13 use Socket
qw(AF_INET AF_INET6 inet_ntop inet_pton);
14 use Storable
qw(dclone);
18 use PVE
::Exception
qw(raise raise_param_exc);
20 use PVE
::JSONSchema
qw(register_standard_option get_standard_option);
24 use PVE
::Tools
qw($IPV4RE $IPV6RE);
25 use PVE
::Tools
qw(run_command lock_file dir_glob_foreach);
27 my $pvefw_conf_dir = "/etc/pve/firewall";
28 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
30 # dynamically include PVE::QemuServer and PVE::LXC
31 # to avoid dependency problems
34 require PVE
::QemuServer
;
35 require PVE
::QemuConfig
;
36 $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
();
130 my $hostfw_conf_filename = "/etc/pve/nodes/$nodename/host.fw";
132 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
134 my $default_log_level = 'nolog'; # avoid logs by default
135 my $global_log_ratelimit = '--limit 1/sec';
137 my $log_level_hash = {
159 # sport => port[,port[,port]].. or port:port
160 # dport => port[,port[,port]].. or port:port
161 # log => optional, loglevel
162 # logmsg => optional, logmsg - overwrites default
163 # iface_in => incomin interface
164 # iface_out => outgoing interface
165 # match => optional, overwrites generation of match
166 # target => optional, overwrites action
168 # we need to overwrite some macros for ipv6
169 my $pve_ipv6fw_macros = {
171 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'echo-request' },
173 'NeighborDiscovery' => [
174 "IPv6 neighbor solicitation, neighbor and router advertisement",
175 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'router-solicitation' },
176 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'router-advertisement' },
177 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'neighbor-solicitation' },
178 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'neighbor-advertisement' },
182 { action
=> 'PARAM', proto
=> 'udp', dport
=> '546:547', sport
=> '546:547' },
185 { action
=> 'PARAM', proto
=> 'udp', dport
=> '33434:33524' },
186 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'echo-request' },
190 # imported/converted from: /usr/share/shorewall/macro.*
191 my $pve_fw_macros = {
194 { action
=> 'PARAM', proto
=> 'udp', dport
=> '10080' },
195 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10080' },
198 "Auth (identd) traffic",
199 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '113' },
202 "Border Gateway Protocol traffic",
203 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '179' },
206 "BitTorrent traffic for BitTorrent 3.1 and earlier",
207 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6889' },
208 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
211 "BitTorrent traffic for BitTorrent 3.2 and later",
212 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6999' },
213 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
216 "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
217 # Legacy port for protocol v1
218 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6789' },
219 # New port for protocol v2
220 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3300' },
221 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6800:7300' },
224 "Concurrent Versions System pserver traffic",
225 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2401' },
228 "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
229 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1494' },
230 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1604' },
231 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2598' },
234 "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
235 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3689' },
236 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3689' },
239 "Distributed Checksum Clearinghouse spam filtering mechanism",
240 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6277' },
243 "Forwarded DHCP traffic",
244 { action
=> 'PARAM', proto
=> 'udp', dport
=> '67:68', sport
=> '67:68' },
247 "Domain Name System traffic (upd and tcp)",
248 { action
=> 'PARAM', proto
=> 'udp', dport
=> '53' },
249 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '53' },
252 "Distributed Compiler service",
253 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3632' },
256 "File Transfer Protocol",
257 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '21' },
260 "Finger protocol (RFC 742)",
261 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '79' },
264 "GNUnet secure peer-to-peer networking traffic",
265 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2086' },
266 { action
=> 'PARAM', proto
=> 'udp', dport
=> '2086' },
267 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1080' },
268 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1080' },
271 "Generic Routing Encapsulation tunneling protocol",
272 { action
=> 'PARAM', proto
=> '47' },
275 "Git distributed revision control traffic",
276 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9418' },
279 "OpenPGP HTTP keyserver protocol traffic",
280 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '11371' },
283 "Hypertext Transfer Protocol (WWW)",
284 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
287 "Hypertext Transfer Protocol (WWW) over SSL",
288 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
291 "Internet Cache Protocol V2 (Squid) traffic",
292 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3130' },
295 "AOL Instant Messenger traffic",
296 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5190' },
299 "Internet Message Access Protocol",
300 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '143' },
303 "Internet Message Access Protocol over SSL",
304 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '993' },
307 "IPIP capsulation traffic",
308 { action
=> 'PARAM', proto
=> '94' },
312 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
313 { action
=> 'PARAM', proto
=> '50' },
316 "IPsec authentication (AH) traffic",
317 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
318 { action
=> 'PARAM', proto
=> '51' },
321 "IPsec traffic and Nat-Traversal",
322 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500' },
323 { action
=> 'PARAM', proto
=> 'udp', dport
=> '4500' },
324 { action
=> 'PARAM', proto
=> '50' },
327 "Internet Relay Chat traffic",
328 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6667' },
331 "HP Jetdirect printing",
332 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9100' },
335 "Layer 2 Tunneling Protocol traffic",
336 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1701' },
339 "Lightweight Directory Access Protocol traffic",
340 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '389' },
343 "Secure Lightweight Directory Access Protocol traffic",
344 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '636' },
347 "Microsoft Notification Protocol",
348 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1863' },
351 "Microsoft SQL Server",
352 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1433' },
355 "Mail traffic (SMTP, SMTPS, Submission)",
356 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
357 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
358 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
362 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5353' },
365 "Munin networked resource monitoring traffic",
366 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '4949' },
370 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3306' },
373 "NNTP traffic (Usenet).",
374 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '119' },
377 "Encrypted NNTP traffic (Usenet)",
378 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '563' },
381 "Network Time Protocol (ntpd)",
382 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
385 "OSPF multicast traffic",
386 { action
=> 'PARAM', proto
=> '89' },
390 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1194' },
393 "Symantec PCAnywere (tm)",
394 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5632' },
395 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5631' },
399 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '110' },
402 "Encrypted POP3 traffic",
403 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '995' },
406 "Point-to-Point Tunneling Protocol",
407 { action
=> 'PARAM', proto
=> '47' },
408 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1723' },
412 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
416 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5432' },
419 "Line Printer protocol printing",
420 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '515' },
423 "Microsoft Remote Desktop Protocol traffic",
424 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3389' },
427 "Routing Information Protocol (bidirectional)",
428 { action
=> 'PARAM', proto
=> 'udp', dport
=> '520' },
431 "BIND remote management protocol",
432 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '953' },
435 "Razor Antispam System",
436 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2703' },
439 "Remote time retrieval (rdate)",
440 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
444 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '873' },
447 "SANE network scanning",
448 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6566' },
451 "Microsoft SMB traffic",
452 { action
=> 'PARAM', proto
=> 'udp', dport
=> '135,445' },
453 { action
=> 'PARAM', proto
=> 'udp', dport
=> '137:139' },
454 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
455 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '135,139,445' },
458 "Samba Web Administration Tool",
459 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '901' },
462 "Simple Mail Transfer Protocol",
463 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
466 "Encrypted Simple Mail Transfer Protocol",
467 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
470 "Simple Network Management Protocol",
471 { action
=> 'PARAM', proto
=> 'udp', dport
=> '161:162' },
472 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '161' },
475 "Spam Assassin SPAMD traffic",
476 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '783' },
479 "Secure shell traffic",
480 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '22' },
483 "Subversion server (svnserve)",
484 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3690' },
487 "SixXS IPv6 Deployment and Tunnel Broker",
488 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3874' },
489 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3740' },
490 { action
=> 'PARAM', proto
=> '41' },
491 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5072,8374' },
494 "Squid web proxy traffic",
495 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3128' },
498 "Mail message submission traffic",
499 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
502 "Syslog protocol (RFC 5424) traffic",
503 { action
=> 'PARAM', proto
=> 'udp', dport
=> '514' },
504 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '514' },
507 "Trivial File Transfer Protocol traffic",
508 { action
=> 'PARAM', proto
=> 'udp', dport
=> '69' },
512 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '23' },
516 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '992' },
519 "RFC 868 Time protocol",
520 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
523 "Traceroute (for up to 30 hops) traffic",
524 { action
=> 'PARAM', proto
=> 'udp', dport
=> '33434:33524' },
525 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
528 "VNC traffic for VNC display's 0 - 99",
529 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5900:5999' },
532 "VNC traffic from Vncservers to Vncviewers in listen mode",
533 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5500' },
536 "WWW traffic (HTTP and HTTPS)",
537 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
538 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
541 "Web Cache/Proxy traffic (port 8080)",
542 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '8080' },
546 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10000' },
549 "Whois (nicname, RFC 3912) traffic",
550 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '43' },
554 my $pve_fw_parsed_macros;
555 my $pve_fw_macro_descr;
556 my $pve_fw_macro_ipversion = {};
557 my $pve_fw_preferred_macro_names = {};
559 my $FWACCEPTMARK_ON = "0x80000000/0x80000000";
560 my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
562 my $pve_std_chains = {};
563 my $pve_std_chains_conf = {};
564 $pve_std_chains_conf->{4} = {
565 'PVEFW-SET-ACCEPT-MARK' => [
566 { target
=> "-j MARK --set-mark $FWACCEPTMARK_ON" },
568 'PVEFW-DropBroadcast' => [
569 # same as shorewall 'Broadcast'
570 # simply DROP BROADCAST/MULTICAST/ANYCAST
571 # we can use this to reduce logging
572 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
573 { action
=> 'DROP', dsttype
=> 'MULTICAST' },
574 { action
=> 'DROP', dsttype
=> 'ANYCAST' },
575 { action
=> 'DROP', dest
=> '224.0.0.0/4' },
578 # same as shorewall 'reject'
579 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
580 { action
=> 'DROP', source
=> '224.0.0.0/4' },
581 { action
=> 'DROP', proto
=> 'icmp' },
582 { match
=> '-p tcp', target
=> '-j REJECT --reject-with tcp-reset' },
583 { match
=> '-p udp', target
=> '-j REJECT --reject-with icmp-port-unreachable' },
584 { match
=> '-p icmp', target
=> '-j REJECT --reject-with icmp-host-unreachable' },
585 { target
=> '-j REJECT --reject-with icmp-host-prohibited' },
588 # same as shorewall 'Drop', which is equal to DROP,
589 # but REJECT/DROP some packages to reduce logging,
590 # and ACCEPT critical ICMP types
591 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
592 # we are not interested in BROADCAST/MULTICAST/ANYCAST
593 { action
=> 'PVEFW-DropBroadcast' },
594 # ACCEPT critical ICMP types
595 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
596 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
597 # Drop packets with INVALID state
598 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
599 # Drop Microsoft SMB noise
600 { action
=> 'DROP', proto
=> 'udp', dport
=> '135,445' },
601 { action
=> 'DROP', proto
=> 'udp', dport
=> '137:139' },
602 { action
=> 'DROP', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
603 { action
=> 'DROP', proto
=> 'tcp', dport
=> '135,139,445' },
604 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
605 # Drop new/NotSyn traffic so that it doesn't get logged
606 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
608 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
611 # same as shorewall 'Reject', which is equal to Reject,
612 # but REJECT/DROP some packages to reduce logging,
613 # and ACCEPT critical ICMP types
614 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
615 # we are not interested in BROADCAST/MULTICAST/ANYCAST
616 { action
=> 'PVEFW-DropBroadcast' },
617 # ACCEPT critical ICMP types
618 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
619 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
620 # Drop packets with INVALID state
621 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
622 # Drop Microsoft SMB noise
623 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '135,445' },
624 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '137:139'},
625 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
626 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '135,139,445' },
627 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
628 # Drop new/NotSyn traffic so that it doesn't get logged
629 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
631 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
633 'PVEFW-tcpflags' => [
634 # same as shorewall tcpflags action.
635 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
636 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target
=> '-g PVEFW-logflags' },
637 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target
=> '-g PVEFW-logflags' },
638 { match
=> '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target
=> '-g PVEFW-logflags' },
639 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target
=> '-g PVEFW-logflags' },
640 { match
=> '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target
=> '-g PVEFW-logflags' },
643 # same as shorewall smurfs action
644 # Filter packets for smurfs (packets with a broadcast address as the source).
