9 use PVE
::Exception
qw(raise raise_param_exc);
10 use PVE
::JSONSchema
qw(get_standard_option);
13 use PVE
::Tools
qw($IPV4RE);
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 $have_pve_manager = 1;
38 PVE
::JSONSchema
::register_format
('IPv4orCIDR', \
&pve_verify_ipv4_or_cidr
);
39 sub pve_verify_ipv4_or_cidr
{
40 my ($cidr, $noerr) = @_;
42 if ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
43 return $cidr if Net
::IP-
>new($cidr);
44 return undef if $noerr;
45 die Net
::IP
::Error
() . "\n";
47 return undef if $noerr;
48 die "value does not look like a valid IP address or CIDR network\n";
52 my $feature_ipset_nomatch = 0;
54 my (undef, undef, $release) = POSIX
::uname
();
55 if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
56 my ($major, $minor) = ($1, $2);
57 $feature_ipset_nomatch = 1 if ($major > 3) ||
58 ($major == 3 && $minor >= 7);
65 my $nodename = PVE
::INotify
::nodename
();
67 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
68 my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
70 my $default_log_level = 'info';
72 my $log_level_hash = {
83 # imported/converted from: /usr/share/shorewall/macro.*
87 { action
=> 'PARAM', proto
=> 'udp', dport
=> '10080' },
88 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10080' },
91 "Auth (identd) traffic",
92 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '113' },
95 "Border Gateway Protocol traffic",
96 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '179' },
99 "BitTorrent traffic for BitTorrent 3.1 and earlier",
100 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6889' },
101 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
104 "BitTorrent traffic for BitTorrent 3.2 and later",
105 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6999' },
106 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
109 "Concurrent Versions System pserver traffic",
110 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2401' },
113 "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
114 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1494' },
115 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1604' },
116 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2598' },
119 "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
120 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3689' },
121 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3689' },
124 "Distributed Checksum Clearinghouse spam filtering mechanism",
125 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6277' },
128 "Forwarded DHCP traffic (bidirectional)",
129 { action
=> 'PARAM', proto
=> 'udp', dport
=> '67:68', sport
=> '67:68' },
130 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '67:68', sport
=> '67:68' },
133 "Domain Name System traffic (upd and tcp)",
134 { action
=> 'PARAM', proto
=> 'udp', dport
=> '53' },
135 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '53' },
138 "Distributed Compiler service",
139 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3632' },
142 "File Transfer Protocol",
143 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '21' },
146 "Finger protocol (RFC 742)",
147 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '79' },
150 "GNUnet secure peer-to-peer networking traffic",
151 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2086' },
152 { action
=> 'PARAM', proto
=> 'udp', dport
=> '2086' },
153 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1080' },
154 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1080' },
157 "Generic Routing Encapsulation tunneling protocol (bidirectional)",
158 { action
=> 'PARAM', proto
=> '47' },
159 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '47' },
162 "Git distributed revision control traffic",
163 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9418' },
166 "OpenPGP HTTP keyserver protocol traffic",
167 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '11371' },
170 "Hypertext Transfer Protocol (WWW)",
171 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
174 "Hypertext Transfer Protocol (WWW) over SSL",
175 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
178 "Internet Cache Protocol V2 (Squid) traffic",
179 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3130' },
182 "AOL Instant Messenger traffic",
183 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5190' },
186 "Internet Message Access Protocol",
187 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '143' },
190 "Internet Message Access Protocol over SSL",
191 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '993' },
194 "IPIP capsulation traffic (bidirectional)",
195 { action
=> 'PARAM', proto
=> '94' },
196 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '94' },
199 "IPsec traffic (bidirectional)",
200 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
201 { action
=> 'PARAM', proto
=> '50' },
202 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '500', sport
=> '500' },
203 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '50' },
206 "IPsec authentication (AH) traffic (bidirectional)",
207 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
208 { action
=> 'PARAM', proto
=> '51' },
209 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '500', sport
=> '500' },
210 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '51' },
213 "IPsec traffic and Nat-Traversal (bidirectional)",
214 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500' },
215 { action
=> 'PARAM', proto
=> 'udp', dport
=> '4500' },
216 { action
=> 'PARAM', proto
=> '50' },
217 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '500' },
218 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '4500' },
219 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '50' },
222 "Internet Relay Chat traffic",
223 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6667' },
226 "HP Jetdirect printing",
227 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9100' },
230 "Layer 2 Tunneling Protocol traffic",
231 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1701' },
232 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '1701' },
235 "Lightweight Directory Access Protocol traffic",
236 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '389' },
239 "Secure Lightweight Directory Access Protocol traffic",
240 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '636' },
243 "Microsoft Notification Protocol",
244 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1863' },
247 "Microsoft SQL Server",
248 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1433' },
251 "Mail traffic (SMTP, SMTPS, Submission)",
252 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
253 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
254 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
257 "Munin networked resource monitoring traffic",
258 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '4949' },
262 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3306' },
265 "NNTP traffic (Usenet).",
266 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '119' },
269 "Encrypted NNTP traffic (Usenet)",
270 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '563' },
273 "Network Time Protocol (ntpd)",
274 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
277 "Bi-directional NTP (for NTP peers)",
278 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
279 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '123' },
282 "OSPF multicast traffic",
283 { action
=> 'PARAM', proto
=> '89' },
287 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1194' },
290 "Symantec PCAnywere (tm)",
291 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5632' },
292 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5631' },
296 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '110' },
299 "Encrypted POP3 traffic",
300 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '995' },
303 "Point-to-Point Tunneling Protocol",
304 { action
=> 'PARAM', proto
=> '47' },
305 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> '47' },
306 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1723' },
310 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
314 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5432' },
317 "Line Printer protocol printing",
318 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '515' },
321 "Microsoft Remote Desktop Protocol traffic",
322 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3389' },
325 "Routing Information Protocol (bidirectional)",
326 { action
=> 'PARAM', proto
=> 'udp', dport
=> '520' },
327 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '520' },
330 "BIND remote management protocol",
331 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '953' },
334 "Razor Antispam System",
335 { action
=> 'ACCEPT', proto
=> 'tcp', dport
=> '2703' },
338 "Remote time retrieval (rdate)",
339 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
343 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '873' },
346 "SANE network scanning",
347 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6566' },
350 "Microsoft SMB traffic",
351 { action
=> 'PARAM', proto
=> 'udp', dport
=> '135,445' },
352 { action
=> 'PARAM', proto
=> 'udp', dport
=> '137:139' },
353 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
354 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '135,139,445' },
357 "Microsoft SMB traffic (bidirectional)",
358 { action
=> 'PARAM', proto
=> 'udp', dport
=> '135,445' },
359 { action
=> 'PARAM', proto
=> 'udp', dport
=> '137:139' },
360 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
361 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '135,139,445' },
362 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '135,445' },
363 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '137:139' },
364 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
