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correctly apply macros
[pve-firewall.git] / PVE / Firewall.pm
CommitLineData
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;
5e1267a5
DM		 9use File::Path;
10use IO::File;
ecbea048 11use Net::IP;
06320eb0 12use PVE::Tools qw(run_command lock_file);
ecbea048 13
5e1267a5 14use Data::Dumper;
b6360c3f 15
06320eb0
DM		 16my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
17
857f62c8 18# imported/converted from: /usr/share/shorewall/macro.*
961b4928 19my $pve_fw_macros = {
857f62c8
DM		 20 'Amanda' => [
21 { action => 'PARAM', proto => 'udp', dport => '10080' },
22 { action => 'PARAM', proto => 'tcp', dport => '10080' },
23 ],
24 'Auth' => [
25 { action => 'PARAM', proto => 'tcp', dport => '113' },
26 ],
27 'BGP' => [
28 { action => 'PARAM', proto => 'tcp', dport => '179' },
29 ],
30 'BitTorrent' => [
961b4928 31 { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
857f62c8
DM		 32 { action => 'PARAM', proto => 'udp', dport => '6881' },
33 ],
34 'BitTorrent32' => [
35 { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
36 { action => 'PARAM', proto => 'udp', dport => '6881' },
37 ],
38 'CVS' => [
39 { action => 'PARAM', proto => 'tcp', dport => '2401' },
40 ],
41 'Citrix' => [
42 { action => 'PARAM', proto => 'tcp', dport => '1494' },
43 { action => 'PARAM', proto => 'udp', dport => '1604' },
44 { action => 'PARAM', proto => 'tcp', dport => '2598' },
45 ],
46 'DAAP' => [
47 { action => 'PARAM', proto => 'tcp', dport => '3689' },
48 { action => 'PARAM', proto => 'udp', dport => '3689' },
49 ],
50 'DCC' => [
51 { action => 'PARAM', proto => 'tcp', dport => '6277' },
52 ],
53 'DHCPfwd' => [
54 { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
55 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' },
56 ],
57 'DNS' => [
58 { action => 'PARAM', proto => 'udp', dport => '53' },
59 { action => 'PARAM', proto => 'tcp', dport => '53' },
60 ],
61 'Distcc' => [
62 { action => 'PARAM', proto => 'tcp', dport => '3632' },
63 ],
64 'Edonkey' => [
65 { action => 'PARAM', proto => 'tcp', dport => '4662' },
66 { action => 'PARAM', proto => 'udp', dport => '4665' },
961b4928 67 ],
857f62c8
DM		 68 'FTP' => [
69 { action => 'PARAM', proto => 'tcp', dport => '21' },
70 ],
71 'Finger' => [
72 { action => 'PARAM', proto => 'tcp', dport => '79' },
73 ],
74 'GNUnet' => [
75 { action => 'PARAM', proto => 'tcp', dport => '2086' },
76 { action => 'PARAM', proto => 'udp', dport => '2086' },
77 { action => 'PARAM', proto => 'tcp', dport => '1080' },
78 { action => 'PARAM', proto => 'udp', dport => '1080' },
79 ],
80 'GRE' => [
81 { action => 'PARAM', proto => '47' },
82 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
83 ],
84 'Git' => [
85 { action => 'PARAM', proto => 'tcp', dport => '9418' },
86 ],
87 'Gnutella' => [
88 { action => 'PARAM', proto => 'tcp', dport => '6346' },
89 { action => 'PARAM', proto => 'udp', dport => '6346' },
90 ],
91 'HKP' => [
92 { action => 'PARAM', proto => 'tcp', dport => '11371' },
93 ],
94 'HTTP' => [
961b4928
DM		 95 { action => 'PARAM', proto => 'tcp', dport => '80' },
96 ],
857f62c8
DM		 97 'HTTPS' => [
98 { action => 'PARAM', proto => 'tcp', dport => '443' },
99 ],
100 'ICPV2' => [
101 { action => 'PARAM', proto => 'udp', dport => '3130' },
102 ],
103 'ICQ' => [
104 { action => 'PARAM', proto => 'tcp', dport => '5190' },
105 ],
106 'IMAP' => [
107 { action => 'PARAM', proto => 'tcp', dport => '143' },
108 ],
109 'IMAPS' => [
110 { action => 'PARAM', proto => 'tcp', dport => '993' },
111 ],
112 'IPIP' => [
113 { action => 'PARAM', proto => '94' },
114 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' },
115 ],
116 'IPP' => [
117 { action => 'PARAM', proto => 'tcp', dport => '631' },
118 ],
119 'IPPbrd' => [
120 { action => 'PARAM', proto => 'udp', dport => '631' },
121 ],
122 'IPPserver' => [
123 { action => 'PARAM', source => 'SOURCE', dest => 'DEST', proto => 'tcp', dport => '631' },
124 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '631' },
125 ],
126 'IPsec' => [
127 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
128 { action => 'PARAM', proto => '50' },
129 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
130 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
131 ],
132 'IPsecah' => [
133 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
134 { action => 'PARAM', proto => '51' },
135 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
136 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' },
137 ],
138 'IPsecnat' => [
139 { action => 'PARAM', proto => 'udp', dport => '500' },
140 { action => 'PARAM', proto => 'udp', dport => '4500' },
141 { action => 'PARAM', proto => '50' },
142 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' },
143 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' },
144 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
145 ],
146 'IRC' => [
147 { action => 'PARAM', proto => 'tcp', dport => '6667' },
148 ],
149 'JabberPlain' => [
150 { action => 'PARAM', proto => 'tcp', dport => '5222' },
151 ],
152 'JabberSecure' => [
153 { action => 'PARAM', proto => 'tcp', dport => '5223' },
154 ],
155 'Jabberd' => [
156 { action => 'PARAM', proto => 'tcp', dport => '5269' },
157 ],
158 'Jetdirect' => [
159 { action => 'PARAM', proto => 'tcp', dport => '9100' },
160 ],
161 'L2TP' => [
162 { action => 'PARAM', proto => 'udp', dport => '1701' },
163 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' },
164 ],
165 'LDAP' => [
166 { action => 'PARAM', proto => 'tcp', dport => '389' },
167 ],
168 'LDAPS' => [
169 { action => 'PARAM', proto => 'tcp', dport => '636' },
170 ],
171 'MSNP' => [
172 { action => 'PARAM', proto => 'tcp', dport => '1863' },
173 ],
174 'MSSQL' => [
175 { action => 'PARAM', proto => 'tcp', dport => '1433' },
176 ],
177 'Mail' => [
178 { action => 'PARAM', proto => 'tcp', dport => '25' },
179 { action => 'PARAM', proto => 'tcp', dport => '465' },
180 { action => 'PARAM', proto => 'tcp', dport => '587' },
181 ],
182 'Munin' => [
183 { action => 'PARAM', proto => 'tcp', dport => '4949' },
184 ],
185 'MySQL' => [
186 { action => 'PARAM', proto => 'tcp', dport => '3306' },
187 ],
188 'NNTP' => [
189 { action => 'PARAM', proto => 'tcp', dport => '119' },
190 ],
191 'NNTPS' => [
192 { action => 'PARAM', proto => 'tcp', dport => '563' },
193 ],
194 'NTP' => [
195 { action => 'PARAM', proto => 'udp', dport => '123' },
196 ],
197 'NTPbi' => [
198 { action => 'PARAM', proto => 'udp', dport => '123' },
199 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' },
200 ],
201 'NTPbrd' => [
202 { action => 'PARAM', proto => 'udp', dport => '123' },
203 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '123' },
204 ],
205 'OSPF' => [
206 { action => 'PARAM', proto => '89' },
207 ],
208 'OpenVPN' => [
209 { action => 'PARAM', proto => 'udp', dport => '1194' },
210 ],
211 'PCA' => [
212 { action => 'PARAM', proto => 'udp', dport => '5632' },
213 { action => 'PARAM', proto => 'tcp', dport => '5631' },
214 ],
215 'POP3' => [
216 { action => 'PARAM', proto => 'tcp', dport => '110' },
217 ],
218 'POP3S' => [
219 { action => 'PARAM', proto => 'tcp', dport => '995' },
220 ],
221 'PPtP' => [
222 { action => 'PARAM', proto => '47' },
223 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
224 { action => 'PARAM', proto => 'tcp', dport => '1723' },
225 ],
226 'Ping' => [
