9 use PVE
::Exception
qw(raise raise_param_exc);
10 use PVE
::JSONSchema
qw(get_standard_option);
18 use PVE
::Tools
qw(run_command lock_file);
21 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
22 my $clusterfw_conf_filename = "/etc/pve/firewall/cluster.fw";
24 # dynamically include PVE::QemuServer and PVE::OpenVZ
25 # to avoid dependency problems
28 require PVE
::QemuServer
;
29 $have_qemu_server = 1;
35 $have_pve_manager = 1;
38 my $feature_ipset_nomatch = 0;
40 my (undef, undef, $release) = POSIX
::uname
();
41 if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
42 my ($major, $minor) = ($1, $2);
43 $feature_ipset_nomatch = 1 if ($major > 3) ||
44 ($major == 3 && $minor >= 7);
51 my $nodename = PVE
::INotify
::nodename
();
53 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
54 my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
56 my $default_log_level = 'info';
58 my $log_level_hash = {
69 # imported/converted from: /usr/share/shorewall/macro.*
73 { action
=> 'PARAM', proto
=> 'udp', dport
=> '10080' },
74 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10080' },
77 "Auth (identd) traffic",
78 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '113' },
81 "Border Gateway Protocol traffic",
82 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '179' },
85 "BitTorrent traffic for BitTorrent 3.1 and earlier",
86 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6889' },
87 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
90 "BitTorrent traffic for BitTorrent 3.2 and later",
91 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6999' },
92 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
95 "Concurrent Versions System pserver traffic",
96 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2401' },
99 "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
100 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1494' },
101 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1604' },
102 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2598' },
105 "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
106 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3689' },
107 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3689' },
110 "Distributed Checksum Clearinghouse spam filtering mechanism",
111 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6277' },
114 "Forwarded DHCP traffic (bidirectional)",
115 { action
=> 'PARAM', proto
=> 'udp', dport
=> '67:68', sport
=> '67:68' },
116 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '67:68', sport
=> '67:68' },
119 "Domain Name System traffic (upd and tcp)",
120 { action
=> 'PARAM', proto
=> 'udp', dport
=> '53' },
121 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '53' },
124 "Distributed Compiler service",
125 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3632' },
128 "File Transfer Protocol",
129 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '21' },
132 "Finger protocol (RFC 742)",
133 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '79' },
136 "GNUnet secure peer-to-peer networking traffic",
137 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2086' },
138 { action
=> 'PARAM', proto
=> 'udp', dport
=> '2086' },
139 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1080' },
140 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1080' },
143 "Generic Routing Encapsulation tunneling protocol (bidirectional)",
144 { action
=> 'PARAM', proto
=> '47' },
145 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '47' },
148 "Git distributed revision control traffic",
149 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9418' },
152 "OpenPGP HTTP keyserver protocol traffic",
153 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '11371' },
156 "Hypertext Transfer Protocol (WWW)",
157 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
160 "Hypertext Transfer Protocol (WWW) over SSL",
161 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
164 "Internet Cache Protocol V2 (Squid) traffic",
165 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3130' },
168 "AOL Instant Messenger traffic",
169 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5190' },
172 "Internet Message Access Protocol",
173 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '143' },
176 "Internet Message Access Protocol over SSL",
177 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '993' },
180 "IPIP capsulation traffic (bidirectional)",
181 { action
=> 'PARAM', proto
=> '94' },
182 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '94' },
185 "IPsec traffic (bidirectional)",
186 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
187 { action
=> 'PARAM', proto
=> '50' },
188 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '500', sport
=> '500' },
189 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '50' },
192 "IPsec authentication (AH) traffic (bidirectional)",
193 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
194 { action
=> 'PARAM', proto
=> '51' },
195 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '500', sport
=> '500' },
196 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '51' },
199 "IPsec traffic and Nat-Traversal (bidirectional)",
200 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500' },
201 { action
=> 'PARAM', proto
=> 'udp', dport
=> '4500' },
202 { action
=> 'PARAM', proto
=> '50' },
203 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '500' },
204 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '4500' },
205 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '50' },
208 "Internet Relay Chat traffic",
209 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6667' },
212 "HP Jetdirect printing",
213 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9100' },
216 "Layer 2 Tunneling Protocol traffic",
217 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1701' },
218 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '1701' },
221 "Lightweight Directory Access Protocol traffic",
222 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '389' },
225 "Secure Lightweight Directory Access Protocol traffic",
226 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '636' },
229 "Microsoft Notification Protocol",
230 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1863' },
233 "Microsoft SQL Server",
234 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1433' },
237 "Mail traffic (SMTP, SMTPS, Submission)",
238 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
239 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
240 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
243 "Munin networked resource monitoring traffic",
244 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '4949' },
248 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3306' },
251 "NNTP traffic (Usenet).",
252 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '119' },
255 "Encrypted NNTP traffic (Usenet)",
256 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '563' },
259 "Network Time Protocol (ntpd)",
260 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
263 "Bi-directional NTP (for NTP peers)",
264 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
265 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '123' },
268 "OSPF multicast traffic",
269 { action
=> 'PARAM', proto
=> '89' },
273 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1194' },
276 "Symantec PCAnywere (tm)",
277 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5632' },
278 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5631' },
282 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '110' },
285 "Encrypted POP3 traffic",
286 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '995' },
289 "Point-to-Point Tunneling Protocol",
290 { action
=> 'PARAM', proto
=> '47' },
291 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '47' },
292 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1723' },
296 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
300 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5432' },
303 "Line Printer protocol printing",
304 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '515' },
307 "Microsoft Remote Desktop Protocol traffic",
308 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3389' },
311 "Routing Information Protocol (bidirectional)",
312 { action
=> 'PARAM', proto
=> 'udp', dport
=> '520' },
313 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '520' },
316 "BIND remote management protocol",
317 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '953' },
320 "Razor Antispam System",
321 { action
=> 'ACCEPT', proto
=> 'tcp', dport
=> '2703' },
324 "Remote time retrieval (rdate)",
325 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
329 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '873' },
332 "SANE network scanning",
333 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6566' },
336 "Microsoft SMB traffic",
337 { action
=> 'PARAM', proto
=> 'udp', dport
=> '135,445' },
338 { action
=> 'PARAM', proto
=> 'udp', dport
=> '137:139' },
339 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
340 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '135,139,445' },
343 "Microsoft SMB traffic (bidirectional)",
344 { action
=> 'PARAM', proto
=> 'udp', dport
=> '135,445' },
345 { action
=> 'PARAM', proto
=> 'udp', dport
=> '137:139' },
346 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
