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Commit | Line | Data |
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b6360c3f DM |
1 | package PVE::Firewall; |
2 | ||
3 | use warnings; | |
4 | use strict; | |
5 | use Data::Dumper; | |
09d5f68e | 6 | use Digest::SHA; |
c8301d63 DM |
7 | use PVE::INotify; |
8 | use PVE::Cluster; | |
5f0a912c | 9 | use PVE::ProcFSTools; |
f789653a | 10 | use PVE::Tools; |
6b9f68a2 | 11 | use File::Basename; |
5e1267a5 DM |
12 | use File::Path; |
13 | use IO::File; | |
ecbea048 | 14 | use Net::IP; |
06320eb0 | 15 | use PVE::Tools qw(run_command lock_file); |
30c1ae52 | 16 | use Encode; |
ecbea048 | 17 | |
d9fee004 DM |
18 | # dynamically include PVE::QemuServer and PVE::OpenVZ |
19 | # to avoid dependency problems | |
20 | my $have_qemu_server; | |
21 | eval { | |
22 | require PVE::QemuServer; | |
23 | $have_qemu_server = 1; | |
24 | }; | |
25 | ||
26 | my $have_pve_manager; | |
27 | eval { | |
28 | require PVE::OpenVZ; | |
29 | $have_pve_manager = 1; | |
30 | }; | |
31 | ||
5e1267a5 | 32 | use Data::Dumper; |
b6360c3f | 33 | |
c8301d63 DM |
34 | my $nodename = PVE::INotify::nodename(); |
35 | ||
06320eb0 | 36 | my $pve_fw_lock_filename = "/var/lock/pvefw.lck"; |
6b9f68a2 | 37 | my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status"; |
06320eb0 | 38 | |
2d404ffc DM |
39 | my $default_log_level = 'info'; |
40 | ||
41 | my $log_level_hash = { | |
42 | debug => 7, | |
43 | info => 6, | |
44 | notice => 5, | |
45 | warning => 4, | |
46 | err => 3, | |
47 | crit => 2, | |
48 | alert => 1, | |
49 | emerg => 0, | |
50 | }; | |
51 | ||
857f62c8 | 52 | # imported/converted from: /usr/share/shorewall/macro.* |
961b4928 | 53 | my $pve_fw_macros = { |
857f62c8 DM |
54 | 'Amanda' => [ |
55 | { action => 'PARAM', proto => 'udp', dport => '10080' }, | |
56 | { action => 'PARAM', proto => 'tcp', dport => '10080' }, | |
57 | ], | |
58 | 'Auth' => [ | |
59 | { action => 'PARAM', proto => 'tcp', dport => '113' }, | |
60 | ], | |
61 | 'BGP' => [ | |
62 | { action => 'PARAM', proto => 'tcp', dport => '179' }, | |
63 | ], | |
64 | 'BitTorrent' => [ | |
961b4928 | 65 | { action => 'PARAM', proto => 'tcp', dport => '6881:6889' }, |
857f62c8 DM |
66 | { action => 'PARAM', proto => 'udp', dport => '6881' }, |
67 | ], | |
68 | 'BitTorrent32' => [ | |
69 | { action => 'PARAM', proto => 'tcp', dport => '6881:6999' }, | |
70 | { action => 'PARAM', proto => 'udp', dport => '6881' }, | |
71 | ], | |
72 | 'CVS' => [ | |
73 | { action => 'PARAM', proto => 'tcp', dport => '2401' }, | |
74 | ], | |
75 | 'Citrix' => [ | |
76 | { action => 'PARAM', proto => 'tcp', dport => '1494' }, | |
77 | { action => 'PARAM', proto => 'udp', dport => '1604' }, | |
78 | { action => 'PARAM', proto => 'tcp', dport => '2598' }, | |
79 | ], | |
80 | 'DAAP' => [ | |
81 | { action => 'PARAM', proto => 'tcp', dport => '3689' }, | |
82 | { action => 'PARAM', proto => 'udp', dport => '3689' }, | |
83 | ], | |
84 | 'DCC' => [ | |
85 | { action => 'PARAM', proto => 'tcp', dport => '6277' }, | |
86 | ], | |
87 | 'DHCPfwd' => [ | |
88 | { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' }, | |
89 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' }, | |
90 | ], | |
91 | 'DNS' => [ | |
92 | { action => 'PARAM', proto => 'udp', dport => '53' }, | |
93 | { action => 'PARAM', proto => 'tcp', dport => '53' }, | |
94 | ], | |
95 | 'Distcc' => [ | |
96 | { action => 'PARAM', proto => 'tcp', dport => '3632' }, | |
97 | ], | |
98 | 'Edonkey' => [ | |
99 | { action => 'PARAM', proto => 'tcp', dport => '4662' }, | |
100 | { action => 'PARAM', proto => 'udp', dport => '4665' }, | |
961b4928 | 101 | ], |
857f62c8 DM |
102 | 'FTP' => [ |
103 | { action => 'PARAM', proto => 'tcp', dport => '21' }, | |
104 | ], | |
105 | 'Finger' => [ | |
106 | { action => 'PARAM', proto => 'tcp', dport => '79' }, | |
107 | ], | |
108 | 'GNUnet' => [ | |
109 | { action => 'PARAM', proto => 'tcp', dport => '2086' }, | |
110 | { action => 'PARAM', proto => 'udp', dport => '2086' }, | |
111 | { action => 'PARAM', proto => 'tcp', dport => '1080' }, | |
112 | { action => 'PARAM', proto => 'udp', dport => '1080' }, | |
113 | ], | |
114 | 'GRE' => [ | |
115 | { action => 'PARAM', proto => '47' }, | |
116 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' }, | |
117 | ], | |
118 | 'Git' => [ | |
119 | { action => 'PARAM', proto => 'tcp', dport => '9418' }, | |
120 | ], | |
121 | 'Gnutella' => [ | |
122 | { action => 'PARAM', proto => 'tcp', dport => '6346' }, | |
123 | { action => 'PARAM', proto => 'udp', dport => '6346' }, | |
124 | ], | |
125 | 'HKP' => [ | |
126 | { action => 'PARAM', proto => 'tcp', dport => '11371' }, | |
127 | ], | |
128 | 'HTTP' => [ | |
961b4928 DM |
129 | { action => 'PARAM', proto => 'tcp', dport => '80' }, |
130 | ], | |
857f62c8 DM |
131 | 'HTTPS' => [ |
132 | { action => 'PARAM', proto => 'tcp', dport => '443' }, | |
133 | ], | |
134 | 'ICPV2' => [ | |
135 | { action => 'PARAM', proto => 'udp', dport => '3130' }, | |
136 | ], | |
137 | 'ICQ' => [ | |
138 | { action => 'PARAM', proto => 'tcp', dport => '5190' }, | |
139 | ], | |
140 | 'IMAP' => [ | |
141 | { action => 'PARAM', proto => 'tcp', dport => '143' }, | |
142 | ], | |
143 | 'IMAPS' => [ | |
144 | { action => 'PARAM', proto => 'tcp', dport => '993' }, | |
145 | ], | |
146 | 'IPIP' => [ | |
147 | { action => 'PARAM', proto => '94' }, | |
148 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' }, | |
149 | ], | |
150 | 'IPP' => [ | |
151 | { action => 'PARAM', proto => 'tcp', dport => '631' }, | |
152 | ], | |
153 | 'IPPbrd' => [ | |
154 | { action => 'PARAM', proto => 'udp', dport => '631' }, | |
155 | ], | |
156 | 'IPPserver' => [ | |
157 | { action => 'PARAM', source => 'SOURCE', dest => 'DEST', proto => 'tcp', dport => '631' }, | |
158 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '631' }, | |
159 | ], | |
160 | 'IPsec' => [ | |
161 | { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' }, | |
162 | { action => 'PARAM', proto => '50' }, | |
163 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' }, | |
164 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' }, | |
165 | ], | |
166 | 'IPsecah' => [ | |
167 | { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' }, | |
168 | { action => 'PARAM', proto => '51' }, | |
169 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' }, | |
170 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' }, | |
171 | ], | |
172 | 'IPsecnat' => [ | |
173 | { action => 'PARAM', proto => 'udp', dport => '500' }, | |
174 | { action => 'PARAM', proto => 'udp', dport => '4500' }, | |
175 | { action => 'PARAM', proto => '50' }, | |
176 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' }, | |
177 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' }, | |
178 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' }, | |
179 | ], | |
180 | 'IRC' => [ | |
181 | { action => 'PARAM', proto => 'tcp', dport => '6667' }, | |
182 | ], | |
183 | 'JabberPlain' => [ | |
184 | { action => 'PARAM', proto => 'tcp', dport => '5222' }, | |
185 | ], | |
186 | 'JabberSecure' => [ | |
187 | { action => 'PARAM', proto => 'tcp', dport => '5223' }, | |
188 | ], | |
189 | 'Jabberd' => [ | |
190 | { action => 'PARAM', proto => 'tcp', dport => '5269' }, | |
191 | ], | |
192 | 'Jetdirect' => [ | |
193 | { action => 'PARAM', proto => 'tcp', dport => '9100' }, | |
194 | ], | |
195 | 'L2TP' => [ | |
196 | { action => 'PARAM', proto => 'udp', dport => '1701' }, | |
197 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' }, | |
198 | ], | |
199 | 'LDAP' => [ | |
200 | { action => 'PARAM', proto => 'tcp', dport => '389' }, | |
201 | ], | |
202 | 'LDAPS' => [ | |
203 | { action => 'PARAM', proto => 'tcp', dport => '636' }, | |
204 | ], | |
205 | 'MSNP' => [ | |
206 | { action => 'PARAM', proto => 'tcp', dport => '1863' }, | |
207 | ], | |
208 | 'MSSQL' => [ | |
209 | { action => 'PARAM', proto => 'tcp', dport => '1433' }, | |
210 | ], | |
211 | 'Mail' => [ | |
212 | { action => 'PARAM', proto => 'tcp', dport => '25' }, | |
213 | { action => 'PARAM', proto => 'tcp', dport => '465' }, | |
214 | { action => 'PARAM', proto => 'tcp', dport => '587' }, | |
215 | ], | |
216 | 'Munin' => [ | |
217 | { action => 'PARAM', proto => 'tcp', dport => '4949' }, | |
218 | ], | |
219 | 'MySQL' => [ | |
220 | { action => 'PARAM', proto => 'tcp', dport => '3306' }, | |
221 | ], | |
222 | 'NNTP' => [ | |
223 | { action => 'PARAM', proto => 'tcp', dport => '119' }, | |
224 | ], | |
225 | 'NNTPS' => [ | |
226 | { action => 'PARAM', proto => 'tcp', dport => '563' }, | |
227 | ], | |
228 | 'NTP' => [ | |
229 | { action => 'PARAM', proto => 'udp', dport => '123' }, | |
230 | ], | |
231 | 'NTPbi' => [ | |
232 | { action => 'PARAM', proto => 'udp', dport => '123' }, | |
233 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' }, | |
234 | ], | |
235 | 'NTPbrd' => [ | |
236 | { action => 'PARAM', proto => 'udp', dport => '123' }, | |
237 | { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '123' }, | |
238 | ], | |
239 | 'OSPF' => [ | |
240 | { action => 'PARAM', proto => '89' }, | |
241 | ], | |
242 | 'OpenVPN' => [ | |
243 | { action => 'PARAM', proto => 'udp', dport => '1194' }, | |
244 | ], | |
245 | 'PCA' => [ | |
246 | { action => 'PARAM', proto => 'udp', dport => '5632' }, | |
247 | { action => 'PARAM', proto => 'tcp', dport => '5631' }, | |
248 | ], | |
249 | 'POP3' => [ | |
250 | { action => 'PARAM', proto => 'tcp', dport => '110' }, | |
251 | ], | |
252 | 'POP3S' => [ | |
253 | { action => 'PARAM', proto => 'tcp', dport => '995' }, | |
254 | ], | |
255 | 'PPtP' => [ | |
256 | { action => 'PARAM', proto => '47' }, | |
257 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' }, | |
