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 Daemons)",
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 key server 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' },
398 "Proxmox Mail Gateway web interface",
399 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '8006' },
403 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '110' },
406 "Encrypted POP3 traffic",
407 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '995' },
410 "Point-to-Point Tunneling Protocol",
411 { action
=> 'PARAM', proto
=> '47' },
412 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1723' },
416 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
420 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5432' },
423 "Line Printer protocol printing",
424 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '515' },
427 "Microsoft Remote Desktop Protocol traffic",
428 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3389' },
431 "Routing Information Protocol (bidirectional)",
432 { action
=> 'PARAM', proto
=> 'udp', dport
=> '520' },
435 "BIND remote management protocol",
436 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '953' },
439 "Razor Antispam System",
440 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2703' },
443 "Remote time retrieval (rdate)",
444 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
448 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '873' },
451 "SANE network scanning",
452 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6566' },
455 "Microsoft SMB traffic",
456 { action
=> 'PARAM', proto
=> 'udp', dport
=> '135,445' },
457 { action
=> 'PARAM', proto
=> 'udp', dport
=> '137:139' },
458 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
459 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '135,139,445' },
462 "Samba Web Administration Tool",
463 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '901' },
466 "Simple Mail Transfer Protocol",
467 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
470 "Encrypted Simple Mail Transfer Protocol",
471 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
474 "Simple Network Management Protocol",
475 { action
=> 'PARAM', proto
=> 'udp', dport
=> '161:162' },
476 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '161' },
479 "Spam Assassin SPAMD traffic",
480 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '783' },
483 "Secure shell traffic",
484 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '22' },
487 "Subversion server (svnserve)",
488 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3690' },
491 "SixXS IPv6 Deployment and Tunnel Broker",
492 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3874' },
493 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3740' },
494 { action
=> 'PARAM', proto
=> '41' },
495 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5072,8374' },
498 "Squid web proxy traffic",
499 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3128' },
502 "Mail message submission traffic",
503 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
506 "Syslog protocol (RFC 5424) traffic",
507 { action
=> 'PARAM', proto
=> 'udp', dport
=> '514' },
508 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '514' },
511 "Trivial File Transfer Protocol traffic",
512 { action
=> 'PARAM', proto
=> 'udp', dport
=> '69' },
516 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '23' },
520 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '992' },
523 "RFC 868 Time protocol",
524 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
527 "Traceroute (for up to 30 hops) traffic",
528 { action
=> 'PARAM', proto
=> 'udp', dport
=> '33434:33524' },
529 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
532 "VNC traffic for VNC display's 0 - 99",
533 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5900:5999' },
536 "VNC traffic from Vncservers to Vncviewers in listen mode",
537 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5500' },
540 "WWW traffic (HTTP and HTTPS)",
541 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
542 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
545 "Web Cache/Proxy traffic (port 8080)",
546 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '8080' },
550 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10000' },
553 "Whois (nicname, RFC 3912) traffic",
554 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '43' },
558 my $pve_fw_parsed_macros;
559 my $pve_fw_macro_descr;
560 my $pve_fw_macro_ipversion = {};
561 my $pve_fw_preferred_macro_names = {};
563 my $FWACCEPTMARK_ON = "0x80000000/0x80000000";
564 my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
566 my $pve_std_chains = {};
567 my $pve_std_chains_conf = {};
568 $pve_std_chains_conf->{4} = {
569 'PVEFW-SET-ACCEPT-MARK' => [
570 { target
=> "-j MARK --set-mark $FWACCEPTMARK_ON" },
572 'PVEFW-DropBroadcast' => [
573 # same as shorewall 'Broadcast'
574 # simply DROP BROADCAST/MULTICAST/ANYCAST
575 # we can use this to reduce logging
576 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
577 { action
=> 'DROP', dsttype
=> 'MULTICAST' },
578 { action
=> 'DROP', dsttype
=> 'ANYCAST' },
579 { action
=> 'DROP', dest
=> '224.0.0.0/4' },
582 # same as shorewall 'reject'
583 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
584 { action
=> 'DROP', source
=> '224.0.0.0/4' },
585 { action
=> 'DROP', proto
=> 'icmp' },
586 { match
=> '-p tcp', target
=> '-j REJECT --reject-with tcp-reset' },
587 { match
=> '-p udp', target
=> '-j REJECT --reject-with icmp-port-unreachable' },
588 { match
=> '-p icmp', target
=> '-j REJECT --reject-with icmp-host-unreachable' },
589 { target
=> '-j REJECT --reject-with icmp-host-prohibited' },
592 # same as shorewall 'Drop', which is equal to DROP,
593 # but REJECT/DROP some packages to reduce logging,
594 # and ACCEPT critical ICMP types
595 # we are not interested in BROADCAST/MULTICAST/ANYCAST
596 { action
=> 'PVEFW-DropBroadcast' },
597 # ACCEPT critical ICMP types
598 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
599 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
600 # Drop packets with INVALID state
601 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
602 # Drop Microsoft SMB noise
603 { action
=> 'DROP', proto
=> 'udp', dport
=> '135,445' },
604 { action
=> 'DROP', proto
=> 'udp', dport
=> '137:139' },
605 { action
=> 'DROP', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
606 { action
=> 'DROP', proto
=> 'tcp', dport
=> '135,139,445' },
607 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
608 # Drop new/NotSyn traffic so that it doesn't get logged
609 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
611 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
614 # same as shorewall 'Reject', which is equal to Reject,
615 # but REJECT/DROP some packages to reduce logging,
616 # and ACCEPT critical ICMP types
617 # we are not interested in BROADCAST/MULTICAST/ANYCAST
618 { action
=> 'PVEFW-DropBroadcast' },
619 # ACCEPT critical ICMP types
620 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
621 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
622 # Drop packets with INVALID state
623 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
624 # Drop Microsoft SMB noise
625 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '135,445' },
626 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '137:139'},
627 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
628 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '135,139,445' },
629 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
630 # Drop new/NotSyn traffic so that it doesn't get logged
631 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
633 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
635 'PVEFW-tcpflags' => [
636 # same as shorewall tcpflags action.
637 # Packets arriving on this interface are checked for some illegal combinations of TCP flags
638 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target
=> '-g PVEFW-logflags' },
639 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target
=> '-g PVEFW-logflags' },
640 { match
=> '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target
=> '-g PVEFW-logflags' },
641 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target
=> '-g PVEFW-logflags' },
642 { match
=> '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target
=> '-g PVEFW-logflags' },
645 # same as shorewall smurfs action
646 # Filter packets for smurfs (packets with a broadcast address as the source).
647 { match
=> '-s 0.0.0.0/32', target
=> '-j RETURN' }, # allow DHCP
648 { match
=> '-m addrtype --src-type BROADCAST', target
=> '-g PVEFW-smurflog' },
649 { match
=> '-s 224.0.0.0/4', target
=> '-g PVEFW-smurflog' },
651 'PVEFW-smurflog' => [
652 { action
=> 'DROP', logmsg
=> 'DROP: ' },
654 'PVEFW-logflags' => [
655 { action
=> 'DROP', logmsg
=> 'DROP: ' },
659 $pve_std_chains_conf->{6} = {
660 'PVEFW-SET-ACCEPT-MARK' => [
661 { target
=> "-j MARK --set-mark $FWACCEPTMARK_ON" },
663 'PVEFW-DropBroadcast' => [
664 # same as shorewall 'Broadcast'
665 # simply DROP BROADCAST/MULTICAST/ANYCAST
666 # we can use this to reduce logging
667 #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
668 # ipv6 addrtype does not work with kernel 2.6.32
669 #{ action => 'DROP', dsttype => 'MULTICAST' },
670 #{ action => 'DROP', dsttype => 'ANYCAST' },
671 { action
=> 'DROP', dest
=> 'ff00::/8' },
672 #{ action => 'DROP', dest => '224.0.0.0/4' },
675 { action
=> 'DROP', proto
=> 'icmpv6' },
676 { match
=> '-p tcp', target
=> '-j REJECT --reject-with tcp-reset' },
677 { match
=> '-p udp', target
=> '-j REJECT --reject-with icmp6-port-unreachable' },
678 { target
=> '-j REJECT --reject-with icmp6-adm-prohibited' },
681 # same as shorewall 'Drop', which is equal to DROP,
682 # but REJECT/DROP some packages to reduce logging,
683 # and ACCEPT critical ICMP types
684 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
685 # we are not interested in BROADCAST/MULTICAST/ANYCAST
686 { action
=> 'PVEFW-DropBroadcast' },
687 # ACCEPT critical ICMP types
688 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'destination-unreachable' },
689 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'time-exceeded' },
690 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'packet-too-big' },
691 # Drop packets with INVALID state
692 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
693 # Drop Microsoft SMB noise
694 { action
=> 'DROP', proto
=> 'udp', dport
=> '135,445' },
695 { action
=> 'DROP', proto
=> 'udp', dport
=> '137:139'},
696 { action
=> 'DROP', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
697 { action
=> 'DROP', proto
=> 'tcp', dport
=> '135,139,445' },
698 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
699 # Drop new/NotSyn traffic so that it doesn't get logged
700 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
702 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
705 # same as shorewall 'Reject', which is equal to Reject,
706 # but REJECT/DROP some packages to reduce logging,
707 # and ACCEPT critical ICMP types
708 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
709 # we are not interested in BROADCAST/MULTICAST/ANYCAST
710 { action
=> 'PVEFW-DropBroadcast' },
711 # ACCEPT critical ICMP types
712 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'destination-unreachable' },
713 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'time-exceeded' },
714 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'packet-too-big' },
715 # Drop packets with INVALID state
716 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
717 # Drop Microsoft SMB noise
718 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '135,445' },
719 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '137:139' },
720 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
721 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '135,139,445' },
722 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
723 # Drop new/NotSyn traffic so that it doesn't get logged
724 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
726 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
728 'PVEFW-tcpflags' => [
729 # same as shorewall tcpflags action.
730 # Packets arriving on this interface are checked for some illegal combinations of TCP flags
731 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target
=> '-g PVEFW-logflags' },
732 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target
=> '-g PVEFW-logflags' },
733 { match
=> '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target
=> '-g PVEFW-logflags' },
734 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target
=> '-g PVEFW-logflags' },
735 { match
=> '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target
=> '-g PVEFW-logflags' },
737 'PVEFW-logflags' => [
738 { action
=> 'DROP', logmsg
=> 'DROP: ' },
742 # iptables -p icmp -h
743 my $icmp_type_names = {
746 'destination-unreachable' => 1,
747 'network-unreachable' => 1,
748 'host-unreachable' => 1,
749 'protocol-unreachable' => 1,
750 'port-unreachable' => 1,
751 'fragmentation-needed' => 1,
752 'source-route-failed' => 1,
753 'network-unknown' => 1,
755 'network-prohibited' => 1,
756 'host-prohibited' => 1,
757 'TOS-network-unreachable' => 1,
758 'TOS-host-unreachable' => 1,
759 'communication-prohibited' => 1,
760 'host-precedence-violation' => 1,
761 'precedence-cutoff' => 1,
762 'source-quench' => 1,
764 'network-redirect' => 1,
765 'host-redirect' => 1,
766 'TOS-network-redirect' => 1,
767 'TOS-host-redirect' => 1,
769 'router-advertisement' => 1,
770 'router-solicitation' => 1,
771 'time-exceeded' => 1,
772 'ttl-zero-during-transit' => 1,
773 'ttl-zero-during-reassembly' => 1,
774 'parameter-problem' => 1,
775 'ip-header-bad' => 1,
776 'required-option-missing' => 1,
777 'timestamp-request' => 1,
778 'timestamp-reply' => 1,
779 'address-mask-request' => 1,
780 'address-mask-reply' => 1,
783 # ip6tables -p icmpv6 -h
785 my $icmpv6_type_names = {
786 'destination-unreachable' => 1,
788 'communication-prohibited' => 1,
790 'address-unreachable' => 1,
791 'port-unreachable' => 1,
792 'failed-policy' => 1,
794 'packet-too-big' => 1,
795 'time-exceeded' => 1,
796 'ttl-zero-during-transit' => 1,
797 'ttl-zero-during-reassembly' => 1,
798 'parameter-problem' => 1,
800 'unknown-header-type' => 1,
801 'unknown-option' => 1,
804 'router-solicitation' => 1,
805 'router-advertisement' => 1,
806 'neighbor-solicitation' => 1,
807 'neighbour-solicitation' => 1,
808 'neighbor-advertisement' => 1,
809 'neighbour-advertisement' => 1,
813 my $is_valid_icmp_type = sub {
814 my ($type, $valid_types) = @_;
816 if ($type =~ m/^\d+$/) {
817 # values for icmp-type range between 0 and 255 (8 bit field)
818 die "invalid icmp-type '$type'\n" if $type > 255;
820 die "unknown icmp-type '$type'\n" if !defined($valid_types->{$type});
824 sub init_firewall_macros
{
826 $pve_fw_parsed_macros = {};
829 my ($k, $macro) = @_;
830 my $lc_name = lc($k);
831 $pve_fw_macro_ipversion->{$k} = 0;
832 while (!ref($macro->[0])) {
833 my $desc = shift @$macro;
834 if ($desc eq 'ipv4only') {
835 $pve_fw_macro_ipversion->{$k} = 4;
836 } elsif ($desc eq 'ipv6only') {
837 $pve_fw_macro_ipversion->{$k} = 6;
839 $pve_fw_macro_descr->{$k} = $desc;
842 $pve_fw_preferred_macro_names->{$lc_name} = $k;
843 $pve_fw_parsed_macros->{$k} = $macro;
846 foreach my $k (keys %$pve_fw_macros) {
847 &$parse($k, $pve_fw_macros->{$k});
850 foreach my $k (keys %$pve_ipv6fw_macros) {
851 next if $pve_fw_parsed_macros->{$k};
852 &$parse($k, $pve_ipv6fw_macros->{$k});
853 $pve_fw_macro_ipversion->{$k} = 6;
857 init_firewall_macros
();
860 return wantarray ?
