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dhcp out rule : use goto instead jump
[pve-firewall.git] / src / PVE / Firewall.pm
CommitLineData
b6360c3f
DM		 1package PVE::Firewall;
2
3use warnings;
4use strict;
5use Data::Dumper;
09d5f68e 6use Digest::SHA;
c8301d63
DM		 7use PVE::INotify;
8use PVE::Cluster;
5f0a912c 9use PVE::ProcFSTools;
f789653a 10use PVE::Tools;
6b9f68a2 11use File::Basename;
5e1267a5
DM		 12use File::Path;
13use IO::File;
ecbea048 14use Net::IP;
06320eb0 15use PVE::Tools qw(run_command lock_file);
30c1ae52 16use Encode;
ecbea048 17
d9fee004
DM		 18# dynamically include PVE::QemuServer and PVE::OpenVZ
19# to avoid dependency problems
20my $have_qemu_server;
21eval {
22 require PVE::QemuServer;
23 $have_qemu_server = 1;
24};
25
26my $have_pve_manager;
27eval {
28 require PVE::OpenVZ;
29 $have_pve_manager = 1;
30};
31
5e1267a5 32use Data::Dumper;
b6360c3f 33
c8301d63
DM		 34my $nodename = PVE::INotify::nodename();
35
06320eb0 36my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
6b9f68a2 37my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
06320eb0 38
2d404ffc
DM		 39my $default_log_level = 'info';
40
41my $log_level_hash = {
42 debug => 7,
43 info => 6,
44 notice => 5,
45 warning => 4,
46 err => 3,
47 crit => 2,
48 alert => 1,
49 emerg => 0,
50};
51
857f62c8 52# imported/converted from: /usr/share/shorewall/macro.*
961b4928 53my $pve_fw_macros = {
857f62c8
DM		 54 'Amanda' => [
55 { action => 'PARAM', proto => 'udp', dport => '10080' },
56 { action => 'PARAM', proto => 'tcp', dport => '10080' },
57 ],
58 'Auth' => [
59 { action => 'PARAM', proto => 'tcp', dport => '113' },
60 ],
61 'BGP' => [
62 { action => 'PARAM', proto => 'tcp', dport => '179' },
63 ],
64 'BitTorrent' => [
961b4928 65 { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
857f62c8
DM		 66 { action => 'PARAM', proto => 'udp', dport => '6881' },
67 ],
68 'BitTorrent32' => [
69 { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
70 { action => 'PARAM', proto => 'udp', dport => '6881' },
71 ],
72 'CVS' => [
73 { action => 'PARAM', proto => 'tcp', dport => '2401' },
74 ],
75 'Citrix' => [
76 { action => 'PARAM', proto => 'tcp', dport => '1494' },
77 { action => 'PARAM', proto => 'udp', dport => '1604' },
78 { action => 'PARAM', proto => 'tcp', dport => '2598' },
79 ],
80 'DAAP' => [
81 { action => 'PARAM', proto => 'tcp', dport => '3689' },
82 { action => 'PARAM', proto => 'udp', dport => '3689' },
83 ],
84 'DCC' => [
85 { action => 'PARAM', proto => 'tcp', dport => '6277' },
86 ],
87 'DHCPfwd' => [
88 { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
89 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' },
90 ],
91 'DNS' => [
92 { action => 'PARAM', proto => 'udp', dport => '53' },
93 { action => 'PARAM', proto => 'tcp', dport => '53' },
94 ],
95 'Distcc' => [
96 { action => 'PARAM', proto => 'tcp', dport => '3632' },
97 ],
98 'Edonkey' => [
99 { action => 'PARAM', proto => 'tcp', dport => '4662' },
100 { action => 'PARAM', proto => 'udp', dport => '4665' },
961b4928 101 ],
857f62c8
DM		 102 'FTP' => [
103 { action => 'PARAM', proto => 'tcp', dport => '21' },
104 ],
105 'Finger' => [
106 { action => 'PARAM', proto => 'tcp', dport => '79' },
107 ],
108 'GNUnet' => [
109 { action => 'PARAM', proto => 'tcp', dport => '2086' },
110 { action => 'PARAM', proto => 'udp', dport => '2086' },
111 { action => 'PARAM', proto => 'tcp', dport => '1080' },
112 { action => 'PARAM', proto => 'udp', dport => '1080' },
113 ],
114 'GRE' => [
115 { action => 'PARAM', proto => '47' },
116 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
117 ],
118 'Git' => [
119 { action => 'PARAM', proto => 'tcp', dport => '9418' },
120 ],
121 'Gnutella' => [
122 { action => 'PARAM', proto => 'tcp', dport => '6346' },
123 { action => 'PARAM', proto => 'udp', dport => '6346' },
124 ],
125 'HKP' => [
126 { action => 'PARAM', proto => 'tcp', dport => '11371' },
127 ],
128 'HTTP' => [
961b4928
DM		 129 { action => 'PARAM', proto => 'tcp', dport => '80' },
130 ],
857f62c8
DM		 131 'HTTPS' => [
132 { action => 'PARAM', proto => 'tcp', dport => '443' },
133 ],
134 'ICPV2' => [
135 { action => 'PARAM', proto => 'udp', dport => '3130' },
136 ],
137 'ICQ' => [
138 { action => 'PARAM', proto => 'tcp', dport => '5190' },
139 ],
140 'IMAP' => [
141 { action => 'PARAM', proto => 'tcp', dport => '143' },
142 ],
143 'IMAPS' => [
144 { action => 'PARAM', proto => 'tcp', dport => '993' },
145 ],
146 'IPIP' => [
147 { action => 'PARAM', proto => '94' },
148 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' },
149 ],
150 'IPP' => [
151 { action => 'PARAM', proto => 'tcp', dport => '631' },
152 ],
153 'IPPbrd' => [
154 { action => 'PARAM', proto => 'udp', dport => '631' },
155 ],
156 'IPPserver' => [
157 { action => 'PARAM', source => 'SOURCE', dest => 'DEST', proto => 'tcp', dport => '631' },
158 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '631' },
159 ],
160 'IPsec' => [
161 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
162 { action => 'PARAM', proto => '50' },
163 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
164 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
165 ],
166 'IPsecah' => [
167 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
168 { action => 'PARAM', proto => '51' },
169 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
170 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' },
171 ],
172 'IPsecnat' => [
173 { action => 'PARAM', proto => 'udp', dport => '500' },
174 { action => 'PARAM', proto => 'udp', dport => '4500' },
175 { action => 'PARAM', proto => '50' },
176 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' },
177 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' },
178 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
179 ],
180 'IRC' => [
181 { action => 'PARAM', proto => 'tcp', dport => '6667' },
182 ],
183 'JabberPlain' => [
184 { action => 'PARAM', proto => 'tcp', dport => '5222' },
185 ],
186 'JabberSecure' => [
187 { action => 'PARAM', proto => 'tcp', dport => '5223' },
188 ],
189 'Jabberd' => [
190 { action => 'PARAM', proto => 'tcp', dport => '5269' },
191 ],
192 'Jetdirect' => [
193 { action => 'PARAM', proto => 'tcp', dport => '9100' },
194 ],
195 'L2TP' => [
196 { action => 'PARAM', proto => 'udp', dport => '1701' },
197 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' },
198 ],
199 'LDAP' => [
200 { action => 'PARAM', proto => 'tcp', dport => '389' },
201 ],
202 'LDAPS' => [
203 { action => 'PARAM', proto => 'tcp', dport => '636' },
204 ],
205 'MSNP' => [
206 { action => 'PARAM', proto => 'tcp', dport => '1863' },
207 ],
208 'MSSQL' => [
209 { action => 'PARAM', proto => 'tcp', dport => '1433' },
210 ],
211 'Mail' => [
212 { action => 'PARAM', proto => 'tcp', dport => '25' },
213 { action => 'PARAM', proto => 'tcp', dport => '465' },
214 { action => 'PARAM', proto => 'tcp', dport => '587' },
215 ],
216 'Munin' => [
217 { action => 'PARAM', proto => 'tcp', dport => '4949' },
218 ],
219 'MySQL' => [
220 { action => 'PARAM', proto => 'tcp', dport => '3306' },
221 ],
222 'NNTP' => [
223 { action => 'PARAM', proto => 'tcp', dport => '119' },
224 ],
225 'NNTPS' => [
226 { action => 'PARAM', proto => 'tcp', dport => '563' },
227 ],
228 'NTP' => [
229 { action => 'PARAM', proto => 'udp', dport => '123' },
230 ],
231 'NTPbi' => [
232 { action => 'PARAM', proto => 'udp', dport => '123' },
233 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' },
234 ],
235 'NTPbrd' => [
236 { action => 'PARAM', proto => 'udp', dport => '123' },
237 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '123' },
238 ],
239 'OSPF' => [
240 { action => 'PARAM', proto => '89' },
241 ],
242 'OpenVPN' => [
243 { action => 'PARAM', proto => 'udp', dport => '1194' },
244 ],
245 'PCA' => [
246 { action => 'PARAM', proto => 'udp', dport => '5632' },
247 { action => 'PARAM', proto => 'tcp', dport => '5631' },
248 ],
249 'POP3' => [
250 { action => 'PARAM', proto => 'tcp', dport => '110' },
251 ],
252 'POP3S' => [
