correctly encode section comments as utf8
[pve-firewall.git] / src / PVE / Firewall.pm
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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;
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15use File::Path;
16use IO::File;
ecbea048 17use Net::IP;
06320eb0 18use PVE::Tools qw(run_command lock_file);
30c1ae52 19use Encode;
ecbea048 20
63c91681 21my $hostfw_conf_filename = "/etc/pve/local/host.fw";
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22my $clusterfw_conf_filename = "/etc/pve/firewall/cluster.fw";
23
cbb5d6f3 24# dynamically include PVE::QemuServer and PVE::OpenVZ
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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 $have_pve_manager = 1;
36};
37
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38PVE::JSONSchema::register_format('IPv4orCIDR', \&pve_verify_ipv4_or_cidr);
39sub pve_verify_ipv4_or_cidr {
40 my ($cidr, $noerr) = @_;
41
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42 if ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
43 return $cidr if Net::IP->new($cidr);
44 return undef if $noerr;
45 die Net::IP::Error() . "\n";
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46 }
47 return undef if $noerr;
48 die "value does not look like a valid IP address or CIDR network\n";
49}
50
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51PVE::JSONSchema::register_standard_option('ipset-name', {
52 description => "IP set name.",
53 type => 'string',
54 pattern => '[A-Za-z][A-Za-z0-9\-\_]+',
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55 minLength => 2,
56 maxLength => 20,
57});
58
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59my $security_group_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
60
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61PVE::JSONSchema::register_standard_option('pve-security-group-name', {
62 description => "Security Group name.",
63 type => 'string',
c14dacdf 64 pattern => $security_group_pattern,
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65 minLength => 2,
66 maxLength => 20,
e74a87f5 67});
009ee3ac 68
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69my $feature_ipset_nomatch = 0;
70eval {
71 my (undef, undef, $release) = POSIX::uname();
72 if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
73 my ($major, $minor) = ($1, $2);
74 $feature_ipset_nomatch = 1 if ($major > 3) ||
75 ($major == 3 && $minor >= 7);
76 }
77
78};
79
5e1267a5 80use Data::Dumper;
b6360c3f 81
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82my $nodename = PVE::INotify::nodename();
83
06320eb0 84my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
6b9f68a2 85my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
06320eb0 86
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87my $default_log_level = 'info';
88
89my $log_level_hash = {
90 debug => 7,
91 info => 6,
92 notice => 5,
93 warning => 4,
94 err => 3,
95 crit => 2,
96 alert => 1,
97 emerg => 0,
98};
99
857f62c8 100# imported/converted from: /usr/share/shorewall/macro.*
961b4928 101my $pve_fw_macros = {
857f62c8 102 'Amanda' => [
ebd54ae9 103 "Amanda Backup",
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104 { action => 'PARAM', proto => 'udp', dport => '10080' },
105 { action => 'PARAM', proto => 'tcp', dport => '10080' },
106 ],
107 'Auth' => [
ebd54ae9 108 "Auth (identd) traffic",
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109 { action => 'PARAM', proto => 'tcp', dport => '113' },
110 ],
111 'BGP' => [
ebd54ae9 112 "Border Gateway Protocol traffic",
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113 { action => 'PARAM', proto => 'tcp', dport => '179' },
114 ],
115 'BitTorrent' => [
ebd54ae9 116 "BitTorrent traffic for BitTorrent 3.1 and earlier",
961b4928 117 { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
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118 { action => 'PARAM', proto => 'udp', dport => '6881' },
119 ],
120 'BitTorrent32' => [
ebd54ae9 121 "BitTorrent traffic for BitTorrent 3.2 and later",
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122 { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
123 { action => 'PARAM', proto => 'udp', dport => '6881' },
124 ],
125 'CVS' => [
ebd54ae9 126 "Concurrent Versions System pserver traffic",
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127 { action => 'PARAM', proto => 'tcp', dport => '2401' },
128 ],
129 'Citrix' => [
ebd54ae9 130 "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
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131 { action => 'PARAM', proto => 'tcp', dport => '1494' },
132 { action => 'PARAM', proto => 'udp', dport => '1604' },
133 { action => 'PARAM', proto => 'tcp', dport => '2598' },
134 ],
135 'DAAP' => [
ebd54ae9 136 "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
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137 { action => 'PARAM', proto => 'tcp', dport => '3689' },
138 { action => 'PARAM', proto => 'udp', dport => '3689' },
139 ],
140 'DCC' => [
ebd54ae9 141 "Distributed Checksum Clearinghouse spam filtering mechanism",
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142 { action => 'PARAM', proto => 'tcp', dport => '6277' },
143 ],
144 'DHCPfwd' => [
ebd54ae9 145 "Forwarded DHCP traffic (bidirectional)",
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146 { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
147 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' },
148 ],
149 'DNS' => [
ebd54ae9 150 "Domain Name System traffic (upd and tcp)",
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151 { action => 'PARAM', proto => 'udp', dport => '53' },
152 { action => 'PARAM', proto => 'tcp', dport => '53' },
153 ],
154 'Distcc' => [
ebd54ae9 155 "Distributed Compiler service",
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156 { action => 'PARAM', proto => 'tcp', dport => '3632' },
157 ],
857f62c8 158 'FTP' => [
ebd54ae9 159 "File Transfer Protocol",
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160 { action => 'PARAM', proto => 'tcp', dport => '21' },
161 ],
162 'Finger' => [
ebd54ae9 163 "Finger protocol (RFC 742)",
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164 { action => 'PARAM', proto => 'tcp', dport => '79' },
165 ],
166 'GNUnet' => [
ebd54ae9 167 "GNUnet secure peer-to-peer networking traffic",
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168 { action => 'PARAM', proto => 'tcp', dport => '2086' },
169 { action => 'PARAM', proto => 'udp', dport => '2086' },
170 { action => 'PARAM', proto => 'tcp', dport => '1080' },
171 { action => 'PARAM', proto => 'udp', dport => '1080' },
172 ],
173 'GRE' => [
ebd54ae9 174 "Generic Routing Encapsulation tunneling protocol (bidirectional)",
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175 { action => 'PARAM', proto => '47' },
176 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
177 ],
178 'Git' => [
ebd54ae9 179 "Git distributed revision control traffic",
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180 { action => 'PARAM', proto => 'tcp', dport => '9418' },
181 ],
857f62c8 182 'HKP' => [
ebd54ae9 183 "OpenPGP HTTP keyserver protocol traffic",
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184 { action => 'PARAM', proto => 'tcp', dport => '11371' },
185 ],
186 'HTTP' => [
ebd54ae9 187 "Hypertext Transfer Protocol (WWW)",
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188 { action => 'PARAM', proto => 'tcp', dport => '80' },
189 ],
857f62c8 190 'HTTPS' => [
ebd54ae9 191 "Hypertext Transfer Protocol (WWW) over SSL",
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192 { action => 'PARAM', proto => 'tcp', dport => '443' },
193 ],
194 'ICPV2' => [
ebd54ae9 195 "Internet Cache Protocol V2 (Squid) traffic",
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196 { action => 'PARAM', proto => 'udp', dport => '3130' },
197 ],
198 'ICQ' => [
ebd54ae9 199 "AOL Instant Messenger traffic",
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200 { action => 'PARAM', proto => 'tcp', dport => '5190' },
201 ],
202 'IMAP' => [
ebd54ae9 203 "Internet Message Access Protocol",
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204 { action => 'PARAM', proto => 'tcp', dport => '143' },
205 ],
206 'IMAPS' => [
ebd54ae9 207 "Internet Message Access Protocol over SSL",
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208 { action => 'PARAM', proto => 'tcp', dport => '993' },
209 ],
210 'IPIP' => [
ebd54ae9 211 "IPIP capsulation traffic (bidirectional)",
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212 { action => 'PARAM', proto => '94' },
213 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' },
214 ],
857f62c8 215 'IPsec' => [
ebd54ae9 216 "IPsec traffic (bidirectional)",
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217 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
218 { action => 'PARAM', proto => '50' },
219 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
220 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
221 ],
222 'IPsecah' => [
ebd54ae9 223 "IPsec authentication (AH) traffic (bidirectional)",
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224 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
225 { action => 'PARAM', proto => '51' },
226 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
227 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' },
228 ],
229 'IPsecnat' => [
ebd54ae9 230 "IPsec traffic and Nat-Traversal (bidirectional)",
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231 { action => 'PARAM', proto => 'udp', dport => '500' },
232 { action => 'PARAM', proto => 'udp', dport => '4500' },
233 { action => 'PARAM', proto => '50' },
234 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' },
235 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' },
236 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
237 ],
238 'IRC' => [
ebd54ae9 239 "Internet Relay Chat traffic",
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240 { action => 'PARAM', proto => 'tcp', dport => '6667' },
241 ],
857f62c8 242 'Jetdirect' => [
ebd54ae9 243 "HP Jetdirect printing",
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244 { action => 'PARAM', proto => 'tcp', dport => '9100' },
245 ],
246 'L2TP' => [
ebd54ae9 247 "Layer 2 Tunneling Protocol traffic",
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248 { action => 'PARAM', proto => 'udp', dport => '1701' },
249 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' },
250 ],
251 'LDAP' => [
ebd54ae9 252 "Lightweight Directory Access Protocol traffic",
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253 { action => 'PARAM', proto => 'tcp', dport => '389' },
254 ],
255 'LDAPS' => [
ebd54ae9 256 "Secure Lightweight Directory Access Protocol traffic",
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257 { action => 'PARAM', proto => 'tcp', dport => '636' },
258 ],
259 'MSNP' => [
ebd54ae9 260 "Microsoft Notification Protocol",
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261 { action => 'PARAM', proto => 'tcp', dport => '1863' },
262 ],
263 'MSSQL' => [
ebd54ae9 264 "Microsoft SQL Server",
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265 { action => 'PARAM', proto => 'tcp', dport => '1433' },
266 ],
267 'Mail' => [
ebd54ae9 268 "Mail traffic (SMTP, SMTPS, Submission)",
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269 { action => 'PARAM', proto => 'tcp', dport => '25' },
270 { action => 'PARAM', proto => 'tcp', dport => '465' },
271 { action => 'PARAM', proto => 'tcp', dport => '587' },
272 ],
273 'Munin' => [
ebd54ae9 274 "Munin networked resource monitoring traffic",
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275 { action => 'PARAM', proto => 'tcp', dport => '4949' },
276 ],
277 'MySQL' => [
ebd54ae9 278 "MySQL server",
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279 { action => 'PARAM', proto => 'tcp', dport => '3306' },
280 ],
281 'NNTP' => [
ebd54ae9 282 "NNTP traffic (Usenet).",
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283 { action => 'PARAM', proto => 'tcp', dport => '119' },
284 ],
285 'NNTPS' => [
ebd54ae9 286 "Encrypted NNTP traffic (Usenet)",
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287 { action => 'PARAM', proto => 'tcp', dport => '563' },
288 ],
289 'NTP' => [
ebd54ae9 290 "Network Time Protocol (ntpd)",
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291 { action => 'PARAM', proto => 'udp', dport => '123' },
292 ],
293 'NTPbi' => [
ebd54ae9 294 "Bi-directional NTP (for NTP peers)",
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295 { action => 'PARAM', proto => 'udp', dport => '123' },
296 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' },
297 ],
857f62c8 298 'OSPF' => [
