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[pve-firewall.git] / src / PVE / Firewall.pm
CommitLineData
b6360c3f
DM		 1package PVE::Firewall;
2
3use warnings;
4use strict;
cbb5d6f3 5use POSIX;
b6360c3f 6use Data::Dumper;
09d5f68e 7use Digest::SHA;
c8301d63 8use PVE::INotify;
7ca36671 9use PVE::Exception qw(raise raise_param_exc);
e74a87f5 10use PVE::JSONSchema qw(register_standard_option get_standard_option);
c8301d63 11use PVE::Cluster;
5f0a912c 12use PVE::ProcFSTools;
009ee3ac 13use PVE::Tools qw($IPV4RE);
6b9f68a2 14use File::Basename;
5e1267a5
DM		 15use File::Path;
16use IO::File;
ecbea048 17use Net::IP;
1a301a8d 18use PVE::Tools qw(run_command lock_file dir_glob_foreach);
30c1ae52 19use Encode;
ecbea048 20
63c91681 21my $hostfw_conf_filename = "/etc/pve/local/host.fw";
fca39c2c
DM		 22my $clusterfw_conf_filename = "/etc/pve/firewall/cluster.fw";
23
cbb5d6f3 24# dynamically include PVE::QemuServer and PVE::OpenVZ
d9fee004
DM		 25# to avoid dependency problems
26my $have_qemu_server;
27eval {
28 require PVE::QemuServer;
29 $have_qemu_server = 1;
30};
31
32my $have_pve_manager;
33eval {
34 require PVE::OpenVZ;
35 $have_pve_manager = 1;
36};
37
009ee3ac
DM		 38PVE::JSONSchema::register_format('IPv4orCIDR', \&pve_verify_ipv4_or_cidr);
39sub pve_verify_ipv4_or_cidr {
40 my ($cidr, $noerr) = @_;
41
30f1b100 42 if ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
e34d0e58 43 return $cidr if Net::IP->new($cidr);
30f1b100
DM		 44 return undef if $noerr;
45 die Net::IP::Error() . "\n";
009ee3ac
DM		 46 }
47 return undef if $noerr;
48 die "value does not look like a valid IP address or CIDR network\n";
49}
50
e74a87f5
DM		 51PVE::JSONSchema::register_standard_option('ipset-name', {
52 description => "IP set name.",
53 type => 'string',
54 pattern => '[A-Za-z][A-Za-z0-9\-\_]+',
387d0ffc 55 minLength => 2,
e34d0e58 56 maxLength => 20,
387d0ffc
DM		 57});
58
81d574a7
DM		 59PVE::JSONSchema::register_standard_option('pve-fw-alias', {
60 description => "Alias name.",
61 type => 'string',
62 pattern => '[A-Za-z][A-Za-z0-9\-\_]+',
63 minLength => 2,
e34d0e58 64 maxLength => 20,
81d574a7
DM		 65});
66
6302c41f
DM		 67PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
68 description => "Log level.",
e34d0e58 69 type => 'string',
6302c41f
DM		 70 enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
71 optional => 1,
72});
73
44be8ceb
DM		 74my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
75my $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
c14dacdf 76
387d0ffc
DM		 77PVE::JSONSchema::register_standard_option('pve-security-group-name', {
78 description => "Security Group name.",
79 type => 'string',
44be8ceb 80 pattern => $security_group_name_pattern,
387d0ffc 81 minLength => 2,
e34d0e58 82 maxLength => 20,
e74a87f5 83});
009ee3ac 84
cbb5d6f3
DM		 85my $feature_ipset_nomatch = 0;
86eval {
87 my (undef, undef, $release) = POSIX::uname();
88 if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
89 my ($major, $minor) = ($1, $2);
90 $feature_ipset_nomatch = 1 if ($major > 3) ||
91 ($major == 3 && $minor >= 7);
92 }
93
94};
95
5e1267a5 96use Data::Dumper;
b6360c3f 97
c8301d63
DM		 98my $nodename = PVE::INotify::nodename();
99
06320eb0
DM		 100my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
101
56f313f7 102my $default_log_level = 'nolog'; # avoid logs by default
2d404ffc
DM		 103
104my $log_level_hash = {
105 debug => 7,
106 info => 6,
107 notice => 5,
108 warning => 4,
109 err => 3,
110 crit => 2,
111 alert => 1,
112 emerg => 0,
113};
114
857f62c8 115# imported/converted from: /usr/share/shorewall/macro.*
961b4928 116my $pve_fw_macros = {
857f62c8 117 'Amanda' => [
ebd54ae9 118 "Amanda Backup",
857f62c8
DM		 119 { action => 'PARAM', proto => 'udp', dport => '10080' },
120 { action => 'PARAM', proto => 'tcp', dport => '10080' },
121 ],
122 'Auth' => [
ebd54ae9 123 "Auth (identd) traffic",
857f62c8
DM		 124 { action => 'PARAM', proto => 'tcp', dport => '113' },
125 ],
126 'BGP' => [
ebd54ae9 127 "Border Gateway Protocol traffic",
857f62c8
DM		 128 { action => 'PARAM', proto => 'tcp', dport => '179' },
129 ],
130 'BitTorrent' => [
ebd54ae9 131 "BitTorrent traffic for BitTorrent 3.1 and earlier",
961b4928 132 { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
857f62c8
DM		 133 { action => 'PARAM', proto => 'udp', dport => '6881' },
134 ],
135 'BitTorrent32' => [
ebd54ae9 136 "BitTorrent traffic for BitTorrent 3.2 and later",
857f62c8
DM		 137 { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
138 { action => 'PARAM', proto => 'udp', dport => '6881' },
139 ],
140 'CVS' => [
ebd54ae9 141 "Concurrent Versions System pserver traffic",
857f62c8
DM		 142 { action => 'PARAM', proto => 'tcp', dport => '2401' },
143 ],
144 'Citrix' => [
ebd54ae9 145 "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
857f62c8
DM		 146 { action => 'PARAM', proto => 'tcp', dport => '1494' },
147 { action => 'PARAM', proto => 'udp', dport => '1604' },
148 { action => 'PARAM', proto => 'tcp', dport => '2598' },
149 ],
150 'DAAP' => [
ebd54ae9 151 "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
857f62c8
DM		 152 { action => 'PARAM', proto => 'tcp', dport => '3689' },
153 { action => 'PARAM', proto => 'udp', dport => '3689' },
154 ],
155 'DCC' => [
ebd54ae9 156 "Distributed Checksum Clearinghouse spam filtering mechanism",
857f62c8
DM		 157 { action => 'PARAM', proto => 'tcp', dport => '6277' },
158 ],
159 'DHCPfwd' => [
d2c3266d 160 "Forwarded DHCP traffic",
857f62c8 161 { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
857f62c8
DM		 162 ],
163 'DNS' => [
ebd54ae9 164 "Domain Name System traffic (upd and tcp)",
857f62c8
DM		 165 { action => 'PARAM', proto => 'udp', dport => '53' },
166 { action => 'PARAM', proto => 'tcp', dport => '53' },
167 ],
168 'Distcc' => [
ebd54ae9 169 "Distributed Compiler service",
857f62c8
DM		 170 { action => 'PARAM', proto => 'tcp', dport => '3632' },
171 ],
857f62c8 172 'FTP' => [
ebd54ae9 173 "File Transfer Protocol",
857f62c8
DM		 174 { action => 'PARAM', proto => 'tcp', dport => '21' },
175 ],
176 'Finger' => [
ebd54ae9 177 "Finger protocol (RFC 742)",
857f62c8
DM		 178 { action => 'PARAM', proto => 'tcp', dport => '79' },
179 ],
180 'GNUnet' => [
ebd54ae9 181 "GNUnet secure peer-to-peer networking traffic",
857f62c8
DM		 182 { action => 'PARAM', proto => 'tcp', dport => '2086' },
183 { action => 'PARAM', proto => 'udp', dport => '2086' },
184 { action => 'PARAM', proto => 'tcp', dport => '1080' },
185 { action => 'PARAM', proto => 'udp', dport => '1080' },
186 ],
187 'GRE' => [
d2c3266d 188 "Generic Routing Encapsulation tunneling protocol",
857f62c8 189 { action => 'PARAM', proto => '47' },
857f62c8
DM		 190 ],
191 'Git' => [
ebd54ae9 192 "Git distributed revision control traffic",
857f62c8
DM		 193 { action => 'PARAM', proto => 'tcp', dport => '9418' },
194 ],
857f62c8 195 'HKP' => [
ebd54ae9 196 "OpenPGP HTTP keyserver protocol traffic",
857f62c8
DM		 197 { action => 'PARAM', proto => 'tcp', dport => '11371' },
198 ],
199 'HTTP' => [
ebd54ae9 200 "Hypertext Transfer Protocol (WWW)",
961b4928
DM		 201 { action => 'PARAM', proto => 'tcp', dport => '80' },
202 ],
857f62c8 203 'HTTPS' => [
ebd54ae9 204 "Hypertext Transfer Protocol (WWW) over SSL",
857f62c8
DM		 205 { action => 'PARAM', proto => 'tcp', dport => '443' },
206 ],
207 'ICPV2' => [
ebd54ae9 208 "Internet Cache Protocol V2 (Squid) traffic",
857f62c8
DM		 209 { action => 'PARAM', proto => 'udp', dport => '3130' },
210 ],
211 'ICQ' => [
ebd54ae9 212 "AOL Instant Messenger traffic",
857f62c8
DM		 213 { action => 'PARAM', proto => 'tcp', dport => '5190' },
214 ],
215 'IMAP' => [
ebd54ae9 216 "Internet Message Access Protocol",
857f62c8
DM		 217 { action => 'PARAM', proto => 'tcp', dport => '143' },
218 ],
219 'IMAPS' => [
ebd54ae9 220 "Internet Message Access Protocol over SSL",
857f62c8
DM		 221 { action => 'PARAM', proto => 'tcp', dport => '993' },
222 ],
223 'IPIP' => [
d2c3266d 224 "IPIP capsulation traffic",
857f62c8 225 { action => 'PARAM', proto => '94' },
857f62c8 226 ],
857f62c8 227 'IPsec' => [
d2c3266d 228 "IPsec traffic",
857f62c8
DM		 229 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
230 { action => 'PARAM', proto => '50' },
857f62c8
DM		 231 ],
232 'IPsecah' => [
d2c3266d 233 "IPsec authentication (AH) traffic",
857f62c8
DM		 234 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
235 { action => 'PARAM', proto => '51' },
857f62c8
DM		 236 ],
237 'IPsecnat' => [
d2c3266d 238 "IPsec traffic and Nat-Traversal",
857f62c8
DM		 239 { action => 'PARAM', proto => 'udp', dport => '500' },
240 { action => 'PARAM', proto => 'udp', dport => '4500' },
241 { action => 'PARAM', proto => '50' },
857f62c8
DM		 242 ],
243 'IRC' => [
ebd54ae9 244 "Internet Relay Chat traffic",
857f62c8
DM		 245 { action => 'PARAM', proto => 'tcp', dport => '6667' },
246 ],
857f62c8 247 'Jetdirect' => [
ebd54ae9 248 "HP Jetdirect printing",
857f62c8
DM		 249 { action => 'PARAM', proto => 'tcp', dport => '9100' },
250 ],
251 'L2TP' => [
ebd54ae9 252 "Layer 2 Tunneling Protocol traffic",
857f62c8 253 { action => 'PARAM', proto => 'udp', dport => '1701' },
857f62c8
DM		 254 ],
255 'LDAP' => [
ebd54ae9 256 "Lightweight Directory Access Protocol traffic",
857f62c8
DM		 257 { action => 'PARAM', proto => 'tcp', dport => '389' },
258 ],
259 'LDAPS' => [
ebd54ae9 260 "Secure Lightweight Directory Access Protocol traffic",
857f62c8
DM		 261 { action => 'PARAM', proto => 'tcp', dport => '636' },
262 ],
263 'MSNP' => [
ebd54ae9 264 "Microsoft Notification Protocol",
857f62c8
DM		 265 { action => 'PARAM', proto => 'tcp', dport => '1863' },
266 ],
267 'MSSQL' => [
ebd54ae9 268 "Microsoft SQL Server",
857f62c8
DM		 269 { action => 'PARAM', proto => 'tcp', dport => '1433' },
270 ],
271 'Mail' => [
ebd54ae9 272 "Mail traffic (SMTP, SMTPS, Submission)",
857f62c8
DM		 273 { action => 'PARAM', proto => 'tcp', dport => '25' },
274 { action => 'PARAM', proto => 'tcp', dport => '465' },
275 { action => 'PARAM', proto => 'tcp', dport => '587' },
276 ],
277 'Munin' => [
ebd54ae9 278 "Munin networked resource monitoring traffic",
857f62c8
DM		 279 { action => 'PARAM', proto => 'tcp', dport => '4949' },
280 ],
281 'MySQL' => [
ebd54ae9 282 "MySQL server",
857f62c8
DM		 283 { action => 'PARAM', proto => 'tcp', dport => '3306' },
284 ],
285 'NNTP' => [
ebd54ae9 286 "NNTP traffic (Usenet).",
857f62c8
DM		 287 { action => 'PARAM', proto => 'tcp', dport => '119' },
288 ],
289 'NNTPS' => [
