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.",
1262 nf_conntrack_max
=> {
1263 description
=> "Maximum number of tracked connections.",
1269 nf_conntrack_tcp_timeout_established
=> {
1270 description
=> "Conntrack established timeout.",
1276 nf_conntrack_tcp_timeout_syn_recv
=> {
1277 description
=> "Conntrack syn recv timeout.",
1285 description
=> "Enable NDP (Neighbor Discovery Protocol).",
1290 nf_conntrack_allow_invalid
=> {
1291 description
=> "Allow invalid packets on connection tracking.",
1296 protection_synflood
=> {
1297 description
=> "Enable synflood protection",
1302 protection_synflood_rate
=> {
1303 description
=> "Synflood protection rate syn/sec by ip src.",
1308 protection_synflood_burst
=> {
1309 description
=> "Synflood protection rate burst by ip src.",
1314 log_nf_conntrack
=> {
1315 description
=> "Enable logging of conntrack information.",
1322 our $vm_option_properties = {
1324 description
=> "Enable/disable firewall rules.",
1330 description
=> "Enable/disable MAC address filter.",
1336 description
=> "Enable DHCP.",
1342 description
=> "Enable NDP (Neighbor Discovery Protocol).",
1348 description
=> "Allow sending Router Advertisement.",
1353 description
=> "Enable default IP filters. " .
1354 "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1355 "for every interface. Such ipsets implicitly contain sane default " .
1356 "restrictions such as restricting IPv6 link local addresses to " .
1357 "the one derived from the interface's MAC address. For containers " .
1358 "the configured IP addresses will be implicitly added.",
1363 description
=> "Input policy.",
1366 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1369 description
=> "Output policy.",
1372 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1374 log_level_in
=> get_standard_option
('pve-fw-loglevel', {
1375 description
=> "Log level for incoming traffic." }),
1376 log_level_out
=> get_standard_option
('pve-fw-loglevel', {
1377 description
=> "Log level for outgoing traffic." }),
1382 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.";
1384 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.";
1386 my $rule_properties = {
1388 description
=> "Update rule at position <pos>.",
1393 digest
=> get_standard_option
('pve-config-digest'),
1395 description
=> "Rule type.",
1398 enum
=> ['in', 'out', 'group'],
1401 description
=> "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1404 pattern
=> $security_group_name_pattern,
1409 description
=> "Use predefined standard macro.",
1414 iface
=> get_standard_option
('pve-iface', {
1415 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.",
1419 description
=> "Restrict packet source address. $addr_list_descr",
1420 type
=> 'string', format
=> 'pve-fw-addr-spec',
1424 description
=> "Restrict packet destination address. $addr_list_descr",
1425 type
=> 'string', format
=> 'pve-fw-addr-spec',
1429 description
=> "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1430 type
=> 'string', format
=> 'pve-fw-protocol-spec',
1434 description
=> "Flag to enable/disable a rule.",
1439 log => get_standard_option
('pve-fw-loglevel', {
1440 description
=> "Log level for firewall rule.",
1443 description
=> "Restrict TCP/UDP source port. $port_descr",
1444 type
=> 'string', format
=> 'pve-fw-sport-spec',
1448 description
=> "Restrict TCP/UDP destination port. $port_descr",
1449 type
=> 'string', format
=> 'pve-fw-dport-spec',
1453 description
=> "Descriptive comment.",
1459 sub add_rule_properties
{
1460 my ($properties) = @_;
1462 foreach my $k (keys %$rule_properties) {
1463 my $h = $rule_properties->{$k};
1464 # copy data, so that we can modify later without side effects
1465 foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1471 sub delete_rule_properties
{
1472 my ($rule, $delete_str) = @_;
1474 foreach my $opt (PVE
::Tools
::split_list
($delete_str)) {
1475 raise_param_exc
({ 'delete' => "no such property ('$opt')"})
1476 if !defined($rule_properties->{$opt});
1477 raise_param_exc
({ 'delete' => "unable to delete required property '$opt'"})
1478 if $opt eq 'type' || $opt eq 'action';
1479 delete $rule->{$opt};
1485 my $apply_macro = sub {
1486 my ($macro_name, $param, $verify, $ipversion) = @_;
1488 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1489 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1491 if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1492 $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1495 # skip macros which are specific to another ipversion
1496 if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1497 return if $ipversion != $required;
1502 foreach my $templ (@$macro_rules) {
1504 my $param_used = {};
1505 foreach my $k (keys %$templ) {
1506 my $v = $templ->{$k};
1507 if ($v eq 'PARAM') {
1509 $param_used->{$k} = 1;
1510 } elsif ($v eq 'DEST') {
1511 $v = $param->{dest
};
1512 $param_used->{dest
} = 1;
1513 } elsif ($v eq 'SOURCE') {
1514 $v = $param->{source
};
1515 $param_used->{source
} = 1;
1519 my $msg = "missing parameter '$k' in macro '$macro_name'";
1520 raise_param_exc
({ macro => $msg }) if $verify;
1525 foreach my $k (keys %$param) {
1526 next if $k eq 'macro';
1527 next if !defined($param->{$k});
1528 next if $param_used->{$k};
1529 if (defined($rule->{$k})) {
1530 if ($rule->{$k} ne $param->{$k}) {
1531 my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1532 raise_param_exc
({ $k => $msg }) if $verify;
1536 $rule->{$k} = $param->{$k};
1539 push @$rules, $rule;
1545 my $rule_env_iface_lookup = {
1554 my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1556 my $allow_groups = $rule_env eq 'group' ?
0 : 1;
1558 my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1559 die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1561 my $errors = $rule->{errors
} || {};
1563 my $error_count = 0;
1565 my $add_error = sub {
1566 my ($param, $msg) = @_;
1568 raise_param_exc
({ $param => $msg }) if !$noerr;
1570 $errors->{$param} = $msg if !$errors->{$param};
1574 my $set_ip_version = sub {
1577 die "detected mixed ipv4/ipv6 adresses in rule\n"
1578 if $ipversion && ($vers != $ipversion);
1583 my $check_ipset_or_alias_property = sub {
1584 my ($name, $expected_ipversion) = @_;
1586 if (my $value = $rule->{$name}) {
1587 if ($value =~ m/^\+/) {
1588 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1589 &$add_error($name, "no such ipset '$1'")
1590 if !($cluster_conf->{ipset
}->{$1} || ($fw_conf && $fw_conf->{ipset
}->{$1}));
1593 &$add_error($name, "invalid ipset name '$value'");
1595 } elsif ($value =~ m/^${ip_alias_pattern}$/){
1596 my $alias = lc($value);
1597 &$add_error($name, "no such alias '$value'")
1598 if !($cluster_conf->{aliases
}->{$alias} || ($fw_conf && $fw_conf->{aliases
}->{$alias}));
1599 my $e = $fw_conf ?
$fw_conf->{aliases
}->{$alias} : undef;
1600 $e = $cluster_conf->{aliases
}->{$alias} if !$e && $cluster_conf;
1602 &$set_ip_version($e->{ipversion
});
1607 my $type = $rule->{type
};
1608 my $action = $rule->{action
};
1610 &$add_error('type', "missing property") if !$type;
1611 &$add_error('action', "missing property") if !$action;
1614 if ($type eq 'in' || $type eq 'out') {
1615 &$add_error('action', "unknown action '$action'")
1616 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1617 } elsif ($type eq 'group') {
1618 &$add_error('type', "security groups not allowed")
1620 &$add_error('action', "invalid characters in security group name")
1621 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1623 &$add_error('type', "unknown rule type '$type'");
1627 if ($rule->{iface
}) {
1628 &$add_error('type', "parameter -i not allowed for this rule type")
1630 eval { PVE
::JSONSchema
::pve_verify_iface
($rule->{iface
}); };
1631 &$add_error('iface', $@) if $@;
1632 if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1633 &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1634 if $rule->{iface
} !~ m/^net(\d+)$/;
1638 if ($rule->{macro}) {
1639 if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1640 $rule->{macro} = $preferred_name;
1642 &$add_error('macro', "unknown macro '$rule->{macro}'");
1646 if ($rule->{proto
}) {
1647 eval { pve_fw_verify_protocol_spec
($rule->{proto
}); };
1648 &$add_error('proto', $@) if $@;
1649 &$set_ip_version(4) if $rule->{proto
} eq 'icmp';
1650 &$set_ip_version(6) if $rule->{proto
} eq 'icmpv6';
1653 if ($rule->{dport
}) {
1654 eval { parse_port_name_number_or_range
($rule->{dport
}, 1); };
1655 &$add_error('dport', $@) if $@;
1656 my $proto = $rule->{proto
};
1657 &$add_error('proto', "missing property - 'dport' requires this property")
1659 &$add_error('dport', "protocol '$proto' does not support ports")
1660 if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1661 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1664 if ($rule->{sport
}) {
1665 eval { parse_port_name_number_or_range
($rule->{sport
}, 0); };
1666 &$add_error('sport', $@) if $@;
1667 my $proto = $rule->{proto
};
1668 &$add_error('proto', "missing property - 'sport' requires this property")
1670 &$add_error('sport', "protocol '$proto' does not support ports")
1671 if !$PROTOCOLS_WITH_PORTS->{$proto};
1674 if ($rule->{source
}) {
1676 my $source_ipversion = parse_address_list
($rule->{source
});
1677 &$set_ip_version($source_ipversion);
1679 &$add_error('source', $@) if $@;
1680 &$check_ipset_or_alias_property('source', $ipversion);
1683 if ($rule->{dest
}) {
1685 my $dest_ipversion = parse_address_list
($rule->{dest
});
1686 &$set_ip_version($dest_ipversion);
1688 &$add_error('dest', $@) if $@;
1689 &$check_ipset_or_alias_property('dest', $ipversion);
1692 $rule->{ipversion
} = $ipversion if $ipversion;
1694 if ($rule->{macro} && !$error_count) {
1695 eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1697 if (ref($err) eq "PVE::Exception" && $err->{errors
}) {
1698 my $eh = $err->{errors
};
1699 foreach my $p (keys %$eh) {
1700 &$add_error($p, $eh->{$p});
1703 &$add_error('macro', "$err");
1708 $rule->{errors
} = $errors if $error_count;
1713 sub copy_rule_data
{
1714 my ($rule, $param) = @_;
1716 foreach my $k (keys %$rule_properties) {
1717 if (defined(my $v = $param->{$k})) {
1718 if ($v eq '' || $v eq '-') {
1729 sub rules_modify_permissions
{
1730 my ($rule_env) = @_;
1732 if ($rule_env eq 'host') {
1734 check
=> ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1736 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1738 check
=> ['perm', '/', [ 'Sys.Modify' ]],
1740 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1742 check
=> ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1749 sub rules_audit_permissions
{
1750 my ($rule_env) = @_;
1752 if ($rule_env eq 'host') {
1754 check
=> ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1756 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1758 check
=> ['perm', '/', [ 'Sys.Audit' ]],
1760 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1762 check
=> ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1770 my $bridge_firewall_enabled = 0;
1772 sub enable_bridge_firewall
{
1774 return if $bridge_firewall_enabled; # only once
1776 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1777 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1779 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1780 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/ipv4/tcp_syncookies", "1");
1782 $bridge_firewall_enabled = 1;
1785 sub iptables_restore_cmdlist
{
1786 my ($cmdlist, $table) = @_;
1788 $table = 'filter' if !$table;
1789 run_command
(['iptables-restore', '-T', $table, '-n'], input
=> $cmdlist, errmsg
=> "iptables_restore_cmdlist");
1792 sub ip6tables_restore_cmdlist
{
1793 my ($cmdlist, $table) = @_;
1795 $table = 'filter' if !$table;
1796 run_command
(['ip6tables-restore', '-T', $table, '-n'], input
=> $cmdlist, errmsg
=> "iptables_restore_cmdlist");
1799 sub ipset_restore_cmdlist
{
1802 run_command
(['ipset', 'restore'], input
=> $cmdlist, errmsg
=> "ipset_restore_cmdlist");
1805 sub ebtables_restore_cmdlist
{
1808 run_command
(['ebtables-restore'], input
=> $cmdlist, errmsg
=> "ebtables_restore_cmdlist");
1811 sub iptables_get_chains
{
1812 my ($iptablescmd, $t) = @_;
1814 $iptablescmd = "iptables" if !$iptablescmd;
1815 $t = 'filter' if !$t;
1819 # check what chains we want to track
1820 my $is_pvefw_chain = sub {
1823 return 1 if $name =~ m/^PVEFW-\S+$/;
1825 return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1827 return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1829 return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1830 return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1842 return if $line =~ m/^#/;
1843 return if $line =~ m/^\s*$/;
1845 if ($line =~ m/^\*(\S+)$/) {
1850 return if $table ne $t;
1852 if ($line =~ m/^:(\S+)\s/) {
1854 return if !&$is_pvefw_chain($chain);
1855 $res->{$chain} = "unknown";
1856 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1857 my ($chain, $sig) = ($1, $2);
1858 return if !&$is_pvefw_chain($chain);
1859 $res->{$chain} = $sig;
1860 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD|PREROUTING)\s+-j\s+PVEFW-\1$/) {
1863 # simply ignore the rest
1868 run_command
(["$iptablescmd-save"], outfunc
=> $parser);
1870 return wantarray ?