ebd54ae9 299 "OSPF multicast traffic",
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300 { action => 'PARAM', proto => '89' },
301 ],
302 'OpenVPN' => [
ebd54ae9 303 "OpenVPN traffic",
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304 { action => 'PARAM', proto => 'udp', dport => '1194' },
305 ],
306 'PCA' => [
ebd54ae9 307 "Symantec PCAnywere (tm)",
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308 { action => 'PARAM', proto => 'udp', dport => '5632' },
309 { action => 'PARAM', proto => 'tcp', dport => '5631' },
310 ],
311 'POP3' => [
ebd54ae9 312 "POP3 traffic",
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313 { action => 'PARAM', proto => 'tcp', dport => '110' },
314 ],
315 'POP3S' => [
ebd54ae9 316 "Encrypted POP3 traffic",
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317 { action => 'PARAM', proto => 'tcp', dport => '995' },
318 ],
319 'PPtP' => [
ebd54ae9 320 "Point-to-Point Tunneling Protocol",
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321 { action => 'PARAM', proto => '47' },
322 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
323 { action => 'PARAM', proto => 'tcp', dport => '1723' },
324 ],
325 'Ping' => [
ebd54ae9 326 "ICMP echo request",
269d4f13 327 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
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328 ],
329 'PostgreSQL' => [
ebd54ae9 330 "PostgreSQL server",
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331 { action => 'PARAM', proto => 'tcp', dport => '5432' },
332 ],
333 'Printer' => [
ebd54ae9 334 "Line Printer protocol printing",
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335 { action => 'PARAM', proto => 'tcp', dport => '515' },
336 ],
337 'RDP' => [
ebd54ae9 338 "Microsoft Remote Desktop Protocol traffic",
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339 { action => 'PARAM', proto => 'tcp', dport => '3389' },
340 ],
341 'RIPbi' => [
ebd54ae9 342 "Routing Information Protocol (bidirectional)",
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343 { action => 'PARAM', proto => 'udp', dport => '520' },
344 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' },
345 ],
346 'RNDC' => [
ebd54ae9 347 "BIND remote management protocol",
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348 { action => 'PARAM', proto => 'tcp', dport => '953' },
349 ],
350 'Razor' => [
ebd54ae9 351 "Razor Antispam System",
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352 { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
353 ],
354 'Rdate' => [
ebd54ae9 355 "Remote time retrieval (rdate)",
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356 { action => 'PARAM', proto => 'tcp', dport => '37' },
357 ],
358 'Rsync' => [
ebd54ae9 359 "Rsync server",
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360 { action => 'PARAM', proto => 'tcp', dport => '873' },
361 ],
362 'SANE' => [
ebd54ae9 363 "SANE network scanning",
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364 { action => 'PARAM', proto => 'tcp', dport => '6566' },
365 ],
366 'SMB' => [
ebd54ae9 367 "Microsoft SMB traffic",
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368 { action => 'PARAM', proto => 'udp', dport => '135,445' },
369 { action => 'PARAM', proto => 'udp', dport => '137:139' },
370 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
371 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
372 ],
373 'SMBBI' => [
ebd54ae9 374 "Microsoft SMB traffic (bidirectional)",
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375 { action => 'PARAM', proto => 'udp', dport => '135,445' },
376 { action => 'PARAM', proto => 'udp', dport => '137:139' },
377 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
378 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
379 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' },
380 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' },
381 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' },
382 { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' },
383 ],
384 'SMBswat' => [
ebd54ae9 385 "Samba Web Administration Tool",
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386 { action => 'PARAM', proto => 'tcp', dport => '901' },
387 ],
388 'SMTP' => [
ebd54ae9 389 "Simple Mail Transfer Protocol",
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390 { action => 'PARAM', proto => 'tcp', dport => '25' },
391 ],
392 'SMTPS' => [
ebd54ae9 393 "Encrypted Simple Mail Transfer Protocol",
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394 { action => 'PARAM', proto => 'tcp', dport => '465' },
395 ],
396 'SNMP' => [
ebd54ae9 397 "Simple Network Management Protocol",
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398 { action => 'PARAM', proto => 'udp', dport => '161:162' },
399 { action => 'PARAM', proto => 'tcp', dport => '161' },
400 ],
401 'SPAMD' => [
ebd54ae9 402 "Spam Assassin SPAMD traffic",
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403 { action => 'PARAM', proto => 'tcp', dport => '783' },
404 ],
405 'SSH' => [
ebd54ae9 406 "Secure shell traffic",
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407 { action => 'PARAM', proto => 'tcp', dport => '22' },
408 ],
409 'SVN' => [
ebd54ae9 410 "Subversion server (svnserve)",
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411 { action => 'PARAM', proto => 'tcp', dport => '3690' },
412 ],
413 'SixXS' => [
ebd54ae9 414 "SixXS IPv6 Deployment and Tunnel Broker",
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415 { action => 'PARAM', proto => 'tcp', dport => '3874' },
416 { action => 'PARAM', proto => 'udp', dport => '3740' },
417 { action => 'PARAM', proto => '41' },
418 { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
419 ],
420 'Squid' => [
ebd54ae9 421 "Squid web proxy traffic",
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422 { action => 'PARAM', proto => 'tcp', dport => '3128' },
423 ],
424 'Submission' => [
ebd54ae9 425 "Mail message submission traffic",
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426 { action => 'PARAM', proto => 'tcp', dport => '587' },
427 ],
428 'Syslog' => [
ebd54ae9 429 "Syslog protocol (RFC 5424) traffic",
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430 { action => 'PARAM', proto => 'udp', dport => '514' },
431 { action => 'PARAM', proto => 'tcp', dport => '514' },
432 ],
433 'TFTP' => [
ebd54ae9 434 "Trivial File Transfer Protocol traffic",
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435 { action => 'PARAM', proto => 'udp', dport => '69' },
436 ],
437 'Telnet' => [
ebd54ae9 438 "Telnet traffic",
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439 { action => 'PARAM', proto => 'tcp', dport => '23' },
440 ],
441 'Telnets' => [
ebd54ae9 442 "Telnet over SSL",
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443 { action => 'PARAM', proto => 'tcp', dport => '992' },
444 ],
445 'Time' => [
ebd54ae9 446 "RFC 868 Time protocol",
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447 { action => 'PARAM', proto => 'tcp', dport => '37' },
448 ],
449 'Trcrt' => [
ebd54ae9 450 "Traceroute (for up to 30 hops) traffic",
857f62c8 451 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
269d4f13 452 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
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453 ],
454 'VNC' => [
ebd54ae9 455 "VNC traffic for VNC display's 0 - 9",
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456 { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
457 ],
458 'VNCL' => [
ebd54ae9 459 "VNC traffic from Vncservers to Vncviewers in listen mode",
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460 { action => 'PARAM', proto => 'tcp', dport => '5500' },
461 ],
462 'Web' => [
ebd54ae9 463 "WWW traffic (HTTP and HTTPS)",
857f62c8 464 { action => 'PARAM', proto => 'tcp', dport => '80' },
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465 { action => 'PARAM', proto => 'tcp', dport => '443' },
466 ],
857f62c8 467 'Webcache' => [
ebd54ae9 468 "Web Cache/Proxy traffic (port 8080)",
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469 { action => 'PARAM', proto => 'tcp', dport => '8080' },
470 ],
471 'Webmin' => [
ebd54ae9 472 "Webmin traffic",
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473 { action => 'PARAM', proto => 'tcp', dport => '10000' },
474 ],
475 'Whois' => [
ebd54ae9 476 "Whois (nicname, RFC 3912) traffic",
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477 { action => 'PARAM', proto => 'tcp', dport => '43' },
478 ],
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479};
480
481my $pve_fw_parsed_macros;
ebd54ae9 482my $pve_fw_macro_descr;
961b4928 483my $pve_fw_preferred_macro_names = {};
3a616aa0 484
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485my $pve_std_chains = {
486 'PVEFW-SET-ACCEPT-MARK' => [
487 "-j MARK --set-mark 1",
488 ],
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489 'PVEFW-DropBroadcast' => [
490 # same as shorewall 'Broadcast'
491 # simply DROP BROADCAST/MULTICAST/ANYCAST
492 # we can use this to reduce logging
493 { action => 'DROP', dsttype => 'BROADCAST' },
494 { action => 'DROP', dsttype => 'MULTICAST' },
495 { action => 'DROP', dsttype => 'ANYCAST' },
cbb5d6f3 496 { action => 'DROP', dest => '224.0.0.0/4' },
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497 ],
498 'PVEFW-reject' => [
499 # same as shorewall 'reject'
500 { action => 'DROP', dsttype => 'BROADCAST' },
cbb5d6f3 501 { action => 'DROP', source => '224.0.0.0/4' },
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502 { action => 'DROP', proto => 'icmp' },
503 "-p tcp -j REJECT --reject-with tcp-reset",
504 "-p udp -j REJECT --reject-with icmp-port-unreachable",
505 "-p icmp -j REJECT --reject-with icmp-host-unreachable",
506 "-j REJECT --reject-with icmp-host-prohibited",
507 ],
508 'PVEFW-Drop' => [
cbb5d6f3 509 # same as shorewall 'Drop', which is equal to DROP,
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510 # but REJECT/DROP some packages to reduce logging,
511 # and ACCEPT critical ICMP types
512 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
513 # we are not interested in BROADCAST/MULTICAST/ANYCAST
514 { action => 'PVEFW-DropBroadcast' },
515 # ACCEPT critical ICMP types
516 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
517 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
518 # Drop packets with INVALID state
519 "-m conntrack --ctstate INVALID -j DROP",
520 # Drop Microsoft SMB noise
521 { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
522 { action => 'DROP', proto => 'udp', dport => '137:139'},
523 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
524 { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
525 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
526 # Drop new/NotSyn traffic so that it doesn't get logged
527 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
528 # Drop DNS replies
529 { action => 'DROP', proto => 'udp', sport => 53 },
530 ],
531 'PVEFW-Reject' => [
cbb5d6f3 532 # same as shorewall 'Reject', which is equal to Reject,
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533 # but REJECT/DROP some packages to reduce logging,
534 # and ACCEPT critical ICMP types
535 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
536 # we are not interested in BROADCAST/MULTICAST/ANYCAST
537 { action => 'PVEFW-DropBroadcast' },
538 # ACCEPT critical ICMP types
539 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
540 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
541 # Drop packets with INVALID state
542 "-m conntrack --ctstate INVALID -j DROP",
543 # Drop Microsoft SMB noise
544 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
545 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
546 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
547 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
548 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
549 # Drop new/NotSyn traffic so that it doesn't get logged
550 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
551 # Drop DNS replies
552 { action => 'DROP', proto => 'udp', sport => 53 },
553 ],
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554 'PVEFW-tcpflags' => [
555 # same as shorewall tcpflags action.
556 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
557 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
558 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
559 "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
560 "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
561 "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
562 ],
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563 'PVEFW-smurfs' => [
564 # same as shorewall smurfs action
565 # Filter packets for smurfs (packets with a broadcast address as the source).
