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