ebd54ae9 290 "Encrypted NNTP traffic (Usenet)",
857f62c8
DM		 291 { action => 'PARAM', proto => 'tcp', dport => '563' },
292 ],
293 'NTP' => [
ebd54ae9 294 "Network Time Protocol (ntpd)",
857f62c8
DM		 295 { action => 'PARAM', proto => 'udp', dport => '123' },
296 ],
857f62c8 297 'OSPF' => [
ebd54ae9 298 "OSPF multicast traffic",
857f62c8
DM		 299 { action => 'PARAM', proto => '89' },
300 ],
301 'OpenVPN' => [
ebd54ae9 302 "OpenVPN traffic",
857f62c8
DM		 303 { action => 'PARAM', proto => 'udp', dport => '1194' },
304 ],
305 'PCA' => [
ebd54ae9 306 "Symantec PCAnywere (tm)",
857f62c8
DM		 307 { action => 'PARAM', proto => 'udp', dport => '5632' },
308 { action => 'PARAM', proto => 'tcp', dport => '5631' },
309 ],
310 'POP3' => [
ebd54ae9 311 "POP3 traffic",
857f62c8
DM		 312 { action => 'PARAM', proto => 'tcp', dport => '110' },
313 ],
314 'POP3S' => [
ebd54ae9 315 "Encrypted POP3 traffic",
857f62c8
DM		 316 { action => 'PARAM', proto => 'tcp', dport => '995' },
317 ],
318 'PPtP' => [
ebd54ae9 319 "Point-to-Point Tunneling Protocol",
857f62c8 320 { action => 'PARAM', proto => '47' },
857f62c8
DM		 321 { action => 'PARAM', proto => 'tcp', dport => '1723' },
322 ],
323 'Ping' => [
ebd54ae9 324 "ICMP echo request",
269d4f13 325 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
857f62c8
DM		 326 ],
327 'PostgreSQL' => [
ebd54ae9 328 "PostgreSQL server",
857f62c8
DM		 329 { action => 'PARAM', proto => 'tcp', dport => '5432' },
330 ],
331 'Printer' => [
ebd54ae9 332 "Line Printer protocol printing",
857f62c8
DM		 333 { action => 'PARAM', proto => 'tcp', dport => '515' },
334 ],
335 'RDP' => [
ebd54ae9 336 "Microsoft Remote Desktop Protocol traffic",
857f62c8
DM		 337 { action => 'PARAM', proto => 'tcp', dport => '3389' },
338 ],
d2c3266d 339 'RIP' => [
ebd54ae9 340 "Routing Information Protocol (bidirectional)",
857f62c8 341 { action => 'PARAM', proto => 'udp', dport => '520' },
857f62c8
DM		 342 ],
343 'RNDC' => [
ebd54ae9 344 "BIND remote management protocol",
857f62c8
DM		 345 { action => 'PARAM', proto => 'tcp', dport => '953' },
346 ],
347 'Razor' => [
ebd54ae9 348 "Razor Antispam System",
857f62c8
DM		 349 { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
350 ],
351 'Rdate' => [
ebd54ae9 352 "Remote time retrieval (rdate)",
857f62c8
DM		 353 { action => 'PARAM', proto => 'tcp', dport => '37' },
354 ],
355 'Rsync' => [
ebd54ae9 356 "Rsync server",
857f62c8
DM		 357 { action => 'PARAM', proto => 'tcp', dport => '873' },
358 ],
359 'SANE' => [
ebd54ae9 360 "SANE network scanning",
857f62c8
DM		 361 { action => 'PARAM', proto => 'tcp', dport => '6566' },
362 ],
363 'SMB' => [
ebd54ae9 364 "Microsoft SMB traffic",
857f62c8
DM		 365 { action => 'PARAM', proto => 'udp', dport => '135,445' },
366 { action => 'PARAM', proto => 'udp', dport => '137:139' },
367 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
368 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
369 ],
857f62c8 370 'SMBswat' => [
ebd54ae9 371 "Samba Web Administration Tool",
857f62c8
DM		 372 { action => 'PARAM', proto => 'tcp', dport => '901' },
373 ],
374 'SMTP' => [
ebd54ae9 375 "Simple Mail Transfer Protocol",
857f62c8
DM		 376 { action => 'PARAM', proto => 'tcp', dport => '25' },
377 ],
378 'SMTPS' => [
ebd54ae9 379 "Encrypted Simple Mail Transfer Protocol",
857f62c8
DM		 380 { action => 'PARAM', proto => 'tcp', dport => '465' },
381 ],
382 'SNMP' => [
ebd54ae9 383 "Simple Network Management Protocol",
857f62c8
DM		 384 { action => 'PARAM', proto => 'udp', dport => '161:162' },
385 { action => 'PARAM', proto => 'tcp', dport => '161' },
386 ],
387 'SPAMD' => [
ebd54ae9 388 "Spam Assassin SPAMD traffic",
857f62c8
DM		 389 { action => 'PARAM', proto => 'tcp', dport => '783' },
390 ],
391 'SSH' => [
ebd54ae9 392 "Secure shell traffic",
857f62c8
DM		 393 { action => 'PARAM', proto => 'tcp', dport => '22' },
394 ],
395 'SVN' => [
ebd54ae9 396 "Subversion server (svnserve)",
857f62c8
DM		 397 { action => 'PARAM', proto => 'tcp', dport => '3690' },
398 ],
399 'SixXS' => [
ebd54ae9 400 "SixXS IPv6 Deployment and Tunnel Broker",
857f62c8
DM		 401 { action => 'PARAM', proto => 'tcp', dport => '3874' },
402 { action => 'PARAM', proto => 'udp', dport => '3740' },
403 { action => 'PARAM', proto => '41' },
404 { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
405 ],
406 'Squid' => [
ebd54ae9 407 "Squid web proxy traffic",
857f62c8
DM		 408 { action => 'PARAM', proto => 'tcp', dport => '3128' },
409 ],
410 'Submission' => [
ebd54ae9 411 "Mail message submission traffic",
857f62c8
DM		 412 { action => 'PARAM', proto => 'tcp', dport => '587' },
413 ],
414 'Syslog' => [
ebd54ae9 415 "Syslog protocol (RFC 5424) traffic",
857f62c8
DM		 416 { action => 'PARAM', proto => 'udp', dport => '514' },
417 { action => 'PARAM', proto => 'tcp', dport => '514' },
418 ],
419 'TFTP' => [
ebd54ae9 420 "Trivial File Transfer Protocol traffic",
857f62c8
DM		 421 { action => 'PARAM', proto => 'udp', dport => '69' },
422 ],
423 'Telnet' => [
ebd54ae9 424 "Telnet traffic",
857f62c8
DM		 425 { action => 'PARAM', proto => 'tcp', dport => '23' },
426 ],
427 'Telnets' => [
ebd54ae9 428 "Telnet over SSL",
857f62c8
DM		 429 { action => 'PARAM', proto => 'tcp', dport => '992' },
430 ],
431 'Time' => [
ebd54ae9 432 "RFC 868 Time protocol",
857f62c8
DM		 433 { action => 'PARAM', proto => 'tcp', dport => '37' },
434 ],
435 'Trcrt' => [
ebd54ae9 436 "Traceroute (for up to 30 hops) traffic",
857f62c8 437 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
269d4f13 438 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
857f62c8
DM		 439 ],
440 'VNC' => [
93be4333
DM		 441 "VNC traffic for VNC display's 0 - 99",
442 { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
857f62c8
DM		 443 ],
444 'VNCL' => [
ebd54ae9 445 "VNC traffic from Vncservers to Vncviewers in listen mode",
857f62c8
DM		 446 { action => 'PARAM', proto => 'tcp', dport => '5500' },
447 ],
448 'Web' => [
ebd54ae9 449 "WWW traffic (HTTP and HTTPS)",
857f62c8 450 { action => 'PARAM', proto => 'tcp', dport => '80' },
961b4928
DM		 451 { action => 'PARAM', proto => 'tcp', dport => '443' },
452 ],
857f62c8 453 'Webcache' => [
ebd54ae9 454 "Web Cache/Proxy traffic (port 8080)",
857f62c8
DM		 455 { action => 'PARAM', proto => 'tcp', dport => '8080' },
456 ],
457 'Webmin' => [
ebd54ae9 458 "Webmin traffic",
857f62c8
DM		 459 { action => 'PARAM', proto => 'tcp', dport => '10000' },
460 ],
461 'Whois' => [
ebd54ae9 462 "Whois (nicname, RFC 3912) traffic",
857f62c8
DM		 463 { action => 'PARAM', proto => 'tcp', dport => '43' },
464 ],
961b4928
DM		 465};
466
467my $pve_fw_parsed_macros;
ebd54ae9 468my $pve_fw_macro_descr;
961b4928 469my $pve_fw_preferred_macro_names = {};
3a616aa0 470
d8f2505e
DM		 471my $pve_std_chains = {
472 'PVEFW-SET-ACCEPT-MARK' => [
473 "-j MARK --set-mark 1",
474 ],
79929d9c
DM		 475 'PVEFW-DropBroadcast' => [
476 # same as shorewall 'Broadcast'
477 # simply DROP BROADCAST/MULTICAST/ANYCAST
478 # we can use this to reduce logging
479 { action => 'DROP', dsttype => 'BROADCAST' },
480 { action => 'DROP', dsttype => 'MULTICAST' },
481 { action => 'DROP', dsttype => 'ANYCAST' },
cbb5d6f3 482 { action => 'DROP', dest => '224.0.0.0/4' },
79929d9c
DM		 483 ],
484 'PVEFW-reject' => [
485 # same as shorewall 'reject'
486 { action => 'DROP', dsttype => 'BROADCAST' },
cbb5d6f3 487 { action => 'DROP', source => '224.0.0.0/4' },
79929d9c
DM		 488 { action => 'DROP', proto => 'icmp' },
489 "-p tcp -j REJECT --reject-with tcp-reset",
490 "-p udp -j REJECT --reject-with icmp-port-unreachable",
491 "-p icmp -j REJECT --reject-with icmp-host-unreachable",
492 "-j REJECT --reject-with icmp-host-prohibited",
493 ],
494 'PVEFW-Drop' => [
cbb5d6f3 495 # same as shorewall 'Drop', which is equal to DROP,
79929d9c
DM		 496 # but REJECT/DROP some packages to reduce logging,
497 # and ACCEPT critical ICMP types
498 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
499 # we are not interested in BROADCAST/MULTICAST/ANYCAST
500 { action => 'PVEFW-DropBroadcast' },
501 # ACCEPT critical ICMP types
502 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
503 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
504 # Drop packets with INVALID state
505 "-m conntrack --ctstate INVALID -j DROP",
506 # Drop Microsoft SMB noise
507 { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
508 { action => 'DROP', proto => 'udp', dport => '137:139'},
509 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
510 { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
511 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
512 # Drop new/NotSyn traffic so that it doesn't get logged
513 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
514 # Drop DNS replies
515 { action => 'DROP', proto => 'udp', sport => 53 },
516 ],
517 'PVEFW-Reject' => [
cbb5d6f3 518 # same as shorewall 'Reject', which is equal to Reject,
79929d9c
DM		 519 # but REJECT/DROP some packages to reduce logging,
520 # and ACCEPT critical ICMP types
521 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
522 # we are not interested in BROADCAST/MULTICAST/ANYCAST
523 { action => 'PVEFW-DropBroadcast' },
524 # ACCEPT critical ICMP types
525 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
526 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
527 # Drop packets with INVALID state
528 "-m conntrack --ctstate INVALID -j DROP",
529 # Drop Microsoft SMB noise
530 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
531 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
532 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
533 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
534 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
535 # Drop new/NotSyn traffic so that it doesn't get logged
536 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
537 # Drop DNS replies
538 { action => 'DROP', proto => 'udp', sport => 53 },
539 ],
d86659ef
DM		 540 'PVEFW-tcpflags' => [
541 # same as shorewall tcpflags action.
542 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
543 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
544 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
545 "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
546 "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
547 "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
548 ],
bee633ab
DM		 549 'PVEFW-smurfs' => [
550 # same as shorewall smurfs action
551 # Filter packets for smurfs (packets with a broadcast address as the source).