253 { action => 'PARAM', proto => 'tcp', dport => '995' },
254 ],
255 'PPtP' => [
256 { action => 'PARAM', proto => '47' },
257 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
258 { action => 'PARAM', proto => 'tcp', dport => '1723' },
259 ],
260 'Ping' => [
269d4f13 261 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
857f62c8
DM		 262 ],
263 'PostgreSQL' => [
264 { action => 'PARAM', proto => 'tcp', dport => '5432' },
265 ],
266 'Printer' => [
267 { action => 'PARAM', proto => 'tcp', dport => '515' },
268 ],
269 'RDP' => [
270 { action => 'PARAM', proto => 'tcp', dport => '3389' },
271 ],
272 'RIPbi' => [
273 { action => 'PARAM', proto => 'udp', dport => '520' },
274 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' },
275 ],
276 'RNDC' => [
277 { action => 'PARAM', proto => 'tcp', dport => '953' },
278 ],
279 'Razor' => [
280 { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
281 ],
282 'Rdate' => [
283 { action => 'PARAM', proto => 'tcp', dport => '37' },
284 ],
285 'Rsync' => [
286 { action => 'PARAM', proto => 'tcp', dport => '873' },
287 ],
288 'SANE' => [
289 { action => 'PARAM', proto => 'tcp', dport => '6566' },
290 ],
291 'SMB' => [
292 { action => 'PARAM', proto => 'udp', dport => '135,445' },
293 { action => 'PARAM', proto => 'udp', dport => '137:139' },
294 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
295 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
296 ],
297 'SMBBI' => [
298 { action => 'PARAM', proto => 'udp', dport => '135,445' },
299 { action => 'PARAM', proto => 'udp', dport => '137:139' },
300 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
301 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
302 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' },
303 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' },
304 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' },
305 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' },
306 ],
307 'SMBswat' => [
308 { action => 'PARAM', proto => 'tcp', dport => '901' },
309 ],
310 'SMTP' => [
311 { action => 'PARAM', proto => 'tcp', dport => '25' },
312 ],
313 'SMTPS' => [
314 { action => 'PARAM', proto => 'tcp', dport => '465' },
315 ],
316 'SNMP' => [
317 { action => 'PARAM', proto => 'udp', dport => '161:162' },
318 { action => 'PARAM', proto => 'tcp', dport => '161' },
319 ],
320 'SPAMD' => [
321 { action => 'PARAM', proto => 'tcp', dport => '783' },
322 ],
323 'SSH' => [
324 { action => 'PARAM', proto => 'tcp', dport => '22' },
325 ],
326 'SVN' => [
327 { action => 'PARAM', proto => 'tcp', dport => '3690' },
328 ],
329 'SixXS' => [
330 { action => 'PARAM', proto => 'tcp', dport => '3874' },
331 { action => 'PARAM', proto => 'udp', dport => '3740' },
332 { action => 'PARAM', proto => '41' },
333 { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
334 ],
335 'Squid' => [
336 { action => 'PARAM', proto => 'tcp', dport => '3128' },
337 ],
338 'Submission' => [
339 { action => 'PARAM', proto => 'tcp', dport => '587' },
340 ],
341 'Syslog' => [
342 { action => 'PARAM', proto => 'udp', dport => '514' },
343 { action => 'PARAM', proto => 'tcp', dport => '514' },
344 ],
345 'TFTP' => [
346 { action => 'PARAM', proto => 'udp', dport => '69' },
347 ],
348 'Telnet' => [
349 { action => 'PARAM', proto => 'tcp', dport => '23' },
350 ],
351 'Telnets' => [
352 { action => 'PARAM', proto => 'tcp', dport => '992' },
353 ],
354 'Time' => [
355 { action => 'PARAM', proto => 'tcp', dport => '37' },
356 ],
357 'Trcrt' => [
358 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
269d4f13 359 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
857f62c8
DM		 360 ],
361 'VNC' => [
362 { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
363 ],
364 'VNCL' => [
365 { action => 'PARAM', proto => 'tcp', dport => '5500' },
366 ],
367 'Web' => [
368 { action => 'PARAM', proto => 'tcp', dport => '80' },
961b4928
DM		 369 { action => 'PARAM', proto => 'tcp', dport => '443' },
370 ],
857f62c8
DM		 371 'Webcache' => [
372 { action => 'PARAM', proto => 'tcp', dport => '8080' },
373 ],
374 'Webmin' => [
375 { action => 'PARAM', proto => 'tcp', dport => '10000' },
376 ],
377 'Whois' => [
378 { action => 'PARAM', proto => 'tcp', dport => '43' },
379 ],
961b4928
DM		 380};
381
382my $pve_fw_parsed_macros;
383my $pve_fw_preferred_macro_names = {};
3a616aa0 384
d8f2505e
DM		 385my $pve_std_chains = {
386 'PVEFW-SET-ACCEPT-MARK' => [
387 "-j MARK --set-mark 1",
388 ],
79929d9c
DM		 389 'PVEFW-DropBroadcast' => [
390 # same as shorewall 'Broadcast'
391 # simply DROP BROADCAST/MULTICAST/ANYCAST
392 # we can use this to reduce logging
393 { action => 'DROP', dsttype => 'BROADCAST' },
394 { action => 'DROP', dsttype => 'MULTICAST' },
395 { action => 'DROP', dsttype => 'ANYCAST' },
396 { action => 'DROP', dest => '224.0.0.0/4' },
397 ],
398 'PVEFW-reject' => [
399 # same as shorewall 'reject'
400 { action => 'DROP', dsttype => 'BROADCAST' },
401 { action => 'DROP', source => '224.0.0.0/4' },
402 { action => 'DROP', proto => 'icmp' },
403 "-p tcp -j REJECT --reject-with tcp-reset",
404 "-p udp -j REJECT --reject-with icmp-port-unreachable",
405 "-p icmp -j REJECT --reject-with icmp-host-unreachable",
406 "-j REJECT --reject-with icmp-host-prohibited",
407 ],
408 'PVEFW-Drop' => [
409 # same as shorewall 'Drop', which is equal to DROP,
410 # but REJECT/DROP some packages to reduce logging,
411 # and ACCEPT critical ICMP types
412 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
413 # we are not interested in BROADCAST/MULTICAST/ANYCAST
414 { action => 'PVEFW-DropBroadcast' },
415 # ACCEPT critical ICMP types
416 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
417 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
418 # Drop packets with INVALID state
419 "-m conntrack --ctstate INVALID -j DROP",
420 # Drop Microsoft SMB noise
421 { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
422 { action => 'DROP', proto => 'udp', dport => '137:139'},
423 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
424 { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
425 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
426 # Drop new/NotSyn traffic so that it doesn't get logged
427 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
428 # Drop DNS replies
429 { action => 'DROP', proto => 'udp', sport => 53 },
430 ],
431 'PVEFW-Reject' => [
432 # same as shorewall 'Reject', which is equal to Reject,
433 # but REJECT/DROP some packages to reduce logging,
434 # and ACCEPT critical ICMP types
435 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
436 # we are not interested in BROADCAST/MULTICAST/ANYCAST
437 { action => 'PVEFW-DropBroadcast' },
438 # ACCEPT critical ICMP types
439 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
440 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
441 # Drop packets with INVALID state
442 "-m conntrack --ctstate INVALID -j DROP",
443 # Drop Microsoft SMB noise
444 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
445 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
446 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
447 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
448 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
449 # Drop new/NotSyn traffic so that it doesn't get logged
450 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
451 # Drop DNS replies
452 { action => 'DROP', proto => 'udp', sport => 53 },
453 ],
d86659ef
DM		 454 'PVEFW-tcpflags' => [
455 # same as shorewall tcpflags action.
456 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
457 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
458 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
459 "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
460 "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
461 "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
462 ],
bee633ab
DM		 463 'PVEFW-smurfs' => [
464 # same as shorewall smurfs action
465 # Filter packets for smurfs (packets with a broadcast address as the source).