227 { action => 'PARAM', proto => 'icmp', dport => '8' },
228 ],
229 'PostgreSQL' => [
230 { action => 'PARAM', proto => 'tcp', dport => '5432' },
231 ],
232 'Printer' => [
233 { action => 'PARAM', proto => 'tcp', dport => '515' },
234 ],
235 'RDP' => [
236 { action => 'PARAM', proto => 'tcp', dport => '3389' },
237 ],
238 'RIPbi' => [
239 { action => 'PARAM', proto => 'udp', dport => '520' },
240 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' },
241 ],
242 'RNDC' => [
243 { action => 'PARAM', proto => 'tcp', dport => '953' },
244 ],
245 'Razor' => [
246 { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
247 ],
248 'Rdate' => [
249 { action => 'PARAM', proto => 'tcp', dport => '37' },
250 ],
251 'Rsync' => [
252 { action => 'PARAM', proto => 'tcp', dport => '873' },
253 ],
254 'SANE' => [
255 { action => 'PARAM', proto => 'tcp', dport => '6566' },
256 ],
257 'SMB' => [
258 { action => 'PARAM', proto => 'udp', dport => '135,445' },
259 { action => 'PARAM', proto => 'udp', dport => '137:139' },
260 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
261 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
262 ],
263 'SMBBI' => [
264 { action => 'PARAM', proto => 'udp', dport => '135,445' },
265 { action => 'PARAM', proto => 'udp', dport => '137:139' },
266 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
267 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
268 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' },
269 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' },
270 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' },
271 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' },
272 ],
273 'SMBswat' => [
274 { action => 'PARAM', proto => 'tcp', dport => '901' },
275 ],
276 'SMTP' => [
277 { action => 'PARAM', proto => 'tcp', dport => '25' },
278 ],
279 'SMTPS' => [
280 { action => 'PARAM', proto => 'tcp', dport => '465' },
281 ],
282 'SNMP' => [
283 { action => 'PARAM', proto => 'udp', dport => '161:162' },
284 { action => 'PARAM', proto => 'tcp', dport => '161' },
285 ],
286 'SPAMD' => [
287 { action => 'PARAM', proto => 'tcp', dport => '783' },
288 ],
289 'SSH' => [
290 { action => 'PARAM', proto => 'tcp', dport => '22' },
291 ],
292 'SVN' => [
293 { action => 'PARAM', proto => 'tcp', dport => '3690' },
294 ],
295 'SixXS' => [
296 { action => 'PARAM', proto => 'tcp', dport => '3874' },
297 { action => 'PARAM', proto => 'udp', dport => '3740' },
298 { action => 'PARAM', proto => '41' },
299 { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
300 ],
301 'Squid' => [
302 { action => 'PARAM', proto => 'tcp', dport => '3128' },
303 ],
304 'Submission' => [
305 { action => 'PARAM', proto => 'tcp', dport => '587' },
306 ],
307 'Syslog' => [
308 { action => 'PARAM', proto => 'udp', dport => '514' },
309 { action => 'PARAM', proto => 'tcp', dport => '514' },
310 ],
311 'TFTP' => [
312 { action => 'PARAM', proto => 'udp', dport => '69' },
313 ],
314 'Telnet' => [
315 { action => 'PARAM', proto => 'tcp', dport => '23' },
316 ],
317 'Telnets' => [
318 { action => 'PARAM', proto => 'tcp', dport => '992' },
319 ],
320 'Time' => [
321 { action => 'PARAM', proto => 'tcp', dport => '37' },
322 ],
323 'Trcrt' => [
324 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
325 { action => 'PARAM', proto => 'icmp', dport => '8' },
326 ],
327 'VNC' => [
328 { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
329 ],
330 'VNCL' => [
331 { action => 'PARAM', proto => 'tcp', dport => '5500' },
332 ],
333 'Web' => [
334 { action => 'PARAM', proto => 'tcp', dport => '80' },
961b4928
DM		 335 { action => 'PARAM', proto => 'tcp', dport => '443' },
336 ],
857f62c8
DM		 337 'Webcache' => [
338 { action => 'PARAM', proto => 'tcp', dport => '8080' },
339 ],
340 'Webmin' => [
341 { action => 'PARAM', proto => 'tcp', dport => '10000' },
342 ],
343 'Whois' => [
344 { action => 'PARAM', proto => 'tcp', dport => '43' },
345 ],
961b4928
DM		 346};
347
348my $pve_fw_parsed_macros;
349my $pve_fw_preferred_macro_names = {};
3a616aa0 350
d8f2505e
DM		 351my $pve_std_chains = {
352 'PVEFW-SET-ACCEPT-MARK' => [
353 "-j MARK --set-mark 1",
354 ],
79929d9c
DM		 355 'PVEFW-DropBroadcast' => [
356 # same as shorewall 'Broadcast'
357 # simply DROP BROADCAST/MULTICAST/ANYCAST
358 # we can use this to reduce logging
359 { action => 'DROP', dsttype => 'BROADCAST' },
360 { action => 'DROP', dsttype => 'MULTICAST' },
361 { action => 'DROP', dsttype => 'ANYCAST' },
362 { action => 'DROP', dest => '224.0.0.0/4' },
363 ],
364 'PVEFW-reject' => [
365 # same as shorewall 'reject'
366 { action => 'DROP', dsttype => 'BROADCAST' },
367 { action => 'DROP', source => '224.0.0.0/4' },
368 { action => 'DROP', proto => 'icmp' },
369 "-p tcp -j REJECT --reject-with tcp-reset",
370 "-p udp -j REJECT --reject-with icmp-port-unreachable",
371 "-p icmp -j REJECT --reject-with icmp-host-unreachable",
372 "-j REJECT --reject-with icmp-host-prohibited",
373 ],
374 'PVEFW-Drop' => [
375 # same as shorewall 'Drop', which is equal to DROP,
376 # but REJECT/DROP some packages to reduce logging,
377 # and ACCEPT critical ICMP types
378 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
379 # we are not interested in BROADCAST/MULTICAST/ANYCAST
380 { action => 'PVEFW-DropBroadcast' },
381 # ACCEPT critical ICMP types
382 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
383 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
384 # Drop packets with INVALID state
385 "-m conntrack --ctstate INVALID -j DROP",
386 # Drop Microsoft SMB noise
387 { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
388 { action => 'DROP', proto => 'udp', dport => '137:139'},
389 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
390 { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
391 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
392 # Drop new/NotSyn traffic so that it doesn't get logged
393 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
394 # Drop DNS replies
395 { action => 'DROP', proto => 'udp', sport => 53 },
396 ],
397 'PVEFW-Reject' => [
398 # same as shorewall 'Reject', which is equal to Reject,
399 # but REJECT/DROP some packages to reduce logging,
400 # and ACCEPT critical ICMP types
401 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
402 # we are not interested in BROADCAST/MULTICAST/ANYCAST
403 { action => 'PVEFW-DropBroadcast' },
404 # ACCEPT critical ICMP types
405 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
406 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
407 # Drop packets with INVALID state
408 "-m conntrack --ctstate INVALID -j DROP",
409 # Drop Microsoft SMB noise
410 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
411 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
412 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
413 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
414 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
415 # Drop new/NotSyn traffic so that it doesn't get logged
416 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
417 # Drop DNS replies
418 { action => 'DROP', proto => 'udp', sport => 53 },
419 ],
d86659ef 420 'PVEFW-logflags' => [
bee633ab 421 # same as shorewall logflags action. (fixme: enable/disable logging)
d86659ef
DM		 422 "-j LOG --log-prefix \"logflags-dropped:\" --log-level 4 --log-ip-options",
423 "-j DROP",
424 ],
425 'PVEFW-tcpflags' => [
426 # same as shorewall tcpflags action.