645 { match
=> '-s 0.0.0.0/32', target
=> '-j RETURN' }, # allow DHCP
646 { match
=> '-m addrtype --src-type BROADCAST', target
=> '-g PVEFW-smurflog' },
647 { match
=> '-s 224.0.0.0/4', target
=> '-g PVEFW-smurflog' },
649 'PVEFW-smurflog' => [
650 { action
=> 'DROP', logmsg
=> 'DROP: ' },
652 'PVEFW-logflags' => [
653 { action
=> 'DROP', logmsg
=> 'DROP: ' },
657 $pve_std_chains_conf->{6} = {
658 'PVEFW-SET-ACCEPT-MARK' => [
659 { target
=> "-j MARK --set-mark $FWACCEPTMARK_ON" },
661 'PVEFW-DropBroadcast' => [
662 # same as shorewall 'Broadcast'
663 # simply DROP BROADCAST/MULTICAST/ANYCAST
664 # we can use this to reduce logging
665 #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
666 # ipv6 addrtype does not work with kernel 2.6.32
667 #{ action => 'DROP', dsttype => 'MULTICAST' },
668 #{ action => 'DROP', dsttype => 'ANYCAST' },
669 { action
=> 'DROP', dest
=> 'ff00::/8' },
670 #{ action => 'DROP', dest => '224.0.0.0/4' },
673 { action
=> 'DROP', proto
=> 'icmpv6' },
674 { match
=> '-p tcp', target
=> '-j REJECT --reject-with tcp-reset' },
675 { match
=> '-p udp', target
=> '-j REJECT --reject-with icmp6-port-unreachable' },
676 { target
=> '-j REJECT --reject-with icmp6-adm-prohibited' },
679 # same as shorewall 'Drop', which is equal to DROP,
680 # but REJECT/DROP some packages to reduce logging,
681 # and ACCEPT critical ICMP types
682 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
683 # we are not interested in BROADCAST/MULTICAST/ANYCAST
684 { action
=> 'PVEFW-DropBroadcast' },
685 # ACCEPT critical ICMP types
686 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'destination-unreachable' },
687 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'time-exceeded' },
688 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'packet-too-big' },
689 # Drop packets with INVALID state
690 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
691 # Drop Microsoft SMB noise
692 { action
=> 'DROP', proto
=> 'udp', dport
=> '135,445' },
693 { action
=> 'DROP', proto
=> 'udp', dport
=> '137:139'},
694 { action
=> 'DROP', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
695 { action
=> 'DROP', proto
=> 'tcp', dport
=> '135,139,445' },
696 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
697 # Drop new/NotSyn traffic so that it doesn't get logged
698 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
700 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
703 # same as shorewall 'Reject', which is equal to Reject,
704 # but REJECT/DROP some packages to reduce logging,
705 # and ACCEPT critical ICMP types
706 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
707 # we are not interested in BROADCAST/MULTICAST/ANYCAST
708 { action
=> 'PVEFW-DropBroadcast' },
709 # ACCEPT critical ICMP types
710 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'destination-unreachable' },
711 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'time-exceeded' },
712 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'packet-too-big' },
713 # Drop packets with INVALID state
714 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
715 # Drop Microsoft SMB noise
716 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '135,445' },
717 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '137:139' },
718 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
719 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '135,139,445' },
720 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
721 # Drop new/NotSyn traffic so that it doesn't get logged
722 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
724 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
726 'PVEFW-tcpflags' => [
727 # same as shorewall tcpflags action.
728 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
729 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target
=> '-g PVEFW-logflags' },
730 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target
=> '-g PVEFW-logflags' },
731 { match
=> '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target
=> '-g PVEFW-logflags' },
732 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target
=> '-g PVEFW-logflags' },
733 { match
=> '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target
=> '-g PVEFW-logflags' },
735 'PVEFW-logflags' => [
736 { action
=> 'DROP', logmsg
=> 'DROP: ' },
740 # iptables -p icmp -h
741 my $icmp_type_names = {
744 'destination-unreachable' => 1,
745 'network-unreachable' => 1,
746 'host-unreachable' => 1,
747 'protocol-unreachable' => 1,
748 'port-unreachable' => 1,
749 'fragmentation-needed' => 1,
750 'source-route-failed' => 1,
751 'network-unknown' => 1,
753 'network-prohibited' => 1,
754 'host-prohibited' => 1,
755 'TOS-network-unreachable' => 1,
756 'TOS-host-unreachable' => 1,
757 'communication-prohibited' => 1,
758 'host-precedence-violation' => 1,
759 'precedence-cutoff' => 1,
760 'source-quench' => 1,
762 'network-redirect' => 1,
763 'host-redirect' => 1,
764 'TOS-network-redirect' => 1,
765 'TOS-host-redirect' => 1,
767 'router-advertisement' => 1,
768 'router-solicitation' => 1,
769 'time-exceeded' => 1,
770 'ttl-zero-during-transit' => 1,
771 'ttl-zero-during-reassembly' => 1,
772 'parameter-problem' => 1,
773 'ip-header-bad' => 1,
774 'required-option-missing' => 1,
775 'timestamp-request' => 1,
776 'timestamp-reply' => 1,
777 'address-mask-request' => 1,
778 'address-mask-reply' => 1,
781 # ip6tables -p icmpv6 -h
783 my $icmpv6_type_names = {
785 'destination-unreachable' => 1,
787 'communication-prohibited' => 1,
788 'address-unreachable' => 1,
789 'port-unreachable' => 1,
790 'packet-too-big' => 1,
791 'time-exceeded' => 1,
792 'ttl-zero-during-transit' => 1,
793 'ttl-zero-during-reassembly' => 1,
794 'parameter-problem' => 1,
796 'unknown-header-type' => 1,
797 'unknown-option' => 1,
800 'router-solicitation' => 1,
801 'router-advertisement' => 1,
802 'neighbor-solicitation' => 1,
803 'neighbour-solicitation' => 1,
804 'neighbor-advertisement' => 1,
805 'neighbour-advertisement' => 1,
809 sub init_firewall_macros
{
811 $pve_fw_parsed_macros = {};
814 my ($k, $macro) = @_;
815 my $lc_name = lc($k);
816 $pve_fw_macro_ipversion->{$k} = 0;
817 while (!ref($macro->[0])) {
818 my $desc = shift @$macro;
819 if ($desc eq 'ipv4only') {
820 $pve_fw_macro_ipversion->{$k} = 4;
821 } elsif ($desc eq 'ipv6only') {
822 $pve_fw_macro_ipversion->{$k} = 6;
824 $pve_fw_macro_descr->{$k} = $desc;
827 $pve_fw_preferred_macro_names->{$lc_name} = $k;
828 $pve_fw_parsed_macros->{$k} = $macro;
831 foreach my $k (keys %$pve_fw_macros) {
832 &$parse($k, $pve_fw_macros->{$k});
835 foreach my $k (keys %$pve_ipv6fw_macros) {
836 next if $pve_fw_parsed_macros->{$k};
837 &$parse($k, $pve_ipv6fw_macros->{$k});
838 $pve_fw_macro_ipversion->{$k} = 6;
842 init_firewall_macros
();
845 return wantarray ?
($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
850 sub get_etc_services
{
852 return $etc_services if $etc_services;
854 my $filename = "/etc/services";
856 my $fh = IO
::File-
>new($filename, O_RDONLY
);
858 warn "unable to read '$filename' - $!\n";
864 while (my $line = <$fh>) {
866 next if $line =~m/^#/;
867 next if ($line =~m/^\s*$/);
869 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp|sctp).*$!) {
870 $services->{byid
}->{$2}->{name
} = $1;
871 $services->{byid
}->{$2}->{port
} = $2;
872 $services->{byid
}->{$2}->{$3} = 1;
873 $services->{byname
}->{$1} = $services->{byid
}->{$2};
879 $etc_services = $services;
882 return $etc_services;
885 sub parse_protocol_file
{
888 my $fh = IO
::File-
>new($filename, O_RDONLY
);
890 warn "unable to read '$filename' - $!\n";
896 while (my $line = <$fh>) {
898 next if $line =~m/^#/;
899 next if ($line =~m/^\s*$/);
901 if ($line =~ m!^(\S+)\s+(\d+)(?:\s+.*)?$!) {
902 $protocols->{byid
}->{$2}->{name
} = $1;
903 $protocols->{byname
}->{$1} = $protocols->{byid
}->{$2};
914 sub get_etc_protocols
{
915 return $etc_protocols if $etc_protocols;
917 my $protocols = parse_protocol_file
('/etc/protocols');
919 # add special case for ICMP v6
920 $protocols->{byid
}->{icmpv6
}->{name
} = "icmpv6";
921 $protocols->{byname
}->{icmpv6
} = $protocols->{byid
}->{icmpv6
};
923 $etc_protocols = $protocols;
925 return $etc_protocols;
930 sub get_etc_ethertypes
{
931 $etc_ethertypes = parse_protocol_file
('/etc/ethertypes')
933 return $etc_ethertypes;
939 my ($new_value) = @_;
941 $__local_network = $new_value if defined($new_value);
943 return $__local_network if defined($__local_network);
946 my $nodename = PVE
::INotify
::nodename
();
948 my $ip = PVE
::Cluster
::remote_node_ip
($nodename);
950 my $testip = Net
::IP-
>new($ip);
952 my $isv6 = $testip->version == 6;
953 my $routes = $isv6 ? PVE
::ProcFSTools
::read_proc_net_ipv6_route
()
954 : PVE
::ProcFSTools
::read_proc_net_route
();
955 foreach my $entry (@$routes) {
958 $mask = $entry->{prefix
};
959 next if !$mask; # skip the default route...
961 $mask = $PVE::Network
::ipv4_mask_hash_localnet-
>{$entry->{mask
}};
962 next if !defined($mask);
964 my $cidr = "$entry->{dest}/$mask";
965 my $testnet = Net
::IP-
>new($cidr);
966 my $overlap = $testnet->overlaps($testip);
967 if ($overlap == $Net::IP
::IP_B_IN_A_OVERLAP
||
968 $overlap == $Net::IP
::IP_IDENTICAL
)
970 $__local_network = $cidr;
977 return $__local_network;
980 # ipset names are limited to 31 characters,
981 # and we use '-v4' or '-v6' to indicate IP versions,
982 # and we use '_swap' suffix for atomic update,
983 # for example PVEFW-${VMID}-${ipset_name}_swap
985 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
987 sub compute_ipset_chain_name
{
988 my ($vmid, $ipset_name, $ipversion) = @_;
990 $vmid = 0 if !defined($vmid);
992 my $id = "$vmid-${ipset_name}-v$ipversion";
994 if (length($id) > $max_iptables_ipset_name_length) {
995 $id = PVE
::Tools
::fnv31a_hex
($id);
1001 sub compute_ipfilter_ipset_name
{
1004 return "ipfilter-$iface";
1007 sub parse_address_list
{
1010 if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
1011 die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
1015 if ($str =~ m/^${ip_alias_pattern}$/) {
1016 die "alias name too long\n" if length($str) > $max_alias_name_length;
1024 my @elements = split(/,/, $str);
1025 die "extraneous commas in list\n" if $str ne join(',', @elements);
1026 foreach my $elem (@elements) {
1028 my $ip = Net
::IP-
>new($elem);
1030 my $err = Net
::IP
::Error
();
1031 die "invalid IP address: $err\n";
1033 $iprange = 1 if $elem =~ m/-/;
1035 my $new_ipversion = Net
::IP
::ip_is_ipv6
($ip->ip()) ?
6 : 4;
1037 die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
1038 if $ipversion && ($new_ipversion != $ipversion);
1040 $ipversion = $new_ipversion;
1043 die "you can't use a range in a list\n" if $iprange && $count > 1;
1048 sub parse_port_name_number_or_range
{
1049 my ($str, $dport) = @_;
1051 my $services = PVE
::Firewall
::get_etc_services
();
1055 my @elements = split(/,/, $str);
1056 die "extraneous commas in list\n" if $str ne join(',', @elements);
1057 foreach my $item (@elements) {
1058 if ($item =~ m/^([0-9]+):([0-9]+)$/) {
1060 my ($port1, $port2) = ($1, $2);
1061 die "invalid port '$port1'\n" if $port1 > 65535;
1062 die "invalid port '$port2'\n" if $port2 > 65535;
1063 die "backwards range '$port1:$port2' not allowed, did you mean '$port2:$port1'?\n" if $port1 > $port2;
1064 } elsif ($item =~ m/^([0-9]+)$/) {
1067 die "invalid port '$port'\n" if $port > 65535;
1069 if ($dport && $icmp_type_names->{$item}) {
1071 } elsif ($dport && $icmpv6_type_names->{$item}) {
1074 die "invalid port '$item'\n" if !$services->{byname
}->{$item};
1079 die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 0;
1081 # I really don't like to use the word number here, but it's the only thing
1082 # that makes sense in a literal way. The range 1:100 counts as 2, not as
1083 # one and not as 100...
1084 die "too many entries in port list (> 15 numbers)\n"
1087 return (scalar(@elements) > 1);
1090 PVE
::JSONSchema
::register_format
('pve-fw-sport-spec', \
&pve_fw_verify_sport_spec
);
1091 sub pve_fw_verify_sport_spec
{
1094 parse_port_name_number_or_range
($portstr, 0);
1099 PVE
::JSONSchema
::register_format
('pve-fw-dport-spec', \
&pve_fw_verify_dport_spec
);
1100 sub pve_fw_verify_dport_spec
{
1103 parse_port_name_number_or_range
($portstr, 1);
1108 PVE
::JSONSchema
::register_format
('pve-fw-addr-spec', \
&pve_fw_verify_addr_spec
);
1109 sub pve_fw_verify_addr_spec
{
1112 parse_address_list
($list);
1117 PVE
::JSONSchema
::register_format
('pve-fw-protocol-spec', \
&pve_fw_verify_protocol_spec
);
1118 sub pve_fw_verify_protocol_spec
{
1121 my $protocols = get_etc_protocols
();
1123 die "unknown protocol '$proto'\n" if $proto &&
1124 !(defined($protocols->{byname
}->{$proto}) ||
1125 defined($protocols->{byid
}->{$proto}));
1131 # helper function for API
1133 sub copy_opject_with_digest
{
1136 my $sha = Digest
::SHA-
>new('sha1');
1139 foreach my $k (sort keys %$object) {
1140 my $v = $object->{$k};
1141 next if !defined($v);
1143 $sha->add($k, ':', $v, "\n");
1146 my $digest = $sha->hexdigest;
1148 $res->{digest
} = $digest;
1150 return wantarray ?
