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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::JSONSchema qw(get_standard_option); | |
9 | use PVE::Cluster; | |
10 | use PVE::ProcFSTools; | |
11 | use PVE::Tools; | |
12 | use File::Basename; | |
13 | use File::Path; | |
14 | use IO::File; | |
15 | use Net::IP; | |
16 | use PVE::Tools qw(run_command lock_file); | |
17 | use Encode; | |
18 | ||
19 | my $clusterfw_conf_filename = "/etc/pve/firewall/cluster.fw"; | |
20 | ||
21 | # dynamically include PVE::QemuServer and PVE::OpenVZ | |
22 | # to avoid dependency problems | |
23 | my $have_qemu_server; | |
24 | eval { | |
25 | require PVE::QemuServer; | |
26 | $have_qemu_server = 1; | |
27 | }; | |
28 | ||
29 | my $have_pve_manager; | |
30 | eval { | |
31 | require PVE::OpenVZ; | |
32 | $have_pve_manager = 1; | |
33 | }; | |
34 | ||
35 | use Data::Dumper; | |
36 | ||
37 | my $nodename = PVE::INotify::nodename(); | |
38 | ||
39 | my $pve_fw_lock_filename = "/var/lock/pvefw.lck"; | |
40 | my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status"; | |
41 | ||
42 | my $default_log_level = 'info'; | |
43 | ||
44 | my $log_level_hash = { | |
45 | debug => 7, | |
46 | info => 6, | |
47 | notice => 5, | |
48 | warning => 4, | |
49 | err => 3, | |
50 | crit => 2, | |
51 | alert => 1, | |
52 | emerg => 0, | |
53 | }; | |
54 | ||
55 | # imported/converted from: /usr/share/shorewall/macro.* | |
56 | my $pve_fw_macros = { | |
57 | 'Amanda' => [ | |
58 | { action => 'PARAM', proto => 'udp', dport => '10080' }, | |
59 | { action => 'PARAM', proto => 'tcp', dport => '10080' }, | |
60 | ], | |
61 | 'Auth' => [ | |
62 | { action => 'PARAM', proto => 'tcp', dport => '113' }, | |
63 | ], | |
64 | 'BGP' => [ | |
65 | { action => 'PARAM', proto => 'tcp', dport => '179' }, | |
66 | ], | |
67 | 'BitTorrent' => [ | |
68 | { action => 'PARAM', proto => 'tcp', dport => '6881:6889' }, | |
69 | { action => 'PARAM', proto => 'udp', dport => '6881' }, | |
70 | ], | |
71 | 'BitTorrent32' => [ | |
72 | { action => 'PARAM', proto => 'tcp', dport => '6881:6999' }, | |
73 | { action => 'PARAM', proto => 'udp', dport => '6881' }, | |
74 | ], | |
75 | 'CVS' => [ | |
76 | { action => 'PARAM', proto => 'tcp', dport => '2401' }, | |
77 | ], | |
78 | 'Citrix' => [ | |
79 | { action => 'PARAM', proto => 'tcp', dport => '1494' }, | |
80 | { action => 'PARAM', proto => 'udp', dport => '1604' }, | |
81 | { action => 'PARAM', proto => 'tcp', dport => '2598' }, | |
82 | ], | |
83 | 'DAAP' => [ | |
84 | { action => 'PARAM', proto => 'tcp', dport => '3689' }, | |
85 | { action => 'PARAM', proto => 'udp', dport => '3689' }, | |
86 | ], | |
87 | 'DCC' => [ | |
88 | { action => 'PARAM', proto => 'tcp', dport => '6277' }, | |
89 | ], | |
90 | 'DHCPfwd' => [ | |
91 | { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' }, | |
92 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' }, | |
93 | ], | |
94 | 'DNS' => [ | |
95 | { action => 'PARAM', proto => 'udp', dport => '53' }, | |
96 | { action => 'PARAM', proto => 'tcp', dport => '53' }, | |
97 | ], | |
98 | 'Distcc' => [ | |
99 | { action => 'PARAM', proto => 'tcp', dport => '3632' }, | |
100 | ], | |
101 | 'Edonkey' => [ | |
102 | { action => 'PARAM', proto => 'tcp', dport => '4662' }, | |
103 | { action => 'PARAM', proto => 'udp', dport => '4665' }, | |
104 | ], | |
105 | 'FTP' => [ | |
106 | { action => 'PARAM', proto => 'tcp', dport => '21' }, | |
107 | ], | |
108 | 'Finger' => [ | |
109 | { action => 'PARAM', proto => 'tcp', dport => '79' }, | |
110 | ], | |
111 | 'GNUnet' => [ | |
112 | { action => 'PARAM', proto => 'tcp', dport => '2086' }, | |
113 | { action => 'PARAM', proto => 'udp', dport => '2086' }, | |
114 | { action => 'PARAM', proto => 'tcp', dport => '1080' }, | |
115 | { action => 'PARAM', proto => 'udp', dport => '1080' }, | |
116 | ], | |
117 | 'GRE' => [ | |
118 | { action => 'PARAM', proto => '47' }, | |
119 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' }, | |
120 | ], | |
121 | 'Git' => [ | |
122 | { action => 'PARAM', proto => 'tcp', dport => '9418' }, | |
123 | ], | |
124 | 'Gnutella' => [ | |
125 | { action => 'PARAM', proto => 'tcp', dport => '6346' }, | |
126 | { action => 'PARAM', proto => 'udp', dport => '6346' }, | |
127 | ], | |
128 | 'HKP' => [ | |
129 | { action => 'PARAM', proto => 'tcp', dport => '11371' }, | |
130 | ], | |
131 | 'HTTP' => [ | |
132 | { action => 'PARAM', proto => 'tcp', dport => '80' }, | |
133 | ], | |
134 | 'HTTPS' => [ | |
135 | { action => 'PARAM', proto => 'tcp', dport => '443' }, | |
136 | ], | |
137 | 'ICPV2' => [ | |
138 | { action => 'PARAM', proto => 'udp', dport => '3130' }, | |
139 | ], | |
140 | 'ICQ' => [ | |
141 | { action => 'PARAM', proto => 'tcp', dport => '5190' }, | |
142 | ], | |
143 | 'IMAP' => [ | |
144 | { action => 'PARAM', proto => 'tcp', dport => '143' }, | |
145 | ], | |
146 | 'IMAPS' => [ | |
147 | { action => 'PARAM', proto => 'tcp', dport => '993' }, | |
148 | ], | |
149 | 'IPIP' => [ | |
150 | { action => 'PARAM', proto => '94' }, | |
151 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' }, | |
152 | ], | |
153 | 'IPP' => [ | |
154 | { action => 'PARAM', proto => 'tcp', dport => '631' }, | |
155 | ], | |
156 | 'IPPbrd' => [ | |
157 | { action => 'PARAM', proto => 'udp', dport => '631' }, | |
158 | ], | |
159 | 'IPPserver' => [ | |
160 | { action => 'PARAM', source => 'SOURCE', dest => 'DEST', proto => 'tcp', dport => '631' }, | |
161 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '631' }, | |
162 | ], | |
163 | 'IPsec' => [ | |
164 | { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' }, | |
165 | { action => 'PARAM', proto => '50' }, | |
166 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' }, | |
167 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' }, | |
168 | ], | |
169 | 'IPsecah' => [ | |
170 | { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' }, | |
171 | { action => 'PARAM', proto => '51' }, | |
172 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' }, | |
173 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' }, | |
174 | ], | |
175 | 'IPsecnat' => [ | |
176 | { action => 'PARAM', proto => 'udp', dport => '500' }, | |
177 | { action => 'PARAM', proto => 'udp', dport => '4500' }, | |
178 | { action => 'PARAM', proto => '50' }, | |
179 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' }, | |
180 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' }, | |
181 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' }, | |
182 | ], | |
183 | 'IRC' => [ | |
184 | { action => 'PARAM', proto => 'tcp', dport => '6667' }, | |
185 | ], | |
186 | 'JabberPlain' => [ | |
187 | { action => 'PARAM', proto => 'tcp', dport => '5222' }, | |
188 | ], | |
189 | 'JabberSecure' => [ | |
190 | { action => 'PARAM', proto => 'tcp', dport => '5223' }, | |
191 | ], | |
192 | 'Jabberd' => [ | |
193 | { action => 'PARAM', proto => 'tcp', dport => '5269' }, | |
194 | ], | |
195 | 'Jetdirect' => [ | |
196 | { action => 'PARAM', proto => 'tcp', dport => '9100' }, | |
197 | ], | |
198 | 'L2TP' => [ | |
199 | { action => 'PARAM', proto => 'udp', dport => '1701' }, | |
200 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' }, | |
201 | ], | |
202 | 'LDAP' => [ | |
203 | { action => 'PARAM', proto => 'tcp', dport => '389' }, | |
204 | ], | |
205 | 'LDAPS' => [ | |
206 | { action => 'PARAM', proto => 'tcp', dport => '636' }, | |
207 | ], | |
208 | 'MSNP' => [ | |
209 | { action => 'PARAM', proto => 'tcp', dport => '1863' }, | |
210 | ], | |
211 | 'MSSQL' => [ | |
212 | { action => 'PARAM', proto => 'tcp', dport => '1433' }, | |
213 | ], | |
214 | 'Mail' => [ | |
215 | { action => 'PARAM', proto => 'tcp', dport => '25' }, | |
216 | { action => 'PARAM', proto => 'tcp', dport => '465' }, | |
217 | { action => 'PARAM', proto => 'tcp', dport => '587' }, | |
218 | ], | |
219 | 'Munin' => [ | |
220 | { action => 'PARAM', proto => 'tcp', dport => '4949' }, | |
221 | ], | |
222 | 'MySQL' => [ | |
223 | { action => 'PARAM', proto => 'tcp', dport => '3306' }, | |
224 | ], | |
225 | 'NNTP' => [ | |
226 | { action => 'PARAM', proto => 'tcp', dport => '119' }, | |
227 | ], | |
228 | 'NNTPS' => [ | |
229 | { action => 'PARAM', proto => 'tcp', dport => '563' }, | |
230 | ], | |
231 | 'NTP' => [ | |
232 | { action => 'PARAM', proto => 'udp', dport => '123' }, | |
233 | ], | |
234 | 'NTPbi' => [ | |
235 | { action => 'PARAM', proto => 'udp', dport => '123' }, | |
236 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' }, | |
237 | ], | |
238 | 'NTPbrd' => [ | |
239 | { action => 'PARAM', proto => 'udp', dport => '123' }, | |
240 | { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '123' }, | |
241 | ], | |
242 | 'OSPF' => [ | |
243 | { action => 'PARAM', proto => '89' }, | |
244 | ], | |
245 | 'OpenVPN' => [ | |
246 | { action => 'PARAM', proto => 'udp', dport => '1194' }, | |
247 | ], | |
248 | 'PCA' => [ | |
249 | { action => 'PARAM', proto => 'udp', dport => '5632' }, | |
250 | { action => 'PARAM', proto => 'tcp', dport => '5631' }, | |
251 | ], | |
252 | 'POP3' => [ | |
253 | { action => 'PARAM', proto => 'tcp', dport => '110' }, | |
254 | ], | |
255 | 'POP3S' => [ | |
256 | { action => 'PARAM', proto => 'tcp', dport => '995' }, | |
257 | ], | |
258 | 'PPtP' => [ | |
259 | { action => 'PARAM', proto => '47' }, | |
260 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' }, | |
261 | { action => 'PARAM', proto => 'tcp', dport => '1723' }, | |
262 | ], | |
263 | 'Ping' => [ | |
264 | { action => 'PARAM', proto => 'icmp', dport => 'echo-request' }, | |
265 | ], | |
266 | 'PostgreSQL' => [ | |
267 | { action => 'PARAM', proto => 'tcp', dport => '5432' }, | |
268 | ], | |
269 | 'Printer' => [ | |
270 | { action => 'PARAM', proto => 'tcp', dport => '515' }, | |
271 | ], | |
272 | 'RDP' => [ | |
273 | { action => 'PARAM', proto => 'tcp', dport => '3389' }, | |
274 | ], | |
275 | 'RIPbi' => [ | |
276 | { action => 'PARAM', proto => 'udp', dport => '520' }, | |
277 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' }, | |
278 | ], | |
279 | 'RNDC' => [ | |
280 | { action => 'PARAM', proto => 'tcp', dport => '953' }, | |
281 | ], | |
282 | 'Razor' => [ | |
283 | { action => 'ACCEPT', proto => 'tcp', dport => '2703' }, | |
284 | ], | |
285 | 'Rdate' => [ | |
286 | { action => 'PARAM', proto => 'tcp', dport => '37' }, | |
287 | ], | |
288 | 'Rsync' => [ | |
289 | { action => 'PARAM', proto => 'tcp', dport => '873' }, | |
290 | ], | |
291 | 'SANE' => [ | |
292 | { action => 'PARAM', proto => 'tcp', dport => '6566' }, | |
293 | ], | |
294 | 'SMB' => [ | |
295 | { action => 'PARAM', proto => 'udp', dport => '135,445' }, | |
296 | { action => 'PARAM', proto => 'udp', dport => '137:139' }, | |
