8 use Socket qw(AF_INET6 inet_ntop inet_pton);
10 use PVE::Exception qw(raise raise_param_exc);
11 use PVE::JSONSchema qw(register_standard_option get_standard_option);
14 use PVE::Tools qw($IPV4RE $IPV6RE);
21 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
23 use Storable qw(dclone);
25 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
26 my $pvefw_conf_dir = "/etc/pve/firewall";
27 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
29 # dynamically include PVE::QemuServer and PVE::LXC
30 # to avoid dependency problems
33 require PVE::QemuServer;
34 require PVE::QemuConfig;
35 $have_qemu_server = 1;
45 my $pve_fw_status_dir = "/var/lib/pve-firewall";
47 mkdir $pve_fw_status_dir; # make sure this exists
49 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
50 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
51 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
53 my $max_alias_name_length = 64;
54 my $max_ipset_name_length = 64;
55 my $max_group_name_length = 18;
57 my $PROTOCOLS_WITH_PORTS = {
59 udplite => 1, 136 => 1,
65 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
66 sub pve_verify_ip_or_cidr {
67 my ($cidr, $noerr) = @_;
69 if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
70 return $cidr if Net::IP->new($cidr);
71 return undef if $noerr;
72 die Net::IP::Error() . "\n";
74 return undef if $noerr;
75 die "value does not look like a valid IP address or CIDR network\n";
78 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
79 sub pve_verify_ip_or_cidr_or_alias {
80 my ($cidr, $noerr) = @_;
82 return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
84 return pve_verify_ip_or_cidr($cidr, $noerr);
87 PVE::JSONSchema::register_standard_option('ipset-name', {
88 description => "IP set name.",
90 pattern => $ipset_name_pattern,
92 maxLength => $max_ipset_name_length,
95 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
96 description => "Alias name.",
98 pattern => $ip_alias_pattern,
100 maxLength => $max_alias_name_length,
103 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
104 description => "Log level.",
106 enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
110 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
111 description => "Security Group name.",
113 pattern => $security_group_name_pattern,
115 maxLength => $max_group_name_length,
118 my $feature_ipset_nomatch = 0;
120 my (undef, undef, $release) = POSIX::uname();
121 if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
122 my ($major, $minor) = ($1, $2);
123 $feature_ipset_nomatch = 1 if ($major > 3) ||
124 ($major == 3 && $minor >= 7);
129 my $nodename = PVE::INotify::nodename();
131 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
133 my $default_log_level = 'nolog'; # avoid logs by default
135 my $log_level_hash = {
152 # sport => port[,port[,port]].. or port:port
153 # dport => port[,port[,port]].. or port:port
154 # log => optional, loglevel
155 # logmsg => optional, logmsg - overwrites default
156 # iface_in => incomin interface
157 # iface_out => outgoing interface
158 # match => optional, overwrites generation of match
159 # target => optional, overwrites action
161 # we need to overwrite some macros for ipv6
162 my $pve_ipv6fw_macros = {
164 { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
166 'NeighborDiscovery' => [
167 "IPv6 neighbor solicitation, neighbor and router advertisement",
168 { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
169 { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
170 { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
171 { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
175 { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
178 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
179 { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
183 # imported/converted from: /usr/share/shorewall/macro.*
184 my $pve_fw_macros = {
187 { action => 'PARAM', proto => 'udp', dport => '10080' },
188 { action => 'PARAM', proto => 'tcp', dport => '10080' },
191 "Auth (identd) traffic",
192 { action => 'PARAM', proto => 'tcp', dport => '113' },
195 "Border Gateway Protocol traffic",
196 { action => 'PARAM', proto => 'tcp', dport => '179' },
199 "BitTorrent traffic for BitTorrent 3.1 and earlier",
200 { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
201 { action => 'PARAM', proto => 'udp', dport => '6881' },
204 "BitTorrent traffic for BitTorrent 3.2 and later",
205 { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
206 { action => 'PARAM', proto => 'udp', dport => '6881' },
209 "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
210 { action => 'PARAM', proto => 'tcp', dport => '6789' },
211 { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
214 "Concurrent Versions System pserver traffic",
215 { action => 'PARAM', proto => 'tcp', dport => '2401' },
218 "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
219 { action => 'PARAM', proto => 'tcp', dport => '1494' },
220 { action => 'PARAM', proto => 'udp', dport => '1604' },
221 { action => 'PARAM', proto => 'tcp', dport => '2598' },
224 "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
225 { action => 'PARAM', proto => 'tcp', dport => '3689' },
226 { action => 'PARAM', proto => 'udp', dport => '3689' },
229 "Distributed Checksum Clearinghouse spam filtering mechanism",
230 { action => 'PARAM', proto => 'tcp', dport => '6277' },
233 "Forwarded DHCP traffic",
234 { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
237 "Domain Name System traffic (upd and tcp)",
238 { action => 'PARAM', proto => 'udp', dport => '53' },
239 { action => 'PARAM', proto => 'tcp', dport => '53' },
242 "Distributed Compiler service",
243 { action => 'PARAM', proto => 'tcp', dport => '3632' },
246 "File Transfer Protocol",
247 { action => 'PARAM', proto => 'tcp', dport => '21' },
250 "Finger protocol (RFC 742)",
251 { action => 'PARAM', proto => 'tcp', dport => '79' },
254 "GNUnet secure peer-to-peer networking traffic",
255 { action => 'PARAM', proto => 'tcp', dport => '2086' },
256 { action => 'PARAM', proto => 'udp', dport => '2086' },
257 { action => 'PARAM', proto => 'tcp', dport => '1080' },
258 { action => 'PARAM', proto => 'udp', dport => '1080' },
261 "Generic Routing Encapsulation tunneling protocol",
262 { action => 'PARAM', proto => '47' },
265 "Git distributed revision control traffic",
266 { action => 'PARAM', proto => 'tcp', dport => '9418' },
269 "OpenPGP HTTP keyserver protocol traffic",
270 { action => 'PARAM', proto => 'tcp', dport => '11371' },
273 "Hypertext Transfer Protocol (WWW)",
274 { action => 'PARAM', proto => 'tcp', dport => '80' },
277 "Hypertext Transfer Protocol (WWW) over SSL",
278 { action => 'PARAM', proto => 'tcp', dport => '443' },
281 "Internet Cache Protocol V2 (Squid) traffic",
282 { action => 'PARAM', proto => 'udp', dport => '3130' },
285 "AOL Instant Messenger traffic",
286 { action => 'PARAM', proto => 'tcp', dport => '5190' },
289 "Internet Message Access Protocol",
290 { action => 'PARAM', proto => 'tcp', dport => '143' },
293 "Internet Message Access Protocol over SSL",
294 { action => 'PARAM', proto => 'tcp', dport => '993' },
297 "IPIP capsulation traffic",
298 { action => 'PARAM', proto => '94' },
302 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
303 { action => 'PARAM', proto => '50' },
306 "IPsec authentication (AH) traffic",
307 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
308 { action => 'PARAM', proto => '51' },
311 "IPsec traffic and Nat-Traversal",
312 { action => 'PARAM', proto => 'udp', dport => '500' },
313 { action => 'PARAM', proto => 'udp', dport => '4500' },
314 { action => 'PARAM', proto => '50' },
317 "Internet Relay Chat traffic",
318 { action => 'PARAM', proto => 'tcp', dport => '6667' },
321 "HP Jetdirect printing",
322 { action => 'PARAM', proto => 'tcp', dport => '9100' },
325 "Layer 2 Tunneling Protocol traffic",
326 { action => 'PARAM', proto => 'udp', dport => '1701' },
329 "Lightweight Directory Access Protocol traffic",
330 { action => 'PARAM', proto => 'tcp', dport => '389' },
333 "Secure Lightweight Directory Access Protocol traffic",
334 { action => 'PARAM', proto => 'tcp', dport => '636' },
337 "Microsoft Notification Protocol",
338 { action => 'PARAM', proto => 'tcp', dport => '1863' },
341 "Microsoft SQL Server",
342 { action => 'PARAM', proto => 'tcp', dport => '1433' },
345 "Mail traffic (SMTP, SMTPS, Submission)",
346 { action => 'PARAM', proto => 'tcp', dport => '25' },
347 { action => 'PARAM', proto => 'tcp', dport => '465' },
348 { action => 'PARAM', proto => 'tcp', dport => '587' },
352 { action => 'PARAM', proto => 'udp', dport => '5353' },
355 "Munin networked resource monitoring traffic",
356 { action => 'PARAM', proto => 'tcp', dport => '4949' },
360 { action => 'PARAM', proto => 'tcp', dport => '3306' },
363 "NNTP traffic (Usenet).",
364 { action => 'PARAM', proto => 'tcp', dport => '119' },
367 "Encrypted NNTP traffic (Usenet)",
368 { action => 'PARAM', proto => 'tcp', dport => '563' },
371 "Network Time Protocol (ntpd)",
372 { action => 'PARAM', proto => 'udp', dport => '123' },
375 "OSPF multicast traffic",
376 { action => 'PARAM', proto => '89' },
380 { action => 'PARAM', proto => 'udp', dport => '1194' },
383 "Symantec PCAnywere (tm)",
384 { action => 'PARAM', proto => 'udp', dport => '5632' },
385 { action => 'PARAM', proto => 'tcp', dport => '5631' },
389 { action => 'PARAM', proto => 'tcp', dport => '110' },
392 "Encrypted POP3 traffic",
393 { action => 'PARAM', proto => 'tcp', dport => '995' },
396 "Point-to-Point Tunneling Protocol",
397 { action => 'PARAM', proto => '47' },
398 { action => 'PARAM', proto => 'tcp', dport => '1723' },
402 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
406 { action => 'PARAM', proto => 'tcp', dport => '5432' },
409 "Line Printer protocol printing",
410 { action => 'PARAM', proto => 'tcp', dport => '515' },
413 "Microsoft Remote Desktop Protocol traffic",
414 { action => 'PARAM', proto => 'tcp', dport => '3389' },
417 "Routing Information Protocol (bidirectional)",
418 { action => 'PARAM', proto => 'udp', dport => '520' },
421 "BIND remote management protocol",
422 { action => 'PARAM', proto => 'tcp', dport => '953' },
425 "Razor Antispam System",
426 { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
429 "Remote time retrieval (rdate)",
430 { action => 'PARAM', proto => 'tcp', dport => '37' },
434 { action => 'PARAM', proto => 'tcp', dport => '873' },
