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[pve-firewall.git] / src / PVE / Firewall.pm
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b6360c3f
DM		 1package PVE::Firewall;
2
3use warnings;
4use strict;
5use Data::Dumper;
09d5f68e 6use Digest::SHA;
f789653a 7use PVE::Tools;
b6360c3f 8use PVE::QemuServer;
6b9f68a2 9use File::Basename;
5e1267a5
DM		 10use File::Path;
11use IO::File;
ecbea048 12use Net::IP;
06320eb0 13use PVE::Tools qw(run_command lock_file);
ecbea048 14
5e1267a5 15use Data::Dumper;
b6360c3f 16
06320eb0 17my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
6b9f68a2 18my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
06320eb0 19
2d404ffc
DM		 20my $default_log_level = 'info';
21
22my $log_level_hash = {
23 debug => 7,
24 info => 6,
25 notice => 5,
26 warning => 4,
27 err => 3,
28 crit => 2,
29 alert => 1,
30 emerg => 0,
31};
32
857f62c8 33# imported/converted from: /usr/share/shorewall/macro.*
961b4928 34my $pve_fw_macros = {
857f62c8
DM		 35 'Amanda' => [
36 { action => 'PARAM', proto => 'udp', dport => '10080' },
37 { action => 'PARAM', proto => 'tcp', dport => '10080' },
38 ],
39 'Auth' => [
40 { action => 'PARAM', proto => 'tcp', dport => '113' },
41 ],
42 'BGP' => [
43 { action => 'PARAM', proto => 'tcp', dport => '179' },
44 ],
45 'BitTorrent' => [
961b4928 46 { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
857f62c8
DM		 47 { action => 'PARAM', proto => 'udp', dport => '6881' },
48 ],
49 'BitTorrent32' => [
50 { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
51 { action => 'PARAM', proto => 'udp', dport => '6881' },
52 ],
53 'CVS' => [
54 { action => 'PARAM', proto => 'tcp', dport => '2401' },
55 ],
56 'Citrix' => [
57 { action => 'PARAM', proto => 'tcp', dport => '1494' },
58 { action => 'PARAM', proto => 'udp', dport => '1604' },
59 { action => 'PARAM', proto => 'tcp', dport => '2598' },
60 ],
61 'DAAP' => [
62 { action => 'PARAM', proto => 'tcp', dport => '3689' },
63 { action => 'PARAM', proto => 'udp', dport => '3689' },
64 ],
65 'DCC' => [
66 { action => 'PARAM', proto => 'tcp', dport => '6277' },
67 ],
68 'DHCPfwd' => [
69 { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
70 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' },
71 ],
72 'DNS' => [
73 { action => 'PARAM', proto => 'udp', dport => '53' },
74 { action => 'PARAM', proto => 'tcp', dport => '53' },
75 ],
76 'Distcc' => [
77 { action => 'PARAM', proto => 'tcp', dport => '3632' },
78 ],
79 'Edonkey' => [
80 { action => 'PARAM', proto => 'tcp', dport => '4662' },
81 { action => 'PARAM', proto => 'udp', dport => '4665' },
961b4928 82 ],
857f62c8
DM		 83 'FTP' => [
84 { action => 'PARAM', proto => 'tcp', dport => '21' },
85 ],
86 'Finger' => [
87 { action => 'PARAM', proto => 'tcp', dport => '79' },
88 ],
89 'GNUnet' => [
90 { action => 'PARAM', proto => 'tcp', dport => '2086' },
91 { action => 'PARAM', proto => 'udp', dport => '2086' },
92 { action => 'PARAM', proto => 'tcp', dport => '1080' },
93 { action => 'PARAM', proto => 'udp', dport => '1080' },
94 ],
95 'GRE' => [
96 { action => 'PARAM', proto => '47' },
97 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
98 ],
99 'Git' => [
100 { action => 'PARAM', proto => 'tcp', dport => '9418' },
101 ],
102 'Gnutella' => [
103 { action => 'PARAM', proto => 'tcp', dport => '6346' },
104 { action => 'PARAM', proto => 'udp', dport => '6346' },
105 ],
106 'HKP' => [
107 { action => 'PARAM', proto => 'tcp', dport => '11371' },
108 ],
109 'HTTP' => [
961b4928
DM		 110 { action => 'PARAM', proto => 'tcp', dport => '80' },
111 ],
857f62c8
DM		 112 'HTTPS' => [
113 { action => 'PARAM', proto => 'tcp', dport => '443' },
114 ],
115 'ICPV2' => [
116 { action => 'PARAM', proto => 'udp', dport => '3130' },
117 ],
118 'ICQ' => [
119 { action => 'PARAM', proto => 'tcp', dport => '5190' },
120 ],
121 'IMAP' => [
122 { action => 'PARAM', proto => 'tcp', dport => '143' },
123 ],
124 'IMAPS' => [
125 { action => 'PARAM', proto => 'tcp', dport => '993' },
126 ],
127 'IPIP' => [
128 { action => 'PARAM', proto => '94' },
129 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' },
130 ],
131 'IPP' => [
132 { action => 'PARAM', proto => 'tcp', dport => '631' },
133 ],
134 'IPPbrd' => [
135 { action => 'PARAM', proto => 'udp', dport => '631' },
136 ],
137 'IPPserver' => [
138 { action => 'PARAM', source => 'SOURCE', dest => 'DEST', proto => 'tcp', dport => '631' },
139 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '631' },
140 ],
141 'IPsec' => [
142 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
143 { action => 'PARAM', proto => '50' },
144 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
145 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
146 ],
147 'IPsecah' => [
148 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
149 { action => 'PARAM', proto => '51' },
150 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
151 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' },
152 ],
153 'IPsecnat' => [
154 { action => 'PARAM', proto => 'udp', dport => '500' },
155 { action => 'PARAM', proto => 'udp', dport => '4500' },
156 { action => 'PARAM', proto => '50' },
157 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' },
158 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' },
159 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
160 ],
161 'IRC' => [
162 { action => 'PARAM', proto => 'tcp', dport => '6667' },
163 ],
164 'JabberPlain' => [
165 { action => 'PARAM', proto => 'tcp', dport => '5222' },
166 ],
167 'JabberSecure' => [
168 { action => 'PARAM', proto => 'tcp', dport => '5223' },
169 ],
170 'Jabberd' => [
171 { action => 'PARAM', proto => 'tcp', dport => '5269' },
172 ],
173 'Jetdirect' => [
174 { action => 'PARAM', proto => 'tcp', dport => '9100' },
175 ],
176 'L2TP' => [
177 { action => 'PARAM', proto => 'udp', dport => '1701' },
178 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' },
179 ],
180 'LDAP' => [
181 { action => 'PARAM', proto => 'tcp', dport => '389' },
182 ],
183 'LDAPS' => [
184 { action => 'PARAM', proto => 'tcp', dport => '636' },
185 ],
186 'MSNP' => [
187 { action => 'PARAM', proto => 'tcp', dport => '1863' },
188 ],
189 'MSSQL' => [
190 { action => 'PARAM', proto => 'tcp', dport => '1433' },
191 ],
192 'Mail' => [
193 { action => 'PARAM', proto => 'tcp', dport => '25' },
194 { action => 'PARAM', proto => 'tcp', dport => '465' },
195 { action => 'PARAM', proto => 'tcp', dport => '587' },
196 ],
197 'Munin' => [
198 { action => 'PARAM', proto => 'tcp', dport => '4949' },
199 ],
200 'MySQL' => [
201 { action => 'PARAM', proto => 'tcp', dport => '3306' },
202 ],
203 'NNTP' => [
204 { action => 'PARAM', proto => 'tcp', dport => '119' },
205 ],
206 'NNTPS' => [
207 { action => 'PARAM', proto => 'tcp', dport => '563' },
208 ],
209 'NTP' => [
210 { action => 'PARAM', proto => 'udp', dport => '123' },
211 ],
212 'NTPbi' => [
213 { action => 'PARAM', proto => 'udp', dport => '123' },
214 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' },
215 ],
216 'NTPbrd' => [
217 { action => 'PARAM', proto => 'udp', dport => '123' },
218 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '123' },
219 ],
220 'OSPF' => [
221 { action => 'PARAM', proto => '89' },
222 ],
223 'OpenVPN' => [
224 { action => 'PARAM', proto => 'udp', dport => '1194' },
225 ],
226 'PCA' => [
227 { action => 'PARAM', proto => 'udp', dport => '5632' },
228 { action => 'PARAM', proto => 'tcp', dport => '5631' },