466 "-s 0.0.0.0/32 -j RETURN",
467 "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
468 "-s 224.0.0.0/4 -g PVEFW-smurflog",
469 ],
d8f2505e
DM		 470};
471
4b586518
DM		 472# iptables -p icmp -h
473my $icmp_type_names = {
474 any => 1,
475 'echo-reply' => 1,
476 'destination-unreachable' => 1,
477 'network-unreachable' => 1,
478 'host-unreachable' => 1,
479 'protocol-unreachable' => 1,
480 'port-unreachable' => 1,
481 'fragmentation-needed' => 1,
482 'source-route-failed' => 1,
483 'network-unknown' => 1,
484 'host-unknown' => 1,
485 'network-prohibited' => 1,
486 'host-prohibited' => 1,
487 'TOS-network-unreachable' => 1,
488 'TOS-host-unreachable' => 1,
489 'communication-prohibited' => 1,
490 'host-precedence-violation' => 1,
491 'precedence-cutoff' => 1,
492 'source-quench' => 1,
493 'redirect' => 1,
494 'network-redirect' => 1,
495 'host-redirect' => 1,
496 'TOS-network-redirect' => 1,
497 'TOS-host-redirect' => 1,
498 'echo-request' => 1,
499 'router-advertisement' => 1,
500 'router-solicitation' => 1,
501 'time-exceeded' => 1,
502 'ttl-zero-during-transit' => 1,
503 'ttl-zero-during-reassembly' => 1,
504 'parameter-problem' => 1,
505 'ip-header-bad' => 1,
506 'required-option-missing' => 1,
507 'timestamp-request' => 1,
508 'timestamp-reply' => 1,
509 'address-mask-request' => 1,
510 'address-mask-reply' => 1,
511};
512
a332200b 513sub get_firewall_macros {
9aab3127 514
961b4928 515 return $pve_fw_parsed_macros if $pve_fw_parsed_macros;
6158271d 516
961b4928 517 $pve_fw_parsed_macros = {};
9aab3127 518
961b4928
DM		 519 foreach my $k (keys %$pve_fw_macros) {
520 my $name = lc($k);
a332200b 521
961b4928
DM		 522 my $macro = $pve_fw_macros->{$k};
523 $pve_fw_preferred_macro_names->{$name} = $k;
524 $pve_fw_parsed_macros->{$name} = $macro;
525 }
a332200b 526
961b4928 527 return $pve_fw_parsed_macros;
9aab3127
DM		 528}
529
fcba0beb
DM		 530my $etc_services;
531
532sub get_etc_services {
533
534 return $etc_services if $etc_services;
535
536 my $filename = "/etc/services";
537
538 my $fh = IO::File->new($filename, O_RDONLY);
539 if (!$fh) {
540 warn "unable to read '$filename' - $!\n";
541 return {};
542 }
543
544 my $services = {};
545
546 while (my $line = <$fh>) {
547 chomp ($line);
548 next if $line =~m/^#/;
549 next if ($line =~m/^\s*$/);
550
551 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
552 $services->{byid}->{$2}->{name} = $1;
35b66e9d 553 $services->{byid}->{$2}->{port} = $2;
fcba0beb
DM		 554 $services->{byid}->{$2}->{$3} = 1;
555 $services->{byname}->{$1} = $services->{byid}->{$2};
556 }
557 }
558
559 close($fh);
560
6158271d
DM		 561 $etc_services = $services;
562
3a616aa0 563
fcba0beb
DM		 564 return $etc_services;
565}
566
567my $etc_protocols;
568
569sub get_etc_protocols {
570 return $etc_protocols if $etc_protocols;
571
572 my $filename = "/etc/protocols";
573
574 my $fh = IO::File->new($filename, O_RDONLY);
575 if (!$fh) {
576 warn "unable to read '$filename' - $!\n";
577 return {};
578 }
579
580 my $protocols = {};
581
582 while (my $line = <$fh>) {
583 chomp ($line);
584 next if $line =~m/^#/;
585 next if ($line =~m/^\s*$/);
586
587 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
588 $protocols->{byid}->{$2}->{name} = $1;
589 $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
590 }
591 }
592
593 close($fh);
594
595 $etc_protocols = $protocols;
596
597 return $etc_protocols;
598}
599
ecbea048
DM		 600sub parse_address_list {
601 my ($str) = @_;
602
d6de1dc2 603 my $nbaor = 0;
ecbea048
DM		 604 foreach my $aor (split(/,/, $str)) {
605 if (!Net::IP->new($aor)) {
606 my $err = Net::IP::Error();
607 die "invalid IP address: $err\n";
d6de1dc2
AD		 608 }else{
609 $nbaor++;
ecbea048
DM		 610 }
611 }
d6de1dc2 612 return $nbaor;
ecbea048 613}
dddd9413 614
fcba0beb
DM		 615sub parse_port_name_number_or_range {
616 my ($str) = @_;
617
618 my $services = PVE::Firewall::get_etc_services();
4cdbb3b7 619 my $nbports = 0;
fcba0beb 620 foreach my $item (split(/,/, $str)) {
4cdbb3b7 621 my $portlist = "";
35b66e9d 622 my $oldpon = undef;
4b586518 623 $nbports++;
fcba0beb 624 foreach my $pon (split(':', $item, 2)) {
35b66e9d 625 $pon = $services->{byname}->{$pon}->{port} if $services->{byname}->{$pon}->{port};
4cdbb3b7 626 if ($pon =~ m/^\d+$/){
857f62c8 627 die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535;
35b66e9d
AD		 628 die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon);
629 $oldpon = $pon;
4cdbb3b7
AD		 630 }else{
631 die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon};
632 }
fcba0beb
DM		 633 }
634 }
635
4cdbb3b7 636 return ($nbports);
fcba0beb
DM		 637}
638
d1c53b3e
DM		 639# helper function for API
640sub cleanup_fw_rule {
641 my ($rule, $digest, $pos) = @_;
642
643 my $r = {};
644
645 foreach my $k (keys %$rule) {
646 next if $k eq 'nbdport';
647 next if $k eq 'nbsport';
648 my $v = $rule->{$k};
649 next if !defined($v);
650 $r->{$k} = $v;
651 $r->{digest} = $digest;
652 $r->{pos} = $pos;
653 }
654
655 return $r;
656}
657
780bcc0f
DM		 658my $bridge_firewall_enabled = 0;
659
660sub enable_bridge_firewall {
661
662 return if $bridge_firewall_enabled; # only once
663
5f0a912c
DM		 664 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
665 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
780bcc0f 666
6a8a75db
DM		 667 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
668 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
669
780bcc0f
DM		 670 $bridge_firewall_enabled = 1;
671}
672
8cebfa6f 673my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
dddd9413 674
3a616aa0
AD		 675sub iptables {
676 my ($cmd) = @_;
677
678 run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {});
679}
680
b16e818e
DM		 681sub iptables_restore_cmdlist {
682 my ($cmdlist) = @_;
3a616aa0 683
3fa83edf 684 run_command("/sbin/iptables-restore -n", input => $cmdlist);
3a616aa0
AD		 685}
686
de2a57cd
DM		 687sub iptables_get_chains {
688
689 my $res = {};
690
691 # check what chains we want to track
692 my $is_pvefw_chain = sub {
693 my $name = shift;
694
dec84fcd
DM		 695 return 1 if $name =~ m/^PVEFW-\S+$/;
696
de2a57cd 697 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
954f24b1
DM		 698
699 return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
700
9e15114a
DM		 701 return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
702
5927497d 703 return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT)$/;
f50656c2 704 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
de2a57cd
DM		 705
706 return undef;
707 };
708
709 my $table = '';
710
de2a57cd
DM		 711 my $parser = sub {
712 my $line = shift;
713
714 return if $line =~ m/^#/;
715 return if $line =~ m/^\s*$/;
716
717 if ($line =~ m/^\*(\S+)$/) {
718 $table = $1;
719 return;
720 }
721
722 return if $table ne 'filter';
723
724 if ($line =~ m/^:(\S+)\s/) {
725 my $chain = $1;
726 return if !&$is_pvefw_chain($chain);
3fa83edf 727 $res->{$chain} = "unknown";
09d5f68e 728 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
3fa83edf 729 my ($chain, $sig) = ($1, $2);
de2a57cd 730 return if !&$is_pvefw_chain($chain);
3fa83edf 731 $res->{$chain} = $sig;
de2a57cd
DM		 732 } else {
733 # simply ignore the rest
734 return;
735 }
736 };
737
738 run_command("/sbin/iptables-save", outfunc => $parser);
739
de2a57cd
DM		 740 return $res;
741}
742
3a616aa0
AD		 743sub iptables_chain_exist {
744 my ($chain) = @_;
745
746 eval{
747 iptables("-n --list $chain");
748 };
749 return undef if $@;
750
751 return 1;
752}
753
754sub iptables_rule_exist {
755 my ($rule) = @_;
756
757 eval{
758 iptables("-C $rule");
759 };
760 return undef if $@;
761
762 return 1;
763}
764
eba0fb64 765sub ruleset_generate_cmdstr {
2f906466 766 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
3a616aa0 767
ea9e5116 768 return if !$rule->{enable};
11bac5c2 769
41524a58 770 my @cmd = ();
3a616aa0 771
eba0fb64
DM		 772 push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
773 push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
774
41524a58
DM		 775 push @cmd, "-m iprange --src-range" if $rule->{nbsource} && $rule->{nbsource} > 1;
776 push @cmd, "-s $rule->{source}" if $rule->{source};
777 push @cmd, "-m iprange --dst-range" if $rule->{nbdest} && $rule->{nbdest} > 1;
778 push @cmd, "-d $rule->{dest}" if $rule->{dest};
4b586518 779
181390b0 780 if ($rule->{proto}) {
41524a58 781 push @cmd, "-p $rule->{proto}";
e3a1d391 782