437 "SANE network scanning",
438 { action => 'PARAM', proto => 'tcp', dport => '6566' },
441 "Microsoft SMB traffic",
442 { action => 'PARAM', proto => 'udp', dport => '135,445' },
443 { action => 'PARAM', proto => 'udp', dport => '137:139' },
444 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
445 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
448 "Samba Web Administration Tool",
449 { action => 'PARAM', proto => 'tcp', dport => '901' },
452 "Simple Mail Transfer Protocol",
453 { action => 'PARAM', proto => 'tcp', dport => '25' },
456 "Encrypted Simple Mail Transfer Protocol",
457 { action => 'PARAM', proto => 'tcp', dport => '465' },
460 "Simple Network Management Protocol",
461 { action => 'PARAM', proto => 'udp', dport => '161:162' },
462 { action => 'PARAM', proto => 'tcp', dport => '161' },
465 "Spam Assassin SPAMD traffic",
466 { action => 'PARAM', proto => 'tcp', dport => '783' },
469 "Secure shell traffic",
470 { action => 'PARAM', proto => 'tcp', dport => '22' },
473 "Subversion server (svnserve)",
474 { action => 'PARAM', proto => 'tcp', dport => '3690' },
477 "SixXS IPv6 Deployment and Tunnel Broker",
478 { action => 'PARAM', proto => 'tcp', dport => '3874' },
479 { action => 'PARAM', proto => 'udp', dport => '3740' },
480 { action => 'PARAM', proto => '41' },
481 { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
484 "Squid web proxy traffic",
485 { action => 'PARAM', proto => 'tcp', dport => '3128' },
488 "Mail message submission traffic",
489 { action => 'PARAM', proto => 'tcp', dport => '587' },
492 "Syslog protocol (RFC 5424) traffic",
493 { action => 'PARAM', proto => 'udp', dport => '514' },
494 { action => 'PARAM', proto => 'tcp', dport => '514' },
497 "Trivial File Transfer Protocol traffic",
498 { action => 'PARAM', proto => 'udp', dport => '69' },
502 { action => 'PARAM', proto => 'tcp', dport => '23' },
506 { action => 'PARAM', proto => 'tcp', dport => '992' },
509 "RFC 868 Time protocol",
510 { action => 'PARAM', proto => 'tcp', dport => '37' },
513 "Traceroute (for up to 30 hops) traffic",
514 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
515 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
518 "VNC traffic for VNC display's 0 - 99",
519 { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
522 "VNC traffic from Vncservers to Vncviewers in listen mode",
523 { action => 'PARAM', proto => 'tcp', dport => '5500' },
526 "WWW traffic (HTTP and HTTPS)",
527 { action => 'PARAM', proto => 'tcp', dport => '80' },
528 { action => 'PARAM', proto => 'tcp', dport => '443' },
531 "Web Cache/Proxy traffic (port 8080)",
532 { action => 'PARAM', proto => 'tcp', dport => '8080' },
536 { action => 'PARAM', proto => 'tcp', dport => '10000' },
539 "Whois (nicname, RFC 3912) traffic",
540 { action => 'PARAM', proto => 'tcp', dport => '43' },
544 my $pve_fw_parsed_macros;
545 my $pve_fw_macro_descr;
546 my $pve_fw_macro_ipversion = {};
547 my $pve_fw_preferred_macro_names = {};
549 my $FWACCEPTMARK_ON = "0x80000000/0x80000000";
550 my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
552 my $pve_std_chains = {};
553 my $pve_std_chains_conf = {};
554 $pve_std_chains_conf->{4} = {
555 'PVEFW-SET-ACCEPT-MARK' => [
556 { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
558 'PVEFW-DropBroadcast' => [
559 # same as shorewall 'Broadcast'
560 # simply DROP BROADCAST/MULTICAST/ANYCAST
561 # we can use this to reduce logging
562 { action => 'DROP', dsttype => 'BROADCAST' },
563 { action => 'DROP', dsttype => 'MULTICAST' },
564 { action => 'DROP', dsttype => 'ANYCAST' },
565 { action => 'DROP', dest => '224.0.0.0/4' },
568 # same as shorewall 'reject'
569 { action => 'DROP', dsttype => 'BROADCAST' },
570 { action => 'DROP', source => '224.0.0.0/4' },
571 { action => 'DROP', proto => 'icmp' },
572 { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
573 { match => '-p udp', target => '-j REJECT --reject-with icmp-port-unreachable' },
574 { match => '-p icmp', target => '-j REJECT --reject-with icmp-host-unreachable' },
575 { target => '-j REJECT --reject-with icmp-host-prohibited' },
578 # same as shorewall 'Drop', which is equal to DROP,
579 # but REJECT/DROP some packages to reduce logging,
580 # and ACCEPT critical ICMP types
581 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
582 # we are not interested in BROADCAST/MULTICAST/ANYCAST
583 { action => 'PVEFW-DropBroadcast' },
584 # ACCEPT critical ICMP types
585 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
586 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
587 # Drop packets with INVALID state
588 { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
589 # Drop Microsoft SMB noise
590 { action => 'DROP', proto => 'udp', dport => '135,445' },
591 { action => 'DROP', proto => 'udp', dport => '137:139' },
592 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
593 { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
594 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
595 # Drop new/NotSyn traffic so that it doesn't get logged
596 { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
598 { action => 'DROP', proto => 'udp', sport => 53 },
601 # same as shorewall 'Reject', which is equal to Reject,
602 # but REJECT/DROP some packages to reduce logging,
603 # and ACCEPT critical ICMP types
604 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
605 # we are not interested in BROADCAST/MULTICAST/ANYCAST
606 { action => 'PVEFW-DropBroadcast' },
607 # ACCEPT critical ICMP types
608 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
609 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
610 # Drop packets with INVALID state
611 { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
612 # Drop Microsoft SMB noise
613 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
614 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
615 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
616 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
617 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
618 # Drop new/NotSyn traffic so that it doesn't get logged
619 { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
621 { action => 'DROP', proto => 'udp', sport => 53 },
623 'PVEFW-tcpflags' => [
624 # same as shorewall tcpflags action.
625 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
626 { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
627 { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
628 { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
629 { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
630 { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
633 # same as shorewall smurfs action
634 # Filter packets for smurfs (packets with a broadcast address as the source).
635 { match => '-s 0.0.0.0/32', target => '-j RETURN' }, # allow DHCP
636 { match => '-m addrtype --src-type BROADCAST', target => '-g PVEFW-smurflog' },
637 { match => '-s 224.0.0.0/4', target => '-g PVEFW-smurflog' },
639 'PVEFW-smurflog' => [
640 { action => 'DROP', logmsg => 'DROP: ' },
642 'PVEFW-logflags' => [
643 { action => 'DROP', logmsg => 'DROP: ' },
647 $pve_std_chains_conf->{6} = {
648 'PVEFW-SET-ACCEPT-MARK' => [
649 { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
651 'PVEFW-DropBroadcast' => [
652 # same as shorewall 'Broadcast'
653 # simply DROP BROADCAST/MULTICAST/ANYCAST
654 # we can use this to reduce logging
655 #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
656 # ipv6 addrtype does not work with kernel 2.6.32
657 #{ action => 'DROP', dsttype => 'MULTICAST' },
658 #{ action => 'DROP', dsttype => 'ANYCAST' },
659 { action => 'DROP', dest => 'ff00::/8' },
660 #{ action => 'DROP', dest => '224.0.0.0/4' },
663 # same as shorewall 'reject'
664 #{ action => 'DROP', dsttype => 'BROADCAST' },
665 #{ action => 'DROP', source => '224.0.0.0/4' },
666 { action => 'DROP', proto => 'icmpv6' },
667 { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
668 #"-p udp -j REJECT --reject-with icmp-port-unreachable",
669 #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
670 #"-j REJECT --reject-with icmp-host-prohibited",
673 # same as shorewall 'Drop', which is equal to DROP,
674 # but REJECT/DROP some packages to reduce logging,
675 # and ACCEPT critical ICMP types
676 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
677 # we are not interested in BROADCAST/MULTICAST/ANYCAST
678 { action => 'PVEFW-DropBroadcast' },
679 # ACCEPT critical ICMP types
680 { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
681 { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
682 { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
683 # Drop packets with INVALID state
684 { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
685 # Drop Microsoft SMB noise
686 { action => 'DROP', proto => 'udp', dport => '135,445' },
687 { action => 'DROP', proto => 'udp', dport => '137:139'},
688 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
689 { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
690 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
691 # Drop new/NotSyn traffic so that it doesn't get logged
692 { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
694 { action => 'DROP', proto => 'udp', sport => 53 },
697 # same as shorewall 'Reject', which is equal to Reject,
698 # but REJECT/DROP some packages to reduce logging,
699 # and ACCEPT critical ICMP types
700 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
701 # we are not interested in BROADCAST/MULTICAST/ANYCAST
702 { action => 'PVEFW-DropBroadcast' },
703 # ACCEPT critical ICMP types
704 { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
705 { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
706 { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
707 # Drop packets with INVALID state
708 { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
709 # Drop Microsoft SMB noise
710 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
711 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139' },
712 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
713 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
714 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
715 # Drop new/NotSyn traffic so that it doesn't get logged
716 { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
718 { action => 'DROP', proto => 'udp', sport => 53 },
720 'PVEFW-tcpflags' => [
721 # same as shorewall tcpflags action.
