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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; |
f789653a | 7 | use PVE::Tools; |
b6360c3f | 8 | use PVE::QemuServer; |
6b9f68a2 | 9 | use File::Basename; |
5e1267a5 DM |
10 | use File::Path; |
11 | use IO::File; | |
ecbea048 | 12 | use Net::IP; |
06320eb0 | 13 | use PVE::Tools qw(run_command lock_file); |
ecbea048 | 14 | |
5e1267a5 | 15 | use Data::Dumper; |
b6360c3f | 16 | |
06320eb0 | 17 | my $pve_fw_lock_filename = "/var/lock/pvefw.lck"; |
6b9f68a2 | 18 | my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status"; |
06320eb0 | 19 | |
857f62c8 | 20 | # imported/converted from: /usr/share/shorewall/macro.* |
961b4928 | 21 | my $pve_fw_macros = { |
857f62c8 DM |
22 | 'Amanda' => [ |
23 | { action => 'PARAM', proto => 'udp', dport => '10080' }, | |
24 | { action => 'PARAM', proto => 'tcp', dport => '10080' }, | |
25 | ], | |
26 | 'Auth' => [ | |
27 | { action => 'PARAM', proto => 'tcp', dport => '113' }, | |
28 | ], | |
29 | 'BGP' => [ | |
30 | { action => 'PARAM', proto => 'tcp', dport => '179' }, | |
31 | ], | |
32 | 'BitTorrent' => [ | |
961b4928 | 33 | { action => 'PARAM', proto => 'tcp', dport => '6881:6889' }, |
857f62c8 DM |
34 | { action => 'PARAM', proto => 'udp', dport => '6881' }, |
35 | ], | |
36 | 'BitTorrent32' => [ | |
37 | { action => 'PARAM', proto => 'tcp', dport => '6881:6999' }, | |
38 | { action => 'PARAM', proto => 'udp', dport => '6881' }, | |
39 | ], | |
40 | 'CVS' => [ | |
41 | { action => 'PARAM', proto => 'tcp', dport => '2401' }, | |
42 | ], | |
43 | 'Citrix' => [ | |
44 | { action => 'PARAM', proto => 'tcp', dport => '1494' }, | |
45 | { action => 'PARAM', proto => 'udp', dport => '1604' }, | |
46 | { action => 'PARAM', proto => 'tcp', dport => '2598' }, | |
47 | ], | |
48 | 'DAAP' => [ | |
49 | { action => 'PARAM', proto => 'tcp', dport => '3689' }, | |
50 | { action => 'PARAM', proto => 'udp', dport => '3689' }, | |
51 | ], | |
52 | 'DCC' => [ | |
53 | { action => 'PARAM', proto => 'tcp', dport => '6277' }, | |
54 | ], | |
55 | 'DHCPfwd' => [ | |
56 | { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' }, | |
57 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' }, | |
58 | ], | |
59 | 'DNS' => [ | |
60 | { action => 'PARAM', proto => 'udp', dport => '53' }, | |
61 | { action => 'PARAM', proto => 'tcp', dport => '53' }, | |
62 | ], | |
63 | 'Distcc' => [ | |
64 | { action => 'PARAM', proto => 'tcp', dport => '3632' }, | |
65 | ], | |
66 | 'Edonkey' => [ | |
67 | { action => 'PARAM', proto => 'tcp', dport => '4662' }, | |
68 | { action => 'PARAM', proto => 'udp', dport => '4665' }, | |
961b4928 | 69 | ], |
857f62c8 DM |
70 | 'FTP' => [ |
71 | { action => 'PARAM', proto => 'tcp', dport => '21' }, | |
72 | ], | |
73 | 'Finger' => [ | |
74 | { action => 'PARAM', proto => 'tcp', dport => '79' }, | |
75 | ], | |
76 | 'GNUnet' => [ | |
77 | { action => 'PARAM', proto => 'tcp', dport => '2086' }, | |
78 | { action => 'PARAM', proto => 'udp', dport => '2086' }, | |
79 | { action => 'PARAM', proto => 'tcp', dport => '1080' }, | |
80 | { action => 'PARAM', proto => 'udp', dport => '1080' }, | |
81 | ], | |
82 | 'GRE' => [ | |
83 | { action => 'PARAM', proto => '47' }, | |
84 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' }, | |
85 | ], | |
86 | 'Git' => [ | |
87 | { action => 'PARAM', proto => 'tcp', dport => '9418' }, | |
88 | ], | |
89 | 'Gnutella' => [ | |
90 | { action => 'PARAM', proto => 'tcp', dport => '6346' }, | |
91 | { action => 'PARAM', proto => 'udp', dport => '6346' }, | |
92 | ], | |
93 | 'HKP' => [ | |
94 | { action => 'PARAM', proto => 'tcp', dport => '11371' }, | |
95 | ], | |
96 | 'HTTP' => [ | |
961b4928 DM |
97 | { action => 'PARAM', proto => 'tcp', dport => '80' }, |
98 | ], | |
857f62c8 DM |
99 | 'HTTPS' => [ |
100 | { action => 'PARAM', proto => 'tcp', dport => '443' }, | |
101 | ], | |
102 | 'ICPV2' => [ | |
103 | { action => 'PARAM', proto => 'udp', dport => '3130' }, | |
104 | ], | |
105 | 'ICQ' => [ | |
106 | { action => 'PARAM', proto => 'tcp', dport => '5190' }, | |
107 | ], | |
108 | 'IMAP' => [ | |
109 | { action => 'PARAM', proto => 'tcp', dport => '143' }, | |
110 | ], | |
111 | 'IMAPS' => [ | |
112 | { action => 'PARAM', proto => 'tcp', dport => '993' }, | |
113 | ], | |
114 | 'IPIP' => [ | |
115 | { action => 'PARAM', proto => '94' }, | |
116 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' }, | |
117 | ], | |
118 | 'IPP' => [ | |
119 | { action => 'PARAM', proto => 'tcp', dport => '631' }, | |
120 | ], | |
121 | 'IPPbrd' => [ | |
122 | { action => 'PARAM', proto => 'udp', dport => '631' }, | |
123 | ], | |
124 | 'IPPserver' => [ | |
125 | { action => 'PARAM', source => 'SOURCE', dest => 'DEST', proto => 'tcp', dport => '631' }, | |
126 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '631' }, | |
127 | ], | |
128 | 'IPsec' => [ | |
129 | { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' }, | |
130 | { action => 'PARAM', proto => '50' }, | |
131 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' }, | |
132 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' }, | |
133 | ], | |
134 | 'IPsecah' => [ | |
135 | { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' }, | |
136 | { action => 'PARAM', proto => '51' }, | |
137 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' }, | |
138 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' }, | |
139 | ], | |
140 | 'IPsecnat' => [ | |
141 | { action => 'PARAM', proto => 'udp', dport => '500' }, | |
142 | { action => 'PARAM', proto => 'udp', dport => '4500' }, | |
143 | { action => 'PARAM', proto => '50' }, | |
144 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' }, | |
145 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' }, | |
146 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' }, | |
147 | ], | |
148 | 'IRC' => [ | |
149 | { action => 'PARAM', proto => 'tcp', dport => '6667' }, | |
150 | ], | |
151 | 'JabberPlain' => [ | |
152 | { action => 'PARAM', proto => 'tcp', dport => '5222' }, | |
153 | ], | |
154 | 'JabberSecure' => [ | |
155 | { action => 'PARAM', proto => 'tcp', dport => '5223' }, | |
156 | ], | |
157 | 'Jabberd' => [ | |
158 | { action => 'PARAM', proto => 'tcp', dport => '5269' }, | |
159 | ], | |
160 | 'Jetdirect' => [ | |
161 | { action => 'PARAM', proto => 'tcp', dport => '9100' }, | |
162 | ], | |
163 | 'L2TP' => [ | |
164 | { action => 'PARAM', proto => 'udp', dport => '1701' }, | |
165 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' }, | |
166 | ], | |
167 | 'LDAP' => [ | |
168 | { action => 'PARAM', proto => 'tcp', dport => '389' }, | |
169 | ], | |
170 | 'LDAPS' => [ | |
171 | { action => 'PARAM', proto => 'tcp', dport => '636' }, | |
172 | ], | |
173 | 'MSNP' => [ | |
174 | { action => 'PARAM', proto => 'tcp', dport => '1863' }, | |
175 | ], | |
176 | 'MSSQL' => [ | |
177 | { action => 'PARAM', proto => 'tcp', dport => '1433' }, | |
178 | ], | |
179 | 'Mail' => [ | |
180 | { action => 'PARAM', proto => 'tcp', dport => '25' }, | |
181 | { action => 'PARAM', proto => 'tcp', dport => '465' }, | |
182 | { action => 'PARAM', proto => 'tcp', dport => '587' }, | |
183 | ], | |
184 | 'Munin' => [ | |
185 | { action => 'PARAM', proto => 'tcp', dport => '4949' }, | |
186 | ], | |
187 | 'MySQL' => [ | |
188 | { action => 'PARAM', proto => 'tcp', dport => '3306' }, | |
189 | ], | |
190 | 'NNTP' => [ | |
191 | { action => 'PARAM', proto => 'tcp', dport => '119' }, | |
192 | ], | |
193 | 'NNTPS' => [ | |
194 | { action => 'PARAM', proto => 'tcp', dport => '563' }, | |
195 | ], | |
196 | 'NTP' => [ | |
197 | { action => 'PARAM', proto => 'udp', dport => '123' }, | |
198 | ], | |
199 | 'NTPbi' => [ | |
200 | { action => 'PARAM', proto => 'udp', dport => '123' }, | |
