Commit | Line | Data |
---|---|---|
b6360c3f DM |
1 | package PVE::Firewall; |
2 | ||
3 | use warnings; | |
4 | use strict; | |
5 | use Data::Dumper; | |
09d5f68e | 6 | use Digest::SHA; |
5f0a912c | 7 | use PVE::ProcFSTools; |
f789653a | 8 | use PVE::Tools; |
b6360c3f | 9 | use PVE::QemuServer; |
6b9f68a2 | 10 | use File::Basename; |
5e1267a5 DM |
11 | use File::Path; |
12 | use IO::File; | |
ecbea048 | 13 | use Net::IP; |
06320eb0 | 14 | use PVE::Tools qw(run_command lock_file); |
ecbea048 | 15 | |
5e1267a5 | 16 | use Data::Dumper; |
b6360c3f | 17 | |
06320eb0 | 18 | my $pve_fw_lock_filename = "/var/lock/pvefw.lck"; |
6b9f68a2 | 19 | my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status"; |
06320eb0 | 20 | |
2d404ffc DM |
21 | my $default_log_level = 'info'; |
22 | ||
23 | my $log_level_hash = { | |
24 | debug => 7, | |
25 | info => 6, | |
26 | notice => 5, | |
27 | warning => 4, | |
28 | err => 3, | |
29 | crit => 2, | |
30 | alert => 1, | |
31 | emerg => 0, | |
32 | }; | |
33 | ||
857f62c8 | 34 | # imported/converted from: /usr/share/shorewall/macro.* |
961b4928 | 35 | my $pve_fw_macros = { |
857f62c8 DM |
36 | 'Amanda' => [ |
37 | { action => 'PARAM', proto => 'udp', dport => '10080' }, | |
38 | { action => 'PARAM', proto => 'tcp', dport => '10080' }, | |
39 | ], | |
40 | 'Auth' => [ | |
41 | { action => 'PARAM', proto => 'tcp', dport => '113' }, | |
42 | ], | |
43 | 'BGP' => [ | |
44 | { action => 'PARAM', proto => 'tcp', dport => '179' }, | |
45 | ], | |
46 | 'BitTorrent' => [ | |
961b4928 | 47 | { action => 'PARAM', proto => 'tcp', dport => '6881:6889' }, |
857f62c8 DM |
48 | { action => 'PARAM', proto => 'udp', dport => '6881' }, |
49 | ], | |
50 | 'BitTorrent32' => [ | |
51 | { action => 'PARAM', proto => 'tcp', dport => '6881:6999' }, | |
52 | { action => 'PARAM', proto => 'udp', dport => '6881' }, | |
53 | ], | |
54 | 'CVS' => [ | |
55 | { action => 'PARAM', proto => 'tcp', dport => '2401' }, | |
56 | ], | |
57 | 'Citrix' => [ | |
58 | { action => 'PARAM', proto => 'tcp', dport => '1494' }, | |
59 | { action => 'PARAM', proto => 'udp', dport => '1604' }, | |
60 | { action => 'PARAM', proto => 'tcp', dport => '2598' }, | |
61 | ], | |
62 | 'DAAP' => [ | |
63 | { action => 'PARAM', proto => 'tcp', dport => '3689' }, | |
64 | { action => 'PARAM', proto => 'udp', dport => '3689' }, | |
65 | ], | |
66 | 'DCC' => [ | |
67 | { action => 'PARAM', proto => 'tcp', dport => '6277' }, | |
68 | ], | |
69 | 'DHCPfwd' => [ | |
70 | { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' }, | |
71 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' }, | |
72 | ], | |
73 | 'DNS' => [ | |
74 | { action => 'PARAM', proto => 'udp', dport => '53' }, | |
75 | { action => 'PARAM', proto => 'tcp', dport => '53' }, | |
76 | ], | |
77 | 'Distcc' => [ | |
78 | { action => 'PARAM', proto => 'tcp', dport => '3632' }, | |
79 | ], | |
80 | 'Edonkey' => [ | |
81 | { action => 'PARAM', proto => 'tcp', dport => '4662' }, | |
82 | { action => 'PARAM', proto => 'udp', dport => '4665' }, | |
961b4928 | 83 | ], |
857f62c8 DM |
84 | 'FTP' => [ |
85 | { action => 'PARAM', proto => 'tcp', dport => '21' }, | |
86 | ], | |
87 | 'Finger' => [ | |
88 | { action => 'PARAM', proto => 'tcp', dport => '79' }, | |
89 | ], | |
90 | 'GNUnet' => [ | |
91 | { action => 'PARAM', proto => 'tcp', dport => '2086' }, | |
92 | { action => 'PARAM', proto => 'udp', dport => '2086' }, | |
93 | { action => 'PARAM', proto => 'tcp', dport => '1080' }, | |
94 | { action => 'PARAM', proto => 'udp', dport => '1080' }, | |
95 | ], | |
96 | 'GRE' => [ | |
97 | { action => 'PARAM', proto => '47' }, | |
98 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' }, | |
99 | ], | |
100 | 'Git' => [ | |
101 | { action => 'PARAM', proto => 'tcp', dport => '9418' }, | |
102 | ], | |
103 | 'Gnutella' => [ | |
104 | { action => 'PARAM', proto => 'tcp', dport => '6346' }, | |
105 | { action => 'PARAM', proto => 'udp', dport => '6346' }, | |
106 | ], | |
107 | 'HKP' => [ | |
108 | { action => 'PARAM', proto => 'tcp', dport => '11371' }, | |
109 | ], | |
110 | 'HTTP' => [ | |
961b4928 DM |
111 | { action => 'PARAM', proto => 'tcp', dport => '80' }, |
112 | ], | |
857f62c8 DM |
113 | 'HTTPS' => [ |
114 | { action => 'PARAM', proto => 'tcp', dport => '443' }, | |
115 | ], | |
116 | 'ICPV2' => [ | |
117 | { action => 'PARAM', proto => 'udp', dport => '3130' }, | |
118 | ], | |
119 | 'ICQ' => [ | |
120 | { action => 'PARAM', proto => 'tcp', dport => '5190' }, | |
121 | ], | |
122 | 'IMAP' => [ | |
123 | { action => 'PARAM', proto => 'tcp', dport => '143' }, | |
124 | ], | |
125 | 'IMAPS' => [ | |
126 | { action => 'PARAM', proto => 'tcp', dport => '993' }, | |
127 | ], | |
128 | 'IPIP' => [ | |
129 | { action => 'PARAM', proto => '94' }, | |
130 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' }, | |
131 | ], | |
132 | 'IPP' => [ | |
133 | { action => 'PARAM', proto => 'tcp', dport => '631' }, | |
134 | ], | |
135 | 'IPPbrd' => [ | |
136 | { action => 'PARAM', proto => 'udp', dport => '631' }, | |
137 | ], | |
138 | 'IPPserver' => [ | |
139 | { action => 'PARAM', source => 'SOURCE', dest => 'DEST', proto => 'tcp', dport => '631' }, | |
140 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '631' }, | |
141 | ], | |
142 | 'IPsec' => [ | |
143 | { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' }, | |
144 | { action => 'PARAM', proto => '50' }, | |
145 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' }, | |
146 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' }, | |
147 | ], | |
148 | 'IPsecah' => [ | |
149 | { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' }, | |
150 | { action => 'PARAM', proto => '51' }, | |
151 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' }, | |
152 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' }, | |
153 | ], | |
154 | 'IPsecnat' => [ | |
155 | { action => 'PARAM', proto => 'udp', dport => '500' }, | |
156 | { action => 'PARAM', proto => 'udp', dport => '4500' }, | |
157 | { action => 'PARAM', proto => '50' }, | |
158 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' }, | |
159 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' }, | |
160 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' }, | |
161 | ], | |
162 | 'IRC' => [ | |
163 | { action => 'PARAM', proto => 'tcp', dport => '6667' }, | |
164 | ], | |
165 | 'JabberPlain' => [ | |
166 | { action => 'PARAM', proto => 'tcp', dport => '5222' }, | |
167 | ], | |
168 | 'JabberSecure' => [ | |
169 | { action => 'PARAM', proto => 'tcp', dport => '5223' }, | |
170 | ], | |
171 | 'Jabberd' => [ | |
172 | { action => 'PARAM', proto => 'tcp', dport => '5269' }, | |
173 | ], | |
174 | 'Jetdirect' => [ | |
175 | { action => 'PARAM', proto => 'tcp', dport => '9100' }, | |
176 | ], | |
177 | 'L2TP' => [ | |
178 | { action => 'PARAM', proto => 'udp', dport => '1701' }, | |
179 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' }, | |
180 | ], | |
181 | 'LDAP' => [ | |
182 | { action => 'PARAM', proto => 'tcp', dport => '389' }, | |
183 | ], | |
184 | 'LDAPS' => [ | |
185 | { action => 'PARAM', proto => 'tcp', dport => '636' }, | |
186 | ], | |
187 | 'MSNP' => [ | |
188 | { action => 'PARAM', proto => 'tcp', dport => '1863' }, | |
189 | ], | |
190 | 'MSSQL' => [ | |
191 | { action => 'PARAM', proto => 'tcp', dport => '1433' }, | |
192 | ], | |
193 | 'Mail' => [ | |
194 | { action => 'PARAM', proto => 'tcp', dport => '25' }, | |
195 | { action => 'PARAM', proto => 'tcp', dport => '465' }, | |
196 | { action => 'PARAM', proto => 'tcp', dport => '587' }, | |
197 | ], | |
198 | 'Munin' => [ | |
199 | { action => 'PARAM', proto => 'tcp', dport => '4949' }, | |
200 | ], | |
201 | 'MySQL' => [ | |
202 | { action => 'PARAM', proto => 'tcp', dport => '3306' }, | |
203 | ], | |
204 | 'NNTP' => [ | |
205 | { action => 'PARAM', proto => 'tcp', dport => '119' }, | |
206 | ], | |
207 | 'NNTPS' => [ | |
208 | { action => 'PARAM', proto => 'tcp', dport => '563' }, | |
209 | ], | |
210 | 'NTP' => [ | |
211 | { action => 'PARAM', proto => 'udp', dport => '123' }, | |
212 | ], | |
213 | 'NTPbi' => [ | |
214 | { action => 'PARAM', proto => 'udp', dport => '123' }, | |
215 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' }, | |
216 | ], | |
217 | 'NTPbrd' => [ | |
218 | { action => 'PARAM', proto => 'udp', dport => '123' }, | |
219 | { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '123' }, | |