347 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '135,139,445' },
348 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '135,445' },
349 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '137:139' },
350 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
351 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'tcp', dport
=> '135,139,445' },
354 "Samba Web Administration Tool",
355 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '901' },
358 "Simple Mail Transfer Protocol",
359 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
362 "Encrypted Simple Mail Transfer Protocol",
363 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
366 "Simple Network Management Protocol",
367 { action
=> 'PARAM', proto
=> 'udp', dport
=> '161:162' },
368 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '161' },
371 "Spam Assassin SPAMD traffic",
372 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '783' },
375 "Secure shell traffic",
376 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '22' },
379 "Subversion server (svnserve)",
380 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3690' },
383 "SixXS IPv6 Deployment and Tunnel Broker",
384 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3874' },
385 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3740' },
386 { action
=> 'PARAM', proto
=> '41' },
387 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5072,8374' },
390 "Squid web proxy traffic",
391 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3128' },
394 "Mail message submission traffic",
395 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
398 "Syslog protocol (RFC 5424) traffic",
399 { action
=> 'PARAM', proto
=> 'udp', dport
=> '514' },
400 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '514' },
403 "Trivial File Transfer Protocol traffic",
404 { action
=> 'PARAM', proto
=> 'udp', dport
=> '69' },
408 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '23' },
412 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '992' },
415 "RFC 868 Time protocol",
416 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
419 "Traceroute (for up to 30 hops) traffic",
420 { action
=> 'PARAM', proto
=> 'udp', dport
=> '33434:33524' },
421 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
424 "VNC traffic for VNC display's 0 - 9",
425 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5900:5909' },
428 "VNC traffic from Vncservers to Vncviewers in listen mode",
429 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5500' },
432 "WWW traffic (HTTP and HTTPS)",
433 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
434 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
437 "Web Cache/Proxy traffic (port 8080)",
438 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '8080' },
442 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10000' },
445 "Whois (nicname, RFC 3912) traffic",
446 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '43' },
450 my $pve_fw_parsed_macros;
451 my $pve_fw_macro_descr;
452 my $pve_fw_preferred_macro_names = {};
454 my $pve_std_chains = {
455 'PVEFW-SET-ACCEPT-MARK' => [
456 "-j MARK --set-mark 1",
458 'PVEFW-DropBroadcast' => [
459 # same as shorewall 'Broadcast'
460 # simply DROP BROADCAST/MULTICAST/ANYCAST
461 # we can use this to reduce logging
462 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
463 { action
=> 'DROP', dsttype
=> 'MULTICAST' },
464 { action
=> 'DROP', dsttype
=> 'ANYCAST' },
465 { action
=> 'DROP', dest
=> '224.0.0.0/4' },
468 # same as shorewall 'reject'
469 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
470 { action
=> 'DROP', source
=> '224.0.0.0/4' },
471 { action
=> 'DROP', proto
=> 'icmp' },
472 "-p tcp -j REJECT --reject-with tcp-reset",
473 "-p udp -j REJECT --reject-with icmp-port-unreachable",
474 "-p icmp -j REJECT --reject-with icmp-host-unreachable",
475 "-j REJECT --reject-with icmp-host-prohibited",
478 # same as shorewall 'Drop', which is equal to DROP,
479 # but REJECT/DROP some packages to reduce logging,
480 # and ACCEPT critical ICMP types
481 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
482 # we are not interested in BROADCAST/MULTICAST/ANYCAST
483 { action
=> 'PVEFW-DropBroadcast' },
484 # ACCEPT critical ICMP types
485 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
486 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
487 # Drop packets with INVALID state
488 "-m conntrack --ctstate INVALID -j DROP",
489 # Drop Microsoft SMB noise
490 { action
=> 'DROP', proto
=> 'udp', dport
=> '135,445', nbdport
=> 2 },
491 { action
=> 'DROP', proto
=> 'udp', dport
=> '137:139'},
492 { action
=> 'DROP', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
493 { action
=> 'DROP', proto
=> 'tcp', dport
=> '135,139,445', nbdport
=> 3 },
494 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
495 # Drop new/NotSyn traffic so that it doesn't get logged
496 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
498 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
501 # same as shorewall 'Reject', which is equal to Reject,
502 # but REJECT/DROP some packages to reduce logging,
503 # and ACCEPT critical ICMP types
504 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
505 # we are not interested in BROADCAST/MULTICAST/ANYCAST
506 { action
=> 'PVEFW-DropBroadcast' },
507 # ACCEPT critical ICMP types
508 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
509 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
510 # Drop packets with INVALID state
511 "-m conntrack --ctstate INVALID -j DROP",
512 # Drop Microsoft SMB noise
513 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '135,445', nbdport
=> 2 },
514 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '137:139'},
515 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
516 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '135,139,445', nbdport
=> 3 },
517 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
518 # Drop new/NotSyn traffic so that it doesn't get logged
519 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
521 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
523 'PVEFW-tcpflags' => [
524 # same as shorewall tcpflags action.
525 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
526 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
527 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
528 "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
529 "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
530 "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
533 # same as shorewall smurfs action
534 # Filter packets for smurfs (packets with a broadcast address as the source).
535 "-s 0.0.0.0/32 -j RETURN",
536 "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
537 "-s 224.0.0.0/4 -g PVEFW-smurflog",
541 # iptables -p icmp -h
542 my $icmp_type_names = {
545 'destination-unreachable' => 1,
546 'network-unreachable' => 1,
547 'host-unreachable' => 1,
548 'protocol-unreachable' => 1,
549 'port-unreachable' => 1,
550 'fragmentation-needed' => 1,
551 'source-route-failed' => 1,
552 'network-unknown' => 1,
554 'network-prohibited' => 1,
555 'host-prohibited' => 1,
556 'TOS-network-unreachable' => 1,
557 'TOS-host-unreachable' => 1,
558 'communication-prohibited' => 1,
559 'host-precedence-violation' => 1,
560 'precedence-cutoff' => 1,
561 'source-quench' => 1,
563 'network-redirect' => 1,
564 'host-redirect' => 1,
565 'TOS-network-redirect' => 1,
566 'TOS-host-redirect' => 1,
568 'router-advertisement' => 1,
569 'router-solicitation' => 1,
570 'time-exceeded' => 1,
571 'ttl-zero-during-transit' => 1,
572 'ttl-zero-during-reassembly' => 1,
573 'parameter-problem' => 1,
574 'ip-header-bad' => 1,
575 'required-option-missing' => 1,
576 'timestamp-request' => 1,
577 'timestamp-reply' => 1,
578 'address-mask-request' => 1,
579 'address-mask-reply' => 1,
582 sub init_firewall_macros
{
584 $pve_fw_parsed_macros = {};
586 foreach my $k (keys %$pve_fw_macros) {
587 my $lc_name = lc($k);
588 my $macro = $pve_fw_macros->{$k};
589 if (!ref($macro->[0])) {
590 $pve_fw_macro_descr->{$k} = shift @$macro;
592 $pve_fw_preferred_macro_names->{$lc_name} = $k;
593 $pve_fw_parsed_macros->{$k} = $macro;
597 init_firewall_macros
();
600 return wantarray ?
($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
605 sub get_etc_services
{
607 return $etc_services if $etc_services;
609 my $filename = "/etc/services";
611 my $fh = IO
::File-
>new($filename, O_RDONLY
);
613 warn "unable to read '$filename' - $!\n";
619 while (my $line = <$fh>) {
621 next if $line =~m/^#/;
622 next if ($line =~m/^\s*$/);
624 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
625 $services->{byid
}->{$2}->{name
} = $1;
626 $services->{byid
}->{$2}->{port
} = $2;
627 $services->{byid
}->{$2}->{$3} = 1;
628 $services->{byname
}->{$1} = $services->{byid
}->{$2};
634 $etc_services = $services;
637 return $etc_services;
642 sub get_etc_protocols
{
643 return $etc_protocols if $etc_protocols;
645 my $filename = "/etc/protocols";
647 my $fh = IO
::File-
>new($filename, O_RDONLY
);
649 warn "unable to read '$filename' - $!\n";
655 while (my $line = <$fh>) {
657 next if $line =~m/^#/;
658 next if ($line =~m/^\s*$/);
660 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
661 $protocols->{byid
}->{$2}->{name
} = $1;
662 $protocols->{byname
}->{$1} = $protocols->{byid
}->{$2};
668 $etc_protocols = $protocols;
670 return $etc_protocols;
673 sub parse_address_list
{