365 { action
=> 'PARAM', source
=> 'DEST', dest
=> 'SOURCE', proto
=> 'tcp', dport
=> '135,139,445' },
368 "Samba Web Administration Tool",
369 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '901' },
372 "Simple Mail Transfer Protocol",
373 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
376 "Encrypted Simple Mail Transfer Protocol",
377 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
380 "Simple Network Management Protocol",
381 { action
=> 'PARAM', proto
=> 'udp', dport
=> '161:162' },
382 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '161' },
385 "Spam Assassin SPAMD traffic",
386 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '783' },
389 "Secure shell traffic",
390 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '22' },
393 "Subversion server (svnserve)",
394 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3690' },
397 "SixXS IPv6 Deployment and Tunnel Broker",
398 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3874' },
399 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3740' },
400 { action
=> 'PARAM', proto
=> '41' },
401 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5072,8374' },
404 "Squid web proxy traffic",
405 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3128' },
408 "Mail message submission traffic",
409 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
412 "Syslog protocol (RFC 5424) traffic",
413 { action
=> 'PARAM', proto
=> 'udp', dport
=> '514' },
414 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '514' },
417 "Trivial File Transfer Protocol traffic",
418 { action
=> 'PARAM', proto
=> 'udp', dport
=> '69' },
422 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '23' },
426 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '992' },
429 "RFC 868 Time protocol",
430 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
433 "Traceroute (for up to 30 hops) traffic",
434 { action
=> 'PARAM', proto
=> 'udp', dport
=> '33434:33524' },
435 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
438 "VNC traffic for VNC display's 0 - 9",
439 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5900:5909' },
442 "VNC traffic from Vncservers to Vncviewers in listen mode",
443 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5500' },
446 "WWW traffic (HTTP and HTTPS)",
447 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
448 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
451 "Web Cache/Proxy traffic (port 8080)",
452 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '8080' },
456 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10000' },
459 "Whois (nicname, RFC 3912) traffic",
460 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '43' },
464 my $pve_fw_parsed_macros;
465 my $pve_fw_macro_descr;
466 my $pve_fw_preferred_macro_names = {};
468 my $pve_std_chains = {
469 'PVEFW-SET-ACCEPT-MARK' => [
470 "-j MARK --set-mark 1",
472 'PVEFW-DropBroadcast' => [
473 # same as shorewall 'Broadcast'
474 # simply DROP BROADCAST/MULTICAST/ANYCAST
475 # we can use this to reduce logging
476 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
477 { action
=> 'DROP', dsttype
=> 'MULTICAST' },
478 { action
=> 'DROP', dsttype
=> 'ANYCAST' },
479 { action
=> 'DROP', dest
=> '224.0.0.0/4' },
482 # same as shorewall 'reject'
483 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
484 { action
=> 'DROP', source
=> '224.0.0.0/4' },
485 { action
=> 'DROP', proto
=> 'icmp' },
486 "-p tcp -j REJECT --reject-with tcp-reset",
487 "-p udp -j REJECT --reject-with icmp-port-unreachable",
488 "-p icmp -j REJECT --reject-with icmp-host-unreachable",
489 "-j REJECT --reject-with icmp-host-prohibited",
492 # same as shorewall 'Drop', which is equal to DROP,
493 # but REJECT/DROP some packages to reduce logging,
494 # and ACCEPT critical ICMP types
495 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
496 # we are not interested in BROADCAST/MULTICAST/ANYCAST
497 { action
=> 'PVEFW-DropBroadcast' },
498 # ACCEPT critical ICMP types
499 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
500 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
501 # Drop packets with INVALID state
502 "-m conntrack --ctstate INVALID -j DROP",
503 # Drop Microsoft SMB noise
504 { action
=> 'DROP', proto
=> 'udp', dport
=> '135,445', nbdport
=> 2 },
505 { action
=> 'DROP', proto
=> 'udp', dport
=> '137:139'},
506 { action
=> 'DROP', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
507 { action
=> 'DROP', proto
=> 'tcp', dport
=> '135,139,445', nbdport
=> 3 },
508 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
509 # Drop new/NotSyn traffic so that it doesn't get logged
510 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
512 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
515 # same as shorewall 'Reject', which is equal to Reject,
516 # but REJECT/DROP some packages to reduce logging,
517 # and ACCEPT critical ICMP types
518 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
519 # we are not interested in BROADCAST/MULTICAST/ANYCAST
520 { action
=> 'PVEFW-DropBroadcast' },
521 # ACCEPT critical ICMP types
522 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
523 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
524 # Drop packets with INVALID state
525 "-m conntrack --ctstate INVALID -j DROP",
526 # Drop Microsoft SMB noise
527 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '135,445', nbdport
=> 2 },
528 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '137:139'},
529 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
530 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '135,139,445', nbdport
=> 3 },
531 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
532 # Drop new/NotSyn traffic so that it doesn't get logged
533 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
535 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
537 'PVEFW-tcpflags' => [
538 # same as shorewall tcpflags action.
539 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
540 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
541 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
542 "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
543 "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
544 "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
547 # same as shorewall smurfs action
548 # Filter packets for smurfs (packets with a broadcast address as the source).
549 "-s 0.0.0.0/32 -j RETURN",
550 "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
551 "-s 224.0.0.0/4 -g PVEFW-smurflog",
555 # iptables -p icmp -h
556 my $icmp_type_names = {
559 'destination-unreachable' => 1,
560 'network-unreachable' => 1,
561 'host-unreachable' => 1,
562 'protocol-unreachable' => 1,
563 'port-unreachable' => 1,
564 'fragmentation-needed' => 1,
565 'source-route-failed' => 1,
566 'network-unknown' => 1,
568 'network-prohibited' => 1,
569 'host-prohibited' => 1,
570 'TOS-network-unreachable' => 1,
571 'TOS-host-unreachable' => 1,
572 'communication-prohibited' => 1,
573 'host-precedence-violation' => 1,
574 'precedence-cutoff' => 1,
575 'source-quench' => 1,
577 'network-redirect' => 1,
578 'host-redirect' => 1,
579 'TOS-network-redirect' => 1,
580 'TOS-host-redirect' => 1,
582 'router-advertisement' => 1,
583 'router-solicitation' => 1,
584 'time-exceeded' => 1,
585 'ttl-zero-during-transit' => 1,
586 'ttl-zero-during-reassembly' => 1,
587 'parameter-problem' => 1,
588 'ip-header-bad' => 1,
589 'required-option-missing' => 1,
590 'timestamp-request' => 1,
591 'timestamp-reply' => 1,
592 'address-mask-request' => 1,
593 'address-mask-reply' => 1,
596 sub init_firewall_macros
{
598 $pve_fw_parsed_macros = {};
600 foreach my $k (keys %$pve_fw_macros) {
601 my $lc_name = lc($k);
602 my $macro = $pve_fw_macros->{$k};
603 if (!ref($macro->[0])) {
604 $pve_fw_macro_descr->{$k} = shift @$macro;
606 $pve_fw_preferred_macro_names->{$lc_name} = $k;
607 $pve_fw_parsed_macros->{$k} = $macro;
611 init_firewall_macros
();
614 return wantarray ?
($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
619 sub get_etc_services
{
621 return $etc_services if $etc_services;
623 my $filename = "/etc/services";
625 my $fh = IO
::File-
>new($filename, O_RDONLY
);
627 warn "unable to read '$filename' - $!\n";
633 while (my $line = <$fh>) {
635 next if $line =~m/^#/;
636 next if ($line =~m/^\s*$/);
638 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
639 $services->{byid
}->{$2}->{name
} = $1;
640 $services->{byid
}->{$2}->{port
} = $2;
641 $services->{byid
}->{$2}->{$3} = 1;
642 $services->{byname
}->{$1} = $services->{byid
}->{$2};
648 $etc_services = $services;
651 return $etc_services;
656 sub get_etc_protocols
{
657 return $etc_protocols if $etc_protocols;
659 my $filename = "/etc/protocols";
661 my $fh = IO
::File-
>new($filename, O_RDONLY
);
663 warn "unable to read '$filename' - $!\n";
669 while (my $line = <$fh>) {
671 next if $line =~m/^#/;
672 next if ($line =~m/^\s*$/);
674 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
675 $protocols->{byid
}->{$2}->{name
} = $1;
676 $protocols->{byname
}->{$1} = $protocols->{byid
}->{$2};
682 $etc_protocols = $protocols;
684 return $etc_protocols;
687 sub parse_address_list
{
690 return if $str !~ m/^(\+)(\S+)$/; # ipset ref
694 foreach my $elem (split(/,/, $str)) {
696 if (!Net
::IP-
>new($elem)) {
697 my $err = Net
::IP
::Error
();
698 die "invalid IP address: $err\n";
700 $iprange = 1 if $elem =~ m/-/;
703 die "you can use a range in a list\n" if $iprange && $count > 1;
706 sub parse_port_name_number_or_range
{
709 my $services = PVE
::Firewall
::get_etc_services
();
713 foreach my $item (split(/,/, $str)) {
715 if ($item =~ m/^(\d+):(\d+)$/) {
716 my ($port1, $port2) = ($1, $2);
717 die "invalid port '$port1'\n" if $port1 > 65535;
718 die "invalid port '$port2'\n" if $port2 > 65535;
719 } elsif ($item =~ m/^(\d+)$/) {
721 die "invalid port '$port'\n" if $port > 65535;