297 | { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' }, | |
298 | { action => 'PARAM', proto => 'tcp', dport => '135,139,445' }, | |
299 | ], | |
300 | 'SMBBI' => [ | |
301 | { action => 'PARAM', proto => 'udp', dport => '135,445' }, | |
302 | { action => 'PARAM', proto => 'udp', dport => '137:139' }, | |
303 | { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' }, | |
304 | { action => 'PARAM', proto => 'tcp', dport => '135,139,445' }, | |
305 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' }, | |
306 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' }, | |
307 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' }, | |
308 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' }, | |
309 | ], | |
310 | 'SMBswat' => [ | |
311 | { action => 'PARAM', proto => 'tcp', dport => '901' }, | |
312 | ], | |
313 | 'SMTP' => [ | |
314 | { action => 'PARAM', proto => 'tcp', dport => '25' }, | |
315 | ], | |
316 | 'SMTPS' => [ | |
317 | { action => 'PARAM', proto => 'tcp', dport => '465' }, | |
318 | ], | |
319 | 'SNMP' => [ | |
320 | { action => 'PARAM', proto => 'udp', dport => '161:162' }, | |
321 | { action => 'PARAM', proto => 'tcp', dport => '161' }, | |
322 | ], | |
323 | 'SPAMD' => [ | |
324 | { action => 'PARAM', proto => 'tcp', dport => '783' }, | |
325 | ], | |
326 | 'SSH' => [ | |
327 | { action => 'PARAM', proto => 'tcp', dport => '22' }, | |
328 | ], | |
329 | 'SVN' => [ | |
330 | { action => 'PARAM', proto => 'tcp', dport => '3690' }, | |
331 | ], | |
332 | 'SixXS' => [ | |
333 | { action => 'PARAM', proto => 'tcp', dport => '3874' }, | |
334 | { action => 'PARAM', proto => 'udp', dport => '3740' }, | |
335 | { action => 'PARAM', proto => '41' }, | |
336 | { action => 'PARAM', proto => 'udp', dport => '5072,8374' }, | |
337 | ], | |
338 | 'Squid' => [ | |
339 | { action => 'PARAM', proto => 'tcp', dport => '3128' }, | |
340 | ], | |
341 | 'Submission' => [ | |
342 | { action => 'PARAM', proto => 'tcp', dport => '587' }, | |
343 | ], | |
344 | 'Syslog' => [ | |
345 | { action => 'PARAM', proto => 'udp', dport => '514' }, | |
346 | { action => 'PARAM', proto => 'tcp', dport => '514' }, | |
347 | ], | |
348 | 'TFTP' => [ | |
349 | { action => 'PARAM', proto => 'udp', dport => '69' }, | |
350 | ], | |
351 | 'Telnet' => [ | |
352 | { action => 'PARAM', proto => 'tcp', dport => '23' }, | |
353 | ], | |
354 | 'Telnets' => [ | |
355 | { action => 'PARAM', proto => 'tcp', dport => '992' }, | |
356 | ], | |
357 | 'Time' => [ | |
358 | { action => 'PARAM', proto => 'tcp', dport => '37' }, | |
359 | ], | |
360 | 'Trcrt' => [ | |
361 | { action => 'PARAM', proto => 'udp', dport => '33434:33524' }, | |
362 | { action => 'PARAM', proto => 'icmp', dport => 'echo-request' }, | |
363 | ], | |
364 | 'VNC' => [ | |
365 | { action => 'PARAM', proto => 'tcp', dport => '5900:5909' }, | |
366 | ], | |
367 | 'VNCL' => [ | |
368 | { action => 'PARAM', proto => 'tcp', dport => '5500' }, | |
369 | ], | |
370 | 'Web' => [ | |
371 | { action => 'PARAM', proto => 'tcp', dport => '80' }, | |
372 | { action => 'PARAM', proto => 'tcp', dport => '443' }, | |
373 | ], | |
374 | 'Webcache' => [ | |
375 | { action => 'PARAM', proto => 'tcp', dport => '8080' }, | |
376 | ], | |
377 | 'Webmin' => [ | |
378 | { action => 'PARAM', proto => 'tcp', dport => '10000' }, | |
379 | ], | |
380 | 'Whois' => [ | |
381 | { action => 'PARAM', proto => 'tcp', dport => '43' }, | |
382 | ], | |
383 | }; | |
384 | ||
385 | my $pve_fw_parsed_macros; | |
386 | my $pve_fw_preferred_macro_names = {}; | |
387 | ||
388 | my $pve_std_chains = { | |
389 | 'PVEFW-SET-ACCEPT-MARK' => [ | |
390 | "-j MARK --set-mark 1", | |
391 | ], | |
392 | 'PVEFW-DropBroadcast' => [ | |
393 | # same as shorewall 'Broadcast' | |
394 | # simply DROP BROADCAST/MULTICAST/ANYCAST | |
395 | # we can use this to reduce logging | |
396 | { action => 'DROP', dsttype => 'BROADCAST' }, | |
397 | { action => 'DROP', dsttype => 'MULTICAST' }, | |
398 | { action => 'DROP', dsttype => 'ANYCAST' }, | |
399 | { action => 'DROP', dest => '224.0.0.0/4' }, | |
400 | ], | |
401 | 'PVEFW-reject' => [ | |
402 | # same as shorewall 'reject' | |
403 | { action => 'DROP', dsttype => 'BROADCAST' }, | |
404 | { action => 'DROP', source => '224.0.0.0/4' }, | |
405 | { action => 'DROP', proto => 'icmp' }, | |
406 | "-p tcp -j REJECT --reject-with tcp-reset", | |
407 | "-p udp -j REJECT --reject-with icmp-port-unreachable", | |
408 | "-p icmp -j REJECT --reject-with icmp-host-unreachable", | |
409 | "-j REJECT --reject-with icmp-host-prohibited", | |
410 | ], | |
411 | 'PVEFW-Drop' => [ | |
412 | # same as shorewall 'Drop', which is equal to DROP, | |
413 | # but REJECT/DROP some packages to reduce logging, | |
414 | # and ACCEPT critical ICMP types | |
415 | { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth' | |
416 | # we are not interested in BROADCAST/MULTICAST/ANYCAST | |
417 | { action => 'PVEFW-DropBroadcast' }, | |
418 | # ACCEPT critical ICMP types | |
419 | { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' }, | |
420 | { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' }, | |
421 | # Drop packets with INVALID state | |
422 | "-m conntrack --ctstate INVALID -j DROP", | |
423 | # Drop Microsoft SMB noise | |
424 | { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 }, | |
425 | { action => 'DROP', proto => 'udp', dport => '137:139'}, | |
426 | { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 }, | |
427 | { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 }, | |
428 | { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP | |
429 | # Drop new/NotSyn traffic so that it doesn't get logged | |
430 | "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP", | |
431 | # Drop DNS replies | |
432 | { action => 'DROP', proto => 'udp', sport => 53 }, | |
433 | ], | |
434 | 'PVEFW-Reject' => [ | |
435 | # same as shorewall 'Reject', which is equal to Reject, | |
436 | # but REJECT/DROP some packages to reduce logging, | |
437 | # and ACCEPT critical ICMP types | |
438 | { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth' | |
439 | # we are not interested in BROADCAST/MULTICAST/ANYCAST | |
440 | { action => 'PVEFW-DropBroadcast' }, | |
441 | # ACCEPT critical ICMP types | |
442 | { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' }, | |
443 | { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' }, | |
444 | # Drop packets with INVALID state | |
445 | "-m conntrack --ctstate INVALID -j DROP", | |
446 | # Drop Microsoft SMB noise | |
447 | { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 }, | |
448 | { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'}, | |
449 | { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 }, | |
450 | { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 }, | |
451 | { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP | |
452 | # Drop new/NotSyn traffic so that it doesn't get logged | |
453 | "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP", | |
454 | # Drop DNS replies | |
455 | { action => 'DROP', proto => 'udp', sport => 53 }, | |
456 | ], | |
457 | 'PVEFW-tcpflags' => [ | |
458 | # same as shorewall tcpflags action. | |
459 | # Packets arriving on this interface are checked for som illegal combinations of TCP flags | |
460 | "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags", | |
461 | "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags", | |
462 | "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags", | |
463 | "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags", | |
464 | "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags", | |
465 | ], | |
466 | 'PVEFW-smurfs' => [ | |
467 | # same as shorewall smurfs action | |
468 | # Filter packets for smurfs (packets with a broadcast address as the source). | |
469 | "-s 0.0.0.0/32 -j RETURN", | |
470 | "-m addrtype --src-type BROADCAST -g PVEFW-smurflog", | |
471 | "-s 224.0.0.0/4 -g PVEFW-smurflog", | |
472 | ], | |
473 | }; | |
474 | ||
475 | # iptables -p icmp -h | |
476 | my $icmp_type_names = { | |
477 | any => 1, | |
478 | 'echo-reply' => 1, | |
479 | 'destination-unreachable' => 1, | |
480 | 'network-unreachable' => 1, | |
481 | 'host-unreachable' => 1, | |
482 | 'protocol-unreachable' => 1, | |
483 | 'port-unreachable' => 1, | |
484 | 'fragmentation-needed' => 1, | |
485 | 'source-route-failed' => 1, | |
486 | 'network-unknown' => 1, | |
487 | 'host-unknown' => 1, | |
488 | 'network-prohibited' => 1, | |
489 | 'host-prohibited' => 1, | |
490 | 'TOS-network-unreachable' => 1, | |
491 | 'TOS-host-unreachable' => 1, | |
492 | 'communication-prohibited' => 1, | |
493 | 'host-precedence-violation' => 1, | |
494 | 'precedence-cutoff' => 1, | |
495 | 'source-quench' => 1, | |
496 | 'redirect' => 1, | |
497 | 'network-redirect' => 1, | |
498 | 'host-redirect' => 1, | |
499 | 'TOS-network-redirect' => 1, | |
500 | 'TOS-host-redirect' => 1, | |
501 | 'echo-request' => 1, | |
502 | 'router-advertisement' => 1, | |
503 | 'router-solicitation' => 1, | |
504 | 'time-exceeded' => 1, | |
505 | 'ttl-zero-during-transit' => 1, | |
506 | 'ttl-zero-during-reassembly' => 1, | |
507 | 'parameter-problem' => 1, | |
508 | 'ip-header-bad' => 1, | |
509 | 'required-option-missing' => 1, | |
510 | 'timestamp-request' => 1, | |
511 | 'timestamp-reply' => 1, | |
512 | 'address-mask-request' => 1, | |
513 | 'address-mask-reply' => 1, | |
514 | }; | |
515 | ||
516 | sub init_firewall_macros { | |
517 | ||
518 | $pve_fw_parsed_macros = {}; | |
519 | ||
520 | foreach my $k (keys %$pve_fw_macros) { | |
521 | my $lc_name = lc($k); | |
522 | my $macro = $pve_fw_macros->{$k}; | |
523 | $pve_fw_preferred_macro_names->{$lc_name} = $k; | |
524 | $pve_fw_parsed_macros->{$k} = $macro; | |
525 | } | |
526 | } | |
527 | ||
528 | init_firewall_macros(); | |
529 | ||
530 | my $etc_services; | |
531 | ||
532 | sub get_etc_services { | |
533 | ||
534 | return $etc_services if $etc_services; | |
535 | ||
536 | my $filename = "/etc/services"; | |
537 | ||
538 | my $fh = IO::File->new($filename, O_RDONLY); | |
539 | if (!$fh) { | |
540 | warn "unable to read '$filename' - $!\n"; | |
541 | return {}; | |
542 | } | |
543 | ||
544 | my $services = {}; | |
545 | ||
546 | while (my $line = <$fh>) { | |
547 | chomp ($line); | |
548 | next if $line =~m/^#/; | |
549 | next if ($line =~m/^\s*$/); | |
550 | ||
551 | if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) { | |
552 | $services->{byid}->{$2}->{name} = $1; | |
553 | $services->{byid}->{$2}->{port} = $2; | |
554 | $services->{byid}->{$2}->{$3} = 1; | |
555 | $services->{byname}->{$1} = $services->{byid}->{$2}; | |
556 | } | |
557 | } | |
558 | ||
559 | close($fh); | |
560 | ||
561 | $etc_services = $services; | |
562 | ||
563 | ||
564 | return $etc_services; | |