220 | ], | |
221 | 'OSPF' => [ | |
222 | { action => 'PARAM', proto => '89' }, | |
223 | ], | |
224 | 'OpenVPN' => [ | |
225 | { action => 'PARAM', proto => 'udp', dport => '1194' }, | |
226 | ], | |
227 | 'PCA' => [ | |
228 | { action => 'PARAM', proto => 'udp', dport => '5632' }, | |
229 | { action => 'PARAM', proto => 'tcp', dport => '5631' }, | |
230 | ], | |
231 | 'POP3' => [ | |
232 | { action => 'PARAM', proto => 'tcp', dport => '110' }, | |
233 | ], | |
234 | 'POP3S' => [ | |
235 | { action => 'PARAM', proto => 'tcp', dport => '995' }, | |
236 | ], | |
237 | 'PPtP' => [ | |
238 | { action => 'PARAM', proto => '47' }, | |
239 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' }, | |
240 | { action => 'PARAM', proto => 'tcp', dport => '1723' }, | |
241 | ], | |
242 | 'Ping' => [ | |
269d4f13 | 243 | { action => 'PARAM', proto => 'icmp', dport => 'echo-request' }, |
857f62c8 DM |
244 | ], |
245 | 'PostgreSQL' => [ | |
246 | { action => 'PARAM', proto => 'tcp', dport => '5432' }, | |
247 | ], | |
248 | 'Printer' => [ | |
249 | { action => 'PARAM', proto => 'tcp', dport => '515' }, | |
250 | ], | |
251 | 'RDP' => [ | |
252 | { action => 'PARAM', proto => 'tcp', dport => '3389' }, | |
253 | ], | |
254 | 'RIPbi' => [ | |
255 | { action => 'PARAM', proto => 'udp', dport => '520' }, | |
256 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' }, | |
257 | ], | |
258 | 'RNDC' => [ | |
259 | { action => 'PARAM', proto => 'tcp', dport => '953' }, | |
260 | ], | |
261 | 'Razor' => [ | |
262 | { action => 'ACCEPT', proto => 'tcp', dport => '2703' }, | |
263 | ], | |
264 | 'Rdate' => [ | |
265 | { action => 'PARAM', proto => 'tcp', dport => '37' }, | |
266 | ], | |
267 | 'Rsync' => [ | |
268 | { action => 'PARAM', proto => 'tcp', dport => '873' }, | |
269 | ], | |
270 | 'SANE' => [ | |
271 | { action => 'PARAM', proto => 'tcp', dport => '6566' }, | |
272 | ], | |
273 | 'SMB' => [ | |
274 | { action => 'PARAM', proto => 'udp', dport => '135,445' }, | |
275 | { action => 'PARAM', proto => 'udp', dport => '137:139' }, | |
276 | { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' }, | |
277 | { action => 'PARAM', proto => 'tcp', dport => '135,139,445' }, | |
278 | ], | |
279 | 'SMBBI' => [ | |
280 | { action => 'PARAM', proto => 'udp', dport => '135,445' }, | |
281 | { action => 'PARAM', proto => 'udp', dport => '137:139' }, | |
282 | { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' }, | |
283 | { action => 'PARAM', proto => 'tcp', dport => '135,139,445' }, | |
284 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' }, | |
285 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' }, | |
286 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' }, | |
287 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' }, | |
288 | ], | |
289 | 'SMBswat' => [ | |
290 | { action => 'PARAM', proto => 'tcp', dport => '901' }, | |
291 | ], | |
292 | 'SMTP' => [ | |
293 | { action => 'PARAM', proto => 'tcp', dport => '25' }, | |
294 | ], | |
295 | 'SMTPS' => [ | |
296 | { action => 'PARAM', proto => 'tcp', dport => '465' }, | |
297 | ], | |
298 | 'SNMP' => [ | |
299 | { action => 'PARAM', proto => 'udp', dport => '161:162' }, | |
300 | { action => 'PARAM', proto => 'tcp', dport => '161' }, | |
301 | ], | |
302 | 'SPAMD' => [ | |
303 | { action => 'PARAM', proto => 'tcp', dport => '783' }, | |
304 | ], | |
305 | 'SSH' => [ | |
306 | { action => 'PARAM', proto => 'tcp', dport => '22' }, | |
307 | ], | |
308 | 'SVN' => [ | |
309 | { action => 'PARAM', proto => 'tcp', dport => '3690' }, | |
310 | ], | |
311 | 'SixXS' => [ | |
312 | { action => 'PARAM', proto => 'tcp', dport => '3874' }, | |
313 | { action => 'PARAM', proto => 'udp', dport => '3740' }, | |
314 | { action => 'PARAM', proto => '41' }, | |
315 | { action => 'PARAM', proto => 'udp', dport => '5072,8374' }, | |
316 | ], | |
317 | 'Squid' => [ | |
318 | { action => 'PARAM', proto => 'tcp', dport => '3128' }, | |
319 | ], | |
320 | 'Submission' => [ | |
321 | { action => 'PARAM', proto => 'tcp', dport => '587' }, | |
322 | ], | |
323 | 'Syslog' => [ | |
324 | { action => 'PARAM', proto => 'udp', dport => '514' }, | |
325 | { action => 'PARAM', proto => 'tcp', dport => '514' }, | |
326 | ], | |
327 | 'TFTP' => [ | |
328 | { action => 'PARAM', proto => 'udp', dport => '69' }, | |
329 | ], | |
330 | 'Telnet' => [ | |
331 | { action => 'PARAM', proto => 'tcp', dport => '23' }, | |
332 | ], | |
333 | 'Telnets' => [ | |
334 | { action => 'PARAM', proto => 'tcp', dport => '992' }, | |
335 | ], | |
336 | 'Time' => [ | |
337 | { action => 'PARAM', proto => 'tcp', dport => '37' }, | |
338 | ], | |
339 | 'Trcrt' => [ | |
340 | { action => 'PARAM', proto => 'udp', dport => '33434:33524' }, | |
269d4f13 | 341 | { action => 'PARAM', proto => 'icmp', dport => 'echo-request' }, |
857f62c8 DM |
342 | ], |
343 | 'VNC' => [ | |
344 | { action => 'PARAM', proto => 'tcp', dport => '5900:5909' }, | |
345 | ], | |
346 | 'VNCL' => [ | |
347 | { action => 'PARAM', proto => 'tcp', dport => '5500' }, | |
348 | ], | |
349 | 'Web' => [ | |
350 | { action => 'PARAM', proto => 'tcp', dport => '80' }, | |
961b4928 DM |
351 | { action => 'PARAM', proto => 'tcp', dport => '443' }, |
352 | ], | |
857f62c8 DM |
353 | 'Webcache' => [ |
354 | { action => 'PARAM', proto => 'tcp', dport => '8080' }, | |
355 | ], | |
356 | 'Webmin' => [ | |
357 | { action => 'PARAM', proto => 'tcp', dport => '10000' }, | |
358 | ], | |
359 | 'Whois' => [ | |
360 | { action => 'PARAM', proto => 'tcp', dport => '43' }, | |
361 | ], | |
961b4928 DM |
362 | }; |
363 | ||
364 | my $pve_fw_parsed_macros; | |
365 | my $pve_fw_preferred_macro_names = {}; | |
3a616aa0 | 366 | |
d8f2505e DM |
367 | my $pve_std_chains = { |
368 | 'PVEFW-SET-ACCEPT-MARK' => [ | |
369 | "-j MARK --set-mark 1", | |
370 | ], | |
79929d9c DM |
371 | 'PVEFW-DropBroadcast' => [ |
372 | # same as shorewall 'Broadcast' | |
373 | # simply DROP BROADCAST/MULTICAST/ANYCAST | |
374 | # we can use this to reduce logging | |
375 | { action => 'DROP', dsttype => 'BROADCAST' }, | |
376 | { action => 'DROP', dsttype => 'MULTICAST' }, | |
377 | { action => 'DROP', dsttype => 'ANYCAST' }, | |
378 | { action => 'DROP', dest => '224.0.0.0/4' }, | |
379 | ], | |
380 | 'PVEFW-reject' => [ | |
381 | # same as shorewall 'reject' | |
382 | { action => 'DROP', dsttype => 'BROADCAST' }, | |
383 | { action => 'DROP', source => '224.0.0.0/4' }, | |
384 | { action => 'DROP', proto => 'icmp' }, | |
385 | "-p tcp -j REJECT --reject-with tcp-reset", | |
386 | "-p udp -j REJECT --reject-with icmp-port-unreachable", | |
387 | "-p icmp -j REJECT --reject-with icmp-host-unreachable", | |
388 | "-j REJECT --reject-with icmp-host-prohibited", | |
389 | ], | |
390 | 'PVEFW-Drop' => [ | |
391 | # same as shorewall 'Drop', which is equal to DROP, | |
392 | # but REJECT/DROP some packages to reduce logging, | |
393 | # and ACCEPT critical ICMP types | |
394 | { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth' | |
395 | # we are not interested in BROADCAST/MULTICAST/ANYCAST | |
396 | { action => 'PVEFW-DropBroadcast' }, | |
397 | # ACCEPT critical ICMP types | |
398 | { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' }, | |
399 | { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' }, | |
400 | # Drop packets with INVALID state | |
401 | "-m conntrack --ctstate INVALID -j DROP", | |
402 | # Drop Microsoft SMB noise | |
403 | { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 }, | |
404 | { action => 'DROP', proto => 'udp', dport => '137:139'}, | |
405 | { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 }, | |
406 | { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 }, | |
407 | { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP | |
408 | # Drop new/NotSyn traffic so that it doesn't get logged | |
409 | "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP", | |
410 | # Drop DNS replies | |
411 | { action => 'DROP', proto => 'udp', sport => 53 }, | |
412 | ], | |
413 | 'PVEFW-Reject' => [ | |
414 | # same as shorewall 'Reject', which is equal to Reject, | |
415 | # but REJECT/DROP some packages to reduce logging, | |
416 | # and ACCEPT critical ICMP types | |
417 | { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth' | |
418 | # we are not interested in BROADCAST/MULTICAST/ANYCAST | |
419 | { action => 'PVEFW-DropBroadcast' }, | |
420 | # ACCEPT critical ICMP types | |