723 if ($icmp_type_names->{$item}) {
726 die "invalid port '$item'\n" if !$services->{byname
}->{$item};
731 die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
736 PVE
::JSONSchema
::register_format
('pve-fw-port-spec', \
&pve_fw_verify_port_spec
);
737 sub pve_fw_verify_port_spec
{
740 parse_port_name_number_or_range
($portstr);
745 PVE
::JSONSchema
::register_format
('pve-fw-v4addr-spec', \
&pve_fw_verify_v4addr_spec
);
746 sub pve_fw_verify_v4addr_spec
{
749 parse_address_list
($list);
754 PVE
::JSONSchema
::register_format
('pve-fw-protocol-spec', \
&pve_fw_verify_protocol_spec
);
755 sub pve_fw_verify_protocol_spec
{
758 my $protocols = get_etc_protocols
();
760 die "unknown protocol '$proto'\n" if $proto &&
761 !(defined($protocols->{byname
}->{$proto}) ||
762 defined($protocols->{byid
}->{$proto}));
768 # helper function for API
770 my $rule_properties = {
772 description
=> "Update rule at position <pos>.",
786 enum
=> ['in', 'out', 'group'],
791 enum
=> ['ACCEPT', 'DROP', 'REJECT'],
798 iface
=> get_standard_option
('pve-iface', { optional
=> 1 }),
800 type
=> 'string', format
=> 'pve-fw-v4addr-spec',
804 type
=> 'string', format
=> 'pve-fw-v4addr-spec',
808 type
=> 'string', format
=> 'pve-fw-protocol-spec',
816 type
=> 'string', format
=> 'pve-fw-port-spec',
820 type
=> 'string', format
=> 'pve-fw-port-spec',
829 sub cleanup_fw_rule
{
830 my ($rule, $digest, $pos) = @_;
834 foreach my $k (keys %$rule) {
835 next if !$rule_properties->{$k};
837 next if !defined($v);
839 $r->{digest
} = $digest;
846 sub add_rule_properties
{
847 my ($properties) = @_;
849 foreach my $k (keys %$rule_properties) {
850 my $h = $rule_properties->{$k};
851 # copy data, so that we can modify later without side effects
852 foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
858 sub delete_rule_properties
{
859 my ($rule, $delete_str) = @_;
861 foreach my $opt (PVE
::Tools
::split_list
($delete_str)) {
862 raise_param_exc
({ 'delete' => "no such property ('$opt')"})
863 if !defined($rule_properties->{$opt});
864 raise_param_exc
({ 'delete' => "unable to delete required property '$opt'"})
865 if $opt eq 'type' || $opt eq 'action';
866 delete $rule->{$opt};
872 my $apply_macro = sub {
873 my ($macro_name, $param, $verify) = @_;
875 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
876 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
880 foreach my $templ (@$macro_rules) {
883 foreach my $k (keys %$templ) {
884 my $v = $templ->{$k};
887 $param_used->{$k} = 1;
888 } elsif ($v eq 'DEST') {
890 $param_used->{dest
} = 1;
891 } elsif ($v eq 'SOURCE') {
892 $v = $param->{source
};
893 $param_used->{source
} = 1;
897 my $msg = "missing parameter '$k' in macro '$macro_name'";
898 raise_param_exc
({ macro => $msg }) if $verify;
903 foreach my $k (keys %$param) {
904 next if $k eq 'macro';
905 next if !defined($param->{$k});
906 next if $param_used->{$k};
907 if (defined($rule->{$k})) {
908 if ($rule->{$k} ne $param->{$k}) {
909 my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
910 raise_param_exc
({ $k => $msg }) if $verify;
914 $rule->{$k} = $param->{$k};
924 my ($rule, $allow_groups) = @_;
926 my $type = $rule->{type
};
928 raise_param_exc
({ type
=> "missing property"}) if !$type;
929 raise_param_exc
({ action
=> "missing property"}) if !$rule->{action
};
931 if ($type eq 'in' || $type eq 'out') {
932 raise_param_exc
({ action
=> "unknown action '$rule->{action}'"})
933 if $rule->{action
} !~ m/^(ACCEPT|DROP|REJECT)$/;
934 } elsif ($type eq 'group') {
935 raise_param_exc
({ type
=> "security groups not allowed"})
937 raise_param_exc
({ action
=> "invalid characters in security group name"})
938 if $rule->{action
} !~ m/^[A-Za-z0-9_\-]+$/;
940 raise_param_exc
({ type
=> "unknown rule type '$type'"});
943 # fixme: verify $rule->{iface}?
945 if ($rule->{macro}) {
946 my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})};
947 raise_param_exc
({ macro => "unknown macro '$rule->{macro}'"}) if !$preferred_name;
948 $rule->{macro} = $preferred_name;
951 if ($rule->{dport
}) {
952 eval { parse_port_name_number_or_range
($rule->{dport
}); };
953 raise_param_exc
({ dport
=> $@ }) if $@;
956 if ($rule->{sport
}) {
957 eval { parse_port_name_number_or_range
($rule->{sport
}); };
958 raise_param_exc
({ sport
=> $@ }) if $@;
961 if ($rule->{source
}) {
962 eval { parse_address_list
($rule->{source
}); };
963 raise_param_exc
({ source
=> $@ }) if $@;
967 eval { parse_address_list
($rule->{dest
}); };
968 raise_param_exc
({ dest
=> $@ }) if $@;
971 if ($rule->{macro}) {
972 &$apply_macro($rule->{macro}, $rule, 1);
979 my ($rule, $param) = @_;
981 foreach my $k (keys %$rule_properties) {
982 if (defined(my $v = $param->{$k})) {
983 if ($v eq '' || $v eq '-') {
999 my $bridge_firewall_enabled = 0;
1001 sub enable_bridge_firewall
{
1003 return if $bridge_firewall_enabled; # only once
1005 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1006 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1008 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1009 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/ipv4/tcp_syncookies", "1");
1011 $bridge_firewall_enabled = 1;
1014 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1016 sub iptables_restore_cmdlist
{
1019 run_command
("/sbin/iptables-restore -n", input
=> $cmdlist);
1022 sub ipset_restore_cmdlist
{
1025 run_command
("/usr/sbin/ipset restore", input
=> $cmdlist);
1028 sub iptables_get_chains
{
1032 # check what chains we want to track
1033 my $is_pvefw_chain = sub {
1036 return 1 if $name =~ m/^PVEFW-\S+$/;
1038 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1040 return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1042 return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1044 return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT|IPS)$/;
1045 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1057 return if $line =~ m/^#/;
1058 return if $line =~ m/^\s*$/;
1060 if ($line =~ m/^\*(\S+)$/) {
1065 return if $table ne 'filter';
1067 if ($line =~ m/^:(\S+)\s/) {
1069 return if !&$is_pvefw_chain($chain);
1070 $res->{$chain} = "unknown";
1071 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1072 my ($chain, $sig) = ($1, $2);
1073 return if !&$is_pvefw_chain($chain);
1074 $res->{$chain} = $sig;
1075 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1078 # simply ignore the rest
1083 run_command
("/sbin/iptables-save", outfunc
=> $parser);
1085 return wantarray ?
($res, $hooks) : $res;
1088 sub iptables_chain_digest
{
1090 my $digest = Digest
::SHA-
>new('sha1');
1091 foreach my $rule (@$rules) { # order is important
1092 $digest->add($rule);
1094 return $digest->b64digest;
1097 sub ipset_chain_digest
{
1100 my $digest = Digest
::SHA-
>new('sha1');
1101 foreach my $rule (sort @$rules) { # note: sorted
1102 $digest->add($rule);
1104 return $digest->b64digest;
1107 sub ipset_get_chains
{
1115 return if $line =~ m/^#/;
1116 return if $line =~ m/^\s*$/;
1117 if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1119 $line =~ s/\s+$//; # delete trailing white space
1120 push @{$chains->{$chain}}, $line;
1122 # simply ignore the rest
1127 run_command
("/usr/sbin/ipset save", outfunc
=> $parser);
1129 # compute digest for each chain
1130 foreach my $chain (keys %$chains) {
1131 $res->{$chain} = ipset_chain_digest
($chains->{$chain});
1137 sub ruleset_generate_cmdstr
{
1138 my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1140 return if defined($rule->{enable
}) && !$rule->{enable
};
1142 die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1144 my $nbdport = defined($rule->{dport
}) ? parse_port_name_number_or_range
($rule->{dport
}) : 0;
1145 my $nbsport = defined($rule->{sport
}) ? parse_port_name_number_or_range
($rule->{sport
}) : 0;
1149 push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in
};
1150 push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out
};
1152 my $source = $rule->{source
};
1153 my $dest = $rule->{dest
};
1156 if ($source =~ m/^(\+)(\S+)$/) {
1157 die "no such ipset $2" if !$cluster_conf->{ipset
}->{$2};
1158 push @cmd, "-m set --match-set PVEFW-$2 src";
1160 } elsif ($source =~ m/\-/){
1161 push @cmd, "-m iprange --src-range $source";
1164 push @cmd, "-s $source";
1169 if ($dest =~ m/^(\+)(\S+)$/) {
1170 die "no such ipset $2" if !$cluster_conf->{ipset
}->{$2};
1171 push @cmd, "-m set --match-set PVEFW-$2 dst";
1173 } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1174 push @cmd, "-m iprange --dst-range $dest";
1177 push @cmd, "-s $dest";
1181 if ($rule->{proto
}) {
1182 push @cmd, "-p $rule->{proto}";
1185 $multiport++ if $nbdport > 1;
1186 $multiport++ if $nbsport > 1;
1188 push @cmd, "--match multiport" if $multiport;
1190 die "multiport: option '--sports' cannot be used together with '--dports'\n"
1191 if ($multiport == 2) && ($rule->{dport
} ne $rule->{sport
});
1193 if ($rule->{dport
}) {
1194 if ($rule->{proto
} && $rule->{proto
} eq 'icmp') {
1195 # Note: we use dport to store --icmp-type
1196 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport
}});
1197 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1200 if ($multiport == 2) {
1201 push @cmd, "--ports $rule->{dport}";
1203 push @cmd, "--dports $rule->{dport}";
1206 push @cmd, "--dport $rule->{dport}";
1211 if ($rule->{sport
}) {
1213 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1215 push @cmd, "--sport $rule->{sport}";
1218 } elsif ($rule->{dport
} || $rule->{sport
}) {
1219 warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport
};
1220 warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport
};
1223 push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype
};
1225 if (my $action = $rule->{action
}) {
1226 $action = $actions->{$action} if defined($actions->{$action});
1227 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1228 push @cmd, $goto ?