181390b0
DM		 783 my $multiport = 0;
784 $multiport++ if $rule->{nbdport} && ($rule->{nbdport} > 1);
785 $multiport++ if $rule->{nbsport} && ($rule->{nbsport} > 1);
e3a1d391 786
41524a58 787 push @cmd, "--match multiport" if $multiport;
4b586518 788
181390b0
DM		 789 die "multiport: option '--sports' cannot be used together with '--dports'\n"
790 if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
791
792 if ($rule->{dport}) {
793 if ($rule->{proto} && $rule->{proto} eq 'icmp') {
794 # Note: we use dport to store --icmp-type
795 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
41524a58 796 push @cmd, "-m icmp --icmp-type $rule->{dport}";
181390b0
DM		 797 } else {
798 if ($rule->{nbdport} && $rule->{nbdport} > 1) {
799 if ($multiport == 2) {
41524a58 800 push @cmd, "--ports $rule->{dport}";
181390b0 801 } else {
41524a58 802 push @cmd, "--dports $rule->{dport}";
181390b0 803 }
e3a1d391 804 } else {
41524a58 805 push @cmd, "--dport $rule->{dport}";
e3a1d391 806 }
4b586518
DM		 807 }
808 }
4b586518 809
181390b0
DM		 810 if ($rule->{sport}) {
811 if ($rule->{nbsport} && $rule->{nbsport} > 1) {
41524a58 812 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
181390b0 813 } else {
41524a58 814 push @cmd, "--sport $rule->{sport}";
181390b0 815 }
4b586518 816 }
181390b0
DM		 817 } elsif ($rule->{dport} || $rule->{sport}) {
818 warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
819 warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
4b586518
DM		 820 }
821
41524a58 822 push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
4e6112f9
DM		 823
824 if (my $action = $rule->{action}) {
2f906466 825 $action = $actions->{$action} if defined($actions->{$action});
4e6112f9 826 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
41524a58 827 push @cmd, $goto ? "-g $action" : "-j $action";
181390b0 828 }
3a616aa0 829
eba0fb64
DM		 830 return scalar(@cmd) ? join(' ', @cmd) : undef;
831}
832
833sub ruleset_generate_rule {
834 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
835
836 if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
41524a58
DM		 837 ruleset_addrule($ruleset, $chain, $cmdstr);
838 }
3fa83edf 839}
eba0fb64
DM		 840sub ruleset_generate_rule_insert {
841 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
842
843 if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
844 ruleset_insertrule($ruleset, $chain, $cmdstr);
845 }
846}
3fa83edf
DM		 847
848sub ruleset_create_chain {
849 my ($ruleset, $chain) = @_;
3a616aa0 850
d050c724 851 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
782c4cde 852 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
d050c724 853
3fa83edf
DM		 854 die "chain '$chain' already exists\n" if $ruleset->{$chain};
855
856 $ruleset->{$chain} = [];
3a616aa0
AD		 857}
858
3fa83edf
DM		 859sub ruleset_chain_exist {
860 my ($ruleset, $chain) = @_;
3a616aa0 861
3fa83edf
DM		 862 return $ruleset->{$chain} ? 1 : undef;
863}
3a616aa0 864
3fa83edf
DM		 865sub ruleset_addrule {
866 my ($ruleset, $chain, $rule) = @_;
3a616aa0 867
3fa83edf 868 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 869
3fa83edf
DM		 870 push @{$ruleset->{$chain}}, "-A $chain $rule";
871}
3a616aa0 872
3fa83edf
DM		 873sub ruleset_insertrule {
874 my ($ruleset, $chain, $rule) = @_;
3a616aa0 875
3fa83edf 876 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 877
3fa83edf
DM		 878 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
879}
3a616aa0 880
782c4cde
DM		 881sub get_log_rule_base {
882 my ($chain, $vmid, $msg, $loglevel) = @_;
883
884 die "internal error - no log level" if !defined($loglevel);
885
886 $vmid = 0 if !defined($vmid);
887
888 # Note: we use special format for prefix to pass further
889 # info to log daemon (VMID, LOGVELEL and CHAIN)
890
891 return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
892}
893
894sub ruleset_addlog {
895 my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
896
897 return if !defined($loglevel);
898
899 my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
900
901 $logrule = "$rule $logrule" if defined($rule);
902
903 ruleset_addrule($ruleset, $chain, $logrule)
904}
905
3fa83edf 906sub generate_bridge_chains {
530c005e
DM		 907 my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_;
908
909 my $options = $hostfw_conf->{options} || {};
910
911 die "error: detected direct route to bridge '$bridge'\n"
912 if !$options->{allow_bridge_route} && $routing_table->{$bridge};
2f3d8d76 913
5927497d
DM		 914 if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
915 ruleset_create_chain($ruleset, "$bridge-FW");
3cc81077
DM		 916 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-out -j $bridge-FW");
917 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-in -j $bridge-FW");
3fa83edf 918 }
3a616aa0 919
3fa83edf
DM		 920 if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
921 ruleset_create_chain($ruleset, "$bridge-OUT");
3cc81077
DM		 922 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-in -j $bridge-OUT");
923 ruleset_insertrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-in -j $bridge-OUT");
9fcad984
AD		 924 }
925
926 if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
927 ruleset_create_chain($ruleset, "$bridge-IN");
3cc81077 928 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j $bridge-IN");
fdb0bf20 929 ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
7323008d 930 # accept traffic to unmanaged bridge ports
3cc81077 931 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j ACCEPT ");
3fa83edf
DM		 932 }
933}
3a616aa0 934
ead850e8 935sub ruleset_add_chain_policy {
782c4cde 936 my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
ead850e8
DM		 937
938 if ($policy eq 'ACCEPT') {
939
940 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
941 { ACCEPT => $accept_action});
942
943 } elsif ($policy eq 'DROP') {
944
945 ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
946
782c4cde 947 ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
ead850e8
DM		 948
949 ruleset_addrule($ruleset, $chain, "-j DROP");
950 } elsif ($policy eq 'REJECT') {
951 ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
952
782c4cde 953 ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
ead850e8
DM		 954
955 ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
956 } else {
957 # should not happen
958 die "internal error: unknown policy '$policy'";
959 }
960}
961
9e15114a
DM		 962sub ruleset_create_vm_chain {
963 my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
3a616aa0 964
9e15114a 965 ruleset_create_chain($ruleset, $chain);
3a616aa0 966
bee633ab 967 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
9e15114a 968 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
bee633ab
DM		 969 }
970
ce15d90b 971 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
76a2d1e7 972 if ($direction eq 'OUT') {
9f00894a 973 ruleset_addrule($ruleset, $chain, "-p udp -m udp --sport 68 --dport 67 -g PVEFW-SET-ACCEPT-MARK");
76a2d1e7
DM		 974 } else {
975 ruleset_addrule($ruleset, $chain, "-p udp -m udp --sport 67 --dport 68 -j ACCEPT");
976 }
ce15d90b
DM		 977 }
978
bee633ab 979 if ($options->{tcpflags}) {
9e15114a 980 ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
bee633ab
DM		 981 }
982
9e15114a
DM		 983 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
984 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
3a616aa0 985
b21aca2c
DM		 986 if ($direction eq 'OUT') {
987 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
9e15114a 988 ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
b21aca2c 989 }
9e15114a 990 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
c29f55c9 991 }
9e15114a
DM		 992}
993
994sub ruleset_generate_vm_rules {
995 my ($ruleset, $rules, $groups_conf, $chain, $netid, $direction) = @_;
996
997 my $lc_direction = lc($direction);
c29f55c9 998
92e976b3
DM		 999 foreach my $rule (@$rules) {
1000 next if $rule->{iface} && $rule->{iface} ne $netid;
ea9e5116 1001 next if !$rule->{enable};
92e976b3
DM		 1002 if ($rule->{type} eq 'group') {
1003 my $group_chain = "GROUP-$rule->{action}-$direction";
1004 if(!ruleset_chain_exist($ruleset, $group_chain)){
1005 generate_group_rules($ruleset, $groups_conf, $rule->{action});
1006 }
9e15114a
DM		 1007 ruleset_addrule($ruleset, $chain, "-j $group_chain");
1008 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j RETURN")
92e976b3