201 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' }, | |
202 | ], | |
203 | 'NTPbrd' => [ | |
204 | { action => 'PARAM', proto => 'udp', dport => '123' }, | |
205 | { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '123' }, | |
206 | ], | |
207 | 'OSPF' => [ | |
208 | { action => 'PARAM', proto => '89' }, | |
209 | ], | |
210 | 'OpenVPN' => [ | |
211 | { action => 'PARAM', proto => 'udp', dport => '1194' }, | |
212 | ], | |
213 | 'PCA' => [ | |
214 | { action => 'PARAM', proto => 'udp', dport => '5632' }, | |
215 | { action => 'PARAM', proto => 'tcp', dport => '5631' }, | |
216 | ], | |
217 | 'POP3' => [ | |
218 | { action => 'PARAM', proto => 'tcp', dport => '110' }, | |
219 | ], | |
220 | 'POP3S' => [ | |
221 | { action => 'PARAM', proto => 'tcp', dport => '995' }, | |
222 | ], | |
223 | 'PPtP' => [ | |
224 | { action => 'PARAM', proto => '47' }, | |
225 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' }, | |
226 | { action => 'PARAM', proto => 'tcp', dport => '1723' }, | |
227 | ], | |
228 | 'Ping' => [ | |
269d4f13 | 229 | { action => 'PARAM', proto => 'icmp', dport => 'echo-request' }, |
857f62c8 DM |
230 | ], |
231 | 'PostgreSQL' => [ | |
232 | { action => 'PARAM', proto => 'tcp', dport => '5432' }, | |
233 | ], | |
234 | 'Printer' => [ | |
235 | { action => 'PARAM', proto => 'tcp', dport => '515' }, | |
236 | ], | |
237 | 'RDP' => [ | |
238 | { action => 'PARAM', proto => 'tcp', dport => '3389' }, | |
239 | ], | |
240 | 'RIPbi' => [ | |
241 | { action => 'PARAM', proto => 'udp', dport => '520' }, | |
242 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' }, | |
243 | ], | |
244 | 'RNDC' => [ | |
245 | { action => 'PARAM', proto => 'tcp', dport => '953' }, | |
246 | ], | |
247 | 'Razor' => [ | |
248 | { action => 'ACCEPT', proto => 'tcp', dport => '2703' }, | |
249 | ], | |
250 | 'Rdate' => [ | |
251 | { action => 'PARAM', proto => 'tcp', dport => '37' }, | |
252 | ], | |
253 | 'Rsync' => [ | |
254 | { action => 'PARAM', proto => 'tcp', dport => '873' }, | |
255 | ], | |
256 | 'SANE' => [ | |
257 | { action => 'PARAM', proto => 'tcp', dport => '6566' }, | |
258 | ], | |
259 | 'SMB' => [ | |
260 | { action => 'PARAM', proto => 'udp', dport => '135,445' }, | |
261 | { action => 'PARAM', proto => 'udp', dport => '137:139' }, | |
262 | { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' }, | |
263 | { action => 'PARAM', proto => 'tcp', dport => '135,139,445' }, | |
264 | ], | |
265 | 'SMBBI' => [ | |
266 | { action => 'PARAM', proto => 'udp', dport => '135,445' }, | |
267 | { action => 'PARAM', proto => 'udp', dport => '137:139' }, | |
268 | { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' }, | |
269 | { action => 'PARAM', proto => 'tcp', dport => '135,139,445' }, | |
270 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' }, | |
271 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' }, | |
272 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' }, | |
273 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' }, | |
274 | ], | |
275 | 'SMBswat' => [ | |
276 | { action => 'PARAM', proto => 'tcp', dport => '901' }, | |
277 | ], | |
278 | 'SMTP' => [ | |
279 | { action => 'PARAM', proto => 'tcp', dport => '25' }, | |
280 | ], | |
281 | 'SMTPS' => [ | |
282 | { action => 'PARAM', proto => 'tcp', dport => '465' }, | |
283 | ], | |
284 | 'SNMP' => [ | |
285 | { action => 'PARAM', proto => 'udp', dport => '161:162' }, | |
286 | { action => 'PARAM', proto => 'tcp', dport => '161' }, | |
287 | ], | |
288 | 'SPAMD' => [ | |
289 | { action => 'PARAM', proto => 'tcp', dport => '783' }, | |
290 | ], | |
291 | 'SSH' => [ | |
292 | { action => 'PARAM', proto => 'tcp', dport => '22' }, | |
293 | ], | |
294 | 'SVN' => [ | |
295 | { action => 'PARAM', proto => 'tcp', dport => '3690' }, | |
296 | ], | |
297 | 'SixXS' => [ | |
298 | { action => 'PARAM', proto => 'tcp', dport => '3874' }, | |
299 | { action => 'PARAM', proto => 'udp', dport => '3740' }, | |
300 | { action => 'PARAM', proto => '41' }, | |
301 | { action => 'PARAM', proto => 'udp', dport => '5072,8374' }, | |
302 | ], | |
303 | 'Squid' => [ | |
304 | { action => 'PARAM', proto => 'tcp', dport => '3128' }, | |
305 | ], | |
306 | 'Submission' => [ | |
307 | { action => 'PARAM', proto => 'tcp', dport => '587' }, | |
308 | ], | |
309 | 'Syslog' => [ | |
310 | { action => 'PARAM', proto => 'udp', dport => '514' }, | |
311 | { action => 'PARAM', proto => 'tcp', dport => '514' }, | |
312 | ], | |
313 | 'TFTP' => [ | |
314 | { action => 'PARAM', proto => 'udp', dport => '69' }, | |
315 | ], | |
316 | 'Telnet' => [ | |
317 | { action => 'PARAM', proto => 'tcp', dport => '23' }, | |
318 | ], | |
319 | 'Telnets' => [ | |
320 | { action => 'PARAM', proto => 'tcp', dport => '992' }, | |
321 | ], | |
322 | 'Time' => [ | |
323 | { action => 'PARAM', proto => 'tcp', dport => '37' }, | |
324 | ], | |
325 | 'Trcrt' => [ | |
326 | { action => 'PARAM', proto => 'udp', dport => '33434:33524' }, | |
269d4f13 | 327 | { action => 'PARAM', proto => 'icmp', dport => 'echo-request' }, |
857f62c8 DM |
328 | ], |
329 | 'VNC' => [ | |
330 | { action => 'PARAM', proto => 'tcp', dport => '5900:5909' }, | |
331 | ], | |
332 | 'VNCL' => [ | |
333 | { action => 'PARAM', proto => 'tcp', dport => '5500' }, | |
334 | ], | |
335 | 'Web' => [ | |
336 | { action => 'PARAM', proto => 'tcp', dport => '80' }, | |
961b4928 DM |
337 | { action => 'PARAM', proto => 'tcp', dport => '443' }, |
338 | ], | |
857f62c8 DM |
339 | 'Webcache' => [ |
340 | { action => 'PARAM', proto => 'tcp', dport => '8080' }, | |
341 | ], | |
342 | 'Webmin' => [ | |
343 | { action => 'PARAM', proto => 'tcp', dport => '10000' }, | |
344 | ], | |
345 | 'Whois' => [ | |
346 | { action => 'PARAM', proto => 'tcp', dport => '43' }, | |
347 | ], | |
961b4928 DM |
348 | }; |
349 | ||
350 | my $pve_fw_parsed_macros; | |
351 | my $pve_fw_preferred_macro_names = {}; | |
3a616aa0 | 352 | |
d8f2505e DM |
353 | my $pve_std_chains = { |
354 | 'PVEFW-SET-ACCEPT-MARK' => [ | |
355 | "-j MARK --set-mark 1", | |
356 | ], | |
79929d9c DM |
357 | 'PVEFW-DropBroadcast' => [ |
358 | # same as shorewall 'Broadcast' | |
359 | # simply DROP BROADCAST/MULTICAST/ANYCAST | |
360 | # we can use this to reduce logging | |
361 | { action => 'DROP', dsttype => 'BROADCAST' }, | |
362 | { action => 'DROP', dsttype => 'MULTICAST' }, | |
363 | { action => 'DROP', dsttype => 'ANYCAST' }, | |
364 | { action => 'DROP', dest => '224.0.0.0/4' }, | |
365 | ], | |
366 | 'PVEFW-reject' => [ | |
367 | # same as shorewall 'reject' | |
368 | { action => 'DROP', dsttype => 'BROADCAST' }, | |
369 | { action => 'DROP', source => '224.0.0.0/4' }, | |
370 | { action => 'DROP', proto => 'icmp' }, | |
371 | "-p tcp -j REJECT --reject-with tcp-reset", | |
372 | "-p udp -j REJECT --reject-with icmp-port-unreachable", | |
373 | "-p icmp -j REJECT --reject-with icmp-host-unreachable", | |
374 | "-j REJECT --reject-with icmp-host-prohibited", | |
375 | ], | |
376 | 'PVEFW-Drop' => [ | |
377 | # same as shorewall 'Drop', which is equal to DROP, | |
378 | # but REJECT/DROP some packages to reduce logging, | |
379 | # and ACCEPT critical ICMP types | |
380 | { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth' | |
381 | # we are not interested in BROADCAST/MULTICAST/ANYCAST | |
382 | { action => 'PVEFW-DropBroadcast' }, | |
383 | # ACCEPT critical ICMP types | |
384 | { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' }, | |
385 | { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' }, | |
386 | # Drop packets with INVALID state | |
387 | "-m conntrack --ctstate INVALID -j DROP", | |
388 | # Drop Microsoft SMB noise | |
389 | { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 }, | |