258 | { action => 'PARAM', proto => 'tcp', dport => '1723' }, | |
259 | ], | |
260 | 'Ping' => [ | |
269d4f13 | 261 | { action => 'PARAM', proto => 'icmp', dport => 'echo-request' }, |
857f62c8 DM |
262 | ], |
263 | 'PostgreSQL' => [ | |
264 | { action => 'PARAM', proto => 'tcp', dport => '5432' }, | |
265 | ], | |
266 | 'Printer' => [ | |
267 | { action => 'PARAM', proto => 'tcp', dport => '515' }, | |
268 | ], | |
269 | 'RDP' => [ | |
270 | { action => 'PARAM', proto => 'tcp', dport => '3389' }, | |
271 | ], | |
272 | 'RIPbi' => [ | |
273 | { action => 'PARAM', proto => 'udp', dport => '520' }, | |
274 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' }, | |
275 | ], | |
276 | 'RNDC' => [ | |
277 | { action => 'PARAM', proto => 'tcp', dport => '953' }, | |
278 | ], | |
279 | 'Razor' => [ | |
280 | { action => 'ACCEPT', proto => 'tcp', dport => '2703' }, | |
281 | ], | |
282 | 'Rdate' => [ | |
283 | { action => 'PARAM', proto => 'tcp', dport => '37' }, | |
284 | ], | |
285 | 'Rsync' => [ | |
286 | { action => 'PARAM', proto => 'tcp', dport => '873' }, | |
287 | ], | |
288 | 'SANE' => [ | |
289 | { action => 'PARAM', proto => 'tcp', dport => '6566' }, | |
290 | ], | |
291 | 'SMB' => [ | |
292 | { action => 'PARAM', proto => 'udp', dport => '135,445' }, | |
293 | { action => 'PARAM', proto => 'udp', dport => '137:139' }, | |
294 | { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' }, | |
295 | { action => 'PARAM', proto => 'tcp', dport => '135,139,445' }, | |
296 | ], | |
297 | 'SMBBI' => [ | |
298 | { action => 'PARAM', proto => 'udp', dport => '135,445' }, | |
299 | { action => 'PARAM', proto => 'udp', dport => '137:139' }, | |
300 | { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' }, | |
301 | { action => 'PARAM', proto => 'tcp', dport => '135,139,445' }, | |
302 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' }, | |
303 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' }, | |
304 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' }, | |
305 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' }, | |
306 | ], | |
307 | 'SMBswat' => [ | |
308 | { action => 'PARAM', proto => 'tcp', dport => '901' }, | |
309 | ], | |
310 | 'SMTP' => [ | |
311 | { action => 'PARAM', proto => 'tcp', dport => '25' }, | |
312 | ], | |
313 | 'SMTPS' => [ | |
314 | { action => 'PARAM', proto => 'tcp', dport => '465' }, | |
315 | ], | |
316 | 'SNMP' => [ | |
317 | { action => 'PARAM', proto => 'udp', dport => '161:162' }, | |
318 | { action => 'PARAM', proto => 'tcp', dport => '161' }, | |
319 | ], | |
320 | 'SPAMD' => [ | |
321 | { action => 'PARAM', proto => 'tcp', dport => '783' }, | |
322 | ], | |
323 | 'SSH' => [ | |
324 | { action => 'PARAM', proto => 'tcp', dport => '22' }, | |
325 | ], | |
326 | 'SVN' => [ | |
327 | { action => 'PARAM', proto => 'tcp', dport => '3690' }, | |
328 | ], | |
329 | 'SixXS' => [ | |
330 | { action => 'PARAM', proto => 'tcp', dport => '3874' }, | |
331 | { action => 'PARAM', proto => 'udp', dport => '3740' }, | |
332 | { action => 'PARAM', proto => '41' }, | |
333 | { action => 'PARAM', proto => 'udp', dport => '5072,8374' }, | |
334 | ], | |
335 | 'Squid' => [ | |
336 | { action => 'PARAM', proto => 'tcp', dport => '3128' }, | |
337 | ], | |
338 | 'Submission' => [ | |
339 | { action => 'PARAM', proto => 'tcp', dport => '587' }, | |
340 | ], | |
341 | 'Syslog' => [ | |
342 | { action => 'PARAM', proto => 'udp', dport => '514' }, | |
343 | { action => 'PARAM', proto => 'tcp', dport => '514' }, | |
344 | ], | |
345 | 'TFTP' => [ | |
346 | { action => 'PARAM', proto => 'udp', dport => '69' }, | |
347 | ], | |
348 | 'Telnet' => [ | |
349 | { action => 'PARAM', proto => 'tcp', dport => '23' }, | |
350 | ], | |
351 | 'Telnets' => [ | |
352 | { action => 'PARAM', proto => 'tcp', dport => '992' }, | |
353 | ], | |
354 | 'Time' => [ | |
355 | { action => 'PARAM', proto => 'tcp', dport => '37' }, | |
356 | ], | |
357 | 'Trcrt' => [ | |
358 | { action => 'PARAM', proto => 'udp', dport => '33434:33524' }, | |
269d4f13 | 359 | { action => 'PARAM', proto => 'icmp', dport => 'echo-request' }, |
857f62c8 DM |
360 | ], |
361 | 'VNC' => [ | |
362 | { action => 'PARAM', proto => 'tcp', dport => '5900:5909' }, | |
363 | ], | |
364 | 'VNCL' => [ | |
365 | { action => 'PARAM', proto => 'tcp', dport => '5500' }, | |
366 | ], | |
367 | 'Web' => [ | |
368 | { action => 'PARAM', proto => 'tcp', dport => '80' }, | |
961b4928 DM |
369 | { action => 'PARAM', proto => 'tcp', dport => '443' }, |
370 | ], | |
857f62c8 DM |
371 | 'Webcache' => [ |
372 | { action => 'PARAM', proto => 'tcp', dport => '8080' }, | |
373 | ], | |
374 | 'Webmin' => [ | |
375 | { action => 'PARAM', proto => 'tcp', dport => '10000' }, | |
376 | ], | |
377 | 'Whois' => [ | |
378 | { action => 'PARAM', proto => 'tcp', dport => '43' }, | |
379 | ], | |
961b4928 DM |
380 | }; |
381 | ||
382 | my $pve_fw_parsed_macros; | |
383 | my $pve_fw_preferred_macro_names = {}; | |
3a616aa0 | 384 | |
d8f2505e DM |
385 | my $pve_std_chains = { |
386 | 'PVEFW-SET-ACCEPT-MARK' => [ | |
387 | "-j MARK --set-mark 1", | |
388 | ], | |
79929d9c DM |
389 | 'PVEFW-DropBroadcast' => [ |
390 | # same as shorewall 'Broadcast' | |
391 | # simply DROP BROADCAST/MULTICAST/ANYCAST | |
392 | # we can use this to reduce logging | |
393 | { action => 'DROP', dsttype => 'BROADCAST' }, | |
394 | { action => 'DROP', dsttype => 'MULTICAST' }, | |
395 | { action => 'DROP', dsttype => 'ANYCAST' }, | |
396 | { action => 'DROP', dest => '224.0.0.0/4' }, | |
397 | ], | |
398 | 'PVEFW-reject' => [ | |
399 | # same as shorewall 'reject' | |
400 | { action => 'DROP', dsttype => 'BROADCAST' }, | |
401 | { action => 'DROP', source => '224.0.0.0/4' }, | |
402 | { action => 'DROP', proto => 'icmp' }, | |
403 | "-p tcp -j REJECT --reject-with tcp-reset", | |
404 | "-p udp -j REJECT --reject-with icmp-port-unreachable", | |
405 | "-p icmp -j REJECT --reject-with icmp-host-unreachable", | |
406 | "-j REJECT --reject-with icmp-host-prohibited", | |
407 | ], | |
408 | 'PVEFW-Drop' => [ | |
409 | # same as shorewall 'Drop', which is equal to DROP, | |
410 | # but REJECT/DROP some packages to reduce logging, | |
411 | # and ACCEPT critical ICMP types | |
412 | { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth' | |
413 | # we are not interested in BROADCAST/MULTICAST/ANYCAST | |
414 | { action => 'PVEFW-DropBroadcast' }, | |
415 | # ACCEPT critical ICMP types | |
416 | { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' }, | |
417 | { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' }, | |
418 | # Drop packets with INVALID state | |
419 | "-m conntrack --ctstate INVALID -j DROP", | |
420 | # Drop Microsoft SMB noise | |
421 | { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 }, | |
422 | { action => 'DROP', proto => 'udp', dport => '137:139'}, | |
423 | { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 }, | |
424 | { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 }, | |
425 | { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP | |
426 | # Drop new/NotSyn traffic so that it doesn't get logged | |
427 | "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP", | |
428 | # Drop DNS replies | |
429 | { action => 'DROP', proto => 'udp', sport => 53 }, | |
430 | ], | |
431 | 'PVEFW-Reject' => [ | |
432 | # same as shorewall 'Reject', which is equal to Reject, | |
433 | # but REJECT/DROP some packages to reduce logging, | |
434 | # and ACCEPT critical ICMP types | |
435 | { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth' | |
436 | # we are not interested in BROADCAST/MULTICAST/ANYCAST | |
437 | { action => 'PVEFW-DropBroadcast' }, | |
438 | # ACCEPT critical ICMP types | |
439 | { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' }, | |
440 | { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' }, | |
441 | # Drop packets with INVALID state | |
442 | "-m conntrack --ctstate INVALID -j DROP", | |
443 | # Drop Microsoft SMB noise | |
444 | { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 }, | |
445 | { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'}, | |
446 | { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 }, | |
447 | { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 }, | |
448 | { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP | |
449 | # Drop new/NotSyn traffic so that it doesn't get logged | |
450 | "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP", | |
451 | # Drop DNS replies | |
452 | { action => 'DROP', proto => 'udp', sport => 53 }, | |
453 | ], | |
d86659ef DM |
454 | 'PVEFW-tcpflags' => [ |
455 | # same as shorewall tcpflags action. | |
456 | # Packets arriving on this interface are checked for som illegal combinations of TCP flags | |
457 | "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags", | |
458 | "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags", | |
459 | "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags", | |
460 | "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags", | |
461 | "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags", | |
462 | ], | |
bee633ab DM |
463 | 'PVEFW-smurfs' => [ |
464 | # same as shorewall smurfs action | |
465 | # Filter packets for smurfs (packets with a broadcast address as the source). | |
466 | "-s 0.0.0.0/32 -j RETURN", | |
467 | "-m addrtype --src-type BROADCAST -g PVEFW-smurflog", | |
468 | "-s 224.0.0.0/4 -g PVEFW-smurflog", | |
469 | ], | |
d8f2505e DM |
470 | }; |
471 | ||
4b586518 DM |
472 | # iptables -p icmp -h |
473 | my $icmp_type_names = { | |
474 | any => 1, | |
475 | 'echo-reply' => 1, | |
476 | 'destination-unreachable' => 1, | |
477 | 'network-unreachable' => 1, | |
478 | 'host-unreachable' => 1, | |
479 | 'protocol-unreachable' => 1, | |