($res, $digest) : $res;
1153 sub copy_list_with_digest
{
1156 my $sha = Digest
::SHA-
>new('sha1');
1159 foreach my $entry (@$list) {
1161 foreach my $k (sort keys %$entry) {
1162 my $v = $entry->{$k};
1163 next if !defined($v);
1165 # Note: digest ignores refs ($rule->{errors})
1166 # since Digest::SHA expects a series of bytes,
1167 # we have to encode the value here to prevent errors when
1168 # using utf8 characters (eg. in comments)
1169 $sha->add($k, ':', encode_utf8
($v), "\n") if !ref($v); ;
1174 my $digest = $sha->hexdigest;
1176 foreach my $entry (@$res) {
1177 $entry->{digest
} = $digest;
1180 return wantarray ?
($res, $digest) : $res;
1183 our $cluster_option_properties = {
1185 description
=> "Enable or disable the firewall cluster wide.",
1191 description
=> "Enable ebtables rules cluster wide.",
1197 description
=> "Input policy.",
1200 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1203 description
=> "Output policy.",
1206 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1209 description
=> "Log ratelimiting settings",
1210 type
=> 'string', format
=> {
1213 description
=> 'Enable or disable log rate limiting',
1219 description
=> 'Frequency with which the burst bucket gets refilled',
1221 pattern
=> '[1-9][0-9]*\/(second|minute|hour|day)',
1222 format_description
=> 'rate',
1223 default => '1/second',
1229 description
=> 'Inital burst of packages which will get logged',
1237 our $host_option_properties = {
1239 description
=> "Enable host firewall rules.",
1243 log_level_in
=> get_standard_option
('pve-fw-loglevel', {
1244 description
=> "Log level for incoming traffic." }),
1245 log_level_out
=> get_standard_option
('pve-fw-loglevel', {
1246 description
=> "Log level for outgoing traffic." }),
1247 tcp_flags_log_level
=> get_standard_option
('pve-fw-loglevel', {
1248 description
=> "Log level for illegal tcp flags filter." }),
1249 smurf_log_level
=> get_standard_option
('pve-fw-loglevel', {
1250 description
=> "Log level for SMURFS filter." }),
1252 description
=> "Enable SMURFS filter.",
1257 description
=> "Filter illegal combinations of TCP flags.",
1261 nf_conntrack_max
=> {
1262 description
=> "Maximum number of tracked connections.",
1267 nf_conntrack_tcp_timeout_established
=> {
1268 description
=> "Conntrack established timeout.",
1274 description
=> "Enable NDP.",
1278 nf_conntrack_allow_invalid
=> {
1279 description
=> "Allow invalid packets on connection tracking.",
1284 log_nf_conntrack
=> {
1285 description
=> "Enable logging of conntrack information.",
1292 our $vm_option_properties = {
1294 description
=> "Enable/disable firewall rules.",
1299 description
=> "Enable/disable MAC address filter.",
1304 description
=> "Enable DHCP.",
1309 description
=> "Enable NDP.",
1314 description
=> "Allow sending Router Advertisement.",
1319 description
=> "Enable default IP filters. " .
1320 "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1321 "for every interface. Such ipsets implicitly contain sane default " .
1322 "restrictions such as restricting IPv6 link local addresses to " .
1323 "the one derived from the interface's MAC address. For containers " .
1324 "the configured IP addresses will be implicitly added.",
1329 description
=> "Input policy.",
1332 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1335 description
=> "Output policy.",
1338 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1340 log_level_in
=> get_standard_option
('pve-fw-loglevel', {
1341 description
=> "Log level for incoming traffic." }),
1342 log_level_out
=> get_standard_option
('pve-fw-loglevel', {
1343 description
=> "Log level for outgoing traffic." }),
1348 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.";
1350 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.";
1352 my $rule_properties = {
1354 description
=> "Update rule at position <pos>.",
1359 digest
=> get_standard_option
('pve-config-digest'),
1361 description
=> "Rule type.",
1364 enum
=> ['in', 'out', 'group'],
1367 description
=> "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1370 pattern
=> $security_group_name_pattern,
1375 description
=> "Use predefined standard macro.",
1380 iface
=> get_standard_option
('pve-iface', {
1381 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.",
1385 description
=> "Restrict packet source address. $addr_list_descr",
1386 type
=> 'string', format
=> 'pve-fw-addr-spec',
1390 description
=> "Restrict packet destination address. $addr_list_descr",
1391 type
=> 'string', format
=> 'pve-fw-addr-spec',
1395 description
=> "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1396 type
=> 'string', format
=> 'pve-fw-protocol-spec',
1400 description
=> "Flag to enable/disable a rule.",
1405 log => get_standard_option
('pve-fw-loglevel', {
1406 description
=> "Log level for firewall rule.",
1409 description
=> "Restrict TCP/UDP source port. $port_descr",
1410 type
=> 'string', format
=> 'pve-fw-sport-spec',
1414 description
=> "Restrict TCP/UDP destination port. $port_descr",
1415 type
=> 'string', format
=> 'pve-fw-dport-spec',
1419 description
=> "Descriptive comment.",
1425 sub add_rule_properties
{
1426 my ($properties) = @_;
1428 foreach my $k (keys %$rule_properties) {
1429 my $h = $rule_properties->{$k};
1430 # copy data, so that we can modify later without side effects
1431 foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1437 sub delete_rule_properties
{
1438 my ($rule, $delete_str) = @_;
1440 foreach my $opt (PVE
::Tools
::split_list
($delete_str)) {
1441 raise_param_exc
({ 'delete' => "no such property ('$opt')"})
1442 if !defined($rule_properties->{$opt});
1443 raise_param_exc
({ 'delete' => "unable to delete required property '$opt'"})
1444 if $opt eq 'type' || $opt eq 'action';
1445 delete $rule->{$opt};
1451 my $apply_macro = sub {
1452 my ($macro_name, $param, $verify, $ipversion) = @_;
1454 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1455 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1457 if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1458 $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1461 # skip macros which are specific to another ipversion
1462 if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1463 return if $ipversion != $required;
1468 foreach my $templ (@$macro_rules) {
1470 my $param_used = {};
1471 foreach my $k (keys %$templ) {
1472 my $v = $templ->{$k};
1473 if ($v eq 'PARAM') {
1475 $param_used->{$k} = 1;
1476 } elsif ($v eq 'DEST') {
1477 $v = $param->{dest
};
1478 $param_used->{dest
} = 1;
1479 } elsif ($v eq 'SOURCE') {
1480 $v = $param->{source
};
1481 $param_used->{source
} = 1;
1485 my $msg = "missing parameter '$k' in macro '$macro_name'";
1486 raise_param_exc
({ macro => $msg }) if $verify;
1491 foreach my $k (keys %$param) {
1492 next if $k eq 'macro';
1493 next if !defined($param->{$k});
1494 next if $param_used->{$k};
1495 if (defined($rule->{$k})) {
1496 if ($rule->{$k} ne $param->{$k}) {
1497 my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1498 raise_param_exc
({ $k => $msg }) if $verify;
1502 $rule->{$k} = $param->{$k};
1505 push @$rules, $rule;
1511 my $rule_env_iface_lookup = {
1520 my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1522 my $allow_groups = $rule_env eq 'group' ?
0 : 1;
1524 my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1525 die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1527 my $errors = $rule->{errors
} || {};
1529 my $error_count = 0;
1531 my $add_error = sub {
1532 my ($param, $msg) = @_;
1534 raise_param_exc
({ $param => $msg }) if !$noerr;
1536 $errors->{$param} = $msg if !$errors->{$param};
1540 my $set_ip_version = sub {
1543 die "detected mixed ipv4/ipv6 adresses in rule\n"
1544 if $ipversion && ($vers != $ipversion);
1549 my $check_ipset_or_alias_property = sub {
1550 my ($name, $expected_ipversion) = @_;
1552 if (my $value = $rule->{$name}) {
1553 if ($value =~ m/^\+/) {
1554 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1555 &$add_error($name, "no such ipset '$1'")
1556 if !($cluster_conf->{ipset
}->{$1} || ($fw_conf && $fw_conf->{ipset
}->{$1}));
1559 &$add_error($name, "invalid ipset name '$value'");
1561 } elsif ($value =~ m/^${ip_alias_pattern}$/){
1562 my $alias = lc($value);
1563 &$add_error($name, "no such alias '$value'")
1564 if !($cluster_conf->{aliases
}->{$alias} || ($fw_conf && $fw_conf->{aliases
}->{$alias}));
1565 my $e = $fw_conf ?
$fw_conf->{aliases
}->{$alias} : undef;
1566 $e = $cluster_conf->{aliases
}->{$alias} if !$e && $cluster_conf;
1568 &$set_ip_version($e->{ipversion
});
1573 my $type = $rule->{type
};
1574 my $action = $rule->{action
};
1576 &$add_error('type', "missing property") if !$type;
1577 &$add_error('action', "missing property") if !$action;
1580 if ($type eq 'in' || $type eq 'out') {
1581 &$add_error('action', "unknown action '$action'")
1582 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1583 } elsif ($type eq 'group') {
1584 &$add_error('type', "security groups not allowed")
1586 &$add_error('action', "invalid characters in security group name")
1587 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1589 &$add_error('type', "unknown rule type '$type'");
1593 if ($rule->{iface
}) {
1594 &$add_error('type', "parameter -i not allowed for this rule type")
1596 eval { PVE
::JSONSchema
::pve_verify_iface
($rule->{iface
}); };
1597 &$add_error('iface', $@) if $@;
1598 if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1599 &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1600 if $rule->{iface
} !~ m/^net(\d+)$/;
1604 if ($rule->{macro}) {
1605 if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1606 $rule->{macro} = $preferred_name;
1608 &$add_error('macro', "unknown macro '$rule->{macro}'");
1612 if ($rule->{proto
}) {
1613 eval { pve_fw_verify_protocol_spec
($rule->{proto
}); };
1614 &$add_error('proto', $@) if $@;
1615 &$set_ip_version(4) if $rule->{proto
} eq 'icmp';
1616 &$set_ip_version(6) if $rule->{proto
} eq 'icmpv6';
1619 if ($rule->{dport
}) {
1620 eval { parse_port_name_number_or_range
($rule->{dport
}, 1); };
1621 &$add_error('dport', $@) if $@;
1622 my $proto = $rule->{proto
};
1623 &$add_error('proto', "missing property - 'dport' requires this property")
1625 &$add_error('dport', "protocol '$proto' does not support ports")
1626 if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1627 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1630 if ($rule->{sport
}) {
1631 eval { parse_port_name_number_or_range
($rule->{sport
}, 0); };
1632 &$add_error('sport', $@) if $@;
1633 my $proto = $rule->{proto
};
1634 &$add_error('proto', "missing property - 'sport' requires this property")
1636 &$add_error('sport', "protocol '$proto' does not support ports")
1637 if !$PROTOCOLS_WITH_PORTS->{$proto};
1640 if ($rule->{source
}) {
1642 my $source_ipversion = parse_address_list
($rule->{source
});
1643 &$set_ip_version($source_ipversion);
1645 &$add_error('source', $@) if $@;
1646 &$check_ipset_or_alias_property('source', $ipversion);
1649 if ($rule->{dest
}) {
1651 my $dest_ipversion = parse_address_list
($rule->{dest
});
1652 &$set_ip_version($dest_ipversion);
1654 &$add_error('dest', $@) if $@;
1655 &$check_ipset_or_alias_property('dest', $ipversion);
1658 $rule->{ipversion
} = $ipversion if $ipversion;
1660 if ($rule->{macro} && !$error_count) {
1661 eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1663 if (ref($err) eq "PVE::Exception" && $err->{errors
}) {
1664 my $eh = $err->{errors
};
1665 foreach my $p (keys %$eh) {
1666 &$add_error($p, $eh->{$p});
1669 &$add_error('macro', "$err");
1674 $rule->{errors
} = $errors if $error_count;
1679 sub copy_rule_data
{
1680 my ($rule, $param) = @_;
1682 foreach my $k (keys %$rule_properties) {
1683 if (defined(my $v = $param->{$k})) {
1684 if ($v eq '' || $v eq '-') {
1695 sub rules_modify_permissions
{
1696 my ($rule_env) = @_;
1698 if ($rule_env eq 'host') {
1700 check
=> ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1702 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1704 check
=> ['perm', '/', [ 'Sys.Modify' ]],
1706 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1708 check
=> ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1715 sub rules_audit_permissions
{
1716 my ($rule_env) = @_;
1718 if ($rule_env eq 'host') {
1720 check
=> ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1722 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1724 check
=> ['perm', '/', [ 'Sys.Audit' ]],
1726 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1728 check
=> ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1736 my $bridge_firewall_enabled = 0;
1738 sub enable_bridge_firewall
{
1740 return if $bridge_firewall_enabled; # only once
1742 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1743 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1745 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1746 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/ipv4/tcp_syncookies", "1");
1748 $bridge_firewall_enabled = 1;
1751 sub iptables_restore_cmdlist
{
1754 run_command
(['iptables-restore', '-n'], input
=> $cmdlist, errmsg
=> "iptables_restore_cmdlist");
1757 sub ip6tables_restore_cmdlist
{
1760 run_command
(['ip6tables-restore', '-n'], input
=> $cmdlist, errmsg
=> "iptables_restore_cmdlist");
1763 sub ipset_restore_cmdlist
{
1766 run_command
(['ipset', 'restore'], input
=> $cmdlist, errmsg
=> "ipset_restore_cmdlist");
1769 sub ebtables_restore_cmdlist
{
1772 run_command
(['ebtables-restore'], input
=> $cmdlist, errmsg
=> "ebtables_restore_cmdlist");
1775 sub iptables_get_chains
{
1776 my ($iptablescmd) = @_;
1778 $iptablescmd = "iptables" if !$iptablescmd;
1782 # check what chains we want to track
1783 my $is_pvefw_chain = sub {
1786 return 1 if $name =~ m/^PVEFW-\S+$/;
1788 return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1790 return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1792 return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1793 return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1805 return if $line =~ m/^#/;
1806 return if $line =~ m/^\s*$/;
1808 if ($line =~ m/^\*(\S+)$/) {
1813 return if $table ne 'filter';
1815 if ($line =~ m/^:(\S+)\s/) {
1817 return if !&$is_pvefw_chain($chain);
1818 $res->{$chain} = "unknown";
1819 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1820 my ($chain, $sig) = ($1, $2);
1821 return if !&$is_pvefw_chain($chain);
1822 $res->{$chain} = $sig;
1823 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1826 # simply ignore the rest
1831 run_command
(["$iptablescmd-save"], outfunc
=> $parser);
1833 return wantarray ?