565 | } | |
566 | ||
567 | my $etc_protocols; | |
568 | ||
569 | sub get_etc_protocols { | |
570 | return $etc_protocols if $etc_protocols; | |
571 | ||
572 | my $filename = "/etc/protocols"; | |
573 | ||
574 | my $fh = IO::File->new($filename, O_RDONLY); | |
575 | if (!$fh) { | |
576 | warn "unable to read '$filename' - $!\n"; | |
577 | return {}; | |
578 | } | |
579 | ||
580 | my $protocols = {}; | |
581 | ||
582 | while (my $line = <$fh>) { | |
583 | chomp ($line); | |
584 | next if $line =~m/^#/; | |
585 | next if ($line =~m/^\s*$/); | |
586 | ||
587 | if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) { | |
588 | $protocols->{byid}->{$2}->{name} = $1; | |
589 | $protocols->{byname}->{$1} = $protocols->{byid}->{$2}; | |
590 | } | |
591 | } | |
592 | ||
593 | close($fh); | |
594 | ||
595 | $etc_protocols = $protocols; | |
596 | ||
597 | return $etc_protocols; | |
598 | } | |
599 | ||
600 | sub parse_address_list { | |
601 | my ($str) = @_; | |
602 | ||
603 | my $nbaor = 0; | |
604 | foreach my $aor (split(/,/, $str)) { | |
605 | if (!Net::IP->new($aor)) { | |
606 | my $err = Net::IP::Error(); | |
607 | die "invalid IP address: $err\n"; | |
608 | }else{ | |
609 | $nbaor++; | |
610 | } | |
611 | } | |
612 | return $nbaor; | |
613 | } | |
614 | ||
615 | sub parse_port_name_number_or_range { | |
616 | my ($str) = @_; | |
617 | ||
618 | my $services = PVE::Firewall::get_etc_services(); | |
619 | my $nbports = 0; | |
620 | foreach my $item (split(/,/, $str)) { | |
621 | my $portlist = ""; | |
622 | my $oldpon = undef; | |
623 | $nbports++; | |
624 | foreach my $pon (split(':', $item, 2)) { | |
625 | $pon = $services->{byname}->{$pon}->{port} if $services->{byname}->{$pon}->{port}; | |
626 | if ($pon =~ m/^\d+$/){ | |
627 | die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535; | |
628 | die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon); | |
629 | $oldpon = $pon; | |
630 | }else{ | |
631 | die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon}; | |
632 | } | |
633 | } | |
634 | } | |
635 | ||
636 | return ($nbports); | |
637 | } | |
638 | ||
639 | PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec); | |
640 | sub pve_fw_verify_port_spec { | |
641 | my ($portstr) = @_; | |
642 | ||
643 | parse_port_name_number_or_range($portstr); | |
644 | ||
645 | return $portstr; | |
646 | } | |
647 | ||
648 | PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec); | |
649 | sub pve_fw_verify_v4addr_spec { | |
650 | my ($list) = @_; | |
651 | ||
652 | parse_address_list($list); | |
653 | ||
654 | return $list; | |
655 | } | |
656 | ||
657 | PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec); | |
658 | sub pve_fw_verify_protocol_spec { | |
659 | my ($proto) = @_; | |
660 | ||
661 | my $protocols = get_etc_protocols(); | |
662 | ||
663 | die "unknown protocol '$proto'\n" if $proto && | |
664 | !(defined($protocols->{byname}->{$proto}) || | |
665 | defined($protocols->{byid}->{$proto})); | |
666 | ||
667 | return $proto; | |
668 | } | |
669 | ||
670 | ||
671 | # helper function for API | |
672 | ||
673 | my $rule_properties = { | |
674 | pos => { | |
675 | description => "Update rule at position <pos>.", | |
676 | type => 'integer', | |
677 | minimum => 0, | |
678 | optional => 1, | |
679 | }, | |
680 | digest => { | |
681 | type => 'string', | |
682 | optional => 1, | |
683 | maxLength => 27, | |
684 | minLength => 27, | |
685 | }, | |
686 | type => { | |
687 | type => 'string', | |
688 | optional => 1, | |
689 | enum => ['in', 'out', 'group'], | |
690 | }, | |
691 | action => { | |
692 | type => 'string', | |
693 | optional => 1, | |
694 | enum => ['ACCEPT', 'DROP', 'REJECT'], | |
695 | }, | |
696 | macro => { | |
697 | type => 'string', | |
698 | optional => 1, | |
699 | maxLength => 128, | |
700 | }, | |
701 | iface => get_standard_option('pve-iface', { optional => 1 }), | |
702 | source => { | |
703 | type => 'string', format => 'pve-fw-v4addr-spec', | |
704 | optional => 1, | |
705 | }, | |
706 | dest => { | |
707 | type => 'string', format => 'pve-fw-v4addr-spec', | |
708 | optional => 1, | |
709 | }, | |
710 | proto => { | |
711 | type => 'string', format => 'pve-fw-protocol-spec', | |
712 | optional => 1, | |
713 | }, | |
714 | enable => { | |
715 | type => 'boolean', | |
716 | optional => 1, | |
717 | }, | |
718 | sport => { | |
719 | type => 'string', format => 'pve-fw-port-spec', | |
720 | optional => 1, | |
721 | }, | |
722 | dport => { | |
723 | type => 'string', format => 'pve-fw-port-spec', | |
724 | optional => 1, | |
725 | }, | |
726 | comment => { | |
727 | type => 'string', | |
728 | optional => 1, | |
729 | }, | |
730 | }; | |
731 | ||
732 | sub cleanup_fw_rule { | |
733 | my ($rule, $digest, $pos) = @_; | |
734 | ||
735 | my $r = {}; | |
736 | ||
737 | foreach my $k (keys %$rule) { | |
738 | next if !$rule_properties->{$k}; | |
739 | my $v = $rule->{$k}; | |
740 | next if !defined($v); | |
741 | $r->{$k} = $v; | |
742 | $r->{digest} = $digest; | |
743 | $r->{pos} = $pos; | |
744 | } | |
745 | ||
746 | return $r; | |
747 | } | |
748 | ||
749 | sub add_rule_properties { | |
750 | my ($properties) = @_; | |
751 | ||
752 | foreach my $k (keys %$rule_properties) { | |
753 | $properties->{$k} = $rule_properties->{$k}; | |
754 | } | |
755 | ||
756 | return $properties; | |
757 | } | |
758 | ||
759 | sub copy_rule_data { | |
760 | my ($rule, $param) = @_; | |
761 | ||
762 | foreach my $k (keys %$rule_properties) { | |
763 | if (defined(my $v = $param->{$k})) { | |
764 | if ($v eq '' || $v eq '-') { | |
765 | delete $rule->{$k}; | |
766 | } else { | |
767 | $rule->{$k} = $v; | |
768 | } | |
769 | } else { | |
770 | delete $rule->{$k}; | |
771 | } | |
772 | } | |
773 | return $rule; | |
774 | } | |
775 | ||
776 | # core functions | |
777 | my $bridge_firewall_enabled = 0; | |
778 | ||
779 | sub enable_bridge_firewall { | |
780 | ||
781 | return if $bridge_firewall_enabled; # only once | |
782 | ||
783 | PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1"); | |
784 | PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1"); | |
785 | ||
786 | # make sure syncookies are enabled (which is default on newer 3.X kernels anyways) | |
787 | PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1"); | |
788 | ||
789 | $bridge_firewall_enabled = 1; | |
790 | } | |
791 | ||
792 | my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n"; | |
793 | ||
794 | sub iptables { | |
795 | my ($cmd) = @_; | |
796 | ||
797 | run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {}); | |
798 | } | |
799 | ||
800 | sub iptables_restore_cmdlist { | |
801 | my ($cmdlist) = @_; | |
802 | ||
803 | run_command("/sbin/iptables-restore -n", input => $cmdlist); | |
804 | } | |
805 | ||
806 | sub ipset_restore_cmdlist { | |
807 | my ($cmdlist) = @_; | |
808 | ||
809 | run_command(" /usr/sbin/ipset restore", input => $cmdlist); | |
810 | } | |
811 | ||
812 | sub iptables_get_chains { | |
813 | ||
814 | my $res = {}; | |
815 | ||
816 | # check what chains we want to track | |
817 | my $is_pvefw_chain = sub { | |
818 | my $name = shift; | |
819 | ||
820 | return 1 if $name =~ m/^PVEFW-\S+$/; | |
821 | ||
822 | return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/; | |
823 | ||
824 | return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable | |
825 | ||
826 | return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/; | |
827 | ||
828 | return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT|IPS)$/; | |
829 | return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/; | |
830 | ||
831 | return undef; | |
832 | }; | |
833 | ||
834 | my $table = ''; | |
835 | ||
836 | my $parser = sub { | |
837 | my $line = shift; | |
838 | ||
839 | return if $line =~ m/^#/; | |
840 | return if $line =~ m/^\s*$/; | |
841 | ||
842 | if ($line =~ m/^\*(\S+)$/) { | |
843 | $table = $1; | |
844 | return; | |
845 | } | |
846 | ||
847 | return if $table ne 'filter'; | |
848 | ||
849 | if ($line =~ m/^:(\S+)\s/) { | |
850 | my $chain = $1; | |
851 | return if !&$is_pvefw_chain($chain); | |
852 | $res->{$chain} = "unknown"; | |
853 | } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) { | |
854 | my ($chain, $sig) = ($1, $2); | |
855 | return if !&$is_pvefw_chain($chain); | |
856 | $res->{$chain} = $sig; | |
857 | } else { | |
858 | # simply ignore the rest | |
859 | return; | |
860 | } | |
861 | }; | |
862 | ||
863 | run_command("/sbin/iptables-save", outfunc => $parser); | |
864 | ||
865 | return $res; | |
866 | } | |
867 | ||
868 | sub ipset_chain_digest { | |
869 | my ($rules) = @_; | |
870 | my $digest = Digest::SHA->new('sha1'); | |
871 | foreach my $rule (sort @$rules) { # note: sorted | |
872 | $digest->add($rule); | |
873 | } | |
874 | return $digest->b64digest; | |
875 | } | |
876 | ||
877 | sub ipset_get_chains { | |
878 | ||
879 | my $res = {}; | |
880 | my $chains = {}; | |
881 | ||
882 | my $parser = sub { | |
883 | my $line = shift; | |
884 | ||
885 | return if $line =~ m/^#/; | |
886 | return if $line =~ m/^\s*$/; | |
887 | if ($line =~ m/^(\S+)\s(\S+)\s(\S+)/) { | |
888 | push @{$chains->{$2}}, $line; | |
889 | } else { | |
890 | # simply ignore the rest | |
891 | return; | |
892 | } | |
893 | }; | |
894 | ||
895 | run_command("/usr/sbin/ipset save", outfunc => $parser); | |
896 | ||
897 | # compute digest for each chain | |
898 | foreach my $chain (keys %$chains) { | |
899 | $res->{$chain} = ipset_chain_digest($chains->{$chain}); | |
900 | } | |
901 | ||
902 | return $res; | |
903 | } | |
904 | ||
905 | sub iptables_chain_exist { | |
906 | my ($chain) = @_; | |
907 | ||
908 | eval{ | |
909 | iptables("-n --list $chain"); | |
910 | }; | |
911 | return undef if $@; | |
912 | ||
913 | return 1; | |
914 | } | |
915 | ||
916 | sub iptables_rule_exist { | |
917 | my ($rule) = @_; | |
918 | ||
919 | eval{ | |
920 | iptables("-C $rule"); | |
921 | }; | |
922 | return undef if $@; | |
923 | ||
924 | return 1; | |
925 | } | |
926 | ||
927 | sub ruleset_generate_cmdstr { | |
928 | my ($ruleset, $chain, $rule, $actions, $goto) = @_; | |
929 | ||
930 | return if defined($rule->{enable}) && !$rule->{enable}; | |
931 | ||
932 | die "unable to emit macro - internal error" if $rule->{macro}; # should not happen | |
933 | ||
934 | my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0; | |
935 | my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0; | |
936 | my $nbsource = $rule->{source} ? parse_address_list( $rule->{source}) : 0; | |
937 | my $nbdest = $rule->{dest} ? parse_address_list($rule->{dest}) : 0; | |
938 | ||
939 | my @cmd = (); | |
940 | ||
941 | push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in}; | |
942 | push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out}; | |
943 | ||