($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
865 sub get_etc_services
{
867 return $etc_services if $etc_services;
869 my $filename = "/etc/services";
871 my $fh = IO
::File-
>new($filename, O_RDONLY
);
873 warn "unable to read '$filename' - $!\n";
879 while (my $line = <$fh>) {
881 next if $line =~m/^#/;
882 next if ($line =~m/^\s*$/);
884 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp|sctp).*$!) {
885 $services->{byid
}->{$2}->{name
} = $1;
886 $services->{byid
}->{$2}->{port
} = $2;
887 $services->{byid
}->{$2}->{$3} = 1;
888 $services->{byname
}->{$1} = $services->{byid
}->{$2};
894 $etc_services = $services;
897 return $etc_services;
900 sub parse_protocol_file
{
903 my $fh = IO
::File-
>new($filename, O_RDONLY
);
905 warn "unable to read '$filename' - $!\n";
911 while (my $line = <$fh>) {
913 next if $line =~m/^#/;
914 next if ($line =~m/^\s*$/);
916 if ($line =~ m!^(\S+)\s+(\d+)(?:\s+.*)?$!) {
917 $protocols->{byid
}->{$2}->{name
} = $1;
918 $protocols->{byname
}->{$1} = $protocols->{byid
}->{$2};
929 sub get_etc_protocols
{
930 return $etc_protocols if $etc_protocols;
932 my $protocols = parse_protocol_file
('/etc/protocols');
934 # add special case for ICMP v6
935 $protocols->{byid
}->{icmpv6
}->{name
} = "icmpv6";
936 $protocols->{byname
}->{icmpv6
} = $protocols->{byid
}->{icmpv6
};
938 $etc_protocols = $protocols;
940 return $etc_protocols;
945 sub get_etc_ethertypes
{
946 $etc_ethertypes = parse_protocol_file
('/etc/ethertypes')
948 return $etc_ethertypes;
954 my ($new_value) = @_;
956 $__local_network = $new_value if defined($new_value);
958 return $__local_network if defined($__local_network);
961 my $nodename = PVE
::INotify
::nodename
();
963 my $ip = PVE
::Cluster
::remote_node_ip
($nodename);
965 my $testip = Net
::IP-
>new($ip);
967 my $isv6 = $testip->version == 6;
968 my $routes = $isv6 ? PVE
::ProcFSTools
::read_proc_net_ipv6_route
()
969 : PVE
::ProcFSTools
::read_proc_net_route
();
970 foreach my $entry (@$routes) {
973 $mask = $entry->{prefix
};
974 next if !$mask; # skip the default route...
976 $mask = $PVE::Network
::ipv4_mask_hash_localnet-
>{$entry->{mask
}};
977 next if !defined($mask);
979 my $cidr = "$entry->{dest}/$mask";
980 my $testnet = Net
::IP-
>new($cidr);
981 my $overlap = $testnet->overlaps($testip);
982 if ($overlap == $Net::IP
::IP_B_IN_A_OVERLAP
||
983 $overlap == $Net::IP
::IP_IDENTICAL
)
985 $__local_network = $cidr;
992 return $__local_network;
995 # ipset names are limited to 31 characters,
996 # and we use '-v4' or '-v6' to indicate IP versions,
997 # and we use '_swap' suffix for atomic update,
998 # for example PVEFW-${VMID}-${ipset_name}_swap
1000 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
1002 sub compute_ipset_chain_name
{
1003 my ($vmid, $ipset_name, $ipversion) = @_;
1005 $vmid = 0 if !defined($vmid);
1007 my $id = "$vmid-${ipset_name}-v$ipversion";
1009 if (length($id) > $max_iptables_ipset_name_length) {
1010 $id = PVE
::Tools
::fnv31a_hex
($id);
1016 sub compute_ipfilter_ipset_name
{
1019 return "ipfilter-$iface";
1022 sub parse_address_list
{
1025 if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
1026 die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
1030 if ($str =~ m/^${ip_alias_pattern}$/) {
1031 die "alias name too long\n" if length($str) > $max_alias_name_length;
1039 my @elements = split(/,/, $str);
1040 die "extraneous commas in list\n" if $str ne join(',', @elements);
1041 foreach my $elem (@elements) {
1043 my $ip = Net
::IP-
>new($elem);
1045 my $err = Net
::IP
::Error
();
1046 die "invalid IP address: $err\n";
1048 $iprange = 1 if $elem =~ m/-/;
1050 my $new_ipversion = Net
::IP
::ip_is_ipv6
($ip->ip()) ?
6 : 4;
1052 die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
1053 if $ipversion && ($new_ipversion != $ipversion);
1055 $ipversion = $new_ipversion;
1058 die "you can't use a range in a list\n" if $iprange && $count > 1;
1063 sub parse_port_name_number_or_range
{
1064 my ($str, $dport) = @_;
1066 my $services = PVE
::Firewall
::get_etc_services
();
1070 my @elements = split(/,/, $str);
1071 die "extraneous commas in list\n" if $str ne join(',', @elements);
1072 foreach my $item (@elements) {
1073 if ($item =~ m/^([0-9]+):([0-9]+)$/) {
1075 my ($port1, $port2) = ($1, $2);
1076 die "invalid port '$port1'\n" if $port1 > 65535;
1077 die "invalid port '$port2'\n" if $port2 > 65535;
1078 die "backwards range '$port1:$port2' not allowed, did you mean '$port2:$port1'?\n" if $port1 > $port2;
1079 } elsif ($item =~ m/^([0-9]+)$/) {
1082 die "invalid port '$port'\n" if $port > 65535;
1084 if ($dport && $icmp_type_names->{$item}) {
1086 } elsif ($dport && $icmpv6_type_names->{$item}) {
1089 die "invalid port '$item'\n" if !$services->{byname
}->{$item};
1094 die "ICMP ports not allowed in port range\n" if $icmp_port && $count > 0;
1096 # I really don't like to use the word number here, but it's the only thing
1097 # that makes sense in a literal way. The range 1:100 counts as 2, not as
1098 # one and not as 100...
1099 die "too many entries in port list (> 15 numbers)\n"
1102 return (scalar(@elements) > 1);
1105 PVE
::JSONSchema
::register_format
('pve-fw-sport-spec', \
&pve_fw_verify_sport_spec
);
1106 sub pve_fw_verify_sport_spec
{
1109 parse_port_name_number_or_range
($portstr, 0);
1114 PVE
::JSONSchema
::register_format
('pve-fw-dport-spec', \
&pve_fw_verify_dport_spec
);
1115 sub pve_fw_verify_dport_spec
{
1118 parse_port_name_number_or_range
($portstr, 1);
1123 PVE
::JSONSchema
::register_format
('pve-fw-addr-spec', \
&pve_fw_verify_addr_spec
);
1124 sub pve_fw_verify_addr_spec
{
1127 parse_address_list
($list);
1132 PVE
::JSONSchema
::register_format
('pve-fw-protocol-spec', \
&pve_fw_verify_protocol_spec
);
1133 sub pve_fw_verify_protocol_spec
{
1136 my $protocols = get_etc_protocols
();
1138 die "unknown protocol '$proto'\n" if $proto &&
1139 !(defined($protocols->{byname
}->{$proto}) ||
1140 defined($protocols->{byid
}->{$proto}));
1145 PVE
::JSONSchema
::register_format
('pve-fw-icmp-type-spec', \
&pve_fw_verify_icmp_type_spec
);
1146 sub pve_fw_verify_icmp_type_spec
{
1147 my ($icmp_type) = @_;
1149 if ($icmp_type_names->{$icmp_type} || $icmpv6_type_names->{$icmp_type}) {
1153 die "invalid icmp-type value '$icmp_type'\n" if $icmp_type ne '';
1159 # helper function for API
1161 sub copy_opject_with_digest
{
1164 my $sha = Digest
::SHA-
>new('sha1');
1167 foreach my $k (sort keys %$object) {
1168 my $v = $object->{$k};
1169 next if !defined($v);
1171 $sha->add($k, ':', $v, "\n");
1174 my $digest = $sha->hexdigest;
1176 $res->{digest
} = $digest;
1178 return wantarray ?
($res, $digest) : $res;
1181 sub copy_list_with_digest
{
1184 my $sha = Digest
::SHA-
>new('sha1');
1187 foreach my $entry (@$list) {
1189 foreach my $k (sort keys %$entry) {
1190 my $v = $entry->{$k};
1191 next if !defined($v);
1193 # Note: digest ignores refs ($rule->{errors})
1194 # since Digest::SHA expects a series of bytes,
1195 # we have to encode the value here to prevent errors when
1196 # using utf8 characters (eg. in comments)
1197 $sha->add($k, ':', encode_utf8
($v), "\n") if !ref($v); ;
1202 my $digest = $sha->hexdigest;
1204 foreach my $entry (@$res) {
1205 $entry->{digest
} = $digest;
1208 return wantarray ?
($res, $digest) : $res;
1211 our $cluster_option_properties = {
1213 description
=> "Enable or disable the firewall cluster wide.",
1219 description
=> "Enable ebtables rules cluster wide.",
1225 description
=> "Input policy.",
1228 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1231 description
=> "Output policy.",
1234 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1237 description
=> "Log ratelimiting settings",
1238 type
=> 'string', format
=> {
1241 description
=> 'Enable or disable log rate limiting',
1247 description
=> 'Frequency with which the burst bucket gets refilled',
1249 pattern
=> '[1-9][0-9]*\/(second|minute|hour|day)',
1250 format_description
=> 'rate',
1251 default => '1/second',
1257 description
=> 'Initial burst of packages which will always get logged before the rate is applied',
1265 our $host_option_properties = {
1267 description
=> "Enable host firewall rules.",
1271 log_level_in
=> get_standard_option
('pve-fw-loglevel', {
1272 description
=> "Log level for incoming traffic." }),
1273 log_level_out
=> get_standard_option
('pve-fw-loglevel', {
1274 description
=> "Log level for outgoing traffic." }),
1275 tcp_flags_log_level
=> get_standard_option
('pve-fw-loglevel', {
1276 description
=> "Log level for illegal tcp flags filter." }),
1277 smurf_log_level
=> get_standard_option
('pve-fw-loglevel', {
1278 description
=> "Log level for SMURFS filter." }),
1280 description
=> "Enable SMURFS filter.",
1285 description
=> "Filter illegal combinations of TCP flags.",
1290 nf_conntrack_max
=> {
1291 description
=> "Maximum number of tracked connections.",
1297 nf_conntrack_tcp_timeout_established
=> {
1298 description
=> "Conntrack established timeout.",
1304 nf_conntrack_tcp_timeout_syn_recv
=> {
1305 description
=> "Conntrack syn recv timeout.",
1313 description
=> "Enable NDP (Neighbor Discovery Protocol).",
1318 nf_conntrack_allow_invalid
=> {
1319 description
=> "Allow invalid packets on connection tracking.",
1324 protection_synflood
=> {
1325 description
=> "Enable synflood protection",
1330 protection_synflood_rate
=> {
1331 description
=> "Synflood protection rate syn/sec by ip src.",
1336 protection_synflood_burst
=> {
1337 description
=> "Synflood protection rate burst by ip src.",
1342 log_nf_conntrack
=> {
1343 description
=> "Enable logging of conntrack information.",
1350 our $vm_option_properties = {
1352 description
=> "Enable/disable firewall rules.",
1358 description
=> "Enable/disable MAC address filter.",
1364 description
=> "Enable DHCP.",
1370 description
=> "Enable NDP (Neighbor Discovery Protocol).",
1376 description
=> "Allow sending Router Advertisement.",
1381 description
=> "Enable default IP filters. " .
1382 "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1383 "for every interface. Such ipsets implicitly contain sane default " .
1384 "restrictions such as restricting IPv6 link local addresses to " .
1385 "the one derived from the interface's MAC address. For containers " .
1386 "the configured IP addresses will be implicitly added.",
1391 description
=> "Input policy.",
1394 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1397 description
=> "Output policy.",
1400 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1402 log_level_in
=> get_standard_option
('pve-fw-loglevel', {
1403 description
=> "Log level for incoming traffic." }),
1404 log_level_out
=> get_standard_option
('pve-fw-loglevel', {
1405 description
=> "Log level for outgoing traffic." }),
1410 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.";
1412 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.";
1414 my $rule_properties = {
1416 description
=> "Update rule at position <pos>.",
1421 digest
=> get_standard_option
('pve-config-digest'),
1423 description
=> "Rule type.",
1426 enum
=> ['in', 'out', 'group'],
1429 description
=> "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1432 pattern
=> $security_group_name_pattern,
1437 description
=> "Use predefined standard macro.",
1442 iface
=> get_standard_option
('pve-iface', {
1443 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.",
1447 description
=> "Restrict packet source address. $addr_list_descr",
1448 type
=> 'string', format
=> 'pve-fw-addr-spec',
1453 description
=> "Restrict packet destination address. $addr_list_descr",
1454 type
=> 'string', format
=> 'pve-fw-addr-spec',
1459 description
=> "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1460 type
=> 'string', format
=> 'pve-fw-protocol-spec',
1464 description
=> "Flag to enable/disable a rule.",
1469 log => get_standard_option
('pve-fw-loglevel', {
1470 description
=> "Log level for firewall rule.",
1473 description
=> "Restrict TCP/UDP source port. $port_descr",
1474 type
=> 'string', format
=> 'pve-fw-sport-spec',
1478 description
=> "Restrict TCP/UDP destination port. $port_descr",
1479 type
=> 'string', format
=> 'pve-fw-dport-spec',
1483 description
=> "Descriptive comment.",
1488 description
=> "Specify icmp-type. Only valid if proto equals 'icmp'.",
1489 type
=> 'string', format
=> 'pve-fw-icmp-type-spec',
1494 sub add_rule_properties
{
1495 my ($properties) = @_;
1497 foreach my $k (keys %$rule_properties) {
1498 my $h = $rule_properties->{$k};
1499 # copy data, so that we can modify later without side effects
1500 foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1506 sub delete_rule_properties
{
1507 my ($rule, $delete_str) = @_;
1509 foreach my $opt (PVE
::Tools
::split_list
($delete_str)) {
1510 raise_param_exc
({ 'delete' => "no such property ('$opt')"})
1511 if !defined($rule_properties->{$opt});
1512 raise_param_exc
({ 'delete' => "unable to delete required property '$opt'"})
1513 if $opt eq 'type' || $opt eq 'action';
1514 delete $rule->{$opt};
1520 my $apply_macro = sub {
1521 my ($macro_name, $param, $verify, $ipversion) = @_;
1523 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1524 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1526 if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1527 $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1530 # skip macros which are specific to another ipversion
1531 if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1532 return if $ipversion != $required;
1537 foreach my $templ (@$macro_rules) {
1539 my $param_used = {};
1540 foreach my $k (keys %$templ) {
1541 my $v = $templ->{$k};
1542 if ($v eq 'PARAM') {
1544 $param_used->{$k} = 1;
1545 } elsif ($v eq 'DEST') {
1546 $v = $param->{dest
};
1547 $param_used->{dest
} = 1;
1548 } elsif ($v eq 'SOURCE') {
1549 $v = $param->{source
};
1550 $param_used->{source
} = 1;
1554 my $msg = "missing parameter '$k' in macro '$macro_name'";
1555 raise_param_exc
({ macro => $msg }) if $verify;
1560 foreach my $k (keys %$param) {
1561 next if $k eq 'macro';
1562 next if !defined($param->{$k});
1563 next if $param_used->{$k};
1564 if (defined($rule->{$k})) {
1565 if ($rule->{$k} ne $param->{$k}) {
1566 my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1567 raise_param_exc
({ $k => $msg }) if $verify;
1571 $rule->{$k} = $param->{$k};
1574 push @$rules, $rule;
1580 my $rule_env_iface_lookup = {
1589 my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1591 my $allow_groups = $rule_env eq 'group' ?