($res, $hooks) : $res;
1836 sub iptables_chain_digest
{
1838 my $digest = Digest
::SHA-
>new('sha1');
1839 foreach my $rule (@$rules) { # order is important
1840 $digest->add($rule);
1842 return $digest->b64digest;
1845 sub ipset_chain_digest
{
1848 my $digest = Digest
::SHA-
>new('sha1');
1849 foreach my $rule (sort @$rules) { # note: sorted
1850 $digest->add($rule);
1852 return $digest->b64digest;
1855 sub ipset_get_chains
{
1863 return if $line =~ m/^#/;
1864 return if $line =~ m/^\s*$/;
1865 if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1867 $line =~ s/\s+$//; # delete trailing white space
1868 push @{$chains->{$chain}}, $line;
1870 # simply ignore the rest
1875 run_command
(['ipset', 'save'], outfunc
=> $parser);
1877 # compute digest for each chain
1878 foreach my $chain (keys %$chains) {
1879 $res->{$chain} = ipset_chain_digest
($chains->{$chain});
1885 sub ebtables_get_chains
{
1891 return if $line =~ m/^#/;
1892 return if $line =~ m/^\s*$/;
1893 if ($line =~ m/^:(\S+)\s\S+$/) {
1894 # Make sure we know chains exist even if they're empty.
1895 $chains->{$1} //= [];
1896 } elsif ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
1899 push @{$chains->{$chain}}, $line;
1901 # simply ignore the rest
1906 run_command
(['ebtables-save'], outfunc
=> $parser);
1907 # compute digest for each chain and store rules as well
1908 foreach my $chain (keys %$chains) {
1909 $res->{$chain}->{rules
} = $chains->{$chain};
1910 $res->{$chain}->{sig
} = iptables_chain_digest
($chains->{$chain});
1915 # substitude action of rule according to action hash
1916 sub rule_substitude_action
{
1917 my ($rule, $actions) = @_;
1919 if (my $action = $rule->{action
}) {
1920 $rule->{action
} = $actions->{$action} if defined($actions->{$action});
1924 # generate a src or dst match
1925 # $dir(ection) is either d or s
1926 sub ipt_gen_src_or_dst_match
{
1927 my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
1932 } elsif ($dir eq 'd') {
1935 die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
1939 if ($adr =~ m/^\+/) {
1940 if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
1943 if ($fw_conf && $fw_conf->{ipset
}->{$name}) {
1944 $ipset_chain = compute_ipset_chain_name
($fw_conf->{vmid
}, $name, $ipversion);
1945 } elsif ($cluster_conf && $cluster_conf->{ipset
}->{$name}) {
1946 $ipset_chain = compute_ipset_chain_name
(0, $name, $ipversion);
1948 die "no such ipset '$name'\n";
1950 $match = "-m set --match-set ${ipset_chain} ${srcdst}";
1952 die "invalid security group name '$adr'\n";
1954 } elsif ($adr =~ m/^${ip_alias_pattern}$/){
1955 my $alias = lc($adr);
1956 my $e = $fw_conf ?
$fw_conf->{aliases
}->{$alias} : undef;
1957 $e = $cluster_conf->{aliases
}->{$alias} if !$e && $cluster_conf;
1958 die "no such alias '$adr'\n" if !$e;
1959 $match = "-${dir} $e->{cidr}";
1960 } elsif ($adr =~ m/\-/){
1961 $match = "-m iprange --${srcdst}-range $adr";
1963 $match = "-${dir} $adr";
1969 # convert a %rule to an array of iptables commands
1970 sub ipt_rule_to_cmds
{
1971 my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
1973 die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
1977 if (defined $rule->{match
}) {
1978 push @match, $rule->{match
};
1980 push @match, "-i $rule->{iface_in}" if $rule->{iface_in
};
1981 push @match, "-o $rule->{iface_out}" if $rule->{iface_out
};
1983 if ($rule->{source
}) {
1984 push @match, ipt_gen_src_or_dst_match
($rule->{source
}, 's', $ipversion, $cluster_conf, $fw_conf);
1986 if ($rule->{dest
}) {
1987 push @match, ipt_gen_src_or_dst_match
($rule->{dest
}, 'd', $ipversion, $cluster_conf, $fw_conf);
1990 if (my $proto = $rule->{proto
}) {
1991 push @match, "-p $proto";
1993 my $multidport = defined($rule->{dport
}) && parse_port_name_number_or_range
($rule->{dport
}, 1);
1994 my $multisport = defined($rule->{sport
}) && parse_port_name_number_or_range
($rule->{sport
}, 0);
1996 my $add_dport = sub {
1997 return if !$rule->{dport
};
1999 if ($proto eq 'icmp') {
2000 # Note: we use dport to store --icmp-type
2001 die "unknown icmp-type '$rule->{dport}'\n"
2002 if $rule->{dport
} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport
}});
2003 push @match, "-m icmp --icmp-type $rule->{dport}";
2004 } elsif ($proto eq 'icmpv6') {
2005 # Note: we use dport to store --icmpv6-type
2006 die "unknown icmpv6-type '$rule->{dport}'\n"
2007 if $rule->{dport
} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport
}});
2008 push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
2009 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
2010 die "protocol $proto does not have ports\n";
2011 } elsif ($multidport) {
2012 push @match, "--match multiport", "--dports $rule->{dport}";
2014 push @match, "--dport $rule->{dport}";
2018 my $add_sport = sub {
2019 return if !$rule->{sport
};
2021 die "protocol $proto does not have ports\n"
2022 if !$PROTOCOLS_WITH_PORTS->{$proto};
2024 push @match, "--match multiport", "--sports $rule->{sport}";
2026 push @match, "--sport $rule->{sport}";
2030 # order matters - single port before multiport!
2031 $add_dport->() if $multisport;
2033 $add_dport->() if !$multisport;
2034 } elsif ($rule->{dport
} || $rule->{sport
}) {
2035 die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport
};
2036 die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport
};
2039 push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype
};
2041 my $matchstr = scalar(@match) ?
join(' ', @match) : "";
2044 if (defined $rule->{target
}) {
2045 $targetstr = $rule->{target
};
2047 my $action = (defined $rule->{action
}) ?
$rule->{action
} : "";
2048 my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
2049 $targetstr = ($goto) ?
"-g $action" : "-j $action";
2053 my $log = $rule->{log};
2054 if (defined($log) && $log ne 'nolog') {
2055 my $loglevel = $log_level_hash->{$log};
2056 my $logaction = get_log_rule_base
($chain, $vmid, $rule->{logmsg
}, $loglevel);
2057 push @iptcmds, "-A $chain $matchstr $logaction";
2059 push @iptcmds, "-A $chain $matchstr $targetstr";
2063 sub ruleset_generate_rule
{
2064 my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf, $vmid) = @_;
2068 if ($rule->{macro}) {
2069 $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
2074 # update all or nothing
2076 foreach my $r (@$rules) {
2077 push @ipt_rule_cmds, ipt_rule_to_cmds
($r, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid);
2079 foreach my $c (@ipt_rule_cmds) {
2080 ruleset_add_ipt_cmd
($ruleset, $chain, $c);
2084 sub ruleset_create_chain
{
2085 my ($ruleset, $chain) = @_;
2087 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
2088 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
2090 die "chain '$chain' already exists\n" if $ruleset->{$chain};
2092 $ruleset->{$chain} = [];
2095 sub ruleset_chain_exist
{
2096 my ($ruleset, $chain) = @_;
2098 return $ruleset->{$chain} ?
1 : undef;
2101 # add an iptables command (like generated by ipt_rule_to_cmds) to a chain
2102 sub ruleset_add_ipt_cmd
{
2103 my ($ruleset, $chain, $iptcmd) = @_;
2105 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2107 push @{$ruleset->{$chain}}, $iptcmd;
2110 sub ruleset_addrule
{
2111 my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
2113 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2116 my $loglevel = $log_level_hash->{$log};
2117 my $logaction = get_log_rule_base
($chain, $vmid, $logmsg, $loglevel);
2118 push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
2120 # for stable ebtables digests avoid double-spaces to match ebtables-save output
2121 $match .= ' ' if length($match);
2122 push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
2125 sub ruleset_insertrule
{
2126 my ($ruleset, $chain, $match, $action, $log) = @_;
2128 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2130 unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2133 sub get_log_rule_base
{
2134 my ($chain, $vmid, $msg, $loglevel) = @_;
2136 $vmid = 0 if !defined($vmid);
2137 $msg = "" if !defined($msg);
2140 if (defined($global_log_ratelimit)) {
2141 $rlimit = "-m limit $global_log_ratelimit ";
2144 # Note: we use special format for prefix to pass further
2145 # info to log daemon (VMID, LOGLEVEL and CHAIN)
2146 return "${rlimit}-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2149 sub ruleset_add_chain_policy {
2150 my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2152 if ($policy eq 'ACCEPT') {
2154 my $rule = { action => 'ACCEPT' };
2155 rule_substitude_action($rule, { ACCEPT => $accept_action});
2156 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2158 } elsif ($policy eq 'DROP') {
2160 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop
");
2162 ruleset_addrule($ruleset, $chain, "", "-j DROP
", $loglevel, "policy
$policy: ", $vmid);
2163 } elsif ($policy eq 'REJECT') {
2164 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject
");
2166 ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject
", $loglevel, "policy
$policy: ", $vmid);
2169 die "internal error
: unknown policy
'$policy'";
2173 sub ruleset_chain_add_ndp {
2174 my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2175 return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2177 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-solicitation
", $accept);
2178 if ($direction ne 'OUT' || $options->{radv}) {
2179 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-advertisement
", $accept);
2181 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type neighbor-solicitation
", $accept);
2182 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type neighbor-advertisement
", $accept);
2185 sub ruleset_chain_add_conn_filters {
2186 my ($ruleset, $chain, $allow_invalid, $accept) = @_;
2188 if (!$allow_invalid) {
2189 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
", "-j DROP
");
2191 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
", "-j
$accept");
2194 sub ruleset_chain_add_input_filters {
2195 my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2197 if ($cluster_conf->{ipset}->{blacklist}){
2198 if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist
")) {
2199 ruleset_create_chain($ruleset, "PVEFW-blacklist
");
2200 ruleset_addrule($ruleset, "PVEFW-blacklist
", "", "-j DROP
", $loglevel, "DROP
: ", 0);
2202 my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2203 ruleset_addrule($ruleset, $chain, "-m set
--match-set
${ipset_chain
} src
", "-j PVEFW-blacklist
");
2206 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2207 if ($ipversion == 4) {
2208 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
,NEW
", "-j PVEFW-smurfs
");
2212 if ($options->{tcpflags}) {
2213 ruleset_addrule($ruleset, $chain, "-p tcp
", "-j PVEFW-tcpflags
");
2217 sub ruleset_create_vm_chain {
2218 my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2220 ruleset_create_chain($ruleset, $chain);
2221 my $accept = generate_nfqueue($options);
2223 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2224 if ($ipversion == 4) {
2225 if ($direction eq 'OUT') {
2226 ruleset_generate_rule($ruleset, $chain, $ipversion,
2227 { action => 'PVEFW-SET-ACCEPT-MARK',
2228 proto => 'udp', sport => 68, dport => 67 });
2230 ruleset_generate_rule($ruleset, $chain, $ipversion,
2231 { action => 'ACCEPT',
2232 proto => 'udp', sport => 67, dport => 68 });
2234 } elsif ($ipversion == 6) {
2235 if ($direction eq 'OUT') {
2236 ruleset_generate_rule($ruleset, $chain, $ipversion,
2237 { action => 'PVEFW-SET-ACCEPT-MARK',
2238 proto => 'udp', sport => 546, dport => 547 });
2240 ruleset_generate_rule($ruleset, $chain, $ipversion,
2241 { action => 'ACCEPT',
2242 proto => 'udp', sport => 547, dport => 546 });
2248 if ($direction eq 'OUT') {
2249 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2250 ruleset_addrule($ruleset, $chain, "-m mac
! --mac-source
$macaddr", "-j DROP
");
2252 if ($ipversion == 6 && !$options->{radv}) {
2253 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-advertisement
", "-j DROP
");
2255 if ($ipfilter_ipset) {
2256 ruleset_addrule($ruleset, $chain, "-m set
! --match-set
$ipfilter_ipset src
", "-j DROP
");
2258 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2261 my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j
$accept";
2262 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2265 sub ruleset_add_group_rule {
2266 my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2268 my $group = $rule->{action};
2269 my $group_chain = "GROUP-
$group-$direction";
2270 if(!ruleset_chain_exist($ruleset, $group_chain)){
2271 generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2274 if ($direction eq 'OUT' && $rule->{iface_out}) {
2275 ruleset_addrule($ruleset, $chain, "-o
$rule->{iface_out
}", "-j
$group_chain");
2276 } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2277 ruleset_addrule($ruleset, $chain, "-i