552 "-s 0.0.0.0/32 -j RETURN",
553 "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
554 "-s 224.0.0.0/4 -g PVEFW-smurflog",
555 ],
d8f2505e
DM		 556};
557
4b586518
DM		 558# iptables -p icmp -h
559my $icmp_type_names = {
560 any => 1,
561 'echo-reply' => 1,
562 'destination-unreachable' => 1,
563 'network-unreachable' => 1,
564 'host-unreachable' => 1,
565 'protocol-unreachable' => 1,
566 'port-unreachable' => 1,
567 'fragmentation-needed' => 1,
568 'source-route-failed' => 1,
569 'network-unknown' => 1,
570 'host-unknown' => 1,
571 'network-prohibited' => 1,
572 'host-prohibited' => 1,
573 'TOS-network-unreachable' => 1,
574 'TOS-host-unreachable' => 1,
575 'communication-prohibited' => 1,
576 'host-precedence-violation' => 1,
577 'precedence-cutoff' => 1,
578 'source-quench' => 1,
579 'redirect' => 1,
580 'network-redirect' => 1,
581 'host-redirect' => 1,
582 'TOS-network-redirect' => 1,
583 'TOS-host-redirect' => 1,
584 'echo-request' => 1,
585 'router-advertisement' => 1,
586 'router-solicitation' => 1,
587 'time-exceeded' => 1,
588 'ttl-zero-during-transit' => 1,
589 'ttl-zero-during-reassembly' => 1,
590 'parameter-problem' => 1,
591 'ip-header-bad' => 1,
592 'required-option-missing' => 1,
593 'timestamp-request' => 1,
594 'timestamp-reply' => 1,
595 'address-mask-request' => 1,
596 'address-mask-reply' => 1,
597};
598
54cd19a8 599sub init_firewall_macros {
6158271d 600
961b4928 601 $pve_fw_parsed_macros = {};
9aab3127 602
961b4928 603 foreach my $k (keys %$pve_fw_macros) {
e5076eee
DM		 604 my $lc_name = lc($k);
605 my $macro = $pve_fw_macros->{$k};
ebd54ae9
DM		 606 if (!ref($macro->[0])) {
607 $pve_fw_macro_descr->{$k} = shift @$macro;
608 }
e5076eee
DM		 609 $pve_fw_preferred_macro_names->{$lc_name} = $k;
610 $pve_fw_parsed_macros->{$k} = $macro;
961b4928 611 }
9aab3127
DM		 612}
613
54cd19a8
DM		 614init_firewall_macros();
615
ebd54ae9
DM		 616sub get_macros {
617 return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
618}
619
fcba0beb
DM		 620my $etc_services;
621
622sub get_etc_services {
623
624 return $etc_services if $etc_services;
625
626 my $filename = "/etc/services";
627
628 my $fh = IO::File->new($filename, O_RDONLY);
629 if (!$fh) {
630 warn "unable to read '$filename' - $!\n";
631 return {};
632 }
633
634 my $services = {};
635
636 while (my $line = <$fh>) {
637 chomp ($line);
638 next if $line =~m/^#/;
639 next if ($line =~m/^\s*$/);
640
641 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
642 $services->{byid}->{$2}->{name} = $1;
35b66e9d 643 $services->{byid}->{$2}->{port} = $2;
fcba0beb
DM		 644 $services->{byid}->{$2}->{$3} = 1;
645 $services->{byname}->{$1} = $services->{byid}->{$2};
646 }
647 }
648
649 close($fh);
650
6158271d
DM		 651 $etc_services = $services;
652
3a616aa0 653
fcba0beb
DM		 654 return $etc_services;
655}
656
657my $etc_protocols;
658
659sub get_etc_protocols {
660 return $etc_protocols if $etc_protocols;
661
662 my $filename = "/etc/protocols";
663
664 my $fh = IO::File->new($filename, O_RDONLY);
665 if (!$fh) {
666 warn "unable to read '$filename' - $!\n";
667 return {};
668 }
669
670 my $protocols = {};
671
672 while (my $line = <$fh>) {
673 chomp ($line);
674 next if $line =~m/^#/;
675 next if ($line =~m/^\s*$/);
676
677 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
678 $protocols->{byid}->{$2}->{name} = $1;
679 $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
680 }
681 }
682
683 close($fh);
684
685 $etc_protocols = $protocols;
686
687 return $etc_protocols;
688}
689
525778d7 690my $ipv4_mask_hash_localnet = {
93be4333
DM		 691 '255.255.0.0' => 16,
692 '255.255.128.0' => 17,
693 '255.255.192.0' => 18,
694 '255.255.224.0' => 19,
695 '255.255.240.0' => 20,
696 '255.255.248.0' => 21,
697 '255.255.252.0' => 22,
698 '255.255.254.0' => 23,
699 '255.255.255.0' => 24,
700 '255.255.255.128' => 25,
701 '255.255.255.192' => 26,
702 '255.255.255.224' => 27,
703 '255.255.255.240' => 28,
704 '255.255.255.248' => 29,
705 '255.255.255.252' => 30,
706};
707
525778d7 708my $__local_network;
93be4333 709
525778d7 710sub local_network {
ac633d30 711 my ($new_value) = @_;
93be4333 712
525778d7 713 $__local_network = $new_value if defined($new_value);
ac633d30 714
525778d7 715 return $__local_network if defined($__local_network);
93be4333
DM		 716
717 eval {
718 my $nodename = PVE::INotify::nodename();
719
720 my $ip = PVE::Cluster::remote_node_ip($nodename);
721
722 my $testip = Net::IP->new($ip);
723
724 my $routes = PVE::ProcFSTools::read_proc_net_route();
725 foreach my $entry (@$routes) {
525778d7 726 my $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
93be4333
DM		 727 next if !defined($mask);
728 return if $mask eq '0.0.0.0';
729 my $cidr = "$entry->{dest}/$mask";
730 my $testnet = Net::IP->new($cidr);
731 if ($testnet->overlaps($testip)) {
525778d7 732 $__local_network = $cidr;
93be4333
DM		 733 return;
734 }
735 }
736 };
737 warn $@ if $@;
738
525778d7 739 return $__local_network;
93be4333
DM		 740}
741
ecbea048
DM		 742sub parse_address_list {
743 my ($str) = @_;
744
28311400 745 return if $str =~ m/^(\+)(\S+)$/; # ipset ref
44be8ceb 746 return if $str =~ m/^${ip_alias_pattern}$/;
d72beb8e 747
3162af6b
DM		 748 my $count = 0;
749 my $iprange = 0;
750 foreach my $elem (split(/,/, $str)) {
751 $count++;
752 if (!Net::IP->new($elem)) {
ecbea048
DM		 753 my $err = Net::IP::Error();
754 die "invalid IP address: $err\n";
755 }
3162af6b 756 $iprange = 1 if $elem =~ m/-/;
ecbea048 757 }
e34d0e58 758
3162af6b 759 die "you can use a range in a list\n" if $iprange && $count > 1;
ecbea048 760}
dddd9413 761
fcba0beb
DM		 762sub parse_port_name_number_or_range {
763 my ($str) = @_;
764
765 my $services = PVE::Firewall::get_etc_services();
7ca36671 766 my $count = 0;
041b7e8e
DM		 767 my $icmp_port = 0;
768
fcba0beb 769 foreach my $item (split(/,/, $str)) {
7ca36671
DM		 770 $count++;
771 if ($item =~ m/^(\d+):(\d+)$/) {
772 my ($port1, $port2) = ($1, $2);
773 die "invalid port '$port1'\n" if $port1 > 65535;
774 die "invalid port '$port2'\n" if $port2 > 65535;
775 } elsif ($item =~ m/^(\d+)$/) {
776 my $port = $1;
777 die "invalid port '$port'\n" if $port > 65535;
778 } else {
041b7e8e
DM		 779 if ($icmp_type_names->{$item}) {
780 $icmp_port = 1;
781 } else {
e34d0e58 782 die "invalid port '$item'\n" if !$services->{byname}->{$item};
041b7e8e 783 }
fcba0beb
DM		 784 }
785 }
786
041b7e8e
DM		 787 die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
788
7ca36671 789 return $count;
fcba0beb
DM		 790}
791
54cd19a8
DM		 792PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
793sub pve_fw_verify_port_spec {
794 my ($portstr) = @_;
795
7ca36671 796 parse_port_name_number_or_range($portstr);
54cd19a8
DM		 797
798 return $portstr;
799}
800
801PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
802sub pve_fw_verify_v4addr_spec {
803 my ($list) = @_;
804
805 parse_address_list($list);
806
807 return $list;
808}
809
810PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
811sub pve_fw_verify_protocol_spec {
812 my ($proto) = @_;
813
814 my $protocols = get_etc_protocols();
815
816 die "unknown protocol '$proto'\n" if $proto &&
817 !(defined($protocols->{byname}->{$proto}) ||
818 defined($protocols->{byid}->{$proto}));
819
820 return $proto;
821}
822
823
d1c53b3e 824# helper function for API
d1c53b3e 825
5d38d64f
DM		 826sub copy_opject_with_digest {
827 my ($object) = @_;
828
829 my $sha = Digest::SHA->new('sha1');
830
831 my $res = {};
832 foreach my $k (sort keys %$object) {
833 my $v = $object->{$k};
0365eb68 834 next if !defined($v);
5d38d64f
DM		 835 $res->{$k} = $v;
836 $sha->add($k, ':', $v, "\n");
837 }
838
55e686c7 839 my $digest = $sha->hexdigest;
5d38d64f
DM		 840
841 $res->{digest} = $digest;
842
843 return wantarray ? ($res, $digest) : $res;
844}
845
846sub copy_list_with_digest {
847 my ($list) = @_;
848
849 my $sha = Digest::SHA->new('sha1');
850
851 my $res = [];
852 foreach my $entry (@$list) {
853 my $data = {};
854 foreach my $k (sort keys %$entry) {
855 my $v = $entry->{$k};
0365eb68 856 next if !defined($v);
5d38d64f
DM		 857 $data->{$k} = $v;
858 $sha->add($k, ':', $v, "\n");
859 }
860 push @$res, $data;
861 }
862
55e686c7 863 my $digest = $sha->hexdigest;
5d38d64f
DM		 864
865 foreach my $entry (@$res) {
866 $entry->{digest} = $digest;
867 }
868
869 return wantarray ? ($res, $digest) : $res;
870}
871
9c7e0858
DM		 872my $rule_properties = {
873 pos => {
874 description => "Update rule at position <pos>.",
875 type => 'integer',
876 minimum => 0,
877 optional => 1,
878 },
c71e785f 879 digest => get_standard_option('pve-config-digest'),
9c7e0858
DM		 880 type => {
881 type => 'string',
882 optional => 1,
883 enum => ['in', 'out', 'group'],
884 },
885 action => {
c14dacdf 886 description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
9c7e0858
DM		 887 type => 'string',
888 optional => 1,
44be8ceb 889 pattern => $security_group_name_pattern,
c14dacdf
DM		 890 maxLength => 20,
891 minLength => 2,
9c7e0858 892 },
e5076eee
DM		 893 macro => {
894 type => 'string',
895 optional => 1,
54cd19a8 896 maxLength => 128,
e5076eee 897 },
54cd19a8 898 iface => get_standard_option('pve-iface', { optional => 1 }),
9c7e0858 899 source => {
54cd19a8 900 type => 'string', format => 'pve-fw-v4addr-spec',
9c7e0858
DM		 901 optional => 1,
902 },
903 dest => {
54cd19a8 904 type => 'string', format => 'pve-fw-v4addr-spec',
9c7e0858
DM		 905 optional => 1,
906 },
907 proto => {
54cd19a8 908 type => 'string', format => 'pve-fw-protocol-spec',
9c7e0858
DM		 909 optional => 1,
910 },
911 enable => {
912 type => 'boolean',
913 optional => 1,
914 },
915 sport => {
54cd19a8 916 type => 'string', format => 'pve-fw-port-spec',
9c7e0858
DM		 917 optional => 1,
918 },
919 dport => {
54cd19a8 920 type => 'string', format => 'pve-fw-port-spec',
9c7e0858
DM		 921 optional => 1,
922 },
923 comment => {
924 type => 'string',
925 optional => 1,
926 },
927};
928
929sub add_rule_properties {
930 my ($properties) = @_;
931
932 foreach my $k (keys %$rule_properties) {
3655b01f
DM		 933 my $h = $rule_properties->{$k};
934 # copy data, so that we can modify later without side effects
935 foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
9c7e0858 936 }
cbb5d6f3 937
9c7e0858
DM		 938 return $properties;
939}
940
5b7974df
DM		 941sub delete_rule_properties {
942 my ($rule, $delete_str) = @_;
e34d0e58 943
5b7974df
DM		 944 foreach my $opt (PVE::Tools::split_list($delete_str)) {
945 raise_param_exc({ 'delete' => "no such property ('$opt')"})
946 if !defined($rule_properties->{$opt});
947 raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
948 if $opt eq 'type' || $opt eq 'action';
949 delete $rule->{$opt};
950 }
951
952 return $rule;
953}
954
9a2745a0
DM		 955my $apply_macro = sub {
956 my ($macro_name, $param, $verify) = @_;
957
958 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
959 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
960
961 my $rules = [];
962
963 foreach my $templ (@$macro_rules) {
964 my $rule = {};
965 my $param_used = {};
966 foreach my $k (keys %$templ) {
967 my $v = $templ->{$k};
968 if ($v eq 'PARAM') {
969 $v = $param->{$k};
970 $param_used->{$k} = 1;
971 } elsif ($v eq 'DEST') {
972 $v = $param->{dest};
973 $param_used->{dest} = 1;
974 } elsif ($v eq 'SOURCE') {
975 $v = $param->{source};
976 $param_used->{source} = 1;
977 }
978
979 if (!defined($v)) {
980 my $msg = "missing parameter '$k' in macro '$macro_name'";
e34d0e58 981 raise_param_exc({ macro => $msg }) if $verify;
9a2745a0
DM		 982 die "$msg\n";
983 }
984 $rule->{$k} = $v;
985 }
986 foreach my $k (keys %$param) {
987 next if $k eq 'macro';
988 next if !defined($param->{$k});
989 next if $param_used->{$k};
990 if (defined($rule->{$k})) {
991 if ($rule->{$k} ne $param->{$k}) {
992 my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
e34d0e58 993 raise_param_exc({ $k => $msg }) if $verify;
9a2745a0
DM		 994 die "$msg\n";
995 }
996 } else {
997 $rule->{$k} = $param->{$k};
998 }
999 }
1000 push @$rules, $rule;
1001 }
1002
1003 return $rules;
1004};
1005
7ca36671
DM		 1006sub verify_rule {
1007 my ($rule, $allow_groups) = @_;
1008
1009 my $type = $rule->{type};
1010
1011 raise_param_exc({ type => "missing property"}) if !$type;
1012 raise_param_exc({ action => "missing property"}) if !$rule->{action};
e34d0e58 1013
7ca36671
DM		 1014 if ($type eq 'in' || $type eq 'out') {
1015 raise_param_exc({ action => "unknown action '$rule->{action}'"})
1016 if $rule->{action} !~ m/^(ACCEPT|DROP|REJECT)$/;
1017 } elsif ($type eq 'group') {
e34d0e58 1018 raise_param_exc({ type => "security groups not allowed"})
7ca36671 1019 if !$allow_groups;
e34d0e58 1020 raise_param_exc({ action => "invalid characters in security group name"})
44be8ceb 1021 if $rule->{action} !~ m/^${security_group_name_pattern}$/;
7ca36671
DM		 1022 } else {
1023 raise_param_exc({ type => "unknown rule type '$type'"});
1024 }
e34d0e58 1025
dba740a9
DM		 1026 if ($rule->{iface}) {
1027 eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1028 raise_param_exc({ iface => $@ }) if $@;
1029 }
7ca36671
DM		 1030
1031 if ($rule->{macro}) {
1032 my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})};
1033 raise_param_exc({ macro => "unknown macro '$rule->{macro}'"}) if !$preferred_name;
1034 $rule->{macro} = $preferred_name;
914f9a50 1035 }
7ca36671
DM		 1036
1037 if ($rule->{dport}) {
1038 eval { parse_port_name_number_or_range($rule->{dport}); };
1039 raise_param_exc({ dport => $@ }) if $@;
914f9a50
DM		 1040 raise_param_exc({ proto => "missing property - 'dport' requires this property"})
1041 if !$rule->{proto};
1042 }
7ca36671
DM		 1043
1044 if ($rule->{sport}) {
1045 eval { parse_port_name_number_or_range($rule->{sport}); };
1046 raise_param_exc({ sport => $@ }) if $@;
914f9a50
DM		 1047 raise_param_exc({ proto => "missing property - 'sport' requires this property"})
1048 if !$rule->{proto};
7ca36671
DM		 1049 }
1050
1051 if ($rule->{source}) {
1052 eval { parse_address_list($rule->{source}); };
1053 raise_param_exc({ source => $@ }) if $@;
1054 }
1055
1056 if ($rule->{dest}) {
1057 eval { parse_address_list($rule->{dest}); };
1058 raise_param_exc({ dest => $@ }) if $@;
1059 }
1060
9a2745a0
DM		 1061 if ($rule->{macro}) {
1062 &$apply_macro($rule->{macro}, $rule, 1);
1063 }
1064
7ca36671
DM		 1065 return $rule;
1066}
1067
9c7e0858
DM		 1068sub copy_rule_data {
1069 my ($rule, $param) = @_;
1070
1071 foreach my $k (keys %$rule_properties) {
1072 if (defined(my $v = $param->{$k})) {
1073 if ($v eq '' || $v eq '-') {
1074 delete $rule->{$k};
1075 } else {
1076 $rule->{$k} = $v;
1077 }
9c7e0858
DM		 1078 }