"-g $action" : "-j $action";
1231 return scalar(@cmd) ?
join(' ', @cmd) : undef;
1234 sub ruleset_generate_rule
{
1235 my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1239 if ($rule->{macro}) {
1240 $rules = &$apply_macro($rule->{macro}, $rule);
1245 foreach my $tmp (@$rules) {
1246 if (my $cmdstr = ruleset_generate_cmdstr
($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
1247 ruleset_addrule
($ruleset, $chain, $cmdstr);
1252 sub ruleset_generate_rule_insert
{
1253 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1255 die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1257 if (my $cmdstr = ruleset_generate_cmdstr
($ruleset, $chain, $rule, $actions, $goto)) {
1258 ruleset_insertrule
($ruleset, $chain, $cmdstr);
1262 sub ruleset_create_chain
{
1263 my ($ruleset, $chain) = @_;
1265 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1266 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1268 die "chain '$chain' already exists\n" if $ruleset->{$chain};
1270 $ruleset->{$chain} = [];
1273 sub ruleset_chain_exist
{
1274 my ($ruleset, $chain) = @_;
1276 return $ruleset->{$chain} ?
1 : undef;
1279 sub ruleset_addrule
{
1280 my ($ruleset, $chain, $rule) = @_;
1282 die "no such chain '$chain'\n" if !$ruleset->{$chain};
1284 push @{$ruleset->{$chain}}, "-A $chain $rule";
1287 sub ruleset_insertrule
{
1288 my ($ruleset, $chain, $rule) = @_;
1290 die "no such chain '$chain'\n" if !$ruleset->{$chain};
1292 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1295 sub get_log_rule_base
{
1296 my ($chain, $vmid, $msg, $loglevel) = @_;
1298 die "internal error - no log level" if !defined($loglevel);
1300 $vmid = 0 if !defined($vmid);
1302 # Note: we use special format for prefix to pass further
1303 # info to log daemon (VMID, LOGVELEL and CHAIN)
1305 return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1308 sub ruleset_addlog {
1309 my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1311 return if !defined($loglevel);
1313 my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1315 $logrule = "$rule $logrule" if defined($rule);
1317 ruleset_addrule($ruleset, $chain, $logrule)
1320 sub generate_bridge_chains {
1321 my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_;
1323 my $options = $hostfw_conf->{options} || {};
1325 die "error
: detected direct route to bridge
'$bridge'\n"
1326 if !$options->{allow_bridge_route} && $routing_table->{$bridge};
1328 if (!ruleset_chain_exist($ruleset, "$bridge-FW
")) {
1329 ruleset_create_chain($ruleset, "$bridge-FW
");
1330 ruleset_addrule($ruleset, "PVEFW-FORWARD
", "-o
$bridge -m physdev
--physdev-is-out
-j
$bridge-FW
");
1331 ruleset_addrule($ruleset, "PVEFW-FORWARD
", "-i
$bridge -m physdev
--physdev-is-in
-j
$bridge-FW
");
1334 if (!ruleset_chain_exist($ruleset, "$bridge-OUT
")) {
1335 ruleset_create_chain($ruleset, "$bridge-OUT
");
1336 ruleset_addrule($ruleset, "$bridge-FW
", "-m physdev
--physdev-is-in
-j
$bridge-OUT
");
1337 ruleset_insertrule($ruleset, "PVEFW-INPUT
", "-i
$bridge -m physdev
--physdev-is-in
-j
$bridge-OUT
");
1340 if (!ruleset_chain_exist($ruleset, "$bridge-IN
")) {
1341 ruleset_create_chain($ruleset, "$bridge-IN
");
1342 ruleset_addrule($ruleset, "$bridge-FW
", "-m physdev
--physdev-is-out
-j
$bridge-IN
");
1343 ruleset_addrule($ruleset, "$bridge-FW
", "-m mark
--mark
1 -j ACCEPT
");
1344 # accept traffic to unmanaged bridge ports
1345 ruleset_addrule($ruleset, "$bridge-FW
", "-m physdev
--physdev-is-out
-j ACCEPT
");
1349 sub ruleset_add_chain_policy {
1350 my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1352 if ($policy eq 'ACCEPT') {
1354 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1355 { ACCEPT => $accept_action});
1357 } elsif ($policy eq 'DROP') {
1359 ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop
");
1361 ruleset_addlog($ruleset, $chain, $vmid, "policy
$policy: ", $loglevel);
1363 ruleset_addrule($ruleset, $chain, "-j DROP
");
1364 } elsif ($policy eq 'REJECT') {
1365 ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject
");
1367 ruleset_addlog($ruleset, $chain, $vmid, "policy
$policy: ", $loglevel);
1369 ruleset_addrule($ruleset, $chain, "-g PVEFW-reject
");
1372 die "internal error
: unknown policy
'$policy'";
1376 sub ruleset_create_vm_chain {
1377 my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
1379 ruleset_create_chain($ruleset, $chain);
1380 my $accept = generate_nfqueue($options);
1382 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1383 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
,NEW
-j PVEFW-smurfs
");
1386 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1387 if ($direction eq 'OUT') {
1388 ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1389 proto => 'udp', sport => 68, dport => 67 });
1391 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1392 proto => 'udp', sport => 67, dport => 68 });
1396 if ($options->{tcpflags}) {
1397 ruleset_addrule($ruleset, $chain, "-p tcp
-j PVEFW-tcpflags
");
1400 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
-j DROP
");
1401 if ($direction eq 'OUT') {
1402 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
-g PVEFW-SET-ACCEPT-MARK
");
1404 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
-j
$accept");
1407 if ($direction eq 'OUT') {
1408 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1409 ruleset_addrule($ruleset, $chain, "-m mac
! --mac-source
$macaddr -j DROP
");
1411 ruleset_addrule($ruleset, $chain, "-j MARK
--set-mark
0"); # clear mark
1415 sub ruleset_generate_vm_rules {
1416 my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
1418 my $lc_direction = lc($direction);
1420 foreach my $rule (@$rules) {
1421 next if $rule->{iface} && $rule->{iface} ne $netid;
1422 next if !$rule->{enable};
1423 if ($rule->{type} eq 'group') {
1424 my $group_chain = "GROUP-
$rule->{action
}-$direction";
1425 if(!ruleset_chain_exist($ruleset, $group_chain)){
1426 generate_group_rules($ruleset, $cluster_conf, $rule->{action});
1428 ruleset_addrule($ruleset, $chain, "-j
$group_chain");
1429 if ($direction eq 'OUT'){
1430 ruleset_addrule($ruleset, $chain, "-m mark
--mark
1 -j RETURN
");
1432 my $accept = generate_nfqueue($options);
1433 ruleset_addrule($ruleset, $chain, "-m mark
--mark
1 -j
$accept");
1437 next if $rule->{type} ne $lc_direction;
1438 if ($direction eq 'OUT') {
1439 ruleset_generate_rule($ruleset, $chain, $rule,
1440 { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" }, undef, $cluster_conf);
1442 my $accept = generate_nfqueue($options);
1443 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept , REJECT => "PVEFW-reject
" }, undef, $cluster_conf);
1449 sub generate_nfqueue {
1453 if($options->{ips}){
1454 $action = "NFQUEUE
";
1455 if($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1456 if(defined($3) && defined($1)) {
1457 $action .= " --queue-balance
$1:$3";
1458 }elsif (defined($1)) {
1459 $action .= " --queue-num
$1";
1462 $action .= " --queue-bypass
";
1470 sub ruleset_generate_vm_ipsrules {
1471 my ($ruleset, $options, $direction, $iface, $bridge) = @_;
1473 if ($options->{ips} && $direction eq 'IN') {
1474 my $nfqueue = generate_nfqueue($options);
1476 if (!ruleset_chain_exist($ruleset, "$bridge-IPS
")) {
1477 ruleset_create_chain($ruleset, "PVEFW-IPS
");
1480 if (!ruleset_chain_exist($ruleset, "$bridge-IPS
")) {
1481 ruleset_create_chain($ruleset, "$bridge-IPS
");
1482 ruleset_insertrule($ruleset, "PVEFW-IPS
", "-o
$bridge -m physdev
--physdev-is-out
-j
$bridge-IPS
");
1485 ruleset_addrule($ruleset, "$bridge-IPS
", "-m physdev
--physdev-out
$iface --physdev-is-bridged
-j
$nfqueue");
1489 sub generate_venet_rules_direction {
1490 my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1492 parse_address_list($ip); # make sure we have a valid $ip list
1494 my $lc_direction = lc($direction);
1496 my $rules = $vmfw_conf->{rules};
1498 my $options = $vmfw_conf->{options};
1499 my $loglevel = get_option_log_level($options, "log_level_
${lc_direction
}");
1501 my $chain = "venet0-