0 : 1;
1593 my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1594 die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1596 my $errors = $rule->{errors
} || {};
1598 my $error_count = 0;
1600 my $add_error = sub {
1601 my ($param, $msg) = @_;
1603 raise_param_exc
({ $param => $msg }) if !$noerr;
1605 $errors->{$param} = $msg if !$errors->{$param};
1609 my $set_ip_version = sub {
1612 die "detected mixed ipv4/ipv6 addresses in rule\n"
1613 if $ipversion && ($vers != $ipversion);
1618 my $check_ipset_or_alias_property = sub {
1619 my ($name, $expected_ipversion) = @_;
1621 if (my $value = $rule->{$name}) {
1622 if ($value =~ m/^\+/) {
1623 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1624 &$add_error($name, "no such ipset '$1'")
1625 if !($cluster_conf->{ipset
}->{$1} || ($fw_conf && $fw_conf->{ipset
}->{$1}));
1628 &$add_error($name, "invalid ipset name '$value'");
1630 } elsif ($value =~ m/^${ip_alias_pattern}$/){
1631 my $alias = lc($value);
1632 &$add_error($name, "no such alias '$value'")
1633 if !($cluster_conf->{aliases
}->{$alias} || ($fw_conf && $fw_conf->{aliases
}->{$alias}));
1634 my $e = $fw_conf ?
$fw_conf->{aliases
}->{$alias} : undef;
1635 $e = $cluster_conf->{aliases
}->{$alias} if !$e && $cluster_conf;
1637 &$set_ip_version($e->{ipversion
});
1642 my $type = $rule->{type
};
1643 my $action = $rule->{action
};
1645 &$add_error('type', "missing property") if !$type;
1646 &$add_error('action', "missing property") if !$action;
1649 if ($type eq 'in' || $type eq 'out') {
1650 &$add_error('action', "unknown action '$action'")
1651 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1652 } elsif ($type eq 'group') {
1653 &$add_error('type', "security groups not allowed")
1655 &$add_error('action', "invalid characters in security group name")
1656 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1658 &$add_error('type', "unknown rule type '$type'");
1662 if ($rule->{iface
}) {
1663 &$add_error('type', "parameter -i not allowed for this rule type")
1665 eval { PVE
::JSONSchema
::pve_verify_iface
($rule->{iface
}); };
1666 &$add_error('iface', $@) if $@;
1667 if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1668 &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1669 if $rule->{iface
} !~ m/^net(\d+)$/;
1673 if ($rule->{macro}) {
1674 if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1675 $rule->{macro} = $preferred_name;
1677 &$add_error('macro', "unknown macro '$rule->{macro}'");
1681 if ($rule->{proto
}) {
1682 eval { pve_fw_verify_protocol_spec
($rule->{proto
}); };
1683 &$add_error('proto', $@) if $@;
1684 &$set_ip_version(4) if $rule->{proto
} eq 'icmp';
1685 &$set_ip_version(6) if $rule->{proto
} eq 'icmpv6';
1686 &$set_ip_version(6) if $rule->{proto
} eq 'ipv6-icmp';
1689 if ($rule->{dport
}) {
1690 eval { parse_port_name_number_or_range
($rule->{dport
}, 1); };
1691 &$add_error('dport', $@) if $@;
1692 my $proto = $rule->{proto
};
1693 &$add_error('proto', "missing property - 'dport' requires this property")
1695 &$add_error('dport', "protocol '$proto' does not support ports")
1696 if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1697 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1700 if (my $icmp_type = $rule ->{'icmp-type'}) {
1701 my $proto = $rule->{proto
};
1702 &$add_error('proto', "missing property - 'icmp-type' requires this property")
1703 if $proto ne 'icmp' && $proto ne 'icmpv6' && $proto ne 'ipv6-icmp';
1704 &$add_error('icmp-type', "'icmp-type' cannot be specified together with 'dport'")
1706 if ($proto eq 'icmp' && !$icmp_type_names->{$icmp_type}) {
1707 &$add_error('icmp-type', "invalid icmp-type '$icmp_type' for proto 'icmp'");
1708 } elsif (($proto eq 'icmpv6' || $proto eq 'ipv6-icmp') && !$icmpv6_type_names->{$icmp_type}) {
1709 &$add_error('icmp-type', "invalid icmp-type '$icmp_type' for proto '$proto'");
1713 if ($rule->{sport
}) {
1714 eval { parse_port_name_number_or_range
($rule->{sport
}, 0); };
1715 &$add_error('sport', $@) if $@;
1716 my $proto = $rule->{proto
};
1717 &$add_error('proto', "missing property - 'sport' requires this property")
1719 &$add_error('sport', "protocol '$proto' does not support ports")
1720 if !$PROTOCOLS_WITH_PORTS->{$proto};
1723 if ($rule->{source
}) {
1725 my $source_ipversion = parse_address_list
($rule->{source
});
1726 &$set_ip_version($source_ipversion);
1728 &$add_error('source', $@) if $@;
1729 &$check_ipset_or_alias_property('source', $ipversion);
1732 if ($rule->{dest
}) {
1734 my $dest_ipversion = parse_address_list
($rule->{dest
});
1735 &$set_ip_version($dest_ipversion);
1737 &$add_error('dest', $@) if $@;
1738 &$check_ipset_or_alias_property('dest', $ipversion);
1741 $rule->{ipversion
} = $ipversion if $ipversion;
1743 if ($rule->{macro} && !$error_count) {
1744 eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1746 if (ref($err) eq "PVE::Exception" && $err->{errors
}) {
1747 my $eh = $err->{errors
};
1748 foreach my $p (keys %$eh) {
1749 &$add_error($p, $eh->{$p});
1752 &$add_error('macro', "$err");
1757 $rule->{errors
} = $errors if $error_count;
1762 sub copy_rule_data
{
1763 my ($rule, $param) = @_;
1765 foreach my $k (keys %$rule_properties) {
1766 if (defined(my $v = $param->{$k})) {
1767 if ($v eq '' || $v eq '-') {
1778 sub rules_modify_permissions
{
1779 my ($rule_env) = @_;
1781 if ($rule_env eq 'host') {
1783 check
=> ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1785 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1787 check
=> ['perm', '/', [ 'Sys.Modify' ]],
1789 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1791 check
=> ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1798 sub rules_audit_permissions
{
1799 my ($rule_env) = @_;
1801 if ($rule_env eq 'host') {
1803 check
=> ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1805 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1807 check
=> ['perm', '/', [ 'Sys.Audit' ]],
1809 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1811 check
=> ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1820 sub enable_bridge_firewall
{
1823 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1824 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1826 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1827 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/ipv4/tcp_syncookies", "1");
1831 sub iptables_restore_cmdlist
{
1832 my ($cmdlist, $table) = @_;
1834 $table = 'filter' if !$table;
1835 run_command
(['iptables-restore', '-T', $table, '-n'], input
=> $cmdlist, errmsg
=> "iptables_restore_cmdlist");
1838 sub ip6tables_restore_cmdlist
{
1839 my ($cmdlist, $table) = @_;
1841 $table = 'filter' if !$table;
1842 run_command
(['ip6tables-restore', '-T', $table, '-n'], input
=> $cmdlist, errmsg
=> "iptables_restore_cmdlist");
1845 sub ipset_restore_cmdlist
{
1848 run_command
(['ipset', 'restore'], input
=> $cmdlist, errmsg
=> "ipset_restore_cmdlist");
1851 sub ebtables_restore_cmdlist
{
1854 run_command
(['ebtables-restore'], input
=> $cmdlist, errmsg
=> "ebtables_restore_cmdlist");
1857 sub iptables_get_chains
{
1858 my ($iptablescmd, $t) = @_;
1860 $iptablescmd = "iptables" if !$iptablescmd;
1861 $t = 'filter' if !$t;
1865 # check what chains we want to track
1866 my $is_pvefw_chain = sub {
1869 return 1 if $name =~ m/^PVEFW-\S+$/;
1871 return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1873 return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1875 return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1876 return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1888 return if $line =~ m/^#/;
1889 return if $line =~ m/^\s*$/;
1891 if ($line =~ m/^\*(\S+)$/) {
1896 return if $table ne $t;
1898 if ($line =~ m/^:(\S+)\s/) {
1900 return if !&$is_pvefw_chain($chain);
1901 $res->{$chain} = "unknown";
1902 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1903 my ($chain, $sig) = ($1, $2);
1904 return if !&$is_pvefw_chain($chain);
1905 $res->{$chain} = $sig;
1906 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD|PREROUTING)\s+-j\s+PVEFW-\1$/) {
1909 # simply ignore the rest
1914 run_command
(["$iptablescmd-save"], outfunc
=> $parser);
1916 return wantarray ?
($res, $hooks) : $res;
1919 sub iptables_chain_digest
{
1921 my $digest = Digest
::SHA-
>new('sha1');
1922 foreach my $rule (@$rules) { # order is important
1923 $digest->add($rule);
1925 return $digest->b64digest;
1928 sub ipset_chain_digest
{
1931 my $digest = Digest
::SHA-
>new('sha1');
1932 foreach my $rule (sort @$rules) { # note: sorted
1933 $digest->add($rule);
1935 return $digest->b64digest;
1938 sub ipset_get_chains
{
1946 return if $line =~ m/^#/;
1947 return if $line =~ m/^\s*$/;
1948 if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1950 $line =~ s/\s+$//; # delete trailing white space
1951 push @{$chains->{$chain}}, $line;
1953 # simply ignore the rest
1958 run_command
(['ipset', 'save'], outfunc
=> $parser);
1960 # compute digest for each chain
1961 foreach my $chain (keys %$chains) {
1962 $res->{$chain} = ipset_chain_digest
($chains->{$chain});
1968 sub ebtables_get_chains
{
1974 return if $line =~ m/^#/;
1975 return if $line =~ m/^\s*$/;
1976 if ($line =~ m/^:(\S+)\s(ACCEPT|DROP|RETURN)$/) {
1977 # Make sure we know chains exist even if they're empty.
1978 $chains->{$1} //= [];
1979 $res->{$1}->{policy
} = $2;
1980 } elsif ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
1983 push @{$chains->{$chain}}, $line;
1985 # simply ignore the rest
1990 run_command
(['ebtables-save'], outfunc
=> $parser);
1991 # compute digest for each chain and store rules as well
1992 foreach my $chain (keys %$chains) {
1993 $res->{$chain}->{rules
} = $chains->{$chain};
1994 $res->{$chain}->{sig
} = iptables_chain_digest
($chains->{$chain});
1999 # substitute action of rule according to action hash
2000 sub rule_substitude_action
{
2001 my ($rule, $actions) = @_;
2003 if (my $action = $rule->{action
}) {
2004 $rule->{action
} = $actions->{$action} if defined($actions->{$action});
2008 # generate a src or dst match
2009 # $dir(ection) is either d or s
2010 sub ipt_gen_src_or_dst_match
{
2011 my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
2016 } elsif ($dir eq 'd') {
2019 die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
2023 if ($adr =~ m/^\+/) {
2024 if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
2027 if ($fw_conf && $fw_conf->{ipset
}->{$name}) {
2028 $ipset_chain = compute_ipset_chain_name
($fw_conf->{vmid
}, $name, $ipversion);
2029 } elsif ($cluster_conf && $cluster_conf->{ipset
}->{$name}) {
2030 $ipset_chain = compute_ipset_chain_name
(0, $name, $ipversion);
2032 die "no such ipset '$name'\n";
2034 $match = "-m set --match-set ${ipset_chain} ${srcdst}";
2036 die "invalid security group name '$adr'\n";
2038 } elsif ($adr =~ m/^${ip_alias_pattern}$/){
2039 my $alias = lc($adr);
2040 my $e = $fw_conf ?
$fw_conf->{aliases
}->{$alias} : undef;
2041 $e = $cluster_conf->{aliases
}->{$alias} if !$e && $cluster_conf;
2042 die "no such alias '$adr'\n" if !$e;
2043 $match = "-${dir} $e->{cidr}";
2044 } elsif ($adr =~ m/\-/){
2045 $match = "-m iprange --${srcdst}-range $adr";
2047 $match = "-${dir} $adr";
2053 # convert a %rule to an array of iptables commands
2054 sub ipt_rule_to_cmds
{
2055 my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
2057 die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
2061 if (defined $rule->{match
}) {
2062 push @match, $rule->{match
};
2064 push @match, "-i $rule->{iface_in}" if $rule->{iface_in
};
2065 push @match, "-o $rule->{iface_out}" if $rule->{iface_out
};
2067 if ($rule->{source
}) {
2068 push @match, ipt_gen_src_or_dst_match
($rule->{source
}, 's', $ipversion, $cluster_conf, $fw_conf);
2070 if ($rule->{dest
}) {
2071 push @match, ipt_gen_src_or_dst_match
($rule->{dest
}, 'd', $ipversion, $cluster_conf, $fw_conf);
2074 if (my $proto = $rule->{proto
}) {
2075 push @match, "-p $proto";
2077 my $multidport = defined($rule->{dport
}) && parse_port_name_number_or_range
($rule->{dport
}, 1);
2078 my $multisport = defined($rule->{sport
}) && parse_port_name_number_or_range
($rule->{sport
}, 0);
2080 my $add_dport = sub {
2081 return if !defined($rule->{dport
});
2083 # NOTE: we re-use dport to store --icmp-type for icmp* protocol
2084 if ($proto eq 'icmp') {
2085 $is_valid_icmp_type->($rule->{dport
}, $icmp_type_names);
2086 push @match, "-m icmp --icmp-type $rule->{dport}";
2087 } elsif ($proto eq 'icmpv6') {
2088 $is_valid_icmp_type->($rule->{dport
}, $icmpv6_type_names);
2089 push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
2090 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
2091 die "protocol $proto does not have ports\n";
2092 } elsif ($multidport) {
2093 push @match, "--match multiport", "--dports $rule->{dport}";
2095 return if !$rule->{dport
};
2096 push @match, "--dport $rule->{dport}";
2100 my $add_sport = sub {
2101 return if !$rule->{sport
};
2103 die "protocol $proto does not have ports\n"
2104 if !$PROTOCOLS_WITH_PORTS->{$proto};
2106 push @match, "--match multiport", "--sports $rule->{sport}";
2108 push @match, "--sport $rule->{sport}";
2112 my $add_icmp_type = sub {
2113 return if !defined($rule->{'icmp-type'}) || $rule->{'icmp-type'} eq '';
2115 die "'icmp-type' can only be set if 'icmp', 'icmpv6' or 'ipv6-icmp' is specified\n"
2116 if ($proto ne 'icmp') && ($proto ne 'icmpv6') && ($proto ne 'ipv6-icmp');
2117 my $type = $proto eq 'icmp' ?