$rule->{iface_in
}", "-j
$group_chain");
2279 ruleset_addrule($ruleset, $chain, "", "-j
$group_chain");
2282 ruleset_addrule($ruleset, $chain, "-m mark
--mark
$FWACCEPTMARK_ON", "-j
$action");
2285 sub ruleset_generate_vm_rules {
2286 my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion, $vmid) = @_;
2288 my $lc_direction = lc($direction);
2290 my $in_accept = generate_nfqueue($options);
2292 foreach my $rule (@$rules) {
2293 next if $rule->{iface} && $rule->{iface} ne $netid;
2294 next if !$rule->{enable} || $rule->{errors};
2295 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2297 if ($rule->{type} eq 'group') {
2298 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2299 $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2301 next if $rule->{type} ne $lc_direction;
2303 $rule->{logmsg} = "$rule->{action
}: ";
2304 if ($direction eq 'OUT') {
2305 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" });
2306 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2308 rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject
" });
2309 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2317 sub generate_nfqueue {
2320 if ($options->{ips}) {
2321 my $action = "NFQUEUE
";
2322 if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2323 if (defined($3) && defined($1)) {
2324 $action .= " --queue-balance
$1:$3";
2325 } elsif (defined($1)) {
2326 $action .= " --queue-num
$1";
2329 $action .= " --queue-bypass
" if $feature_ipset_nomatch; #need kernel 3.10
2336 sub ruleset_generate_vm_ipsrules {
2337 my ($ruleset, $options, $direction, $iface) = @_;
2339 if ($options->{ips} && $direction eq 'IN') {
2340 my $nfqueue = generate_nfqueue($options);
2342 if (!ruleset_chain_exist($ruleset, "PVEFW-IPS
")) {
2343 ruleset_create_chain($ruleset, "PVEFW-IPS
");
2346 ruleset_addrule($ruleset, "PVEFW-IPS
", "-m physdev
--physdev-out
$iface --physdev-is-bridged
", "-j
$nfqueue");
2350 sub generate_tap_rules_direction {
2351 my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2353 my $lc_direction = lc($direction);
2355 my $rules = $vmfw_conf->{rules};
2357 my $options = $vmfw_conf->{options};
2358 my $loglevel = get_option_log_level($options, "log_level_
${lc_direction
}");
2360 my $tapchain = "$iface-$direction";
2362 my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2363 my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2364 if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2366 if ($options->{enable}) {
2367 # create chain with mac and ip filter
2368 ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2370 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion, $vmid);
2372 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2377 if ($direction eq 'OUT') {
2378 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2380 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2383 my $accept = generate_nfqueue($options);
2384 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : $accept;
2385 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2387 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : 'ACCEPT';
2388 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2391 # plug the tap chain to bridge chain
2392 if ($direction eq 'IN') {
2393 ruleset_addrule($ruleset, "PVEFW-FWBR-IN
",
2394 "-m physdev
--physdev-is-bridged
--physdev-out
$iface", "-j
$tapchain");
2396 ruleset_addrule($ruleset, "PVEFW-FWBR-OUT
",
2397 "-m physdev
--physdev-is-bridged
--physdev-in
$iface", "-j
$tapchain");
2401 sub enable_host_firewall {
2402 my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf) = @_;
2404 my $options = $hostfw_conf->{options};
2405 my $cluster_options = $cluster_conf->{options};
2406 my $rules = $hostfw_conf->{rules};
2407 my $cluster_rules = $cluster_conf->{rules};
2409 # corosync preparation
2410 my $corosync_rule = "-p udp
--dport
5404:5405";
2411 my $corosync_local_addresses = {};
2412 my $multicast_enabled;
2413 my $local_hostname = PVE::INotify::nodename();
2414 if (defined($corosync_conf)) {
2415 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2416 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2418 if ($node_name eq $local_hostname) {
2419 $corosync_local_addresses->{$key} = $node_ip;
2423 # allow multicast only if enabled in config
2424 my $corosync_transport = $corosync_conf->{main}->{totem}->{transport};
2425 $multicast_enabled = defined($corosync_transport) && $corosync_transport eq 'udp';
2428 # host inbound firewall
2429 my $chain = "PVEFW-HOST-IN
";
2430 ruleset_create_chain($ruleset, $chain);
2432 my $loglevel = get_option_log_level($options, "log_level_in
");
2434 ruleset_addrule($ruleset, $chain, "-i lo
", "-j ACCEPT
");
2436 ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2437 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2438 ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2440 # we use RETURN because we need to check also tap rules
2441 my $accept_action = 'RETURN';
2443 ruleset_addrule($ruleset, $chain, "-p igmp
", "-j
$accept_action"); # important for multicast
2445 # add host rules first, so that cluster wide rules can be overwritten
2446 foreach my $rule (@$rules, @$cluster_rules) {
2447 next if !$rule->{enable} || $rule->{errors};
2448 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2450 $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2453 if ($rule->{type} eq 'group') {
2454 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2455 } elsif ($rule->{type} eq 'in') {
2456 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" });
2457 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2461 delete $rule->{iface_in};
2464 # allow standard traffic for management ipset (includes cluster network)
2465 my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management
", $ipversion);
2466 my $mngmntsrc = "-m set
--match-set
${mngmnt_ipset_chain
} src
";
2467 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
8006", "-j
$accept_action"); # PVE API
2468 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
5900:5999", "-j
$accept_action"); # PVE VNC Console
2469 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
3128", "-j
$accept_action"); # SPICE Proxy
2470 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
22", "-j
$accept_action"); # SSH
2472 # corosync inbound rules
2473 if (defined($corosync_conf)) {
2474 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
$corosync_rule", "-j
$accept_action")
2475 if $multicast_enabled;
2477 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2478 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2479 my $destination = $corosync_local_addresses->{$key};
2481 if ($node_name ne $local_hostname && defined($destination)) {
2482 # accept only traffic on same ring
2483 ruleset_addrule($ruleset, $chain, "-d
$destination -s
$node_ip $corosync_rule", "-j
$accept_action");
2488 # implement input policy
2489 my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2490 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2492 # host outbound firewall
2493 $chain = "PVEFW-HOST-OUT
";
2494 ruleset_create_chain($ruleset, $chain);
2496 $loglevel = get_option_log_level($options, "log_level_out
");
2498 ruleset_addrule($ruleset, $chain, "-o lo
", "-j ACCEPT
");
2500 ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2502 # we use RETURN because we may want to check other thigs later
2503 $accept_action = 'RETURN';
2504 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j
$accept_action");
2506 ruleset_addrule($ruleset, $chain, "-p igmp
", "-j
$accept_action"); # important for multicast
2508 # add host rules first, so that cluster wide rules can be overwritten
2509 foreach my $rule (@$rules, @$cluster_rules) {
2510 next if !$rule->{enable} || $rule->{errors};
2511 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2513 $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2515 $rule->{logmsg} = "$rule->{action
}: ";
2516 if ($rule->{type} eq 'group') {
2517 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2518 } elsif ($rule->{type} eq 'out') {
2519 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" });
2520 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2524 delete $rule->{iface_out};
2527 # allow standard traffic on cluster network
2528 my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2529 my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2531 if ($localnet && ($ipversion == $localnet_ver)) {
2532 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
8006", "-j
$accept_action"); # PVE API
2533 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
22", "-j
$accept_action"); # SSH
2534 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
5900:5999", "-j
$accept_action"); # PVE VNC Console
2535 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
3128", "-j
$accept_action"); # SPICE Proxy
2538 # corosync outbound rules
2539 if (defined($corosync_conf)) {
2540 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
$corosync_rule", "-j
$accept_action")
2541 if $multicast_enabled;
2543 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2544 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2545 my $source = $corosync_local_addresses->{$key};
2547 if ($node_name ne $local_hostname && defined($source)) {
2548 # accept only traffic on same ring
2549 ruleset_addrule($ruleset, $chain, "-s
$source -d
$node_ip $corosync_rule", "-j
$accept_action");
2554 # implement output policy
2555 $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2556 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2558 ruleset_addrule($ruleset, "PVEFW-OUTPUT
", "", "-j PVEFW-HOST-OUT
");
2559 ruleset_addrule($ruleset, "PVEFW-INPUT
", "", "-j PVEFW-HOST-IN
");
2562 sub generate_group_rules {
2563 my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2565 my $rules = $cluster_conf->{groups}->{$group};
2568 warn "no such security group
'$group'\n";
2569 $rules = []; # create empty chain
2572 my $chain = "GROUP-
${group
}-IN
";
2574 ruleset_create_chain($ruleset, $chain);
2575 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2577 foreach my $rule (@$rules) {
2578 next if $rule->{type} ne 'in';
2579 next if !$rule->{enable} || $rule->{errors};
2580 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2581 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" });
2582 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2585 $chain = "GROUP-
${group
}-OUT
";
2587 ruleset_create_chain($ruleset, $chain);
2588 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2590 foreach my $rule (@$rules) {
2591 next if $rule->{type} ne 'out';
2592 next if !$rule->{enable} || $rule->{errors};
2593 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2594 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2595 # check also other tap rules later
2596 rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject
" });
2597 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2602 my $valid_netdev_names = {};
2603 for (my $i = 0; $i < $MAX_NETS; $i++) {
2604 $valid_netdev_names->{"net
$i"} = 1;
2607 sub get_mark_values {
2608 my ($value, $mask) = @_;
2609 $value = hex($value) if $value =~ /^0x/;
2610 $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2611 $mask = 0xffffffff if !defined($mask);
2612 return ($value, $mask);
2616 my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env) = @_;
2618 my $orig_line = $line;
2622 # we can add single line comments to the end of the rule
2623 if ($line =~ s/#\s*(.*?)\s*$//) {
2624 $rule->{comment} = decode('utf8', $1);
2627 # we can disable a rule when prefixed with '|'
2629 $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2631 $line =~ s/^(\S+)\s+(\S+)\s*// ||
2632 die "unable to parse rule
: $line\n";
2634 $rule->{type} = lc($1);
2635 $rule->{action} = $2;
2637 if ($rule->{type} eq 'in' || $rule->{type} eq 'out') {
2638 if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2639 $rule->{macro} = $1;
2640 $rule->{action} = $2;
2644 while (length($line)) {
2645 if ($line =~ s/^-i (\S+)\s*//) {
2646 $rule->{iface} = $1;
2650 last if $rule->{type} eq 'group';
2652 if ($line =~ s/^-p (\S+)\s*//) {
2653 $rule->{proto} = $1;
2657 if ($line =~ s/^-dport (\S+)\s*//) {
2658 $rule->{dport} = $1;
2662 if ($line =~ s/^-sport (\S+)\s*//) {
2663 $rule->{sport} = $1;
2666 if ($line =~ s/^-source (\S+)\s*//) {
2667 $rule->{source} = $1;
2670 if ($line =~ s/^-dest (\S+)\s*//) {
2674 if ($line =~ s/^-log (emerg|alert|crit|err|warning|notice|info|debug|nolog)\s*//) {
2682 die "unable to parse rule parameters
: $line\n" if length($line);
2684 $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2685 if ($rule->{errors}) {
2686 # The verbose flag really means we're running from the CLI and want
2687 # output on the console - in the other case we really want such errors
2688 # to go into the syslog instead.