$vmid-$direction";
1503 ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1505 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
1510 if ($direction eq 'OUT') {
1511 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1513 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1516 my $accept = generate_nfqueue($options);
1517 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : $accept;
1518 ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1520 # plug into FORWARD, INPUT and OUTPUT chain
1521 if ($direction eq 'OUT') {
1522 ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD
", {
1525 iface_in => 'venet0'});
1527 ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT
", {
1530 iface_in => 'venet0'});
1532 ruleset_generate_rule($ruleset, "PVEFW-FORWARD
", {
1535 iface_out => 'venet0'});
1537 ruleset_generate_rule($ruleset, "PVEFW-OUTPUT
", {
1540 iface_out => 'venet0'});
1544 sub generate_tap_rules_direction {
1545 my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_;
1547 my $lc_direction = lc($direction);
1549 my $rules = $vmfw_conf->{rules};
1551 my $options = $vmfw_conf->{options};
1552 my $loglevel = get_option_log_level($options, "log_level_
${lc_direction
}");
1554 my $tapchain = "$iface-$direction";
1556 ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1558 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
1560 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface, $bridge);
1565 if ($direction eq 'OUT') {
1566 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1568 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1571 my $accept = generate_nfqueue($options);
1572 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : $accept;
1573 ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1575 # plug the tap chain to bridge chain
1576 if ($direction eq 'IN') {
1577 ruleset_insertrule($ruleset, "$bridge-IN
",
1578 "-m physdev
--physdev-is-bridged
--physdev-out
$iface -j
$tapchain");
1580 ruleset_insertrule($ruleset, "$bridge-OUT
",
1581 "-m physdev
--physdev-in
$iface -j
$tapchain");
1585 sub enable_host_firewall {
1586 my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1588 # fixme: allow security groups
1590 my $options = $hostfw_conf->{options};
1591 my $rules = $hostfw_conf->{rules};
1593 # host inbound firewall
1594 my $chain = "PVEFW-HOST-IN
";
1595 ruleset_create_chain($ruleset, $chain);
1597 my $loglevel = get_option_log_level($options, "log_level_in
");
1599 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1600 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
,NEW
-j PVEFW-smurfs
");
1603 if ($options->{tcpflags}) {
1604 ruleset_addrule($ruleset, $chain, "-p tcp
-j PVEFW-tcpflags
");
1607 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
-j DROP
");
1608 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
-j ACCEPT
");
1609 ruleset_addrule($ruleset, $chain, "-i lo
-j ACCEPT
");
1610 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
-j ACCEPT
");
1611 ruleset_addrule($ruleset, $chain, "-p udp
-m conntrack
--ctstate NEW
--dport
5404:5405 -j ACCEPT
");
1612 ruleset_addrule($ruleset, $chain, "-p udp
-m udp
--dport
9000 -j ACCEPT
"); #corosync
1614 # we use RETURN because we need to check also tap rules
1615 my $accept_action = 'RETURN';
1617 foreach my $rule (@$rules) {
1618 next if $rule->{type} ne 'in';
1619 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" }, undef, $cluster_conf);
1622 # implement input policy
1623 my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1624 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1626 # host outbound firewall
1627 $chain = "PVEFW-HOST-OUT
";
1628 ruleset_create_chain($ruleset, $chain);
1630 $loglevel = get_option_log_level($options, "log_level_out
");
1632 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
-j DROP
");
1633 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
-j ACCEPT
");
1634 ruleset_addrule($ruleset, $chain, "-o lo
-j ACCEPT
");
1635 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
-j ACCEPT
");
1636 ruleset_addrule($ruleset, $chain, "-p udp
-m conntrack
--ctstate NEW
--dport
5404:5405 -j ACCEPT
");
1637 ruleset_addrule($ruleset, $chain, "-p udp
-m udp
--dport
9000 -j ACCEPT
"); #corosync
1639 # we use RETURN because we may want to check other thigs later
1640 $accept_action = 'RETURN';
1642 foreach my $rule (@$rules) {
1643 next if $rule->{type} ne 'out';
1644 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" }, undef, $cluster_conf);
1647 # implement output policy
1648 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1649 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1651 ruleset_addrule($ruleset, "PVEFW-OUTPUT
", "-j PVEFW-HOST-OUT
");
1652 ruleset_addrule($ruleset, "PVEFW-INPUT
", "-j PVEFW-HOST-IN
");
1655 sub generate_group_rules {
1656 my ($ruleset, $cluster_conf, $group) = @_;
1657 die "no such security group
'$group'\n" if !$cluster_conf->{groups}->{$group};
1659 my $rules = $cluster_conf->{groups}->{$group};
1661 my $chain = "GROUP-
${group
}-IN
";
1663 ruleset_create_chain($ruleset, $chain);
1664 ruleset_addrule($ruleset, $chain, "-j MARK
--set-mark
0"); # clear mark
1666 foreach my $rule (@$rules) {
1667 next if $rule->{type} ne 'in';
1668 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" }, undef, $cluster_conf);
1671 $chain = "GROUP-
${group
}-OUT
";
1673 ruleset_create_chain($ruleset, $chain);
1674 ruleset_addrule($ruleset, $chain, "-j MARK
--set-mark
0"); # clear mark
1676 foreach my $rule (@$rules) {
1677 next if $rule->{type} ne 'out';
1678 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1679 # check also other tap rules later
1680 ruleset_generate_rule($ruleset, $chain, $rule,
1681 { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject
" }, undef, $cluster_conf);
1686 my $valid_netdev_names = {};
1687 for (my $i = 0; $i < $MAX_NETS; $i++) {
1688 $valid_netdev_names->{"net
$i"} = 1;
1692 my ($line, $need_iface, $allow_groups) = @_;
1694 my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
1696 # we can add single line comments to the end of the rule
1697 my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
1699 # we can disable a rule when prefixed with '|'
1702 $enable = 0 if $line =~ s/^\|//;
1704 my @data = split(/\s+/, $line);
1705 my $expected_elements = $need_iface ? 8 : 7;
1707 die "wrong number of rule elements
\n" if scalar(@data) > $expected_elements;
1710 ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
1712 ($type, $action, $source, $dest, $proto, $dport, $sport) = @data;
1715 die "incomplete rule
\n" if ! ($type && $action);
1721 if ($type eq 'in' || $type eq 'out') {
1722 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1724 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1726 my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1727 die "unknown
macro '$1'\n" if !$preferred_name;
1728 $macro = $preferred_name;
1730 die "unknown action
'$action'\n";
1732 } elsif ($type eq 'group') {
1733 die "wrong number of rule elements
\n" if scalar(@data) != 3;
1734 die "groups disabled
\n" if !$allow_groups;
1736 die "invalid characters
in group name
\n" if $action !~ m/^[A-Za-z0-9_\-]+$/;
1738 die "unknown rule type
'$type'\n";
1742 $iface = undef if $iface && $iface eq '-';
1745 $proto = undef if $proto && $proto eq '-';
1746 pve_fw_verify_protocol_spec($proto) if $proto;
1748 $source = undef if $source && $source eq '-';
1749 $dest = undef if $dest && $dest eq '-';
1751 $dport = undef if $dport && $dport eq '-';
1752 $sport = undef if $sport && $sport eq '-';
1754 parse_port_name_number_or_range($dport) if defined($dport);
1755 parse_port_name_number_or_range($sport) if defined($sport);
1757 parse_address_list($source) if $source;
1758 parse_address_list($dest) if $dest;
1763 comment => $comment,
1775 sub parse_vmfw_option {
1780 my $loglevels = "emerg
|alert
|crit
|err
|warning
|notice
|info
|debug
|nolog
";
1782 if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags|ips):\s*(0|1)\s*$/i) {
