13 use Socket
qw(AF_INET AF_INET6 inet_ntop inet_pton);
14 use Storable
qw(dclone);
18 use PVE
::Exception
qw(raise raise_param_exc);
20 use PVE
::JSONSchema
qw(register_standard_option get_standard_option);
24 use PVE
::Tools
qw($IPV4RE $IPV6RE);
25 use PVE
::Tools
qw(run_command lock_file dir_glob_foreach);
27 my $pvefw_conf_dir = "/etc/pve/firewall";
28 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
30 # dynamically include PVE::QemuServer and PVE::LXC
31 # to avoid dependency problems
34 require PVE
::QemuServer
;
35 require PVE
::QemuConfig
;
36 $have_qemu_server = 1;
45 my $pve_fw_status_dir = "/var/lib/pve-firewall";
47 mkdir $pve_fw_status_dir; # make sure this exists
49 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
50 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
51 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
53 my $max_alias_name_length = 64;
54 my $max_ipset_name_length = 64;
55 my $max_group_name_length = 18;
57 my $PROTOCOLS_WITH_PORTS = {
59 udplite
=> 1, 136 => 1,
65 PVE
::JSONSchema
::register_format
('IPorCIDR', \
&pve_verify_ip_or_cidr
);
66 sub pve_verify_ip_or_cidr
{
67 my ($cidr, $noerr) = @_;
69 if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
70 return $cidr if Net
::IP-
>new($cidr);
71 return undef if $noerr;
72 die Net
::IP
::Error
() . "\n";
74 return undef if $noerr;
75 die "value does not look like a valid IP address or CIDR network\n";
78 PVE
::JSONSchema
::register_format
('IPorCIDRorAlias', \
&pve_verify_ip_or_cidr_or_alias
);
79 sub pve_verify_ip_or_cidr_or_alias
{
80 my ($cidr, $noerr) = @_;
82 return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
84 return pve_verify_ip_or_cidr
($cidr, $noerr);
87 PVE
::JSONSchema
::register_standard_option
('ipset-name', {
88 description
=> "IP set name.",
90 pattern
=> $ipset_name_pattern,
92 maxLength
=> $max_ipset_name_length,
95 PVE
::JSONSchema
::register_standard_option
('pve-fw-alias', {
96 description
=> "Alias name.",
98 pattern
=> $ip_alias_pattern,
100 maxLength
=> $max_alias_name_length,
103 PVE
::JSONSchema
::register_standard_option
('pve-fw-loglevel' => {
104 description
=> "Log level.",
106 enum
=> ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
110 PVE
::JSONSchema
::register_standard_option
('pve-security-group-name', {
111 description
=> "Security Group name.",
113 pattern
=> $security_group_name_pattern,
115 maxLength
=> $max_group_name_length,
118 my $feature_ipset_nomatch = 0;
120 my (undef, undef, $release) = POSIX
::uname
();
121 if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
122 my ($major, $minor) = ($1, $2);
123 $feature_ipset_nomatch = 1 if ($major > 3) ||
124 ($major == 3 && $minor >= 7);
129 my $nodename = PVE
::INotify
::nodename
();
130 my $hostfw_conf_filename = "/etc/pve/nodes/$nodename/host.fw";
132 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
134 my $default_log_level = 'nolog'; # avoid logs by default
135 my $global_log_ratelimit = '--limit 1/sec';
137 my $log_level_hash = {
159 # sport => port[,port[,port]].. or port:port
160 # dport => port[,port[,port]].. or port:port
161 # log => optional, loglevel
162 # logmsg => optional, logmsg - overwrites default
163 # iface_in => incomin interface
164 # iface_out => outgoing interface
165 # match => optional, overwrites generation of match
166 # target => optional, overwrites action
168 # we need to overwrite some macros for ipv6
169 my $pve_ipv6fw_macros = {
171 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'echo-request' },
173 'NeighborDiscovery' => [
174 "IPv6 neighbor solicitation, neighbor and router advertisement",
175 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'router-solicitation' },
176 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'router-advertisement' },
177 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'neighbor-solicitation' },
178 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'neighbor-advertisement' },
182 { action
=> 'PARAM', proto
=> 'udp', dport
=> '546:547', sport
=> '546:547' },
185 { action
=> 'PARAM', proto
=> 'udp', dport
=> '33434:33524' },
186 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'echo-request' },
190 # imported/converted from: /usr/share/shorewall/macro.*
191 my $pve_fw_macros = {
194 { action
=> 'PARAM', proto
=> 'udp', dport
=> '10080' },
195 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10080' },
198 "Auth (identd) traffic",
199 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '113' },
202 "Border Gateway Protocol traffic",
203 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '179' },
206 "BitTorrent traffic for BitTorrent 3.1 and earlier",
207 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6889' },
208 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
211 "BitTorrent traffic for BitTorrent 3.2 and later",
212 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6999' },
213 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
216 "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
217 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6789' },
218 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6800:7300' },
221 "Concurrent Versions System pserver traffic",
222 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2401' },
225 "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
226 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1494' },
227 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1604' },
228 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2598' },
231 "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
232 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3689' },
233 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3689' },
236 "Distributed Checksum Clearinghouse spam filtering mechanism",
237 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6277' },
240 "Forwarded DHCP traffic",
241 { action
=> 'PARAM', proto
=> 'udp', dport
=> '67:68', sport
=> '67:68' },
244 "Domain Name System traffic (upd and tcp)",
245 { action
=> 'PARAM', proto
=> 'udp', dport
=> '53' },
246 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '53' },
249 "Distributed Compiler service",
250 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3632' },
253 "File Transfer Protocol",
254 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '21' },
257 "Finger protocol (RFC 742)",
258 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '79' },
261 "GNUnet secure peer-to-peer networking traffic",
262 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2086' },
263 { action
=> 'PARAM', proto
=> 'udp', dport
=> '2086' },
264 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1080' },
265 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1080' },
268 "Generic Routing Encapsulation tunneling protocol",
269 { action
=> 'PARAM', proto
=> '47' },
272 "Git distributed revision control traffic",
273 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9418' },
276 "OpenPGP HTTP keyserver protocol traffic",
277 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '11371' },
280 "Hypertext Transfer Protocol (WWW)",
281 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
284 "Hypertext Transfer Protocol (WWW) over SSL",
285 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
288 "Internet Cache Protocol V2 (Squid) traffic",
289 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3130' },
292 "AOL Instant Messenger traffic",
293 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5190' },
296 "Internet Message Access Protocol",
297 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '143' },
300 "Internet Message Access Protocol over SSL",
301 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '993' },
304 "IPIP capsulation traffic",
305 { action
=> 'PARAM', proto
=> '94' },
309 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
310 { action
=> 'PARAM', proto
=> '50' },
313 "IPsec authentication (AH) traffic",
314 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
315 { action
=> 'PARAM', proto
=> '51' },
318 "IPsec traffic and Nat-Traversal",
319 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500' },
320 { action
=> 'PARAM', proto
=> 'udp', dport
=> '4500' },
321 { action
=> 'PARAM', proto
=> '50' },
324 "Internet Relay Chat traffic",
325 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6667' },
328 "HP Jetdirect printing",
329 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9100' },
332 "Layer 2 Tunneling Protocol traffic",
333 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1701' },
336 "Lightweight Directory Access Protocol traffic",
337 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '389' },
340 "Secure Lightweight Directory Access Protocol traffic",
341 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '636' },
344 "Microsoft Notification Protocol",
345 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1863' },
348 "Microsoft SQL Server",
349 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1433' },
352 "Mail traffic (SMTP, SMTPS, Submission)",
353 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
354 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
355 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
359 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5353' },
362 "Munin networked resource monitoring traffic",
363 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '4949' },
367 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3306' },
370 "NNTP traffic (Usenet).",
371 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '119' },
374 "Encrypted NNTP traffic (Usenet)",
375 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '563' },
378 "Network Time Protocol (ntpd)",
379 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
382 "OSPF multicast traffic",
383 { action
=> 'PARAM', proto
=> '89' },
387 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1194' },
390 "Symantec PCAnywere (tm)",
391 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5632' },
392 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5631' },
396 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '110' },
399 "Encrypted POP3 traffic",
400 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '995' },
403 "Point-to-Point Tunneling Protocol",
404 { action
=> 'PARAM', proto
=> '47' },
405 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1723' },
409 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
413 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5432' },
416 "Line Printer protocol printing",
417 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '515' },
420 "Microsoft Remote Desktop Protocol traffic",
421 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3389' },
424 "Routing Information Protocol (bidirectional)",
425 { action
=> 'PARAM', proto
=> 'udp', dport
=> '520' },
428 "BIND remote management protocol",
429 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '953' },
432 "Razor Antispam System",
433 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2703' },
436 "Remote time retrieval (rdate)",
437 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
441 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '873' },
444 "SANE network scanning",
445 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6566' },
448 "Microsoft SMB traffic",
449 { action
=> 'PARAM', proto
=> 'udp', dport
=> '135,445' },
450 { action
=> 'PARAM', proto
=> 'udp', dport
=> '137:139' },
451 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
452 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '135,139,445' },
455 "Samba Web Administration Tool",
456 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '901' },
459 "Simple Mail Transfer Protocol",
460 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
463 "Encrypted Simple Mail Transfer Protocol",
464 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
467 "Simple Network Management Protocol",
468 { action
=> 'PARAM', proto
=> 'udp', dport
=> '161:162' },
469 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '161' },
472 "Spam Assassin SPAMD traffic",
473 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '783' },
476 "Secure shell traffic",
477 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '22' },
480 "Subversion server (svnserve)",
481 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3690' },
484 "SixXS IPv6 Deployment and Tunnel Broker",
485 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3874' },
486 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3740' },
487 { action
=> 'PARAM', proto
=> '41' },
488 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5072,8374' },
491 "Squid web proxy traffic",
492 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3128' },
495 "Mail message submission traffic",
496 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
499 "Syslog protocol (RFC 5424) traffic",
500 { action
=> 'PARAM', proto
=> 'udp', dport
=> '514' },
501 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '514' },
504 "Trivial File Transfer Protocol traffic",
505 { action
=> 'PARAM', proto
=> 'udp', dport
=> '69' },
509 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '23' },
513 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '992' },
516 "RFC 868 Time protocol",
517 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
520 "Traceroute (for up to 30 hops) traffic",
521 { action
=> 'PARAM', proto
=> 'udp', dport
=> '33434:33524' },
522 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
525 "VNC traffic for VNC display's 0 - 99",
526 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5900:5999' },
529 "VNC traffic from Vncservers to Vncviewers in listen mode",
530 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5500' },
533 "WWW traffic (HTTP and HTTPS)",
534 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
535 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
538 "Web Cache/Proxy traffic (port 8080)",
539 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '8080' },
543 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10000' },
546 "Whois (nicname, RFC 3912) traffic",
547 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '43' },
551 my $pve_fw_parsed_macros;
552 my $pve_fw_macro_descr;
553 my $pve_fw_macro_ipversion = {};
554 my $pve_fw_preferred_macro_names = {};
556 my $FWACCEPTMARK_ON = "0x80000000/0x80000000";
557 my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
559 my $pve_std_chains = {};
560 my $pve_std_chains_conf = {};
561 $pve_std_chains_conf->{4} = {
562 'PVEFW-SET-ACCEPT-MARK' => [
563 { target
=> "-j MARK --set-mark $FWACCEPTMARK_ON" },
565 'PVEFW-DropBroadcast' => [
566 # same as shorewall 'Broadcast'
567 # simply DROP BROADCAST/MULTICAST/ANYCAST
568 # we can use this to reduce logging
569 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
570 { action
=> 'DROP', dsttype
=> 'MULTICAST' },
571 { action
=> 'DROP', dsttype
=> 'ANYCAST' },
572 { action
=> 'DROP', dest
=> '224.0.0.0/4' },
575 # same as shorewall 'reject'
576 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
577 { action
=> 'DROP', source
=> '224.0.0.0/4' },
578 { action
=> 'DROP', proto
=> 'icmp' },
579 { match
=> '-p tcp', target
=> '-j REJECT --reject-with tcp-reset' },
580 { match
=> '-p udp', target
=> '-j REJECT --reject-with icmp-port-unreachable' },
581 { match
=> '-p icmp', target
=> '-j REJECT --reject-with icmp-host-unreachable' },
582 { target
=> '-j REJECT --reject-with icmp-host-prohibited' },
585 # same as shorewall 'Drop', which is equal to DROP,
586 # but REJECT/DROP some packages to reduce logging,
587 # and ACCEPT critical ICMP types
588 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
589 # we are not interested in BROADCAST/MULTICAST/ANYCAST
590 { action
=> 'PVEFW-DropBroadcast' },
591 # ACCEPT critical ICMP types
592 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
593 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
594 # Drop packets with INVALID state
595 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
596 # Drop Microsoft SMB noise
597 { action
=> 'DROP', proto
=> 'udp', dport
=> '135,445' },
598 { action
=> 'DROP', proto
=> 'udp', dport
=> '137:139' },
599 { action
=> 'DROP', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
600 { action
=> 'DROP', proto
=> 'tcp', dport
=> '135,139,445' },
601 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
602 # Drop new/NotSyn traffic so that it doesn't get logged
603 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
605 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
608 # same as shorewall 'Reject', which is equal to Reject,
609 # but REJECT/DROP some packages to reduce logging,
610 # and ACCEPT critical ICMP types
611 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
612 # we are not interested in BROADCAST/MULTICAST/ANYCAST
613 { action
=> 'PVEFW-DropBroadcast' },
614 # ACCEPT critical ICMP types
615 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
616 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
617 # Drop packets with INVALID state
618 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
619 # Drop Microsoft SMB noise
620 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '135,445' },
621 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '137:139'},
622 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
623 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '135,139,445' },
624 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
625 # Drop new/NotSyn traffic so that it doesn't get logged
626 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
628 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
630 'PVEFW-tcpflags' => [
631 # same as shorewall tcpflags action.