390 | { action => 'DROP', proto => 'udp', dport => '137:139'}, | |
391 | { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 }, | |
392 | { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 }, | |
393 | { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP | |
394 | # Drop new/NotSyn traffic so that it doesn't get logged | |
395 | "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP", | |
396 | # Drop DNS replies | |
397 | { action => 'DROP', proto => 'udp', sport => 53 }, | |
398 | ], | |
399 | 'PVEFW-Reject' => [ | |
400 | # same as shorewall 'Reject', which is equal to Reject, | |
401 | # but REJECT/DROP some packages to reduce logging, | |
402 | # and ACCEPT critical ICMP types | |
403 | { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth' | |
404 | # we are not interested in BROADCAST/MULTICAST/ANYCAST | |
405 | { action => 'PVEFW-DropBroadcast' }, | |
406 | # ACCEPT critical ICMP types | |
407 | { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' }, | |
408 | { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' }, | |
409 | # Drop packets with INVALID state | |
410 | "-m conntrack --ctstate INVALID -j DROP", | |
411 | # Drop Microsoft SMB noise | |
412 | { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 }, | |
413 | { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'}, | |
414 | { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 }, | |
415 | { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 }, | |
416 | { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP | |
417 | # Drop new/NotSyn traffic so that it doesn't get logged | |
418 | "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP", | |
419 | # Drop DNS replies | |
420 | { action => 'DROP', proto => 'udp', sport => 53 }, | |
421 | ], | |
d86659ef | 422 | 'PVEFW-logflags' => [ |
bee633ab | 423 | # same as shorewall logflags action. (fixme: enable/disable logging) |
d86659ef DM |
424 | "-j LOG --log-prefix \"logflags-dropped:\" --log-level 4 --log-ip-options", |
425 | "-j DROP", | |
426 | ], | |
427 | 'PVEFW-tcpflags' => [ | |
428 | # same as shorewall tcpflags action. | |
429 | # Packets arriving on this interface are checked for som illegal combinations of TCP flags | |
430 | "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags", | |
431 | "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags", | |
432 | "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags", | |
433 | "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags", | |
434 | "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags", | |
435 | ], | |
bee633ab DM |
436 | 'PVEFW-smurflog' => [ |
437 | # same as shorewall smurflog. (fixme: enable/disable logging) | |
438 | "-j LOG --log-prefix \"smurfs-dropped\" --log-level 4", | |
439 | "-j DROP", | |
440 | ], | |
441 | 'PVEFW-smurfs' => [ | |
442 | # same as shorewall smurfs action | |
443 | # Filter packets for smurfs (packets with a broadcast address as the source). | |
444 | "-s 0.0.0.0/32 -j RETURN", | |
445 | "-m addrtype --src-type BROADCAST -g PVEFW-smurflog", | |
446 | "-s 224.0.0.0/4 -g PVEFW-smurflog", | |
447 | ], | |
d8f2505e DM |
448 | }; |
449 | ||
4b586518 DM |
450 | # iptables -p icmp -h |
451 | my $icmp_type_names = { | |
452 | any => 1, | |
453 | 'echo-reply' => 1, | |
454 | 'destination-unreachable' => 1, | |
455 | 'network-unreachable' => 1, | |
456 | 'host-unreachable' => 1, | |
457 | 'protocol-unreachable' => 1, | |
458 | 'port-unreachable' => 1, | |
459 | 'fragmentation-needed' => 1, | |
460 | 'source-route-failed' => 1, | |
461 | 'network-unknown' => 1, | |
462 | 'host-unknown' => 1, | |
463 | 'network-prohibited' => 1, | |
464 | 'host-prohibited' => 1, | |
465 | 'TOS-network-unreachable' => 1, | |
466 | 'TOS-host-unreachable' => 1, | |
467 | 'communication-prohibited' => 1, | |
468 | 'host-precedence-violation' => 1, | |
469 | 'precedence-cutoff' => 1, | |
470 | 'source-quench' => 1, | |
471 | 'redirect' => 1, | |
472 | 'network-redirect' => 1, | |
473 | 'host-redirect' => 1, | |
474 | 'TOS-network-redirect' => 1, | |
475 | 'TOS-host-redirect' => 1, | |
476 | 'echo-request' => 1, | |
477 | 'router-advertisement' => 1, | |
478 | 'router-solicitation' => 1, | |
479 | 'time-exceeded' => 1, | |
480 | 'ttl-zero-during-transit' => 1, | |
481 | 'ttl-zero-during-reassembly' => 1, | |
482 | 'parameter-problem' => 1, | |
483 | 'ip-header-bad' => 1, | |
484 | 'required-option-missing' => 1, | |
485 | 'timestamp-request' => 1, | |
486 | 'timestamp-reply' => 1, | |
487 | 'address-mask-request' => 1, | |
488 | 'address-mask-reply' => 1, | |
489 | }; | |
490 | ||
a332200b | 491 | sub get_firewall_macros { |
9aab3127 | 492 | |
961b4928 | 493 | return $pve_fw_parsed_macros if $pve_fw_parsed_macros; |
6158271d | 494 | |
961b4928 | 495 | $pve_fw_parsed_macros = {}; |
9aab3127 | 496 | |
961b4928 DM |
497 | foreach my $k (keys %$pve_fw_macros) { |
498 | my $name = lc($k); | |
a332200b | 499 | |
961b4928 DM |
500 | my $macro = $pve_fw_macros->{$k}; |
501 | $pve_fw_preferred_macro_names->{$name} = $k; | |
502 | $pve_fw_parsed_macros->{$name} = $macro; | |
503 | } | |
a332200b | 504 | |
961b4928 | 505 | return $pve_fw_parsed_macros; |
9aab3127 DM |
506 | } |
507 | ||
fcba0beb DM |
508 | my $etc_services; |
509 | ||
510 | sub get_etc_services { | |
511 | ||
512 | return $etc_services if $etc_services; | |
513 | ||
514 | my $filename = "/etc/services"; | |
515 | ||
516 | my $fh = IO::File->new($filename, O_RDONLY); | |
517 | if (!$fh) { | |
518 | warn "unable to read '$filename' - $!\n"; | |
519 | return {}; | |
520 | } | |
521 | ||
522 | my $services = {}; | |
523 | ||
524 | while (my $line = <$fh>) { | |
525 | chomp ($line); | |
526 | next if $line =~m/^#/; | |
527 | next if ($line =~m/^\s*$/); | |
528 | ||
529 | if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) { | |
530 | $services->{byid}->{$2}->{name} = $1; | |
35b66e9d | 531 | $services->{byid}->{$2}->{port} = $2; |
fcba0beb DM |
532 | $services->{byid}->{$2}->{$3} = 1; |
533 | $services->{byname}->{$1} = $services->{byid}->{$2}; | |
534 | } | |
535 | } | |
536 | ||
537 | close($fh); | |
538 | ||
6158271d DM |
539 | $etc_services = $services; |
540 | ||
3a616aa0 | 541 | |
fcba0beb DM |
542 | return $etc_services; |
543 | } | |
544 | ||
545 | my $etc_protocols; | |
546 | ||
547 | sub get_etc_protocols { | |
548 | return $etc_protocols if $etc_protocols; | |
549 | ||
550 | my $filename = "/etc/protocols"; | |
551 | ||
552 | my $fh = IO::File->new($filename, O_RDONLY); | |
553 | if (!$fh) { | |
554 | warn "unable to read '$filename' - $!\n"; | |
555 | return {}; | |
556 | } | |
557 | ||
558 | my $protocols = {}; | |
559 | ||
560 | while (my $line = <$fh>) { | |
561 | chomp ($line); | |
562 | next if $line =~m/^#/; | |
563 | next if ($line =~m/^\s*$/); | |
564 | ||
565 | if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) { | |
566 | $protocols->{byid}->{$2}->{name} = $1; | |
567 | $protocols->{byname}->{$1} = $protocols->{byid}->{$2}; | |
568 | } | |
569 | } | |
570 | ||
571 | close($fh); | |
572 | ||
573 | $etc_protocols = $protocols; | |
574 | ||
575 | return $etc_protocols; | |
576 | } | |
577 | ||
ecbea048 DM |
578 | sub parse_address_list { |
579 | my ($str) = @_; | |
580 | ||
d6de1dc2 | 581 | my $nbaor = 0; |
ecbea048 DM |
582 | foreach my $aor (split(/,/, $str)) { |
583 | if (!Net::IP->new($aor)) { | |
584 | my $err = Net::IP::Error(); | |
585 | die "invalid IP address: $err\n"; | |
d6de1dc2 AD |
586 | }else{ |
587 | $nbaor++; | |
ecbea048 DM |
588 | } |
589 | } | |
d6de1dc2 | 590 | return $nbaor; |
ecbea048 | 591 | } |
dddd9413 | 592 | |
fcba0beb DM |
593 | sub parse_port_name_number_or_range { |
594 | my ($str) = @_; | |
595 | ||