421 | { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' }, | |
422 | { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' }, | |
423 | # Drop packets with INVALID state | |
424 | "-m conntrack --ctstate INVALID -j DROP", | |
425 | # Drop Microsoft SMB noise | |
426 | { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 }, | |
427 | { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'}, | |
428 | { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 }, | |
429 | { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 }, | |
430 | { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP | |
431 | # Drop new/NotSyn traffic so that it doesn't get logged | |
432 | "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP", | |
433 | # Drop DNS replies | |
434 | { action => 'DROP', proto => 'udp', sport => 53 }, | |
435 | ], | |
d86659ef DM |
436 | 'PVEFW-tcpflags' => [ |
437 | # same as shorewall tcpflags action. | |
438 | # Packets arriving on this interface are checked for som illegal combinations of TCP flags | |
439 | "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags", | |
440 | "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags", | |
441 | "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags", | |
442 | "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags", | |
443 | "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags", | |
444 | ], | |
bee633ab DM |
445 | 'PVEFW-smurfs' => [ |
446 | # same as shorewall smurfs action | |
447 | # Filter packets for smurfs (packets with a broadcast address as the source). | |
448 | "-s 0.0.0.0/32 -j RETURN", | |
449 | "-m addrtype --src-type BROADCAST -g PVEFW-smurflog", | |
450 | "-s 224.0.0.0/4 -g PVEFW-smurflog", | |
451 | ], | |
d8f2505e DM |
452 | }; |
453 | ||
4b586518 DM |
454 | # iptables -p icmp -h |
455 | my $icmp_type_names = { | |
456 | any => 1, | |
457 | 'echo-reply' => 1, | |
458 | 'destination-unreachable' => 1, | |
459 | 'network-unreachable' => 1, | |
460 | 'host-unreachable' => 1, | |
461 | 'protocol-unreachable' => 1, | |
462 | 'port-unreachable' => 1, | |
463 | 'fragmentation-needed' => 1, | |
464 | 'source-route-failed' => 1, | |
465 | 'network-unknown' => 1, | |
466 | 'host-unknown' => 1, | |
467 | 'network-prohibited' => 1, | |
468 | 'host-prohibited' => 1, | |
469 | 'TOS-network-unreachable' => 1, | |
470 | 'TOS-host-unreachable' => 1, | |
471 | 'communication-prohibited' => 1, | |
472 | 'host-precedence-violation' => 1, | |
473 | 'precedence-cutoff' => 1, | |
474 | 'source-quench' => 1, | |
475 | 'redirect' => 1, | |
476 | 'network-redirect' => 1, | |
477 | 'host-redirect' => 1, | |
478 | 'TOS-network-redirect' => 1, | |
479 | 'TOS-host-redirect' => 1, | |
480 | 'echo-request' => 1, | |
481 | 'router-advertisement' => 1, | |
482 | 'router-solicitation' => 1, | |
483 | 'time-exceeded' => 1, | |
484 | 'ttl-zero-during-transit' => 1, | |
485 | 'ttl-zero-during-reassembly' => 1, | |
486 | 'parameter-problem' => 1, | |
487 | 'ip-header-bad' => 1, | |
488 | 'required-option-missing' => 1, | |
489 | 'timestamp-request' => 1, | |
490 | 'timestamp-reply' => 1, | |
491 | 'address-mask-request' => 1, | |
492 | 'address-mask-reply' => 1, | |
493 | }; | |
494 | ||
a332200b | 495 | sub get_firewall_macros { |
9aab3127 | 496 | |
961b4928 | 497 | return $pve_fw_parsed_macros if $pve_fw_parsed_macros; |
6158271d | 498 | |
961b4928 | 499 | $pve_fw_parsed_macros = {}; |
9aab3127 | 500 | |
961b4928 DM |
501 | foreach my $k (keys %$pve_fw_macros) { |
502 | my $name = lc($k); | |
a332200b | 503 | |
961b4928 DM |
504 | my $macro = $pve_fw_macros->{$k}; |
505 | $pve_fw_preferred_macro_names->{$name} = $k; | |
506 | $pve_fw_parsed_macros->{$name} = $macro; | |
507 | } | |
a332200b | 508 | |
961b4928 | 509 | return $pve_fw_parsed_macros; |
9aab3127 DM |
510 | } |
511 | ||
fcba0beb DM |
512 | my $etc_services; |
513 | ||
514 | sub get_etc_services { | |
515 | ||
516 | return $etc_services if $etc_services; | |
517 | ||
518 | my $filename = "/etc/services"; | |
519 | ||
520 | my $fh = IO::File->new($filename, O_RDONLY); | |
521 | if (!$fh) { | |
522 | warn "unable to read '$filename' - $!\n"; | |
523 | return {}; | |
524 | } | |
525 | ||
526 | my $services = {}; | |
527 | ||
528 | while (my $line = <$fh>) { | |
529 | chomp ($line); | |
530 | next if $line =~m/^#/; | |
531 | next if ($line =~m/^\s*$/); | |
532 | ||
533 | if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) { | |
534 | $services->{byid}->{$2}->{name} = $1; | |
35b66e9d | 535 | $services->{byid}->{$2}->{port} = $2; |
fcba0beb DM |
536 | $services->{byid}->{$2}->{$3} = 1; |
537 | $services->{byname}->{$1} = $services->{byid}->{$2}; | |
538 | } | |
539 | } | |
540 | ||
541 | close($fh); | |
542 | ||
6158271d DM |
543 | $etc_services = $services; |
544 | ||
3a616aa0 | 545 | |
fcba0beb DM |
546 | return $etc_services; |
547 | } | |
548 | ||
549 | my $etc_protocols; | |
550 | ||
551 | sub get_etc_protocols { | |
552 | return $etc_protocols if $etc_protocols; | |
553 | ||
554 | my $filename = "/etc/protocols"; | |
555 | ||
556 | my $fh = IO::File->new($filename, O_RDONLY); | |
557 | if (!$fh) { | |
558 | warn "unable to read '$filename' - $!\n"; | |
559 | return {}; | |
560 | } | |
561 | ||
562 | my $protocols = {}; | |
563 | ||
564 | while (my $line = <$fh>) { | |
565 | chomp ($line); | |
566 | next if $line =~m/^#/; | |
567 | next if ($line =~m/^\s*$/); | |
568 | ||
569 | if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) { | |
570 | $protocols->{byid}->{$2}->{name} = $1; | |
571 | $protocols->{byname}->{$1} = $protocols->{byid}->{$2}; | |
572 | } | |
573 | } | |
574 | ||
575 | close($fh); | |
576 | ||
577 | $etc_protocols = $protocols; | |
578 | ||
579 | return $etc_protocols; | |
580 | } | |
581 | ||
ecbea048 DM |
582 | sub parse_address_list { |
583 | my ($str) = @_; | |
584 | ||
d6de1dc2 | 585 | my $nbaor = 0; |
ecbea048 DM |
586 | foreach my $aor (split(/,/, $str)) { |
587 | if (!Net::IP->new($aor)) { | |
588 | my $err = Net::IP::Error(); | |
589 | die "invalid IP address: $err\n"; | |
d6de1dc2 AD |
590 | }else{ |
591 | $nbaor++; | |
ecbea048 DM |
592 | } |
593 | } | |
d6de1dc2 | 594 | return $nbaor; |
ecbea048 | 595 | } |
dddd9413 | 596 | |
fcba0beb DM |
597 | sub parse_port_name_number_or_range { |
598 | my ($str) = @_; | |
599 | ||
600 | my $services = PVE::Firewall::get_etc_services(); | |
4cdbb3b7 | 601 | my $nbports = 0; |
fcba0beb | 602 | foreach my $item (split(/,/, $str)) { |
4cdbb3b7 | 603 | my $portlist = ""; |
35b66e9d | 604 | my $oldpon = undef; |
4b586518 | 605 | $nbports++; |
fcba0beb | 606 | foreach my $pon (split(':', $item, 2)) { |
35b66e9d | 607 | $pon = $services->{byname}->{$pon}->{port} if $services->{byname}->{$pon}->{port}; |
4cdbb3b7 | 608 | if ($pon =~ m/^\d+$/){ |
857f62c8 | 609 | die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535; |
35b66e9d AD |
610 | die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon); |
611 | $oldpon = $pon; | |
4cdbb3b7 AD |
612 | }else{ |
613 | die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon}; | |
614 | } | |
fcba0beb DM |
615 | } |
616 | } | |
617 | ||
4cdbb3b7 | 618 | return ($nbports); |
fcba0beb DM |
619 | } |
620 | ||
780bcc0f DM |
621 | my $bridge_firewall_enabled = 0; |
622 | ||
623 | sub enable_bridge_firewall { | |
624 | ||
625 | return if $bridge_firewall_enabled; # only once | |
626 | ||
5f0a912c DM |
627 | PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1"); |
628 | PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1"); | |
780bcc0f | 629 | |
6a8a75db DM |
630 | # make sure syncookies are enabled (which is default on newer 3.X kernels anyways) |
631 | PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1"); | |
632 | ||
780bcc0f DM |
633 | $bridge_firewall_enabled = 1; |
634 | } | |
635 | ||
8cebfa6f | 636 | my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n"; |
dddd9413 | 637 | |
3a616aa0 AD |
638 | sub iptables { |
639 | my ($cmd) = @_; | |
640 | ||
641 | run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {}); | |
642 | } | |
643 | ||
b16e818e DM |
644 | sub iptables_restore_cmdlist { |
645 | my ($cmdlist) = @_; | |
3a616aa0 | 646 | |
3fa83edf | 647 | run_command("/sbin/iptables-restore -n", input => $cmdlist); |
3a616aa0 AD |
648 | } |
649 | ||
de2a57cd DM |
650 | sub iptables_get_chains { |
651 | ||
652 | my $res = {}; | |
653 | ||
654 | # check what chains we want to track | |