427 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
428 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
429 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
430 "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
431 "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
432 "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
433 ],
bee633ab
DM		 434 'PVEFW-smurflog' => [
435 # same as shorewall smurflog. (fixme: enable/disable logging)
436 "-j LOG --log-prefix \"smurfs-dropped\" --log-level 4",
437 "-j DROP",
438 ],
439 'PVEFW-smurfs' => [
440 # same as shorewall smurfs action
441 # Filter packets for smurfs (packets with a broadcast address as the source).
442 "-s 0.0.0.0/32 -j RETURN",
443 "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
444 "-s 224.0.0.0/4 -g PVEFW-smurflog",
445 ],
d8f2505e
DM		 446};
447
4b586518
DM		 448# iptables -p icmp -h
449my $icmp_type_names = {
450 any => 1,
451 'echo-reply' => 1,
452 'destination-unreachable' => 1,
453 'network-unreachable' => 1,
454 'host-unreachable' => 1,
455 'protocol-unreachable' => 1,
456 'port-unreachable' => 1,
457 'fragmentation-needed' => 1,
458 'source-route-failed' => 1,
459 'network-unknown' => 1,
460 'host-unknown' => 1,
461 'network-prohibited' => 1,
462 'host-prohibited' => 1,
463 'TOS-network-unreachable' => 1,
464 'TOS-host-unreachable' => 1,
465 'communication-prohibited' => 1,
466 'host-precedence-violation' => 1,
467 'precedence-cutoff' => 1,
468 'source-quench' => 1,
469 'redirect' => 1,
470 'network-redirect' => 1,
471 'host-redirect' => 1,
472 'TOS-network-redirect' => 1,
473 'TOS-host-redirect' => 1,
474 'echo-request' => 1,
475 'router-advertisement' => 1,
476 'router-solicitation' => 1,
477 'time-exceeded' => 1,
478 'ttl-zero-during-transit' => 1,
479 'ttl-zero-during-reassembly' => 1,
480 'parameter-problem' => 1,
481 'ip-header-bad' => 1,
482 'required-option-missing' => 1,
483 'timestamp-request' => 1,
484 'timestamp-reply' => 1,
485 'address-mask-request' => 1,
486 'address-mask-reply' => 1,
487};
488
a332200b 489sub get_firewall_macros {
9aab3127 490
961b4928 491 return $pve_fw_parsed_macros if $pve_fw_parsed_macros;
6158271d 492
961b4928 493 $pve_fw_parsed_macros = {};
9aab3127 494
961b4928
DM		 495 foreach my $k (keys %$pve_fw_macros) {
496 my $name = lc($k);
a332200b 497
961b4928
DM		 498 my $macro = $pve_fw_macros->{$k};
499 $pve_fw_preferred_macro_names->{$name} = $k;
500 $pve_fw_parsed_macros->{$name} = $macro;
501 }
a332200b 502
961b4928 503 return $pve_fw_parsed_macros;
9aab3127
DM		 504}
505
fcba0beb
DM		 506my $etc_services;
507
508sub get_etc_services {
509
510 return $etc_services if $etc_services;
511
512 my $filename = "/etc/services";
513
514 my $fh = IO::File->new($filename, O_RDONLY);
515 if (!$fh) {
516 warn "unable to read '$filename' - $!\n";
517 return {};
518 }
519
520 my $services = {};
521
522 while (my $line = <$fh>) {
523 chomp ($line);
524 next if $line =~m/^#/;
525 next if ($line =~m/^\s*$/);
526
527 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
528 $services->{byid}->{$2}->{name} = $1;
35b66e9d 529 $services->{byid}->{$2}->{port} = $2;
fcba0beb
DM		 530 $services->{byid}->{$2}->{$3} = 1;
531 $services->{byname}->{$1} = $services->{byid}->{$2};
532 }
533 }
534
535 close($fh);
536
6158271d
DM		 537 $etc_services = $services;
538
3a616aa0 539
fcba0beb
DM		 540 return $etc_services;
541}
542
543my $etc_protocols;
544
545sub get_etc_protocols {
546 return $etc_protocols if $etc_protocols;
547
548 my $filename = "/etc/protocols";
549
550 my $fh = IO::File->new($filename, O_RDONLY);
551 if (!$fh) {
552 warn "unable to read '$filename' - $!\n";
553 return {};
554 }
555
556 my $protocols = {};
557
558 while (my $line = <$fh>) {
559 chomp ($line);
560 next if $line =~m/^#/;
561 next if ($line =~m/^\s*$/);
562
563 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
564 $protocols->{byid}->{$2}->{name} = $1;
565 $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
566 }
567 }
568
569 close($fh);
570
571 $etc_protocols = $protocols;
572
573 return $etc_protocols;
574}
575
ecbea048
DM		 576sub parse_address_list {
577 my ($str) = @_;
578
d6de1dc2 579 my $nbaor = 0;
ecbea048
DM		 580 foreach my $aor (split(/,/, $str)) {
581 if (!Net::IP->new($aor)) {
582 my $err = Net::IP::Error();
583 die "invalid IP address: $err\n";
d6de1dc2
AD		 584 }else{
585 $nbaor++;
ecbea048
DM		 586 }
587 }
d6de1dc2 588 return $nbaor;
ecbea048 589}
dddd9413 590
fcba0beb
DM		 591sub parse_port_name_number_or_range {
592 my ($str) = @_;
593
594 my $services = PVE::Firewall::get_etc_services();
4cdbb3b7 595 my $nbports = 0;
fcba0beb 596 foreach my $item (split(/,/, $str)) {
4cdbb3b7 597 my $portlist = "";
35b66e9d 598 my $oldpon = undef;
4b586518 599 $nbports++;
fcba0beb 600 foreach my $pon (split(':', $item, 2)) {
35b66e9d 601 $pon = $services->{byname}->{$pon}->{port} if $services->{byname}->{$pon}->{port};
4cdbb3b7 602 if ($pon =~ m/^\d+$/){
857f62c8 603 die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535;
35b66e9d
AD		 604 die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon);
605 $oldpon = $pon;
4cdbb3b7
AD		 606 }else{
607 die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon};
608 }
fcba0beb
DM		 609 }
610 }
611
4cdbb3b7 612 return ($nbports);
fcba0beb
DM		 613}
614
780bcc0f
DM		 615my $bridge_firewall_enabled = 0;
616
617sub enable_bridge_firewall {
618
619 return if $bridge_firewall_enabled; # only once
620
621 system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables");
622 system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-ip6tables");
623
624 $bridge_firewall_enabled = 1;
625}
626
8cebfa6f 627my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
dddd9413 628
3a616aa0
AD		 629sub iptables {
630 my ($cmd) = @_;
631
632 run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {});
633}
634
b16e818e
DM		 635sub iptables_restore_cmdlist {
636 my ($cmdlist) = @_;