'icmp-type' : 'icmpv6-type';
2119 push @match, "-m $proto --$type $rule->{'icmp-type'}";
2122 # order matters - single port before multiport!
2124 $add_dport->() if $multisport;
2126 $add_dport->() if !$multisport;
2127 } elsif ($rule->{dport
} || $rule->{sport
}) {
2128 die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport
};
2129 die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport
};
2132 push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype
};
2134 my $matchstr = scalar(@match) ?
join(' ', @match) : "";
2137 if (defined $rule->{target
}) {
2138 $targetstr = $rule->{target
};
2140 my $action = (defined $rule->{action
}) ?
$rule->{action
} : "";
2141 my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
2142 $targetstr = ($goto) ?
"-g $action" : "-j $action";
2146 my $log = $rule->{log};
2147 if (defined($log) && $log ne 'nolog') {
2148 my $loglevel = $log_level_hash->{$log};
2149 my $logaction = get_log_rule_base
($chain, $vmid, $rule->{logmsg
}, $loglevel);
2150 push @iptcmds, "-A $chain $matchstr $logaction";
2152 push @iptcmds, "-A $chain $matchstr $targetstr";
2156 sub ruleset_generate_rule
{
2157 my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf, $vmid) = @_;
2161 if ($rule->{macro}) {
2162 $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
2167 # update all or nothing
2169 foreach my $r (@$rules) {
2170 push @ipt_rule_cmds, ipt_rule_to_cmds
($r, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid);
2172 foreach my $c (@ipt_rule_cmds) {
2173 ruleset_add_ipt_cmd
($ruleset, $chain, $c);
2177 sub ruleset_create_chain
{
2178 my ($ruleset, $chain) = @_;
2180 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
2181 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
2183 die "chain '$chain' already exists\n" if $ruleset->{$chain};
2185 $ruleset->{$chain} = [];
2188 sub ruleset_chain_exist
{
2189 my ($ruleset, $chain) = @_;
2191 return $ruleset->{$chain} ?
1 : undef;
2194 # add an iptables command (like generated by ipt_rule_to_cmds) to a chain
2195 sub ruleset_add_ipt_cmd
{
2196 my ($ruleset, $chain, $iptcmd) = @_;
2198 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2200 push @{$ruleset->{$chain}}, $iptcmd;
2203 sub ruleset_addrule
{
2204 my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
2206 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2209 my $loglevel = $log_level_hash->{$log};
2210 my $logaction = get_log_rule_base
($chain, $vmid, $logmsg, $loglevel);
2211 push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
2213 # for stable ebtables digests avoid double-spaces to match ebtables-save output
2214 $match .= ' ' if length($match);
2215 push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
2218 sub ruleset_insertrule
{
2219 my ($ruleset, $chain, $match, $action, $log) = @_;
2221 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2223 unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2226 sub get_log_rule_base
{
2227 my ($chain, $vmid, $msg, $loglevel) = @_;
2229 $vmid = 0 if !defined($vmid);
2230 $msg = "" if !defined($msg);
2233 if (defined($global_log_ratelimit)) {
2234 $rlimit = "-m limit $global_log_ratelimit ";
2237 # Note: we use special format for prefix to pass further
2238 # info to log daemon (VMID, LOGLEVEL and CHAIN)
2239 return "${rlimit}-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2242 sub ruleset_add_chain_policy {
2243 my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2245 if ($policy eq 'ACCEPT') {
2247 my $rule = { action => 'ACCEPT' };
2248 rule_substitude_action($rule, { ACCEPT => $accept_action});
2249 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2251 } elsif ($policy eq 'DROP') {
2253 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop
");
2255 ruleset_addrule($ruleset, $chain, "", "-j DROP
", $loglevel, "policy
$policy: ", $vmid);
2256 } elsif ($policy eq 'REJECT') {
2257 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject
");
2259 ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject
", $loglevel, "policy
$policy: ", $vmid);
2262 die "internal error
: unknown policy
'$policy'";
2266 sub ruleset_chain_add_ndp {
2267 my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2268 return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2270 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-solicitation
", $accept);
2271 if ($direction ne 'OUT' || $options->{radv}) {
2272 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-advertisement
", $accept);
2274 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type neighbor-solicitation
", $accept);
2275 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type neighbor-advertisement
", $accept);
2278 sub ruleset_chain_add_conn_filters {
2279 my ($ruleset, $chain, $allow_invalid, $accept) = @_;
2281 if (!$allow_invalid) {
2282 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
", "-j DROP
");
2284 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
", "-j
$accept");
2287 sub ruleset_chain_add_input_filters {
2288 my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2290 if ($cluster_conf->{ipset}->{blacklist}){
2291 if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist
")) {
2292 ruleset_create_chain($ruleset, "PVEFW-blacklist
");
2293 ruleset_addrule($ruleset, "PVEFW-blacklist
", "", "-j DROP
", $loglevel, "DROP
: ", 0);
2295 my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2296 ruleset_addrule($ruleset, $chain, "-m set
--match-set
${ipset_chain
} src
", "-j PVEFW-blacklist
");
2299 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2300 if ($ipversion == 4) {
2301 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
,NEW
", "-j PVEFW-smurfs
");
2305 if ($options->{tcpflags}) {
2306 ruleset_addrule($ruleset, $chain, "-p tcp
", "-j PVEFW-tcpflags
");
2310 sub ruleset_create_vm_chain {
2311 my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2313 ruleset_create_chain($ruleset, $chain);
2314 my $accept = generate_nfqueue($options);
2316 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2317 if ($ipversion == 4) {
2318 if ($direction eq 'OUT') {
2319 ruleset_generate_rule($ruleset, $chain, $ipversion,
2320 { action => 'PVEFW-SET-ACCEPT-MARK',
2321 proto => 'udp', sport => 68, dport => 67 });
2323 ruleset_generate_rule($ruleset, $chain, $ipversion,
2324 { action => 'ACCEPT',
2325 proto => 'udp', sport => 67, dport => 68 });
2327 } elsif ($ipversion == 6) {
2328 if ($direction eq 'OUT') {
2329 ruleset_generate_rule($ruleset, $chain, $ipversion,
2330 { action => 'PVEFW-SET-ACCEPT-MARK',
2331 proto => 'udp', sport => 546, dport => 547 });
2333 ruleset_generate_rule($ruleset, $chain, $ipversion,
2334 { action => 'ACCEPT',
2335 proto => 'udp', sport => 547, dport => 546 });
2341 if ($direction eq 'OUT') {
2342 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2343 ruleset_addrule($ruleset, $chain, "-m mac
! --mac-source
$macaddr", "-j DROP
");
2345 if ($ipversion == 6 && !$options->{radv}) {
2346 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-advertisement
", "-j DROP
");
2348 if ($ipfilter_ipset) {
2349 ruleset_addrule($ruleset, $chain, "-m set
! --match-set
$ipfilter_ipset src
", "-j DROP
");
2351 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2354 my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j
$accept";
2355 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2358 sub ruleset_add_group_rule {
2359 my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2361 my $group = $rule->{action};
2362 my $group_chain = "GROUP-
$group-$direction";
2363 if(!ruleset_chain_exist($ruleset, $group_chain)){
2364 generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2367 if ($direction eq 'OUT' && $rule->{iface_out}) {
2368 ruleset_addrule($ruleset, $chain, "-o
$rule->{iface_out
}", "-j
$group_chain");
2369 } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2370 ruleset_addrule($ruleset, $chain, "-i
$rule->{iface_in
}", "-j
$group_chain");
2372 ruleset_addrule($ruleset, $chain, "", "-j
$group_chain");
2375 ruleset_addrule($ruleset, $chain, "-m mark
--mark
$FWACCEPTMARK_ON", "-j
$action");
2378 sub ruleset_generate_vm_rules {
2379 my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion, $vmid) = @_;
2381 my $lc_direction = lc($direction);
2383 my $in_accept = generate_nfqueue($options);
2385 foreach my $rule (@$rules) {
2386 next if $rule->{iface} && $rule->{iface} ne $netid;
2387 next if !$rule->{enable} || $rule->{errors};
2388 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2390 if ($rule->{type} eq 'group') {
2391 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2392 $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2394 next if $rule->{type} ne $lc_direction;
2396 $rule->{logmsg} = "$rule->{action
}: ";
2397 if ($direction eq 'OUT') {
2398 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" });
2399 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2401 rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject
" });
2402 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2410 sub generate_nfqueue {
2413 if ($options->{ips}) {
2414 my $action = "NFQUEUE
";
2415 if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2416 if (defined($3) && defined($1)) {
2417 $action .= " --queue-balance
$1:$3";
2418 } elsif (defined($1)) {
2419 $action .= " --queue-num
$1";
2422 $action .= " --queue-bypass
" if $feature_ipset_nomatch; #need kernel 3.10
2429 sub ruleset_generate_vm_ipsrules {
2430 my ($ruleset, $options, $direction, $iface) = @_;
2432 if ($options->{ips} && $direction eq 'IN') {
2433 my $nfqueue = generate_nfqueue($options);
2435 if (!ruleset_chain_exist($ruleset, "PVEFW-IPS
")) {
2436 ruleset_create_chain($ruleset, "PVEFW-IPS
");
2439 ruleset_addrule($ruleset, "PVEFW-IPS
", "-m physdev
--physdev-out
$iface --physdev-is-bridged
", "-j
$nfqueue");
2443 sub generate_tap_rules_direction {
2444 my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2446 my $lc_direction = lc($direction);
2448 my $rules = $vmfw_conf->{rules};
2450 my $options = $vmfw_conf->{options};
2451 my $loglevel = get_option_log_level($options, "log_level_
${lc_direction
}");
2453 my $tapchain = "$iface-$direction";
2455 my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2456 my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2457 if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2459 if ($options->{enable}) {
2460 # create chain with mac and ip filter
2461 ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2463 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion, $vmid);
2465 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2470 if ($direction eq 'OUT') {
2471 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2473 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2476 my $accept = generate_nfqueue($options);
2477 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : $accept;
2478 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2480 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : 'ACCEPT';
2481 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2484 # plug the tap chain to bridge chain
2485 if ($direction eq 'IN') {
2486 ruleset_addrule($ruleset, "PVEFW-FWBR-IN
",
2487 "-m physdev
--physdev-is-bridged
--physdev-out
$iface", "-j
$tapchain");
2489 ruleset_addrule($ruleset, "PVEFW-FWBR-OUT
",
2490 "-m physdev
--physdev-is-bridged
--physdev-in
$iface", "-j
$tapchain");
2494 sub enable_host_firewall {
2495 my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf) = @_;
2497 my $options = $hostfw_conf->{options};
2498 my $cluster_options = $cluster_conf->{options};
2499 my $rules = $hostfw_conf->{rules};
2500 my $cluster_rules = $cluster_conf->{rules};
2502 # corosync preparation
2503 my $corosync_rule = "-p udp
--dport
5404:5405";
2504 my $corosync_local_addresses = {};
2505 my $multicast_enabled;
2506 my $local_hostname = PVE::INotify::nodename();
2507 if (defined($corosync_conf)) {
2508 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2509 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2511 if ($node_name eq $local_hostname) {
2512 $corosync_local_addresses->{$key} = $node_ip;
2516 # allow multicast only if enabled in config
2517 my $corosync_transport = $corosync_conf->{main}->{totem}->{transport};
2518 $multicast_enabled = defined($corosync_transport) && $corosync_transport eq 'udp';
2521 # host inbound firewall
2522 my $chain = "PVEFW-HOST-IN
";
2523 ruleset_create_chain($ruleset, $chain);
2525 my $loglevel = get_option_log_level($options, "log_level_in
");
2527 ruleset_addrule($ruleset, $chain, "-i lo
", "-j ACCEPT
");
2529 ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2530 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2531 ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2533 # we use RETURN because we need to check also tap rules
2534 my $accept_action = 'RETURN';
2536 ruleset_addrule($ruleset, $chain, "-p igmp
", "-j
$accept_action"); # important for multicast
2538 # add host rules first, so that cluster wide rules can be overwritten
2539 foreach my $rule (@$rules, @$cluster_rules) {
2540 next if !$rule->{enable} || $rule->{errors};
2541 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2543 $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2546 $rule->{logmsg} = "$rule->{action
}: ";
2547 if ($rule->{type} eq 'group') {
2548 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2549 } elsif ($rule->{type} eq 'in') {
2550 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" });
2551 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2555 delete $rule->{iface_in};
2558 # allow standard traffic for management ipset (includes cluster network)
2559 my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management
", $ipversion);
2560 my $mngmntsrc = "-m set
--match-set
${mngmnt_ipset_chain
} src
";
2561 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
8006", "-j
$accept_action"); # PVE API
2562 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
5900:5999", "-j
$accept_action"); # PVE VNC Console
2563 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
3128", "-j
$accept_action"); # SPICE Proxy
2564 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
22", "-j
$accept_action"); # SSH
2565 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
60000:60050", "-j
$accept_action"); # Migration
2567 # corosync inbound rules
2568 if (defined($corosync_conf)) {
2569 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
$corosync_rule", "-j
$accept_action")
2570 if $multicast_enabled;
2572 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2573 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2574 my $destination = $corosync_local_addresses->{$key};
2576 if ($node_name ne $local_hostname && defined($destination)) {
2577 # accept only traffic on same ring
2578 ruleset_addrule($ruleset, $chain, "-d
$destination -s
$node_ip $corosync_rule", "-j
$accept_action");
2583 # implement input policy
2584 my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2585 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2587 # host outbound firewall
2588 $chain = "PVEFW-HOST-OUT
";
2589 ruleset_create_chain($ruleset, $chain);
2591 $loglevel = get_option_log_level($options, "log_level_out
");
2593 ruleset_addrule($ruleset, $chain, "-o lo
", "-j ACCEPT
");
2595 ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2597 # we use RETURN because we may want to check other thigs later
2598 $accept_action = 'RETURN';
2599 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j
$accept_action");