566 "-s 0.0.0.0/32 -j RETURN",
567 "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
568 "-s 224.0.0.0/4 -g PVEFW-smurflog",
569 ],
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570};
571
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572# iptables -p icmp -h
573my $icmp_type_names = {
574 any => 1,
575 'echo-reply' => 1,
576 'destination-unreachable' => 1,
577 'network-unreachable' => 1,
578 'host-unreachable' => 1,
579 'protocol-unreachable' => 1,
580 'port-unreachable' => 1,
581 'fragmentation-needed' => 1,
582 'source-route-failed' => 1,
583 'network-unknown' => 1,
584 'host-unknown' => 1,
585 'network-prohibited' => 1,
586 'host-prohibited' => 1,
587 'TOS-network-unreachable' => 1,
588 'TOS-host-unreachable' => 1,
589 'communication-prohibited' => 1,
590 'host-precedence-violation' => 1,
591 'precedence-cutoff' => 1,
592 'source-quench' => 1,
593 'redirect' => 1,
594 'network-redirect' => 1,
595 'host-redirect' => 1,
596 'TOS-network-redirect' => 1,
597 'TOS-host-redirect' => 1,
598 'echo-request' => 1,
599 'router-advertisement' => 1,
600 'router-solicitation' => 1,
601 'time-exceeded' => 1,
602 'ttl-zero-during-transit' => 1,
603 'ttl-zero-during-reassembly' => 1,
604 'parameter-problem' => 1,
605 'ip-header-bad' => 1,
606 'required-option-missing' => 1,
607 'timestamp-request' => 1,
608 'timestamp-reply' => 1,
609 'address-mask-request' => 1,
610 'address-mask-reply' => 1,
611};
612
54cd19a8 613sub init_firewall_macros {
6158271d 614
961b4928 615 $pve_fw_parsed_macros = {};
9aab3127 616
961b4928 617 foreach my $k (keys %$pve_fw_macros) {
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618 my $lc_name = lc($k);
619 my $macro = $pve_fw_macros->{$k};
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620 if (!ref($macro->[0])) {
621 $pve_fw_macro_descr->{$k} = shift @$macro;
622 }
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623 $pve_fw_preferred_macro_names->{$lc_name} = $k;
624 $pve_fw_parsed_macros->{$k} = $macro;
961b4928 625 }
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626}
627
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628init_firewall_macros();
629
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630sub get_macros {
631 return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
632}
633
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634my $etc_services;
635
636sub get_etc_services {
637
638 return $etc_services if $etc_services;
639
640 my $filename = "/etc/services";
641
642 my $fh = IO::File->new($filename, O_RDONLY);
643 if (!$fh) {
644 warn "unable to read '$filename' - $!\n";
645 return {};
646 }
647
648 my $services = {};
649
650 while (my $line = <$fh>) {
651 chomp ($line);
652 next if $line =~m/^#/;
653 next if ($line =~m/^\s*$/);
654
655 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
656 $services->{byid}->{$2}->{name} = $1;
35b66e9d 657 $services->{byid}->{$2}->{port} = $2;
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658 $services->{byid}->{$2}->{$3} = 1;
659 $services->{byname}->{$1} = $services->{byid}->{$2};
660 }
661 }
662
663 close($fh);
664
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665 $etc_services = $services;
666
3a616aa0 667
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668 return $etc_services;
669}
670
671my $etc_protocols;
672
673sub get_etc_protocols {
674 return $etc_protocols if $etc_protocols;
675
676 my $filename = "/etc/protocols";
677
678 my $fh = IO::File->new($filename, O_RDONLY);
679 if (!$fh) {
680 warn "unable to read '$filename' - $!\n";
681 return {};
682 }
683
684 my $protocols = {};
685
686 while (my $line = <$fh>) {
687 chomp ($line);
688 next if $line =~m/^#/;
689 next if ($line =~m/^\s*$/);
690
691 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
692 $protocols->{byid}->{$2}->{name} = $1;
693 $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
694 }
695 }
696
697 close($fh);
698
699 $etc_protocols = $protocols;
700
701 return $etc_protocols;
702}
703
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704sub parse_address_list {
705 my ($str) = @_;
706
28311400 707 return if $str =~ m/^(\+)(\S+)$/; # ipset ref
d72beb8e 708
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709 my $count = 0;
710 my $iprange = 0;
711 foreach my $elem (split(/,/, $str)) {
712 $count++;
713 if (!Net::IP->new($elem)) {
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714 my $err = Net::IP::Error();
715 die "invalid IP address: $err\n";
716 }
3162af6b 717 $iprange = 1 if $elem =~ m/-/;
ecbea048 718 }
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719
720 die "you can use a range in a list\n" if $iprange && $count > 1;
ecbea048 721}
dddd9413 722
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723sub parse_port_name_number_or_range {
724 my ($str) = @_;
725
726 my $services = PVE::Firewall::get_etc_services();
7ca36671 727 my $count = 0;
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728 my $icmp_port = 0;
729
fcba0beb 730 foreach my $item (split(/,/, $str)) {
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731 $count++;
732 if ($item =~ m/^(\d+):(\d+)$/) {
733 my ($port1, $port2) = ($1, $2);
734 die "invalid port '$port1'\n" if $port1 > 65535;
735 die "invalid port '$port2'\n" if $port2 > 65535;
736 } elsif ($item =~ m/^(\d+)$/) {
737 my $port = $1;
738 die "invalid port '$port'\n" if $port > 65535;
739 } else {
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740 if ($icmp_type_names->{$item}) {
741 $icmp_port = 1;
742 } else {
743 die "invalid port '$item'\n" if !$services->{byname}->{$item};
744 }
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745 }
746 }
747
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748 die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
749
7ca36671 750 return $count;
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751}
752
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753PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
754sub pve_fw_verify_port_spec {
755 my ($portstr) = @_;
756
7ca36671 757 parse_port_name_number_or_range($portstr);
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758
759 return $portstr;
760}
761
762PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
763sub pve_fw_verify_v4addr_spec {
764 my ($list) = @_;
765
766 parse_address_list($list);
767
768 return $list;
769}
770
771PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
772sub pve_fw_verify_protocol_spec {
773 my ($proto) = @_;
774
775 my $protocols = get_etc_protocols();
776
777 die "unknown protocol '$proto'\n" if $proto &&
778 !(defined($protocols->{byname}->{$proto}) ||
779 defined($protocols->{byid}->{$proto}));
780
781 return $proto;
782}
783
784
d1c53b3e 785# helper function for API
d1c53b3e 786
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787my $rule_properties = {
788 pos => {
789 description => "Update rule at position <pos>.",
790 type => 'integer',
791 minimum => 0,
792 optional => 1,
793 },
c71e785f 794 digest => get_standard_option('pve-config-digest'),
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795 type => {
796 type => 'string',
797 optional => 1,
798 enum => ['in', 'out', 'group'],
799 },
800 action => {
c14dacdf 801 description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
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802 type => 'string',
803 optional => 1,
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804 pattern => $security_group_pattern,
805 maxLength => 20,
806 minLength => 2,
9c7e0858 807 },
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808 macro => {
809 type => 'string',
810 optional => 1,
54cd19a8 811 maxLength => 128,
e5076eee 812 },
54cd19a8 813 iface => get_standard_option('pve-iface', { optional => 1 }),
9c7e0858 814 source => {
54cd19a8 815 type => 'string', format => 'pve-fw-v4addr-spec',
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816 optional => 1,
817 },
818 dest => {
54cd19a8 819 type => 'string', format => 'pve-fw-v4addr-spec',
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820 optional => 1,
821 },
822 proto => {
54cd19a8 823 type => 'string', format => 'pve-fw-protocol-spec',
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824 optional => 1,
825 },
826 enable => {
827 type => 'boolean',
828 optional => 1,
829 },
830 sport => {
54cd19a8 831 type => 'string', format => 'pve-fw-port-spec',
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832 optional => 1,
833 },
834 dport => {
54cd19a8 835 type => 'string', format => 'pve-fw-port-spec',
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836 optional => 1,
837 },
838 comment => {
839 type => 'string',
840 optional => 1,
841 },
842};
843
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844sub cleanup_fw_rule {
845 my ($rule, $digest, $pos) = @_;
846
847 my $r = {};
848
849 foreach my $k (keys %$rule) {
850 next if !$rule_properties->{$k};
851 my $v = $rule->{$k};
852 next if !defined($v);
853 $r->{$k} = $v;
854 $r->{digest} = $digest;
855 $r->{pos} = $pos;
856 }
857
858 return $r;
859}
860
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861sub add_rule_properties {
862 my ($properties) = @_;
863
864 foreach my $k (keys %$rule_properties) {
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865 my $h = $rule_properties->{$k};
866 # copy data, so that we can modify later without side effects
867 foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
9c7e0858 868 }
cbb5d6f3 869
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870 return $properties;
871}
872
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873sub delete_rule_properties {
874 my ($rule, $delete_str) = @_;
875
876 foreach my $opt (PVE::Tools::split_list($delete_str)) {
877 raise_param_exc({ 'delete' => "no such property ('$opt')"})
878 if !defined($rule_properties->{$opt});
879 raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
880 if $opt eq 'type' || $opt eq 'action';
881 delete $rule->{$opt};
882 }
883
884 return $rule;
885}
886
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887my $apply_macro = sub {
888 my ($macro_name, $param, $verify) = @_;
889
890 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
891 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
892
893 my $rules = [];
894
895 foreach my $templ (@$macro_rules) {
896 my $rule = {};
897 my $param_used = {};
898 foreach my $k (keys %$templ) {
899 my $v = $templ->{$k};
900 if ($v eq 'PARAM') {
901 $v = $param->{$k};
902 $param_used->{$k} = 1;
903 } elsif ($v eq 'DEST') {
904 $v = $param->{dest};
905 $param_used->{dest} = 1;
906 } elsif ($v eq 'SOURCE') {
907 $v = $param->{source};
908 $param_used->{source} = 1;
909 }
910
911 if (!defined($v)) {
912 my $msg = "missing parameter '$k' in macro '$macro_name'";
913 raise_param_exc({ macro => $msg }) if $verify;
914 die "$msg\n";
915 }
916 $rule->{$k} = $v;
917 }
918 foreach my $k (keys %$param) {
919 next if $k eq 'macro';
920 next if !defined($param->{$k});
921 next if $param_used->{$k};
922 if (defined($rule->{$k})) {
923 if ($rule->{$k} ne $param->{$k}) {
924 my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
925 raise_param_exc({ $k => $msg }) if $verify;
926 die "$msg\n";
927 }
928 } else {
929 $rule->{$k} = $param->{$k};
930 }
931 }
932 push @$rules, $rule;
933 }
934
935 return $rules;
936};
937
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938sub verify_rule {
939 my ($rule, $allow_groups) = @_;
940
941 my $type = $rule->{type};
942
943 raise_param_exc({ type => "missing property"}) if !$type;
944 raise_param_exc({ action => "missing property"}) if !$rule->{action};
945
946 if ($type eq 'in' || $type eq 'out') {
947 raise_param_exc({ action => "unknown action '$rule->{action}'"})
948 if $rule->{action} !~ m/^(ACCEPT|DROP|REJECT)$/;
949 } elsif ($type eq 'group') {
950 raise_param_exc({ type => "security groups not allowed"})
951 if !$allow_groups;
952 raise_param_exc({ action => "invalid characters in security group name"})
c14dacdf 953 if $rule->{action} !~ m/^${security_group_pattern}$/;
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954 } else {
955 raise_param_exc({ type => "unknown rule type '$type'"});
956 }
957
958 # fixme: verify $rule->{iface}?
959
960 if ($rule->{macro}) {
961 my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})};
962 raise_param_exc({ macro => "unknown macro '$rule->{macro}'"}) if !$preferred_name;
963 $rule->{macro} = $preferred_name;
964 }
965
966 if ($rule->{dport}) {
967 eval { parse_port_name_number_or_range($rule->{dport}); };
968 raise_param_exc({ dport => $@ }) if $@;
969 }
970
971 if ($rule->{sport}) {
972 eval { parse_port_name_number_or_range($rule->{sport}); };
973 raise_param_exc({ sport => $@ }) if $@;
974 }
975
976 if ($rule->{source}) {
977 eval { parse_address_list($rule->{source}); };
978 raise_param_exc({ source => $@ }) if $@;
979 }
980
981 if ($rule->{dest}) {
982 eval { parse_address_list($rule->{dest}); };
983 raise_param_exc({ dest => $@ }) if $@;
984 }
985
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986 if ($rule->{macro}) {
987 &$apply_macro($rule->{macro}, $rule, 1);
988 }
989
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990 return $rule;
991}
992
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993sub copy_rule_data {
994 my ($rule, $param) = @_;
995
996 foreach my $k (keys %$rule_properties) {
997 if (defined(my $v = $param->{$k})) {
998 if ($v eq '' || $v eq '-') {
999 delete $rule->{$k};
1000 } else {
1001 $rule->{$k} = $v;
1002 }
1003 } else {
1004 delete $rule->{$k};
1005 }
1006 }
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1007
1008 # verify rule now
1009
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1010 return $rule;
1011}
1012
1013# core functions
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1014my $bridge_firewall_enabled = 0;
1015
1016sub enable_bridge_firewall {
1017
1018 return if $bridge_firewall_enabled; # only once
1019
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1020 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1021 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
780bcc0f 1022