3a616aa0 637
3fa83edf 638 run_command("/sbin/iptables-restore -n", input => $cmdlist);
3a616aa0
AD		 639}
640
de2a57cd
DM		 641sub iptables_get_chains {
642
643 my $res = {};
644
645 # check what chains we want to track
646 my $is_pvefw_chain = sub {
647 my $name = shift;
648
dec84fcd
DM		 649 return 1 if $name =~ m/^PVEFW-\S+$/;
650
de2a57cd 651 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
5927497d 652 return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT)$/;
f50656c2 653 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
de2a57cd
DM		 654
655 return undef;
656 };
657
658 my $table = '';
659
de2a57cd
DM		 660 my $parser = sub {
661 my $line = shift;
662
663 return if $line =~ m/^#/;
664 return if $line =~ m/^\s*$/;
665
666 if ($line =~ m/^\*(\S+)$/) {
667 $table = $1;
668 return;
669 }
670
671 return if $table ne 'filter';
672
673 if ($line =~ m/^:(\S+)\s/) {
674 my $chain = $1;
675 return if !&$is_pvefw_chain($chain);
3fa83edf 676 $res->{$chain} = "unknown";
09d5f68e 677 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
3fa83edf 678 my ($chain, $sig) = ($1, $2);
de2a57cd 679 return if !&$is_pvefw_chain($chain);
3fa83edf 680 $res->{$chain} = $sig;
de2a57cd
DM		 681 } else {
682 # simply ignore the rest
683 return;
684 }
685 };
686
687 run_command("/sbin/iptables-save", outfunc => $parser);
688
de2a57cd
DM		 689 return $res;
690}
691
3a616aa0
AD		 692sub iptables_chain_exist {
693 my ($chain) = @_;
694
695 eval{
696 iptables("-n --list $chain");
697 };
698 return undef if $@;
699
700 return 1;
701}
702
703sub iptables_rule_exist {
704 my ($rule) = @_;
705
706 eval{
707 iptables("-C $rule");
708 };
709 return undef if $@;
710
711 return 1;
712}
713
3fa83edf 714sub ruleset_generate_rule {
4e6112f9 715 my ($ruleset, $chain, $rule, $goto) = @_;
3a616aa0 716
3fa83edf 717 my $cmd = '';
3a616aa0 718
d6de1dc2 719 $cmd .= " -m iprange --src-range" if $rule->{nbsource} && $rule->{nbsource} > 1;
3a616aa0 720 $cmd .= " -s $rule->{source}" if $rule->{source};
d6de1dc2 721 $cmd .= " -m iprange --dst-range" if $rule->{nbdest} && $rule->{nbdest} > 1;
8c32a215 722 $cmd .= " -d $rule->{dest}" if $rule->{dest};
3a616aa0 723 $cmd .= " -p $rule->{proto}" if $rule->{proto};
4b586518
DM		 724
725 if (($rule->{nbdport} && $rule->{nbdport} > 1) ||
726 ($rule->{nbsport} && $rule->{nbsport} > 1)) {
727 $cmd .= " --match multiport"
728 }
729
730 if ($rule->{dport}) {
731 if ($rule->{proto} && $rule->{proto} eq 'icmp') {
732 # Note: we use dport to store --icmp-type
733 die "unknown icmp-type\n" if !$icmp_type_names->{$rule->{dport}};
734 $cmd .= " -m icmp --icmp-type $rule->{dport}";
735 } else {
736 if ($rule->{nbdport} && $rule->{nbdport} > 1) {
737 $cmd .= " --dports $rule->{dport}";
738 } else {
739 $cmd .= " --dport $rule->{dport}";
740 }
741 }
742 }
743
744 if ($rule->{sport}) {
745 if ($rule->{nbsport} && $rule->{nbsport} > 1) {
746 $cmd .= " --sports $rule->{sport}";
747 } else {
748 $cmd .= " --sport $rule->{sport}";
749 }
750 }
751
752 $cmd .= " -m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
4e6112f9
DM		 753
754 if (my $action = $rule->{action}) {
755 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
756 $cmd .= $goto ? " -g $action" : " -j $action";
757 };
3a616aa0 758
3fa83edf
DM		 759 ruleset_addrule($ruleset, $chain, $cmd) if $cmd;
760}
761
762sub ruleset_create_chain {
763 my ($ruleset, $chain) = @_;
3a616aa0 764
d050c724
DM		 765 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
766
3fa83edf
DM		 767 die "chain '$chain' already exists\n" if $ruleset->{$chain};
768
769 $ruleset->{$chain} = [];
3a616aa0
AD		 770}
771
3fa83edf
DM		 772sub ruleset_chain_exist {
773 my ($ruleset, $chain) = @_;
3a616aa0 774
3fa83edf
DM		 775 return $ruleset->{$chain} ? 1 : undef;
776}
3a616aa0 777
3fa83edf
DM		 778sub ruleset_addrule {
779 my ($ruleset, $chain, $rule) = @_;
3a616aa0 780
3fa83edf 781 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 782
3fa83edf
DM		 783 push @{$ruleset->{$chain}}, "-A $chain $rule";
784}
3a616aa0 785
3fa83edf
DM		 786sub ruleset_insertrule {
787 my ($ruleset, $chain, $rule) = @_;
3a616aa0 788
3fa83edf 789 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 790
3fa83edf
DM		 791 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
792}
3a616aa0 793
3fa83edf
DM		 794sub generate_bridge_chains {
795 my ($ruleset, $bridge) = @_;
3a616aa0 796
dec84fcd
DM		 797 if (!ruleset_chain_exist($ruleset, "PVEFW-FORWARD")){
798 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
7fab95bc 799 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
3a616aa0
AD		 800 }
801
5927497d
DM		 802 if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
803 ruleset_create_chain($ruleset, "$bridge-FW");
804 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
805 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
9fcad984
AD		 806 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j DROP"); # disable interbridge routing
807 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j DROP"); # disable interbridge routing
3fa83edf 808 }
3a616aa0 809
3fa83edf
DM		 810 if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
811 ruleset_create_chain($ruleset, "$bridge-OUT");
5927497d 812 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-in -j $bridge-OUT");
9fcad984
AD		 813 }
814
815 if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
816 ruleset_create_chain($ruleset, "$bridge-IN");
5927497d 817 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j $bridge-IN");
fdb0bf20 818 ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
3fa83edf
DM		 819 }
820}
3a616aa0
AD		 821
822sub generate_tap_rules_direction {
fa9c4a6f
DM		 823 my ($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, $direction) = @_;
824
825 my $rules = $vmfw_conf->{lc($direction)};
826 my $options = $vmfw_conf->{options};
3a616aa0
AD		 827
828 my $tapchain = "$iface-$direction";
829
3fa83edf 830 ruleset_create_chain($ruleset, $tapchain);