229 ],
230 'POP3' => [
231 { action => 'PARAM', proto => 'tcp', dport => '110' },
232 ],
233 'POP3S' => [
234 { action => 'PARAM', proto => 'tcp', dport => '995' },
235 ],
236 'PPtP' => [
237 { action => 'PARAM', proto => '47' },
238 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
239 { action => 'PARAM', proto => 'tcp', dport => '1723' },
240 ],
241 'Ping' => [
269d4f13 242 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
857f62c8
DM		 243 ],
244 'PostgreSQL' => [
245 { action => 'PARAM', proto => 'tcp', dport => '5432' },
246 ],
247 'Printer' => [
248 { action => 'PARAM', proto => 'tcp', dport => '515' },
249 ],
250 'RDP' => [
251 { action => 'PARAM', proto => 'tcp', dport => '3389' },
252 ],
253 'RIPbi' => [
254 { action => 'PARAM', proto => 'udp', dport => '520' },
255 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' },
256 ],
257 'RNDC' => [
258 { action => 'PARAM', proto => 'tcp', dport => '953' },
259 ],
260 'Razor' => [
261 { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
262 ],
263 'Rdate' => [
264 { action => 'PARAM', proto => 'tcp', dport => '37' },
265 ],
266 'Rsync' => [
267 { action => 'PARAM', proto => 'tcp', dport => '873' },
268 ],
269 'SANE' => [
270 { action => 'PARAM', proto => 'tcp', dport => '6566' },
271 ],
272 'SMB' => [
273 { action => 'PARAM', proto => 'udp', dport => '135,445' },
274 { action => 'PARAM', proto => 'udp', dport => '137:139' },
275 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
276 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
277 ],
278 'SMBBI' => [
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 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' },
284 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' },
285 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' },
286 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' },
287 ],
288 'SMBswat' => [
289 { action => 'PARAM', proto => 'tcp', dport => '901' },
290 ],
291 'SMTP' => [
292 { action => 'PARAM', proto => 'tcp', dport => '25' },
293 ],
294 'SMTPS' => [
295 { action => 'PARAM', proto => 'tcp', dport => '465' },
296 ],
297 'SNMP' => [
298 { action => 'PARAM', proto => 'udp', dport => '161:162' },
299 { action => 'PARAM', proto => 'tcp', dport => '161' },
300 ],
301 'SPAMD' => [
302 { action => 'PARAM', proto => 'tcp', dport => '783' },
303 ],
304 'SSH' => [
305 { action => 'PARAM', proto => 'tcp', dport => '22' },
306 ],
307 'SVN' => [
308 { action => 'PARAM', proto => 'tcp', dport => '3690' },
309 ],
310 'SixXS' => [
311 { action => 'PARAM', proto => 'tcp', dport => '3874' },
312 { action => 'PARAM', proto => 'udp', dport => '3740' },
313 { action => 'PARAM', proto => '41' },
314 { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
315 ],
316 'Squid' => [
317 { action => 'PARAM', proto => 'tcp', dport => '3128' },
318 ],
319 'Submission' => [
320 { action => 'PARAM', proto => 'tcp', dport => '587' },
321 ],
322 'Syslog' => [
323 { action => 'PARAM', proto => 'udp', dport => '514' },
324 { action => 'PARAM', proto => 'tcp', dport => '514' },
325 ],
326 'TFTP' => [
327 { action => 'PARAM', proto => 'udp', dport => '69' },
328 ],
329 'Telnet' => [
330 { action => 'PARAM', proto => 'tcp', dport => '23' },
331 ],
332 'Telnets' => [
333 { action => 'PARAM', proto => 'tcp', dport => '992' },
334 ],
335 'Time' => [
336 { action => 'PARAM', proto => 'tcp', dport => '37' },
337 ],
338 'Trcrt' => [
339 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
269d4f13 340 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
857f62c8
DM		 341 ],
342 'VNC' => [
343 { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
344 ],
345 'VNCL' => [
346 { action => 'PARAM', proto => 'tcp', dport => '5500' },
347 ],
348 'Web' => [
349 { action => 'PARAM', proto => 'tcp', dport => '80' },
961b4928
DM		 350 { action => 'PARAM', proto => 'tcp', dport => '443' },
351 ],
857f62c8
DM		 352 'Webcache' => [
353 { action => 'PARAM', proto => 'tcp', dport => '8080' },
354 ],
355 'Webmin' => [
356 { action => 'PARAM', proto => 'tcp', dport => '10000' },
357 ],
358 'Whois' => [
359 { action => 'PARAM', proto => 'tcp', dport => '43' },
360 ],
961b4928
DM		 361};
362
363my $pve_fw_parsed_macros;
364my $pve_fw_preferred_macro_names = {};
3a616aa0 365
d8f2505e
DM		 366my $pve_std_chains = {
367 'PVEFW-SET-ACCEPT-MARK' => [
368 "-j MARK --set-mark 1",
369 ],
79929d9c
DM		 370 'PVEFW-DropBroadcast' => [
371 # same as shorewall 'Broadcast'
372 # simply DROP BROADCAST/MULTICAST/ANYCAST
373 # we can use this to reduce logging
374 { action => 'DROP', dsttype => 'BROADCAST' },
375 { action => 'DROP', dsttype => 'MULTICAST' },
376 { action => 'DROP', dsttype => 'ANYCAST' },
377 { action => 'DROP', dest => '224.0.0.0/4' },
378 ],
379 'PVEFW-reject' => [
380 # same as shorewall 'reject'
381 { action => 'DROP', dsttype => 'BROADCAST' },
382 { action => 'DROP', source => '224.0.0.0/4' },
383 { action => 'DROP', proto => 'icmp' },
384 "-p tcp -j REJECT --reject-with tcp-reset",
385 "-p udp -j REJECT --reject-with icmp-port-unreachable",
386 "-p icmp -j REJECT --reject-with icmp-host-unreachable",
387 "-j REJECT --reject-with icmp-host-prohibited",
388 ],
389 'PVEFW-Drop' => [
390 # same as shorewall 'Drop', which is equal to DROP,
391 # but REJECT/DROP some packages to reduce logging,
392 # and ACCEPT critical ICMP types
393 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
394 # we are not interested in BROADCAST/MULTICAST/ANYCAST
395 { action => 'PVEFW-DropBroadcast' },
396 # ACCEPT critical ICMP types
397 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
398 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
399 # Drop packets with INVALID state
400 "-m conntrack --ctstate INVALID -j DROP",
401 # Drop Microsoft SMB noise
402 { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
403 { action => 'DROP', proto => 'udp', dport => '137:139'},
404 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
405 { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
406 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
407 # Drop new/NotSyn traffic so that it doesn't get logged
408 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
409 # Drop DNS replies
410 { action => 'DROP', proto => 'udp', sport => 53 },
411 ],
412 'PVEFW-Reject' => [
413 # same as shorewall 'Reject', which is equal to Reject,
414 # but REJECT/DROP some packages to reduce logging,
415 # and ACCEPT critical ICMP types
416 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
417 # we are not interested in BROADCAST/MULTICAST/ANYCAST
418 { action => 'PVEFW-DropBroadcast' },
419 # ACCEPT critical ICMP types
420 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
421 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
422 # Drop packets with INVALID state
423 "-m conntrack --ctstate INVALID -j DROP",
424 # Drop Microsoft SMB noise
425 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
426 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
427 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
428 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
429 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
430 # Drop new/NotSyn traffic so that it doesn't get logged
431 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
432 # Drop DNS replies
433 { action => 'DROP', proto => 'udp', sport => 53 },
434 ],
d86659ef
DM		 435 'PVEFW-tcpflags' => [
436 # same as shorewall tcpflags action.
