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[pve-firewall.git] / PVE / Firewall.pm
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b6360c3f
DM		 1package PVE::Firewall;
2
3use warnings;
4use strict;
5use Data::Dumper;
09d5f68e 6use Digest::SHA;
f789653a 7use PVE::Tools;
b6360c3f 8use PVE::QemuServer;
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 ],
d8f2505e
DM		 420};
421
4b586518
DM		 422# iptables -p icmp -h
423my $icmp_type_names = {
424 any => 1,
425 'echo-reply' => 1,
426 'destination-unreachable' => 1,
427 'network-unreachable' => 1,
428 'host-unreachable' => 1,
429 'protocol-unreachable' => 1,
430 'port-unreachable' => 1,
431 'fragmentation-needed' => 1,
432 'source-route-failed' => 1,
433 'network-unknown' => 1,
434 'host-unknown' => 1,
435 'network-prohibited' => 1,
436 'host-prohibited' => 1,
437 'TOS-network-unreachable' => 1,
438 'TOS-host-unreachable' => 1,
439 'communication-prohibited' => 1,
440 'host-precedence-violation' => 1,
441 'precedence-cutoff' => 1,
442 'source-quench' => 1,
443 'redirect' => 1,
444 'network-redirect' => 1,
445 'host-redirect' => 1,
446 'TOS-network-redirect' => 1,
447 'TOS-host-redirect' => 1,
448 'echo-request' => 1,
449 'router-advertisement' => 1,
450 'router-solicitation' => 1,
451 'time-exceeded' => 1,
452 'ttl-zero-during-transit' => 1,
453 'ttl-zero-during-reassembly' => 1,
454 'parameter-problem' => 1,
455 'ip-header-bad' => 1,
456 'required-option-missing' => 1,
457 'timestamp-request' => 1,
458 'timestamp-reply' => 1,
459 'address-mask-request' => 1,
460 'address-mask-reply' => 1,
461};
462
a332200b 463sub get_firewall_macros {
9aab3127 464
961b4928 465 return $pve_fw_parsed_macros if $pve_fw_parsed_macros;
6158271d 466
961b4928 467 $pve_fw_parsed_macros = {};
9aab3127 468
961b4928
DM		 469 foreach my $k (keys %$pve_fw_macros) {
470 my $name = lc($k);
a332200b 471
961b4928
DM		 472 my $macro = $pve_fw_macros->{$k};
473 $pve_fw_preferred_macro_names->{$name} = $k;
474 $pve_fw_parsed_macros->{$name} = $macro;
475 }
a332200b 476
961b4928 477 return $pve_fw_parsed_macros;
9aab3127
DM		 478}
479
fcba0beb
DM		 480my $etc_services;
481
482sub get_etc_services {
483
484 return $etc_services if $etc_services;
485
486 my $filename = "/etc/services";
487
488 my $fh = IO::File->new($filename, O_RDONLY);
489 if (!$fh) {
490 warn "unable to read '$filename' - $!\n";
491 return {};
492 }
493
494 my $services = {};
495
496 while (my $line = <$fh>) {
497 chomp ($line);
498 next if $line =~m/^#/;
499 next if ($line =~m/^\s*$/);
500
501 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
502 $services->{byid}->{$2}->{name} = $1;
35b66e9d 503 $services->{byid}->{$2}->{port} = $2;
fcba0beb
DM		 504 $services->{byid}->{$2}->{$3} = 1;
505 $services->{byname}->{$1} = $services->{byid}->{$2};
506 }
507 }
508
509 close($fh);
510
6158271d
DM		 511 $etc_services = $services;
512
3a616aa0 513
fcba0beb
DM		 514 return $etc_services;
515}
516
517my $etc_protocols;
518
519sub get_etc_protocols {
520 return $etc_protocols if $etc_protocols;
521
522 my $filename = "/etc/protocols";
523
524 my $fh = IO::File->new($filename, O_RDONLY);
525 if (!$fh) {
526 warn "unable to read '$filename' - $!\n";
527 return {};
528 }
529
530 my $protocols = {};
531
532 while (my $line = <$fh>) {
533 chomp ($line);
534 next if $line =~m/^#/;
535 next if ($line =~m/^\s*$/);
536
537 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
538 $protocols->{byid}->{$2}->{name} = $1;
539 $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
540 }
541 }
542
543 close($fh);
544
545 $etc_protocols = $protocols;
546
547 return $etc_protocols;
548}
549
ecbea048
DM		 550sub parse_address_list {
551 my ($str) = @_;
552
d6de1dc2 553 my $nbaor = 0;
ecbea048
DM		 554 foreach my $aor (split(/,/, $str)) {
555 if (!Net::IP->new($aor)) {
556 my $err = Net::IP::Error();
557 die "invalid IP address: $err\n";
d6de1dc2
AD		 558 }else{
559 $nbaor++;
ecbea048
DM		 560 }
561 }
d6de1dc2 562 return $nbaor;
ecbea048 563}
dddd9413 564
fcba0beb