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1023 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1024 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1025
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1026 $bridge_firewall_enabled = 1;
1027}
1028
8cebfa6f 1029my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
dddd9413 1030
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1031sub iptables_restore_cmdlist {
1032 my ($cmdlist) = @_;
3a616aa0 1033
3fa83edf 1034 run_command("/sbin/iptables-restore -n", input => $cmdlist);
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1035}
1036
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1037sub ipset_restore_cmdlist {
1038 my ($cmdlist) = @_;
1039
dd7a13fd 1040 run_command("/usr/sbin/ipset restore", input => $cmdlist);
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1041}
1042
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1043sub iptables_get_chains {
1044
1045 my $res = {};
1046
1047 # check what chains we want to track
1048 my $is_pvefw_chain = sub {
1049 my $name = shift;
1050
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1051 return 1 if $name =~ m/^PVEFW-\S+$/;
1052
de2a57cd 1053 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
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1054
1055 return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1056
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1057 return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1058
da6fc60b 1059 return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT|IPS)$/;
f50656c2 1060 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
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1061
1062 return undef;
1063 };
1064
1065 my $table = '';
1066
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1067 my $hooks = {};
1068
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1069 my $parser = sub {
1070 my $line = shift;
1071
1072 return if $line =~ m/^#/;
1073 return if $line =~ m/^\s*$/;
1074
1075 if ($line =~ m/^\*(\S+)$/) {
1076 $table = $1;
1077 return;
1078 }
1079
1080 return if $table ne 'filter';
1081
1082 if ($line =~ m/^:(\S+)\s/) {
1083 my $chain = $1;
1084 return if !&$is_pvefw_chain($chain);
3fa83edf 1085 $res->{$chain} = "unknown";
09d5f68e 1086 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
3fa83edf 1087 my ($chain, $sig) = ($1, $2);
de2a57cd 1088 return if !&$is_pvefw_chain($chain);
3fa83edf 1089 $res->{$chain} = $sig;
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1090 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1091 $hooks->{$1} = 1;
de2a57cd
DM
1092 } else {
1093 # simply ignore the rest
1094 return;
1095 }
1096 };
1097
1098 run_command("/sbin/iptables-save", outfunc => $parser);
1099
c4a2e5ae 1100 return wantarray ? ($res, $hooks) : $res;
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DM
1101}
1102
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1103sub iptables_chain_digest {
1104 my ($rules) = @_;
1105 my $digest = Digest::SHA->new('sha1');
1106 foreach my $rule (@$rules) { # order is important
1107 $digest->add($rule);
1108 }
1109 return $digest->b64digest;
1110}
1111
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1112sub ipset_chain_digest {
1113 my ($rules) = @_;
4bd0a9c4 1114
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1115 my $digest = Digest::SHA->new('sha1');
1116 foreach my $rule (sort @$rules) { # note: sorted
1117 $digest->add($rule);
1118 }
1119 return $digest->b64digest;
1120}
1121
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1122sub ipset_get_chains {
1123
1124 my $res = {};
1125 my $chains = {};
1126
1127 my $parser = sub {
1128 my $line = shift;
1129
1130 return if $line =~ m/^#/;
1131 return if $line =~ m/^\s*$/;
4b96e877 1132 if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
81a0bf43
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1133 my $chain = $1;
1134 $line =~ s/\s+$//; # delete trailing white space
1135 push @{$chains->{$chain}}, $line;
34cdedfa
AD
1136 } else {
1137 # simply ignore the rest
1138 return;
1139 }
1140 };
1141
3f95d14a 1142 run_command("/usr/sbin/ipset save", outfunc => $parser);
34cdedfa 1143
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1144 # compute digest for each chain
1145 foreach my $chain (keys %$chains) {
1146 $res->{$chain} = ipset_chain_digest($chains->{$chain});
34cdedfa
AD
1147 }
1148
1149 return $res;
1150}
1151
eba0fb64 1152sub ruleset_generate_cmdstr {
ba791b1f 1153 my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
3a616aa0 1154
00bb4391 1155 return if defined($rule->{enable}) && !$rule->{enable};
11bac5c2 1156
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1157 die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1158
1159 my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1160 my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
e5076eee 1161
41524a58 1162 my @cmd = ();
3a616aa0 1163
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1164 push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1165 push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1166
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1167 my $source = $rule->{source};
1168 my $dest = $rule->{dest};
1169
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1170 if ($source) {
1171 if ($source =~ m/^(\+)(\S+)$/) {
936af352 1172 die "no such ipset $2" if !$cluster_conf->{ipset}->{$2};
4b96e877 1173 push @cmd, "-m set --match-set PVEFW-$2 src";
ba791b1f 1174
ac8242cc 1175 } elsif ($source =~ m/\-/){
ba791b1f
AD
1176 push @cmd, "-m iprange --src-range $source";
1177
cbb5d6f3 1178 } else {
ba791b1f
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1179 push @cmd, "-s $source";
1180 }
1181 }
1182
cbb5d6f3
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1183 if ($dest) {
1184 if ($dest =~ m/^(\+)(\S+)$/) {
936af352 1185 die "no such ipset $2" if !$cluster_conf->{ipset}->{$2};
4b96e877 1186 push @cmd, "-m set --match-set PVEFW-$2 dst";
ba791b1f 1187
cbb5d6f3 1188 } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
ba791b1f
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1189 push @cmd, "-m iprange --dst-range $dest";
1190
cbb5d6f3 1191 } else {
ba791b1f
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1192 push @cmd, "-s $dest";
1193 }
1194 }
4b586518 1195
181390b0 1196 if ($rule->{proto}) {
41524a58 1197 push @cmd, "-p $rule->{proto}";
e3a1d391 1198
181390b0 1199 my $multiport = 0;
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1200 $multiport++ if $nbdport > 1;
1201 $multiport++ if $nbsport > 1;
e3a1d391 1202
41524a58 1203 push @cmd, "--match multiport" if $multiport;
4b586518 1204
cbb5d6f3 1205 die "multiport: option '--sports' cannot be used together with '--dports'\n"
181390b0
DM
1206 if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1207
1208 if ($rule->{dport}) {
1209 if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1210 # Note: we use dport to store --icmp-type
1211 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
41524a58 1212 push @cmd, "-m icmp --icmp-type $rule->{dport}";
181390b0 1213 } else {
e5076eee 1214 if ($nbdport > 1) {
181390b0 1215 if ($multiport == 2) {
41524a58 1216 push @cmd, "--ports $rule->{dport}";
181390b0 1217 } else {
41524a58 1218 push @cmd, "--dports $rule->{dport}";
181390b0 1219 }
e3a1d391 1220 } else {
41524a58 1221 push @cmd, "--dport $rule->{dport}";
e3a1d391 1222 }
4b586518
DM
1223 }
1224 }
4b586518 1225
181390b0 1226 if ($rule->{sport}) {
e5076eee 1227 if ($nbsport > 1) {
41524a58 1228 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
181390b0 1229 } else {
41524a58 1230 push @cmd, "--sport $rule->{sport}";
181390b0 1231 }
4b586518 1232 }
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1233 } elsif ($rule->{dport} || $rule->{sport}) {
1234 warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
1235 warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
4b586518
DM
1236 }
1237
41524a58 1238 push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
4e6112f9
DM
1239
1240 if (my $action = $rule->{action}) {
cbb5d6f3 1241 $action = $actions->{$action} if defined($actions->{$action});
4e6112f9 1242 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
41524a58 1243 push @cmd, $goto ? "-g $action" : "-j $action";
181390b0 1244 }
3a616aa0 1245
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1246 return scalar(@cmd) ? join(' ', @cmd) : undef;
1247}
1248
1249sub ruleset_generate_rule {
ba791b1f 1250 my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
eba0fb64 1251
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1252 my $rules;
1253
1254 if ($rule->{macro}) {
1255 $rules = &$apply_macro($rule->{macro}, $rule);
1256 } else {
1257 $rules = [ $rule ];
1258 }
1259
cbb5d6f3 1260 foreach my $tmp (@$rules) {
ba791b1f 1261 if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
e5076eee
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1262 ruleset_addrule($ruleset, $chain, $cmdstr);
1263 }
41524a58 1264 }
3fa83edf 1265}
0f168d7b 1266
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1267sub ruleset_generate_rule_insert {
1268 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1269
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1270 die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1271
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1272 if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1273 ruleset_insertrule($ruleset, $chain, $cmdstr);
1274 }
1275}
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1276
1277sub ruleset_create_chain {
1278 my ($ruleset, $chain) = @_;
3a616aa0 1279
d050c724 1280 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
782c4cde 1281 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
d050c724 1282
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1283 die "chain '$chain' already exists\n" if $ruleset->{$chain};
1284
1285 $ruleset->{$chain} = [];
3a616aa0
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1286}
1287
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1288sub ruleset_chain_exist {
1289 my ($ruleset, $chain) = @_;
3a616aa0 1290
3fa83edf
DM
1291 return $ruleset->{$chain} ? 1 : undef;
1292}
3a616aa0 1293
3fa83edf
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1294sub ruleset_addrule {
1295 my ($ruleset, $chain, $rule) = @_;
3a616aa0 1296
3fa83edf 1297 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 1298
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1299 push @{$ruleset->{$chain}}, "-A $chain $rule";
1300}
3a616aa0 1301
3fa83edf
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1302sub ruleset_insertrule {
1303 my ($ruleset, $chain, $rule) = @_;
3a616aa0 1304
3fa83edf 1305 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 1306
3fa83edf
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1307 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1308}
3a616aa0 1309
782c4cde
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1310sub get_log_rule_base {
1311 my ($chain, $vmid, $msg, $loglevel) = @_;
cbb5d6f3 1312
782c4cde
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1313 die "internal error - no log level" if !defined($loglevel);
1314
1315 $vmid = 0 if !defined($vmid);
1316
cbb5d6f3 1317 # Note: we use special format for prefix to pass further
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1318 # info to log daemon (VMID, LOGVELEL and CHAIN)
1319
1320 return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1321}
1322
1323sub ruleset_addlog {
1324 my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1325
1326 return if !defined($loglevel);
1327
1328 my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1329
1330 $logrule = "$rule $logrule" if defined($rule);
1331
1332 ruleset_addrule($ruleset, $chain, $logrule)
1333}
1334
3fa83edf 1335sub generate_bridge_chains {
530c005e
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1336 my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_;
1337
1338 my $options = $hostfw_conf->{options} || {};
1339
1340 die "error: detected direct route to bridge '$bridge'\n"
1341 if !$options->{allow_bridge_route} && $routing_table->{$bridge};
2f3d8d76 1342
5927497d
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1343 if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
1344 ruleset_create_chain($ruleset, "$bridge-FW");
3cc81077
DM
1345 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-out -j $bridge-FW");
1346 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-in -j $bridge-FW");
3fa83edf 1347 }
3a616aa0 1348
3fa83edf
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1349 if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
1350 ruleset_create_chain($ruleset, "$bridge-OUT");
3cc81077
DM
1351 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-in -j $bridge-OUT");
1352 ruleset_insertrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-in -j $bridge-OUT");
9fcad984
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1353 }
1354
1355 if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
1356 ruleset_create_chain($ruleset, "$bridge-IN");
3cc81077 1357 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j $bridge-IN");
fdb0bf20 1358 ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
7323008d 1359 # accept traffic to unmanaged bridge ports
3cc81077 1360 ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j ACCEPT ");
3fa83edf
DM
1361 }
1362}
3a616aa0 1363
ead850e8 1364sub ruleset_add_chain_policy {
782c4cde 1365 my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
ead850e8
DM
1366
1367 if ($policy eq 'ACCEPT') {
1368
1369 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1370 { ACCEPT => $accept_action});
1371
1372 } elsif ($policy eq 'DROP') {
1373
1374 ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1375
782c4cde 1376 ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
ead850e8
DM
1377
1378 ruleset_addrule($ruleset, $chain, "-j DROP");
1379 } elsif ($policy eq 'REJECT') {
1380 ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1381
782c4cde 1382 ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