2689 my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2690 $log->("$prefix - errors
in rule parameters
: $orig_line\n");
2691 foreach my $p (keys %{$rule->{errors}}) {
2692 $log->(" $p: $rule->{errors
}->{$p}\n");
2699 sub verify_ethertype {
2701 my $types = get_etc_ethertypes();
2702 die "unknown ethernet protocol type
: $value\n"
2703 if !defined($types->{byname}->{$value}) &&
2704 !defined($types->{byid}->{$value});
2707 sub parse_vmfw_option {
2712 my $loglevels = "emerg
|alert
|crit
|err
|warning
|notice
|info
|debug
|nolog
";
2714 if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2717 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2719 $value = $2 ? lc($3) : '';
2720 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2723 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2726 } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
2729 verify_ethertype($_) foreach split(/\s*,\s*/, $value);
2731 die "can
't parse option '$line'\n"
2734 return ($opt, $value);
2737 sub parse_hostfw_option {
2742 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2744 if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid):\s*(0|1)\s*$/i) {
2747 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2749 $value = $2 ? lc($3) : '';
2750 } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2754 die "can't parse option
'$line'\n"
2757 return ($opt, $value);
2760 sub parse_clusterfw_option {
2765 if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2768 if (($value > 1) && ((time() - $value) > 60)) {
2771 } elsif ($line =~ m/^(ebtables):\s*(0|1)\s*$/i) {
2774 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2777 } elsif ($line =~ m/^(log_ratelimit):\s*(\S+)\s*$/) {
2781 die "can
't parse option '$line'\n"
2784 return ($opt, $value);
2788 my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2790 my $alias = lc($cidr);
2791 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2792 $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2794 die "no such alias '$cidr'\n" if !$e;;
2796 return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2799 sub parse_ip_or_cidr {
2804 if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2807 } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2811 die "value does not look like a valid IP address or CIDR network\n";
2814 return wantarray ? ($cidr, $ipversion) : $cidr;
2820 # we can add single line comments to the end of the line
2821 my $comment = decode('utf8
', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2823 if ($line =~ m/^(\S+)\s(\S+)$/) {
2824 my ($name, $cidr) = ($1, $2);
2827 ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2832 ipversion => $ipversion,
2834 $data->{comment} = $comment if $comment;
2841 sub generic_fw_config_parser {
2842 my ($filename, $cluster_conf, $empty_conf, $rule_env) = @_;
2847 my $res = $empty_conf;
2850 if ($filename =~ m!^/etc/pve/(.*)$!) {
2851 $raw = PVE::Cluster::get_config($1);
2853 $raw = eval { PVE::Tools::file_get_contents($filename) }; # ignore errors
2858 while ($raw =~ /^\h*(.*?)\h*$/gm) {
2861 next if $line =~ m/^#/;
2862 next if $line =~ m/^\s*$/;
2865 my $prefix = "$filename (line $linenr)";
2867 if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2868 $section = 'options
';
2872 if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2873 $section = 'aliases
';
2877 if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2878 $section = 'groups
';
2882 die "security group name too long\n" if length($group) > $max_group_name_length;
2883 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2886 ($section, $group, $comment) = undef;
2887 warn "$prefix: $err";
2891 $res->{$section}->{$group} = [];
2892 $res->{group_comments}->{$group} = decode('utf8
', $comment)
2897 if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2902 if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2907 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2908 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2911 ($section, $group, $comment) = undef;
2912 warn "$prefix: $err";
2916 $res->{$section}->{$group} = [];
2917 $res->{ipset_comments}->{$group} = decode('utf8
', $comment)
2923 warn "$prefix: skip line - no section\n";
2927 if ($section eq 'options
') {
2930 if ($rule_env eq 'cluster
') {
2931 ($opt, $value) = parse_clusterfw_option($line);
2932 } elsif ($rule_env eq 'host
') {
2933 ($opt, $value) = parse_hostfw_option($line);
2935 ($opt, $value) = parse_vmfw_option($line);
2937 $res->{options}->{$opt} = $value;
2939 warn "$prefix: $@" if $@;
2940 } elsif ($section eq 'aliases
') {
2942 my $data = parse_alias($line);
2943 $res->{aliases}->{lc($data->{name})} = $data;
2945 warn "$prefix: $@" if $@;
2946 } elsif ($section eq 'rules
') {
2948 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env); };
2950 warn "$prefix: $err";
2953 push @{$res->{$section}}, $rule;
2954 } elsif ($section eq 'groups
') {
2956 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group
'); };
2958 warn "$prefix: $err";
2961 push @{$res->{$section}->{$group}}, $rule;
2962 } elsif ($section eq 'ipset
') {
2963 # we can add single line comments to the end of the rule
2964 my $comment = decode('utf8
', $1) if $line =~ s/#\s*(.*?)\s*$//;
2966 $line =~ m/^(\!)?\s*(\S+)\s*$/;
2971 if ($nomatch && !$feature_ipset_nomatch) {
2972 $errors->{nomatch} = "nomatch not supported by kernel";
2976 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2977 resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2979 $cidr = parse_ip_or_cidr($cidr);
2984 $errors->{cidr} = $err;
2987 if ($cidr =~ m!/0+$!) {
2988 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
2991 my $entry = { cidr => $cidr };
2992 $entry->{nomatch} = 1 if $nomatch;
2993 $entry->{comment} = $comment if $comment;
2994 $entry->{errors} = $errors if $errors;
2996 if ($verbose && $errors) {
2997 warn "$prefix - errors in ipset '$group': $line\n";
2998 foreach my $p (keys %{$errors}) {
2999 warn " $p: $errors->{$p}\n";
3003 push @{$res->{$section}->{$group}}, $entry;
3005 warn "$prefix: skip line - unknown section\n";
3014 my ($code, @param) = @_;
3018 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
3025 sub read_local_vm_config {
3030 my $vmdata = { qemu => $qemu, lxc => $lxc };
3032 my $vmlist = PVE::Cluster::get_vmlist();
3033 return $vmdata if !$vmlist || !$vmlist->{ids};
3034 my $ids = $vmlist->{ids};
3036 foreach my $vmid (keys %$ids) {
3037 next if !$vmid; # skip VE0
3038 my $d = $ids->{$vmid};
3039 next if !$d->{node} || $d->{node} ne $nodename;
3040 next if !$d->{type};
3041 if ($d->{type} eq 'qemu
') {
3042 if ($have_qemu_server) {
3043 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
3044 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3045 $qemu->{$vmid} = $conf;
3048 } elsif ($d->{type} eq 'lxc
') {
3050 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
3051 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3052 $lxc->{$vmid} = $conf;
3061 sub load_vmfw_conf {
3062 my ($cluster_conf, $rule_env, $vmid, $dir) = @_;
3064 $dir = $pvefw_conf_dir if !defined($dir);
3065 my $filename = "$dir/$vmid.fw";
3072 ipset_comments => {},
3075 my $vmfw_conf = generic_fw_config_parser($filename, $cluster_conf, $empty_conf, $rule_env);
3076 $vmfw_conf->{vmid} = $vmid;
3081 my $format_rules = sub {
3082 my ($rules, $allow_iface) = @_;
3086 foreach my $rule (@$rules) {
3087 if ($rule->{type} eq 'in' || $rule->{type} eq 'out
' || $rule->{type} eq 'group
') {
3088 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
3089 $raw .= uc($rule->{type});
3090 if ($rule->{macro}) {
3091 $raw .= " $rule->{macro}($rule->{action})";
3093 $raw .= " " . $rule->{action};
3095 if ($allow_iface && $rule->{iface}) {
3096 $raw .= " -i $rule->{iface}";
3099 if ($rule->{type} ne 'group
') {
3100 $raw .= " -source $rule->{source}" if $rule->{source};
3101 $raw .= " -dest $rule->{dest}" if $rule->{dest};
3102 $raw .= " -p $rule->{proto}" if $rule->{proto};
3103 $raw .= " -dport $rule->{dport}" if $rule->{dport};
3104 $raw .= " -sport $rule->{sport}" if $rule->{sport};
3105 $raw .= " -log $rule->{log}" if $rule->{log};
3108 $raw .= " # " . encode('utf8
', $rule->{comment})
3109 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
3112 die "unknown rule type '$rule->{type
}'";
3119 my $format_options = sub {
3124 $raw .= "[OPTIONS]\n\n";
3125 foreach my $opt (keys %$options) {
3126 $raw .= "$opt: $options->{$opt}\n";
3133 my $format_aliases = sub {
3138 $raw .= "[ALIASES]\n\n";
3139 foreach my $k (keys %$aliases) {
3140 my $e = $aliases->{$k};
3141 $raw .= "$e->{name} $e->{cidr}";
3142 $raw .= " # " . encode('utf8
', $e->{comment})
3143 if $e->{comment} && $e->{comment} !~ m/^\s*$/;
3151 my $format_ipsets = sub {
3156 foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
3157 if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
3158 my $utf8comment = encode('utf8
', $comment);
3159 $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3161 $raw .= "[IPSET $ipset]\n\n";
3163 my $options = $fw_conf->{ipset}->{$ipset};
3166 foreach my $entry (@$options) {
3167 $nethash->{$entry->{cidr}} = $entry;
3170 foreach my $cidr (sort keys %$nethash) {
3171 my $entry = $nethash->{$cidr};
3172 my $line = $entry->{nomatch} ? '!' : '';
3173 $line .= $entry->{cidr};
3174 $line .= " # " . encode('utf8
', $entry->{comment})
3175 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3185 sub save_vmfw_conf {
3186 my ($vmid, $vmfw_conf) = @_;
3190 my $options = $vmfw_conf->{options};
3191 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3193 my $aliases = $vmfw_conf->{aliases};
3194 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3196 $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
3198 my $rules = $vmfw_conf->{rules} || [];
3199 if ($rules && scalar(@$rules)) {
3200 $raw .= "[RULES]\n\n";
3201 $raw .= &$format_rules($rules, 1);
3205 my $filename = "$pvefw_conf_dir/$vmid.fw";
3207 mkdir $pvefw_conf_dir;
3208 PVE::Tools::file_set_contents($filename, $raw);
3214 sub remove_vmfw_conf {
3217 my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3219 unlink $vmfw_conffile;
3222 sub clone_vmfw_conf {
3223 my ($vmid, $newid) = @_;
3225 my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3226 my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3228 if (-f $clonevm_conffile) {
3229 unlink $clonevm_conffile;
3231 if (-f $sourcevm_conffile) {
3232 my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3233 PVE::Tools::file_set_contents($clonevm_conffile, $data);
3237 sub read_vm_firewall_configs {
3238 my ($cluster_conf, $vmdata, $dir) = @_;
3240 my $vmfw_configs = {};
3242 foreach my $vmid (keys %{$vmdata->{qemu}}) {
3243 my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm
', $vmid, $dir);
3244 next if !$vmfw_conf->{options}; # skip if file does not exists
3245 $vmfw_configs->{$vmid} = $vmfw_conf;
3247 foreach my $vmid (keys %{$vmdata->{lxc}}) {
3248 my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct
', $vmid, $dir);
3249 next if !$vmfw_conf->{options}; # skip if file does not exists
3250 $vmfw_configs->{$vmid} = $vmfw_conf;
3253 return $vmfw_configs;
3256 sub get_option_log_level {
3257 my ($options, $k) = @_;
3259 my $v = $options->{$k};
3260 $v = $default_log_level if !defined($v);
3262 return undef if $v eq '' || $v eq 'nolog
';
3264 return $v if defined($log_level_hash->{$v});
3266 warn "unknown log level ($k = '$v')\n";
3271 sub generate_std_chains {
3272 my ($ruleset, $options, $ipversion) = @_;
3274 my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3276 my $loglevel = get_option_log_level($options, 'smurf_log_level
');
3277 my $chain = 'PVEFW-smurflog
';
3278 if ( $std_chains->{$chain} ) {
3279 foreach my $r (@{$std_chains->{$chain}}) {
3280 $r->{log} = $loglevel;
3284 # same as shorewall logflags action.
3285 $loglevel = get_option_log_level($options, 'tcp_flags_log_level
');
3286 $chain = 'PVEFW-logflags
';
3287 if ( $std_chains->{$chain} ) {
3288 foreach my $r (@{$std_chains->{$chain}}) {
3289 $r->{log} = $loglevel;
3293 foreach my $chain (keys %$std_chains) {
3294 ruleset_create_chain($ruleset, $chain);
3295 foreach my $rule (@{$std_chains->{$chain}}) {
3297 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, 0);
3299 die "rule $rule as string - should not happen";
3305 sub generate_ipset_chains {
3306 my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3308 foreach my $ipset (keys %{$ipsets}) {
3310 my $options = $ipsets->{$ipset};
3312 if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3313 if (my $ips = $device_ips->{$1}) {
3314 $options = [@$options, @$ips];
3320 foreach my $entry (@$options) {
3321 next if $entry->{errors}; # skip entries with errors
3324 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3325 ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3327 ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3329 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3331 # ip_compress_address takes an address only, no CIDR
3332 my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3333 $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3334 $cidr .= $prefix_len if defined($prefix_len);
3340 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3345 foreach my $ipversion (4, 6) {
3346 my $data = $nethash->{$ipversion};
3348 my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3350 my $hashsize = scalar(@$options);
3351 if ($hashsize <= 64) {
3354 $hashsize = round_powerof2($hashsize);
3357 my $family = $ipversion == "6" ? "inet6" : "inet";
3359 $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3361 foreach my $cidr (sort keys %$data) {
3362 my $entry = $data->{$cidr};
3364 my $cmd = "add $name $cidr";
3365 if ($entry->{nomatch}) {
3366 if ($feature_ipset_nomatch) {
3367 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3369 warn "ignore !$cidr - nomatch not supported by kernel\n";
3372 push @{$ipset_ruleset->{$name}}, $cmd;
3379 sub round_powerof2 {
3383 $int |= $int >> $_ foreach (1,2,4,8,16);
3387 my $set_global_log_ratelimit = sub {
3388 my $cluster_opts = shift;
3390 $global_log_ratelimit = '--limit
1/sec
';
3391 if (defined(my $log_rlimit = $cluster_opts->{log_ratelimit})) {
3392 my $ll_format = $cluster_option_properties->{log_ratelimit}->{format};
3393 my $limit = PVE::JSONSchema::parse_property_string($ll_format, $log_rlimit);
3395 if ($limit->{enable}) {
3396 if (my $rate = $limit->{rate}) {
3397 $global_log_ratelimit = "--limit $rate";
3399 if (my $burst = $limit->{burst}) {
3400 $global_log_ratelimit .= " --limit-burst $burst";
3403 $global_log_ratelimit = undef;
3408 sub load_clusterfw_conf {
3409 my ($filename) = @_;
3411 $filename = $clusterfw_conf_filename if !defined($filename);
3417 group_comments => {},
3419 ipset_comments => {},
3422 my $cluster_conf = generic_fw_config_parser($filename, $empty_conf, $empty_conf, 'cluster
');
3423 $set_global_log_ratelimit->($cluster_conf->{options});
3425 return $cluster_conf;
3428 sub save_clusterfw_conf {
3429 my ($cluster_conf) = @_;
3433 my $options = $cluster_conf->{options};
3434 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3436 my $aliases = $cluster_conf->{aliases};
3437 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3439 $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3441 my $rules = $cluster_conf->{rules};
3442 if ($rules && scalar(@$rules)) {
3443 $raw .= "[RULES]\n\n";
3444 $raw .= &$format_rules($rules, 1);
3448 if ($cluster_conf->{groups}) {
3449 foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3450 my $rules = $cluster_conf->{groups}->{$group};
3451 if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3452 my $utf8comment = encode('utf8
', $comment);
3453 $raw .= "[group $group] # $utf8comment\n\n";
3455 $raw .= "[group $group]\n\n";
3458 $raw .= &$format_rules($rules, 0);
3464 mkdir $pvefw_conf_dir;
3465 PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3467 unlink $clusterfw_conf_filename;
3471 sub load_hostfw_conf {
3472 my ($cluster_conf, $filename) = @_;
3474 $filename = $hostfw_conf_filename if !defined($filename);
3476 my $empty_conf = { rules => [], options => {}};
3477 return generic_fw_config_parser($filename, $cluster_conf, $empty_conf, 'host
');
3480 sub save_hostfw_conf {
3481 my ($hostfw_conf) = @_;
3485 my $options = $hostfw_conf->{options};
3486 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3488 my $rules = $hostfw_conf->{rules};
3489 if ($rules && scalar(@$rules)) {
3490 $raw .= "[RULES]\n\n";
3491 $raw .= &$format_rules($rules, 1);
3496 PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3498 unlink $hostfw_conf_filename;
3503 my ($cluster_conf, $hostfw_conf, $vmdata, $corosync_conf) = @_;
3507 # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3508 $pve_std_chains = dclone($pve_std_chains_conf);
3510 if ($vmdata) { # test mode
3511 my $testdir = $vmdata->{testdir} || die "no test directory specified";
3512 my $filename = "$testdir/cluster.fw";
3513 $cluster_conf = load_clusterfw_conf($filename);
3515 $filename = "$testdir/host.fw";
3516 $hostfw_conf = load_hostfw_conf($cluster_conf, $filename);
3518 $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir);
3519 } else { # normal operation
3520 $cluster_conf = load_clusterfw_conf(undef) if !$cluster_conf;
3522 $hostfw_conf = load_hostfw_conf($cluster_conf, undef) if !$hostfw_conf;
3524 # cfs_update is handled by daemon or API
3525 $corosync_conf = PVE::Cluster::cfs_read_file("corosync.conf")
3526 if !defined($corosync_conf) && PVE::Corosync::check_conf_exists(1);
3528 $vmdata = read_local_vm_config();
3529 $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef);
3532 return ({},{},{},{}) if !$cluster_conf->{options}->{enable};
3535 if ($cluster_conf->{aliases}->{local_network}) {
3536 $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3539 ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3541 $cluster_conf->{aliases}->{local_network} = {
3542 name => 'local_network
', cidr => $localnet, ipversion => $localnet_ver };
3545 push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3547 my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3548 my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
3549 my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata);
3550 my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3552 return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
3555 sub compile_iptables_filter {
3556 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
3560 ruleset_create_chain($ruleset, "PVEFW-INPUT");
3561 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3563 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3565 my $hostfw_options = $hostfw_conf->{options} || {};
3567 # fixme: what log level should we use here?