($res, $hooks) : $res;
1873 sub iptables_chain_digest
{
1875 my $digest = Digest
::SHA-
>new('sha1');
1876 foreach my $rule (@$rules) { # order is important
1877 $digest->add($rule);
1879 return $digest->b64digest;
1882 sub ipset_chain_digest
{
1885 my $digest = Digest
::SHA-
>new('sha1');
1886 foreach my $rule (sort @$rules) { # note: sorted
1887 $digest->add($rule);
1889 return $digest->b64digest;
1892 sub ipset_get_chains
{
1900 return if $line =~ m/^#/;
1901 return if $line =~ m/^\s*$/;
1902 if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1904 $line =~ s/\s+$//; # delete trailing white space
1905 push @{$chains->{$chain}}, $line;
1907 # simply ignore the rest
1912 run_command
(['ipset', 'save'], outfunc
=> $parser);
1914 # compute digest for each chain
1915 foreach my $chain (keys %$chains) {
1916 $res->{$chain} = ipset_chain_digest
($chains->{$chain});
1922 sub ebtables_get_chains
{
1928 return if $line =~ m/^#/;
1929 return if $line =~ m/^\s*$/;
1930 if ($line =~ m/^:(\S+)\s\S+$/) {
1931 # Make sure we know chains exist even if they're empty.
1932 $chains->{$1} //= [];
1933 } elsif ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
1936 push @{$chains->{$chain}}, $line;
1938 # simply ignore the rest
1943 run_command
(['ebtables-save'], outfunc
=> $parser);
1944 # compute digest for each chain and store rules as well
1945 foreach my $chain (keys %$chains) {
1946 $res->{$chain}->{rules
} = $chains->{$chain};
1947 $res->{$chain}->{sig
} = iptables_chain_digest
($chains->{$chain});
1952 # substitude action of rule according to action hash
1953 sub rule_substitude_action
{
1954 my ($rule, $actions) = @_;
1956 if (my $action = $rule->{action
}) {
1957 $rule->{action
} = $actions->{$action} if defined($actions->{$action});
1961 # generate a src or dst match
1962 # $dir(ection) is either d or s
1963 sub ipt_gen_src_or_dst_match
{
1964 my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
1969 } elsif ($dir eq 'd') {
1972 die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
1976 if ($adr =~ m/^\+/) {
1977 if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
1980 if ($fw_conf && $fw_conf->{ipset
}->{$name}) {
1981 $ipset_chain = compute_ipset_chain_name
($fw_conf->{vmid
}, $name, $ipversion);
1982 } elsif ($cluster_conf && $cluster_conf->{ipset
}->{$name}) {
1983 $ipset_chain = compute_ipset_chain_name
(0, $name, $ipversion);
1985 die "no such ipset '$name'\n";
1987 $match = "-m set --match-set ${ipset_chain} ${srcdst}";
1989 die "invalid security group name '$adr'\n";
1991 } elsif ($adr =~ m/^${ip_alias_pattern}$/){
1992 my $alias = lc($adr);
1993 my $e = $fw_conf ?
$fw_conf->{aliases
}->{$alias} : undef;
1994 $e = $cluster_conf->{aliases
}->{$alias} if !$e && $cluster_conf;
1995 die "no such alias '$adr'\n" if !$e;
1996 $match = "-${dir} $e->{cidr}";
1997 } elsif ($adr =~ m/\-/){
1998 $match = "-m iprange --${srcdst}-range $adr";
2000 $match = "-${dir} $adr";
2006 # convert a %rule to an array of iptables commands
2007 sub ipt_rule_to_cmds
{
2008 my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
2010 die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
2014 if (defined $rule->{match
}) {
2015 push @match, $rule->{match
};
2017 push @match, "-i $rule->{iface_in}" if $rule->{iface_in
};
2018 push @match, "-o $rule->{iface_out}" if $rule->{iface_out
};
2020 if ($rule->{source
}) {
2021 push @match, ipt_gen_src_or_dst_match
($rule->{source
}, 's', $ipversion, $cluster_conf, $fw_conf);
2023 if ($rule->{dest
}) {
2024 push @match, ipt_gen_src_or_dst_match
($rule->{dest
}, 'd', $ipversion, $cluster_conf, $fw_conf);
2027 if (my $proto = $rule->{proto
}) {
2028 push @match, "-p $proto";
2030 my $multidport = defined($rule->{dport
}) && parse_port_name_number_or_range
($rule->{dport
}, 1);
2031 my $multisport = defined($rule->{sport
}) && parse_port_name_number_or_range
($rule->{sport
}, 0);
2033 my $add_dport = sub {
2034 return if !$rule->{dport
};
2036 if ($proto eq 'icmp') {
2037 # Note: we use dport to store --icmp-type
2038 die "unknown icmp-type '$rule->{dport}'\n"
2039 if $rule->{dport
} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport
}});
2040 push @match, "-m icmp --icmp-type $rule->{dport}";
2041 } elsif ($proto eq 'icmpv6') {
2042 # Note: we use dport to store --icmpv6-type
2043 die "unknown icmpv6-type '$rule->{dport}'\n"
2044 if $rule->{dport
} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport
}});
2045 push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
2046 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
2047 die "protocol $proto does not have ports\n";
2048 } elsif ($multidport) {
2049 push @match, "--match multiport", "--dports $rule->{dport}";
2051 push @match, "--dport $rule->{dport}";
2055 my $add_sport = sub {
2056 return if !$rule->{sport
};
2058 die "protocol $proto does not have ports\n"
2059 if !$PROTOCOLS_WITH_PORTS->{$proto};
2061 push @match, "--match multiport", "--sports $rule->{sport}";
2063 push @match, "--sport $rule->{sport}";
2067 # order matters - single port before multiport!
2068 $add_dport->() if $multisport;
2070 $add_dport->() if !$multisport;
2071 } elsif ($rule->{dport
} || $rule->{sport
}) {
2072 die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport
};
2073 die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport
};
2076 push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype
};
2078 my $matchstr = scalar(@match) ?
join(' ', @match) : "";
2081 if (defined $rule->{target
}) {
2082 $targetstr = $rule->{target
};
2084 my $action = (defined $rule->{action
}) ?
$rule->{action
} : "";
2085 my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
2086 $targetstr = ($goto) ?
"-g $action" : "-j $action";
2090 my $log = $rule->{log};
2091 if (defined($log) && $log ne 'nolog') {
2092 my $loglevel = $log_level_hash->{$log};
2093 my $logaction = get_log_rule_base
($chain, $vmid, $rule->{logmsg
}, $loglevel);
2094 push @iptcmds, "-A $chain $matchstr $logaction";
2096 push @iptcmds, "-A $chain $matchstr $targetstr";
2100 sub ruleset_generate_rule
{
2101 my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf, $vmid) = @_;
2105 if ($rule->{macro}) {
2106 $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
2111 # update all or nothing
2113 foreach my $r (@$rules) {
2114 push @ipt_rule_cmds, ipt_rule_to_cmds
($r, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid);
2116 foreach my $c (@ipt_rule_cmds) {
2117 ruleset_add_ipt_cmd
($ruleset, $chain, $c);
2121 sub ruleset_create_chain
{
2122 my ($ruleset, $chain) = @_;
2124 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
2125 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
2127 die "chain '$chain' already exists\n" if $ruleset->{$chain};
2129 $ruleset->{$chain} = [];
2132 sub ruleset_chain_exist
{
2133 my ($ruleset, $chain) = @_;
2135 return $ruleset->{$chain} ?