722 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
723 { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
724 { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
725 { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
726 { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
727 { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
729 'PVEFW-logflags' => [
730 { action => 'DROP', logmsg => 'DROP: ' },
734 # iptables -p icmp -h
735 my $icmp_type_names = {
738 'destination-unreachable' => 1,
739 'network-unreachable' => 1,
740 'host-unreachable' => 1,
741 'protocol-unreachable' => 1,
742 'port-unreachable' => 1,
743 'fragmentation-needed' => 1,
744 'source-route-failed' => 1,
745 'network-unknown' => 1,
747 'network-prohibited' => 1,
748 'host-prohibited' => 1,
749 'TOS-network-unreachable' => 1,
750 'TOS-host-unreachable' => 1,
751 'communication-prohibited' => 1,
752 'host-precedence-violation' => 1,
753 'precedence-cutoff' => 1,
754 'source-quench' => 1,
756 'network-redirect' => 1,
757 'host-redirect' => 1,
758 'TOS-network-redirect' => 1,
759 'TOS-host-redirect' => 1,
761 'router-advertisement' => 1,
762 'router-solicitation' => 1,
763 'time-exceeded' => 1,
764 'ttl-zero-during-transit' => 1,
765 'ttl-zero-during-reassembly' => 1,
766 'parameter-problem' => 1,
767 'ip-header-bad' => 1,
768 'required-option-missing' => 1,
769 'timestamp-request' => 1,
770 'timestamp-reply' => 1,
771 'address-mask-request' => 1,
772 'address-mask-reply' => 1,
775 # ip6tables -p icmpv6 -h
777 my $icmpv6_type_names = {
779 'destination-unreachable' => 1,
781 'communication-prohibited' => 1,
782 'address-unreachable' => 1,
783 'port-unreachable' => 1,
784 'packet-too-big' => 1,
785 'time-exceeded' => 1,
786 'ttl-zero-during-transit' => 1,
787 'ttl-zero-during-reassembly' => 1,
788 'parameter-problem' => 1,
790 'unknown-header-type' => 1,
791 'unknown-option' => 1,
794 'router-solicitation' => 1,
795 'router-advertisement' => 1,
796 'neighbor-solicitation' => 1,
797 'neighbour-solicitation' => 1,
798 'neighbor-advertisement' => 1,
799 'neighbour-advertisement' => 1,
803 sub init_firewall_macros {
805 $pve_fw_parsed_macros = {};
808 my ($k, $macro) = @_;
809 my $lc_name = lc($k);
810 $pve_fw_macro_ipversion->{$k} = 0;
811 while (!ref($macro->[0])) {
812 my $desc = shift @$macro;
813 if ($desc eq 'ipv4only') {
814 $pve_fw_macro_ipversion->{$k} = 4;
815 } elsif ($desc eq 'ipv6only') {
816 $pve_fw_macro_ipversion->{$k} = 6;
818 $pve_fw_macro_descr->{$k} = $desc;
821 $pve_fw_preferred_macro_names->{$lc_name} = $k;
822 $pve_fw_parsed_macros->{$k} = $macro;
825 foreach my $k (keys %$pve_fw_macros) {
826 &$parse($k, $pve_fw_macros->{$k});
829 foreach my $k (keys %$pve_ipv6fw_macros) {
830 next if $pve_fw_parsed_macros->{$k};
831 &$parse($k, $pve_ipv6fw_macros->{$k});
832 $pve_fw_macro_ipversion->{$k} = 6;
836 init_firewall_macros();
839 return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
844 sub get_etc_services {
846 return $etc_services if $etc_services;
848 my $filename = "/etc/services";
850 my $fh = IO::File->new($filename, O_RDONLY);
852 warn "unable to read '$filename' - $!\n";
858 while (my $line = <$fh>) {
860 next if $line =~m/^#/;
861 next if ($line =~m/^\s*$/);
863 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp|sctp).*$!) {
864 $services->{byid}->{$2}->{name} = $1;
865 $services->{byid}->{$2}->{port} = $2;
866 $services->{byid}->{$2}->{$3} = 1;
867 $services->{byname}->{$1} = $services->{byid}->{$2};
873 $etc_services = $services;
876 return $etc_services;
879 sub parse_protocol_file {
882 my $fh = IO::File->new($filename, O_RDONLY);
884 warn "unable to read '$filename' - $!\n";
890 while (my $line = <$fh>) {
892 next if $line =~m/^#/;
893 next if ($line =~m/^\s*$/);
895 if ($line =~ m!^(\S+)\s+(\d+)(?:\s+.*)?$!) {
896 $protocols->{byid}->{$2}->{name} = $1;
897 $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
908 sub get_etc_protocols {
909 return $etc_protocols if $etc_protocols;
911 my $protocols = parse_protocol_file('/etc/protocols');
913 # add special case for ICMP v6
914 $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
915 $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
917 $etc_protocols = $protocols;
919 return $etc_protocols;
924 sub get_etc_ethertypes {
925 $etc_ethertypes = parse_protocol_file('/etc/ethertypes')
927 return $etc_ethertypes;
933 my ($new_value) = @_;
935 $__local_network = $new_value if defined($new_value);
937 return $__local_network if defined($__local_network);
940 my $nodename = PVE::INotify::nodename();
942 my $ip = PVE::Cluster::remote_node_ip($nodename);
944 my $testip = Net::IP->new($ip);
946 my $isv6 = $testip->version == 6;
947 my $routes = $isv6 ? PVE::ProcFSTools::read_proc_net_ipv6_route()
948 : PVE::ProcFSTools::read_proc_net_route();
949 foreach my $entry (@$routes) {
952 $mask = $entry->{prefix};
953 next if !$mask; # skip the default route...
955 $mask = $PVE::Network::ipv4_mask_hash_localnet->{$entry->{mask}};
956 next if !defined($mask);
958 my $cidr = "$entry->{dest}/$mask";
959 my $testnet = Net::IP->new($cidr);
960 my $overlap = $testnet->overlaps($testip);
961 if ($overlap == $Net::IP::IP_B_IN_A_OVERLAP ||
962 $overlap == $Net::IP::IP_IDENTICAL)
964 $__local_network = $cidr;
971 return $__local_network;
974 # ipset names are limited to 31 characters,
975 # and we use '-v4' or '-v6' to indicate IP versions,
976 # and we use '_swap' suffix for atomic update,
977 # for example PVEFW-${VMID}-${ipset_name}_swap
979 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
981 sub compute_ipset_chain_name {
982 my ($vmid, $ipset_name, $ipversion) = @_;
984 $vmid = 0 if !defined($vmid);
986 my $id = "$vmid-${ipset_name}-v$ipversion";
988 if (length($id) > $max_iptables_ipset_name_length) {
989 $id = PVE::Tools::fnv31a_hex($id);
995 sub compute_ipfilter_ipset_name {
998 return "ipfilter-$iface";
1001 sub parse_address_list {
1004 if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
1005 die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
1009 if ($str =~ m/^${ip_alias_pattern}$/) {
1010 die "alias name too long\n" if length($str) > $max_alias_name_length;
1018 my @elements = split(/,/, $str);
1019 die "extraneous commas in list\n" if $str ne join(',', @elements);
1020 foreach my $elem (@elements) {
1022 my $ip = Net::IP->new($elem);
1024 my $err = Net::IP::Error();
1025 die "invalid IP address: $err\n";
1027 $iprange = 1 if $elem =~ m/-/;
1029 my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
1031 die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
1032 if $ipversion && ($new_ipversion != $ipversion);
1034 $ipversion = $new_ipversion;
1037 die "you can't use a range in a list\n" if $iprange && $count > 1;
1042 sub parse_port_name_number_or_range {
1043 my ($str, $dport) = @_;
1045 my $services = PVE::Firewall::get_etc_services();
1049 my @elements = split(/,/, $str);
1050 die "extraneous commas in list\n" if $str ne join(',', @elements);
1051 foreach my $item (@elements) {
1052 if ($item =~ m/^(\d+):(\d+)$/) {
1054 my ($port1, $port2) = ($1, $2);
1055 die "invalid port '$port1'\n" if $port1 > 65535;
1056 die "invalid port '$port2'\n" if $port2 > 65535;
1057 } elsif ($item =~ m/^(\d+)$/) {
1060 die "invalid port '$port'\n" if $port > 65535;
1062 if ($dport && $icmp_type_names->{$item}) {
1064 } elsif ($dport && $icmpv6_type_names->{$item}) {
1067 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1072 die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 0;
1074 # I really don't like to use the word number here, but it's the only thing
1075 # that makes sense in a literal way. The range 1:100 counts as 2, not as
1076 # one and not as 100...
1077 die "too many entries in port list (> 15 numbers)\n"
1080 return (scalar(@elements) > 1);
1083 PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1084 sub pve_fw_verify_sport_spec {
1087 parse_port_name_number_or_range($portstr, 0);
1092 PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1093 sub pve_fw_verify_dport_spec {
1096 parse_port_name_number_or_range($portstr, 1);
1101 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1102 sub pve_fw_verify_addr_spec {
1105 parse_address_list($list);
1110 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1111 sub pve_fw_verify_protocol_spec {
1114 my $protocols = get_etc_protocols();
1116 die "unknown protocol '$proto'\n" if $proto &&
1117 !(defined($protocols->{byname}->{$proto}) ||
1118 defined($protocols->{byid}->{$proto}));
1124 # helper function for API
1126 sub copy_opject_with_digest {
1129 my $sha = Digest::SHA->new('sha1');
1132 foreach my $k (sort keys %$object) {
1133 my $v = $object->{$k};
1134 next if !defined($v);
1136 $sha->add($k, ':', $v, "\n");
1139 my $digest = $sha->hexdigest;
1141 $res->{digest} = $digest;
1143 return wantarray ? ($res, $digest) : $res;
1146 sub copy_list_with_digest {
1149 my $sha = Digest::SHA->new('sha1');
1152 foreach my $entry (@$list) {
1154 foreach my $k (sort keys %$entry) {
1155 my $v = $entry->{$k};
1156 next if !defined($v);
1158 # Note: digest ignores refs ($rule->{errors})
1159 # since Digest::SHA expects a series of bytes,
1160 # we have to encode the value here to prevent errors when
1161 # using utf8 characters (eg. in comments)
1162 $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
1167 my $digest = $sha->hexdigest;
1169 foreach my $entry (@$res) {
1170 $entry->{digest} = $digest;
1173 return wantarray ? ($res, $digest) : $res;
1176 our $cluster_option_properties = {
1178 description => "Enable or disable the firewall cluster wide.",
1184 description => "Input policy.",
1187 enum => ['ACCEPT', 'REJECT', 'DROP'],
1190 description => "Output policy.",
1193 enum => ['ACCEPT', 'REJECT', 'DROP'],
1197 our $host_option_properties = {
1199 description => "Enable host firewall rules.",
1203 log_level_in => get_standard_option('pve-fw-loglevel', {
1204 description => "Log level for incoming traffic." }),
1205 log_level_out => get_standard_option('pve-fw-loglevel', {
1206 description => "Log level for outgoing traffic." }),
1207 tcp_flags_log_level => get_standard_option('pve-fw-loglevel', {
1208 description => "Log level for illegal tcp flags filter." }),
1209 smurf_log_level => get_standard_option('pve-fw-loglevel', {
1210 description => "Log level for SMURFS filter." }),
1212 description => "Enable SMURFS filter.",
1217 description => "Filter illegal combinations of TCP flags.",
1221 nf_conntrack_max => {
1222 description => "Maximum number of tracked connections.",
1227 nf_conntrack_tcp_timeout_established => {
1228 description => "Conntrack established timeout.",
1234 description => "Enable NDP.",
1240 our $vm_option_properties = {
1242 description => "Enable/disable firewall rules.",
1247 description => "Enable/disable MAC address filter.",
1252 description => "Enable DHCP.",
1257 description => "Enable NDP.",
1262 description => "Allow sending Router Advertisement.",
1267 description => "Enable default IP filters. " .