DM		 565sub parse_port_name_number_or_range {
566 my ($str) = @_;
567
568 my $services = PVE::Firewall::get_etc_services();
4cdbb3b7 569 my $nbports = 0;
fcba0beb 570 foreach my $item (split(/,/, $str)) {
4cdbb3b7 571 my $portlist = "";
35b66e9d 572 my $oldpon = undef;
4b586518 573 $nbports++;
fcba0beb 574 foreach my $pon (split(':', $item, 2)) {
35b66e9d 575 $pon = $services->{byname}->{$pon}->{port} if $services->{byname}->{$pon}->{port};
4cdbb3b7 576 if ($pon =~ m/^\d+$/){
857f62c8 577 die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535;
35b66e9d
AD		 578 die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon);
579 $oldpon = $pon;
4cdbb3b7
AD		 580 }else{
581 die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon};
582 }
fcba0beb
DM		 583 }
584 }
585
4cdbb3b7 586 return ($nbports);
fcba0beb
DM		 587}
588
780bcc0f
DM		 589my $bridge_firewall_enabled = 0;
590
591sub enable_bridge_firewall {
592
593 return if $bridge_firewall_enabled; # only once
594
595 system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables");
596 system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-ip6tables");
597
598 $bridge_firewall_enabled = 1;
599}
600
8cebfa6f 601my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
dddd9413 602
3a616aa0
AD		 603sub iptables {
604 my ($cmd) = @_;
605
606 run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {});
607}
608
b16e818e
DM		 609sub iptables_restore_cmdlist {
610 my ($cmdlist) = @_;
3a616aa0 611
3fa83edf 612 run_command("/sbin/iptables-restore -n", input => $cmdlist);
3a616aa0
AD		 613}
614
de2a57cd
DM		 615sub iptables_get_chains {
616
617 my $res = {};
618
619 # check what chains we want to track
620 my $is_pvefw_chain = sub {
621 my $name = shift;
622
dec84fcd
DM		 623 return 1 if $name =~ m/^PVEFW-\S+$/;
624
de2a57cd 625 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
5927497d 626 return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT)$/;
f50656c2 627 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
de2a57cd
DM		 628
629 return undef;
630 };
631
632 my $table = '';
633
de2a57cd
DM		 634 my $parser = sub {
635 my $line = shift;
636
637 return if $line =~ m/^#/;
638 return if $line =~ m/^\s*$/;
639
640 if ($line =~ m/^\*(\S+)$/) {
641 $table = $1;
642 return;
643 }
644
645 return if $table ne 'filter';
646
647 if ($line =~ m/^:(\S+)\s/) {
648 my $chain = $1;
649 return if !&$is_pvefw_chain($chain);
3fa83edf 650 $res->{$chain} = "unknown";
09d5f68e 651 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
3fa83edf 652 my ($chain, $sig) = ($1, $2);
de2a57cd 653 return if !&$is_pvefw_chain($chain);
3fa83edf 654 $res->{$chain} = $sig;
de2a57cd
DM		 655 } else {
656 # simply ignore the rest
657 return;
658 }
659 };
660
661 run_command("/sbin/iptables-save", outfunc => $parser);
662
de2a57cd
DM		 663 return $res;
664}
665
3a616aa0
AD		 666sub iptables_chain_exist {
667 my ($chain) = @_;
668
669 eval{
670 iptables("-n --list $chain");
671 };
672 return undef if $@;
673
674 return 1;
675}
676
677sub iptables_rule_exist {
678 my ($rule) = @_;
679
680 eval{
681 iptables("-C $rule");
682 };
683 return undef if $@;
684
685 return 1;
686}
687
3fa83edf 688sub ruleset_generate_rule {
4e6112f9 689 my ($ruleset, $chain, $rule, $goto) = @_;
3a616aa0 690
3fa83edf 691 my $cmd = '';
3a616aa0 692
d6de1dc2 693 $cmd .= " -m iprange --src-range" if $rule->{nbsource} && $rule->{nbsource} > 1;
3a616aa0 694 $cmd .= " -s $rule->{source}" if $rule->{source};
d6de1dc2 695 $cmd .= " -m iprange --dst-range" if $rule->{nbdest} && $rule->{nbdest} > 1;
8c32a215 696 $cmd .= " -d $rule->{dest}" if $rule->{dest};
3a616aa0 697 $cmd .= " -p $rule->{proto}" if $rule->{proto};
4b586518
DM		 698
699 if (($rule->{nbdport} && $rule->{nbdport} > 1) ||
700 ($rule->{nbsport} && $rule->{nbsport} > 1)) {
701 $cmd .= " --match multiport"
702 }
703
704 if ($rule->{dport}) {
705 if ($rule->{proto} && $rule->{proto} eq 'icmp') {
706 # Note: we use dport to store --icmp-type
707 die "unknown icmp-type\n" if !$icmp_type_names->{$rule->{dport}};