944 | push @cmd, "-m iprange --src-range" if $nbsource > 1; | |
945 | push @cmd, "-s $rule->{source}" if $rule->{source}; | |
946 | push @cmd, "-m iprange --dst-range" if $nbdest > 1; | |
947 | push @cmd, "-d $rule->{dest}" if $rule->{dest}; | |
948 | ||
949 | if ($rule->{proto}) { | |
950 | push @cmd, "-p $rule->{proto}"; | |
951 | ||
952 | my $multiport = 0; | |
953 | $multiport++ if $nbdport > 1; | |
954 | $multiport++ if $nbsport > 1; | |
955 | ||
956 | push @cmd, "--match multiport" if $multiport; | |
957 | ||
958 | die "multiport: option '--sports' cannot be used together with '--dports'\n" | |
959 | if ($multiport == 2) && ($rule->{dport} ne $rule->{sport}); | |
960 | ||
961 | if ($rule->{dport}) { | |
962 | if ($rule->{proto} && $rule->{proto} eq 'icmp') { | |
963 | # Note: we use dport to store --icmp-type | |
964 | die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}}); | |
965 | push @cmd, "-m icmp --icmp-type $rule->{dport}"; | |
966 | } else { | |
967 | if ($nbdport > 1) { | |
968 | if ($multiport == 2) { | |
969 | push @cmd, "--ports $rule->{dport}"; | |
970 | } else { | |
971 | push @cmd, "--dports $rule->{dport}"; | |
972 | } | |
973 | } else { | |
974 | push @cmd, "--dport $rule->{dport}"; | |
975 | } | |
976 | } | |
977 | } | |
978 | ||
979 | if ($rule->{sport}) { | |
980 | if ($nbsport > 1) { | |
981 | push @cmd, "--sports $rule->{sport}" if $multiport != 2; | |
982 | } else { | |
983 | push @cmd, "--sport $rule->{sport}"; | |
984 | } | |
985 | } | |
986 | } elsif ($rule->{dport} || $rule->{sport}) { | |
987 | warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport}; | |
988 | warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport}; | |
989 | } | |
990 | ||
991 | push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype}; | |
992 | ||
993 | if (my $action = $rule->{action}) { | |
994 | $action = $actions->{$action} if defined($actions->{$action}); | |
995 | $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK'; | |
996 | push @cmd, $goto ? "-g $action" : "-j $action"; | |
997 | } | |
998 | ||
999 | return scalar(@cmd) ? join(' ', @cmd) : undef; | |
1000 | } | |
1001 | ||
1002 | my $apply_macro = sub { | |
1003 | my ($macro_name, $param) = @_; | |
1004 | ||
1005 | my $macro_rules = $pve_fw_parsed_macros->{$macro_name}; | |
1006 | die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen | |
1007 | ||
1008 | my $rules = []; | |
1009 | ||
1010 | foreach my $templ (@$macro_rules) { | |
1011 | my $rule = {}; | |
1012 | my $param_used = {}; | |
1013 | foreach my $k (keys %$templ) { | |
1014 | my $v = $templ->{$k}; | |
1015 | if ($v eq 'PARAM') { | |
1016 | $v = $param->{$k}; | |
1017 | $param_used->{$k} = 1; | |
1018 | } elsif ($v eq 'DEST') { | |
1019 | $v = $param->{dest}; | |
1020 | $param_used->{dest} = 1; | |
1021 | } elsif ($v eq 'SOURCE') { | |
1022 | $v = $param->{source}; | |
1023 | $param_used->{source} = 1; | |
1024 | } | |
1025 | ||
1026 | die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v); | |
1027 | $rule->{$k} = $v; | |
1028 | } | |
1029 | foreach my $k (keys %$param) { | |
1030 | next if $k eq 'macro'; | |
1031 | next if !defined($param->{$k}); | |
1032 | next if $param_used->{$k}; | |
1033 | if (defined($rule->{$k})) { | |
1034 | die "parameter '$k' already define in macro (value = '$rule->{$k}')\n" | |
1035 | if $rule->{$k} ne $param->{$k}; | |
1036 | } else { | |
1037 | $rule->{$k} = $param->{$k}; | |
1038 | } | |
1039 | } | |
1040 | push @$rules, $rule; | |
1041 | } | |
1042 | ||
1043 | return $rules; | |
1044 | }; | |
1045 | ||
1046 | sub ruleset_generate_rule { | |
1047 | my ($ruleset, $chain, $rule, $actions, $goto) = @_; | |
1048 | ||
1049 | my $rules; | |
1050 | ||
1051 | if ($rule->{macro}) { | |
1052 | $rules = &$apply_macro($rule->{macro}, $rule); | |
1053 | } else { | |
1054 | $rules = [ $rule ]; | |
1055 | } | |
1056 | ||
1057 | foreach my $tmp (@$rules) { | |
1058 | if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto)) { | |
1059 | ruleset_addrule($ruleset, $chain, $cmdstr); | |
1060 | } | |
1061 | } | |
1062 | } | |
1063 | ||
1064 | sub ruleset_generate_rule_insert { | |
1065 | my ($ruleset, $chain, $rule, $actions, $goto) = @_; | |
1066 | ||
1067 | die "implement me" if $rule->{macro}; # not implemented, because not needed so far | |
1068 | ||
1069 | if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) { | |
1070 | ruleset_insertrule($ruleset, $chain, $cmdstr); | |
1071 | } | |
1072 | } | |
1073 | ||
1074 | sub ruleset_create_chain { | |
1075 | my ($ruleset, $chain) = @_; | |
1076 | ||
1077 | die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28; | |
1078 | die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format | |
1079 | ||
1080 | die "chain '$chain' already exists\n" if $ruleset->{$chain}; | |
1081 | ||
1082 | $ruleset->{$chain} = []; | |
1083 | } | |
1084 | ||
1085 | sub ruleset_chain_exist { | |
1086 | my ($ruleset, $chain) = @_; | |
1087 | ||
1088 | return $ruleset->{$chain} ? 1 : undef; | |
1089 | } | |
1090 | ||
1091 | sub ruleset_addrule { | |
1092 | my ($ruleset, $chain, $rule) = @_; | |
1093 | ||
1094 | die "no such chain '$chain'\n" if !$ruleset->{$chain}; | |
1095 | ||
1096 | push @{$ruleset->{$chain}}, "-A $chain $rule"; | |
1097 | } | |
1098 | ||
1099 | sub ruleset_insertrule { | |
1100 | my ($ruleset, $chain, $rule) = @_; | |
1101 | ||
1102 | die "no such chain '$chain'\n" if !$ruleset->{$chain}; | |
1103 | ||
1104 | unshift @{$ruleset->{$chain}}, "-A $chain $rule"; | |
1105 | } | |
1106 | ||
1107 | sub get_log_rule_base { | |
1108 | my ($chain, $vmid, $msg, $loglevel) = @_; | |
1109 | ||
1110 | die "internal error - no log level" if !defined($loglevel); | |
1111 | ||
1112 | $vmid = 0 if !defined($vmid); | |
1113 | ||
1114 | # Note: we use special format for prefix to pass further | |
1115 | # info to log daemon (VMID, LOGVELEL and CHAIN) | |
1116 | ||
1117 | return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\""; | |
1118 | } | |
1119 | ||
1120 | sub ruleset_addlog { | |
1121 | my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_; | |
1122 | ||
1123 | return if !defined($loglevel); | |
1124 | ||
1125 | my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel); | |
1126 | ||
1127 | $logrule = "$rule $logrule" if defined($rule); | |
1128 | ||
1129 | ruleset_addrule($ruleset, $chain, $logrule) | |
1130 | } | |
1131 | ||
1132 | sub generate_bridge_chains { | |
1133 | my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_; | |
1134 | ||
1135 | my $options = $hostfw_conf->{options} || {}; | |
1136 | ||
1137 | die "error: detected direct route to bridge '$bridge'\n" | |
1138 | if !$options->{allow_bridge_route} && $routing_table->{$bridge}; | |
1139 | ||
1140 | if (!ruleset_chain_exist($ruleset, "$bridge-FW")) { | |
1141 | ruleset_create_chain($ruleset, "$bridge-FW"); | |
1142 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-out -j $bridge-FW"); | |
1143 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-in -j $bridge-FW"); | |
1144 | } | |
1145 | ||
1146 | if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) { | |
1147 | ruleset_create_chain($ruleset, "$bridge-OUT"); | |
1148 | ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-in -j $bridge-OUT"); | |
1149 | ruleset_insertrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-in -j $bridge-OUT"); | |
1150 | } | |
1151 | ||
1152 | if (!ruleset_chain_exist($ruleset, "$bridge-IN")) { | |
1153 | ruleset_create_chain($ruleset, "$bridge-IN"); | |
1154 | ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j $bridge-IN"); | |
1155 | ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT"); | |
1156 | # accept traffic to unmanaged bridge ports | |
1157 | ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j ACCEPT "); | |
1158 | } | |
1159 | } | |
1160 | ||
1161 | sub ruleset_add_chain_policy { | |
1162 | my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_; | |
1163 | ||
1164 | if ($policy eq 'ACCEPT') { | |
1165 | ||
1166 | ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' }, | |
1167 | { ACCEPT => $accept_action}); | |
1168 | ||
1169 | } elsif ($policy eq 'DROP') { | |
1170 | ||
1171 | ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop"); | |
1172 | ||
1173 | ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel); | |
1174 | ||
1175 | ruleset_addrule($ruleset, $chain, "-j DROP"); | |
1176 | } elsif ($policy eq 'REJECT') { | |
1177 | ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject"); | |
1178 | ||
1179 | ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel); | |
1180 | ||
1181 | ruleset_addrule($ruleset, $chain, "-g PVEFW-reject"); | |
1182 | } else { | |
1183 | # should not happen | |
1184 | die "internal error: unknown policy '$policy'"; | |
1185 | } | |
1186 | } | |
1187 | ||
1188 | sub ruleset_create_vm_chain { | |
1189 | my ($ruleset, $chain, $options, $macaddr, $direction) = @_; | |
1190 | ||
1191 | ruleset_create_chain($ruleset, $chain); | |
1192 | my $accept = generate_nfqueue($options); | |
1193 | ||
1194 | if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) { | |
1195 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs"); | |
1196 | } | |
1197 | ||
1198 | if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) { | |
1199 | if ($direction eq 'OUT') { | |
1200 | ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK', | |
1201 | proto => 'udp', sport => 68, dport => 67 }); | |
1202 | } else { | |
1203 | ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT', | |
1204 | proto => 'udp', sport => 67, dport => 68 }); | |
1205 | } | |
1206 | } | |
1207 | ||
1208 | if ($options->{tcpflags}) { | |
1209 | ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags"); | |
1210 | } | |
1211 | ||
1212 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP"); | |
1213 | if($direction eq 'OUT'){ | |
1214 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -g PVEFW-SET-ACCEPT-MARK"); | |
1215 | ||
1216 | }else{ | |
1217 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept"); | |
1218 | } | |
1219 | if ($direction eq 'OUT') { | |
1220 | if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) { | |
1221 | ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP"); | |
1222 | } | |
1223 | ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark | |
1224 | } | |
1225 | ||
1226 | ||
1227 | } | |
1228 | ||
1229 | sub ruleset_generate_vm_rules { | |
1230 | my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_; | |
1231 | ||
1232 | my $lc_direction = lc($direction); | |
1233 | ||
1234 | foreach my $rule (@$rules) { | |
1235 | next if $rule->{iface} && $rule->{iface} ne $netid; | |
1236 | next if !$rule->{enable}; | |
1237 | if ($rule->{type} eq 'group') { | |
1238 | my $group_chain = "GROUP-$rule->{action}-$direction"; | |