437 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
438 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
439 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
440 "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
441 "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
442 "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
443 ],
bee633ab
DM		 444 'PVEFW-smurfs' => [
445 # same as shorewall smurfs action
446 # Filter packets for smurfs (packets with a broadcast address as the source).
447 "-s 0.0.0.0/32 -j RETURN",
448 "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
449 "-s 224.0.0.0/4 -g PVEFW-smurflog",
450 ],
d8f2505e
DM		 451};
452
4b586518
DM		 453# iptables -p icmp -h
454my $icmp_type_names = {
455 any => 1,
456 'echo-reply' => 1,
457 'destination-unreachable' => 1,
458 'network-unreachable' => 1,
459 'host-unreachable' => 1,
460 'protocol-unreachable' => 1,
461 'port-unreachable' => 1,
462 'fragmentation-needed' => 1,
463 'source-route-failed' => 1,
464 'network-unknown' => 1,
465 'host-unknown' => 1,
466 'network-prohibited' => 1,
467 'host-prohibited' => 1,
468 'TOS-network-unreachable' => 1,
469 'TOS-host-unreachable' => 1,
470 'communication-prohibited' => 1,
471 'host-precedence-violation' => 1,
472 'precedence-cutoff' => 1,
473 'source-quench' => 1,
474 'redirect' => 1,
475 'network-redirect' => 1,
476 'host-redirect' => 1,
477 'TOS-network-redirect' => 1,
478 'TOS-host-redirect' => 1,
479 'echo-request' => 1,
480 'router-advertisement' => 1,
481 'router-solicitation' => 1,
482 'time-exceeded' => 1,
483 'ttl-zero-during-transit' => 1,
484 'ttl-zero-during-reassembly' => 1,
485 'parameter-problem' => 1,
486 'ip-header-bad' => 1,
487 'required-option-missing' => 1,
488 'timestamp-request' => 1,
489 'timestamp-reply' => 1,
490 'address-mask-request' => 1,
491 'address-mask-reply' => 1,
492};
493
a332200b 494sub get_firewall_macros {
9aab3127 495
961b4928 496 return $pve_fw_parsed_macros if $pve_fw_parsed_macros;
6158271d 497
961b4928 498 $pve_fw_parsed_macros = {};
9aab3127 499
961b4928
DM		 500 foreach my $k (keys %$pve_fw_macros) {
501 my $name = lc($k);
a332200b 502
961b4928
DM		 503 my $macro = $pve_fw_macros->{$k};
504 $pve_fw_preferred_macro_names->{$name} = $k;
505 $pve_fw_parsed_macros->{$name} = $macro;
506 }
a332200b 507
961b4928 508 return $pve_fw_parsed_macros;
9aab3127
DM		 509}
510
fcba0beb
DM		 511my $etc_services;
512
513sub get_etc_services {
514
515 return $etc_services if $etc_services;
516
517 my $filename = "/etc/services";
518
519 my $fh = IO::File->new($filename, O_RDONLY);
520 if (!$fh) {
521 warn "unable to read '$filename' - $!\n";
522 return {};
523 }
524
525 my $services = {};
526
527 while (my $line = <$fh>) {
528 chomp ($line);
529 next if $line =~m/^#/;
530 next if ($line =~m/^\s*$/);
531
532 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
533 $services->{byid}->{$2}->{name} = $1;
35b66e9d 534 $services->{byid}->{$2}->{port} = $2;
fcba0beb
DM		 535 $services->{byid}->{$2}->{$3} = 1;
536 $services->{byname}->{$1} = $services->{byid}->{$2};
537 }
538 }
539
540 close($fh);
541
6158271d
DM		 542 $etc_services = $services;
543
3a616aa0 544
fcba0beb
DM		 545 return $etc_services;
546}
547
548my $etc_protocols;
549
550sub get_etc_protocols {
551 return $etc_protocols if $etc_protocols;
552
553 my $filename = "/etc/protocols";
554
555 my $fh = IO::File->new($filename, O_RDONLY);
556 if (!$fh) {
557 warn "unable to read '$filename' - $!\n";
558 return {};
559 }
560
561 my $protocols = {};
562
563 while (my $line = <$fh>) {
564 chomp ($line);
565 next if $line =~m/^#/;
566 next if ($line =~m/^\s*$/);
567
568 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
569 $protocols->{byid}->{$2}->{name} = $1;
570 $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
571 }
572 }
573
574 close($fh);
575
576 $etc_protocols = $protocols;
577
578 return $etc_protocols;
579}
580
ecbea048
DM		 581sub parse_address_list {
582 my ($str) = @_;
583
d6de1dc2 584 my $nbaor = 0;
ecbea048
DM		 585 foreach my $aor (split(/,/, $str)) {
586 if (!Net::IP->new($aor)) {
587 my $err = Net::IP::Error();
588 die "invalid IP address: $err\n";
d6de1dc2
AD		 589 }else{
590 $nbaor++;
ecbea048
DM		 591 }
592 }
d6de1dc2 593 return $nbaor;
ecbea048 594}
dddd9413 595
fcba0beb
DM		 596sub parse_port_name_number_or_range {
597 my ($str) = @_;
598
599 my $services = PVE::Firewall::get_etc_services();
4cdbb3b7 600 my $nbports = 0;
fcba0beb 601 foreach my $item (split(/,/, $str)) {
4cdbb3b7 602 my $portlist = "";
35b66e9d 603 my $oldpon = undef;
4b586518 604 $nbports++;
fcba0beb 605 foreach my $pon (split(':', $item, 2)) {
35b66e9d 606 $pon = $services->{byname}->{$pon}->{port} if $services->{byname}->{$pon}->{port};
4cdbb3b7 607 if ($pon =~ m/^\d+$/){
857f62c8 608 die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535;
35b66e9d
AD		 609 die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon);
610 $oldpon = $pon;
4cdbb3b7
AD		 611 }else{
612 die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon};
613 }
fcba0beb
DM		 614 }
615 }
616
4cdbb3b7 617 return ($nbports);
fcba0beb
DM		 618}
619
780bcc0f
DM		 620my $bridge_firewall_enabled = 0;
621
622sub enable_bridge_firewall {
623
624 return if $bridge_firewall_enabled; # only once
625
626 system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables");
627 system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-ip6tables");
628
629 $bridge_firewall_enabled = 1;
630}
631
8cebfa6f 632my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
dddd9413 633
3a616aa0
AD		 634sub iptables {
635 my ($cmd) = @_;
636
637 run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {});
638}
639
b16e818e
DM		 640sub iptables_restore_cmdlist {
641 my ($cmdlist) = @_;
3a616aa0 642
3fa83edf 643 run_command("/sbin/iptables-restore -n", input => $cmdlist);
3a616aa0
AD		 644}
645
de2a57cd
DM		 646sub iptables_get_chains {
647
648 my $res = {};
649
650 # check what chains we want to track
651 my $is_pvefw_chain = sub {
652 my $name = shift;
653
dec84fcd
DM		 654 return 1 if $name =~ m/^PVEFW-\S+$/;
655
de2a57cd 656 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
5927497d 657 return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT)$/;
f50656c2 658 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
de2a57cd
DM		 659
660 return undef;
661 };
662
663 my $table = '';
664
de2a57cd
DM		 665 my $parser = sub {
666 my $line = shift;
667
668 return if $line =~ m/^#/;
669 return if $line =~ m/^\s*$/;
670
671 if ($line =~ m/^\*(\S+)$/) {
672 $table = $1;
673 return;
674 }
675
676 return if $table ne 'filter';
677
678 if ($line =~ m/^:(\S+)\s/) {
679 my $chain = $1;
680 return if !&$is_pvefw_chain($chain);
3fa83edf 681 $res->{$chain} = "unknown";
09d5f68e 682 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
3fa83edf 683 my ($chain, $sig) = ($1, $2);
de2a57cd 684 return if !&$is_pvefw_chain($chain);
3fa83edf 685 $res->{$chain} = $sig;
de2a57cd
DM		 686 } else {
687 # simply ignore the rest
688 return;
689 }
690 };
691