DM		 1009 if $direction eq 'OUT';
1010 } else {
1011 next if $rule->{type} ne $lc_direction;
1012 if ($direction eq 'OUT') {
9e15114a 1013 ruleset_generate_rule($ruleset, $chain, $rule,
92e976b3 1014 { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
4e6112f9 1015 } else {
9e15114a 1016 ruleset_generate_rule($ruleset, $chain, $rule, { REJECT => "PVEFW-reject" });
3a616aa0 1017 }
4e6112f9 1018 }
3a616aa0 1019 }
9e15114a
DM		 1020}
1021
1022sub generate_venet_rules_direction {
1023 my ($ruleset, $groups_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1024
5176619e 1025 parse_address_list($ip); # make sure we have a valid $ip list
9e15114a
DM		 1026
1027 my $lc_direction = lc($direction);
1028
1029 my $rules = $vmfw_conf->{rules};
1030
1031 my $options = $vmfw_conf->{options};
1032 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1033
1034 my $chain = "venet0-$vmid-$direction";
1035
1036 ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1037
1038 ruleset_generate_vm_rules($ruleset, $rules, $groups_conf, $chain, 'venet', $direction);
1039
1040 # implement policy
1041 my $policy;
1042
1043 if ($direction eq 'OUT') {
1044 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1045 } else {
1046 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1047 }
1048
1049 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : "ACCEPT";
782c4cde 1050 ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
9e15114a 1051
38485daa 1052 # plug into FORWARD, INPUT and OUTPUT chain
eba0fb64
DM		 1053 if ($direction eq 'OUT') {
1054 ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD", {
1055 action => $chain,
1056 source => $ip,
1057 iface_in => 'venet0'});
38485daa
DM		 1058
1059 ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT", {
1060 action => $chain,
1061 source => $ip,
1062 iface_in => 'venet0'});
eba0fb64
DM		 1063 } else {
1064 ruleset_generate_rule($ruleset, "PVEFW-FORWARD", {
1065 action => $chain,
1066 dest => $ip,
1067 iface_out => 'venet0'});
38485daa
DM		 1068
1069 ruleset_generate_rule($ruleset, "PVEFW-OUTPUT", {
1070 action => $chain,
1071 dest => $ip,
1072 iface_out => 'venet0'});
eba0fb64 1073 }
9e15114a
DM		 1074}
1075
1076sub generate_tap_rules_direction {
782c4cde 1077 my ($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_;
9e15114a
DM		 1078
1079 my $lc_direction = lc($direction);
1080
1081 my $rules = $vmfw_conf->{rules};
1082
1083 my $options = $vmfw_conf->{options};
1084 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1085
1086 my $tapchain = "$iface-$direction";
1087
1088 ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1089
1090 ruleset_generate_vm_rules($ruleset, $rules, $groups_conf, $tapchain, $netid, $direction);
3a616aa0 1091
ccae0b50
DM		 1092 # implement policy
1093 my $policy;
1094
1095 if ($direction eq 'OUT') {
72f63fde 1096 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
ccae0b50 1097 } else {
72f63fde 1098 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
ccae0b50
DM		 1099 }
1100
ead850e8 1101 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : "ACCEPT";
782c4cde 1102 ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
3a616aa0 1103
3fa83edf 1104 # plug the tap chain to bridge chain
3cc81077
DM		 1105 if ($direction eq 'IN') {
1106 ruleset_insertrule($ruleset, "$bridge-IN",
1107 "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1108 } else {
1109 ruleset_insertrule($ruleset, "$bridge-OUT",
1110 "-m physdev --physdev-in $iface -j $tapchain");
1111 }
3a616aa0
AD		 1112}
1113
d18c1e2b 1114sub enable_host_firewall {
92e976b3 1115 my ($ruleset, $hostfw_conf, $groups_conf) = @_;
0bd5f137 1116
51bae274 1117 # fixme: allow security groups
0bd5f137 1118
92e976b3
DM		 1119 my $options = $hostfw_conf->{options};
1120 my $rules = $hostfw_conf->{rules};
178a63be 1121
3fa83edf 1122 # host inbound firewall
dec84fcd
DM		 1123 my $chain = "PVEFW-HOST-IN";
1124 ruleset_create_chain($ruleset, $chain);
0bd5f137 1125
178a63be
DM		 1126 my $loglevel = get_option_log_level($options, "log_level_in");
1127
4ac863a6
DM		 1128 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1129 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1130 }
1131
fb424a00
DM		 1132 if ($options->{tcpflags}) {
1133 ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1134 }
1135
7fab95bc
DM		 1136 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1137 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
dec84fcd
DM		 1138 ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1139 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
97156ecc 1140 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
dec84fcd 1141 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 1142
23e888f8
DM		 1143 # we use RETURN because we need to check also tap rules
1144 my $accept_action = 'RETURN';
1145
92e976b3
DM		 1146 foreach my $rule (@$rules) {
1147 next if $rule->{type} ne 'in';
23e888f8 1148 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
0bd5f137
AD		 1149 }
1150
23e888f8 1151 # implement input policy
72f63fde 1152 my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
782c4cde 1153 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
0bd5f137 1154
3fa83edf 1155 # host outbound firewall
aadd745e 1156 $chain = "PVEFW-HOST-OUT";
dec84fcd
DM		 1157 ruleset_create_chain($ruleset, $chain);
1158
178a63be
DM		 1159 $loglevel = get_option_log_level($options, "log_level_out");
1160
7fab95bc
DM		 1161 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1162 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
dec84fcd
DM		 1163 ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1164 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
97156ecc 1165 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
dec84fcd 1166 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 1167
23e888f8
DM		 1168 # we use RETURN because we may want to check other thigs later
1169 $accept_action = 'RETURN';
1170
92e976b3
DM		 1171 foreach my $rule (@$rules) {
1172 next if $rule->{type} ne 'out';
23e888f8 1173 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
0bd5f137
AD		 1174 }
1175
23e888f8 1176 # implement output policy
72f63fde 1177 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
782c4cde 1178 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
6158271d 1179
dec84fcd
DM		 1180 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1181 ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
9d31b418
AD		 1182}
1183
1184sub generate_group_rules {
92e976b3 1185 my ($ruleset, $groups_conf, $group) = @_;
ac7648e0 1186 die "no such security group '$group'\n" if !$groups_conf->{rules}->{$group};
9d31b418 1187
8f119284 1188 my $rules = $groups_conf->{rules}->{$group};
6158271d 1189
3fa83edf 1190 my $chain = "GROUP-${group}-IN";
9d31b418 1191
3fa83edf 1192 ruleset_create_chain($ruleset, $chain);
9d31b418 1193
92e976b3
DM		 1194 foreach my $rule (@$rules) {
1195 next if $rule->{type} ne 'in';
1196 ruleset_generate_rule($ruleset, $chain, $rule, { REJECT => "PVEFW-reject" });
9d31b418
AD		 1197 }
1198
3fa83edf 1199 $chain = "GROUP-${group}-OUT";
9d31b418 1200
3fa83edf 1201 ruleset_create_chain($ruleset, $chain);
4e6112f9 1202 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
9d31b418 1203
92e976b3
DM		 1204 foreach my $rule (@$rules) {
1205 next if $rule->{type} ne 'out';
1206 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1207 # check also other tap rules later
1208 ruleset_generate_rule($ruleset, $chain, $rule,
1209 { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
9d31b418 1210 }
9d31b418
AD		 1211}
1212
51bae274
DM		 1213my $MAX_NETS = 32;
1214my $valid_netdev_names = {};
1215for (my $i = 0; $i < $MAX_NETS; $i++) {
1216 $valid_netdev_names->{"net$i"} = 1;
1217}
5e1267a5 1218
51bae274
DM		 1219sub parse_fw_rule {
1220 my ($line, $need_iface, $allow_groups) = @_;
5e1267a5 1221
a332200b 1222 my $macros = get_firewall_macros();
fcba0beb 1223 my $protocols = get_etc_protocols();
51bae274 1224
92e976b3 1225 my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
51bae274 1226
11bac5c2 1227 # we can add single line comments to the end of the rule
30c1ae52 1228 my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
11bac5c2
DM		 1229
1230 # we can disable a rule when prefixed with '|'
ea9e5116
DM		 1231 my $enable = 1;
1232
1233 $enable = 0 if $line =~ s/^\|//;
51bae274
DM		 1234