1785 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1787 $value = $2 ? lc($3) : '';
1788 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1791 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1796 die "can
't parse option '$line'\n"
1799 return ($opt, $value);
1802 sub parse_hostfw_option {
1807 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1809 if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags|allow_bridge_route|optimize):\s*(0|1)\s*$/i) {
1812 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1814 $value = $2 ? lc($3) : '';
1815 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1818 } elsif ($line =~ m/^(nf_conntrack_max):\s*(\d+)\s*$/i) {
1823 die "can't parse option
'$line'\n"
1826 return ($opt, $value);
1829 sub parse_clusterfw_option {
1834 if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1839 die "can
't parse option '$line'\n"
1842 return ($opt, $value);
1845 sub parse_vm_fw_rules {
1846 my ($filename, $fh) = @_;
1848 my $res = { rules => [], options => {}};
1852 my $digest = Digest::SHA->new('sha1
');
1854 while (defined(my $line = <$fh>)) {
1855 $digest->add($line);
1857 next if $line =~ m/^#/;
1858 next if $line =~ m/^\s*$/;
1860 my $linenr = $fh->input_line_number();
1861 my $prefix = "$filename (line $linenr)";
1863 if ($line =~ m/^\[(\S+)\]\s*$/i) {
1865 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1869 warn "$prefix: skip line - no section";
1873 next if !$res->{$section}; # skip undefined section
1875 if ($section eq 'options
') {
1877 my ($opt, $value) = parse_vmfw_option($line);
1878 $res->{options}->{$opt} = $value;
1880 warn "$prefix: $@" if $@;
1885 eval { $rule = parse_fw_rule($line, 1, 1); };
1887 warn "$prefix: $err";
1891 push @{$res->{$section}}, $rule;
1894 $res->{digest} = $digest->b64digest;
1899 sub parse_host_fw_rules {
1900 my ($filename, $fh) = @_;
1902 my $res = { rules => [], options => {}};
1906 my $digest = Digest::SHA->new('sha1
');
1908 while (defined(my $line = <$fh>)) {
1909 $digest->add($line);
1911 next if $line =~ m/^#/;
1912 next if $line =~ m/^\s*$/;
1914 my $linenr = $fh->input_line_number();
1915 my $prefix = "$filename (line $linenr)";
1917 if ($line =~ m/^\[(\S+)\]\s*$/i) {
1919 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1923 warn "$prefix: skip line - no section";
1927 next if !$res->{$section}; # skip undefined section
1929 if ($section eq 'options
') {
1931 my ($opt, $value) = parse_hostfw_option($line);
1932 $res->{options}->{$opt} = $value;
1934 warn "$prefix: $@" if $@;
1939 eval { $rule = parse_fw_rule($line, 1, 1); };
1941 warn "$prefix: $err";
1945 push @{$res->{$section}}, $rule;
1948 $res->{digest} = $digest->b64digest;
1953 sub parse_cluster_fw_rules {
1954 my ($filename, $fh) = @_;
1959 my $res = { rules => [], options => {}, groups => {}, ipset => {} };
1961 my $digest = Digest::SHA->new('sha1
');
1963 while (defined(my $line = <$fh>)) {
1964 $digest->add($line);
1966 next if $line =~ m/^#/;
1967 next if $line =~ m/^\s*$/;
1969 my $linenr = $fh->input_line_number();
1970 my $prefix = "$filename (line $linenr)";
1972 if ($line =~ m/^\[options\]$/i) {
1973 $section = 'options
';
1977 if ($line =~ m/^\[group\s+(\S+)\]\s*$/i) {
1978 $section = 'groups
';
1983 if ($line =~ m/^\[rules\]$/i) {
1988 if ($line =~ m/^\[ipset\s+(\S+)\]\s*$/i) {
1995 warn "$prefix: skip line - no section\n";
1999 if ($section eq 'options
') {
2001 my ($opt, $value) = parse_clusterfw_option($line);
2002 $res->{options}->{$opt} = $value;
2004 warn "$prefix: $@" if $@;
2005 } elsif ($section eq 'rules
') {
2007 eval { $rule = parse_fw_rule($line, 1, 1); };
2009 warn "$prefix: $err";
2012 push @{$res->{$section}}, $rule;
2013 } elsif ($section eq 'groups
') {
2015 eval { $rule = parse_fw_rule($line, 0, 0); };
2017 warn "$prefix: $err";
2020 push @{$res->{$section}->{$group}}, $rule;
2021 } elsif ($section eq 'ipset
') {
2022 # we can add single line comments to the end of the rule
2023 my $comment = decode('utf8
', $1) if $line =~ s/#\s*(.*?)\s*$//;
2025 $line =~ m/^(\!)?\s*(\S+)\s*$/;
2031 eval { pve_verify_ipv4_or_cidr($cidr); };
2033 warn "$prefix: $cidr - $err";
2037 my $entry = { cidr => $cidr };
2038 $entry->{nomatch} = 1 if $nomatch;
2039 $entry->{comment} = $comment if $comment;
2041 push @{$res->{$section}->{$group}}, $entry;
2045 $res->{digest} = $digest->b64digest;
2050 my ($code, @param) = @_;
2054 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2061 sub read_local_vm_config {
2066 my $vmdata = { openvz => $openvz, qemu => $qemu };
2068 my $vmlist = PVE::Cluster::get_vmlist();
2069 return $vmdata if !$vmlist || !$vmlist->{ids};
2070 my $ids = $vmlist->{ids};
2072 foreach my $vmid (keys %$ids) {
2073 next if !$vmid; # skip VE0
2074 my $d = $ids->{$vmid};
2075 next if !$d->{node} || $d->{node} ne $nodename;
2076 next if !$d->{type};
2077 if ($d->{type} eq 'openvz
') {
2078 if ($have_pve_manager) {
2079 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2080 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2081 $openvz->{$vmid} = $conf;
2084 } elsif ($d->{type} eq 'qemu
') {
2085 if ($have_qemu_server) {
2086 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2087 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2088 $qemu->{$vmid} = $conf;
2097 sub load_vmfw_conf {
2102 my $filename = "/etc/pve/firewall/$vmid.fw";
2103 if (my $fh = IO::File->new($filename, O_RDONLY)) {
2104 $vmfw_conf = parse_vm_fw_rules($filename, $fh);
2110 my $format_rules = sub {
2111 my ($rules, $need_iface) = @_;
2115 foreach my $rule (@$rules) {
2116 if ($rule->{type} eq 'in' || $rule->{type} eq 'out
') {
2117 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2118 $raw .= uc($rule->{type});
2119 if ($rule->{macro}) {
2120 $raw .= " $rule->{macro}($rule->{action})";
2122 $raw .= " " . $rule->{action};
2124 $raw .= " " . ($rule->{iface} || '-') if $need_iface;
2125 $raw .= " " . ($rule->{source} || '-');
2126 $raw .= " " . ($rule->{dest} || '-');
2127 $raw .= " " . ($rule->{proto} || '-');
2128 $raw .= " " . ($rule->{dport} || '-');
2129 $raw .= " " . ($rule->{sport} || '-');
2130 $raw .= " # " . encode('utf8
', $rule->{comment})
2131 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2134 die "implement me '$rule->{type
}'";
2141 my $format_options = sub {
2146 $raw .= "[OPTIONS]\n\n";
2147 foreach my $opt (keys %$options) {
2148 $raw .= "$opt: $options->{$opt}\n";
2155 my $format_ipset = sub {
2161 foreach my $entry (@$options) {
2162 $nethash->{$entry->{cidr}} = $entry;
2165 foreach my $cidr (sort keys %$nethash) {
2166 my $entry = $nethash->{$cidr};
2167 my $line = $entry->{nomatch} ? '!' : '';
2168 $line .= $entry->{cidr};
2169 $line .= " # " . encode('utf8
', $entry->{comment})
2170 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2177 sub save_vmfw_conf {
2178 my ($vmid, $vmfw_conf) = @_;
2182 my $options = $vmfw_conf->{options};
2183 $raw .= &$format_options($options) if scalar(keys %$options);
2185 my $rules = $vmfw_conf->{rules};
2186 if (scalar(@$rules)) {
2187 $raw .= "[RULES]\n\n";
2188 $raw .= &$format_rules($rules, 1);
2192 my $filename = "/etc/pve/firewall/$vmid.fw";
2193 PVE::Tools::file_set_contents($filename, $raw);
2196 sub read_vm_firewall_configs {
2198 my $vmfw_configs = {};
2200 foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
2201 my $vmfw_conf = load_vmfw_conf($vmid);
2202 next if !$vmfw_conf->{options}; # skip if file does not exists
2203 $vmfw_configs->{$vmid} = $vmfw_conf;
2206 return $vmfw_configs;
2209 sub get_option_log_level {
2210 my ($options, $k) = @_;
2212 my $v = $options->{$k};
2213 $v = $default_log_level if !defined($v);
2215 return undef if $v eq '' || $v eq 'nolog
';
2217 $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2219 return $v if ($v >= 0) && ($v <= 7);
2221 warn "unknown log level ($k = '$v')\n";
2226 sub generate_std_chains {
2227 my ($ruleset, $options) = @_;
2229 my $loglevel = get_option_log_level($options, 'smurf_log_level
');
2231 # same as shorewall smurflog.