692 run_command("/sbin/iptables-save", outfunc => $parser);
693
de2a57cd
DM		 694 return $res;
695}
696
3a616aa0
AD		 697sub iptables_chain_exist {
698 my ($chain) = @_;
699
700 eval{
701 iptables("-n --list $chain");
702 };
703 return undef if $@;
704
705 return 1;
706}
707
708sub iptables_rule_exist {
709 my ($rule) = @_;
710
711 eval{
712 iptables("-C $rule");
713 };
714 return undef if $@;
715
716 return 1;
717}
718
3fa83edf 719sub ruleset_generate_rule {
2f906466 720 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
3a616aa0 721
11bac5c2
DM		 722 return if $rule->{disable};
723
41524a58 724 my @cmd = ();
3a616aa0 725
41524a58
DM		 726 push @cmd, "-m iprange --src-range" if $rule->{nbsource} && $rule->{nbsource} > 1;
727 push @cmd, "-s $rule->{source}" if $rule->{source};
728 push @cmd, "-m iprange --dst-range" if $rule->{nbdest} && $rule->{nbdest} > 1;
729 push @cmd, "-d $rule->{dest}" if $rule->{dest};
4b586518 730
181390b0 731 if ($rule->{proto}) {
41524a58 732 push @cmd, "-p $rule->{proto}";
e3a1d391 733
181390b0
DM		 734 my $multiport = 0;
735 $multiport++ if $rule->{nbdport} && ($rule->{nbdport} > 1);
736 $multiport++ if $rule->{nbsport} && ($rule->{nbsport} > 1);
e3a1d391 737
41524a58 738 push @cmd, "--match multiport" if $multiport;
4b586518 739
181390b0
DM		 740 die "multiport: option '--sports' cannot be used together with '--dports'\n"
741 if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
742
743 if ($rule->{dport}) {
744 if ($rule->{proto} && $rule->{proto} eq 'icmp') {
745 # Note: we use dport to store --icmp-type
746 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
41524a58 747 push @cmd, "-m icmp --icmp-type $rule->{dport}";
181390b0
DM		 748 } else {
749 if ($rule->{nbdport} && $rule->{nbdport} > 1) {
750 if ($multiport == 2) {
41524a58 751 push @cmd, "--ports $rule->{dport}";
181390b0 752 } else {
41524a58 753 push @cmd, "--dports $rule->{dport}";
181390b0 754 }
e3a1d391 755 } else {
41524a58 756 push @cmd, "--dport $rule->{dport}";
e3a1d391 757 }
4b586518
DM		 758 }
759 }
4b586518 760
181390b0
DM		 761 if ($rule->{sport}) {
762 if ($rule->{nbsport} && $rule->{nbsport} > 1) {
41524a58 763 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
181390b0 764 } else {
41524a58 765 push @cmd, "--sport $rule->{sport}";
181390b0 766 }
4b586518 767 }
181390b0
DM		 768 } elsif ($rule->{dport} || $rule->{sport}) {
769 warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
770 warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
4b586518
DM		 771 }
772
41524a58 773 push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
4e6112f9
DM		 774
775 if (my $action = $rule->{action}) {
2f906466 776 $action = $actions->{$action} if defined($actions->{$action});
4e6112f9 777 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
41524a58 778 push @cmd, $goto ? "-g $action" : "-j $action";
181390b0 779 }
3a616aa0 780
41524a58
DM		 781 if (scalar(@cmd)) {
782 my $cmdstr = join(' ', @cmd);
783 ruleset_addrule($ruleset, $chain, $cmdstr);
784 }
3fa83edf
DM		 785}
786
787sub ruleset_create_chain {
788 my ($ruleset, $chain) = @_;
3a616aa0 789
d050c724
DM		 790 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
791
3fa83edf
DM		 792 die "chain '$chain' already exists\n" if $ruleset->{$chain};
793
794 $ruleset->{$chain} = [];
3a616aa0
AD		 795}
796
3fa83edf
DM		 797sub ruleset_chain_exist {
798 my ($ruleset, $chain) = @_;
3a616aa0 799
3fa83edf
DM		 800 return $ruleset->{$chain} ? 1 : undef;
801}
3a616aa0 802
3fa83edf
DM		 803sub ruleset_addrule {
804 my ($ruleset, $chain, $rule) = @_;
3a616aa0 805
3fa83edf 806 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 807
3fa83edf
DM		 808 push @{$ruleset->{$chain}}, "-A $chain $rule";
809}
3a616aa0 810
3fa83edf
DM		 811sub ruleset_insertrule {
812 my ($ruleset, $chain, $rule) = @_;
3a616aa0 813
3fa83edf 814 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 815
3fa83edf
DM		 816 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
817}
3a616aa0 818
3fa83edf
DM		 819sub generate_bridge_chains {
820 my ($ruleset, $bridge) = @_;
3a616aa0 821
dec84fcd
DM		 822 if (!ruleset_chain_exist($ruleset, "PVEFW-FORWARD")){
823 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
7fab95bc 824 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
3a616aa0
AD		 825 }
826
5927497d
DM		 827 if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
828 ruleset_create_chain($ruleset, "$bridge-FW");
829 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
830 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
9fcad984
AD		 831 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j DROP"); # disable interbridge routing
832 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j DROP"); # disable interbridge routing
3fa83edf 833 }
3a616aa0 834
3fa83edf
DM		 835 if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
836 ruleset_create_chain($ruleset, "$bridge-OUT");
5927497d 837 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-in -j $bridge-OUT");
9fcad984
AD		 838 }
839
840 if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
841 ruleset_create_chain($ruleset, "$bridge-IN");
5927497d 842 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j $bridge-IN");
fdb0bf20 843 ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
7323008d
DM		 844 # accept traffic to unmanaged bridge ports
845 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j ACCEPT ");
3fa83edf
DM		 846 }
847}
3a616aa0
AD		 848
849sub generate_tap_rules_direction {
92e976b3 850 my ($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, $direction) = @_;
fa9c4a6f 851
178a63be 852 my $lc_direction = lc($direction);
92e976b3
DM		 853
854 my $rules = $vmfw_conf->{rules};
178a63be 855
fa9c4a6f 856 my $options = $vmfw_conf->{options};
178a63be 857 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
3a616aa0
AD		 858
859 my $tapchain = "$iface-$direction";
860
3fa83edf 861 ruleset_create_chain($ruleset, $tapchain);
3a616aa0 862
bee633ab
DM		 863 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
864 ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
865 }
866
ce15d90b
DM		 867 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
868 ruleset_addrule($ruleset, $tapchain, "-p udp -m udp --dport 67:68 -j ACCEPT");
869 }
870
bee633ab
DM		 871 if ($options->{tcpflags}) {
872 ruleset_addrule($ruleset, $tapchain, "-p tcp -j PVEFW-tcpflags");
873 }
874
7fab95bc
DM		 875 ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate INVALID -j DROP");
876 ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
3a616aa0 877
9c6b6efd
DM		 878 if ($direction eq 'OUT' && defined($macaddr) &&
879 !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
c29f55c9
DM		 880 ruleset_addrule($ruleset, $tapchain, "-m mac ! --mac-source $macaddr -j DROP");
881 }
882
92e976b3
DM		 883 foreach my $rule (@$rules) {
884 next if $rule->{iface} && $rule->{iface} ne $netid;
885 next if $rule->{disable};
886 if ($rule->{type} eq 'group') {
887 my $group_chain = "GROUP-$rule->{action}-$direction";
888 if(!ruleset_chain_exist($ruleset, $group_chain)){