3a616aa0 831
bee633ab
DM		 832 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
833 ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
834 }
835
836 if ($options->{tcpflags}) {
837 ruleset_addrule($ruleset, $tapchain, "-p tcp -j PVEFW-tcpflags");
838 }
839
7fab95bc
DM		 840 ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate INVALID -j DROP");
841 ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
3a616aa0 842
9c6b6efd
DM		 843 if ($direction eq 'OUT' && defined($macaddr) &&
844 !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
c29f55c9
DM		 845 ruleset_addrule($ruleset, $tapchain, "-m mac ! --mac-source $macaddr -j DROP");
846 }
847
d86659ef 848
3fa83edf 849 if ($rules) {
3a616aa0
AD		 850 foreach my $rule (@$rules) {
851 next if $rule->{iface} && $rule->{iface} ne $netid;
bfbfa8b6 852 # we go to $bridge-IN if accept in out rules
3a616aa0 853 if($rule->{action} =~ m/^(GROUP-(\S+))$/){
3fa83edf
DM		 854 $rule->{action} .= "-$direction";
855 # generate empty group rule if don't exist
856 if(!ruleset_chain_exist($ruleset, $rule->{action})){
51bae274 857 generate_group_rules($ruleset, $group_rules, $2);
3fa83edf 858 }
4e6112f9 859 ruleset_generate_rule($ruleset, $tapchain, $rule);
7b291cab 860 ruleset_addrule($ruleset, $tapchain, "-m mark --mark 1 -j RETURN")
31ff3ef6 861 if $direction eq 'OUT';
4e6112f9 862 } else {
fdb0bf20 863 $rule->{action} = "PVEFW-SET-ACCEPT-MARK" if $rule->{action} eq 'ACCEPT' && $direction eq 'OUT';
4e6112f9 864 ruleset_generate_rule($ruleset, $tapchain, $rule);
3a616aa0 865 }
4e6112f9 866 }
3a616aa0
AD		 867 }
868
ccae0b50
DM		 869 # implement policy
870 my $policy;
871
872 if ($direction eq 'OUT') {
873 $policy = $options->{'policy-out'} || 'ACCEPT'; # allow everything by default
874 } else {
875 $policy = $options->{'policy-in'} || 'DROP'; # allow everything by default
876 }
877
878 if ($policy eq 'ACCEPT') {
879 if ($direction eq 'OUT') {
fdb0bf20 880 ruleset_addrule($ruleset, $tapchain, "-g PVEFW-SET-ACCEPT-MARK");
ccae0b50
DM		 881 } else {
882 ruleset_addrule($ruleset, $tapchain, "-j ACCEPT");
883 }
884 } elsif ($policy eq 'DROP') {
25c7b224 885 ruleset_addrule($ruleset, $tapchain, "-j PVEFW-Drop");
ccae0b50
DM		 886 ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-dropped: \" --log-level 4");
887 ruleset_addrule($ruleset, $tapchain, "-j DROP");
888 } elsif ($policy eq 'REJECT') {
25c7b224 889 ruleset_addrule($ruleset, $tapchain, "-j PVEFW-Reject");
ccae0b50 890 ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-reject: \" --log-level 4");
25c7b224 891 ruleset_addrule($ruleset, $tapchain, "-g PVEFW-reject");
ccae0b50
DM		 892 } else {
893 # should not happen
894 die "internal error: unknown policy '$policy'";
895 }
3a616aa0 896
3fa83edf
DM		 897 # plug the tap chain to bridge chain
898 my $physdevdirection = $direction eq 'IN' ? "out" : "in";
899 my $rule = "-m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain";
900 ruleset_insertrule($ruleset, "$bridge-$direction", $rule);
3a616aa0 901
3fa83edf
DM		 902 if ($direction eq 'OUT'){
903 # add tap->host rules
904 my $rule = "-m physdev --physdev-$physdevdirection $iface -j $tapchain";
dec84fcd 905 ruleset_addrule($ruleset, "PVEFW-INPUT", $rule);
3a616aa0
AD		 906 }
907}
908
0bd5f137 909sub enablehostfw {
51bae274 910 my ($ruleset, $rules, $group_rules) = @_;
0bd5f137 911
51bae274 912 # fixme: allow security groups
0bd5f137 913
3fa83edf 914 # host inbound firewall
dec84fcd
DM		 915 my $chain = "PVEFW-HOST-IN";
916 ruleset_create_chain($ruleset, $chain);
0bd5f137 917
7fab95bc
DM		 918 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
919 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
dec84fcd
DM		 920 ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
921 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
7fab95bc 922 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
dec84fcd 923 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 924
3fa83edf
DM		 925 if ($rules->{in}) {
926 foreach my $rule (@{$rules->{in}}) {
927 # we use RETURN because we need to check also tap rules
928 $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT';
dec84fcd 929 ruleset_generate_rule($ruleset, $chain, $rule);
3fa83edf 930 }
0bd5f137
AD		 931 }
932
dec84fcd
DM		 933 ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-IN dropped: \" --log-level 4");
934 ruleset_addrule($ruleset, $chain, "-j DROP");
0bd5f137 935
3fa83edf 936 # host outbound firewall
aadd745e 937 $chain = "PVEFW-HOST-OUT";
dec84fcd
DM		 938 ruleset_create_chain($ruleset, $chain);
939
7fab95bc
DM		 940 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
941 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
dec84fcd
DM		 942 ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
943 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
7fab95bc 944 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
dec84fcd 945 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 946
3fa83edf
DM		 947 if ($rules->{out}) {
948 foreach my $rule (@{$rules->{out}}) {
949 # we use RETURN because we need to check also tap rules
950 $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT';
dec84fcd 951 ruleset_generate_rule($ruleset, $chain, $rule);
3fa83edf 952 }
0bd5f137
AD		 953 }
954
dec84fcd
DM		 955 ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-OUT dropped: \" --log-level 4");
956 ruleset_addrule($ruleset, $chain, "-j DROP");
6158271d 957
dec84fcd
DM		 958 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
959 ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
9d31b418
AD		 960}
961
962sub generate_group_rules {
51bae274 963 my ($ruleset, $group_rules, $group) = @_;
9d31b418 964
51bae274 965 my $rules = $group_rules->{$group};
9d31b418 966
51bae274 967 die "no such security group '$group'\n" if !$rules;
6158271d 968
3fa83edf 969 my $chain = "GROUP-${group}-IN";
9d31b418 970
3fa83edf 971 ruleset_create_chain($ruleset, $chain);