708 $cmd .= " -m icmp --icmp-type $rule->{dport}";
709 } else {
710 if ($rule->{nbdport} && $rule->{nbdport} > 1) {
711 $cmd .= " --dports $rule->{dport}";
712 } else {
713 $cmd .= " --dport $rule->{dport}";
714 }
715 }
716 }
717
718 if ($rule->{sport}) {
719 if ($rule->{nbsport} && $rule->{nbsport} > 1) {
720 $cmd .= " --sports $rule->{sport}";
721 } else {
722 $cmd .= " --sport $rule->{sport}";
723 }
724 }
725
726 $cmd .= " -m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
4e6112f9
DM		 727
728 if (my $action = $rule->{action}) {
729 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
730 $cmd .= $goto ? " -g $action" : " -j $action";
731 };
3a616aa0 732
3fa83edf
DM		 733 ruleset_addrule($ruleset, $chain, $cmd) if $cmd;
734}
735
736sub ruleset_create_chain {
737 my ($ruleset, $chain) = @_;
3a616aa0 738
d050c724
DM		 739 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
740
3fa83edf
DM		 741 die "chain '$chain' already exists\n" if $ruleset->{$chain};
742
743 $ruleset->{$chain} = [];
3a616aa0
AD		 744}
745
3fa83edf
DM		 746sub ruleset_chain_exist {
747 my ($ruleset, $chain) = @_;
3a616aa0 748
3fa83edf
DM		 749 return $ruleset->{$chain} ? 1 : undef;
750}
3a616aa0 751
3fa83edf
DM		 752sub ruleset_addrule {
753 my ($ruleset, $chain, $rule) = @_;
3a616aa0 754
3fa83edf 755 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 756
3fa83edf
DM		 757 push @{$ruleset->{$chain}}, "-A $chain $rule";
758}
3a616aa0 759
3fa83edf
DM		 760sub ruleset_insertrule {
761 my ($ruleset, $chain, $rule) = @_;
3a616aa0 762
3fa83edf 763 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 764
3fa83edf
DM		 765 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
766}
3a616aa0 767
3fa83edf
DM		 768sub generate_bridge_chains {
769 my ($ruleset, $bridge) = @_;
3a616aa0 770
dec84fcd
DM		 771 if (!ruleset_chain_exist($ruleset, "PVEFW-FORWARD")){
772 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
7fab95bc 773 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
3a616aa0
AD		 774 }
775
5927497d
DM		 776 if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
777 ruleset_create_chain($ruleset, "$bridge-FW");
778 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
779 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
9fcad984
AD		 780 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j DROP"); # disable interbridge routing
781 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j DROP"); # disable interbridge routing
3fa83edf 782 }
3a616aa0 783
3fa83edf
DM		 784 if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
785 ruleset_create_chain($ruleset, "$bridge-OUT");
5927497d 786 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-in -j $bridge-OUT");
9fcad984
AD		 787 }
788
789 if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
790 ruleset_create_chain($ruleset, "$bridge-IN");
5927497d 791 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j $bridge-IN");
fdb0bf20 792 ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
3fa83edf
DM		 793 }
794}
3a616aa0
AD		 795
796sub generate_tap_rules_direction {
fa9c4a6f
DM		 797 my ($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, $direction) = @_;
798
799 my $rules = $vmfw_conf->{lc($direction)};
800 my $options = $vmfw_conf->{options};
3a616aa0
AD		 801
802 my $tapchain = "$iface-$direction";
803
3fa83edf 804 ruleset_create_chain($ruleset, $tapchain);
3a616aa0 805
7fab95bc
DM		 806 ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate INVALID -j DROP");
807 ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
3a616aa0 808
c29f55c9
DM		 809 if ($direction eq 'OUT' && defined($macaddr)) {
810 ruleset_addrule($ruleset, $tapchain, "-m mac ! --mac-source $macaddr -j DROP");
811 }
812
3fa83edf 813 if ($rules) {
3a616aa0
AD		 814 foreach my $rule (@$rules) {
815 next if $rule->{iface} && $rule->{iface} ne $netid;
bfbfa8b6 816 # we go to $bridge-IN if accept in out rules
3a616aa0 817 if($rule->{action} =~ m/^(GROUP-(\S+))$/){
3fa83edf
DM		 818 $rule->{action} .= "-$direction";