ead850e8
DM
1383
1384 ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1385 } else {
1386 # should not happen
1387 die "internal error: unknown policy '$policy'";
1388 }
1389}
1390
9e15114a
DM
1391sub ruleset_create_vm_chain {
1392 my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
3a616aa0 1393
9e15114a 1394 ruleset_create_chain($ruleset, $chain);
b47ecc88 1395 my $accept = generate_nfqueue($options);
3a616aa0 1396
bee633ab 1397 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
9e15114a 1398 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
bee633ab
DM
1399 }
1400
ce15d90b 1401 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
76a2d1e7 1402 if ($direction eq 'OUT') {
cbb5d6f3 1403 ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
0f168d7b 1404 proto => 'udp', sport => 68, dport => 67 });
76a2d1e7 1405 } else {
cbb5d6f3 1406 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
0f168d7b 1407 proto => 'udp', sport => 67, dport => 68 });
76a2d1e7 1408 }
ce15d90b
DM
1409 }
1410
bee633ab 1411 if ($options->{tcpflags}) {
9e15114a 1412 ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
bee633ab
DM
1413 }
1414
9e15114a 1415 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
cbb5d6f3 1416 if ($direction eq 'OUT') {
b47ecc88 1417 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -g PVEFW-SET-ACCEPT-MARK");
cbb5d6f3 1418 } else {
b47ecc88
AD
1419 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1420 }
cbb5d6f3 1421
b21aca2c
DM
1422 if ($direction eq 'OUT') {
1423 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
9e15114a 1424 ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
b21aca2c 1425 }
9e15114a 1426 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
c29f55c9 1427 }
9e15114a
DM
1428}
1429
1430sub ruleset_generate_vm_rules {
fca39c2c 1431 my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
9e15114a
DM
1432
1433 my $lc_direction = lc($direction);
c29f55c9 1434
92e976b3
DM
1435 foreach my $rule (@$rules) {
1436 next if $rule->{iface} && $rule->{iface} ne $netid;
ea9e5116 1437 next if !$rule->{enable};
92e976b3 1438 if ($rule->{type} eq 'group') {
cbb5d6f3 1439 my $group_chain = "GROUP-$rule->{action}-$direction";
92e976b3 1440 if(!ruleset_chain_exist($ruleset, $group_chain)){
fca39c2c 1441 generate_group_rules($ruleset, $cluster_conf, $rule->{action});
92e976b3 1442 }
9e15114a 1443 ruleset_addrule($ruleset, $chain, "-j $group_chain");
b47ecc88
AD
1444 if ($direction eq 'OUT'){
1445 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j RETURN");
1446 }else{
1447 my $accept = generate_nfqueue($options);
1448 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $accept");
1449 }
1450
92e976b3
DM
1451 } else {
1452 next if $rule->{type} ne $lc_direction;
1453 if ($direction eq 'OUT') {
cbb5d6f3 1454 ruleset_generate_rule($ruleset, $chain, $rule,
ba791b1f 1455 { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
4e6112f9 1456 } else {
b47ecc88 1457 my $accept = generate_nfqueue($options);
ba791b1f 1458 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept , REJECT => "PVEFW-reject" }, undef, $cluster_conf);
3a616aa0 1459 }
4e6112f9 1460 }
3a616aa0 1461 }
9e15114a
DM
1462}
1463
b47ecc88
AD
1464sub generate_nfqueue {
1465 my ($options) = @_;
1466
1467 my $action = "";
1468 if($options->{ips}){
1469 $action = "NFQUEUE";
1470 if($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1471 if(defined($3) && defined($1)) {
1472 $action .= " --queue-balance $1:$3";
1473 }elsif (defined($1)) {
1474 $action .= " --queue-num $1";
1475 }
1476 }
1477 $action .= " --queue-bypass";
1478 }else{
1479 $action = "ACCEPT";
1480 }
1481
1482 return $action;
1483}
1484
da6fc60b
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1485sub ruleset_generate_vm_ipsrules {
1486 my ($ruleset, $options, $direction, $iface, $bridge) = @_;
1487
1488 if ($options->{ips} && $direction eq 'IN') {
1489 my $nfqueue = generate_nfqueue($options);
1490
1491 if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1492 ruleset_create_chain($ruleset, "PVEFW-IPS");
1493 }
1494
1495 if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1496 ruleset_create_chain($ruleset, "$bridge-IPS");
1497 ruleset_insertrule($ruleset, "PVEFW-IPS", "-o $bridge -m physdev --physdev-is-out -j $bridge-IPS");
1498 }
1499
1500 ruleset_addrule($ruleset, "$bridge-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1501 }
1502}
1503
9e15114a 1504sub generate_venet_rules_direction {
fca39c2c 1505 my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
9e15114a 1506
5176619e 1507 parse_address_list($ip); # make sure we have a valid $ip list
9e15114a
DM
1508
1509 my $lc_direction = lc($direction);
1510
1511 my $rules = $vmfw_conf->{rules};
1512
1513 my $options = $vmfw_conf->{options};
1514 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1515
1516 my $chain = "venet0-$vmid-$direction";
1517
1518 ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1519
fca39c2c 1520 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
9e15114a
DM
1521
1522 # implement policy
1523 my $policy;
1524
1525 if ($direction eq 'OUT') {
1526 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1527 } else {
1528 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1529 }
1530
b47ecc88
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1531 my $accept = generate_nfqueue($options);
1532 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
782c4cde 1533 ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
9e15114a 1534
38485daa 1535 # plug into FORWARD, INPUT and OUTPUT chain
eba0fb64
DM
1536 if ($direction eq 'OUT') {
1537 ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD", {
1538 action => $chain,
1539 source => $ip,
1540 iface_in => 'venet0'});
38485daa
DM
1541
1542 ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT", {
1543 action => $chain,
1544 source => $ip,
1545 iface_in => 'venet0'});
eba0fb64
DM
1546 } else {
1547 ruleset_generate_rule($ruleset, "PVEFW-FORWARD", {
1548 action => $chain,
1549 dest => $ip,
1550 iface_out => 'venet0'});
38485daa
DM
1551
1552 ruleset_generate_rule($ruleset, "PVEFW-OUTPUT", {
1553 action => $chain,
1554 dest => $ip,
1555 iface_out => 'venet0'});
eba0fb64 1556 }
9e15114a
DM
1557}
1558
1559sub generate_tap_rules_direction {
fca39c2c 1560 my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_;
9e15114a
DM
1561
1562 my $lc_direction = lc($direction);
1563
1564 my $rules = $vmfw_conf->{rules};
1565
1566 my $options = $vmfw_conf->{options};
1567 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1568
1569 my $tapchain = "$iface-$direction";
1570
1571 ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1572
fca39c2c 1573 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
3a616aa0 1574
da6fc60b
AD
1575 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface, $bridge);
1576
ccae0b50
DM
1577 # implement policy
1578 my $policy;
1579
1580 if ($direction eq 'OUT') {
72f63fde 1581 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
ccae0b50 1582 } else {
72f63fde 1583 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
ccae0b50
DM
1584 }
1585
b47ecc88
AD
1586 my $accept = generate_nfqueue($options);
1587 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
782c4cde 1588 ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
3a616aa0 1589
3fa83edf 1590 # plug the tap chain to bridge chain
3cc81077
DM
1591 if ($direction eq 'IN') {
1592 ruleset_insertrule($ruleset, "$bridge-IN",
1593 "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1594 } else {
1595 ruleset_insertrule($ruleset, "$bridge-OUT",
1596 "-m physdev --physdev-in $iface -j $tapchain");
1597 }
3a616aa0
AD
1598}
1599
d18c1e2b 1600sub enable_host_firewall {
fca39c2c 1601 my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
0bd5f137 1602
51bae274 1603 # fixme: allow security groups
0bd5f137 1604
92e976b3
DM
1605 my $options = $hostfw_conf->{options};
1606 my $rules = $hostfw_conf->{rules};
178a63be 1607
3fa83edf 1608 # host inbound firewall
dec84fcd
DM
1609 my $chain = "PVEFW-HOST-IN";
1610 ruleset_create_chain($ruleset, $chain);
0bd5f137 1611
178a63be
DM
1612 my $loglevel = get_option_log_level($options, "log_level_in");
1613
4ac863a6
DM
1614 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1615 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1616 }
1617
fb424a00
DM
1618 if ($options->{tcpflags}) {
1619 ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1620 }
1621
7fab95bc
DM
1622 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1623 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
dec84fcd
DM
1624 ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1625 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
97156ecc 1626 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
dec84fcd 1627 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 1628
23e888f8
DM
1629 # we use RETURN because we need to check also tap rules
1630 my $accept_action = 'RETURN';
1631
92e976b3
DM
1632 foreach my $rule (@$rules) {
1633 next if $rule->{type} ne 'in';
ba791b1f 1634 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
0bd5f137
AD
1635 }
1636
23e888f8 1637 # implement input policy
72f63fde 1638 my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
782c4cde 1639 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
0bd5f137 1640
3fa83edf 1641 # host outbound firewall
aadd745e 1642 $chain = "PVEFW-HOST-OUT";
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DM
1643 ruleset_create_chain($ruleset, $chain);
1644
178a63be
DM
1645 $loglevel = get_option_log_level($options, "log_level_out");
1646
7fab95bc
DM
1647 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1648 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
dec84fcd
DM
1649 ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1650 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
97156ecc 1651 ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
dec84fcd 1652 ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
0bd5f137 1653
23e888f8
DM
1654 # we use RETURN because we may want to check other thigs later
1655 $accept_action = 'RETURN';
1656
92e976b3
DM
1657 foreach my $rule (@$rules) {
1658 next if $rule->{type} ne 'out';
ba791b1f 1659 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
0bd5f137
AD
1660 }
1661
23e888f8 1662 # implement output policy
72f63fde 1663 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
782c4cde 1664 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
6158271d 1665
dec84fcd
DM
1666 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1667 ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
9d31b418
AD
1668}
1669
1670sub generate_group_rules {
fca39c2c 1671 my ($ruleset, $cluster_conf, $group) = @_;
c6f5cc88 1672 die "no such security group '$group'\n" if !$cluster_conf->{groups}->{$group};
9d31b418 1673
c6f5cc88 1674 my $rules = $cluster_conf->{groups}->{$group};
6158271d 1675
3fa83edf 1676 my $chain = "GROUP-${group}-IN";
9d31b418 1677
3fa83edf 1678 ruleset_create_chain($ruleset, $chain);
b47ecc88 1679 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
9d31b418 1680
92e976b3
DM
1681 foreach my $rule (@$rules) {
1682 next if $rule->{type} ne 'in';
ba791b1f 1683 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
9d31b418
AD
1684 }
1685
3fa83edf 1686 $chain = "GROUP-${group}-OUT";
9d31b418 1687
3fa83edf 1688 ruleset_create_chain($ruleset, $chain);
4e6112f9 1689 ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
9d31b418 1690
92e976b3
DM
1691 foreach my $rule (@$rules) {
1692 next if $rule->{type} ne 'out';
1693 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1694 # check also other tap rules later
cbb5d6f3 1695 ruleset_generate_rule($ruleset, $chain, $rule,
ba791b1f 1696 { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
9d31b418 1697 }
9d31b418
AD
1698}
1699
51bae274
DM
1700my $MAX_NETS = 32;
1701my $valid_netdev_names = {};
1702for (my $i = 0; $i < $MAX_NETS; $i++) {
1703 $valid_netdev_names->{"net$i"} = 1;
1704}
5e1267a5 1705
51bae274
DM
1706sub parse_fw_rule {
1707 my ($line, $need_iface, $allow_groups) = @_;
5e1267a5 1708
92e976b3 1709 my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
51bae274 1710
11bac5c2 1711 # we can add single line comments to the end of the rule
30c1ae52 1712 my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
11bac5c2
DM
1713
1714 # we can disable a rule when prefixed with '|'
ea9e5116
DM
1715 my $enable = 1;
1716
1717 $enable = 0 if $line =~ s/^\|//;
51bae274
DM
1718
1719 my @data = split(/\s+/, $line);
92e976b3 1720 my $expected_elements = $need_iface ? 8 : 7;
51bae274
DM
1721
1722 die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1723
1724 if ($need_iface) {
92e976b3 1725 ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
51bae274 1726 } else {
92e976b3 1727 ($type, $action, $source, $dest, $proto, $dport, $sport) = @data;
51bae274
DM
1728 }
1729
92e976b3 1730 die "incomplete rule\n" if ! ($type && $action);
51bae274 1731
961b4928 1732 my $macro;
961b4928 1733
92e976b3
DM
1734 $type = lc($type);
1735
1736 if ($type eq 'in' || $type eq 'out') {
1737 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1738 # OK
1739 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
e5076eee
DM
1740 $action = $2;
1741 my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1742 die "unknown macro '$1'\n" if !$preferred_name;
1743 $macro = $preferred_name;
92e976b3
DM
1744 } else {
1745 die "unknown action '$action'\n";
1746 }
1747 } elsif ($type eq 'group') {
1748 die "wrong number of rule elements\n" if scalar(@data) != 3;
1749 die "groups disabled\n" if !$allow_groups;
1750
c14dacdf 1751 die "invalid characters in group name\n" if $action !~ m/^${security_group_pattern}$/;
51bae274 1752 } else {
92e976b3 1753 die "unknown rule type '$type'\n";
51bae274
DM
1754 }
1755
1756 if ($need_iface) {
1757 $iface = undef if $iface && $iface eq '-';
51bae274
DM
1758 }
1759
1760 $proto = undef if $proto && $proto eq '-';
54cd19a8 1761 pve_fw_verify_protocol_spec($proto) if $proto;
51bae274
DM
1762
1763 $source = undef if $source && $source eq '-';
1764 $dest = undef if $dest && $dest eq '-';