1239 | if(!ruleset_chain_exist($ruleset, $group_chain)){ | |
1240 | generate_group_rules($ruleset, $cluster_conf, $rule->{action}); | |
1241 | } | |
1242 | ruleset_addrule($ruleset, $chain, "-j $group_chain"); | |
1243 | if ($direction eq 'OUT'){ | |
1244 | ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j RETURN"); | |
1245 | }else{ | |
1246 | my $accept = generate_nfqueue($options); | |
1247 | ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $accept"); | |
1248 | } | |
1249 | ||
1250 | } else { | |
1251 | next if $rule->{type} ne $lc_direction; | |
1252 | if ($direction eq 'OUT') { | |
1253 | ruleset_generate_rule($ruleset, $chain, $rule, | |
1254 | { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }); | |
1255 | } else { | |
1256 | my $accept = generate_nfqueue($options); | |
1257 | ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept , REJECT => "PVEFW-reject" }); | |
1258 | } | |
1259 | } | |
1260 | } | |
1261 | } | |
1262 | ||
1263 | sub generate_nfqueue { | |
1264 | my ($options) = @_; | |
1265 | ||
1266 | my $action = ""; | |
1267 | if($options->{ips}){ | |
1268 | $action = "NFQUEUE"; | |
1269 | if($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) { | |
1270 | if(defined($3) && defined($1)) { | |
1271 | $action .= " --queue-balance $1:$3"; | |
1272 | }elsif (defined($1)) { | |
1273 | $action .= " --queue-num $1"; | |
1274 | } | |
1275 | } | |
1276 | $action .= " --queue-bypass"; | |
1277 | }else{ | |
1278 | $action = "ACCEPT"; | |
1279 | } | |
1280 | ||
1281 | return $action; | |
1282 | } | |
1283 | ||
1284 | sub ruleset_generate_vm_ipsrules { | |
1285 | my ($ruleset, $options, $direction, $iface, $bridge) = @_; | |
1286 | ||
1287 | if ($options->{ips} && $direction eq 'IN') { | |
1288 | my $nfqueue = generate_nfqueue($options); | |
1289 | ||
1290 | if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) { | |
1291 | ruleset_create_chain($ruleset, "PVEFW-IPS"); | |
1292 | } | |
1293 | ||
1294 | if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) { | |
1295 | ruleset_create_chain($ruleset, "$bridge-IPS"); | |
1296 | ruleset_insertrule($ruleset, "PVEFW-IPS", "-o $bridge -m physdev --physdev-is-out -j $bridge-IPS"); | |
1297 | } | |
1298 | ||
1299 | ruleset_addrule($ruleset, "$bridge-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue"); | |
1300 | } | |
1301 | } | |
1302 | ||
1303 | sub generate_venet_rules_direction { | |
1304 | my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_; | |
1305 | ||
1306 | parse_address_list($ip); # make sure we have a valid $ip list | |
1307 | ||
1308 | my $lc_direction = lc($direction); | |
1309 | ||
1310 | my $rules = $vmfw_conf->{rules}; | |
1311 | ||
1312 | my $options = $vmfw_conf->{options}; | |
1313 | my $loglevel = get_option_log_level($options, "log_level_${lc_direction}"); | |
1314 | ||
1315 | my $chain = "venet0-$vmid-$direction"; | |
1316 | ||
1317 | ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction); | |
1318 | ||
1319 | ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction); | |
1320 | ||
1321 | # implement policy | |
1322 | my $policy; | |
1323 | ||
1324 | if ($direction eq 'OUT') { | |
1325 | $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default | |
1326 | } else { | |
1327 | $policy = $options->{policy_in} || 'DROP'; # allow nothing by default | |
1328 | } | |
1329 | ||
1330 | my $accept = generate_nfqueue($options); | |
1331 | my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept; | |
1332 | ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action); | |
1333 | ||
1334 | # plug into FORWARD, INPUT and OUTPUT chain | |
1335 | if ($direction eq 'OUT') { | |
1336 | ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD", { | |
1337 | action => $chain, | |
1338 | source => $ip, | |
1339 | iface_in => 'venet0'}); | |
1340 | ||
1341 | ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT", { | |
1342 | action => $chain, | |
1343 | source => $ip, | |
1344 | iface_in => 'venet0'}); | |
1345 | } else { | |
1346 | ruleset_generate_rule($ruleset, "PVEFW-FORWARD", { | |
1347 | action => $chain, | |
1348 | dest => $ip, | |
1349 | iface_out => 'venet0'}); | |
1350 | ||
1351 | ruleset_generate_rule($ruleset, "PVEFW-OUTPUT", { | |
1352 | action => $chain, | |
1353 | dest => $ip, | |
1354 | iface_out => 'venet0'}); | |
1355 | } | |
1356 | } | |
1357 | ||
1358 | sub generate_tap_rules_direction { | |
1359 | my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_; | |
1360 | ||
1361 | my $lc_direction = lc($direction); | |
1362 | ||
1363 | my $rules = $vmfw_conf->{rules}; | |
1364 | ||
1365 | my $options = $vmfw_conf->{options}; | |
1366 | my $loglevel = get_option_log_level($options, "log_level_${lc_direction}"); | |
1367 | ||
1368 | my $tapchain = "$iface-$direction"; | |
1369 | ||
1370 | ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction); | |
1371 | ||
1372 | ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options); | |
1373 | ||
1374 | ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface, $bridge); | |
1375 | ||
1376 | # implement policy | |
1377 | my $policy; | |
1378 | ||
1379 | if ($direction eq 'OUT') { | |
1380 | $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default | |
1381 | } else { | |
1382 | $policy = $options->{policy_in} || 'DROP'; # allow nothing by default | |
1383 | } | |
1384 | ||
1385 | my $accept = generate_nfqueue($options); | |
1386 | my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept; | |
1387 | ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action); | |
1388 | ||
1389 | # plug the tap chain to bridge chain | |
1390 | if ($direction eq 'IN') { | |
1391 | ruleset_insertrule($ruleset, "$bridge-IN", | |
1392 | "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain"); | |
1393 | } else { | |
1394 | ruleset_insertrule($ruleset, "$bridge-OUT", | |
1395 | "-m physdev --physdev-in $iface -j $tapchain"); | |
1396 | } | |
1397 | } | |
1398 | ||
1399 | sub enable_host_firewall { | |
1400 | my ($ruleset, $hostfw_conf, $cluster_conf) = @_; | |
1401 | ||
1402 | # fixme: allow security groups | |
1403 | ||
1404 | my $options = $hostfw_conf->{options}; | |
1405 | my $rules = $hostfw_conf->{rules}; | |
1406 | ||
1407 | # host inbound firewall | |
1408 | my $chain = "PVEFW-HOST-IN"; | |
1409 | ruleset_create_chain($ruleset, $chain); | |
1410 | ||
1411 | my $loglevel = get_option_log_level($options, "log_level_in"); | |
1412 | ||
1413 | if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) { | |
1414 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs"); | |
1415 | } | |
1416 | ||
1417 | if ($options->{tcpflags}) { | |
1418 | ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags"); | |
1419 | } | |
1420 | ||
1421 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP"); | |
1422 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT"); | |
1423 | ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT"); | |
1424 | ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT"); | |
1425 | ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT"); | |
1426 | ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync | |
1427 | ||
1428 | # we use RETURN because we need to check also tap rules | |
1429 | my $accept_action = 'RETURN'; | |
1430 | ||
1431 | foreach my $rule (@$rules) { | |
1432 | next if $rule->{type} ne 'in'; | |
1433 | ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }); | |
1434 | } | |
1435 | ||
1436 | # implement input policy | |
1437 | my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default | |
1438 | ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action); | |
1439 | ||
1440 | # host outbound firewall | |
1441 | $chain = "PVEFW-HOST-OUT"; | |
1442 | ruleset_create_chain($ruleset, $chain); | |
1443 | ||
1444 | $loglevel = get_option_log_level($options, "log_level_out"); | |
1445 | ||
1446 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP"); | |
1447 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT"); | |
1448 | ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT"); | |
1449 | ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT"); | |
1450 | ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT"); | |
1451 | ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync | |
1452 | ||
1453 | # we use RETURN because we may want to check other thigs later | |
1454 | $accept_action = 'RETURN'; | |
1455 | ||
1456 | foreach my $rule (@$rules) { | |
1457 | next if $rule->{type} ne 'out'; | |
1458 | ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }); | |
1459 | } | |
1460 | ||
1461 | # implement output policy | |
1462 | $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default | |
1463 | ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action); | |
1464 | ||
1465 | ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT"); | |
1466 | ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN"); | |
1467 | } | |
1468 | ||
1469 | sub generate_group_rules { | |
1470 | my ($ruleset, $cluster_conf, $group) = @_; | |
1471 | die "no such security group '$group'\n" if !$cluster_conf->{groups}->{$group}; | |
1472 | ||
1473 | my $rules = $cluster_conf->{groups}->{$group}; | |
1474 | ||
1475 | my $chain = "GROUP-${group}-IN"; | |
1476 | ||
1477 | ruleset_create_chain($ruleset, $chain); | |
1478 | ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark | |
1479 | ||
1480 | foreach my $rule (@$rules) { | |
1481 | next if $rule->{type} ne 'in'; | |
1482 | ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }); | |
1483 | } | |
1484 | ||
1485 | $chain = "GROUP-${group}-OUT"; | |
1486 | ||
1487 | ruleset_create_chain($ruleset, $chain); | |
1488 | ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark | |
1489 | ||
1490 | foreach my $rule (@$rules) { | |
1491 | next if $rule->{type} ne 'out'; | |
1492 | # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to | |
1493 | # check also other tap rules later | |
1494 | ruleset_generate_rule($ruleset, $chain, $rule, | |
1495 | { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }); | |
1496 | } | |
1497 | } | |
1498 | ||
1499 | my $MAX_NETS = 32; | |
1500 | my $valid_netdev_names = {}; | |
1501 | for (my $i = 0; $i < $MAX_NETS; $i++) { | |
1502 | $valid_netdev_names->{"net$i"} = 1; | |
1503 | } | |
1504 | ||
1505 | sub parse_fw_rule { | |
1506 | my ($line, $need_iface, $allow_groups) = @_; | |
1507 | ||
1508 | my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport); | |
1509 | ||
1510 | # we can add single line comments to the end of the rule | |
1511 | my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//; | |
1512 | ||
1513 | # we can disable a rule when prefixed with '|' | |
1514 | my $enable = 1; | |
1515 | ||
1516 | $enable = 0 if $line =~ s/^\|//; | |
1517 | ||