632 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
633 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target
=> '-g PVEFW-logflags' },
634 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target
=> '-g PVEFW-logflags' },
635 { match
=> '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target
=> '-g PVEFW-logflags' },
636 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target
=> '-g PVEFW-logflags' },
637 { match
=> '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target
=> '-g PVEFW-logflags' },
640 # same as shorewall smurfs action
641 # Filter packets for smurfs (packets with a broadcast address as the source).
642 { match
=> '-s 0.0.0.0/32', target
=> '-j RETURN' }, # allow DHCP
643 { match
=> '-m addrtype --src-type BROADCAST', target
=> '-g PVEFW-smurflog' },
644 { match
=> '-s 224.0.0.0/4', target
=> '-g PVEFW-smurflog' },
646 'PVEFW-smurflog' => [
647 { action
=> 'DROP', logmsg
=> 'DROP: ' },
649 'PVEFW-logflags' => [
650 { action
=> 'DROP', logmsg
=> 'DROP: ' },
654 $pve_std_chains_conf->{6} = {
655 'PVEFW-SET-ACCEPT-MARK' => [
656 { target
=> "-j MARK --set-mark $FWACCEPTMARK_ON" },
658 'PVEFW-DropBroadcast' => [
659 # same as shorewall 'Broadcast'
660 # simply DROP BROADCAST/MULTICAST/ANYCAST
661 # we can use this to reduce logging
662 #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
663 # ipv6 addrtype does not work with kernel 2.6.32
664 #{ action => 'DROP', dsttype => 'MULTICAST' },
665 #{ action => 'DROP', dsttype => 'ANYCAST' },
666 { action
=> 'DROP', dest
=> 'ff00::/8' },
667 #{ action => 'DROP', dest => '224.0.0.0/4' },
670 { action
=> 'DROP', proto
=> 'icmpv6' },
671 { match
=> '-p tcp', target
=> '-j REJECT --reject-with tcp-reset' },
672 { match
=> '-p udp', target
=> '-j REJECT --reject-with icmp6-port-unreachable' },
673 { target
=> '-j REJECT --reject-with icmp6-adm-prohibited' },
676 # same as shorewall 'Drop', which is equal to DROP,
677 # but REJECT/DROP some packages to reduce logging,
678 # and ACCEPT critical ICMP types
679 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
680 # we are not interested in BROADCAST/MULTICAST/ANYCAST
681 { action
=> 'PVEFW-DropBroadcast' },
682 # ACCEPT critical ICMP types
683 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'destination-unreachable' },
684 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'time-exceeded' },
685 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'packet-too-big' },
686 # Drop packets with INVALID state
687 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
688 # Drop Microsoft SMB noise
689 { action
=> 'DROP', proto
=> 'udp', dport
=> '135,445' },
690 { action
=> 'DROP', proto
=> 'udp', dport
=> '137:139'},
691 { action
=> 'DROP', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
692 { action
=> 'DROP', proto
=> 'tcp', dport
=> '135,139,445' },
693 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
694 # Drop new/NotSyn traffic so that it doesn't get logged
695 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
697 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
700 # same as shorewall 'Reject', which is equal to Reject,
701 # but REJECT/DROP some packages to reduce logging,
702 # and ACCEPT critical ICMP types
703 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
704 # we are not interested in BROADCAST/MULTICAST/ANYCAST
705 { action
=> 'PVEFW-DropBroadcast' },
706 # ACCEPT critical ICMP types
707 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'destination-unreachable' },
708 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'time-exceeded' },
709 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'packet-too-big' },
710 # Drop packets with INVALID state
711 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
712 # Drop Microsoft SMB noise
713 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '135,445' },
714 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '137:139' },
715 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
716 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '135,139,445' },
717 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
718 # Drop new/NotSyn traffic so that it doesn't get logged
719 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
721 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
723 'PVEFW-tcpflags' => [
724 # same as shorewall tcpflags action.
725 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
726 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target
=> '-g PVEFW-logflags' },
727 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target
=> '-g PVEFW-logflags' },
728 { match
=> '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target
=> '-g PVEFW-logflags' },
729 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target
=> '-g PVEFW-logflags' },
730 { match
=> '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target
=> '-g PVEFW-logflags' },
732 'PVEFW-logflags' => [
733 { action
=> 'DROP', logmsg
=> 'DROP: ' },
737 # iptables -p icmp -h
738 my $icmp_type_names = {
741 'destination-unreachable' => 1,
742 'network-unreachable' => 1,
743 'host-unreachable' => 1,
744 'protocol-unreachable' => 1,
745 'port-unreachable' => 1,
746 'fragmentation-needed' => 1,
747 'source-route-failed' => 1,
748 'network-unknown' => 1,
750 'network-prohibited' => 1,
751 'host-prohibited' => 1,
752 'TOS-network-unreachable' => 1,
753 'TOS-host-unreachable' => 1,
754 'communication-prohibited' => 1,
755 'host-precedence-violation' => 1,
756 'precedence-cutoff' => 1,
757 'source-quench' => 1,
759 'network-redirect' => 1,
760 'host-redirect' => 1,
761 'TOS-network-redirect' => 1,
762 'TOS-host-redirect' => 1,
764 'router-advertisement' => 1,
765 'router-solicitation' => 1,
766 'time-exceeded' => 1,
767 'ttl-zero-during-transit' => 1,
768 'ttl-zero-during-reassembly' => 1,
769 'parameter-problem' => 1,
770 'ip-header-bad' => 1,
771 'required-option-missing' => 1,
772 'timestamp-request' => 1,
773 'timestamp-reply' => 1,
774 'address-mask-request' => 1,
775 'address-mask-reply' => 1,
778 # ip6tables -p icmpv6 -h
780 my $icmpv6_type_names = {
782 'destination-unreachable' => 1,
784 'communication-prohibited' => 1,
785 'address-unreachable' => 1,
786 'port-unreachable' => 1,
787 'packet-too-big' => 1,
788 'time-exceeded' => 1,
789 'ttl-zero-during-transit' => 1,
790 'ttl-zero-during-reassembly' => 1,
791 'parameter-problem' => 1,
793 'unknown-header-type' => 1,
794 'unknown-option' => 1,
797 'router-solicitation' => 1,
798 'router-advertisement' => 1,
799 'neighbor-solicitation' => 1,
800 'neighbour-solicitation' => 1,
801 'neighbor-advertisement' => 1,
802 'neighbour-advertisement' => 1,
806 sub init_firewall_macros
{
808 $pve_fw_parsed_macros = {};
811 my ($k, $macro) = @_;
812 my $lc_name = lc($k);
813 $pve_fw_macro_ipversion->{$k} = 0;
814 while (!ref($macro->[0])) {
815 my $desc = shift @$macro;
816 if ($desc eq 'ipv4only') {
817 $pve_fw_macro_ipversion->{$k} = 4;
818 } elsif ($desc eq 'ipv6only') {
819 $pve_fw_macro_ipversion->{$k} = 6;
821 $pve_fw_macro_descr->{$k} = $desc;
824 $pve_fw_preferred_macro_names->{$lc_name} = $k;
825 $pve_fw_parsed_macros->{$k} = $macro;
828 foreach my $k (keys %$pve_fw_macros) {
829 &$parse($k, $pve_fw_macros->{$k});
832 foreach my $k (keys %$pve_ipv6fw_macros) {
833 next if $pve_fw_parsed_macros->{$k};
834 &$parse($k, $pve_ipv6fw_macros->{$k});
835 $pve_fw_macro_ipversion->{$k} = 6;
839 init_firewall_macros
();
842 return wantarray ?
($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
847 sub get_etc_services
{
849 return $etc_services if $etc_services;
851 my $filename = "/etc/services";
853 my $fh = IO
::File-
>new($filename, O_RDONLY
);
855 warn "unable to read '$filename' - $!\n";
861 while (my $line = <$fh>) {
863 next if $line =~m/^#/;
864 next if ($line =~m/^\s*$/);
866 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp|sctp).*$!) {
867 $services->{byid
}->{$2}->{name
} = $1;
868 $services->{byid
}->{$2}->{port
} = $2;
869 $services->{byid
}->{$2}->{$3} = 1;
870 $services->{byname
}->{$1} = $services->{byid
}->{$2};
876 $etc_services = $services;
879 return $etc_services;
882 sub parse_protocol_file
{
885 my $fh = IO
::File-
>new($filename, O_RDONLY
);
887 warn "unable to read '$filename' - $!\n";
893 while (my $line = <$fh>) {
895 next if $line =~m/^#/;
896 next if ($line =~m/^\s*$/);
898 if ($line =~ m!^(\S+)\s+(\d+)(?:\s+.*)?$!) {
899 $protocols->{byid
}->{$2}->{name
} = $1;
900 $protocols->{byname
}->{$1} = $protocols->{byid
}->{$2};
911 sub get_etc_protocols
{
912 return $etc_protocols if $etc_protocols;
914 my $protocols = parse_protocol_file
('/etc/protocols');
916 # add special case for ICMP v6
917 $protocols->{byid
}->{icmpv6
}->{name
} = "icmpv6";
918 $protocols->{byname
}->{icmpv6
} = $protocols->{byid
}->{icmpv6
};
920 $etc_protocols = $protocols;
922 return $etc_protocols;
927 sub get_etc_ethertypes
{
928 $etc_ethertypes = parse_protocol_file
('/etc/ethertypes')
930 return $etc_ethertypes;
936 my ($new_value) = @_;
938 $__local_network = $new_value if defined($new_value);
940 return $__local_network if defined($__local_network);
943 my $nodename = PVE
::INotify
::nodename
();
945 my $ip = PVE
::Cluster
::remote_node_ip
($nodename);
947 my $testip = Net
::IP-
>new($ip);
949 my $isv6 = $testip->version == 6;
950 my $routes = $isv6 ? PVE
::ProcFSTools
::read_proc_net_ipv6_route
()
951 : PVE
::ProcFSTools
::read_proc_net_route
();
952 foreach my $entry (@$routes) {
955 $mask = $entry->{prefix
};
956 next if !$mask; # skip the default route...