1268 "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1269 "for every interface. Such ipsets implicitly contain sane default " .
1270 "restrictions such as restricting IPv6 link local addresses to " .
1271 "the one derived from the interface's MAC address. For containers " .
1272 "the configured IP addresses will be implicitly added.",
1277 description => "Input policy.",
1280 enum => ['ACCEPT', 'REJECT', 'DROP'],
1283 description => "Output policy.",
1286 enum => ['ACCEPT', 'REJECT', 'DROP'],
1288 log_level_in => get_standard_option('pve-fw-loglevel', {
1289 description => "Log level for incoming traffic." }),
1290 log_level_out => get_standard_option('pve-fw-loglevel', {
1291 description => "Log level for outgoing traffic." }),
1296 my $addr_list_descr = "This can refer to a single IP address, an IP set ('+ipsetname') or an IP alias definition. You can also specify an address range like '20.34.101.207-201.3.9.99', or a list of IP addresses and networks (entries are separated by comma). Please do not mix IPv4 and IPv6 addresses inside such lists.";
1298 my $port_descr = "You can use service names or simple numbers (0-65535), as defined in '/etc/services'. Port ranges can be specified with '\\d+:\\d+', for example '80:85', and you can use comma separated list to match several ports or ranges.";
1300 my $rule_properties = {
1302 description => "Update rule at position <pos>.",
1307 digest => get_standard_option('pve-config-digest'),
1309 description => "Rule type.",
1312 enum => ['in', 'out', 'group'],
1315 description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1318 pattern => $security_group_name_pattern,
1323 description => "Use predefined standard macro.",
1328 iface => get_standard_option('pve-iface', {
1329 description => "Network interface name. You have to use network configuration key names for VMs and containers ('net\\d+'). Host related rules can use arbitrary strings.",
1333 description => "Restrict packet source address. $addr_list_descr",
1334 type => 'string', format => 'pve-fw-addr-spec',
1338 description => "Restrict packet destination address. $addr_list_descr",
1339 type => 'string', format => 'pve-fw-addr-spec',
1343 description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1344 type => 'string', format => 'pve-fw-protocol-spec',
1348 description => "Flag to enable/disable a rule.",
1354 description => "Restrict TCP/UDP source port. $port_descr",
1355 type => 'string', format => 'pve-fw-sport-spec',
1359 description => "Restrict TCP/UDP destination port. $port_descr",
1360 type => 'string', format => 'pve-fw-dport-spec',
1364 description => "Descriptive comment.",
1370 sub add_rule_properties {
1371 my ($properties) = @_;
1373 foreach my $k (keys %$rule_properties) {
1374 my $h = $rule_properties->{$k};
1375 # copy data, so that we can modify later without side effects
1376 foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1382 sub delete_rule_properties {
1383 my ($rule, $delete_str) = @_;
1385 foreach my $opt (PVE::Tools::split_list($delete_str)) {
1386 raise_param_exc({ 'delete' => "no such property ('$opt')"})
1387 if !defined($rule_properties->{$opt});
1388 raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1389 if $opt eq 'type' || $opt eq 'action';
1390 delete $rule->{$opt};
1396 my $apply_macro = sub {
1397 my ($macro_name, $param, $verify, $ipversion) = @_;
1399 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1400 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1402 if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1403 $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1406 # skip macros which are specific to another ipversion
1407 if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1408 return if $ipversion != $required;
1413 foreach my $templ (@$macro_rules) {
1415 my $param_used = {};
1416 foreach my $k (keys %$templ) {
1417 my $v = $templ->{$k};
1418 if ($v eq 'PARAM') {
1420 $param_used->{$k} = 1;
1421 } elsif ($v eq 'DEST') {
1422 $v = $param->{dest};
1423 $param_used->{dest} = 1;
1424 } elsif ($v eq 'SOURCE') {
1425 $v = $param->{source};
1426 $param_used->{source} = 1;
1430 my $msg = "missing parameter '$k' in macro '$macro_name'";
1431 raise_param_exc({ macro => $msg }) if $verify;
1436 foreach my $k (keys %$param) {
1437 next if $k eq 'macro';
1438 next if !defined($param->{$k});
1439 next if $param_used->{$k};
1440 if (defined($rule->{$k})) {
1441 if ($rule->{$k} ne $param->{$k}) {
1442 my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1443 raise_param_exc({ $k => $msg }) if $verify;
1447 $rule->{$k} = $param->{$k};
1450 push @$rules, $rule;
1456 my $rule_env_iface_lookup = {
1465 my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1467 my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1469 my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1470 die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1472 my $errors = $rule->{errors} || {};
1474 my $error_count = 0;
1476 my $add_error = sub {
1477 my ($param, $msg) = @_;
1479 raise_param_exc({ $param => $msg }) if !$noerr;
1481 $errors->{$param} = $msg if !$errors->{$param};
1485 my $set_ip_version = sub {
1488 die "detected mixed ipv4/ipv6 adresses in rule\n"
1489 if $ipversion && ($vers != $ipversion);
1494 my $check_ipset_or_alias_property = sub {
1495 my ($name, $expected_ipversion) = @_;
1497 if (my $value = $rule->{$name}) {
1498 if ($value =~ m/^\+/) {
1499 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1500 &$add_error($name, "no such ipset '$1'")
1501 if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1504 &$add_error($name, "invalid ipset name '$value'");
1506 } elsif ($value =~ m/^${ip_alias_pattern}$/){
1507 my $alias = lc($value);
1508 &$add_error($name, "no such alias '$value'")
1509 if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1510 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1511 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1513 &$set_ip_version($e->{ipversion});
1518 my $type = $rule->{type};
1519 my $action = $rule->{action};
1521 &$add_error('type', "missing property") if !$type;
1522 &$add_error('action', "missing property") if !$action;
1525 if ($type eq 'in' || $type eq 'out') {
1526 &$add_error('action', "unknown action '$action'")
1527 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1528 } elsif ($type eq 'group') {
1529 &$add_error('type', "security groups not allowed")
1531 &$add_error('action', "invalid characters in security group name")
1532 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1534 &$add_error('type', "unknown rule type '$type'");
1538 if ($rule->{iface}) {
1539 &$add_error('type', "parameter -i not allowed for this rule type")
1541 eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1542 &$add_error('iface', $@) if $@;
1543 if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1544 &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1545 if $rule->{iface} !~ m/^net(\d+)$/;
1549 if ($rule->{macro}) {
1550 if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1551 $rule->{macro} = $preferred_name;
1553 &$add_error('macro', "unknown macro '$rule->{macro}'");
1557 if ($rule->{proto}) {
1558 eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1559 &$add_error('proto', $@) if $@;
1560 &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1561 &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1564 if ($rule->{dport}) {
1565 eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1566 &$add_error('dport', $@) if $@;
1567 my $proto = $rule->{proto};
1568 &$add_error('proto', "missing property - 'dport' requires this property")
1570 &$add_error('dport', "protocol '$proto' does not support ports")
1571 if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1572 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1575 if ($rule->{sport}) {
1576 eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1577 &$add_error('sport', $@) if $@;
1578 my $proto = $rule->{proto};
1579 &$add_error('proto', "missing property - 'sport' requires this property")
1581 &$add_error('sport', "protocol '$proto' does not support ports")
1582 if !$PROTOCOLS_WITH_PORTS->{$proto};
1585 if ($rule->{source}) {
1587 my $source_ipversion = parse_address_list($rule->{source});
1588 &$set_ip_version($source_ipversion);
1590 &$add_error('source', $@) if $@;
1591 &$check_ipset_or_alias_property('source', $ipversion);
1594 if ($rule->{dest}) {
1596 my $dest_ipversion = parse_address_list($rule->{dest});
1597 &$set_ip_version($dest_ipversion);
1599 &$add_error('dest', $@) if $@;
1600 &$check_ipset_or_alias_property('dest', $ipversion);
1603 $rule->{ipversion} = $ipversion if $ipversion;
1605 if ($rule->{macro} && !$error_count) {
1606 eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1608 if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1609 my $eh = $err->{errors};
1610 foreach my $p (keys %$eh) {
1611 &$add_error($p, $eh->{$p});
1614 &$add_error('macro', "$err");
1619 $rule->{errors} = $errors if $error_count;
1624 sub copy_rule_data {
1625 my ($rule, $param) = @_;
1627 foreach my $k (keys %$rule_properties) {
1628 if (defined(my $v = $param->{$k})) {
1629 if ($v eq '' || $v eq '-') {
1640 sub rules_modify_permissions {
1641 my ($rule_env) = @_;
1643 if ($rule_env eq 'host') {
1645 check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1647 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1649 check => ['perm', '/', [ 'Sys.Modify' ]],
1651 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1653 check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1660 sub rules_audit_permissions {
1661 my ($rule_env) = @_;
1663 if ($rule_env eq 'host') {
1665 check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1667 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1669 check => ['perm', '/', [ 'Sys.Audit' ]],
1671 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1673 check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1681 my $bridge_firewall_enabled = 0;
1683 sub enable_bridge_firewall {
1685 return if $bridge_firewall_enabled; # only once
1687 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1688 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1690 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1691 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1693 $bridge_firewall_enabled = 1;
1696 sub iptables_restore_cmdlist {
1699 run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1702 sub ip6tables_restore_cmdlist {
1705 run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1708 sub ipset_restore_cmdlist {
1711 run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1714 sub ebtables_restore_cmdlist {
1717 run_command("/sbin/ebtables-restore", input => $cmdlist, errmsg => "ebtables_restore_cmdlist");
1720 sub iptables_get_chains {
1721 my ($iptablescmd) = @_;
1723 $iptablescmd = "iptables" if !$iptablescmd;
1727 # check what chains we want to track
1728 my $is_pvefw_chain = sub {
1731 return 1 if $name =~ m/^PVEFW-\S+$/;
1733 return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1735 return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1737 return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1738 return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1750 return if $line =~ m/^#/;
1751 return if $line =~ m/^\s*$/;
1753 if ($line =~ m/^\*(\S+)$/) {
1758 return if $table ne 'filter';
1760 if ($line =~ m/^:(\S+)\s/) {
1762 return if !&$is_pvefw_chain($chain);
1763 $res->{$chain} = "unknown";
1764 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1765 my ($chain, $sig) = ($1, $2);
1766 return if !&$is_pvefw_chain($chain);
1767 $res->{$chain} = $sig;
1768 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1771 # simply ignore the rest
1776 run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1778 return wantarray ? ($res, $hooks) : $res;
1781 sub iptables_chain_digest {
1783 my $digest = Digest::SHA->new('sha1');
1784 foreach my $rule (@$rules) { # order is important
1785 $digest->add($rule);
1787 return $digest->b64digest;
1790 sub ipset_chain_digest {
1793 my $digest = Digest::SHA->new('sha1');
1794 foreach my $rule (sort @$rules) { # note: sorted
1795 $digest->add($rule);
1797 return $digest->b64digest;
1800 sub ipset_get_chains {
1808 return if $line =~ m/^#/;
1809 return if $line =~ m/^\s*$/;
1810 if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1812 $line =~ s/\s+$//; # delete trailing white space
1813 push @{$chains->{$chain}}, $line;
1815 # simply ignore the rest
1820 run_command("/sbin/ipset save", outfunc => $parser);
1822 # compute digest for each chain
1823 foreach my $chain (keys %$chains) {
1824 $res->{$chain} = ipset_chain_digest($chains->{$chain});
1830 sub ebtables_get_chains {
1837 return if $line =~ m/^#/;
1838 return if $line =~ m/^\s*$/;
1839 if ($line =~ m/^:(\S+)\s\S+$/) {
1840 # Make sure we know chains exist even if they're empty.