480 | 'port-unreachable' => 1, | |
481 | 'fragmentation-needed' => 1, | |
482 | 'source-route-failed' => 1, | |
483 | 'network-unknown' => 1, | |
484 | 'host-unknown' => 1, | |
485 | 'network-prohibited' => 1, | |
486 | 'host-prohibited' => 1, | |
487 | 'TOS-network-unreachable' => 1, | |
488 | 'TOS-host-unreachable' => 1, | |
489 | 'communication-prohibited' => 1, | |
490 | 'host-precedence-violation' => 1, | |
491 | 'precedence-cutoff' => 1, | |
492 | 'source-quench' => 1, | |
493 | 'redirect' => 1, | |
494 | 'network-redirect' => 1, | |
495 | 'host-redirect' => 1, | |
496 | 'TOS-network-redirect' => 1, | |
497 | 'TOS-host-redirect' => 1, | |
498 | 'echo-request' => 1, | |
499 | 'router-advertisement' => 1, | |
500 | 'router-solicitation' => 1, | |
501 | 'time-exceeded' => 1, | |
502 | 'ttl-zero-during-transit' => 1, | |
503 | 'ttl-zero-during-reassembly' => 1, | |
504 | 'parameter-problem' => 1, | |
505 | 'ip-header-bad' => 1, | |
506 | 'required-option-missing' => 1, | |
507 | 'timestamp-request' => 1, | |
508 | 'timestamp-reply' => 1, | |
509 | 'address-mask-request' => 1, | |
510 | 'address-mask-reply' => 1, | |
511 | }; | |
512 | ||
a332200b | 513 | sub get_firewall_macros { |
9aab3127 | 514 | |
961b4928 | 515 | return $pve_fw_parsed_macros if $pve_fw_parsed_macros; |
6158271d | 516 | |
961b4928 | 517 | $pve_fw_parsed_macros = {}; |
9aab3127 | 518 | |
961b4928 DM |
519 | foreach my $k (keys %$pve_fw_macros) { |
520 | my $name = lc($k); | |
a332200b | 521 | |
961b4928 DM |
522 | my $macro = $pve_fw_macros->{$k}; |
523 | $pve_fw_preferred_macro_names->{$name} = $k; | |
524 | $pve_fw_parsed_macros->{$name} = $macro; | |
525 | } | |
a332200b | 526 | |
961b4928 | 527 | return $pve_fw_parsed_macros; |
9aab3127 DM |
528 | } |
529 | ||
fcba0beb DM |
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; | |
35b66e9d | 553 | $services->{byid}->{$2}->{port} = $2; |
fcba0beb DM |
554 | $services->{byid}->{$2}->{$3} = 1; |
555 | $services->{byname}->{$1} = $services->{byid}->{$2}; | |
556 | } | |
557 | } | |
558 | ||
559 | close($fh); | |
560 | ||
6158271d DM |
561 | $etc_services = $services; |
562 | ||
3a616aa0 | 563 | |
fcba0beb DM |
564 | return $etc_services; |
565 | } | |
566 | ||
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 $etc_protocols; | |
598 | } | |
599 | ||
ecbea048 DM |
600 | sub parse_address_list { |
601 | my ($str) = @_; | |
602 | ||
d6de1dc2 | 603 | my $nbaor = 0; |
ecbea048 DM |
604 | foreach my $aor (split(/,/, $str)) { |
605 | if (!Net::IP->new($aor)) { | |
606 | my $err = Net::IP::Error(); | |
607 | die "invalid IP address: $err\n"; | |
d6de1dc2 AD |
608 | }else{ |
609 | $nbaor++; | |
ecbea048 DM |
610 | } |
611 | } | |
d6de1dc2 | 612 | return $nbaor; |
ecbea048 | 613 | } |
dddd9413 | 614 | |
fcba0beb DM |
615 | sub parse_port_name_number_or_range { |
616 | my ($str) = @_; | |
617 | ||
618 | my $services = PVE::Firewall::get_etc_services(); | |
4cdbb3b7 | 619 | my $nbports = 0; |
fcba0beb | 620 | foreach my $item (split(/,/, $str)) { |
4cdbb3b7 | 621 | my $portlist = ""; |
35b66e9d | 622 | my $oldpon = undef; |
4b586518 | 623 | $nbports++; |
fcba0beb | 624 | foreach my $pon (split(':', $item, 2)) { |
35b66e9d | 625 | $pon = $services->{byname}->{$pon}->{port} if $services->{byname}->{$pon}->{port}; |
4cdbb3b7 | 626 | if ($pon =~ m/^\d+$/){ |
857f62c8 | 627 | die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535; |
35b66e9d AD |
628 | die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon); |
629 | $oldpon = $pon; | |
4cdbb3b7 AD |
630 | }else{ |
631 | die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon}; | |
632 | } | |
fcba0beb DM |
633 | } |
634 | } | |
635 | ||
4cdbb3b7 | 636 | return ($nbports); |
fcba0beb DM |
637 | } |
638 | ||
d1c53b3e DM |
639 | # helper function for API |
640 | sub cleanup_fw_rule { | |
641 | my ($rule, $digest, $pos) = @_; | |
642 | ||
643 | my $r = {}; | |
644 | ||
645 | foreach my $k (keys %$rule) { | |
646 | next if $k eq 'nbdport'; | |
647 | next if $k eq 'nbsport'; | |
648 | my $v = $rule->{$k}; | |
649 | next if !defined($v); | |
650 | $r->{$k} = $v; | |
651 | $r->{digest} = $digest; | |
652 | $r->{pos} = $pos; | |
653 | } | |
654 | ||
655 | return $r; | |
656 | } | |
657 | ||
780bcc0f DM |
658 | my $bridge_firewall_enabled = 0; |
659 | ||
660 | sub enable_bridge_firewall { | |
661 | ||
662 | return if $bridge_firewall_enabled; # only once | |
663 | ||
5f0a912c DM |
664 | PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1"); |
665 | PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1"); | |
780bcc0f | 666 | |
6a8a75db DM |
667 | # make sure syncookies are enabled (which is default on newer 3.X kernels anyways) |
668 | PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1"); | |
669 | ||
780bcc0f DM |
670 | $bridge_firewall_enabled = 1; |
671 | } | |
672 | ||
8cebfa6f | 673 | my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n"; |
dddd9413 | 674 | |
3a616aa0 AD |
675 | sub iptables { |
676 | my ($cmd) = @_; | |
677 | ||
678 | run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {}); | |
679 | } | |
680 | ||
b16e818e DM |
681 | sub iptables_restore_cmdlist { |
682 | my ($cmdlist) = @_; | |
3a616aa0 | 683 | |
3fa83edf | 684 | run_command("/sbin/iptables-restore -n", input => $cmdlist); |
3a616aa0 AD |
685 | } |
686 | ||
de2a57cd DM |
687 | sub iptables_get_chains { |
688 | ||
689 | my $res = {}; | |
690 | ||
691 | # check what chains we want to track | |
692 | my $is_pvefw_chain = sub { | |
693 | my $name = shift; | |
694 | ||
dec84fcd DM |
695 | return 1 if $name =~ m/^PVEFW-\S+$/; |
696 | ||
de2a57cd | 697 | return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/; |
954f24b1 DM |
698 | |
699 | return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable | |
700 | ||
9e15114a DM |
701 | return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/; |
702 | ||
5927497d | 703 | return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT)$/; |
f50656c2 | 704 | return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/; |
de2a57cd DM |
705 | |
706 | return undef; | |
707 | }; | |
708 | ||
709 | my $table = ''; | |
710 | ||
de2a57cd DM |
711 | my $parser = sub { |
712 | my $line = shift; | |
713 | ||
714 | return if $line =~ m/^#/; | |
715 | return if $line =~ m/^\s*$/; | |
716 | ||
717 | if ($line =~ m/^\*(\S+)$/) { | |
718 | $table = $1; | |
719 | return; | |
720 | } | |
721 | ||
722 | return if $table ne 'filter'; | |
723 | ||
724 | if ($line =~ m/^:(\S+)\s/) { | |
725 | my $chain = $1; | |
726 | return if !&$is_pvefw_chain($chain); | |
3fa83edf | 727 | $res->{$chain} = "unknown"; |
09d5f68e | 728 | } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) { |
3fa83edf | 729 | my ($chain, $sig) = ($1, $2); |
de2a57cd | 730 | return if !&$is_pvefw_chain($chain); |
3fa83edf | 731 | $res->{$chain} = $sig; |
de2a57cd DM |
732 | } else { |
733 | # simply ignore the rest | |
734 | return; | |
735 | } | |
736 | }; | |
737 | ||
738 | run_command("/sbin/iptables-save", outfunc => $parser); | |
739 | ||
de2a57cd DM |
740 | return $res; |
741 | } | |
742 | ||
3a616aa0 AD |
743 | sub iptables_chain_exist { |
744 | my ($chain) = @_; | |
745 | ||
746 | eval{ | |
747 | iptables("-n --list $chain"); | |
748 | }; | |
749 | return undef if $@; | |
750 | ||
751 | return 1; | |
752 | } | |
753 | ||
754 | sub iptables_rule_exist { | |
755 | my ($rule) = @_; | |
756 | ||
757 | eval{ | |
758 | iptables("-C $rule"); | |
759 | }; | |
760 | return undef if $@; | |
761 | ||
762 | return 1; | |
763 | } | |
764 | ||
eba0fb64 | 765 | sub ruleset_generate_cmdstr { |
2f906466 | 766 | my ($ruleset, $chain, $rule, $actions, $goto) = @_; |
3a616aa0 | 767 | |
00bb4391 | 768 | return if defined($rule->{enable}) && !$rule->{enable}; |
11bac5c2 | 769 | |
41524a58 | 770 | my @cmd = (); |
3a616aa0 | 771 | |
eba0fb64 DM |
772 | push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in}; |
773 | push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out}; | |
774 | ||
41524a58 DM |
775 | push @cmd, "-m iprange --src-range" if $rule->{nbsource} && $rule->{nbsource} > 1; |
776 | push @cmd, "-s $rule->{source}" if $rule->{source}; | |
777 | push @cmd, "-m iprange --dst-range" if $rule->{nbdest} && $rule->{nbdest} > 1; | |
778 | push @cmd, "-d $rule->{dest}" if $rule->{dest}; | |
4b586518 | 779 | |
181390b0 | 780 | if ($rule->{proto}) { |
41524a58 | 781 | push @cmd, "-p $rule->{proto}"; |
e3a1d391 | 782 | |
181390b0 DM |
783 | my $multiport = 0; |
784 | $multiport++ if $rule->{nbdport} && ($rule->{nbdport} > 1); | |
785 | $multiport++ if $rule->{nbsport} && ($rule->{nbsport} > 1); | |
e3a1d391 | 786 | |
41524a58 | 787 | push @cmd, "--match multiport" if $multiport; |
4b586518 | 788 | |
181390b0 DM |
789 | die "multiport: option '--sports' cannot be used together with '--dports'\n" |
790 | if ($multiport == 2) && ($rule->{dport} ne $rule->{sport}); | |
791 | ||
792 | if ($rule->{dport}) { | |
793 | if ($rule->{proto} && $rule->{proto} eq 'icmp') { | |
794 | # Note: we use dport to store --icmp-type | |
795 | die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}}); | |
41524a58 | 796 | push @cmd, "-m icmp --icmp-type $rule->{dport}"; |
181390b0 DM |
797 | } else { |
798 | if ($rule->{nbdport} && $rule->{nbdport} > 1) { | |
799 | if ($multiport == 2) { | |
41524a58 | 800 | push @cmd, "--ports $rule->{dport}"; |
181390b0 | 801 | } else { |
41524a58 | 802 | push @cmd, "--dports $rule->{dport}"; |
181390b0 | 803 | } |
e3a1d391 | 804 | } else { |
41524a58 | 805 | push @cmd, "--dport $rule->{dport}"; |
e3a1d391 | 806 | } |
4b586518 DM |
807 | } |
808 | } | |
4b586518 | 809 | |
181390b0 DM |
810 | if ($rule->{sport}) { |
811 | if ($rule->{nbsport} && $rule->{nbsport} > 1) { | |
