
1550 ruleset_addrule($ruleset, $chain, $rule);
1551 }
1552 }
1553 }
1554}
1555
6b9f68a2
DM		 1556sub save_pvefw_status {
1557 my ($status) = @_;
1558
1559 die "unknown status '$status' - internal error"
1560 if $status !~ m/^(stopped|active)$/;
1561
1562 mkdir dirname($pve_fw_status_filename);
1563 PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
1564}
1565
1566sub read_pvefw_status {
1567
1568 my $status = 'unknown';
1569
1570 return 'stopped' if ! -f $pve_fw_status_filename;
1571
1572 eval {
1573 $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
1574 };
1575 warn $@ if $@;
1576
1577 return $status;
1578}
1579
5e1267a5 1580sub compile {
5e1267a5 1581 my $vmdata = read_local_vm_config();
6fc63ffd 1582 my $vmfw_configs = read_vm_firewall_configs($vmdata);
6158271d 1583
92e976b3 1584 my $groups_conf = {};
51bae274
DM		 1585 my $filename = "/etc/pve/firewall/groups.fw";
1586 if (my $fh = IO::File->new($filename, O_RDONLY)) {
92e976b3 1587 $groups_conf = parse_group_fw_rules($filename, $fh);
51bae274 1588 }
5e1267a5 1589
3fa83edf
DM		 1590 my $ruleset = {};
1591
dec84fcd
DM		 1592 ruleset_create_chain($ruleset, "PVEFW-INPUT");
1593 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
5b1df9a0 1594
fadb13dd 1595 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3fa83edf 1596
92e976b3 1597 my $hostfw_options = {};
6d2ab017 1598 my $hostfw_conf = {};
4e6112f9 1599
51bae274
DM		 1600 $filename = "/etc/pve/local/host.fw";
1601 if (my $fh = IO::File->new($filename, O_RDONLY)) {
92e976b3
DM		 1602 $hostfw_conf = parse_host_fw_rules($filename, $fh);
1603 $hostfw_options = $hostfw_conf->{options};
2d404ffc 1604 }
fadb13dd 1605
92e976b3 1606 generate_std_chains($ruleset, $hostfw_options);
fadb13dd 1607
6d2ab017 1608 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2d404ffc 1609
d18c1e2b 1610 enable_host_firewall($ruleset, $hostfw_conf, $groups_conf) if $hostfw_enable;
3fa83edf 1611
6158271d 1612 # generate firewall rules for QEMU VMs
3fa83edf
DM		 1613 foreach my $vmid (keys %{$vmdata->{qemu}}) {
1614 my $conf = $vmdata->{qemu}->{$vmid};
6fc63ffd 1615 my $vmfw_conf = $vmfw_configs->{$vmid};
fa9c4a6f
DM		 1616 next if !$vmfw_conf;
1617 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
3fa83edf
DM		 1618
1619 foreach my $netid (keys %$conf) {
1620 next if $netid !~ m/^net(\d+)$/;
1621 my $net = PVE::QemuServer::parse_net($conf->{$netid});
1622 next if !$net;
1623 my $iface = "tap${vmid}i$1";
5e1267a5 1624
3fa83edf
DM		 1625 my $bridge = $net->{bridge};
1626 next if !$bridge; # fixme: ?
1627
1628 $bridge .= "v$net->{tag}" if $net->{tag};
1629
2f3d8d76 1630 generate_bridge_chains($ruleset, $hostfw_conf, $bridge);
3fa83edf 1631
c29f55c9 1632 my $macaddr = $net->{macaddr};
92e976b3
DM		 1633 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'IN');
1634 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'OUT');
3fa83edf
DM		 1635 }
1636 }
c8301d63
DM		 1637
1638 # generate firewall rules for OpenVZ containers
1639 foreach my $vmid (keys %{$vmdata->{openvz}}) {
1640 my $conf = $vmdata->{openvz}->{$vmid};
1641
1642 my $vmfw_conf = $vmfw_configs->{$vmid};
1643 next if !$vmfw_conf;
1644 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
1645
1646 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
1647 my $ip = $conf->{ip_address}->{value};
9e15114a
DM		 1648 generate_venet_rules_direction($ruleset, $groups_conf, $vmfw_conf, $vmid, $ip, 'IN');
1649 generate_venet_rules_direction($ruleset, $groups_conf, $vmfw_conf, $vmid, $ip, 'OUT');
c8301d63
DM		 1650 }
1651
1652 if ($conf->{netif} && $conf->{netif}->{value}) {
1653 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
c8301d63
DM		 1654 foreach my $netid (keys %$netif) {
1655 my $d = $netif->{$netid};
1656 my $bridge = $d->{bridge};
1657 if (!$bridge) {
1658 warn "no bridge device for CT $vmid iface '$netid'\n";
1659 next; # fixme?
