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1 | package PVE::Firewall; | |
2 | ||
3 | use warnings; | |
4 | use strict; | |
5 | use POSIX; | |
6 | use Data::Dumper; | |
7 | use Digest::SHA; | |
8 | use PVE::INotify; | |
9 | use PVE::Exception qw(raise raise_param_exc); | |
10 | use PVE::JSONSchema qw(register_standard_option get_standard_option); | |
11 | use PVE::Cluster; | |
12 | use PVE::ProcFSTools; | |
13 | use PVE::Tools qw($IPV4RE); | |
14 | use File::Basename; | |
15 | use File::Path; | |
16 | use IO::File; | |
17 | use Net::IP; | |
18 | use PVE::Tools qw(run_command lock_file); | |
19 | use Encode; | |
20 | ||
21 | my $hostfw_conf_filename = "/etc/pve/local/host.fw"; | |
22 | my $clusterfw_conf_filename = "/etc/pve/firewall/cluster.fw"; | |
23 | ||
24 | # dynamically include PVE::QemuServer and PVE::OpenVZ | |
25 | # to avoid dependency problems | |
26 | my $have_qemu_server; | |
27 | eval { | |
28 | require PVE::QemuServer; | |
29 | $have_qemu_server = 1; | |
30 | }; | |
31 | ||
32 | my $have_pve_manager; | |
33 | eval { | |
34 | require PVE::OpenVZ; | |
35 | $have_pve_manager = 1; | |
36 | }; | |
37 | ||
38 | PVE::JSONSchema::register_format('IPv4orCIDR', \&pve_verify_ipv4_or_cidr); | |
39 | sub pve_verify_ipv4_or_cidr { | |
40 | my ($cidr, $noerr) = @_; | |
41 | ||
42 | if ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) { | |
43 | return $cidr if Net::IP->new($cidr); | |
44 | return undef if $noerr; | |
45 | die Net::IP::Error() . "\n"; | |
46 | } | |
47 | return undef if $noerr; | |
48 | die "value does not look like a valid IP address or CIDR network\n"; | |
49 | } | |
50 | ||
51 | PVE::JSONSchema::register_standard_option('ipset-name', { | |
52 | description => "IP set name.", | |
53 | type => 'string', | |
54 | pattern => '[A-Za-z][A-Za-z0-9\-\_]+', | |
55 | minLength => 2, | |
56 | maxLength => 20, | |
57 | }); | |
58 | ||
59 | my $security_group_pattern = '[A-Za-z][A-Za-z0-9\-\_]+'; | |
60 | ||
61 | PVE::JSONSchema::register_standard_option('pve-security-group-name', { | |
62 | description => "Security Group name.", | |
63 | type => 'string', | |
64 | pattern => $security_group_pattern, | |
65 | minLength => 2, | |
66 | maxLength => 20, | |
67 | }); | |
68 | ||
69 | my $feature_ipset_nomatch = 0; | |
70 | eval { | |
71 | my (undef, undef, $release) = POSIX::uname(); | |
72 | if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) { | |
73 | my ($major, $minor) = ($1, $2); | |
74 | $feature_ipset_nomatch = 1 if ($major > 3) || | |
75 | ($major == 3 && $minor >= 7); | |
76 | } | |
77 | ||
78 | }; | |
79 | ||
80 | use Data::Dumper; | |
81 | ||
82 | my $nodename = PVE::INotify::nodename(); | |
83 | ||
84 | my $pve_fw_lock_filename = "/var/lock/pvefw.lck"; | |
85 | my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status"; | |
86 | ||
87 | my $default_log_level = 'info'; | |
88 | ||
89 | my $log_level_hash = { | |
90 | debug => 7, | |
91 | info => 6, | |
92 | notice => 5, | |
93 | warning => 4, | |
94 | err => 3, | |
95 | crit => 2, | |
96 | alert => 1, | |
97 | emerg => 0, | |
98 | }; | |
99 | ||
100 | # imported/converted from: /usr/share/shorewall/macro.* | |
101 | my $pve_fw_macros = { | |
102 | 'Amanda' => [ | |
103 | "Amanda Backup", | |
104 | { action => 'PARAM', proto => 'udp', dport => '10080' }, | |
105 | { action => 'PARAM', proto => 'tcp', dport => '10080' }, | |
106 | ], | |
107 | 'Auth' => [ | |
108 | "Auth (identd) traffic", | |
109 | { action => 'PARAM', proto => 'tcp', dport => '113' }, | |
110 | ], | |
111 | 'BGP' => [ | |
112 | "Border Gateway Protocol traffic", | |
113 | { action => 'PARAM', proto => 'tcp', dport => '179' }, | |
114 | ], | |
115 | 'BitTorrent' => [ | |
116 | "BitTorrent traffic for BitTorrent 3.1 and earlier", | |
117 | { action => 'PARAM', proto => 'tcp', dport => '6881:6889' }, | |
118 | { action => 'PARAM', proto => 'udp', dport => '6881' }, | |
119 | ], | |
120 | 'BitTorrent32' => [ | |
121 | "BitTorrent traffic for BitTorrent 3.2 and later", | |
122 | { action => 'PARAM', proto => 'tcp', dport => '6881:6999' }, | |
123 | { action => 'PARAM', proto => 'udp', dport => '6881' }, | |
124 | ], | |
125 | 'CVS' => [ | |
126 | "Concurrent Versions System pserver traffic", | |
127 | { action => 'PARAM', proto => 'tcp', dport => '2401' }, | |
128 | ], | |
129 | 'Citrix' => [ | |
130 | "Citrix/ICA traffic (ICA, ICA Browser, CGP)", | |
131 | { action => 'PARAM', proto => 'tcp', dport => '1494' }, | |
132 | { action => 'PARAM', proto => 'udp', dport => '1604' }, | |
133 | { action => 'PARAM', proto => 'tcp', dport => '2598' }, | |
134 | ], | |
135 | 'DAAP' => [ | |
136 | "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)", | |
137 | { action => 'PARAM', proto => 'tcp', dport => '3689' }, | |
138 | { action => 'PARAM', proto => 'udp', dport => '3689' }, | |
139 | ], | |
140 | 'DCC' => [ | |
141 | "Distributed Checksum Clearinghouse spam filtering mechanism", | |
142 | { action => 'PARAM', proto => 'tcp', dport => '6277' }, | |
143 | ], | |
144 | 'DHCPfwd' => [ | |
145 | "Forwarded DHCP traffic (bidirectional)", | |
146 | { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' }, | |
147 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' }, | |
148 | ], | |
149 | 'DNS' => [ | |
150 | "Domain Name System traffic (upd and tcp)", | |
151 | { action => 'PARAM', proto => 'udp', dport => '53' }, | |
152 | { action => 'PARAM', proto => 'tcp', dport => '53' }, | |
153 | ], | |
154 | 'Distcc' => [ | |
155 | "Distributed Compiler service", | |
156 | { action => 'PARAM', proto => 'tcp', dport => '3632' }, | |
157 | ], | |
158 | 'FTP' => [ | |
159 | "File Transfer Protocol", | |
160 | { action => 'PARAM', proto => 'tcp', dport => '21' }, | |
161 | ], | |
162 | 'Finger' => [ | |
163 | "Finger protocol (RFC 742)", | |
164 | { action => 'PARAM', proto => 'tcp', dport => '79' }, | |
165 | ], | |
166 | 'GNUnet' => [ | |
167 | "GNUnet secure peer-to-peer networking traffic", | |
168 | { action => 'PARAM', proto => 'tcp', dport => '2086' }, | |
169 | { action => 'PARAM', proto => 'udp', dport => '2086' }, | |
170 | { action => 'PARAM', proto => 'tcp', dport => '1080' }, | |
171 | { action => 'PARAM', proto => 'udp', dport => '1080' }, | |
172 | ], | |
173 | 'GRE' => [ | |
174 | "Generic Routing Encapsulation tunneling protocol (bidirectional)", | |
175 | { action => 'PARAM', proto => '47' }, | |
176 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' }, | |
177 | ], | |
178 | 'Git' => [ | |
179 | "Git distributed revision control traffic", | |
180 | { action => 'PARAM', proto => 'tcp', dport => '9418' }, | |
181 | ], | |
182 | 'HKP' => [ | |
183 | "OpenPGP HTTP keyserver protocol traffic", | |
184 | { action => 'PARAM', proto => 'tcp', dport => '11371' }, | |
185 | ], | |
186 | 'HTTP' => [ | |
187 | "Hypertext Transfer Protocol (WWW)", | |
188 | { action => 'PARAM', proto => 'tcp', dport => '80' }, | |
189 | ], | |
190 | 'HTTPS' => [ | |
191 | "Hypertext Transfer Protocol (WWW) over SSL", | |
192 | { action => 'PARAM', proto => 'tcp', dport => '443' }, | |
193 | ], | |
194 | 'ICPV2' => [ | |
195 | "Internet Cache Protocol V2 (Squid) traffic", | |
196 | { action => 'PARAM', proto => 'udp', dport => '3130' }, | |
197 | ], | |
198 | 'ICQ' => [ | |
199 | "AOL Instant Messenger traffic", | |
200 | { action => 'PARAM', proto => 'tcp', dport => '5190' }, | |
201 | ], | |
202 | 'IMAP' => [ | |
203 | "Internet Message Access Protocol", | |
204 | { action => 'PARAM', proto => 'tcp', dport => '143' }, | |
205 | ], | |
206 | 'IMAPS' => [ | |
207 | "Internet Message Access Protocol over SSL", | |
208 | { action => 'PARAM', proto => 'tcp', dport => '993' }, | |
209 | ], | |
210 | 'IPIP' => [ | |
211 | "IPIP capsulation traffic (bidirectional)", | |
212 | { action => 'PARAM', proto => '94' }, | |
213 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' }, | |
214 | ], | |
215 | 'IPsec' => [ | |
216 | "IPsec traffic (bidirectional)", | |
217 | { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' }, | |
218 | { action => 'PARAM', proto => '50' }, | |
219 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' }, | |
220 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' }, | |
221 | ], | |
222 | 'IPsecah' => [ | |
223 | "IPsec authentication (AH) traffic (bidirectional)", | |
224 | { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' }, | |
225 | { action => 'PARAM', proto => '51' }, | |
226 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' }, | |
227 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' }, | |
228 | ], | |
229 | 'IPsecnat' => [ | |
230 | "IPsec traffic and Nat-Traversal (bidirectional)", | |
231 | { action => 'PARAM', proto => 'udp', dport => '500' }, | |
232 | { action => 'PARAM', proto => 'udp', dport => '4500' }, | |
233 | { action => 'PARAM', proto => '50' }, | |
234 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' }, | |
235 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' }, | |
236 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' }, | |
237 | ], | |
238 | 'IRC' => [ | |
239 | "Internet Relay Chat traffic", | |
240 | { action => 'PARAM', proto => 'tcp', dport => '6667' }, | |
241 | ], | |
242 | 'Jetdirect' => [ | |
243 | "HP Jetdirect printing", | |
244 | { action => 'PARAM', proto => 'tcp', dport => '9100' }, | |
245 | ], | |
246 | 'L2TP' => [ | |
247 | "Layer 2 Tunneling Protocol traffic", | |
248 | { action => 'PARAM', proto => 'udp', dport => '1701' }, | |
249 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' }, | |
250 | ], | |
251 | 'LDAP' => [ | |
252 | "Lightweight Directory Access Protocol traffic", | |
253 | { action => 'PARAM', proto => 'tcp', dport => '389' }, | |
254 | ], | |
255 | 'LDAPS' => [ | |
256 | "Secure Lightweight Directory Access Protocol traffic", | |
257 | { action => 'PARAM', proto => 'tcp', dport => '636' }, | |
258 | ], | |
259 | 'MSNP' => [ | |
260 | "Microsoft Notification Protocol", | |
261 | { action => 'PARAM', proto => 'tcp', dport => '1863' }, | |
262 | ], | |
263 | 'MSSQL' => [ | |
264 | "Microsoft SQL Server", | |
265 | { action => 'PARAM', proto => 'tcp', dport => '1433' }, | |
266 | ], | |
267 | 'Mail' => [ | |
268 | "Mail traffic (SMTP, SMTPS, Submission)", | |
269 | { action => 'PARAM', proto => 'tcp', dport => '25' }, | |
270 | { action => 'PARAM', proto => 'tcp', dport => '465' }, | |
271 | { action => 'PARAM', proto => 'tcp', dport => '587' }, | |
272 | ], | |
273 | 'Munin' => [ | |
274 | "Munin networked resource monitoring traffic", | |
275 | { action => 'PARAM', proto => 'tcp', dport => '4949' }, | |
276 | ], | |
277 | 'MySQL' => [ | |
278 | "MySQL server", | |
279 | { action => 'PARAM', proto => 'tcp', dport => '3306' }, | |
280 | ], | |
281 | 'NNTP' => [ | |
282 | "NNTP traffic (Usenet).", | |
283 | { action => 'PARAM', proto => 'tcp', dport => '119' }, | |
284 | ], | |
285 | 'NNTPS' => [ | |
286 | "Encrypted NNTP traffic (Usenet)", | |
287 | { action => 'PARAM', proto => 'tcp', dport => '563' }, | |
288 | ], | |
289 | 'NTP' => [ | |
290 | "Network Time Protocol (ntpd)", | |
291 | { action => 'PARAM', proto => 'udp', dport => '123' }, | |
292 | ], | |
293 | 'NTPbi' => [ | |
294 | "Bi-directional NTP (for NTP peers)", | |
295 | { action => 'PARAM', proto => 'udp', dport => '123' }, | |
296 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' }, | |
297 | ], | |
298 | 'OSPF' => [ | |
299 | "OSPF multicast traffic", | |
300 | { action => 'PARAM', proto => '89' }, | |
301 | ], | |
302 | 'OpenVPN' => [ | |
303 | "OpenVPN traffic", | |
304 | { action => 'PARAM', proto => 'udp', dport => '1194' }, | |
305 | ], | |
306 | 'PCA' => [ | |
307 | "Symantec PCAnywere (tm)", | |
308 | { action => 'PARAM', proto => 'udp', dport => '5632' }, | |
309 | { action => 'PARAM', proto => 'tcp', dport => '5631' }, | |
310 | ], | |
311 | 'POP3' => [ | |
312 | "POP3 traffic", | |
313 | { action => 'PARAM', proto => 'tcp', dport => '110' }, | |
314 | ], | |
315 | 'POP3S' => [ | |
316 | "Encrypted POP3 traffic", | |
317 | { action => 'PARAM', proto => 'tcp', dport => '995' }, | |
318 | ], | |
319 | 'PPtP' => [ | |
320 | "Point-to-Point Tunneling Protocol", | |
321 | { action => 'PARAM', proto => '47' }, | |
322 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' }, | |
323 | { action => 'PARAM', proto => 'tcp', dport => '1723' }, | |
324 | ], | |
325 | 'Ping' => [ | |
326 | "ICMP echo request", | |
327 | { action => 'PARAM', proto => 'icmp', dport => 'echo-request' }, | |
328 | ], | |