1079 }
7ca36671 1080
9c7e0858
DM		 1081 return $rule;
1082}
1083
1084# core functions
780bcc0f
DM		 1085my $bridge_firewall_enabled = 0;
1086
1087sub enable_bridge_firewall {
1088
1089 return if $bridge_firewall_enabled; # only once
1090
5f0a912c
DM		 1091 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1092 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
780bcc0f 1093
6a8a75db
DM		 1094 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1095 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1096
780bcc0f
DM		 1097 $bridge_firewall_enabled = 1;
1098}
1099
8cebfa6f 1100my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
dddd9413 1101
b16e818e
DM		 1102sub iptables_restore_cmdlist {
1103 my ($cmdlist) = @_;
3a616aa0 1104
3fa83edf 1105 run_command("/sbin/iptables-restore -n", input => $cmdlist);
3a616aa0
AD		 1106}
1107
34cdedfa
AD		 1108sub ipset_restore_cmdlist {
1109 my ($cmdlist) = @_;
1110
dd7a13fd 1111 run_command("/usr/sbin/ipset restore", input => $cmdlist);
34cdedfa
AD		 1112}
1113
de2a57cd
DM		 1114sub iptables_get_chains {
1115
1116 my $res = {};
1117
1118 # check what chains we want to track
1119 my $is_pvefw_chain = sub {
1120 my $name = shift;
1121
dec84fcd
DM		 1122 return 1 if $name =~ m/^PVEFW-\S+$/;
1123
de2a57cd 1124 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
954f24b1
DM		 1125
1126 return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1127
9e15114a
DM		 1128 return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1129
a01c32c7 1130 return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
f50656c2 1131 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
de2a57cd
DM		 1132
1133 return undef;
1134 };
1135
1136 my $table = '';
1137
c4a2e5ae
DM		 1138 my $hooks = {};
1139
de2a57cd
DM		 1140 my $parser = sub {
1141 my $line = shift;
1142
1143 return if $line =~ m/^#/;
1144 return if $line =~ m/^\s*$/;
1145
1146 if ($line =~ m/^\*(\S+)$/) {
1147 $table = $1;
1148 return;
1149 }
1150
1151 return if $table ne 'filter';
1152
1153 if ($line =~ m/^:(\S+)\s/) {
1154 my $chain = $1;
1155 return if !&$is_pvefw_chain($chain);
3fa83edf 1156 $res->{$chain} = "unknown";
09d5f68e 1157 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
3fa83edf 1158 my ($chain, $sig) = ($1, $2);
de2a57cd 1159 return if !&$is_pvefw_chain($chain);
3fa83edf 1160 $res->{$chain} = $sig;
c4a2e5ae
DM		 1161 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1162 $hooks->{$1} = 1;
de2a57cd
DM		 1163 } else {
1164 # simply ignore the rest
1165 return;
1166 }
1167 };
1168
1169 run_command("/sbin/iptables-save", outfunc => $parser);
1170
c4a2e5ae 1171 return wantarray ? ($res, $hooks) : $res;
de2a57cd
DM		 1172}
1173
9bf7d929
DM		 1174sub iptables_chain_digest {
1175 my ($rules) = @_;
1176 my $digest = Digest::SHA->new('sha1');
1177 foreach my $rule (@$rules) { # order is important
1178 $digest->add($rule);
1179 }
1180 return $digest->b64digest;
1181}
1182
3f95d14a
DM		 1183sub ipset_chain_digest {
1184 my ($rules) = @_;
4bd0a9c4 1185
3f95d14a
DM		 1186 my $digest = Digest::SHA->new('sha1');
1187 foreach my $rule (sort @$rules) { # note: sorted
1188 $digest->add($rule);
1189 }
1190 return $digest->b64digest;
1191}
1192
34cdedfa
AD		 1193sub ipset_get_chains {
1194
1195 my $res = {};
1196 my $chains = {};
1197
1198 my $parser = sub {
1199 my $line = shift;
1200
1201 return if $line =~ m/^#/;
1202 return if $line =~ m/^\s*$/;
4b96e877 1203 if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
81a0bf43
DM		 1204 my $chain = $1;
1205 $line =~ s/\s+$//; # delete trailing white space
1206 push @{$chains->{$chain}}, $line;
34cdedfa
AD		 1207 } else {
1208 # simply ignore the rest
1209 return;
1210 }
1211 };
1212
3f95d14a 1213 run_command("/usr/sbin/ipset save", outfunc => $parser);
34cdedfa 1214
3f95d14a
DM		 1215 # compute digest for each chain
1216 foreach my $chain (keys %$chains) {
1217 $res->{$chain} = ipset_chain_digest($chains->{$chain});
34cdedfa
AD		 1218 }
1219
1220 return $res;
1221}
1222
eba0fb64 1223sub ruleset_generate_cmdstr {
ba791b1f 1224 my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
3a616aa0 1225
00bb4391 1226 return if defined($rule->{enable}) && !$rule->{enable};
11bac5c2 1227
e5076eee
DM		 1228 die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1229
1230 my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1231 my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
e5076eee 1232
41524a58 1233 my @cmd = ();
3a616aa0 1234
eba0fb64
DM		 1235 push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1236 push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1237
ba791b1f
AD		 1238 my $source = $rule->{source};
1239 my $dest = $rule->{dest};
1240
cbb5d6f3 1241 if ($source) {
44be8ceb
DM		 1242 if ($source =~ m/^\+/) {
1243 if ($source =~ m/^\+(${security_group_name_pattern})$/) {
1244 die "no such ipset '$1'\n" if !$cluster_conf->{ipset}->{$1};
1245 push @cmd, "-m set --match-set PVEFW-$1 src";
1246 } else {
1247 die "invalid security group name '$source'\n";
1248 }
1249 } elsif ($source =~ m/^${ip_alias_pattern}$/){
81d574a7
DM		 1250 my $alias = lc($source);
1251 my $e = $cluster_conf->{aliases}->{$alias};
1252 die "no such alias $source\n" if !$e;
1253 push @cmd, "-s $e->{cidr}";
ac8242cc 1254 } elsif ($source =~ m/\-/){
ba791b1f
AD		 1255 push @cmd, "-m iprange --src-range $source";
1256
cbb5d6f3 1257 } else {
ba791b1f
AD		 1258 push @cmd, "-s $source";
1259 }
1260 }
1261
cbb5d6f3 1262 if ($dest) {
44be8ceb
DM		 1263 if ($dest =~ m/^\+/) {
1264 if ($dest =~ m/^\+(${security_group_name_pattern})$/) {
1265 die "no such ipset '$1'\n" if !$cluster_conf->{ipset}->{$1};
1266 push @cmd, "-m set --match-set PVEFW-$1 dst";
1267 } else {
1268 die "invalid security group name '$dest'\n";
1269 }
1270 } elsif ($dest =~ m/^${ip_alias_pattern}$/){
51b40846 1271 my $alias = lc($dest);
81d574a7
DM		 1272 my $e = $cluster_conf->{aliases}->{$alias};
1273 die "no such alias $dest" if !$e;
1274 push @cmd, "-d $e->{cidr}";
cbb5d6f3 1275 } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
ba791b1f
AD		 1276 push @cmd, "-m iprange --dst-range $dest";
1277
cbb5d6f3 1278 } else {
d6d2a385 1279 push @cmd, "-d $dest";
ba791b1f
AD		 1280 }
1281 }
4b586518 1282
181390b0 1283 if ($rule->{proto}) {
41524a58 1284 push @cmd, "-p $rule->{proto}";
e3a1d391 1285
181390b0 1286 my $multiport = 0;
e5076eee
DM		 1287 $multiport++ if $nbdport > 1;
1288 $multiport++ if $nbsport > 1;
e3a1d391 1289
41524a58 1290 push @cmd, "--match multiport" if $multiport;
4b586518 1291
cbb5d6f3 1292 die "multiport: option '--sports' cannot be used together with '--dports'\n"
181390b0
DM		 1293 if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1294
1295 if ($rule->{dport}) {
1296 if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1297 # Note: we use dport to store --icmp-type
1298 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
41524a58 1299 push @cmd, "-m icmp --icmp-type $rule->{dport}";
181390b0 1300 } else {
e5076eee 1301 if ($nbdport > 1) {
181390b0 1302 if ($multiport == 2) {
41524a58 1303 push @cmd, "--ports $rule->{dport}";
181390b0 1304 } else {
41524a58 1305 push @cmd, "--dports $rule->{dport}";
181390b0 1306 }
e3a1d391 1307 } else {
41524a58 1308 push @cmd, "--dport $rule->{dport}";
e3a1d391 1309 }
4b586518
DM		 1310 }
1311 }
4b586518 1312
181390b0 1313 if ($rule->{sport}) {
e5076eee 1314 if ($nbsport > 1) {
41524a58 1315 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
181390b0 1316 } else {
41524a58 1317 push @cmd, "--sport $rule->{sport}";
181390b0 1318 }
4b586518 1319 }
181390b0 1320 } elsif ($rule->{dport} || $rule->{sport}) {
93d96f83
DM		 1321 die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1322 die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
4b586518
DM		 1323 }
1324
41524a58 1325 push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
4e6112f9
DM		 1326
1327 if (my $action = $rule->{action}) {
cbb5d6f3 1328 $action = $actions->{$action} if defined($actions->{$action});
4e6112f9 1329 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
41524a58 1330 push @cmd, $goto ? "-g $action" : "-j $action";
181390b0 1331 }
3a616aa0 1332
eba0fb64
DM		 1333 return scalar(@cmd) ? join(' ', @cmd) : undef;
1334}
1335
1336sub ruleset_generate_rule {
ba791b1f 1337 my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
eba0fb64 1338
e5076eee
DM		 1339 my $rules;
1340
1341 if ($rule->{macro}) {
1342 $rules = &$apply_macro($rule->{macro}, $rule);
1343 } else {
1344 $rules = [ $rule ];
1345 }
1346
d4091b82
DM		 1347 # update all or nothing
1348
1349 my @cmds = ();
cbb5d6f3 1350 foreach my $tmp (@$rules) {
ba791b1f 1351 if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
d4091b82 1352 push @cmds, $cmdstr;
e5076eee 1353 }
41524a58 1354 }
d4091b82
DM		 1355
1356 foreach my $cmdstr (@cmds) {
1357 ruleset_addrule($ruleset, $chain, $cmdstr);
1358 }
3fa83edf 1359}
0f168d7b 1360
eba0fb64
DM		 1361sub ruleset_generate_rule_insert {
1362 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1363
e5076eee
DM		 1364 die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1365
eba0fb64
DM		 1366 if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1367 ruleset_insertrule($ruleset, $chain, $cmdstr);
1368 }
1369}
3fa83edf
DM		 1370
1371sub ruleset_create_chain {
1372 my ($ruleset, $chain) = @_;
3a616aa0 1373
d050c724 1374 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
782c4cde 1375 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
d050c724 1376
3fa83edf
DM		 1377 die "chain '$chain' already exists\n" if $ruleset->{$chain};
1378
1379 $ruleset->{$chain} = [];
3a616aa0
AD		 1380}
1381
3fa83edf
DM		 1382sub ruleset_chain_exist {
1383 my ($ruleset, $chain) = @_;
3a616aa0 1384
3fa83edf
DM		 1385 return $ruleset->{$chain} ? 1 : undef;
1386}
3a616aa0 1387
3fa83edf
DM		 1388sub ruleset_addrule {
1389 my ($ruleset, $chain, $rule) = @_;
3a616aa0 1390
3fa83edf 1391 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 1392
3fa83edf
DM		 1393 push @{$ruleset->{$chain}}, "-A $chain $rule";
1394}
3a616aa0 1395
3fa83edf
DM		 1396sub ruleset_insertrule {
1397 my ($ruleset, $chain, $rule) = @_;
3a616aa0 1398
3fa83edf 1399 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 1400
3fa83edf
DM		 1401 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1402}
3a616aa0 1403
782c4cde
DM		 1404sub get_log_rule_base {
1405 my ($chain, $vmid, $msg, $loglevel) = @_;
cbb5d6f3 1406
782c4cde
DM		 1407 die "internal error - no log level" if !defined($loglevel);
1408
1409 $vmid = 0 if !defined($vmid);
1410
cbb5d6f3 1411 # Note: we use special format for prefix to pass further
782c4cde
DM		 1412 # info to log daemon (VMID, LOGVELEL and CHAIN)
1413
1414 return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1415}
1416
1417sub ruleset_addlog {
1418 my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1419
1420 return if !defined($loglevel);
1421
1422 my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1423
1424 $logrule = "$rule $logrule" if defined($rule);
1425
88733a74 1426 ruleset_addrule($ruleset, $chain, $logrule);
782c4cde
DM		 1427}
1428
ead850e8 1429sub ruleset_add_chain_policy {
782c4cde 1430 my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
ead850e8
DM		 1431
1432 if ($policy eq 'ACCEPT') {
1433
1434 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1435 { ACCEPT => $accept_action});
1436
1437 } elsif ($policy eq 'DROP') {
1438
1439 ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1440
782c4cde 1441 ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
ead850e8
DM		 1442
1443 ruleset_addrule($ruleset, $chain, "-j DROP");
1444 } elsif ($policy eq 'REJECT') {
1445 ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1446
782c4cde 1447 ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
ead850e8
DM		 1448
1449 ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1450 } else {
1451 # should not happen
1452 die "internal error: unknown policy '$policy'";
1453 }
1454}
1455
e2943485
DM		 1456sub ruleset_chain_add_conn_filters {
1457 my ($ruleset, $chain, $accept) = @_;
1458
1459 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1460 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1461}
1462
1463sub ruleset_chain_add_input_filters {
2428e394
AD		 1464 my ($ruleset, $chain, $options, $cluster_conf, $loglevel) = @_;
1465
1466 if ($cluster_conf->{ipset}->{blacklist}){
1467 ruleset_addlog($ruleset, $chain, 0, "DROP: ", $loglevel, "-m set --match-set PVEFW-blacklist src");
1468 ruleset_addrule($ruleset, $chain, "-m set --match-set PVEFW-blacklist src -j DROP");
1469 }
e2943485
DM		 1470
1471 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1472 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1473 }
1474
1475 if ($options->{tcpflags}) {
1476 ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1477 }
1478}
1479
9e15114a 1480sub ruleset_create_vm_chain {
58638f2c 1481 my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
3a616aa0 1482
9e15114a 1483 ruleset_create_chain($ruleset, $chain);
b47ecc88 1484 my $accept = generate_nfqueue($options);
3a616aa0 1485
ce15d90b 1486 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
76a2d1e7 1487 if ($direction eq 'OUT') {
cbb5d6f3 1488 ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
0f168d7b 1489 proto => 'udp', sport => 68, dport => 67 });
76a2d1e7 1490 } else {
cbb5d6f3 1491 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
0f168d7b 1492 proto => 'udp', sport => 67, dport => 68 });
76a2d1e7 1493 }
ce15d90b
DM		 1494 }
1495
b21aca2c
DM		 1496 if ($direction eq 'OUT') {
1497 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
9e15114a 1498 ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
b21aca2c 1499 }
9e15114a 1500 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
c29f55c9 1501 }
9e15114a
DM		 1502}
1503
4bc6b5ac
DM		 1504sub ruleset_add_group_rule {
1505 my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action) = @_;
1506
1507 my $group = $rule->{action};
1508 my $group_chain = "GROUP-$group-$direction";
1509 if(!ruleset_chain_exist($ruleset, $group_chain)){
1510 generate_group_rules($ruleset, $cluster_conf, $group);
1511 }
f8b12fff
DM		 1512
1513 if ($direction eq 'OUT' && $rule->{iface_out}) {
1514 ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1515 } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1516 ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
4bc6b5ac
DM		 1517 } else {
1518 ruleset_addrule($ruleset, $chain, "-j $group_chain");
1519 }
1520
1521 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1522}
1523
9e15114a 1524sub ruleset_generate_vm_rules {