676 return if $str !~ m/^(\+)(\S+)$/; # ipset ref
680 foreach my $elem (split(/,/, $str)) {
682 if (!Net
::IP-
>new($elem)) {
683 my $err = Net
::IP
::Error
();
684 die "invalid IP address: $err\n";
686 $iprange = 1 if $elem =~ m/-/;
689 die "you can use a range in a list\n" if $iprange && $count > 1;
692 sub parse_port_name_number_or_range
{
695 my $services = PVE
::Firewall
::get_etc_services
();
697 foreach my $item (split(/,/, $str)) {
699 if ($item =~ m/^(\d+):(\d+)$/) {
700 my ($port1, $port2) = ($1, $2);
701 die "invalid port '$port1'\n" if $port1 > 65535;
702 die "invalid port '$port2'\n" if $port2 > 65535;
703 } elsif ($item =~ m/^(\d+)$/) {
705 die "invalid port '$port'\n" if $port > 65535;
707 die "invalid port '$item'\n" if !$services->{byname
}->{$item};
714 PVE
::JSONSchema
::register_format
('pve-fw-port-spec', \
&pve_fw_verify_port_spec
);
715 sub pve_fw_verify_port_spec
{
718 parse_port_name_number_or_range
($portstr);
723 PVE
::JSONSchema
::register_format
('pve-fw-v4addr-spec', \
&pve_fw_verify_v4addr_spec
);
724 sub pve_fw_verify_v4addr_spec
{
727 parse_address_list
($list);
732 PVE
::JSONSchema
::register_format
('pve-fw-protocol-spec', \
&pve_fw_verify_protocol_spec
);
733 sub pve_fw_verify_protocol_spec
{
736 my $protocols = get_etc_protocols
();
738 die "unknown protocol '$proto'\n" if $proto &&
739 !(defined($protocols->{byname
}->{$proto}) ||
740 defined($protocols->{byid
}->{$proto}));
746 # helper function for API
748 my $rule_properties = {
750 description
=> "Update rule at position <pos>.",
764 enum
=> ['in', 'out', 'group'],
769 enum
=> ['ACCEPT', 'DROP', 'REJECT'],
776 iface
=> get_standard_option
('pve-iface', { optional
=> 1 }),
778 type
=> 'string', format
=> 'pve-fw-v4addr-spec',
782 type
=> 'string', format
=> 'pve-fw-v4addr-spec',
786 type
=> 'string', format
=> 'pve-fw-protocol-spec',
794 type
=> 'string', format
=> 'pve-fw-port-spec',
798 type
=> 'string', format
=> 'pve-fw-port-spec',
807 sub cleanup_fw_rule
{
808 my ($rule, $digest, $pos) = @_;
812 foreach my $k (keys %$rule) {
813 next if !$rule_properties->{$k};
815 next if !defined($v);
817 $r->{digest
} = $digest;
824 sub add_rule_properties
{
825 my ($properties) = @_;
827 foreach my $k (keys %$rule_properties) {
828 my $h = $rule_properties->{$k};
829 # copy data, so that we can modify later without side effects
830 foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
836 sub delete_rule_properties
{
837 my ($rule, $delete_str) = @_;
839 foreach my $opt (PVE
::Tools
::split_list
($delete_str)) {
840 raise_param_exc
({ 'delete' => "no such property ('$opt')"})
841 if !defined($rule_properties->{$opt});
842 raise_param_exc
({ 'delete' => "unable to delete required property '$opt'"})
843 if $opt eq 'type' || $opt eq 'action';
844 delete $rule->{$opt};
851 my ($rule, $allow_groups) = @_;
853 my $type = $rule->{type
};
855 raise_param_exc
({ type
=> "missing property"}) if !$type;
856 raise_param_exc
({ action
=> "missing property"}) if !$rule->{action
};
858 if ($type eq 'in' || $type eq 'out') {
859 raise_param_exc
({ action
=> "unknown action '$rule->{action}'"})
860 if $rule->{action
} !~ m/^(ACCEPT|DROP|REJECT)$/;
861 } elsif ($type eq 'group') {
862 raise_param_exc
({ type
=> "security groups not allowed"})
864 raise_param_exc
({ action
=> "invalid characters in security group name"})
865 if $rule->{action
} !~ m/^[A-Za-z0-9_\-]+$/;
867 raise_param_exc
({ type
=> "unknown rule type '$type'"});
870 # fixme: verify $rule->{iface}?
872 if ($rule->{macro}) {
873 my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})};
874 raise_param_exc
({ macro => "unknown macro '$rule->{macro}'"}) if !$preferred_name;
875 $rule->{macro} = $preferred_name;
878 if ($rule->{dport
}) {
879 eval { parse_port_name_number_or_range
($rule->{dport
}); };
880 raise_param_exc
({ dport
=> $@ }) if $@;
883 if ($rule->{sport
}) {
884 eval { parse_port_name_number_or_range
($rule->{sport
}); };
885 raise_param_exc
({ sport
=> $@ }) if $@;
888 if ($rule->{source
}) {
889 eval { parse_address_list
($rule->{source
}); };
890 raise_param_exc
({ source
=> $@ }) if $@;
894 eval { parse_address_list
($rule->{dest
}); };
895 raise_param_exc
({ dest
=> $@ }) if $@;
902 my ($rule, $param) = @_;
904 foreach my $k (keys %$rule_properties) {
905 if (defined(my $v = $param->{$k})) {
906 if ($v eq '' || $v eq '-') {
922 my $bridge_firewall_enabled = 0;
924 sub enable_bridge_firewall
{
926 return if $bridge_firewall_enabled; # only once
928 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
929 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
931 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
932 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/ipv4/tcp_syncookies", "1");
934 $bridge_firewall_enabled = 1;
937 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
939 sub iptables_restore_cmdlist
{
942 run_command
("/sbin/iptables-restore -n", input
=> $cmdlist);
945 sub ipset_restore_cmdlist
{
948 run_command
("/usr/sbin/ipset restore", input
=> $cmdlist);
951 sub iptables_get_chains
{
955 # check what chains we want to track
956 my $is_pvefw_chain = sub {
959 return 1 if $name =~ m/^PVEFW-\S+$/;
961 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
963 return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
965 return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
967 return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT|IPS)$/;
968 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
980 return if $line =~ m/^#/;
981 return if $line =~ m/^\s*$/;
983 if ($line =~ m/^\*(\S+)$/) {
988 return if $table ne 'filter';
990 if ($line =~ m/^:(\S+)\s/) {
992 return if !&$is_pvefw_chain($chain);
993 $res->{$chain} = "unknown";
994 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
995 my ($chain, $sig) = ($1, $2);
996 return if !&$is_pvefw_chain($chain);
997 $res->{$chain} = $sig;
998 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1001 # simply ignore the rest
1006 run_command
("/sbin/iptables-save", outfunc
=> $parser);
1008 return wantarray ?
($res, $hooks) : $res;
1011 sub iptables_chain_digest
{
1013 my $digest = Digest
::SHA-
>new('sha1');
1014 foreach my $rule (@$rules) { # order is important
1015 $digest->add($rule);
1017 return $digest->b64digest;
1020 sub ipset_chain_digest
{
1023 my $digest = Digest
::SHA-
>new('sha1');
1024 foreach my $rule (sort @$rules) { # note: sorted
1025 $digest->add($rule);
1027 return $digest->b64digest;
1030 sub ipset_get_chains
{
1038 return if $line =~ m/^#/;
1039 return if $line =~ m/^\s*$/;
1040 if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1042 $line =~ s/\s+$//; # delete trailing white space
1043 push @{$chains->{$chain}}, $line;
1045 # simply ignore the rest
1050 run_command
("/usr/sbin/ipset save", outfunc
=> $parser);
1052 # compute digest for each chain
1053 foreach my $chain (keys %$chains) {
1054 $res->{$chain} = ipset_chain_digest
($chains->{$chain});
1060 sub ruleset_generate_cmdstr
{
1061 my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1063 return if defined($rule->{enable
}) && !$rule->{enable
};
1065 die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1067 my $nbdport = defined($rule->{dport
}) ? parse_port_name_number_or_range
($rule->{dport
}) : 0;
1068 my $nbsport = defined($rule->{sport
}) ? parse_port_name_number_or_range
($rule->{sport
}) : 0;
1072 push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in
};
1073 push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out
};
1075 my $source = $rule->{source
};
1076 my $dest = $rule->{dest
};
1079 if ($source =~ m/^(\+)(\S+)$/) {
1080 die "no such ipset $2" if !$cluster_conf->{ipset
}->{$2};
1081 push @cmd, "-m set --match-set PVEFW-$2 src";
1083 } elsif ($source =~ m/\-/){
1084 push @cmd, "-m iprange --src-range $source";
1087 push @cmd, "-s $source";
1092 if ($dest =~ m/^(\+)(\S+)$/) {
1093 die "no such ipset $2" if !$cluster_conf->{ipset
}->{$2};
1094 push @cmd, "-m set --match-set PVEFW-$2 dst";
1096 } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1097 push @cmd, "-m iprange --dst-range $dest";
1100 push @cmd, "-s $dest";
1104 if ($rule->{proto
}) {
1105 push @cmd, "-p $rule->{proto}";
1108 $multiport++ if $nbdport > 1;
1109 $multiport++ if $nbsport > 1;
1111 push @cmd, "--match multiport" if $multiport;
1113 die "multiport: option '--sports' cannot be used together with '--dports'\n"
1114 if ($multiport == 2) && ($rule->{dport
} ne $rule->{sport
});
1116 if ($rule->{dport
}) {
1117 if ($rule->{proto
} && $rule->{proto
} eq 'icmp') {
1118 # Note: we use dport to store --icmp-type
1119 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport
}});
1120 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1123 if ($multiport == 2) {
1124 push @cmd, "--ports $rule->{dport}";
1126 push @cmd, "--dports $rule->{dport}";
1129 push @cmd, "--dport $rule->{dport}";
1134 if ($rule->{sport
}) {
1136 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1138 push @cmd, "--sport $rule->{sport}";
1141 } elsif ($rule->{dport
} || $rule->{sport
}) {
1142 warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport
};
1143 warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport
};
1146 push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype
};
1148 if (my $action = $rule->{action
}) {
1149 $action = $actions->{$action} if defined($actions->{$action});
1150 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1151 push @cmd, $goto ?