329 | 'PostgreSQL' => [ | |
330 | "PostgreSQL server", | |
331 | { action => 'PARAM', proto => 'tcp', dport => '5432' }, | |
332 | ], | |
333 | 'Printer' => [ | |
334 | "Line Printer protocol printing", | |
335 | { action => 'PARAM', proto => 'tcp', dport => '515' }, | |
336 | ], | |
337 | 'RDP' => [ | |
338 | "Microsoft Remote Desktop Protocol traffic", | |
339 | { action => 'PARAM', proto => 'tcp', dport => '3389' }, | |
340 | ], | |
341 | 'RIPbi' => [ | |
342 | "Routing Information Protocol (bidirectional)", | |
343 | { action => 'PARAM', proto => 'udp', dport => '520' }, | |
344 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' }, | |
345 | ], | |
346 | 'RNDC' => [ | |
347 | "BIND remote management protocol", | |
348 | { action => 'PARAM', proto => 'tcp', dport => '953' }, | |
349 | ], | |
350 | 'Razor' => [ | |
351 | "Razor Antispam System", | |
352 | { action => 'ACCEPT', proto => 'tcp', dport => '2703' }, | |
353 | ], | |
354 | 'Rdate' => [ | |
355 | "Remote time retrieval (rdate)", | |
356 | { action => 'PARAM', proto => 'tcp', dport => '37' }, | |
357 | ], | |
358 | 'Rsync' => [ | |
359 | "Rsync server", | |
360 | { action => 'PARAM', proto => 'tcp', dport => '873' }, | |
361 | ], | |
362 | 'SANE' => [ | |
363 | "SANE network scanning", | |
364 | { action => 'PARAM', proto => 'tcp', dport => '6566' }, | |
365 | ], | |
366 | 'SMB' => [ | |
367 | "Microsoft SMB traffic", | |
368 | { action => 'PARAM', proto => 'udp', dport => '135,445' }, | |
369 | { action => 'PARAM', proto => 'udp', dport => '137:139' }, | |
370 | { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' }, | |
371 | { action => 'PARAM', proto => 'tcp', dport => '135,139,445' }, | |
372 | ], | |
373 | 'SMBBI' => [ | |
374 | "Microsoft SMB traffic (bidirectional)", | |
375 | { action => 'PARAM', proto => 'udp', dport => '135,445' }, | |
376 | { action => 'PARAM', proto => 'udp', dport => '137:139' }, | |
377 | { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' }, | |
378 | { action => 'PARAM', proto => 'tcp', dport => '135,139,445' }, | |
379 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' }, | |
380 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' }, | |
381 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' }, | |
382 | { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' }, | |
383 | ], | |
384 | 'SMBswat' => [ | |
385 | "Samba Web Administration Tool", | |
386 | { action => 'PARAM', proto => 'tcp', dport => '901' }, | |
387 | ], | |
388 | 'SMTP' => [ | |
389 | "Simple Mail Transfer Protocol", | |
390 | { action => 'PARAM', proto => 'tcp', dport => '25' }, | |
391 | ], | |
392 | 'SMTPS' => [ | |
393 | "Encrypted Simple Mail Transfer Protocol", | |
394 | { action => 'PARAM', proto => 'tcp', dport => '465' }, | |
395 | ], | |
396 | 'SNMP' => [ | |
397 | "Simple Network Management Protocol", | |
398 | { action => 'PARAM', proto => 'udp', dport => '161:162' }, | |
399 | { action => 'PARAM', proto => 'tcp', dport => '161' }, | |
400 | ], | |
401 | 'SPAMD' => [ | |
402 | "Spam Assassin SPAMD traffic", | |
403 | { action => 'PARAM', proto => 'tcp', dport => '783' }, | |
404 | ], | |
405 | 'SSH' => [ | |
406 | "Secure shell traffic", | |
407 | { action => 'PARAM', proto => 'tcp', dport => '22' }, | |
408 | ], | |
409 | 'SVN' => [ | |
410 | "Subversion server (svnserve)", | |
411 | { action => 'PARAM', proto => 'tcp', dport => '3690' }, | |
412 | ], | |
413 | 'SixXS' => [ | |
414 | "SixXS IPv6 Deployment and Tunnel Broker", | |
415 | { action => 'PARAM', proto => 'tcp', dport => '3874' }, | |
416 | { action => 'PARAM', proto => 'udp', dport => '3740' }, | |
417 | { action => 'PARAM', proto => '41' }, | |
418 | { action => 'PARAM', proto => 'udp', dport => '5072,8374' }, | |
419 | ], | |
420 | 'Squid' => [ | |
421 | "Squid web proxy traffic", | |
422 | { action => 'PARAM', proto => 'tcp', dport => '3128' }, | |
423 | ], | |
424 | 'Submission' => [ | |
425 | "Mail message submission traffic", | |
426 | { action => 'PARAM', proto => 'tcp', dport => '587' }, | |
427 | ], | |
428 | 'Syslog' => [ | |
429 | "Syslog protocol (RFC 5424) traffic", | |
430 | { action => 'PARAM', proto => 'udp', dport => '514' }, | |
431 | { action => 'PARAM', proto => 'tcp', dport => '514' }, | |
432 | ], | |
433 | 'TFTP' => [ | |
434 | "Trivial File Transfer Protocol traffic", | |
435 | { action => 'PARAM', proto => 'udp', dport => '69' }, | |
436 | ], | |
437 | 'Telnet' => [ | |
438 | "Telnet traffic", | |
439 | { action => 'PARAM', proto => 'tcp', dport => '23' }, | |
440 | ], | |
441 | 'Telnets' => [ | |
442 | "Telnet over SSL", | |
443 | { action => 'PARAM', proto => 'tcp', dport => '992' }, | |
444 | ], | |
445 | 'Time' => [ | |
446 | "RFC 868 Time protocol", | |
447 | { action => 'PARAM', proto => 'tcp', dport => '37' }, | |
448 | ], | |
449 | 'Trcrt' => [ | |
450 | "Traceroute (for up to 30 hops) traffic", | |
451 | { action => 'PARAM', proto => 'udp', dport => '33434:33524' }, | |
452 | { action => 'PARAM', proto => 'icmp', dport => 'echo-request' }, | |
453 | ], | |
454 | 'VNC' => [ | |
455 | "VNC traffic for VNC display's 0 - 9", | |
456 | { action => 'PARAM', proto => 'tcp', dport => '5900:5909' }, | |
457 | ], | |
458 | 'VNCL' => [ | |
459 | "VNC traffic from Vncservers to Vncviewers in listen mode", | |
460 | { action => 'PARAM', proto => 'tcp', dport => '5500' }, | |
461 | ], | |
462 | 'Web' => [ | |
463 | "WWW traffic (HTTP and HTTPS)", | |
464 | { action => 'PARAM', proto => 'tcp', dport => '80' }, | |
465 | { action => 'PARAM', proto => 'tcp', dport => '443' }, | |
466 | ], | |
467 | 'Webcache' => [ | |
468 | "Web Cache/Proxy traffic (port 8080)", | |
469 | { action => 'PARAM', proto => 'tcp', dport => '8080' }, | |
470 | ], | |
471 | 'Webmin' => [ | |
472 | "Webmin traffic", | |
473 | { action => 'PARAM', proto => 'tcp', dport => '10000' }, | |
474 | ], | |
475 | 'Whois' => [ | |
476 | "Whois (nicname, RFC 3912) traffic", | |
477 | { action => 'PARAM', proto => 'tcp', dport => '43' }, | |
478 | ], | |
479 | }; | |
480 | ||
481 | my $pve_fw_parsed_macros; | |
482 | my $pve_fw_macro_descr; | |
483 | my $pve_fw_preferred_macro_names = {}; | |
484 | ||
485 | my $pve_std_chains = { | |
486 | 'PVEFW-SET-ACCEPT-MARK' => [ | |
487 | "-j MARK --set-mark 1", | |
488 | ], | |
489 | 'PVEFW-DropBroadcast' => [ | |
490 | # same as shorewall 'Broadcast' | |
491 | # simply DROP BROADCAST/MULTICAST/ANYCAST | |
492 | # we can use this to reduce logging | |
493 | { action => 'DROP', dsttype => 'BROADCAST' }, | |
494 | { action => 'DROP', dsttype => 'MULTICAST' }, | |
495 | { action => 'DROP', dsttype => 'ANYCAST' }, | |
496 | { action => 'DROP', dest => '224.0.0.0/4' }, | |
497 | ], | |
498 | 'PVEFW-reject' => [ | |
499 | # same as shorewall 'reject' | |
500 | { action => 'DROP', dsttype => 'BROADCAST' }, | |
501 | { action => 'DROP', source => '224.0.0.0/4' }, | |
502 | { action => 'DROP', proto => 'icmp' }, | |
503 | "-p tcp -j REJECT --reject-with tcp-reset", | |
504 | "-p udp -j REJECT --reject-with icmp-port-unreachable", | |
505 | "-p icmp -j REJECT --reject-with icmp-host-unreachable", | |
506 | "-j REJECT --reject-with icmp-host-prohibited", | |
507 | ], | |
508 | 'PVEFW-Drop' => [ | |
509 | # same as shorewall 'Drop', which is equal to DROP, | |
510 | # but REJECT/DROP some packages to reduce logging, | |
511 | # and ACCEPT critical ICMP types | |
512 | { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth' | |
513 | # we are not interested in BROADCAST/MULTICAST/ANYCAST | |
514 | { action => 'PVEFW-DropBroadcast' }, | |
515 | # ACCEPT critical ICMP types | |
516 | { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' }, | |
517 | { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' }, | |
518 | # Drop packets with INVALID state | |
519 | "-m conntrack --ctstate INVALID -j DROP", | |
520 | # Drop Microsoft SMB noise | |
521 | { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 }, | |
522 | { action => 'DROP', proto => 'udp', dport => '137:139'}, | |
523 | { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 }, | |
524 | { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 }, | |
525 | { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP | |
526 | # Drop new/NotSyn traffic so that it doesn't get logged | |
527 | "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP", | |
528 | # Drop DNS replies | |
529 | { action => 'DROP', proto => 'udp', sport => 53 }, | |
530 | ], | |
531 | 'PVEFW-Reject' => [ | |
532 | # same as shorewall 'Reject', which is equal to Reject, | |
533 | # but REJECT/DROP some packages to reduce logging, | |
534 | # and ACCEPT critical ICMP types | |
535 | { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth' | |
536 | # we are not interested in BROADCAST/MULTICAST/ANYCAST | |
537 | { action => 'PVEFW-DropBroadcast' }, | |
538 | # ACCEPT critical ICMP types | |
539 | { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' }, | |
540 | { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' }, | |
541 | # Drop packets with INVALID state | |
542 | "-m conntrack --ctstate INVALID -j DROP", | |
543 | # Drop Microsoft SMB noise | |
544 | { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 }, | |
545 | { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'}, | |
546 | { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 }, | |
547 | { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 }, | |
548 | { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP | |
549 | # Drop new/NotSyn traffic so that it doesn't get logged | |
550 | "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP", | |
551 | # Drop DNS replies | |
552 | { action => 'DROP', proto => 'udp', sport => 53 }, | |
553 | ], | |
554 | 'PVEFW-tcpflags' => [ | |
555 | # same as shorewall tcpflags action. | |
556 | # Packets arriving on this interface are checked for som illegal combinations of TCP flags | |
557 | "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags", | |
558 | "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags", | |
559 | "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags", | |
560 | "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags", | |
561 | "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags", | |
562 | ], | |
563 | 'PVEFW-smurfs' => [ | |
564 | # same as shorewall smurfs action | |
565 | # Filter packets for smurfs (packets with a broadcast address as the source). | |
566 | "-s 0.0.0.0/32 -j RETURN", | |
567 | "-m addrtype --src-type BROADCAST -g PVEFW-smurflog", | |
568 | "-s 224.0.0.0/4 -g PVEFW-smurflog", | |
569 | ], | |
570 | }; | |
571 | ||
572 | # iptables -p icmp -h | |
573 | my $icmp_type_names = { | |
574 | any => 1, | |
575 | 'echo-reply' => 1, | |
576 | 'destination-unreachable' => 1, | |
577 | 'network-unreachable' => 1, | |
578 | 'host-unreachable' => 1, | |
579 | 'protocol-unreachable' => 1, | |
580 | 'port-unreachable' => 1, | |
581 | 'fragmentation-needed' => 1, | |
582 | 'source-route-failed' => 1, | |
583 | 'network-unknown' => 1, | |
584 | 'host-unknown' => 1, | |
585 | 'network-prohibited' => 1, | |
586 | 'host-prohibited' => 1, | |
587 | 'TOS-network-unreachable' => 1, | |
588 | 'TOS-host-unreachable' => 1, | |
589 | 'communication-prohibited' => 1, | |
590 | 'host-precedence-violation' => 1, | |
591 | 'precedence-cutoff' => 1, | |
592 | 'source-quench' => 1, | |
593 | 'redirect' => 1, | |
594 | 'network-redirect' => 1, | |
595 | 'host-redirect' => 1, | |
596 | 'TOS-network-redirect' => 1, | |
597 | 'TOS-host-redirect' => 1, | |
598 | 'echo-request' => 1, | |
599 | 'router-advertisement' => 1, | |
600 | 'router-solicitation' => 1, | |
601 | 'time-exceeded' => 1, | |
602 | 'ttl-zero-during-transit' => 1, | |
603 | 'ttl-zero-during-reassembly' => 1, | |
604 | 'parameter-problem' => 1, | |
605 | 'ip-header-bad' => 1, | |
606 | 'required-option-missing' => 1, | |
607 | 'timestamp-request' => 1, | |
608 | 'timestamp-reply' => 1, | |
609 | 'address-mask-request' => 1, | |
610 | 'address-mask-reply' => 1, | |
611 | }; | |
612 | ||
613 | sub init_firewall_macros { | |
614 | ||
615 | $pve_fw_parsed_macros = {}; | |
616 | ||
617 | foreach my $k (keys %$pve_fw_macros) { | |
618 | my $lc_name = lc($k); | |
619 | my $macro = $pve_fw_macros->{$k}; | |
620 | if (!ref($macro->[0])) { | |
621 | $pve_fw_macro_descr->{$k} = shift @$macro; | |
622 | } | |
623 | $pve_fw_preferred_macro_names->{$lc_name} = $k; | |
624 | $pve_fw_parsed_macros->{$k} = $macro; | |
625 | } | |
626 | } | |
627 | ||