9d31b418 972
3fa83edf
DM		 973 if ($rules->{in}) {
974 foreach my $rule (@{$rules->{in}}) {
975 ruleset_generate_rule($ruleset, $chain, $rule);
9d31b418
AD		 976 }
977 }
978
3fa83edf 979 $chain = "GROUP-${group}-OUT";
9d31b418 980
3fa83edf 981 ruleset_create_chain($ruleset, $chain);
4e6112f9 982 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
9d31b418 983
3fa83edf
DM		 984 if ($rules->{out}) {
985 foreach my $rule (@{$rules->{out}}) {
6158271d
DM		 986 # we go the PVEFW-SET-ACCEPT-MARK Instead of ACCEPT) because we need to
987 # check also other tap rules (and group rules can be set on any bridge,
4e6112f9
DM		 988 # so we can't go to VMBRXX-IN)
989 $rule->{action} = 'PVEFW-SET-ACCEPT-MARK' if $rule->{action} eq 'ACCEPT';
6a6c7af7 990 ruleset_generate_rule($ruleset, $chain, $rule);
9d31b418
AD		 991 }
992 }
9d31b418
AD		 993}
994
51bae274
DM		 995my $MAX_NETS = 32;
996my $valid_netdev_names = {};
997for (my $i = 0; $i < $MAX_NETS; $i++) {
998 $valid_netdev_names->{"net$i"} = 1;
999}
5e1267a5 1000
51bae274
DM		 1001sub parse_fw_rule {
1002 my ($line, $need_iface, $allow_groups) = @_;
5e1267a5 1003
a332200b 1004 my $macros = get_firewall_macros();
fcba0beb 1005 my $protocols = get_etc_protocols();
51bae274
DM		 1006
1007 my ($action, $iface, $source, $dest, $proto, $dport, $sport);
1008
1009 $line =~ s/#.*$//;
1010
1011 my @data = split(/\s+/, $line);
1012 my $expected_elements = $need_iface ? 7 : 6;
1013
1014 die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1015
1016 if ($need_iface) {
1017 ($action, $iface, $source, $dest, $proto, $dport, $sport) = @data
1018 } else {
1019 ($action, $source, $dest, $proto, $dport, $sport) = @data;
1020 }
1021
1022 die "incomplete rule\n" if !$action;
1023
961b4928
DM		 1024 my $macro;
1025 my $macro_name;
1026
51bae274
DM		 1027 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1028 # OK
1029 } elsif ($allow_groups && $action =~ m/^GROUP-(:?\S+)$/) {
1030 # OK
1031 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
961b4928
DM		 1032 ($macro_name, $action) = ($1, $2);
1033 my $lc_macro_name = lc($macro_name);
1034 my $preferred_name = $pve_fw_preferred_macro_names->{$lc_macro_name};
1035 $macro_name = $preferred_name if $preferred_name;
1036 $macro = $macros->{$lc_macro_name};
1037 die "unknown macro '$macro_name'\n" if !$macro;
51bae274
DM		 1038 } else {
1039 die "unknown action '$action'\n";
1040 }
1041
1042 if ($need_iface) {
1043 $iface = undef if $iface && $iface eq '-';
6158271d 1044 die "unknown interface '$iface'\n"
51bae274
DM		 1045 if defined($iface) && !$valid_netdev_names->{$iface};
1046 }
1047
1048 $proto = undef if $proto && $proto eq '-';
6158271d 1049 die "unknown protokol '$proto'\n" if $proto &&
51bae274
DM		 1050 !(defined($protocols->{byname}->{$proto}) ||
1051 defined($protocols->{byid}->{$proto}));
1052
1053 $source = undef if $source && $source eq '-';
1054 $dest = undef if $dest && $dest eq '-';
1055
1056 $dport = undef if $dport && $dport eq '-';
1057 $sport = undef if $sport && $sport eq '-';
1058
51bae274
DM		 1059 my $nbsource = undef;
1060 my $nbdest = undef;
1061
1062 $nbsource = parse_address_list($source) if $source;
1063 $nbdest = parse_address_list($dest) if $dest;
6158271d 1064
961b4928 1065 my $rules = [];
51bae274 1066
961b4928 1067 my $param = {
51bae274 1068 action => $action,
51bae274
DM		 1069 iface => $iface,
1070 source => $source,
1071 dest => $dest,
1072 nbsource => $nbsource,
1073 nbdest => $nbdest,
1074 proto => $proto,
1075 dport => $dport,
1076 sport => $sport,
51bae274 1077 };
961b4928
DM		 1078
1079 if ($macro) {
1080 foreach my $templ (@$macro) {
1081 my $rule = {};
faf7be7e 1082 my $param_used = {};
961b4928
DM		 1083 foreach my $k (keys %$templ) {
1084 my $v = $templ->{$k};
857f62c8
DM		 1085 if ($v eq 'PARAM') {
1086 $v = $param->{$k};
faf7be7e 1087 $param_used->{$k} = 1;
857f62c8
DM		 1088 } elsif ($v eq 'DEST') {
1089 $v = $param->{dest};
faf7be7e 1090 $param_used->{dest} = 1;
857f62c8
DM		 1091 } elsif ($v eq 'SOURCE') {
1092 $v = $param->{source};
faf7be7e 1093 $param_used->{source} = 1;
857f62c8
DM		 1094 }
1095
961b4928
DM		 1096 die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
1097 $rule->{$k} = $v;
1098 }
faf7be7e
DM		 1099 foreach my $k (keys %$param) {
1100 next if !defined($param->{$k});
1101 next if $param_used->{$k};
1102 if (defined($rule->{$k})) {
1103 die "parameter '$k' already define in macro (value = '$rule->{$k}')\n"
1104 if $rule->{$k} ne $param->{$k};
1105 } else {
1106 $rule->{$k} = $param->{$k};
1107 }
1108 }
961b4928
DM		 1109 push @$rules, $rule;
1110 }
1111 } else {
1112 push @$rules, $param;
1113 }
1114
1115 foreach my $rule (@$rules) {
6158271d 1116 $rule->{nbdport} = parse_port_name_number_or_range($rule->{dport})
961b4928 1117 if defined($rule->{dport});
6158271d 1118 $rule->{nbsport} = parse_port_name_number_or_range($rule->{sport})
961b4928
DM		 1119 if defined($rule->{sport});
1120 }
1121
1122 return $rules;
51bae274
DM		 1123}
1124
85c6eaed
DM		 1125sub parse_fw_option {
1126 my ($line) = @_;
1127
1128 my ($opt, $value);
1129
bee633ab 1130 if ($line =~ m/^(enable|macfilter|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
9c6b6efd
DM		 1131 $opt = lc($1);
1132 $value = int($2);
85c6eaed
DM		 1133 } elsif ($line =~ m/^(policy-(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1134 $opt = lc($1);
1135 $value = uc($3);
9c6b6efd 1136 } else {
85c6eaed
DM		 1137 chomp $line;
1138 die "can't parse option '$line'\n"
1139 }
1140
1141 return ($opt, $value);
1142}
1143
51bae274
DM		 1144sub parse_vm_fw_rules {
1145 my ($filename, $fh) = @_;
1146
85c6eaed 1147 my $res = { in => [], out => [], options => {}};
51bae274
DM		 1148
1149 my $section;
1150
5e1267a5
DM		 1151 while (defined(my $line = <$fh>)) {
1152 next if $line =~ m/^#/;
1153 next if $line =~ m/^\s*$/;
1154
961b4928
DM		 1155 my $linenr = $fh->input_line_number();
1156 my $prefix = "$filename (line $linenr)";