2601 ruleset_addrule($ruleset, $chain, "-p igmp
", "-j
$accept_action"); # important for multicast
2603 # add host rules first, so that cluster wide rules can be overwritten
2604 foreach my $rule (@$rules, @$cluster_rules) {
2605 next if !$rule->{enable} || $rule->{errors};
2606 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2608 $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2610 $rule->{logmsg} = "$rule->{action
}: ";
2611 if ($rule->{type} eq 'group') {
2612 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2613 } elsif ($rule->{type} eq 'out') {
2614 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" });
2615 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2619 delete $rule->{iface_out};
2622 # allow standard traffic on cluster network
2623 my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2624 my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2626 if ($localnet && ($ipversion == $localnet_ver)) {
2627 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
8006", "-j
$accept_action"); # PVE API
2628 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
22", "-j
$accept_action"); # SSH
2629 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
5900:5999", "-j
$accept_action"); # PVE VNC Console
2630 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
3128", "-j
$accept_action"); # SPICE Proxy
2633 # corosync outbound rules
2634 if (defined($corosync_conf)) {
2635 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
$corosync_rule", "-j
$accept_action")
2636 if $multicast_enabled;
2638 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2639 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2640 my $source = $corosync_local_addresses->{$key};
2642 if ($node_name ne $local_hostname && defined($source)) {
2643 # accept only traffic on same ring
2644 ruleset_addrule($ruleset, $chain, "-s
$source -d
$node_ip $corosync_rule", "-j
$accept_action");
2649 # implement output policy
2650 $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2651 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2653 ruleset_addrule($ruleset, "PVEFW-OUTPUT
", "", "-j PVEFW-HOST-OUT
");
2654 ruleset_addrule($ruleset, "PVEFW-INPUT
", "", "-j PVEFW-HOST-IN
");
2657 sub generate_group_rules {
2658 my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2660 my $rules = $cluster_conf->{groups}->{$group};
2663 warn "no such security group
'$group'\n";
2664 $rules = []; # create empty chain
2667 my $chain = "GROUP-
${group
}-IN
";
2669 ruleset_create_chain($ruleset, $chain);
2670 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2672 foreach my $rule (@$rules) {
2673 next if $rule->{type} ne 'in';
2674 next if !$rule->{enable} || $rule->{errors};
2675 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2676 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" });
2677 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2680 $chain = "GROUP-
${group
}-OUT
";
2682 ruleset_create_chain($ruleset, $chain);
2683 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2685 foreach my $rule (@$rules) {
2686 next if $rule->{type} ne 'out';
2687 next if !$rule->{enable} || $rule->{errors};
2688 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2689 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2690 # check also other tap rules later
2691 rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject
" });
2692 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2697 my $valid_netdev_names = {};
2698 for (my $i = 0; $i < $MAX_NETS; $i++) {
2699 $valid_netdev_names->{"net
$i"} = 1;
2702 sub get_mark_values {
2703 my ($value, $mask) = @_;
2704 $value = hex($value) if $value =~ /^0x/;
2705 $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2706 $mask = 0xffffffff if !defined($mask);
2707 return ($value, $mask);
2711 my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env) = @_;
2713 my $orig_line = $line;
2717 # we can add single line comments to the end of the rule
2718 if ($line =~ s/#\s*(.*?)\s*$//) {
2719 $rule->{comment} = decode('utf8', $1);
2722 # we can disable a rule when prefixed with '|'
2724 $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2726 $line =~ s/^(\S+)\s+(\S+)\s*// ||
2727 die "unable to parse rule
: $line\n";
2729 $rule->{type} = lc($1);
2730 $rule->{action} = $2;
2732 if ($rule->{type} eq 'in' || $rule->{type} eq 'out') {
2733 if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2734 $rule->{macro} = $1;
2735 $rule->{action} = $2;
2739 while (length($line)) {
2740 if ($line =~ s/^-i (\S+)\s*//) {
2741 $rule->{iface} = $1;
2745 last if $rule->{type} eq 'group';
2747 if ($line =~ s/^(?:-p|--?proto) (\S+)\s*//) {
2748 $rule->{proto} = $1;
2752 if ($line =~ s/^--?dport (\S+)\s*//) {
2753 $rule->{dport} = $1;
2757 if ($line =~ s/^--?sport (\S+)\s*//) {
2758 $rule->{sport} = $1;
2761 if ($line =~ s/^--?source (\S+)\s*//) {
2762 $rule->{source} = $1;
2765 if ($line =~ s/^--?dest (\S+)\s*//) {
2769 if ($line =~ s/^--?log (emerg|alert|crit|err|warning|notice|info|debug|nolog)\s*//) {
2773 if ($line =~ s/^--?icmp-type (\S+)\s*//) {
2774 $rule->{'icmp-type'} = $1;
2781 die "unable to parse rule parameters
: $line\n" if length($line);
2783 $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2784 if ($rule->{errors}) {
2785 # The verbose flag really means we're running from the CLI and want
2786 # output on the console - in the other case we really want such errors
2787 # to go into the syslog instead.
2788 my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2789 $log->("$prefix - errors
in rule parameters
: $orig_line\n");
2790 foreach my $p (keys %{$rule->{errors}}) {
2791 $log->(" $p: $rule->{errors
}->{$p}\n");
2798 sub verify_ethertype {
2800 my $types = get_etc_ethertypes();
2801 die "unknown ethernet protocol type
: $value\n"
2802 if !defined($types->{byname}->{$value}) &&
2803 !defined($types->{byid}->{$value});
2806 sub parse_vmfw_option {
2811 my $loglevels = "emerg
|alert
|crit
|err
|warning
|notice
|info
|debug
|nolog
";
2813 if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2816 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2818 $value = $2 ? lc($3) : '';
2819 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2822 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2825 } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
2828 verify_ethertype($_) foreach split(/\s*,\s*/, $value);
2830 die "can
't parse option '$line'\n"
2833 return ($opt, $value);
2836 sub parse_hostfw_option {
2841 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2843 if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid|protection_synflood):\s*(0|1)\s*$/i) {
2846 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2848 $value = $2 ? lc($3) : '';
2849 } elsif ($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*$/i) {
2853 die "can't parse option
'$line'\n"
2856 return ($opt, $value);
2859 sub parse_clusterfw_option {
2864 if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2867 if (($value > 1) && ((time() - $value) > 60)) {
2870 } elsif ($line =~ m/^(ebtables):\s*(0|1)\s*$/i) {
2873 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2876 } elsif ($line =~ m/^(log_ratelimit):\s*(\S+)\s*$/) {
2880 die "can
't parse option '$line'\n"
2883 return ($opt, $value);
2887 my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2889 my $alias = lc($cidr);
2890 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2891 $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2893 die "no such alias '$cidr'\n" if !$e;;
2895 return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2898 sub parse_ip_or_cidr {
2903 if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2906 } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2910 die "value does not look like a valid IP address or CIDR network\n";
2913 return wantarray ? ($cidr, $ipversion) : $cidr;
2919 # we can add single line comments to the end of the line
2920 my $comment = decode('utf8
', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2922 if ($line =~ m/^(\S+)\s(\S+)$/) {
2923 my ($name, $cidr) = ($1, $2);
2926 ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2931 ipversion => $ipversion,
2933 $data->{comment} = $comment if $comment;
2940 sub generic_fw_config_parser {
2941 my ($filename, $cluster_conf, $empty_conf, $rule_env) = @_;
2946 my $res = $empty_conf;
2949 if ($filename =~ m!^/etc/pve/(.*)$!) {
2950 $raw = PVE::Cluster::get_config($1);
2952 $raw = eval { PVE::Tools::file_get_contents($filename) }; # ignore errors
2956 my $curr_group_keys = {};
2959 while ($raw =~ /^\h*(.*?)\h*$/gm) {
2962 next if $line =~ m/^#/;
2963 next if $line =~ m/^\s*$/;
2966 my $prefix = "$filename (line $linenr)";
2968 if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2969 $section = 'options
';
2973 if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2974 $section = 'aliases
';
2978 if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2979 $section = 'groups
';
2983 die "security group name too long\n" if length($group) > $max_group_name_length;
2984 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2987 ($section, $group, $comment) = undef;
2988 warn "$prefix: $err";
2992 $res->{$section}->{$group} = [];
2993 $res->{group_comments}->{$group} = decode('utf8
', $comment)
2998 if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
3003 if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
3008 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
3009 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
3012 ($section, $group, $comment) = undef;
3013 warn "$prefix: $err";
3017 $res->{$section}->{$group} = [];
3018 $curr_group_keys = {};
3020 $res->{ipset_comments}->{$group} = decode('utf8
', $comment)
3026 warn "$prefix: skip line - no section\n";
3030 if ($section eq 'options
') {
3033 if ($rule_env eq 'cluster
') {
3034 ($opt, $value) = parse_clusterfw_option($line);
3035 } elsif ($rule_env eq 'host
') {
3036 ($opt, $value) = parse_hostfw_option($line);
3038 ($opt, $value) = parse_vmfw_option($line);
3040 $res->{options}->{$opt} = $value;
3042 warn "$prefix: $@" if $@;
3043 } elsif ($section eq 'aliases
') {
3045 my $data = parse_alias($line);
3046 $res->{aliases}->{lc($data->{name})} = $data;
3048 warn "$prefix: $@" if $@;
3049 } elsif ($section eq 'rules
') {
3051 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env); };
3053 warn "$prefix: $err";
3056 push @{$res->{$section}}, $rule;
3057 } elsif ($section eq 'groups
') {
3059 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group
'); };
3061 warn "$prefix: $err";
3064 push @{$res->{$section}->{$group}}, $rule;
3065 } elsif ($section eq 'ipset
') {
3066 # we can add single line comments to the end of the rule
3067 my $comment = decode('utf8
', $1) if $line =~ s/#\s*(.*?)\s*$//;
3069 $line =~ m/^(\!)?\s*(\S+)\s*$/;
3074 if ($nomatch && !$feature_ipset_nomatch) {
3075 $errors->{nomatch} = "nomatch not supported by kernel";
3079 if ($cidr =~ m/^${ip_alias_pattern}$/) {
3080 resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
3082 $cidr = parse_ip_or_cidr($cidr);
3084 die "duplicate ipset entry for '$cidr'\n"
3085 if defined($curr_group_keys->{$cidr});
3089 $errors->{cidr} = $err;
3092 if ($cidr =~ m!/0+$!) {
3093 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
3096 my $entry = { cidr => $cidr };
3097 $entry->{nomatch} = 1 if $nomatch;
3098 $entry->{comment} = $comment if $comment;
3099 $entry->{errors} = $errors if $errors;
3101 if ($verbose && $errors) {
3102 warn "$prefix - errors in ipset '$group': $line\n";
3103 foreach my $p (keys %{$errors}) {
3104 warn " $p: $errors->{$p}\n";
3108 push @{$res->{$section}->{$group}}, $entry;
3109 $curr_group_keys->{$cidr} = 1;
3111 warn "$prefix: skip line - unknown section\n";
3119 # this is only used to prevent concurrent runs of rule compilation/application
3120 # see lock_*_conf for cfs locks protectiong config modification
3122 my ($code, @param) = @_;
3126 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
3133 sub read_local_vm_config {
3138 my $vmdata = { qemu => $qemu, lxc => $lxc };
3140 my $vmlist = PVE::Cluster::get_vmlist();
3141 return $vmdata if !$vmlist || !$vmlist->{ids};
3142 my $ids = $vmlist->{ids};
3144 foreach my $vmid (keys %$ids) {
3145 next if !$vmid; # skip VE0
3146 my $d = $ids->{$vmid};
3147 next if !$d->{node} || $d->{node} ne $nodename;
3148 next if !$d->{type};
3149 if ($d->{type} eq 'qemu
') {
3150 if ($have_qemu_server) {
3151 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
3152 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3153 $qemu->{$vmid} = $conf;
3156 } elsif ($d->{type} eq 'lxc
') {
3158 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
3159 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3160 $lxc->{$vmid} = $conf;
3169 sub lock_vmfw_conf {
3170 my ($vmid, $timeout, $code, @param) = @_;
3172 die "can't
lock VM firewall config
for undefined VMID
\n"
3175 my $res = PVE::Cluster::cfs_lock_firewall("vm-
$vmid", $timeout, $code, @param);
3181 sub load_vmfw_conf {
3182 my ($cluster_conf, $rule_env, $vmid, $dir) = @_;
3184 $dir = $pvefw_conf_dir if !defined($dir);
3185 my $filename = "$dir/$vmid.fw
";
3192 ipset_comments => {},
3195 my $vmfw_conf = generic_fw_config_parser($filename, $cluster_conf, $empty_conf, $rule_env);
3196 $vmfw_conf->{vmid} = $vmid;
3201 my $format_rules = sub {
3202 my ($rules, $allow_iface) = @_;
3206 foreach my $rule (@$rules) {
3207 if ($rule->{type} eq 'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
3208 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
3209 $raw .= uc($rule->{type});
3210 if ($rule->{macro}) {
3211 $raw .= " $rule->{macro}($rule->{action
})";
3213 $raw .= " " . $rule->{action};
3215 if ($allow_iface && $rule->{iface}) {
3216 $raw .= " -i
$rule->{iface
}";
3219 if ($rule->{type} ne 'group') {
3220 $raw .= " -source
$rule->{source
}" if $rule->{source};
3221 $raw .= " -dest
$rule->{dest
}" if $rule->{dest};
3222 $raw .= " -p
$rule->{proto
}" if $rule->{proto};
3223 $raw .= " -dport
$rule->{dport
}" if $rule->{dport};
3224 $raw .= " -sport
$rule->{sport
}" if $rule->{sport};
3225 $raw .= " -log $rule->{log}" if $rule->{log};
3226 $raw .= " -icmp-type
$rule->{'icmp-type'}" if defined($rule->{'icmp-type'}) && $rule->{'icmp-type'} ne '';
3229 $raw .= " # " . encode('utf8', $rule->{comment})
3230 if $rule->{comment
} && $rule->{comment
} !~ m/^\s*$/;
3233 die "unknown rule type '$rule->{type}'";
3240 my $format_options = sub {
3245 $raw .= "[OPTIONS]\n\n";
3246 foreach my $opt (keys %$options) {
3247 $raw .= "$opt: $options->{$opt}\n";
3254 my $format_aliases = sub {
3259 $raw .= "[ALIASES]\n\n";
3260 foreach my $k (keys %$aliases) {
3261 my $e = $aliases->{$k};
3262 $raw .= "$e->{name} $e->{cidr}";
3263 $raw .= " # " . encode
('utf8', $e->{comment
})
3264 if $e->{comment
} && $e->{comment
} !~ m/^\s*$/;
3272 my $format_ipsets = sub {
3277 foreach my $ipset (sort keys %{$fw_conf->{ipset
}}) {
3278 if (my $comment = $fw_conf->{ipset_comments
}->{$ipset}) {
3279 my $utf8comment = encode
('utf8', $comment);
3280 $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3282 $raw .= "[IPSET $ipset]\n\n";
3284 my $options = $fw_conf->{ipset
}->{$ipset};
3287 foreach my $entry (@$options) {
3288 my $cidr = $entry->{cidr
};
3289 if (defined($nethash->{$cidr})) {
3290 warn "ignoring duplicate ipset entry '$cidr'\n";
3294 $nethash->{$cidr} = $entry;
3297 foreach my $cidr (sort keys %$nethash) {
3298 my $entry = $nethash->{$cidr};
3299 my $line = $entry->{nomatch
} ?