819 # generate empty group rule if don't exist
820 if(!ruleset_chain_exist($ruleset, $rule->{action})){
51bae274 821 generate_group_rules($ruleset, $group_rules, $2);
3fa83edf 822 }
4e6112f9 823 ruleset_generate_rule($ruleset, $tapchain, $rule);
7b291cab 824 ruleset_addrule($ruleset, $tapchain, "-m mark --mark 1 -j RETURN")
31ff3ef6 825 if $direction eq 'OUT';
4e6112f9 826 } else {
fdb0bf20 827 $rule->{action} = "PVEFW-SET-ACCEPT-MARK" if $rule->{action} eq 'ACCEPT' && $direction eq 'OUT';
4e6112f9 828 ruleset_generate_rule($ruleset, $tapchain, $rule);
3a616aa0 829 }
4e6112f9 830 }
3a616aa0
AD		 831 }
832
ccae0b50
DM		 833 # implement policy
834 my $policy;
835
836 if ($direction eq 'OUT') {
837 $policy = $options->{'policy-out'} || 'ACCEPT'; # allow everything by default
838 } else {
839 $policy = $options->{'policy-in'} || 'DROP'; # allow everything by default
840 }
841
842 if ($policy eq 'ACCEPT') {
843 if ($direction eq 'OUT') {
fdb0bf20 844 ruleset_addrule($ruleset, $tapchain, "-g PVEFW-SET-ACCEPT-MARK");
ccae0b50
DM		 845 } else {
846 ruleset_addrule($ruleset, $tapchain, "-j ACCEPT");
847 }
848 } elsif ($policy eq 'DROP') {
25c7b224 849 ruleset_addrule($ruleset, $tapchain, "-j PVEFW-Drop");
ccae0b50
DM		 850 ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-dropped: \" --log-level 4");
851 ruleset_addrule($ruleset, $tapchain, "-j DROP");
852 } elsif ($policy eq 'REJECT') {
25c7b224 853 ruleset_addrule($ruleset, $tapchain, "-j PVEFW-Reject");
ccae0b50 854 ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-reject: \" --log-level 4");
25c7b224 855 ruleset_addrule($ruleset, $tapchain, "-g PVEFW-reject");
ccae0b50
DM		 856 } else {
857 # should not happen
858 die "internal error: unknown policy '$policy'";
859 }
3a616aa0 860
3fa83edf
DM		 861 # plug the tap chain to bridge chain
862 my $physdevdirection = $direction eq 'IN' ? "out" : "in";
863 my $rule = "-m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain";
864 ruleset_insertrule($ruleset, "$bridge-$direction", $rule);
3a616aa0 865
3fa83edf
DM		 866 if ($direction eq 'OUT'){
867 # add tap->host rules
868 my $rule = "-m physdev --physdev-$physdevdirection $iface -j $tapchain";
dec84fcd 869 ruleset_addrule($ruleset, "PVEFW-INPUT", $rule);
3a616aa0
AD		 870 }
871}
872
0bd5f137 873sub enablehostfw {
51bae274 874 my ($ruleset, $rules, $group_rules) = @_;
0bd5f137 875
51bae274 876 # fixme: allow security groups
0bd5f137 877
3fa83edf 878 # host inbound firewall
dec84fcd
DM		 879 my $chain = "PVEFW-HOST-IN";
880 ruleset_create_chain($ruleset, $chain);
0bd5f137 881
7fab95bc
DM		 882 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
883 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
dec84fcd
DM		 884 ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
885 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
7fab95bc 886 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
dec84fcd 887 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 888
3fa83edf
DM		 889 if ($rules->{in}) {
890 foreach my $rule (@{$rules->{in}}) {
891 # we use RETURN because we need to check also tap rules
892 $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT';
dec84fcd 893 ruleset_generate_rule($ruleset, $chain, $rule);
3fa83edf 894 }
0bd5f137
AD		 895 }
896
dec84fcd
DM		 897 ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-IN dropped: \" --log-level 4");
898 ruleset_addrule($ruleset, $chain, "-j DROP");
0bd5f137 899
3fa83edf 900 # host outbound firewall
aadd745e 901 $chain = "PVEFW-HOST-OUT";
dec84fcd
DM		 902 ruleset_create_chain($ruleset, $chain);
903
7fab95bc
DM		 904 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
905 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
dec84fcd
DM		 906 ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
907 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
7fab95bc 908 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
dec84fcd 909 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 910
3fa83edf
DM		 911 if ($rules->{out}) {
912 foreach my $rule (@{$rules->{out}}) {