655 | my $is_pvefw_chain = sub { | |
656 | my $name = shift; | |
657 | ||
dec84fcd DM |
658 | return 1 if $name =~ m/^PVEFW-\S+$/; |
659 | ||
de2a57cd | 660 | return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/; |
5927497d | 661 | return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT)$/; |
f50656c2 | 662 | return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/; |
de2a57cd DM |
663 | |
664 | return undef; | |
665 | }; | |
666 | ||
667 | my $table = ''; | |
668 | ||
de2a57cd DM |
669 | my $parser = sub { |
670 | my $line = shift; | |
671 | ||
672 | return if $line =~ m/^#/; | |
673 | return if $line =~ m/^\s*$/; | |
674 | ||
675 | if ($line =~ m/^\*(\S+)$/) { | |
676 | $table = $1; | |
677 | return; | |
678 | } | |
679 | ||
680 | return if $table ne 'filter'; | |
681 | ||
682 | if ($line =~ m/^:(\S+)\s/) { | |
683 | my $chain = $1; | |
684 | return if !&$is_pvefw_chain($chain); | |
3fa83edf | 685 | $res->{$chain} = "unknown"; |
09d5f68e | 686 | } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) { |
3fa83edf | 687 | my ($chain, $sig) = ($1, $2); |
de2a57cd | 688 | return if !&$is_pvefw_chain($chain); |
3fa83edf | 689 | $res->{$chain} = $sig; |
de2a57cd DM |
690 | } else { |
691 | # simply ignore the rest | |
692 | return; | |
693 | } | |
694 | }; | |
695 | ||
696 | run_command("/sbin/iptables-save", outfunc => $parser); | |
697 | ||
de2a57cd DM |
698 | return $res; |
699 | } | |
700 | ||
3a616aa0 AD |
701 | sub iptables_chain_exist { |
702 | my ($chain) = @_; | |
703 | ||
704 | eval{ | |
705 | iptables("-n --list $chain"); | |
706 | }; | |
707 | return undef if $@; | |
708 | ||
709 | return 1; | |
710 | } | |
711 | ||
712 | sub iptables_rule_exist { | |
713 | my ($rule) = @_; | |
714 | ||
715 | eval{ | |
716 | iptables("-C $rule"); | |
717 | }; | |
718 | return undef if $@; | |
719 | ||
720 | return 1; | |
721 | } | |
722 | ||
3fa83edf | 723 | sub ruleset_generate_rule { |
2f906466 | 724 | my ($ruleset, $chain, $rule, $actions, $goto) = @_; |
3a616aa0 | 725 | |
11bac5c2 DM |
726 | return if $rule->{disable}; |
727 | ||
41524a58 | 728 | my @cmd = (); |
3a616aa0 | 729 | |
41524a58 DM |
730 | push @cmd, "-m iprange --src-range" if $rule->{nbsource} && $rule->{nbsource} > 1; |
731 | push @cmd, "-s $rule->{source}" if $rule->{source}; | |
732 | push @cmd, "-m iprange --dst-range" if $rule->{nbdest} && $rule->{nbdest} > 1; | |
733 | push @cmd, "-d $rule->{dest}" if $rule->{dest}; | |
4b586518 | 734 | |
181390b0 | 735 | if ($rule->{proto}) { |
41524a58 | 736 | push @cmd, "-p $rule->{proto}"; |
e3a1d391 | 737 | |
181390b0 DM |
738 | my $multiport = 0; |
739 | $multiport++ if $rule->{nbdport} && ($rule->{nbdport} > 1); | |
740 | $multiport++ if $rule->{nbsport} && ($rule->{nbsport} > 1); | |
e3a1d391 | 741 | |
41524a58 | 742 | push @cmd, "--match multiport" if $multiport; |
4b586518 | 743 | |
181390b0 DM |
744 | die "multiport: option '--sports' cannot be used together with '--dports'\n" |
745 | if ($multiport == 2) && ($rule->{dport} ne $rule->{sport}); | |
746 | ||
747 | if ($rule->{dport}) { | |
748 | if ($rule->{proto} && $rule->{proto} eq 'icmp') { | |
749 | # Note: we use dport to store --icmp-type | |
750 | die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}}); | |
41524a58 | 751 | push @cmd, "-m icmp --icmp-type $rule->{dport}"; |
181390b0 DM |
752 | } else { |
753 | if ($rule->{nbdport} && $rule->{nbdport} > 1) { | |
754 | if ($multiport == 2) { | |
41524a58 | 755 | push @cmd, "--ports $rule->{dport}"; |
181390b0 | 756 | } else { |
41524a58 | 757 | push @cmd, "--dports $rule->{dport}"; |
181390b0 | 758 | } |
e3a1d391 | 759 | } else { |
41524a58 | 760 | push @cmd, "--dport $rule->{dport}"; |
e3a1d391 | 761 | } |
4b586518 DM |
762 | } |
763 | } | |
4b586518 | 764 | |
181390b0 DM |
765 | if ($rule->{sport}) { |
766 | if ($rule->{nbsport} && $rule->{nbsport} > 1) { | |
41524a58 | 767 | push @cmd, "--sports $rule->{sport}" if $multiport != 2; |
181390b0 | 768 | } else { |
41524a58 | 769 | push @cmd, "--sport $rule->{sport}"; |
181390b0 | 770 | } |
4b586518 | 771 | } |
181390b0 DM |
772 | } elsif ($rule->{dport} || $rule->{sport}) { |
773 | warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport}; | |
774 | warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport}; | |
4b586518 DM |
775 | } |
776 | ||
41524a58 | 777 | push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype}; |
4e6112f9 DM |
778 | |
779 | if (my $action = $rule->{action}) { | |
2f906466 | 780 | $action = $actions->{$action} if defined($actions->{$action}); |
4e6112f9 | 781 | $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK'; |
41524a58 | 782 | push @cmd, $goto ? "-g $action" : "-j $action"; |
181390b0 | 783 | } |
3a616aa0 | 784 | |
41524a58 DM |
785 | if (scalar(@cmd)) { |
786 | my $cmdstr = join(' ', @cmd); | |
787 | ruleset_addrule($ruleset, $chain, $cmdstr); | |
788 | } | |
3fa83edf DM |
789 | } |
790 | ||
791 | sub ruleset_create_chain { | |
792 | my ($ruleset, $chain) = @_; | |
3a616aa0 | 793 | |
d050c724 DM |
794 | die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28; |
795 | ||
3fa83edf DM |
796 | die "chain '$chain' already exists\n" if $ruleset->{$chain}; |
797 | ||
798 | $ruleset->{$chain} = []; | |
3a616aa0 AD |
799 | } |
800 | ||
3fa83edf DM |
801 | sub ruleset_chain_exist { |
802 | my ($ruleset, $chain) = @_; | |
3a616aa0 | 803 | |
3fa83edf DM |
804 | return $ruleset->{$chain} ? 1 : undef; |
805 | } | |
3a616aa0 | 806 | |
3fa83edf DM |
807 | sub ruleset_addrule { |
808 | my ($ruleset, $chain, $rule) = @_; | |
3a616aa0 | 809 | |
3fa83edf | 810 | die "no such chain '$chain'\n" if !$ruleset->{$chain}; |
3a616aa0 | 811 | |
3fa83edf DM |
812 | push @{$ruleset->{$chain}}, "-A $chain $rule"; |
813 | } | |
3a616aa0 | 814 | |
3fa83edf DM |
815 | sub ruleset_insertrule { |
816 | my ($ruleset, $chain, $rule) = @_; | |
3a616aa0 | 817 | |
3fa83edf | 818 | die "no such chain '$chain'\n" if !$ruleset->{$chain}; |
3a616aa0 | 819 | |
3fa83edf DM |
820 | unshift @{$ruleset->{$chain}}, "-A $chain $rule"; |
821 | } | |
3a616aa0 | 822 | |
3fa83edf | 823 | sub generate_bridge_chains { |
2f3d8d76 DM |
824 | my ($ruleset, $hostfw_conf, $bridge) = @_; |
825 | ||
826 | my $options = $hostfw_conf->{options}; | |
827 | ||
828 | # fixme: what log level should we use here? | |
829 | my $loglevel = get_option_log_level($options, "log_level_out"); | |
3a616aa0 | 830 | |
5927497d DM |
831 | if (!ruleset_chain_exist($ruleset, "$bridge-FW")) { |
832 | ruleset_create_chain($ruleset, "$bridge-FW"); | |
833 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-bridged -j $bridge-FW"); | |
834 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-bridged -j $bridge-FW"); | |
2f3d8d76 DM |
835 | # disable interbridge routing |
836 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j PVEFW-Drop"); | |
837 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j PVEFW-Drop"); | |
838 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j LOG --log-prefix \"PVEFW-FORWARD-dropped \" --log-level $loglevel"); | |
839 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j LOG --log-prefix \"PVEFW-FORWARD-dropped \" --log-level $loglevel"); | |
840 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j DROP"); | |
841 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j DROP"); | |
3fa83edf | 842 | } |
3a616aa0 | 843 | |
3fa83edf DM |
844 | if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) { |
845 | ruleset_create_chain($ruleset, "$bridge-OUT"); | |
5927497d | 846 | ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-in -j $bridge-OUT"); |
12cc9946 | 847 | ruleset_addrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-bridged --physdev-is-in -j $bridge-OUT"); |
9fcad984 AD |
848 | } |
849 | ||
850 | if (!ruleset_chain_exist($ruleset, "$bridge-IN")) { | |
851 | ruleset_create_chain($ruleset, "$bridge-IN"); | |
5927497d | 852 | ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j $bridge-IN"); |
fdb0bf20 | 853 | ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT"); |
7323008d DM |
854 | # accept traffic to unmanaged bridge ports |
855 | ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j ACCEPT "); | |
3fa83edf DM |
856 | } |
857 | } | |
3a616aa0 | 858 | |
ead850e8 DM |
859 | sub ruleset_add_chain_policy { |
860 | my ($ruleset, $chain, $policy, $loglevel, $accept_action) = @_; | |
861 | ||
862 | if ($policy eq 'ACCEPT') { | |
863 | ||