628 | init_firewall_macros(); | |
629 | ||
630 | sub get_macros { | |
631 | return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros; | |
632 | } | |
633 | ||
634 | my $etc_services; | |
635 | ||
636 | sub get_etc_services { | |
637 | ||
638 | return $etc_services if $etc_services; | |
639 | ||
640 | my $filename = "/etc/services"; | |
641 | ||
642 | my $fh = IO::File->new($filename, O_RDONLY); | |
643 | if (!$fh) { | |
644 | warn "unable to read '$filename' - $!\n"; | |
645 | return {}; | |
646 | } | |
647 | ||
648 | my $services = {}; | |
649 | ||
650 | while (my $line = <$fh>) { | |
651 | chomp ($line); | |
652 | next if $line =~m/^#/; | |
653 | next if ($line =~m/^\s*$/); | |
654 | ||
655 | if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) { | |
656 | $services->{byid}->{$2}->{name} = $1; | |
657 | $services->{byid}->{$2}->{port} = $2; | |
658 | $services->{byid}->{$2}->{$3} = 1; | |
659 | $services->{byname}->{$1} = $services->{byid}->{$2}; | |
660 | } | |
661 | } | |
662 | ||
663 | close($fh); | |
664 | ||
665 | $etc_services = $services; | |
666 | ||
667 | ||
668 | return $etc_services; | |
669 | } | |
670 | ||
671 | my $etc_protocols; | |
672 | ||
673 | sub get_etc_protocols { | |
674 | return $etc_protocols if $etc_protocols; | |
675 | ||
676 | my $filename = "/etc/protocols"; | |
677 | ||
678 | my $fh = IO::File->new($filename, O_RDONLY); | |
679 | if (!$fh) { | |
680 | warn "unable to read '$filename' - $!\n"; | |
681 | return {}; | |
682 | } | |
683 | ||
684 | my $protocols = {}; | |
685 | ||
686 | while (my $line = <$fh>) { | |
687 | chomp ($line); | |
688 | next if $line =~m/^#/; | |
689 | next if ($line =~m/^\s*$/); | |
690 | ||
691 | if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) { | |
692 | $protocols->{byid}->{$2}->{name} = $1; | |
693 | $protocols->{byname}->{$1} = $protocols->{byid}->{$2}; | |
694 | } | |
695 | } | |
696 | ||
697 | close($fh); | |
698 | ||
699 | $etc_protocols = $protocols; | |
700 | ||
701 | return $etc_protocols; | |
702 | } | |
703 | ||
704 | sub parse_address_list { | |
705 | my ($str) = @_; | |
706 | ||
707 | return if $str =~ m/^(\+)(\S+)$/; # ipset ref | |
708 | ||
709 | my $count = 0; | |
710 | my $iprange = 0; | |
711 | foreach my $elem (split(/,/, $str)) { | |
712 | $count++; | |
713 | if (!Net::IP->new($elem)) { | |
714 | my $err = Net::IP::Error(); | |
715 | die "invalid IP address: $err\n"; | |
716 | } | |
717 | $iprange = 1 if $elem =~ m/-/; | |
718 | } | |
719 | ||
720 | die "you can use a range in a list\n" if $iprange && $count > 1; | |
721 | } | |
722 | ||
723 | sub parse_port_name_number_or_range { | |
724 | my ($str) = @_; | |
725 | ||
726 | my $services = PVE::Firewall::get_etc_services(); | |
727 | my $count = 0; | |
728 | my $icmp_port = 0; | |
729 | ||
730 | foreach my $item (split(/,/, $str)) { | |
731 | $count++; | |
732 | if ($item =~ m/^(\d+):(\d+)$/) { | |
733 | my ($port1, $port2) = ($1, $2); | |
734 | die "invalid port '$port1'\n" if $port1 > 65535; | |
735 | die "invalid port '$port2'\n" if $port2 > 65535; | |
736 | } elsif ($item =~ m/^(\d+)$/) { | |
737 | my $port = $1; | |
738 | die "invalid port '$port'\n" if $port > 65535; | |
739 | } else { | |
740 | if ($icmp_type_names->{$item}) { | |
741 | $icmp_port = 1; | |
742 | } else { | |
743 | die "invalid port '$item'\n" if !$services->{byname}->{$item}; | |
744 | } | |
745 | } | |
746 | } | |
747 | ||
748 | die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1; | |
749 | ||
750 | return $count; | |
751 | } | |
752 | ||
753 | PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec); | |
754 | sub pve_fw_verify_port_spec { | |
755 | my ($portstr) = @_; | |
756 | ||
757 | parse_port_name_number_or_range($portstr); | |
758 | ||
759 | return $portstr; | |
760 | } | |
761 | ||
762 | PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec); | |
763 | sub pve_fw_verify_v4addr_spec { | |
764 | my ($list) = @_; | |
765 | ||
766 | parse_address_list($list); | |
767 | ||
768 | return $list; | |
769 | } | |
770 | ||
771 | PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec); | |
772 | sub pve_fw_verify_protocol_spec { | |
773 | my ($proto) = @_; | |
774 | ||
775 | my $protocols = get_etc_protocols(); | |
776 | ||
777 | die "unknown protocol '$proto'\n" if $proto && | |
778 | !(defined($protocols->{byname}->{$proto}) || | |
779 | defined($protocols->{byid}->{$proto})); | |
780 | ||
781 | return $proto; | |
782 | } | |
783 | ||
784 | ||
785 | # helper function for API | |
786 | ||
787 | my $rule_properties = { | |
788 | pos => { | |
789 | description => "Update rule at position <pos>.", | |
790 | type => 'integer', | |
791 | minimum => 0, | |
792 | optional => 1, | |
793 | }, | |
794 | digest => get_standard_option('pve-config-digest'), | |
795 | type => { | |
796 | type => 'string', | |
797 | optional => 1, | |
798 | enum => ['in', 'out', 'group'], | |
799 | }, | |
800 | action => { | |
801 | description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.", | |
802 | type => 'string', | |
803 | optional => 1, | |
804 | pattern => $security_group_pattern, | |
805 | maxLength => 20, | |
806 | minLength => 2, | |
807 | }, | |
808 | macro => { | |
809 | type => 'string', | |
810 | optional => 1, | |
811 | maxLength => 128, | |
812 | }, | |
813 | iface => get_standard_option('pve-iface', { optional => 1 }), | |
814 | source => { | |
815 | type => 'string', format => 'pve-fw-v4addr-spec', | |
816 | optional => 1, | |
817 | }, | |
818 | dest => { | |
819 | type => 'string', format => 'pve-fw-v4addr-spec', | |
820 | optional => 1, | |
821 | }, | |
822 | proto => { | |
823 | type => 'string', format => 'pve-fw-protocol-spec', | |
824 | optional => 1, | |
825 | }, | |
826 | enable => { | |
827 | type => 'boolean', | |
828 | optional => 1, | |
829 | }, | |
830 | sport => { | |
831 | type => 'string', format => 'pve-fw-port-spec', | |
832 | optional => 1, | |
833 | }, | |
834 | dport => { | |
835 | type => 'string', format => 'pve-fw-port-spec', | |
836 | optional => 1, | |
837 | }, | |
838 | comment => { | |
839 | type => 'string', | |
840 | optional => 1, | |
841 | }, | |
842 | }; | |
843 | ||
844 | sub cleanup_fw_rule { | |
845 | my ($rule, $digest, $pos) = @_; | |
846 | ||
847 | my $r = {}; | |
848 | ||
849 | foreach my $k (keys %$rule) { | |
850 | next if !$rule_properties->{$k}; | |
851 | my $v = $rule->{$k}; | |
852 | next if !defined($v); | |
853 | $r->{$k} = $v; | |
854 | $r->{digest} = $digest; | |
855 | $r->{pos} = $pos; | |
856 | } | |
857 | ||
858 | return $r; | |
859 | } | |
860 | ||
861 | sub add_rule_properties { | |
862 | my ($properties) = @_; | |
863 | ||
864 | foreach my $k (keys %$rule_properties) { | |
865 | my $h = $rule_properties->{$k}; | |
866 | # copy data, so that we can modify later without side effects | |
867 | foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; } | |
868 | } | |
869 | ||
870 | return $properties; | |
871 | } | |
872 | ||
873 | sub delete_rule_properties { | |
874 | my ($rule, $delete_str) = @_; | |
875 | ||
876 | foreach my $opt (PVE::Tools::split_list($delete_str)) { | |
877 | raise_param_exc({ 'delete' => "no such property ('$opt')"}) | |
878 | if !defined($rule_properties->{$opt}); | |
879 | raise_param_exc({ 'delete' => "unable to delete required property '$opt'"}) | |
880 | if $opt eq 'type' || $opt eq 'action'; | |
881 | delete $rule->{$opt}; | |
882 | } | |
883 | ||
884 | return $rule; | |
885 | } | |
886 | ||
887 | my $apply_macro = sub { | |
888 | my ($macro_name, $param, $verify) = @_; | |
889 | ||
890 | my $macro_rules = $pve_fw_parsed_macros->{$macro_name}; | |
891 | die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen | |
892 | ||
893 | my $rules = []; | |
894 | ||
895 | foreach my $templ (@$macro_rules) { | |
896 | my $rule = {}; | |
897 | my $param_used = {}; | |
898 | foreach my $k (keys %$templ) { | |
899 | my $v = $templ->{$k}; | |
900 | if ($v eq 'PARAM') { | |
901 | $v = $param->{$k}; | |
902 | $param_used->{$k} = 1; | |
903 | } elsif ($v eq 'DEST') { | |
904 | $v = $param->{dest}; | |
905 | $param_used->{dest} = 1; | |
906 | } elsif ($v eq 'SOURCE') { | |
907 | $v = $param->{source}; | |
908 | $param_used->{source} = 1; | |
909 | } | |
910 | ||
911 | if (!defined($v)) { | |
912 | my $msg = "missing parameter '$k' in macro '$macro_name'"; | |
913 | raise_param_exc({ macro => $msg }) if $verify; | |
914 | die "$msg\n"; | |
915 | } | |
916 | $rule->{$k} = $v; | |
917 | } | |
918 | foreach my $k (keys %$param) { | |
919 | next if $k eq 'macro'; | |
920 | next if !defined($param->{$k}); | |
921 | next if $param_used->{$k}; | |
922 | if (defined($rule->{$k})) { | |
923 | if ($rule->{$k} ne $param->{$k}) { | |
924 | my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')"; | |
925 | raise_param_exc({ $k => $msg }) if $verify; | |
926 | die "$msg\n"; | |
927 | } | |
928 | } else { | |
929 | $rule->{$k} = $param->{$k}; | |
930 | } | |
931 | } | |
932 | push @$rules, $rule; | |
933 | } | |
934 | ||
935 | return $rules; | |
936 | }; | |
937 | ||
938 | sub verify_rule { | |
939 | my ($rule, $allow_groups) = @_; | |
940 | ||
941 | my $type = $rule->{type}; | |
942 | ||
943 | raise_param_exc({ type => "missing property"}) if !$type; | |
944 | raise_param_exc({ action => "missing property"}) if !$rule->{action}; | |
945 | ||
946 | if ($type eq 'in' || $type eq 'out') { | |
947 | raise_param_exc({ action => "unknown action '$rule->{action}'"}) | |
948 | if $rule->{action} !~ m/^(ACCEPT|DROP|REJECT)$/; | |
949 | } elsif ($type eq 'group') { | |
950 | raise_param_exc({ type => "security groups not allowed"}) | |
951 | if !$allow_groups; | |
952 | raise_param_exc({ action => "invalid characters in security group name"}) | |
953 | if $rule->{action} !~ m/^${security_group_pattern}$/; | |
954 | } else { | |
955 | raise_param_exc({ type => "unknown rule type '$type'"}); | |
956 | } | |
957 | ||
958 | # fixme: verify $rule->{iface}? | |
959 | ||
960 | if ($rule->{macro}) { | |
961 | my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}; | |
962 | raise_param_exc({ macro => "unknown macro '$rule->{macro}'"}) if !$preferred_name; | |
963 | $rule->{macro} = $preferred_name; | |
964 | } | |
965 | ||
966 | if ($rule->{dport}) { | |
967 | eval { parse_port_name_number_or_range($rule->{dport}); }; | |
968 | raise_param_exc({ dport => $@ }) if $@; | |
969 | } | |
970 | ||
971 | if ($rule->{sport}) { | |
972 | eval { parse_port_name_number_or_range($rule->{sport}); }; | |
973 | raise_param_exc({ sport => $@ }) if $@; | |
974 | } | |
975 | ||
976 | if ($rule->{source}) { | |
977 | eval { parse_address_list($rule->{source}); }; | |
978 | raise_param_exc({ source => $@ }) if $@; | |
979 | } | |
980 | ||
981 | if ($rule->{dest}) { | |
982 | eval { parse_address_list($rule->{dest}); }; | |
983 | raise_param_exc({ dest => $@ }) if $@; | |
984 | } | |
985 | ||
986 | if ($rule->{macro}) { | |
987 | &$apply_macro($rule->{macro}, $rule, 1); | |
988 | } | |
989 | ||
990 | return $rule; | |
991 | } | |
992 | ||
993 | sub copy_rule_data { | |
994 | my ($rule, $param) = @_; | |
995 | ||
996 | foreach my $k (keys %$rule_properties) { | |
997 | if (defined(my $v = $param->{$k})) { | |
998 | if ($v eq '' || $v eq '-') { | |
999 | delete $rule->{$k}; | |
1000 | } else { | |
1001 | $rule->{$k} = $v; | |
1002 | } | |
1003 | } else { | |
1004 | delete $rule->{$k}; | |
1005 | } | |
1006 | } | |
1007 | ||
1008 | # verify rule now | |
1009 | ||
1010 | return $rule; | |
1011 | } | |
1012 | ||
1013 | # core functions | |
1014 | my $bridge_firewall_enabled = 0; | |
1015 | ||
1016 | sub enable_bridge_firewall { | |
1017 | ||
1018 | return if $bridge_firewall_enabled; # only once | |
1019 | ||
1020 | PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1"); | |
1021 | PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1"); | |
1022 | ||
1023 | # make sure syncookies are enabled (which is default on newer 3.X kernels anyways) | |
1024 | PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1"); | |
1025 | ||
1026 | $bridge_firewall_enabled = 1; | |
1027 | } | |
1028 | ||
1029 | my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n"; | |
1030 | ||
1031 | sub iptables_restore_cmdlist { | |
1032 | my ($cmdlist) = @_; | |
1033 | ||
1034 | run_command("/sbin/iptables-restore -n", input => $cmdlist); | |
1035 | } | |
1036 | ||
1037 | sub ipset_restore_cmdlist { | |
1038 | my ($cmdlist) = @_; | |
1039 | ||
1040 | run_command("/usr/sbin/ipset restore", input => $cmdlist); | |