1 : undef;
2138 # add an iptables command (like generated by ipt_rule_to_cmds) to a chain
2139 sub ruleset_add_ipt_cmd
{
2140 my ($ruleset, $chain, $iptcmd) = @_;
2142 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2144 push @{$ruleset->{$chain}}, $iptcmd;
2147 sub ruleset_addrule
{
2148 my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
2150 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2153 my $loglevel = $log_level_hash->{$log};
2154 my $logaction = get_log_rule_base
($chain, $vmid, $logmsg, $loglevel);
2155 push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
2157 # for stable ebtables digests avoid double-spaces to match ebtables-save output
2158 $match .= ' ' if length($match);
2159 push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
2162 sub ruleset_insertrule
{
2163 my ($ruleset, $chain, $match, $action, $log) = @_;
2165 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2167 unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2170 sub get_log_rule_base
{
2171 my ($chain, $vmid, $msg, $loglevel) = @_;
2173 $vmid = 0 if !defined($vmid);
2174 $msg = "" if !defined($msg);
2177 if (defined($global_log_ratelimit)) {
2178 $rlimit = "-m limit $global_log_ratelimit ";
2181 # Note: we use special format for prefix to pass further
2182 # info to log daemon (VMID, LOGLEVEL and CHAIN)
2183 return "${rlimit}-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2186 sub ruleset_add_chain_policy {
2187 my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2189 if ($policy eq 'ACCEPT') {
2191 my $rule = { action => 'ACCEPT' };
2192 rule_substitude_action($rule, { ACCEPT => $accept_action});
2193 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2195 } elsif ($policy eq 'DROP') {
2197 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop
");
2199 ruleset_addrule($ruleset, $chain, "", "-j DROP
", $loglevel, "policy
$policy: ", $vmid);
2200 } elsif ($policy eq 'REJECT') {
2201 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject
");
2203 ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject
", $loglevel, "policy
$policy: ", $vmid);
2206 die "internal error
: unknown policy
'$policy'";
2210 sub ruleset_chain_add_ndp {
2211 my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2212 return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2214 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-solicitation
", $accept);
2215 if ($direction ne 'OUT' || $options->{radv}) {
2216 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-advertisement
", $accept);
2218 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type neighbor-solicitation
", $accept);
2219 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type neighbor-advertisement
", $accept);
2222 sub ruleset_chain_add_conn_filters {
2223 my ($ruleset, $chain, $allow_invalid, $accept) = @_;
2225 if (!$allow_invalid) {
2226 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
", "-j DROP
");
2228 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
", "-j
$accept");
2231 sub ruleset_chain_add_input_filters {
2232 my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2234 if ($cluster_conf->{ipset}->{blacklist}){
2235 if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist
")) {
2236 ruleset_create_chain($ruleset, "PVEFW-blacklist
");
2237 ruleset_addrule($ruleset, "PVEFW-blacklist
", "", "-j DROP
", $loglevel, "DROP
: ", 0);
2239 my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2240 ruleset_addrule($ruleset, $chain, "-m set
--match-set
${ipset_chain
} src
", "-j PVEFW-blacklist
");
2243 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2244 if ($ipversion == 4) {
2245 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
,NEW
", "-j PVEFW-smurfs
");
2249 if ($options->{tcpflags}) {
2250 ruleset_addrule($ruleset, $chain, "-p tcp
", "-j PVEFW-tcpflags
");
2254 sub ruleset_create_vm_chain {
2255 my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2257 ruleset_create_chain($ruleset, $chain);
2258 my $accept = generate_nfqueue($options);
2260 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2261 if ($ipversion == 4) {
2262 if ($direction eq 'OUT') {
2263 ruleset_generate_rule($ruleset, $chain, $ipversion,
2264 { action => 'PVEFW-SET-ACCEPT-MARK',
2265 proto => 'udp', sport => 68, dport => 67 });
2267 ruleset_generate_rule($ruleset, $chain, $ipversion,
2268 { action => 'ACCEPT',
2269 proto => 'udp', sport => 67, dport => 68 });
2271 } elsif ($ipversion == 6) {
2272 if ($direction eq 'OUT') {
2273 ruleset_generate_rule($ruleset, $chain, $ipversion,
2274 { action => 'PVEFW-SET-ACCEPT-MARK',
2275 proto => 'udp', sport => 546, dport => 547 });
2277 ruleset_generate_rule($ruleset, $chain, $ipversion,
2278 { action => 'ACCEPT',
2279 proto => 'udp', sport => 547, dport => 546 });
2285 if ($direction eq 'OUT') {
2286 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2287 ruleset_addrule($ruleset, $chain, "-m mac
! --mac-source
$macaddr", "-j DROP
");
2289 if ($ipversion == 6 && !$options->{radv}) {
2290 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-advertisement
", "-j DROP
");
2292 if ($ipfilter_ipset) {
2293 ruleset_addrule($ruleset, $chain, "-m set
! --match-set
$ipfilter_ipset src
", "-j DROP
");
2295 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2298 my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j
$accept";
2299 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2302 sub ruleset_add_group_rule {
2303 my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2305 my $group = $rule->{action};
2306 my $group_chain = "GROUP-
$group-$direction";
2307 if(!ruleset_chain_exist($ruleset, $group_chain)){
2308 generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2311 if ($direction eq 'OUT' && $rule->{iface_out}) {
2312 ruleset_addrule($ruleset, $chain, "-o
$rule->{iface_out
}", "-j
$group_chain");
2313 } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2314 ruleset_addrule($ruleset, $chain, "-i
$rule->{iface_in
}", "-j
$group_chain");
2316 ruleset_addrule($ruleset, $chain, "", "-j
$group_chain");
2319 ruleset_addrule($ruleset, $chain, "-m mark
--mark
$FWACCEPTMARK_ON", "-j
$action");
2322 sub ruleset_generate_vm_rules {
2323 my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion, $vmid) = @_;
2325 my $lc_direction = lc($direction);
2327 my $in_accept = generate_nfqueue($options);
2329 foreach my $rule (@$rules) {
2330 next if $rule->{iface} && $rule->{iface} ne $netid;
2331 next if !$rule->{enable} || $rule->{errors};
2332 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2334 if ($rule->{type} eq 'group') {
2335 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2336 $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2338 next if $rule->{type} ne $lc_direction;
2340 $rule->{logmsg} = "$rule->{action
}: ";
2341 if ($direction eq 'OUT') {
2342 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" });
2343 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2345 rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject
" });
2346 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2354 sub generate_nfqueue {
2357 if ($options->{ips}) {
2358 my $action = "NFQUEUE
";
2359 if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2360 if (defined($3) && defined($1)) {
2361 $action .= " --queue-balance
$1:$3";
2362 } elsif (defined($1)) {
2363 $action .= " --queue-num
$1";
2366 $action .= " --queue-bypass
" if $feature_ipset_nomatch; #need kernel 3.10
2373 sub ruleset_generate_vm_ipsrules {
2374 my ($ruleset, $options, $direction, $iface) = @_;
2376 if ($options->{ips} && $direction eq 'IN') {
2377 my $nfqueue = generate_nfqueue($options);
2379 if (!ruleset_chain_exist($ruleset, "PVEFW-IPS
")) {
2380 ruleset_create_chain($ruleset, "PVEFW-IPS
");
2383 ruleset_addrule($ruleset, "PVEFW-IPS
", "-m physdev
--physdev-out
$iface --physdev-is-bridged
", "-j
$nfqueue");
2387 sub generate_tap_rules_direction {
2388 my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2390 my $lc_direction = lc($direction);
2392 my $rules = $vmfw_conf->{rules};
2394 my $options = $vmfw_conf->{options};
2395 my $loglevel = get_option_log_level($options, "log_level_
${lc_direction
}");
2397 my $tapchain = "$iface-$direction";
2399 my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2400 my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2401 if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2403 if ($options->{enable}) {
2404 # create chain with mac and ip filter
2405 ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2407 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion, $vmid);
2409 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2414 if ($direction eq 'OUT') {
2415 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2417 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2420 my $accept = generate_nfqueue($options);
2421 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : $accept;
2422 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2424 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : 'ACCEPT';
2425 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2428 # plug the tap chain to bridge chain
2429 if ($direction eq 'IN') {
2430 ruleset_addrule($ruleset, "PVEFW-FWBR-IN
",
2431 "-m physdev
--physdev-is-bridged
--physdev-out
$iface", "-j
$tapchain");
2433 ruleset_addrule($ruleset, "PVEFW-FWBR-OUT
",
2434 "-m physdev
--physdev-is-bridged
--physdev-in
$iface", "-j
$tapchain");
2438 sub enable_host_firewall {
2439 my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf) = @_;
2441 my $options = $hostfw_conf->{options};
2442 my $cluster_options = $cluster_conf->{options};
2443 my $rules = $hostfw_conf->{rules};
2444 my $cluster_rules = $cluster_conf->{rules};
2446 # corosync preparation
2447 my $corosync_rule = "-p udp
--dport
5404:5405";
2448 my $corosync_local_addresses = {};
2449 my $multicast_enabled;
2450 my $local_hostname = PVE::INotify::nodename();
2451 if (defined($corosync_conf)) {
2452 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2453 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2455 if ($node_name eq $local_hostname) {
2456 $corosync_local_addresses->{$key} = $node_ip;
2460 # allow multicast only if enabled in config
2461 my $corosync_transport = $corosync_conf->{main}->{totem}->{transport};
2462 $multicast_enabled = defined($corosync_transport) && $corosync_transport eq 'udp';
2465 # host inbound firewall
2466 my $chain = "PVEFW-HOST-IN
";
2467 ruleset_create_chain($ruleset, $chain);
2469 my $loglevel = get_option_log_level($options, "log_level_in
");
2471 ruleset_addrule($ruleset, $chain, "-i lo
", "-j ACCEPT
");
2473 ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2474 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2475 ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2477 # we use RETURN because we need to check also tap rules
2478 my $accept_action = 'RETURN';
2480 ruleset_addrule($ruleset, $chain, "-p igmp
", "-j
$accept_action"); # important for multicast
2482 # add host rules first, so that cluster wide rules can be overwritten
2483 foreach my $rule (@$rules, @$cluster_rules) {