fca39c2c 1525 my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
9e15114a
DM		 1526
1527 my $lc_direction = lc($direction);
c29f55c9 1528
6b8ca015
DM		 1529 my $in_accept = generate_nfqueue($options);
1530
92e976b3
DM		 1531 foreach my $rule (@$rules) {
1532 next if $rule->{iface} && $rule->{iface} ne $netid;
ea9e5116 1533 next if !$rule->{enable};
92e976b3 1534 if ($rule->{type} eq 'group') {
4bc6b5ac
DM		 1535 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1536 $direction eq 'OUT' ? 'RETURN' : $in_accept);
92e976b3
DM		 1537 } else {
1538 next if $rule->{type} ne $lc_direction;
921dfb33
DM		 1539 eval {
1540 if ($direction eq 'OUT') {
1541 ruleset_generate_rule($ruleset, $chain, $rule,
e34d0e58 1542 { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
921dfb33
DM		 1543 undef, $cluster_conf);
1544 } else {
e34d0e58
DM		 1545 ruleset_generate_rule($ruleset, $chain, $rule,
1546 { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
921dfb33
DM		 1547 undef, $cluster_conf);
1548 }
1549 };
1550 warn $@ if $@;
4e6112f9 1551 }
3a616aa0 1552 }
9e15114a
DM		 1553}
1554
b47ecc88
AD		 1555sub generate_nfqueue {
1556 my ($options) = @_;
1557
73089769
DM		 1558 if ($options->{ips}) {
1559 my $action = "NFQUEUE";
1560 if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1561 if (defined($3) && defined($1)) {
b47ecc88 1562 $action .= " --queue-balance $1:$3";
73089769 1563 } elsif (defined($1)) {
b47ecc88
AD		 1564 $action .= " --queue-num $1";
1565 }
1566 }
8dc92812 1567 $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
73089769
DM		 1568 return $action;
1569 } else {
1570 return "ACCEPT";
b47ecc88 1571 }
b47ecc88
AD		 1572}
1573
da6fc60b 1574sub ruleset_generate_vm_ipsrules {
a01c32c7 1575 my ($ruleset, $options, $direction, $iface) = @_;
da6fc60b
AD		 1576
1577 if ($options->{ips} && $direction eq 'IN') {
1578 my $nfqueue = generate_nfqueue($options);
1579
a01c32c7 1580 if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
da6fc60b
AD		 1581 ruleset_create_chain($ruleset, "PVEFW-IPS");
1582 }
1583
a01c32c7 1584 ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
da6fc60b
AD		 1585 }
1586}
1587
9e15114a 1588sub generate_venet_rules_direction {
58638f2c 1589 my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
9e15114a 1590
9e15114a
DM		 1591 my $lc_direction = lc($direction);
1592
1593 my $rules = $vmfw_conf->{rules};
1594
1595 my $options = $vmfw_conf->{options};
1596 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1597
1598 my $chain = "venet0-$vmid-$direction";
1599
58638f2c 1600 ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
9e15114a 1601
fca39c2c 1602 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
9e15114a
DM		 1603
1604 # implement policy
1605 my $policy;
1606
1607 if ($direction eq 'OUT') {
1608 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1609 } else {
1610 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1611 }
1612
b47ecc88
AD		 1613 my $accept = generate_nfqueue($options);
1614 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
782c4cde 1615 ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
9e15114a 1616
eba0fb64 1617 if ($direction eq 'OUT') {
41389aed 1618 ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", {
eba0fb64
DM		 1619 action => $chain,
1620 source => $ip,
1621 iface_in => 'venet0'});
1622 } else {
41389aed 1623 ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", {
eba0fb64
DM		 1624 action => $chain,
1625 dest => $ip,
1626 iface_out => 'venet0'});
1627 }
9e15114a
DM		 1628}
1629
1630sub generate_tap_rules_direction {
58638f2c 1631 my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction) = @_;
9e15114a
DM		 1632
1633 my $lc_direction = lc($direction);
1634
1635 my $rules = $vmfw_conf->{rules};
1636
1637 my $options = $vmfw_conf->{options};
1638 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1639
1640 my $tapchain = "$iface-$direction";
1641
58638f2c 1642 ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
9e15114a 1643
fca39c2c 1644 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
3a616aa0 1645
a01c32c7 1646 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
da6fc60b 1647
ccae0b50
DM		 1648 # implement policy
1649 my $policy;
1650
1651 if ($direction eq 'OUT') {
72f63fde 1652 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
ccae0b50 1653 } else {
72f63fde 1654 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
ccae0b50
DM		 1655 }
1656
b47ecc88
AD		 1657 my $accept = generate_nfqueue($options);
1658 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
782c4cde 1659 ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
3a616aa0 1660
3fa83edf 1661 # plug the tap chain to bridge chain
3cc81077 1662 if ($direction eq 'IN') {
a01c32c7
DM		 1663 ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
1664 "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
3cc81077 1665 } else {
a01c32c7
DM		 1666 ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
1667 "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
3cc81077 1668 }
3a616aa0
AD		 1669}
1670
d18c1e2b 1671sub enable_host_firewall {
fca39c2c 1672 my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
0bd5f137 1673
92e976b3 1674 my $options = $hostfw_conf->{options};
63324b09 1675 my $cluster_options = $cluster_conf->{options};
92e976b3 1676 my $rules = $hostfw_conf->{rules};
35f0c37e 1677 my $cluster_rules = $cluster_conf->{rules};
178a63be 1678
3fa83edf 1679 # host inbound firewall
dec84fcd
DM		 1680 my $chain = "PVEFW-HOST-IN";
1681 ruleset_create_chain($ruleset, $chain);
0bd5f137 1682
178a63be
DM		 1683 my $loglevel = get_option_log_level($options, "log_level_in");
1684
e2943485 1685 ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
4ac863a6 1686
e2943485 1687 ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2428e394 1688 ruleset_chain_add_input_filters($ruleset, $chain, $options, $cluster_conf, $loglevel);
fb424a00 1689
23e888f8
DM		 1690 # we use RETURN because we need to check also tap rules
1691 my $accept_action = 'RETURN';
1692
cc8dc02f
DM		 1693 ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1694
35f0c37e
DM		 1695 # add host rules first, so that cluster wide rules can be overwritten
1696 foreach my $rule (@$rules, @$cluster_rules) {
f8b12fff 1697 $rule->{iface_in} = $rule->{iface} if $rule->{iface};
1a9978ed
DM		 1698 eval {
1699 if ($rule->{type} eq 'group') {
1700 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action);
1701 } elsif ($rule->{type} eq 'in') {
1702 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1703 undef, $cluster_conf);
1704 }
1705 };
1706 warn $@ if $@;
f8b12fff 1707 delete $rule->{iface_in};
0bd5f137 1708 }
eb399cef
DM		 1709
1710 # allow standard traffic for management ipset (includes cluster network)
1711 my $mngmntsrc = "-m set --match-set PVEFW-management src";
1712 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action"); # PVE API
1713 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action"); # PVE VNC Console
1714 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action"); # SPICE Proxy
1715 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action"); # SSH
3bc79f87 1716
525778d7 1717 my $localnet = local_network();
3bc79f87 1718
eb399cef 1719 # corosync
525778d7 1720 if ($localnet) {
c5191f57 1721 my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
525778d7
DM		 1722 ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
1723 ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
3bc79f87 1724 }
0bd5f137 1725
23e888f8 1726 # implement input policy
63324b09 1727 my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
782c4cde 1728 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
0bd5f137 1729
3fa83edf 1730 # host outbound firewall
aadd745e 1731 $chain = "PVEFW-HOST-OUT";
dec84fcd
DM		 1732 ruleset_create_chain($ruleset, $chain);
1733
178a63be
DM		 1734 $loglevel = get_option_log_level($options, "log_level_out");
1735
dec84fcd 1736 ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
e2943485
DM		 1737
1738 ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1739
23e888f8
DM		 1740 # we use RETURN because we may want to check other thigs later
1741 $accept_action = 'RETURN';
1742
cc8dc02f
DM		 1743 ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1744
35f0c37e
DM		 1745 # add host rules first, so that cluster wide rules can be overwritten
1746 foreach my $rule (@$rules, @$cluster_rules) {
f8b12fff 1747 $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1a9978ed
DM		 1748 eval {
1749 if ($rule->{type} eq 'group') {
1750 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action);
1751 } elsif ($rule->{type} eq 'out') {
1752 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1753 undef, $cluster_conf);
1754 }
1755 };
1756 warn $@ if $@;
f8b12fff 1757 delete $rule->{iface_out};
0bd5f137
AD		 1758 }
1759
3bc79f87 1760 # allow standard traffic on cluster network
525778d7
DM		 1761 if ($localnet) {
1762 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action"); # PVE API
1763 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action"); # SSH
1764 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action"); # PVE VNC Console
1765 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action"); # SPICE Proxy
3bc79f87 1766
c5191f57 1767 my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
525778d7 1768 ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
f573ae2c 1769 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
3bc79f87
DM		 1770 }
1771
23e888f8 1772 # implement output policy
63324b09 1773 $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
782c4cde 1774 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
6158271d 1775
dec84fcd
DM		 1776 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1777 ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
9d31b418
AD		 1778}
1779
1780sub generate_group_rules {
fca39c2c 1781 my ($ruleset, $cluster_conf, $group) = @_;
9d31b418 1782
c6f5cc88 1783 my $rules = $cluster_conf->{groups}->{$group};
6158271d 1784
b4deedab
DM		 1785 if (!$rules) {
1786 warn "no such security group '$group'\n";
1787 $rules = []; # create empty chain
1788 }
1789
3fa83edf 1790 my $chain = "GROUP-${group}-IN";
9d31b418 1791
3fa83edf 1792 ruleset_create_chain($ruleset, $chain);
b47ecc88 1793 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
9d31b418 1794
92e976b3
DM		 1795 foreach my $rule (@$rules) {
1796 next if $rule->{type} ne 'in';
ba791b1f 1797 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
9d31b418
AD		 1798 }
1799
3fa83edf 1800 $chain = "GROUP-${group}-OUT";
9d31b418 1801
3fa83edf 1802 ruleset_create_chain($ruleset, $chain);
4e6112f9 1803 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
9d31b418 1804
92e976b3
DM		 1805 foreach my $rule (@$rules) {
1806 next if $rule->{type} ne 'out';
1807 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1808 # check also other tap rules later
cbb5d6f3 1809 ruleset_generate_rule($ruleset, $chain, $rule,
ba791b1f 1810 { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
9d31b418 1811 }
9d31b418
AD		 1812}
1813
51bae274
DM		 1814my $MAX_NETS = 32;
1815my $valid_netdev_names = {};
1816for (my $i = 0; $i < $MAX_NETS; $i++) {
1817 $valid_netdev_names->{"net$i"} = 1;
1818}
5e1267a5 1819
51bae274 1820sub parse_fw_rule {
dba740a9 1821 my ($line, $allow_iface, $allow_groups) = @_;
5e1267a5 1822
dba740a9
DM		 1823 my ($type, $action, $macro, $iface, $source, $dest, $proto, $dport, $sport);
1824
1825 chomp $line;
51bae274 1826
11bac5c2 1827 # we can add single line comments to the end of the rule
30c1ae52 1828 my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
11bac5c2
DM		 1829
1830 # we can disable a rule when prefixed with '|'
ea9e5116
DM		 1831 my $enable = 1;
1832
1833 $enable = 0 if $line =~ s/^\|//;
51bae274 1834
dba740a9
DM		 1835 $line =~ s/^(\S+)\s+(\S+)\s*// ||
1836 die "unable to parse rule: $line\n";
1837
1838 $type = lc($1);
1839 $action = $2;
92e976b3
DM		 1840
1841 if ($type eq 'in' || $type eq 'out') {
1842 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1843 # OK
1844 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
e5076eee
DM		 1845 $action = $2;
1846 my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1847 die "unknown macro '$1'\n" if !$preferred_name;
1848 $macro = $preferred_name;
92e976b3
DM		 1849 } else {
1850 die "unknown action '$action'\n";
1851 }
1852 } elsif ($type eq 'group') {
92e976b3 1853 die "groups disabled\n" if !$allow_groups;
44be8ceb 1854 die "invalid characters in group name\n" if $action !~ m/^${security_group_name_pattern}$/;
51bae274 1855 } else {
92e976b3 1856 die "unknown rule type '$type'\n";
51bae274
DM		 1857 }
1858
dba740a9
DM		 1859 while (length($line)) {
1860 if ($line =~ s/^-i (\S+)\s*//) {
1861 die "parameter -i not allowed\n" if !$allow_iface;
1862 $iface = $1;
1863 PVE::JSONSchema::pve_verify_iface($iface);
1864 next;
1865 }
51bae274 1866
dba740a9 1867 last if $type eq 'group';
51bae274 1868
dba740a9
DM		 1869 if ($line =~ s/^-p (\S+)\s*//) {
1870 $proto = $1;
1871 pve_fw_verify_protocol_spec($proto);
1872 next;
1873 }
1874 if ($line =~ s/^-dport (\S+)\s*//) {
1875 $dport = $1;
1876 parse_port_name_number_or_range($dport);
1877 next;
1878 }
1879 if ($line =~ s/^-sport (\S+)\s*//) {
1880 $sport = $1;
1881 parse_port_name_number_or_range($sport);
1882 next;
1883 }
1884 if ($line =~ s/^-source (\S+)\s*//) {
1885 $source = $1;
1886 parse_address_list($source);
1887 next;
1888 }
1889 if ($line =~ s/^-dest (\S+)\s*//) {
1890 $dest = $1;
1891 parse_address_list($dest);
1892 next;
1893 }
51bae274 1894
dba740a9
DM		 1895 last;
1896 }
ba791b1f 1897
dba740a9 1898 die "unable to parse rule parameters: $line\n" if length($line);
51bae274 1899
e5076eee 1900 return {
92e976b3 1901 type => $type,
ea9e5116 1902 enable => $enable,
11bac5c2 1903 comment => $comment,
51bae274 1904 action => $action,
e5076eee 1905 macro => $macro,
51bae274
DM		 1906 iface => $iface,
1907 source => $source,
1908 dest => $dest,
51bae274
DM		 1909 proto => $proto,
1910 dport => $dport,
1911 sport => $sport,
51bae274
DM		 1912 };
1913}
1914
2d404ffc 1915sub parse_vmfw_option {
85c6eaed
DM		 1916 my ($line) = @_;
1917
1918 my ($opt, $value);
1919
178a63be
DM		 1920 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1921
6bafd113 1922 if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
9c6b6efd
DM		 1923 $opt = lc($1);
1924 $value = int($2);
178a63be
DM		 1925 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1926 $opt = lc($1);
1927 $value = $2 ? lc($3) : '';
72f63fde 1928 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