2232 my $chain = 'PVEFW-smurflog
';
2234 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2235 push @{$pve_std_chains->{$chain}}, "-j DROP";
2237 # same as shorewall logflags action.
2238 $loglevel = get_option_log_level($options, 'tcp_flags_log_level
');
2239 $chain = 'PVEFW-logflags
';
2240 # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2241 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2242 push @{$pve_std_chains->{$chain}}, "-j DROP";
2244 foreach my $chain (keys %$pve_std_chains) {
2245 ruleset_create_chain($ruleset, $chain);
2246 foreach my $rule (@{$pve_std_chains->{$chain}}) {
2248 ruleset_generate_rule($ruleset, $chain, $rule);
2250 ruleset_addrule($ruleset, $chain, $rule);
2256 sub generate_ipset_chains {
2257 my ($ipset_ruleset, $fw_conf) = @_;
2259 foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2260 generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset});
2264 sub generate_ipset {
2265 my ($ipset_ruleset, $name, $options) = @_;
2267 my $hashsize = scalar(@$options);
2268 if ($hashsize <= 64) {
2271 $hashsize = round_powerof2($hashsize);
2274 push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
2278 foreach my $entry (@$options) {
2279 $nethash->{$entry->{cidr}} = $entry;
2282 foreach my $cidr (sort keys %$nethash) {
2283 my $entry = $nethash->{$cidr};
2285 my $cmd = "add $name $cidr";
2286 if ($entry->{nomatch}) {
2287 if ($feature_ipset_nomatch) {
2288 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2290 warn "ignore !$cidr - nomatch not supported by kernel\n";
2293 push @{$ipset_ruleset->{$name}}, $cmd;
2298 sub round_powerof2 {
2302 $int |= $int >> $_ foreach (1,2,4,8,16);
2306 sub save_pvefw_status {
2309 die "unknown status '$status' - internal error"
2310 if $status !~ m/^(stopped|active)$/;
2312 mkdir dirname($pve_fw_status_filename);
2313 PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
2316 sub read_pvefw_status {
2318 my $status = 'unknown
';
2320 return 'stopped
' if ! -f $pve_fw_status_filename;
2323 $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
2330 # fixme: move to pve-common PVE::ProcFSTools
2331 sub read_proc_net_route {
2332 my $filename = "/proc/net/route";
2336 my $fh = IO::File->new ($filename, "r");
2337 return $res if !$fh;
2339 my $int_to_quad = sub {
2340 return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
2343 while (defined(my $line = <$fh>)) {
2344 next if $line =~/^Iface\s+Destination/; # skip head
2345 my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
2346 push @{$res->{$iface}}, {
2347 dest => &$int_to_quad(hex($dest)),
2348 gateway => &$int_to_quad(hex($gateway)),
2349 mask => &$int_to_quad(hex($mask)),
2358 sub load_clusterfw_conf {
2360 my $cluster_conf = {};
2361 if (my $fh = IO::File->new($clusterfw_conf_filename, O_RDONLY)) {
2362 $cluster_conf = parse_cluster_fw_rules($clusterfw_conf_filename, $fh);
2365 return $cluster_conf;
2368 sub save_clusterfw_conf {
2369 my ($cluster_conf) = @_;
2373 my $options = $cluster_conf->{options};
2374 $raw .= &$format_options($options) if scalar(keys %$options);
2376 foreach my $ipset (sort keys %{$cluster_conf->{ipset}}) {
2377 $raw .= "[IPSET $ipset]\n\n";
2378 my $options = $cluster_conf->{ipset}->{$ipset};
2379 $raw .= &$format_ipset($options);
2383 my $rules = $cluster_conf->{rules};
2384 if (scalar(@$rules)) {
2385 $raw .= "[RULES]\n\n";
2386 $raw .= &$format_rules($rules, 1);
2390 foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2391 my $rules = $cluster_conf->{groups}->{$group};
2392 $raw .= "[group $group]\n\n";
2393 $raw .= &$format_rules($rules, 0);
2397 PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2400 sub load_hostfw_conf {
2402 my $hostfw_conf = {};
2403 if (my $fh = IO::File->new($hostfw_conf_filename, O_RDONLY)) {
2404 $hostfw_conf = parse_host_fw_rules($hostfw_conf_filename, $fh);
2406 return $hostfw_conf;
2409 sub save_hostfw_conf {
2410 my ($hostfw_conf) = @_;
2414 my $options = $hostfw_conf->{options};
2415 $raw .= &$format_options($options) if scalar(keys %$options);
2417 my $rules = $hostfw_conf->{rules};
2418 if (scalar(@$rules)) {
2419 $raw .= "[RULES]\n\n";
2420 $raw .= &$format_rules($rules, 1);
2424 PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2428 my $vmdata = read_local_vm_config();
2429 my $vmfw_configs = read_vm_firewall_configs($vmdata);
2431 my $routing_table = read_proc_net_route();
2433 my $cluster_conf = load_clusterfw_conf();
2435 my $ipset_ruleset = {};
2436 generate_ipset_chains($ipset_ruleset, $cluster_conf);
2440 ruleset_create_chain($ruleset, "PVEFW-INPUT");
2441 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2443 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2445 my $hostfw_conf = load_hostfw_conf();
2446 my $hostfw_options = $hostfw_conf->{options} || {};
2448 generate_std_chains($ruleset, $hostfw_options);
2450 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2452 enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
2454 # generate firewall rules for QEMU VMs
2455 foreach my $vmid (keys %{$vmdata->{qemu}}) {
2456 my $conf = $vmdata->{qemu}->{$vmid};
2457 my $vmfw_conf = $vmfw_configs->{$vmid};
2458 next if !$vmfw_conf;
2459 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2461 foreach my $netid (keys %$conf) {
2462 next if $netid !~ m/^net(\d+)$/;
2463 my $net = PVE::QemuServer::parse_net($conf->{$netid});
2465 my $iface = "tap${vmid}i$1";
2467 my $bridge = $net->{bridge};
2468 next if !$bridge; # fixme: ?
2470 $bridge .= "v$net->{tag}" if $net->{tag};
2472 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2474 my $macaddr = $net->{macaddr};
2475 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2476 $vmfw_conf, $vmid, $bridge, 'IN
');
2477 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2478 $vmfw_conf, $vmid, $bridge, 'OUT
');
2482 # generate firewall rules for OpenVZ containers
2483 foreach my $vmid (keys %{$vmdata->{openvz}}) {
2484 my $conf = $vmdata->{openvz}->{$vmid};
2486 my $vmfw_conf = $vmfw_configs->{$vmid};
2487 next if !$vmfw_conf;
2488 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2490 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2491 my $ip = $conf->{ip_address}->{value};
2492 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN
');
2493 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT
');
2496 if ($conf->{netif} && $conf->{netif}->{value}) {
2497 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2498 foreach my $netid (keys %$netif) {
2499 my $d = $netif->{$netid};
2500 my $bridge = $d->{bridge};
2502 warn "no bridge device for CT $vmid iface '$netid'\n";
2506 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2508 my $macaddr = $d->{mac};
2509 my $iface = $d->{host_ifname};
2510 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2511 $vmfw_conf, $vmid, $bridge, 'IN
');
2512 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2513 $vmfw_conf, $vmid, $bridge, 'OUT
');
2518 if($hostfw_options->{optimize}){
2520 my $accept = ruleset_chain_exist($ruleset, "PVEFW-IPS") ? "PVEFW-IPS" : "ACCEPT";
2521 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
2522 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate INVALID -j DROP");
2525 # fixme: what log level should we use here?