1765
1766 $dport = undef if $dport && $dport eq '-';
1767 $sport = undef if $sport && $sport eq '-';
1768
e5076eee
DM
1769 parse_port_name_number_or_range($dport) if defined($dport);
1770 parse_port_name_number_or_range($sport) if defined($sport);
ba791b1f 1771
d72beb8e
DM
1772 parse_address_list($source) if $source;
1773 parse_address_list($dest) if $dest;
51bae274 1774
e5076eee 1775 return {
92e976b3 1776 type => $type,
ea9e5116 1777 enable => $enable,
11bac5c2 1778 comment => $comment,
51bae274 1779 action => $action,
e5076eee 1780 macro => $macro,
51bae274
DM
1781 iface => $iface,
1782 source => $source,
1783 dest => $dest,
51bae274
DM
1784 proto => $proto,
1785 dport => $dport,
1786 sport => $sport,
51bae274
DM
1787 };
1788}
1789
2d404ffc 1790sub parse_vmfw_option {
85c6eaed
DM
1791 my ($line) = @_;
1792
1793 my ($opt, $value);
1794
178a63be
DM
1795 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1796
b47ecc88 1797 if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags|ips):\s*(0|1)\s*$/i) {
9c6b6efd
DM
1798 $opt = lc($1);
1799 $value = int($2);
178a63be
DM
1800 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1801 $opt = lc($1);
1802 $value = $2 ? lc($3) : '';
72f63fde 1803 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
85c6eaed
DM
1804 $opt = lc($1);
1805 $value = uc($3);
b47ecc88
AD
1806 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1807 $opt = lc($1);
1808 $value = $2;
9c6b6efd 1809 } else {
85c6eaed
DM
1810 chomp $line;
1811 die "can't parse option '$line'\n"
1812 }
1813
1814 return ($opt, $value);
1815}
1816
2d404ffc
DM
1817sub parse_hostfw_option {
1818 my ($line) = @_;
1819
1820 my ($opt, $value);
1821
1822 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1823
cc10e5d7 1824 if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags|allow_bridge_route|optimize):\s*(0|1)\s*$/i) {
2d404ffc
DM
1825 $opt = lc($1);
1826 $value = int($2);
178a63be 1827 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2d404ffc
DM
1828 $opt = lc($1);
1829 $value = $2 ? lc($3) : '';
72f63fde 1830 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2d404ffc
DM
1831 $opt = lc($1);
1832 $value = uc($3);
490cdead
DM
1833 } elsif ($line =~ m/^(nf_conntrack_max):\s*(\d+)\s*$/i) {
1834 $opt = lc($1);
1835 $value = int($2);
2d404ffc
DM
1836 } else {
1837 chomp $line;
1838 die "can't parse option '$line'\n"
1839 }
1840
1841 return ($opt, $value);
1842}
1843
c6f5cc88
DM
1844sub parse_clusterfw_option {
1845 my ($line) = @_;
1846
1847 my ($opt, $value);
1848
1849 if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1850 $opt = lc($1);
1851 $value = int($2);
1852 } else {
1853 chomp $line;
1854 die "can't parse option '$line'\n"
1855 }
1856
1857 return ($opt, $value);
1858}
1859
51bae274
DM
1860sub parse_vm_fw_rules {
1861 my ($filename, $fh) = @_;
1862
92e976b3 1863 my $res = { rules => [], options => {}};
51bae274
DM
1864
1865 my $section;
1866
e7b35711
DM
1867 my $digest = Digest::SHA->new('sha1');
1868
5e1267a5 1869 while (defined(my $line = <$fh>)) {
e7b35711
DM
1870 $digest->add($line);
1871
5e1267a5
DM
1872 next if $line =~ m/^#/;
1873 next if $line =~ m/^\s*$/;
1874
961b4928
DM
1875 my $linenr = $fh->input_line_number();
1876 my $prefix = "$filename (line $linenr)";
1877
85c6eaed 1878 if ($line =~ m/^\[(\S+)\]\s*$/i) {
5e1267a5 1879 $section = lc($1);
85c6eaed 1880 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
5e1267a5
DM
1881 next;
1882 }
51bae274 1883 if (!$section) {
961b4928 1884 warn "$prefix: skip line - no section";
5e1267a5
DM
1885 next;
1886 }
1887
85c6eaed
DM
1888 next if !$res->{$section}; # skip undefined section
1889
1890 if ($section eq 'options') {
6158271d 1891 eval {
2d404ffc 1892 my ($opt, $value) = parse_vmfw_option($line);
85c6eaed
DM
1893 $res->{options}->{$opt} = $value;
1894 };
1895 warn "$prefix: $@" if $@;
1896 next;
1897 }
1898
e5076eee
DM
1899 my $rule;
1900 eval { $rule = parse_fw_rule($line, 1, 1); };
51bae274 1901 if (my $err = $@) {
961b4928 1902 warn "$prefix: $err";
5e1267a5
DM
1903 next;
1904 }
1905
e5076eee 1906 push @{$res->{$section}}, $rule;
51bae274
DM
1907 }
1908
e7b35711
DM
1909 $res->{digest} = $digest->b64digest;
1910
51bae274
DM
1911 return $res;
1912}
1913
1914sub parse_host_fw_rules {
1915 my ($filename, $fh) = @_;
1916
92e976b3 1917 my $res = { rules => [], options => {}};
51bae274
DM
1918
1919 my $section;
1920
8b27beb9
DM
1921 my $digest = Digest::SHA->new('sha1');
1922
51bae274 1923 while (defined(my $line = <$fh>)) {
8b27beb9
DM
1924 $digest->add($line);
1925
51bae274
DM
1926 next if $line =~ m/^#/;
1927 next if $line =~ m/^\s*$/;
1928
961b4928
DM
1929 my $linenr = $fh->input_line_number();
1930 my $prefix = "$filename (line $linenr)";
1931
2d404ffc 1932 if ($line =~ m/^\[(\S+)\]\s*$/i) {
51bae274 1933 $section = lc($1);
2d404ffc 1934 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
5e1267a5
DM
1935 next;
1936 }
51bae274 1937 if (!$section) {
961b4928 1938 warn "$prefix: skip line - no section";
5e1267a5
DM
1939 next;
1940 }
1941
2d404ffc
DM
1942 next if !$res->{$section}; # skip undefined section
1943
1944 if ($section eq 'options') {
1945 eval {
2d404ffc
DM
1946 my ($opt, $value) = parse_hostfw_option($line);
1947 $res->{options}->{$opt} = $value;
1948 };
1949 warn "$prefix: $@" if $@;
1950 next;
1951 }
1952
e5076eee
DM
1953 my $rule;
1954 eval { $rule = parse_fw_rule($line, 1, 1); };
ecbea048 1955 if (my $err = $@) {
961b4928 1956 warn "$prefix: $err";
ecbea048 1957 next;
ecbea048 1958 }
cbb5d6f3 1959
e5076eee 1960 push @{$res->{$section}}, $rule;
51bae274 1961 }
ecbea048 1962
d72c631c 1963 $res->{digest} = $digest->b64digest;
8b27beb9 1964
51bae274
DM
1965 return $res;
1966}
4cdbb3b7 1967
c6f5cc88 1968sub parse_cluster_fw_rules {
51bae274 1969 my ($filename, $fh) = @_;
5e1267a5 1970
51bae274
DM
1971 my $section;
1972 my $group;
1973
0d22acb3
DM
1974 my $res = {
1975 rules => [],
1976 options => {},
1977 groups => {},
1978 group_comments => {},
d72c631c
DM
1979 ipset => {} ,
1980 ipset_comments => {},
0d22acb3 1981 };
6158271d 1982
d1c53b3e
DM
1983 my $digest = Digest::SHA->new('sha1');
1984
51bae274 1985 while (defined(my $line = <$fh>)) {
d1c53b3e
DM
1986 $digest->add($line);
1987
51bae274
DM
1988 next if $line =~ m/^#/;
1989 next if $line =~ m/^\s*$/;
1990
961b4928
DM
1991 my $linenr = $fh->input_line_number();
1992 my $prefix = "$filename (line $linenr)";
1993
c6f5cc88
DM
1994 if ($line =~ m/^\[options\]$/i) {
1995 $section = 'options';
1996 next;
1997 }
1998
0d22acb3 1999 if ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
c6f5cc88 2000 $section = 'groups';
92e976b3 2001 $group = lc($1);
0d22acb3 2002 my $comment = $2;
c85c87f9 2003 $res->{$section}->{$group} = [];
649e4d57
DM
2004 $res->{group_comments}->{$group} = decode('utf8', $comment)
2005 if $comment;
51bae274
DM
2006 next;
2007 }
34cdedfa 2008
c6f5cc88
DM
2009 if ($line =~ m/^\[rules\]$/i) {
2010 $section = 'rules';
2011 next;
2012 }
cbb5d6f3 2013
d72c631c 2014 if ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
34cdedfa
AD
2015 $section = 'ipset';
2016 $group = lc($1);
d72c631c 2017 my $comment = $2;
c85c87f9 2018 $res->{$section}->{$group} = [];
649e4d57
DM
2019 $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2020 if $comment;
34cdedfa
AD
2021 next;
2022 }
2023
c6f5cc88 2024 if (!$section) {
cbb5d6f3 2025 warn "$prefix: skip line - no section\n";
51bae274
DM
2026 next;
2027 }
2028
c6f5cc88
DM
2029 if ($section eq 'options') {
2030 eval {
2031 my ($opt, $value) = parse_clusterfw_option($line);
2032 $res->{options}->{$opt} = $value;
2033 };
2034 warn "$prefix: $@" if $@;
2035 } elsif ($section eq 'rules') {
2036 my $rule;
2037 eval { $rule = parse_fw_rule($line, 1, 1); };
2038 if (my $err = $@) {
2039 warn "$prefix: $err";
2040 next;
2041 }
2042 push @{$res->{$section}}, $rule;
2043 } elsif ($section eq 'groups') {
34cdedfa
AD
2044 my $rule;
2045 eval { $rule = parse_fw_rule($line, 0, 0); };
2046 if (my $err = $@) {
2047 warn "$prefix: $err";
2048 next;
2049 }
3f95d14a 2050 push @{$res->{$section}->{$group}}, $rule;
3f95d14a 2051 } elsif ($section eq 'ipset') {
9d6f90e6
DM
2052 # we can add single line comments to the end of the rule
2053 my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2054
30f1b100 2055 $line =~ m/^(\!)?\s*(\S+)\s*$/;
2a052ee3 2056 my $nomatch = $1;
9d6f90e6 2057 my $cidr = $2;
2a052ee3 2058
30f1b100
DM
2059 $cidr =~ s|/32$||;
2060
2061 eval { pve_verify_ipv4_or_cidr($cidr); };
2062 if (my $err = $@) {
2063 warn "$prefix: $cidr - $err";
2a052ee3
AD
2064 next;
2065 }
2a052ee3 2066
9d6f90e6
DM
2067 my $entry = { cidr => $cidr };
2068 $entry->{nomatch} = 1 if $nomatch;
2069 $entry->{comment} = $comment if $comment;
2070
2071 push @{$res->{$section}->{$group}}, $entry;
51bae274 2072 }
5e1267a5
DM
2073 }
2074
d1c53b3e 2075 $res->{digest} = $digest->b64digest;
5e1267a5
DM
2076 return $res;
2077}
2078
06320eb0
DM
2079sub run_locked {
2080 my ($code, @param) = @_;
2081
2082 my $timeout = 10;
2083
2084 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2085
2086 die $@ if $@;
2087
2088 return $res;
2089}
2090
5e1267a5
DM
2091sub read_local_vm_config {
2092
2093 my $openvz = {};
5e1267a5
DM
2094 my $qemu = {};
2095
c8301d63 2096 my $vmdata = { openvz => $openvz, qemu => $qemu };
5e1267a5 2097
c8301d63
DM
2098 my $vmlist = PVE::Cluster::get_vmlist();
2099 return $vmdata if !$vmlist || !$vmlist->{ids};
2100 my $ids = $vmlist->{ids};
2101
2102 foreach my $vmid (keys %$ids) {
2103 next if !$vmid; # skip VE0
2104 my $d = $ids->{$vmid};
2105 next if !$d->{node} || $d->{node} ne $nodename;
2106 next if !$d->{type};
2107 if ($d->{type} eq 'openvz') {
d9fee004
DM
2108 if ($have_pve_manager) {
2109 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2110 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2111 $openvz->{$vmid} = $conf;
2112 }
c8301d63
DM
2113 }
2114 } elsif ($d->{type} eq 'qemu') {
d9fee004
DM
2115 if ($have_qemu_server) {
2116 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2117 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2118 $qemu->{$vmid} = $conf;
2119 }
c8301d63 2120 }
5e1267a5
DM
2121 }
2122 }
d9fee004 2123
5e1267a5
DM
2124 return $vmdata;
2125};
2126
e7b35711
DM
2127sub load_vmfw_conf {
2128 my ($vmid) = @_;
2129
2130 my $vmfw_conf = {};
2131
2132 my $filename = "/etc/pve/firewall/$vmid.fw";
2133 if (my $fh = IO::File->new($filename, O_RDONLY)) {
2134 $vmfw_conf = parse_vm_fw_rules($filename, $fh);
2135 }
2136
2137 return $vmfw_conf;
2138}
2139
464f933e
DM
2140my $format_rules = sub {
2141 my ($rules, $need_iface) = @_;
2142
2143 my $raw = '';
2144
2145 foreach my $rule (@$rules) {
c14dacdf 2146 if ($rule->{type} eq 'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
464f933e
DM
2147 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2148 $raw .= uc($rule->{type});
7ca36671
DM
2149 if ($rule->{macro}) {
2150 $raw .= " $rule->{macro}($rule->{action})";
2151 } else {
2152 $raw .= " " . $rule->{action};
2153 }
464f933e 2154 $raw .= " " . ($rule->{iface} || '-') if $need_iface;
c14dacdf
DM
2155
2156 if ($rule->{type} ne 'group') {
2157 $raw .= " " . ($rule->{source} || '-');
2158 $raw .= " " . ($rule->{dest} || '-');
2159 $raw .= " " . ($rule->{proto} || '-');
2160 $raw .= " " . ($rule->{dport} || '-');
2161 $raw .= " " . ($rule->{sport} || '-');
2162 }
2163
cbb5d6f3 2164 $raw .= " # " . encode('utf8', $rule->{comment})
464f933e
DM
2165 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2166 $raw .= "\n";
2167 } else {
c14dacdf 2168 die "unknown rule type '$rule->{type}'";
464f933e
DM
2169 }
2170 }
2171
2172 return $raw;
2173};
2174
2175my $format_options = sub {
68c90e21
DM
2176 my ($options) = @_;
2177
2178 my $raw = '';
464f933e
DM
2179
2180 $raw .= "[OPTIONS]\n\n";
2181 foreach my $opt (keys %$options) {
2182 $raw .= "$opt: $options->{$opt}\n";
2183 }
2184 $raw .= "\n";
68c90e21
DM
2185
2186 return $raw;
464f933e
DM
2187};
2188
9d6f90e6
DM
2189my $format_ipset = sub {
2190 my ($options) = @_;
2191
2192 my $raw = '';
2193
6e299ae3 2194 my $nethash = {};
9d6f90e6 2195 foreach my $entry (@$options) {
6e299ae3
DM
2196 $nethash->{$entry->{cidr}} = $entry;
2197 }
2198
2199 foreach my $cidr (sort keys %$nethash) {
2200 my $entry = $nethash->{$cidr};
9d6f90e6
DM
2201 my $line = $entry->{nomatch} ? '!' : '';
2202 $line .= $entry->{cidr};
2203 $line .= " # " . encode('utf8', $entry->{comment})
2204 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2205 $raw .= "$line\n";
2206 }
2207
2208 return $raw;
2209};
2210
464f933e
DM
2211sub save_vmfw_conf {
2212 my ($vmid, $vmfw_conf) = @_;
2213
2214 my $raw = '';
2215
2216 my $options = $vmfw_conf->{options};
68c90e21 2217 $raw .= &$format_options($options) if scalar(keys %$options);
cbb5d6f3 2218
464f933e
DM
2219 my $rules = $vmfw_conf->{rules};
2220 if (scalar(@$rules)) {
2221 $raw .= "[RULES]\n\n";
2222 $raw .= &$format_rules($rules, 1);
2223 $raw .= "\n";
2224 }
2225
2226 my $filename = "/etc/pve/firewall/$vmid.fw";
2227 PVE::Tools::file_set_contents($filename, $raw);
2228}
2229
6fc63ffd 2230sub read_vm_firewall_configs {
5e1267a5 2231 my ($vmdata) = @_;
6fc63ffd 2232 my $vmfw_configs = {};
c8301d63 2233
5e1267a5 2234 foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
e7b35711
DM
2235 my $vmfw_conf = load_vmfw_conf($vmid);
2236 next if !$vmfw_conf->{options}; # skip if file does not exists
2237 $vmfw_configs->{$vmid} = $vmfw_conf;
5e1267a5
DM
2238 }
2239
6fc63ffd 2240 return $vmfw_configs;
5e1267a5
DM
2241}
2242
2d404ffc
DM
2243sub get_option_log_level {
2244 my ($options, $k) = @_;
2245
2246 my $v = $options->{$k};
178a63be 2247 $v = $default_log_level if !defined($v);
2d404ffc
DM
2248
2249 return undef if $v eq '' || $v eq 'nolog';
2250
2251 $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2252
2253 return $v if ($v >= 0) && ($v <= 7);
2254
2255 warn "unknown log level ($k = '$v')\n";
2256
2257 return undef;
2258}
2259
d8f2505e 2260sub generate_std_chains {
2d404ffc 2261 my ($ruleset, $options) = @_;
cbb5d6f3 2262
2d404ffc
DM
2263 my $loglevel = get_option_log_level($options, 'smurf_log_level');
2264
2265 # same as shorewall smurflog.