85c6eaed
DM		 1929 $opt = lc($1);
1930 $value = uc($3);
b47ecc88
AD		 1931 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1932 $opt = lc($1);
1933 $value = $2;
9c6b6efd 1934 } else {
85c6eaed
DM		 1935 chomp $line;
1936 die "can't parse option '$line'\n"
1937 }
1938
1939 return ($opt, $value);
1940}
1941
2d404ffc
DM		 1942sub parse_hostfw_option {
1943 my ($line) = @_;
1944
1945 my ($opt, $value);
1946
1947 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1948
c50a5a68 1949 if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
2d404ffc
DM		 1950 $opt = lc($1);
1951 $value = int($2);
178a63be 1952 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2d404ffc
DM		 1953 $opt = lc($1);
1954 $value = $2 ? lc($3) : '';
28c082a1 1955 } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
490cdead
DM		 1956 $opt = lc($1);
1957 $value = int($2);
2d404ffc
DM		 1958 } else {
1959 chomp $line;
1960 die "can't parse option '$line'\n"
1961 }
1962
1963 return ($opt, $value);
1964}
1965
c6f5cc88
DM		 1966sub parse_clusterfw_option {
1967 my ($line) = @_;
1968
1969 my ($opt, $value);
1970
1971 if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1972 $opt = lc($1);
1973 $value = int($2);
63324b09
DM		 1974 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1975 $opt = lc($1);
1976 $value = uc($3);
c6f5cc88
DM		 1977 } else {
1978 chomp $line;
1979 die "can't parse option '$line'\n"
1980 }
1981
1982 return ($opt, $value);
1983}
1984
e76a9f53 1985sub parse_alias {
92e1209b
AD		 1986 my ($line) = @_;
1987
81d574a7
DM		 1988 # we can add single line comments to the end of the line
1989 my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
1990
92e1209b 1991 if ($line =~ m/^(\S+)\s(\S+)$/) {
81d574a7
DM		 1992 my ($name, $cidr) = ($1, $2);
1993 $cidr =~ s|/32$||;
1994 pve_verify_ipv4_or_cidr($cidr);
1995 my $data = {
1996 name => $name,
1997 cidr => $cidr,
1998 };
1999 $data->{comment} = $comment if $comment;
2000 return $data;
92e1209b
AD		 2001 }
2002
81d574a7 2003 return undef;
92e1209b
AD		 2004}
2005
51bae274
DM		 2006sub parse_vm_fw_rules {
2007 my ($filename, $fh) = @_;
2008
e76a9f53
DM		 2009 my $res = {
2010 rules => [],
2011 options => {},
2012 aliases => {},
2013 };
51bae274
DM		 2014
2015 my $section;
2016
5e1267a5
DM		 2017 while (defined(my $line = <$fh>)) {
2018 next if $line =~ m/^#/;
2019 next if $line =~ m/^\s*$/;
2020
961b4928
DM		 2021 my $linenr = $fh->input_line_number();
2022 my $prefix = "$filename (line $linenr)";
2023
85c6eaed 2024 if ($line =~ m/^\[(\S+)\]\s*$/i) {
5e1267a5 2025 $section = lc($1);
85c6eaed 2026 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
5e1267a5
DM		 2027 next;
2028 }
51bae274 2029 if (!$section) {
961b4928 2030 warn "$prefix: skip line - no section";
5e1267a5
DM		 2031 next;
2032 }
2033
85c6eaed
DM		 2034 next if !$res->{$section}; # skip undefined section
2035
2036 if ($section eq 'options') {
6158271d 2037 eval {
2d404ffc 2038 my ($opt, $value) = parse_vmfw_option($line);
85c6eaed
DM		 2039 $res->{options}->{$opt} = $value;
2040 };
2041 warn "$prefix: $@" if $@;
2042 next;
2043 }
2044
e76a9f53
DM		 2045 if ($section eq 'aliases') {
2046 eval {
2047 my $data = parse_alias($line);
2048 $res->{aliases}->{lc($data->{name})} = $data;
2049 };
2050 warn "$prefix: $@" if $@;
2051 next;
2052 }
2053
e5076eee
DM		 2054 my $rule;
2055 eval { $rule = parse_fw_rule($line, 1, 1); };
51bae274 2056 if (my $err = $@) {
961b4928 2057 warn "$prefix: $err";
5e1267a5
DM		 2058 next;
2059 }
2060
e5076eee 2061 push @{$res->{$section}}, $rule;
51bae274
DM		 2062 }
2063
2064 return $res;
2065}
2066
2067sub parse_host_fw_rules {
2068 my ($filename, $fh) = @_;
2069
92e976b3 2070 my $res = { rules => [], options => {}};
51bae274
DM		 2071
2072 my $section;
2073
2074 while (defined(my $line = <$fh>)) {
2075 next if $line =~ m/^#/;
2076 next if $line =~ m/^\s*$/;
2077
961b4928
DM		 2078 my $linenr = $fh->input_line_number();
2079 my $prefix = "$filename (line $linenr)";
2080
2d404ffc 2081 if ($line =~ m/^\[(\S+)\]\s*$/i) {
51bae274 2082 $section = lc($1);
2d404ffc 2083 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
5e1267a5
DM		 2084 next;
2085 }
51bae274 2086 if (!$section) {
961b4928 2087 warn "$prefix: skip line - no section";
5e1267a5
DM		 2088 next;
2089 }
2090
2d404ffc
DM		 2091 next if !$res->{$section}; # skip undefined section
2092
2093 if ($section eq 'options') {
2094 eval {
2d404ffc
DM		 2095 my ($opt, $value) = parse_hostfw_option($line);
2096 $res->{options}->{$opt} = $value;
2097 };
2098 warn "$prefix: $@" if $@;
2099 next;
2100 }
2101
e5076eee
DM		 2102 my $rule;
2103 eval { $rule = parse_fw_rule($line, 1, 1); };
ecbea048 2104 if (my $err = $@) {
961b4928 2105 warn "$prefix: $err";
ecbea048 2106 next;
ecbea048 2107 }
cbb5d6f3 2108
e5076eee 2109 push @{$res->{$section}}, $rule;
51bae274 2110 }
ecbea048 2111
51bae274
DM		 2112 return $res;
2113}
4cdbb3b7 2114
c6f5cc88 2115sub parse_cluster_fw_rules {
51bae274 2116 my ($filename, $fh) = @_;
5e1267a5 2117
51bae274
DM		 2118 my $section;
2119 my $group;
2120
e34d0e58
DM		 2121 my $res = {
2122 rules => [],
2123 options => {},
2124 aliases => {},
2125 groups => {},
2126 group_comments => {},
d72c631c 2127 ipset => {} ,
e34d0e58 2128 ipset_comments => {},
0d22acb3 2129 };
6158271d 2130
51bae274
DM		 2131 while (defined(my $line = <$fh>)) {
2132 next if $line =~ m/^#/;
2133 next if $line =~ m/^\s*$/;
2134
961b4928
DM		 2135 my $linenr = $fh->input_line_number();
2136 my $prefix = "$filename (line $linenr)";
2137
c6f5cc88
DM		 2138 if ($line =~ m/^\[options\]$/i) {
2139 $section = 'options';
2140 next;
2141 }
2142
92e1209b
AD		 2143 if ($line =~ m/^\[aliases\]$/i) {
2144 $section = 'aliases';
2145 next;
2146 }
2147
0d22acb3 2148 if ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
c6f5cc88 2149 $section = 'groups';
92e976b3 2150 $group = lc($1);
0d22acb3 2151 my $comment = $2;
c85c87f9 2152 $res->{$section}->{$group} = [];
649e4d57
DM		 2153 $res->{group_comments}->{$group} = decode('utf8', $comment)
2154 if $comment;
51bae274
DM		 2155 next;
2156 }
34cdedfa 2157
c6f5cc88
DM		 2158 if ($line =~ m/^\[rules\]$/i) {
2159 $section = 'rules';
2160 next;
2161 }
cbb5d6f3 2162
d72c631c 2163 if ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
34cdedfa
AD		 2164 $section = 'ipset';
2165 $group = lc($1);
d72c631c 2166 my $comment = $2;
c85c87f9 2167 $res->{$section}->{$group} = [];
e34d0e58 2168 $res->{ipset_comments}->{$group} = decode('utf8', $comment)
649e4d57 2169 if $comment;
34cdedfa
AD		 2170 next;
2171 }
2172
c6f5cc88 2173 if (!$section) {
cbb5d6f3 2174 warn "$prefix: skip line - no section\n";
51bae274
DM		 2175 next;
2176 }
2177
c6f5cc88
DM		 2178 if ($section eq 'options') {
2179 eval {
2180 my ($opt, $value) = parse_clusterfw_option($line);
2181 $res->{options}->{$opt} = $value;
2182 };
2183 warn "$prefix: $@" if $@;
92e1209b
AD		 2184 } elsif ($section eq 'aliases') {
2185 eval {
e76a9f53 2186 my $data = parse_alias($line);
81d574a7 2187 $res->{aliases}->{lc($data->{name})} = $data;
92e1209b
AD		 2188 };
2189 warn "$prefix: $@" if $@;
c6f5cc88
DM		 2190 } elsif ($section eq 'rules') {
2191 my $rule;
2192 eval { $rule = parse_fw_rule($line, 1, 1); };
2193 if (my $err = $@) {
2194 warn "$prefix: $err";
2195 next;
2196 }
2197 push @{$res->{$section}}, $rule;
2198 } elsif ($section eq 'groups') {
34cdedfa
AD		 2199 my $rule;
2200 eval { $rule = parse_fw_rule($line, 0, 0); };
2201 if (my $err = $@) {
2202 warn "$prefix: $err";
2203 next;
2204 }
3f95d14a 2205 push @{$res->{$section}->{$group}}, $rule;
3f95d14a 2206 } elsif ($section eq 'ipset') {
9d6f90e6
DM		 2207 # we can add single line comments to the end of the rule
2208 my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2209
30f1b100 2210 $line =~ m/^(\!)?\s*(\S+)\s*$/;
2a052ee3 2211 my $nomatch = $1;
9d6f90e6 2212 my $cidr = $2;
2a052ee3 2213
44be8ceb 2214 if($cidr !~ m/^${ip_alias_pattern}$/) {
92e1209b 2215 $cidr =~ s|/32$||;
e34d0e58 2216
92e1209b
AD		 2217 eval { pve_verify_ipv4_or_cidr($cidr); };
2218 if (my $err = $@) {
2219 warn "$prefix: $cidr - $err";
2220 next;
2221 }
2a052ee3 2222 }
2a052ee3 2223
e34d0e58 2224 my $entry = { cidr => $cidr };
9d6f90e6
DM		 2225 $entry->{nomatch} = 1 if $nomatch;
2226 $entry->{comment} = $comment if $comment;
e34d0e58 2227
9d6f90e6 2228 push @{$res->{$section}->{$group}}, $entry;
51bae274 2229 }
5e1267a5
DM		 2230 }
2231
2232 return $res;
2233}
2234
06320eb0
DM		 2235sub run_locked {
2236 my ($code, @param) = @_;
2237
2238 my $timeout = 10;
2239
2240 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2241
2242 die $@ if $@;
2243
2244 return $res;
2245}
2246
5e1267a5
DM		 2247sub read_local_vm_config {
2248
2249 my $openvz = {};
5e1267a5
DM		 2250 my $qemu = {};
2251
c8301d63 2252 my $vmdata = { openvz => $openvz, qemu => $qemu };
5e1267a5 2253
c8301d63
DM		 2254 my $vmlist = PVE::Cluster::get_vmlist();
2255 return $vmdata if !$vmlist || !$vmlist->{ids};
2256 my $ids = $vmlist->{ids};
2257
2258 foreach my $vmid (keys %$ids) {
2259 next if !$vmid; # skip VE0
2260 my $d = $ids->{$vmid};
2261 next if !$d->{node} || $d->{node} ne $nodename;
2262 next if !$d->{type};
2263 if ($d->{type} eq 'openvz') {
d9fee004
DM		 2264 if ($have_pve_manager) {
2265 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2266 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2267 $openvz->{$vmid} = $conf;
2268 }
c8301d63
DM		 2269 }
2270 } elsif ($d->{type} eq 'qemu') {
d9fee004
DM		 2271 if ($have_qemu_server) {
2272 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2273 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2274 $qemu->{$vmid} = $conf;
2275 }
c8301d63 2276 }
5e1267a5
DM		 2277 }
2278 }
d9fee004 2279
5e1267a5
DM		 2280 return $vmdata;
2281};
2282
e7b35711 2283sub load_vmfw_conf {
8aef5177 2284 my ($vmid, $dir) = @_;
e7b35711
DM		 2285
2286 my $vmfw_conf = {};
2287
8aef5177
DM		 2288 $dir = "/etc/pve/firewall" if !defined($dir);
2289
2290 my $filename = "$dir/$vmid.fw";
e7b35711
DM		 2291 if (my $fh = IO::File->new($filename, O_RDONLY)) {
2292 $vmfw_conf = parse_vm_fw_rules($filename, $fh);
2293 }
2294
2295 return $vmfw_conf;
2296}
2297
464f933e 2298my $format_rules = sub {
dba740a9 2299 my ($rules, $allow_iface) = @_;
464f933e
DM		 2300
2301 my $raw = '';
2302
2303 foreach my $rule (@$rules) {
c14dacdf 2304 if ($rule->{type} eq 'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
464f933e
DM		 2305 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2306 $raw .= uc($rule->{type});
7ca36671
DM		 2307 if ($rule->{macro}) {
2308 $raw .= " $rule->{macro}($rule->{action})";
2309 } else {
2310 $raw .= " " . $rule->{action};
2311 }
dba740a9
DM		 2312 if ($allow_iface && $rule->{iface}) {
2313 $raw .= " -i $rule->{iface}";
2314 }
c14dacdf
DM		 2315
2316 if ($rule->{type} ne 'group') {
dba740a9
DM		 2317 $raw .= " -source $rule->{source}" if $rule->{source};
2318 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2319 $raw .= " -p $rule->{proto}" if $rule->{proto};
2320 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2321 $raw .= " -sport $rule->{sport}" if $rule->{sport};
c14dacdf
DM		 2322 }
2323
cbb5d6f3 2324 $raw .= " # " . encode('utf8', $rule->{comment})
464f933e
DM		 2325 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2326 $raw .= "\n";
2327 } else {
c14dacdf 2328 die "unknown rule type '$rule->{type}'";
464f933e
DM		 2329 }
2330 }
2331
2332 return $raw;
2333};
2334
2335my $format_options = sub {
68c90e21
DM		 2336 my ($options) = @_;
2337
2338 my $raw = '';
464f933e
DM		 2339
2340 $raw .= "[OPTIONS]\n\n";
2341 foreach my $opt (keys %$options) {
2342 $raw .= "$opt: $options->{$opt}\n";
2343 }
2344 $raw .= "\n";
68c90e21
DM		 2345
2346 return $raw;
464f933e
DM		 2347};
2348
0d5f0a0f
DM		 2349my $format_aliases = sub {
2350 my ($aliases) = @_;
2351
2352 my $raw = '';
2353
2354 $raw .= "[ALIASES]\n\n";
2355 foreach my $k (keys %$aliases) {
81d574a7
DM		 2356 my $e = $aliases->{$k};
2357 $raw .= "$e->{name} $e->{cidr}";
2358 $raw .= " # " . encode('utf8', $e->{comment})
2359 if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2360 $raw .= "\n";
0d5f0a0f
DM		 2361 }
2362 $raw .= "\n";
2363
2364 return $raw;
2365};
2366
9d6f90e6
DM		 2367my $format_ipset = sub {
2368 my ($options) = @_;
2369
2370 my $raw = '';
2371
6e299ae3 2372 my $nethash = {};
9d6f90e6 2373 foreach my $entry (@$options) {
6e299ae3
DM		 2374 $nethash->{$entry->{cidr}} = $entry;
2375 }
2376
2377 foreach my $cidr (sort keys %$nethash) {
2378 my $entry = $nethash->{$cidr};
9d6f90e6
DM		 2379 my $line = $entry->{nomatch} ? '!' : '';
2380 $line .= $entry->{cidr};
2381 $line .= " # " . encode('utf8', $entry->{comment})
2382 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2383 $raw .= "$line\n";
2384 }
e34d0e58 2385
9d6f90e6
DM		 2386 return $raw;
2387};
2388
464f933e
DM		 2389sub save_vmfw_conf {
2390 my ($vmid, $vmfw_conf) = @_;
2391
2392 my $raw = '';
2393
2394 my $options = $vmfw_conf->{options};
68c90e21 2395 $raw .= &$format_options($options) if scalar(keys %$options);
cbb5d6f3 2396
e76a9f53
DM		 2397 my $aliases = $vmfw_conf->{aliases};
2398 $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
2399
8824b2f0 2400 my $rules = $vmfw_conf->{rules} || [];
464f933e
DM		 2401 if (scalar(@$rules)) {
2402 $raw .= "[RULES]\n\n";
2403 $raw .= &$format_rules($rules, 1);
2404 $raw .= "\n";
2405 }
2406
2407 my $filename = "/etc/pve/firewall/$vmid.fw";
2408 PVE::Tools::file_set_contents($filename, $raw);
2409}
2410
6fc63ffd 2411sub read_vm_firewall_configs {
8aef5177
DM		 2412 my ($vmdata, $dir) = @_;
2413
6fc63ffd 2414 my $vmfw_configs = {};
c8301d63 2415
5e1267a5 2416 foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
8aef5177 2417 my $vmfw_conf = load_vmfw_conf($vmid, $dir);
e7b35711
DM		 2418 next if !$vmfw_conf->{options}; # skip if file does not exists
2419 $vmfw_configs->{$vmid} = $vmfw_conf;
5e1267a5
DM		 2420 }
2421
6fc63ffd 2422 return $vmfw_configs;
5e1267a5
DM		 2423}
2424
2d404ffc
DM		 2425sub get_option_log_level {
2426 my ($options, $k) = @_;
2427
2428 my $v = $options->{$k};
178a63be 2429 $v = $default_log_level if !defined($v);
2d404ffc
DM		 2430
2431 return undef if $v eq '' || $v eq 'nolog';
2432
2433 $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2434
2435 return $v if ($v >= 0) && ($v <= 7);
2436
2437 warn "unknown log level ($k = '$v')\n";
2438
2439 return undef;
2440}
2441
d8f2505e 2442sub generate_std_chains {
2d404ffc 2443 my ($ruleset, $options) = @_;
cbb5d6f3 2444
2d404ffc
DM		 2445 my $loglevel = get_option_log_level($options, 'smurf_log_level');
2446
2447 # same as shorewall smurflog.