864 | ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' }, | |
865 | { ACCEPT => $accept_action}); | |
866 | ||
867 | } elsif ($policy eq 'DROP') { | |
868 | ||
869 | ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop"); | |
870 | ||
871 | ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"$chain-dropped: \" --log-level $loglevel") | |
872 | if defined($loglevel); | |
873 | ||
874 | ruleset_addrule($ruleset, $chain, "-j DROP"); | |
875 | } elsif ($policy eq 'REJECT') { | |
876 | ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject"); | |
877 | ||
878 | ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"$chain-reject: \" --log-level $loglevel") | |
879 | if defined($loglevel); | |
880 | ||
881 | ruleset_addrule($ruleset, $chain, "-g PVEFW-reject"); | |
882 | } else { | |
883 | # should not happen | |
884 | die "internal error: unknown policy '$policy'"; | |
885 | } | |
886 | } | |
887 | ||
3a616aa0 | 888 | sub generate_tap_rules_direction { |
92e976b3 | 889 | my ($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, $direction) = @_; |
fa9c4a6f | 890 | |
178a63be | 891 | my $lc_direction = lc($direction); |
92e976b3 DM |
892 | |
893 | my $rules = $vmfw_conf->{rules}; | |
178a63be | 894 | |
fa9c4a6f | 895 | my $options = $vmfw_conf->{options}; |
178a63be | 896 | my $loglevel = get_option_log_level($options, "log_level_${lc_direction}"); |
3a616aa0 AD |
897 | |
898 | my $tapchain = "$iface-$direction"; | |
899 | ||
3fa83edf | 900 | ruleset_create_chain($ruleset, $tapchain); |
3a616aa0 | 901 | |
bee633ab DM |
902 | if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) { |
903 | ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs"); | |
904 | } | |
905 | ||
ce15d90b DM |
906 | if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) { |
907 | ruleset_addrule($ruleset, $tapchain, "-p udp -m udp --dport 67:68 -j ACCEPT"); | |
908 | } | |
909 | ||
bee633ab DM |
910 | if ($options->{tcpflags}) { |
911 | ruleset_addrule($ruleset, $tapchain, "-p tcp -j PVEFW-tcpflags"); | |
912 | } | |
913 | ||
7fab95bc DM |
914 | ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate INVALID -j DROP"); |
915 | ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT"); | |
3a616aa0 | 916 | |
b21aca2c DM |
917 | if ($direction eq 'OUT') { |
918 | if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) { | |
919 | ruleset_addrule($ruleset, $tapchain, "-m mac ! --mac-source $macaddr -j DROP"); | |
920 | } | |
921 | ruleset_addrule($ruleset, $tapchain, "-j MARK --set-mark 0"); # clear mark | |
c29f55c9 DM |
922 | } |
923 | ||
92e976b3 DM |
924 | foreach my $rule (@$rules) { |
925 | next if $rule->{iface} && $rule->{iface} ne $netid; | |
926 | next if $rule->{disable}; | |
927 | if ($rule->{type} eq 'group') { | |
928 | my $group_chain = "GROUP-$rule->{action}-$direction"; | |
929 | if(!ruleset_chain_exist($ruleset, $group_chain)){ | |
930 | generate_group_rules($ruleset, $groups_conf, $rule->{action}); | |
931 | } | |
932 | ruleset_addrule($ruleset, $tapchain, "-j $group_chain"); | |
933 | ruleset_addrule($ruleset, $tapchain, "-m mark --mark 1 -j RETURN") | |
934 | if $direction eq 'OUT'; | |
935 | } else { | |
936 | next if $rule->{type} ne $lc_direction; | |
937 | if ($direction eq 'OUT') { | |
938 | ruleset_generate_rule($ruleset, $tapchain, $rule, | |
939 | { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }); | |
4e6112f9 | 940 | } else { |
92e976b3 | 941 | ruleset_generate_rule($ruleset, $tapchain, $rule, { REJECT => "PVEFW-reject" }); |
3a616aa0 | 942 | } |
4e6112f9 | 943 | } |
3a616aa0 AD |
944 | } |
945 | ||
ccae0b50 DM |
946 | # implement policy |
947 | my $policy; | |
948 | ||
949 | if ($direction eq 'OUT') { | |
950 | $policy = $options->{'policy-out'} || 'ACCEPT'; # allow everything by default | |
951 | } else { | |
d6796543 | 952 | $policy = $options->{'policy-in'} || 'DROP'; # allow nothing by default |
ccae0b50 DM |
953 | } |
954 | ||
ead850e8 DM |
955 | my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : "ACCEPT"; |
956 | ruleset_add_chain_policy($ruleset, $tapchain, $policy, $loglevel, $accept_action); | |
3a616aa0 | 957 | |
3fa83edf DM |
958 | # plug the tap chain to bridge chain |
959 | my $physdevdirection = $direction eq 'IN' ? "out" : "in"; | |
960 | my $rule = "-m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain"; | |
961 | ruleset_insertrule($ruleset, "$bridge-$direction", $rule); | |
3a616aa0 AD |
962 | } |
963 | ||
d18c1e2b | 964 | sub enable_host_firewall { |
92e976b3 | 965 | my ($ruleset, $hostfw_conf, $groups_conf) = @_; |
0bd5f137 | 966 | |
51bae274 | 967 | # fixme: allow security groups |
0bd5f137 | 968 | |
92e976b3 DM |
969 | my $options = $hostfw_conf->{options}; |
970 | my $rules = $hostfw_conf->{rules}; | |
178a63be | 971 | |
3fa83edf | 972 | # host inbound firewall |
dec84fcd DM |
973 | my $chain = "PVEFW-HOST-IN"; |
974 | ruleset_create_chain($ruleset, $chain); | |
0bd5f137 | 975 | |
178a63be DM |
976 | my $loglevel = get_option_log_level($options, "log_level_in"); |
977 | ||
7fab95bc DM |
978 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP"); |
979 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT"); | |
dec84fcd DM |
980 | ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT"); |
981 | ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT"); | |
7fab95bc | 982 | ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT"); |
dec84fcd | 983 | ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync |
0bd5f137 | 984 | |
23e888f8 DM |
985 | # we use RETURN because we need to check also tap rules |
986 | my $accept_action = 'RETURN'; | |
987 | ||
92e976b3 DM |
988 | foreach my $rule (@$rules) { |
989 | next if $rule->{type} ne 'in'; | |
23e888f8 | 990 | ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }); |
0bd5f137 AD |
991 | } |
992 | ||
23e888f8 DM |
993 | # implement input policy |
994 | my $policy = $options->{'policy-in'} || 'DROP'; # allow nothing by default | |
995 | ruleset_add_chain_policy($ruleset, $chain, $policy, $loglevel, $accept_action); | |
0bd5f137 | 996 | |
3fa83edf | 997 | # host outbound firewall |
aadd745e | 998 | $chain = "PVEFW-HOST-OUT"; |
dec84fcd DM |
999 | ruleset_create_chain($ruleset, $chain); |
1000 | ||
178a63be DM |
1001 | $loglevel = get_option_log_level($options, "log_level_out"); |
1002 | ||
7fab95bc DM |
1003 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP"); |
1004 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT"); | |
dec84fcd DM |
1005 | ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT"); |
1006 | ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT"); | |
7fab95bc | 1007 | ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT"); |
dec84fcd | 1008 | ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync |
0bd5f137 | 1009 | |
23e888f8 DM |
1010 | # we use RETURN because we may want to check other thigs later |
1011 | $accept_action = 'RETURN'; | |
1012 | ||
92e976b3 DM |
1013 | foreach my $rule (@$rules) { |
1014 | next if $rule->{type} ne 'out'; | |
23e888f8 | 1015 | ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }); |
0bd5f137 AD |
1016 | } |
1017 | ||
23e888f8 DM |
1018 | # implement output policy |
1019 | $policy = $options->{'policy-out'} || 'ACCEPT'; # allow everything by default | |
1020 | ruleset_add_chain_policy($ruleset, $chain, $policy, $loglevel, $accept_action); | |
6158271d | 1021 | |
dec84fcd DM |
1022 | ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT"); |
1023 | ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN"); | |
9d31b418 AD |
1024 | } |
1025 | ||
1026 | sub generate_group_rules { | |
92e976b3 | 1027 | my ($ruleset, $groups_conf, $group) = @_; |
9d31b418 | 1028 | |
92e976b3 | 1029 | die "no such security group '$group'\n" if !$groups_conf->{$group}; |
9d31b418 | 1030 | |
92e976b3 | 1031 | my $rules = $groups_conf->{$group}->{rules}; |
6158271d | 1032 | |
3fa83edf | 1033 | my $chain = "GROUP-${group}-IN"; |
9d31b418 | 1034 | |
3fa83edf | 1035 | ruleset_create_chain($ruleset, $chain); |
9d31b418 | 1036 | |
92e976b3 DM |
1037 | foreach my $rule (@$rules) { |
1038 | next if $rule->{type} ne 'in'; | |
1039 | ruleset_generate_rule($ruleset, $chain, $rule, { REJECT => "PVEFW-reject" }); | |
9d31b418 AD |
1040 | } |
1041 | ||
3fa83edf | 1042 | $chain = "GROUP-${group}-OUT"; |
9d31b418 | 1043 | |
3fa83edf | 1044 | ruleset_create_chain($ruleset, $chain); |