41524a58 | 812 | push @cmd, "--sports $rule->{sport}" if $multiport != 2; |
181390b0 | 813 | } else { |
41524a58 | 814 | push @cmd, "--sport $rule->{sport}"; |
181390b0 | 815 | } |
4b586518 | 816 | } |
181390b0 DM |
817 | } elsif ($rule->{dport} || $rule->{sport}) { |
818 | warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport}; | |
819 | warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport}; | |
4b586518 DM |
820 | } |
821 | ||
41524a58 | 822 | push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype}; |
4e6112f9 DM |
823 | |
824 | if (my $action = $rule->{action}) { | |
2f906466 | 825 | $action = $actions->{$action} if defined($actions->{$action}); |
4e6112f9 | 826 | $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK'; |
41524a58 | 827 | push @cmd, $goto ? "-g $action" : "-j $action"; |
181390b0 | 828 | } |
3a616aa0 | 829 | |
eba0fb64 DM |
830 | return scalar(@cmd) ? join(' ', @cmd) : undef; |
831 | } | |
832 | ||
833 | sub ruleset_generate_rule { | |
834 | my ($ruleset, $chain, $rule, $actions, $goto) = @_; | |
835 | ||
836 | if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) { | |
41524a58 DM |
837 | ruleset_addrule($ruleset, $chain, $cmdstr); |
838 | } | |
3fa83edf | 839 | } |
eba0fb64 DM |
840 | sub ruleset_generate_rule_insert { |
841 | my ($ruleset, $chain, $rule, $actions, $goto) = @_; | |
842 | ||
843 | if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) { | |
844 | ruleset_insertrule($ruleset, $chain, $cmdstr); | |
845 | } | |
846 | } | |
3fa83edf DM |
847 | |
848 | sub ruleset_create_chain { | |
849 | my ($ruleset, $chain) = @_; | |
3a616aa0 | 850 | |
d050c724 | 851 | die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28; |
782c4cde | 852 | die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format |
d050c724 | 853 | |
3fa83edf DM |
854 | die "chain '$chain' already exists\n" if $ruleset->{$chain}; |
855 | ||
856 | $ruleset->{$chain} = []; | |
3a616aa0 AD |
857 | } |
858 | ||
3fa83edf DM |
859 | sub ruleset_chain_exist { |
860 | my ($ruleset, $chain) = @_; | |
3a616aa0 | 861 | |
3fa83edf DM |
862 | return $ruleset->{$chain} ? 1 : undef; |
863 | } | |
3a616aa0 | 864 | |
3fa83edf DM |
865 | sub ruleset_addrule { |
866 | my ($ruleset, $chain, $rule) = @_; | |
3a616aa0 | 867 | |
3fa83edf | 868 | die "no such chain '$chain'\n" if !$ruleset->{$chain}; |
3a616aa0 | 869 | |
3fa83edf DM |
870 | push @{$ruleset->{$chain}}, "-A $chain $rule"; |
871 | } | |
3a616aa0 | 872 | |
3fa83edf DM |
873 | sub ruleset_insertrule { |
874 | my ($ruleset, $chain, $rule) = @_; | |
3a616aa0 | 875 | |
3fa83edf | 876 | die "no such chain '$chain'\n" if !$ruleset->{$chain}; |
3a616aa0 | 877 | |
3fa83edf DM |
878 | unshift @{$ruleset->{$chain}}, "-A $chain $rule"; |
879 | } | |
3a616aa0 | 880 | |
782c4cde DM |
881 | sub get_log_rule_base { |
882 | my ($chain, $vmid, $msg, $loglevel) = @_; | |
883 | ||
884 | die "internal error - no log level" if !defined($loglevel); | |
885 | ||
886 | $vmid = 0 if !defined($vmid); | |
887 | ||
888 | # Note: we use special format for prefix to pass further | |
889 | # info to log daemon (VMID, LOGVELEL and CHAIN) | |
890 | ||
891 | return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\""; | |
892 | } | |
893 | ||
894 | sub ruleset_addlog { | |
895 | my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_; | |
896 | ||
897 | return if !defined($loglevel); | |
898 | ||
899 | my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel); | |
900 | ||
901 | $logrule = "$rule $logrule" if defined($rule); | |
902 | ||
903 | ruleset_addrule($ruleset, $chain, $logrule) | |
904 | } | |
905 | ||
3fa83edf | 906 | sub generate_bridge_chains { |
530c005e DM |
907 | my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_; |
908 | ||
909 | my $options = $hostfw_conf->{options} || {}; | |
910 | ||
911 | die "error: detected direct route to bridge '$bridge'\n" | |
912 | if !$options->{allow_bridge_route} && $routing_table->{$bridge}; | |
2f3d8d76 | 913 | |
5927497d DM |
914 | if (!ruleset_chain_exist($ruleset, "$bridge-FW")) { |
915 | ruleset_create_chain($ruleset, "$bridge-FW"); | |
3cc81077 DM |
916 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-out -j $bridge-FW"); |
917 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-in -j $bridge-FW"); | |
3fa83edf | 918 | } |
3a616aa0 | 919 | |
3fa83edf DM |
920 | if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) { |
921 | ruleset_create_chain($ruleset, "$bridge-OUT"); | |
3cc81077 DM |
922 | ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-in -j $bridge-OUT"); |
923 | ruleset_insertrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-in -j $bridge-OUT"); | |
9fcad984 AD |
924 | } |
925 | ||
926 | if (!ruleset_chain_exist($ruleset, "$bridge-IN")) { | |
927 | ruleset_create_chain($ruleset, "$bridge-IN"); | |
3cc81077 | 928 | ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j $bridge-IN"); |
fdb0bf20 | 929 | ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT"); |
7323008d | 930 | # accept traffic to unmanaged bridge ports |
3cc81077 | 931 | ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j ACCEPT "); |
3fa83edf DM |
932 | } |
933 | } | |
3a616aa0 | 934 | |
ead850e8 | 935 | sub ruleset_add_chain_policy { |
782c4cde | 936 | my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_; |
ead850e8 DM |
937 | |
938 | if ($policy eq 'ACCEPT') { | |
939 | ||
940 | ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' }, | |
941 | { ACCEPT => $accept_action}); | |
942 | ||
943 | } elsif ($policy eq 'DROP') { | |
944 | ||
945 | ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop"); | |
946 | ||
782c4cde | 947 | ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel); |
ead850e8 DM |
948 | |
949 | ruleset_addrule($ruleset, $chain, "-j DROP"); | |
950 | } elsif ($policy eq 'REJECT') { | |
951 | ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject"); | |
952 | ||
782c4cde | 953 | ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel); |
ead850e8 DM |
954 | |
955 | ruleset_addrule($ruleset, $chain, "-g PVEFW-reject"); | |
956 | } else { | |
957 | # should not happen | |
958 | die "internal error: unknown policy '$policy'"; | |
959 | } | |
960 | } | |
961 | ||
9e15114a DM |
962 | sub ruleset_create_vm_chain { |
963 | my ($ruleset, $chain, $options, $macaddr, $direction) = @_; | |
3a616aa0 | 964 | |
9e15114a | 965 | ruleset_create_chain($ruleset, $chain); |
3a616aa0 | 966 | |
bee633ab | 967 | if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) { |
9e15114a | 968 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs"); |
bee633ab DM |
969 | } |
970 | ||
ce15d90b | 971 | if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) { |
76a2d1e7 | 972 | if ($direction eq 'OUT') { |
9f00894a | 973 | ruleset_addrule($ruleset, $chain, "-p udp -m udp --sport 68 --dport 67 -g PVEFW-SET-ACCEPT-MARK"); |
76a2d1e7 DM |
974 | } else { |
975 | ruleset_addrule($ruleset, $chain, "-p udp -m udp --sport 67 --dport 68 -j ACCEPT"); | |
976 | } | |
ce15d90b DM |
977 | } |
978 | ||
bee633ab | 979 | if ($options->{tcpflags}) { |
9e15114a | 980 | ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags"); |
bee633ab DM |
981 | } |
982 | ||
9e15114a DM |
983 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP"); |
984 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT"); | |
3a616aa0 | 985 | |
b21aca2c DM |
986 | if ($direction eq 'OUT') { |
987 | if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) { | |
9e15114a | 988 | ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP"); |
b21aca2c | 989 | } |
9e15114a | 990 | ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark |
c29f55c9 | 991 | } |
9e15114a DM |
992 | } |
993 | ||
994 | sub ruleset_generate_vm_rules { | |
995 | my ($ruleset, $rules, $groups_conf, $chain, $netid, $direction) = @_; | |
996 | ||
997 | my $lc_direction = lc($direction); | |
c29f55c9 | 998 | |
92e976b3 DM |
999 | foreach my $rule (@$rules) { |
1000 | next if $rule->{iface} && $rule->{iface} ne $netid; | |
ea9e5116 | 1001 | next if !$rule->{enable}; |
92e976b3 DM |
1002 | if ($rule->{type} eq 'group') { |
1003 | my $group_chain = "GROUP-$rule->{action}-$direction"; | |
1004 | if(!ruleset_chain_exist($ruleset, $group_chain)){ | |
1005 | generate_group_rules($ruleset, $groups_conf, $rule->{action}); | |
1006 | } | |
9e15114a DM |
1007 | ruleset_addrule($ruleset, $chain, "-j $group_chain"); |
1008 | ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j RETURN") | |
92e976b3 DM |
1009 | if $direction eq 'OUT'; |
1010 | } else { | |
1011 | next if $rule->{type} ne $lc_direction; | |
1012 | if ($direction eq 'OUT') { | |
9e15114a | 1013 | ruleset_generate_rule($ruleset, $chain, $rule, |
92e976b3 | 1014 | { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }); |
4e6112f9 | 1015 | } else { |
9e15114a | 1016 | ruleset_generate_rule($ruleset, $chain, $rule, { REJECT => "PVEFW-reject" }); |
3a616aa0 | 1017 | } |
4e6112f9 | 1018 | } |
3a616aa0 | 1019 | } |
9e15114a DM |
1020 | } |
1021 | ||
1022 | sub generate_venet_rules_direction { | |
1023 | my ($ruleset, $groups_conf, $vmfw_conf, $vmid, $ip, $direction) = @_; | |
1024 | ||
5176619e | 1025 | parse_address_list($ip); # make sure we have a valid $ip list |
9e15114a DM |
1026 | |
1027 | my $lc_direction = lc($direction); | |
1028 | ||
1029 | my $rules = $vmfw_conf->{rules}; | |
1030 | ||
1031 | my $options = $vmfw_conf->{options}; | |
1032 | my $loglevel = get_option_log_level($options, "log_level_${lc_direction}"); | |
1033 | ||
1034 | my $chain = "venet0-$vmid-$direction"; | |
1035 | ||
1036 | ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction); | |
1037 | ||
1038 | ruleset_generate_vm_rules($ruleset, $rules, $groups_conf, $chain, 'venet', $direction); | |
1039 | ||