913 # we use RETURN because we need to check also tap rules
914 $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT';
dec84fcd 915 ruleset_generate_rule($ruleset, $chain, $rule);
3fa83edf 916 }
0bd5f137
AD		 917 }
918
dec84fcd
DM		 919 ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-OUT dropped: \" --log-level 4");
920 ruleset_addrule($ruleset, $chain, "-j DROP");
6158271d 921
dec84fcd
DM		 922 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
923 ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
9d31b418
AD		 924}
925
926sub generate_group_rules {
51bae274 927 my ($ruleset, $group_rules, $group) = @_;
9d31b418 928
51bae274 929 my $rules = $group_rules->{$group};
9d31b418 930
51bae274 931 die "no such security group '$group'\n" if !$rules;
6158271d 932
3fa83edf 933 my $chain = "GROUP-${group}-IN";
9d31b418 934
3fa83edf 935 ruleset_create_chain($ruleset, $chain);
9d31b418 936
3fa83edf
DM		 937 if ($rules->{in}) {
938 foreach my $rule (@{$rules->{in}}) {
939 ruleset_generate_rule($ruleset, $chain, $rule);
9d31b418
AD		 940 }
941 }
942
3fa83edf 943 $chain = "GROUP-${group}-OUT";
9d31b418 944
3fa83edf 945 ruleset_create_chain($ruleset, $chain);
4e6112f9 946 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
9d31b418 947
3fa83edf
DM		 948 if ($rules->{out}) {
949 foreach my $rule (@{$rules->{out}}) {
6158271d
DM		 950 # we go the PVEFW-SET-ACCEPT-MARK Instead of ACCEPT) because we need to
951 # check also other tap rules (and group rules can be set on any bridge,
4e6112f9
DM		 952 # so we can't go to VMBRXX-IN)
953 $rule->{action} = 'PVEFW-SET-ACCEPT-MARK' if $rule->{action} eq 'ACCEPT';
6a6c7af7 954 ruleset_generate_rule($ruleset, $chain, $rule);
9d31b418
AD		 955 }
956 }
9d31b418
AD		 957}
958
51bae274
DM		 959my $MAX_NETS = 32;
960my $valid_netdev_names = {};
961for (my $i = 0; $i < $MAX_NETS; $i++) {
962 $valid_netdev_names->{"net$i"} = 1;
963}
5e1267a5 964
51bae274
DM		 965sub parse_fw_rule {
966 my ($line, $need_iface, $allow_groups) = @_;
5e1267a5 967
a332200b 968 my $macros = get_firewall_macros();
fcba0beb 969 my $protocols = get_etc_protocols();
51bae274
DM		 970
971 my ($action, $iface, $source, $dest, $proto, $dport, $sport);
972
973 $line =~ s/#.*$//;
974
975 my @data = split(/\s+/, $line);
976 my $expected_elements = $need_iface ? 7 : 6;
977
978 die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
979
980 if ($need_iface) {
981 ($action, $iface, $source, $dest, $proto, $dport, $sport) = @data
982 } else {
983 ($action, $source, $dest, $proto, $dport, $sport) = @data;
984 }
985
986 die "incomplete rule\n" if !$action;
987
961b4928
DM		 988 my $macro;
989 my $macro_name;
990
51bae274
DM		 991 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
992 # OK
993 } elsif ($allow_groups && $action =~ m/^GROUP-(:?\S+)$/) {
994 # OK
995 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
961b4928
DM		 996 ($macro_name, $action) = ($1, $2);
997 my $lc_macro_name = lc($macro_name);
998 my $preferred_name = $pve_fw_preferred_macro_names->{$lc_macro_name};
999 $macro_name = $preferred_name if $preferred_name;
1000 $macro = $macros->{$lc_macro_name};
1001 die "unknown macro '$macro_name'\n" if !$macro;
51bae274
DM		 1002 } else {
1003 die "unknown action '$action'\n";
1004 }
1005
1006 if ($need_iface) {
1007 $iface = undef if $iface && $iface eq '-';
6158271d 1008 die "unknown interface '$iface'\n"
51bae274
DM		 1009 if defined($iface) && !$valid_netdev_names->{$iface};
1010 }
1011
1012 $proto = undef if $proto && $proto eq '-';
6158271d 1013 die "unknown protokol '$proto'\n" if $proto &&
51bae274
DM		 1014 !(defined($protocols->{byname}->{$proto}) ||
1015 defined($protocols->{byid}->{$proto}));
1016
1017 $source = undef if $source && $source eq '-';
1018 $dest = undef if $dest && $dest eq '-';
1019
1020 $dport = undef if $dport && $dport eq '-';
1021 $sport = undef if $sport && $sport eq '-';
1022
51bae274
DM		 1023 my $nbsource = undef;
1024 my $nbdest = undef;
1025
1026 $nbsource = parse_address_list($source) if $source;