889 generate_group_rules($ruleset, $groups_conf, $rule->{action});
890 }
891 ruleset_addrule($ruleset, $tapchain, "-j $group_chain");
892 ruleset_addrule($ruleset, $tapchain, "-m mark --mark 1 -j RETURN")
893 if $direction eq 'OUT';
894 } else {
895 next if $rule->{type} ne $lc_direction;
896 if ($direction eq 'OUT') {
897 ruleset_generate_rule($ruleset, $tapchain, $rule,
898 { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
4e6112f9 899 } else {
92e976b3 900 ruleset_generate_rule($ruleset, $tapchain, $rule, { REJECT => "PVEFW-reject" });
3a616aa0 901 }
4e6112f9 902 }
3a616aa0
AD		 903 }
904
ccae0b50
DM		 905 # implement policy
906 my $policy;
907
908 if ($direction eq 'OUT') {
909 $policy = $options->{'policy-out'} || 'ACCEPT'; # allow everything by default
910 } else {
911 $policy = $options->{'policy-in'} || 'DROP'; # allow everything by default
912 }
913
914 if ($policy eq 'ACCEPT') {
915 if ($direction eq 'OUT') {
fdb0bf20 916 ruleset_addrule($ruleset, $tapchain, "-g PVEFW-SET-ACCEPT-MARK");
ccae0b50
DM		 917 } else {
918 ruleset_addrule($ruleset, $tapchain, "-j ACCEPT");
919 }
920 } elsif ($policy eq 'DROP') {
178a63be 921
25c7b224 922 ruleset_addrule($ruleset, $tapchain, "-j PVEFW-Drop");
178a63be
DM		 923
924 ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-dropped: \" --log-level $loglevel")
925 if defined($loglevel);
926
ccae0b50
DM		 927 ruleset_addrule($ruleset, $tapchain, "-j DROP");
928 } elsif ($policy eq 'REJECT') {
25c7b224 929 ruleset_addrule($ruleset, $tapchain, "-j PVEFW-Reject");
178a63be
DM		 930
931 ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-reject: \" --log-level $loglevel")
932 if defined($loglevel);
933
25c7b224 934 ruleset_addrule($ruleset, $tapchain, "-g PVEFW-reject");
ccae0b50
DM		 935 } else {
936 # should not happen
937 die "internal error: unknown policy '$policy'";
938 }
3a616aa0 939
3fa83edf
DM		 940 # plug the tap chain to bridge chain
941 my $physdevdirection = $direction eq 'IN' ? "out" : "in";
942 my $rule = "-m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain";
943 ruleset_insertrule($ruleset, "$bridge-$direction", $rule);
3a616aa0 944
3fa83edf
DM		 945 if ($direction eq 'OUT'){
946 # add tap->host rules
947 my $rule = "-m physdev --physdev-$physdevdirection $iface -j $tapchain";
dec84fcd 948 ruleset_addrule($ruleset, "PVEFW-INPUT", $rule);
3a616aa0
AD		 949 }
950}
951
0bd5f137 952sub enablehostfw {
92e976b3 953 my ($ruleset, $hostfw_conf, $groups_conf) = @_;
0bd5f137 954
51bae274 955 # fixme: allow security groups
0bd5f137 956
92e976b3
DM		 957 my $options = $hostfw_conf->{options};
958 my $rules = $hostfw_conf->{rules};
178a63be 959
3fa83edf 960 # host inbound firewall
dec84fcd
DM		 961 my $chain = "PVEFW-HOST-IN";
962 ruleset_create_chain($ruleset, $chain);
0bd5f137 963
178a63be
DM		 964 my $loglevel = get_option_log_level($options, "log_level_in");
965
7fab95bc
DM		 966 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
967 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
dec84fcd
DM		 968 ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
969 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
7fab95bc 970 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
dec84fcd 971 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 972
92e976b3
DM		 973 foreach my $rule (@$rules) {
974 next if $rule->{type} ne 'in';
975 # we use RETURN because we need to check also tap rules
976 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => 'RETURN', REJECT => "PVEFW-reject" });
0bd5f137
AD		 977 }
978
178a63be
DM		 979 ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-IN dropped: \" --log-level $loglevel")
980 if defined($loglevel);
981
dec84fcd 982 ruleset_addrule($ruleset, $chain, "-j DROP");
0bd5f137 983
3fa83edf 984 # host outbound firewall
aadd745e 985 $chain = "PVEFW-HOST-OUT";
dec84fcd
DM		 986 ruleset_create_chain($ruleset, $chain);
987
178a63be
DM		 988 $loglevel = get_option_log_level($options, "log_level_out");
989
7fab95bc
DM		 990 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
991 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
dec84fcd
DM		 992 ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
993 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
7fab95bc 994 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
dec84fcd 995 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 996
92e976b3
DM		 997 foreach my $rule (@$rules) {
998 next if $rule->{type} ne 'out';
999 # we use RETURN because we need to check also tap rules
1000 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => 'RETURN', REJECT => "PVEFW-reject" });
0bd5f137
AD		 1001 }
1002
178a63be
DM		 1003 ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-OUT dropped: \" --log-level $loglevel")
1004 if defined($loglevel);
1005
dec84fcd 1006 ruleset_addrule($ruleset, $chain, "-j DROP");
6158271d 1007
dec84fcd
DM		 1008 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1009 ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
9d31b418
AD		 1010}
1011
1012sub generate_group_rules {
92e976b3 1013 my ($ruleset, $groups_conf, $group) = @_;
9d31b418 1014
92e976b3 1015 die "no such security group '$group'\n" if !$groups_conf->{$group};
9d31b418 1016
92e976b3 1017 my $rules = $groups_conf->{$group}->{rules};
6158271d 1018
3fa83edf 1019 my $chain = "GROUP-${group}-IN";
9d31b418 1020
3fa83edf 1021 ruleset_create_chain($ruleset, $chain);
9d31b418 1022
92e976b3
DM		 1023 foreach my $rule (@$rules) {
1024 next if $rule->{type} ne 'in';
1025 ruleset_generate_rule($ruleset, $chain, $rule, { REJECT => "PVEFW-reject" });
9d31b418
AD		 1026 }
1027
3fa83edf 1028 $chain = "GROUP-${group}-OUT";
9d31b418 1029
3fa83edf 1030 ruleset_create_chain($ruleset, $chain);
4e6112f9 1031 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
9d31b418 1032
92e976b3
DM		 1033 foreach my $rule (@$rules) {
1034 next if $rule->{type} ne 'out';
1035 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1036 # check also other tap rules later
1037 ruleset_generate_rule($ruleset, $chain, $rule,
1038 { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
9d31b418 1039 }
9d31b418
AD		 1040}
1041
51bae274
DM		 1042my $MAX_NETS = 32;
1043my $valid_netdev_names = {};
1044for (my $i = 0; $i < $MAX_NETS; $i++) {
1045 $valid_netdev_names->{"net$i"} = 1;
1046}
5e1267a5 1047
51bae274
DM		 1048sub parse_fw_rule {
1049 my ($line, $need_iface, $allow_groups) = @_;
5e1267a5 1050
a332200b 1051 my $macros = get_firewall_macros();
fcba0beb 1052 my $protocols = get_etc_protocols();
51bae274 1053
92e976b3 1054 my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
51bae274 1055
11bac5c2
DM		 1056 # we can add single line comments to the end of the rule
1057 my $comment = $1 if $line =~ s/#\s*(.*?)\s*$//;
1058
1059 # we can disable a rule when prefixed with '|'
1060 my $disable = 1 if $line =~ s/^\|//;
51bae274
DM		 1061
1062 my @data = split(/\s+/, $line);
92e976b3 1063 my $expected_elements = $need_iface ? 8 : 7;
51bae274
DM		 1064
1065 die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1066