'!' : '';
3300 $line .= $entry->{cidr
};
3301 $line .= " # " . encode
('utf8', $entry->{comment
})
3302 if $entry->{comment
} && $entry->{comment
} !~ m/^\s*$/;
3312 sub save_vmfw_conf
{
3313 my ($vmid, $vmfw_conf) = @_;
3317 my $options = $vmfw_conf->{options
};
3318 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3320 my $aliases = $vmfw_conf->{aliases
};
3321 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3323 $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset
};
3325 my $rules = $vmfw_conf->{rules
} || [];
3326 if ($rules && scalar(@$rules)) {
3327 $raw .= "[RULES]\n\n";
3328 $raw .= &$format_rules($rules, 1);
3332 my $filename = "$pvefw_conf_dir/$vmid.fw";
3334 mkdir $pvefw_conf_dir;
3335 PVE
::Tools
::file_set_contents
($filename, $raw);
3341 sub remove_vmfw_conf
{
3344 my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3346 unlink $vmfw_conffile;
3349 sub clone_vmfw_conf
{
3350 my ($vmid, $newid) = @_;
3352 my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3353 my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3355 lock_vmfw_conf
($newid, 10, sub {
3356 if (-f
$clonevm_conffile) {
3357 unlink $clonevm_conffile;
3359 if (-f
$sourcevm_conffile) {
3360 my $data = PVE
::Tools
::file_get_contents
($sourcevm_conffile);
3361 PVE
::Tools
::file_set_contents
($clonevm_conffile, $data);
3366 sub read_vm_firewall_configs
{
3367 my ($cluster_conf, $vmdata, $dir) = @_;
3369 my $vmfw_configs = {};
3371 foreach my $vmid (keys %{$vmdata->{qemu
}}) {
3372 my $vmfw_conf = load_vmfw_conf
($cluster_conf, 'vm', $vmid, $dir);
3373 next if !$vmfw_conf->{options
}; # skip if file does not exist
3374 $vmfw_configs->{$vmid} = $vmfw_conf;
3376 foreach my $vmid (keys %{$vmdata->{lxc
}}) {
3377 my $vmfw_conf = load_vmfw_conf
($cluster_conf, 'ct', $vmid, $dir);
3378 next if !$vmfw_conf->{options
}; # skip if file does not exist
3379 $vmfw_configs->{$vmid} = $vmfw_conf;
3382 return $vmfw_configs;
3385 sub get_option_log_level
{
3386 my ($options, $k) = @_;
3388 my $v = $options->{$k};
3389 $v = $default_log_level if !defined($v);
3391 return undef if $v eq '' || $v eq 'nolog';
3393 return $v if defined($log_level_hash->{$v});
3395 warn "unknown log level ($k = '$v')\n";
3400 sub generate_std_chains
{
3401 my ($ruleset, $options, $ipversion) = @_;
3403 my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3405 my $loglevel = get_option_log_level
($options, 'smurf_log_level');
3406 my $chain = 'PVEFW-smurflog';
3407 if ( $std_chains->{$chain} ) {
3408 foreach my $r (@{$std_chains->{$chain}}) {
3409 $r->{log} = $loglevel;
3413 # same as shorewall logflags action.
3414 $loglevel = get_option_log_level
($options, 'tcp_flags_log_level');
3415 $chain = 'PVEFW-logflags';
3416 if ( $std_chains->{$chain} ) {
3417 foreach my $r (@{$std_chains->{$chain}}) {
3418 $r->{log} = $loglevel;
3422 foreach my $chain (keys %$std_chains) {
3423 ruleset_create_chain
($ruleset, $chain);
3424 foreach my $rule (@{$std_chains->{$chain}}) {
3426 ruleset_generate_rule
($ruleset, $chain, $ipversion, $rule, 0);
3428 die "rule $rule as string - should not happen";
3434 sub generate_ipset_chains
{
3435 my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3437 foreach my $ipset (keys %{$ipsets}) {
3439 my $options = $ipsets->{$ipset};
3441 if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3442 if (my $ips = $device_ips->{$1}) {
3443 $options = [@$options, @$ips];
3449 foreach my $entry (@$options) {
3450 next if $entry->{errors
}; # skip entries with errors
3453 if ($entry->{cidr
} =~ m/^${ip_alias_pattern}$/) {
3454 ($cidr, $ver) = resolve_alias
($clusterfw_conf, $fw_conf, $entry->{cidr
});
3456 ($cidr, $ver) = parse_ip_or_cidr
($entry->{cidr
});
3458 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3460 # ip_compress_address takes an address only, no CIDR
3461 my ($addr, $prefix_len) = ($cidr =~ m
@^([^/]*)(/.*)?
$@);
3462 $cidr = lc(Net
::IP
::ip_compress_address
($addr, 6));
3463 $cidr .= $prefix_len if defined($prefix_len);
3469 $nethash->{$ver}->{$cidr} = { cidr
=> $cidr, nomatch
=> $entry->{nomatch
} };
3474 foreach my $ipversion (4, 6) {
3475 my $data = $nethash->{$ipversion};
3477 my $name = compute_ipset_chain_name
($fw_conf->{vmid
}, $ipset, $ipversion);
3479 my $hashsize = scalar(@$options);
3480 if ($hashsize <= 64) {
3483 $hashsize = round_powerof2
($hashsize);
3486 my $family = $ipversion == "6" ?
"inet6" : "inet";
3488 $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3490 foreach my $cidr (sort keys %$data) {
3491 my $entry = $data->{$cidr};
3493 my $cmd = "add $name $cidr";
3494 if ($entry->{nomatch
}) {
3495 if ($feature_ipset_nomatch) {
3496 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3498 warn "ignore !$cidr - nomatch not supported by kernel\n";
3501 push @{$ipset_ruleset->{$name}}, $cmd;
3508 sub round_powerof2
{
3512 $int |= $int >> $_ foreach (1,2,4,8,16);
3516 my $set_global_log_ratelimit = sub {
3517 my $cluster_opts = shift;
3519 $global_log_ratelimit = '--limit 1/sec';
3520 if (defined(my $log_rlimit = $cluster_opts->{log_ratelimit
})) {
3521 my $ll_format = $cluster_option_properties->{log_ratelimit
}->{format
};
3522 my $limit = PVE
::JSONSchema
::parse_property_string
($ll_format, $log_rlimit);
3524 if ($limit->{enable
}) {
3525 if (my $rate = $limit->{rate
}) {
3526 $global_log_ratelimit = "--limit $rate";
3528 if (my $burst = $limit->{burst
}) {
3529 $global_log_ratelimit .= " --limit-burst $burst";
3532 $global_log_ratelimit = undef;
3537 sub lock_clusterfw_conf
{
3538 my ($timeout, $code, @param) = @_;
3540 my $res = PVE
::Cluster
::cfs_lock_firewall
("cluster", $timeout, $code, @param);
3546 sub load_clusterfw_conf
{
3547 my ($filename) = @_;
3549 $filename = $clusterfw_conf_filename if !defined($filename);
3555 group_comments
=> {},
3557 ipset_comments
=> {},
3560 my $cluster_conf = generic_fw_config_parser
($filename, $empty_conf, $empty_conf, 'cluster');
3561 $set_global_log_ratelimit->($cluster_conf->{options
});
3563 return $cluster_conf;
3566 sub save_clusterfw_conf
{
3567 my ($cluster_conf) = @_;
3571 my $options = $cluster_conf->{options
};
3572 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3574 my $aliases = $cluster_conf->{aliases
};
3575 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3577 $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset
};
3579 my $rules = $cluster_conf->{rules
};
3580 if ($rules && scalar(@$rules)) {
3581 $raw .= "[RULES]\n\n";
3582 $raw .= &$format_rules($rules, 1);
3586 if ($cluster_conf->{groups
}) {
3587 foreach my $group (sort keys %{$cluster_conf->{groups
}}) {
3588 my $rules = $cluster_conf->{groups
}->{$group};
3589 if (my $comment = $cluster_conf->{group_comments
}->{$group}) {
3590 my $utf8comment = encode
('utf8', $comment);
3591 $raw .= "[group $group] # $utf8comment\n\n";
3593 $raw .= "[group $group]\n\n";
3596 $raw .= &$format_rules($rules, 0);
3602 mkdir $pvefw_conf_dir;
3603 PVE
::Tools
::file_set_contents
($clusterfw_conf_filename, $raw);
3605 unlink $clusterfw_conf_filename;
3609 sub lock_hostfw_conf
{
3610 my ($timeout, $code, @param) = @_;
3612 my $res = PVE
::Cluster
::cfs_lock_firewall
("host-$nodename", $timeout, $code, @param);
3618 sub load_hostfw_conf
{
3619 my ($cluster_conf, $filename) = @_;
3621 $filename = $hostfw_conf_filename if !defined($filename);
3623 my $empty_conf = { rules
=> [], options
=> {}};
3624 return generic_fw_config_parser
($filename, $cluster_conf, $empty_conf, 'host');
3627 sub save_hostfw_conf
{
3628 my ($hostfw_conf) = @_;
3632 my $options = $hostfw_conf->{options
};
3633 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3635 my $rules = $hostfw_conf->{rules
};
3636 if ($rules && scalar(@$rules)) {
3637 $raw .= "[RULES]\n\n";
3638 $raw .= &$format_rules($rules, 1);
3643 PVE
::Tools
::file_set_contents
($hostfw_conf_filename, $raw);
3645 unlink $hostfw_conf_filename;
3650 my ($cluster_conf, $hostfw_conf, $vmdata, $corosync_conf) = @_;
3654 # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3655 $pve_std_chains = dclone
($pve_std_chains_conf);
3657 if ($vmdata) { # test mode
3658 my $testdir = $vmdata->{testdir
} || die "no test directory specified";
3659 my $filename = "$testdir/cluster.fw";
3660 $cluster_conf = load_clusterfw_conf
($filename);
3662 $filename = "$testdir/host.fw";
3663 $hostfw_conf = load_hostfw_conf
($cluster_conf, $filename);
3665 $vmfw_configs = read_vm_firewall_configs
($cluster_conf, $vmdata, $testdir);
3666 } else { # normal operation
3667 $cluster_conf = load_clusterfw_conf
(undef) if !$cluster_conf;
3669 $hostfw_conf = load_hostfw_conf
($cluster_conf, undef) if !$hostfw_conf;
3671 # cfs_update is handled by daemon or API
3672 $corosync_conf = PVE
::Cluster
::cfs_read_file
("corosync.conf")
3673 if !defined($corosync_conf) && PVE
::Corosync
::check_conf_exists
(1);
3675 $vmdata = read_local_vm_config
();
3676 $vmfw_configs = read_vm_firewall_configs
($cluster_conf, $vmdata, undef);
3679 return ({},{},{},{}) if !$cluster_conf->{options
}->{enable
};
3682 if ($cluster_conf->{aliases
}->{local_network
}) {
3683 $localnet = $cluster_conf->{aliases
}->{local_network
}->{cidr
};
3686 ($localnet, $localnet_ver) = parse_ip_or_cidr
(local_network
() || '127.0.0.0/8');
3688 $cluster_conf->{aliases
}->{local_network
} = {
3689 name
=> 'local_network', cidr
=> $localnet, ipversion
=> $localnet_ver };
3692 push @{$cluster_conf->{ipset
}->{management
}}, { cidr
=> $localnet };
3696 $ruleset->{filter
} = compile_iptables_filter
($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3697 $ruleset->{raw
} = compile_iptables_raw
($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3698 $rulesetv6->{filter
} = compile_iptables_filter
($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
3699 $rulesetv6->{raw
} = compile_iptables_raw
($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
3700 my $ebtables_ruleset = compile_ebtables_filter
($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata);
3701 my $ipset_ruleset = compile_ipsets
($cluster_conf, $vmfw_configs, $vmdata);
3703 return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
3706 sub compile_iptables_raw
{
3707 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
3711 my $hostfw_options = $hostfw_conf->{options
} || {};
3712 my $protection_synflood = $hostfw_options->{protection_synflood
} || 0;
3714 if($protection_synflood) {
3716 my $protection_synflood_rate = $hostfw_options->{protection_synflood_rate
} ?
$hostfw_options->{protection_synflood_rate
} : 200;
3717 my $protection_synflood_burst = $hostfw_options->{protection_synflood_burst
} ?
$hostfw_options->{protection_synflood_burst
} : 1000;
3718 my $protection_synflood_limit = $hostfw_options->{protection_synflood_limit
} ?
$hostfw_options->{protection_synflood_limit
} : 3000;
3719 my $protection_synflood_expire = $hostfw_options->{nf_conntrack_tcp_timeout_syn_recv
} ?
$hostfw_options->{nf_conntrack_tcp_timeout_syn_recv
} : 60;
3720 $protection_synflood_expire = $protection_synflood_expire * 1000;
3721 my $protection_synflood_mask = $ipversion == 4 ?
32 : 64;
3723 ruleset_create_chain
($ruleset, "PVEFW-PREROUTING");
3724 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 $protection_synflood_expire", "-j DROP");
3730 sub compile_iptables_filter
{
3731 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
3735 ruleset_create_chain
($ruleset, "PVEFW-INPUT");
3736 ruleset_create_chain
($ruleset, "PVEFW-OUTPUT");
3738 ruleset_create_chain
($ruleset, "PVEFW-FORWARD");
3740 my $hostfw_options = $hostfw_conf->{options
} || {};
3742 # fixme: what log level should we use here?