958 $mask = $PVE::Network
::ipv4_mask_hash_localnet-
>{$entry->{mask
}};
959 next if !defined($mask);
961 my $cidr = "$entry->{dest}/$mask";
962 my $testnet = Net
::IP-
>new($cidr);
963 my $overlap = $testnet->overlaps($testip);
964 if ($overlap == $Net::IP
::IP_B_IN_A_OVERLAP
||
965 $overlap == $Net::IP
::IP_IDENTICAL
)
967 $__local_network = $cidr;
974 return $__local_network;
977 # ipset names are limited to 31 characters,
978 # and we use '-v4' or '-v6' to indicate IP versions,
979 # and we use '_swap' suffix for atomic update,
980 # for example PVEFW-${VMID}-${ipset_name}_swap
982 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
984 sub compute_ipset_chain_name
{
985 my ($vmid, $ipset_name, $ipversion) = @_;
987 $vmid = 0 if !defined($vmid);
989 my $id = "$vmid-${ipset_name}-v$ipversion";
991 if (length($id) > $max_iptables_ipset_name_length) {
992 $id = PVE
::Tools
::fnv31a_hex
($id);
998 sub compute_ipfilter_ipset_name
{
1001 return "ipfilter-$iface";
1004 sub parse_address_list
{
1007 if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
1008 die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
1012 if ($str =~ m/^${ip_alias_pattern}$/) {
1013 die "alias name too long\n" if length($str) > $max_alias_name_length;
1021 my @elements = split(/,/, $str);
1022 die "extraneous commas in list\n" if $str ne join(',', @elements);
1023 foreach my $elem (@elements) {
1025 my $ip = Net
::IP-
>new($elem);
1027 my $err = Net
::IP
::Error
();
1028 die "invalid IP address: $err\n";
1030 $iprange = 1 if $elem =~ m/-/;
1032 my $new_ipversion = Net
::IP
::ip_is_ipv6
($ip->ip()) ?
6 : 4;
1034 die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
1035 if $ipversion && ($new_ipversion != $ipversion);
1037 $ipversion = $new_ipversion;
1040 die "you can't use a range in a list\n" if $iprange && $count > 1;
1045 sub parse_port_name_number_or_range
{
1046 my ($str, $dport) = @_;
1048 my $services = PVE
::Firewall
::get_etc_services
();
1052 my @elements = split(/,/, $str);
1053 die "extraneous commas in list\n" if $str ne join(',', @elements);
1054 foreach my $item (@elements) {
1055 if ($item =~ m/^([0-9]+):([0-9]+)$/) {
1057 my ($port1, $port2) = ($1, $2);
1058 die "invalid port '$port1'\n" if $port1 > 65535;
1059 die "invalid port '$port2'\n" if $port2 > 65535;
1060 die "backwards range '$port1:$port2' not allowed, did you mean '$port2:$port1'?\n" if $port1 > $port2;
1061 } elsif ($item =~ m/^([0-9]+)$/) {
1064 die "invalid port '$port'\n" if $port > 65535;
1066 if ($dport && $icmp_type_names->{$item}) {
1068 } elsif ($dport && $icmpv6_type_names->{$item}) {
1071 die "invalid port '$item'\n" if !$services->{byname
}->{$item};
1076 die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 0;
1078 # I really don't like to use the word number here, but it's the only thing
1079 # that makes sense in a literal way. The range 1:100 counts as 2, not as
1080 # one and not as 100...
1081 die "too many entries in port list (> 15 numbers)\n"
1084 return (scalar(@elements) > 1);
1087 PVE
::JSONSchema
::register_format
('pve-fw-sport-spec', \
&pve_fw_verify_sport_spec
);
1088 sub pve_fw_verify_sport_spec
{
1091 parse_port_name_number_or_range
($portstr, 0);
1096 PVE
::JSONSchema
::register_format
('pve-fw-dport-spec', \
&pve_fw_verify_dport_spec
);
1097 sub pve_fw_verify_dport_spec
{
1100 parse_port_name_number_or_range
($portstr, 1);
1105 PVE
::JSONSchema
::register_format
('pve-fw-addr-spec', \
&pve_fw_verify_addr_spec
);
1106 sub pve_fw_verify_addr_spec
{
1109 parse_address_list
($list);
1114 PVE
::JSONSchema
::register_format
('pve-fw-protocol-spec', \
&pve_fw_verify_protocol_spec
);
1115 sub pve_fw_verify_protocol_spec
{
1118 my $protocols = get_etc_protocols
();
1120 die "unknown protocol '$proto'\n" if $proto &&
1121 !(defined($protocols->{byname
}->{$proto}) ||
1122 defined($protocols->{byid
}->{$proto}));
1128 # helper function for API
1130 sub copy_opject_with_digest
{
1133 my $sha = Digest
::SHA-
>new('sha1');
1136 foreach my $k (sort keys %$object) {
1137 my $v = $object->{$k};
1138 next if !defined($v);
1140 $sha->add($k, ':', $v, "\n");
1143 my $digest = $sha->hexdigest;
1145 $res->{digest
} = $digest;
1147 return wantarray ?
($res, $digest) : $res;
1150 sub copy_list_with_digest
{
1153 my $sha = Digest
::SHA-
>new('sha1');
1156 foreach my $entry (@$list) {
1158 foreach my $k (sort keys %$entry) {
1159 my $v = $entry->{$k};
1160 next if !defined($v);
1162 # Note: digest ignores refs ($rule->{errors})
1163 # since Digest::SHA expects a series of bytes,
1164 # we have to encode the value here to prevent errors when
1165 # using utf8 characters (eg. in comments)
1166 $sha->add($k, ':', encode_utf8
($v), "\n") if !ref($v); ;
1171 my $digest = $sha->hexdigest;
1173 foreach my $entry (@$res) {
1174 $entry->{digest
} = $digest;
1177 return wantarray ?
($res, $digest) : $res;
1180 our $cluster_option_properties = {
1182 description
=> "Enable or disable the firewall cluster wide.",
1188 description
=> "Enable ebtables rules cluster wide.",
1194 description
=> "Input policy.",
1197 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1200 description
=> "Output policy.",
1203 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1206 description
=> "Log ratelimiting settings",
1207 type
=> 'string', format
=> {
1210 description
=> 'Enable or disable log rate limiting',
1216 description
=> 'Frequency with which the burst bucket gets refilled',
1218 pattern
=> '[1-9][0-9]*\/(second|minute|hour|day)',
1219 format_description
=> 'rate',
1220 default => '1/second',
1226 description
=> 'Inital burst of packages which will get logged',
1234 our $host_option_properties = {
1236 description
=> "Enable host firewall rules.",
1240 log_level_in
=> get_standard_option
('pve-fw-loglevel', {
1241 description
=> "Log level for incoming traffic." }),
1242 log_level_out
=> get_standard_option
('pve-fw-loglevel', {
1243 description
=> "Log level for outgoing traffic." }),
1244 tcp_flags_log_level
=> get_standard_option
('pve-fw-loglevel', {
1245 description
=> "Log level for illegal tcp flags filter." }),
1246 smurf_log_level
=> get_standard_option
('pve-fw-loglevel', {
1247 description
=> "Log level for SMURFS filter." }),
1249 description
=> "Enable SMURFS filter.",
1254 description
=> "Filter illegal combinations of TCP flags.",
1258 nf_conntrack_max
=> {
1259 description
=> "Maximum number of tracked connections.",
1264 nf_conntrack_tcp_timeout_established
=> {
1265 description
=> "Conntrack established timeout.",
1271 description
=> "Enable NDP.",
1275 nf_conntrack_allow_invalid
=> {
1276 description
=> "Allow invalid packets on connection tracking.",
1281 log_nf_conntrack
=> {
1282 description
=> "Enable logging of conntrack information.",
1289 our $vm_option_properties = {
1291 description
=> "Enable/disable firewall rules.",
1296 description
=> "Enable/disable MAC address filter.",
1301 description
=> "Enable DHCP.",
1306 description
=> "Enable NDP.",
1311 description
=> "Allow sending Router Advertisement.",
1316 description
=> "Enable default IP filters. " .
1317 "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1318 "for every interface. Such ipsets implicitly contain sane default " .
1319 "restrictions such as restricting IPv6 link local addresses to " .
1320 "the one derived from the interface's MAC address. For containers " .
1321 "the configured IP addresses will be implicitly added.",
1326 description
=> "Input policy.",
1329 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1332 description
=> "Output policy.",
1335 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1337 log_level_in
=> get_standard_option
('pve-fw-loglevel', {
1338 description
=> "Log level for incoming traffic." }),
1339 log_level_out
=> get_standard_option
('pve-fw-loglevel', {
1340 description
=> "Log level for outgoing traffic." }),
1345 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.";
1347 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.";
1349 my $rule_properties = {
1351 description
=> "Update rule at position <pos>.",
1356 digest
=> get_standard_option
('pve-config-digest'),
1358 description
=> "Rule type.",
1361 enum
=> ['in', 'out', 'group'],
1364 description
=> "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1367 pattern
=> $security_group_name_pattern,
1372 description
=> "Use predefined standard macro.",
1377 iface
=> get_standard_option
('pve-iface', {
1378 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.",
1382 description
=> "Restrict packet source address. $addr_list_descr",
1383 type
=> 'string', format
=> 'pve-fw-addr-spec',
1387 description
=> "Restrict packet destination address. $addr_list_descr",
1388 type
=> 'string', format
=> 'pve-fw-addr-spec',
1392 description
=> "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1393 type
=> 'string', format
=> 'pve-fw-protocol-spec',
1397 description
=> "Flag to enable/disable a rule.",
1402 log => get_standard_option
('pve-fw-loglevel', {
1403 description
=> "Log level for firewall rule.",
1406 description
=> "Restrict TCP/UDP source port. $port_descr",
1407 type
=> 'string', format
=> 'pve-fw-sport-spec',
1411 description
=> "Restrict TCP/UDP destination port. $port_descr",
1412 type
=> 'string', format
=> 'pve-fw-dport-spec',
1416 description
=> "Descriptive comment.",
1422 sub add_rule_properties
{
1423 my ($properties) = @_;
1425 foreach my $k (keys %$rule_properties) {
1426 my $h = $rule_properties->{$k};
1427 # copy data, so that we can modify later without side effects
1428 foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1434 sub delete_rule_properties
{
1435 my ($rule, $delete_str) = @_;
1437 foreach my $opt (PVE
::Tools
::split_list
($delete_str)) {
1438 raise_param_exc
({ 'delete' => "no such property ('$opt')"})
1439 if !defined($rule_properties->{$opt});
1440 raise_param_exc
({ 'delete' => "unable to delete required property '$opt'"})
1441 if $opt eq 'type' || $opt eq 'action';
1442 delete $rule->{$opt};
1448 my $apply_macro = sub {
1449 my ($macro_name, $param, $verify, $ipversion) = @_;
1451 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1452 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1454 if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1455 $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1458 # skip macros which are specific to another ipversion
1459 if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1460 return if $ipversion != $required;
1465 foreach my $templ (@$macro_rules) {
1467 my $param_used = {};
1468 foreach my $k (keys %$templ) {
1469 my $v = $templ->{$k};
1470 if ($v eq 'PARAM') {
1472 $param_used->{$k} = 1;
1473 } elsif ($v eq 'DEST') {
1474 $v = $param->{dest
};
1475 $param_used->{dest
} = 1;
1476 } elsif ($v eq 'SOURCE') {
1477 $v = $param->{source
};
1478 $param_used->{source
} = 1;
1482 my $msg = "missing parameter '$k' in macro '$macro_name'";
1483 raise_param_exc
({ macro => $msg }) if $verify;
1488 foreach my $k (keys %$param) {
1489 next if $k eq 'macro';
1490 next if !defined($param->{$k});
1491 next if $param_used->{$k};
1492 if (defined($rule->{$k})) {
1493 if ($rule->{$k} ne $param->{$k}) {
1494 my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1495 raise_param_exc
({ $k => $msg }) if $verify;
1499 $rule->{$k} = $param->{$k};
1502 push @$rules, $rule;
1508 my $rule_env_iface_lookup = {
1517 my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1519 my $allow_groups = $rule_env eq 'group' ?