1157
85c6eaed 1158 if ($line =~ m/^\[(\S+)\]\s*$/i) {
5e1267a5 1159 $section = lc($1);
85c6eaed 1160 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
5e1267a5
DM		 1161 next;
1162 }
51bae274 1163 if (!$section) {
961b4928 1164 warn "$prefix: skip line - no section";
5e1267a5
DM		 1165 next;
1166 }
1167
85c6eaed
DM		 1168 next if !$res->{$section}; # skip undefined section
1169
1170 if ($section eq 'options') {
6158271d
DM		 1171 eval {
1172 my ($opt, $value) = parse_fw_option($line);
85c6eaed
DM		 1173 $res->{options}->{$opt} = $value;
1174 };
1175 warn "$prefix: $@" if $@;
1176 next;
1177 }
1178
961b4928
DM		 1179 my $rules;
1180 eval { $rules = parse_fw_rule($line, 1, 1); };
51bae274 1181 if (my $err = $@) {
961b4928 1182 warn "$prefix: $err";
5e1267a5
DM		 1183 next;
1184 }
1185
961b4928 1186 push @{$res->{$section}}, @$rules;
51bae274
DM		 1187 }
1188
1189 return $res;
1190}
1191
1192sub parse_host_fw_rules {
1193 my ($filename, $fh) = @_;
1194
1195 my $res = { in => [], out => [] };
1196
1197 my $section;
1198
1199 while (defined(my $line = <$fh>)) {
1200 next if $line =~ m/^#/;
1201 next if $line =~ m/^\s*$/;
1202
961b4928
DM		 1203 my $linenr = $fh->input_line_number();
1204 my $prefix = "$filename (line $linenr)";
1205
51bae274
DM		 1206 if ($line =~ m/^\[(in|out)\]\s*$/i) {
1207 $section = lc($1);
5e1267a5
DM		 1208 next;
1209 }
51bae274 1210 if (!$section) {
961b4928 1211 warn "$prefix: skip line - no section";
5e1267a5
DM		 1212 next;
1213 }
1214
961b4928
DM		 1215 my $rules;
1216 eval { $rules = parse_fw_rule($line, 1, 1); };
ecbea048 1217 if (my $err = $@) {
961b4928 1218 warn "$prefix: $err";
ecbea048 1219 next;
ecbea048
DM		 1220 }
1221
961b4928 1222 push @{$res->{$section}}, @$rules;
51bae274 1223 }
ecbea048 1224
51bae274
DM		 1225 return $res;
1226}
4cdbb3b7 1227
51bae274
DM		 1228sub parse_group_fw_rules {
1229 my ($filename, $fh) = @_;
5e1267a5 1230
51bae274
DM		 1231 my $section;
1232 my $group;
1233
1234 my $res = { in => [], out => [] };
6158271d 1235
51bae274
DM		 1236 while (defined(my $line = <$fh>)) {
1237 next if $line =~ m/^#/;
1238 next if $line =~ m/^\s*$/;
1239
961b4928
DM		 1240 my $linenr = $fh->input_line_number();
1241 my $prefix = "$filename (line $linenr)";
1242
51bae274
DM		 1243 if ($line =~ m/^\[(in|out):(\S+)\]\s*$/i) {
1244 $section = lc($1);
1245 $group = lc($2);
1246 next;
1247 }
1248 if (!$section || !$group) {
961b4928 1249 warn "$prefix: skip line - no section";
51bae274
DM		 1250 next;
1251 }
1252
961b4928
DM		 1253 my $rules;
1254 eval { $rules = parse_fw_rule($line, 0, 0); };
51bae274 1255 if (my $err = $@) {
961b4928 1256 warn "$prefix: $err";
51bae274
DM		 1257 next;
1258 }
1259
961b4928 1260 push @{$res->{$group}->{$section}}, @$rules;
5e1267a5
DM		 1261 }
1262
1263 return $res;
1264}
1265
06320eb0
DM		 1266sub run_locked {
1267 my ($code, @param) = @_;
1268
1269 my $timeout = 10;
1270
1271 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
1272
1273 die $@ if $@;
1274
1275 return $res;
1276}
1277
5e1267a5
DM		 1278sub read_local_vm_config {
1279
1280 my $openvz = {};
1281
1282 my $qemu = {};
1283
1284 my $list = PVE::QemuServer::config_list();
1285
1286 foreach my $vmid (keys %$list) {
5e1267a5
DM		 1287 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
1288 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1289 $qemu->{$vmid} = $conf;
1290 }
1291 }
1292
1293 my $vmdata = { openvz => $openvz, qemu => $qemu };
1294
1295 return $vmdata;
1296};
1297
1298sub read_vm_firewall_rules {
1299 my ($vmdata) = @_;
1300 my $rules = {};
1301 foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
1302 my $filename = "/etc/pve/firewall/$vmid.fw";
1303 my $fh = IO::File->new($filename, O_RDONLY);
1304 next if !$fh;
1305
51bae274 1306 $rules->{$vmid} = parse_vm_fw_rules($filename, $fh);
5e1267a5
DM		 1307 }
1308
1309 return $rules;
1310}
1311
d8f2505e
DM		 1312sub generate_std_chains {
1313 my ($ruleset) = @_;
1314
1315 foreach my $chain (keys %$pve_std_chains) {
1316 ruleset_create_chain($ruleset, $chain);
1317 foreach my $rule (@{$pve_std_chains->{$chain}}) {
1318 if (ref($rule)) {
1319 ruleset_generate_rule($ruleset, $chain, $rule);
1320 } else {
1321 ruleset_addrule($ruleset, $chain, $rule);
1322 }
1323 }
1324 }
1325}
1326
5e1267a5 1327sub compile {
5e1267a5
DM		 1328 my $vmdata = read_local_vm_config();
1329 my $rules = read_vm_firewall_rules($vmdata);
6158271d 1330
51bae274
DM		 1331 my $group_rules = {};
1332 my $filename = "/etc/pve/firewall/groups.fw";
1333 if (my $fh = IO::File->new($filename, O_RDONLY)) {
1334 $group_rules = parse_group_fw_rules($filename, $fh);
1335 }
5e1267a5 1336
3fa83edf
DM		 1337 #print Dumper($rules);
1338
1339 my $ruleset = {};
1340
dec84fcd
DM		 1341 ruleset_create_chain($ruleset, "PVEFW-INPUT");
1342 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
fadb13dd 1343 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3fa83edf 1344
d8f2505e 1345 generate_std_chains($ruleset);
4e6112f9 1346
fadb13dd 1347 my $enable_hostfw = 0;
51bae274
DM		 1348 $filename = "/etc/pve/local/host.fw";
1349 if (my $fh = IO::File->new($filename, O_RDONLY)) {
1350 my $host_rules = parse_host_fw_rules($filename, $fh);
fadb13dd
DM		 1351
1352 $enable_hostfw = 1;
1353
51bae274
DM		 1354 enablehostfw($ruleset, $host_rules, $group_rules);
1355 }
3fa83edf 1356
6158271d 1357 # generate firewall rules for QEMU VMs
3fa83edf
DM		 1358 foreach my $vmid (keys %{$vmdata->{qemu}}) {
1359 my $conf = $vmdata->{qemu}->{$vmid};
fa9c4a6f
DM		 1360 my $vmfw_conf = $rules->{$vmid};
1361 next if !$vmfw_conf;
1362 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
3fa83edf
DM		 1363
1364 foreach my $netid (keys %$conf) {
1365 next if $netid !~ m/^net(\d+)$/;
1366 my $net = PVE::QemuServer::parse_net($conf->{$netid});
1367 next if !$net;
1368 my $iface = "tap${vmid}i$1";
5e1267a5 1369
3fa83edf
DM		 1370 my $bridge = $net->{bridge};
1371 next if !$bridge; # fixme: ?