1041 | } | |
1042 | ||
1043 | sub iptables_get_chains { | |
1044 | ||
1045 | my $res = {}; | |
1046 | ||
1047 | # check what chains we want to track | |
1048 | my $is_pvefw_chain = sub { | |
1049 | my $name = shift; | |
1050 | ||
1051 | return 1 if $name =~ m/^PVEFW-\S+$/; | |
1052 | ||
1053 | return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/; | |
1054 | ||
1055 | return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable | |
1056 | ||
1057 | return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/; | |
1058 | ||
1059 | return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT|IPS)$/; | |
1060 | return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/; | |
1061 | ||
1062 | return undef; | |
1063 | }; | |
1064 | ||
1065 | my $table = ''; | |
1066 | ||
1067 | my $hooks = {}; | |
1068 | ||
1069 | my $parser = sub { | |
1070 | my $line = shift; | |
1071 | ||
1072 | return if $line =~ m/^#/; | |
1073 | return if $line =~ m/^\s*$/; | |
1074 | ||
1075 | if ($line =~ m/^\*(\S+)$/) { | |
1076 | $table = $1; | |
1077 | return; | |
1078 | } | |
1079 | ||
1080 | return if $table ne 'filter'; | |
1081 | ||
1082 | if ($line =~ m/^:(\S+)\s/) { | |
1083 | my $chain = $1; | |
1084 | return if !&$is_pvefw_chain($chain); | |
1085 | $res->{$chain} = "unknown"; | |
1086 | } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) { | |
1087 | my ($chain, $sig) = ($1, $2); | |
1088 | return if !&$is_pvefw_chain($chain); | |
1089 | $res->{$chain} = $sig; | |
1090 | } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) { | |
1091 | $hooks->{$1} = 1; | |
1092 | } else { | |
1093 | # simply ignore the rest | |
1094 | return; | |
1095 | } | |
1096 | }; | |
1097 | ||
1098 | run_command("/sbin/iptables-save", outfunc => $parser); | |
1099 | ||
1100 | return wantarray ? ($res, $hooks) : $res; | |
1101 | } | |
1102 | ||
1103 | sub iptables_chain_digest { | |
1104 | my ($rules) = @_; | |
1105 | my $digest = Digest::SHA->new('sha1'); | |
1106 | foreach my $rule (@$rules) { # order is important | |
1107 | $digest->add($rule); | |
1108 | } | |
1109 | return $digest->b64digest; | |
1110 | } | |
1111 | ||
1112 | sub ipset_chain_digest { | |
1113 | my ($rules) = @_; | |
1114 | ||
1115 | my $digest = Digest::SHA->new('sha1'); | |
1116 | foreach my $rule (sort @$rules) { # note: sorted | |
1117 | $digest->add($rule); | |
1118 | } | |
1119 | return $digest->b64digest; | |
1120 | } | |
1121 | ||
1122 | sub ipset_get_chains { | |
1123 | ||
1124 | my $res = {}; | |
1125 | my $chains = {}; | |
1126 | ||
1127 | my $parser = sub { | |
1128 | my $line = shift; | |
1129 | ||
1130 | return if $line =~ m/^#/; | |
1131 | return if $line =~ m/^\s*$/; | |
1132 | if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) { | |
1133 | my $chain = $1; | |
1134 | $line =~ s/\s+$//; # delete trailing white space | |
1135 | push @{$chains->{$chain}}, $line; | |
1136 | } else { | |
1137 | # simply ignore the rest | |
1138 | return; | |
1139 | } | |
1140 | }; | |
1141 | ||
1142 | run_command("/usr/sbin/ipset save", outfunc => $parser); | |
1143 | ||
1144 | # compute digest for each chain | |
1145 | foreach my $chain (keys %$chains) { | |
1146 | $res->{$chain} = ipset_chain_digest($chains->{$chain}); | |
1147 | } | |
1148 | ||
1149 | return $res; | |
1150 | } | |
1151 | ||
1152 | sub ruleset_generate_cmdstr { | |
1153 | my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_; | |
1154 | ||
1155 | return if defined($rule->{enable}) && !$rule->{enable}; | |
1156 | ||
1157 | die "unable to emit macro - internal error" if $rule->{macro}; # should not happen | |
1158 | ||
1159 | my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0; | |
1160 | my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0; | |
1161 | ||
1162 | my @cmd = (); | |
1163 | ||
1164 | push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in}; | |
1165 | push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out}; | |
1166 | ||
1167 | my $source = $rule->{source}; | |
1168 | my $dest = $rule->{dest}; | |
1169 | ||
1170 | if ($source) { | |
1171 | if ($source =~ m/^(\+)(\S+)$/) { | |
1172 | die "no such ipset $2" if !$cluster_conf->{ipset}->{$2}; | |
1173 | push @cmd, "-m set --match-set PVEFW-$2 src"; | |
1174 | ||
1175 | } elsif ($source =~ m/\-/){ | |
1176 | push @cmd, "-m iprange --src-range $source"; | |
1177 | ||
1178 | } else { | |
1179 | push @cmd, "-s $source"; | |
1180 | } | |
1181 | } | |
1182 | ||
1183 | if ($dest) { | |
1184 | if ($dest =~ m/^(\+)(\S+)$/) { | |
1185 | die "no such ipset $2" if !$cluster_conf->{ipset}->{$2}; | |
1186 | push @cmd, "-m set --match-set PVEFW-$2 dst"; | |
1187 | ||
1188 | } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){ | |
1189 | push @cmd, "-m iprange --dst-range $dest"; | |
1190 | ||
1191 | } else { | |
1192 | push @cmd, "-s $dest"; | |
1193 | } | |
1194 | } | |
1195 | ||
1196 | if ($rule->{proto}) { | |
1197 | push @cmd, "-p $rule->{proto}"; | |
1198 | ||
1199 | my $multiport = 0; | |
1200 | $multiport++ if $nbdport > 1; | |
1201 | $multiport++ if $nbsport > 1; | |
1202 | ||
1203 | push @cmd, "--match multiport" if $multiport; | |
1204 | ||
1205 | die "multiport: option '--sports' cannot be used together with '--dports'\n" | |
1206 | if ($multiport == 2) && ($rule->{dport} ne $rule->{sport}); | |
1207 | ||
1208 | if ($rule->{dport}) { | |
1209 | if ($rule->{proto} && $rule->{proto} eq 'icmp') { | |
1210 | # Note: we use dport to store --icmp-type | |
1211 | die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}}); | |
1212 | push @cmd, "-m icmp --icmp-type $rule->{dport}"; | |
1213 | } else { | |
1214 | if ($nbdport > 1) { | |
1215 | if ($multiport == 2) { | |
1216 | push @cmd, "--ports $rule->{dport}"; | |
1217 | } else { | |
1218 | push @cmd, "--dports $rule->{dport}"; | |
1219 | } | |
1220 | } else { | |
1221 | push @cmd, "--dport $rule->{dport}"; | |
1222 | } | |
1223 | } | |
1224 | } | |
1225 | ||
1226 | if ($rule->{sport}) { | |
1227 | if ($nbsport > 1) { | |
1228 | push @cmd, "--sports $rule->{sport}" if $multiport != 2; | |
1229 | } else { | |
1230 | push @cmd, "--sport $rule->{sport}"; | |
1231 | } | |
1232 | } | |
1233 | } elsif ($rule->{dport} || $rule->{sport}) { | |
1234 | warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport}; | |
1235 | warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport}; | |
1236 | } | |
1237 | ||
1238 | push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype}; | |
1239 | ||
1240 | if (my $action = $rule->{action}) { | |
1241 | $action = $actions->{$action} if defined($actions->{$action}); | |
1242 | $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK'; | |
1243 | push @cmd, $goto ? "-g $action" : "-j $action"; | |
1244 | } | |
1245 | ||
1246 | return scalar(@cmd) ? join(' ', @cmd) : undef; | |
1247 | } | |
1248 | ||
1249 | sub ruleset_generate_rule { | |
1250 | my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_; | |
1251 | ||
1252 | my $rules; | |
1253 | ||
1254 | if ($rule->{macro}) { | |
1255 | $rules = &$apply_macro($rule->{macro}, $rule); | |
1256 | } else { | |
1257 | $rules = [ $rule ]; | |
1258 | } | |
1259 | ||
1260 | foreach my $tmp (@$rules) { | |
1261 | if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) { | |
1262 | ruleset_addrule($ruleset, $chain, $cmdstr); | |
1263 | } | |
1264 | } | |
1265 | } | |
1266 | ||
1267 | sub ruleset_generate_rule_insert { | |
1268 | my ($ruleset, $chain, $rule, $actions, $goto) = @_; | |
1269 | ||
1270 | die "implement me" if $rule->{macro}; # not implemented, because not needed so far | |
1271 | ||
1272 | if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) { | |
1273 | ruleset_insertrule($ruleset, $chain, $cmdstr); | |
1274 | } | |
1275 | } | |
1276 | ||
1277 | sub ruleset_create_chain { | |
1278 | my ($ruleset, $chain) = @_; | |
1279 | ||
1280 | die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28; | |
1281 | die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format | |
1282 | ||
1283 | die "chain '$chain' already exists\n" if $ruleset->{$chain}; | |
1284 | ||
1285 | $ruleset->{$chain} = []; | |
1286 | } | |
1287 | ||
1288 | sub ruleset_chain_exist { | |
1289 | my ($ruleset, $chain) = @_; | |
1290 | ||
1291 | return $ruleset->{$chain} ? 1 : undef; | |
1292 | } | |
1293 | ||
1294 | sub ruleset_addrule { | |
1295 | my ($ruleset, $chain, $rule) = @_; | |
1296 | ||
1297 | die "no such chain '$chain'\n" if !$ruleset->{$chain}; | |
1298 | ||
1299 | push @{$ruleset->{$chain}}, "-A $chain $rule"; | |
1300 | } | |
1301 | ||
1302 | sub ruleset_insertrule { | |
1303 | my ($ruleset, $chain, $rule) = @_; | |
1304 | ||
1305 | die "no such chain '$chain'\n" if !$ruleset->{$chain}; | |
1306 | ||
1307 | unshift @{$ruleset->{$chain}}, "-A $chain $rule"; | |
1308 | } | |
1309 | ||
1310 | sub get_log_rule_base { | |
1311 | my ($chain, $vmid, $msg, $loglevel) = @_; | |
1312 | ||
1313 | die "internal error - no log level" if !defined($loglevel); | |
1314 | ||
1315 | $vmid = 0 if !defined($vmid); | |
1316 | ||
1317 | # Note: we use special format for prefix to pass further | |
1318 | # info to log daemon (VMID, LOGVELEL and CHAIN) | |
1319 | ||
1320 | return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\""; | |
1321 | } | |
1322 | ||
1323 | sub ruleset_addlog { | |
1324 | my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_; | |
1325 | ||
1326 | return if !defined($loglevel); | |
1327 | ||
1328 | my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel); | |
1329 | ||
1330 | $logrule = "$rule $logrule" if defined($rule); | |
1331 | ||
1332 | ruleset_addrule($ruleset, $chain, $logrule) | |
1333 | } | |
1334 | ||
1335 | sub generate_bridge_chains { | |
1336 | my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_; | |
1337 | ||
1338 | my $options = $hostfw_conf->{options} || {}; | |
1339 | ||
1340 | die "error: detected direct route to bridge '$bridge'\n" | |
1341 | if !$options->{allow_bridge_route} && $routing_table->{$bridge}; | |
1342 | ||
1343 | if (!ruleset_chain_exist($ruleset, "$bridge-FW")) { | |
1344 | ruleset_create_chain($ruleset, "$bridge-FW"); | |
1345 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-out -j $bridge-FW"); | |
1346 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-in -j $bridge-FW"); | |
1347 | } | |
1348 | ||
1349 | if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) { | |
1350 | ruleset_create_chain($ruleset, "$bridge-OUT"); | |
1351 | ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-in -j $bridge-OUT"); | |
1352 | ruleset_insertrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-in -j $bridge-OUT"); | |
1353 | } | |
1354 | ||
1355 | if (!ruleset_chain_exist($ruleset, "$bridge-IN")) { | |
1356 | ruleset_create_chain($ruleset, "$bridge-IN"); | |
1357 | ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j $bridge-IN"); | |
1358 | ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT"); | |
1359 | # accept traffic to unmanaged bridge ports | |
1360 | ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j ACCEPT "); | |
1361 | } | |
1362 | } | |
1363 | ||
1364 | sub ruleset_add_chain_policy { | |
1365 | my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_; | |
1366 | ||
1367 | if ($policy eq 'ACCEPT') { | |
1368 | ||
1369 | ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' }, | |
1370 | { ACCEPT => $accept_action}); | |
1371 | ||
1372 | } elsif ($policy eq 'DROP') { | |
1373 | ||
1374 | ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop"); | |
1375 | ||
1376 | ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel); | |
1377 | ||
1378 | ruleset_addrule($ruleset, $chain, "-j DROP"); | |
1379 | } elsif ($policy eq 'REJECT') { | |
1380 | ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject"); | |
1381 | ||
1382 | ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel); | |
1383 | ||
1384 | ruleset_addrule($ruleset, $chain, "-g PVEFW-reject"); | |
1385 | } else { | |
1386 | # should not happen | |
1387 | die "internal error: unknown policy '$policy'"; | |
1388 | } | |
1389 | } | |
1390 | ||
1391 | sub ruleset_create_vm_chain { | |
1392 | my ($ruleset, $chain, $options, $macaddr, $direction) = @_; | |
1393 | ||
1394 | ruleset_create_chain($ruleset, $chain); | |
1395 | my $accept = generate_nfqueue($options); | |
1396 | ||
1397 | if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) { | |
1398 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs"); | |
1399 | } | |
1400 | ||
1401 | if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) { | |