3743 my $loglevel = get_option_log_level
($hostfw_options, "log_level_out");
3745 my $conn_allow_invalid = $hostfw_options->{nf_conntrack_allow_invalid
} // 0;
3746 ruleset_chain_add_conn_filters
($ruleset, "PVEFW-FORWARD", $conn_allow_invalid, "ACCEPT");
3748 ruleset_create_chain
($ruleset, "PVEFW-FWBR-IN");
3749 ruleset_chain_add_input_filters
($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3751 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3753 ruleset_create_chain
($ruleset, "PVEFW-FWBR-OUT");
3754 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3756 generate_std_chains
($ruleset, $hostfw_options, $ipversion);
3758 my $hostfw_enable = !(defined($hostfw_options->{enable
}) && ($hostfw_options->{enable
} == 0));
3760 if ($hostfw_enable) {
3761 eval { enable_host_firewall
($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf); };
3762 warn $@ if $@; # just to be sure - should not happen
3765 # generate firewall rules for QEMU VMs
3766 foreach my $vmid (sort keys %{$vmdata->{qemu
}}) {
3768 my $conf = $vmdata->{qemu
}->{$vmid};
3769 my $vmfw_conf = $vmfw_configs->{$vmid};
3770 return if !$vmfw_conf || !$vmfw_conf->{options
}->{enable
};
3772 foreach my $netid (sort keys %$conf) {
3773 next if $netid !~ m/^net(\d+)$/;
3774 my $net = PVE
::QemuServer
::parse_net
($conf->{$netid});
3775 next if !$net->{firewall
};
3777 my $iface = "tap${vmid}i$1";
3778 my $macaddr = $net->{macaddr
};
3779 generate_tap_rules_direction
($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3780 $vmfw_conf, $vmid, 'IN', $ipversion);
3781 generate_tap_rules_direction
($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3782 $vmfw_conf, $vmid, 'OUT', $ipversion);
3785 warn $@ if $@; # just to be sure - should not happen
3788 # generate firewall rules for LXC containers
3789 foreach my $vmid (sort keys %{$vmdata->{lxc
}}) {
3791 my $conf = $vmdata->{lxc
}->{$vmid};
3792 my $vmfw_conf = $vmfw_configs->{$vmid};
3793 return if !$vmfw_conf || !$vmfw_conf->{options
}->{enable
};
3795 foreach my $netid (sort keys %$conf) {
3796 next if $netid !~ m/^net(\d+)$/;
3797 my $net = PVE
::LXC
::Config-
>parse_lxc_network($conf->{$netid});
3798 next if !$net->{firewall
};
3800 my $iface = "veth${vmid}i$1";
3801 my $macaddr = $net->{hwaddr
};
3802 generate_tap_rules_direction
($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3803 $vmfw_conf, $vmid, 'IN', $ipversion);
3804 generate_tap_rules_direction
($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3805 $vmfw_conf, $vmid, 'OUT', $ipversion);
3808 warn $@ if $@; # just to be sure - should not happen
3811 if (ruleset_chain_exist
($ruleset, "PVEFW-IPS")){
3812 ruleset_insertrule
($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3818 sub mac_to_linklocal
{
3820 my @parts = split(/:/, $macaddr);
3821 # The standard link local address uses the fe80::/64 prefix with the
3822 # modified EUI-64 identifier derived from the MAC address by flipping the
3823 # universal/local bit and inserting FF:FE in the middle.
3825 $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3826 my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3827 return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3830 sub compile_ipsets
{
3831 my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3834 if ($cluster_conf->{aliases
}->{local_network
}) {
3835 $localnet = $cluster_conf->{aliases
}->{local_network
}->{cidr
};
3838 ($localnet, $localnet_ver) = parse_ip_or_cidr
(local_network
() || '127.0.0.0/8');
3840 $cluster_conf->{aliases
}->{local_network
} = {
3841 name
=> 'local_network', cidr
=> $localnet, ipversion
=> $localnet_ver };
3844 push @{$cluster_conf->{ipset
}->{management
}}, { cidr
=> $localnet };
3847 my $ipset_ruleset = {};
3849 # generate ipsets for QEMU VMs
3850 foreach my $vmid (keys %{$vmdata->{qemu
}}) {
3852 my $conf = $vmdata->{qemu
}->{$vmid};
3853 my $vmfw_conf = $vmfw_configs->{$vmid};
3854 return if !$vmfw_conf;
3856 # When the 'ipfilter' option is enabled every device for which there
3857 # is no 'ipfilter-netX' ipset defined gets an implicit empty default
3859 # The reason is that ipfilter ipsets are always filled with standard
3860 # IPv6 link-local filters.
3861 my $ipsets = $vmfw_conf->{ipset
};
3862 my $implicit_sets = {};
3864 my $device_ips = {};
3865 foreach my $netid (keys %$conf) {
3866 next if $netid !~ m/^net(\d+)$/;
3867 my $net = PVE
::QemuServer
::parse_net
($conf->{$netid});
3868 next if !$net->{firewall
};
3870 if ($vmfw_conf->{options
}->{ipfilter
} && !$ipsets->{"ipfilter-$netid"}) {
3871 $implicit_sets->{"ipfilter-$netid"} = [];
3874 my $macaddr = $net->{macaddr
};
3875 my $linklocal = mac_to_linklocal
($macaddr);
3876 $device_ips->{$netid} = [
3877 { cidr
=> $linklocal },
3878 { cidr
=> 'fe80::/10', nomatch
=> 1 }
3882 generate_ipset_chains
($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3883 generate_ipset_chains
($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3885 warn $@ if $@; # just to be sure - should not happen
3888 # generate firewall rules for LXC containers
3889 foreach my $vmid (keys %{$vmdata->{lxc
}}) {
3891 my $conf = $vmdata->{lxc
}->{$vmid};
3892 my $vmfw_conf = $vmfw_configs->{$vmid};
3893 return if !$vmfw_conf;
3895 # When the 'ipfilter' option is enabled every device for which there
3896 # is no 'ipfilter-netX' ipset defined gets an implicit empty default
3898 # The reason is that ipfilter ipsets are always filled with standard
3899 # IPv6 link-local filters, as well as the IP addresses configured
3900 # for the container.
3901 my $ipsets = $vmfw_conf->{ipset
};
3902 my $implicit_sets = {};
3904 my $device_ips = {};
3905 foreach my $netid (keys %$conf) {
3906 next if $netid !~ m/^net(\d+)$/;
3907 my $net = PVE
::LXC
::Config-
>parse_lxc_network($conf->{$netid});
3908 next if !$net->{firewall
};
3910 if ($vmfw_conf->{options
}->{ipfilter
} && !$ipsets->{"ipfilter-$netid"}) {
3911 $implicit_sets->{"ipfilter-$netid"} = [];
3914 my $macaddr = $net->{hwaddr
};
3915 my $linklocal = mac_to_linklocal
($macaddr);
3916 my $set = $device_ips->{$netid} = [
3917 { cidr
=> $linklocal },
3918 { cidr
=> 'fe80::/10', nomatch
=> 1 }
3920 if (defined($net->{ip
}) && $net->{ip
} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3921 push @$set, { cidr
=> $1 };
3923 if (defined($net->{ip6
}) && $net->{ip6
} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3924 push @$set, { cidr
=> $1 };
3928 generate_ipset_chains
($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3929 generate_ipset_chains
($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3931 warn $@ if $@; # just to be sure - should not happen
3934 generate_ipset_chains
($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset
});
3936 return $ipset_ruleset;
3939 sub compile_ebtables_filter
{
3940 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata) = @_;
3942 if (!($cluster_conf->{options
}->{ebtables
} // 1)) {
3948 ruleset_create_chain
($ruleset, "PVEFW-FORWARD");
3950 ruleset_create_chain
($ruleset, "PVEFW-FWBR-OUT");
3951 #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED', to speedup rules
3952 ruleset_addrule
($ruleset, 'PVEFW-FORWARD', '-p IPv4', '-j ACCEPT');
3953 ruleset_addrule
($ruleset, 'PVEFW-FORWARD', '-p IPv6', '-j ACCEPT');
3954 ruleset_addrule
($ruleset, 'PVEFW-FORWARD', '-o fwln+', '-j PVEFW-FWBR-OUT');
3956 # generate firewall rules for QEMU VMs
3957 foreach my $vmid (sort keys %{$vmdata->{qemu
}}) {
3959 my $conf = $vmdata->{qemu
}->{$vmid};
3960 my $vmfw_conf = $vmfw_configs->{$vmid};
3961 return if !$vmfw_conf;
3962 my $ipsets = $vmfw_conf->{ipset
};
3964 foreach my $netid (sort keys %$conf) {
3965 next if $netid !~ m/^net(\d+)$/;
3966 my $net = PVE
::QemuServer
::parse_net
($conf->{$netid});
3967 next if !$net->{firewall
};
3968 my $iface = "tap${vmid}i$1";
3969 my $macaddr = $net->{macaddr
};
3971 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3972 foreach my $ipaddr (@$ipset) {
3973 my($ip, $version) = parse_ip_or_cidr
($ipaddr->{cidr
});
3974 next if !$ip || ($version && $version != 4);
3975 push(@$arpfilter, $ip);
3978 generate_tap_layer2filter
($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3981 warn $@ if $@; # just to be sure - should not happen
3984 # generate firewall rules for LXC containers
3985 foreach my $vmid (sort keys %{$vmdata->{lxc
}}) {
3987 my $conf = $vmdata->{lxc
}->{$vmid};
3989 my $vmfw_conf = $vmfw_configs->{$vmid};
3990 return if !$vmfw_conf || !$vmfw_conf->{options
}->{enable
};
3991 my $ipsets = $vmfw_conf->{ipset
};
3993 foreach my $netid (sort keys %$conf) {
3994 next if $netid !~ m/^net(\d+)$/;
3995 my $net = PVE
::LXC
::Config-
>parse_lxc_network($conf->{$netid});
3996 next if !$net->{firewall
};
3997 my $iface = "veth${vmid}i$1";
3998 my $macaddr = $net->{hwaddr
};
4000 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
4001 foreach my $ipaddr (@$ipset) {
4002 my($ip, $version) = parse_ip_or_cidr
($ipaddr->{cidr
});
4003 next if !$ip || ($version && $version != 4);
4004 push(@$arpfilter, $ip);
4007 if (defined(my $ip = $net->{ip
}) && $vmfw_conf->{options
}->{ipfilter
}) {
4008 # ebtables changes this to a .0/MASK network but we just
4009 # want the address here, no network - see #2193
4011 if ($ip ne 'dhcp') {
4012 push @$arpfilter, $ip;
4015 generate_tap_layer2filter
($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
4018 warn $@ if $@; # just to be sure - should not happen
4024 sub generate_tap_layer2filter
{
4025 my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter) = @_;
4026 my $options = $vmfw_conf->{options
};
4028 my $tapchain = $iface."-OUT";
4030 # ebtables remove zeros from mac pairs
4031 $macaddr =~ s/0([0-9a-f])/$1/ig;
4032 $macaddr = lc($macaddr);
4034 ruleset_create_chain
($ruleset, $tapchain);
4036 if (defined($macaddr) && !(defined($options->{macfilter
}) && $options->{macfilter
} == 0)) {
4037 ruleset_addrule
($ruleset, $tapchain, "-s ! $macaddr", '-j DROP');
4041 my $arpchain = $tapchain."-ARP";
4042 ruleset_addrule
($ruleset, $tapchain, "-p ARP", "-j $arpchain");
4043 ruleset_create_chain
($ruleset, $arpchain);
4045 foreach my $ip (@{$arpfilter}) {
4046 ruleset_addrule
($ruleset, $arpchain, "-p ARP --arp-ip-src $ip", '-j RETURN');
4048 ruleset_addrule
($ruleset, $arpchain, '', '-j DROP');
4051 if (defined($options->{layer2_protocols
})){
4052 my $protochain = $tapchain."-PROTO";
4053 ruleset_addrule
($ruleset, $tapchain, '', "-j $protochain");
4054 ruleset_create_chain
($ruleset, $protochain);
4056 foreach my $proto (split(/,/, $options->{layer2_protocols
})) {
4057 ruleset_addrule
($ruleset, $protochain, "-p $proto", '-j RETURN');
4059 ruleset_addrule
($ruleset, $protochain, '', '-j DROP');
4062 ruleset_addrule
($ruleset, $tapchain, '', '-j ACCEPT');
4064 ruleset_addrule
($ruleset, 'PVEFW-FWBR-OUT', "-i $iface", "-j $tapchain");
4067 # the parameter $change_only_regex changes two things if defined:
4068 # * all chains not matching it will be left intact
4069 # * both the $active_chains hash and the returned status_hash have different
4070 # structure (they contain a key named 'rules').
4071 sub get_ruleset_status
{
4072 my ($ruleset, $active_chains, $digest_fn, $change_only_regex) = @_;
4074 my $statushash = {};
4076 foreach my $chain (sort keys %$ruleset) {
4077 my $rules = $ruleset->{$chain};
4078 my $sig = &$digest_fn($rules);
4081 $statushash->{$chain}->{sig
} = $sig;
4082 if (defined($change_only_regex)) {
4083 $oldsig = $active_chains->{$chain}->{sig
};
4084 $statushash->{$chain}->{rules
} = $rules;
4086 $oldsig = $active_chains->{$chain};
4088 if (!defined($oldsig)) {
4089 $statushash->{$chain}->{action
} = 'create';
4091 if ($oldsig eq $sig) {
4092 $statushash->{$chain}->{action
} = 'exists';
4094 $statushash->{$chain}->{action
} = 'update';
4098 print "$statushash->{$chain}->{action} $chain ($sig)\n";
4099 foreach my $cmd (@{$rules}) {
4105 foreach my $chain (sort keys %$active_chains) {
4106 next if defined($ruleset->{$chain});
4107 my $action = 'delete';
4108 my $sig = $active_chains->{$chain};
4109 if (defined($change_only_regex)) {
4110 $action = 'ignore' if ($chain !~ m/$change_only_regex/);
4111 $statushash->{$chain}->{rules
} = $active_chains->{$chain}->{rules
};
4112 $statushash->{$chain}->{policy
} = $active_chains->{$chain}->{policy
};
4115 $statushash->{$chain}->{action
} = $action;
4116 $statushash->{$chain}->{sig
} = $sig;
4117 print "$action $chain ($sig)\n" if $verbose;
4123 sub print_sig_rule
{
4124 my ($chain, $sig) = @_;
4126 # We just use this to store a SHA1 checksum used to detect changes
4127 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
4130 sub get_ruleset_cmdlist {
4131 my ($ruleset, $iptablescmd, $table) = @_;
4133 $table = 'filter' if !$table;
4135 my $cmdlist = "*$table\n"; # we pass this to iptables-restore;
4137 my ($active_chains, $hooks) = iptables_get_chains($iptablescmd, $table);
4138 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
4140 # create missing chains first
4141 foreach my $chain (sort keys %$ruleset) {
4142 my $stat = $statushash->{$chain};
4143 die "internal error
" if !$stat;
4144 next if $stat->{action} ne 'create';
4146 $cmdlist .= ":$chain - [0:0]\n";
4149 foreach my $h (qw(INPUT OUTPUT FORWARD PREROUTING)) {
4150 my $chain = "PVEFW-$h";
4151 if ($ruleset->{$chain} && !$hooks->{$h}) {
4152 $cmdlist .= "-A $h -j $chain\n";
4156 foreach my $chain (sort keys %$ruleset) {
4157 my $stat = $statushash->{$chain};
4158 die "internal error" if !$stat;
4160 if ($stat->{action
} eq 'update' || $stat->{action
} eq 'create') {
4161 $cmdlist .= "-F $chain\n";
4162 foreach my $cmd (@{$ruleset->{$chain}}) {
4163 $cmdlist .= "$cmd\n";
4165 $cmdlist .= print_sig_rule
($chain, $stat->{sig
});
4166 } elsif ($stat->{action
} eq 'delete') {
4167 die "internal error"; # this should not happen
4168 } elsif ($stat->{action
} eq 'exists') {
4171 die "internal error - unknown status '$stat->{action}'";
4175 foreach my $chain (keys %$statushash) {
4176 next if $statushash->{$chain}->{action
} ne 'delete';
4177 $cmdlist .= "-F $chain\n";
4179 foreach my $chain (keys %$statushash) {
4180 next if $statushash->{$chain}->{action
} ne 'delete';
4181 next if $chain eq 'PVEFW-INPUT';
4182 next if $chain eq 'PVEFW-OUTPUT';
4183 next if $chain eq 'PVEFW-FORWARD';
4184 next if $chain eq 'PVEFW-PREROUTING';
4185 $cmdlist .= "-X $chain\n";
4188 my $changes = $cmdlist ne "*$table\n" ?