0 : 1;
1521 my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1522 die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1524 my $errors = $rule->{errors
} || {};
1526 my $error_count = 0;
1528 my $add_error = sub {
1529 my ($param, $msg) = @_;
1531 raise_param_exc
({ $param => $msg }) if !$noerr;
1533 $errors->{$param} = $msg if !$errors->{$param};
1537 my $set_ip_version = sub {
1540 die "detected mixed ipv4/ipv6 adresses in rule\n"
1541 if $ipversion && ($vers != $ipversion);
1546 my $check_ipset_or_alias_property = sub {
1547 my ($name, $expected_ipversion) = @_;
1549 if (my $value = $rule->{$name}) {
1550 if ($value =~ m/^\+/) {
1551 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1552 &$add_error($name, "no such ipset '$1'")
1553 if !($cluster_conf->{ipset
}->{$1} || ($fw_conf && $fw_conf->{ipset
}->{$1}));
1556 &$add_error($name, "invalid ipset name '$value'");
1558 } elsif ($value =~ m/^${ip_alias_pattern}$/){
1559 my $alias = lc($value);
1560 &$add_error($name, "no such alias '$value'")
1561 if !($cluster_conf->{aliases
}->{$alias} || ($fw_conf && $fw_conf->{aliases
}->{$alias}));
1562 my $e = $fw_conf ?
$fw_conf->{aliases
}->{$alias} : undef;
1563 $e = $cluster_conf->{aliases
}->{$alias} if !$e && $cluster_conf;
1565 &$set_ip_version($e->{ipversion
});
1570 my $type = $rule->{type
};
1571 my $action = $rule->{action
};
1573 &$add_error('type', "missing property") if !$type;
1574 &$add_error('action', "missing property") if !$action;
1577 if ($type eq 'in' || $type eq 'out') {
1578 &$add_error('action', "unknown action '$action'")
1579 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1580 } elsif ($type eq 'group') {
1581 &$add_error('type', "security groups not allowed")
1583 &$add_error('action', "invalid characters in security group name")
1584 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1586 &$add_error('type', "unknown rule type '$type'");
1590 if ($rule->{iface
}) {
1591 &$add_error('type', "parameter -i not allowed for this rule type")
1593 eval { PVE
::JSONSchema
::pve_verify_iface
($rule->{iface
}); };
1594 &$add_error('iface', $@) if $@;
1595 if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1596 &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1597 if $rule->{iface
} !~ m/^net(\d+)$/;
1601 if ($rule->{macro}) {
1602 if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1603 $rule->{macro} = $preferred_name;
1605 &$add_error('macro', "unknown macro '$rule->{macro}'");
1609 if ($rule->{proto
}) {
1610 eval { pve_fw_verify_protocol_spec
($rule->{proto
}); };
1611 &$add_error('proto', $@) if $@;
1612 &$set_ip_version(4) if $rule->{proto
} eq 'icmp';
1613 &$set_ip_version(6) if $rule->{proto
} eq 'icmpv6';
1616 if ($rule->{dport
}) {
1617 eval { parse_port_name_number_or_range
($rule->{dport
}, 1); };
1618 &$add_error('dport', $@) if $@;
1619 my $proto = $rule->{proto
};
1620 &$add_error('proto', "missing property - 'dport' requires this property")
1622 &$add_error('dport', "protocol '$proto' does not support ports")
1623 if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1624 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1627 if ($rule->{sport
}) {
1628 eval { parse_port_name_number_or_range
($rule->{sport
}, 0); };
1629 &$add_error('sport', $@) if $@;
1630 my $proto = $rule->{proto
};
1631 &$add_error('proto', "missing property - 'sport' requires this property")
1633 &$add_error('sport', "protocol '$proto' does not support ports")
1634 if !$PROTOCOLS_WITH_PORTS->{$proto};
1637 if ($rule->{source
}) {
1639 my $source_ipversion = parse_address_list
($rule->{source
});
1640 &$set_ip_version($source_ipversion);
1642 &$add_error('source', $@) if $@;
1643 &$check_ipset_or_alias_property('source', $ipversion);
1646 if ($rule->{dest
}) {
1648 my $dest_ipversion = parse_address_list
($rule->{dest
});
1649 &$set_ip_version($dest_ipversion);
1651 &$add_error('dest', $@) if $@;
1652 &$check_ipset_or_alias_property('dest', $ipversion);
1655 $rule->{ipversion
} = $ipversion if $ipversion;
1657 if ($rule->{macro} && !$error_count) {
1658 eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1660 if (ref($err) eq "PVE::Exception" && $err->{errors
}) {
1661 my $eh = $err->{errors
};
1662 foreach my $p (keys %$eh) {
1663 &$add_error($p, $eh->{$p});
1666 &$add_error('macro', "$err");
1671 $rule->{errors
} = $errors if $error_count;
1676 sub copy_rule_data
{
1677 my ($rule, $param) = @_;
1679 foreach my $k (keys %$rule_properties) {
1680 if (defined(my $v = $param->{$k})) {
1681 if ($v eq '' || $v eq '-') {
1692 sub rules_modify_permissions
{
1693 my ($rule_env) = @_;
1695 if ($rule_env eq 'host') {
1697 check
=> ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1699 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1701 check
=> ['perm', '/', [ 'Sys.Modify' ]],
1703 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1705 check
=> ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1712 sub rules_audit_permissions
{
1713 my ($rule_env) = @_;
1715 if ($rule_env eq 'host') {
1717 check
=> ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1719 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1721 check
=> ['perm', '/', [ 'Sys.Audit' ]],
1723 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1725 check
=> ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1733 my $bridge_firewall_enabled = 0;
1735 sub enable_bridge_firewall
{
1737 return if $bridge_firewall_enabled; # only once
1739 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1740 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1742 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1743 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/ipv4/tcp_syncookies", "1");
1745 $bridge_firewall_enabled = 1;
1748 sub iptables_restore_cmdlist
{
1751 run_command
(['iptables-restore', '-n'], input
=> $cmdlist, errmsg
=> "iptables_restore_cmdlist");
1754 sub ip6tables_restore_cmdlist
{
1757 run_command
(['ip6tables-restore', '-n'], input
=> $cmdlist, errmsg
=> "iptables_restore_cmdlist");
1760 sub ipset_restore_cmdlist
{
1763 run_command
(['ipset', 'restore'], input
=> $cmdlist, errmsg
=> "ipset_restore_cmdlist");
1766 sub ebtables_restore_cmdlist
{
1769 run_command
(['ebtables-restore'], input
=> $cmdlist, errmsg
=> "ebtables_restore_cmdlist");
1772 sub iptables_get_chains
{
1773 my ($iptablescmd) = @_;
1775 $iptablescmd = "iptables" if !$iptablescmd;
1779 # check what chains we want to track
1780 my $is_pvefw_chain = sub {
1783 return 1 if $name =~ m/^PVEFW-\S+$/;
1785 return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1787 return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1789 return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1790 return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1802 return if $line =~ m/^#/;
1803 return if $line =~ m/^\s*$/;
1805 if ($line =~ m/^\*(\S+)$/) {
1810 return if $table ne 'filter';
1812 if ($line =~ m/^:(\S+)\s/) {
1814 return if !&$is_pvefw_chain($chain);
1815 $res->{$chain} = "unknown";
1816 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1817 my ($chain, $sig) = ($1, $2);
1818 return if !&$is_pvefw_chain($chain);
1819 $res->{$chain} = $sig;
1820 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1823 # simply ignore the rest
1828 run_command
(["$iptablescmd-save"], outfunc
=> $parser);
1830 return wantarray ?
($res, $hooks) : $res;
1833 sub iptables_chain_digest
{
1835 my $digest = Digest
::SHA-
>new('sha1');
1836 foreach my $rule (@$rules) { # order is important
1837 $digest->add($rule);
1839 return $digest->b64digest;
1842 sub ipset_chain_digest
{
1845 my $digest = Digest
::SHA-
>new('sha1');
1846 foreach my $rule (sort @$rules) { # note: sorted
1847 $digest->add($rule);
1849 return $digest->b64digest;
1852 sub ipset_get_chains
{
1860 return if $line =~ m/^#/;
1861 return if $line =~ m/^\s*$/;
1862 if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1864 $line =~ s/\s+$//; # delete trailing white space
1865 push @{$chains->{$chain}}, $line;
1867 # simply ignore the rest
1872 run_command
(['ipset', 'save'], outfunc
=> $parser);
1874 # compute digest for each chain
1875 foreach my $chain (keys %$chains) {
1876 $res->{$chain} = ipset_chain_digest
($chains->{$chain});
1882 sub ebtables_get_chains
{
1888 return if $line =~ m/^#/;
1889 return if $line =~ m/^\s*$/;
1890 if ($line =~ m/^:(\S+)\s\S+$/) {
1891 # Make sure we know chains exist even if they're empty.
1892 $chains->{$1} //= [];
1893 } elsif ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
1896 push @{$chains->{$chain}}, $line;
1898 # simply ignore the rest
1903 run_command
(['ebtables-save'], outfunc
=> $parser);
1904 # compute digest for each chain and store rules as well
1905 foreach my $chain (keys %$chains) {
1906 $res->{$chain}->{rules
} = $chains->{$chain};
1907 $res->{$chain}->{sig
} = iptables_chain_digest
($chains->{$chain});
1912 # substitude action of rule according to action hash
1913 sub rule_substitude_action
{
1914 my ($rule, $actions) = @_;
1916 if (my $action = $rule->{action
}) {
1917 $rule->{action
} = $actions->{$action} if defined($actions->{$action});
1921 # generate a src or dst match
1922 # $dir(ection) is either d or s
1923 sub ipt_gen_src_or_dst_match
{
1924 my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
1929 } elsif ($dir eq 'd') {
1932 die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
1936 if ($adr =~ m/^\+/) {
1937 if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
1940 if ($fw_conf && $fw_conf->{ipset
}->{$name}) {
1941 $ipset_chain = compute_ipset_chain_name
($fw_conf->{vmid
}, $name, $ipversion);
1942 } elsif ($cluster_conf && $cluster_conf->{ipset
}->{$name}) {
1943 $ipset_chain = compute_ipset_chain_name
(0, $name, $ipversion);
1945 die "no such ipset '$name'\n";
1947 $match = "-m set --match-set ${ipset_chain} ${srcdst}";
1949 die "invalid security group name '$adr'\n";
1951 } elsif ($adr =~ m/^${ip_alias_pattern}$/){
1952 my $alias = lc($adr);
1953 my $e = $fw_conf ?
$fw_conf->{aliases
}->{$alias} : undef;
1954 $e = $cluster_conf->{aliases
}->{$alias} if !$e && $cluster_conf;
1955 die "no such alias '$adr'\n" if !$e;
1956 $match = "-${dir} $e->{cidr}";
1957 } elsif ($adr =~ m/\-/){
1958 $match = "-m iprange --${srcdst}-range $adr";
1960 $match = "-${dir} $adr";
1966 # convert a %rule to an array of iptables commands
1967 sub ipt_rule_to_cmds
{
1968 my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
1970 die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
1974 if (defined $rule->{match
}) {
1975 push @match, $rule->{match
};
1977 push @match, "-i $rule->{iface_in}" if $rule->{iface_in
};
1978 push @match, "-o $rule->{iface_out}" if $rule->{iface_out
};
1980 if ($rule->{source
}) {
1981 push @match, ipt_gen_src_or_dst_match
($rule->{source
}, 's', $ipversion, $cluster_conf, $fw_conf);
1983 if ($rule->{dest
}) {
1984 push @match, ipt_gen_src_or_dst_match
($rule->{dest
}, 'd', $ipversion, $cluster_conf, $fw_conf);
1987 if (my $proto = $rule->{proto
}) {
1988 push @match, "-p $proto";
1990 my $multidport = defined($rule->{dport
}) && parse_port_name_number_or_range
($rule->{dport
}, 1);
1991 my $multisport = defined($rule->{sport
}) && parse_port_name_number_or_range
($rule->{sport
}, 0);
1993 my $add_dport = sub {
1994 return if !$rule->{dport
};
1996 if ($proto eq 'icmp') {
1997 # Note: we use dport to store --icmp-type
1998 die "unknown icmp-type '$rule->{dport}'\n"
1999 if $rule->{dport
} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport
}});
2000 push @match, "-m icmp --icmp-type $rule->{dport}";
2001 } elsif ($proto eq 'icmpv6') {
2002 # Note: we use dport to store --icmpv6-type
2003 die "unknown icmpv6-type '$rule->{dport}'\n"
2004 if $rule->{dport
} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport
}});
2005 push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
2006 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
2007 die "protocol $proto does not have ports\n";
2008 } elsif ($multidport) {
2009 push @match, "--match multiport", "--dports $rule->{dport}";
2011 push @match, "--dport $rule->{dport}";
2015 my $add_sport = sub {
2016 return if !$rule->{sport
};
2018 die "protocol $proto does not have ports\n"
2019 if !$PROTOCOLS_WITH_PORTS->{$proto};
2021 push @match, "--match multiport", "--sports $rule->{sport}";
2023 push @match, "--sport $rule->{sport}";
2027 # order matters - single port before multiport!