1402 | if ($direction eq 'OUT') { | |
1403 | ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK', | |
1404 | proto => 'udp', sport => 68, dport => 67 }); | |
1405 | } else { | |
1406 | ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT', | |
1407 | proto => 'udp', sport => 67, dport => 68 }); | |
1408 | } | |
1409 | } | |
1410 | ||
1411 | if ($options->{tcpflags}) { | |
1412 | ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags"); | |
1413 | } | |
1414 | ||
1415 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP"); | |
1416 | if ($direction eq 'OUT') { | |
1417 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -g PVEFW-SET-ACCEPT-MARK"); | |
1418 | } else { | |
1419 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept"); | |
1420 | } | |
1421 | ||
1422 | if ($direction eq 'OUT') { | |
1423 | if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) { | |
1424 | ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP"); | |
1425 | } | |
1426 | ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark | |
1427 | } | |
1428 | } | |
1429 | ||
1430 | sub ruleset_generate_vm_rules { | |
1431 | my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_; | |
1432 | ||
1433 | my $lc_direction = lc($direction); | |
1434 | ||
1435 | foreach my $rule (@$rules) { | |
1436 | next if $rule->{iface} && $rule->{iface} ne $netid; | |
1437 | next if !$rule->{enable}; | |
1438 | if ($rule->{type} eq 'group') { | |
1439 | my $group_chain = "GROUP-$rule->{action}-$direction"; | |
1440 | if(!ruleset_chain_exist($ruleset, $group_chain)){ | |
1441 | generate_group_rules($ruleset, $cluster_conf, $rule->{action}); | |
1442 | } | |
1443 | ruleset_addrule($ruleset, $chain, "-j $group_chain"); | |
1444 | if ($direction eq 'OUT'){ | |
1445 | ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j RETURN"); | |
1446 | }else{ | |
1447 | my $accept = generate_nfqueue($options); | |
1448 | ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $accept"); | |
1449 | } | |
1450 | ||
1451 | } else { | |
1452 | next if $rule->{type} ne $lc_direction; | |
1453 | if ($direction eq 'OUT') { | |
1454 | ruleset_generate_rule($ruleset, $chain, $rule, | |
1455 | { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf); | |
1456 | } else { | |
1457 | my $accept = generate_nfqueue($options); | |
1458 | ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept , REJECT => "PVEFW-reject" }, undef, $cluster_conf); | |
1459 | } | |
1460 | } | |
1461 | } | |
1462 | } | |
1463 | ||
1464 | sub generate_nfqueue { | |
1465 | my ($options) = @_; | |
1466 | ||
1467 | my $action = ""; | |
1468 | if($options->{ips}){ | |
1469 | $action = "NFQUEUE"; | |
1470 | if($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) { | |
1471 | if(defined($3) && defined($1)) { | |
1472 | $action .= " --queue-balance $1:$3"; | |
1473 | }elsif (defined($1)) { | |
1474 | $action .= " --queue-num $1"; | |
1475 | } | |
1476 | } | |
1477 | $action .= " --queue-bypass"; | |
1478 | }else{ | |
1479 | $action = "ACCEPT"; | |
1480 | } | |
1481 | ||
1482 | return $action; | |
1483 | } | |
1484 | ||
1485 | sub ruleset_generate_vm_ipsrules { | |
1486 | my ($ruleset, $options, $direction, $iface, $bridge) = @_; | |
1487 | ||
1488 | if ($options->{ips} && $direction eq 'IN') { | |
1489 | my $nfqueue = generate_nfqueue($options); | |
1490 | ||
1491 | if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) { | |
1492 | ruleset_create_chain($ruleset, "PVEFW-IPS"); | |
1493 | } | |
1494 | ||
1495 | if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) { | |
1496 | ruleset_create_chain($ruleset, "$bridge-IPS"); | |
1497 | ruleset_insertrule($ruleset, "PVEFW-IPS", "-o $bridge -m physdev --physdev-is-out -j $bridge-IPS"); | |
1498 | } | |
1499 | ||
1500 | ruleset_addrule($ruleset, "$bridge-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue"); | |
1501 | } | |
1502 | } | |
1503 | ||
1504 | sub generate_venet_rules_direction { | |
1505 | my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_; | |
1506 | ||
1507 | parse_address_list($ip); # make sure we have a valid $ip list | |
1508 | ||
1509 | my $lc_direction = lc($direction); | |
1510 | ||
1511 | my $rules = $vmfw_conf->{rules}; | |
1512 | ||
1513 | my $options = $vmfw_conf->{options}; | |
1514 | my $loglevel = get_option_log_level($options, "log_level_${lc_direction}"); | |
1515 | ||
1516 | my $chain = "venet0-$vmid-$direction"; | |
1517 | ||
1518 | ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction); | |
1519 | ||
1520 | ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction); | |
1521 | ||
1522 | # implement policy | |
1523 | my $policy; | |
1524 | ||
1525 | if ($direction eq 'OUT') { | |
1526 | $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default | |
1527 | } else { | |
1528 | $policy = $options->{policy_in} || 'DROP'; # allow nothing by default | |
1529 | } | |
1530 | ||
1531 | my $accept = generate_nfqueue($options); | |
1532 | my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept; | |
1533 | ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action); | |
1534 | ||
1535 | # plug into FORWARD, INPUT and OUTPUT chain | |
1536 | if ($direction eq 'OUT') { | |
1537 | ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD", { | |
1538 | action => $chain, | |
1539 | source => $ip, | |
1540 | iface_in => 'venet0'}); | |
1541 | ||
1542 | ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT", { | |
1543 | action => $chain, | |
1544 | source => $ip, | |
1545 | iface_in => 'venet0'}); | |
1546 | } else { | |
1547 | ruleset_generate_rule($ruleset, "PVEFW-FORWARD", { | |
1548 | action => $chain, | |
1549 | dest => $ip, | |
1550 | iface_out => 'venet0'}); | |
1551 | ||
1552 | ruleset_generate_rule($ruleset, "PVEFW-OUTPUT", { | |
1553 | action => $chain, | |
1554 | dest => $ip, | |
1555 | iface_out => 'venet0'}); | |
1556 | } | |
1557 | } | |
1558 | ||
1559 | sub generate_tap_rules_direction { | |
1560 | my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_; | |
1561 | ||
1562 | my $lc_direction = lc($direction); | |
1563 | ||
1564 | my $rules = $vmfw_conf->{rules}; | |
1565 | ||
1566 | my $options = $vmfw_conf->{options}; | |
1567 | my $loglevel = get_option_log_level($options, "log_level_${lc_direction}"); | |
1568 | ||
1569 | my $tapchain = "$iface-$direction"; | |
1570 | ||
1571 | ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction); | |
1572 | ||
1573 | ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options); | |
1574 | ||
1575 | ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface, $bridge); | |
1576 | ||
1577 | # implement policy | |
1578 | my $policy; | |
1579 | ||
1580 | if ($direction eq 'OUT') { | |
1581 | $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default | |
1582 | } else { | |
1583 | $policy = $options->{policy_in} || 'DROP'; # allow nothing by default | |
1584 | } | |
1585 | ||
1586 | my $accept = generate_nfqueue($options); | |
1587 | my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept; | |
1588 | ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action); | |
1589 | ||
1590 | # plug the tap chain to bridge chain | |
1591 | if ($direction eq 'IN') { | |
1592 | ruleset_insertrule($ruleset, "$bridge-IN", | |
1593 | "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain"); | |
1594 | } else { | |
1595 | ruleset_insertrule($ruleset, "$bridge-OUT", | |
1596 | "-m physdev --physdev-in $iface -j $tapchain"); | |
1597 | } | |
1598 | } | |
1599 | ||
1600 | sub enable_host_firewall { | |
1601 | my ($ruleset, $hostfw_conf, $cluster_conf) = @_; | |
1602 | ||
1603 | # fixme: allow security groups | |
1604 | ||
1605 | my $options = $hostfw_conf->{options}; | |
1606 | my $rules = $hostfw_conf->{rules}; | |
1607 | ||
1608 | # host inbound firewall | |
1609 | my $chain = "PVEFW-HOST-IN"; | |
1610 | ruleset_create_chain($ruleset, $chain); | |
1611 | ||
1612 | my $loglevel = get_option_log_level($options, "log_level_in"); | |
1613 | ||
1614 | if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) { | |
1615 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs"); | |
1616 | } | |
1617 | ||
1618 | if ($options->{tcpflags}) { | |
1619 | ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags"); | |
1620 | } | |
1621 | ||
1622 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP"); | |
1623 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT"); | |
1624 | ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT"); | |
1625 | ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT"); | |
1626 | ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT"); | |
1627 | ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync | |
1628 | ||
1629 | # we use RETURN because we need to check also tap rules | |
1630 | my $accept_action = 'RETURN'; | |
1631 | ||
1632 | foreach my $rule (@$rules) { | |
1633 | next if $rule->{type} ne 'in'; | |
1634 | ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf); | |
1635 | } | |
1636 | ||
1637 | # implement input policy | |
1638 | my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default | |
1639 | ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action); | |
1640 | ||
1641 | # host outbound firewall | |
1642 | $chain = "PVEFW-HOST-OUT"; | |
1643 | ruleset_create_chain($ruleset, $chain); | |
1644 | ||
1645 | $loglevel = get_option_log_level($options, "log_level_out"); | |
1646 | ||
1647 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP"); | |
1648 | ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT"); | |
1649 | ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT"); | |
1650 | ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT"); | |
1651 | ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT"); | |
1652 | ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync | |
1653 | ||
1654 | # we use RETURN because we may want to check other thigs later | |
1655 | $accept_action = 'RETURN'; | |
1656 | ||
1657 | foreach my $rule (@$rules) { | |
1658 | next if $rule->{type} ne 'out'; | |
1659 | ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf); | |
1660 | } | |
1661 | ||
1662 | # implement output policy | |
1663 | $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default | |
1664 | ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action); | |
1665 | ||
1666 | ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT"); | |
1667 | ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN"); | |
1668 | } | |
1669 | ||
1670 | sub generate_group_rules { | |
1671 | my ($ruleset, $cluster_conf, $group) = @_; | |
1672 | die "no such security group '$group'\n" if !$cluster_conf->{groups}->{$group}; | |
1673 | ||
1674 | my $rules = $cluster_conf->{groups}->{$group}; | |
1675 | ||
1676 | my $chain = "GROUP-${group}-IN"; | |
1677 | ||
1678 | ruleset_create_chain($ruleset, $chain); | |
1679 | ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark | |
1680 | ||
1681 | foreach my $rule (@$rules) { | |
1682 | next if $rule->{type} ne 'in'; | |
1683 | ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf); | |
1684 | } | |
1685 | ||
1686 | $chain = "GROUP-${group}-OUT"; | |
1687 | ||
1688 | ruleset_create_chain($ruleset, $chain); | |
1689 | ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark | |
1690 | ||
1691 | foreach my $rule (@$rules) { | |
1692 | next if $rule->{type} ne 'out'; | |
1693 | # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to | |
1694 | # check also other tap rules later | |
1695 | ruleset_generate_rule($ruleset, $chain, $rule, | |
1696 | { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf); | |
1697 | } | |
1698 | } | |
1699 | ||
1700 | my $MAX_NETS = 32; | |
1701 | my $valid_netdev_names = {}; | |
1702 | for (my $i = 0; $i < $MAX_NETS; $i++) { | |
1703 | $valid_netdev_names->{"net$i"} = 1; | |
1704 | } | |
1705 | ||
1706 | sub parse_fw_rule { | |
1707 | my ($line, $need_iface, $allow_groups) = @_; | |
1708 | ||
1709 | my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport); | |
1710 | ||
1711 | # we can add single line comments to the end of the rule | |
1712 | my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//; | |
1713 | ||
1714 | # we can disable a rule when prefixed with '|' | |
1715 | my $enable = 1; | |
1716 | ||
1717 | $enable = 0 if $line =~ s/^\|//; | |
1718 | ||
1719 | my @data = split(/\s+/, $line); | |
1720 | my $expected_elements = $need_iface ? 8 : 7; | |
1721 | ||
1722 | die "wrong number of rule elements\n" if scalar(@data) > $expected_elements; | |
1723 | ||