"-g $action" : "-j $action";
1154 return scalar(@cmd) ?
join(' ', @cmd) : undef;
1157 my $apply_macro = sub {
1158 my ($macro_name, $param) = @_;
1160 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1161 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1165 foreach my $templ (@$macro_rules) {
1167 my $param_used = {};
1168 foreach my $k (keys %$templ) {
1169 my $v = $templ->{$k};
1170 if ($v eq 'PARAM') {
1172 $param_used->{$k} = 1;
1173 } elsif ($v eq 'DEST') {
1174 $v = $param->{dest
};
1175 $param_used->{dest
} = 1;
1176 } elsif ($v eq 'SOURCE') {
1177 $v = $param->{source
};
1178 $param_used->{source
} = 1;
1181 die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
1184 foreach my $k (keys %$param) {
1185 next if $k eq 'macro';
1186 next if !defined($param->{$k});
1187 next if $param_used->{$k};
1188 if (defined($rule->{$k})) {
1189 die "parameter '$k' already define in macro (value = '$rule->{$k}')\n"
1190 if $rule->{$k} ne $param->{$k};
1192 $rule->{$k} = $param->{$k};
1195 push @$rules, $rule;
1201 sub ruleset_generate_rule
{
1202 my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1206 if ($rule->{macro}) {
1207 $rules = &$apply_macro($rule->{macro}, $rule);
1212 foreach my $tmp (@$rules) {
1213 if (my $cmdstr = ruleset_generate_cmdstr
($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
1214 ruleset_addrule
($ruleset, $chain, $cmdstr);
1219 sub ruleset_generate_rule_insert
{
1220 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1222 die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1224 if (my $cmdstr = ruleset_generate_cmdstr
($ruleset, $chain, $rule, $actions, $goto)) {
1225 ruleset_insertrule
($ruleset, $chain, $cmdstr);
1229 sub ruleset_create_chain
{
1230 my ($ruleset, $chain) = @_;
1232 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1233 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1235 die "chain '$chain' already exists\n" if $ruleset->{$chain};
1237 $ruleset->{$chain} = [];
1240 sub ruleset_chain_exist
{
1241 my ($ruleset, $chain) = @_;
1243 return $ruleset->{$chain} ?
1 : undef;
1246 sub ruleset_addrule
{
1247 my ($ruleset, $chain, $rule) = @_;
1249 die "no such chain '$chain'\n" if !$ruleset->{$chain};
1251 push @{$ruleset->{$chain}}, "-A $chain $rule";
1254 sub ruleset_insertrule
{
1255 my ($ruleset, $chain, $rule) = @_;
1257 die "no such chain '$chain'\n" if !$ruleset->{$chain};
1259 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1262 sub get_log_rule_base
{
1263 my ($chain, $vmid, $msg, $loglevel) = @_;
1265 die "internal error - no log level" if !defined($loglevel);
1267 $vmid = 0 if !defined($vmid);
1269 # Note: we use special format for prefix to pass further
1270 # info to log daemon (VMID, LOGVELEL and CHAIN)
1272 return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1275 sub ruleset_addlog {
1276 my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1278 return if !defined($loglevel);
1280 my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1282 $logrule = "$rule $logrule" if defined($rule);
1284 ruleset_addrule($ruleset, $chain, $logrule)
1287 sub generate_bridge_chains {
1288 my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_;
1290 my $options = $hostfw_conf->{options} || {};
1292 die "error
: detected direct route to bridge
'$bridge'\n"
1293 if !$options->{allow_bridge_route} && $routing_table->{$bridge};
1295 if (!ruleset_chain_exist($ruleset, "$bridge-FW
")) {
1296 ruleset_create_chain($ruleset, "$bridge-FW
");
1297 ruleset_addrule($ruleset, "PVEFW-FORWARD
", "-o
$bridge -m physdev
--physdev-is-out
-j
$bridge-FW
");
1298 ruleset_addrule($ruleset, "PVEFW-FORWARD
", "-i
$bridge -m physdev
--physdev-is-in
-j
$bridge-FW
");
1301 if (!ruleset_chain_exist($ruleset, "$bridge-OUT
")) {
1302 ruleset_create_chain($ruleset, "$bridge-OUT
");
1303 ruleset_addrule($ruleset, "$bridge-FW
", "-m physdev
--physdev-is-in
-j
$bridge-OUT
");
1304 ruleset_insertrule($ruleset, "PVEFW-INPUT
", "-i
$bridge -m physdev
--physdev-is-in
-j
$bridge-OUT
");
1307 if (!ruleset_chain_exist($ruleset, "$bridge-IN
")) {
1308 ruleset_create_chain($ruleset, "$bridge-IN
");
1309 ruleset_addrule($ruleset, "$bridge-FW
", "-m physdev
--physdev-is-out
-j
$bridge-IN
");
1310 ruleset_addrule($ruleset, "$bridge-FW
", "-m mark
--mark
1 -j ACCEPT
");
1311 # accept traffic to unmanaged bridge ports
1312 ruleset_addrule($ruleset, "$bridge-FW
", "-m physdev
--physdev-is-out
-j ACCEPT
");
1316 sub ruleset_add_chain_policy {
1317 my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1319 if ($policy eq 'ACCEPT') {
1321 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1322 { ACCEPT => $accept_action});
1324 } elsif ($policy eq 'DROP') {
1326 ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop
");
1328 ruleset_addlog($ruleset, $chain, $vmid, "policy
$policy: ", $loglevel);
1330 ruleset_addrule($ruleset, $chain, "-j DROP
");
1331 } elsif ($policy eq 'REJECT') {
1332 ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject
");
1334 ruleset_addlog($ruleset, $chain, $vmid, "policy
$policy: ", $loglevel);
1336 ruleset_addrule($ruleset, $chain, "-g PVEFW-reject
");
1339 die "internal error
: unknown policy
'$policy'";
1343 sub ruleset_create_vm_chain {
1344 my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
1346 ruleset_create_chain($ruleset, $chain);
1347 my $accept = generate_nfqueue($options);
1349 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1350 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
,NEW
-j PVEFW-smurfs
");
1353 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1354 if ($direction eq 'OUT') {
1355 ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1356 proto => 'udp', sport => 68, dport => 67 });
1358 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1359 proto => 'udp', sport => 67, dport => 68 });
1363 if ($options->{tcpflags}) {
1364 ruleset_addrule($ruleset, $chain, "-p tcp
-j PVEFW-tcpflags
");
1367 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
-j DROP
");
1368 if ($direction eq 'OUT') {
1369 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
-g PVEFW-SET-ACCEPT-MARK
");
1371 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
-j
$accept");
1374 if ($direction eq 'OUT') {
1375 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1376 ruleset_addrule($ruleset, $chain, "-m mac
! --mac-source
$macaddr -j DROP
");
1378 ruleset_addrule($ruleset, $chain, "-j MARK
--set-mark
0"); # clear mark
1382 sub ruleset_generate_vm_rules {
1383 my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
1385 my $lc_direction = lc($direction);
1387 foreach my $rule (@$rules) {
1388 next if $rule->{iface} && $rule->{iface} ne $netid;
1389 next if !$rule->{enable};
1390 if ($rule->{type} eq 'group') {
1391 my $group_chain = "GROUP-
$rule->{action
}-$direction";
1392 if(!ruleset_chain_exist($ruleset, $group_chain)){
1393 generate_group_rules($ruleset, $cluster_conf, $rule->{action});
1395 ruleset_addrule($ruleset, $chain, "-j
$group_chain");
1396 if ($direction eq 'OUT'){
1397 ruleset_addrule($ruleset, $chain, "-m mark
--mark
1 -j RETURN
");
1399 my $accept = generate_nfqueue($options);
1400 ruleset_addrule($ruleset, $chain, "-m mark
--mark
1 -j
$accept");
1404 next if $rule->{type} ne $lc_direction;
1405 if ($direction eq 'OUT') {
1406 ruleset_generate_rule($ruleset, $chain, $rule,
1407 { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" }, undef, $cluster_conf);
1409 my $accept = generate_nfqueue($options);
1410 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept , REJECT => "PVEFW-reject
" }, undef, $cluster_conf);
1416 sub generate_nfqueue {
1420 if($options->{ips}){
1421 $action = "NFQUEUE
";
1422 if($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1423 if(defined($3) && defined($1)) {
1424 $action .= " --queue-balance
$1:$3";
1425 }elsif (defined($1)) {
1426 $action .= " --queue-num
$1";
1429 $action .= " --queue-bypass
";
1437 sub ruleset_generate_vm_ipsrules {
1438 my ($ruleset, $options, $direction, $iface, $bridge) = @_;
1440 if ($options->{ips} && $direction eq 'IN') {
1441 my $nfqueue = generate_nfqueue($options);
1443 if (!ruleset_chain_exist($ruleset, "$bridge-IPS
")) {
1444 ruleset_create_chain($ruleset, "PVEFW-IPS