2484 next if !$rule->{enable} || $rule->{errors};
2485 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2487 $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2490 if ($rule->{type} eq 'group') {
2491 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2492 } elsif ($rule->{type} eq 'in') {
2493 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" });
2494 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2498 delete $rule->{iface_in};
2501 # allow standard traffic for management ipset (includes cluster network)
2502 my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management
", $ipversion);
2503 my $mngmntsrc = "-m set
--match-set
${mngmnt_ipset_chain
} src
";
2504 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
8006", "-j
$accept_action"); # PVE API
2505 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
5900:5999", "-j
$accept_action"); # PVE VNC Console
2506 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
3128", "-j
$accept_action"); # SPICE Proxy
2507 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
22", "-j
$accept_action"); # SSH
2508 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
60000:60050", "-j
$accept_action"); # Migration
2510 # corosync inbound rules
2511 if (defined($corosync_conf)) {
2512 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
$corosync_rule", "-j
$accept_action")
2513 if $multicast_enabled;
2515 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2516 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2517 my $destination = $corosync_local_addresses->{$key};
2519 if ($node_name ne $local_hostname && defined($destination)) {
2520 # accept only traffic on same ring
2521 ruleset_addrule($ruleset, $chain, "-d
$destination -s
$node_ip $corosync_rule", "-j
$accept_action");
2526 # implement input policy
2527 my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2528 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2530 # host outbound firewall
2531 $chain = "PVEFW-HOST-OUT
";
2532 ruleset_create_chain($ruleset, $chain);
2534 $loglevel = get_option_log_level($options, "log_level_out
");
2536 ruleset_addrule($ruleset, $chain, "-o lo
", "-j ACCEPT
");
2538 ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2540 # we use RETURN because we may want to check other thigs later
2541 $accept_action = 'RETURN';
2542 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j
$accept_action");
2544 ruleset_addrule($ruleset, $chain, "-p igmp
", "-j
$accept_action"); # important for multicast
2546 # add host rules first, so that cluster wide rules can be overwritten
2547 foreach my $rule (@$rules, @$cluster_rules) {
2548 next if !$rule->{enable} || $rule->{errors};
2549 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2551 $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2553 $rule->{logmsg} = "$rule->{action
}: ";
2554 if ($rule->{type} eq 'group') {
2555 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2556 } elsif ($rule->{type} eq 'out') {
2557 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" });
2558 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2562 delete $rule->{iface_out};
2565 # allow standard traffic on cluster network
2566 my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2567 my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2569 if ($localnet && ($ipversion == $localnet_ver)) {
2570 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
8006", "-j
$accept_action"); # PVE API
2571 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
22", "-j
$accept_action"); # SSH
2572 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
5900:5999", "-j
$accept_action"); # PVE VNC Console
2573 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
3128", "-j
$accept_action"); # SPICE Proxy
2576 # corosync outbound rules
2577 if (defined($corosync_conf)) {
2578 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
$corosync_rule", "-j
$accept_action")
2579 if $multicast_enabled;
2581 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2582 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2583 my $source = $corosync_local_addresses->{$key};
2585 if ($node_name ne $local_hostname && defined($source)) {
2586 # accept only traffic on same ring
2587 ruleset_addrule($ruleset, $chain, "-s
$source -d
$node_ip $corosync_rule", "-j
$accept_action");
2592 # implement output policy
2593 $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2594 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2596 ruleset_addrule($ruleset, "PVEFW-OUTPUT
", "", "-j PVEFW-HOST-OUT
");
2597 ruleset_addrule($ruleset, "PVEFW-INPUT
", "", "-j PVEFW-HOST-IN
");
2600 sub generate_group_rules {
2601 my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2603 my $rules = $cluster_conf->{groups}->{$group};
2606 warn "no such security group
'$group'\n";
2607 $rules = []; # create empty chain
2610 my $chain = "GROUP-
${group
}-IN
";
2612 ruleset_create_chain($ruleset, $chain);
2613 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2615 foreach my $rule (@$rules) {
2616 next if $rule->{type} ne 'in';
2617 next if !$rule->{enable} || $rule->{errors};
2618 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2619 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" });
2620 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2623 $chain = "GROUP-
${group
}-OUT
";
2625 ruleset_create_chain($ruleset, $chain);
2626 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2628 foreach my $rule (@$rules) {
2629 next if $rule->{type} ne 'out';
2630 next if !$rule->{enable} || $rule->{errors};
2631 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2632 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2633 # check also other tap rules later
2634 rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject
" });
2635 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2640 my $valid_netdev_names = {};
2641 for (my $i = 0; $i < $MAX_NETS; $i++) {
2642 $valid_netdev_names->{"net
$i"} = 1;
2645 sub get_mark_values {
2646 my ($value, $mask) = @_;
2647 $value = hex($value) if $value =~ /^0x/;
2648 $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2649 $mask = 0xffffffff if !defined($mask);
2650 return ($value, $mask);
2654 my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env) = @_;
2656 my $orig_line = $line;
2660 # we can add single line comments to the end of the rule
2661 if ($line =~ s/#\s*(.*?)\s*$//) {
2662 $rule->{comment} = decode('utf8', $1);
2665 # we can disable a rule when prefixed with '|'
2667 $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2669 $line =~ s/^(\S+)\s+(\S+)\s*// ||
2670 die "unable to parse rule
: $line\n";
2672 $rule->{type} = lc($1);
2673 $rule->{action} = $2;
2675 if ($rule->{type} eq 'in' || $rule->{type} eq 'out') {
2676 if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2677 $rule->{macro} = $1;
2678 $rule->{action} = $2;
2682 while (length($line)) {
2683 if ($line =~ s/^-i (\S+)\s*//) {
2684 $rule->{iface} = $1;
2688 last if $rule->{type} eq 'group';
2690 if ($line =~ s/^-p (\S+)\s*//) {
2691 $rule->{proto} = $1;
2695 if ($line =~ s/^-dport (\S+)\s*//) {
2696 $rule->{dport} = $1;
2700 if ($line =~ s/^-sport (\S+)\s*//) {
2701 $rule->{sport} = $1;
2704 if ($line =~ s/^-source (\S+)\s*//) {
2705 $rule->{source} = $1;
2708 if ($line =~ s/^-dest (\S+)\s*//) {
2712 if ($line =~ s/^-log (emerg|alert|crit|err|warning|notice|info|debug|nolog)\s*//) {
2720 die "unable to parse rule parameters
: $line\n" if length($line);
2722 $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2723 if ($rule->{errors}) {
2724 # The verbose flag really means we're running from the CLI and want
2725 # output on the console - in the other case we really want such errors
2726 # to go into the syslog instead.
2727 my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2728 $log->("$prefix - errors
in rule parameters
: $orig_line\n");
2729 foreach my $p (keys %{$rule->{errors}}) {
2730 $log->(" $p: $rule->{errors
}->{$p}\n");
2737 sub verify_ethertype {
2739 my $types = get_etc_ethertypes();
2740 die "unknown ethernet protocol type
: $value\n"
2741 if !defined($types->{byname}->{$value}) &&
2742 !defined($types->{byid}->{$value});
2745 sub parse_vmfw_option {
2750 my $loglevels = "emerg
|alert
|crit
|err
|warning
|notice
|info
|debug
|nolog
";
2752 if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2755 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2757 $value = $2 ? lc($3) : '';
2758 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2761 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2764 } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
2767 verify_ethertype($_) foreach split(/\s*,\s*/, $value);
2769 die "can
't parse option '$line'\n"
2772 return ($opt, $value);
2775 sub parse_hostfw_option {
2780 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2782 if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid|protection_synflood):\s*(0|1)\s*$/i) {
2785 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2787 $value = $2 ? lc($3) : '';
2788 } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established|nf_conntrack_tcp_timeout_syn_recv|protection_synflood_rate|protection_synflood_burst|protection_limit):\s*(\d+)\s*$/i) {
2792 die "can't parse option
'$line'\n"
2795 return ($opt, $value);
2798 sub parse_clusterfw_option {
2803 if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2806 if (($value > 1) && ((time() - $value) > 60)) {
2809 } elsif ($line =~ m/^(ebtables):\s*(0|1)\s*$/i) {
2812 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2815 } elsif ($line =~ m/^(log_ratelimit):\s*(\S+)\s*$/) {
2819 die "can
't parse option '$line'\n"
2822 return ($opt, $value);
2826 my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2828 my $alias = lc($cidr);
2829 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2830 $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2832 die "no such alias '$cidr'\n" if !$e;;
2834 return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2837 sub parse_ip_or_cidr {
2842 if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2845 } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2849 die "value does not look like a valid IP address or CIDR network\n";
2852 return wantarray ? ($cidr, $ipversion) : $cidr;
2858 # we can add single line comments to the end of the line
2859 my $comment = decode('utf8
', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2861 if ($line =~ m/^(\S+)\s(\S+)$/) {
2862 my ($name, $cidr) = ($1, $2);
2865 ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2870 ipversion => $ipversion,
2872 $data->{comment} = $comment if $comment;
2879 sub generic_fw_config_parser {
2880 my ($filename, $cluster_conf, $empty_conf, $rule_env) = @_;
2885 my $res = $empty_conf;
2888 if ($filename =~ m!^/etc/pve/(.*)$!) {
2889 $raw = PVE::Cluster::get_config($1);
2891 $raw = eval { PVE::Tools::file_get_contents($filename) }; # ignore errors
2896 while ($raw =~ /^\h*(.*?)\h*$/gm) {
2899 next if $line =~ m/^#/;
2900 next if $line =~ m/^\s*$/;
2903 my $prefix = "$filename (line $linenr)";
2905 if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2906 $section = 'options