1027 $nbdest = parse_address_list($dest) if $dest;
6158271d 1028
961b4928 1029 my $rules = [];
51bae274 1030
961b4928 1031 my $param = {
51bae274 1032 action => $action,
51bae274
DM		 1033 iface => $iface,
1034 source => $source,
1035 dest => $dest,
1036 nbsource => $nbsource,
1037 nbdest => $nbdest,
1038 proto => $proto,
1039 dport => $dport,
1040 sport => $sport,
51bae274 1041 };
961b4928
DM		 1042
1043 if ($macro) {
1044 foreach my $templ (@$macro) {
1045 my $rule = {};
1046 foreach my $k (keys %$templ) {
1047 my $v = $templ->{$k};
857f62c8
DM		 1048 if ($v eq 'PARAM') {
1049 $v = $param->{$k};
1050 } elsif ($v eq 'DEST') {
1051 $v = $param->{dest};
1052 } elsif ($v eq 'SOURCE') {
1053 $v = $param->{source};
1054 }
1055
961b4928
DM		 1056 die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
1057 $rule->{$k} = $v;
1058 }
1059 push @$rules, $rule;
1060 }
1061 } else {
1062 push @$rules, $param;
1063 }
1064
1065 foreach my $rule (@$rules) {
6158271d 1066 $rule->{nbdport} = parse_port_name_number_or_range($rule->{dport})
961b4928 1067 if defined($rule->{dport});
6158271d 1068 $rule->{nbsport} = parse_port_name_number_or_range($rule->{sport})
961b4928
DM		 1069 if defined($rule->{sport});
1070 }
1071
1072 return $rules;
51bae274
DM		 1073}
1074
85c6eaed
DM		 1075sub parse_fw_option {
1076 my ($line) = @_;
1077
1078 my ($opt, $value);
1079
1080 if ($line =~ m/^enable:\s*(0|1)\s*$/i) {
1081 $opt = 'enable';
1082 $value = int($1);
1083 } elsif ($line =~ m/^(policy-(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1084 $opt = lc($1);
1085 $value = uc($3);
1086 } else {
1087 chomp $line;
1088 die "can't parse option '$line'\n"
1089 }
1090
1091 return ($opt, $value);
1092}
1093
51bae274
DM		 1094sub parse_vm_fw_rules {
1095 my ($filename, $fh) = @_;
1096
85c6eaed 1097 my $res = { in => [], out => [], options => {}};
51bae274
DM		 1098
1099 my $section;
1100
5e1267a5
DM		 1101 while (defined(my $line = <$fh>)) {
1102 next if $line =~ m/^#/;
1103 next if $line =~ m/^\s*$/;
1104
961b4928
DM		 1105 my $linenr = $fh->input_line_number();
1106 my $prefix = "$filename (line $linenr)";
1107
85c6eaed 1108 if ($line =~ m/^\[(\S+)\]\s*$/i) {
5e1267a5 1109 $section = lc($1);
85c6eaed 1110 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
5e1267a5
DM		 1111 next;
1112 }
51bae274 1113 if (!$section) {
961b4928 1114 warn "$prefix: skip line - no section";
5e1267a5
DM		 1115 next;
1116 }
1117
85c6eaed
DM		 1118 next if !$res->{$section}; # skip undefined section
1119
1120 if ($section eq 'options') {
6158271d
DM		 1121 eval {
1122 my ($opt, $value) = parse_fw_option($line);
85c6eaed
DM		 1123 $res->{options}->{$opt} = $value;
1124 };
1125 warn "$prefix: $@" if $@;
1126 next;
1127 }
1128
961b4928
DM		 1129 my $rules;
1130 eval { $rules = parse_fw_rule($line, 1, 1); };
51bae274 1131 if (my $err = $@) {
961b4928 1132 warn "$prefix: $err";
5e1267a5
DM		 1133 next;
1134 }
1135
961b4928 1136 push @{$res->{$section}}, @$rules;
51bae274
DM		 1137 }
1138
1139 return $res;
1140}
1141
1142sub parse_host_fw_rules {
1143 my ($filename, $fh) = @_;
1144
1145 my $res = { in => [], out => [] };
1146
1147 my $section;
1148
1149 while (defined(my $line = <$fh>)) {
1150 next if $line =~ m/^#/;
1151 next if $line =~ m/^\s*$/;
1152
961b4928
DM		 1153 my $linenr = $fh->input_line_number();
1154 my $prefix = "$filename (line $linenr)";
1155
51bae274
DM		 1156 if ($line =~ m/^\[(in|out)\]\s*$/i) {
1157 $section = lc($1);
5e1267a5
DM		 1158 next;
1159 }
51bae274 1160 if (!$section) {
961b4928 1161 warn "$prefix: skip line - no section";
5e1267a5
DM		 1162 next;
1163 }
1164
961b4928
DM		 1165 my $rules;
1166 eval { $rules = parse_fw_rule($line, 1, 1); };
ecbea048 1167 if (my $err = $@) {
961b4928 1168 warn "$prefix: $err";
ecbea048 1169 next;
ecbea048
DM		 1170 }
1171
961b4928 1172 push @{$res->{$section}}, @$rules;
51bae274 1173 }
ecbea048 1174
51bae274
DM		 1175 return $res;
1176}
4cdbb3b7 1177
51bae274
DM		 1178sub parse_group_fw_rules {
1179 my ($filename, $fh) = @_;
5e1267a5 1180