1 : 0;
4190 $cmdlist .= "COMMIT\n";
4192 return wantarray ?
($cmdlist, $changes) : $cmdlist;
4195 my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tap|veth)\d+i\d+-(?:IN|OUT)/;
4197 sub get_ebtables_cmdlist
{
4201 my $cmdlist = "*filter\n";
4203 my $active_chains = ebtables_get_chains
();
4204 my $statushash = get_ruleset_status
($ruleset, $active_chains,
4205 \
&iptables_chain_digest
,
4206 $pve_ebtables_chainname_regex);
4208 # create chains first and make sure PVE rules are evaluated if active
4209 my $append_pve_to_forward = '-A FORWARD -j PVEFW-FORWARD';
4210 my $pve_include = 0;
4211 foreach my $chain (sort keys %$statushash) {
4212 next if ($statushash->{$chain}->{action
} eq 'delete');
4213 my $policy = $statushash->{$chain}->{policy
} // 'ACCEPT';
4214 $cmdlist .= ":$chain $policy\n";
4215 $pve_include = 1 if ($chain eq 'PVEFW-FORWARD');
4218 foreach my $chain (sort keys %$statushash) {
4219 my $stat = $statushash->{$chain};
4220 $changes = 1 if ($stat->{action
} !~ 'ignore|exists');
4221 next if ($stat->{action
} eq 'delete');
4223 foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
4224 if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
4225 next if ! $pve_include;
4228 $cmdlist .= "$cmd\n";
4231 $cmdlist .= "$append_pve_to_forward\n" if $pve_include;
4233 return wantarray ?
($cmdlist, $changes) : $cmdlist;
4236 sub get_ipset_cmdlist
{
4241 my $delete_cmdlist = "";
4243 my $active_chains = ipset_get_chains
();
4244 my $statushash = get_ruleset_status
($ruleset, $active_chains, \
&ipset_chain_digest
);
4246 # remove stale _swap chains
4247 foreach my $chain (keys %$active_chains) {
4248 if ($chain =~ m/^PVEFW-\S+_swap$/) {
4249 $cmdlist .= "destroy $chain\n";
4253 foreach my $chain (keys %$ruleset) {
4254 my $stat = $statushash->{$chain};
4255 die "internal error" if !$stat;
4257 if ($stat->{action
} eq 'create') {
4258 foreach my $cmd (@{$ruleset->{$chain}}) {
4259 $cmdlist .= "$cmd\n";
4264 foreach my $chain (keys %$ruleset) {
4265 my $stat = $statushash->{$chain};
4266 die "internal error" if !$stat;
4268 if ($stat->{action
} eq 'update') {
4269 my $chain_swap = $chain."_swap";
4271 foreach my $cmd (@{$ruleset->{$chain}}) {
4272 $cmd =~ s/$chain/$chain_swap/;
4273 $cmdlist .= "$cmd\n";
4275 $cmdlist .= "swap $chain_swap $chain\n";
4276 $cmdlist .= "flush $chain_swap\n";
4277 $cmdlist .= "destroy $chain_swap\n";
4281 # the remove unused chains
4282 foreach my $chain (keys %$statushash) {
4283 next if $statushash->{$chain}->{action
} ne 'delete';
4285 $delete_cmdlist .= "flush $chain\n";
4286 $delete_cmdlist .= "destroy $chain\n";
4289 my $changes = ($cmdlist || $delete_cmdlist) ?
1 : 0;
4291 return ($cmdlist, $delete_cmdlist, $changes);
4295 my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = @_;
4297 enable_bridge_firewall
();
4299 my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
4300 get_ipset_cmdlist
($ipset_ruleset);
4302 my ($cmdlist, $changes) = get_ruleset_cmdlist
($ruleset->{filter
});
4303 my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist
($rulesetv6->{filter
}, "ip6tables");
4304 my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist
($ebtables_ruleset);
4305 my ($cmdlist_raw, $changes_raw) = get_ruleset_cmdlist
($ruleset->{raw
}, undef, 'raw');
4306 my ($cmdlistv6_raw, $changesv6_raw) = get_ruleset_cmdlist
($rulesetv6->{raw
}, "ip6tables", 'raw');
4309 if ($ipset_changes) {
4310 print "ipset changes:\n";
4311 print $ipset_create_cmdlist if $ipset_create_cmdlist;
4312 print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
4316 print "iptables changes:\n";
4321 print "ip6tables changes:\n";
4326 print "iptables table raw changes:\n";
4330 if ($changesv6_raw) {
4331 print "ip6tables table raw changes:\n";
4332 print $cmdlistv6_raw;
4335 if ($ebtables_changes) {
4336 print "ebtables changes:\n";
4337 print $ebtables_cmdlist;
4341 my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
4342 PVE
::Tools
::file_set_contents
($tmpfile, $ipset_create_cmdlist || '');
4344 ipset_restore_cmdlist
($ipset_create_cmdlist);
4346 $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
4347 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlist || '');
4349 iptables_restore_cmdlist
($cmdlist);
4351 $tmpfile = "$pve_fw_status_dir/ip4cmdlistraw";
4352 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlist_raw || '');
4354 iptables_restore_cmdlist
($cmdlist_raw, 'raw');
4356 $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
4357 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlistv6 || '');
4359 ip6tables_restore_cmdlist
($cmdlistv6);
4361 $tmpfile = "$pve_fw_status_dir/ip6cmdlistraw";
4362 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlistv6_raw || '');
4364 ip6tables_restore_cmdlist
($cmdlistv6_raw, 'raw');
4366 $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
4367 PVE
::Tools
::file_set_contents
($tmpfile, $ipset_delete_cmdlist || '');
4369 ipset_restore_cmdlist
($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
4371 ebtables_restore_cmdlist
($ebtables_cmdlist);
4373 $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
4374 PVE
::Tools
::file_set_contents
($tmpfile, $ebtables_cmdlist || '');
4376 # test: re-read status and check if everything is up to date
4377 my $ruleset_filter = $ruleset->{filter
};
4378 my $active_chains = iptables_get_chains
();
4379 my $statushash = get_ruleset_status
($ruleset_filter, $active_chains, \
&iptables_chain_digest
);
4382 foreach my $chain (sort keys %$ruleset_filter) {
4383 my $stat = $statushash->{$chain};
4384 if ($stat->{action
} ne 'exists') {
4385 warn "unable to update chain '$chain'\n";
4390 my $rulesetv6_filter = $rulesetv6->{filter
};
4391 my $active_chainsv6 = iptables_get_chains
("ip6tables");
4392 my $statushashv6 = get_ruleset_status
($rulesetv6_filter, $active_chainsv6, \
&iptables_chain_digest
);
4394 foreach my $chain (sort keys %$rulesetv6_filter) {
4395 my $stat = $statushashv6->{$chain};
4396 if ($stat->{action
} ne 'exists') {
4397 warn "unable to update chain '$chain'\n";
4402 my $ruleset_raw = $ruleset->{raw
};
4403 my $active_chains_raw = iptables_get_chains
(undef, 'raw');
4404 my $statushash_raw = get_ruleset_status
($ruleset_raw, $active_chains_raw, \
&iptables_chain_digest
);
4406 foreach my $chain (sort keys %$ruleset_raw) {
4407 my $stat = $statushash_raw->{$chain};
4408 if ($stat->{action
} ne 'exists') {
4409 warn "unable to update chain '$chain'\n";
4414 my $rulesetv6_raw = $rulesetv6->{raw
};
4415 my $active_chainsv6_raw = iptables_get_chains
("ip6tables", 'raw');
4416 my $statushashv6_raw = get_ruleset_status
($rulesetv6_raw, $active_chainsv6_raw, \
&iptables_chain_digest
);
4418 foreach my $chain (sort keys %$rulesetv6_raw) {
4419 my $stat = $statushashv6_raw->{$chain};
4420 if ($stat->{action
} ne 'exists') {
4421 warn "unable to update chain '$chain'\n";
4426 my $active_ebtables_chains = ebtables_get_chains
();
4427 my $ebtables_statushash = get_ruleset_status
($ebtables_ruleset,
4428 $active_ebtables_chains, \
&iptables_chain_digest
,
4429 $pve_ebtables_chainname_regex);
4431 foreach my $chain (sort keys %$ebtables_ruleset) {
4432 my $stat = $ebtables_statushash->{$chain};
4433 if ($stat->{action
} ne 'exists') {
4434 warn "ebtables : unable to update chain '$chain'\n";
4439 die "unable to apply firewall changes\n" if $errors;
4441 update_nf_conntrack_max
($hostfw_conf);
4443 update_nf_conntrack_tcp_timeout_established
($hostfw_conf);
4445 update_nf_conntrack_tcp_timeout_syn_recv
($hostfw_conf);
4447 update_nf_conntrack_logging
($hostfw_conf);
4450 sub update_nf_conntrack_max
{
4451 my ($hostfw_conf) = @_;
4453 my $max = 262144; # reasonable default (2^16 * 4), see nf_conntrack-sysctl docs
4455 my $options = $hostfw_conf->{options
} || {};
4457 if (defined($options->{nf_conntrack_max
}) && ($options->{nf_conntrack_max
} > $max)) {
4458 $max = $options->{nf_conntrack_max
};
4459 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
4462 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
4463 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
4465 my $current = int(PVE
::Tools
::file_read_firstline
($filename_nf_conntrack_max) || $max);
4467 if ($current != $max) {
4468 my $hashsize = int($max/4);
4469 PVE
::ProcFSTools
::write_proc_entry
($filename_hashsize, $hashsize);
4470 PVE
::ProcFSTools
::write_proc_entry
($filename_nf_conntrack_max, $max);
4474 sub update_nf_conntrack_tcp_timeout_established
{
4475 my ($hostfw_conf) = @_;
4477 my $options = $hostfw_conf->{options
} || {};
4479 my $value = defined($options->{nf_conntrack_tcp_timeout_established
}) ?
$options->{nf_conntrack_tcp_timeout_established
} : 432000;
4481 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
4484 sub update_nf_conntrack_tcp_timeout_syn_recv
{
4485 my ($hostfw_conf) = @_;
4487 my $options = $hostfw_conf->{options
} || {};
4489 my $value = defined($options->{nf_conntrack_tcp_timeout_syn_recv
}) ?
$options->{nf_conntrack_tcp_timeout_syn_recev
} : 60;
4491 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_syn_recv", $value);
4494 my $log_nf_conntrack_enabled = undef;
4495 sub update_nf_conntrack_logging
{
4496 my ($hostfw_conf) = @_;
4498 my $options = $hostfw_conf->{options
} || {};
4499 my $value = $options->{log_nf_conntrack
} || 0;
4500 if (!defined($log_nf_conntrack_enabled)
4501 || $value != $log_nf_conntrack_enabled)
4503 my $tmpfile = "$pve_fw_status_dir/log_nf_conntrack";
4504 PVE
::Tools
::file_set_contents
($tmpfile, $value);
4506 run_command
([qw(systemctl try-reload-or-restart pvefw-logger.service)]);
4507 $log_nf_conntrack_enabled = $value;
4511 sub remove_pvefw_chains
{
4513 PVE
::Firewall
::remove_pvefw_chains_iptables
("iptables");
4514 PVE
::Firewall
::remove_pvefw_chains_iptables
("ip6tables");
4515 PVE
::Firewall
::remove_pvefw_chains_iptables
("iptables", "raw");
4516 PVE
::Firewall
::remove_pvefw_chains_iptables
("ip6tables", "raw");
4517 PVE
::Firewall
::remove_pvefw_chains_ipset
();
4518 PVE
::Firewall
::remove_pvefw_chains_ebtables
();
4522 sub remove_pvefw_chains_iptables
{
4523 my ($iptablescmd, $table) = @_;
4525 $table = 'filter' if !$table;
4527 my ($chash, $hooks) = iptables_get_chains
($iptablescmd, $table);
4528 my $cmdlist = "*$table\n";
4530 foreach my $h (qw(INPUT OUTPUT FORWARD PREROUTING)) {
4532 $cmdlist .= "-D $h -j PVEFW-$h\n";
4536 foreach my $chain (keys %$chash) {
4537 $cmdlist .= "-F $chain\n";
4540 foreach my $chain (keys %$chash) {
4541 $cmdlist .= "-X $chain\n";
4543 $cmdlist .= "COMMIT\n";
4545 if($iptablescmd eq "ip6tables") {
4546 ip6tables_restore_cmdlist
($cmdlist, $table);
4548 iptables_restore_cmdlist
($cmdlist, $table);
4552 sub remove_pvefw_chains_ipset
{
4554 my $ipset_chains = ipset_get_chains
();
4558 foreach my $chain (keys %$ipset_chains) {
4559 $cmdlist .= "flush $chain\n";
4560 $cmdlist .= "destroy $chain\n";
4563 ipset_restore_cmdlist
($cmdlist) if $cmdlist;
4566 sub remove_pvefw_chains_ebtables
{
4567 # apply empty ruleset = remove all our chains
4568 ebtables_restore_cmdlist
(get_ebtables_cmdlist
({}));
4572 my $cluster_conf = load_clusterfw_conf
();
4573 my $cluster_options = $cluster_conf->{options
};
4574 my $enable = $cluster_options->{enable
};
4578 # load required modules here
4584 my $cluster_conf = load_clusterfw_conf
();
4585 my $cluster_options = $cluster_conf->{options
};
4587 if (!$cluster_options->{enable
}) {
4588 PVE
::Firewall
::remove_pvefw_chains
();
4592 my $hostfw_conf = load_hostfw_conf
($cluster_conf);
4594 my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile
($cluster_conf, $hostfw_conf);
4596 apply_ruleset
($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);