");
1447 if (!ruleset_chain_exist($ruleset, "$bridge-IPS
")) {
1448 ruleset_create_chain($ruleset, "$bridge-IPS
");
1449 ruleset_insertrule($ruleset, "PVEFW-IPS
", "-o
$bridge -m physdev
--physdev-is-out
-j
$bridge-IPS
");
1452 ruleset_addrule($ruleset, "$bridge-IPS
", "-m physdev
--physdev-out
$iface --physdev-is-bridged
-j
$nfqueue");
1456 sub generate_venet_rules_direction {
1457 my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1459 parse_address_list($ip); # make sure we have a valid $ip list
1461 my $lc_direction = lc($direction);
1463 my $rules = $vmfw_conf->{rules};
1465 my $options = $vmfw_conf->{options};
1466 my $loglevel = get_option_log_level($options, "log_level_
${lc_direction
}");
1468 my $chain = "venet0-
$vmid-$direction";
1470 ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1472 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
1477 if ($direction eq 'OUT') {
1478 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1480 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1483 my $accept = generate_nfqueue($options);
1484 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : $accept;
1485 ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1487 # plug into FORWARD, INPUT and OUTPUT chain
1488 if ($direction eq 'OUT') {
1489 ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD
", {
1492 iface_in => 'venet0'});
1494 ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT
", {
1497 iface_in => 'venet0'});
1499 ruleset_generate_rule($ruleset, "PVEFW-FORWARD
", {
1502 iface_out => 'venet0'});
1504 ruleset_generate_rule($ruleset, "PVEFW-OUTPUT
", {
1507 iface_out => 'venet0'});
1511 sub generate_tap_rules_direction {
1512 my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_;
1514 my $lc_direction = lc($direction);
1516 my $rules = $vmfw_conf->{rules};
1518 my $options = $vmfw_conf->{options};
1519 my $loglevel = get_option_log_level($options, "log_level_
${lc_direction
}");
1521 my $tapchain = "$iface-$direction";
1523 ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1525 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
1527 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface, $bridge);
1532 if ($direction eq 'OUT') {
1533 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1535 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1538 my $accept = generate_nfqueue($options);
1539 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : $accept;
1540 ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1542 # plug the tap chain to bridge chain
1543 if ($direction eq 'IN') {
1544 ruleset_insertrule($ruleset, "$bridge-IN
",
1545 "-m physdev
--physdev-is-bridged
--physdev-out
$iface -j
$tapchain");
1547 ruleset_insertrule($ruleset, "$bridge-OUT
",
1548 "-m physdev
--physdev-in
$iface -j
$tapchain");
1552 sub enable_host_firewall {
1553 my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1555 # fixme: allow security groups
1557 my $options = $hostfw_conf->{options};
1558 my $rules = $hostfw_conf->{rules};
1560 # host inbound firewall
1561 my $chain = "PVEFW-HOST-IN
";
1562 ruleset_create_chain($ruleset, $chain);
1564 my $loglevel = get_option_log_level($options, "log_level_in
");
1566 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1567 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
,NEW
-j PVEFW-smurfs
");
1570 if ($options->{tcpflags}) {
1571 ruleset_addrule($ruleset, $chain, "-p tcp
-j PVEFW-tcpflags
");
1574 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
-j DROP
");
1575 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
-j ACCEPT
");
1576 ruleset_addrule($ruleset, $chain, "-i lo
-j ACCEPT
");
1577 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
-j ACCEPT
");
1578 ruleset_addrule($ruleset, $chain, "-p udp
-m conntrack
--ctstate NEW
--dport
5404:5405 -j ACCEPT
");
1579 ruleset_addrule($ruleset, $chain, "-p udp
-m udp
--dport
9000 -j ACCEPT
"); #corosync
1581 # we use RETURN because we need to check also tap rules
1582 my $accept_action = 'RETURN';
1584 foreach my $rule (@$rules) {
1585 next if $rule->{type} ne 'in';
1586 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" }, undef, $cluster_conf);
1589 # implement input policy
1590 my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1591 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1593 # host outbound firewall
1594 $chain = "PVEFW-HOST-OUT
";
1595 ruleset_create_chain($ruleset, $chain);
1597 $loglevel = get_option_log_level($options, "log_level_out
");
1599 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
-j DROP
");
1600 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
-j ACCEPT
");
1601 ruleset_addrule($ruleset, $chain, "-o lo
-j ACCEPT
");
1602 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
-j ACCEPT
");
1603 ruleset_addrule($ruleset, $chain, "-p udp
-m conntrack
--ctstate NEW
--dport
5404:5405 -j ACCEPT
");
1604 ruleset_addrule($ruleset, $chain, "-p udp
-m udp
--dport
9000 -j ACCEPT
"); #corosync
1606 # we use RETURN because we may want to check other thigs later
1607 $accept_action = 'RETURN';
1609 foreach my $rule (@$rules) {
1610 next if $rule->{type} ne 'out';
1611 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" }, undef, $cluster_conf);
1614 # implement output policy
1615 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1616 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1618 ruleset_addrule($ruleset, "PVEFW-OUTPUT
", "-j PVEFW-HOST-OUT
");
1619 ruleset_addrule($ruleset, "PVEFW-INPUT
", "-j PVEFW-HOST-IN
");
1622 sub generate_group_rules {
1623 my ($ruleset, $cluster_conf, $group) = @_;
1624 die "no such security group
'$group'\n" if !$cluster_conf->{groups}->{$group};
1626 my $rules = $cluster_conf->{groups}->{$group};
1628 my $chain = "GROUP-
${group
}-IN
";
1630 ruleset_create_chain($ruleset, $chain);
1631 ruleset_addrule($ruleset, $chain, "-j MARK
--set-mark
0"); # clear mark
1633 foreach my $rule (@$rules) {
1634 next if $rule->{type} ne 'in';
1635 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" }, undef, $cluster_conf);
1638 $chain = "GROUP-
${group
}-OUT
";
1640 ruleset_create_chain($ruleset, $chain);
1641 ruleset_addrule($ruleset, $chain, "-j MARK
--set-mark
0"); # clear mark
1643 foreach my $rule (@$rules) {
1644 next if $rule->{type} ne 'out';
1645 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1646 # check also other tap rules later
1647 ruleset_generate_rule($ruleset, $chain, $rule,
1648 { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject
" }, undef, $cluster_conf);
1653 my $valid_netdev_names = {};
1654 for (my $i = 0; $i < $MAX_NETS; $i++) {
1655 $valid_netdev_names->{"net
$i"} = 1;
1659 my ($line, $need_iface, $allow_groups) = @_;
1661 my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
1663 # we can add single line comments to the end of the rule
1664 my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
1666 # we can disable a rule when prefixed with '|'
1669 $enable = 0 if $line =~ s/^\|//;
1671 my @data = split(/\s+/, $line);
1672 my $expected_elements = $need_iface ? 8 : 7;
1674 die "wrong number of rule elements
\n" if scalar(@data) > $expected_elements;
1677 ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
1679 ($type, $action, $source, $dest, $proto, $dport, $sport) = @data;
1682 die "incomplete rule
\n" if ! ($type && $action);
1688 if ($type eq 'in' || $type eq 'out') {
1689 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1691 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1693 my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1694 die "unknown
macro '$1'\n" if !$preferred_name;
1695 $macro = $preferred_name;
1697 die "unknown action
'$action'\n";
1699 } elsif ($type eq 'group') {
1700 die "wrong number of rule elements
\n" if scalar(@data) != 3;
1701 die "groups disabled
\n" if !$allow_groups;
1703 die "invalid characters
in group name
\n" if $action !~ m/^[A-Za-z0-9_\-]+$/;
1705 die "unknown rule type
'$type'\n";
1709 $iface = undef if $iface && $iface eq '-';
1712 $proto = undef if $proto && $proto eq '-';
1713 pve_fw_verify_protocol_spec($proto) if $proto;
1715 $source = undef if $source && $source eq '-';