2028 $add_dport->() if $multisport;
2030 $add_dport->() if !$multisport;
2031 } elsif ($rule->{dport
} || $rule->{sport
}) {
2032 die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport
};
2033 die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport
};
2036 push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype
};
2038 my $matchstr = scalar(@match) ?
join(' ', @match) : "";
2041 if (defined $rule->{target
}) {
2042 $targetstr = $rule->{target
};
2044 my $action = (defined $rule->{action
}) ?
$rule->{action
} : "";
2045 my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
2046 $targetstr = ($goto) ?
"-g $action" : "-j $action";
2050 my $log = $rule->{log};
2051 if (defined($log) && $log ne 'nolog') {
2052 my $loglevel = $log_level_hash->{$log};
2053 my $logaction = get_log_rule_base
($chain, $vmid, $rule->{logmsg
}, $loglevel);
2054 push @iptcmds, "-A $chain $matchstr $logaction";
2056 push @iptcmds, "-A $chain $matchstr $targetstr";
2060 sub ruleset_generate_rule
{
2061 my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf, $vmid) = @_;
2065 if ($rule->{macro}) {
2066 $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
2071 # update all or nothing
2073 foreach my $r (@$rules) {
2074 push @ipt_rule_cmds, ipt_rule_to_cmds
($r, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid);
2076 foreach my $c (@ipt_rule_cmds) {
2077 ruleset_add_ipt_cmd
($ruleset, $chain, $c);
2081 sub ruleset_create_chain
{
2082 my ($ruleset, $chain) = @_;
2084 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
2085 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
2087 die "chain '$chain' already exists\n" if $ruleset->{$chain};
2089 $ruleset->{$chain} = [];
2092 sub ruleset_chain_exist
{
2093 my ($ruleset, $chain) = @_;
2095 return $ruleset->{$chain} ?
1 : undef;
2098 # add an iptables command (like generated by ipt_rule_to_cmds) to a chain
2099 sub ruleset_add_ipt_cmd
{
2100 my ($ruleset, $chain, $iptcmd) = @_;
2102 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2104 push @{$ruleset->{$chain}}, $iptcmd;
2107 sub ruleset_addrule
{
2108 my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
2110 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2113 my $loglevel = $log_level_hash->{$log};
2114 my $logaction = get_log_rule_base
($chain, $vmid, $logmsg, $loglevel);
2115 push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
2117 # for stable ebtables digests avoid double-spaces to match ebtables-save output
2118 $match .= ' ' if length($match);
2119 push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
2122 sub ruleset_insertrule
{
2123 my ($ruleset, $chain, $match, $action, $log) = @_;
2125 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2127 unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2130 sub get_log_rule_base
{
2131 my ($chain, $vmid, $msg, $loglevel) = @_;
2133 $vmid = 0 if !defined($vmid);
2134 $msg = "" if !defined($msg);
2137 if (defined($global_log_ratelimit)) {
2138 $rlimit = "-m limit $global_log_ratelimit ";
2141 # Note: we use special format for prefix to pass further
2142 # info to log daemon (VMID, LOGLEVEL and CHAIN)
2143 return "${rlimit}-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2146 sub ruleset_add_chain_policy {
2147 my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2149 if ($policy eq 'ACCEPT') {
2151 my $rule = { action => 'ACCEPT' };
2152 rule_substitude_action($rule, { ACCEPT => $accept_action});
2153 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2155 } elsif ($policy eq 'DROP') {
2157 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop
");
2159 ruleset_addrule($ruleset, $chain, "", "-j DROP
", $loglevel, "policy
$policy: ", $vmid);
2160 } elsif ($policy eq 'REJECT') {
2161 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject
");
2163 ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject
", $loglevel, "policy
$policy: ", $vmid);
2166 die "internal error
: unknown policy
'$policy'";
2170 sub ruleset_chain_add_ndp {
2171 my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2172 return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2174 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-solicitation
", $accept);
2175 if ($direction ne 'OUT' || $options->{radv}) {
2176 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-advertisement
", $accept);
2178 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type neighbor-solicitation
", $accept);
2179 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type neighbor-advertisement
", $accept);
2182 sub ruleset_chain_add_conn_filters {
2183 my ($ruleset, $chain, $allow_invalid, $accept) = @_;
2185 if (!$allow_invalid) {
2186 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
", "-j DROP
");
2188 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
", "-j
$accept");
2191 sub ruleset_chain_add_input_filters {
2192 my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2194 if ($cluster_conf->{ipset}->{blacklist}){
2195 if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist
")) {
2196 ruleset_create_chain($ruleset, "PVEFW-blacklist
");
2197 ruleset_addrule($ruleset, "PVEFW-blacklist
", "", "-j DROP
", $loglevel, "DROP
: ", 0);
2199 my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2200 ruleset_addrule($ruleset, $chain, "-m set
--match-set
${ipset_chain
} src
", "-j PVEFW-blacklist
");
2203 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2204 if ($ipversion == 4) {
2205 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
,NEW
", "-j PVEFW-smurfs
");
2209 if ($options->{tcpflags}) {
2210 ruleset_addrule($ruleset, $chain, "-p tcp
", "-j PVEFW-tcpflags
");
2214 sub ruleset_create_vm_chain {
2215 my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2217 ruleset_create_chain($ruleset, $chain);
2218 my $accept = generate_nfqueue($options);
2220 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2221 if ($ipversion == 4) {
2222 if ($direction eq 'OUT') {
2223 ruleset_generate_rule($ruleset, $chain, $ipversion,
2224 { action => 'PVEFW-SET-ACCEPT-MARK',
2225 proto => 'udp', sport => 68, dport => 67 });
2227 ruleset_generate_rule($ruleset, $chain, $ipversion,
2228 { action => 'ACCEPT',
2229 proto => 'udp', sport => 67, dport => 68 });
2231 } elsif ($ipversion == 6) {
2232 if ($direction eq 'OUT') {
2233 ruleset_generate_rule($ruleset, $chain, $ipversion,
2234 { action => 'PVEFW-SET-ACCEPT-MARK',
2235 proto => 'udp', sport => 546, dport => 547 });
2237 ruleset_generate_rule($ruleset, $chain, $ipversion,
2238 { action => 'ACCEPT',
2239 proto => 'udp', sport => 547, dport => 546 });
2245 if ($direction eq 'OUT') {
2246 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2247 ruleset_addrule($ruleset, $chain, "-m mac
! --mac-source
$macaddr", "-j DROP
");
2249 if ($ipversion == 6 && !$options->{radv}) {
2250 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-advertisement
", "-j DROP
");
2252 if ($ipfilter_ipset) {
2253 ruleset_addrule($ruleset, $chain, "-m set
! --match-set
$ipfilter_ipset src
", "-j DROP
");
2255 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2258 my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j
$accept";
2259 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2262 sub ruleset_add_group_rule {
2263 my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2265 my $group = $rule->{action};
2266 my $group_chain = "GROUP-
$group-$direction";
2267 if(!ruleset_chain_exist($ruleset, $group_chain)){
2268 generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2271 if ($direction eq 'OUT' && $rule->{iface_out}) {
2272 ruleset_addrule($ruleset, $chain, "-o
$rule->{iface_out
}", "-j
$group_chain");
2273 } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2274 ruleset_addrule($ruleset, $chain, "-i
$rule->{iface_in
}", "-j
$group_chain");
2276 ruleset_addrule($ruleset, $chain, "", "-j
$group_chain");
2279 ruleset_addrule($ruleset, $chain, "-m mark
--mark
$FWACCEPTMARK_ON", "-j
$action");
2282 sub ruleset_generate_vm_rules {
2283 my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion, $vmid) = @_;
2285 my $lc_direction = lc($direction);
2287 my $in_accept = generate_nfqueue($options);
2289 foreach my $rule (@$rules) {
2290 next if $rule->{iface} && $rule->{iface} ne $netid;
2291 next if !$rule->{enable} || $rule->{errors};
2292 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2294 if ($rule->{type} eq 'group') {
2295 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2296 $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2298 next if $rule->{type} ne $lc_direction;
2300 $rule->{logmsg} = "$rule->{action
}: ";
2301 if ($direction eq 'OUT') {
2302 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" });
2303 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2305 rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject
" });
2306 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2314 sub generate_nfqueue {
2317 if ($options->{ips}) {
2318 my $action = "NFQUEUE
";
2319 if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2320 if (defined($3) && defined($1)) {
2321 $action .= " --queue-balance
$1:$3";
2322 } elsif (defined($1)) {
2323 $action .= " --queue-num
$1";
2326 $action .= " --queue-bypass
" if $feature_ipset_nomatch; #need kernel 3.10
2333 sub ruleset_generate_vm_ipsrules {
2334 my ($ruleset, $options, $direction, $iface) = @_;
2336 if ($options->{ips} && $direction eq 'IN') {
2337 my $nfqueue = generate_nfqueue($options);
2339 if (!ruleset_chain_exist($ruleset, "PVEFW-IPS
")) {
2340 ruleset_create_chain($ruleset, "PVEFW-IPS
");
2343 ruleset_addrule($ruleset, "PVEFW-IPS
", "-m physdev
--physdev-out
$iface --physdev-is-bridged
", "-j
$nfqueue");
2347 sub generate_tap_rules_direction {
2348 my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2350 my $lc_direction = lc($direction);
2352 my $rules = $vmfw_conf->{rules};
2354 my $options = $vmfw_conf->{options};
2355 my $loglevel = get_option_log_level($options, "log_level_
${lc_direction
}");
2357 my $tapchain = "$iface-$direction";
2359 my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2360 my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2361 if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2363 # create chain with mac and ip filter
2364 ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2366 if ($options->{enable}) {
2367 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion, $vmid);
2369 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2374 if ($direction eq 'OUT') {
2375 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2377 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2380 my $accept = generate_nfqueue($options);
2381 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : $accept;
2382 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2384 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : 'ACCEPT';
2385 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2388 # plug the tap chain to bridge chain
2389 if ($direction eq 'IN') {
2390 ruleset_addrule($ruleset, "PVEFW-FWBR-IN
",
2391 "-m physdev
--physdev-is-bridged
--physdev-out
$iface", "-j
$tapchain");
2393 ruleset_addrule($ruleset, "PVEFW-FWBR-OUT
",
2394 "-m physdev
--physdev-is-bridged
--physdev-in
$iface", "-j
$tapchain");
2398 sub enable_host_firewall {
2399 my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf) = @_;
2401 my $options = $hostfw_conf->{options};
2402 my $cluster_options = $cluster_conf->{options};
2403 my $rules = $hostfw_conf->{rules};
2404 my $cluster_rules = $cluster_conf->{rules};
2406 # corosync preparation
2407 my $corosync_rule = "-p udp
--dport
5404:5405";
2408 my $corosync_local_addresses = {};
2409 my $multicast_enabled;
2410 my $local_hostname = PVE::INotify::nodename();
2411 if (defined($corosync_conf)) {
2412 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2413 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2415 if ($node_name eq $local_hostname) {
2416 $corosync_local_addresses->{$key} = $node_ip;
2420 # allow multicast only if enabled in config
2421 my $corosync_transport = $corosync_conf->{main}->{totem}->{transport};
2422 $multicast_enabled = defined($corosync_transport) && $corosync_transport eq 'udp';
2425 # host inbound firewall
2426 my $chain = "PVEFW-HOST-IN
";
2427 ruleset_create_chain($ruleset, $chain);
2429 my $loglevel = get_option_log_level($options, "log_level_in
");
2431 ruleset_addrule($ruleset, $chain, "-i lo
", "-j ACCEPT
");
2433 ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2434 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2435 ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2437 # we use RETURN because we need to check also tap rules
2438 my $accept_action = 'RETURN';
2440 ruleset_addrule($ruleset, $chain, "-p igmp
", "-j
$accept_action"); # important for multicast
2442 # add host rules first, so that cluster wide rules can be overwritten
2443 foreach my $rule (@$rules, @$cluster_rules) {
2444 next if !$rule->{enable} || $rule->{errors};
2445 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2447 $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2450 if ($rule->{type} eq 'group') {