1660 }
1661 my $macaddr = $d->{host_mac};
1662 my $iface = $d->{host_ifname};
1663 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'IN');
1664 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'OUT');
1665 }
1666 }
1667 }
c0413e35 1668
98aa911e
DM		 1669 # fixme: this is an optimization? if so, we should also drop INVALID packages?
1670 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1671
490cdead 1672 return wantarray ? ($ruleset, $hostfw_conf) : $ruleset;
3fa83edf
DM		 1673}
1674
1675sub get_ruleset_status {
1676 my ($ruleset, $verbose) = @_;
1677
1678 my $active_chains = iptables_get_chains();
1679
1680 my $statushash = {};
1681
1682 foreach my $chain (sort keys %$ruleset) {
09d5f68e 1683 my $digest = Digest::SHA->new('sha1');
3fa83edf
DM		 1684 foreach my $cmd (@{$ruleset->{$chain}}) {
1685 $digest->add("$cmd\n");
1686 }
1687 my $sig = $digest->b64digest;
1688 $statushash->{$chain}->{sig} = $sig;
1689
1690 my $oldsig = $active_chains->{$chain};
1691 if (!defined($oldsig)) {
1692 $statushash->{$chain}->{action} = 'create';
1693 } else {
1694 if ($oldsig eq $sig) {
1695 $statushash->{$chain}->{action} = 'exists';
1696 } else {
1697 $statushash->{$chain}->{action} = 'update';
1698 }
1699 }
1700 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
1701 foreach my $cmd (@{$ruleset->{$chain}}) {
1702 print "\t$cmd\n" if $verbose;
1703 }
1704 }
1705
1706 foreach my $chain (sort keys %$active_chains) {
1707 if (!defined($ruleset->{$chain})) {
1708 my $sig = $active_chains->{$chain};
1709 $statushash->{$chain}->{action} = 'delete';
1710 $statushash->{$chain}->{sig} = $sig;
1711 print "delete $chain ($sig)\n" if $verbose;
1712 }
6158271d 1713 }
3fa83edf
DM		 1714
1715 return $statushash;
1716}
1717
1718sub print_ruleset {
1719 my ($ruleset) = @_;
1720
1721 get_ruleset_status($ruleset, 1);
1722}
1723
1724sub print_sig_rule {
1725 my ($chain, $sig) = @_;
1726
09d5f68e
DM		 1727 # We just use this to store a SHA1 checksum used to detect changes
1728 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
b6360c3f
DM		 1729}
1730
6b9f68a2 1731sub get_rulset_cmdlist {
a84f4d96 1732 my ($ruleset, $verbose) = @_;
3fa83edf 1733
3fa83edf
DM		 1734 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
1735
1736 my $statushash = get_ruleset_status($ruleset, $verbose);
1737
1738 # create missing chains first
1739 foreach my $chain (sort keys %$ruleset) {
1740 my $stat = $statushash->{$chain};
1741 die "internal error" if !$stat;
1742 next if $stat->{action} ne 'create';
886aba9c 1743
3fa83edf
DM		 1744 $cmdlist .= ":$chain - [0:0]\n";
1745 }
1746
dec84fcd 1747 my $rule = "INPUT -j PVEFW-INPUT";
3fa83edf
DM		 1748 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1749 $cmdlist .= "-A $rule\n";
1750 }
dec84fcd 1751 $rule = "OUTPUT -j PVEFW-OUTPUT";
3fa83edf
DM		 1752 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1753 $cmdlist .= "-A $rule\n";
1754 }
1755
dec84fcd 1756 $rule = "FORWARD -j PVEFW-FORWARD";
3fa83edf
DM		 1757 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1758 $cmdlist .= "-A $rule\n";
1759 }
1760
1761 foreach my $chain (sort keys %$ruleset) {
1762 my $stat = $statushash->{$chain};
1763 die "internal error" if !$stat;