1716 $dest = undef if $dest && $dest eq '-';
1718 $dport = undef if $dport && $dport eq '-';
1719 $sport = undef if $sport && $sport eq '-';
1721 parse_port_name_number_or_range($dport) if defined($dport);
1722 parse_port_name_number_or_range($sport) if defined($sport);
1724 parse_address_list($source) if $source;
1725 parse_address_list($dest) if $dest;
1730 comment => $comment,
1742 sub parse_vmfw_option {
1747 my $loglevels = "emerg
|alert
|crit
|err
|warning
|notice
|info
|debug
|nolog
";
1749 if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags|ips):\s*(0|1)\s*$/i) {
1752 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1754 $value = $2 ? lc($3) : '';
1755 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1758 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1763 die "can
't parse option '$line'\n"
1766 return ($opt, $value);
1769 sub parse_hostfw_option {
1774 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1776 if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags|allow_bridge_route|optimize):\s*(0|1)\s*$/i) {
1779 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1781 $value = $2 ? lc($3) : '';
1782 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1785 } elsif ($line =~ m/^(nf_conntrack_max):\s*(\d+)\s*$/i) {
1790 die "can't parse option
'$line'\n"
1793 return ($opt, $value);
1796 sub parse_clusterfw_option {
1801 if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1806 die "can
't parse option '$line'\n"
1809 return ($opt, $value);
1812 sub parse_vm_fw_rules {
1813 my ($filename, $fh) = @_;
1815 my $res = { rules => [], options => {}};
1819 my $digest = Digest::SHA->new('sha1
');
1821 while (defined(my $line = <$fh>)) {
1822 $digest->add($line);
1824 next if $line =~ m/^#/;
1825 next if $line =~ m/^\s*$/;
1827 my $linenr = $fh->input_line_number();
1828 my $prefix = "$filename (line $linenr)";
1830 if ($line =~ m/^\[(\S+)\]\s*$/i) {
1832 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1836 warn "$prefix: skip line - no section";
1840 next if !$res->{$section}; # skip undefined section
1842 if ($section eq 'options
') {
1844 my ($opt, $value) = parse_vmfw_option($line);
1845 $res->{options}->{$opt} = $value;
1847 warn "$prefix: $@" if $@;
1852 eval { $rule = parse_fw_rule($line, 1, 1); };
1854 warn "$prefix: $err";
1858 push @{$res->{$section}}, $rule;
1861 $res->{digest} = $digest->b64digest;
1866 sub parse_host_fw_rules {
1867 my ($filename, $fh) = @_;
1869 my $res = { rules => [], options => {}};
1873 my $digest = Digest::SHA->new('sha1
');
1875 while (defined(my $line = <$fh>)) {
1876 $digest->add($line);
1878 next if $line =~ m/^#/;
1879 next if $line =~ m/^\s*$/;
1881 my $linenr = $fh->input_line_number();
1882 my $prefix = "$filename (line $linenr)";
1884 if ($line =~ m/^\[(\S+)\]\s*$/i) {
1886 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1890 warn "$prefix: skip line - no section";
1894 next if !$res->{$section}; # skip undefined section
1896 if ($section eq 'options
') {
1898 my ($opt, $value) = parse_hostfw_option($line);
1899 $res->{options}->{$opt} = $value;
1901 warn "$prefix: $@" if $@;
1906 eval { $rule = parse_fw_rule($line, 1, 1); };
1908 warn "$prefix: $err";
1912 push @{$res->{$section}}, $rule;
1915 $res->{digest} = $digest->b64digest;
1920 sub parse_cluster_fw_rules {
1921 my ($filename, $fh) = @_;
1926 my $res = { rules => [], options => {}, groups => {}, ipset => {} };
1928 my $digest = Digest::SHA->new('sha1
');
1930 while (defined(my $line = <$fh>)) {
1931 $digest->add($line);
1933 next if $line =~ m/^#/;
1934 next if $line =~ m/^\s*$/;
1936 my $linenr = $fh->input_line_number();
1937 my $prefix = "$filename (line $linenr)";
1939 if ($line =~ m/^\[options\]$/i) {
1940 $section = 'options
';
1944 if ($line =~ m/^\[group\s+(\S+)\]\s*$/i) {
1945 $section = 'groups
';
1950 if ($line =~ m/^\[rules\]$/i) {
1955 if ($line =~ m/^\[ipset\s+(\S+)\]\s*$/i) {
1962 warn "$prefix: skip line - no section\n";
1966 if ($section eq 'options
') {
1968 my ($opt, $value) = parse_clusterfw_option($line);
1969 $res->{options}->{$opt} = $value;
1971 warn "$prefix: $@" if $@;
1972 } elsif ($section eq 'rules
') {
1974 eval { $rule = parse_fw_rule($line, 1, 1); };
1976 warn "$prefix: $err";
1979 push @{$res->{$section}}, $rule;
1980 } elsif ($section eq 'groups
') {
1982 eval { $rule = parse_fw_rule($line, 0, 0); };
1984 warn "$prefix: $err";
1987 push @{$res->{$section}->{$group}}, $rule;
1988 } elsif ($section eq 'ipset
') {
1990 $line =~ m/^(\!)?\s*((\d+)\.(\d+)\.(\d+)\.(\d+)(\/(\d+))?)/;
1995 warn "$prefix: $line is not an valid ip address\n";
1998 if (!Net::IP->new($ip)) {
1999 warn "$prefix: $line is not an valid ip address\n";
2004 if ($feature_ipset_nomatch) {
2005 push @{$res->{$section}->{$group}}, "$ip nomatch";
2007 warn "$prefix: ignore $line - nomatch not supported by kernel\n";
2010 push @{$res->{$section}->{$group}}, $ip;
2015 $res->{digest} = $digest->b64digest;
2020 my ($code, @param) = @_;
2024 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2031 sub read_local_vm_config {
2036 my $vmdata = { openvz => $openvz, qemu => $qemu };
2038 my $vmlist = PVE::Cluster::get_vmlist();
2039 return $vmdata if !$vmlist || !$vmlist->{ids};
2040 my $ids = $vmlist->{ids};
2042 foreach my $vmid (keys %$ids) {
2043 next if !$vmid; # skip VE0
2044 my $d = $ids->{$vmid};
2045 next if !$d->{node} || $d->{node} ne $nodename;
2046 next if !$d->{type};
2047 if ($d->{type} eq 'openvz
') {
2048 if ($have_pve_manager) {
2049 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2050 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2051 $openvz->{$vmid} = $conf;
2054 } elsif ($d->{type} eq 'qemu
') {
2055 if ($have_qemu_server) {
2056 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2057 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2058 $qemu->{$vmid} = $conf;
2067 sub load_vmfw_conf {
2072 my $filename = "/etc/pve/firewall/$vmid.fw";
2073 if (my $fh = IO::File->new($filename, O_RDONLY)) {
2074 $vmfw_conf = parse_vm_fw_rules($filename, $fh);
2080 my $format_rules = sub {
2081 my ($rules, $need_iface) = @_;
2085 foreach my $rule (@$rules) {
2086 if ($rule->{type} eq 'in' || $rule->{type} eq 'out
') {
2087 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2088 $raw .= uc($rule->{type});
2089 if ($rule->{macro}) {
2090 $raw .= " $rule->{macro}($rule->{action})";
2092 $raw .= " " . $rule->{action};
2094 $raw .= " " . ($rule->{iface} || '-') if $need_iface;
2095 $raw .= " " . ($rule->{source} || '-');
2096 $raw .= " " . ($rule->{dest} || '-');
2097 $raw .= " " . ($rule->{proto} || '-');
2098 $raw .= " " . ($rule->{dport} || '-');
2099 $raw .= " " . ($rule->{sport} || '-');
2100 $raw .= " # " . encode('utf8
', $rule->{comment})
2101 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2104 die "implement me '$rule->{type
}'";
2111 my $format_options = sub {
2116 $raw .= "[OPTIONS]\n\n";
2117 foreach my $opt (keys %$options) {
2118 $raw .= "$opt: $options->{$opt}\n";
2125 sub save_vmfw_conf {
2126 my ($vmid, $vmfw_conf) = @_;
2130 my $options = $vmfw_conf->{options};
2131 $raw .= &$format_options($options) if scalar(keys %$options);
2133 my $rules = $vmfw_conf->{rules};
2134 if (scalar(@$rules)) {
2135 $raw .= "[RULES]\n\n";
2136 $raw .= &$format_rules($rules, 1);
2140 my $filename = "/etc/pve/firewall/$vmid.fw";
2141 PVE::Tools::file_set_contents($filename, $raw);
2144 sub read_vm_firewall_configs {
2146 my $vmfw_configs = {};
2148 foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
2149 my $vmfw_conf = load_vmfw_conf($vmid);
2150 next if !$vmfw_conf->{options}; # skip if file does not exists
2151 $vmfw_configs->{$vmid} = $vmfw_conf;
2154 return $vmfw_configs;
2157 sub get_option_log_level {
2158 my ($options, $k) = @_;
2160 my $v = $options->{$k};
2161 $v = $default_log_level if !defined($v);
2163 return undef if $v eq '' || $v eq 'nolog
';
2165 $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2167 return $v if ($v >= 0) && ($v <= 7);
2169 warn "unknown log level ($k = '$v')\n";
2174 sub generate_std_chains {
2175 my ($ruleset, $options) = @_;
2177 my $loglevel = get_option_log_level($options, 'smurf_log_level
');
2179 # same as shorewall smurflog.