2451 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2452 } elsif ($rule->{type} eq 'in') {
2453 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" });
2454 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2458 delete $rule->{iface_in};
2461 # allow standard traffic for management ipset (includes cluster network)
2462 my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management
", $ipversion);
2463 my $mngmntsrc = "-m set
--match-set
${mngmnt_ipset_chain
} src
";
2464 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
8006", "-j
$accept_action"); # PVE API
2465 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
5900:5999", "-j
$accept_action"); # PVE VNC Console
2466 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
3128", "-j
$accept_action"); # SPICE Proxy
2467 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
22", "-j
$accept_action"); # SSH
2469 # corosync inbound rules
2470 if (defined($corosync_conf)) {
2471 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
$corosync_rule", "-j
$accept_action")
2472 if $multicast_enabled;
2474 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2475 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2476 my $destination = $corosync_local_addresses->{$key};
2478 if ($node_name ne $local_hostname && defined($destination)) {
2479 # accept only traffic on same ring
2480 ruleset_addrule($ruleset, $chain, "-d
$destination -s
$node_ip $corosync_rule", "-j
$accept_action");
2485 # implement input policy
2486 my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2487 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2489 # host outbound firewall
2490 $chain = "PVEFW-HOST-OUT
";
2491 ruleset_create_chain($ruleset, $chain);
2493 $loglevel = get_option_log_level($options, "log_level_out
");
2495 ruleset_addrule($ruleset, $chain, "-o lo
", "-j ACCEPT
");
2497 ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2499 # we use RETURN because we may want to check other thigs later
2500 $accept_action = 'RETURN';
2501 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j
$accept_action");
2503 ruleset_addrule($ruleset, $chain, "-p igmp
", "-j
$accept_action"); # important for multicast
2505 # add host rules first, so that cluster wide rules can be overwritten
2506 foreach my $rule (@$rules, @$cluster_rules) {
2507 next if !$rule->{enable} || $rule->{errors};
2508 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2510 $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2512 $rule->{logmsg} = "$rule->{action
}: ";
2513 if ($rule->{type} eq 'group') {
2514 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2515 } elsif ($rule->{type} eq 'out') {
2516 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" });
2517 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2521 delete $rule->{iface_out};
2524 # allow standard traffic on cluster network
2525 my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2526 my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2528 if ($localnet && ($ipversion == $localnet_ver)) {
2529 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
8006", "-j
$accept_action"); # PVE API
2530 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
22", "-j
$accept_action"); # SSH
2531 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
5900:5999", "-j
$accept_action"); # PVE VNC Console
2532 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
3128", "-j
$accept_action"); # SPICE Proxy
2535 # corosync outbound rules
2536 if (defined($corosync_conf)) {
2537 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
$corosync_rule", "-j
$accept_action")
2538 if $multicast_enabled;
2540 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2541 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2542 my $source = $corosync_local_addresses->{$key};
2544 if ($node_name ne $local_hostname && defined($source)) {
2545 # accept only traffic on same ring
2546 ruleset_addrule($ruleset, $chain, "-s
$source -d
$node_ip $corosync_rule", "-j
$accept_action");
2551 # implement output policy
2552 $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2553 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2555 ruleset_addrule($ruleset, "PVEFW-OUTPUT
", "", "-j PVEFW-HOST-OUT
");
2556 ruleset_addrule($ruleset, "PVEFW-INPUT
", "", "-j PVEFW-HOST-IN
");
2559 sub generate_group_rules {
2560 my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2562 my $rules = $cluster_conf->{groups}->{$group};
2565 warn "no such security group
'$group'\n";
2566 $rules = []; # create empty chain
2569 my $chain = "GROUP-
${group
}-IN
";
2571 ruleset_create_chain($ruleset, $chain);
2572 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2574 foreach my $rule (@$rules) {
2575 next if $rule->{type} ne 'in';
2576 next if !$rule->{enable} || $rule->{errors};
2577 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2578 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" });
2579 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2582 $chain = "GROUP-
${group
}-OUT
";
2584 ruleset_create_chain($ruleset, $chain);
2585 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2587 foreach my $rule (@$rules) {
2588 next if $rule->{type} ne 'out';
2589 next if !$rule->{enable} || $rule->{errors};
2590 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2591 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2592 # check also other tap rules later
2593 rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject
" });
2594 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2599 my $valid_netdev_names = {};
2600 for (my $i = 0; $i < $MAX_NETS; $i++) {
2601 $valid_netdev_names->{"net
$i"} = 1;
2604 sub get_mark_values {
2605 my ($value, $mask) = @_;
2606 $value = hex($value) if $value =~ /^0x/;
2607 $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2608 $mask = 0xffffffff if !defined($mask);
2609 return ($value, $mask);
2613 my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env) = @_;
2615 my $orig_line = $line;
2619 # we can add single line comments to the end of the rule
2620 if ($line =~ s/#\s*(.*?)\s*$//) {
2621 $rule->{comment} = decode('utf8', $1);
2624 # we can disable a rule when prefixed with '|'
2626 $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2628 $line =~ s/^(\S+)\s+(\S+)\s*// ||
2629 die "unable to parse rule
: $line\n";
2631 $rule->{type} = lc($1);
2632 $rule->{action} = $2;
2634 if ($rule->{type} eq 'in' || $rule->{type} eq 'out') {
2635 if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2636 $rule->{macro} = $1;
2637 $rule->{action} = $2;
2641 while (length($line)) {
2642 if ($line =~ s/^-i (\S+)\s*//) {
2643 $rule->{iface} = $1;
2647 last if $rule->{type} eq 'group';
2649 if ($line =~ s/^-p (\S+)\s*//) {
2650 $rule->{proto} = $1;
2654 if ($line =~ s/^-dport (\S+)\s*//) {
2655 $rule->{dport} = $1;
2659 if ($line =~ s/^-sport (\S+)\s*//) {
2660 $rule->{sport} = $1;
2663 if ($line =~ s/^-source (\S+)\s*//) {
2664 $rule->{source} = $1;
2667 if ($line =~ s/^-dest (\S+)\s*//) {
2671 if ($line =~ s/^-log (emerg|alert|crit|err|warning|notice|info|debug|nolog)\s*//) {
2679 die "unable to parse rule parameters
: $line\n" if length($line);
2681 $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2682 if ($rule->{errors}) {
2683 # The verbose flag really means we're running from the CLI and want
2684 # output on the console - in the other case we really want such errors
2685 # to go into the syslog instead.
2686 my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2687 $log->("$prefix - errors
in rule parameters
: $orig_line\n");
2688 foreach my $p (keys %{$rule->{errors}}) {
2689 $log->(" $p: $rule->{errors
}->{$p}\n");
2696 sub verify_ethertype {
2698 my $types = get_etc_ethertypes();
2699 die "unknown ethernet protocol type
: $value\n"
2700 if !defined($types->{byname}->{$value}) &&
2701 !defined($types->{byid}->{$value});
2704 sub parse_vmfw_option {
2709 my $loglevels = "emerg
|alert
|crit
|err
|warning
|notice
|info
|debug
|nolog
";
2711 if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2714 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2716 $value = $2 ? lc($3) : '';
2717 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2720 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2723 } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
2726 verify_ethertype($_) foreach split(/\s*,\s*/, $value);
2728 die "can
't parse option '$line'\n"
2731 return ($opt, $value);
2734 sub parse_hostfw_option {
2739 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2741 if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid):\s*(0|1)\s*$/i) {
2744 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2746 $value = $2 ? lc($3) : '';
2747 } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2751 die "can't parse option
'$line'\n"
2754 return ($opt, $value);
2757 sub parse_clusterfw_option {
2762 if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2765 if (($value > 1) && ((time() - $value) > 60)) {
2768 } elsif ($line =~ m/^(ebtables):\s*(0|1)\s*$/i) {
2771 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2774 } elsif ($line =~ m/^(log_ratelimit):\s*(\S+)\s*$/) {
2778 die "can
't parse option '$line'\n"
2781 return ($opt, $value);
2785 my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2787 my $alias = lc($cidr);
2788 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2789 $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2791 die "no such alias '$cidr'\n" if !$e;;
2793 return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2796 sub parse_ip_or_cidr {
2801 if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2804 } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2808 die "value does not look like a valid IP address or CIDR network\n";
2811 return wantarray ? ($cidr, $ipversion) : $cidr;
2817 # we can add single line comments to the end of the line
2818 my $comment = decode('utf8
', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2820 if ($line =~ m/^(\S+)\s(\S+)$/) {
2821 my ($name, $cidr) = ($1, $2);
2824 ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2829 ipversion => $ipversion,
2831 $data->{comment} = $comment if $comment;
2838 sub generic_fw_config_parser {
2839 my ($filename, $cluster_conf, $empty_conf, $rule_env) = @_;
2844 my $res = $empty_conf;
2847 if ($filename =~ m!^/etc/pve/(.*)$!) {
2848 $raw = PVE::Cluster::get_config($1);
2850 $raw = eval { PVE::Tools::file_get_contents($filename) }; # ignore errors
2855 while ($raw =~ /^\h*(.*?)\h*$/gm) {
2858 next if $line =~ m/^#/;
2859 next if $line =~ m/^\s*$/;
2862 my $prefix = "$filename (line $linenr)";
2864 if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2865 $section = 'options
';
2869 if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2870 $section = 'aliases
';
2874 if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2875 $section = 'groups
';
2879 die "security group name too long\n" if length($group) > $max_group_name_length;
2880 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2883 ($section, $group, $comment) = undef;
2884 warn "$prefix: $err";
2888 $res->{$section}->{$group} = [];
2889 $res->{group_comments}->{$group} = decode('utf8
', $comment)
2894 if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2899 if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2904 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2905 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2908 ($section, $group, $comment) = undef;
2909 warn "$prefix: $err";
2913 $res->{$section}->{$group} = [];
2914 $res->{ipset_comments}->{$group} = decode('utf8
', $comment)
2920 warn "$prefix: skip line - no section\n";
2924 if ($section eq 'options
') {
2927 if ($rule_env eq 'cluster
') {
2928 ($opt, $value) = parse_clusterfw_option($line);
2929 } elsif ($rule_env eq 'host
') {
2930 ($opt, $value) = parse_hostfw_option($line);
2932 ($opt, $value) = parse_vmfw_option($line);
2934 $res->{options}->{$opt} = $value;
2936 warn "$prefix: $@" if $@;
2937 } elsif ($section eq 'aliases
') {
2939 my $data = parse_alias($line);
2940 $res->{aliases}->{lc($data->{name})} = $data;
2942 warn "$prefix: $@" if $@;
2943 } elsif ($section eq 'rules
') {
2945 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env); };
2947 warn "$prefix: $err";
2950 push @{$res->{$section}}, $rule;
2951 } elsif ($section eq 'groups
') {
2953 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group
'); };
2955 warn "$prefix: $err";
2958 push @{$res->{$section}->{$group}}, $rule;
2959 } elsif ($section eq 'ipset
') {
2960 # we can add single line comments to the end of the rule
2961 my $comment = decode('utf8
', $1) if $line =~ s/#\s*(.*?)\s*$//;
2963 $line =~ m/^(\!)?\s*(\S+)\s*$/;
2968 if ($nomatch && !$feature_ipset_nomatch) {
2969 $errors->{nomatch} = "nomatch not supported by kernel";
2973 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2974 resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2976 $cidr = parse_ip_or_cidr($cidr);
2981 $errors->{cidr} = $err;
2984 if ($cidr =~ m!/0+$!) {
2985 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