1067 if ($need_iface) {
92e976b3 1068 ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
51bae274 1069 } else {
92e976b3 1070 ($type, $action, $source, $dest, $proto, $dport, $sport) = @data;
51bae274
DM		 1071 }
1072
92e976b3 1073 die "incomplete rule\n" if ! ($type && $action);
51bae274 1074
961b4928
DM		 1075 my $macro;
1076 my $macro_name;
1077
92e976b3
DM		 1078 $type = lc($type);
1079
1080 if ($type eq 'in' || $type eq 'out') {
1081 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1082 # OK
1083 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1084 ($macro_name, $action) = ($1, $2);
1085 my $lc_macro_name = lc($macro_name);
1086 my $preferred_name = $pve_fw_preferred_macro_names->{$lc_macro_name};
1087 $macro_name = $preferred_name if $preferred_name;
1088 $macro = $macros->{$lc_macro_name};
1089 die "unknown macro '$macro_name'\n" if !$macro;
1090 } else {
1091 die "unknown action '$action'\n";
1092 }
1093 } elsif ($type eq 'group') {
1094 die "wrong number of rule elements\n" if scalar(@data) != 3;
1095 die "groups disabled\n" if !$allow_groups;
1096
1097 die "invalid characters in group name\n" if $action !~ m/^[A-Za-z0-9_\-]+$/;
51bae274 1098 } else {
92e976b3 1099 die "unknown rule type '$type'\n";
51bae274
DM		 1100 }
1101
1102 if ($need_iface) {
1103 $iface = undef if $iface && $iface eq '-';
6158271d 1104 die "unknown interface '$iface'\n"
51bae274
DM		 1105 if defined($iface) && !$valid_netdev_names->{$iface};
1106 }
1107
1108 $proto = undef if $proto && $proto eq '-';
6158271d 1109 die "unknown protokol '$proto'\n" if $proto &&
51bae274
DM		 1110 !(defined($protocols->{byname}->{$proto}) ||
1111 defined($protocols->{byid}->{$proto}));
1112
1113 $source = undef if $source && $source eq '-';
1114 $dest = undef if $dest && $dest eq '-';
1115
1116 $dport = undef if $dport && $dport eq '-';
1117 $sport = undef if $sport && $sport eq '-';
1118
51bae274
DM		 1119 my $nbsource = undef;
1120 my $nbdest = undef;
1121
1122 $nbsource = parse_address_list($source) if $source;
1123 $nbdest = parse_address_list($dest) if $dest;
6158271d 1124
961b4928 1125 my $rules = [];
51bae274 1126
961b4928 1127 my $param = {
92e976b3 1128 type => $type,
11bac5c2
DM		 1129 disable => $disable,
1130 comment => $comment,
51bae274 1131 action => $action,
51bae274
DM		 1132 iface => $iface,
1133 source => $source,
1134 dest => $dest,
1135 nbsource => $nbsource,
1136 nbdest => $nbdest,
1137 proto => $proto,
1138 dport => $dport,
1139 sport => $sport,
51bae274 1140 };
961b4928
DM		 1141
1142 if ($macro) {
1143 foreach my $templ (@$macro) {
1144 my $rule = {};
faf7be7e 1145 my $param_used = {};
961b4928
DM		 1146 foreach my $k (keys %$templ) {
1147 my $v = $templ->{$k};
857f62c8
DM		 1148 if ($v eq 'PARAM') {
1149 $v = $param->{$k};
faf7be7e 1150 $param_used->{$k} = 1;
857f62c8
DM		 1151 } elsif ($v eq 'DEST') {
1152 $v = $param->{dest};
faf7be7e 1153 $param_used->{dest} = 1;
857f62c8
DM		 1154 } elsif ($v eq 'SOURCE') {
1155 $v = $param->{source};
faf7be7e 1156 $param_used->{source} = 1;
857f62c8
DM		 1157 }
1158
961b4928
DM		 1159 die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
1160 $rule->{$k} = $v;
1161 }
faf7be7e
DM		 1162 foreach my $k (keys %$param) {
1163 next if !defined($param->{$k});
1164 next if $param_used->{$k};
1165 if (defined($rule->{$k})) {
1166 die "parameter '$k' already define in macro (value = '$rule->{$k}')\n"
1167 if $rule->{$k} ne $param->{$k};
1168 } else {
1169 $rule->{$k} = $param->{$k};
1170 }
1171 }
961b4928
DM		 1172 push @$rules, $rule;
1173 }
1174 } else {
1175 push @$rules, $param;
1176 }
1177
1178 foreach my $rule (@$rules) {
6158271d 1179 $rule->{nbdport} = parse_port_name_number_or_range($rule->{dport})
961b4928 1180 if defined($rule->{dport});
6158271d 1181 $rule->{nbsport} = parse_port_name_number_or_range($rule->{sport})
961b4928
DM		 1182 if defined($rule->{sport});
1183 }
1184
1185 return $rules;
51bae274
DM		 1186}
1187
2d404ffc 1188sub parse_vmfw_option {
85c6eaed
DM		 1189 my ($line) = @_;
1190
1191 my ($opt, $value);
1192
178a63be
DM		 1193 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1194
ce15d90b 1195 if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
9c6b6efd
DM		 1196 $opt = lc($1);
1197 $value = int($2);
178a63be
DM		 1198 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1199 $opt = lc($1);
1200 $value = $2 ? lc($3) : '';
85c6eaed
DM		 1201 } elsif ($line =~ m/^(policy-(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1202 $opt = lc($1);
1203 $value = uc($3);
9c6b6efd 1204 } else {
85c6eaed
DM		 1205 chomp $line;
1206 die "can't parse option '$line'\n"
1207 }
1208
1209 return ($opt, $value);
1210}
1211
2d404ffc
DM		 1212sub parse_hostfw_option {
1213 my ($line) = @_;
1214
1215 my ($opt, $value);
1216
1217 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1218
1219 if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
1220 $opt = lc($1);
1221 $value = int($2);
178a63be 1222 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2d404ffc
DM		 1223 $opt = lc($1);
1224 $value = $2 ? lc($3) : '';
1225 } elsif ($line =~ m/^(policy-(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1226 $opt = lc($1);
1227 $value = uc($3);
1228 } else {
1229 chomp $line;
1230 die "can't parse option '$line'\n"
1231 }
1232
1233 return ($opt, $value);
1234}
1235
51bae274
DM		 1236sub parse_vm_fw_rules {
1237 my ($filename, $fh) = @_;
1238
92e976b3 1239 my $res = { rules => [], options => {}};
51bae274
DM		 1240
1241 my $section;
1242
5e1267a5
DM		 1243 while (defined(my $line = <$fh>)) {
1244 next if $line =~ m/^#/;
1245 next if $line =~ m/^\s*$/;
1246
961b4928
DM		 1247 my $linenr = $fh->input_line_number();
1248 my $prefix = "$filename (line $linenr)";
1249
85c6eaed 1250 if ($line =~ m/^\[(\S+)\]\s*$/i) {
5e1267a5 1251 $section = lc($1);
85c6eaed 1252 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
5e1267a5
DM		 1253 next;
1254 }
51bae274 1255 if (!$section) {
961b4928 1256 warn "$prefix: skip line - no section";
5e1267a5
DM		 1257 next;
1258 }
1259
85c6eaed
DM		 1260 next if !$res->{$section}; # skip undefined section
1261
1262 if ($section eq 'options') {
6158271d 1263 eval {
2d404ffc 1264 my ($opt, $value) = parse_vmfw_option($line);
85c6eaed
DM		 1265 $res->{options}->{$opt} = $value;
1266 };
1267 warn "$prefix: $@" if $@;
1268 next;
1269 }
1270
961b4928
DM		 1271 my $rules;
1272 eval { $rules = parse_fw_rule($line, 1, 1); };
51bae274 1273 if (my $err = $@) {
961b4928 1274 warn "$prefix: $err";
5e1267a5
DM		 1275 next;
1276 }
1277
961b4928 1278 push @{$res->{$section}}, @$rules;
51bae274
DM		 1279 }
1280
1281 return $res;
1282}
1283
1284sub parse_host_fw_rules {
1285 my ($filename, $fh) = @_;
1286
92e976b3 1287 my $res = { rules => [], options => {}};
51bae274
DM		 1288
1289 my $section;
1290
1291 while (defined(my $line = <$fh>)) {
1292 next if $line =~ m/^#/;
1293 next if $line =~ m/^\s*$/;
1294
961b4928
DM		 1295 my $linenr = $fh->input_line_number();
1296 my $prefix = "$filename (line $linenr)";
1297