1724 | if ($need_iface) { | |
1725 | ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data | |
1726 | } else { | |
1727 | ($type, $action, $source, $dest, $proto, $dport, $sport) = @data; | |
1728 | } | |
1729 | ||
1730 | die "incomplete rule\n" if ! ($type && $action); | |
1731 | ||
1732 | my $macro; | |
1733 | ||
1734 | $type = lc($type); | |
1735 | ||
1736 | if ($type eq 'in' || $type eq 'out') { | |
1737 | if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) { | |
1738 | # OK | |
1739 | } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) { | |
1740 | $action = $2; | |
1741 | my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)}; | |
1742 | die "unknown macro '$1'\n" if !$preferred_name; | |
1743 | $macro = $preferred_name; | |
1744 | } else { | |
1745 | die "unknown action '$action'\n"; | |
1746 | } | |
1747 | } elsif ($type eq 'group') { | |
1748 | die "wrong number of rule elements\n" if scalar(@data) != 3; | |
1749 | die "groups disabled\n" if !$allow_groups; | |
1750 | ||
1751 | die "invalid characters in group name\n" if $action !~ m/^${security_group_pattern}$/; | |
1752 | } else { | |
1753 | die "unknown rule type '$type'\n"; | |
1754 | } | |
1755 | ||
1756 | if ($need_iface) { | |
1757 | $iface = undef if $iface && $iface eq '-'; | |
1758 | } | |
1759 | ||
1760 | $proto = undef if $proto && $proto eq '-'; | |
1761 | pve_fw_verify_protocol_spec($proto) if $proto; | |
1762 | ||
1763 | $source = undef if $source && $source eq '-'; | |
1764 | $dest = undef if $dest && $dest eq '-'; | |
1765 | ||
1766 | $dport = undef if $dport && $dport eq '-'; | |
1767 | $sport = undef if $sport && $sport eq '-'; | |
1768 | ||
1769 | parse_port_name_number_or_range($dport) if defined($dport); | |
1770 | parse_port_name_number_or_range($sport) if defined($sport); | |
1771 | ||
1772 | parse_address_list($source) if $source; | |
1773 | parse_address_list($dest) if $dest; | |
1774 | ||
1775 | return { | |
1776 | type => $type, | |
1777 | enable => $enable, | |
1778 | comment => $comment, | |
1779 | action => $action, | |
1780 | macro => $macro, | |
1781 | iface => $iface, | |
1782 | source => $source, | |
1783 | dest => $dest, | |
1784 | proto => $proto, | |
1785 | dport => $dport, | |
1786 | sport => $sport, | |
1787 | }; | |
1788 | } | |
1789 | ||
1790 | sub parse_vmfw_option { | |
1791 | my ($line) = @_; | |
1792 | ||
1793 | my ($opt, $value); | |
1794 | ||
1795 | my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog"; | |
1796 | ||
1797 | if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags|ips):\s*(0|1)\s*$/i) { | |
1798 | $opt = lc($1); | |
1799 | $value = int($2); | |
1800 | } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) { | |
1801 | $opt = lc($1); | |
1802 | $value = $2 ? lc($3) : ''; | |
1803 | } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) { | |
1804 | $opt = lc($1); | |
1805 | $value = uc($3); | |
1806 | } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) { | |
1807 | $opt = lc($1); | |
1808 | $value = $2; | |
1809 | } else { | |
1810 | chomp $line; | |
1811 | die "can't parse option '$line'\n" | |
1812 | } | |
1813 | ||
1814 | return ($opt, $value); | |
1815 | } | |
1816 | ||
1817 | sub parse_hostfw_option { | |
1818 | my ($line) = @_; | |
1819 | ||
1820 | my ($opt, $value); | |
1821 | ||
1822 | my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog"; | |
1823 | ||
1824 | if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags|allow_bridge_route|optimize):\s*(0|1)\s*$/i) { | |
1825 | $opt = lc($1); | |
1826 | $value = int($2); | |
1827 | } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) { | |
1828 | $opt = lc($1); | |
1829 | $value = $2 ? lc($3) : ''; | |
1830 | } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) { | |
1831 | $opt = lc($1); | |
1832 | $value = uc($3); | |
1833 | } elsif ($line =~ m/^(nf_conntrack_max):\s*(\d+)\s*$/i) { | |
1834 | $opt = lc($1); | |
1835 | $value = int($2); | |
1836 | } else { | |
1837 | chomp $line; | |
1838 | die "can't parse option '$line'\n" | |
1839 | } | |
1840 | ||
1841 | return ($opt, $value); | |
1842 | } | |
1843 | ||
1844 | sub parse_clusterfw_option { | |
1845 | my ($line) = @_; | |
1846 | ||
1847 | my ($opt, $value); | |
1848 | ||
1849 | if ($line =~ m/^(enable):\s*(0|1)\s*$/i) { | |
1850 | $opt = lc($1); | |
1851 | $value = int($2); | |
1852 | } else { | |
1853 | chomp $line; | |
1854 | die "can't parse option '$line'\n" | |
1855 | } | |
1856 | ||
1857 | return ($opt, $value); | |
1858 | } | |
1859 | ||
1860 | sub parse_vm_fw_rules { | |
1861 | my ($filename, $fh) = @_; | |
1862 | ||
1863 | my $res = { rules => [], options => {}}; | |
1864 | ||
1865 | my $section; | |
1866 | ||
1867 | my $digest = Digest::SHA->new('sha1'); | |
1868 | ||
1869 | while (defined(my $line = <$fh>)) { | |
1870 | $digest->add($line); | |
1871 | ||
1872 | next if $line =~ m/^#/; | |
1873 | next if $line =~ m/^\s*$/; | |
1874 | ||
1875 | my $linenr = $fh->input_line_number(); | |
1876 | my $prefix = "$filename (line $linenr)"; | |
1877 | ||
1878 | if ($line =~ m/^\[(\S+)\]\s*$/i) { | |
1879 | $section = lc($1); | |
1880 | warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section}; | |
1881 | next; | |
1882 | } | |
1883 | if (!$section) { | |
1884 | warn "$prefix: skip line - no section"; | |
1885 | next; | |
1886 | } | |
1887 | ||
1888 | next if !$res->{$section}; # skip undefined section | |
1889 | ||
1890 | if ($section eq 'options') { | |
1891 | eval { | |
1892 | my ($opt, $value) = parse_vmfw_option($line); | |
1893 | $res->{options}->{$opt} = $value; | |
1894 | }; | |
1895 | warn "$prefix: $@" if $@; | |
1896 | next; | |
1897 | } | |
1898 | ||
1899 | my $rule; | |
1900 | eval { $rule = parse_fw_rule($line, 1, 1); }; | |
1901 | if (my $err = $@) { | |
1902 | warn "$prefix: $err"; | |
1903 | next; | |
1904 | } | |
1905 | ||
1906 | push @{$res->{$section}}, $rule; | |
1907 | } | |
1908 | ||
1909 | $res->{digest} = $digest->b64digest; | |
1910 | ||
1911 | return $res; | |
1912 | } | |
1913 | ||
1914 | sub parse_host_fw_rules { | |
1915 | my ($filename, $fh) = @_; | |
1916 | ||
1917 | my $res = { rules => [], options => {}}; | |
1918 | ||
1919 | my $section; | |
1920 | ||
1921 | my $digest = Digest::SHA->new('sha1'); | |
1922 | ||
1923 | while (defined(my $line = <$fh>)) { | |
1924 | $digest->add($line); | |
1925 | ||
1926 | next if $line =~ m/^#/; | |
1927 | next if $line =~ m/^\s*$/; | |
1928 | ||
1929 | my $linenr = $fh->input_line_number(); | |
1930 | my $prefix = "$filename (line $linenr)"; | |
1931 | ||
1932 | if ($line =~ m/^\[(\S+)\]\s*$/i) { | |
1933 | $section = lc($1); | |
1934 | warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section}; | |
1935 | next; | |
1936 | } | |
1937 | if (!$section) { | |
1938 | warn "$prefix: skip line - no section"; | |
1939 | next; | |
1940 | } | |
1941 | ||
1942 | next if !$res->{$section}; # skip undefined section | |
1943 | ||
1944 | if ($section eq 'options') { | |
1945 | eval { | |
1946 | my ($opt, $value) = parse_hostfw_option($line); | |
1947 | $res->{options}->{$opt} = $value; | |
1948 | }; | |
1949 | warn "$prefix: $@" if $@; | |
1950 | next; | |
1951 | } | |
1952 | ||
1953 | my $rule; | |
1954 | eval { $rule = parse_fw_rule($line, 1, 1); }; | |
1955 | if (my $err = $@) { | |
1956 | warn "$prefix: $err"; | |
1957 | next; | |
1958 | } | |
1959 | ||
1960 | push @{$res->{$section}}, $rule; | |
1961 | } | |
1962 | ||
1963 | $res->{digest} = $digest->b64digest; | |
1964 | ||
1965 | return $res; | |
1966 | } | |
1967 | ||
1968 | sub parse_cluster_fw_rules { | |
1969 | my ($filename, $fh) = @_; | |
1970 | ||
1971 | my $section; | |
1972 | my $group; | |
1973 | ||
1974 | my $res = { | |
1975 | rules => [], | |
1976 | options => {}, | |
1977 | groups => {}, | |
1978 | group_comments => {}, | |
1979 | ipset => {} , | |
1980 | ipset_comments => {}, | |
1981 | }; | |
1982 | ||
1983 | my $digest = Digest::SHA->new('sha1'); | |
1984 | ||
1985 | while (defined(my $line = <$fh>)) { | |
1986 | $digest->add($line); | |
1987 | ||
1988 | next if $line =~ m/^#/; | |
1989 | next if $line =~ m/^\s*$/; | |
1990 | ||
1991 | my $linenr = $fh->input_line_number(); | |
1992 | my $prefix = "$filename (line $linenr)"; | |
1993 | ||
1994 | if ($line =~ m/^\[options\]$/i) { | |
1995 | $section = 'options'; | |
1996 | next; | |
1997 | } | |
1998 | ||
1999 | if ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) { | |
2000 | $section = 'groups'; | |
2001 | $group = lc($1); | |
2002 | my $comment = $2; | |
2003 | $res->{$section}->{$group} = []; | |
2004 | $res->{group_comments}->{$group} = decode('utf8', $comment) | |
2005 | if $comment; | |
2006 | next; | |
2007 | } | |
2008 | ||
2009 | if ($line =~ m/^\[rules\]$/i) { | |
2010 | $section = 'rules'; | |
2011 | next; | |
2012 | } | |
2013 | ||
2014 | if ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) { | |
2015 | $section = 'ipset'; | |
2016 | $group = lc($1); | |
2017 | my $comment = $2; | |
2018 | $res->{$section}->{$group} = []; | |
2019 | $res->{ipset_comments}->{$group} = decode('utf8', $comment) | |
2020 | if $comment; | |
2021 | next; | |
2022 | } | |
2023 | ||
2024 | if (!$section) { | |
2025 | warn "$prefix: skip line - no section\n"; | |
2026 | next; | |
2027 | } | |
2028 | ||
2029 | if ($section eq 'options') { | |
2030 | eval { | |
2031 | my ($opt, $value) = parse_clusterfw_option($line); | |
2032 | $res->{options}->{$opt} = $value; | |
2033 | }; | |
2034 | warn "$prefix: $@" if $@; | |
2035 | } elsif ($section eq 'rules') { | |
2036 | my $rule; | |
2037 | eval { $rule = parse_fw_rule($line, 1, 1); }; | |
2038 | if (my $err = $@) { | |
2039 | warn "$prefix: $err"; | |
2040 | next; | |
2041 | } | |
2042 | push @{$res->{$section}}, $rule; | |
2043 | } elsif ($section eq 'groups') { | |
2044 | my $rule; | |
2045 | eval { $rule = parse_fw_rule($line, 0, 0); }; | |
2046 | if (my $err = $@) { | |
2047 | warn "$prefix: $err"; | |
2048 | next; | |
2049 | } | |
2050 | push @{$res->{$section}->{$group}}, $rule; | |
2051 | } elsif ($section eq 'ipset') { | |
2052 | # we can add single line comments to the end of the rule | |
2053 | my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//; | |
2054 | ||
2055 | $line =~ m/^(\!)?\s*(\S+)\s*$/; | |
2056 | my $nomatch = $1; | |
2057 | my $cidr = $2; | |
2058 | ||
2059 | $cidr =~ s|/32$||; | |
2060 | ||
2061 | eval { pve_verify_ipv4_or_cidr($cidr); }; | |
2062 | if (my $err = $@) { | |
2063 | warn "$prefix: $cidr - $err"; | |
2064 | next; | |
2065 | } | |
2066 | ||
2067 | my $entry = { cidr => $cidr }; | |
2068 | $entry->{nomatch} = 1 if $nomatch; | |
2069 | $entry->{comment} = $comment if $comment; | |
2070 | ||
2071 | push @{$res->{$section}->{$group}}, $entry; | |
2072 | } | |
2073 | } | |
2074 | ||
2075 | $res->{digest} = $digest->b64digest; | |
2076 | return $res; | |
2077 | } | |
2078 | ||
2079 | sub run_locked { | |
2080 | my ($code, @param) = @_; | |
2081 | ||
2082 | my $timeout = 10; | |
2083 | ||
2084 | my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param); | |
2085 | ||
2086 | die $@ if $@; | |
2087 | ||
2088 | return $res; | |
2089 | } | |
2090 | ||
2091 | sub read_local_vm_config { | |
2092 | ||
2093 | my $openvz = {}; | |
2094 | my $qemu = {}; | |
2095 | ||
2096 | my $vmdata = { openvz => $openvz, qemu => $qemu }; | |
2097 | ||
2098 | my $vmlist = PVE::Cluster::get_vmlist(); | |
2099 | return $vmdata if !$vmlist || !$vmlist->{ids}; | |
2100 | my $ids = $vmlist->{ids}; | |
2101 | ||
2102 | foreach my $vmid (keys %$ids) { | |
2103 | next if !$vmid; # skip VE0 | |
2104 | my $d = $ids->{$vmid}; | |
2105 | next if !$d->{node} || $d->{node} ne $nodename; | |
2106 | next if !$d->{type}; | |
2107 | if ($d->{type} eq 'openvz') { | |
2108 | if ($have_pve_manager) { | |
2109 | my $cfspath = PVE::OpenVZ::cfs_config_path($vmid); | |
2110 | if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) { | |
2111 | $openvz->{$vmid} = $conf; | |
2112 | } | |
2113 | } | |
2114 | } elsif ($d->{type} eq 'qemu') { | |
2115 | if ($have_qemu_server) { | |
2116 | my $cfspath = PVE::QemuServer::cfs_config_path($vmid); | |
2117 | if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) { | |
2118 | $qemu->{$vmid} = $conf; | |
2119 | } | |
2120 | } | |
2121 | } | |
2122 | } | |
2123 | ||
2124 | return $vmdata; | |
2125 | }; | |
2126 | ||
2127 | sub load_vmfw_conf { | |
2128 | my ($vmid) = @_; | |
2129 | ||
2130 | my $vmfw_conf = {}; | |
2131 | ||
2132 | my $filename = "/etc/pve/firewall/$vmid.fw"; | |