1040 | # implement policy | |
1041 | my $policy; | |
1042 | ||
1043 | if ($direction eq 'OUT') { | |
1044 | $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default | |
1045 | } else { | |
1046 | $policy = $options->{policy_in} || 'DROP'; # allow nothing by default | |
1047 | } | |
1048 | ||
1049 | my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : "ACCEPT"; | |
782c4cde | 1050 | ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action); |
9e15114a | 1051 | |
38485daa | 1052 | # plug into FORWARD, INPUT and OUTPUT chain |
eba0fb64 DM |
1053 | if ($direction eq 'OUT') { |
1054 | ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD", { | |
1055 | action => $chain, | |
1056 | source => $ip, | |
1057 | iface_in => 'venet0'}); | |
38485daa DM |
1058 | |
1059 | ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT", { | |
1060 | action => $chain, | |
1061 | source => $ip, | |
1062 | iface_in => 'venet0'}); | |
eba0fb64 DM |
1063 | } else { |
1064 | ruleset_generate_rule($ruleset, "PVEFW-FORWARD", { | |
1065 | action => $chain, | |
1066 | dest => $ip, | |
1067 | iface_out => 'venet0'}); | |
38485daa DM |
1068 | |
1069 | ruleset_generate_rule($ruleset, "PVEFW-OUTPUT", { | |
1070 | action => $chain, | |
1071 | dest => $ip, | |
1072 | iface_out => 'venet0'}); | |
eba0fb64 | 1073 | } |
9e15114a DM |
1074 | } |
1075 | ||
1076 | sub generate_tap_rules_direction { | |
782c4cde | 1077 | my ($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_; |
9e15114a DM |
1078 | |
1079 | my $lc_direction = lc($direction); | |
1080 | ||
1081 | my $rules = $vmfw_conf->{rules}; | |
1082 | ||
1083 | my $options = $vmfw_conf->{options}; | |
1084 | my $loglevel = get_option_log_level($options, "log_level_${lc_direction}"); | |
1085 | ||
1086 | my $tapchain = "$iface-$direction"; | |
1087 | ||
1088 | ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction); | |
1089 | ||
1090 | ruleset_generate_vm_rules($ruleset, $rules, $groups_conf, $tapchain, $netid, $direction); | |
3a616aa0 | 1091 | |
ccae0b50 DM |
1092 | # implement policy |
1093 | my $policy; | |
1094 | ||
1095 | if ($direction eq 'OUT') { | |
72f63fde | 1096 | $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default |
ccae0b50 | 1097 | } else { |
72f63fde | 1098 | $policy = $options->{policy_in} || 'DROP'; # allow nothing by default |
ccae0b50 DM |
1099 | } |
1100 | ||
ead850e8 | 1101 | my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : "ACCEPT"; |
782c4cde | 1102 | ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action); |
3a616aa0 | 1103 | |
3fa83edf | 1104 | # plug the tap chain to bridge chain |
3cc81077 DM |
1105 | if ($direction eq 'IN') { |
1106 | ruleset_insertrule($ruleset, "$bridge-IN", | |
1107 | "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain"); | |
1108 | } else { | |
1109 | ruleset_insertrule($ruleset, "$bridge-OUT", | |
1110 | "-m physdev --physdev-in $iface -j $tapchain"); | |
1111 | } | |
3a616aa0 AD |
1112 | } |
1113 | ||
d18c1e2b | 1114 | sub enable_host_firewall { |
92e976b3 | 1115 | my ($ruleset, $hostfw_conf, $groups_conf) = @_; |
0bd5f137 | 1116 | |
51bae274 | 1117 | # fixme: allow security groups |
0bd5f137 | 1118 | |
92e976b3 DM |
1119 | my $options = $hostfw_conf->{options}; |
1120 | my $rules = $hostfw_conf->{rules}; | |
178a63be | 1121 | |
3fa83edf | 1122 | # host inbound firewall |
dec84fcd DM |
1123 | my $chain = "PVEFW-HOST-IN"; |
1124 | ruleset_create_chain($ruleset, $chain); | |
0bd5f137 | 1125 | |
178a63be DM |
1126 | my $loglevel = get_option_log_level($options, "log_level_in"); |
1127 | ||
4ac863a6 DM |
1128 | if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) { |
1129 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs"); | |
1130 | } | |
1131 | ||
fb424a00 DM |
1132 | if ($options->{tcpflags}) { |
1133 | ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags"); | |
1134 | } | |
1135 | ||
7fab95bc DM |
1136 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP"); |
1137 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT"); | |
dec84fcd DM |
1138 | ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT"); |
1139 | ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT"); | |
97156ecc | 1140 | ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT"); |
dec84fcd | 1141 | ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync |
0bd5f137 | 1142 | |
23e888f8 DM |
1143 | # we use RETURN because we need to check also tap rules |
1144 | my $accept_action = 'RETURN'; | |
1145 | ||
92e976b3 DM |
1146 | foreach my $rule (@$rules) { |
1147 | next if $rule->{type} ne 'in'; | |
23e888f8 | 1148 | ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }); |
0bd5f137 AD |
1149 | } |
1150 | ||
23e888f8 | 1151 | # implement input policy |
72f63fde | 1152 | my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default |
782c4cde | 1153 | ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action); |
0bd5f137 | 1154 | |
3fa83edf | 1155 | # host outbound firewall |
aadd745e | 1156 | $chain = "PVEFW-HOST-OUT"; |
dec84fcd DM |
1157 | ruleset_create_chain($ruleset, $chain); |
1158 | ||
178a63be DM |
1159 | $loglevel = get_option_log_level($options, "log_level_out"); |
1160 | ||
7fab95bc DM |
1161 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP"); |
1162 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT"); | |
dec84fcd DM |
1163 | ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT"); |
1164 | ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT"); | |
97156ecc | 1165 | ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT"); |
dec84fcd | 1166 | ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync |
0bd5f137 | 1167 | |
23e888f8 DM |
1168 | # we use RETURN because we may want to check other thigs later |
1169 | $accept_action = 'RETURN'; | |
1170 | ||
92e976b3 DM |
1171 | foreach my $rule (@$rules) { |
1172 | next if $rule->{type} ne 'out'; | |
23e888f8 | 1173 | ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }); |
0bd5f137 AD |
1174 | } |
1175 | ||
23e888f8 | 1176 | # implement output policy |
72f63fde | 1177 | $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default |
782c4cde | 1178 | ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action); |
6158271d | 1179 | |
dec84fcd DM |
1180 | ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT"); |
1181 | ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN"); | |
9d31b418 AD |
1182 | } |
1183 | ||
1184 | sub generate_group_rules { | |
92e976b3 | 1185 | my ($ruleset, $groups_conf, $group) = @_; |
ac7648e0 | 1186 | die "no such security group '$group'\n" if !$groups_conf->{rules}->{$group}; |
9d31b418 | 1187 | |
8f119284 | 1188 | my $rules = $groups_conf->{rules}->{$group}; |
6158271d | 1189 | |
3fa83edf | 1190 | my $chain = "GROUP-${group}-IN"; |
9d31b418 | 1191 | |
3fa83edf | 1192 | ruleset_create_chain($ruleset, $chain); |
9d31b418 | 1193 | |
92e976b3 DM |
1194 | foreach my $rule (@$rules) { |
1195 | next if $rule->{type} ne 'in'; | |
1196 | ruleset_generate_rule($ruleset, $chain, $rule, { REJECT => "PVEFW-reject" }); | |
9d31b418 AD |
1197 | } |
1198 | ||
3fa83edf | 1199 | $chain = "GROUP-${group}-OUT"; |
9d31b418 | 1200 | |
3fa83edf | 1201 | ruleset_create_chain($ruleset, $chain); |
4e6112f9 | 1202 | ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark |
9d31b418 | 1203 | |
92e976b3 DM |
1204 | foreach my $rule (@$rules) { |
1205 | next if $rule->{type} ne 'out'; | |
1206 | # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to | |
1207 | # check also other tap rules later | |
1208 | ruleset_generate_rule($ruleset, $chain, $rule, | |
1209 | { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }); | |
9d31b418 | 1210 | } |
9d31b418 AD |
1211 | } |
1212 | ||
51bae274 DM |
1213 | my $MAX_NETS = 32; |
1214 | my $valid_netdev_names = {}; | |
1215 | for (my $i = 0; $i < $MAX_NETS; $i++) { | |
1216 | $valid_netdev_names->{"net$i"} = 1; | |
1217 | } | |
5e1267a5 | 1218 | |
51bae274 DM |
1219 | sub parse_fw_rule { |
1220 | my ($line, $need_iface, $allow_groups) = @_; | |
5e1267a5 | 1221 | |
a332200b | 1222 | my $macros = get_firewall_macros(); |
fcba0beb | 1223 | my $protocols = get_etc_protocols(); |
51bae274 | 1224 | |
92e976b3 | 1225 | my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport); |
51bae274 | 1226 | |
11bac5c2 | 1227 | # we can add single line comments to the end of the rule |
30c1ae52 | 1228 | my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//; |
11bac5c2 DM |
1229 | |
1230 | # we can disable a rule when prefixed with '|' | |
ea9e5116 DM |
1231 | my $enable = 1; |
1232 | ||
1233 | $enable = 0 if $line =~ s/^\|//; | |
51bae274 DM |
1234 | |
1235 | my @data = split(/\s+/, $line); | |
92e976b3 | 1236 | my $expected_elements = $need_iface ? 8 : 7; |
51bae274 DM |
1237 | |
1238 | die "wrong number of rule elements\n" if scalar(@data) > $expected_elements; | |
1239 | ||
1240 | if ($need_iface) { | |
92e976b3 | 1241 | ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data |
51bae274 | 1242 | } else { |
92e976b3 | 1243 | ($type, $action, $source, $dest, $proto, $dport, $sport) = @data; |
51bae274 DM |
1244 | } |
1245 | ||
92e976b3 | 1246 | die "incomplete rule\n" if ! ($type && $action); |
51bae274 | 1247 | |
961b4928 DM |
1248 | my $macro; |
1249 | my $macro_name; | |
1250 | ||
92e976b3 DM |
1251 | $type = lc($type); |
1252 | ||
1253 | if ($type eq 'in' || $type eq 'out') { | |
1254 | if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) { | |
1255 | # OK | |
1256 | } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) { | |
1257 | ($macro_name, $action) = ($1, $2); | |
1258 | my $lc_macro_name = lc($macro_name); | |
1259 | my $preferred_name = $pve_fw_preferred_macro_names->{$lc_macro_name}; | |