1841 $chains->{$1} //= [];
1842 } elsif ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1845 push @{$chains->{$chain}}, $line;
1846 } elsif ($line =~ m/^(?:\S+)\s(tap\d+i\d+-(:?IN|OUT))\s(?:\S+).*/) {
1849 push @{$chains->{$chain}}, $line;
1850 } elsif ($line =~ m/^(?:\S+)\s(veth\d+i\d+-(:?IN|OUT))\s(?:\S+).*/) {
1853 push @{$chains->{$chain}}, $line;
1855 # simply ignore the rest
1860 run_command("/sbin/ebtables-save", outfunc => $parser);
1862 # compute digest for each chain
1863 foreach my $chain (keys %$chains) {
1864 $res->{$chain} = iptables_chain_digest($chains->{$chain});
1869 # substitude action of rule according to action hash
1870 sub rule_substitude_action {
1871 my ($rule, $actions) = @_;
1873 if (my $action = $rule->{action}) {
1874 $rule->{action} = $actions->{$action} if defined($actions->{$action});
1878 # generate a src or dst match
1879 # $dir(ection) is either d or s
1880 sub ipt_gen_src_or_dst_match {
1881 my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
1886 } elsif ($dir eq 'd') {
1889 die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
1893 if ($adr =~ m/^\+/) {
1894 if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
1897 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1898 $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1899 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1900 $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1902 die "no such ipset '$name'\n";
1904 $match = "-m set --match-set ${ipset_chain} ${srcdst}";
1906 die "invalid security group name '$adr'\n";
1908 } elsif ($adr =~ m/^${ip_alias_pattern}$/){
1909 my $alias = lc($adr);
1910 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1911 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1912 die "no such alias '$adr'\n" if !$e;
1913 $match = "-${dir} $e->{cidr}";
1914 } elsif ($adr =~ m/\-/){
1915 $match = "-m iprange --${srcdst}-range $adr";
1917 $match = "-${dir} $adr";
1923 # convert a %rule to an array of iptables commands
1924 sub ipt_rule_to_cmds {
1925 my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
1927 die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
1931 if (defined $rule->{match}) {
1932 push @match, $rule->{match};
1934 push @match, "-i $rule->{iface_in}" if $rule->{iface_in};
1935 push @match, "-o $rule->{iface_out}" if $rule->{iface_out};
1937 if ($rule->{source}) {
1938 push @match, ipt_gen_src_or_dst_match($rule->{source}, 's', $ipversion, $cluster_conf, $fw_conf);
1940 if ($rule->{dest}) {
1941 push @match, ipt_gen_src_or_dst_match($rule->{dest}, 'd', $ipversion, $cluster_conf, $fw_conf);
1944 if (my $proto = $rule->{proto}) {
1945 push @match, "-p $proto";
1947 my $multidport = defined($rule->{dport}) && parse_port_name_number_or_range($rule->{dport}, 1);
1948 my $multisport = defined($rule->{sport}) && parse_port_name_number_or_range($rule->{sport}, 0);
1950 my $add_dport = sub {
1951 return if !$rule->{dport};
1953 if ($proto eq 'icmp') {
1954 # Note: we use dport to store --icmp-type
1955 die "unknown icmp-type '$rule->{dport}'\n"
1956 if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
1957 push @match, "-m icmp --icmp-type $rule->{dport}";
1958 } elsif ($proto eq 'icmpv6') {
1959 # Note: we use dport to store --icmpv6-type
1960 die "unknown icmpv6-type '$rule->{dport}'\n"
1961 if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
1962 push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
1963 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
1964 die "protocol $proto does not have ports\n";
1965 } elsif ($multidport) {
1966 push @match, "--match multiport", "--dports $rule->{dport}";
1968 push @match, "--dport $rule->{dport}";
1972 my $add_sport = sub {
1973 return if !$rule->{sport};
1975 die "protocol $proto does not have ports\n"
1976 if !$PROTOCOLS_WITH_PORTS->{$proto};
1978 push @match, "--match multiport", "--sports $rule->{sport}";
1980 push @match, "--sport $rule->{sport}";
1984 # order matters - single port before multiport!
1985 $add_dport->() if $multisport;
1987 $add_dport->() if !$multisport;
1988 } elsif ($rule->{dport} || $rule->{sport}) {
1989 die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1990 die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1993 push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1995 my $matchstr = scalar(@match) ? join(' ', @match) : "";
1998 if (defined $rule->{target}) {
1999 $targetstr = $rule->{target};
2001 my $action = (defined $rule->{action}) ? $rule->{action} : "";
2002 my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
2003 $targetstr = ($goto) ? "-g $action" : "-j $action";
2007 if (defined $rule->{log} && $rule->{log}) {
2008 my $logaction = get_log_rule_base($chain, $vmid, $rule->{logmsg}, $rule->{log});
2009 push @iptcmds, "-A $chain $matchstr $logaction";
2011 push @iptcmds, "-A $chain $matchstr $targetstr";
2015 sub ruleset_generate_rule {
2016 my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf) = @_;
2020 if ($rule->{macro}) {
2021 $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
2026 # update all or nothing
2028 foreach my $r (@$rules) {
2029 push @ipt_rule_cmds, ipt_rule_to_cmds($r, $chain, $ipversion, $cluster_conf, $fw_conf);
2031 foreach my $c (@ipt_rule_cmds) {
2032 ruleset_add_ipt_cmd($ruleset, $chain, $c);
2036 sub ruleset_create_chain {
2037 my ($ruleset, $chain) = @_;
2039 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
2040 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
2042 die "chain '$chain' already exists\n" if $ruleset->{$chain};
2044 $ruleset->{$chain} = [];
2047 sub ruleset_chain_exist {
2048 my ($ruleset, $chain) = @_;
2050 return $ruleset->{$chain} ? 1 : undef;
2053 # add an iptables command (like generated by ipt_rule_to_cmds) to a chain
2054 sub ruleset_add_ipt_cmd {
2055 my ($ruleset, $chain, $iptcmd) = @_;
2057 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2059 push @{$ruleset->{$chain}}, $iptcmd;
2062 sub ruleset_addrule {
2063 my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
2065 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2067 if (defined($log) && $log) {
2068 my $logaction = get_log_rule_base($chain, $vmid, $logmsg, $log);
2069 push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
2071 # for stable ebtables digests avoid double-spaces to match ebtables-save output
2072 $match .= ' ' if length($match);
2073 push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
2076 sub ruleset_insertrule {
2077 my ($ruleset, $chain, $match, $action, $log) = @_;
2079 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2081 unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2084 sub get_log_rule_base {
2085 my ($chain, $vmid, $msg, $loglevel) = @_;
2087 $vmid = 0 if !defined($vmid);
2088 $msg = "" if !defined($msg);
2090 # Note: we use special format for prefix to pass further
2091 # info to log daemon (VMID, LOGLEVEL and CHAIN)
2093 return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2096 sub ruleset_add_chain_policy {
2097 my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2099 if ($policy eq 'ACCEPT') {
2101 my $rule = { action => 'ACCEPT' };
2102 rule_substitude_action($rule, { ACCEPT => $accept_action});
2103 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2105 } elsif ($policy eq 'DROP') {
2107 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop");
2109 ruleset_addrule($ruleset, $chain, "", "-j DROP", $loglevel, "policy $policy: ", $vmid);
2110 } elsif ($policy eq 'REJECT') {
2111 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject");
2113 ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject", $loglevel, "policy $policy:", $vmid);
2116 die "internal error: unknown policy '$policy'";
2120 sub ruleset_chain_add_ndp {
2121 my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2122 return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2124 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation", $accept);
2125 if ($direction ne 'OUT' || $options->{radv}) {
2126 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", $accept);
2128 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation", $accept);
2129 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement", $accept);
2132 sub ruleset_chain_add_conn_filters {
2133 my ($ruleset, $chain, $accept) = @_;
2135 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID", "-j DROP");
2136 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED", "-j $accept");
2139 sub ruleset_chain_add_input_filters {
2140 my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2142 if ($cluster_conf->{ipset}->{blacklist}){
2143 if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2144 ruleset_create_chain($ruleset, "PVEFW-blacklist");
2145 ruleset_addrule($ruleset, "PVEFW-blacklist", "", "-j DROP", $loglevel, "DROP: ");
2147 my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2148 ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src", "-j PVEFW-blacklist");
2151 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2152 if ($ipversion == 4) {
2153 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW", "-j PVEFW-smurfs");
2157 if ($options->{tcpflags}) {
2158 ruleset_addrule($ruleset, $chain, "-p tcp", "-j PVEFW-tcpflags");
2162 sub ruleset_create_vm_chain {
2163 my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2165 ruleset_create_chain($ruleset, $chain);
2166 my $accept = generate_nfqueue($options);
2168 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2169 if ($ipversion == 4) {
2170 if ($direction eq 'OUT') {
2171 ruleset_generate_rule($ruleset, $chain, $ipversion,
2172 { action => 'PVEFW-SET-ACCEPT-MARK',
2173 proto => 'udp', sport => 68, dport => 67 });
2175 ruleset_generate_rule($ruleset, $chain, $ipversion,
2176 { action => 'ACCEPT',
2177 proto => 'udp', sport => 67, dport => 68 });
2179 } elsif ($ipversion == 6) {
2180 if ($direction eq 'OUT') {
2181 ruleset_generate_rule($ruleset, $chain, $ipversion,
2182 { action => 'PVEFW-SET-ACCEPT-MARK',
2183 proto => 'udp', sport => 546, dport => 547 });
2185 ruleset_generate_rule($ruleset, $chain, $ipversion,
2186 { action => 'ACCEPT',
2187 proto => 'udp', sport => 547, dport => 546 });
2193 if ($direction eq 'OUT') {
2194 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2195 ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr", "-j DROP");
2197 if ($ipversion == 6 && !$options->{radv}) {
2198 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", "-j DROP");
2200 if ($ipfilter_ipset) {
2201 ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src", "-j DROP");
2203 ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2206 my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2207 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2210 sub ruleset_add_group_rule {
2211 my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2213 my $group = $rule->{action};
2214 my $group_chain = "GROUP-$group-$direction";
2215 if(!ruleset_chain_exist($ruleset, $group_chain)){
2216 generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2219 if ($direction eq 'OUT' && $rule->{iface_out}) {