596 | my $services = PVE::Firewall::get_etc_services(); | |
4cdbb3b7 | 597 | my $nbports = 0; |
fcba0beb | 598 | foreach my $item (split(/,/, $str)) { |
4cdbb3b7 | 599 | my $portlist = ""; |
35b66e9d | 600 | my $oldpon = undef; |
4b586518 | 601 | $nbports++; |
fcba0beb | 602 | foreach my $pon (split(':', $item, 2)) { |
35b66e9d | 603 | $pon = $services->{byname}->{$pon}->{port} if $services->{byname}->{$pon}->{port}; |
4cdbb3b7 | 604 | if ($pon =~ m/^\d+$/){ |
857f62c8 | 605 | die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535; |
35b66e9d AD |
606 | die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon); |
607 | $oldpon = $pon; | |
4cdbb3b7 AD |
608 | }else{ |
609 | die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon}; | |
610 | } | |
fcba0beb DM |
611 | } |
612 | } | |
613 | ||
4cdbb3b7 | 614 | return ($nbports); |
fcba0beb DM |
615 | } |
616 | ||
780bcc0f DM |
617 | my $bridge_firewall_enabled = 0; |
618 | ||
619 | sub enable_bridge_firewall { | |
620 | ||
621 | return if $bridge_firewall_enabled; # only once | |
622 | ||
623 | system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables"); | |
624 | system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-ip6tables"); | |
625 | ||
626 | $bridge_firewall_enabled = 1; | |
627 | } | |
628 | ||
8cebfa6f | 629 | my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n"; |
dddd9413 | 630 | |
3a616aa0 AD |
631 | sub iptables { |
632 | my ($cmd) = @_; | |
633 | ||
634 | run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {}); | |
635 | } | |
636 | ||
b16e818e DM |
637 | sub iptables_restore_cmdlist { |
638 | my ($cmdlist) = @_; | |
3a616aa0 | 639 | |
3fa83edf | 640 | run_command("/sbin/iptables-restore -n", input => $cmdlist); |
3a616aa0 AD |
641 | } |
642 | ||
de2a57cd DM |
643 | sub iptables_get_chains { |
644 | ||
645 | my $res = {}; | |
646 | ||
647 | # check what chains we want to track | |
648 | my $is_pvefw_chain = sub { | |
649 | my $name = shift; | |
650 | ||
dec84fcd DM |
651 | return 1 if $name =~ m/^PVEFW-\S+$/; |
652 | ||
de2a57cd | 653 | return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/; |
5927497d | 654 | return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT)$/; |
f50656c2 | 655 | return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/; |
de2a57cd DM |
656 | |
657 | return undef; | |
658 | }; | |
659 | ||
660 | my $table = ''; | |
661 | ||
de2a57cd DM |
662 | my $parser = sub { |
663 | my $line = shift; | |
664 | ||
665 | return if $line =~ m/^#/; | |
666 | return if $line =~ m/^\s*$/; | |
667 | ||
668 | if ($line =~ m/^\*(\S+)$/) { | |
669 | $table = $1; | |
670 | return; | |
671 | } | |
672 | ||
673 | return if $table ne 'filter'; | |
674 | ||
675 | if ($line =~ m/^:(\S+)\s/) { | |
676 | my $chain = $1; | |
677 | return if !&$is_pvefw_chain($chain); | |
3fa83edf | 678 | $res->{$chain} = "unknown"; |
09d5f68e | 679 | } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) { |
3fa83edf | 680 | my ($chain, $sig) = ($1, $2); |
de2a57cd | 681 | return if !&$is_pvefw_chain($chain); |
3fa83edf | 682 | $res->{$chain} = $sig; |
de2a57cd DM |
683 | } else { |
684 | # simply ignore the rest | |
685 | return; | |
686 | } | |
687 | }; | |
688 | ||
689 | run_command("/sbin/iptables-save", outfunc => $parser); | |
690 | ||
de2a57cd DM |
691 | return $res; |
692 | } | |
693 | ||
3a616aa0 AD |
694 | sub iptables_chain_exist { |
695 | my ($chain) = @_; | |
696 | ||
697 | eval{ | |
698 | iptables("-n --list $chain"); | |
699 | }; | |
700 | return undef if $@; | |
701 | ||
702 | return 1; | |
703 | } | |
704 | ||
705 | sub iptables_rule_exist { | |
706 | my ($rule) = @_; | |
707 | ||
708 | eval{ | |
709 | iptables("-C $rule"); | |
710 | }; | |
711 | return undef if $@; | |
712 | ||
713 | return 1; | |
714 | } | |
715 | ||
3fa83edf | 716 | sub ruleset_generate_rule { |
2f906466 | 717 | my ($ruleset, $chain, $rule, $actions, $goto) = @_; |
3a616aa0 | 718 | |
11bac5c2 DM |
719 | return if $rule->{disable}; |
720 | ||
3fa83edf | 721 | my $cmd = ''; |
3a616aa0 | 722 | |
d6de1dc2 | 723 | $cmd .= " -m iprange --src-range" if $rule->{nbsource} && $rule->{nbsource} > 1; |
3a616aa0 | 724 | $cmd .= " -s $rule->{source}" if $rule->{source}; |
d6de1dc2 | 725 | $cmd .= " -m iprange --dst-range" if $rule->{nbdest} && $rule->{nbdest} > 1; |
8c32a215 | 726 | $cmd .= " -d $rule->{dest}" if $rule->{dest}; |
4b586518 | 727 | |
181390b0 DM |
728 | if ($rule->{proto}) { |
729 | $cmd .= " -p $rule->{proto}"; | |
e3a1d391 | 730 | |
181390b0 DM |
731 | my $multiport = 0; |
732 | $multiport++ if $rule->{nbdport} && ($rule->{nbdport} > 1); | |
733 | $multiport++ if $rule->{nbsport} && ($rule->{nbsport} > 1); | |
e3a1d391 | 734 | |
181390b0 | 735 | $cmd .= " --match multiport" if $multiport; |
4b586518 | 736 | |
181390b0 DM |
737 | die "multiport: option '--sports' cannot be used together with '--dports'\n" |
738 | if ($multiport == 2) && ($rule->{dport} ne $rule->{sport}); | |
739 | ||
740 | if ($rule->{dport}) { | |
741 | if ($rule->{proto} && $rule->{proto} eq 'icmp') { | |
742 | # Note: we use dport to store --icmp-type | |
743 | die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}}); | |
744 | $cmd .= " -m icmp --icmp-type $rule->{dport}"; | |
745 | } else { | |
746 | if ($rule->{nbdport} && $rule->{nbdport} > 1) { | |
747 | if ($multiport == 2) { | |
748 | $cmd .= " --ports $rule->{dport}"; | |
749 | } else { | |
750 | $cmd .= " --dports $rule->{dport}"; | |
751 | } | |
e3a1d391 | 752 | } else { |
181390b0 | 753 | $cmd .= " --dport $rule->{dport}"; |
e3a1d391 | 754 | } |
4b586518 DM |
755 | } |
756 | } | |
4b586518 | 757 | |
181390b0 DM |
758 | if ($rule->{sport}) { |
759 | if ($rule->{nbsport} && $rule->{nbsport} > 1) { | |
760 | $cmd .= " --sports $rule->{sport}" if $multiport != 2; | |
761 | } else { | |
762 | $cmd .= " --sport $rule->{sport}"; | |
763 | } | |
4b586518 | 764 | } |
181390b0 DM |
765 | } elsif ($rule->{dport} || $rule->{sport}) { |
766 | warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport}; | |
767 | warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport}; | |
4b586518 DM |
768 | } |
769 | ||
770 | $cmd .= " -m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype}; | |
4e6112f9 DM |
771 | |
772 | if (my $action = $rule->{action}) { | |
2f906466 | 773 | $action = $actions->{$action} if defined($actions->{$action}); |
4e6112f9 DM |
774 | $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK'; |
775 | $cmd .= $goto ? " -g $action" : " -j $action"; | |
181390b0 | 776 | } |
3a616aa0 | 777 | |
3fa83edf DM |
778 | ruleset_addrule($ruleset, $chain, $cmd) if $cmd; |
779 | } | |
780 | ||
781 | sub ruleset_create_chain { | |
782 | my ($ruleset, $chain) = @_; | |
3a616aa0 | 783 | |
d050c724 DM |
784 | die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28; |
785 | ||
3fa83edf DM |
786 | die "chain '$chain' already exists\n" if $ruleset->{$chain}; |
787 | ||
788 | $ruleset->{$chain} = []; | |
3a616aa0 AD |
789 | } |
790 | ||
3fa83edf DM |
791 | sub ruleset_chain_exist { |
792 | my ($ruleset, $chain) = @_; | |
3a616aa0 | 793 | |
3fa83edf DM |
794 | return $ruleset->{$chain} ? 1 : undef; |
795 | } | |
3a616aa0 | 796 | |
3fa83edf DM |
797 | sub ruleset_addrule { |
798 | my ($ruleset, $chain, $rule) = @_; | |
3a616aa0 | 799 | |
3fa83edf | 800 | die "no such chain '$chain'\n" if !$ruleset->{$chain}; |
3a616aa0 | 801 | |
3fa83edf DM |
802 | push @{$ruleset->{$chain}}, "-A $chain $rule"; |
803 | } | |
3a616aa0 | 804 | |
3fa83edf DM |
805 | sub ruleset_insertrule { |
806 | my ($ruleset, $chain, $rule) = @_; | |
3a616aa0 | 807 | |
3fa83edf | 808 | die "no such chain '$chain'\n" if !$ruleset->{$chain}; |
3a616aa0 | 809 | |
3fa83edf DM |
810 | unshift @{$ruleset->{$chain}}, "-A $chain $rule"; |
811 | } | |