2d404ffc 1298 if ($line =~ m/^\[(\S+)\]\s*$/i) {
51bae274 1299 $section = lc($1);
2d404ffc 1300 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
5e1267a5
DM		 1301 next;
1302 }
51bae274 1303 if (!$section) {
961b4928 1304 warn "$prefix: skip line - no section";
5e1267a5
DM		 1305 next;
1306 }
1307
2d404ffc
DM		 1308 next if !$res->{$section}; # skip undefined section
1309
1310 if ($section eq 'options') {
1311 eval {
2d404ffc
DM		 1312 my ($opt, $value) = parse_hostfw_option($line);
1313 $res->{options}->{$opt} = $value;
1314 };
1315 warn "$prefix: $@" if $@;
1316 next;
1317 }
1318
961b4928
DM		 1319 my $rules;
1320 eval { $rules = parse_fw_rule($line, 1, 1); };
ecbea048 1321 if (my $err = $@) {
961b4928 1322 warn "$prefix: $err";
ecbea048 1323 next;
ecbea048
DM		 1324 }
1325
961b4928 1326 push @{$res->{$section}}, @$rules;
51bae274 1327 }
ecbea048 1328
51bae274
DM		 1329 return $res;
1330}
4cdbb3b7 1331
51bae274
DM		 1332sub parse_group_fw_rules {
1333 my ($filename, $fh) = @_;
5e1267a5 1334
51bae274
DM		 1335 my $section;
1336 my $group;
1337
92e976b3 1338 my $res = { rules => [] };
6158271d 1339
51bae274
DM		 1340 while (defined(my $line = <$fh>)) {
1341 next if $line =~ m/^#/;
1342 next if $line =~ m/^\s*$/;
1343
961b4928
DM		 1344 my $linenr = $fh->input_line_number();
1345 my $prefix = "$filename (line $linenr)";
1346
92e976b3
DM		 1347 if ($line =~ m/^\[group\s+(\S+)\]\s*$/i) {
1348 $section = 'rules';
1349 $group = lc($1);
51bae274
DM		 1350 next;
1351 }
1352 if (!$section || !$group) {
961b4928 1353 warn "$prefix: skip line - no section";
51bae274
DM		 1354 next;
1355 }
1356
961b4928
DM		 1357 my $rules;
1358 eval { $rules = parse_fw_rule($line, 0, 0); };
51bae274 1359 if (my $err = $@) {
961b4928 1360 warn "$prefix: $err";
51bae274
DM		 1361 next;
1362 }
1363
961b4928 1364 push @{$res->{$group}->{$section}}, @$rules;
5e1267a5
DM		 1365 }
1366
1367 return $res;
1368}
1369
06320eb0
DM		 1370sub run_locked {
1371 my ($code, @param) = @_;
1372
1373 my $timeout = 10;
1374
1375 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
1376
1377 die $@ if $@;
1378
1379 return $res;
1380}
1381
5e1267a5
DM		 1382sub read_local_vm_config {
1383
1384 my $openvz = {};
1385
1386 my $qemu = {};
1387
1388 my $list = PVE::QemuServer::config_list();
1389
1390 foreach my $vmid (keys %$list) {
5e1267a5
DM		 1391 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
1392 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1393 $qemu->{$vmid} = $conf;
1394 }
1395 }
1396
1397 my $vmdata = { openvz => $openvz, qemu => $qemu };
1398
1399 return $vmdata;
1400};
1401
1402sub read_vm_firewall_rules {
1403 my ($vmdata) = @_;
1404 my $rules = {};
1405 foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
1406 my $filename = "/etc/pve/firewall/$vmid.fw";
1407 my $fh = IO::File->new($filename, O_RDONLY);
1408 next if !$fh;
1409
51bae274 1410 $rules->{$vmid} = parse_vm_fw_rules($filename, $fh);
5e1267a5
DM		 1411 }
1412
1413 return $rules;
1414}
1415
2d404ffc
DM		 1416sub get_option_log_level {
1417 my ($options, $k) = @_;
1418
1419 my $v = $options->{$k};
178a63be 1420 $v = $default_log_level if !defined($v);
2d404ffc
DM		 1421
1422 return undef if $v eq '' || $v eq 'nolog';
1423
1424 $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
1425
1426 return $v if ($v >= 0) && ($v <= 7);
1427
1428 warn "unknown log level ($k = '$v')\n";
1429
1430 return undef;
1431}
1432
d8f2505e 1433sub generate_std_chains {
2d404ffc
DM		 1434 my ($ruleset, $options) = @_;
1435
1436 my $loglevel = get_option_log_level($options, 'smurf_log_level');
1437
1438 # same as shorewall smurflog.
1439 if (defined($loglevel)) {
1440 $pve_std_chains-> {'PVEFW-smurflog'} = [
1441 "-j LOG --log-prefix \"smurfs-dropped\" --log-level $loglevel",
1442 "-j DROP",
1443 ];
1444 } else {
1445 $pve_std_chains-> {'PVEFW-smurflog'} = [ "-j DROP" ];
1446 }
1447
1448 # same as shorewall logflags action.
1449 $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
1450 if (defined($loglevel)) {
1451 $pve_std_chains-> {'PVEFW-logflags'} = [
1452 "-j LOG --log-prefix \"logflags-dropped:\" --log-level $loglevel --log-ip-options",
1453 "-j DROP",
1454 ];
1455 } else {
1456 $pve_std_chains-> {'PVEFW-logflags'} = [ "-j DROP" ];
1457 }
d8f2505e
DM		 1458
1459 foreach my $chain (keys %$pve_std_chains) {
1460 ruleset_create_chain($ruleset, $chain);
1461 foreach my $rule (@{$pve_std_chains->{$chain}}) {
1462 if (ref($rule)) {
1463 ruleset_generate_rule($ruleset, $chain, $rule);
1464 } else {
1465 ruleset_addrule($ruleset, $chain, $rule);
1466 }
1467 }
1468 }
1469}
1470
6b9f68a2
DM		 1471sub save_pvefw_status {
1472 my ($status) = @_;
1473
1474 die "unknown status '$status' - internal error"
1475 if $status !~ m/^(stopped|active)$/;
1476
1477 mkdir dirname($pve_fw_status_filename);
1478 PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
1479}
1480
1481sub read_pvefw_status {
1482
1483 my $status = 'unknown';
1484
1485 return 'stopped' if ! -f $pve_fw_status_filename;
1486
1487 eval {
1488 $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
1489 };
1490 warn $@ if $@;
1491
1492 return $status;
1493}
1494
5e1267a5 1495sub compile {
5e1267a5
DM		 1496 my $vmdata = read_local_vm_config();
1497 my $rules = read_vm_firewall_rules($vmdata);
6158271d 1498
92e976b3 1499 my $groups_conf = {};
51bae274
DM		 1500 my $filename = "/etc/pve/firewall/groups.fw";
1501 if (my $fh = IO::File->new($filename, O_RDONLY)) {
92e976b3 1502 $groups_conf = parse_group_fw_rules($filename, $fh);
51bae274 1503 }
5e1267a5 1504
3fa83edf
DM		 1505 #print Dumper($rules);
1506
1507 my $ruleset = {};
1508
dec84fcd
DM		 1509 ruleset_create_chain($ruleset, "PVEFW-INPUT");
1510 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
fadb13dd 1511 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3fa83edf 1512
92e976b3
DM		 1513 my $hostfw_options = {};
1514 my $hostfw_conf;
4e6112f9 1515
51bae274
DM		 1516 $filename = "/etc/pve/local/host.fw";
1517 if (my $fh = IO::File->new($filename, O_RDONLY)) {
92e976b3
DM		 1518 $hostfw_conf = parse_host_fw_rules($filename, $fh);
1519 $hostfw_options = $hostfw_conf->{options};
2d404ffc 1520 }
fadb13dd 1521
92e976b3 1522 generate_std_chains($ruleset, $hostfw_options);
fadb13dd 1523
92e976b3
DM		 1524 my $hostfw_enable = $hostfw_conf &&
1525 !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2d404ffc 1526
92e976b3 1527 enablehostfw($ruleset, $hostfw_conf, $groups_conf) if $hostfw_enable;
3fa83edf 1528
6158271d 1529 # generate firewall rules for QEMU VMs
3fa83edf
DM		 1530 foreach my $vmid (keys %{$vmdata->{qemu}}) {
1531 my $conf = $vmdata->{qemu}->{$vmid};
fa9c4a6f
DM		 1532 my $vmfw_conf = $rules->{$vmid};
1533 next if !$vmfw_conf;
1534 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
3fa83edf
DM		 1535
1536 foreach my $netid (keys %$conf) {
1537 next if $netid !~ m/^net(\d+)$/;
1538 my $net = PVE::QemuServer::parse_net($conf->{$netid});
1539 next if !$net;
1540 my $iface = "tap${vmid}i$1";
5e1267a5 1541
3fa83edf
DM		 1542 my $bridge = $net->{bridge};
1543 next if !$bridge; # fixme: ?