2220 ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out}", "-j $group_chain");
2221 } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2222 ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in}", "-j $group_chain");
2224 ruleset_addrule($ruleset, $chain, "", "-j $group_chain");
2227 ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON", "-j $action");
2230 sub ruleset_generate_vm_rules {
2231 my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
2233 my $lc_direction = lc($direction);
2235 my $in_accept = generate_nfqueue($options);
2237 foreach my $rule (@$rules) {
2238 next if $rule->{iface} && $rule->{iface} ne $netid;
2239 next if !$rule->{enable} || $rule->{errors};
2240 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2242 if ($rule->{type} eq 'group') {
2243 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2244 $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2246 next if $rule->{type} ne $lc_direction;
2248 if ($direction eq 'OUT') {
2249 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2250 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf);
2252 rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject" });
2253 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf);
2261 sub generate_nfqueue {
2264 if ($options->{ips}) {
2265 my $action = "NFQUEUE";
2266 if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2267 if (defined($3) && defined($1)) {
2268 $action .= " --queue-balance $1:$3";
2269 } elsif (defined($1)) {
2270 $action .= " --queue-num $1";
2273 $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2280 sub ruleset_generate_vm_ipsrules {
2281 my ($ruleset, $options, $direction, $iface) = @_;
2283 if ($options->{ips} && $direction eq 'IN') {
2284 my $nfqueue = generate_nfqueue($options);
2286 if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2287 ruleset_create_chain($ruleset, "PVEFW-IPS");
2290 ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged", "-j $nfqueue");
2294 sub generate_tap_rules_direction {
2295 my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2297 my $lc_direction = lc($direction);
2299 my $rules = $vmfw_conf->{rules};
2301 my $options = $vmfw_conf->{options};
2302 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2304 my $tapchain = "$iface-$direction";
2306 my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2307 my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2308 if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2310 # create chain with mac and ip filter
2311 ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2313 if ($options->{enable}) {
2314 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2316 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2321 if ($direction eq 'OUT') {
2322 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2324 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2327 my $accept = generate_nfqueue($options);
2328 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2329 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2331 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2332 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2335 # plug the tap chain to bridge chain
2336 if ($direction eq 'IN') {
2337 ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2338 "-m physdev --physdev-is-bridged --physdev-out $iface", "-j $tapchain");
2340 ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2341 "-m physdev --physdev-is-bridged --physdev-in $iface", "-j $tapchain");
2345 sub enable_host_firewall {
2346 my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2348 my $options = $hostfw_conf->{options};
2349 my $cluster_options = $cluster_conf->{options};
2350 my $rules = $hostfw_conf->{rules};
2351 my $cluster_rules = $cluster_conf->{rules};
2353 # host inbound firewall
2354 my $chain = "PVEFW-HOST-IN";
2355 ruleset_create_chain($ruleset, $chain);
2357 my $loglevel = get_option_log_level($options, "log_level_in");
2359 ruleset_addrule($ruleset, $chain, "-i lo", "-j ACCEPT");
2361 ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2362 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2363 ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2365 # we use RETURN because we need to check also tap rules
2366 my $accept_action = 'RETURN';
2368 ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2370 # add host rules first, so that cluster wide rules can be overwritten
2371 foreach my $rule (@$rules, @$cluster_rules) {
2372 next if !$rule->{enable} || $rule->{errors};
2373 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2375 $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2378 if ($rule->{type} eq 'group') {
2379 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2380 } elsif ($rule->{type} eq 'in') {
2381 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2382 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf);
2386 delete $rule->{iface_in};
2389 # allow standard traffic for management ipset (includes cluster network)
2390 my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2391 my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2392 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006", "-j $accept_action"); # PVE API
2393 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999", "-j $accept_action"); # PVE VNC Console
2394 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128", "-j $accept_action"); # SPICE Proxy
2395 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22", "-j $accept_action"); # SSH
2397 my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2398 my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2401 if ($localnet && ($ipversion == $localnet_ver)) {
2402 my $corosync_rule = "-p udp --dport 5404:5405";
2403 ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule", "-j $accept_action");
2404 ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
2407 # implement input policy
2408 my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2409 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2411 # host outbound firewall
2412 $chain = "PVEFW-HOST-OUT";
2413 ruleset_create_chain($ruleset, $chain);
2415 $loglevel = get_option_log_level($options, "log_level_out");
2417 ruleset_addrule($ruleset, $chain, "-o lo", "-j ACCEPT");
2419 ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2421 # we use RETURN because we may want to check other thigs later
2422 $accept_action = 'RETURN';
2423 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2425 ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2427 # add host rules first, so that cluster wide rules can be overwritten
2428 foreach my $rule (@$rules, @$cluster_rules) {
2429 next if !$rule->{enable} || $rule->{errors};
2430 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2432 $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2434 if ($rule->{type} eq 'group') {
2435 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2436 } elsif ($rule->{type} eq 'out') {
2437 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2438 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf);
2442 delete $rule->{iface_out};
2445 # allow standard traffic on cluster network
2446 if ($localnet && ($ipversion == $localnet_ver)) {
2447 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006", "-j $accept_action"); # PVE API
2448 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22", "-j $accept_action"); # SSH
2449 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999", "-j $accept_action"); # PVE VNC Console
2450 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128", "-j $accept_action"); # SPICE Proxy
2452 my $corosync_rule = "-p udp --dport 5404:5405";
2453 ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule", "-j $accept_action");
2454 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
2457 # implement output policy
2458 $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2459 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2461 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "", "-j PVEFW-HOST-OUT");
2462 ruleset_addrule($ruleset, "PVEFW-INPUT", "", "-j PVEFW-HOST-IN");
2465 sub generate_group_rules {
2466 my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2468 my $rules = $cluster_conf->{groups}->{$group};
2471 warn "no such security group '$group'\n";
2472 $rules = []; # create empty chain
2475 my $chain = "GROUP-${group}-IN";
2477 ruleset_create_chain($ruleset, $chain);
2478 ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2480 foreach my $rule (@$rules) {
2481 next if $rule->{type} ne 'in';
2482 next if !$rule->{enable} || $rule->{errors};
2483 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2484 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2485 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2488 $chain = "GROUP-${group}-OUT";
2490 ruleset_create_chain($ruleset, $chain);
2491 ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2493 foreach my $rule (@$rules) {
2494 next if $rule->{type} ne 'out';
2495 next if !$rule->{enable} || $rule->{errors};
2496 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2497 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2498 # check also other tap rules later
2499 rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
2500 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2505 my $valid_netdev_names = {};
2506 for (my $i = 0; $i < $MAX_NETS; $i++) {
2507 $valid_netdev_names->{"net$i"} = 1;
2510 sub get_mark_values {
2511 my ($value, $mask) = @_;
2512 $value = hex($value) if $value =~ /^0x/;
2513 $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2514 $mask = 0xffffffff if !defined($mask);
2515 return ($value, $mask);
2519 my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2521 my $orig_line = $line;
2525 # we can add single line comments to the end of the rule
2526 if ($line =~ s/#\s*(.*?)\s*$//) {
2527 $rule->{comment} = decode('utf8', $1);
2530 # we can disable a rule when prefixed with '|'
2532 $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2534 $line =~ s/^(\S+)\s+(\S+)\s*// ||
2535 die "unable to parse rule: $line\n";
2537 $rule->{type} = lc($1);
2538 $rule->{action} = $2;
2540 if ($rule->{type} eq 'in' || $rule->{type} eq 'out') {
2541 if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2542 $rule->{macro} = $1;
2543 $rule->{action} = $2;
2547 while (length($line)) {
2548 if ($line =~ s/^-i (\S+)\s*//) {
2549 $rule->{iface} = $1;
2553 last if $rule->{type} eq 'group';
2555 if ($line =~ s/^-p (\S+)\s*//) {
2556 $rule->{proto} = $1;
2560 if ($line =~ s/^-dport (\S+)\s*//) {
2561 $rule->{dport} = $1;
2565 if ($line =~ s/^-sport (\S+)\s*//) {
2566 $rule->{sport} = $1;
2569 if ($line =~ s/^-source (\S+)\s*//) {
2570 $rule->{source} = $1;
2573 if ($line =~ s/^-dest (\S+)\s*//) {
2581 die "unable to parse rule parameters: $line\n" if length($line);
2583 $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2584 if ($rule->{errors}) {
2585 # The verbose flag really means we're running from the CLI and want
2586 # output on the console - in the other case we really want such errors
2587 # to go into the syslog instead.