3a616aa0 | 812 | |
3fa83edf DM |
813 | sub generate_bridge_chains { |
814 | my ($ruleset, $bridge) = @_; | |
3a616aa0 | 815 | |
dec84fcd DM |
816 | if (!ruleset_chain_exist($ruleset, "PVEFW-FORWARD")){ |
817 | ruleset_create_chain($ruleset, "PVEFW-FORWARD"); | |
7fab95bc | 818 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT"); |
3a616aa0 AD |
819 | } |
820 | ||
5927497d DM |
821 | if (!ruleset_chain_exist($ruleset, "$bridge-FW")) { |
822 | ruleset_create_chain($ruleset, "$bridge-FW"); | |
823 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-bridged -j $bridge-FW"); | |
824 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-bridged -j $bridge-FW"); | |
9fcad984 AD |
825 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j DROP"); # disable interbridge routing |
826 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j DROP"); # disable interbridge routing | |
3fa83edf | 827 | } |
3a616aa0 | 828 | |
3fa83edf DM |
829 | if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) { |
830 | ruleset_create_chain($ruleset, "$bridge-OUT"); | |
5927497d | 831 | ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-in -j $bridge-OUT"); |
9fcad984 AD |
832 | } |
833 | ||
834 | if (!ruleset_chain_exist($ruleset, "$bridge-IN")) { | |
835 | ruleset_create_chain($ruleset, "$bridge-IN"); | |
5927497d | 836 | ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j $bridge-IN"); |
fdb0bf20 | 837 | ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT"); |
7323008d DM |
838 | # accept traffic to unmanaged bridge ports |
839 | ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j ACCEPT "); | |
3fa83edf DM |
840 | } |
841 | } | |
3a616aa0 AD |
842 | |
843 | sub generate_tap_rules_direction { | |
fa9c4a6f DM |
844 | my ($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, $direction) = @_; |
845 | ||
846 | my $rules = $vmfw_conf->{lc($direction)}; | |
847 | my $options = $vmfw_conf->{options}; | |
3a616aa0 AD |
848 | |
849 | my $tapchain = "$iface-$direction"; | |
850 | ||
3fa83edf | 851 | ruleset_create_chain($ruleset, $tapchain); |
3a616aa0 | 852 | |
bee633ab DM |
853 | if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) { |
854 | ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs"); | |
855 | } | |
856 | ||
ce15d90b DM |
857 | if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) { |
858 | ruleset_addrule($ruleset, $tapchain, "-p udp -m udp --dport 67:68 -j ACCEPT"); | |
859 | } | |
860 | ||
bee633ab DM |
861 | if ($options->{tcpflags}) { |
862 | ruleset_addrule($ruleset, $tapchain, "-p tcp -j PVEFW-tcpflags"); | |
863 | } | |
864 | ||
7fab95bc DM |
865 | ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate INVALID -j DROP"); |
866 | ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT"); | |
3a616aa0 | 867 | |
9c6b6efd DM |
868 | if ($direction eq 'OUT' && defined($macaddr) && |
869 | !(defined($options->{macfilter}) && $options->{macfilter} == 0)) { | |
c29f55c9 DM |
870 | ruleset_addrule($ruleset, $tapchain, "-m mac ! --mac-source $macaddr -j DROP"); |
871 | } | |
872 | ||
3fa83edf | 873 | if ($rules) { |
3a616aa0 AD |
874 | foreach my $rule (@$rules) { |
875 | next if $rule->{iface} && $rule->{iface} ne $netid; | |
bfbfa8b6 | 876 | # we go to $bridge-IN if accept in out rules |
3a616aa0 | 877 | if($rule->{action} =~ m/^(GROUP-(\S+))$/){ |
3fa83edf DM |
878 | $rule->{action} .= "-$direction"; |
879 | # generate empty group rule if don't exist | |
880 | if(!ruleset_chain_exist($ruleset, $rule->{action})){ | |
51bae274 | 881 | generate_group_rules($ruleset, $group_rules, $2); |
3fa83edf | 882 | } |
4e6112f9 | 883 | ruleset_generate_rule($ruleset, $tapchain, $rule); |
7b291cab | 884 | ruleset_addrule($ruleset, $tapchain, "-m mark --mark 1 -j RETURN") |
31ff3ef6 | 885 | if $direction eq 'OUT'; |
4e6112f9 | 886 | } else { |
2f906466 DM |
887 | if ($direction eq 'OUT') { |
888 | ruleset_generate_rule($ruleset, $tapchain, $rule, | |
889 | { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }); | |
890 | } else { | |
891 | ruleset_generate_rule($ruleset, $tapchain, $rule, { REJECT => "PVEFW-reject" }); | |
892 | } | |
3a616aa0 | 893 | } |
4e6112f9 | 894 | } |
3a616aa0 AD |
895 | } |
896 | ||
ccae0b50 DM |
897 | # implement policy |
898 | my $policy; | |
899 | ||
900 | if ($direction eq 'OUT') { | |
901 | $policy = $options->{'policy-out'} || 'ACCEPT'; # allow everything by default | |
902 | } else { | |
903 | $policy = $options->{'policy-in'} || 'DROP'; # allow everything by default | |
904 | } | |
905 | ||
906 | if ($policy eq 'ACCEPT') { | |
907 | if ($direction eq 'OUT') { | |
fdb0bf20 | 908 | ruleset_addrule($ruleset, $tapchain, "-g PVEFW-SET-ACCEPT-MARK"); |
ccae0b50 DM |
909 | } else { |
910 | ruleset_addrule($ruleset, $tapchain, "-j ACCEPT"); | |
911 | } | |
912 | } elsif ($policy eq 'DROP') { | |
25c7b224 | 913 | ruleset_addrule($ruleset, $tapchain, "-j PVEFW-Drop"); |
ccae0b50 DM |
914 | ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-dropped: \" --log-level 4"); |
915 | ruleset_addrule($ruleset, $tapchain, "-j DROP"); | |
916 | } elsif ($policy eq 'REJECT') { | |
25c7b224 | 917 | ruleset_addrule($ruleset, $tapchain, "-j PVEFW-Reject"); |
ccae0b50 | 918 | ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-reject: \" --log-level 4"); |
25c7b224 | 919 | ruleset_addrule($ruleset, $tapchain, "-g PVEFW-reject"); |
ccae0b50 DM |
920 | } else { |
921 | # should not happen | |
922 | die "internal error: unknown policy '$policy'"; | |
923 | } | |
3a616aa0 | 924 | |
3fa83edf DM |
925 | # plug the tap chain to bridge chain |
926 | my $physdevdirection = $direction eq 'IN' ? "out" : "in"; | |
927 | my $rule = "-m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain"; | |
928 | ruleset_insertrule($ruleset, "$bridge-$direction", $rule); | |
3a616aa0 | 929 | |
3fa83edf DM |
930 | if ($direction eq 'OUT'){ |
931 | # add tap->host rules | |
932 | my $rule = "-m physdev --physdev-$physdevdirection $iface -j $tapchain"; | |
dec84fcd | 933 | ruleset_addrule($ruleset, "PVEFW-INPUT", $rule); |
3a616aa0 AD |
934 | } |
935 | } | |
936 | ||
0bd5f137 | 937 | sub enablehostfw { |
51bae274 | 938 | my ($ruleset, $rules, $group_rules) = @_; |
0bd5f137 | 939 | |
51bae274 | 940 | # fixme: allow security groups |
0bd5f137 | 941 | |
3fa83edf | 942 | # host inbound firewall |
dec84fcd DM |
943 | my $chain = "PVEFW-HOST-IN"; |
944 | ruleset_create_chain($ruleset, $chain); | |
0bd5f137 | 945 | |
7fab95bc DM |
946 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP"); |
947 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT"); | |
dec84fcd DM |
948 | ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT"); |
949 | ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT"); | |
7fab95bc | 950 | ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT"); |
dec84fcd | 951 | ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync |
0bd5f137 | 952 | |
3fa83edf DM |
953 | if ($rules->{in}) { |
954 | foreach my $rule (@{$rules->{in}}) { | |
955 | # we use RETURN because we need to check also tap rules | |
2f906466 | 956 | ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => 'RETURN', REJECT => "PVEFW-reject" }); |
3fa83edf | 957 | } |
0bd5f137 AD |
958 | } |
959 | ||
dec84fcd DM |
960 | ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-IN dropped: \" --log-level 4"); |
961 | ruleset_addrule($ruleset, $chain, "-j DROP"); | |
0bd5f137 | 962 | |
3fa83edf | 963 | # host outbound firewall |
aadd745e | 964 | $chain = "PVEFW-HOST-OUT"; |
dec84fcd DM |
965 | ruleset_create_chain($ruleset, $chain); |
966 | ||
7fab95bc DM |
967 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP"); |
968 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT"); | |
dec84fcd DM |