';
2910 if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2911 $section = 'aliases
';
2915 if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2916 $section = 'groups
';
2920 die "security group name too long\n" if length($group) > $max_group_name_length;
2921 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2924 ($section, $group, $comment) = undef;
2925 warn "$prefix: $err";
2929 $res->{$section}->{$group} = [];
2930 $res->{group_comments}->{$group} = decode('utf8
', $comment)
2935 if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2940 if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2945 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2946 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2949 ($section, $group, $comment) = undef;
2950 warn "$prefix: $err";
2954 $res->{$section}->{$group} = [];
2955 $res->{ipset_comments}->{$group} = decode('utf8
', $comment)
2961 warn "$prefix: skip line - no section\n";
2965 if ($section eq 'options
') {
2968 if ($rule_env eq 'cluster
') {
2969 ($opt, $value) = parse_clusterfw_option($line);
2970 } elsif ($rule_env eq 'host
') {
2971 ($opt, $value) = parse_hostfw_option($line);
2973 ($opt, $value) = parse_vmfw_option($line);
2975 $res->{options}->{$opt} = $value;
2977 warn "$prefix: $@" if $@;
2978 } elsif ($section eq 'aliases
') {
2980 my $data = parse_alias($line);
2981 $res->{aliases}->{lc($data->{name})} = $data;
2983 warn "$prefix: $@" if $@;
2984 } elsif ($section eq 'rules
') {
2986 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env); };
2988 warn "$prefix: $err";
2991 push @{$res->{$section}}, $rule;
2992 } elsif ($section eq 'groups
') {
2994 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group
'); };
2996 warn "$prefix: $err";
2999 push @{$res->{$section}->{$group}}, $rule;
3000 } elsif ($section eq 'ipset
') {
3001 # we can add single line comments to the end of the rule
3002 my $comment = decode('utf8
', $1) if $line =~ s/#\s*(.*?)\s*$//;
3004 $line =~ m/^(\!)?\s*(\S+)\s*$/;
3009 if ($nomatch && !$feature_ipset_nomatch) {
3010 $errors->{nomatch} = "nomatch not supported by kernel";
3014 if ($cidr =~ m/^${ip_alias_pattern}$/) {
3015 resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
3017 $cidr = parse_ip_or_cidr($cidr);
3022 $errors->{cidr} = $err;
3025 if ($cidr =~ m!/0+$!) {
3026 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
3029 my $entry = { cidr => $cidr };
3030 $entry->{nomatch} = 1 if $nomatch;
3031 $entry->{comment} = $comment if $comment;
3032 $entry->{errors} = $errors if $errors;
3034 if ($verbose && $errors) {
3035 warn "$prefix - errors in ipset '$group': $line\n";
3036 foreach my $p (keys %{$errors}) {
3037 warn " $p: $errors->{$p}\n";
3041 push @{$res->{$section}->{$group}}, $entry;
3043 warn "$prefix: skip line - unknown section\n";
3052 my ($code, @param) = @_;
3056 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
3063 sub read_local_vm_config {
3068 my $vmdata = { qemu => $qemu, lxc => $lxc };
3070 my $vmlist = PVE::Cluster::get_vmlist();
3071 return $vmdata if !$vmlist || !$vmlist->{ids};
3072 my $ids = $vmlist->{ids};
3074 foreach my $vmid (keys %$ids) {
3075 next if !$vmid; # skip VE0
3076 my $d = $ids->{$vmid};
3077 next if !$d->{node} || $d->{node} ne $nodename;
3078 next if !$d->{type};
3079 if ($d->{type} eq 'qemu
') {
3080 if ($have_qemu_server) {
3081 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
3082 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3083 $qemu->{$vmid} = $conf;
3086 } elsif ($d->{type} eq 'lxc
') {
3088 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
3089 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3090 $lxc->{$vmid} = $conf;
3099 sub load_vmfw_conf {
3100 my ($cluster_conf, $rule_env, $vmid, $dir) = @_;
3102 $dir = $pvefw_conf_dir if !defined($dir);
3103 my $filename = "$dir/$vmid.fw";
3110 ipset_comments => {},
3113 my $vmfw_conf = generic_fw_config_parser($filename, $cluster_conf, $empty_conf, $rule_env);
3114 $vmfw_conf->{vmid} = $vmid;
3119 my $format_rules = sub {
3120 my ($rules, $allow_iface) = @_;
3124 foreach my $rule (@$rules) {
3125 if ($rule->{type} eq 'in' || $rule->{type} eq 'out
' || $rule->{type} eq 'group
') {
3126 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
3127 $raw .= uc($rule->{type});
3128 if ($rule->{macro}) {
3129 $raw .= " $rule->{macro}($rule->{action})";
3131 $raw .= " " . $rule->{action};
3133 if ($allow_iface && $rule->{iface}) {
3134 $raw .= " -i $rule->{iface}";
3137 if ($rule->{type} ne 'group
') {
3138 $raw .= " -source $rule->{source}" if $rule->{source};
3139 $raw .= " -dest $rule->{dest}" if $rule->{dest};
3140 $raw .= " -p $rule->{proto}" if $rule->{proto};
3141 $raw .= " -dport $rule->{dport}" if $rule->{dport};
3142 $raw .= " -sport $rule->{sport}" if $rule->{sport};
3143 $raw .= " -log $rule->{log}" if $rule->{log};
3146 $raw .= " # " . encode('utf8
', $rule->{comment})
3147 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
3150 die "unknown rule type '$rule->{type
}'";
3157 my $format_options = sub {
3162 $raw .= "[OPTIONS]\n\n";
3163 foreach my $opt (keys %$options) {
3164 $raw .= "$opt: $options->{$opt}\n";
3171 my $format_aliases = sub {
3176 $raw .= "[ALIASES]\n\n";
3177 foreach my $k (keys %$aliases) {
3178 my $e = $aliases->{$k};
3179 $raw .= "$e->{name} $e->{cidr}";
3180 $raw .= " # " . encode('utf8
', $e->{comment})
3181 if $e->{comment} && $e->{comment} !~ m/^\s*$/;
3189 my $format_ipsets = sub {
3194 foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
3195 if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
3196 my $utf8comment = encode('utf8
', $comment);
3197 $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3199 $raw .= "[IPSET $ipset]\n\n";
3201 my $options = $fw_conf->{ipset}->{$ipset};
3204 foreach my $entry (@$options) {
3205 $nethash->{$entry->{cidr}} = $entry;
3208 foreach my $cidr (sort keys %$nethash) {
3209 my $entry = $nethash->{$cidr};
3210 my $line = $entry->{nomatch} ? '!' : '';
3211 $line .= $entry->{cidr};
3212 $line .= " # " . encode('utf8
', $entry->{comment})
3213 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3223 sub save_vmfw_conf {
3224 my ($vmid, $vmfw_conf) = @_;
3228 my $options = $vmfw_conf->{options};
3229 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3231 my $aliases = $vmfw_conf->{aliases};
3232 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3234 $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
3236 my $rules = $vmfw_conf->{rules} || [];
3237 if ($rules && scalar(@$rules)) {
3238 $raw .= "[RULES]\n\n";
3239 $raw .= &$format_rules($rules, 1);
3243 my $filename = "$pvefw_conf_dir/$vmid.fw";
3245 mkdir $pvefw_conf_dir;
3246 PVE::Tools::file_set_contents($filename, $raw);
3252 sub remove_vmfw_conf {
3255 my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3257 unlink $vmfw_conffile;
3260 sub clone_vmfw_conf {
3261 my ($vmid, $newid) = @_;
3263 my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3264 my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3266 if (-f $clonevm_conffile) {
3267 unlink $clonevm_conffile;
3269 if (-f $sourcevm_conffile) {
3270 my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3271 PVE::Tools::file_set_contents($clonevm_conffile, $data);
3275 sub read_vm_firewall_configs {
3276 my ($cluster_conf, $vmdata, $dir) = @_;
3278 my $vmfw_configs = {};
3280 foreach my $vmid (keys %{$vmdata->{qemu}}) {
3281 my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm
', $vmid, $dir);
3282 next if !$vmfw_conf->{options}; # skip if file does not exist
3283 $vmfw_configs->{$vmid} = $vmfw_conf;
3285 foreach my $vmid (keys %{$vmdata->{lxc}}) {
3286 my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct
', $vmid, $dir);
3287 next if !$vmfw_conf->{options}; # skip if file does not exist
3288 $vmfw_configs->{$vmid} = $vmfw_conf;
3291 return $vmfw_configs;
3294 sub get_option_log_level {
3295 my ($options, $k) = @_;
3297 my $v = $options->{$k};
3298 $v = $default_log_level if !defined($v);
3300 return undef if $v eq '' || $v eq 'nolog
';
3302 return $v if defined($log_level_hash->{$v});
3304 warn "unknown log level ($k = '$v')\n";
3309 sub generate_std_chains {
3310 my ($ruleset, $options, $ipversion) = @_;
3312 my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3314 my $loglevel = get_option_log_level($options, 'smurf_log_level
');
3315 my $chain = 'PVEFW-smurflog
';
3316 if ( $std_chains->{$chain} ) {
3317 foreach my $r (@{$std_chains->{$chain}}) {
3318 $r->{log} = $loglevel;
3322 # same as shorewall logflags action.
3323 $loglevel = get_option_log_level($options, 'tcp_flags_log_level
');
3324 $chain = 'PVEFW-logflags
';
3325 if ( $std_chains->{$chain} ) {
3326 foreach my $r (@{$std_chains->{$chain}}) {
3327 $r->{log} = $loglevel;
3331 foreach my $chain (keys %$std_chains) {
3332 ruleset_create_chain($ruleset, $chain);
3333 foreach my $rule (@{$std_chains->{$chain}}) {
3335 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, 0);
3337 die "rule $rule as string - should not happen";
3343 sub generate_ipset_chains {
3344 my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3346 foreach my $ipset (keys %{$ipsets}) {
3348 my $options = $ipsets->{$ipset};
3350 if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3351 if (my $ips = $device_ips->{$1}) {
3352 $options = [@$options, @$ips];
3358 foreach my $entry (@$options) {
3359 next if $entry->{errors}; # skip entries with errors
3362 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3363 ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3365 ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3367 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3369 # ip_compress_address takes an address only, no CIDR
3370 my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3371 $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3372 $cidr .= $prefix_len if defined($prefix_len);
3378 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3383 foreach my $ipversion (4, 6) {
3384 my $data = $nethash->{$ipversion};
3386 my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3388 my $hashsize = scalar(@$options);
3389 if ($hashsize <= 64) {
3392 $hashsize = round_powerof2($hashsize);
3395 my $family = $ipversion == "6" ? "inet6" : "inet";
3397 $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3399 foreach my $cidr (sort keys %$data) {
3400 my $entry = $data->{$cidr};
3402 my $cmd = "add $name $cidr";
3403 if ($entry->{nomatch}) {
3404 if ($feature_ipset_nomatch) {
3405 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3407 warn "ignore !$cidr - nomatch not supported by kernel\n";
3410 push @{$ipset_ruleset->{$name}}, $cmd;
3417 sub round_powerof2 {
3421 $int |= $int >> $_ foreach (1,2,4,8,16);
3425 my $set_global_log_ratelimit = sub {
3426 my $cluster_opts = shift;
3428 $global_log_ratelimit = '--limit
1/sec
';
3429 if (defined(my $log_rlimit = $cluster_opts->{log_ratelimit})) {
3430 my $ll_format = $cluster_option_properties->{log_ratelimit}->{format};
3431 my $limit = PVE::JSONSchema::parse_property_string($ll_format, $log_rlimit);
3433 if ($limit->{enable}) {