1235 my @data = split(/\s+/, $line);
92e976b3 1236 my $expected_elements = $need_iface ? 8 : 7;
51bae274
DM		 1237
1238 die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1239
1240 if ($need_iface) {
92e976b3 1241 ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
51bae274 1242 } else {
92e976b3 1243 ($type, $action, $source, $dest, $proto, $dport, $sport) = @data;
51bae274
DM		 1244 }
1245
92e976b3 1246 die "incomplete rule\n" if ! ($type && $action);
51bae274 1247
961b4928
DM		 1248 my $macro;
1249 my $macro_name;
1250
92e976b3
DM		 1251 $type = lc($type);
1252
1253 if ($type eq 'in' || $type eq 'out') {
1254 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1255 # OK
1256 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1257 ($macro_name, $action) = ($1, $2);
1258 my $lc_macro_name = lc($macro_name);
1259 my $preferred_name = $pve_fw_preferred_macro_names->{$lc_macro_name};
1260 $macro_name = $preferred_name if $preferred_name;
1261 $macro = $macros->{$lc_macro_name};
1262 die "unknown macro '$macro_name'\n" if !$macro;
1263 } else {
1264 die "unknown action '$action'\n";
1265 }
1266 } elsif ($type eq 'group') {
1267 die "wrong number of rule elements\n" if scalar(@data) != 3;
1268 die "groups disabled\n" if !$allow_groups;
1269
1270 die "invalid characters in group name\n" if $action !~ m/^[A-Za-z0-9_\-]+$/;
51bae274 1271 } else {
92e976b3 1272 die "unknown rule type '$type'\n";
51bae274
DM		 1273 }
1274
1275 if ($need_iface) {
1276 $iface = undef if $iface && $iface eq '-';
51bae274
DM		 1277 }
1278
1279 $proto = undef if $proto && $proto eq '-';
6158271d 1280 die "unknown protokol '$proto'\n" if $proto &&
51bae274
DM		 1281 !(defined($protocols->{byname}->{$proto}) ||
1282 defined($protocols->{byid}->{$proto}));
1283
1284 $source = undef if $source && $source eq '-';
1285 $dest = undef if $dest && $dest eq '-';
1286
1287 $dport = undef if $dport && $dport eq '-';
1288 $sport = undef if $sport && $sport eq '-';
1289
51bae274
DM		 1290 my $nbsource = undef;
1291 my $nbdest = undef;
1292
1293 $nbsource = parse_address_list($source) if $source;
1294 $nbdest = parse_address_list($dest) if $dest;
6158271d 1295
961b4928 1296 my $rules = [];
51bae274 1297
961b4928 1298 my $param = {
92e976b3 1299 type => $type,
ea9e5116 1300 enable => $enable,
11bac5c2 1301 comment => $comment,
51bae274 1302 action => $action,
51bae274
DM		 1303 iface => $iface,
1304 source => $source,
1305 dest => $dest,
1306 nbsource => $nbsource,
1307 nbdest => $nbdest,
1308 proto => $proto,
1309 dport => $dport,
1310 sport => $sport,
51bae274 1311 };
961b4928
DM		 1312
1313 if ($macro) {
1314 foreach my $templ (@$macro) {
1315 my $rule = {};
faf7be7e 1316 my $param_used = {};
961b4928
DM		 1317 foreach my $k (keys %$templ) {
1318 my $v = $templ->{$k};
857f62c8
DM		 1319 if ($v eq 'PARAM') {
1320 $v = $param->{$k};
faf7be7e 1321 $param_used->{$k} = 1;
857f62c8
DM		 1322 } elsif ($v eq 'DEST') {
1323 $v = $param->{dest};
faf7be7e 1324 $param_used->{dest} = 1;
857f62c8
DM		 1325 } elsif ($v eq 'SOURCE') {
1326 $v = $param->{source};
faf7be7e 1327 $param_used->{source} = 1;
857f62c8
DM		 1328 }
1329
961b4928
DM		 1330 die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
1331 $rule->{$k} = $v;
1332 }
faf7be7e
DM		 1333 foreach my $k (keys %$param) {
1334 next if !defined($param->{$k});
1335 next if $param_used->{$k};
1336 if (defined($rule->{$k})) {
1337 die "parameter '$k' already define in macro (value = '$rule->{$k}')\n"
1338 if $rule->{$k} ne $param->{$k};
1339 } else {
1340 $rule->{$k} = $param->{$k};
1341 }
1342 }
961b4928
DM		 1343 push @$rules, $rule;
1344 }
1345 } else {
1346 push @$rules, $param;
1347 }
1348
1349 foreach my $rule (@$rules) {
6158271d 1350 $rule->{nbdport} = parse_port_name_number_or_range($rule->{dport})
961b4928 1351 if defined($rule->{dport});
6158271d 1352 $rule->{nbsport} = parse_port_name_number_or_range($rule->{sport})
961b4928
DM		 1353 if defined($rule->{sport});
1354 }
1355
1356 return $rules;
51bae274
DM		 1357}
1358
2d404ffc 1359sub parse_vmfw_option {
85c6eaed
DM		 1360 my ($line) = @_;
1361
1362 my ($opt, $value);
1363
178a63be
DM		 1364 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1365
ce15d90b 1366 if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
9c6b6efd
DM		 1367 $opt = lc($1);
1368 $value = int($2);
178a63be
DM		 1369 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1370 $opt = lc($1);
1371 $value = $2 ? lc($3) : '';
72f63fde 1372 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
85c6eaed
DM		 1373 $opt = lc($1);
1374 $value = uc($3);
9c6b6efd 1375 } else {
85c6eaed
DM		 1376 chomp $line;
1377 die "can't parse option '$line'\n"
1378 }
1379
1380 return ($opt, $value);
1381}
1382
2d404ffc
DM		 1383sub parse_hostfw_option {
1384 my ($line) = @_;
1385
1386 my ($opt, $value);
1387
1388 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1389
530c005e 1390 if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags|allow_bridge_route):\s*(0|1)\s*$/i) {
2d404ffc
DM		 1391 $opt = lc($1);
1392 $value = int($2);
178a63be 1393 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2d404ffc
DM		 1394 $opt = lc($1);
1395 $value = $2 ? lc($3) : '';
72f63fde 1396 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2d404ffc
DM		 1397 $opt = lc($1);
1398 $value = uc($3);
490cdead
DM		 1399 } elsif ($line =~ m/^(nf_conntrack_max):\s*(\d+)\s*$/i) {
1400 $opt = lc($1);
1401 $value = int($2);
2d404ffc
DM		 1402 } else {
1403 chomp $line;
1404 die "can't parse option '$line'\n"
1405 }
1406
1407 return ($opt, $value);
1408}
1409
51bae274
DM		 1410sub parse_vm_fw_rules {
1411 my ($filename, $fh) = @_;
1412
92e976b3 1413 my $res = { rules => [], options => {}};
51bae274
DM		 1414
1415 my $section;
1416
e7b35711
DM		 1417 my $digest = Digest::SHA->new('sha1');
1418
5e1267a5 1419 while (defined(my $line = <$fh>)) {
e7b35711
DM		 1420 $digest->add($line);
1421
5e1267a5
DM		 1422 next if $line =~ m/^#/;
1423 next if $line =~ m/^\s*$/;
1424
961b4928
DM		 1425 my $linenr = $fh->input_line_number();
1426 my $prefix = "$filename (line $linenr)";
1427
85c6eaed 1428 if ($line =~ m/^\[(\S+)\]\s*$/i) {
5e1267a5 1429 $section = lc($1);
85c6eaed 1430 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
5e1267a5
DM		 1431 next;
1432 }
51bae274 1433 if (!$section) {
961b4928 1434 warn "$prefix: skip line - no section";
5e1267a5
DM		 1435 next;
1436 }
1437
85c6eaed
DM		 1438 next if !$res->{$section}; # skip undefined section
1439
1440 if ($section eq 'options') {
6158271d 1441 eval {
2d404ffc 1442 my ($opt, $value) = parse_vmfw_option($line);
85c6eaed
DM		 1443 $res->{options}->{$opt} = $value;
1444 };
1445 warn "$prefix: $@" if $@;
1446 next;
1447 }
1448
961b4928
DM		 1449 my $rules;
1450 eval { $rules = parse_fw_rule($line, 1, 1); };
51bae274 1451 if (my $err = $@) {
961b4928 1452 warn "$prefix: $err";
5e1267a5
DM		 1453 next;
1454 }
1455
961b4928 1456 push @{$res->{$section}}, @$rules;
51bae274
DM		 1457 }
1458
e7b35711
DM		 1459 $res->{digest} = $digest->b64digest;
1460
51bae274
DM		 1461 return $res;
1462}
1463
1464sub parse_host_fw_rules {
1465 my ($filename, $fh) = @_;
1466
92e976b3 1467 my $res = { rules => [], options => {}};
51bae274
DM		 1468
1469 my $section;
1470
8b27beb9
DM		 1471 my $digest = Digest::SHA->new('sha1');
1472
51bae274 1473 while (defined(my $line = <$fh>)) {
8b27beb9
DM		 1474 $digest->add($line);
1475
51bae274
DM		 1476 next if $line =~ m/^#/;
1477 next if $line =~ m/^\s*$/;
1478
961b4928
DM		 1479 my $linenr = $fh->input_line_number();
1480 my $prefix = "$filename (line $linenr)";
1481
2d404ffc 1482 if ($line =~ m/^\[(\S+)\]\s*$/i) {
51bae274 1483 $section = lc($1);
2d404ffc 1484 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
5e1267a5
DM		 1485 next;
1486 }
51bae274 1487 if (!$section) {
961b4928 1488 warn "$prefix: skip line - no section";
5e1267a5
DM		 1489 next;
1490 }
1491
2d404ffc
DM		 1492 next if !$res->{$section}; # skip undefined section
1493
1494 if ($section eq 'options') {
1495 eval {
2d404ffc
DM		 1496 my ($opt, $value) = parse_hostfw_option($line);
1497 $res->{options}->{$opt} = $value;
1498 };
1499 warn "$prefix: $@" if $@;
1500 next;
1501 }
1502
961b4928
DM		 1503 my $rules;
1504 eval { $rules = parse_fw_rule($line, 1, 1); };
ecbea048 1505 if (my $err = $@) {
961b4928 1506 warn "$prefix: $err";
ecbea048 1507 next;
ecbea048
DM		 1508 }
1509