1260 | $macro_name = $preferred_name if $preferred_name; | |
1261 | $macro = $macros->{$lc_macro_name}; | |
1262 | die "unknown macro '$macro_name'\n" if !$macro; | |
1263 | } else { | |
1264 | die "unknown action '$action'\n"; | |
1265 | } | |
1266 | } elsif ($type eq 'group') { | |
1267 | die "wrong number of rule elements\n" if scalar(@data) != 3; | |
1268 | die "groups disabled\n" if !$allow_groups; | |
1269 | ||
1270 | die "invalid characters in group name\n" if $action !~ m/^[A-Za-z0-9_\-]+$/; | |
51bae274 | 1271 | } else { |
92e976b3 | 1272 | die "unknown rule type '$type'\n"; |
51bae274 DM |
1273 | } |
1274 | ||
1275 | if ($need_iface) { | |
1276 | $iface = undef if $iface && $iface eq '-'; | |
51bae274 DM |
1277 | } |
1278 | ||
1279 | $proto = undef if $proto && $proto eq '-'; | |
6158271d | 1280 | die "unknown protokol '$proto'\n" if $proto && |
51bae274 DM |
1281 | !(defined($protocols->{byname}->{$proto}) || |
1282 | defined($protocols->{byid}->{$proto})); | |
1283 | ||
1284 | $source = undef if $source && $source eq '-'; | |
1285 | $dest = undef if $dest && $dest eq '-'; | |
1286 | ||
1287 | $dport = undef if $dport && $dport eq '-'; | |
1288 | $sport = undef if $sport && $sport eq '-'; | |
1289 | ||
51bae274 DM |
1290 | my $nbsource = undef; |
1291 | my $nbdest = undef; | |
1292 | ||
1293 | $nbsource = parse_address_list($source) if $source; | |
1294 | $nbdest = parse_address_list($dest) if $dest; | |
6158271d | 1295 | |
961b4928 | 1296 | my $rules = []; |
51bae274 | 1297 | |
961b4928 | 1298 | my $param = { |
92e976b3 | 1299 | type => $type, |
ea9e5116 | 1300 | enable => $enable, |
11bac5c2 | 1301 | comment => $comment, |
51bae274 | 1302 | action => $action, |
51bae274 DM |
1303 | iface => $iface, |
1304 | source => $source, | |
1305 | dest => $dest, | |
1306 | nbsource => $nbsource, | |
1307 | nbdest => $nbdest, | |
1308 | proto => $proto, | |
1309 | dport => $dport, | |
1310 | sport => $sport, | |
51bae274 | 1311 | }; |
961b4928 DM |
1312 | |
1313 | if ($macro) { | |
1314 | foreach my $templ (@$macro) { | |
1315 | my $rule = {}; | |
faf7be7e | 1316 | my $param_used = {}; |
961b4928 DM |
1317 | foreach my $k (keys %$templ) { |
1318 | my $v = $templ->{$k}; | |
857f62c8 DM |
1319 | if ($v eq 'PARAM') { |
1320 | $v = $param->{$k}; | |
faf7be7e | 1321 | $param_used->{$k} = 1; |
857f62c8 DM |
1322 | } elsif ($v eq 'DEST') { |
1323 | $v = $param->{dest}; | |
faf7be7e | 1324 | $param_used->{dest} = 1; |
857f62c8 DM |
1325 | } elsif ($v eq 'SOURCE') { |
1326 | $v = $param->{source}; | |
faf7be7e | 1327 | $param_used->{source} = 1; |
857f62c8 DM |
1328 | } |
1329 | ||
961b4928 DM |
1330 | die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v); |
1331 | $rule->{$k} = $v; | |
1332 | } | |
faf7be7e DM |
1333 | foreach my $k (keys %$param) { |
1334 | next if !defined($param->{$k}); | |
1335 | next if $param_used->{$k}; | |
1336 | if (defined($rule->{$k})) { | |
1337 | die "parameter '$k' already define in macro (value = '$rule->{$k}')\n" | |
1338 | if $rule->{$k} ne $param->{$k}; | |
1339 | } else { | |
1340 | $rule->{$k} = $param->{$k}; | |
1341 | } | |
1342 | } | |
961b4928 DM |
1343 | push @$rules, $rule; |
1344 | } | |
1345 | } else { | |
1346 | push @$rules, $param; | |
1347 | } | |
1348 | ||
1349 | foreach my $rule (@$rules) { | |
6158271d | 1350 | $rule->{nbdport} = parse_port_name_number_or_range($rule->{dport}) |
961b4928 | 1351 | if defined($rule->{dport}); |
6158271d | 1352 | $rule->{nbsport} = parse_port_name_number_or_range($rule->{sport}) |
961b4928 DM |
1353 | if defined($rule->{sport}); |
1354 | } | |
1355 | ||
1356 | return $rules; | |
51bae274 DM |
1357 | } |
1358 | ||
2d404ffc | 1359 | sub parse_vmfw_option { |
85c6eaed DM |
1360 | my ($line) = @_; |
1361 | ||
1362 | my ($opt, $value); | |
1363 | ||
178a63be DM |
1364 | my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog"; |
1365 | ||
ce15d90b | 1366 | if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags):\s*(0|1)\s*$/i) { |
9c6b6efd DM |
1367 | $opt = lc($1); |
1368 | $value = int($2); | |
178a63be DM |
1369 | } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) { |
1370 | $opt = lc($1); | |
1371 | $value = $2 ? lc($3) : ''; | |
72f63fde | 1372 | } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) { |
85c6eaed DM |
1373 | $opt = lc($1); |
1374 | $value = uc($3); | |
9c6b6efd | 1375 | } else { |
85c6eaed DM |
1376 | chomp $line; |
1377 | die "can't parse option '$line'\n" | |
1378 | } | |
1379 | ||
1380 | return ($opt, $value); | |
1381 | } | |
1382 | ||
2d404ffc DM |
1383 | sub parse_hostfw_option { |
1384 | my ($line) = @_; | |
1385 | ||
1386 | my ($opt, $value); | |
1387 | ||
1388 | my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog"; | |
1389 | ||
530c005e | 1390 | if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags|allow_bridge_route):\s*(0|1)\s*$/i) { |
2d404ffc DM |
1391 | $opt = lc($1); |
1392 | $value = int($2); | |
178a63be | 1393 | } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) { |
2d404ffc DM |
1394 | $opt = lc($1); |
1395 | $value = $2 ? lc($3) : ''; | |
72f63fde | 1396 | } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) { |
2d404ffc DM |
1397 | $opt = lc($1); |
1398 | $value = uc($3); | |
490cdead DM |
1399 | } elsif ($line =~ m/^(nf_conntrack_max):\s*(\d+)\s*$/i) { |
1400 | $opt = lc($1); | |
1401 | $value = int($2); | |
2d404ffc DM |
1402 | } else { |
1403 | chomp $line; | |
1404 | die "can't parse option '$line'\n" | |
1405 | } | |
1406 | ||
1407 | return ($opt, $value); | |
1408 | } | |
1409 | ||
51bae274 DM |
1410 | sub parse_vm_fw_rules { |
1411 | my ($filename, $fh) = @_; | |
1412 | ||
92e976b3 | 1413 | my $res = { rules => [], options => {}}; |
51bae274 DM |
1414 | |
1415 | my $section; | |
1416 | ||
e7b35711 DM |
1417 | my $digest = Digest::SHA->new('sha1'); |
1418 | ||
5e1267a5 | 1419 | while (defined(my $line = <$fh>)) { |
e7b35711 DM |
1420 | $digest->add($line); |
1421 | ||
5e1267a5 DM |
1422 | next if $line =~ m/^#/; |
1423 | next if $line =~ m/^\s*$/; | |
1424 | ||
961b4928 DM |
1425 | my $linenr = $fh->input_line_number(); |
1426 | my $prefix = "$filename (line $linenr)"; | |
1427 | ||
85c6eaed | 1428 | if ($line =~ m/^\[(\S+)\]\s*$/i) { |
5e1267a5 | 1429 | $section = lc($1); |
85c6eaed | 1430 | warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section}; |
5e1267a5 DM |
1431 | next; |
1432 | } | |
51bae274 | 1433 | if (!$section) { |
961b4928 | 1434 | warn "$prefix: skip line - no section"; |
5e1267a5 DM |
1435 | next; |
1436 | } | |
1437 | ||
85c6eaed DM |
1438 | next if !$res->{$section}; # skip undefined section |
1439 | ||
1440 | if ($section eq 'options') { | |
6158271d | 1441 | eval { |
2d404ffc | 1442 | my ($opt, $value) = parse_vmfw_option($line); |
85c6eaed DM |
1443 | $res->{options}->{$opt} = $value; |
1444 | }; | |
1445 | warn "$prefix: $@" if $@; | |
1446 | next; | |
1447 | } | |
1448 | ||
961b4928 DM |
1449 | my $rules; |
1450 | eval { $rules = parse_fw_rule($line, 1, 1); }; | |
51bae274 | 1451 | if (my $err = $@) { |
961b4928 | 1452 | warn "$prefix: $err"; |
5e1267a5 DM |
1453 | next; |
1454 | } | |
1455 | ||
961b4928 | 1456 | push @{$res->{$section}}, @$rules; |
51bae274 DM |
1457 | } |
1458 | ||
e7b35711 DM |
1459 | $res->{digest} = $digest->b64digest; |
1460 | ||
51bae274 DM |
1461 | return $res; |
1462 | } | |
1463 | ||
1464 | sub parse_host_fw_rules { | |
1465 | my ($filename, $fh) = @_; | |
1466 | ||
92e976b3 | 1467 | my $res = { rules => [], options => {}}; |
51bae274 DM |
1468 | |
1469 | my $section; | |
1470 | ||
8b27beb9 DM |
1471 | my $digest = Digest::SHA->new('sha1'); |
1472 | ||
51bae274 | 1473 | while (defined(my $line = <$fh>)) { |
8b27beb9 DM |
1474 | $digest->add($line); |
1475 | ||
51bae274 DM |
1476 | next if $line =~ m/^#/; |
1477 | next if $line =~ m/^\s*$/; | |
1478 | ||
961b4928 DM |
1479 | my $linenr = $fh->input_line_number(); |
1480 | my $prefix = "$filename (line $linenr)"; | |
1481 | ||
2d404ffc | 1482 | if ($line =~ m/^\[(\S+)\]\s*$/i) { |
51bae274 | 1483 | $section = lc($1); |
2d404ffc | 1484 | warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section}; |
5e1267a5 DM |
1485 | next; |
1486 | } | |
51bae274 | 1487 | if (!$section) { |
961b4928 | 1488 | warn "$prefix: skip line - no section"; |
5e1267a5 DM |
1489 | next; |
1490 | } | |
1491 | ||
2d404ffc DM |
1492 | next if !$res->{$section}; # skip undefined section |
1493 | ||
1494 | if ($section eq 'options') { | |
1495 | eval { | |
2d404ffc DM |
1496 | my ($opt, $value) = parse_hostfw_option($line); |
1497 | $res->{options}->{$opt} = $value; | |
1498 | }; | |
1499 | warn "$prefix: $@" if $@; | |
1500 | next; | |
1501 | } | |
1502 | ||
961b4928 DM |
1503 | my $rules; |
1504 | eval { $rules = parse_fw_rule($line, 1, 1); }; | |
ecbea048 | 1505 | if (my $err = $@) { |
961b4928 | 1506 | warn "$prefix: $err"; |
ecbea048 | 1507 | next; |
ecbea048 DM |
1508 | } |
1509 | ||
961b4928 | 1510 | push @{$res->{$section}}, @$rules; |
51bae274 | 1511 | } |
ecbea048 | 1512 | |
8b27beb9 DM |
1513 | $res->{digest} = $digest->b64digest; |
1514 | ||
51bae274 DM |
1515 | return $res; |
1516 | } | |
4cdbb3b7 | 1517 | |
51bae274 DM |
1518 | sub parse_group_fw_rules { |
1519 | my ($filename, $fh) = @_; | |
5e1267a5 | 1520 | |
51bae274 DM |
1521 | my $section; |
1522 | my $group; | |
1523 | ||
8f119284 | 1524 | my $res = { rules => {} }; |
6158271d | 1525 | |
d1c53b3e DM |
1526 | my $digest = Digest::SHA->new('sha1'); |
1527 | ||
51bae274 | 1528 | while (defined(my $line = <$fh>)) { |
d1c53b3e DM |
1529 | $digest->add($line); |
1530 | ||
51bae274 DM |
1531 | next if $line =~ m/^#/; |
1532 | next if $line =~ m/^\s*$/; | |
1533 | ||
961b4928 DM |
1534 | my $linenr = $fh->input_line_number(); |
1535 | my $prefix = "$filename (line $linenr)"; | |