1518 | my @data = split(/\s+/, $line); | |
1519 | my $expected_elements = $need_iface ? 8 : 7; | |
1520 | ||
1521 | die "wrong number of rule elements\n" if scalar(@data) > $expected_elements; | |
1522 | ||
1523 | if ($need_iface) { | |
1524 | ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data | |
1525 | } else { | |
1526 | ($type, $action, $source, $dest, $proto, $dport, $sport) = @data; | |
1527 | } | |
1528 | ||
1529 | die "incomplete rule\n" if ! ($type && $action); | |
1530 | ||
1531 | my $macro; | |
1532 | ||
1533 | $type = lc($type); | |
1534 | ||
1535 | if ($type eq 'in' || $type eq 'out') { | |
1536 | if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) { | |
1537 | # OK | |
1538 | } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) { | |
1539 | $action = $2; | |
1540 | my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)}; | |
1541 | die "unknown macro '$1'\n" if !$preferred_name; | |
1542 | $macro = $preferred_name; | |
1543 | } else { | |
1544 | die "unknown action '$action'\n"; | |
1545 | } | |
1546 | } elsif ($type eq 'group') { | |
1547 | die "wrong number of rule elements\n" if scalar(@data) != 3; | |
1548 | die "groups disabled\n" if !$allow_groups; | |
1549 | ||
1550 | die "invalid characters in group name\n" if $action !~ m/^[A-Za-z0-9_\-]+$/; | |
1551 | } else { | |
1552 | die "unknown rule type '$type'\n"; | |
1553 | } | |
1554 | ||
1555 | if ($need_iface) { | |
1556 | $iface = undef if $iface && $iface eq '-'; | |
1557 | } | |
1558 | ||
1559 | $proto = undef if $proto && $proto eq '-'; | |
1560 | pve_fw_verify_protocol_spec($proto) if $proto; | |
1561 | ||
1562 | $source = undef if $source && $source eq '-'; | |
1563 | $dest = undef if $dest && $dest eq '-'; | |
1564 | ||
1565 | $dport = undef if $dport && $dport eq '-'; | |
1566 | $sport = undef if $sport && $sport eq '-'; | |
1567 | ||
1568 | parse_port_name_number_or_range($dport) if defined($dport); | |
1569 | parse_port_name_number_or_range($sport) if defined($sport); | |
1570 | ||
1571 | parse_address_list($source) if $source; | |
1572 | parse_address_list($dest) if $dest; | |
1573 | ||
1574 | return { | |
1575 | type => $type, | |
1576 | enable => $enable, | |
1577 | comment => $comment, | |
1578 | action => $action, | |
1579 | macro => $macro, | |
1580 | iface => $iface, | |
1581 | source => $source, | |
1582 | dest => $dest, | |
1583 | proto => $proto, | |
1584 | dport => $dport, | |
1585 | sport => $sport, | |
1586 | }; | |
1587 | } | |
1588 | ||
1589 | sub parse_vmfw_option { | |
1590 | my ($line) = @_; | |
1591 | ||
1592 | my ($opt, $value); | |
1593 | ||
1594 | my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog"; | |
1595 | ||
1596 | if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags|ips):\s*(0|1)\s*$/i) { | |
1597 | $opt = lc($1); | |
1598 | $value = int($2); | |
1599 | } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) { | |
1600 | $opt = lc($1); | |
1601 | $value = $2 ? lc($3) : ''; | |
1602 | } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) { | |
1603 | $opt = lc($1); | |
1604 | $value = uc($3); | |
1605 | } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) { | |
1606 | $opt = lc($1); | |
1607 | $value = $2; | |
1608 | } else { | |
1609 | chomp $line; | |
1610 | die "can't parse option '$line'\n" | |
1611 | } | |
1612 | ||
1613 | return ($opt, $value); | |
1614 | } | |
1615 | ||
1616 | sub parse_hostfw_option { | |
1617 | my ($line) = @_; | |
1618 | ||
1619 | my ($opt, $value); | |
1620 | ||
1621 | my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog"; | |
1622 | ||
1623 | if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags|allow_bridge_route|optimize):\s*(0|1)\s*$/i) { | |
1624 | $opt = lc($1); | |
1625 | $value = int($2); | |
1626 | } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) { | |
1627 | $opt = lc($1); | |
1628 | $value = $2 ? lc($3) : ''; | |
1629 | } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) { | |
1630 | $opt = lc($1); | |
1631 | $value = uc($3); | |
1632 | } elsif ($line =~ m/^(nf_conntrack_max):\s*(\d+)\s*$/i) { | |
1633 | $opt = lc($1); | |
1634 | $value = int($2); | |
1635 | } else { | |
1636 | chomp $line; | |
1637 | die "can't parse option '$line'\n" | |
1638 | } | |
1639 | ||
1640 | return ($opt, $value); | |
1641 | } | |
1642 | ||
1643 | sub parse_clusterfw_option { | |
1644 | my ($line) = @_; | |
1645 | ||
1646 | my ($opt, $value); | |
1647 | ||
1648 | if ($line =~ m/^(enable):\s*(0|1)\s*$/i) { | |
1649 | $opt = lc($1); | |
1650 | $value = int($2); | |
1651 | } else { | |
1652 | chomp $line; | |
1653 | die "can't parse option '$line'\n" | |
1654 | } | |
1655 | ||
1656 | return ($opt, $value); | |
1657 | } | |
1658 | ||
1659 | sub parse_vm_fw_rules { | |
1660 | my ($filename, $fh) = @_; | |
1661 | ||
1662 | my $res = { rules => [], options => {}}; | |
1663 | ||
1664 | my $section; | |
1665 | ||
1666 | my $digest = Digest::SHA->new('sha1'); | |
1667 | ||
1668 | while (defined(my $line = <$fh>)) { | |
1669 | $digest->add($line); | |
1670 | ||
1671 | next if $line =~ m/^#/; | |
1672 | next if $line =~ m/^\s*$/; | |
1673 | ||
1674 | my $linenr = $fh->input_line_number(); | |
1675 | my $prefix = "$filename (line $linenr)"; | |
1676 | ||
1677 | if ($line =~ m/^\[(\S+)\]\s*$/i) { | |
1678 | $section = lc($1); | |
1679 | warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section}; | |
1680 | next; | |
1681 | } | |
1682 | if (!$section) { | |
1683 | warn "$prefix: skip line - no section"; | |
1684 | next; | |
1685 | } | |
1686 | ||
1687 | next if !$res->{$section}; # skip undefined section | |
1688 | ||
1689 | if ($section eq 'options') { | |
1690 | eval { | |
1691 | my ($opt, $value) = parse_vmfw_option($line); | |
1692 | $res->{options}->{$opt} = $value; | |
1693 | }; | |
1694 | warn "$prefix: $@" if $@; | |
1695 | next; | |
1696 | } | |
1697 | ||
1698 | my $rule; | |
1699 | eval { $rule = parse_fw_rule($line, 1, 1); }; | |
1700 | if (my $err = $@) { | |
1701 | warn "$prefix: $err"; | |
1702 | next; | |
1703 | } | |
1704 | ||
1705 | push @{$res->{$section}}, $rule; | |
1706 | } | |
1707 | ||
1708 | $res->{digest} = $digest->b64digest; | |
1709 | ||
1710 | return $res; | |
1711 | } | |
1712 | ||
1713 | sub parse_host_fw_rules { | |
1714 | my ($filename, $fh) = @_; | |
1715 | ||
1716 | my $res = { rules => [], options => {}}; | |
1717 | ||
1718 | my $section; | |
1719 | ||
1720 | my $digest = Digest::SHA->new('sha1'); | |
1721 | ||
1722 | while (defined(my $line = <$fh>)) { | |
1723 | $digest->add($line); | |
1724 | ||
1725 | next if $line =~ m/^#/; | |
1726 | next if $line =~ m/^\s*$/; | |
1727 | ||
1728 | my $linenr = $fh->input_line_number(); | |
1729 | my $prefix = "$filename (line $linenr)"; | |
1730 | ||
1731 | if ($line =~ m/^\[(\S+)\]\s*$/i) { | |
1732 | $section = lc($1); | |
1733 | warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section}; | |
1734 | next; | |
1735 | } | |
1736 | if (!$section) { | |
1737 | warn "$prefix: skip line - no section"; | |
1738 | next; | |
1739 | } | |
1740 | ||
1741 | next if !$res->{$section}; # skip undefined section | |
1742 | ||
1743 | if ($section eq 'options') { | |
1744 | eval { | |
1745 | my ($opt, $value) = parse_hostfw_option($line); | |
1746 | $res->{options}->{$opt} = $value; | |
1747 | }; | |
1748 | warn "$prefix: $@" if $@; | |
1749 | next; | |
1750 | } | |
1751 | ||
1752 | my $rule; | |
1753 | eval { $rule = parse_fw_rule($line, 1, 1); }; | |
1754 | if (my $err = $@) { | |
1755 | warn "$prefix: $err"; | |
1756 | next; | |
1757 | } | |
1758 | ||
1759 | push @{$res->{$section}}, $rule; | |
1760 | } | |
1761 | ||
1762 | $res->{digest} = $digest->b64digest; | |
1763 | ||
1764 | return $res; | |
1765 | } | |
1766 | ||
1767 | sub parse_cluster_fw_rules { | |
1768 | my ($filename, $fh) = @_; | |
1769 | ||
1770 | my $section; | |
1771 | my $group; | |
1772 | ||
1773 | my $res = { rules => {}, options => {}, groups => {}, ipset => {} }; | |
1774 | ||
1775 | my $digest = Digest::SHA->new('sha1'); | |
1776 | ||
1777 | while (defined(my $line = <$fh>)) { | |
1778 | $digest->add($line); | |
1779 | ||
1780 | next if $line =~ m/^#/; | |
1781 | next if $line =~ m/^\s*$/; | |
1782 | ||
1783 | my $linenr = $fh->input_line_number(); | |
1784 | my $prefix = "$filename (line $linenr)"; | |
1785 | ||
1786 | if ($line =~ m/^\[options\]$/i) { | |
1787 | $section = 'options'; | |
1788 | next; | |
1789 | } | |
1790 | ||
1791 | if ($line =~ m/^\[group\s+(\S+)\]\s*$/i) { | |
1792 | $section = 'groups'; | |
1793 | $group = lc($1); | |
1794 | next; | |
1795 | } | |
1796 | ||
1797 | if ($line =~ m/^\[rules\]$/i) { | |
1798 | $section = 'rules'; | |
1799 | next; | |
1800 | } | |
1801 | ||
1802 | if ($line =~ m/^\[ipgroup\s+(\S+)\]\s*$/i) { | |
1803 | $section = 'ipset'; | |
1804 | $group = lc($1); | |
1805 | $res->{$section}->{$group}->{type} = 'hash:ip family inet hashsize 1024 maxelem 65536 '; | |
1806 | next; | |
1807 | } | |
1808 | ||
1809 | if ($line =~ m/^\[netgroup\s+(\S+)\]\s*$/i) { | |
1810 | $section = 'ipset'; | |
1811 | $group = lc($1); | |
1812 | $res->{$section}->{$group}->{type} = 'hash:net family inet hashsize 1024 maxelem 65536 '; | |
1813 | next; | |
1814 | } | |
1815 | ||
1816 | if (!$section) { | |
1817 | warn "$prefix: skip line - no section"; | |
1818 | next; | |
1819 | } | |
1820 | ||
1821 | if ($section eq 'options') { | |
1822 | eval { | |
1823 | my ($opt, $value) = parse_clusterfw_option($line); | |
1824 | $res->{options}->{$opt} = $value; | |
1825 | }; | |
1826 | warn "$prefix: $@" if $@; | |
1827 | } elsif ($section eq 'rules') { | |
1828 | my $rule; | |
1829 | eval { $rule = parse_fw_rule($line, 1, 1); }; | |
1830 | if (my $err = $@) { | |
1831 | warn "$prefix: $err"; | |
1832 | next; | |
1833 | } | |
1834 | push @{$res->{$section}}, $rule; | |
1835 | } elsif ($section eq 'groups') { | |
1836 | my $rule; | |
1837 | eval { $rule = parse_fw_rule($line, 0, 0); }; | |
1838 | if (my $err = $@) { | |
1839 | warn "$prefix: $err"; | |
1840 | next; | |
1841 | } | |
1842 | push @{$res->{$section}->{$group}}, $rule; | |
1843 | } elsif ($section eq 'ipset') { | |
1844 | chomp $line; | |
1845 | my $ip; | |
1846 | if (!Net::IP->new($line)) { | |
1847 | warn "$prefix: $line is not an valid ip address"; | |
1848 | next; | |
1849 | } | |
1850 | push @{$res->{$section}->{$group}->{ip}}, $line; | |
1851 | } | |
1852 | } | |
1853 | ||
1854 | $res->{digest} = $digest->b64digest; | |
1855 | ||
1856 | return $res; | |
1857 | } | |
1858 | ||
1859 | sub run_locked { | |
1860 | my ($code, @param) = @_; | |
1861 | ||
1862 | my $timeout = 10; | |
1863 | ||
1864 | my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param); | |
1865 | ||
1866 | die $@ if $@; | |
1867 | ||
1868 | return $res; | |
1869 | } | |
1870 | ||