961b4928 1510 push @{$res->{$section}}, @$rules;
51bae274 1511 }
ecbea048 1512
8b27beb9
DM		 1513 $res->{digest} = $digest->b64digest;
1514
51bae274
DM		 1515 return $res;
1516}
4cdbb3b7 1517
51bae274
DM		 1518sub parse_group_fw_rules {
1519 my ($filename, $fh) = @_;
5e1267a5 1520
51bae274
DM		 1521 my $section;
1522 my $group;
1523
8f119284 1524 my $res = { rules => {} };
6158271d 1525
d1c53b3e
DM		 1526 my $digest = Digest::SHA->new('sha1');
1527
51bae274 1528 while (defined(my $line = <$fh>)) {
d1c53b3e
DM		 1529 $digest->add($line);
1530
51bae274
DM		 1531 next if $line =~ m/^#/;
1532 next if $line =~ m/^\s*$/;
1533
961b4928
DM		 1534 my $linenr = $fh->input_line_number();
1535 my $prefix = "$filename (line $linenr)";
1536
92e976b3
DM		 1537 if ($line =~ m/^\[group\s+(\S+)\]\s*$/i) {
1538 $section = 'rules';
1539 $group = lc($1);
51bae274
DM		 1540 next;
1541 }
1542 if (!$section || !$group) {
961b4928 1543 warn "$prefix: skip line - no section";
51bae274
DM		 1544 next;
1545 }
1546
961b4928
DM		 1547 my $rules;
1548 eval { $rules = parse_fw_rule($line, 0, 0); };
51bae274 1549 if (my $err = $@) {
961b4928 1550 warn "$prefix: $err";
51bae274
DM		 1551 next;
1552 }
1553
8f119284 1554 push @{$res->{$section}->{$group}}, @$rules;
5e1267a5
DM		 1555 }
1556
d1c53b3e
DM		 1557 $res->{digest} = $digest->b64digest;
1558
5e1267a5
DM		 1559 return $res;
1560}
1561
06320eb0
DM		 1562sub run_locked {
1563 my ($code, @param) = @_;
1564
1565 my $timeout = 10;
1566
1567 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
1568
1569 die $@ if $@;
1570
1571 return $res;
1572}
1573
5e1267a5
DM		 1574sub read_local_vm_config {
1575
1576 my $openvz = {};
5e1267a5
DM		 1577 my $qemu = {};
1578
c8301d63 1579 my $vmdata = { openvz => $openvz, qemu => $qemu };
5e1267a5 1580
c8301d63
DM		 1581 my $vmlist = PVE::Cluster::get_vmlist();
1582 return $vmdata if !$vmlist || !$vmlist->{ids};
1583 my $ids = $vmlist->{ids};
1584
1585 foreach my $vmid (keys %$ids) {
1586 next if !$vmid; # skip VE0
1587 my $d = $ids->{$vmid};
1588 next if !$d->{node} || $d->{node} ne $nodename;
1589 next if !$d->{type};
1590 if ($d->{type} eq 'openvz') {
d9fee004
DM		 1591 if ($have_pve_manager) {
1592 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
1593 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1594 $openvz->{$vmid} = $conf;
1595 }
c8301d63
DM		 1596 }
1597 } elsif ($d->{type} eq 'qemu') {
d9fee004
DM		 1598 if ($have_qemu_server) {
1599 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
1600 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1601 $qemu->{$vmid} = $conf;
1602 }
c8301d63 1603 }
5e1267a5
DM		 1604 }
1605 }
d9fee004 1606
5e1267a5
DM		 1607 return $vmdata;
1608};
1609
e7b35711
DM		 1610sub load_vmfw_conf {
1611 my ($vmid) = @_;
1612
1613 my $vmfw_conf = {};
1614
1615 my $filename = "/etc/pve/firewall/$vmid.fw";
1616 if (my $fh = IO::File->new($filename, O_RDONLY)) {
1617 $vmfw_conf = parse_vm_fw_rules($filename, $fh);
1618 }
1619
1620 return $vmfw_conf;
1621}
1622
6fc63ffd 1623sub read_vm_firewall_configs {
5e1267a5 1624 my ($vmdata) = @_;
6fc63ffd 1625 my $vmfw_configs = {};
c8301d63 1626
5e1267a5 1627 foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
e7b35711
DM		 1628 my $vmfw_conf = load_vmfw_conf($vmid);
1629 next if !$vmfw_conf->{options}; # skip if file does not exists
1630 $vmfw_configs->{$vmid} = $vmfw_conf;
5e1267a5
DM		 1631 }
1632
6fc63ffd 1633 return $vmfw_configs;
5e1267a5
DM		 1634}
1635
2d404ffc
DM		 1636sub get_option_log_level {
1637 my ($options, $k) = @_;
1638
1639 my $v = $options->{$k};
178a63be 1640 $v = $default_log_level if !defined($v);
2d404ffc
DM		 1641
1642 return undef if $v eq '' || $v eq 'nolog';
1643
1644 $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
1645
1646 return $v if ($v >= 0) && ($v <= 7);
1647
1648 warn "unknown log level ($k = '$v')\n";
1649
1650 return undef;
1651}
1652
d8f2505e 1653sub generate_std_chains {
2d404ffc
DM		 1654 my ($ruleset, $options) = @_;
1655
1656 my $loglevel = get_option_log_level($options, 'smurf_log_level');
1657
1658 # same as shorewall smurflog.
782c4cde
DM		 1659 my $chain = 'PVEFW-smurflog';
1660
1661 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
1662 push @{$pve_std_chains->{$chain}}, "-j DROP";
2d404ffc
DM		 1663
1664 # same as shorewall logflags action.
1665 $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
782c4cde
DM		 1666 $chain = 'PVEFW-logflags';
1667 # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
1668 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
1669 push @{$pve_std_chains->{$chain}}, "-j DROP";
d8f2505e
DM		 1670
1671 foreach my $chain (keys %$pve_std_chains) {
1672 ruleset_create_chain($ruleset, $chain);
1673 foreach my $rule (@{$pve_std_chains->{$chain}}) {
1674 if (ref($rule)) {
1675 ruleset_generate_rule($ruleset, $chain, $rule);
1676 } else {
1677 ruleset_addrule($ruleset, $chain, $rule);
1678 }
1679 }
1680 }
1681}
1682
6b9f68a2
DM		 1683sub save_pvefw_status {
1684 my ($status) = @_;
1685
1686 die "unknown status '$status' - internal error"
1687 if $status !~ m/^(stopped|active)$/;
1688
1689 mkdir dirname($pve_fw_status_filename);
1690 PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
1691}
1692
1693sub read_pvefw_status {
1694
1695 my $status = 'unknown';
1696
1697 return 'stopped' if ! -f $pve_fw_status_filename;
1698
1699 eval {
1700 $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
1701 };
1702 warn $@ if $@;
1703
1704 return $status;
1705}
1706
530c005e
DM		 1707# fixme: move to pve-common PVE::ProcFSTools
1708sub read_proc_net_route {
1709 my $filename = "/proc/net/route";
1710
1711 my $res = {};
1712
1713 my $fh = IO::File->new ($filename, "r");
1714 return $res if !$fh;
1715
1716 my $int_to_quad = sub {
1717 return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
1718 };
1719
1720 while (defined(my $line = <$fh>)) {
1721 next if $line =~/^Iface\s+Destination/; # skip head
1722 my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
1723 push @{$res->{$iface}}, {
1724 dest => &$int_to_quad(hex($dest)),
1725 gateway => &$int_to_quad(hex($gateway)),
1726 mask => &$int_to_quad(hex($mask)),
1727 metric => $metric,
1728 mtu => $mtu,
1729 };
1730 }
1731
1732 return $res;
1733}
1734
e5d76bde 1735sub load_security_groups {
530c005e 1736
92e976b3 1737 my $groups_conf = {};
51bae274
DM		 1738 my $filename = "/etc/pve/firewall/groups.fw";
1739 if (my $fh = IO::File->new($filename, O_RDONLY)) {
92e976b3 1740 $groups_conf = parse_group_fw_rules($filename, $fh);
51bae274 1741 }
5e1267a5 1742
e5d76bde
DM		 1743 return $groups_conf;
1744}
1745
8b27beb9
DM		 1746sub load_hostfw_conf {
1747
1748 my $hostfw_conf = {};
1749 my $filename = "/etc/pve/local/host.fw";
1750 if (my $fh = IO::File->new($filename, O_RDONLY)) {
1751 $hostfw_conf = parse_host_fw_rules($filename, $fh);
1752 }
1753 return $hostfw_conf;
1754}
1755
e5d76bde
DM		 1756sub compile {
1757 my $vmdata = read_local_vm_config();
1758 my $vmfw_configs = read_vm_firewall_configs($vmdata);
1759
1760 my $routing_table = read_proc_net_route();
1761
1762 my $groups_conf = load_security_groups();
1763
3fa83edf
DM		 1764 my $ruleset = {};
1765
dec84fcd
DM		 1766 ruleset_create_chain($ruleset, "PVEFW-INPUT");
1767 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
5b1df9a0 1768
fadb13dd 1769 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3fa83edf 1770
8b27beb9
DM		 1771 my $hostfw_conf = load_hostfw_conf();
1772 my $hostfw_options = $hostfw_conf->{options} || {};
fadb13dd 1773
92e976b3 1774 generate_std_chains($ruleset, $hostfw_options);
fadb13dd 1775
6d2ab017 1776 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2d404ffc 1777
d18c1e2b 1778 enable_host_firewall($ruleset, $hostfw_conf, $groups_conf) if $hostfw_enable;
3fa83edf 1779
6158271d 1780 # generate firewall rules for QEMU VMs
3fa83edf
DM		 1781 foreach my $vmid (keys %{$vmdata->{qemu}}) {
1782 my $conf = $vmdata->{qemu}->{$vmid};
6fc63ffd 1783 my $vmfw_conf = $vmfw_configs->{$vmid};
fa9c4a6f
DM		 1784 next if !$vmfw_conf;
1785 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
3fa83edf
DM		 1786
1787 foreach my $netid (keys %$conf) {
1788 next if $netid !~ m/^net(\d+)$/;
1789 my $net = PVE::QemuServer::parse_net($conf->{$netid});
1790 next if !$net;
1791 my $iface = "tap${vmid}i$1";
5e1267a5 1792
3fa83edf
DM		 1793 my $bridge = $net->{bridge};
1794 next if !$bridge; # fixme: ?