782c4cde
DM
2266 my $chain = 'PVEFW-smurflog';
2267
2268 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2269 push @{$pve_std_chains->{$chain}}, "-j DROP";
2d404ffc
DM
2270
2271 # same as shorewall logflags action.
2272 $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
782c4cde
DM
2273 $chain = 'PVEFW-logflags';
2274 # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2275 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2276 push @{$pve_std_chains->{$chain}}, "-j DROP";
d8f2505e
DM
2277
2278 foreach my $chain (keys %$pve_std_chains) {
2279 ruleset_create_chain($ruleset, $chain);
2280 foreach my $rule (@{$pve_std_chains->{$chain}}) {
2281 if (ref($rule)) {
2282 ruleset_generate_rule($ruleset, $chain, $rule);
2283 } else {
2284 ruleset_addrule($ruleset, $chain, $rule);
2285 }
2286 }
2287 }
2288}
2289
34cdedfa 2290sub generate_ipset_chains {
dd7a13fd 2291 my ($ipset_ruleset, $fw_conf) = @_;
34cdedfa 2292
dd7a13fd 2293 foreach my $ipset (keys %{$fw_conf->{ipset}}) {
4b96e877 2294 generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset});
34cdedfa
AD
2295 }
2296}
2297
2298sub generate_ipset {
2299 my ($ipset_ruleset, $name, $options) = @_;
2300
dd7a13fd
DM
2301 my $hashsize = scalar(@$options);
2302 if ($hashsize <= 64) {
2a052ee3 2303 $hashsize = 64;
dd7a13fd 2304 } else {
2a052ee3
AD
2305 $hashsize = round_powerof2($hashsize);
2306 }
2307
dd7a13fd 2308 push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
34cdedfa 2309
30f1b100
DM
2310 # remove duplicates
2311 my $nethash = {};
9d6f90e6 2312 foreach my $entry (@$options) {
30f1b100
DM
2313 $nethash->{$entry->{cidr}} = $entry;
2314 }
2315
2316 foreach my $cidr (sort keys %$nethash) {
2317 my $entry = $nethash->{$cidr};
2318
9d6f90e6
DM
2319 my $cmd = "add $name $cidr";
2320 if ($entry->{nomatch}) {
2321 if ($feature_ipset_nomatch) {
2322 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2323 } else {
2324 warn "ignore !$cidr - nomatch not supported by kernel\n";
2325 }
2326 } else {
2327 push @{$ipset_ruleset->{$name}}, $cmd;
2328 }
34cdedfa 2329 }
2a052ee3
AD
2330}
2331
2332sub round_powerof2 {
dd7a13fd 2333 my ($int) = @_;
2a052ee3 2334
dd7a13fd
DM
2335 $int--;
2336 $int |= $int >> $_ foreach (1,2,4,8,16);
2337 return ++$int;
34cdedfa
AD
2338}
2339
6b9f68a2
DM
2340sub save_pvefw_status {
2341 my ($status) = @_;
2342
2343 die "unknown status '$status' - internal error"
2344 if $status !~ m/^(stopped|active)$/;
2345
2346 mkdir dirname($pve_fw_status_filename);
2347 PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
2348}
2349
2350sub read_pvefw_status {
2351
2352 my $status = 'unknown';
2353
2354 return 'stopped' if ! -f $pve_fw_status_filename;
2355
2356 eval {
2357 $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
2358 };
2359 warn $@ if $@;
2360
2361 return $status;
2362}
2363
530c005e
DM
2364# fixme: move to pve-common PVE::ProcFSTools
2365sub read_proc_net_route {
2366 my $filename = "/proc/net/route";
2367
2368 my $res = {};
2369
2370 my $fh = IO::File->new ($filename, "r");
2371 return $res if !$fh;
2372
2373 my $int_to_quad = sub {
2374 return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
2375 };
2376
2377 while (defined(my $line = <$fh>)) {
2378 next if $line =~/^Iface\s+Destination/; # skip head
2379 my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
2380 push @{$res->{$iface}}, {
2381 dest => &$int_to_quad(hex($dest)),
2382 gateway => &$int_to_quad(hex($gateway)),
2383 mask => &$int_to_quad(hex($mask)),
2384 metric => $metric,
2385 mtu => $mtu,
2386 };
2387 }
2388
2389 return $res;
2390}
2391
fca39c2c 2392sub load_clusterfw_conf {
530c005e 2393
fca39c2c
DM
2394 my $cluster_conf = {};
2395 if (my $fh = IO::File->new($clusterfw_conf_filename, O_RDONLY)) {
c6f5cc88 2396 $cluster_conf = parse_cluster_fw_rules($clusterfw_conf_filename, $fh);
51bae274 2397 }
5e1267a5 2398
fca39c2c 2399 return $cluster_conf;
e5d76bde
DM
2400}
2401
fca39c2c
DM
2402sub save_clusterfw_conf {
2403 my ($cluster_conf) = @_;
9c7e0858
DM
2404
2405 my $raw = '';
9c7e0858 2406
c6f5cc88 2407 my $options = $cluster_conf->{options};
68c90e21 2408 $raw .= &$format_options($options) if scalar(keys %$options);
9c7e0858 2409
9d6f90e6 2410 foreach my $ipset (sort keys %{$cluster_conf->{ipset}}) {
d72c631c 2411 if (my $comment = $cluster_conf->{ipset_comments}->{$ipset}) {
649e4d57
DM
2412 my $utf8comment = encode('utf8', $comment);
2413 $raw .= "[IPSET $ipset] # $utf8comment\n\n";
d72c631c
DM
2414 } else {
2415 $raw .= "[IPSET $ipset]\n\n";
2416 }
9d6f90e6
DM
2417 my $options = $cluster_conf->{ipset}->{$ipset};
2418 $raw .= &$format_ipset($options);
2419 $raw .= "\n";
2420 }
c6f5cc88
DM
2421
2422 my $rules = $cluster_conf->{rules};
2423 if (scalar(@$rules)) {
2424 $raw .= "[RULES]\n\n";
63c91681 2425 $raw .= &$format_rules($rules, 1);
c6f5cc88
DM
2426 $raw .= "\n";
2427 }
2428
2429 foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2430 my $rules = $cluster_conf->{groups}->{$group};
0d22acb3 2431 if (my $comment = $cluster_conf->{group_comments}->{$group}) {
649e4d57
DM
2432 my $utf8comment = encode('utf8', $comment);
2433 $raw .= "[group $group] # $utf8comment\n\n";
0d22acb3
DM
2434 } else {
2435 $raw .= "[group $group]\n\n";
2436 }
2437
63c91681 2438 $raw .= &$format_rules($rules, 0);
9c7e0858
DM
2439 $raw .= "\n";
2440 }
2441
fca39c2c 2442 PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
9c7e0858
DM
2443}
2444
8b27beb9
DM
2445sub load_hostfw_conf {
2446
2447 my $hostfw_conf = {};
63c91681
DM
2448 if (my $fh = IO::File->new($hostfw_conf_filename, O_RDONLY)) {
2449 $hostfw_conf = parse_host_fw_rules($hostfw_conf_filename, $fh);
8b27beb9
DM
2450 }
2451 return $hostfw_conf;
2452}
2453
63c91681
DM
2454sub save_hostfw_conf {
2455 my ($hostfw_conf) = @_;
2456
2457 my $raw = '';
2458
2459 my $options = $hostfw_conf->{options};
68c90e21 2460 $raw .= &$format_options($options) if scalar(keys %$options);
cbb5d6f3 2461
63c91681
DM
2462 my $rules = $hostfw_conf->{rules};
2463 if (scalar(@$rules)) {
2464 $raw .= "[RULES]\n\n";
2465 $raw .= &$format_rules($rules, 1);
2466 $raw .= "\n";
2467 }
2468
2469 PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2470}
2471
e5d76bde
DM
2472sub compile {
2473 my $vmdata = read_local_vm_config();
2474 my $vmfw_configs = read_vm_firewall_configs($vmdata);
2475
2476 my $routing_table = read_proc_net_route();
2477
fca39c2c 2478 my $cluster_conf = load_clusterfw_conf();
e5d76bde 2479
34cdedfa 2480 my $ipset_ruleset = {};
fca39c2c 2481 generate_ipset_chains($ipset_ruleset, $cluster_conf);
34cdedfa 2482
3fa83edf
DM
2483 my $ruleset = {};
2484
dec84fcd
DM
2485 ruleset_create_chain($ruleset, "PVEFW-INPUT");
2486 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
5b1df9a0 2487
fadb13dd 2488 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3fa83edf 2489
8b27beb9
DM
2490 my $hostfw_conf = load_hostfw_conf();
2491 my $hostfw_options = $hostfw_conf->{options} || {};
fadb13dd 2492
92e976b3 2493 generate_std_chains($ruleset, $hostfw_options);
fadb13dd 2494
6d2ab017 2495 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2d404ffc 2496
fca39c2c 2497 enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
3fa83edf 2498
6158271d 2499 # generate firewall rules for QEMU VMs
3fa83edf
DM
2500 foreach my $vmid (keys %{$vmdata->{qemu}}) {
2501 my $conf = $vmdata->{qemu}->{$vmid};
6fc63ffd 2502 my $vmfw_conf = $vmfw_configs->{$vmid};
fa9c4a6f
DM
2503 next if !$vmfw_conf;
2504 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
3fa83edf
DM
2505
2506 foreach my $netid (keys %$conf) {
2507 next if $netid !~ m/^net(\d+)$/;
2508 my $net = PVE::QemuServer::parse_net($conf->{$netid});
2509 next if !$net;
2510 my $iface = "tap${vmid}i$1";
5e1267a5 2511
3fa83edf
DM
2512 my $bridge = $net->{bridge};
2513 next if !$bridge; # fixme: ?