4e6112f9 | 1045 | ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark |
9d31b418 | 1046 | |
92e976b3 DM |
1047 | foreach my $rule (@$rules) { |
1048 | next if $rule->{type} ne 'out'; | |
1049 | # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to | |
1050 | # check also other tap rules later | |
1051 | ruleset_generate_rule($ruleset, $chain, $rule, | |
1052 | { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }); | |
9d31b418 | 1053 | } |
9d31b418 AD |
1054 | } |
1055 | ||
51bae274 DM |
1056 | my $MAX_NETS = 32; |
1057 | my $valid_netdev_names = {}; | |
1058 | for (my $i = 0; $i < $MAX_NETS; $i++) { | |
1059 | $valid_netdev_names->{"net$i"} = 1; | |
1060 | } | |
5e1267a5 | 1061 | |
51bae274 DM |
1062 | sub parse_fw_rule { |
1063 | my ($line, $need_iface, $allow_groups) = @_; | |
5e1267a5 | 1064 | |
a332200b | 1065 | my $macros = get_firewall_macros(); |
fcba0beb | 1066 | my $protocols = get_etc_protocols(); |
51bae274 | 1067 | |
92e976b3 | 1068 | my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport); |
51bae274 | 1069 | |
11bac5c2 DM |
1070 | # we can add single line comments to the end of the rule |
1071 | my $comment = $1 if $line =~ s/#\s*(.*?)\s*$//; | |
1072 | ||
1073 | # we can disable a rule when prefixed with '|' | |
1074 | my $disable = 1 if $line =~ s/^\|//; | |
51bae274 DM |
1075 | |
1076 | my @data = split(/\s+/, $line); | |
92e976b3 | 1077 | my $expected_elements = $need_iface ? 8 : 7; |
51bae274 DM |
1078 | |
1079 | die "wrong number of rule elements\n" if scalar(@data) > $expected_elements; | |
1080 | ||
1081 | if ($need_iface) { | |
92e976b3 | 1082 | ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data |
51bae274 | 1083 | } else { |
92e976b3 | 1084 | ($type, $action, $source, $dest, $proto, $dport, $sport) = @data; |
51bae274 DM |
1085 | } |
1086 | ||
92e976b3 | 1087 | die "incomplete rule\n" if ! ($type && $action); |
51bae274 | 1088 | |
961b4928 DM |
1089 | my $macro; |
1090 | my $macro_name; | |
1091 | ||
92e976b3 DM |
1092 | $type = lc($type); |
1093 | ||
1094 | if ($type eq 'in' || $type eq 'out') { | |
1095 | if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) { | |
1096 | # OK | |
1097 | } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) { | |
1098 | ($macro_name, $action) = ($1, $2); | |
1099 | my $lc_macro_name = lc($macro_name); | |
1100 | my $preferred_name = $pve_fw_preferred_macro_names->{$lc_macro_name}; | |
1101 | $macro_name = $preferred_name if $preferred_name; | |
1102 | $macro = $macros->{$lc_macro_name}; | |
1103 | die "unknown macro '$macro_name'\n" if !$macro; | |
1104 | } else { | |
1105 | die "unknown action '$action'\n"; | |
1106 | } | |
1107 | } elsif ($type eq 'group') { | |
1108 | die "wrong number of rule elements\n" if scalar(@data) != 3; | |
1109 | die "groups disabled\n" if !$allow_groups; | |
1110 | ||
1111 | die "invalid characters in group name\n" if $action !~ m/^[A-Za-z0-9_\-]+$/; | |
51bae274 | 1112 | } else { |
92e976b3 | 1113 | die "unknown rule type '$type'\n"; |
51bae274 DM |
1114 | } |
1115 | ||
1116 | if ($need_iface) { | |
1117 | $iface = undef if $iface && $iface eq '-'; | |
6158271d | 1118 | die "unknown interface '$iface'\n" |
51bae274 DM |
1119 | if defined($iface) && !$valid_netdev_names->{$iface}; |
1120 | } | |
1121 | ||
1122 | $proto = undef if $proto && $proto eq '-'; | |
6158271d | 1123 | die "unknown protokol '$proto'\n" if $proto && |
51bae274 DM |
1124 | !(defined($protocols->{byname}->{$proto}) || |
1125 | defined($protocols->{byid}->{$proto})); | |
1126 | ||
1127 | $source = undef if $source && $source eq '-'; | |
1128 | $dest = undef if $dest && $dest eq '-'; | |
1129 | ||
1130 | $dport = undef if $dport && $dport eq '-'; | |
1131 | $sport = undef if $sport && $sport eq '-'; | |
1132 | ||
51bae274 DM |
1133 | my $nbsource = undef; |
1134 | my $nbdest = undef; | |
1135 | ||
1136 | $nbsource = parse_address_list($source) if $source; | |
1137 | $nbdest = parse_address_list($dest) if $dest; | |
6158271d | 1138 | |
961b4928 | 1139 | my $rules = []; |
51bae274 | 1140 | |
961b4928 | 1141 | my $param = { |
92e976b3 | 1142 | type => $type, |
11bac5c2 DM |
1143 | disable => $disable, |
1144 | comment => $comment, | |
51bae274 | 1145 | action => $action, |
51bae274 DM |
1146 | iface => $iface, |
1147 | source => $source, | |
1148 | dest => $dest, | |
1149 | nbsource => $nbsource, | |
1150 | nbdest => $nbdest, | |
1151 | proto => $proto, | |
1152 | dport => $dport, | |
1153 | sport => $sport, | |
51bae274 | 1154 | }; |
961b4928 DM |
1155 | |
1156 | if ($macro) { | |
1157 | foreach my $templ (@$macro) { | |
1158 | my $rule = {}; | |
faf7be7e | 1159 | my $param_used = {}; |
961b4928 DM |
1160 | foreach my $k (keys %$templ) { |
1161 | my $v = $templ->{$k}; | |
857f62c8 DM |
1162 | if ($v eq 'PARAM') { |
1163 | $v = $param->{$k}; | |
faf7be7e | 1164 | $param_used->{$k} = 1; |
857f62c8 DM |
1165 | } elsif ($v eq 'DEST') { |
1166 | $v = $param->{dest}; | |
faf7be7e | 1167 | $param_used->{dest} = 1; |
857f62c8 DM |
1168 | } elsif ($v eq 'SOURCE') { |
1169 | $v = $param->{source}; | |
faf7be7e | 1170 | $param_used->{source} = 1; |
857f62c8 DM |
1171 | } |
1172 | ||
961b4928 DM |
1173 | die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v); |
1174 | $rule->{$k} = $v; | |
1175 | } | |
faf7be7e DM |
1176 | foreach my $k (keys %$param) { |
1177 | next if !defined($param->{$k}); | |
1178 | next if $param_used->{$k}; | |
1179 | if (defined($rule->{$k})) { | |
1180 | die "parameter '$k' already define in macro (value = '$rule->{$k}')\n" | |
1181 | if $rule->{$k} ne $param->{$k}; | |
1182 | } else { | |
1183 | $rule->{$k} = $param->{$k}; | |
1184 | } | |
1185 | } | |
961b4928 DM |
1186 | push @$rules, $rule; |
1187 | } | |
1188 | } else { | |
1189 | push @$rules, $param; | |
1190 | } | |
1191 | ||
1192 | foreach my $rule (@$rules) { | |
6158271d | 1193 | $rule->{nbdport} = parse_port_name_number_or_range($rule->{dport}) |
961b4928 | 1194 | if defined($rule->{dport}); |
6158271d | 1195 | $rule->{nbsport} = parse_port_name_number_or_range($rule->{sport}) |
961b4928 DM |
1196 | if defined($rule->{sport}); |
1197 | } | |
1198 | ||
1199 | return $rules; | |
51bae274 DM |
1200 | } |
1201 | ||
2d404ffc | 1202 | sub parse_vmfw_option { |
85c6eaed DM |
1203 | my ($line) = @_; |
1204 | ||
1205 | my ($opt, $value); | |
1206 | ||
178a63be DM |
1207 | my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog"; |
1208 | ||
ce15d90b | 1209 | if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags):\s*(0|1)\s*$/i) { |
9c6b6efd DM |
1210 | $opt = lc($1); |
1211 | $value = int($2); | |
178a63be DM |
1212 | } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) { |
1213 | $opt = lc($1); | |
1214 | $value = $2 ? lc($3) : ''; | |
85c6eaed DM |
1215 | } elsif ($line =~ m/^(policy-(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) { |
1216 | $opt = lc($1); | |
1217 | $value = uc($3); | |
9c6b6efd | 1218 | } else { |
85c6eaed DM |
1219 | chomp $line; |
1220 | die "can't parse option '$line'\n" | |
1221 | } | |
1222 | ||
1223 | return ($opt, $value); | |
1224 | } | |
1225 | ||
2d404ffc DM |
1226 | sub parse_hostfw_option { |
1227 | my ($line) = @_; | |
1228 | ||
1229 | my ($opt, $value); | |
1230 | ||
1231 | my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog"; | |
1232 | ||
1233 | if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags):\s*(0|1)\s*$/i) { | |
1234 | $opt = lc($1); | |
1235 | $value = int($2); | |
178a63be | 1236 | } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) { |
2d404ffc DM |
1237 | $opt = lc($1); |
1238 | $value = $2 ? lc($3) : ''; | |
1239 | } elsif ($line =~ m/^(policy-(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) { | |
1240 | $opt = lc($1); | |
1241 | $value = uc($3); | |
1242 | } else { | |
1243 | chomp $line; | |
1244 | die "can't parse option '$line'\n" | |
1245 | } | |
1246 | ||
1247 | return ($opt, $value); | |
1248 | } | |
1249 | ||
51bae274 DM |
1250 | sub parse_vm_fw_rules { |
1251 | my ($filename, $fh) = @_; | |
1252 | ||
92e976b3 | 1253 | my $res = { rules => [], options => {}}; |
51bae274 DM |
1254 | |
1255 | my $section; | |
1256 | ||
5e1267a5 DM |
1257 | while (defined(my $line = <$fh>)) { |
1258 | next if $line =~ m/^#/; | |
1259 | next if $line =~ m/^\s*$/; | |
1260 | ||
961b4928 DM |
1261 | my $linenr = $fh->input_line_number(); |
1262 | my $prefix = "$filename (line $linenr)"; | |
1263 | ||
85c6eaed | 1264 | if ($line =~ m/^\[(\S+)\]\s*$/i) { |