1764
1765 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
1766 $cmdlist .= "-F $chain\n";
1767 foreach my $cmd (@{$ruleset->{$chain}}) {
1768 $cmdlist .= "$cmd\n";
1769 }
1770 $cmdlist .= print_sig_rule($chain, $stat->{sig});
1771 } elsif ($stat->{action} eq 'delete') {
f5d28682 1772 die "internal error"; # this should not happen
3fa83edf
DM		 1773 } elsif ($stat->{action} eq 'exists') {
1774 # do nothing
1775 } else {
1776 die "internal error - unknown status '$stat->{action}'";
1777 }
1778 }
1779
f5d28682
DM		 1780 foreach my $chain (keys %$statushash) {
1781 next if $statushash->{$chain}->{action} ne 'delete';
1782 $cmdlist .= "-F $chain\n";
1783 }
1784 foreach my $chain (keys %$statushash) {
1785 next if $statushash->{$chain}->{action} ne 'delete';
fadb13dd
DM		 1786 next if $chain eq 'PVEFW-INPUT';
1787 next if $chain eq 'PVEFW-OUTPUT';
1788 next if $chain eq 'PVEFW-FORWARD';
f5d28682
DM		 1789 $cmdlist .= "-X $chain\n";
1790 }
1791
3fa83edf
DM		 1792 $cmdlist .= "COMMIT\n";
1793
6b9f68a2
DM		 1794 return $cmdlist;
1795}
1796
1797sub apply_ruleset {
1798 my ($ruleset, $verbose) = @_;
1799
1800 enable_bridge_firewall();
1801
1802 my $cmdlist = get_rulset_cmdlist($ruleset, $verbose);
1803
3fa83edf
DM		 1804 print $cmdlist if $verbose;
1805
1806 iptables_restore_cmdlist($cmdlist);
1807
6158271d 1808 # test: re-read status and check if everything is up to date
6b9f68a2 1809 my $statushash = get_ruleset_status($ruleset);
3fa83edf
DM		 1810
1811 my $errors;
1812 foreach my $chain (sort keys %$ruleset) {
1813 my $stat = $statushash->{$chain};
1814 if ($stat->{action} ne 'exists') {
1815 warn "unable to update chain '$chain'\n";
1816 $errors = 1;
1817 }
1818 }
b6360c3f 1819
3fa83edf 1820 die "unable to apply firewall changes\n" if $errors;
b6360c3f
DM		 1821}
1822
490cdead
DM		 1823sub update_nf_conntrack_max {
1824 my ($hostfw_conf) = @_;
1825
1826 my $max = 65536; # reasonable default
1827
1828 my $options = $hostfw_conf->{options} || {};
1829
1830 if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
1831 $max = $options->{nf_conntrack_max};
1832 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
1833 }
1834
1835 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
1836 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
1837
1838 my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
1839
1840 if ($current != $max) {
1841 my $hashsize = int($max/4);
1842 PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
1843 PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
1844 }
1845}
1846
6b9f68a2
DM		 1847sub update {
1848 my ($start, $verbose) = @_;
1849
1850 my $code = sub {
1851 my $status = read_pvefw_status();
1852
490cdead
DM		 1853 my ($ruleset, $hostfw_conf) = PVE::Firewall::compile();
1854
1855 update_nf_conntrack_max($hostfw_conf);
6b9f68a2
DM		 1856
1857 if ($start || $status eq 'active') {
1858
1859 save_pvefw_status('active') if ($status ne 'active');
1860
1861 PVE::Firewall::apply_ruleset($ruleset, $verbose);
1862 } else {
1863 print "Firewall not active (status = $status)\n" if $verbose;
1864 }
1865 };
1866
1867 run_locked($code);
1868}
1869
1870
b6360c3f 18711;
Firewall test scripts