1544
1545 $bridge .= "v$net->{tag}" if $net->{tag};
1546
1547 generate_bridge_chains($ruleset, $bridge);
1548
c29f55c9 1549 my $macaddr = $net->{macaddr};
92e976b3
DM		 1550 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'IN');
1551 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'OUT');
3fa83edf
DM		 1552 }
1553 }
c0413e35 1554
92e976b3 1555 if ($hostfw_enable) {
fadb13dd
DM		 1556 # allow traffic from lo (ourself)
1557 ruleset_addrule($ruleset, "PVEFW-INPUT", "-i lo -j ACCEPT");
1558 }
c0413e35 1559
3fa83edf
DM		 1560 return $ruleset;
1561}
1562
1563sub get_ruleset_status {
1564 my ($ruleset, $verbose) = @_;
1565
1566 my $active_chains = iptables_get_chains();
1567
1568 my $statushash = {};
1569
1570 foreach my $chain (sort keys %$ruleset) {
09d5f68e 1571 my $digest = Digest::SHA->new('sha1');
3fa83edf
DM		 1572 foreach my $cmd (@{$ruleset->{$chain}}) {
1573 $digest->add("$cmd\n");
1574 }
1575 my $sig = $digest->b64digest;
1576 $statushash->{$chain}->{sig} = $sig;
1577
1578 my $oldsig = $active_chains->{$chain};
1579 if (!defined($oldsig)) {
1580 $statushash->{$chain}->{action} = 'create';
1581 } else {
1582 if ($oldsig eq $sig) {
1583 $statushash->{$chain}->{action} = 'exists';
1584 } else {
1585 $statushash->{$chain}->{action} = 'update';
1586 }
1587 }
1588 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
1589 foreach my $cmd (@{$ruleset->{$chain}}) {
1590 print "\t$cmd\n" if $verbose;
1591 }
1592 }
1593
1594 foreach my $chain (sort keys %$active_chains) {
1595 if (!defined($ruleset->{$chain})) {
1596 my $sig = $active_chains->{$chain};
1597 $statushash->{$chain}->{action} = 'delete';
1598 $statushash->{$chain}->{sig} = $sig;
1599 print "delete $chain ($sig)\n" if $verbose;
1600 }
6158271d 1601 }
3fa83edf
DM		 1602
1603 return $statushash;
1604}
1605
1606sub print_ruleset {
1607 my ($ruleset) = @_;
1608
1609 get_ruleset_status($ruleset, 1);
1610}
1611
1612sub print_sig_rule {
1613 my ($chain, $sig) = @_;
1614
09d5f68e
DM		 1615 # We just use this to store a SHA1 checksum used to detect changes
1616 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
b6360c3f
DM		 1617}
1618
6b9f68a2 1619sub get_rulset_cmdlist {
a84f4d96 1620 my ($ruleset, $verbose) = @_;
3fa83edf 1621
3fa83edf
DM		 1622 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
1623
1624 my $statushash = get_ruleset_status($ruleset, $verbose);
1625
1626 # create missing chains first
1627 foreach my $chain (sort keys %$ruleset) {
1628 my $stat = $statushash->{$chain};
1629 die "internal error" if !$stat;
1630 next if $stat->{action} ne 'create';
886aba9c 1631
3fa83edf
DM		 1632 $cmdlist .= ":$chain - [0:0]\n";
1633 }
1634
dec84fcd 1635 my $rule = "INPUT -j PVEFW-INPUT";
3fa83edf
DM		 1636 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1637 $cmdlist .= "-A $rule\n";
1638 }
dec84fcd 1639 $rule = "OUTPUT -j PVEFW-OUTPUT";
3fa83edf
DM		 1640 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1641 $cmdlist .= "-A $rule\n";
1642 }
1643
dec84fcd 1644 $rule = "FORWARD -j PVEFW-FORWARD";
3fa83edf
DM		 1645 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1646 $cmdlist .= "-A $rule\n";
1647 }
1648
1649 foreach my $chain (sort keys %$ruleset) {
1650 my $stat = $statushash->{$chain};
1651 die "internal error" if !$stat;
1652
1653 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
1654 $cmdlist .= "-F $chain\n";
1655 foreach my $cmd (@{$ruleset->{$chain}}) {
1656 $cmdlist .= "$cmd\n";
1657 }
1658 $cmdlist .= print_sig_rule($chain, $stat->{sig});
1659 } elsif ($stat->{action} eq 'delete') {
f5d28682 1660 die "internal error"; # this should not happen
3fa83edf
DM		 1661 } elsif ($stat->{action} eq 'exists') {
1662 # do nothing
1663 } else {
1664 die "internal error - unknown status '$stat->{action}'";
1665 }
1666 }
1667
f5d28682
DM		 1668 foreach my $chain (keys %$statushash) {
1669 next if $statushash->{$chain}->{action} ne 'delete';
1670 $cmdlist .= "-F $chain\n";
1671 }
1672 foreach my $chain (keys %$statushash) {
1673 next if $statushash->{$chain}->{action} ne 'delete';
fadb13dd
DM		 1674 next if $chain eq 'PVEFW-INPUT';
1675 next if $chain eq 'PVEFW-OUTPUT';
1676 next if $chain eq 'PVEFW-FORWARD';
f5d28682
DM		 1677 $cmdlist .= "-X $chain\n";
1678 }
1679
3fa83edf
DM		 1680 $cmdlist .= "COMMIT\n";
1681
6b9f68a2
DM		 1682 return $cmdlist;
1683}
1684
1685sub apply_ruleset {
1686 my ($ruleset, $verbose) = @_;
1687
1688 enable_bridge_firewall();
1689
1690 my $cmdlist = get_rulset_cmdlist($ruleset, $verbose);
1691
3fa83edf
DM		 1692 print $cmdlist if $verbose;
1693
1694 iptables_restore_cmdlist($cmdlist);
1695
6158271d 1696 # test: re-read status and check if everything is up to date
6b9f68a2 1697 my $statushash = get_ruleset_status($ruleset);
3fa83edf
DM		 1698
1699 my $errors;
1700 foreach my $chain (sort keys %$ruleset) {
1701 my $stat = $statushash->{$chain};
1702 if ($stat->{action} ne 'exists') {
1703 warn "unable to update chain '$chain'\n";
1704 $errors = 1;
1705 }
1706 }
b6360c3f 1707
3fa83edf 1708 die "unable to apply firewall changes\n" if $errors;
b6360c3f
DM		 1709}
1710
6b9f68a2
DM		 1711sub update {
1712 my ($start, $verbose) = @_;
1713
1714 my $code = sub {
1715 my $status = read_pvefw_status();
1716
1717 my $ruleset = PVE::Firewall::compile();
1718
1719 if ($start || $status eq 'active') {
1720
1721 save_pvefw_status('active') if ($status ne 'active');
1722
1723 PVE::Firewall::apply_ruleset($ruleset, $verbose);
1724 } else {
1725 print "Firewall not active (status = $status)\n" if $verbose;
1726 }
1727 };
1728
1729 run_locked($code);
1730}
1731
1732
b6360c3f 17331;
Firewall test scripts