3568 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3570 my $conn_allow_invalid = $hostfw_options->{nf_conntrack_allow_invalid} // 0;
3571 ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", $conn_allow_invalid, "ACCEPT");
3573 ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3574 ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3576 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3578 ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3579 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3581 generate_std_chains($ruleset, $hostfw_options, $ipversion);
3583 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3585 if ($hostfw_enable) {
3586 eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf); };
3587 warn $@ if $@; # just to be sure - should not happen
3590 # generate firewall rules for QEMU VMs
3591 foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3593 my $conf = $vmdata->{qemu}->{$vmid};
3594 my $vmfw_conf = $vmfw_configs->{$vmid};
3595 return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3597 foreach my $netid (sort keys %$conf) {
3598 next if $netid !~ m/^net(\d+)$/;
3599 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3600 next if !$net->{firewall};
3602 my $iface = "tap${vmid}i$1";
3603 my $macaddr = $net->{macaddr};
3604 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3605 $vmfw_conf, $vmid, 'IN
', $ipversion);
3606 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3607 $vmfw_conf, $vmid, 'OUT
', $ipversion);
3610 warn $@ if $@; # just to be sure - should not happen
3613 # generate firewall rules for LXC containers
3614 foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3616 my $conf = $vmdata->{lxc}->{$vmid};
3617 my $vmfw_conf = $vmfw_configs->{$vmid};
3618 return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3620 foreach my $netid (sort keys %$conf) {
3621 next if $netid !~ m/^net(\d+)$/;
3622 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3623 next if !$net->{firewall};
3625 my $iface = "veth${vmid}i$1";
3626 my $macaddr = $net->{hwaddr};
3627 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3628 $vmfw_conf, $vmid, 'IN
', $ipversion);
3629 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3630 $vmfw_conf, $vmid, 'OUT
', $ipversion);
3633 warn $@ if $@; # just to be sure - should not happen
3636 if (ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3637 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3643 sub mac_to_linklocal {
3645 my @parts = split(/:/, $macaddr);
3646 # The standard link local address uses the fe80::/64 prefix with the
3647 # modified EUI-64 identifier derived from the MAC address by flipping the
3648 # universal/local bit and inserting FF:FE in the middle.
3650 $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3651 my @meui64 = (@parts[0,1,2], 'ff
', 'fe
', @parts[3,4,5]);
3652 return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3655 sub compile_ipsets {
3656 my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3659 if ($cluster_conf->{aliases}->{local_network}) {
3660 $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3663 ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3665 $cluster_conf->{aliases}->{local_network} = {
3666 name => 'local_network
', cidr => $localnet, ipversion => $localnet_ver };
3669 push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3672 my $ipset_ruleset = {};
3674 # generate ipsets for QEMU VMs
3675 foreach my $vmid (keys %{$vmdata->{qemu}}) {
3677 my $conf = $vmdata->{qemu}->{$vmid};
3678 my $vmfw_conf = $vmfw_configs->{$vmid};
3679 return if !$vmfw_conf;
3681 # When the 'ipfilter
' option is enabled every device for which there
3682 # is no 'ipfilter-netX
' ipset defiend gets an implicit empty default
3684 # The reason is that ipfilter ipsets are always filled with standard
3685 # IPv6 link-local filters.
3686 my $ipsets = $vmfw_conf->{ipset};
3687 my $implicit_sets = {};
3689 my $device_ips = {};
3690 foreach my $netid (keys %$conf) {
3691 next if $netid !~ m/^net(\d+)$/;
3692 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3693 next if !$net->{firewall};
3695 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3696 $implicit_sets->{"ipfilter-$netid"} = [];
3699 my $macaddr = $net->{macaddr};
3700 my $linklocal = mac_to_linklocal($macaddr);
3701 $device_ips->{$netid} = [
3702 { cidr => $linklocal },
3703 { cidr => 'fe80
::/10', nomatch => 1 }
3707 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3708 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3710 warn $@ if $@; # just to be sure - should not happen
3713 # generate firewall rules for LXC containers
3714 foreach my $vmid (keys %{$vmdata->{lxc}}) {
3716 my $conf = $vmdata->{lxc}->{$vmid};
3717 my $vmfw_conf = $vmfw_configs->{$vmid};
3718 return if !$vmfw_conf;
3720 # When the 'ipfilter
' option is enabled every device for which there
3721 # is no 'ipfilter-netX
' ipset defiend gets an implicit empty default
3723 # The reason is that ipfilter ipsets are always filled with standard
3724 # IPv6 link-local filters, as well as the IP addresses configured
3725 # for the container.
3726 my $ipsets = $vmfw_conf->{ipset};
3727 my $implicit_sets = {};
3729 my $device_ips = {};
3730 foreach my $netid (keys %$conf) {
3731 next if $netid !~ m/^net(\d+)$/;
3732 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3733 next if !$net->{firewall};
3735 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3736 $implicit_sets->{"ipfilter-$netid"} = [];
3739 my $macaddr = $net->{hwaddr};
3740 my $linklocal = mac_to_linklocal($macaddr);
3741 my $set = $device_ips->{$netid} = [
3742 { cidr => $linklocal },
3743 { cidr => 'fe80
::/10', nomatch => 1 }
3745 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3746 push @$set, { cidr => $1 };
3748 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3749 push @$set, { cidr => $1 };
3753 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3754 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3756 warn $@ if $@; # just to be sure - should not happen
3759 generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3761 return $ipset_ruleset;
3764 sub compile_ebtables_filter {
3765 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata) = @_;
3767 if (!($cluster_conf->{options}->{ebtables} // 1)) {
3773 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3775 ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3776 #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED
', to speedup rules
3777 ruleset_addrule($ruleset, 'PVEFW-FORWARD
', '-p IPv4
', '-j ACCEPT
');
3778 ruleset_addrule($ruleset, 'PVEFW-FORWARD
', '-p IPv6
', '-j ACCEPT
');
3779 ruleset_addrule($ruleset, 'PVEFW-FORWARD
', '-o fwln
+', '-j PVEFW-FWBR-OUT
');
3781 # generate firewall rules for QEMU VMs
3782 foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3784 my $conf = $vmdata->{qemu}->{$vmid};
3785 my $vmfw_conf = $vmfw_configs->{$vmid};
3786 return if !$vmfw_conf;
3787 my $ipsets = $vmfw_conf->{ipset};
3789 foreach my $netid (sort keys %$conf) {
3790 next if $netid !~ m/^net(\d+)$/;
3791 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3792 next if !$net->{firewall};
3793 my $iface = "tap${vmid}i$1";
3794 my $macaddr = $net->{macaddr};
3796 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3797 foreach my $ipaddr (@$ipset) {
3798 my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3799 next if !$ip || ($version && $version != 4);
3800 push(@$arpfilter, $ip);
3803 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3806 warn $@ if $@; # just to be sure - should not happen
3809 # generate firewall rules for LXC containers
3810 foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3812 my $conf = $vmdata->{lxc}->{$vmid};
3814 my $vmfw_conf = $vmfw_configs->{$vmid};
3815 return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3816 my $ipsets = $vmfw_conf->{ipset};
3818 foreach my $netid (sort keys %$conf) {
3819 next if $netid !~ m/^net(\d+)$/;
3820 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3821 next if !$net->{firewall};
3822 my $iface = "veth${vmid}i$1";
3823 my $macaddr = $net->{hwaddr};
3825 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3826 foreach my $ipaddr (@$ipset) {
3827 my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3828 next if !$ip || ($version && $version != 4);
3829 push(@$arpfilter, $ip);
3832 if (defined(my $ip = $net->{ip}) && $vmfw_conf->{options}->{ipfilter}) {
3833 # ebtables changes this to a .0/MASK network but we just
3834 # want the address here, no network - see #2193
3836 push @$arpfilter, $ip;
3838 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3841 warn $@ if $@; # just to be sure - should not happen
3847 sub generate_tap_layer2filter {
3848 my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter) = @_;
3849 my $options = $vmfw_conf->{options};
3851 my $tapchain = $iface."-OUT";
3853 # ebtables remove zeros from mac pairs
3854 $macaddr =~ s/0([0-9a-f])/$1/ig;
3855 $macaddr = lc($macaddr);
3857 ruleset_create_chain($ruleset, $tapchain);
3859 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
3860 ruleset_addrule($ruleset, $tapchain, "-s ! $macaddr", '-j DROP
');
3864 my $arpchain = $tapchain."-ARP";
3865 ruleset_addrule($ruleset, $tapchain, "-p ARP", "-j $arpchain");
3866 ruleset_create_chain($ruleset, $arpchain);
3868 foreach my $ip (@{$arpfilter}) {
3869 ruleset_addrule($ruleset, $arpchain, "-p ARP --arp-ip-src $ip", '-j RETURN
');
3871 ruleset_addrule($ruleset, $arpchain, '', '-j DROP
');
3874 if (defined($options->{layer2_protocols})){
3875 my $protochain = $tapchain."-PROTO";
3876 ruleset_addrule($ruleset, $tapchain, '', "-j $protochain");
3877 ruleset_create_chain($ruleset, $protochain);
3879 foreach my $proto (split(/,/, $options->{layer2_protocols})) {
3880 ruleset_addrule($ruleset, $protochain, "-p $proto", '-j RETURN
');
3882 ruleset_addrule($ruleset, $protochain, '', '-j DROP
');
3885 ruleset_addrule($ruleset, $tapchain, '', '-j ACCEPT
');
3887 ruleset_addrule($ruleset, 'PVEFW-FWBR-OUT
', "-i $iface", "-j $tapchain");
3890 # the parameter $change_only_regex changes two things if defined:
3891 # * all chains not matching it will be left intact
3892 # * both the $active_chains hash and the returned status_hash have different
3893 # structure (they contain a key named 'rules
').