2526 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2528 # fixme: should we really block inter-bridge traffic?
2530 # always allow traffic from containers?
2531 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN");
2533 # disable interbridge routing
2534 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop");
2535 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop");
2536 ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-o vmbr+");
2537 ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-i vmbr+");
2538 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP");
2539 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP");
2541 return wantarray ? ($ruleset, $hostfw_conf, $ipset_ruleset) : $ruleset;
2544 sub get_ruleset_status {
2545 my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2547 my $statushash = {};
2549 foreach my $chain (sort keys %$ruleset) {
2550 my $sig = &$digest_fn($ruleset->{$chain});
2552 $statushash->{$chain}->{sig} = $sig;
2554 my $oldsig = $active_chains->{$chain};
2555 if (!defined($oldsig)) {
2556 $statushash->{$chain}->{action} = 'create
';
2558 if ($oldsig eq $sig) {
2559 $statushash->{$chain}->{action} = 'exists';
2561 $statushash->{$chain}->{action} = 'update
';
2564 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2565 foreach my $cmd (@{$ruleset->{$chain}}) {
2566 print "\t$cmd\n" if $verbose;
2570 foreach my $chain (sort keys %$active_chains) {
2571 if (!defined($ruleset->{$chain})) {
2572 my $sig = $active_chains->{$chain};
2573 $statushash->{$chain}->{action} = 'delete';
2574 $statushash->{$chain}->{sig} = $sig;
2575 print "delete $chain ($sig)\n" if $verbose;
2582 sub print_sig_rule {
2583 my ($chain, $sig) = @_;
2585 # We just use this to store a SHA1 checksum used to detect changes
2586 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2589 sub get_ruleset_cmdlist {
2590 my ($ruleset, $verbose) = @_;
2592 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2594 my ($active_chains, $hooks) = iptables_get_chains();
2595 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2597 # create missing chains first
2598 foreach my $chain (sort keys %$ruleset) {
2599 my $stat = $statushash->{$chain};
2600 die "internal error" if !$stat;
2601 next if $stat->{action} ne 'create
';
2603 $cmdlist .= ":$chain - [0:0]\n";
2606 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2607 if (!$hooks->{$h}) {
2608 $cmdlist .= "-A $h -j PVEFW-$h\n";
2612 foreach my $chain (sort keys %$ruleset) {
2613 my $stat = $statushash->{$chain};
2614 die "internal error" if !$stat;
2616 if ($stat->{action
} eq 'update' || $stat->{action
} eq 'create') {
2617 $cmdlist .= "-F $chain\n";
2618 foreach my $cmd (@{$ruleset->{$chain}}) {
2619 $cmdlist .= "$cmd\n";
2621 $cmdlist .= print_sig_rule
($chain, $stat->{sig
});
2622 } elsif ($stat->{action
} eq 'delete') {
2623 die "internal error"; # this should not happen
2624 } elsif ($stat->{action
} eq 'exists') {
2627 die "internal error - unknown status '$stat->{action}'";
2631 foreach my $chain (keys %$statushash) {
2632 next if $statushash->{$chain}->{action
} ne 'delete';
2633 $cmdlist .= "-F $chain\n";
2635 foreach my $chain (keys %$statushash) {
2636 next if $statushash->{$chain}->{action
} ne 'delete';
2637 next if $chain eq 'PVEFW-INPUT';
2638 next if $chain eq 'PVEFW-OUTPUT';
2639 next if $chain eq 'PVEFW-FORWARD';
2640 $cmdlist .= "-X $chain\n";
2643 my $changes = $cmdlist ne "*filter\n" ?
1 : 0;
2645 $cmdlist .= "COMMIT\n";
2647 return wantarray ?
($cmdlist, $changes) : $cmdlist;
2650 sub get_ipset_cmdlist
{
2651 my ($ruleset, $verbose) = @_;
2655 my $delete_cmdlist = "";
2657 my $active_chains = ipset_get_chains
();
2658 my $statushash = get_ruleset_status
($ruleset, $active_chains, \
&ipset_chain_digest
, $verbose);
2660 # remove stale _swap chains
2661 foreach my $chain (keys %$active_chains) {
2662 if ($chain =~ m/^PVEFW-\S+_swap$/) {
2663 $cmdlist .= "destroy $chain\n";
2667 foreach my $chain (sort keys %$ruleset) {
2668 my $stat = $statushash->{$chain};
2669 die "internal error" if !$stat;
2671 if ($stat->{action
} eq 'create') {
2672 foreach my $cmd (@{$ruleset->{$chain}}) {
2673 $cmdlist .= "$cmd\n";
2677 if ($stat->{action
} eq 'update') {
2678 my $chain_swap = $chain."_swap";
2680 foreach my $cmd (@{$ruleset->{$chain}}) {
2681 $cmd =~ s/$chain/$chain_swap/;
2682 $cmdlist .= "$cmd\n";
2684 $cmdlist .= "swap $chain_swap $chain\n";
2685 $cmdlist .= "flush $chain_swap\n";
2686 $cmdlist .= "destroy $chain_swap\n";
2691 foreach my $chain (keys %$statushash) {
2692 next if $statushash->{$chain}->{action
} ne 'delete';
2694 $delete_cmdlist .= "flush $chain\n";
2695 $delete_cmdlist .= "destroy $chain\n";
2698 my $changes = ($cmdlist || $delete_cmdlist) ?
1 : 0;
2700 return ($cmdlist, $delete_cmdlist, $changes);
2704 my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
2706 enable_bridge_firewall
();
2708 update_nf_conntrack_max
($hostfw_conf);
2710 my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
2711 get_ipset_cmdlist
($ipset_ruleset, undef, $verbose);
2713 my ($cmdlist, $changes) = get_ruleset_cmdlist
($ruleset, $verbose);
2716 if ($ipset_changes) {
2717 print "ipset changes:\n";
2718 print $ipset_create_cmdlist if $ipset_create_cmdlist;
2719 print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2723 print "iptables changes:\n";
2728 ipset_restore_cmdlist
($ipset_create_cmdlist);
2730 iptables_restore_cmdlist
($cmdlist);
2732 ipset_restore_cmdlist
($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2734 # test: re-read status and check if everything is up to date
2735 my $active_chains = iptables_get_chains
();
2736 my $statushash = get_ruleset_status
($ruleset, $active_chains, \
&iptables_chain_digest
, 0);
2739 foreach my $chain (sort keys %$ruleset) {
2740 my $stat = $statushash->{$chain};
2741 if ($stat->{action
} ne 'exists') {
2742 warn "unable to update chain '$chain'\n";
2747 die "unable to apply firewall changes\n" if $errors;
2750 sub update_nf_conntrack_max
{
2751 my ($hostfw_conf) = @_;
2753 my $max = 65536; # reasonable default
2755 my $options = $hostfw_conf->{options
} || {};
2757 if (defined($options->{nf_conntrack_max
}) && ($options->{nf_conntrack_max
} > $max)) {
2758 $max = $options->{nf_conntrack_max
};
2759 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2762 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2763 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2765 my $current = int(PVE
::Tools
::file_read_firstline
($filename_nf_conntrack_max) || $max);
2767 if ($current != $max) {
2768 my $hashsize = int($max/4);
2769 PVE
::ProcFSTools
::write_proc_entry
($filename_hashsize, $hashsize);
2770 PVE
::ProcFSTools
::write_proc_entry
($filename_nf_conntrack_max, $max);
2774 sub remove_pvefw_chains
{
2776 my ($chash, $hooks) = iptables_get_chains
();
2777 my $cmdlist = "*filter\n";
2779 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2781 $cmdlist .= "-D $h -j PVEFW-$h\n";
2785 foreach my $chain (keys %$chash) {
2786 $cmdlist .= "-F $chain\n";
2789 foreach my $chain (keys %$chash) {
2790 $cmdlist .= "-X $chain\n";
2792 $cmdlist .= "COMMIT\n";
2794 iptables_restore_cmdlist
($cmdlist);
2798 my ($start, $verbose) = @_;
2801 my $status = read_pvefw_status
();
2803 my ($ruleset, $hostfw_conf, $ipset_ruleset) = compile
();
2805 if ($start || $status eq 'active') {
2807 save_pvefw_status
('active') if ($status ne 'active');
2809 apply_ruleset
($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
2811 print "Firewall not active (status = $status)\n" if $verbose;