2133 | if (my $fh = IO::File->new($filename, O_RDONLY)) { | |
2134 | $vmfw_conf = parse_vm_fw_rules($filename, $fh); | |
2135 | } | |
2136 | ||
2137 | return $vmfw_conf; | |
2138 | } | |
2139 | ||
2140 | my $format_rules = sub { | |
2141 | my ($rules, $need_iface) = @_; | |
2142 | ||
2143 | my $raw = ''; | |
2144 | ||
2145 | foreach my $rule (@$rules) { | |
2146 | if ($rule->{type} eq 'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') { | |
2147 | $raw .= '|' if defined($rule->{enable}) && !$rule->{enable}; | |
2148 | $raw .= uc($rule->{type}); | |
2149 | if ($rule->{macro}) { | |
2150 | $raw .= " $rule->{macro}($rule->{action})"; | |
2151 | } else { | |
2152 | $raw .= " " . $rule->{action}; | |
2153 | } | |
2154 | $raw .= " " . ($rule->{iface} || '-') if $need_iface; | |
2155 | ||
2156 | if ($rule->{type} ne 'group') { | |
2157 | $raw .= " " . ($rule->{source} || '-'); | |
2158 | $raw .= " " . ($rule->{dest} || '-'); | |
2159 | $raw .= " " . ($rule->{proto} || '-'); | |
2160 | $raw .= " " . ($rule->{dport} || '-'); | |
2161 | $raw .= " " . ($rule->{sport} || '-'); | |
2162 | } | |
2163 | ||
2164 | $raw .= " # " . encode('utf8', $rule->{comment}) | |
2165 | if $rule->{comment} && $rule->{comment} !~ m/^\s*$/; | |
2166 | $raw .= "\n"; | |
2167 | } else { | |
2168 | die "unknown rule type '$rule->{type}'"; | |
2169 | } | |
2170 | } | |
2171 | ||
2172 | return $raw; | |
2173 | }; | |
2174 | ||
2175 | my $format_options = sub { | |
2176 | my ($options) = @_; | |
2177 | ||
2178 | my $raw = ''; | |
2179 | ||
2180 | $raw .= "[OPTIONS]\n\n"; | |
2181 | foreach my $opt (keys %$options) { | |
2182 | $raw .= "$opt: $options->{$opt}\n"; | |
2183 | } | |
2184 | $raw .= "\n"; | |
2185 | ||
2186 | return $raw; | |
2187 | }; | |
2188 | ||
2189 | my $format_ipset = sub { | |
2190 | my ($options) = @_; | |
2191 | ||
2192 | my $raw = ''; | |
2193 | ||
2194 | my $nethash = {}; | |
2195 | foreach my $entry (@$options) { | |
2196 | $nethash->{$entry->{cidr}} = $entry; | |
2197 | } | |
2198 | ||
2199 | foreach my $cidr (sort keys %$nethash) { | |
2200 | my $entry = $nethash->{$cidr}; | |
2201 | my $line = $entry->{nomatch} ? '!' : ''; | |
2202 | $line .= $entry->{cidr}; | |
2203 | $line .= " # " . encode('utf8', $entry->{comment}) | |
2204 | if $entry->{comment} && $entry->{comment} !~ m/^\s*$/; | |
2205 | $raw .= "$line\n"; | |
2206 | } | |
2207 | ||
2208 | return $raw; | |
2209 | }; | |
2210 | ||
2211 | sub save_vmfw_conf { | |
2212 | my ($vmid, $vmfw_conf) = @_; | |
2213 | ||
2214 | my $raw = ''; | |
2215 | ||
2216 | my $options = $vmfw_conf->{options}; | |
2217 | $raw .= &$format_options($options) if scalar(keys %$options); | |
2218 | ||
2219 | my $rules = $vmfw_conf->{rules}; | |
2220 | if (scalar(@$rules)) { | |
2221 | $raw .= "[RULES]\n\n"; | |
2222 | $raw .= &$format_rules($rules, 1); | |
2223 | $raw .= "\n"; | |
2224 | } | |
2225 | ||
2226 | my $filename = "/etc/pve/firewall/$vmid.fw"; | |
2227 | PVE::Tools::file_set_contents($filename, $raw); | |
2228 | } | |
2229 | ||
2230 | sub read_vm_firewall_configs { | |
2231 | my ($vmdata) = @_; | |
2232 | my $vmfw_configs = {}; | |
2233 | ||
2234 | foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) { | |
2235 | my $vmfw_conf = load_vmfw_conf($vmid); | |
2236 | next if !$vmfw_conf->{options}; # skip if file does not exists | |
2237 | $vmfw_configs->{$vmid} = $vmfw_conf; | |
2238 | } | |
2239 | ||
2240 | return $vmfw_configs; | |
2241 | } | |
2242 | ||
2243 | sub get_option_log_level { | |
2244 | my ($options, $k) = @_; | |
2245 | ||
2246 | my $v = $options->{$k}; | |
2247 | $v = $default_log_level if !defined($v); | |
2248 | ||
2249 | return undef if $v eq '' || $v eq 'nolog'; | |
2250 | ||
2251 | $v = $log_level_hash->{$v} if defined($log_level_hash->{$v}); | |
2252 | ||
2253 | return $v if ($v >= 0) && ($v <= 7); | |
2254 | ||
2255 | warn "unknown log level ($k = '$v')\n"; | |
2256 | ||
2257 | return undef; | |
2258 | } | |
2259 | ||
2260 | sub generate_std_chains { | |
2261 | my ($ruleset, $options) = @_; | |
2262 | ||
2263 | my $loglevel = get_option_log_level($options, 'smurf_log_level'); | |
2264 | ||
2265 | # same as shorewall smurflog. | |
2266 | my $chain = 'PVEFW-smurflog'; | |
2267 | ||
2268 | push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel; | |
2269 | push @{$pve_std_chains->{$chain}}, "-j DROP"; | |
2270 | ||
2271 | # same as shorewall logflags action. | |
2272 | $loglevel = get_option_log_level($options, 'tcp_flags_log_level'); | |
2273 | $chain = 'PVEFW-logflags'; | |
2274 | # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG) | |
2275 | push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel; | |
2276 | push @{$pve_std_chains->{$chain}}, "-j DROP"; | |
2277 | ||
2278 | foreach my $chain (keys %$pve_std_chains) { | |
2279 | ruleset_create_chain($ruleset, $chain); | |
2280 | foreach my $rule (@{$pve_std_chains->{$chain}}) { | |
2281 | if (ref($rule)) { | |
2282 | ruleset_generate_rule($ruleset, $chain, $rule); | |
2283 | } else { | |
2284 | ruleset_addrule($ruleset, $chain, $rule); | |
2285 | } | |
2286 | } | |
2287 | } | |
2288 | } | |
2289 | ||
2290 | sub generate_ipset_chains { | |
2291 | my ($ipset_ruleset, $fw_conf) = @_; | |
2292 | ||
2293 | foreach my $ipset (keys %{$fw_conf->{ipset}}) { | |
2294 | generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset}); | |
2295 | } | |
2296 | } | |
2297 | ||
2298 | sub generate_ipset { | |
2299 | my ($ipset_ruleset, $name, $options) = @_; | |
2300 | ||
2301 | my $hashsize = scalar(@$options); | |
2302 | if ($hashsize <= 64) { | |
2303 | $hashsize = 64; | |
2304 | } else { | |
2305 | $hashsize = round_powerof2($hashsize); | |
2306 | } | |
2307 | ||
2308 | push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize"; | |
2309 | ||
2310 | # remove duplicates | |
2311 | my $nethash = {}; | |
2312 | foreach my $entry (@$options) { | |
2313 | $nethash->{$entry->{cidr}} = $entry; | |
2314 | } | |
2315 | ||
2316 | foreach my $cidr (sort keys %$nethash) { | |
2317 | my $entry = $nethash->{$cidr}; | |
2318 | ||
2319 | my $cmd = "add $name $cidr"; | |
2320 | if ($entry->{nomatch}) { | |
2321 | if ($feature_ipset_nomatch) { | |
2322 | push @{$ipset_ruleset->{$name}}, "$cmd nomatch"; | |
2323 | } else { | |
2324 | warn "ignore !$cidr - nomatch not supported by kernel\n"; | |
2325 | } | |
2326 | } else { | |
2327 | push @{$ipset_ruleset->{$name}}, $cmd; | |
2328 | } | |
2329 | } | |
2330 | } | |
2331 | ||
2332 | sub round_powerof2 { | |
2333 | my ($int) = @_; | |
2334 | ||
2335 | $int--; | |
2336 | $int |= $int >> $_ foreach (1,2,4,8,16); | |
2337 | return ++$int; | |
2338 | } | |
2339 | ||
2340 | sub save_pvefw_status { | |
2341 | my ($status) = @_; | |
2342 | ||
2343 | die "unknown status '$status' - internal error" | |
2344 | if $status !~ m/^(stopped|active)$/; | |
2345 | ||
2346 | mkdir dirname($pve_fw_status_filename); | |
2347 | PVE::Tools::file_set_contents($pve_fw_status_filename, $status); | |
2348 | } | |
2349 | ||
2350 | sub read_pvefw_status { | |
2351 | ||
2352 | my $status = 'unknown'; | |
2353 | ||
2354 | return 'stopped' if ! -f $pve_fw_status_filename; | |
2355 | ||
2356 | eval { | |
2357 | $status = PVE::Tools::file_get_contents($pve_fw_status_filename); | |
2358 | }; | |
2359 | warn $@ if $@; | |
2360 | ||
2361 | return $status; | |
2362 | } | |
2363 | ||
2364 | # fixme: move to pve-common PVE::ProcFSTools | |
2365 | sub read_proc_net_route { | |
2366 | my $filename = "/proc/net/route"; | |
2367 | ||
2368 | my $res = {}; | |
2369 | ||
2370 | my $fh = IO::File->new ($filename, "r"); | |
2371 | return $res if !$fh; | |
2372 | ||
2373 | my $int_to_quad = sub { | |
2374 | return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0); | |
2375 | }; | |
2376 | ||
2377 | while (defined(my $line = <$fh>)) { | |
2378 | next if $line =~/^Iface\s+Destination/; # skip head | |
2379 | my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8]; | |
2380 | push @{$res->{$iface}}, { | |
2381 | dest => &$int_to_quad(hex($dest)), | |
2382 | gateway => &$int_to_quad(hex($gateway)), | |
2383 | mask => &$int_to_quad(hex($mask)), | |
2384 | metric => $metric, | |
2385 | mtu => $mtu, | |
2386 | }; | |
2387 | } | |
2388 | ||
2389 | return $res; | |
2390 | } | |
2391 | ||
2392 | sub load_clusterfw_conf { | |
2393 | ||
2394 | my $cluster_conf = {}; | |
2395 | if (my $fh = IO::File->new($clusterfw_conf_filename, O_RDONLY)) { | |
2396 | $cluster_conf = parse_cluster_fw_rules($clusterfw_conf_filename, $fh); | |
2397 | } | |
2398 | ||
2399 | return $cluster_conf; | |
2400 | } | |
2401 | ||
2402 | sub save_clusterfw_conf { | |
2403 | my ($cluster_conf) = @_; | |
2404 | ||
2405 | my $raw = ''; | |
2406 | ||
2407 | my $options = $cluster_conf->{options}; | |
2408 | $raw .= &$format_options($options) if scalar(keys %$options); | |
2409 | ||
2410 | foreach my $ipset (sort keys %{$cluster_conf->{ipset}}) { | |
2411 | if (my $comment = $cluster_conf->{ipset_comments}->{$ipset}) { | |
2412 | my $utf8comment = encode('utf8', $comment); | |
2413 | $raw .= "[IPSET $ipset] # $utf8comment\n\n"; | |
2414 | } else { | |
2415 | $raw .= "[IPSET $ipset]\n\n"; | |
2416 | } | |
2417 | my $options = $cluster_conf->{ipset}->{$ipset}; | |
2418 | $raw .= &$format_ipset($options); | |
2419 | $raw .= "\n"; | |
2420 | } | |
2421 | ||
2422 | my $rules = $cluster_conf->{rules}; | |
2423 | if (scalar(@$rules)) { | |
2424 | $raw .= "[RULES]\n\n"; | |
2425 | $raw .= &$format_rules($rules, 1); | |
2426 | $raw .= "\n"; | |
2427 | } | |
2428 | ||
2429 | foreach my $group (sort keys %{$cluster_conf->{groups}}) { | |
2430 | my $rules = $cluster_conf->{groups}->{$group}; | |
2431 | if (my $comment = $cluster_conf->{group_comments}->{$group}) { | |
2432 | my $utf8comment = encode('utf8', $comment); | |
2433 | $raw .= "[group $group] # $utf8comment\n\n"; | |
2434 | } else { | |
2435 | $raw .= "[group $group]\n\n"; | |
2436 | } | |
2437 | ||
2438 | $raw .= &$format_rules($rules, 0); | |
2439 | $raw .= "\n"; | |
2440 | } | |
2441 | ||
2442 | PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw); | |
2443 | } | |
2444 | ||
2445 | sub load_hostfw_conf { | |
2446 | ||
2447 | my $hostfw_conf = {}; | |
2448 | if (my $fh = IO::File->new($hostfw_conf_filename, O_RDONLY)) { | |
2449 | $hostfw_conf = parse_host_fw_rules($hostfw_conf_filename, $fh); | |
2450 | } | |
2451 | return $hostfw_conf; | |
2452 | } | |
2453 | ||
2454 | sub save_hostfw_conf { | |
2455 | my ($hostfw_conf) = @_; | |
2456 | ||
2457 | my $raw = ''; | |
2458 | ||
2459 | my $options = $hostfw_conf->{options}; | |
2460 | $raw .= &$format_options($options) if scalar(keys %$options); | |
2461 | ||
2462 | my $rules = $hostfw_conf->{rules}; | |
2463 | if (scalar(@$rules)) { | |
2464 | $raw .= "[RULES]\n\n"; | |
2465 | $raw .= &$format_rules($rules, 1); | |
2466 | $raw .= "\n"; | |
2467 | } | |
2468 | ||
2469 | PVE::Tools::file_set_contents($hostfw_conf_filename, $raw); | |
2470 | } | |
2471 | ||
2472 | sub compile { | |
2473 | my $vmdata = read_local_vm_config(); | |
2474 | my $vmfw_configs = read_vm_firewall_configs($vmdata); | |
2475 | ||
2476 | my $routing_table = read_proc_net_route(); | |
2477 | ||
2478 | my $cluster_conf = load_clusterfw_conf(); | |
2479 | ||
2480 | my $ipset_ruleset = {}; | |
2481 | generate_ipset_chains($ipset_ruleset, $cluster_conf); | |
2482 | ||
2483 | my $ruleset = {}; | |
2484 | ||
2485 | ruleset_create_chain($ruleset, "PVEFW-INPUT"); | |
2486 | ruleset_create_chain($ruleset, "PVEFW-OUTPUT"); | |
2487 | ||
2488 | ruleset_create_chain($ruleset, "PVEFW-FORWARD"); | |
2489 | ||
2490 | my $hostfw_conf = load_hostfw_conf(); | |
2491 | my $hostfw_options = $hostfw_conf->{options} || {}; | |
2492 | ||
2493 | generate_std_chains($ruleset, $hostfw_options); | |
2494 | ||
2495 | my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0)); | |
2496 | ||
2497 | enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable; | |
2498 | ||
2499 | # generate firewall rules for QEMU VMs | |
2500 | foreach my $vmid (keys %{$vmdata->{qemu}}) { | |
2501 | my $conf = $vmdata->{qemu}->{$vmid}; | |
2502 | my $vmfw_conf = $vmfw_configs->{$vmid}; | |
2503 | next if !$vmfw_conf; | |
2504 | next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0); | |
2505 | ||
2506 | foreach my $netid (keys %$conf) { | |
2507 | next if $netid !~ m/^net(\d+)$/; | |
2508 | my $net = PVE::QemuServer::parse_net($conf->{$netid}); | |
2509 | next if !$net; | |
2510 | my $iface = "tap${vmid}i$1"; | |
2511 | ||
2512 | my $bridge = $net->{bridge}; | |