1871 | sub read_local_vm_config { | |
1872 | ||
1873 | my $openvz = {}; | |
1874 | my $qemu = {}; | |
1875 | ||
1876 | my $vmdata = { openvz => $openvz, qemu => $qemu }; | |
1877 | ||
1878 | my $vmlist = PVE::Cluster::get_vmlist(); | |
1879 | return $vmdata if !$vmlist || !$vmlist->{ids}; | |
1880 | my $ids = $vmlist->{ids}; | |
1881 | ||
1882 | foreach my $vmid (keys %$ids) { | |
1883 | next if !$vmid; # skip VE0 | |
1884 | my $d = $ids->{$vmid}; | |
1885 | next if !$d->{node} || $d->{node} ne $nodename; | |
1886 | next if !$d->{type}; | |
1887 | if ($d->{type} eq 'openvz') { | |
1888 | if ($have_pve_manager) { | |
1889 | my $cfspath = PVE::OpenVZ::cfs_config_path($vmid); | |
1890 | if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) { | |
1891 | $openvz->{$vmid} = $conf; | |
1892 | } | |
1893 | } | |
1894 | } elsif ($d->{type} eq 'qemu') { | |
1895 | if ($have_qemu_server) { | |
1896 | my $cfspath = PVE::QemuServer::cfs_config_path($vmid); | |
1897 | if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) { | |
1898 | $qemu->{$vmid} = $conf; | |
1899 | } | |
1900 | } | |
1901 | } | |
1902 | } | |
1903 | ||
1904 | return $vmdata; | |
1905 | }; | |
1906 | ||
1907 | sub load_vmfw_conf { | |
1908 | my ($vmid) = @_; | |
1909 | ||
1910 | my $vmfw_conf = {}; | |
1911 | ||
1912 | my $filename = "/etc/pve/firewall/$vmid.fw"; | |
1913 | if (my $fh = IO::File->new($filename, O_RDONLY)) { | |
1914 | $vmfw_conf = parse_vm_fw_rules($filename, $fh); | |
1915 | } | |
1916 | ||
1917 | return $vmfw_conf; | |
1918 | } | |
1919 | ||
1920 | sub read_vm_firewall_configs { | |
1921 | my ($vmdata) = @_; | |
1922 | my $vmfw_configs = {}; | |
1923 | ||
1924 | foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) { | |
1925 | my $vmfw_conf = load_vmfw_conf($vmid); | |
1926 | next if !$vmfw_conf->{options}; # skip if file does not exists | |
1927 | $vmfw_configs->{$vmid} = $vmfw_conf; | |
1928 | } | |
1929 | ||
1930 | return $vmfw_configs; | |
1931 | } | |
1932 | ||
1933 | sub get_option_log_level { | |
1934 | my ($options, $k) = @_; | |
1935 | ||
1936 | my $v = $options->{$k}; | |
1937 | $v = $default_log_level if !defined($v); | |
1938 | ||
1939 | return undef if $v eq '' || $v eq 'nolog'; | |
1940 | ||
1941 | $v = $log_level_hash->{$v} if defined($log_level_hash->{$v}); | |
1942 | ||
1943 | return $v if ($v >= 0) && ($v <= 7); | |
1944 | ||
1945 | warn "unknown log level ($k = '$v')\n"; | |
1946 | ||
1947 | return undef; | |
1948 | } | |
1949 | ||
1950 | sub generate_std_chains { | |
1951 | my ($ruleset, $options) = @_; | |
1952 | ||
1953 | my $loglevel = get_option_log_level($options, 'smurf_log_level'); | |
1954 | ||
1955 | # same as shorewall smurflog. | |
1956 | my $chain = 'PVEFW-smurflog'; | |
1957 | ||
1958 | push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel; | |
1959 | push @{$pve_std_chains->{$chain}}, "-j DROP"; | |
1960 | ||
1961 | # same as shorewall logflags action. | |
1962 | $loglevel = get_option_log_level($options, 'tcp_flags_log_level'); | |
1963 | $chain = 'PVEFW-logflags'; | |
1964 | # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG) | |
1965 | push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel; | |
1966 | push @{$pve_std_chains->{$chain}}, "-j DROP"; | |
1967 | ||
1968 | foreach my $chain (keys %$pve_std_chains) { | |
1969 | ruleset_create_chain($ruleset, $chain); | |
1970 | foreach my $rule (@{$pve_std_chains->{$chain}}) { | |
1971 | if (ref($rule)) { | |
1972 | ruleset_generate_rule($ruleset, $chain, $rule); | |
1973 | } else { | |
1974 | ruleset_addrule($ruleset, $chain, $rule); | |
1975 | } | |
1976 | } | |
1977 | } | |
1978 | } | |
1979 | ||
1980 | sub generate_ipset_chains { | |
1981 | my ($ipset_ruleset, $options) = @_; | |
1982 | ||
1983 | foreach my $ipset (keys %{$options->{ipset}}) { | |
1984 | generate_ipset($ipset_ruleset, $ipset, $options->{ipset}->{$ipset}); | |
1985 | } | |
1986 | } | |
1987 | ||
1988 | sub generate_ipset { | |
1989 | my ($ipset_ruleset, $name, $options) = @_; | |
1990 | ||
1991 | push @{$ipset_ruleset->{$name}}, "create $name $options->{type}"; | |
1992 | ||
1993 | foreach my $ip (@{$options->{ip}}) { | |
1994 | push @{$ipset_ruleset->{$name}}, "add $name $ip"; | |
1995 | } | |
1996 | } | |
1997 | ||
1998 | sub save_pvefw_status { | |
1999 | my ($status) = @_; | |
2000 | ||
2001 | die "unknown status '$status' - internal error" | |
2002 | if $status !~ m/^(stopped|active)$/; | |
2003 | ||
2004 | mkdir dirname($pve_fw_status_filename); | |
2005 | PVE::Tools::file_set_contents($pve_fw_status_filename, $status); | |
2006 | } | |
2007 | ||
2008 | sub read_pvefw_status { | |
2009 | ||
2010 | my $status = 'unknown'; | |
2011 | ||
2012 | return 'stopped' if ! -f $pve_fw_status_filename; | |
2013 | ||
2014 | eval { | |
2015 | $status = PVE::Tools::file_get_contents($pve_fw_status_filename); | |
2016 | }; | |
2017 | warn $@ if $@; | |
2018 | ||
2019 | return $status; | |
2020 | } | |
2021 | ||
2022 | # fixme: move to pve-common PVE::ProcFSTools | |
2023 | sub read_proc_net_route { | |
2024 | my $filename = "/proc/net/route"; | |
2025 | ||
2026 | my $res = {}; | |
2027 | ||
2028 | my $fh = IO::File->new ($filename, "r"); | |
2029 | return $res if !$fh; | |
2030 | ||
2031 | my $int_to_quad = sub { | |
2032 | return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0); | |
2033 | }; | |
2034 | ||
2035 | while (defined(my $line = <$fh>)) { | |
2036 | next if $line =~/^Iface\s+Destination/; # skip head | |
2037 | my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8]; | |
2038 | push @{$res->{$iface}}, { | |
2039 | dest => &$int_to_quad(hex($dest)), | |
2040 | gateway => &$int_to_quad(hex($gateway)), | |
2041 | mask => &$int_to_quad(hex($mask)), | |
2042 | metric => $metric, | |
2043 | mtu => $mtu, | |
2044 | }; | |
2045 | } | |
2046 | ||
2047 | return $res; | |
2048 | } | |
2049 | ||
2050 | sub load_clusterfw_conf { | |
2051 | ||
2052 | my $cluster_conf = {}; | |
2053 | if (my $fh = IO::File->new($clusterfw_conf_filename, O_RDONLY)) { | |
2054 | $cluster_conf = parse_cluster_fw_rules($clusterfw_conf_filename, $fh); | |
2055 | } | |
2056 | ||
2057 | return $cluster_conf; | |
2058 | } | |
2059 | ||
2060 | my $rules_to_conf = sub { | |
2061 | my ($rules, $need_iface) = @_; | |
2062 | ||
2063 | my $raw = ''; | |
2064 | ||
2065 | foreach my $rule (@$rules) { | |
2066 | if ($rule->{type} eq 'in' || $rule->{type} eq 'out') { | |
2067 | $raw .= '|' if defined($rule->{enable}) && !$rule->{enable}; | |
2068 | $raw .= uc($rule->{type}); | |
2069 | $raw .= " " . $rule->{action}; | |
2070 | $raw .= " " . ($rule->{iface} || '-') if $need_iface; | |
2071 | $raw .= " " . ($rule->{source} || '-'); | |
2072 | $raw .= " " . ($rule->{dest} || '-'); | |
2073 | $raw .= " " . ($rule->{proto} || '-'); | |
2074 | $raw .= " " . ($rule->{dport} || '-'); | |
2075 | $raw .= " " . ($rule->{sport} || '-'); | |
2076 | $raw .= " # " . encode('utf8', $rule->{comment}) | |
2077 | if $rule->{comment} && $rule->{comment} !~ m/^\s*$/; | |
2078 | $raw .= "\n"; | |
2079 | } else { | |
2080 | die "implement me '$rule->{type}'"; | |
2081 | } | |
2082 | } | |
2083 | ||
2084 | return $raw; | |
2085 | }; | |
2086 | ||
2087 | sub save_clusterfw_conf { | |
2088 | my ($cluster_conf) = @_; | |
2089 | ||
2090 | my $raw = ''; | |
2091 | ||
2092 | my $options = $cluster_conf->{options}; | |
2093 | if (scalar(keys %$options)) { | |
2094 | $raw .= "[OPTIONS]\n\n"; | |
2095 | foreach my $opt (keys %$options) { | |
2096 | $raw .= "$opt: $options->{$opt}\n"; | |
2097 | } | |
2098 | $raw .= "\n"; | |
2099 | } | |
2100 | ||
2101 | # fixme: save ipset | |
2102 | ||
2103 | my $rules = $cluster_conf->{rules}; | |
2104 | if (scalar(@$rules)) { | |
2105 | $raw .= "[RULES]\n\n"; | |
2106 | $raw .= &$rules_to_conf($rules, 1); | |
2107 | $raw .= "\n"; | |
2108 | } | |
2109 | ||
2110 | foreach my $group (sort keys %{$cluster_conf->{groups}}) { | |
2111 | my $rules = $cluster_conf->{groups}->{$group}; | |
2112 | $raw .= "[group $group]\n\n"; | |
2113 | $raw .= &$rules_to_conf($rules, 0); | |
2114 | $raw .= "\n"; | |
2115 | } | |
2116 | ||
2117 | PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw); | |
2118 | } | |
2119 | ||
2120 | sub load_hostfw_conf { | |
2121 | ||
2122 | my $hostfw_conf = {}; | |
2123 | my $filename = "/etc/pve/local/host.fw"; | |
2124 | if (my $fh = IO::File->new($filename, O_RDONLY)) { | |
2125 | $hostfw_conf = parse_host_fw_rules($filename, $fh); | |
2126 | } | |
2127 | return $hostfw_conf; | |
2128 | } | |
2129 | ||
2130 | sub compile { | |
2131 | my $vmdata = read_local_vm_config(); | |
2132 | my $vmfw_configs = read_vm_firewall_configs($vmdata); | |
2133 | ||
2134 | my $routing_table = read_proc_net_route(); | |
2135 | ||
2136 | my $cluster_conf = load_clusterfw_conf(); | |
2137 | ||
2138 | my $ipset_ruleset = {}; | |
2139 | generate_ipset_chains($ipset_ruleset, $cluster_conf); | |
2140 | ||
2141 | my $ruleset = {}; | |
2142 | ||
2143 | ruleset_create_chain($ruleset, "PVEFW-INPUT"); | |
2144 | ruleset_create_chain($ruleset, "PVEFW-OUTPUT"); | |
2145 | ||
2146 | ruleset_create_chain($ruleset, "PVEFW-FORWARD"); | |
2147 | ||
2148 | my $hostfw_conf = load_hostfw_conf(); | |
2149 | my $hostfw_options = $hostfw_conf->{options} || {}; | |
2150 | ||
2151 | generate_std_chains($ruleset, $hostfw_options); | |
2152 | ||
2153 | my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0)); | |
2154 | ||
2155 | enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable; | |
2156 | ||
2157 | # generate firewall rules for QEMU VMs | |
2158 | foreach my $vmid (keys %{$vmdata->{qemu}}) { | |
2159 | my $conf = $vmdata->{qemu}->{$vmid}; | |
2160 | my $vmfw_conf = $vmfw_configs->{$vmid}; | |
2161 | next if !$vmfw_conf; | |
2162 | next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0); | |
2163 | ||
2164 | foreach my $netid (keys %$conf) { | |
2165 | next if $netid !~ m/^net(\d+)$/; | |
2166 | my $net = PVE::QemuServer::parse_net($conf->{$netid}); | |
2167 | next if !$net; | |
2168 | my $iface = "tap${vmid}i$1"; | |
2169 | ||
2170 | my $bridge = $net->{bridge}; | |
2171 | next if !$bridge; # fixme: ? | |
2172 | ||
2173 | $bridge .= "v$net->{tag}" if $net->{tag}; | |
2174 | ||
2175 | generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table); | |
2176 | ||
2177 | my $macaddr = $net->{macaddr}; | |
2178 | generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr, | |
2179 | $vmfw_conf, $vmid, $bridge, 'IN'); | |
2180 | generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr, | |
2181 | $vmfw_conf, $vmid, $bridge, 'OUT'); | |
2182 | } | |
2183 | } | |
2184 | ||
2185 | # generate firewall rules for OpenVZ containers | |
2186 | foreach my $vmid (keys %{$vmdata->{openvz}}) { | |
2187 | my $conf = $vmdata->{openvz}->{$vmid}; | |