5e1267a5 | 1265 | $section = lc($1); |
85c6eaed | 1266 | warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section}; |
5e1267a5 DM |
1267 | next; |
1268 | } | |
51bae274 | 1269 | if (!$section) { |
961b4928 | 1270 | warn "$prefix: skip line - no section"; |
5e1267a5 DM |
1271 | next; |
1272 | } | |
1273 | ||
85c6eaed DM |
1274 | next if !$res->{$section}; # skip undefined section |
1275 | ||
1276 | if ($section eq 'options') { | |
6158271d | 1277 | eval { |
2d404ffc | 1278 | my ($opt, $value) = parse_vmfw_option($line); |
85c6eaed DM |
1279 | $res->{options}->{$opt} = $value; |
1280 | }; | |
1281 | warn "$prefix: $@" if $@; | |
1282 | next; | |
1283 | } | |
1284 | ||
961b4928 DM |
1285 | my $rules; |
1286 | eval { $rules = parse_fw_rule($line, 1, 1); }; | |
51bae274 | 1287 | if (my $err = $@) { |
961b4928 | 1288 | warn "$prefix: $err"; |
5e1267a5 DM |
1289 | next; |
1290 | } | |
1291 | ||
961b4928 | 1292 | push @{$res->{$section}}, @$rules; |
51bae274 DM |
1293 | } |
1294 | ||
1295 | return $res; | |
1296 | } | |
1297 | ||
1298 | sub parse_host_fw_rules { | |
1299 | my ($filename, $fh) = @_; | |
1300 | ||
92e976b3 | 1301 | my $res = { rules => [], options => {}}; |
51bae274 DM |
1302 | |
1303 | my $section; | |
1304 | ||
1305 | while (defined(my $line = <$fh>)) { | |
1306 | next if $line =~ m/^#/; | |
1307 | next if $line =~ m/^\s*$/; | |
1308 | ||
961b4928 DM |
1309 | my $linenr = $fh->input_line_number(); |
1310 | my $prefix = "$filename (line $linenr)"; | |
1311 | ||
2d404ffc | 1312 | if ($line =~ m/^\[(\S+)\]\s*$/i) { |
51bae274 | 1313 | $section = lc($1); |
2d404ffc | 1314 | warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section}; |
5e1267a5 DM |
1315 | next; |
1316 | } | |
51bae274 | 1317 | if (!$section) { |
961b4928 | 1318 | warn "$prefix: skip line - no section"; |
5e1267a5 DM |
1319 | next; |
1320 | } | |
1321 | ||
2d404ffc DM |
1322 | next if !$res->{$section}; # skip undefined section |
1323 | ||
1324 | if ($section eq 'options') { | |
1325 | eval { | |
2d404ffc DM |
1326 | my ($opt, $value) = parse_hostfw_option($line); |
1327 | $res->{options}->{$opt} = $value; | |
1328 | }; | |
1329 | warn "$prefix: $@" if $@; | |
1330 | next; | |
1331 | } | |
1332 | ||
961b4928 DM |
1333 | my $rules; |
1334 | eval { $rules = parse_fw_rule($line, 1, 1); }; | |
ecbea048 | 1335 | if (my $err = $@) { |
961b4928 | 1336 | warn "$prefix: $err"; |
ecbea048 | 1337 | next; |
ecbea048 DM |
1338 | } |
1339 | ||
961b4928 | 1340 | push @{$res->{$section}}, @$rules; |
51bae274 | 1341 | } |
ecbea048 | 1342 | |
51bae274 DM |
1343 | return $res; |
1344 | } | |
4cdbb3b7 | 1345 | |
51bae274 DM |
1346 | sub parse_group_fw_rules { |
1347 | my ($filename, $fh) = @_; | |
5e1267a5 | 1348 | |
51bae274 DM |
1349 | my $section; |
1350 | my $group; | |
1351 | ||
92e976b3 | 1352 | my $res = { rules => [] }; |
6158271d | 1353 | |
51bae274 DM |
1354 | while (defined(my $line = <$fh>)) { |
1355 | next if $line =~ m/^#/; | |
1356 | next if $line =~ m/^\s*$/; | |
1357 | ||
961b4928 DM |
1358 | my $linenr = $fh->input_line_number(); |
1359 | my $prefix = "$filename (line $linenr)"; | |
1360 | ||
92e976b3 DM |
1361 | if ($line =~ m/^\[group\s+(\S+)\]\s*$/i) { |
1362 | $section = 'rules'; | |
1363 | $group = lc($1); | |
51bae274 DM |
1364 | next; |
1365 | } | |
1366 | if (!$section || !$group) { | |
961b4928 | 1367 | warn "$prefix: skip line - no section"; |
51bae274 DM |
1368 | next; |
1369 | } | |
1370 | ||
961b4928 DM |
1371 | my $rules; |
1372 | eval { $rules = parse_fw_rule($line, 0, 0); }; | |
51bae274 | 1373 | if (my $err = $@) { |
961b4928 | 1374 | warn "$prefix: $err"; |
51bae274 DM |
1375 | next; |
1376 | } | |
1377 | ||
961b4928 | 1378 | push @{$res->{$group}->{$section}}, @$rules; |
5e1267a5 DM |
1379 | } |
1380 | ||
1381 | return $res; | |
1382 | } | |
1383 | ||
06320eb0 DM |
1384 | sub run_locked { |
1385 | my ($code, @param) = @_; | |
1386 | ||
1387 | my $timeout = 10; | |
1388 | ||
1389 | my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param); | |
1390 | ||
1391 | die $@ if $@; | |
1392 | ||
1393 | return $res; | |
1394 | } | |
1395 | ||
5e1267a5 DM |
1396 | sub read_local_vm_config { |
1397 | ||
1398 | my $openvz = {}; | |
1399 | ||
1400 | my $qemu = {}; | |
1401 | ||
1402 | my $list = PVE::QemuServer::config_list(); | |
1403 | ||
1404 | foreach my $vmid (keys %$list) { | |
5e1267a5 DM |
1405 | my $cfspath = PVE::QemuServer::cfs_config_path($vmid); |
1406 | if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) { | |
1407 | $qemu->{$vmid} = $conf; | |
1408 | } | |
1409 | } | |
1410 | ||
1411 | my $vmdata = { openvz => $openvz, qemu => $qemu }; | |
1412 | ||
1413 | return $vmdata; | |
1414 | }; | |
1415 | ||
6fc63ffd | 1416 | sub read_vm_firewall_configs { |
5e1267a5 | 1417 | my ($vmdata) = @_; |
6fc63ffd | 1418 | my $vmfw_configs = {}; |
5e1267a5 DM |
1419 | foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) { |
1420 | my $filename = "/etc/pve/firewall/$vmid.fw"; | |
1421 | my $fh = IO::File->new($filename, O_RDONLY); | |
1422 | next if !$fh; | |
1423 | ||
6fc63ffd | 1424 | $vmfw_configs->{$vmid} = parse_vm_fw_rules($filename, $fh); |
5e1267a5 DM |
1425 | } |
1426 | ||
6fc63ffd | 1427 | return $vmfw_configs; |
5e1267a5 DM |
1428 | } |
1429 | ||
2d404ffc DM |
1430 | sub get_option_log_level { |
1431 | my ($options, $k) = @_; | |
1432 | ||
1433 | my $v = $options->{$k}; | |
178a63be | 1434 | $v = $default_log_level if !defined($v); |
2d404ffc DM |
1435 | |
1436 | return undef if $v eq '' || $v eq 'nolog'; | |
1437 | ||
1438 | $v = $log_level_hash->{$v} if defined($log_level_hash->{$v}); | |
1439 | ||
1440 | return $v if ($v >= 0) && ($v <= 7); | |
1441 | ||
1442 | warn "unknown log level ($k = '$v')\n"; | |
1443 | ||
1444 | return undef; | |
1445 | } | |
1446 | ||
d8f2505e | 1447 | sub generate_std_chains { |
2d404ffc DM |
1448 | my ($ruleset, $options) = @_; |
1449 | ||
1450 | my $loglevel = get_option_log_level($options, 'smurf_log_level'); | |
1451 | ||
1452 | # same as shorewall smurflog. | |
1453 | if (defined($loglevel)) { | |
1454 | $pve_std_chains-> {'PVEFW-smurflog'} = [ | |
2f3d8d76 | 1455 | "-j LOG --log-prefix \"smurfs-dropped: \" --log-level $loglevel", |
2d404ffc DM |
1456 | "-j DROP", |
1457 | ]; | |
1458 | } else { | |
1459 | $pve_std_chains-> {'PVEFW-smurflog'} = [ "-j DROP" ]; | |
1460 | } | |
1461 | ||
1462 | # same as shorewall logflags action. | |
1463 | $loglevel = get_option_log_level($options, 'tcp_flags_log_level'); | |
1464 | if (defined($loglevel)) { | |
1465 | $pve_std_chains-> {'PVEFW-logflags'} = [ | |
2f3d8d76 | 1466 | "-j LOG --log-prefix \"logflags-dropped: \" --log-level $loglevel --log-ip-options", |
2d404ffc DM |
1467 | "-j DROP", |
1468 | ]; | |
1469 | } else { | |
1470 | $pve_std_chains-> {'PVEFW-logflags'} = [ "-j DROP" ]; | |
1471 | } | |
d8f2505e DM |
1472 | |
1473 | foreach my $chain (keys %$pve_std_chains) { | |
1474 | ruleset_create_chain($ruleset, $chain); | |
1475 | foreach my $rule (@{$pve_std_chains->{$chain}}) { | |
1476 | if (ref($rule)) { | |
1477 | ruleset_generate_rule($ruleset, $chain, $rule); | |
1478 | } else { | |
1479 | ruleset_addrule($ruleset, $chain, $rule); | |
1480 | } | |
1481 | } | |
1482 | } | |
1483 | } | |
1484 | ||
6b9f68a2 DM |
1485 | sub save_pvefw_status { |
1486 | my ($status) = @_; | |
1487 | ||
1488 | die "unknown status '$status' - internal error" | |
1489 | if $status !~ m/^(stopped|active)$/; | |
1490 | ||
1491 | mkdir dirname($pve_fw_status_filename); | |
1492 | PVE::Tools::file_set_contents($pve_fw_status_filename, $status); | |
1493 | } | |
1494 | ||
1495 | sub read_pvefw_status { | |
1496 | ||
1497 | my $status = 'unknown'; | |
1498 | ||
1499 | return 'stopped' if ! -f $pve_fw_status_filename; | |
1500 | ||
1501 | eval { | |
1502 | $status = PVE::Tools::file_get_contents($pve_fw_status_filename); | |
1503 | }; | |
1504 | warn $@ if $@; | |
1505 | ||
1506 | return $status; | |
1507 | } | |
1508 | ||
5e1267a5 | 1509 | sub compile { |
5e1267a5 | 1510 | my $vmdata = read_local_vm_config(); |
6fc63ffd | 1511 | my $vmfw_configs = read_vm_firewall_configs($vmdata); |
6158271d | 1512 | |
92e976b3 | 1513 | my $groups_conf = {}; |
51bae274 DM |
1514 | my $filename = "/etc/pve/firewall/groups.fw"; |
1515 | if (my $fh = IO::File->new($filename, O_RDONLY)) { | |
92e976b3 | 1516 | $groups_conf = parse_group_fw_rules($filename, $fh); |