782c4cde 2448 my $chain = 'PVEFW-smurflog';
12f3796e 2449 $pve_std_chains->{$chain} = [];
782c4cde
DM		 2450
2451 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2452 push @{$pve_std_chains->{$chain}}, "-j DROP";
2d404ffc
DM		 2453
2454 # same as shorewall logflags action.
2455 $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
782c4cde 2456 $chain = 'PVEFW-logflags';
12f3796e
DM		 2457 $pve_std_chains->{$chain} = [];
2458
782c4cde
DM		 2459 # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2460 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2461 push @{$pve_std_chains->{$chain}}, "-j DROP";
d8f2505e
DM		 2462
2463 foreach my $chain (keys %$pve_std_chains) {
2464 ruleset_create_chain($ruleset, $chain);
2465 foreach my $rule (@{$pve_std_chains->{$chain}}) {
2466 if (ref($rule)) {
2467 ruleset_generate_rule($ruleset, $chain, $rule);
2468 } else {
2469 ruleset_addrule($ruleset, $chain, $rule);
2470 }
2471 }
2472 }
2473}
2474
34cdedfa 2475sub generate_ipset_chains {
dd7a13fd 2476 my ($ipset_ruleset, $fw_conf) = @_;
34cdedfa 2477
dd7a13fd 2478 foreach my $ipset (keys %{$fw_conf->{ipset}}) {
92e1209b 2479 generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset}, $fw_conf->{aliases});
34cdedfa
AD		 2480 }
2481}
2482
2483sub generate_ipset {
92e1209b 2484 my ($ipset_ruleset, $name, $options, $aliases) = @_;
34cdedfa 2485
dd7a13fd
DM		 2486 my $hashsize = scalar(@$options);
2487 if ($hashsize <= 64) {
2a052ee3 2488 $hashsize = 64;
dd7a13fd 2489 } else {
2a052ee3
AD		 2490 $hashsize = round_powerof2($hashsize);
2491 }
2492
dd7a13fd 2493 push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
34cdedfa 2494
30f1b100
DM		 2495 # remove duplicates
2496 my $nethash = {};
9d6f90e6 2497 foreach my $entry (@$options) {
92e1209b 2498 my $cidr = $entry->{cidr};
d4091b82 2499 if ($cidr =~ m/^${ip_alias_pattern}$/) {
81d574a7
DM		 2500 my $alias = lc($cidr);
2501 if ($aliases->{$alias}) {
2502 $entry->{cidr} = $aliases->{$alias}->{cidr};
7dd13259 2503 $nethash->{$entry->{cidr}} = $entry;
d4091b82 2504 } else {
81d574a7 2505 warn "no such alias '$cidr'\n" if !$aliases->{$alias};
d4091b82 2506 }
7dd13259
DM		 2507 } else {
2508 $nethash->{$entry->{cidr}} = $entry;
92e1209b 2509 }
30f1b100
DM		 2510 }
2511
2512 foreach my $cidr (sort keys %$nethash) {
2513 my $entry = $nethash->{$cidr};
2514
9d6f90e6
DM		 2515 my $cmd = "add $name $cidr";
2516 if ($entry->{nomatch}) {
2517 if ($feature_ipset_nomatch) {
2518 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2519 } else {
2520 warn "ignore !$cidr - nomatch not supported by kernel\n";
2521 }
2522 } else {
2523 push @{$ipset_ruleset->{$name}}, $cmd;
2524 }
34cdedfa 2525 }
2a052ee3
AD		 2526}
2527
2528sub round_powerof2 {
dd7a13fd 2529 my ($int) = @_;
2a052ee3 2530
dd7a13fd
DM		 2531 $int--;
2532 $int |= $int >> $_ foreach (1,2,4,8,16);
2533 return ++$int;
34cdedfa
AD		 2534}
2535
fca39c2c 2536sub load_clusterfw_conf {
8aef5177
DM		 2537 my ($filename) = @_;
2538
2539 $filename = $clusterfw_conf_filename if !defined($filename);
530c005e 2540
fca39c2c 2541 my $cluster_conf = {};
8aef5177
DM		 2542 if (my $fh = IO::File->new($filename, O_RDONLY)) {
2543 $cluster_conf = parse_cluster_fw_rules($filename, $fh);
51bae274 2544 }
5e1267a5 2545
fca39c2c 2546 return $cluster_conf;
e5d76bde
DM		 2547}
2548
fca39c2c
DM		 2549sub save_clusterfw_conf {
2550 my ($cluster_conf) = @_;
9c7e0858
DM		 2551
2552 my $raw = '';
9c7e0858 2553
c6f5cc88 2554 my $options = $cluster_conf->{options};
68c90e21 2555 $raw .= &$format_options($options) if scalar(keys %$options);
9c7e0858 2556
0d5f0a0f
DM		 2557 my $aliases = $cluster_conf->{aliases};
2558 $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
e34d0e58 2559
9d6f90e6 2560 foreach my $ipset (sort keys %{$cluster_conf->{ipset}}) {
d72c631c 2561 if (my $comment = $cluster_conf->{ipset_comments}->{$ipset}) {
649e4d57
DM		 2562 my $utf8comment = encode('utf8', $comment);
2563 $raw .= "[IPSET $ipset] # $utf8comment\n\n";
d72c631c
DM		 2564 } else {
2565 $raw .= "[IPSET $ipset]\n\n";
2566 }
9d6f90e6
DM		 2567 my $options = $cluster_conf->{ipset}->{$ipset};
2568 $raw .= &$format_ipset($options);
2569 $raw .= "\n";
2570 }
c6f5cc88
DM		 2571
2572 my $rules = $cluster_conf->{rules};
2573 if (scalar(@$rules)) {
2574 $raw .= "[RULES]\n\n";
63c91681 2575 $raw .= &$format_rules($rules, 1);
c6f5cc88
DM		 2576 $raw .= "\n";
2577 }
2578
2579 foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2580 my $rules = $cluster_conf->{groups}->{$group};
0d22acb3 2581 if (my $comment = $cluster_conf->{group_comments}->{$group}) {
649e4d57
DM		 2582 my $utf8comment = encode('utf8', $comment);
2583 $raw .= "[group $group] # $utf8comment\n\n";
0d22acb3
DM		 2584 } else {
2585 $raw .= "[group $group]\n\n";
2586 }
2587
63c91681 2588 $raw .= &$format_rules($rules, 0);
9c7e0858
DM		 2589 $raw .= "\n";
2590 }
2591
fca39c2c 2592 PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
9c7e0858
DM		 2593}
2594
8b27beb9 2595sub load_hostfw_conf {
8aef5177
DM		 2596 my ($filename) = @_;
2597
2598 $filename = $hostfw_conf_filename if !defined($filename);
8b27beb9
DM		 2599
2600 my $hostfw_conf = {};
8aef5177
DM		 2601 if (my $fh = IO::File->new($filename, O_RDONLY)) {
2602 $hostfw_conf = parse_host_fw_rules($filename, $fh);
8b27beb9
DM		 2603 }
2604 return $hostfw_conf;
2605}
2606
63c91681
DM		 2607sub save_hostfw_conf {
2608 my ($hostfw_conf) = @_;
2609
2610 my $raw = '';
2611
2612 my $options = $hostfw_conf->{options};
68c90e21 2613 $raw .= &$format_options($options) if scalar(keys %$options);
cbb5d6f3 2614
63c91681
DM		 2615 my $rules = $hostfw_conf->{rules};
2616 if (scalar(@$rules)) {
2617 $raw .= "[RULES]\n\n";
2618 $raw .= &$format_rules($rules, 1);
2619 $raw .= "\n";
2620 }
2621
2622 PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2623}
2624
e5d76bde 2625sub compile {
8aef5177 2626 my ($cluster_conf, $hostfw_conf, $vmdata) = @_;
3dfa8a7f 2627
8aef5177
DM		 2628 my $vmfw_configs;
2629
2630 if ($vmdata) { # test mode
2631 my $testdir = $vmdata->{testdir} || die "no test directory specified";
2632 my $filename = "$testdir/cluster.fw";
8aef5177
DM		 2633 $cluster_conf = load_clusterfw_conf($filename);
2634
2635 $filename = "$testdir/host.fw";
8aef5177
DM		 2636 $hostfw_conf = load_hostfw_conf($filename);
2637
2638 $vmfw_configs = read_vm_firewall_configs($vmdata, $testdir);
2639 } else { # normal operation
2640 $cluster_conf = load_clusterfw_conf() if !$cluster_conf;
2641
2642 $hostfw_conf = load_hostfw_conf() if !$hostfw_conf;
2643
2644 $vmdata = read_local_vm_config();
2645 $vmfw_configs = read_vm_firewall_configs($vmdata);
2646 }
3dfa8a7f 2647
e5d76bde 2648
27083984 2649 $cluster_conf->{ipset}->{venet0} = [];
eb399cef 2650
525778d7
DM		 2651 my $localnet;
2652 if ($cluster_conf->{aliases}->{local_network}) {
2653 $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2654 } else {
2655 $localnet = local_network() || '127.0.0.0/8';
2656 $cluster_conf->{aliases}->{local_network} = { cidr => $localnet };
2657 }
2658
2659 push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
eb399cef 2660
3fa83edf
DM		 2661 my $ruleset = {};
2662
dec84fcd
DM		 2663 ruleset_create_chain($ruleset, "PVEFW-INPUT");
2664 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
5b1df9a0 2665
fadb13dd 2666 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
e34d0e58 2667
8b27beb9 2668 my $hostfw_options = $hostfw_conf->{options} || {};
fadb13dd 2669
88733a74
AD		 2670 # fixme: what log level should we use here?