1795
1796 $bridge .= "v$net->{tag}" if $net->{tag};
1797
530c005e 1798 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
3fa83edf 1799
c29f55c9 1800 my $macaddr = $net->{macaddr};
782c4cde
DM		 1801 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr,
1802 $vmfw_conf, $vmid, $bridge, 'IN');
1803 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr,
1804 $vmfw_conf, $vmid, $bridge, 'OUT');
3fa83edf
DM		 1805 }
1806 }
c8301d63
DM		 1807
1808 # generate firewall rules for OpenVZ containers
1809 foreach my $vmid (keys %{$vmdata->{openvz}}) {
1810 my $conf = $vmdata->{openvz}->{$vmid};
1811
1812 my $vmfw_conf = $vmfw_configs->{$vmid};
1813 next if !$vmfw_conf;
1814 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
1815
1816 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
1817 my $ip = $conf->{ip_address}->{value};
9e15114a
DM		 1818 generate_venet_rules_direction($ruleset, $groups_conf, $vmfw_conf, $vmid, $ip, 'IN');
1819 generate_venet_rules_direction($ruleset, $groups_conf, $vmfw_conf, $vmid, $ip, 'OUT');
c8301d63
DM		 1820 }
1821
1822 if ($conf->{netif} && $conf->{netif}->{value}) {
1823 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
c8301d63
DM		 1824 foreach my $netid (keys %$netif) {
1825 my $d = $netif->{$netid};
1826 my $bridge = $d->{bridge};
1827 if (!$bridge) {
1828 warn "no bridge device for CT $vmid iface '$netid'\n";
1829 next; # fixme?
1830 }
530c005e
DM		 1831
1832 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
1833
12d0f130 1834 my $macaddr = $d->{mac};
c8301d63 1835 my $iface = $d->{host_ifname};
782c4cde
DM		 1836 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr,
1837 $vmfw_conf, $vmid, $bridge, 'IN');
1838 generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr,
1839 $vmfw_conf, $vmid, $bridge, 'OUT');
c8301d63
DM		 1840 }
1841 }
1842 }
c0413e35 1843
eba0fb64
DM		 1844 # fixme: what log level should we use here?
1845 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
1846
c98c037d
DM		 1847 # fixme: should we really block inter-bridge traffic?
1848
1849 # always allow traffic from containers?
1850 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN");
1851
eba0fb64
DM		 1852 # disable interbridge routing
1853 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop");
1854 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop");
782c4cde
DM		 1855 ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-o vmbr+");
1856 ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-i vmbr+");
eba0fb64
DM		 1857 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP");
1858 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP");
1859
490cdead 1860 return wantarray ? ($ruleset, $hostfw_conf) : $ruleset;
3fa83edf
DM		 1861}
1862
1863sub get_ruleset_status {
1864 my ($ruleset, $verbose) = @_;
1865
1866 my $active_chains = iptables_get_chains();
1867
1868 my $statushash = {};
1869
1870 foreach my $chain (sort keys %$ruleset) {
09d5f68e 1871 my $digest = Digest::SHA->new('sha1');
3fa83edf
DM		 1872 foreach my $cmd (@{$ruleset->{$chain}}) {
1873 $digest->add("$cmd\n");
1874 }
1875 my $sig = $digest->b64digest;
1876 $statushash->{$chain}->{sig} = $sig;
1877
1878 my $oldsig = $active_chains->{$chain};
1879 if (!defined($oldsig)) {
1880 $statushash->{$chain}->{action} = 'create';
1881 } else {
1882 if ($oldsig eq $sig) {
1883 $statushash->{$chain}->{action} = 'exists';
1884 } else {
1885 $statushash->{$chain}->{action} = 'update';
1886 }
1887 }
1888 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
1889 foreach my $cmd (@{$ruleset->{$chain}}) {
1890 print "\t$cmd\n" if $verbose;
1891 }
1892 }
1893
1894 foreach my $chain (sort keys %$active_chains) {
1895 if (!defined($ruleset->{$chain})) {
1896 my $sig = $active_chains->{$chain};
1897 $statushash->{$chain}->{action} = 'delete';
1898 $statushash->{$chain}->{sig} = $sig;
1899 print "delete $chain ($sig)\n" if $verbose;
1900 }
6158271d 1901 }
3fa83edf
DM		 1902
1903 return $statushash;
1904}
1905
1906sub print_ruleset {
1907 my ($ruleset) = @_;
1908
1909 get_ruleset_status($ruleset, 1);
1910}
1911
1912sub print_sig_rule {
1913 my ($chain, $sig) = @_;
1914
09d5f68e
DM		 1915 # We just use this to store a SHA1 checksum used to detect changes
1916 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
b6360c3f
DM		 1917}
1918
6b9f68a2 1919sub get_rulset_cmdlist {
a84f4d96 1920 my ($ruleset, $verbose) = @_;
3fa83edf 1921
3fa83edf
DM		 1922 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
1923
1924 my $statushash = get_ruleset_status($ruleset, $verbose);
1925
1926 # create missing chains first
1927 foreach my $chain (sort keys %$ruleset) {
1928 my $stat = $statushash->{$chain};
1929 die "internal error" if !$stat;
1930 next if $stat->{action} ne 'create';
886aba9c 1931
3fa83edf
DM		 1932 $cmdlist .= ":$chain - [0:0]\n";
1933 }
1934
dec84fcd 1935 my $rule = "INPUT -j PVEFW-INPUT";
3fa83edf
DM		 1936 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1937 $cmdlist .= "-A $rule\n";
1938 }
dec84fcd 1939 $rule = "OUTPUT -j PVEFW-OUTPUT";
3fa83edf
DM		 1940 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1941 $cmdlist .= "-A $rule\n";
1942 }
1943
dec84fcd 1944 $rule = "FORWARD -j PVEFW-FORWARD";
3fa83edf
DM		 1945 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1946 $cmdlist .= "-A $rule\n";
1947 }
1948
1949 foreach my $chain (sort keys %$ruleset) {
1950 my $stat = $statushash->{$chain};
1951 die "internal error" if !$stat;
1952
1953 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
1954 $cmdlist .= "-F $chain\n";
1955 foreach my $cmd (@{$ruleset->{$chain}}) {
1956 $cmdlist .= "$cmd\n";
1957 }
1958 $cmdlist .= print_sig_rule($chain, $stat->{sig});
1959 } elsif ($stat->{action} eq 'delete') {
f5d28682 1960 die "internal error"; # this should not happen
3fa83edf
DM		 1961 } elsif ($stat->{action} eq 'exists') {
1962 # do nothing
1963 } else {
1964 die "internal error - unknown status '$stat->{action}'";
1965 }
1966 }
1967
f5d28682
DM		 1968 foreach my $chain (keys %$statushash) {
1969 next if $statushash->{$chain}->{action} ne 'delete';
1970 $cmdlist .= "-F $chain\n";
1971 }
1972 foreach my $chain (keys %$statushash) {
1973 next if $statushash->{$chain}->{action} ne 'delete';
fadb13dd
DM		 1974 next if $chain eq 'PVEFW-INPUT';
1975 next if $chain eq 'PVEFW-OUTPUT';
1976 next if $chain eq 'PVEFW-FORWARD';
f5d28682
DM		 1977 $cmdlist .= "-X $chain\n";
1978 }
1979
3fa83edf
DM		 1980 $cmdlist .= "COMMIT\n";
1981
6b9f68a2
DM		 1982 return $cmdlist;
1983}
1984
1985sub apply_ruleset {
edb75ba9 1986 my ($ruleset, $hostfw_conf, $verbose) = @_;
6b9f68a2
DM		 1987
1988 enable_bridge_firewall();
1989
edb75ba9
DM		 1990 update_nf_conntrack_max($hostfw_conf);
1991
6b9f68a2
DM		 1992 my $cmdlist = get_rulset_cmdlist($ruleset, $verbose);
1993
3fa83edf
DM		 1994 print $cmdlist if $verbose;
1995
1996 iptables_restore_cmdlist($cmdlist);
1997
6158271d 1998 # test: re-read status and check if everything is up to date
6b9f68a2 1999 my $statushash = get_ruleset_status($ruleset);
3fa83edf
DM		 2000
2001 my $errors;
2002 foreach my $chain (sort keys %$ruleset) {
2003 my $stat = $statushash->{$chain};
2004 if ($stat->{action} ne 'exists') {
2005 warn "unable to update chain '$chain'\n";
2006 $errors = 1;
2007 }
2008 }
b6360c3f 2009
3fa83edf 2010 die "unable to apply firewall changes\n" if $errors;
b6360c3f
DM		 2011}
2012
490cdead
DM		 2013sub update_nf_conntrack_max {
2014 my ($hostfw_conf) = @_;
2015
2016 my $max = 65536; # reasonable default
2017
2018 my $options = $hostfw_conf->{options} || {};
2019
2020 if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2021 $max = $options->{nf_conntrack_max};
2022 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2023 }
2024
2025 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2026 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2027
2028 my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
2029
2030 if ($current != $max) {
2031 my $hashsize = int($max/4);
2032 PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
2033 PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
2034 }
2035}
2036
6b9f68a2
DM		 2037sub update {
2038 my ($start, $verbose) = @_;
2039
2040 my $code = sub {
2041 my $status = read_pvefw_status();
2042
490cdead
DM		 2043 my ($ruleset, $hostfw_conf) = PVE::Firewall::compile();
2044
6b9f68a2
DM		 2045 if ($start || $status eq 'active') {
2046
2047 save_pvefw_status('active') if ($status ne 'active');
2048
edb75ba9 2049 apply_ruleset($ruleset, $hostfw_conf, $verbose);
6b9f68a2
DM		 2050 } else {
2051 print "Firewall not active (status = $status)\n" if $verbose;
2052 }
2053 };
2054
2055 run_locked($code);
2056}
2057
2058
b6360c3f 20591;
Firewall test scripts