1536 | ||
92e976b3 DM |
1537 | if ($line =~ m/^\[group\s+(\S+)\]\s*$/i) { |
1538 | $section = 'rules'; | |
1539 | $group = lc($1); | |
51bae274 DM |
1540 | next; |
1541 | } | |
1542 | if (!$section || !$group) { | |
961b4928 | 1543 | warn "$prefix: skip line - no section"; |
51bae274 DM |
1544 | next; |
1545 | } | |
1546 | ||
961b4928 DM |
1547 | my $rules; |
1548 | eval { $rules = parse_fw_rule($line, 0, 0); }; | |
51bae274 | 1549 | if (my $err = $@) { |
961b4928 | 1550 | warn "$prefix: $err"; |
51bae274 DM |
1551 | next; |
1552 | } | |
1553 | ||
8f119284 | 1554 | push @{$res->{$section}->{$group}}, @$rules; |
5e1267a5 DM |
1555 | } |
1556 | ||
d1c53b3e DM |
1557 | $res->{digest} = $digest->b64digest; |
1558 | ||
5e1267a5 DM |
1559 | return $res; |
1560 | } | |
1561 | ||
06320eb0 DM |
1562 | sub run_locked { |
1563 | my ($code, @param) = @_; | |
1564 | ||
1565 | my $timeout = 10; | |
1566 | ||
1567 | my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param); | |
1568 | ||
1569 | die $@ if $@; | |
1570 | ||
1571 | return $res; | |
1572 | } | |
1573 | ||
5e1267a5 DM |
1574 | sub read_local_vm_config { |
1575 | ||
1576 | my $openvz = {}; | |
5e1267a5 DM |
1577 | my $qemu = {}; |
1578 | ||
c8301d63 | 1579 | my $vmdata = { openvz => $openvz, qemu => $qemu }; |
5e1267a5 | 1580 | |
c8301d63 DM |
1581 | my $vmlist = PVE::Cluster::get_vmlist(); |
1582 | return $vmdata if !$vmlist || !$vmlist->{ids}; | |
1583 | my $ids = $vmlist->{ids}; | |
1584 | ||
1585 | foreach my $vmid (keys %$ids) { | |
1586 | next if !$vmid; # skip VE0 | |
1587 | my $d = $ids->{$vmid}; | |
1588 | next if !$d->{node} || $d->{node} ne $nodename; | |
1589 | next if !$d->{type}; | |
1590 | if ($d->{type} eq 'openvz') { | |
d9fee004 DM |
1591 | if ($have_pve_manager) { |
1592 | my $cfspath = PVE::OpenVZ::cfs_config_path($vmid); | |
1593 | if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) { | |
1594 | $openvz->{$vmid} = $conf; | |
1595 | } | |
c8301d63 DM |
1596 | } |
1597 | } elsif ($d->{type} eq 'qemu') { | |
d9fee004 DM |
1598 | if ($have_qemu_server) { |
1599 | my $cfspath = PVE::QemuServer::cfs_config_path($vmid); | |
1600 | if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) { | |
1601 | $qemu->{$vmid} = $conf; | |
1602 | } | |
c8301d63 | 1603 | } |
5e1267a5 DM |
1604 | } |
1605 | } | |
d9fee004 | 1606 | |
5e1267a5 DM |
1607 | return $vmdata; |
1608 | }; | |
1609 | ||
e7b35711 DM |
1610 | sub load_vmfw_conf { |
1611 | my ($vmid) = @_; | |
1612 | ||
1613 | my $vmfw_conf = {}; | |
1614 | ||
1615 | my $filename = "/etc/pve/firewall/$vmid.fw"; | |
1616 | if (my $fh = IO::File->new($filename, O_RDONLY)) { | |
1617 | $vmfw_conf = parse_vm_fw_rules($filename, $fh); | |
1618 | } | |
1619 | ||
1620 | return $vmfw_conf; | |
1621 | } | |
1622 | ||
6fc63ffd | 1623 | sub read_vm_firewall_configs { |
5e1267a5 | 1624 | my ($vmdata) = @_; |
6fc63ffd | 1625 | my $vmfw_configs = {}; |
c8301d63 | 1626 | |
5e1267a5 | 1627 | foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) { |
e7b35711 DM |
1628 | my $vmfw_conf = load_vmfw_conf($vmid); |
1629 | next if !$vmfw_conf->{options}; # skip if file does not exists | |
1630 | $vmfw_configs->{$vmid} = $vmfw_conf; | |
5e1267a5 DM |
1631 | } |
1632 | ||
6fc63ffd | 1633 | return $vmfw_configs; |
5e1267a5 DM |
1634 | } |
1635 | ||
2d404ffc DM |
1636 | sub get_option_log_level { |
1637 | my ($options, $k) = @_; | |
1638 | ||
1639 | my $v = $options->{$k}; | |
178a63be | 1640 | $v = $default_log_level if !defined($v); |
2d404ffc DM |
1641 | |
1642 | return undef if $v eq '' || $v eq 'nolog'; | |
1643 | ||
1644 | $v = $log_level_hash->{$v} if defined($log_level_hash->{$v}); | |
1645 | ||
1646 | return $v if ($v >= 0) && ($v <= 7); | |
1647 | ||
1648 | warn "unknown log level ($k = '$v')\n"; | |
1649 | ||
1650 | return undef; | |
1651 | } | |
1652 | ||
d8f2505e | 1653 | sub generate_std_chains { |
2d404ffc DM |
1654 | my ($ruleset, $options) = @_; |
1655 | ||
1656 | my $loglevel = get_option_log_level($options, 'smurf_log_level'); | |
1657 | ||
1658 | # same as shorewall smurflog. | |
782c4cde DM |
1659 | my $chain = 'PVEFW-smurflog'; |
1660 | ||
1661 | push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel; | |
1662 | push @{$pve_std_chains->{$chain}}, "-j DROP"; | |
2d404ffc DM |
1663 | |
1664 | # same as shorewall logflags action. | |
1665 | $loglevel = get_option_log_level($options, 'tcp_flags_log_level'); | |
782c4cde DM |
1666 | $chain = 'PVEFW-logflags'; |
1667 | # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG) | |
1668 | push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel; | |
1669 | push @{$pve_std_chains->{$chain}}, "-j DROP"; | |
d8f2505e DM |
1670 | |
1671 | foreach my $chain (keys %$pve_std_chains) { | |
1672 | ruleset_create_chain($ruleset, $chain); | |
1673 | foreach my $rule (@{$pve_std_chains->{$chain}}) { | |
1674 | if (ref($rule)) { | |
1675 | ruleset_generate_rule($ruleset, $chain, $rule); | |
1676 | } else { | |
1677 | ruleset_addrule($ruleset, $chain, $rule); | |
1678 | } | |
1679 | } | |
1680 | } | |
1681 | } | |
1682 | ||
6b9f68a2 DM |
1683 | sub save_pvefw_status { |
1684 | my ($status) = @_; | |
1685 | ||
1686 | die "unknown status '$status' - internal error" | |
1687 | if $status !~ m/^(stopped|active)$/; | |
1688 | ||
1689 | mkdir dirname($pve_fw_status_filename); | |
1690 | PVE::Tools::file_set_contents($pve_fw_status_filename, $status); | |
1691 | } | |
1692 | ||
1693 | sub read_pvefw_status { | |
1694 | ||
1695 | my $status = 'unknown'; | |
1696 | ||
1697 | return 'stopped' if ! -f $pve_fw_status_filename; | |
1698 | ||
1699 | eval { | |
1700 | $status = PVE::Tools::file_get_contents($pve_fw_status_filename); | |
1701 | }; | |
1702 | warn $@ if $@; | |
1703 | ||
1704 | return $status; | |
1705 | } | |
1706 | ||
530c005e DM |
1707 | # fixme: move to pve-common PVE::ProcFSTools |
1708 | sub read_proc_net_route { | |
1709 | my $filename = "/proc/net/route"; | |
1710 | ||
1711 | my $res = {}; | |
1712 | ||
1713 | my $fh = IO::File->new ($filename, "r"); | |
1714 | return $res if !$fh; | |
1715 | ||
1716 | my $int_to_quad = sub { | |
1717 | return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0); | |
1718 | }; | |
1719 | ||
1720 | while (defined(my $line = <$fh>)) { | |
1721 | next if $line =~/^Iface\s+Destination/; # skip head | |
1722 | my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8]; | |
1723 | push @{$res->{$iface}}, { | |
1724 | dest => &$int_to_quad(hex($dest)), | |
1725 | gateway => &$int_to_quad(hex($gateway)), | |
1726 | mask => &$int_to_quad(hex($mask)), | |
1727 | metric => $metric, | |
1728 | mtu => $mtu, | |
1729 | }; | |
1730 | } | |
1731 | ||
1732 | return $res; | |
1733 | } | |
1734 | ||
e5d76bde | 1735 | sub load_security_groups { |
530c005e | 1736 | |
92e976b3 | 1737 | my $groups_conf = {}; |
51bae274 DM |
1738 | my $filename = "/etc/pve/firewall/groups.fw"; |
1739 | if (my $fh = IO::File->new($filename, O_RDONLY)) { | |
92e976b3 | 1740 | $groups_conf = parse_group_fw_rules($filename, $fh); |
51bae274 | 1741 | } |
5e1267a5 | 1742 | |
e5d76bde DM |
1743 | return $groups_conf; |
1744 | } | |
1745 | ||
8b27beb9 DM |
1746 | sub load_hostfw_conf { |
1747 | ||
1748 | my $hostfw_conf = {}; | |
1749 | my $filename = "/etc/pve/local/host.fw"; | |
1750 | if (my $fh = IO::File->new($filename, O_RDONLY)) { | |
1751 | $hostfw_conf = parse_host_fw_rules($filename, $fh); | |
1752 | } | |
1753 | return $hostfw_conf; | |
1754 | } | |
1755 | ||
e5d76bde DM |
1756 | sub compile { |
1757 | my $vmdata = read_local_vm_config(); | |
1758 | my $vmfw_configs = read_vm_firewall_configs($vmdata); | |
1759 | ||
1760 | my $routing_table = read_proc_net_route(); | |
1761 | ||
1762 | my $groups_conf = load_security_groups(); | |
1763 | ||
3fa83edf DM |
1764 | my $ruleset = {}; |
1765 | ||
dec84fcd DM |
1766 | ruleset_create_chain($ruleset, "PVEFW-INPUT"); |
1767 | ruleset_create_chain($ruleset, "PVEFW-OUTPUT"); | |
5b1df9a0 | 1768 | |
fadb13dd | 1769 | ruleset_create_chain($ruleset, "PVEFW-FORWARD"); |
3fa83edf | 1770 | |
8b27beb9 DM |
1771 | my $hostfw_conf = load_hostfw_conf(); |
1772 | my $hostfw_options = $hostfw_conf->{options} || {}; | |
fadb13dd | 1773 | |
92e976b3 | 1774 | generate_std_chains($ruleset, $hostfw_options); |
fadb13dd | 1775 | |
6d2ab017 | 1776 | my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0)); |
2d404ffc | 1777 | |
d18c1e2b | 1778 | enable_host_firewall($ruleset, $hostfw_conf, $groups_conf) if $hostfw_enable; |
3fa83edf | 1779 | |
6158271d | 1780 | # generate firewall rules for QEMU VMs |
3fa83edf DM |
1781 | foreach my $vmid (keys %{$vmdata->{qemu}}) { |
1782 | my $conf = $vmdata->{qemu}->{$vmid}; | |
6fc63ffd | 1783 | my $vmfw_conf = $vmfw_configs->{$vmid}; |
fa9c4a6f DM |
1784 | next if !$vmfw_conf; |
1785 | next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0); | |
3fa83edf DM |
1786 | |
1787 | foreach my $netid (keys %$conf) { | |
1788 | next if $netid !~ m/^net(\d+)$/; | |
1789 | my $net = PVE::QemuServer::parse_net($conf->{$netid}); | |
1790 | next if !$net; | |
1791 | my $iface = "tap${vmid}i$1"; | |
5e1267a5 | 1792 | |
3fa83edf DM |
1793 | my $bridge = $net->{bridge}; |
1794 | next if !$bridge; # fixme: ? | |
1795 | ||
1796 | $bridge .= "v$net->{tag}" if $net->{tag}; | |
1797 | ||
530c005e | 1798 | generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table); |
3fa83edf | 1799 | |
c29f55c9 | 1800 | my $macaddr = $net->{macaddr}; |
782c4cde DM |
1801 | generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr, |
1802 | $vmfw_conf, $vmid, $bridge, 'IN'); | |
1803 | generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr, | |
1804 | $vmfw_conf, $vmid, $bridge, 'OUT'); | |
3fa83edf DM |
1805 | } |
1806 | } | |
c8301d63 DM |