3434 if (my $rate = $limit->{rate}) {
3435 $global_log_ratelimit = "--limit $rate";
3437 if (my $burst = $limit->{burst}) {
3438 $global_log_ratelimit .= " --limit-burst $burst";
3441 $global_log_ratelimit = undef;
3446 sub load_clusterfw_conf {
3447 my ($filename) = @_;
3449 $filename = $clusterfw_conf_filename if !defined($filename);
3455 group_comments => {},
3457 ipset_comments => {},
3460 my $cluster_conf = generic_fw_config_parser($filename, $empty_conf, $empty_conf, 'cluster
');
3461 $set_global_log_ratelimit->($cluster_conf->{options});
3463 return $cluster_conf;
3466 sub save_clusterfw_conf {
3467 my ($cluster_conf) = @_;
3471 my $options = $cluster_conf->{options};
3472 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3474 my $aliases = $cluster_conf->{aliases};
3475 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3477 $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3479 my $rules = $cluster_conf->{rules};
3480 if ($rules && scalar(@$rules)) {
3481 $raw .= "[RULES]\n\n";
3482 $raw .= &$format_rules($rules, 1);
3486 if ($cluster_conf->{groups}) {
3487 foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3488 my $rules = $cluster_conf->{groups}->{$group};
3489 if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3490 my $utf8comment = encode('utf8
', $comment);
3491 $raw .= "[group $group] # $utf8comment\n\n";
3493 $raw .= "[group $group]\n\n";
3496 $raw .= &$format_rules($rules, 0);
3502 mkdir $pvefw_conf_dir;
3503 PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3505 unlink $clusterfw_conf_filename;
3509 sub load_hostfw_conf {
3510 my ($cluster_conf, $filename) = @_;
3512 $filename = $hostfw_conf_filename if !defined($filename);
3514 my $empty_conf = { rules => [], options => {}};
3515 return generic_fw_config_parser($filename, $cluster_conf, $empty_conf, 'host
');
3518 sub save_hostfw_conf {
3519 my ($hostfw_conf) = @_;
3523 my $options = $hostfw_conf->{options};
3524 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3526 my $rules = $hostfw_conf->{rules};
3527 if ($rules && scalar(@$rules)) {
3528 $raw .= "[RULES]\n\n";
3529 $raw .= &$format_rules($rules, 1);
3534 PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3536 unlink $hostfw_conf_filename;
3541 my ($cluster_conf, $hostfw_conf, $vmdata, $corosync_conf) = @_;
3545 # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3546 $pve_std_chains = dclone($pve_std_chains_conf);
3548 if ($vmdata) { # test mode
3549 my $testdir = $vmdata->{testdir} || die "no test directory specified";
3550 my $filename = "$testdir/cluster.fw";
3551 $cluster_conf = load_clusterfw_conf($filename);
3553 $filename = "$testdir/host.fw";
3554 $hostfw_conf = load_hostfw_conf($cluster_conf, $filename);
3556 $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir);
3557 } else { # normal operation
3558 $cluster_conf = load_clusterfw_conf(undef) if !$cluster_conf;
3560 $hostfw_conf = load_hostfw_conf($cluster_conf, undef) if !$hostfw_conf;
3562 # cfs_update is handled by daemon or API
3563 $corosync_conf = PVE::Cluster::cfs_read_file("corosync.conf")
3564 if !defined($corosync_conf) && PVE::Corosync::check_conf_exists(1);
3566 $vmdata = read_local_vm_config();
3567 $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef);
3570 return ({},{},{},{}) if !$cluster_conf->{options}->{enable};
3573 if ($cluster_conf->{aliases}->{local_network}) {
3574 $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3577 ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3579 $cluster_conf->{aliases}->{local_network} = {
3580 name => 'local_network
', cidr => $localnet, ipversion => $localnet_ver };
3583 push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3587 $ruleset->{filter} = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3588 $ruleset->{raw} = compile_iptables_raw($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3589 $rulesetv6->{filter} = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
3590 $rulesetv6->{raw} = compile_iptables_raw($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
3591 my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata);
3592 my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3594 return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
3597 sub compile_iptables_raw {
3598 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
3602 my $hostfw_options = $hostfw_conf->{options} || {};
3603 my $protection_synflood = $hostfw_options->{protection_synflood} || 0;
3605 if($protection_synflood) {
3607 my $protection_synflood_rate = $hostfw_options->{protection_synflood_rate} ? $hostfw_options->{protection_synflood_rate} : 200;
3608 my $protection_synflood_burst = $hostfw_options->{protection_synflood_burst} ? $hostfw_options->{protection_synflood_burst} : 1000;
3609 my $protection_synflood_limit = $hostfw_options->{protection_synflood_limit} ? $hostfw_options->{protection_synflood_limit} : 3000;
3610 my $protection_synflood_expire = $hostfw_options->{nf_conntrack_tcp_timeout_syn_recv} ? $hostfw_options->{nf_conntrack_tcp_timeout_syn_recv} : 60;
3611 $protection_synflood_expire = $protection_synflood_expire * 1000;
3612 my $protection_synflood_mask = $ipversion == 4 ? 32 : 64;
3614 ruleset_create_chain($ruleset, "PVEFW-PREROUTING");
3615 ruleset_addrule($ruleset, "PVEFW-PREROUTING", "-p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -m hashlimit --hashlimit-above $protection_synflood_rate/sec --hashlimit-burst $protection_synflood_burst --hashlimit-mode srcip --hashlimit-name syn --hashlimit-htable-size 2097152 --hashlimit-srcmask $protection_synflood_mask --hashlimit-htable-expire $protection_synflood_expire", "-j DROP");
3621 sub compile_iptables_filter {
3622 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
3626 ruleset_create_chain($ruleset, "PVEFW-INPUT");
3627 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3629 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3631 my $hostfw_options = $hostfw_conf->{options} || {};
3633 # fixme: what log level should we use here?
3634 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3636 my $conn_allow_invalid = $hostfw_options->{nf_conntrack_allow_invalid} // 0;
3637 ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", $conn_allow_invalid, "ACCEPT");
3639 ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3640 ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3642 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3644 ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3645 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3647 generate_std_chains($ruleset, $hostfw_options, $ipversion);
3649 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3651 if ($hostfw_enable) {
3652 eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf); };
3653 warn $@ if $@; # just to be sure - should not happen
3656 # generate firewall rules for QEMU VMs
3657 foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3659 my $conf = $vmdata->{qemu}->{$vmid};
3660 my $vmfw_conf = $vmfw_configs->{$vmid};
3661 return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3663 foreach my $netid (sort keys %$conf) {
3664 next if $netid !~ m/^net(\d+)$/;
3665 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3666 next if !$net->{firewall};
3668 my $iface = "tap${vmid}i$1";
3669 my $macaddr = $net->{macaddr};
3670 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3671 $vmfw_conf, $vmid, 'IN
', $ipversion);
3672 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3673 $vmfw_conf, $vmid, 'OUT
', $ipversion);
3676 warn $@ if $@; # just to be sure - should not happen
3679 # generate firewall rules for LXC containers
3680 foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3682 my $conf = $vmdata->{lxc}->{$vmid};
3683 my $vmfw_conf = $vmfw_configs->{$vmid};
3684 return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3686 foreach my $netid (sort keys %$conf) {
3687 next if $netid !~ m/^net(\d+)$/;
3688 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3689 next if !$net->{firewall};
3691 my $iface = "veth${vmid}i$1";
3692 my $macaddr = $net->{hwaddr};
3693 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3694 $vmfw_conf, $vmid, 'IN
', $ipversion);
3695 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3696 $vmfw_conf, $vmid, 'OUT
', $ipversion);
3699 warn $@ if $@; # just to be sure - should not happen
3702 if (ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3703 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3709 sub mac_to_linklocal {
3711 my @parts = split(/:/, $macaddr);
3712 # The standard link local address uses the fe80::/64 prefix with the
3713 # modified EUI-64 identifier derived from the MAC address by flipping the
3714 # universal/local bit and inserting FF:FE in the middle.
3716 $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3717 my @meui64 = (@parts[0,1,2], 'ff
', 'fe
', @parts[3,4,5]);
3718 return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3721 sub compile_ipsets {
3722 my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3725 if ($cluster_conf->{aliases}->{local_network}) {
3726 $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3729 ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3731 $cluster_conf->{aliases}->{local_network} = {
3732 name => 'local_network
', cidr => $localnet, ipversion => $localnet_ver };
3735 push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3738 my $ipset_ruleset = {};
3740 # generate ipsets for QEMU VMs
3741 foreach my $vmid (keys %{$vmdata->{qemu}}) {
3743 my $conf = $vmdata->{qemu}->{$vmid};
3744 my $vmfw_conf = $vmfw_configs->{$vmid};
3745 return if !$vmfw_conf;
3747 # When the 'ipfilter
' option is enabled every device for which there
3748 # is no 'ipfilter-netX
' ipset defiend gets an implicit empty default
3750 # The reason is that ipfilter ipsets are always filled with standard
3751 # IPv6 link-local filters.
3752 my $ipsets = $vmfw_conf->{ipset};
3753 my $implicit_sets = {};
3755 my $device_ips = {};
3756 foreach my $netid (keys %$conf) {
3757 next if $netid !~ m/^net(\d+)$/;
3758 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3759 next if !$net->{firewall};
3761 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3762 $implicit_sets->{"ipfilter-$netid"} = [];
3765 my $macaddr = $net->{macaddr};
3766 my $linklocal = mac_to_linklocal($macaddr);
3767 $device_ips->{$netid} = [
3768 { cidr => $linklocal },
3769 { cidr => 'fe80
::/10', nomatch => 1 }
3773 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3774 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3776 warn $@ if $@; # just to be sure - should not happen
3779 # generate firewall rules for LXC containers
3780 foreach my $vmid (keys %{$vmdata->{lxc}}) {
3782 my $conf = $vmdata->{lxc}->{$vmid};
3783 my $vmfw_conf = $vmfw_configs->{$vmid};
3784 return if !$vmfw_conf;
3786 # When the 'ipfilter
' option is enabled every device for which there
3787 # is no 'ipfilter-netX
' ipset defiend gets an implicit empty default
3789 # The reason is that ipfilter ipsets are always filled with standard
3790 # IPv6 link-local filters, as well as the IP addresses configured
3791 # for the container.