3894 sub get_ruleset_status {
3895 my ($ruleset, $active_chains, $digest_fn, $change_only_regex) = @_;
3897 my $statushash = {};
3899 foreach my $chain (sort keys %$ruleset) {
3900 my $rules = $ruleset->{$chain};
3901 my $sig = &$digest_fn($rules);
3904 $statushash->{$chain}->{sig} = $sig;
3905 if (defined($change_only_regex)) {
3906 $oldsig = $active_chains->{$chain}->{sig};
3907 $statushash->{$chain}->{rules} = $rules;
3909 $oldsig = $active_chains->{$chain};
3911 if (!defined($oldsig)) {
3912 $statushash->{$chain}->{action} = 'create
';
3914 if ($oldsig eq $sig) {
3915 $statushash->{$chain}->{action} = 'exists';
3917 $statushash->{$chain}->{action} = 'update
';
3921 print "$statushash->{$chain}->{action} $chain ($sig)\n";
3922 foreach my $cmd (@{$rules}) {
3928 foreach my $chain (sort keys %$active_chains) {
3929 next if defined($ruleset->{$chain});
3930 my $action = 'delete';
3931 my $sig = $active_chains->{$chain};
3932 if (defined($change_only_regex)) {
3933 $action = 'ignore
' if ($chain !~ m/$change_only_regex/);
3934 $statushash->{$chain}->{rules} = $active_chains->{$chain}->{rules};
3937 $statushash->{$chain}->{action} = $action;
3938 $statushash->{$chain}->{sig} = $sig;
3939 print "$action $chain ($sig)\n" if $verbose;
3945 sub print_sig_rule {
3946 my ($chain, $sig) = @_;
3948 # We just use this to store a SHA1 checksum used to detect changes
3949 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3952 sub get_ruleset_cmdlist {
3953 my ($ruleset, $iptablescmd) = @_;
3955 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3957 my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3958 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
3960 # create missing chains first
3961 foreach my $chain (sort keys %$ruleset) {
3962 my $stat = $statushash->{$chain};
3963 die "internal error" if !$stat;
3964 next if $stat->{action} ne 'create
';
3966 $cmdlist .= ":$chain - [0:0]\n";
3969 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3970 my $chain = "PVEFW-$h";
3971 if ($ruleset->{$chain} && !$hooks->{$h}) {
3972 $cmdlist .= "-A $h -j $chain\n";
3976 foreach my $chain (sort keys %$ruleset) {
3977 my $stat = $statushash->{$chain};
3978 die "internal error" if !$stat;
3980 if ($stat->{action
} eq 'update' || $stat->{action
} eq 'create') {
3981 $cmdlist .= "-F $chain\n";
3982 foreach my $cmd (@{$ruleset->{$chain}}) {
3983 $cmdlist .= "$cmd\n";
3985 $cmdlist .= print_sig_rule
($chain, $stat->{sig
});
3986 } elsif ($stat->{action
} eq 'delete') {
3987 die "internal error"; # this should not happen
3988 } elsif ($stat->{action
} eq 'exists') {
3991 die "internal error - unknown status '$stat->{action}'";
3995 foreach my $chain (keys %$statushash) {
3996 next if $statushash->{$chain}->{action
} ne 'delete';
3997 $cmdlist .= "-F $chain\n";
3999 foreach my $chain (keys %$statushash) {
4000 next if $statushash->{$chain}->{action
} ne 'delete';
4001 next if $chain eq 'PVEFW-INPUT';
4002 next if $chain eq 'PVEFW-OUTPUT';
4003 next if $chain eq 'PVEFW-FORWARD';
4004 $cmdlist .= "-X $chain\n";
4007 my $changes = $cmdlist ne "*filter\n" ?
1 : 0;
4009 $cmdlist .= "COMMIT\n";
4011 return wantarray ?
($cmdlist, $changes) : $cmdlist;
4014 my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tap|veth)\d+i\d+-(?:IN|OUT)/;
4016 sub get_ebtables_cmdlist
{
4020 my $cmdlist = "*filter\n";
4022 my $active_chains = ebtables_get_chains
();
4023 my $statushash = get_ruleset_status
($ruleset, $active_chains,
4024 \
&iptables_chain_digest
,
4025 $pve_ebtables_chainname_regex);
4027 # create chains first and make sure PVE rules are evaluated if active
4028 my $append_pve_to_forward = '-A FORWARD -j PVEFW-FORWARD';
4029 my $pve_include = 0;
4030 foreach my $chain (sort keys %$statushash) {
4031 next if ($statushash->{$chain}->{action
} eq 'delete');
4032 $cmdlist .= ":$chain ACCEPT\n";
4033 $pve_include = 1 if ($chain eq 'PVEFW-FORWARD');
4036 foreach my $chain (sort keys %$statushash) {
4037 my $stat = $statushash->{$chain};
4038 $changes = 1 if ($stat->{action
} !~ 'ignore|exists');
4039 next if ($stat->{action
} eq 'delete');
4041 foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
4042 if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
4043 next if ! $pve_include;
4046 $cmdlist .= "$cmd\n";
4049 $cmdlist .= "$append_pve_to_forward\n" if $pve_include;
4051 return wantarray ?
($cmdlist, $changes) : $cmdlist;
4054 sub get_ipset_cmdlist
{
4059 my $delete_cmdlist = "";
4061 my $active_chains = ipset_get_chains
();
4062 my $statushash = get_ruleset_status
($ruleset, $active_chains, \
&ipset_chain_digest
);
4064 # remove stale _swap chains
4065 foreach my $chain (keys %$active_chains) {
4066 if ($chain =~ m/^PVEFW-\S+_swap$/) {
4067 $cmdlist .= "destroy $chain\n";
4071 foreach my $chain (keys %$ruleset) {
4072 my $stat = $statushash->{$chain};
4073 die "internal error" if !$stat;
4075 if ($stat->{action
} eq 'create') {
4076 foreach my $cmd (@{$ruleset->{$chain}}) {
4077 $cmdlist .= "$cmd\n";
4082 foreach my $chain (keys %$ruleset) {
4083 my $stat = $statushash->{$chain};
4084 die "internal error" if !$stat;
4086 if ($stat->{action
} eq 'update') {
4087 my $chain_swap = $chain."_swap";
4089 foreach my $cmd (@{$ruleset->{$chain}}) {
4090 $cmd =~ s/$chain/$chain_swap/;
4091 $cmdlist .= "$cmd\n";
4093 $cmdlist .= "swap $chain_swap $chain\n";
4094 $cmdlist .= "flush $chain_swap\n";
4095 $cmdlist .= "destroy $chain_swap\n";
4099 # the remove unused chains
4100 foreach my $chain (keys %$statushash) {
4101 next if $statushash->{$chain}->{action
} ne 'delete';
4103 $delete_cmdlist .= "flush $chain\n";
4104 $delete_cmdlist .= "destroy $chain\n";
4107 my $changes = ($cmdlist || $delete_cmdlist) ?
1 : 0;
4109 return ($cmdlist, $delete_cmdlist, $changes);
4113 my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = @_;
4115 enable_bridge_firewall
();
4117 my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
4118 get_ipset_cmdlist
($ipset_ruleset);
4120 my ($cmdlist, $changes) = get_ruleset_cmdlist
($ruleset);
4121 my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist
($rulesetv6, "ip6tables");
4122 my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist
($ebtables_ruleset);
4125 if ($ipset_changes) {
4126 print "ipset changes:\n";
4127 print $ipset_create_cmdlist if $ipset_create_cmdlist;
4128 print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
4132 print "iptables changes:\n";
4137 print "ip6tables changes:\n";
4141 if ($ebtables_changes) {
4142 print "ebtables changes:\n";
4143 print $ebtables_cmdlist;
4147 my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
4148 PVE
::Tools
::file_set_contents
($tmpfile, $ipset_create_cmdlist || '');
4150 ipset_restore_cmdlist
($ipset_create_cmdlist);
4152 $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
4153 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlist || '');
4155 iptables_restore_cmdlist
($cmdlist);
4157 $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
4158 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlistv6 || '');
4160 ip6tables_restore_cmdlist
($cmdlistv6);
4162 $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
4163 PVE
::Tools
::file_set_contents
($tmpfile, $ipset_delete_cmdlist || '');
4165 ipset_restore_cmdlist
($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
4167 ebtables_restore_cmdlist
($ebtables_cmdlist);
4169 $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
4170 PVE
::Tools
::file_set_contents
($tmpfile, $ebtables_cmdlist || '');
4172 # test: re-read status and check if everything is up to date
4173 my $active_chains = iptables_get_chains
();
4174 my $statushash = get_ruleset_status
($ruleset, $active_chains, \
&iptables_chain_digest
);
4177 foreach my $chain (sort keys %$ruleset) {
4178 my $stat = $statushash->{$chain};
4179 if ($stat->{action
} ne 'exists') {
4180 warn "unable to update chain '$chain'\n";
4185 my $active_chainsv6 = iptables_get_chains
("ip6tables");
4186 my $statushashv6 = get_ruleset_status
($rulesetv6, $active_chainsv6, \
&iptables_chain_digest
);
4188 foreach my $chain (sort keys %$rulesetv6) {
4189 my $stat = $statushashv6->{$chain};
4190 if ($stat->{action
} ne 'exists') {
4191 warn "unable to update chain '$chain'\n";
4196 my $active_ebtables_chains = ebtables_get_chains
();
4197 my $ebtables_statushash = get_ruleset_status
($ebtables_ruleset,
4198 $active_ebtables_chains, \
&iptables_chain_digest
,
4199 $pve_ebtables_chainname_regex);
4201 foreach my $chain (sort keys %$ebtables_ruleset) {
4202 my $stat = $ebtables_statushash->{$chain};
4203 if ($stat->{action
} ne 'exists') {
4204 warn "ebtables : unable to update chain '$chain'\n";
4209 die "unable to apply firewall changes\n" if $errors;
4211 update_nf_conntrack_max
($hostfw_conf);
4213 update_nf_conntrack_tcp_timeout_established
($hostfw_conf);
4215 update_nf_conntrack_logging
($hostfw_conf);
4218 sub update_nf_conntrack_max
{
4219 my ($hostfw_conf) = @_;
4221 my $max = 65536; # reasonable default
4223 my $options = $hostfw_conf->{options
} || {};
4225 if (defined($options->{nf_conntrack_max
}) && ($options->{nf_conntrack_max
} > $max)) {
4226 $max = $options->{nf_conntrack_max
};
4227 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
4230 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
4231 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
4233 my $current = int(PVE
::Tools
::file_read_firstline
($filename_nf_conntrack_max) || $max);
4235 if ($current != $max) {
4236 my $hashsize = int($max/4);
4237 PVE
::ProcFSTools
::write_proc_entry
($filename_hashsize, $hashsize);
4238 PVE
::ProcFSTools
::write_proc_entry
($filename_nf_conntrack_max, $max);
4242 sub update_nf_conntrack_tcp_timeout_established
{
4243 my ($hostfw_conf) = @_;
4245 my $options = $hostfw_conf->{options
} || {};
4247 my $value = defined($options->{nf_conntrack_tcp_timeout_established
}) ?
$options->{nf_conntrack_tcp_timeout_established
} : 432000;
4249 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
4252 my $log_nf_conntrack_enabled = undef;
4253 sub update_nf_conntrack_logging
{
4254 my ($hostfw_conf) = @_;
4256 my $options = $hostfw_conf->{options
} || {};
4257 my $value = $options->{log_nf_conntrack
} || 0;
4258 if (!defined($log_nf_conntrack_enabled)
4259 || $value != $log_nf_conntrack_enabled)
4261 my $tmpfile = "$pve_fw_status_dir/log_nf_conntrack";
4262 PVE
::Tools
::file_set_contents
($tmpfile, $value);
4264 run_command
([qw(systemctl try-reload-or-restart pvefw-logger.service)]);
4265 $log_nf_conntrack_enabled = $value;
4269 sub remove_pvefw_chains
{
4271 PVE
::Firewall
::remove_pvefw_chains_iptables
("iptables");
4272 PVE
::Firewall
::remove_pvefw_chains_iptables
("ip6tables");
4273 PVE
::Firewall
::remove_pvefw_chains_ipset
();
4274 PVE
::Firewall
::remove_pvefw_chains_ebtables
();
4278 sub remove_pvefw_chains_iptables
{
4279 my ($iptablescmd) = @_;
4281 my ($chash, $hooks) = iptables_get_chains
($iptablescmd);
4282 my $cmdlist = "*filter\n";
4284 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
4286 $cmdlist .= "-D $h -j PVEFW-$h\n";
4290 foreach my $chain (keys %$chash) {
4291 $cmdlist .= "-F $chain\n";
4294 foreach my $chain (keys %$chash) {
4295 $cmdlist .= "-X $chain\n";
4297 $cmdlist .= "COMMIT\n";
4299 if($iptablescmd eq "ip6tables") {
4300 ip6tables_restore_cmdlist
($cmdlist);
4302 iptables_restore_cmdlist
($cmdlist);
4306 sub remove_pvefw_chains_ipset
{
4308 my $ipset_chains = ipset_get_chains
();
4312 foreach my $chain (keys %$ipset_chains) {
4313 $cmdlist .= "flush $chain\n";
4314 $cmdlist .= "destroy $chain\n";
4317 ipset_restore_cmdlist
($cmdlist) if $cmdlist;
4320 sub remove_pvefw_chains_ebtables
{
4321 # apply empty ruleset = remove all our chains
4322 ebtables_restore_cmdlist
(get_ebtables_cmdlist
({}));
4326 my $cluster_conf = load_clusterfw_conf
();
4327 my $cluster_options = $cluster_conf->{options
};
4328 my $enable = $cluster_options->{enable
};
4332 # load required modules here
4338 my $cluster_conf = load_clusterfw_conf
();
4339 my $cluster_options = $cluster_conf->{options
};
4341 if (!$cluster_options->{enable
}) {
4342 PVE
::Firewall
::remove_pvefw_chains
();
4346 my $hostfw_conf = load_hostfw_conf
($cluster_conf);
4348 my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile
($cluster_conf, $hostfw_conf);
4350 apply_ruleset
($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);