969 | ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT"); |
970 | ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT"); | |
7fab95bc | 971 | ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT"); |
dec84fcd | 972 | ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync |
0bd5f137 | 973 | |
3fa83edf DM |
974 | if ($rules->{out}) { |
975 | foreach my $rule (@{$rules->{out}}) { | |
976 | # we use RETURN because we need to check also tap rules | |
2f906466 | 977 | ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => 'RETURN', REJECT => "PVEFW-reject" }); |
3fa83edf | 978 | } |
0bd5f137 AD |
979 | } |
980 | ||
dec84fcd DM |
981 | ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-OUT dropped: \" --log-level 4"); |
982 | ruleset_addrule($ruleset, $chain, "-j DROP"); | |
6158271d | 983 | |
dec84fcd DM |
984 | ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT"); |
985 | ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN"); | |
9d31b418 AD |
986 | } |
987 | ||
988 | sub generate_group_rules { | |
51bae274 | 989 | my ($ruleset, $group_rules, $group) = @_; |
9d31b418 | 990 | |
51bae274 | 991 | my $rules = $group_rules->{$group}; |
9d31b418 | 992 | |
51bae274 | 993 | die "no such security group '$group'\n" if !$rules; |
6158271d | 994 | |
3fa83edf | 995 | my $chain = "GROUP-${group}-IN"; |
9d31b418 | 996 | |
3fa83edf | 997 | ruleset_create_chain($ruleset, $chain); |
9d31b418 | 998 | |
3fa83edf DM |
999 | if ($rules->{in}) { |
1000 | foreach my $rule (@{$rules->{in}}) { | |
2f906466 | 1001 | ruleset_generate_rule($ruleset, $chain, $rule, { REJECT => "PVEFW-reject" }); |
9d31b418 AD |
1002 | } |
1003 | } | |
1004 | ||
3fa83edf | 1005 | $chain = "GROUP-${group}-OUT"; |
9d31b418 | 1006 | |
3fa83edf | 1007 | ruleset_create_chain($ruleset, $chain); |
4e6112f9 | 1008 | ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark |
9d31b418 | 1009 | |
3fa83edf DM |
1010 | if ($rules->{out}) { |
1011 | foreach my $rule (@{$rules->{out}}) { | |
2f906466 DM |
1012 | # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to |
1013 | # check also other tap rules later | |
1014 | ruleset_generate_rule($ruleset, $chain, $rule, | |
1015 | { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }); | |
9d31b418 AD |
1016 | } |
1017 | } | |
9d31b418 AD |
1018 | } |
1019 | ||
51bae274 DM |
1020 | my $MAX_NETS = 32; |
1021 | my $valid_netdev_names = {}; | |
1022 | for (my $i = 0; $i < $MAX_NETS; $i++) { | |
1023 | $valid_netdev_names->{"net$i"} = 1; | |
1024 | } | |
5e1267a5 | 1025 | |
51bae274 DM |
1026 | sub parse_fw_rule { |
1027 | my ($line, $need_iface, $allow_groups) = @_; | |
5e1267a5 | 1028 | |
a332200b | 1029 | my $macros = get_firewall_macros(); |
fcba0beb | 1030 | my $protocols = get_etc_protocols(); |
51bae274 DM |
1031 | |
1032 | my ($action, $iface, $source, $dest, $proto, $dport, $sport); | |
1033 | ||
11bac5c2 DM |
1034 | # we can add single line comments to the end of the rule |
1035 | my $comment = $1 if $line =~ s/#\s*(.*?)\s*$//; | |
1036 | ||
1037 | # we can disable a rule when prefixed with '|' | |
1038 | my $disable = 1 if $line =~ s/^\|//; | |
51bae274 DM |
1039 | |
1040 | my @data = split(/\s+/, $line); | |
1041 | my $expected_elements = $need_iface ? 7 : 6; | |
1042 | ||
1043 | die "wrong number of rule elements\n" if scalar(@data) > $expected_elements; | |
1044 | ||
1045 | if ($need_iface) { | |
1046 | ($action, $iface, $source, $dest, $proto, $dport, $sport) = @data | |
1047 | } else { | |
1048 | ($action, $source, $dest, $proto, $dport, $sport) = @data; | |
1049 | } | |
1050 | ||
1051 | die "incomplete rule\n" if !$action; | |
1052 | ||
961b4928 DM |
1053 | my $macro; |
1054 | my $macro_name; | |
1055 | ||
51bae274 DM |
1056 | if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) { |
1057 | # OK | |
1058 | } elsif ($allow_groups && $action =~ m/^GROUP-(:?\S+)$/) { | |
1059 | # OK | |
1060 | } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) { | |
961b4928 DM |
1061 | ($macro_name, $action) = ($1, $2); |
1062 | my $lc_macro_name = lc($macro_name); | |
1063 | my $preferred_name = $pve_fw_preferred_macro_names->{$lc_macro_name}; | |
1064 | $macro_name = $preferred_name if $preferred_name; | |
1065 | $macro = $macros->{$lc_macro_name}; | |
1066 | die "unknown macro '$macro_name'\n" if !$macro; | |
51bae274 DM |
1067 | } else { |
1068 | die "unknown action '$action'\n"; | |
1069 | } | |
1070 | ||
1071 | if ($need_iface) { | |
1072 | $iface = undef if $iface && $iface eq '-'; | |
6158271d | 1073 | die "unknown interface '$iface'\n" |
51bae274 DM |
1074 | if defined($iface) && !$valid_netdev_names->{$iface}; |
1075 | } | |
1076 | ||
1077 | $proto = undef if $proto && $proto eq '-'; | |
6158271d | 1078 | die "unknown protokol '$proto'\n" if $proto && |
51bae274 DM |
1079 | !(defined($protocols->{byname}->{$proto}) || |
1080 | defined($protocols->{byid}->{$proto})); | |
1081 | ||
1082 | $source = undef if $source && $source eq '-'; | |
1083 | $dest = undef if $dest && $dest eq '-'; | |
1084 | ||
1085 | $dport = undef if $dport && $dport eq '-'; | |
1086 | $sport = undef if $sport && $sport eq '-'; | |
1087 | ||
51bae274 DM |
1088 | my $nbsource = undef; |
1089 | my $nbdest = undef; | |
1090 | ||
1091 | $nbsource = parse_address_list($source) if $source; | |
1092 | $nbdest = parse_address_list($dest) if $dest; | |
6158271d | 1093 | |
961b4928 | 1094 | my $rules = []; |
51bae274 | 1095 | |
961b4928 | 1096 | my $param = { |
11bac5c2 DM |
1097 | disable => $disable, |
1098 | comment => $comment, | |
51bae274 | 1099 | action => $action, |
51bae274 DM |
1100 | iface => $iface, |
1101 | source => $source, | |
1102 | dest => $dest, | |
1103 | nbsource => $nbsource, | |
1104 | nbdest => $nbdest, | |
1105 | proto => $proto, | |
1106 | dport => $dport, | |
1107 | sport => $sport, | |
51bae274 | 1108 | }; |
961b4928 DM |
1109 | |
1110 | if ($macro) { | |
1111 | foreach my $templ (@$macro) { | |
1112 | my $rule = {}; | |
faf7be7e | 1113 | my $param_used = {}; |
961b4928 DM |
1114 | foreach my $k (keys %$templ) { |
1115 | my $v = $templ->{$k}; | |
857f62c8 DM |
1116 | if ($v eq 'PARAM') { |
1117 | $v = $param->{$k}; | |
faf7be7e | 1118 | $param_used->{$k} = 1; |
857f62c8 DM |
1119 | } elsif ($v eq 'DEST') { |
1120 | $v = $param->{dest}; | |
faf7be7e | 1121 | $param_used->{dest} = 1; |
857f62c8 DM |
1122 | } elsif ($v eq 'SOURCE') { |
1123 | $v = $param->{source}; | |
faf7be7e | 1124 | $param_used->{source} = 1; |
857f62c8 DM |
1125 | } |
1126 | ||
961b4928 DM |
1127 | die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v); |
1128 | $rule->{$k} = $v; | |
1129 | } | |
faf7be7e DM |
1130 | foreach my $k (keys %$param) { |
1131 | next if !defined($param->{$k}); | |
1132 | next if $param_used->{$k}; | |
1133 | if (defined($rule->{$k})) { | |
1134 | die "parameter '$k' already define in macro (value = '$rule->{$k}')\n" | |
1135 | if $rule->{$k} ne $param->{$k}; | |
1136 | } else { | |
1137 | $rule->{$k} = $param->{$k}; | |
1138 | } | |
1139 | } | |
961b4928 DM |
1140 | push @$rules, $rule; |
1141 | } | |
1142 | } else { | |
1143 | push @$rules, $param; | |
1144 | } | |
1145 | ||
1146 | foreach my $rule (@$rules) { | |
6158271d | 1147 | $rule->{nbdport} = parse_port_name_number_or_range($rule->{dport}) |
961b4928 | 1148 | if defined($rule->{dport}); |
6158271d | 1149 | $rule->{nbsport} = parse_port_name_number_or_range($rule->{sport}) |
961b4928 DM |
1150 | if defined($rule->{sport}); |
1151 | } | |
1152 | ||
1153 | return $rules; | |
51bae274 DM |
1154 | } |
1155 | ||
85c6eaed DM |
1156 | sub parse_fw_option { |
1157 | my ($line) = @_; | |
1158 | ||
1159 | my ($opt, $value); | |
1160 | ||
ce15d90b | 1161 | if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags):\s*(0|1)\s*$/i) { |