3792 my $ipsets = $vmfw_conf->{ipset};
3793 my $implicit_sets = {};
3795 my $device_ips = {};
3796 foreach my $netid (keys %$conf) {
3797 next if $netid !~ m/^net(\d+)$/;
3798 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3799 next if !$net->{firewall};
3801 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3802 $implicit_sets->{"ipfilter-$netid"} = [];
3805 my $macaddr = $net->{hwaddr};
3806 my $linklocal = mac_to_linklocal($macaddr);
3807 my $set = $device_ips->{$netid} = [
3808 { cidr => $linklocal },
3809 { cidr => 'fe80
::/10', nomatch => 1 }
3811 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3812 push @$set, { cidr => $1 };
3814 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3815 push @$set, { cidr => $1 };
3819 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3820 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3822 warn $@ if $@; # just to be sure - should not happen
3825 generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3827 return $ipset_ruleset;
3830 sub compile_ebtables_filter {
3831 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata) = @_;
3833 if (!($cluster_conf->{options}->{ebtables} // 1)) {
3839 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3841 ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3842 #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED
', to speedup rules
3843 ruleset_addrule($ruleset, 'PVEFW-FORWARD
', '-p IPv4
', '-j ACCEPT
');
3844 ruleset_addrule($ruleset, 'PVEFW-FORWARD
', '-p IPv6
', '-j ACCEPT
');
3845 ruleset_addrule($ruleset, 'PVEFW-FORWARD
', '-o fwln
+', '-j PVEFW-FWBR-OUT
');
3847 # generate firewall rules for QEMU VMs
3848 foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3850 my $conf = $vmdata->{qemu}->{$vmid};
3851 my $vmfw_conf = $vmfw_configs->{$vmid};
3852 return if !$vmfw_conf;
3853 my $ipsets = $vmfw_conf->{ipset};
3855 foreach my $netid (sort keys %$conf) {
3856 next if $netid !~ m/^net(\d+)$/;
3857 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3858 next if !$net->{firewall};
3859 my $iface = "tap${vmid}i$1";
3860 my $macaddr = $net->{macaddr};
3862 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3863 foreach my $ipaddr (@$ipset) {
3864 my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3865 next if !$ip || ($version && $version != 4);
3866 push(@$arpfilter, $ip);
3869 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3872 warn $@ if $@; # just to be sure - should not happen
3875 # generate firewall rules for LXC containers
3876 foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3878 my $conf = $vmdata->{lxc}->{$vmid};
3880 my $vmfw_conf = $vmfw_configs->{$vmid};
3881 return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3882 my $ipsets = $vmfw_conf->{ipset};
3884 foreach my $netid (sort keys %$conf) {
3885 next if $netid !~ m/^net(\d+)$/;
3886 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3887 next if !$net->{firewall};
3888 my $iface = "veth${vmid}i$1";
3889 my $macaddr = $net->{hwaddr};
3891 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3892 foreach my $ipaddr (@$ipset) {
3893 my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3894 next if !$ip || ($version && $version != 4);
3895 push(@$arpfilter, $ip);
3898 if (defined(my $ip = $net->{ip}) && $vmfw_conf->{options}->{ipfilter}) {
3899 # ebtables changes this to a .0/MASK network but we just
3900 # want the address here, no network - see #2193
3902 push @$arpfilter, $ip;
3904 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3907 warn $@ if $@; # just to be sure - should not happen
3913 sub generate_tap_layer2filter {
3914 my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter) = @_;
3915 my $options = $vmfw_conf->{options};
3917 my $tapchain = $iface."-OUT";
3919 # ebtables remove zeros from mac pairs
3920 $macaddr =~ s/0([0-9a-f])/$1/ig;
3921 $macaddr = lc($macaddr);
3923 ruleset_create_chain($ruleset, $tapchain);
3925 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
3926 ruleset_addrule($ruleset, $tapchain, "-s ! $macaddr", '-j DROP
');
3930 my $arpchain = $tapchain."-ARP";
3931 ruleset_addrule($ruleset, $tapchain, "-p ARP", "-j $arpchain");
3932 ruleset_create_chain($ruleset, $arpchain);
3934 foreach my $ip (@{$arpfilter}) {
3935 ruleset_addrule($ruleset, $arpchain, "-p ARP --arp-ip-src $ip", '-j RETURN
');
3937 ruleset_addrule($ruleset, $arpchain, '', '-j DROP
');
3940 if (defined($options->{layer2_protocols})){
3941 my $protochain = $tapchain."-PROTO";
3942 ruleset_addrule($ruleset, $tapchain, '', "-j $protochain");
3943 ruleset_create_chain($ruleset, $protochain);
3945 foreach my $proto (split(/,/, $options->{layer2_protocols})) {
3946 ruleset_addrule($ruleset, $protochain, "-p $proto", '-j RETURN
');
3948 ruleset_addrule($ruleset, $protochain, '', '-j DROP
');
3951 ruleset_addrule($ruleset, $tapchain, '', '-j ACCEPT
');
3953 ruleset_addrule($ruleset, 'PVEFW-FWBR-OUT
', "-i $iface", "-j $tapchain");
3956 # the parameter $change_only_regex changes two things if defined:
3957 # * all chains not matching it will be left intact
3958 # * both the $active_chains hash and the returned status_hash have different
3959 # structure (they contain a key named 'rules
').
3960 sub get_ruleset_status {
3961 my ($ruleset, $active_chains, $digest_fn, $change_only_regex) = @_;
3963 my $statushash = {};
3965 foreach my $chain (sort keys %$ruleset) {
3966 my $rules = $ruleset->{$chain};
3967 my $sig = &$digest_fn($rules);
3970 $statushash->{$chain}->{sig} = $sig;
3971 if (defined($change_only_regex)) {
3972 $oldsig = $active_chains->{$chain}->{sig};
3973 $statushash->{$chain}->{rules} = $rules;
3975 $oldsig = $active_chains->{$chain};
3977 if (!defined($oldsig)) {
3978 $statushash->{$chain}->{action} = 'create
';
3980 if ($oldsig eq $sig) {
3981 $statushash->{$chain}->{action} = 'exists';
3983 $statushash->{$chain}->{action} = 'update
';
3987 print "$statushash->{$chain}->{action} $chain ($sig)\n";
3988 foreach my $cmd (@{$rules}) {
3994 foreach my $chain (sort keys %$active_chains) {
3995 next if defined($ruleset->{$chain});
3996 my $action = 'delete';
3997 my $sig = $active_chains->{$chain};
3998 if (defined($change_only_regex)) {
3999 $action = 'ignore
' if ($chain !~ m/$change_only_regex/);
4000 $statushash->{$chain}->{rules} = $active_chains->{$chain}->{rules};
4003 $statushash->{$chain}->{action} = $action;
4004 $statushash->{$chain}->{sig} = $sig;
4005 print "$action $chain ($sig)\n" if $verbose;
4011 sub print_sig_rule {
4012 my ($chain, $sig) = @_;
4014 # We just use this to store a SHA1 checksum used to detect changes
4015 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
4018 sub get_ruleset_cmdlist {
4019 my ($ruleset, $iptablescmd, $table) = @_;
4021 $table = 'filter
' if !$table;
4023 my $cmdlist = "*$table\n"; # we pass this to iptables-restore;
4025 my ($active_chains, $hooks) = iptables_get_chains($iptablescmd, $table);
4026 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
4028 # create missing chains first
4029 foreach my $chain (sort keys %$ruleset) {
4030 my $stat = $statushash->{$chain};
4031 die "internal error" if !$stat;
4032 next if $stat->{action} ne 'create
';
4034 $cmdlist .= ":$chain - [0:0]\n";
4037 foreach my $h (qw(INPUT OUTPUT FORWARD PREROUTING)) {
4038 my $chain = "PVEFW-$h";
4039 if ($ruleset->{$chain} && !$hooks->{$h}) {
4040 $cmdlist .= "-A $h -j $chain\n";
4044 foreach my $chain (sort keys %$ruleset) {
4045 my $stat = $statushash->{$chain};
4046 die "internal error" if !$stat;
4048 if ($stat->{action
} eq 'update' || $stat->{action
} eq 'create') {
4049 $cmdlist .= "-F $chain\n";
4050 foreach my $cmd (@{$ruleset->{$chain}}) {
4051 $cmdlist .= "$cmd\n";
4053 $cmdlist .= print_sig_rule
($chain, $stat->{sig
});
4054 } elsif ($stat->{action
} eq 'delete') {
4055 die "internal error"; # this should not happen
4056 } elsif ($stat->{action
} eq 'exists') {
4059 die "internal error - unknown status '$stat->{action}'";
4063 foreach my $chain (keys %$statushash) {
4064 next if $statushash->{$chain}->{action
} ne 'delete';
4065 $cmdlist .= "-F $chain\n";
4067 foreach my $chain (keys %$statushash) {
4068 next if $statushash->{$chain}->{action
} ne 'delete';
4069 next if $chain eq 'PVEFW-INPUT';
4070 next if $chain eq 'PVEFW-OUTPUT';
4071 next if $chain eq 'PVEFW-FORWARD';
4072 next if $chain eq 'PVEFW-PREROUTING';
4073 $cmdlist .= "-X $chain\n";
4076 my $changes = $cmdlist ne "*$table\n" ?
1 : 0;
4078 $cmdlist .= "COMMIT\n";
4080 return wantarray ?
($cmdlist, $changes) : $cmdlist;
4083 my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tap|veth)\d+i\d+-(?:IN|OUT)/;
4085 sub get_ebtables_cmdlist
{
4089 my $cmdlist = "*filter\n";
4091 my $active_chains = ebtables_get_chains
();
4092 my $statushash = get_ruleset_status
($ruleset, $active_chains,
4093 \
&iptables_chain_digest
,
4094 $pve_ebtables_chainname_regex);
4096 # create chains first and make sure PVE rules are evaluated if active
4097 my $append_pve_to_forward = '-A FORWARD -j PVEFW-FORWARD';
4098 my $pve_include = 0;
4099 foreach my $chain (sort keys %$statushash) {
4100 next if ($statushash->{$chain}->{action
} eq 'delete');
4101 $cmdlist .= ":$chain ACCEPT\n";
4102 $pve_include = 1 if ($chain eq 'PVEFW-FORWARD');
4105 foreach my $chain (sort keys %$statushash) {
4106 my $stat = $statushash->{$chain};
4107 $changes = 1 if ($stat->{action
} !~ 'ignore|exists');
4108 next if ($stat->{action
} eq 'delete');
4110 foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
4111 if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
4112 next if ! $pve_include;
4115 $cmdlist .= "$cmd\n";
4118 $cmdlist .= "$append_pve_to_forward\n" if $pve_include;
4120 return wantarray ?
($cmdlist, $changes) : $cmdlist;
4123 sub get_ipset_cmdlist
{
4128 my $delete_cmdlist = "";
4130 my $active_chains = ipset_get_chains
();
4131 my $statushash = get_ruleset_status
($ruleset, $active_chains, \
&ipset_chain_digest
);
4133 # remove stale _swap chains
4134 foreach my $chain (keys %$active_chains) {
4135 if ($chain =~ m/^PVEFW-\S+_swap$/) {
4136 $cmdlist .= "destroy $chain\n";
4140 foreach my $chain (keys %$ruleset) {
4141 my $stat = $statushash->{$chain};
4142 die "internal error" if !$stat;
4144 if ($stat->{action
} eq 'create') {
4145 foreach my $cmd (@{$ruleset->{$chain}}) {
4146 $cmdlist .= "$cmd\n";
4151 foreach my $chain (keys %$ruleset) {
4152 my $stat = $statushash->{$chain};
4153 die "internal error" if !$stat;
4155 if ($stat->{action
} eq 'update') {
4156 my $chain_swap = $chain."_swap";
4158 foreach my $cmd (@{$ruleset->{$chain}}) {
4159 $cmd =~ s/$chain/$chain_swap/;
4160 $cmdlist .= "$cmd\n";
4162 $cmdlist .= "swap $chain_swap $chain\n";
4163 $cmdlist .= "flush $chain_swap\n";
4164 $cmdlist .= "destroy $chain_swap\n";
4168 # the remove unused chains
4169 foreach my $chain (keys %$statushash) {
4170 next if $statushash->{$chain}->{action
} ne 'delete';
4172 $delete_cmdlist .= "flush $chain\n";
4173 $delete_cmdlist .= "destroy $chain\n";
4176 my $changes = ($cmdlist || $delete_cmdlist) ?