51bae274 | 1517 | } |
5e1267a5 | 1518 | |
3fa83edf DM |
1519 | #print Dumper($rules); |
1520 | ||
1521 | my $ruleset = {}; | |
1522 | ||
dec84fcd DM |
1523 | ruleset_create_chain($ruleset, "PVEFW-INPUT"); |
1524 | ruleset_create_chain($ruleset, "PVEFW-OUTPUT"); | |
5b1df9a0 | 1525 | |
fadb13dd | 1526 | ruleset_create_chain($ruleset, "PVEFW-FORWARD"); |
5b1df9a0 | 1527 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT"); |
3fa83edf | 1528 | |
92e976b3 DM |
1529 | my $hostfw_options = {}; |
1530 | my $hostfw_conf; | |
4e6112f9 | 1531 | |
51bae274 DM |
1532 | $filename = "/etc/pve/local/host.fw"; |
1533 | if (my $fh = IO::File->new($filename, O_RDONLY)) { | |
92e976b3 DM |
1534 | $hostfw_conf = parse_host_fw_rules($filename, $fh); |
1535 | $hostfw_options = $hostfw_conf->{options}; | |
2d404ffc | 1536 | } |
fadb13dd | 1537 | |
92e976b3 | 1538 | generate_std_chains($ruleset, $hostfw_options); |
fadb13dd | 1539 | |
92e976b3 DM |
1540 | my $hostfw_enable = $hostfw_conf && |
1541 | !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0)); | |
2d404ffc | 1542 | |
d18c1e2b | 1543 | enable_host_firewall($ruleset, $hostfw_conf, $groups_conf) if $hostfw_enable; |
3fa83edf | 1544 | |
6158271d | 1545 | # generate firewall rules for QEMU VMs |
3fa83edf DM |
1546 | foreach my $vmid (keys %{$vmdata->{qemu}}) { |
1547 | my $conf = $vmdata->{qemu}->{$vmid}; | |
6fc63ffd | 1548 | my $vmfw_conf = $vmfw_configs->{$vmid}; |
fa9c4a6f DM |
1549 | next if !$vmfw_conf; |
1550 | next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0); | |
3fa83edf DM |
1551 | |
1552 | foreach my $netid (keys %$conf) { | |
1553 | next if $netid !~ m/^net(\d+)$/; | |
1554 | my $net = PVE::QemuServer::parse_net($conf->{$netid}); | |
1555 | next if !$net; | |
1556 | my $iface = "tap${vmid}i$1"; | |
5e1267a5 | 1557 | |
3fa83edf DM |
1558 | my $bridge = $net->{bridge}; |
1559 | next if !$bridge; # fixme: ? | |
1560 | ||
1561 | $bridge .= "v$net->{tag}" if $net->{tag}; | |
1562 | ||
2f3d8d76 | 1563 | generate_bridge_chains($ruleset, $hostfw_conf, $bridge); |
3fa83edf | 1564 | |
c29f55c9 | 1565 | my $macaddr = $net->{macaddr}; |
92e976b3 DM |
1566 | generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'IN'); |
1567 | generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'OUT'); | |
3fa83edf DM |
1568 | } |
1569 | } | |
c0413e35 | 1570 | |
3fa83edf DM |
1571 | return $ruleset; |
1572 | } | |
1573 | ||
1574 | sub get_ruleset_status { | |
1575 | my ($ruleset, $verbose) = @_; | |
1576 | ||
1577 | my $active_chains = iptables_get_chains(); | |
1578 | ||
1579 | my $statushash = {}; | |
1580 | ||
1581 | foreach my $chain (sort keys %$ruleset) { | |
09d5f68e | 1582 | my $digest = Digest::SHA->new('sha1'); |
3fa83edf DM |
1583 | foreach my $cmd (@{$ruleset->{$chain}}) { |
1584 | $digest->add("$cmd\n"); | |
1585 | } | |
1586 | my $sig = $digest->b64digest; | |
1587 | $statushash->{$chain}->{sig} = $sig; | |
1588 | ||
1589 | my $oldsig = $active_chains->{$chain}; | |
1590 | if (!defined($oldsig)) { | |
1591 | $statushash->{$chain}->{action} = 'create'; | |
1592 | } else { | |
1593 | if ($oldsig eq $sig) { | |
1594 | $statushash->{$chain}->{action} = 'exists'; | |
1595 | } else { | |
1596 | $statushash->{$chain}->{action} = 'update'; | |
1597 | } | |
1598 | } | |
1599 | print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose; | |
1600 | foreach my $cmd (@{$ruleset->{$chain}}) { | |
1601 | print "\t$cmd\n" if $verbose; | |
1602 | } | |
1603 | } | |
1604 | ||
1605 | foreach my $chain (sort keys %$active_chains) { | |
1606 | if (!defined($ruleset->{$chain})) { | |
1607 | my $sig = $active_chains->{$chain}; | |
1608 | $statushash->{$chain}->{action} = 'delete'; | |
1609 | $statushash->{$chain}->{sig} = $sig; | |
1610 | print "delete $chain ($sig)\n" if $verbose; | |
1611 | } | |
6158271d | 1612 | } |
3fa83edf DM |
1613 | |
1614 | return $statushash; | |
1615 | } | |
1616 | ||
1617 | sub print_ruleset { | |
1618 | my ($ruleset) = @_; | |
1619 | ||
1620 | get_ruleset_status($ruleset, 1); | |
1621 | } | |
1622 | ||
1623 | sub print_sig_rule { | |
1624 | my ($chain, $sig) = @_; | |
1625 | ||
09d5f68e DM |
1626 | # We just use this to store a SHA1 checksum used to detect changes |
1627 | return "-A $chain -m comment --comment \"PVESIG:$sig\"\n"; | |
b6360c3f DM |
1628 | } |
1629 | ||
6b9f68a2 | 1630 | sub get_rulset_cmdlist { |
a84f4d96 | 1631 | my ($ruleset, $verbose) = @_; |
3fa83edf | 1632 | |
3fa83edf DM |
1633 | my $cmdlist = "*filter\n"; # we pass this to iptables-restore; |
1634 | ||
1635 | my $statushash = get_ruleset_status($ruleset, $verbose); | |
1636 | ||
1637 | # create missing chains first | |
1638 | foreach my $chain (sort keys %$ruleset) { | |
1639 | my $stat = $statushash->{$chain}; | |
1640 | die "internal error" if !$stat; | |
1641 | next if $stat->{action} ne 'create'; | |
886aba9c | 1642 | |
3fa83edf DM |
1643 | $cmdlist .= ":$chain - [0:0]\n"; |
1644 | } | |
1645 | ||
dec84fcd | 1646 | my $rule = "INPUT -j PVEFW-INPUT"; |
3fa83edf DM |
1647 | if (!PVE::Firewall::iptables_rule_exist($rule)) { |
1648 | $cmdlist .= "-A $rule\n"; | |
1649 | } | |
dec84fcd | 1650 | $rule = "OUTPUT -j PVEFW-OUTPUT"; |
3fa83edf DM |
1651 | if (!PVE::Firewall::iptables_rule_exist($rule)) { |
1652 | $cmdlist .= "-A $rule\n"; | |
1653 | } | |
1654 | ||
dec84fcd | 1655 | $rule = "FORWARD -j PVEFW-FORWARD"; |
3fa83edf DM |
1656 | if (!PVE::Firewall::iptables_rule_exist($rule)) { |
1657 | $cmdlist .= "-A $rule\n"; | |
1658 | } | |
1659 | ||
1660 | foreach my $chain (sort keys %$ruleset) { | |
1661 | my $stat = $statushash->{$chain}; | |
1662 | die "internal error" if !$stat; | |
1663 | ||
1664 | if ($stat->{action} eq 'update' || $stat->{action} eq 'create') { | |
1665 | $cmdlist .= "-F $chain\n"; | |
1666 | foreach my $cmd (@{$ruleset->{$chain}}) { | |
1667 | $cmdlist .= "$cmd\n"; | |
1668 | } | |
1669 | $cmdlist .= print_sig_rule($chain, $stat->{sig}); | |
1670 | } elsif ($stat->{action} eq 'delete') { | |
f5d28682 | 1671 | die "internal error"; # this should not happen |
3fa83edf DM |
1672 | } elsif ($stat->{action} eq 'exists') { |
1673 | # do nothing | |
1674 | } else { | |
1675 | die "internal error - unknown status '$stat->{action}'"; | |
1676 | } | |
1677 | } | |
1678 | ||
f5d28682 DM |
1679 | foreach my $chain (keys %$statushash) { |
1680 | next if $statushash->{$chain}->{action} ne 'delete'; | |
1681 | $cmdlist .= "-F $chain\n"; | |
1682 | } | |
1683 | foreach my $chain (keys %$statushash) { | |
1684 | next if $statushash->{$chain}->{action} ne 'delete'; | |
fadb13dd DM |
1685 | next if $chain eq 'PVEFW-INPUT'; |
1686 | next if $chain eq 'PVEFW-OUTPUT'; | |
1687 | next if $chain eq 'PVEFW-FORWARD'; | |
f5d28682 DM |
1688 | $cmdlist .= "-X $chain\n"; |
1689 | } | |
1690 | ||
3fa83edf DM |
1691 | $cmdlist .= "COMMIT\n"; |
1692 | ||
6b9f68a2 DM |
1693 | return $cmdlist; |
1694 | } | |
1695 | ||
1696 | sub apply_ruleset { | |
1697 | my ($ruleset, $verbose) = @_; | |
1698 | ||
1699 | enable_bridge_firewall(); | |
1700 | ||
1701 | my $cmdlist = get_rulset_cmdlist($ruleset, $verbose); | |
1702 | ||
3fa83edf DM |
1703 | print $cmdlist if $verbose; |
1704 | ||
1705 | iptables_restore_cmdlist($cmdlist); | |
1706 | ||
6158271d | 1707 | # test: re-read status and check if everything is up to date |
6b9f68a2 | 1708 | my $statushash = get_ruleset_status($ruleset); |
3fa83edf DM |
1709 | |
1710 | my $errors; | |
1711 | foreach my $chain (sort keys %$ruleset) { | |
1712 | my $stat = $statushash->{$chain}; | |
1713 | if ($stat->{action} ne 'exists') { | |
1714 | warn "unable to update chain '$chain'\n"; | |
1715 | $errors = 1; | |
1716 | } | |
1717 | } | |
b6360c3f | 1718 | |
3fa83edf | 1719 | die "unable to apply firewall changes\n" if $errors; |
b6360c3f DM |
1720 | } |
1721 | ||
6b9f68a2 DM |
1722 | sub update { |
1723 | my ($start, $verbose) = @_; | |
1724 | ||
1725 | my $code = sub { | |
1726 | my $status = read_pvefw_status(); | |
1727 | ||
1728 | my $ruleset = PVE::Firewall::compile(); | |
1729 | ||
1730 | if ($start || $status eq 'active') { | |
1731 | ||
1732 | save_pvefw_status('active') if ($status ne 'active'); | |
1733 | ||
1734 | PVE::Firewall::apply_ruleset($ruleset, $verbose); | |
1735 | } else { | |
1736 | print "Firewall not active (status = $status)\n" if $verbose; | |
1737 | } | |
1738 | }; | |
1739 | ||
1740 | run_locked($code); | |
1741 | } | |
1742 | ||
1743 | ||
b6360c3f | 1744 | 1; |