2180 my $chain = 'PVEFW-smurflog
';
2182 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2183 push @{$pve_std_chains->{$chain}}, "-j DROP";
2185 # same as shorewall logflags action.
2186 $loglevel = get_option_log_level($options, 'tcp_flags_log_level
');
2187 $chain = 'PVEFW-logflags
';
2188 # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2189 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2190 push @{$pve_std_chains->{$chain}}, "-j DROP";
2192 foreach my $chain (keys %$pve_std_chains) {
2193 ruleset_create_chain($ruleset, $chain);
2194 foreach my $rule (@{$pve_std_chains->{$chain}}) {
2196 ruleset_generate_rule($ruleset, $chain, $rule);
2198 ruleset_addrule($ruleset, $chain, $rule);
2204 sub generate_ipset_chains {
2205 my ($ipset_ruleset, $fw_conf) = @_;
2207 foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2208 generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset});
2212 sub generate_ipset {
2213 my ($ipset_ruleset, $name, $options) = @_;
2215 my $hashsize = scalar(@$options);
2216 if ($hashsize <= 64) {
2219 $hashsize = round_powerof2($hashsize);
2222 push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
2224 foreach my $ip (@$options) {
2225 push @{$ipset_ruleset->{$name}}, "add $name $ip";
2229 sub round_powerof2 {
2233 $int |= $int >> $_ foreach (1,2,4,8,16);
2237 sub save_pvefw_status {
2240 die "unknown status '$status' - internal error"
2241 if $status !~ m/^(stopped|active)$/;
2243 mkdir dirname($pve_fw_status_filename);
2244 PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
2247 sub read_pvefw_status {
2249 my $status = 'unknown
';
2251 return 'stopped
' if ! -f $pve_fw_status_filename;
2254 $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
2261 # fixme: move to pve-common PVE::ProcFSTools
2262 sub read_proc_net_route {
2263 my $filename = "/proc/net/route";
2267 my $fh = IO::File->new ($filename, "r");
2268 return $res if !$fh;
2270 my $int_to_quad = sub {
2271 return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
2274 while (defined(my $line = <$fh>)) {
2275 next if $line =~/^Iface\s+Destination/; # skip head
2276 my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
2277 push @{$res->{$iface}}, {
2278 dest => &$int_to_quad(hex($dest)),
2279 gateway => &$int_to_quad(hex($gateway)),
2280 mask => &$int_to_quad(hex($mask)),
2289 sub load_clusterfw_conf {
2291 my $cluster_conf = {};
2292 if (my $fh = IO::File->new($clusterfw_conf_filename, O_RDONLY)) {
2293 $cluster_conf = parse_cluster_fw_rules($clusterfw_conf_filename, $fh);
2296 return $cluster_conf;
2299 sub save_clusterfw_conf {
2300 my ($cluster_conf) = @_;
2304 my $options = $cluster_conf->{options};
2305 $raw .= &$format_options($options) if scalar(keys %$options);
2309 my $rules = $cluster_conf->{rules};
2310 if (scalar(@$rules)) {
2311 $raw .= "[RULES]\n\n";
2312 $raw .= &$format_rules($rules, 1);
2316 foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2317 my $rules = $cluster_conf->{groups}->{$group};
2318 $raw .= "[group $group]\n\n";
2319 $raw .= &$format_rules($rules, 0);
2323 PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2326 sub load_hostfw_conf {
2328 my $hostfw_conf = {};
2329 if (my $fh = IO::File->new($hostfw_conf_filename, O_RDONLY)) {
2330 $hostfw_conf = parse_host_fw_rules($hostfw_conf_filename, $fh);
2332 return $hostfw_conf;
2335 sub save_hostfw_conf {
2336 my ($hostfw_conf) = @_;
2340 my $options = $hostfw_conf->{options};
2341 $raw .= &$format_options($options) if scalar(keys %$options);
2343 my $rules = $hostfw_conf->{rules};
2344 if (scalar(@$rules)) {
2345 $raw .= "[RULES]\n\n";
2346 $raw .= &$format_rules($rules, 1);
2350 PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2354 my $vmdata = read_local_vm_config();
2355 my $vmfw_configs = read_vm_firewall_configs($vmdata);
2357 my $routing_table = read_proc_net_route();
2359 my $cluster_conf = load_clusterfw_conf();
2361 my $ipset_ruleset = {};
2362 generate_ipset_chains($ipset_ruleset, $cluster_conf);
2366 ruleset_create_chain($ruleset, "PVEFW-INPUT");
2367 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2369 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2371 my $hostfw_conf = load_hostfw_conf();
2372 my $hostfw_options = $hostfw_conf->{options} || {};
2374 generate_std_chains($ruleset, $hostfw_options);
2376 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2378 enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
2380 # generate firewall rules for QEMU VMs
2381 foreach my $vmid (keys %{$vmdata->{qemu}}) {
2382 my $conf = $vmdata->{qemu}->{$vmid};
2383 my $vmfw_conf = $vmfw_configs->{$vmid};
2384 next if !$vmfw_conf;
2385 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2387 foreach my $netid (keys %$conf) {
2388 next if $netid !~ m/^net(\d+)$/;
2389 my $net = PVE::QemuServer::parse_net($conf->{$netid});
2391 my $iface = "tap${vmid}i$1";
2393 my $bridge = $net->{bridge};
2394 next if !$bridge; # fixme: ?
2396 $bridge .= "v$net->{tag}" if $net->{tag};
2398 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2400 my $macaddr = $net->{macaddr};
2401 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2402 $vmfw_conf, $vmid, $bridge, 'IN
');
2403 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2404 $vmfw_conf, $vmid, $bridge, 'OUT
');
2408 # generate firewall rules for OpenVZ containers
2409 foreach my $vmid (keys %{$vmdata->{openvz}}) {
2410 my $conf = $vmdata->{openvz}->{$vmid};
2412 my $vmfw_conf = $vmfw_configs->{$vmid};
2413 next if !$vmfw_conf;
2414 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2416 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2417 my $ip = $conf->{ip_address}->{value};
2418 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN
');
2419 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT
');
2422 if ($conf->{netif} && $conf->{netif}->{value}) {
2423 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2424 foreach my $netid (keys %$netif) {
2425 my $d = $netif->{$netid};
2426 my $bridge = $d->{bridge};
2428 warn "no bridge device for CT $vmid iface '$netid'\n";
2432 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2434 my $macaddr = $d->{mac};
2435 my $iface = $d->{host_ifname};
2436 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2437 $vmfw_conf, $vmid, $bridge, 'IN
');
2438 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2439 $vmfw_conf, $vmid, $bridge, 'OUT
');
2444 if($hostfw_options->{optimize}){
2446 my $accept = ruleset_chain_exist($ruleset, "PVEFW-IPS") ? "PVEFW-IPS" : "ACCEPT";
2447 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
2448 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate INVALID -j DROP");
2451 # fixme: what log level should we use here?