2588 my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2589 $log->("$prefix - errors in rule parameters: $orig_line\n");
2590 foreach my $p (keys %{$rule->{errors}}) {
2591 $log->(" $p: $rule->{errors}->{$p}\n");
2598 sub verify_ethertype {
2600 my $types = get_etc_ethertypes();
2601 die "unknown ethernet protocol type: $value\n"
2602 if !defined($types->{byname}->{$value}) &&
2603 !defined($types->{byid}->{$value});
2606 sub parse_vmfw_option {
2611 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2613 if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2616 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2618 $value = $2 ? lc($3) : '';
2619 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2622 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2625 } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
2628 verify_ethertype($_) foreach split(/\s*,\s*/, $value);
2630 die "can't parse option '$line'\n"
2633 return ($opt, $value);
2636 sub parse_hostfw_option {
2641 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2643 if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
2646 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2648 $value = $2 ? lc($3) : '';
2649 } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2653 die "can't parse option '$line'\n"
2656 return ($opt, $value);
2659 sub parse_clusterfw_option {
2664 if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2667 if (($value > 1) && ((time() - $value) > 60)) {
2670 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2674 die "can't parse option '$line'\n"
2677 return ($opt, $value);
2681 my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2683 my $alias = lc($cidr);
2684 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2685 $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2687 die "no such alias '$cidr'\n" if !$e;;
2689 return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2692 sub parse_ip_or_cidr {
2697 if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2700 } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2704 die "value does not look like a valid IP address or CIDR network\n";
2707 return wantarray ? ($cidr, $ipversion) : $cidr;
2713 # we can add single line comments to the end of the line
2714 my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2716 if ($line =~ m/^(\S+)\s(\S+)$/) {
2717 my ($name, $cidr) = ($1, $2);
2720 ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2725 ipversion => $ipversion,
2727 $data->{comment} = $comment if $comment;
2734 sub generic_fw_config_parser {
2735 my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2740 my $res = $empty_conf;
2742 while (defined(my $line = <$fh>)) {
2743 next if $line =~ m/^#/;
2744 next if $line =~ m/^\s*$/;
2748 my $linenr = $fh->input_line_number();
2749 my $prefix = "$filename (line $linenr)";
2751 if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2752 $section = 'options';
2756 if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2757 $section = 'aliases';
2761 if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2762 $section = 'groups';
2766 die "security group name too long\n" if length($group) > $max_group_name_length;
2767 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2770 ($section, $group, $comment) = undef;
2771 warn "$prefix: $err";
2775 $res->{$section}->{$group} = [];
2776 $res->{group_comments}->{$group} = decode('utf8', $comment)
2781 if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2786 if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2791 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2792 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2795 ($section, $group, $comment) = undef;
2796 warn "$prefix: $err";
2800 $res->{$section}->{$group} = [];
2801 $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2807 warn "$prefix: skip line - no section\n";
2811 if ($section eq 'options') {
2814 if ($rule_env eq 'cluster') {
2815 ($opt, $value) = parse_clusterfw_option($line);
2816 } elsif ($rule_env eq 'host') {
2817 ($opt, $value) = parse_hostfw_option($line);
2819 ($opt, $value) = parse_vmfw_option($line);
2821 $res->{options}->{$opt} = $value;
2823 warn "$prefix: $@" if $@;
2824 } elsif ($section eq 'aliases') {
2826 my $data = parse_alias($line);
2827 $res->{aliases}->{lc($data->{name})} = $data;
2829 warn "$prefix: $@" if $@;
2830 } elsif ($section eq 'rules') {
2832 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2834 warn "$prefix: $err";
2837 push @{$res->{$section}}, $rule;
2838 } elsif ($section eq 'groups') {
2840 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2842 warn "$prefix: $err";
2845 push @{$res->{$section}->{$group}}, $rule;
2846 } elsif ($section eq 'ipset') {
2847 # we can add single line comments to the end of the rule
2848 my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2850 $line =~ m/^(\!)?\s*(\S+)\s*$/;
2855 if ($nomatch && !$feature_ipset_nomatch) {
2856 $errors->{nomatch} = "nomatch not supported by kernel";
2860 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2861 resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2863 $cidr = parse_ip_or_cidr($cidr);
2868 $errors->{cidr} = $err;
2871 if ($cidr =~ m!/0+$!) {
2872 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
2875 my $entry = { cidr => $cidr };
2876 $entry->{nomatch} = 1 if $nomatch;
2877 $entry->{comment} = $comment if $comment;
2878 $entry->{errors} = $errors if $errors;
2880 if ($verbose && $errors) {
2881 warn "$prefix - errors in ipset '$group': $line\n";
2882 foreach my $p (keys %{$errors}) {
2883 warn " $p: $errors->{$p}\n";
2887 push @{$res->{$section}->{$group}}, $entry;
2889 warn "$prefix: skip line - unknown section\n";
2897 sub parse_hostfw_config {
2898 my ($filename, $fh, $cluster_conf, $verbose) = @_;
2900 my $empty_conf = { rules => [], options => {}};
2902 return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2905 sub parse_vmfw_config {
2906 my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2913 ipset_comments => {},
2916 return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2919 sub parse_clusterfw_config {
2920 my ($filename, $fh, $verbose) = @_;
2930 group_comments => {},
2932 ipset_comments => {},
2935 return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2939 my ($code, @param) = @_;
2943 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2950 sub read_local_vm_config {
2955 my $vmdata = { qemu => $qemu, lxc => $lxc };
2957 my $vmlist = PVE::Cluster::get_vmlist();
2958 return $vmdata if !$vmlist || !$vmlist->{ids};
2959 my $ids = $vmlist->{ids};
2961 foreach my $vmid (keys %$ids) {
2962 next if !$vmid; # skip VE0
2963 my $d = $ids->{$vmid};
2964 next if !$d->{node} || $d->{node} ne $nodename;
2965 next if !$d->{type};
2966 if ($d->{type} eq 'qemu') {
2967 if ($have_qemu_server) {
2968 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
2969 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2970 $qemu->{$vmid} = $conf;
2973 } elsif ($d->{type} eq 'lxc') {
2975 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
2976 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2977 $lxc->{$vmid} = $conf;
2986 sub load_vmfw_conf {
2987 my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2991 $dir = $pvefw_conf_dir if !defined($dir);
2993 my $filename = "$dir/$vmid.fw";
2994 if (my $fh = IO::File->new($filename, O_RDONLY)) {
2995 $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2996 $vmfw_conf->{vmid} = $vmid;
3002 my $format_rules = sub {
3003 my ($rules, $allow_iface) = @_;
3007 foreach my $rule (@$rules) {
3008 if ($rule->{type} eq 'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
3009 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
3010 $raw .= uc($rule->{type});
3011 if ($rule->{macro}) {
3012 $raw .= " $rule->{macro}($rule->{action})";
3014 $raw .= " " . $rule->{action};
3016 if ($allow_iface && $rule->{iface}) {
3017 $raw .= " -i $rule->{iface}";
3020 if ($rule->{type} ne 'group') {
3021 $raw .= " -source $rule->{source}" if $rule->{source};
3022 $raw .= " -dest $rule->{dest}" if $rule->{dest};
3023 $raw .= " -p $rule->{proto}" if $rule->{proto};
3024 $raw .= " -dport $rule->{dport}" if $rule->{dport};
3025 $raw .= " -sport $rule->{sport}" if $rule->{sport};
3028 $raw .= " # " . encode('utf8', $rule->{comment})
3029 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
3032 die "unknown rule type '$rule->{type}'";
3039 my $format_options = sub {
3044 $raw .= "[OPTIONS]\n\n";
3045 foreach my $opt (keys %$options) {
3046 $raw .= "$opt: $options->{$opt}\n";
3053 my $format_aliases = sub {
3058 $raw .= "[ALIASES]\n\n";
3059 foreach my $k (keys %$aliases) {
3060 my $e = $aliases->{$k};
3061 $raw .= "$e->{name} $e->{cidr}";
3062 $raw .= " # " . encode('utf8', $e->{comment})
3063 if $e->{comment} && $e->{comment} !~ m/^\s*$/;
3071 my $format_ipsets = sub {
3076 foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
3077 if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
3078 my $utf8comment = encode('utf8', $comment);
3079 $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3081 $raw .= "[IPSET $ipset]\n\n";
3083 my $options = $fw_conf->{ipset}->{$ipset};
3086 foreach my $entry (@$options) {
3087 $nethash->{$entry->{cidr}} = $entry;
3090 foreach my $cidr (sort keys %$nethash) {
3091 my $entry = $nethash->{$cidr};
3092 my $line = $entry->{nomatch} ? '!' : '';
3093 $line .= $entry->{cidr};
3094 $line .= " # " . encode('utf8', $entry->{comment})
3095 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3105 sub save_vmfw_conf {
3106 my ($vmid, $vmfw_conf) = @_;
3110 my $options = $vmfw_conf->{options};
3111 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3113 my $aliases = $vmfw_conf->{aliases};
3114 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3116 $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
3118 my $rules = $vmfw_conf->{rules} || [];
3119 if ($rules && scalar(@$rules)) {
3120 $raw .= "[RULES]\n\n";
3121 $raw .= &$format_rules($rules, 1);
3125 my $filename = "$pvefw_conf_dir/$vmid.fw";
3127 mkdir $pvefw_conf_dir;
3128 PVE::Tools::file_set_contents($filename, $raw);
3134 sub remove_vmfw_conf {
3137 my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3139 unlink $vmfw_conffile;
3142 sub clone_vmfw_conf {
3143 my ($vmid, $newid) = @_;
3145 my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3146 my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3148 if (-f $clonevm_conffile) {
3149 unlink $clonevm_conffile;
3151 if (-f $sourcevm_conffile) {
3152 my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3153 PVE::Tools::file_set_contents($clonevm_conffile, $data);
3157 sub read_vm_firewall_configs {
3158 my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
3160 my $vmfw_configs = {};
3162 foreach my $vmid (keys %{$vmdata->{qemu}}) {
3163 my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
3164 next if !$vmfw_conf->{options}; # skip if file does not exists
3165 $vmfw_configs->{$vmid} = $vmfw_conf;
3167 foreach my $vmid (keys %{$vmdata->{lxc}}) {
3168 my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
3169 next if !$vmfw_conf->{options}; # skip if file does not exists
3170 $vmfw_configs->{$vmid} = $vmfw_conf;
3173 return $vmfw_configs;
3176 sub get_option_log_level {
3177 my ($options, $k) = @_;
3179 my $v = $options->{$k};
3180 $v = $default_log_level if !defined($v);
3182 return undef if $v eq '' || $v eq 'nolog';
3184 $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
3186 return $v if ($v >= 0) && ($v <= 7);
3188 warn "unknown log level ($k = '$v')\n";
3193 sub generate_std_chains {
3194 my ($ruleset, $options, $ipversion) = @_;
3196 my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3198 my $loglevel = get_option_log_level($options, 'smurf_log_level');
3199 my $chain = 'PVEFW-smurflog';
3200 if ( $std_chains->{$chain} ) {
3201 foreach my $r (@{$std_chains->{$chain}}) {
3202 $r->{log} = $loglevel;
3206 # same as shorewall logflags action.