2988 my $entry = { cidr => $cidr };
2989 $entry->{nomatch} = 1 if $nomatch;
2990 $entry->{comment} = $comment if $comment;
2991 $entry->{errors} = $errors if $errors;
2993 if ($verbose && $errors) {
2994 warn "$prefix - errors in ipset '$group': $line\n";
2995 foreach my $p (keys %{$errors}) {
2996 warn " $p: $errors->{$p}\n";
3000 push @{$res->{$section}->{$group}}, $entry;
3002 warn "$prefix: skip line - unknown section\n";
3011 my ($code, @param) = @_;
3015 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
3022 sub read_local_vm_config {
3027 my $vmdata = { qemu => $qemu, lxc => $lxc };
3029 my $vmlist = PVE::Cluster::get_vmlist();
3030 return $vmdata if !$vmlist || !$vmlist->{ids};
3031 my $ids = $vmlist->{ids};
3033 foreach my $vmid (keys %$ids) {
3034 next if !$vmid; # skip VE0
3035 my $d = $ids->{$vmid};
3036 next if !$d->{node} || $d->{node} ne $nodename;
3037 next if !$d->{type};
3038 if ($d->{type} eq 'qemu
') {
3039 if ($have_qemu_server) {
3040 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
3041 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3042 $qemu->{$vmid} = $conf;
3045 } elsif ($d->{type} eq 'lxc
') {
3047 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
3048 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3049 $lxc->{$vmid} = $conf;
3058 sub load_vmfw_conf {
3059 my ($cluster_conf, $rule_env, $vmid, $dir) = @_;
3061 $dir = $pvefw_conf_dir if !defined($dir);
3062 my $filename = "$dir/$vmid.fw";
3069 ipset_comments => {},
3072 my $vmfw_conf = generic_fw_config_parser($filename, $cluster_conf, $empty_conf, $rule_env);
3073 $vmfw_conf->{vmid} = $vmid;
3078 my $format_rules = sub {
3079 my ($rules, $allow_iface) = @_;
3083 foreach my $rule (@$rules) {
3084 if ($rule->{type} eq 'in' || $rule->{type} eq 'out
' || $rule->{type} eq 'group
') {
3085 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
3086 $raw .= uc($rule->{type});
3087 if ($rule->{macro}) {
3088 $raw .= " $rule->{macro}($rule->{action})";
3090 $raw .= " " . $rule->{action};
3092 if ($allow_iface && $rule->{iface}) {
3093 $raw .= " -i $rule->{iface}";
3096 if ($rule->{type} ne 'group
') {
3097 $raw .= " -source $rule->{source}" if $rule->{source};
3098 $raw .= " -dest $rule->{dest}" if $rule->{dest};
3099 $raw .= " -p $rule->{proto}" if $rule->{proto};
3100 $raw .= " -dport $rule->{dport}" if $rule->{dport};
3101 $raw .= " -sport $rule->{sport}" if $rule->{sport};
3102 $raw .= " -log $rule->{log}" if $rule->{log};
3105 $raw .= " # " . encode('utf8
', $rule->{comment})
3106 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
3109 die "unknown rule type '$rule->{type
}'";
3116 my $format_options = sub {
3121 $raw .= "[OPTIONS]\n\n";
3122 foreach my $opt (keys %$options) {
3123 $raw .= "$opt: $options->{$opt}\n";
3130 my $format_aliases = sub {
3135 $raw .= "[ALIASES]\n\n";
3136 foreach my $k (keys %$aliases) {
3137 my $e = $aliases->{$k};
3138 $raw .= "$e->{name} $e->{cidr}";
3139 $raw .= " # " . encode('utf8
', $e->{comment})
3140 if $e->{comment} && $e->{comment} !~ m/^\s*$/;
3148 my $format_ipsets = sub {
3153 foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
3154 if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
3155 my $utf8comment = encode('utf8
', $comment);
3156 $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3158 $raw .= "[IPSET $ipset]\n\n";
3160 my $options = $fw_conf->{ipset}->{$ipset};
3163 foreach my $entry (@$options) {
3164 $nethash->{$entry->{cidr}} = $entry;
3167 foreach my $cidr (sort keys %$nethash) {
3168 my $entry = $nethash->{$cidr};
3169 my $line = $entry->{nomatch} ? '!' : '';
3170 $line .= $entry->{cidr};
3171 $line .= " # " . encode('utf8
', $entry->{comment})
3172 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3182 sub save_vmfw_conf {
3183 my ($vmid, $vmfw_conf) = @_;
3187 my $options = $vmfw_conf->{options};
3188 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3190 my $aliases = $vmfw_conf->{aliases};
3191 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3193 $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
3195 my $rules = $vmfw_conf->{rules} || [];
3196 if ($rules && scalar(@$rules)) {
3197 $raw .= "[RULES]\n\n";
3198 $raw .= &$format_rules($rules, 1);
3202 my $filename = "$pvefw_conf_dir/$vmid.fw";
3204 mkdir $pvefw_conf_dir;
3205 PVE::Tools::file_set_contents($filename, $raw);
3211 sub remove_vmfw_conf {
3214 my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3216 unlink $vmfw_conffile;
3219 sub clone_vmfw_conf {
3220 my ($vmid, $newid) = @_;
3222 my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3223 my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3225 if (-f $clonevm_conffile) {
3226 unlink $clonevm_conffile;
3228 if (-f $sourcevm_conffile) {
3229 my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3230 PVE::Tools::file_set_contents($clonevm_conffile, $data);
3234 sub read_vm_firewall_configs {
3235 my ($cluster_conf, $vmdata, $dir) = @_;
3237 my $vmfw_configs = {};
3239 foreach my $vmid (keys %{$vmdata->{qemu}}) {
3240 my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm
', $vmid, $dir);
3241 next if !$vmfw_conf->{options}; # skip if file does not exists
3242 $vmfw_configs->{$vmid} = $vmfw_conf;
3244 foreach my $vmid (keys %{$vmdata->{lxc}}) {
3245 my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct
', $vmid, $dir);
3246 next if !$vmfw_conf->{options}; # skip if file does not exists
3247 $vmfw_configs->{$vmid} = $vmfw_conf;
3250 return $vmfw_configs;
3253 sub get_option_log_level {
3254 my ($options, $k) = @_;
3256 my $v = $options->{$k};
3257 $v = $default_log_level if !defined($v);
3259 return undef if $v eq '' || $v eq 'nolog
';
3261 return $v if defined($log_level_hash->{$v});
3263 warn "unknown log level ($k = '$v')\n";
3268 sub generate_std_chains {
3269 my ($ruleset, $options, $ipversion) = @_;
3271 my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3273 my $loglevel = get_option_log_level($options, 'smurf_log_level
');
3274 my $chain = 'PVEFW-smurflog
';
3275 if ( $std_chains->{$chain} ) {
3276 foreach my $r (@{$std_chains->{$chain}}) {
3277 $r->{log} = $loglevel;
3281 # same as shorewall logflags action.
3282 $loglevel = get_option_log_level($options, 'tcp_flags_log_level
');
3283 $chain = 'PVEFW-logflags
';
3284 if ( $std_chains->{$chain} ) {
3285 foreach my $r (@{$std_chains->{$chain}}) {
3286 $r->{log} = $loglevel;
3290 foreach my $chain (keys %$std_chains) {
3291 ruleset_create_chain($ruleset, $chain);
3292 foreach my $rule (@{$std_chains->{$chain}}) {
3294 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, 0);
3296 die "rule $rule as string - should not happen";
3302 sub generate_ipset_chains {
3303 my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3305 foreach my $ipset (keys %{$ipsets}) {
3307 my $options = $ipsets->{$ipset};
3309 if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3310 if (my $ips = $device_ips->{$1}) {
3311 $options = [@$options, @$ips];
3317 foreach my $entry (@$options) {
3318 next if $entry->{errors}; # skip entries with errors
3321 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3322 ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3324 ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3326 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3328 # ip_compress_address takes an address only, no CIDR
3329 my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3330 $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3331 $cidr .= $prefix_len if defined($prefix_len);
3337 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3342 foreach my $ipversion (4, 6) {
3343 my $data = $nethash->{$ipversion};
3345 my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3347 my $hashsize = scalar(@$options);
3348 if ($hashsize <= 64) {
3351 $hashsize = round_powerof2($hashsize);
3354 my $family = $ipversion == "6" ? "inet6" : "inet";
3356 $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3358 foreach my $cidr (sort keys %$data) {
3359 my $entry = $data->{$cidr};
3361 my $cmd = "add $name $cidr";
3362 if ($entry->{nomatch}) {
3363 if ($feature_ipset_nomatch) {
3364 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3366 warn "ignore !$cidr - nomatch not supported by kernel\n";
3369 push @{$ipset_ruleset->{$name}}, $cmd;
3376 sub round_powerof2 {
3380 $int |= $int >> $_ foreach (1,2,4,8,16);
3384 my $set_global_log_ratelimit = sub {
3385 my $cluster_opts = shift;
3387 $global_log_ratelimit = '--limit
1/sec
';
3388 if (defined(my $log_rlimit = $cluster_opts->{log_ratelimit})) {
3389 my $ll_format = $cluster_option_properties->{log_ratelimit}->{format};
3390 my $limit = PVE::JSONSchema::parse_property_string($ll_format, $log_rlimit);
3392 if ($limit->{enable}) {
3393 if (my $rate = $limit->{rate}) {
3394 $global_log_ratelimit = "--limit $rate";
3396 if (my $burst = $limit->{burst}) {
3397 $global_log_ratelimit .= " --limit-burst $burst";
3400 $global_log_ratelimit = undef;
3405 sub load_clusterfw_conf {
3406 my ($filename) = @_;
3408 $filename = $clusterfw_conf_filename if !defined($filename);
3414 group_comments => {},
3416 ipset_comments => {},
3419 my $cluster_conf = generic_fw_config_parser($filename, $empty_conf, $empty_conf, 'cluster
');
3420 $set_global_log_ratelimit->($cluster_conf->{options});
3422 return $cluster_conf;
3425 sub save_clusterfw_conf {
3426 my ($cluster_conf) = @_;
3430 my $options = $cluster_conf->{options};
3431 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3433 my $aliases = $cluster_conf->{aliases};
3434 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3436 $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3438 my $rules = $cluster_conf->{rules};
3439 if ($rules && scalar(@$rules)) {
3440 $raw .= "[RULES]\n\n";
3441 $raw .= &$format_rules($rules, 1);
3445 if ($cluster_conf->{groups}) {
3446 foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3447 my $rules = $cluster_conf->{groups}->{$group};
3448 if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3449 my $utf8comment = encode('utf8
', $comment);
3450 $raw .= "[group $group] # $utf8comment\n\n";
3452 $raw .= "[group $group]\n\n";
3455 $raw .= &$format_rules($rules, 0);
3461 mkdir $pvefw_conf_dir;
3462 PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3464 unlink $clusterfw_conf_filename;
3468 sub load_hostfw_conf {
3469 my ($cluster_conf, $filename) = @_;
3471 $filename = $hostfw_conf_filename if !defined($filename);
3473 my $empty_conf = { rules => [], options => {}};
3474 return generic_fw_config_parser($filename, $cluster_conf, $empty_conf, 'host
');
3477 sub save_hostfw_conf {
3478 my ($hostfw_conf) = @_;
3482 my $options = $hostfw_conf->{options};
3483 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3485 my $rules = $hostfw_conf->{rules};
3486 if ($rules && scalar(@$rules)) {
3487 $raw .= "[RULES]\n\n";
3488 $raw .= &$format_rules($rules, 1);
3493 PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3495 unlink $hostfw_conf_filename;
3500 my ($cluster_conf, $hostfw_conf, $vmdata, $corosync_conf) = @_;
3504 # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3505 $pve_std_chains = dclone($pve_std_chains_conf);
3507 if ($vmdata) { # test mode
3508 my $testdir = $vmdata->{testdir} || die "no test directory specified";
3509 my $filename = "$testdir/cluster.fw";
3510 $cluster_conf = load_clusterfw_conf($filename);
3512 $filename = "$testdir/host.fw";
3513 $hostfw_conf = load_hostfw_conf($cluster_conf, $filename);
3515 $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir);
3516 } else { # normal operation
3517 $cluster_conf = load_clusterfw_conf(undef) if !$cluster_conf;
3519 $hostfw_conf = load_hostfw_conf($cluster_conf, undef) if !$hostfw_conf;
3521 # cfs_update is handled by daemon or API
3522 $corosync_conf = PVE::Cluster::cfs_read_file("corosync.conf")
3523 if !defined($corosync_conf) && PVE::Corosync::check_conf_exists(1);
3525 $vmdata = read_local_vm_config();
3526 $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef);
3529 return ({},{},{},{}) if !$cluster_conf->{options}->{enable};
3532 if ($cluster_conf->{aliases}->{local_network}) {
3533 $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3536 ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3538 $cluster_conf->{aliases}->{local_network} = {
3539 name => 'local_network
', cidr => $localnet, ipversion => $localnet_ver };
3542 push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3544 my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3545 my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
3546 my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata);
3547 my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3549 return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
3552 sub compile_iptables_filter {
3553 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
3557 ruleset_create_chain($ruleset, "PVEFW-INPUT");
3558 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3560 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3562 my $hostfw_options = $hostfw_conf->{options} || {};
3564 # fixme: what log level should we use here?