2452 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2454 # fixme: should we really block inter-bridge traffic?
2456 # always allow traffic from containers?
2457 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN");
2459 # disable interbridge routing
2460 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop");
2461 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop");
2462 ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-o vmbr+");
2463 ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-i vmbr+");
2464 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP");
2465 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP");
2467 return wantarray ? ($ruleset, $hostfw_conf, $ipset_ruleset) : $ruleset;
2470 sub get_ruleset_status {
2471 my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2473 my $statushash = {};
2475 foreach my $chain (sort keys %$ruleset) {
2476 my $sig = &$digest_fn($ruleset->{$chain});
2478 $statushash->{$chain}->{sig} = $sig;
2480 my $oldsig = $active_chains->{$chain};
2481 if (!defined($oldsig)) {
2482 $statushash->{$chain}->{action} = 'create
';
2484 if ($oldsig eq $sig) {
2485 $statushash->{$chain}->{action} = 'exists';
2487 $statushash->{$chain}->{action} = 'update
';
2490 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2491 foreach my $cmd (@{$ruleset->{$chain}}) {
2492 print "\t$cmd\n" if $verbose;
2496 foreach my $chain (sort keys %$active_chains) {
2497 if (!defined($ruleset->{$chain})) {
2498 my $sig = $active_chains->{$chain};
2499 $statushash->{$chain}->{action} = 'delete';
2500 $statushash->{$chain}->{sig} = $sig;
2501 print "delete $chain ($sig)\n" if $verbose;
2508 sub print_sig_rule {
2509 my ($chain, $sig) = @_;
2511 # We just use this to store a SHA1 checksum used to detect changes
2512 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2515 sub get_ruleset_cmdlist {
2516 my ($ruleset, $verbose) = @_;
2518 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2520 my ($active_chains, $hooks) = iptables_get_chains();
2521 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2523 # create missing chains first
2524 foreach my $chain (sort keys %$ruleset) {
2525 my $stat = $statushash->{$chain};
2526 die "internal error" if !$stat;
2527 next if $stat->{action} ne 'create
';
2529 $cmdlist .= ":$chain - [0:0]\n";
2532 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2533 if (!$hooks->{$h}) {
2534 $cmdlist .= "-A $h -j PVEFW-$h\n";
2538 foreach my $chain (sort keys %$ruleset) {
2539 my $stat = $statushash->{$chain};
2540 die "internal error" if !$stat;
2542 if ($stat->{action
} eq 'update' || $stat->{action
} eq 'create') {
2543 $cmdlist .= "-F $chain\n";
2544 foreach my $cmd (@{$ruleset->{$chain}}) {
2545 $cmdlist .= "$cmd\n";
2547 $cmdlist .= print_sig_rule
($chain, $stat->{sig
});
2548 } elsif ($stat->{action
} eq 'delete') {
2549 die "internal error"; # this should not happen
2550 } elsif ($stat->{action
} eq 'exists') {
2553 die "internal error - unknown status '$stat->{action}'";
2557 foreach my $chain (keys %$statushash) {
2558 next if $statushash->{$chain}->{action
} ne 'delete';
2559 $cmdlist .= "-F $chain\n";
2561 foreach my $chain (keys %$statushash) {
2562 next if $statushash->{$chain}->{action
} ne 'delete';
2563 next if $chain eq 'PVEFW-INPUT';
2564 next if $chain eq 'PVEFW-OUTPUT';
2565 next if $chain eq 'PVEFW-FORWARD';
2566 $cmdlist .= "-X $chain\n";
2569 my $changes = $cmdlist ne "*filter\n" ?
1 : 0;
2571 $cmdlist .= "COMMIT\n";
2573 return wantarray ?
($cmdlist, $changes) : $cmdlist;
2576 sub get_ipset_cmdlist
{
2577 my ($ruleset, $verbose) = @_;
2581 my $delete_cmdlist = "";
2583 my $active_chains = ipset_get_chains
();
2584 my $statushash = get_ruleset_status
($ruleset, $active_chains, \
&ipset_chain_digest
, $verbose);
2586 foreach my $chain (sort keys %$ruleset) {
2587 my $stat = $statushash->{$chain};
2588 die "internal error" if !$stat;
2590 if ($stat->{action
} eq 'create') {
2591 foreach my $cmd (@{$ruleset->{$chain}}) {
2592 $cmdlist .= "$cmd\n";
2596 if ($stat->{action
} eq 'update') {
2597 my $chain_swap = $chain."_swap";
2599 foreach my $cmd (@{$ruleset->{$chain}}) {
2600 $cmd =~ s/$chain/$chain_swap/;
2601 $cmdlist .= "$cmd\n";
2603 $cmdlist .= "swap $chain_swap $chain\n";
2604 $cmdlist .= "flush $chain_swap\n";
2605 $cmdlist .= "destroy $chain_swap\n";
2610 foreach my $chain (keys %$statushash) {
2611 next if $statushash->{$chain}->{action
} ne 'delete';
2613 $delete_cmdlist .= "flush $chain\n";
2614 $delete_cmdlist .= "destroy $chain\n";
2617 my $changes = ($cmdlist || $delete_cmdlist) ?
1 : 0;
2619 return ($cmdlist, $delete_cmdlist, $changes);
2623 my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
2625 enable_bridge_firewall
();
2627 update_nf_conntrack_max
($hostfw_conf);
2629 my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
2630 get_ipset_cmdlist
($ipset_ruleset, undef, $verbose);
2632 my ($cmdlist, $changes) = get_ruleset_cmdlist
($ruleset, $verbose);
2635 if ($ipset_changes) {
2636 print "ipset changes:\n";
2637 print $ipset_create_cmdlist if $ipset_create_cmdlist;
2638 print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2642 print "iptables changes:\n";
2647 ipset_restore_cmdlist
($ipset_create_cmdlist);
2649 iptables_restore_cmdlist
($cmdlist);
2651 ipset_restore_cmdlist
($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2653 # test: re-read status and check if everything is up to date
2654 my $active_chains = iptables_get_chains
();
2655 my $statushash = get_ruleset_status
($ruleset, $active_chains, \
&iptables_chain_digest
, 0);
2658 foreach my $chain (sort keys %$ruleset) {
2659 my $stat = $statushash->{$chain};
2660 if ($stat->{action
} ne 'exists') {
2661 warn "unable to update chain '$chain'\n";
2666 die "unable to apply firewall changes\n" if $errors;
2669 sub update_nf_conntrack_max
{
2670 my ($hostfw_conf) = @_;
2672 my $max = 65536; # reasonable default
2674 my $options = $hostfw_conf->{options
} || {};
2676 if (defined($options->{nf_conntrack_max
}) && ($options->{nf_conntrack_max
} > $max)) {
2677 $max = $options->{nf_conntrack_max
};
2678 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2681 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2682 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2684 my $current = int(PVE
::Tools
::file_read_firstline
($filename_nf_conntrack_max) || $max);
2686 if ($current != $max) {
2687 my $hashsize = int($max/4);
2688 PVE
::ProcFSTools
::write_proc_entry
($filename_hashsize, $hashsize);
2689 PVE
::ProcFSTools
::write_proc_entry
($filename_nf_conntrack_max, $max);
2693 sub remove_pvefw_chains
{
2695 my ($chash, $hooks) = iptables_get_chains
();
2696 my $cmdlist = "*filter\n";
2698 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2700 $cmdlist .= "-D $h -j PVEFW-$h\n";
2704 foreach my $chain (keys %$chash) {
2705 $cmdlist .= "-F $chain\n";
2708 foreach my $chain (keys %$chash) {
2709 $cmdlist .= "-X $chain\n";
2711 $cmdlist .= "COMMIT\n";
2713 iptables_restore_cmdlist
($cmdlist);
2717 my ($start, $verbose) = @_;
2720 my $status = read_pvefw_status
();
2722 my ($ruleset, $hostfw_conf, $ipset_ruleset) = compile
();
2724 if ($start || $status eq 'active') {
2726 save_pvefw_status
('active') if ($status ne 'active');
2728 apply_ruleset
($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
2730 print "Firewall not active (status = $status)\n" if $verbose;