2671 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2672
097820b0 2673 ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
88733a74 2674
e2943485 2675 ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
27083984
AD		 2676 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set PVEFW-venet0 src -j PVEFW-VENET-OUT");
2677 ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set PVEFW-venet0 src -j PVEFW-VENET-OUT");
e2943485
DM		 2678
2679 ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
2428e394 2680 ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options, $cluster_conf, $loglevel);
e2943485 2681
d1b41c08 2682 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
e2943485
DM		 2683
2684 ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
d1b41c08 2685 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
e2943485
DM		 2686
2687 ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
2428e394 2688 ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options, $cluster_conf, $loglevel);
e2943485 2689
27083984 2690 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set PVEFW-venet0 dst -j PVEFW-VENET-IN");
e2943485 2691
92e976b3 2692 generate_std_chains($ruleset, $hostfw_options);
fadb13dd 2693
6d2ab017 2694 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2d404ffc 2695
1a9978ed
DM		 2696 if ($hostfw_enable) {
2697 eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf); };
2698 warn $@ if $@; # just to be sure - should not happen
2699 }
3fa83edf 2700
27083984 2701 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set PVEFW-venet0 dst -j PVEFW-VENET-IN");
62689a1e 2702
6158271d 2703 # generate firewall rules for QEMU VMs
3fa83edf 2704 foreach my $vmid (keys %{$vmdata->{qemu}}) {
1a9978ed
DM		 2705 eval {
2706 my $conf = $vmdata->{qemu}->{$vmid};
2707 my $vmfw_conf = $vmfw_configs->{$vmid};
2708 return if !$vmfw_conf;
2709 return if !$vmfw_conf->{options}->{enable};
2710
2711 foreach my $netid (keys %$conf) {
2712 next if $netid !~ m/^net(\d+)$/;
2713 my $net = PVE::QemuServer::parse_net($conf->{$netid});
2714 next if !$net->{firewall};
2715 my $iface = "tap${vmid}i$1";
2716
2717 my $macaddr = $net->{macaddr};
2718 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2719 $vmfw_conf, $vmid, 'IN');
2720 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2721 $vmfw_conf, $vmid, 'OUT');
2722 }
2723 };
2724 warn $@ if $@; # just to be sure - should not happen
3fa83edf 2725 }
c8301d63
DM		 2726
2727 # generate firewall rules for OpenVZ containers
2728 foreach my $vmid (keys %{$vmdata->{openvz}}) {
1a9978ed
DM		 2729 eval {
2730 my $conf = $vmdata->{openvz}->{$vmid};
c8301d63 2731
1a9978ed
DM		 2732 my $vmfw_conf = $vmfw_configs->{$vmid};
2733 return if !$vmfw_conf;
2734 return if !$vmfw_conf->{options}->{enable};
c8301d63 2735
1a9978ed
DM		 2736 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2737 my $ip = $conf->{ip_address}->{value};
2738 $ip =~ s/\s+/,/g;
2739 parse_address_list($ip); # make sure we have a valid $ip list
27083984 2740
1a9978ed 2741 my @ips = split(',', $ip);
27083984 2742
1a9978ed
DM		 2743 foreach my $singleip (@ips) {
2744 my $venet0ipset = {};
2745 $venet0ipset->{cidr} = $singleip;
2746 push @{$cluster_conf->{ipset}->{venet0}}, $venet0ipset;
2747 }
c8301d63 2748
1a9978ed
DM		 2749 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2750 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2751 }
530c005e 2752
1a9978ed
DM		 2753 if ($conf->{netif} && $conf->{netif}->{value}) {
2754 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2755 foreach my $netid (keys %$netif) {
2756 my $d = $netif->{$netid};
2757
2758 my $macaddr = $d->{mac};
2759 my $iface = $d->{host_ifname};
2760 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2761 $vmfw_conf, $vmid, 'IN');
2762 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2763 $vmfw_conf, $vmid, 'OUT');
2764 }
c8301d63 2765 }
1a9978ed
DM		 2766 };
2767 warn $@ if $@; # just to be sure - should not happen
c8301d63 2768 }
c0413e35 2769
097820b0
AD		 2770 if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
2771 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
2772 }
2773
27083984
AD		 2774 my $ipset_ruleset = {};
2775 generate_ipset_chains($ipset_ruleset, $cluster_conf);
2776
3dfa8a7f 2777 return ($ruleset, $ipset_ruleset);
3fa83edf
DM		 2778}
2779
2780sub get_ruleset_status {
4bd0a9c4 2781 my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3fa83edf
DM		 2782
2783 my $statushash = {};
2784
2785 foreach my $chain (sort keys %$ruleset) {
4bd0a9c4 2786 my $sig = &$digest_fn($ruleset->{$chain});
9bf7d929 2787
3fa83edf
DM		 2788 $statushash->{$chain}->{sig} = $sig;
2789
2790 my $oldsig = $active_chains->{$chain};
2791 if (!defined($oldsig)) {
2792 $statushash->{$chain}->{action} = 'create';
2793 } else {
2794 if ($oldsig eq $sig) {
2795 $statushash->{$chain}->{action} = 'exists';
2796 } else {
2797 $statushash->{$chain}->{action} = 'update';
2798 }
2799 }
2800 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2801 foreach my $cmd (@{$ruleset->{$chain}}) {
2802 print "\t$cmd\n" if $verbose;
2803 }
2804 }
2805
2806 foreach my $chain (sort keys %$active_chains) {
2807 if (!defined($ruleset->{$chain})) {
2808 my $sig = $active_chains->{$chain};
2809 $statushash->{$chain}->{action} = 'delete';
2810 $statushash->{$chain}->{sig} = $sig;
2811 print "delete $chain ($sig)\n" if $verbose;
2812 }
6158271d 2813 }
2a052ee3 2814
3fa83edf
DM		 2815 return $statushash;
2816}
2817
3fa83edf
DM		 2818sub print_sig_rule {
2819 my ($chain, $sig) = @_;
2820
09d5f68e
DM		 2821 # We just use this to store a SHA1 checksum used to detect changes
2822 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
b6360c3f
DM		 2823}
2824
df7cb349 2825sub get_ruleset_cmdlist {
a84f4d96 2826 my ($ruleset, $verbose) = @_;
3fa83edf 2827
3fa83edf 2828 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
cbb5d6f3 2829
4bd0a9c4
DM		 2830 my ($active_chains, $hooks) = iptables_get_chains();
2831 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3fa83edf
DM		 2832
2833 # create missing chains first
2834 foreach my $chain (sort keys %$ruleset) {
2835 my $stat = $statushash->{$chain};
2836 die "internal error" if !$stat;
2837 next if $stat->{action} ne 'create';
886aba9c 2838
3fa83edf
DM		 2839 $cmdlist .= ":$chain - [0:0]\n";
2840 }
2841
4bd0a9c4
DM		 2842 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2843 if (!$hooks->{$h}) {
2844 $cmdlist .= "-A $h -j PVEFW-$h\n";
2845 }
3fa83edf
DM		 2846 }
2847
2848 foreach my $chain (sort keys %$ruleset) {
2849 my $stat = $statushash->{$chain};
2850 die "internal error" if !$stat;
2851
2852 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2853 $cmdlist .= "-F $chain\n";
2854 foreach my $cmd (@{$ruleset->{$chain}}) {
2855 $cmdlist .= "$cmd\n";
2856 }
2857 $cmdlist .= print_sig_rule($chain, $stat->{sig});
2858 } elsif ($stat->{action} eq 'delete') {
f5d28682 2859 die "internal error"; # this should not happen
3fa83edf
DM		 2860 } elsif ($stat->{action} eq 'exists') {
2861 # do nothing
2862 } else {
2863 die "internal error - unknown status '$stat->{action}'";
2864 }
2865 }
2866
f5d28682
DM		 2867 foreach my $chain (keys %$statushash) {
2868 next if $statushash->{$chain}->{action} ne 'delete';
2869 $cmdlist .= "-F $chain\n";
2870 }
2871 foreach my $chain (keys %$statushash) {
2872 next if $statushash->{$chain}->{action} ne 'delete';
fadb13dd
DM		 2873 next if $chain eq 'PVEFW-INPUT';
2874 next if $chain eq 'PVEFW-OUTPUT';
2875 next if $chain eq 'PVEFW-FORWARD';
f5d28682
DM		 2876 $cmdlist .= "-X $chain\n";
2877 }
2878
3f95d14a 2879 my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
4bd0a9c4 2880
3fa83edf
DM		 2881 $cmdlist .= "COMMIT\n";
2882
3f95d14a 2883 return wantarray ? ($cmdlist, $changes) : $cmdlist;
6b9f68a2
DM		 2884}
2885
34cdedfa 2886sub get_ipset_cmdlist {
dd7a13fd 2887 my ($ruleset, $verbose) = @_;
34cdedfa
AD		 2888
2889 my $cmdlist = "";
2890
dd7a13fd
DM		 2891 my $delete_cmdlist = "";
2892
4bd0a9c4
DM		 2893 my $active_chains = ipset_get_chains();
2894 my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
34cdedfa 2895
e34d0e58 2896 # remove stale _swap chains
30f1b100
DM		 2897 foreach my $chain (keys %$active_chains) {
2898 if ($chain =~ m/^PVEFW-\S+_swap$/) {
2899 $cmdlist .= "destroy $chain\n";
2900 }
2901 }
2902
dd7a13fd
DM		 2903 foreach my $chain (sort keys %$ruleset) {
2904 my $stat = $statushash->{$chain};
2905 die "internal error" if !$stat;
2a052ee3 2906
dd7a13fd
DM		 2907 if ($stat->{action} eq 'create') {
2908 foreach my $cmd (@{$ruleset->{$chain}}) {
34cdedfa
AD		 2909 $cmdlist .= "$cmd\n";
2910 }
dd7a13fd 2911 }
34cdedfa 2912
dd7a13fd
DM		 2913 if ($stat->{action} eq 'update') {
2914 my $chain_swap = $chain."_swap";
cbb5d6f3 2915
dd7a13fd
DM		 2916 foreach my $cmd (@{$ruleset->{$chain}}) {
2917 $cmd =~ s/$chain/$chain_swap/;
2918 $cmdlist .= "$cmd\n";
34cdedfa 2919 }
dd7a13fd
DM		 2920 $cmdlist .= "swap $chain_swap $chain\n";
2921 $cmdlist .= "flush $chain_swap\n";
2922 $cmdlist .= "destroy $chain_swap\n";
2a052ee3 2923 }
34cdedfa 2924
dd7a13fd 2925 }
3f95d14a 2926
dd7a13fd
DM		 2927 foreach my $chain (keys %$statushash) {
2928 next if $statushash->{$chain}->{action} ne 'delete';
2a052ee3 2929
dd7a13fd
DM		 2930 $delete_cmdlist .= "flush $chain\n";
2931 $delete_cmdlist .= "destroy $chain\n";
34cdedfa
AD		 2932 }
2933
dd7a13fd 2934 my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
cbb5d6f3 2935
dd7a13fd 2936 return ($cmdlist, $delete_cmdlist, $changes);
34cdedfa
AD		 2937}
2938
6b9f68a2 2939sub apply_ruleset {
34cdedfa 2940 my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
6b9f68a2
DM		 2941
2942 enable_bridge_firewall();
2943
cbb5d6f3 2944 my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
81a0bf43 2945 get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
6b9f68a2 2946
81a0bf43 2947 my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
2a052ee3 2948
81a0bf43
DM		 2949 if ($verbose) {
2950 if ($ipset_changes) {
2951 print "ipset changes:\n";
2952 print $ipset_create_cmdlist if $ipset_create_cmdlist;
2953 print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2954 }
3f95d14a 2955
81a0bf43
DM		 2956 if ($changes) {
2957 print "iptables changes:\n";
2958 print $cmdlist;
2959 }
2960 }
3fa83edf 2961
2a052ee3 2962 ipset_restore_cmdlist($ipset_create_cmdlist);
34cdedfa 2963
3fa83edf
DM		 2964 iptables_restore_cmdlist($cmdlist);
2965
dd7a13fd 2966 ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2a052ee3 2967
6158271d 2968 # test: re-read status and check if everything is up to date
4bd0a9c4 2969 my $active_chains = iptables_get_chains();
81a0bf43 2970 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3fa83edf
DM		 2971
2972 my $errors;
2973 foreach my $chain (sort keys %$ruleset) {
2974 my $stat = $statushash->{$chain};
2975 if ($stat->{action} ne 'exists') {
2976 warn "unable to update chain '$chain'\n";
2977 $errors = 1;
2978 }
2979 }
b6360c3f 2980
3fa83edf 2981 die "unable to apply firewall changes\n" if $errors;
46a2ac1f
AD		 2982
2983 update_nf_conntrack_max($hostfw_conf);
2984
2985 update_nf_conntrack_tcp_timeout_established($hostfw_conf);
2986
b6360c3f
DM		 2987}
2988
490cdead
DM		 2989sub update_nf_conntrack_max {
2990 my ($hostfw_conf) = @_;
2991
2992 my $max = 65536; # reasonable default
2993
2994 my $options = $hostfw_conf->{options} || {};
2995
2996 if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2997 $max = $options->{nf_conntrack_max};
2998 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2999 }
3000
3001 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3002 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3003
3004 my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3005
3006 if ($current != $max) {
3007 my $hashsize = int($max/4);
3008 PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3009 PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3010 }
3011}
3012
28c082a1
AD		 3013sub update_nf_conntrack_tcp_timeout_established {
3014 my ($hostfw_conf) = @_;
3015
3016 my $options = $hostfw_conf->{options} || {};
3017
3018 my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3019
3020 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3021}
3022
c4a2e5ae
DM		 3023sub remove_pvefw_chains {
3024
3025 my ($chash, $hooks) = iptables_get_chains();
3026 my $cmdlist = "*filter\n";
3027
3028 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3029 if ($hooks->{$h}) {
3030 $cmdlist .= "-D $h -j PVEFW-$h\n";
3031 }
3032 }
cbb5d6f3 3033
c4a2e5ae
DM		 3034 foreach my $chain (keys %$chash) {
3035 $cmdlist .= "-F $chain\n";
3036 }
3037
3038 foreach my $chain (keys %$chash) {
3039 $cmdlist .= "-X $chain\n";
3040 }
3041 $cmdlist .= "COMMIT\n";
3042
3043 iptables_restore_cmdlist($cmdlist);
3044}
3045
8b453a09
DM		 3046sub init {
3047 my $cluster_conf = load_clusterfw_conf();
3048 my $cluster_options = $cluster_conf->{options};
3049 my $enable = $cluster_options->{enable};
3050
3051 return if !$enable;
3052
3053 # load required modules here
3054}
3055
6b9f68a2 3056sub update {
e2beb7aa 3057 my ($verbose) = @_;
6b9f68a2
DM		 3058
3059 my $code = sub {
3dfa8a7f
DM		 3060
3061 my $cluster_conf = load_clusterfw_conf();
3062 my $cluster_options = $cluster_conf->{options};
3063
51e57fee 3064 my $enable = $cluster_options->{enable};
3dfa8a7f 3065
e2beb7aa 3066 die "Firewall is disabled - cannot start\n" if !$enable;
3dfa8a7f
DM		 3067
3068 if (!$enable) {
b22130d3 3069 PVE::Firewall::remove_pvefw_chains();
3dfa8a7f
DM		 3070 print "Firewall disabled\n" if $verbose;
3071 return;
3072 }
3073
3074 my $hostfw_conf = load_hostfw_conf();
3075
3076 my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
490cdead 3077
e2beb7aa 3078 apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
6b9f68a2
DM		 3079 };
3080
3081 run_locked($code);
3082}
3083
b6360c3f 30841;
Firewall test scripts