1372
1373 $bridge .= "v$net->{tag}" if $net->{tag};
1374
fadb13dd 1375
3fa83edf
DM		 1376 generate_bridge_chains($ruleset, $bridge);
1377
c29f55c9 1378 my $macaddr = $net->{macaddr};
fa9c4a6f
DM		 1379 generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'IN');
1380 generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'OUT');
3fa83edf
DM		 1381 }
1382 }
c0413e35 1383
fadb13dd
DM		 1384 if ($enable_hostfw) {
1385 # allow traffic from lo (ourself)
1386 ruleset_addrule($ruleset, "PVEFW-INPUT", "-i lo -j ACCEPT");
1387 }
c0413e35 1388
3fa83edf
DM		 1389 return $ruleset;
1390}
1391
1392sub get_ruleset_status {
1393 my ($ruleset, $verbose) = @_;
1394
1395 my $active_chains = iptables_get_chains();
1396
1397 my $statushash = {};
1398
1399 foreach my $chain (sort keys %$ruleset) {
09d5f68e 1400 my $digest = Digest::SHA->new('sha1');
3fa83edf
DM		 1401 foreach my $cmd (@{$ruleset->{$chain}}) {
1402 $digest->add("$cmd\n");
1403 }
1404 my $sig = $digest->b64digest;
1405 $statushash->{$chain}->{sig} = $sig;
1406
1407 my $oldsig = $active_chains->{$chain};
1408 if (!defined($oldsig)) {
1409 $statushash->{$chain}->{action} = 'create';
1410 } else {
1411 if ($oldsig eq $sig) {
1412 $statushash->{$chain}->{action} = 'exists';
1413 } else {
1414 $statushash->{$chain}->{action} = 'update';
1415 }
1416 }
1417 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
1418 foreach my $cmd (@{$ruleset->{$chain}}) {
1419 print "\t$cmd\n" if $verbose;
1420 }
1421 }
1422
1423 foreach my $chain (sort keys %$active_chains) {
1424 if (!defined($ruleset->{$chain})) {
1425 my $sig = $active_chains->{$chain};
1426 $statushash->{$chain}->{action} = 'delete';
1427 $statushash->{$chain}->{sig} = $sig;
1428 print "delete $chain ($sig)\n" if $verbose;
1429 }
6158271d 1430 }
3fa83edf
DM		 1431
1432 return $statushash;
1433}
1434
1435sub print_ruleset {
1436 my ($ruleset) = @_;
1437
1438 get_ruleset_status($ruleset, 1);
1439}
1440
1441sub print_sig_rule {
1442 my ($chain, $sig) = @_;
1443
09d5f68e
DM		 1444 # We just use this to store a SHA1 checksum used to detect changes
1445 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
b6360c3f
DM		 1446}
1447
a84f4d96
DM		 1448sub apply_ruleset {
1449 my ($ruleset, $verbose) = @_;
3fa83edf 1450
a84f4d96 1451 enable_bridge_firewall();
3fa83edf
DM		 1452
1453 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
1454
1455 my $statushash = get_ruleset_status($ruleset, $verbose);
1456
1457 # create missing chains first
1458 foreach my $chain (sort keys %$ruleset) {
1459 my $stat = $statushash->{$chain};
1460 die "internal error" if !$stat;
1461 next if $stat->{action} ne 'create';
886aba9c 1462
3fa83edf
DM		 1463 $cmdlist .= ":$chain - [0:0]\n";
1464 }
1465
dec84fcd 1466 my $rule = "INPUT -j PVEFW-INPUT";
3fa83edf
DM		 1467 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1468 $cmdlist .= "-A $rule\n";
1469 }
dec84fcd 1470 $rule = "OUTPUT -j PVEFW-OUTPUT";
3fa83edf
DM		 1471 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1472 $cmdlist .= "-A $rule\n";
1473 }
1474
dec84fcd 1475 $rule = "FORWARD -j PVEFW-FORWARD";
3fa83edf
DM		 1476 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1477 $cmdlist .= "-A $rule\n";
1478 }
1479
1480 foreach my $chain (sort keys %$ruleset) {
1481 my $stat = $statushash->{$chain};
1482 die "internal error" if !$stat;
1483
1484 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
1485 $cmdlist .= "-F $chain\n";
1486 foreach my $cmd (@{$ruleset->{$chain}}) {
1487 $cmdlist .= "$cmd\n";
1488 }
1489 $cmdlist .= print_sig_rule($chain, $stat->{sig});
1490 } elsif ($stat->{action} eq 'delete') {
f5d28682 1491 die "internal error"; # this should not happen
3fa83edf
DM		 1492 } elsif ($stat->{action} eq 'exists') {
1493 # do nothing
1494 } else {
1495 die "internal error - unknown status '$stat->{action}'";
1496 }
1497 }
1498
f5d28682
DM		 1499 foreach my $chain (keys %$statushash) {
1500 next if $statushash->{$chain}->{action} ne 'delete';
1501 $cmdlist .= "-F $chain\n";
1502 }
1503 foreach my $chain (keys %$statushash) {
1504 next if $statushash->{$chain}->{action} ne 'delete';
fadb13dd
DM		 1505 next if $chain eq 'PVEFW-INPUT';
1506 next if $chain eq 'PVEFW-OUTPUT';
1507 next if $chain eq 'PVEFW-FORWARD';
f5d28682
DM		 1508 $cmdlist .= "-X $chain\n";
1509 }
1510
3fa83edf
DM		 1511 $cmdlist .= "COMMIT\n";
1512
1513 print $cmdlist if $verbose;
1514
1515 iptables_restore_cmdlist($cmdlist);
1516
6158271d 1517 # test: re-read status and check if everything is up to date
3fa83edf
DM		 1518 $statushash = get_ruleset_status($ruleset);
1519
1520 my $errors;
1521 foreach my $chain (sort keys %$ruleset) {
1522 my $stat = $statushash->{$chain};
1523 if ($stat->{action} ne 'exists') {
1524 warn "unable to update chain '$chain'\n";
1525 $errors = 1;
1526 }
1527 }
b6360c3f 1528
3fa83edf 1529 die "unable to apply firewall changes\n" if $errors;
b6360c3f
DM		 1530}
1531
b6360c3f 15321;
Firewall test scripts