9c6b6efd DM |
1162 | $opt = lc($1); |
1163 | $value = int($2); | |
85c6eaed DM |
1164 | } elsif ($line =~ m/^(policy-(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) { |
1165 | $opt = lc($1); | |
1166 | $value = uc($3); | |
9c6b6efd | 1167 | } else { |
85c6eaed DM |
1168 | chomp $line; |
1169 | die "can't parse option '$line'\n" | |
1170 | } | |
1171 | ||
1172 | return ($opt, $value); | |
1173 | } | |
1174 | ||
51bae274 DM |
1175 | sub parse_vm_fw_rules { |
1176 | my ($filename, $fh) = @_; | |
1177 | ||
85c6eaed | 1178 | my $res = { in => [], out => [], options => {}}; |
51bae274 DM |
1179 | |
1180 | my $section; | |
1181 | ||
5e1267a5 DM |
1182 | while (defined(my $line = <$fh>)) { |
1183 | next if $line =~ m/^#/; | |
1184 | next if $line =~ m/^\s*$/; | |
1185 | ||
961b4928 DM |
1186 | my $linenr = $fh->input_line_number(); |
1187 | my $prefix = "$filename (line $linenr)"; | |
1188 | ||
85c6eaed | 1189 | if ($line =~ m/^\[(\S+)\]\s*$/i) { |
5e1267a5 | 1190 | $section = lc($1); |
85c6eaed | 1191 | warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section}; |
5e1267a5 DM |
1192 | next; |
1193 | } | |
51bae274 | 1194 | if (!$section) { |
961b4928 | 1195 | warn "$prefix: skip line - no section"; |
5e1267a5 DM |
1196 | next; |
1197 | } | |
1198 | ||
85c6eaed DM |
1199 | next if !$res->{$section}; # skip undefined section |
1200 | ||
1201 | if ($section eq 'options') { | |
6158271d DM |
1202 | eval { |
1203 | my ($opt, $value) = parse_fw_option($line); | |
85c6eaed DM |
1204 | $res->{options}->{$opt} = $value; |
1205 | }; | |
1206 | warn "$prefix: $@" if $@; | |
1207 | next; | |
1208 | } | |
1209 | ||
961b4928 DM |
1210 | my $rules; |
1211 | eval { $rules = parse_fw_rule($line, 1, 1); }; | |
51bae274 | 1212 | if (my $err = $@) { |
961b4928 | 1213 | warn "$prefix: $err"; |
5e1267a5 DM |
1214 | next; |
1215 | } | |
1216 | ||
961b4928 | 1217 | push @{$res->{$section}}, @$rules; |
51bae274 DM |
1218 | } |
1219 | ||
1220 | return $res; | |
1221 | } | |
1222 | ||
1223 | sub parse_host_fw_rules { | |
1224 | my ($filename, $fh) = @_; | |
1225 | ||
1226 | my $res = { in => [], out => [] }; | |
1227 | ||
1228 | my $section; | |
1229 | ||
1230 | while (defined(my $line = <$fh>)) { | |
1231 | next if $line =~ m/^#/; | |
1232 | next if $line =~ m/^\s*$/; | |
1233 | ||
961b4928 DM |
1234 | my $linenr = $fh->input_line_number(); |
1235 | my $prefix = "$filename (line $linenr)"; | |
1236 | ||
51bae274 DM |
1237 | if ($line =~ m/^\[(in|out)\]\s*$/i) { |
1238 | $section = lc($1); | |
5e1267a5 DM |
1239 | next; |
1240 | } | |
51bae274 | 1241 | if (!$section) { |
961b4928 | 1242 | warn "$prefix: skip line - no section"; |
5e1267a5 DM |
1243 | next; |
1244 | } | |
1245 | ||
961b4928 DM |
1246 | my $rules; |
1247 | eval { $rules = parse_fw_rule($line, 1, 1); }; | |
ecbea048 | 1248 | if (my $err = $@) { |
961b4928 | 1249 | warn "$prefix: $err"; |
ecbea048 | 1250 | next; |
ecbea048 DM |
1251 | } |
1252 | ||
961b4928 | 1253 | push @{$res->{$section}}, @$rules; |
51bae274 | 1254 | } |
ecbea048 | 1255 | |
51bae274 DM |
1256 | return $res; |
1257 | } | |
4cdbb3b7 | 1258 | |
51bae274 DM |
1259 | sub parse_group_fw_rules { |
1260 | my ($filename, $fh) = @_; | |
5e1267a5 | 1261 | |
51bae274 DM |
1262 | my $section; |
1263 | my $group; | |
1264 | ||
1265 | my $res = { in => [], out => [] }; | |
6158271d | 1266 | |
51bae274 DM |
1267 | while (defined(my $line = <$fh>)) { |
1268 | next if $line =~ m/^#/; | |
1269 | next if $line =~ m/^\s*$/; | |
1270 | ||
961b4928 DM |
1271 | my $linenr = $fh->input_line_number(); |
1272 | my $prefix = "$filename (line $linenr)"; | |
1273 | ||
51bae274 DM |
1274 | if ($line =~ m/^\[(in|out):(\S+)\]\s*$/i) { |
1275 | $section = lc($1); | |
1276 | $group = lc($2); | |
1277 | next; | |
1278 | } | |
1279 | if (!$section || !$group) { | |
961b4928 | 1280 | warn "$prefix: skip line - no section"; |
51bae274 DM |
1281 | next; |
1282 | } | |
1283 | ||
961b4928 DM |
1284 | my $rules; |
1285 | eval { $rules = parse_fw_rule($line, 0, 0); }; | |
51bae274 | 1286 | if (my $err = $@) { |
961b4928 | 1287 | warn "$prefix: $err"; |
51bae274 DM |
1288 | next; |
1289 | } | |
1290 | ||
961b4928 | 1291 | push @{$res->{$group}->{$section}}, @$rules; |
5e1267a5 DM |
1292 | } |
1293 | ||
1294 | return $res; | |
1295 | } | |
1296 | ||
06320eb0 DM |
1297 | sub run_locked { |
1298 | my ($code, @param) = @_; | |
1299 | ||
1300 | my $timeout = 10; | |
1301 | ||
1302 | my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param); | |
1303 | ||
1304 | die $@ if $@; | |
1305 | ||
1306 | return $res; | |
1307 | } | |
1308 | ||
5e1267a5 DM |
1309 | sub read_local_vm_config { |
1310 | ||
1311 | my $openvz = {}; | |
1312 | ||
1313 | my $qemu = {}; | |
1314 | ||
1315 | my $list = PVE::QemuServer::config_list(); | |
1316 | ||
1317 | foreach my $vmid (keys %$list) { | |
5e1267a5 DM |
1318 | my $cfspath = PVE::QemuServer::cfs_config_path($vmid); |
1319 | if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) { | |
1320 | $qemu->{$vmid} = $conf; | |
1321 | } | |
1322 | } | |
1323 | ||
1324 | my $vmdata = { openvz => $openvz, qemu => $qemu }; | |
1325 | ||
1326 | return $vmdata; | |
1327 | }; | |
1328 | ||
1329 | sub read_vm_firewall_rules { | |
1330 | my ($vmdata) = @_; | |
1331 | my $rules = {}; | |
1332 | foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) { | |
1333 | my $filename = "/etc/pve/firewall/$vmid.fw"; | |
1334 | my $fh = IO::File->new($filename, O_RDONLY); | |
1335 | next if !$fh; | |
1336 | ||
51bae274 | 1337 | $rules->{$vmid} = parse_vm_fw_rules($filename, $fh); |
5e1267a5 DM |
1338 | } |
1339 | ||
1340 | return $rules; | |
1341 | } | |
1342 | ||
d8f2505e DM |
1343 | sub generate_std_chains { |
1344 | my ($ruleset) = @_; | |
1345 | ||
1346 | foreach my $chain (keys %$pve_std_chains) { | |
1347 | ruleset_create_chain($ruleset, $chain); | |
1348 | foreach my $rule (@{$pve_std_chains->{$chain}}) { | |
1349 | if (ref($rule)) { | |
1350 | ruleset_generate_rule($ruleset, $chain, $rule); | |
1351 | } else { | |
1352 | ruleset_addrule($ruleset, $chain, $rule); | |
1353 | } | |
1354 | } | |
1355 | } | |
1356 | } | |
1357 | ||
6b9f68a2 DM |
1358 | sub save_pvefw_status { |
1359 | my ($status) = @_; | |
1360 | ||
1361 | die "unknown status '$status' - internal error" | |
1362 | if $status !~ m/^(stopped|active)$/; | |
1363 | ||
1364 | mkdir dirname($pve_fw_status_filename); | |
1365 | PVE::Tools::file_set_contents($pve_fw_status_filename, $status); | |
1366 | } | |
1367 | ||
1368 | sub read_pvefw_status { | |
1369 | ||
1370 | my $status = 'unknown'; | |
1371 | ||
1372 | return 'stopped' if ! -f $pve_fw_status_filename; | |
1373 | ||
1374 | eval { | |
1375 | $status = PVE::Tools::file_get_contents($pve_fw_status_filename); | |
1376 | }; | |
1377 | warn $@ if $@; | |
1378 | ||
1379 | return $status; | |
1380 | } | |
1381 | ||
5e1267a5 | 1382 | sub compile { |
5e1267a5 DM |
1383 | my $vmdata = read_local_vm_config(); |
1384 | my $rules = read_vm_firewall_rules($vmdata); | |
6158271d | 1385 | |
51bae274 DM |
1386 | my $group_rules = {}; |
1387 | my $filename = "/etc/pve/firewall/groups.fw"; | |
1388 | if (my $fh = IO::File->new($filename, O_RDONLY)) { | |
1389 | $group_rules = parse_group_fw_rules($filename, $fh); | |
1390 | } | |
5e1267a5 | 1391 | |
3fa83edf DM |
1392 | #print Dumper($rules); |
1393 | ||
1394 | my $ruleset = {}; | |
1395 | ||
dec84fcd DM |
1396 | ruleset_create_chain($ruleset, "PVEFW-INPUT"); |
1397 | ruleset_create_chain($ruleset, "PVEFW-OUTPUT"); | |
fadb13dd | 1398 | ruleset_create_chain($ruleset, "PVEFW-FORWARD"); |
3fa83edf | 1399 | |
d8f2505e | 1400 | generate_std_chains($ruleset); |
4e6112f9 | 1401 | |
fadb13dd | 1402 | my $enable_hostfw = 0; |
51bae274 DM |