51bae274
DM		 1181 my $section;
1182 my $group;
1183
1184 my $res = { in => [], out => [] };
6158271d 1185
51bae274
DM		 1186 while (defined(my $line = <$fh>)) {
1187 next if $line =~ m/^#/;
1188 next if $line =~ m/^\s*$/;
1189
961b4928
DM		 1190 my $linenr = $fh->input_line_number();
1191 my $prefix = "$filename (line $linenr)";
1192
51bae274
DM		 1193 if ($line =~ m/^\[(in|out):(\S+)\]\s*$/i) {
1194 $section = lc($1);
1195 $group = lc($2);
1196 next;
1197 }
1198 if (!$section || !$group) {
961b4928 1199 warn "$prefix: skip line - no section";
51bae274
DM		 1200 next;
1201 }
1202
961b4928
DM		 1203 my $rules;
1204 eval { $rules = parse_fw_rule($line, 0, 0); };
51bae274 1205 if (my $err = $@) {
961b4928 1206 warn "$prefix: $err";
51bae274
DM		 1207 next;
1208 }
1209
961b4928 1210 push @{$res->{$group}->{$section}}, @$rules;
5e1267a5
DM		 1211 }
1212
1213 return $res;
1214}
1215
06320eb0
DM		 1216sub run_locked {
1217 my ($code, @param) = @_;
1218
1219 my $timeout = 10;
1220
1221 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
1222
1223 die $@ if $@;
1224
1225 return $res;
1226}
1227
5e1267a5
DM		 1228sub read_local_vm_config {
1229
1230 my $openvz = {};
1231
1232 my $qemu = {};
1233
1234 my $list = PVE::QemuServer::config_list();
1235
1236 foreach my $vmid (keys %$list) {
5e1267a5
DM		 1237 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
1238 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1239 $qemu->{$vmid} = $conf;
1240 }
1241 }
1242
1243 my $vmdata = { openvz => $openvz, qemu => $qemu };
1244
1245 return $vmdata;
1246};
1247
1248sub read_vm_firewall_rules {
1249 my ($vmdata) = @_;
1250 my $rules = {};
1251 foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
1252 my $filename = "/etc/pve/firewall/$vmid.fw";
1253 my $fh = IO::File->new($filename, O_RDONLY);
1254 next if !$fh;
1255
51bae274 1256 $rules->{$vmid} = parse_vm_fw_rules($filename, $fh);
5e1267a5
DM		 1257 }
1258
1259 return $rules;
1260}
1261
d8f2505e
DM		 1262sub generate_std_chains {
1263 my ($ruleset) = @_;
1264
1265 foreach my $chain (keys %$pve_std_chains) {
1266 ruleset_create_chain($ruleset, $chain);
1267 foreach my $rule (@{$pve_std_chains->{$chain}}) {
1268 if (ref($rule)) {
1269 ruleset_generate_rule($ruleset, $chain, $rule);
1270 } else {
1271 ruleset_addrule($ruleset, $chain, $rule);
1272 }
1273 }
1274 }
1275}
1276
5e1267a5 1277sub compile {
5e1267a5
DM		 1278 my $vmdata = read_local_vm_config();
1279 my $rules = read_vm_firewall_rules($vmdata);
6158271d 1280
51bae274
DM		 1281 my $group_rules = {};
1282 my $filename = "/etc/pve/firewall/groups.fw";
1283 if (my $fh = IO::File->new($filename, O_RDONLY)) {
1284 $group_rules = parse_group_fw_rules($filename, $fh);
1285 }
5e1267a5 1286
3fa83edf
DM		 1287 #print Dumper($rules);
1288
1289 my $ruleset = {};
1290
dec84fcd
DM		 1291 ruleset_create_chain($ruleset, "PVEFW-INPUT");
1292 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
fadb13dd 1293 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3fa83edf 1294
d8f2505e 1295 generate_std_chains($ruleset);
4e6112f9 1296
fadb13dd 1297 my $enable_hostfw = 0;
51bae274
DM		 1298 $filename = "/etc/pve/local/host.fw";
1299 if (my $fh = IO::File->new($filename, O_RDONLY)) {
1300 my $host_rules = parse_host_fw_rules($filename, $fh);
fadb13dd
DM		 1301
1302 $enable_hostfw = 1;
1303
51bae274
DM		 1304 enablehostfw($ruleset, $host_rules, $group_rules);
1305 }
3fa83edf 1306
6158271d 1307 # generate firewall rules for QEMU VMs
3fa83edf
DM		 1308 foreach my $vmid (keys %{$vmdata->{qemu}}) {
1309 my $conf = $vmdata->{qemu}->{$vmid};
fa9c4a6f
DM		 1310 my $vmfw_conf = $rules->{$vmid};
1311 next if !$vmfw_conf;
1312 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
3fa83edf
DM		 1313
1314 foreach my $netid (keys %$conf) {
1315 next if $netid !~ m/^net(\d+)$/;
1316 my $net = PVE::QemuServer::parse_net($conf->{$netid});
1317 next if !$net;
1318 my $iface = "tap${vmid}i$1";
5e1267a5 1319
3fa83edf
DM		 1320 my $bridge = $net->{bridge};
1321 next if !$bridge; # fixme: ?