1 : 0;
4178 return ($cmdlist, $delete_cmdlist, $changes);
4182 my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = @_;
4184 enable_bridge_firewall
();
4186 my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
4187 get_ipset_cmdlist
($ipset_ruleset);
4189 my ($cmdlist, $changes) = get_ruleset_cmdlist
($ruleset->{filter
});
4190 my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist
($rulesetv6->{filter
}, "ip6tables");
4191 my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist
($ebtables_ruleset);
4192 my ($cmdlist_raw, $changes_raw) = get_ruleset_cmdlist
($ruleset->{raw
}, undef, 'raw');
4193 my ($cmdlistv6_raw, $changesv6_raw) = get_ruleset_cmdlist
($rulesetv6->{raw
}, "ip6tables", 'raw');
4196 if ($ipset_changes) {
4197 print "ipset changes:\n";
4198 print $ipset_create_cmdlist if $ipset_create_cmdlist;
4199 print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
4203 print "iptables changes:\n";
4208 print "ip6tables changes:\n";
4213 print "iptables table raw changes:\n";
4217 if ($changesv6_raw) {
4218 print "ip6tables table raw changes:\n";
4219 print $cmdlistv6_raw;
4222 if ($ebtables_changes) {
4223 print "ebtables changes:\n";
4224 print $ebtables_cmdlist;
4228 my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
4229 PVE
::Tools
::file_set_contents
($tmpfile, $ipset_create_cmdlist || '');
4231 ipset_restore_cmdlist
($ipset_create_cmdlist);
4233 $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
4234 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlist || '');
4236 iptables_restore_cmdlist
($cmdlist);
4238 $tmpfile = "$pve_fw_status_dir/ip4cmdlistraw";
4239 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlist_raw || '');
4241 iptables_restore_cmdlist
($cmdlist_raw, 'raw');
4243 $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
4244 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlistv6 || '');
4246 ip6tables_restore_cmdlist
($cmdlistv6);
4248 $tmpfile = "$pve_fw_status_dir/ip6cmdlistraw";
4249 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlistv6_raw || '');
4251 ip6tables_restore_cmdlist
($cmdlistv6_raw, 'raw');
4253 $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
4254 PVE
::Tools
::file_set_contents
($tmpfile, $ipset_delete_cmdlist || '');
4256 ipset_restore_cmdlist
($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
4258 ebtables_restore_cmdlist
($ebtables_cmdlist);
4260 $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
4261 PVE
::Tools
::file_set_contents
($tmpfile, $ebtables_cmdlist || '');
4263 # test: re-read status and check if everything is up to date
4264 my $ruleset_filter = $ruleset->{filter
};
4265 my $active_chains = iptables_get_chains
();
4266 my $statushash = get_ruleset_status
($ruleset_filter, $active_chains, \
&iptables_chain_digest
);
4269 foreach my $chain (sort keys %$ruleset_filter) {
4270 my $stat = $statushash->{$chain};
4271 if ($stat->{action
} ne 'exists') {
4272 warn "unable to update chain '$chain'\n";
4277 my $rulesetv6_filter = $rulesetv6->{filter
};
4278 my $active_chainsv6 = iptables_get_chains
("ip6tables");
4279 my $statushashv6 = get_ruleset_status
($rulesetv6_filter, $active_chainsv6, \
&iptables_chain_digest
);
4281 foreach my $chain (sort keys %$rulesetv6_filter) {
4282 my $stat = $statushashv6->{$chain};
4283 if ($stat->{action
} ne 'exists') {
4284 warn "unable to update chain '$chain'\n";
4289 my $ruleset_raw = $ruleset->{raw
};
4290 my $active_chains_raw = iptables_get_chains
(undef, 'raw');
4291 my $statushash_raw = get_ruleset_status
($ruleset_raw, $active_chains_raw, \
&iptables_chain_digest
);
4293 foreach my $chain (sort keys %$ruleset_raw) {
4294 my $stat = $statushash_raw->{$chain};
4295 if ($stat->{action
} ne 'exists') {
4296 warn "unable to update chain '$chain'\n";
4301 my $rulesetv6_raw = $rulesetv6->{raw
};
4302 my $active_chainsv6_raw = iptables_get_chains
("ip6tables", 'raw');
4303 my $statushashv6_raw = get_ruleset_status
($rulesetv6_raw, $active_chainsv6_raw, \
&iptables_chain_digest
);
4305 foreach my $chain (sort keys %$rulesetv6_raw) {
4306 my $stat = $statushashv6_raw->{$chain};
4307 if ($stat->{action
} ne 'exists') {
4308 warn "unable to update chain '$chain'\n";
4313 my $active_ebtables_chains = ebtables_get_chains
();
4314 my $ebtables_statushash = get_ruleset_status
($ebtables_ruleset,
4315 $active_ebtables_chains, \
&iptables_chain_digest
,
4316 $pve_ebtables_chainname_regex);
4318 foreach my $chain (sort keys %$ebtables_ruleset) {
4319 my $stat = $ebtables_statushash->{$chain};
4320 if ($stat->{action
} ne 'exists') {
4321 warn "ebtables : unable to update chain '$chain'\n";
4326 die "unable to apply firewall changes\n" if $errors;
4328 update_nf_conntrack_max
($hostfw_conf);
4330 update_nf_conntrack_tcp_timeout_established
($hostfw_conf);
4332 update_nf_conntrack_tcp_timeout_syn_recv
($hostfw_conf);
4334 update_nf_conntrack_logging
($hostfw_conf);
4337 sub update_nf_conntrack_max
{
4338 my ($hostfw_conf) = @_;
4340 my $max = 262144; # reasonable default (2^16 * 4), see nf_conntrack-sysctl docs
4342 my $options = $hostfw_conf->{options
} || {};
4344 if (defined($options->{nf_conntrack_max
}) && ($options->{nf_conntrack_max
} > $max)) {
4345 $max = $options->{nf_conntrack_max
};
4346 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
4349 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
4350 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
4352 my $current = int(PVE
::Tools
::file_read_firstline
($filename_nf_conntrack_max) || $max);
4354 if ($current != $max) {
4355 my $hashsize = int($max/4);
4356 PVE
::ProcFSTools
::write_proc_entry
($filename_hashsize, $hashsize);
4357 PVE
::ProcFSTools
::write_proc_entry
($filename_nf_conntrack_max, $max);
4361 sub update_nf_conntrack_tcp_timeout_established
{
4362 my ($hostfw_conf) = @_;
4364 my $options = $hostfw_conf->{options
} || {};
4366 my $value = defined($options->{nf_conntrack_tcp_timeout_established
}) ?
$options->{nf_conntrack_tcp_timeout_established
} : 432000;
4368 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
4371 sub update_nf_conntrack_tcp_timeout_syn_recv
{
4372 my ($hostfw_conf) = @_;
4374 my $options = $hostfw_conf->{options
} || {};
4376 my $value = defined($options->{nf_conntrack_tcp_timeout_syn_recv
}) ?
$options->{nf_conntrack_tcp_timeout_syn_recev
} : 60;
4378 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_syn_recv", $value);
4381 my $log_nf_conntrack_enabled = undef;
4382 sub update_nf_conntrack_logging
{
4383 my ($hostfw_conf) = @_;
4385 my $options = $hostfw_conf->{options
} || {};
4386 my $value = $options->{log_nf_conntrack
} || 0;
4387 if (!defined($log_nf_conntrack_enabled)
4388 || $value != $log_nf_conntrack_enabled)
4390 my $tmpfile = "$pve_fw_status_dir/log_nf_conntrack";
4391 PVE
::Tools
::file_set_contents
($tmpfile, $value);
4393 run_command
([qw(systemctl try-reload-or-restart pvefw-logger.service)]);
4394 $log_nf_conntrack_enabled = $value;
4398 sub remove_pvefw_chains
{
4400 PVE
::Firewall
::remove_pvefw_chains_iptables
("iptables");
4401 PVE
::Firewall
::remove_pvefw_chains_iptables
("ip6tables");
4402 PVE
::Firewall
::remove_pvefw_chains_iptables
("iptables", "raw");
4403 PVE
::Firewall
::remove_pvefw_chains_iptables
("ip6tables", "raw");
4404 PVE
::Firewall
::remove_pvefw_chains_ipset
();
4405 PVE
::Firewall
::remove_pvefw_chains_ebtables
();
4409 sub remove_pvefw_chains_iptables
{
4410 my ($iptablescmd, $table) = @_;
4412 $table = 'filter' if !$table;
4414 my ($chash, $hooks) = iptables_get_chains
($iptablescmd, $table);
4415 my $cmdlist = "*$table\n";
4417 foreach my $h (qw(INPUT OUTPUT FORWARD PREROUTING)) {
4419 $cmdlist .= "-D $h -j PVEFW-$h\n";
4423 foreach my $chain (keys %$chash) {
4424 $cmdlist .= "-F $chain\n";
4427 foreach my $chain (keys %$chash) {
4428 $cmdlist .= "-X $chain\n";
4430 $cmdlist .= "COMMIT\n";
4432 if($iptablescmd eq "ip6tables") {
4433 ip6tables_restore_cmdlist
($cmdlist, $table);
4435 iptables_restore_cmdlist
($cmdlist, $table);
4439 sub remove_pvefw_chains_ipset
{
4441 my $ipset_chains = ipset_get_chains
();
4445 foreach my $chain (keys %$ipset_chains) {
4446 $cmdlist .= "flush $chain\n";
4447 $cmdlist .= "destroy $chain\n";
4450 ipset_restore_cmdlist
($cmdlist) if $cmdlist;
4453 sub remove_pvefw_chains_ebtables
{
4454 # apply empty ruleset = remove all our chains
4455 ebtables_restore_cmdlist
(get_ebtables_cmdlist
({}));
4459 my $cluster_conf = load_clusterfw_conf
();
4460 my $cluster_options = $cluster_conf->{options
};
4461 my $enable = $cluster_options->{enable
};
4465 # load required modules here
4471 my $cluster_conf = load_clusterfw_conf
();
4472 my $cluster_options = $cluster_conf->{options
};
4474 if (!$cluster_options->{enable
}) {
4475 PVE
::Firewall
::remove_pvefw_chains
();
4479 my $hostfw_conf = load_hostfw_conf
($cluster_conf);
4481 my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile
($cluster_conf, $hostfw_conf);
4483 apply_ruleset
($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);