1807 | |
1808 | # generate firewall rules for OpenVZ containers | |
1809 | foreach my $vmid (keys %{$vmdata->{openvz}}) { | |
1810 | my $conf = $vmdata->{openvz}->{$vmid}; | |
1811 | ||
1812 | my $vmfw_conf = $vmfw_configs->{$vmid}; | |
1813 | next if !$vmfw_conf; | |
1814 | next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0); | |
1815 | ||
1816 | if ($conf->{ip_address} && $conf->{ip_address}->{value}) { | |
1817 | my $ip = $conf->{ip_address}->{value}; | |
9e15114a DM |
1818 | generate_venet_rules_direction($ruleset, $groups_conf, $vmfw_conf, $vmid, $ip, 'IN'); |
1819 | generate_venet_rules_direction($ruleset, $groups_conf, $vmfw_conf, $vmid, $ip, 'OUT'); | |
c8301d63 DM |
1820 | } |
1821 | ||
1822 | if ($conf->{netif} && $conf->{netif}->{value}) { | |
1823 | my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value}); | |
c8301d63 DM |
1824 | foreach my $netid (keys %$netif) { |
1825 | my $d = $netif->{$netid}; | |
1826 | my $bridge = $d->{bridge}; | |
1827 | if (!$bridge) { | |
1828 | warn "no bridge device for CT $vmid iface '$netid'\n"; | |
1829 | next; # fixme? | |
1830 | } | |
530c005e DM |
1831 | |
1832 | generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table); | |
1833 | ||
12d0f130 | 1834 | my $macaddr = $d->{mac}; |
c8301d63 | 1835 | my $iface = $d->{host_ifname}; |
782c4cde DM |
1836 | generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr, |
1837 | $vmfw_conf, $vmid, $bridge, 'IN'); | |
1838 | generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr, | |
1839 | $vmfw_conf, $vmid, $bridge, 'OUT'); | |
c8301d63 DM |
1840 | } |
1841 | } | |
1842 | } | |
c0413e35 | 1843 | |
eba0fb64 DM |
1844 | # fixme: what log level should we use here? |
1845 | my $loglevel = get_option_log_level($hostfw_options, "log_level_out"); | |
1846 | ||
c98c037d DM |
1847 | # fixme: should we really block inter-bridge traffic? |
1848 | ||
1849 | # always allow traffic from containers? | |
1850 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN"); | |
1851 | ||
eba0fb64 DM |
1852 | # disable interbridge routing |
1853 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop"); | |
1854 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop"); | |
782c4cde DM |
1855 | ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-o vmbr+"); |
1856 | ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-i vmbr+"); | |
eba0fb64 DM |
1857 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP"); |
1858 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP"); | |
1859 | ||
490cdead | 1860 | return wantarray ? ($ruleset, $hostfw_conf) : $ruleset; |
3fa83edf DM |
1861 | } |
1862 | ||
1863 | sub get_ruleset_status { | |
1864 | my ($ruleset, $verbose) = @_; | |
1865 | ||
1866 | my $active_chains = iptables_get_chains(); | |
1867 | ||
1868 | my $statushash = {}; | |
1869 | ||
1870 | foreach my $chain (sort keys %$ruleset) { | |
09d5f68e | 1871 | my $digest = Digest::SHA->new('sha1'); |
3fa83edf DM |
1872 | foreach my $cmd (@{$ruleset->{$chain}}) { |
1873 | $digest->add("$cmd\n"); | |
1874 | } | |
1875 | my $sig = $digest->b64digest; | |
1876 | $statushash->{$chain}->{sig} = $sig; | |
1877 | ||
1878 | my $oldsig = $active_chains->{$chain}; | |
1879 | if (!defined($oldsig)) { | |
1880 | $statushash->{$chain}->{action} = 'create'; | |
1881 | } else { | |
1882 | if ($oldsig eq $sig) { | |
1883 | $statushash->{$chain}->{action} = 'exists'; | |
1884 | } else { | |
1885 | $statushash->{$chain}->{action} = 'update'; | |
1886 | } | |
1887 | } | |
1888 | print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose; | |
1889 | foreach my $cmd (@{$ruleset->{$chain}}) { | |
1890 | print "\t$cmd\n" if $verbose; | |
1891 | } | |
1892 | } | |
1893 | ||
1894 | foreach my $chain (sort keys %$active_chains) { | |
1895 | if (!defined($ruleset->{$chain})) { | |
1896 | my $sig = $active_chains->{$chain}; | |
1897 | $statushash->{$chain}->{action} = 'delete'; | |
1898 | $statushash->{$chain}->{sig} = $sig; | |
1899 | print "delete $chain ($sig)\n" if $verbose; | |
1900 | } | |
6158271d | 1901 | } |
3fa83edf DM |
1902 | |
1903 | return $statushash; | |
1904 | } | |
1905 | ||
1906 | sub print_ruleset { | |
1907 | my ($ruleset) = @_; | |
1908 | ||
1909 | get_ruleset_status($ruleset, 1); | |
1910 | } | |
1911 | ||
1912 | sub print_sig_rule { | |
1913 | my ($chain, $sig) = @_; | |
1914 | ||
09d5f68e DM |
1915 | # We just use this to store a SHA1 checksum used to detect changes |
1916 | return "-A $chain -m comment --comment \"PVESIG:$sig\"\n"; | |
b6360c3f DM |
1917 | } |
1918 | ||
6b9f68a2 | 1919 | sub get_rulset_cmdlist { |
a84f4d96 | 1920 | my ($ruleset, $verbose) = @_; |
3fa83edf | 1921 | |
3fa83edf DM |
1922 | my $cmdlist = "*filter\n"; # we pass this to iptables-restore; |
1923 | ||
1924 | my $statushash = get_ruleset_status($ruleset, $verbose); | |
1925 | ||
1926 | # create missing chains first | |
1927 | foreach my $chain (sort keys %$ruleset) { | |
1928 | my $stat = $statushash->{$chain}; | |
1929 | die "internal error" if !$stat; | |
1930 | next if $stat->{action} ne 'create'; | |
886aba9c | 1931 | |
3fa83edf DM |
1932 | $cmdlist .= ":$chain - [0:0]\n"; |
1933 | } | |
1934 | ||
dec84fcd | 1935 | my $rule = "INPUT -j PVEFW-INPUT"; |
3fa83edf DM |
1936 | if (!PVE::Firewall::iptables_rule_exist($rule)) { |
1937 | $cmdlist .= "-A $rule\n"; | |
1938 | } | |
dec84fcd | 1939 | $rule = "OUTPUT -j PVEFW-OUTPUT"; |
3fa83edf DM |
1940 | if (!PVE::Firewall::iptables_rule_exist($rule)) { |
1941 | $cmdlist .= "-A $rule\n"; | |
1942 | } | |
1943 | ||
dec84fcd | 1944 | $rule = "FORWARD -j PVEFW-FORWARD"; |
3fa83edf DM |
1945 | if (!PVE::Firewall::iptables_rule_exist($rule)) { |
1946 | $cmdlist .= "-A $rule\n"; | |
1947 | } | |
1948 | ||
1949 | foreach my $chain (sort keys %$ruleset) { | |
1950 | my $stat = $statushash->{$chain}; | |
1951 | die "internal error" if !$stat; | |
1952 | ||
1953 | if ($stat->{action} eq 'update' || $stat->{action} eq 'create') { | |
1954 | $cmdlist .= "-F $chain\n"; | |
1955 | foreach my $cmd (@{$ruleset->{$chain}}) { | |
1956 | $cmdlist .= "$cmd\n"; | |
1957 | } | |
1958 | $cmdlist .= print_sig_rule($chain, $stat->{sig}); | |
1959 | } elsif ($stat->{action} eq 'delete') { | |
f5d28682 | 1960 | die "internal error"; # this should not happen |
3fa83edf DM |
1961 | } elsif ($stat->{action} eq 'exists') { |
1962 | # do nothing | |
1963 | } else { | |
1964 | die "internal error - unknown status '$stat->{action}'"; | |
1965 | } | |
1966 | } | |
1967 | ||
f5d28682 DM |
1968 | foreach my $chain (keys %$statushash) { |
1969 | next if $statushash->{$chain}->{action} ne 'delete'; | |
1970 | $cmdlist .= "-F $chain\n"; | |
1971 | } | |
1972 | foreach my $chain (keys %$statushash) { | |
1973 | next if $statushash->{$chain}->{action} ne 'delete'; | |
fadb13dd DM |
1974 | next if $chain eq 'PVEFW-INPUT'; |
1975 | next if $chain eq 'PVEFW-OUTPUT'; | |
1976 | next if $chain eq 'PVEFW-FORWARD'; | |
f5d28682 DM |
1977 | $cmdlist .= "-X $chain\n"; |
1978 | } | |
1979 | ||
3fa83edf DM |
1980 | $cmdlist .= "COMMIT\n"; |
1981 | ||
6b9f68a2 DM |
1982 | return $cmdlist; |
1983 | } | |
1984 | ||
1985 | sub apply_ruleset { | |
edb75ba9 | 1986 | my ($ruleset, $hostfw_conf, $verbose) = @_; |
6b9f68a2 DM |
1987 | |
1988 | enable_bridge_firewall(); | |
1989 | ||
edb75ba9 DM |
1990 | update_nf_conntrack_max($hostfw_conf); |
1991 | ||
6b9f68a2 DM |
1992 | my $cmdlist = get_rulset_cmdlist($ruleset, $verbose); |
1993 | ||
3fa83edf DM |
1994 | print $cmdlist if $verbose; |
1995 | ||
1996 | iptables_restore_cmdlist($cmdlist); | |
1997 | ||
6158271d | 1998 | # test: re-read status and check if everything is up to date |
6b9f68a2 | 1999 | my $statushash = get_ruleset_status($ruleset); |
3fa83edf DM |
2000 | |
2001 | my $errors; | |
2002 | foreach my $chain (sort keys %$ruleset) { | |
2003 | my $stat = $statushash->{$chain}; | |
2004 | if ($stat->{action} ne 'exists') { | |
2005 | warn "unable to update chain '$chain'\n"; | |
2006 | $errors = 1; | |
2007 | } | |
2008 | } | |
b6360c3f | 2009 | |
3fa83edf | 2010 | die "unable to apply firewall changes\n" if $errors; |
b6360c3f DM |
2011 | } |
2012 | ||
490cdead DM |
2013 | sub update_nf_conntrack_max { |
2014 | my ($hostfw_conf) = @_; | |
2015 | ||
2016 | my $max = 65536; # reasonable default | |
2017 | ||
2018 | my $options = $hostfw_conf->{options} || {}; | |
2019 | ||
2020 | if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) { | |
2021 | $max = $options->{nf_conntrack_max}; | |
2022 | $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192 | |
2023 | } | |
2024 | ||
2025 | my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max"; | |
2026 | my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize"; | |
2027 | ||
2028 | my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max); | |
2029 | ||
2030 | if ($current != $max) { | |
2031 | my $hashsize = int($max/4); | |
2032 | PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize); | |
2033 | PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max); | |
2034 | } | |
2035 | } | |
2036 | ||
6b9f68a2 DM |
2037 | sub update { |
2038 | my ($start, $verbose) = @_; | |
2039 | ||
2040 | my $code = sub { | |
2041 | my $status = read_pvefw_status(); | |
2042 | ||
490cdead DM |
2043 | my ($ruleset, $hostfw_conf) = PVE::Firewall::compile(); |
2044 | ||
6b9f68a2 DM |
2045 | if ($start || $status eq 'active') { |
2046 | ||
2047 | save_pvefw_status('active') if ($status ne 'active'); | |
2048 | ||
edb75ba9 | 2049 | apply_ruleset($ruleset, $hostfw_conf, $verbose); |
6b9f68a2 DM |
2050 | } else { |
2051 | print "Firewall not active (status = $status)\n" if $verbose; | |
2052 | } | |
2053 | }; | |
2054 | ||
2055 | run_locked($code); | |
2056 | } | |
2057 | ||
2058 | ||
b6360c3f | 2059 | 1; |