1322
1323 $bridge .= "v$net->{tag}" if $net->{tag};
1324
fadb13dd 1325
3fa83edf
DM		 1326 generate_bridge_chains($ruleset, $bridge);
1327
c29f55c9 1328 my $macaddr = $net->{macaddr};
fa9c4a6f
DM		 1329 generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'IN');
1330 generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'OUT');
3fa83edf
DM		 1331 }
1332 }
c0413e35 1333
fadb13dd
DM		 1334 if ($enable_hostfw) {
1335 # allow traffic from lo (ourself)
1336 ruleset_addrule($ruleset, "PVEFW-INPUT", "-i lo -j ACCEPT");
1337 }
c0413e35 1338
3fa83edf
DM		 1339 return $ruleset;
1340}
1341
1342sub get_ruleset_status {
1343 my ($ruleset, $verbose) = @_;
1344
1345 my $active_chains = iptables_get_chains();
1346
1347 my $statushash = {};
1348
1349 foreach my $chain (sort keys %$ruleset) {
09d5f68e 1350 my $digest = Digest::SHA->new('sha1');
3fa83edf
DM		 1351 foreach my $cmd (@{$ruleset->{$chain}}) {
1352 $digest->add("$cmd\n");
1353 }
1354 my $sig = $digest->b64digest;
1355 $statushash->{$chain}->{sig} = $sig;
1356
1357 my $oldsig = $active_chains->{$chain};
1358 if (!defined($oldsig)) {
1359 $statushash->{$chain}->{action} = 'create';
1360 } else {
1361 if ($oldsig eq $sig) {
1362 $statushash->{$chain}->{action} = 'exists';
1363 } else {
1364 $statushash->{$chain}->{action} = 'update';
1365 }
1366 }
1367 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
1368 foreach my $cmd (@{$ruleset->{$chain}}) {
1369 print "\t$cmd\n" if $verbose;
1370 }
1371 }
1372
1373 foreach my $chain (sort keys %$active_chains) {
1374 if (!defined($ruleset->{$chain})) {
1375 my $sig = $active_chains->{$chain};
1376 $statushash->{$chain}->{action} = 'delete';
1377 $statushash->{$chain}->{sig} = $sig;
1378 print "delete $chain ($sig)\n" if $verbose;
1379 }
6158271d 1380 }
3fa83edf
DM		 1381
1382 return $statushash;
1383}
1384
1385sub print_ruleset {
1386 my ($ruleset) = @_;
1387
1388 get_ruleset_status($ruleset, 1);
1389}
1390
1391sub print_sig_rule {
1392 my ($chain, $sig) = @_;
1393
09d5f68e
DM		 1394 # We just use this to store a SHA1 checksum used to detect changes
1395 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
b6360c3f
DM		 1396}
1397
a84f4d96
DM		 1398sub apply_ruleset {
1399 my ($ruleset, $verbose) = @_;
3fa83edf 1400
a84f4d96 1401 enable_bridge_firewall();
3fa83edf
DM		 1402
1403 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
1404
1405 my $statushash = get_ruleset_status($ruleset, $verbose);
1406
1407 # create missing chains first
1408 foreach my $chain (sort keys %$ruleset) {
1409 my $stat = $statushash->{$chain};
1410 die "internal error" if !$stat;
1411 next if $stat->{action} ne 'create';
886aba9c 1412
3fa83edf
DM		 1413 $cmdlist .= ":$chain - [0:0]\n";
1414 }
1415
dec84fcd 1416 my $rule = "INPUT -j PVEFW-INPUT";
3fa83edf
DM		 1417 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1418 $cmdlist .= "-A $rule\n";
1419 }
dec84fcd 1420 $rule = "OUTPUT -j PVEFW-OUTPUT";
3fa83edf
DM		 1421 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1422 $cmdlist .= "-A $rule\n";
1423 }
1424
dec84fcd 1425 $rule = "FORWARD -j PVEFW-FORWARD";
3fa83edf
DM		 1426 if (!PVE::Firewall::iptables_rule_exist($rule)) {
1427 $cmdlist .= "-A $rule\n";
1428 }
1429
1430 foreach my $chain (sort keys %$ruleset) {
1431 my $stat = $statushash->{$chain};
1432 die "internal error" if !$stat;
1433
1434 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
1435 $cmdlist .= "-F $chain\n";
1436 foreach my $cmd (@{$ruleset->{$chain}}) {
1437 $cmdlist .= "$cmd\n";
1438 }
1439 $cmdlist .= print_sig_rule($chain, $stat->{sig});
1440 } elsif ($stat->{action} eq 'delete') {
f5d28682 1441 die "internal error"; # this should not happen
3fa83edf
DM		 1442 } elsif ($stat->{action} eq 'exists') {
1443 # do nothing
1444 } else {
1445 die "internal error - unknown status '$stat->{action}'";
1446 }
1447 }
1448
f5d28682
DM		 1449 foreach my $chain (keys %$statushash) {
1450 next if $statushash->{$chain}->{action} ne 'delete';
1451 $cmdlist .= "-F $chain\n";
1452 }
1453 foreach my $chain (keys %$statushash) {
1454 next if $statushash->{$chain}->{action} ne 'delete';
fadb13dd
DM		 1455 next if $chain eq 'PVEFW-INPUT';
1456 next if $chain eq 'PVEFW-OUTPUT';
1457 next if $chain eq 'PVEFW-FORWARD';
f5d28682
DM		 1458 $cmdlist .= "-X $chain\n";
1459 }
1460
3fa83edf
DM		 1461 $cmdlist .= "COMMIT\n";
1462
1463 print $cmdlist if $verbose;
1464
1465 iptables_restore_cmdlist($cmdlist);
1466
6158271d 1467 # test: re-read status and check if everything is up to date
3fa83edf
DM		 1468 $statushash = get_ruleset_status($ruleset);
1469
1470 my $errors;
1471 foreach my $chain (sort keys %$ruleset) {
1472 my $stat = $statushash->{$chain};
1473 if ($stat->{action} ne 'exists') {
1474 warn "unable to update chain '$chain'\n";
1475 $errors = 1;
1476 }
1477 }
b6360c3f 1478
3fa83edf 1479 die "unable to apply firewall changes\n" if $errors;
b6360c3f
DM		 1480}
1481
b6360c3f 14821;
Firewall test scripts