1403 | $filename = "/etc/pve/local/host.fw"; |
1404 | if (my $fh = IO::File->new($filename, O_RDONLY)) { | |
1405 | my $host_rules = parse_host_fw_rules($filename, $fh); | |
fadb13dd DM |
1406 | |
1407 | $enable_hostfw = 1; | |
1408 | ||
51bae274 DM |
1409 | enablehostfw($ruleset, $host_rules, $group_rules); |
1410 | } | |
3fa83edf | 1411 | |
6158271d | 1412 | # generate firewall rules for QEMU VMs |
3fa83edf DM |
1413 | foreach my $vmid (keys %{$vmdata->{qemu}}) { |
1414 | my $conf = $vmdata->{qemu}->{$vmid}; | |
fa9c4a6f DM |
1415 | my $vmfw_conf = $rules->{$vmid}; |
1416 | next if !$vmfw_conf; | |
1417 | next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0); | |
3fa83edf DM |
1418 | |
1419 | foreach my $netid (keys %$conf) { | |
1420 | next if $netid !~ m/^net(\d+)$/; | |
1421 | my $net = PVE::QemuServer::parse_net($conf->{$netid}); | |
1422 | next if !$net; | |
1423 | my $iface = "tap${vmid}i$1"; | |
5e1267a5 | 1424 | |
3fa83edf DM |
1425 | my $bridge = $net->{bridge}; |
1426 | next if !$bridge; # fixme: ? | |
1427 | ||
1428 | $bridge .= "v$net->{tag}" if $net->{tag}; | |
1429 | ||
fadb13dd | 1430 | |
3fa83edf DM |
1431 | generate_bridge_chains($ruleset, $bridge); |
1432 | ||
c29f55c9 | 1433 | my $macaddr = $net->{macaddr}; |
fa9c4a6f DM |
1434 | generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'IN'); |
1435 | generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'OUT'); | |
3fa83edf DM |
1436 | } |
1437 | } | |
c0413e35 | 1438 | |
fadb13dd DM |
1439 | if ($enable_hostfw) { |
1440 | # allow traffic from lo (ourself) | |
1441 | ruleset_addrule($ruleset, "PVEFW-INPUT", "-i lo -j ACCEPT"); | |
1442 | } | |
c0413e35 | 1443 | |
3fa83edf DM |
1444 | return $ruleset; |
1445 | } | |
1446 | ||
1447 | sub get_ruleset_status { | |
1448 | my ($ruleset, $verbose) = @_; | |
1449 | ||
1450 | my $active_chains = iptables_get_chains(); | |
1451 | ||
1452 | my $statushash = {}; | |
1453 | ||
1454 | foreach my $chain (sort keys %$ruleset) { | |
09d5f68e | 1455 | my $digest = Digest::SHA->new('sha1'); |
3fa83edf DM |
1456 | foreach my $cmd (@{$ruleset->{$chain}}) { |
1457 | $digest->add("$cmd\n"); | |
1458 | } | |
1459 | my $sig = $digest->b64digest; | |
1460 | $statushash->{$chain}->{sig} = $sig; | |
1461 | ||
1462 | my $oldsig = $active_chains->{$chain}; | |
1463 | if (!defined($oldsig)) { | |
1464 | $statushash->{$chain}->{action} = 'create'; | |
1465 | } else { | |
1466 | if ($oldsig eq $sig) { | |
1467 | $statushash->{$chain}->{action} = 'exists'; | |
1468 | } else { | |
1469 | $statushash->{$chain}->{action} = 'update'; | |
1470 | } | |
1471 | } | |
1472 | print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose; | |
1473 | foreach my $cmd (@{$ruleset->{$chain}}) { | |
1474 | print "\t$cmd\n" if $verbose; | |
1475 | } | |
1476 | } | |
1477 | ||
1478 | foreach my $chain (sort keys %$active_chains) { | |
1479 | if (!defined($ruleset->{$chain})) { | |
1480 | my $sig = $active_chains->{$chain}; | |
1481 | $statushash->{$chain}->{action} = 'delete'; | |
1482 | $statushash->{$chain}->{sig} = $sig; | |
1483 | print "delete $chain ($sig)\n" if $verbose; | |
1484 | } | |
6158271d | 1485 | } |
3fa83edf DM |
1486 | |
1487 | return $statushash; | |
1488 | } | |
1489 | ||
1490 | sub print_ruleset { | |
1491 | my ($ruleset) = @_; | |
1492 | ||
1493 | get_ruleset_status($ruleset, 1); | |
1494 | } | |
1495 | ||
1496 | sub print_sig_rule { | |
1497 | my ($chain, $sig) = @_; | |
1498 | ||
09d5f68e DM |
1499 | # We just use this to store a SHA1 checksum used to detect changes |
1500 | return "-A $chain -m comment --comment \"PVESIG:$sig\"\n"; | |
b6360c3f DM |
1501 | } |
1502 | ||
6b9f68a2 | 1503 | sub get_rulset_cmdlist { |
a84f4d96 | 1504 | my ($ruleset, $verbose) = @_; |
3fa83edf | 1505 | |
3fa83edf DM |
1506 | my $cmdlist = "*filter\n"; # we pass this to iptables-restore; |
1507 | ||
1508 | my $statushash = get_ruleset_status($ruleset, $verbose); | |
1509 | ||
1510 | # create missing chains first | |
1511 | foreach my $chain (sort keys %$ruleset) { | |
1512 | my $stat = $statushash->{$chain}; | |
1513 | die "internal error" if !$stat; | |
1514 | next if $stat->{action} ne 'create'; | |
886aba9c | 1515 | |
3fa83edf DM |
1516 | $cmdlist .= ":$chain - [0:0]\n"; |
1517 | } | |
1518 | ||
dec84fcd | 1519 | my $rule = "INPUT -j PVEFW-INPUT"; |
3fa83edf DM |
1520 | if (!PVE::Firewall::iptables_rule_exist($rule)) { |
1521 | $cmdlist .= "-A $rule\n"; | |
1522 | } | |
dec84fcd | 1523 | $rule = "OUTPUT -j PVEFW-OUTPUT"; |
3fa83edf DM |
1524 | if (!PVE::Firewall::iptables_rule_exist($rule)) { |
1525 | $cmdlist .= "-A $rule\n"; | |
1526 | } | |
1527 | ||
dec84fcd | 1528 | $rule = "FORWARD -j PVEFW-FORWARD"; |
3fa83edf DM |
1529 | if (!PVE::Firewall::iptables_rule_exist($rule)) { |
1530 | $cmdlist .= "-A $rule\n"; | |
1531 | } | |
1532 | ||
1533 | foreach my $chain (sort keys %$ruleset) { | |
1534 | my $stat = $statushash->{$chain}; | |
1535 | die "internal error" if !$stat; | |
1536 | ||
1537 | if ($stat->{action} eq 'update' || $stat->{action} eq 'create') { | |
1538 | $cmdlist .= "-F $chain\n"; | |
1539 | foreach my $cmd (@{$ruleset->{$chain}}) { | |
1540 | $cmdlist .= "$cmd\n"; | |
1541 | } | |
1542 | $cmdlist .= print_sig_rule($chain, $stat->{sig}); | |
1543 | } elsif ($stat->{action} eq 'delete') { | |
f5d28682 | 1544 | die "internal error"; # this should not happen |
3fa83edf DM |
1545 | } elsif ($stat->{action} eq 'exists') { |
1546 | # do nothing | |
1547 | } else { | |
1548 | die "internal error - unknown status '$stat->{action}'"; | |
1549 | } | |
1550 | } | |
1551 | ||
f5d28682 DM |
1552 | foreach my $chain (keys %$statushash) { |
1553 | next if $statushash->{$chain}->{action} ne 'delete'; | |
1554 | $cmdlist .= "-F $chain\n"; | |
1555 | } | |
1556 | foreach my $chain (keys %$statushash) { | |
1557 | next if $statushash->{$chain}->{action} ne 'delete'; | |
fadb13dd DM |
1558 | next if $chain eq 'PVEFW-INPUT'; |
1559 | next if $chain eq 'PVEFW-OUTPUT'; | |
1560 | next if $chain eq 'PVEFW-FORWARD'; | |
f5d28682 DM |
1561 | $cmdlist .= "-X $chain\n"; |
1562 | } | |
1563 | ||
3fa83edf DM |
1564 | $cmdlist .= "COMMIT\n"; |
1565 | ||
6b9f68a2 DM |
1566 | return $cmdlist; |
1567 | } | |
1568 | ||
1569 | sub apply_ruleset { | |
1570 | my ($ruleset, $verbose) = @_; | |
1571 | ||
1572 | enable_bridge_firewall(); | |
1573 | ||
1574 | my $cmdlist = get_rulset_cmdlist($ruleset, $verbose); | |
1575 | ||
3fa83edf DM |
1576 | print $cmdlist if $verbose; |
1577 | ||
1578 | iptables_restore_cmdlist($cmdlist); | |
1579 | ||
6158271d | 1580 | # test: re-read status and check if everything is up to date |
6b9f68a2 | 1581 | my $statushash = get_ruleset_status($ruleset); |
3fa83edf DM |
1582 | |
1583 | my $errors; | |
1584 | foreach my $chain (sort keys %$ruleset) { | |
1585 | my $stat = $statushash->{$chain}; | |
1586 | if ($stat->{action} ne 'exists') { | |
1587 | warn "unable to update chain '$chain'\n"; | |
1588 | $errors = 1; | |
1589 | } | |
1590 | } | |
b6360c3f | 1591 | |
3fa83edf | 1592 | die "unable to apply firewall changes\n" if $errors; |
b6360c3f DM |
1593 | } |
1594 | ||
6b9f68a2 DM |
1595 | sub update { |
1596 | my ($start, $verbose) = @_; | |
1597 | ||
1598 | my $code = sub { | |
1599 | my $status = read_pvefw_status(); | |
1600 | ||
1601 | my $ruleset = PVE::Firewall::compile(); | |
1602 | ||
1603 | if ($start || $status eq 'active') { | |
1604 | ||
1605 | save_pvefw_status('active') if ($status ne 'active'); | |
1606 | ||
1607 | PVE::Firewall::apply_ruleset($ruleset, $verbose); | |
1608 | } else { | |
1609 | print "Firewall not active (status = $status)\n" if $verbose; | |
1610 | } | |
1611 | }; | |
1612 | ||
1613 | run_locked($code); | |
1614 | } | |
1615 | ||
1616 | ||
b6360c3f | 1617 | 1; |