3207 $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
3208 $chain = 'PVEFW-logflags';
3209 if ( $std_chains->{$chain} ) {
3210 foreach my $r (@{$std_chains->{$chain}}) {
3211 $r->{log} = $loglevel;
3215 foreach my $chain (keys %$std_chains) {
3216 ruleset_create_chain($ruleset, $chain);
3217 foreach my $rule (@{$std_chains->{$chain}}) {
3219 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
3221 die "rule $rule as string - should not happen";
3227 sub generate_ipset_chains {
3228 my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3230 foreach my $ipset (keys %{$ipsets}) {
3232 my $options = $ipsets->{$ipset};
3234 if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3235 if (my $ips = $device_ips->{$1}) {
3236 $options = [@$options, @$ips];
3242 foreach my $entry (@$options) {
3243 next if $entry->{errors}; # skip entries with errors
3246 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3247 ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3249 ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3251 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3253 # ip_compress_address takes an address only, no CIDR
3254 my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3255 $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3256 $cidr .= $prefix_len if defined($prefix_len);
3262 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3267 foreach my $ipversion (4, 6) {
3268 my $data = $nethash->{$ipversion};
3270 my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3272 my $hashsize = scalar(@$options);
3273 if ($hashsize <= 64) {
3276 $hashsize = round_powerof2($hashsize);
3279 my $family = $ipversion == "6" ? "inet6" : "inet";
3281 $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3283 foreach my $cidr (sort keys %$data) {
3284 my $entry = $data->{$cidr};
3286 my $cmd = "add $name $cidr";
3287 if ($entry->{nomatch}) {
3288 if ($feature_ipset_nomatch) {
3289 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3291 warn "ignore !$cidr - nomatch not supported by kernel\n";
3294 push @{$ipset_ruleset->{$name}}, $cmd;
3301 sub round_powerof2 {
3305 $int |= $int >> $_ foreach (1,2,4,8,16);
3309 sub load_clusterfw_conf {
3310 my ($filename, $verbose) = @_;
3312 $filename = $clusterfw_conf_filename if !defined($filename);
3314 my $cluster_conf = {};
3315 if (my $fh = IO::File->new($filename, O_RDONLY)) {
3316 $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3319 return $cluster_conf;
3322 sub save_clusterfw_conf {
3323 my ($cluster_conf) = @_;
3327 my $options = $cluster_conf->{options};
3328 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3330 my $aliases = $cluster_conf->{aliases};
3331 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3333 $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3335 my $rules = $cluster_conf->{rules};
3336 if ($rules && scalar(@$rules)) {
3337 $raw .= "[RULES]\n\n";
3338 $raw .= &$format_rules($rules, 1);
3342 if ($cluster_conf->{groups}) {
3343 foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3344 my $rules = $cluster_conf->{groups}->{$group};
3345 if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3346 my $utf8comment = encode('utf8', $comment);
3347 $raw .= "[group $group] # $utf8comment\n\n";
3349 $raw .= "[group $group]\n\n";
3352 $raw .= &$format_rules($rules, 0);
3358 mkdir $pvefw_conf_dir;
3359 PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3361 unlink $clusterfw_conf_filename;
3365 sub load_hostfw_conf {
3366 my ($cluster_conf, $filename, $verbose) = @_;
3368 $filename = $hostfw_conf_filename if !defined($filename);
3370 my $hostfw_conf = {};
3371 if (my $fh = IO::File->new($filename, O_RDONLY)) {
3372 $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3374 return $hostfw_conf;
3377 sub save_hostfw_conf {
3378 my ($hostfw_conf) = @_;
3382 my $options = $hostfw_conf->{options};
3383 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3385 my $rules = $hostfw_conf->{rules};
3386 if ($rules && scalar(@$rules)) {
3387 $raw .= "[RULES]\n\n";
3388 $raw .= &$format_rules($rules, 1);
3393 PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3395 unlink $hostfw_conf_filename;
3400 my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3404 # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3405 $pve_std_chains = dclone($pve_std_chains_conf);
3407 if ($vmdata) { # test mode
3408 my $testdir = $vmdata->{testdir} || die "no test directory specified";
3409 my $filename = "$testdir/cluster.fw";
3410 $cluster_conf = load_clusterfw_conf($filename, $verbose);
3412 $filename = "$testdir/host.fw";
3413 $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3415 $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3416 } else { # normal operation
3417 $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3419 $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3421 $vmdata = read_local_vm_config();
3422 $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3425 return ({},{},{}) if !$cluster_conf->{options}->{enable};
3428 if ($cluster_conf->{aliases}->{local_network}) {
3429 $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3432 ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3434 $cluster_conf->{aliases}->{local_network} = {
3435 name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3438 push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3440 my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3441 my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3442 my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $verbose);
3443 my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3445 return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
3448 sub compile_iptables_filter {
3449 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3453 ruleset_create_chain($ruleset, "PVEFW-INPUT");
3454 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3456 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3458 my $hostfw_options = $hostfw_conf->{options} || {};
3460 # fixme: what log level should we use here?
3461 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3463 ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3465 ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3466 ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3468 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3470 ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3471 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3473 generate_std_chains($ruleset, $hostfw_options, $ipversion);
3475 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3477 if ($hostfw_enable) {
3478 eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3479 warn $@ if $@; # just to be sure - should not happen
3482 # generate firewall rules for QEMU VMs
3483 foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3485 my $conf = $vmdata->{qemu}->{$vmid};
3486 my $vmfw_conf = $vmfw_configs->{$vmid};
3487 return if !$vmfw_conf;
3489 foreach my $netid (sort keys %$conf) {
3490 next if $netid !~ m/^net(\d+)$/;
3491 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3492 next if !$net->{firewall};
3493 my $iface = "tap${vmid}i$1";
3495 my $macaddr = $net->{macaddr};
3496 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3497 $vmfw_conf, $vmid, 'IN', $ipversion);
3498 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3499 $vmfw_conf, $vmid, 'OUT', $ipversion);
3502 warn $@ if $@; # just to be sure - should not happen
3505 # generate firewall rules for LXC containers
3506 foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3508 my $conf = $vmdata->{lxc}->{$vmid};
3509 my $vmfw_conf = $vmfw_configs->{$vmid};
3510 return if !$vmfw_conf;
3512 if ($vmfw_conf->{options}->{enable}) {
3513 foreach my $netid (sort keys %$conf) {
3514 next if $netid !~ m/^net(\d+)$/;
3515 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3516 next if !$net->{firewall};
3517 my $iface = "veth${vmid}i$1";
3518 my $macaddr = $net->{hwaddr};
3519 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3520 $vmfw_conf, $vmid, 'IN', $ipversion);
3521 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3522 $vmfw_conf, $vmid, 'OUT', $ipversion);
3526 warn $@ if $@; # just to be sure - should not happen
3529 if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3530 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3536 sub mac_to_linklocal {
3538 my @parts = split(/:/, $macaddr);
3539 # The standard link local address uses the fe80::/64 prefix with the
3540 # modified EUI-64 identifier derived from the MAC address by flipping the
3541 # universal/local bit and inserting FF:FE in the middle.
3543 $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3544 my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3545 return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3548 sub compile_ipsets {
3549 my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3552 if ($cluster_conf->{aliases}->{local_network}) {
3553 $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3556 ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3558 $cluster_conf->{aliases}->{local_network} = {
3559 name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3562 push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3565 my $ipset_ruleset = {};
3567 # generate ipsets for QEMU VMs
3568 foreach my $vmid (keys %{$vmdata->{qemu}}) {
3570 my $conf = $vmdata->{qemu}->{$vmid};