2188 | ||
2189 | my $vmfw_conf = $vmfw_configs->{$vmid}; | |
2190 | next if !$vmfw_conf; | |
2191 | next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0); | |
2192 | ||
2193 | if ($conf->{ip_address} && $conf->{ip_address}->{value}) { | |
2194 | my $ip = $conf->{ip_address}->{value}; | |
2195 | generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN'); | |
2196 | generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT'); | |
2197 | } | |
2198 | ||
2199 | if ($conf->{netif} && $conf->{netif}->{value}) { | |
2200 | my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value}); | |
2201 | foreach my $netid (keys %$netif) { | |
2202 | my $d = $netif->{$netid}; | |
2203 | my $bridge = $d->{bridge}; | |
2204 | if (!$bridge) { | |
2205 | warn "no bridge device for CT $vmid iface '$netid'\n"; | |
2206 | next; # fixme? | |
2207 | } | |
2208 | ||
2209 | generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table); | |
2210 | ||
2211 | my $macaddr = $d->{mac}; | |
2212 | my $iface = $d->{host_ifname}; | |
2213 | generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr, | |
2214 | $vmfw_conf, $vmid, $bridge, 'IN'); | |
2215 | generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr, | |
2216 | $vmfw_conf, $vmid, $bridge, 'OUT'); | |
2217 | } | |
2218 | } | |
2219 | } | |
2220 | ||
2221 | if($hostfw_options->{optimize}){ | |
2222 | ||
2223 | my $accept = ruleset_chain_exist($ruleset, "PVEFW-IPS") ? "PVEFW-IPS" : "ACCEPT"; | |
2224 | ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept"); | |
2225 | ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate INVALID -j DROP"); | |
2226 | } | |
2227 | ||
2228 | # fixme: what log level should we use here? | |
2229 | my $loglevel = get_option_log_level($hostfw_options, "log_level_out"); | |
2230 | ||
2231 | # fixme: should we really block inter-bridge traffic? | |
2232 | ||
2233 | # always allow traffic from containers? | |
2234 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN"); | |
2235 | ||
2236 | # disable interbridge routing | |
2237 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop"); | |
2238 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop"); | |
2239 | ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-o vmbr+"); | |
2240 | ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-i vmbr+"); | |
2241 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP"); | |
2242 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP"); | |
2243 | ||
2244 | return wantarray ? ($ruleset, $hostfw_conf, $ipset_ruleset) : $ruleset; | |
2245 | } | |
2246 | ||
2247 | sub get_ruleset_status { | |
2248 | my ($ruleset, $verbose, $ipset) = @_; | |
2249 | ||
2250 | my $active_chains = undef; | |
2251 | if($ipset){ | |
2252 | $active_chains = ipset_get_chains(); | |
2253 | }else{ | |
2254 | $active_chains = iptables_get_chains(); | |
2255 | } | |
2256 | ||
2257 | my $statushash = {}; | |
2258 | ||
2259 | foreach my $chain (sort keys %$ruleset) { | |
2260 | my $sig = ipset_chain_digest($ruleset->{$chain}); | |
2261 | $statushash->{$chain}->{sig} = $sig; | |
2262 | ||
2263 | my $oldsig = $active_chains->{$chain}; | |
2264 | if (!defined($oldsig)) { | |
2265 | $statushash->{$chain}->{action} = 'create'; | |
2266 | } else { | |
2267 | if ($oldsig eq $sig) { | |
2268 | $statushash->{$chain}->{action} = 'exists'; | |
2269 | } else { | |
2270 | $statushash->{$chain}->{action} = 'update'; | |
2271 | } | |
2272 | } | |
2273 | print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose; | |
2274 | foreach my $cmd (@{$ruleset->{$chain}}) { | |
2275 | print "\t$cmd\n" if $verbose; | |
2276 | } | |
2277 | } | |
2278 | ||
2279 | foreach my $chain (sort keys %$active_chains) { | |
2280 | if (!defined($ruleset->{$chain})) { | |
2281 | my $sig = $active_chains->{$chain}; | |
2282 | $statushash->{$chain}->{action} = 'delete'; | |
2283 | $statushash->{$chain}->{sig} = $sig; | |
2284 | print "delete $chain ($sig)\n" if $verbose; | |
2285 | } | |
2286 | } | |
2287 | ||
2288 | return $statushash; | |
2289 | } | |
2290 | ||
2291 | sub print_sig_rule { | |
2292 | my ($chain, $sig) = @_; | |
2293 | ||
2294 | # We just use this to store a SHA1 checksum used to detect changes | |
2295 | return "-A $chain -m comment --comment \"PVESIG:$sig\"\n"; | |
2296 | } | |
2297 | ||
2298 | sub get_rulset_cmdlist { | |
2299 | my ($ruleset, $verbose) = @_; | |
2300 | ||
2301 | my $cmdlist = "*filter\n"; # we pass this to iptables-restore; | |
2302 | ||
2303 | my $statushash = get_ruleset_status($ruleset, $verbose); | |
2304 | ||
2305 | # create missing chains first | |
2306 | foreach my $chain (sort keys %$ruleset) { | |
2307 | my $stat = $statushash->{$chain}; | |
2308 | die "internal error" if !$stat; | |
2309 | next if $stat->{action} ne 'create'; | |
2310 | ||
2311 | $cmdlist .= ":$chain - [0:0]\n"; | |
2312 | } | |
2313 | ||
2314 | my $rule = "INPUT -j PVEFW-INPUT"; | |
2315 | if (!PVE::Firewall::iptables_rule_exist($rule)) { | |
2316 | $cmdlist .= "-A $rule\n"; | |
2317 | } | |
2318 | $rule = "OUTPUT -j PVEFW-OUTPUT"; | |
2319 | if (!PVE::Firewall::iptables_rule_exist($rule)) { | |
2320 | $cmdlist .= "-A $rule\n"; | |
2321 | } | |
2322 | ||
2323 | $rule = "FORWARD -j PVEFW-FORWARD"; | |
2324 | if (!PVE::Firewall::iptables_rule_exist($rule)) { | |
2325 | $cmdlist .= "-A $rule\n"; | |
2326 | } | |
2327 | ||
2328 | foreach my $chain (sort keys %$ruleset) { | |
2329 | my $stat = $statushash->{$chain}; | |
2330 | die "internal error" if !$stat; | |
2331 | ||
2332 | if ($stat->{action} eq 'update' || $stat->{action} eq 'create') { | |
2333 | $cmdlist .= "-F $chain\n"; | |
2334 | foreach my $cmd (@{$ruleset->{$chain}}) { | |
2335 | $cmdlist .= "$cmd\n"; | |
2336 | } | |
2337 | $cmdlist .= print_sig_rule($chain, $stat->{sig}); | |
2338 | } elsif ($stat->{action} eq 'delete') { | |
2339 | die "internal error"; # this should not happen | |
2340 | } elsif ($stat->{action} eq 'exists') { | |
2341 | # do nothing | |
2342 | } else { | |
2343 | die "internal error - unknown status '$stat->{action}'"; | |
2344 | } | |
2345 | } | |
2346 | ||
2347 | foreach my $chain (keys %$statushash) { | |
2348 | next if $statushash->{$chain}->{action} ne 'delete'; | |
2349 | $cmdlist .= "-F $chain\n"; | |
2350 | } | |
2351 | foreach my $chain (keys %$statushash) { | |
2352 | next if $statushash->{$chain}->{action} ne 'delete'; | |
2353 | next if $chain eq 'PVEFW-INPUT'; | |
2354 | next if $chain eq 'PVEFW-OUTPUT'; | |
2355 | next if $chain eq 'PVEFW-FORWARD'; | |
2356 | $cmdlist .= "-X $chain\n"; | |
2357 | } | |
2358 | ||
2359 | my $changes = $cmdlist ne "*filter\n" ? 1 : 0; | |
2360 | ||
2361 | $cmdlist .= "COMMIT\n"; | |
2362 | ||
2363 | return wantarray ? ($cmdlist, $changes) : $cmdlist; | |
2364 | } | |
2365 | ||
2366 | sub get_ipset_cmdlist { | |
2367 | my ($ruleset, $verbose) = @_; | |
2368 | ||
2369 | my $cmdlist = ""; | |
2370 | ||
2371 | my $statushash = get_ruleset_status($ruleset, $verbose, 1); | |
2372 | ||
2373 | foreach my $chain (sort keys %$ruleset) { | |
2374 | my $stat = $statushash->{$chain}; | |
2375 | die "internal error" if !$stat; | |
2376 | ||
2377 | if ($stat->{action} eq 'create') { | |
2378 | foreach my $cmd (@{$ruleset->{$chain}}) { | |
2379 | $cmdlist .= "$cmd\n"; | |
2380 | } | |
2381 | } | |
2382 | ||
2383 | if ($stat->{action} eq 'update') { | |
2384 | my $chain_swap = $chain."_swap"; | |
2385 | ||
2386 | foreach my $cmd (@{$ruleset->{$chain}}) { | |
2387 | $cmd =~ s/$chain/$chain_swap/; | |
2388 | $cmdlist .= "$cmd\n"; | |
2389 | ||
2390 | } | |
2391 | $cmdlist .= "swap $chain_swap $chain\n"; | |
2392 | $cmdlist .= "flush $chain_swap\n"; | |
2393 | $cmdlist .= "destroy $chain_swap\n"; | |
2394 | } | |
2395 | ||
2396 | } | |
2397 | ||
2398 | foreach my $chain (keys %$statushash) { | |
2399 | next if $statushash->{$chain}->{action} ne 'delete'; | |
2400 | ||
2401 | $cmdlist .= "flush $chain\n"; | |
2402 | $cmdlist .= "destroy $chain\n"; | |
2403 | } | |
2404 | ||
2405 | my $changes = $cmdlist ? 1 : 0; | |
2406 | ||
2407 | return wantarray ? ($cmdlist, $changes) : $cmdlist; | |
2408 | } | |
2409 | ||
2410 | sub apply_ruleset { | |
2411 | my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_; | |
2412 | ||
2413 | enable_bridge_firewall(); | |
2414 | ||
2415 | update_nf_conntrack_max($hostfw_conf); | |
2416 | ||
2417 | my $ipsetcmdlist = get_ipset_cmdlist($ipset_ruleset, $verbose); | |
2418 | ||
2419 | my $cmdlist = get_rulset_cmdlist($ruleset, $verbose); | |
2420 | ||
2421 | print $ipsetcmdlist if $verbose; | |
2422 | ||
2423 | print $cmdlist if $verbose; | |
2424 | ||
2425 | ipset_restore_cmdlist($ipsetcmdlist); | |
2426 | ||
2427 | iptables_restore_cmdlist($cmdlist); | |
2428 | ||
2429 | # test: re-read status and check if everything is up to date | |
2430 | my $statushash = get_ruleset_status($ruleset); | |
2431 | ||
2432 | my $errors; | |
2433 | foreach my $chain (sort keys %$ruleset) { | |
2434 | my $stat = $statushash->{$chain}; | |
2435 | if ($stat->{action} ne 'exists') { | |
2436 | warn "unable to update chain '$chain'\n"; | |
2437 | $errors = 1; | |
2438 | } | |
2439 | } | |
2440 | ||
2441 | die "unable to apply firewall changes\n" if $errors; | |
2442 | } | |
2443 | ||
2444 | sub update_nf_conntrack_max { | |
2445 | my ($hostfw_conf) = @_; | |
2446 | ||
2447 | my $max = 65536; # reasonable default | |
2448 | ||
2449 | my $options = $hostfw_conf->{options} || {}; | |
2450 | ||
2451 | if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) { | |
2452 | $max = $options->{nf_conntrack_max}; | |
2453 | $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192 | |
2454 | } | |
2455 | ||
2456 | my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max"; | |
2457 | my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize"; | |
2458 | ||
2459 | my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max); | |
2460 | ||
2461 | if ($current != $max) { | |
2462 | my $hashsize = int($max/4); | |
2463 | PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize); | |
2464 | PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max); | |
2465 | } | |
2466 | } | |
2467 | ||
2468 | sub update { | |
2469 | my ($start, $verbose) = @_; | |
2470 | ||
2471 | my $code = sub { | |
2472 | my $status = read_pvefw_status(); | |
2473 | ||
2474 | my ($ruleset, $hostfw_conf, $ipset_ruleset) = compile(); | |
2475 | ||
2476 | if ($start || $status eq 'active') { | |
2477 | ||
2478 | save_pvefw_status('active') if ($status ne 'active'); | |
2479 | ||
2480 | apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose); | |
2481 | } else { | |
2482 | print "Firewall not active (status = $status)\n" if $verbose; | |
2483 | } | |
2484 | }; | |
2485 | ||
2486 | run_locked($code); | |
2487 | } | |
2488 | ||
2489 | ||
2490 | 1; |