2513 | next if !$bridge; # fixme: ? | |
2514 | ||
2515 | $bridge .= "v$net->{tag}" if $net->{tag}; | |
2516 | ||
2517 | generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table); | |
2518 | ||
2519 | my $macaddr = $net->{macaddr}; | |
2520 | generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr, | |
2521 | $vmfw_conf, $vmid, $bridge, 'IN'); | |
2522 | generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr, | |
2523 | $vmfw_conf, $vmid, $bridge, 'OUT'); | |
2524 | } | |
2525 | } | |
2526 | ||
2527 | # generate firewall rules for OpenVZ containers | |
2528 | foreach my $vmid (keys %{$vmdata->{openvz}}) { | |
2529 | my $conf = $vmdata->{openvz}->{$vmid}; | |
2530 | ||
2531 | my $vmfw_conf = $vmfw_configs->{$vmid}; | |
2532 | next if !$vmfw_conf; | |
2533 | next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0); | |
2534 | ||
2535 | if ($conf->{ip_address} && $conf->{ip_address}->{value}) { | |
2536 | my $ip = $conf->{ip_address}->{value}; | |
2537 | generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN'); | |
2538 | generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT'); | |
2539 | } | |
2540 | ||
2541 | if ($conf->{netif} && $conf->{netif}->{value}) { | |
2542 | my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value}); | |
2543 | foreach my $netid (keys %$netif) { | |
2544 | my $d = $netif->{$netid}; | |
2545 | my $bridge = $d->{bridge}; | |
2546 | if (!$bridge) { | |
2547 | warn "no bridge device for CT $vmid iface '$netid'\n"; | |
2548 | next; # fixme? | |
2549 | } | |
2550 | ||
2551 | generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table); | |
2552 | ||
2553 | my $macaddr = $d->{mac}; | |
2554 | my $iface = $d->{host_ifname}; | |
2555 | generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr, | |
2556 | $vmfw_conf, $vmid, $bridge, 'IN'); | |
2557 | generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr, | |
2558 | $vmfw_conf, $vmid, $bridge, 'OUT'); | |
2559 | } | |
2560 | } | |
2561 | } | |
2562 | ||
2563 | if($hostfw_options->{optimize}){ | |
2564 | ||
2565 | my $accept = ruleset_chain_exist($ruleset, "PVEFW-IPS") ? "PVEFW-IPS" : "ACCEPT"; | |
2566 | ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept"); | |
2567 | ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate INVALID -j DROP"); | |
2568 | } | |
2569 | ||
2570 | # fixme: what log level should we use here? | |
2571 | my $loglevel = get_option_log_level($hostfw_options, "log_level_out"); | |
2572 | ||
2573 | # fixme: should we really block inter-bridge traffic? | |
2574 | ||
2575 | # always allow traffic from containers? | |
2576 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN"); | |
2577 | ||
2578 | # disable interbridge routing | |
2579 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop"); | |
2580 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop"); | |
2581 | ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-o vmbr+"); | |
2582 | ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-i vmbr+"); | |
2583 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP"); | |
2584 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP"); | |
2585 | ||
2586 | return wantarray ? ($ruleset, $hostfw_conf, $ipset_ruleset) : $ruleset; | |
2587 | } | |
2588 | ||
2589 | sub get_ruleset_status { | |
2590 | my ($ruleset, $active_chains, $digest_fn, $verbose) = @_; | |
2591 | ||
2592 | my $statushash = {}; | |
2593 | ||
2594 | foreach my $chain (sort keys %$ruleset) { | |
2595 | my $sig = &$digest_fn($ruleset->{$chain}); | |
2596 | ||
2597 | $statushash->{$chain}->{sig} = $sig; | |
2598 | ||
2599 | my $oldsig = $active_chains->{$chain}; | |
2600 | if (!defined($oldsig)) { | |
2601 | $statushash->{$chain}->{action} = 'create'; | |
2602 | } else { | |
2603 | if ($oldsig eq $sig) { | |
2604 | $statushash->{$chain}->{action} = 'exists'; | |
2605 | } else { | |
2606 | $statushash->{$chain}->{action} = 'update'; | |
2607 | } | |
2608 | } | |
2609 | print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose; | |
2610 | foreach my $cmd (@{$ruleset->{$chain}}) { | |
2611 | print "\t$cmd\n" if $verbose; | |
2612 | } | |
2613 | } | |
2614 | ||
2615 | foreach my $chain (sort keys %$active_chains) { | |
2616 | if (!defined($ruleset->{$chain})) { | |
2617 | my $sig = $active_chains->{$chain}; | |
2618 | $statushash->{$chain}->{action} = 'delete'; | |
2619 | $statushash->{$chain}->{sig} = $sig; | |
2620 | print "delete $chain ($sig)\n" if $verbose; | |
2621 | } | |
2622 | } | |
2623 | ||
2624 | return $statushash; | |
2625 | } | |
2626 | ||
2627 | sub print_sig_rule { | |
2628 | my ($chain, $sig) = @_; | |
2629 | ||
2630 | # We just use this to store a SHA1 checksum used to detect changes | |
2631 | return "-A $chain -m comment --comment \"PVESIG:$sig\"\n"; | |
2632 | } | |
2633 | ||
2634 | sub get_ruleset_cmdlist { | |
2635 | my ($ruleset, $verbose) = @_; | |
2636 | ||
2637 | my $cmdlist = "*filter\n"; # we pass this to iptables-restore; | |
2638 | ||
2639 | my ($active_chains, $hooks) = iptables_get_chains(); | |
2640 | my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose); | |
2641 | ||
2642 | # create missing chains first | |
2643 | foreach my $chain (sort keys %$ruleset) { | |
2644 | my $stat = $statushash->{$chain}; | |
2645 | die "internal error" if !$stat; | |
2646 | next if $stat->{action} ne 'create'; | |
2647 | ||
2648 | $cmdlist .= ":$chain - [0:0]\n"; | |
2649 | } | |
2650 | ||
2651 | foreach my $h (qw(INPUT OUTPUT FORWARD)) { | |
2652 | if (!$hooks->{$h}) { | |
2653 | $cmdlist .= "-A $h -j PVEFW-$h\n"; | |
2654 | } | |
2655 | } | |
2656 | ||
2657 | foreach my $chain (sort keys %$ruleset) { | |
2658 | my $stat = $statushash->{$chain}; | |
2659 | die "internal error" if !$stat; | |
2660 | ||
2661 | if ($stat->{action} eq 'update' || $stat->{action} eq 'create') { | |
2662 | $cmdlist .= "-F $chain\n"; | |
2663 | foreach my $cmd (@{$ruleset->{$chain}}) { | |
2664 | $cmdlist .= "$cmd\n"; | |
2665 | } | |
2666 | $cmdlist .= print_sig_rule($chain, $stat->{sig}); | |
2667 | } elsif ($stat->{action} eq 'delete') { | |
2668 | die "internal error"; # this should not happen | |
2669 | } elsif ($stat->{action} eq 'exists') { | |
2670 | # do nothing | |
2671 | } else { | |
2672 | die "internal error - unknown status '$stat->{action}'"; | |
2673 | } | |
2674 | } | |
2675 | ||
2676 | foreach my $chain (keys %$statushash) { | |
2677 | next if $statushash->{$chain}->{action} ne 'delete'; | |
2678 | $cmdlist .= "-F $chain\n"; | |
2679 | } | |
2680 | foreach my $chain (keys %$statushash) { | |
2681 | next if $statushash->{$chain}->{action} ne 'delete'; | |
2682 | next if $chain eq 'PVEFW-INPUT'; | |
2683 | next if $chain eq 'PVEFW-OUTPUT'; | |
2684 | next if $chain eq 'PVEFW-FORWARD'; | |
2685 | $cmdlist .= "-X $chain\n"; | |
2686 | } | |
2687 | ||
2688 | my $changes = $cmdlist ne "*filter\n" ? 1 : 0; | |
2689 | ||
2690 | $cmdlist .= "COMMIT\n"; | |
2691 | ||
2692 | return wantarray ? ($cmdlist, $changes) : $cmdlist; | |
2693 | } | |
2694 | ||
2695 | sub get_ipset_cmdlist { | |
2696 | my ($ruleset, $verbose) = @_; | |
2697 | ||
2698 | my $cmdlist = ""; | |
2699 | ||
2700 | my $delete_cmdlist = ""; | |
2701 | ||
2702 | my $active_chains = ipset_get_chains(); | |
2703 | my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose); | |
2704 | ||
2705 | # remove stale _swap chains | |
2706 | foreach my $chain (keys %$active_chains) { | |
2707 | if ($chain =~ m/^PVEFW-\S+_swap$/) { | |
2708 | $cmdlist .= "destroy $chain\n"; | |
2709 | } | |
2710 | } | |
2711 | ||
2712 | foreach my $chain (sort keys %$ruleset) { | |
2713 | my $stat = $statushash->{$chain}; | |
2714 | die "internal error" if !$stat; | |
2715 | ||
2716 | if ($stat->{action} eq 'create') { | |
2717 | foreach my $cmd (@{$ruleset->{$chain}}) { | |
2718 | $cmdlist .= "$cmd\n"; | |
2719 | } | |
2720 | } | |
2721 | ||
2722 | if ($stat->{action} eq 'update') { | |
2723 | my $chain_swap = $chain."_swap"; | |
2724 | ||
2725 | foreach my $cmd (@{$ruleset->{$chain}}) { | |
2726 | $cmd =~ s/$chain/$chain_swap/; | |
2727 | $cmdlist .= "$cmd\n"; | |
2728 | } | |
2729 | $cmdlist .= "swap $chain_swap $chain\n"; | |
2730 | $cmdlist .= "flush $chain_swap\n"; | |
2731 | $cmdlist .= "destroy $chain_swap\n"; | |
2732 | } | |
2733 | ||
2734 | } | |
2735 | ||
2736 | foreach my $chain (keys %$statushash) { | |
2737 | next if $statushash->{$chain}->{action} ne 'delete'; | |
2738 | ||
2739 | $delete_cmdlist .= "flush $chain\n"; | |
2740 | $delete_cmdlist .= "destroy $chain\n"; | |
2741 | } | |
2742 | ||
2743 | my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0; | |
2744 | ||
2745 | return ($cmdlist, $delete_cmdlist, $changes); | |
2746 | } | |
2747 | ||
2748 | sub apply_ruleset { | |
2749 | my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_; | |
2750 | ||
2751 | enable_bridge_firewall(); | |
2752 | ||
2753 | update_nf_conntrack_max($hostfw_conf); | |
2754 | ||
2755 | my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) = | |
2756 | get_ipset_cmdlist($ipset_ruleset, undef, $verbose); | |
2757 | ||
2758 | my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose); | |
2759 | ||
2760 | if ($verbose) { | |
2761 | if ($ipset_changes) { | |
2762 | print "ipset changes:\n"; | |
2763 | print $ipset_create_cmdlist if $ipset_create_cmdlist; | |
2764 | print $ipset_delete_cmdlist if $ipset_delete_cmdlist; | |
2765 | } | |
2766 | ||
2767 | if ($changes) { | |
2768 | print "iptables changes:\n"; | |
2769 | print $cmdlist; | |
2770 | } | |
2771 | } | |
2772 | ||
2773 | ipset_restore_cmdlist($ipset_create_cmdlist); | |
2774 | ||
2775 | iptables_restore_cmdlist($cmdlist); | |
2776 | ||
2777 | ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist; | |
2778 | ||
2779 | # test: re-read status and check if everything is up to date | |
2780 | my $active_chains = iptables_get_chains(); | |
2781 | my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0); | |
2782 | ||
2783 | my $errors; | |
2784 | foreach my $chain (sort keys %$ruleset) { | |
2785 | my $stat = $statushash->{$chain}; | |
2786 | if ($stat->{action} ne 'exists') { | |
2787 | warn "unable to update chain '$chain'\n"; | |
2788 | $errors = 1; | |
2789 | } | |
2790 | } | |
2791 | ||
2792 | die "unable to apply firewall changes\n" if $errors; | |
2793 | } | |
2794 | ||
2795 | sub update_nf_conntrack_max { | |
2796 | my ($hostfw_conf) = @_; | |
2797 | ||
2798 | my $max = 65536; # reasonable default | |
2799 | ||
2800 | my $options = $hostfw_conf->{options} || {}; | |
2801 | ||
2802 | if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) { | |
2803 | $max = $options->{nf_conntrack_max}; | |
2804 | $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192 | |
2805 | } | |
2806 | ||
2807 | my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max"; | |
2808 | my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize"; | |
2809 | ||
2810 | my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max); | |
2811 | ||
2812 | if ($current != $max) { | |
2813 | my $hashsize = int($max/4); | |
2814 | PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize); | |
2815 | PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max); | |
2816 | } | |
2817 | } | |
2818 | ||
2819 | sub remove_pvefw_chains { | |
2820 | ||
2821 | my ($chash, $hooks) = iptables_get_chains(); | |
2822 | my $cmdlist = "*filter\n"; | |
2823 | ||
2824 | foreach my $h (qw(INPUT OUTPUT FORWARD)) { | |
2825 | if ($hooks->{$h}) { | |
2826 | $cmdlist .= "-D $h -j PVEFW-$h\n"; | |
2827 | } | |
2828 | } | |
2829 | ||
2830 | foreach my $chain (keys %$chash) { | |
2831 | $cmdlist .= "-F $chain\n"; | |
2832 | } | |
2833 | ||
2834 | foreach my $chain (keys %$chash) { | |
2835 | $cmdlist .= "-X $chain\n"; | |
2836 | } | |
2837 | $cmdlist .= "COMMIT\n"; | |
2838 | ||
2839 | iptables_restore_cmdlist($cmdlist); | |
2840 | } | |
2841 | ||
2842 | sub update { | |
2843 | my ($start, $verbose) = @_; | |
2844 | ||
2845 | my $code = sub { | |
2846 | my $status = read_pvefw_status(); | |
2847 | ||
2848 | my ($ruleset, $hostfw_conf, $ipset_ruleset) = compile(); | |
2849 | ||
2850 | if ($start || $status eq 'active') { | |
2851 | ||
2852 | save_pvefw_status('active') if ($status ne 'active'); | |
2853 | ||
2854 | apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose); | |
2855 | } else { | |
2856 | print "Firewall not active (status = $status)\n" if $verbose; | |
2857 | } | |
2858 | }; | |
2859 | ||
2860 | run_locked($code); | |
2861 | } | |
2862 | ||
2863 | ||
2864 | 1; |