2514
2515 $bridge .= "v$net->{tag}" if $net->{tag};
2516
530c005e 2517 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
3fa83edf 2518
c29f55c9 2519 my $macaddr = $net->{macaddr};
cbb5d6f3 2520 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
782c4cde 2521 $vmfw_conf, $vmid, $bridge, 'IN');
cbb5d6f3 2522 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
782c4cde 2523 $vmfw_conf, $vmid, $bridge, 'OUT');
3fa83edf
DM
2524 }
2525 }
c8301d63
DM
2526
2527 # generate firewall rules for OpenVZ containers
2528 foreach my $vmid (keys %{$vmdata->{openvz}}) {
2529 my $conf = $vmdata->{openvz}->{$vmid};
2530
2531 my $vmfw_conf = $vmfw_configs->{$vmid};
2532 next if !$vmfw_conf;
2533 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2534
2535 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2536 my $ip = $conf->{ip_address}->{value};
fca39c2c
DM
2537 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2538 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
c8301d63
DM
2539 }
2540
2541 if ($conf->{netif} && $conf->{netif}->{value}) {
2542 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
c8301d63
DM
2543 foreach my $netid (keys %$netif) {
2544 my $d = $netif->{$netid};
2545 my $bridge = $d->{bridge};
2546 if (!$bridge) {
2547 warn "no bridge device for CT $vmid iface '$netid'\n";
2548 next; # fixme?
2549 }
cbb5d6f3 2550
530c005e
DM
2551 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2552
12d0f130 2553 my $macaddr = $d->{mac};
c8301d63 2554 my $iface = $d->{host_ifname};
cbb5d6f3 2555 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
782c4cde 2556 $vmfw_conf, $vmid, $bridge, 'IN');
cbb5d6f3 2557 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
782c4cde 2558 $vmfw_conf, $vmid, $bridge, 'OUT');
c8301d63
DM
2559 }
2560 }
2561 }
c0413e35 2562
cc10e5d7 2563 if($hostfw_options->{optimize}){
da6fc60b 2564
e9d9a73e 2565 my $accept = ruleset_chain_exist($ruleset, "PVEFW-IPS") ? "PVEFW-IPS" : "ACCEPT";
da6fc60b 2566 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
cc10e5d7
AD
2567 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate INVALID -j DROP");
2568 }
2569
eba0fb64
DM
2570 # fixme: what log level should we use here?
2571 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2572
c98c037d
DM
2573 # fixme: should we really block inter-bridge traffic?
2574
2575 # always allow traffic from containers?
2576 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN");
2577
eba0fb64 2578 # disable interbridge routing
cbb5d6f3 2579 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop");
eba0fb64 2580 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop");
cbb5d6f3
DM
2581 ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-o vmbr+");
2582 ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-i vmbr+");
2583 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP");
eba0fb64
DM
2584 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP");
2585
34cdedfa 2586 return wantarray ? ($ruleset, $hostfw_conf, $ipset_ruleset) : $ruleset;
3fa83edf
DM
2587}
2588
2589sub get_ruleset_status {
4bd0a9c4 2590 my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3fa83edf
DM
2591
2592 my $statushash = {};
2593
2594 foreach my $chain (sort keys %$ruleset) {
4bd0a9c4 2595 my $sig = &$digest_fn($ruleset->{$chain});
9bf7d929 2596
3fa83edf
DM
2597 $statushash->{$chain}->{sig} = $sig;
2598
2599 my $oldsig = $active_chains->{$chain};
2600 if (!defined($oldsig)) {
2601 $statushash->{$chain}->{action} = 'create';
2602 } else {
2603 if ($oldsig eq $sig) {
2604 $statushash->{$chain}->{action} = 'exists';
2605 } else {
2606 $statushash->{$chain}->{action} = 'update';
2607 }
2608 }
2609 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2610 foreach my $cmd (@{$ruleset->{$chain}}) {
2611 print "\t$cmd\n" if $verbose;
2612 }
2613 }
2614
2615 foreach my $chain (sort keys %$active_chains) {
2616 if (!defined($ruleset->{$chain})) {
2617 my $sig = $active_chains->{$chain};
2618 $statushash->{$chain}->{action} = 'delete';
2619 $statushash->{$chain}->{sig} = $sig;
2620 print "delete $chain ($sig)\n" if $verbose;
2621 }
6158271d 2622 }
2a052ee3 2623
3fa83edf
DM
2624 return $statushash;
2625}
2626
3fa83edf
DM
2627sub print_sig_rule {
2628 my ($chain, $sig) = @_;
2629
09d5f68e
DM
2630 # We just use this to store a SHA1 checksum used to detect changes
2631 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
b6360c3f
DM
2632}
2633
df7cb349 2634sub get_ruleset_cmdlist {
a84f4d96 2635 my ($ruleset, $verbose) = @_;
3fa83edf 2636
3fa83edf 2637 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
cbb5d6f3 2638
4bd0a9c4
DM
2639 my ($active_chains, $hooks) = iptables_get_chains();
2640 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3fa83edf
DM
2641
2642 # create missing chains first
2643 foreach my $chain (sort keys %$ruleset) {
2644 my $stat = $statushash->{$chain};
2645 die "internal error" if !$stat;
2646 next if $stat->{action} ne 'create';
886aba9c 2647
3fa83edf
DM
2648 $cmdlist .= ":$chain - [0:0]\n";
2649 }
2650
4bd0a9c4
DM
2651 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2652 if (!$hooks->{$h}) {
2653 $cmdlist .= "-A $h -j PVEFW-$h\n";
2654 }
3fa83edf
DM
2655 }
2656
2657 foreach my $chain (sort keys %$ruleset) {
2658 my $stat = $statushash->{$chain};
2659 die "internal error" if !$stat;
2660
2661 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2662 $cmdlist .= "-F $chain\n";
2663 foreach my $cmd (@{$ruleset->{$chain}}) {
2664 $cmdlist .= "$cmd\n";
2665 }
2666 $cmdlist .= print_sig_rule($chain, $stat->{sig});
2667 } elsif ($stat->{action} eq 'delete') {
f5d28682 2668 die "internal error"; # this should not happen
3fa83edf
DM
2669 } elsif ($stat->{action} eq 'exists') {
2670 # do nothing
2671 } else {
2672 die "internal error - unknown status '$stat->{action}'";
2673 }
2674 }
2675
f5d28682
DM
2676 foreach my $chain (keys %$statushash) {
2677 next if $statushash->{$chain}->{action} ne 'delete';
2678 $cmdlist .= "-F $chain\n";
2679 }
2680 foreach my $chain (keys %$statushash) {
2681 next if $statushash->{$chain}->{action} ne 'delete';
fadb13dd
DM
2682 next if $chain eq 'PVEFW-INPUT';
2683 next if $chain eq 'PVEFW-OUTPUT';
2684 next if $chain eq 'PVEFW-FORWARD';
f5d28682
DM
2685 $cmdlist .= "-X $chain\n";
2686 }
2687
3f95d14a 2688 my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
4bd0a9c4 2689
3fa83edf
DM
2690 $cmdlist .= "COMMIT\n";
2691
3f95d14a 2692 return wantarray ? ($cmdlist, $changes) : $cmdlist;
6b9f68a2
DM
2693}
2694
34cdedfa 2695sub get_ipset_cmdlist {
dd7a13fd 2696 my ($ruleset, $verbose) = @_;
34cdedfa
AD
2697
2698 my $cmdlist = "";
2699
dd7a13fd
DM
2700 my $delete_cmdlist = "";
2701
4bd0a9c4
DM
2702 my $active_chains = ipset_get_chains();
2703 my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
34cdedfa 2704
30f1b100
DM
2705 # remove stale _swap chains
2706 foreach my $chain (keys %$active_chains) {
2707 if ($chain =~ m/^PVEFW-\S+_swap$/) {
2708 $cmdlist .= "destroy $chain\n";
2709 }
2710 }
2711
dd7a13fd
DM
2712 foreach my $chain (sort keys %$ruleset) {
2713 my $stat = $statushash->{$chain};
2714 die "internal error" if !$stat;
2a052ee3 2715
dd7a13fd
DM
2716 if ($stat->{action} eq 'create') {
2717 foreach my $cmd (@{$ruleset->{$chain}}) {
34cdedfa
AD
2718 $cmdlist .= "$cmd\n";
2719 }
dd7a13fd 2720 }
34cdedfa 2721
dd7a13fd
DM
2722 if ($stat->{action} eq 'update') {
2723 my $chain_swap = $chain."_swap";
cbb5d6f3 2724
dd7a13fd
DM
2725 foreach my $cmd (@{$ruleset->{$chain}}) {
2726 $cmd =~ s/$chain/$chain_swap/;
2727 $cmdlist .= "$cmd\n";
34cdedfa 2728 }
dd7a13fd
DM
2729 $cmdlist .= "swap $chain_swap $chain\n";
2730 $cmdlist .= "flush $chain_swap\n";
2731 $cmdlist .= "destroy $chain_swap\n";
2a052ee3 2732 }
34cdedfa 2733
dd7a13fd 2734 }
3f95d14a 2735
dd7a13fd
DM
2736 foreach my $chain (keys %$statushash) {
2737 next if $statushash->{$chain}->{action} ne 'delete';
2a052ee3 2738
dd7a13fd
DM
2739 $delete_cmdlist .= "flush $chain\n";
2740 $delete_cmdlist .= "destroy $chain\n";
34cdedfa
AD
2741 }
2742
dd7a13fd 2743 my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
cbb5d6f3 2744
dd7a13fd 2745 return ($cmdlist, $delete_cmdlist, $changes);
34cdedfa
AD
2746}
2747
6b9f68a2 2748sub apply_ruleset {
34cdedfa 2749 my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
6b9f68a2
DM
2750
2751 enable_bridge_firewall();
2752
edb75ba9
DM
2753 update_nf_conntrack_max($hostfw_conf);
2754
cbb5d6f3 2755 my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
81a0bf43 2756 get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
6b9f68a2 2757
81a0bf43 2758 my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
2a052ee3 2759
81a0bf43
DM
2760 if ($verbose) {
2761 if ($ipset_changes) {
2762 print "ipset changes:\n";
2763 print $ipset_create_cmdlist if $ipset_create_cmdlist;
2764 print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2765 }
3f95d14a 2766
81a0bf43
DM
2767 if ($changes) {
2768 print "iptables changes:\n";
2769 print $cmdlist;
2770 }
2771 }
3fa83edf 2772
2a052ee3 2773 ipset_restore_cmdlist($ipset_create_cmdlist);
34cdedfa 2774
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DM
2775 iptables_restore_cmdlist($cmdlist);
2776
dd7a13fd 2777 ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2a052ee3 2778
6158271d 2779 # test: re-read status and check if everything is up to date
4bd0a9c4 2780 my $active_chains = iptables_get_chains();
81a0bf43 2781 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
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DM
2782
2783 my $errors;
2784 foreach my $chain (sort keys %$ruleset) {
2785 my $stat = $statushash->{$chain};
2786 if ($stat->{action} ne 'exists') {
2787 warn "unable to update chain '$chain'\n";
2788 $errors = 1;
2789 }
2790 }
b6360c3f 2791
3fa83edf 2792 die "unable to apply firewall changes\n" if $errors;
b6360c3f
DM
2793}
2794
490cdead
DM
2795sub update_nf_conntrack_max {
2796 my ($hostfw_conf) = @_;
2797
2798 my $max = 65536; # reasonable default
2799
2800 my $options = $hostfw_conf->{options} || {};
2801
2802 if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2803 $max = $options->{nf_conntrack_max};
2804 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2805 }
2806
2807 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2808 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2809
2810 my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
2811
2812 if ($current != $max) {
2813 my $hashsize = int($max/4);
2814 PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
2815 PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
2816 }
2817}
2818
c4a2e5ae
DM
2819sub remove_pvefw_chains {
2820
2821 my ($chash, $hooks) = iptables_get_chains();
2822 my $cmdlist = "*filter\n";
2823
2824 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2825 if ($hooks->{$h}) {
2826 $cmdlist .= "-D $h -j PVEFW-$h\n";
2827 }
2828 }
cbb5d6f3 2829
c4a2e5ae
DM
2830 foreach my $chain (keys %$chash) {
2831 $cmdlist .= "-F $chain\n";
2832 }
2833
2834 foreach my $chain (keys %$chash) {
2835 $cmdlist .= "-X $chain\n";
2836 }
2837 $cmdlist .= "COMMIT\n";
2838
2839 iptables_restore_cmdlist($cmdlist);
2840}
2841
6b9f68a2
DM
2842sub update {
2843 my ($start, $verbose) = @_;
2844
2845 my $code = sub {
2846 my $status = read_pvefw_status();
2847
3f95d14a 2848 my ($ruleset, $hostfw_conf, $ipset_ruleset) = compile();
490cdead 2849
6b9f68a2
DM
2850 if ($start || $status eq 'active') {
2851
2852 save_pvefw_status('active') if ($status ne 'active');
2853
34cdedfa 2854 apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
6b9f68a2
DM
2855 } else {
2856 print "Firewall not active (status = $status)\n" if $verbose;
2857 }
2858 };
2859
2860 run_locked($code);
2861}
2862
2863
b6360c3f 28641;