3565 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3567 my $conn_allow_invalid = $hostfw_options->{nf_conntrack_allow_invalid} // 0;
3568 ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", $conn_allow_invalid, "ACCEPT");
3570 ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3571 ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3573 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3575 ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3576 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3578 generate_std_chains($ruleset, $hostfw_options, $ipversion);
3580 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3582 if ($hostfw_enable) {
3583 eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf); };
3584 warn $@ if $@; # just to be sure - should not happen
3587 # generate firewall rules for QEMU VMs
3588 foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3590 my $conf = $vmdata->{qemu}->{$vmid};
3591 my $vmfw_conf = $vmfw_configs->{$vmid};
3592 return if !$vmfw_conf;
3594 foreach my $netid (sort keys %$conf) {
3595 next if $netid !~ m/^net(\d+)$/;
3596 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3597 next if !$net->{firewall};
3598 my $iface = "tap${vmid}i$1";
3600 my $macaddr = $net->{macaddr};
3601 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3602 $vmfw_conf, $vmid, 'IN
', $ipversion);
3603 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3604 $vmfw_conf, $vmid, 'OUT
', $ipversion);
3607 warn $@ if $@; # just to be sure - should not happen
3610 # generate firewall rules for LXC containers
3611 foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3613 my $conf = $vmdata->{lxc}->{$vmid};
3614 my $vmfw_conf = $vmfw_configs->{$vmid};
3615 return if !$vmfw_conf;
3617 if ($vmfw_conf->{options}->{enable}) {
3618 foreach my $netid (sort keys %$conf) {
3619 next if $netid !~ m/^net(\d+)$/;
3620 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3621 next if !$net->{firewall};
3622 my $iface = "veth${vmid}i$1";
3623 my $macaddr = $net->{hwaddr};
3624 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3625 $vmfw_conf, $vmid, 'IN
', $ipversion);
3626 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3627 $vmfw_conf, $vmid, 'OUT
', $ipversion);
3631 warn $@ if $@; # just to be sure - should not happen
3634 if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3635 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3641 sub mac_to_linklocal {
3643 my @parts = split(/:/, $macaddr);
3644 # The standard link local address uses the fe80::/64 prefix with the
3645 # modified EUI-64 identifier derived from the MAC address by flipping the
3646 # universal/local bit and inserting FF:FE in the middle.
3648 $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3649 my @meui64 = (@parts[0,1,2], 'ff
', 'fe
', @parts[3,4,5]);
3650 return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3653 sub compile_ipsets {
3654 my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3657 if ($cluster_conf->{aliases}->{local_network}) {
3658 $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3661 ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3663 $cluster_conf->{aliases}->{local_network} = {
3664 name => 'local_network
', cidr => $localnet, ipversion => $localnet_ver };
3667 push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3670 my $ipset_ruleset = {};
3672 # generate ipsets for QEMU VMs
3673 foreach my $vmid (keys %{$vmdata->{qemu}}) {
3675 my $conf = $vmdata->{qemu}->{$vmid};
3676 my $vmfw_conf = $vmfw_configs->{$vmid};
3677 return if !$vmfw_conf;
3679 # When the 'ipfilter
' option is enabled every device for which there
3680 # is no 'ipfilter-netX
' ipset defiend gets an implicit empty default
3682 # The reason is that ipfilter ipsets are always filled with standard
3683 # IPv6 link-local filters.
3684 my $ipsets = $vmfw_conf->{ipset};
3685 my $implicit_sets = {};
3687 my $device_ips = {};
3688 foreach my $netid (keys %$conf) {
3689 next if $netid !~ m/^net(\d+)$/;
3690 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3691 next if !$net->{firewall};
3693 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3694 $implicit_sets->{"ipfilter-$netid"} = [];
3697 my $macaddr = $net->{macaddr};
3698 my $linklocal = mac_to_linklocal($macaddr);
3699 $device_ips->{$netid} = [
3700 { cidr => $linklocal },
3701 { cidr => 'fe80
::/10', nomatch => 1 }
3705 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3706 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3708 warn $@ if $@; # just to be sure - should not happen
3711 # generate firewall rules for LXC containers
3712 foreach my $vmid (keys %{$vmdata->{lxc}}) {
3714 my $conf = $vmdata->{lxc}->{$vmid};
3715 my $vmfw_conf = $vmfw_configs->{$vmid};
3716 return if !$vmfw_conf;
3718 # When the 'ipfilter
' option is enabled every device for which there
3719 # is no 'ipfilter-netX
' ipset defiend gets an implicit empty default
3721 # The reason is that ipfilter ipsets are always filled with standard
3722 # IPv6 link-local filters, as well as the IP addresses configured
3723 # for the container.
3724 my $ipsets = $vmfw_conf->{ipset};
3725 my $implicit_sets = {};
3727 my $device_ips = {};
3728 foreach my $netid (keys %$conf) {
3729 next if $netid !~ m/^net(\d+)$/;
3730 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3731 next if !$net->{firewall};
3733 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3734 $implicit_sets->{"ipfilter-$netid"} = [];
3737 my $macaddr = $net->{hwaddr};
3738 my $linklocal = mac_to_linklocal($macaddr);
3739 my $set = $device_ips->{$netid} = [
3740 { cidr => $linklocal },
3741 { cidr => 'fe80
::/10', nomatch => 1 }
3743 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3744 push @$set, { cidr => $1 };
3746 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3747 push @$set, { cidr => $1 };
3751 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3752 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3754 warn $@ if $@; # just to be sure - should not happen
3757 generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3759 return $ipset_ruleset;
3762 sub compile_ebtables_filter {
3763 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata) = @_;
3765 if (!($cluster_conf->{options}->{ebtables} // 1)) {
3771 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3773 ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3774 #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED
', to speedup rules
3775 ruleset_addrule($ruleset, 'PVEFW-FORWARD
', '-p IPv4
', '-j ACCEPT
');
3776 ruleset_addrule($ruleset, 'PVEFW-FORWARD
', '-p IPv6
', '-j ACCEPT
');
3777 ruleset_addrule($ruleset, 'PVEFW-FORWARD
', '-o fwln
+', '-j PVEFW-FWBR-OUT
');
3779 # generate firewall rules for QEMU VMs
3780 foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3782 my $conf = $vmdata->{qemu}->{$vmid};
3783 my $vmfw_conf = $vmfw_configs->{$vmid};
3784 return if !$vmfw_conf;
3785 my $ipsets = $vmfw_conf->{ipset};
3787 foreach my $netid (sort keys %$conf) {
3788 next if $netid !~ m/^net(\d+)$/;
3789 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3790 next if !$net->{firewall};
3791 my $iface = "tap${vmid}i$1";
3792 my $macaddr = $net->{macaddr};
3794 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3795 foreach my $ipaddr (@$ipset) {
3796 my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3797 next if !$ip || ($version && $version != 4);
3798 push(@$arpfilter, $ip);
3801 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3804 warn $@ if $@; # just to be sure - should not happen
3807 # generate firewall rules for LXC containers
3808 foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3810 my $conf = $vmdata->{lxc}->{$vmid};
3812 my $vmfw_conf = $vmfw_configs->{$vmid};
3813 return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3814 my $ipsets = $vmfw_conf->{ipset};
3816 foreach my $netid (sort keys %$conf) {
3817 next if $netid !~ m/^net(\d+)$/;
3818 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3819 next if !$net->{firewall};
3820 my $iface = "veth${vmid}i$1";
3821 my $macaddr = $net->{hwaddr};
3823 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3824 foreach my $ipaddr (@$ipset) {
3825 my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3826 next if !$ip || ($version && $version != 4);
3827 push(@$arpfilter, $ip);
3830 if (defined(my $ip = $net->{ip}) && $vmfw_conf->{options}->{ipfilter}) {
3831 # ebtables changes this to a .0/MASK network but we just
3832 # want the address here, no network - see #2193
3834 push @$arpfilter, $ip;
3836 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3839 warn $@ if $@; # just to be sure - should not happen
3845 sub generate_tap_layer2filter {
3846 my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter) = @_;
3847 my $options = $vmfw_conf->{options};
3849 my $tapchain = $iface."-OUT";
3851 # ebtables remove zeros from mac pairs
3852 $macaddr =~ s/0([0-9a-f])/$1/ig;
3853 $macaddr = lc($macaddr);
3855 ruleset_create_chain($ruleset, $tapchain);
3857 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
3858 ruleset_addrule($ruleset, $tapchain, "-s ! $macaddr", '-j DROP
');
3862 my $arpchain = $tapchain."-ARP";
3863 ruleset_addrule($ruleset, $tapchain, "-p ARP", "-j $arpchain");
3864 ruleset_create_chain($ruleset, $arpchain);
3866 foreach my $ip (@{$arpfilter}) {
3867 ruleset_addrule($ruleset, $arpchain, "-p ARP --arp-ip-src $ip", '-j RETURN
');
3869 ruleset_addrule($ruleset, $arpchain, '', '-j DROP
');
3872 if (defined($options->{layer2_protocols})){
3873 my $protochain = $tapchain."-PROTO";
3874 ruleset_addrule($ruleset, $tapchain, '', "-j $protochain");
3875 ruleset_create_chain($ruleset, $protochain);
3877 foreach my $proto (split(/,/, $options->{layer2_protocols})) {
3878 ruleset_addrule($ruleset, $protochain, "-p $proto", '-j RETURN
');
3880 ruleset_addrule($ruleset, $protochain, '', '-j DROP
');
3883 ruleset_addrule($ruleset, $tapchain, '', '-j ACCEPT
');
3885 ruleset_addrule($ruleset, 'PVEFW-FWBR-OUT
', "-i $iface", "-j $tapchain");
3888 # the parameter $change_only_regex changes two things if defined:
3889 # * all chains not matching it will be left intact
3890 # * both the $active_chains hash and the returned status_hash have different
3891 # structure (they contain a key named 'rules
').
3892 sub get_ruleset_status {
3893 my ($ruleset, $active_chains, $digest_fn, $change_only_regex) = @_;
3895 my $statushash = {};
3897 foreach my $chain (sort keys %$ruleset) {
3898 my $rules = $ruleset->{$chain};
3899 my $sig = &$digest_fn($rules);
3902 $statushash->{$chain}->{sig} = $sig;
3903 if (defined($change_only_regex)) {
3904 $oldsig = $active_chains->{$chain}->{sig};
3905 $statushash->{$chain}->{rules} = $rules;
3907 $oldsig = $active_chains->{$chain};
3909 if (!defined($oldsig)) {
3910 $statushash->{$chain}->{action} = 'create
';
3912 if ($oldsig eq $sig) {
3913 $statushash->{$chain}->{action} = 'exists';
3915 $statushash->{$chain}->{action} = 'update
';
3919 print "$statushash->{$chain}->{action} $chain ($sig)\n";
3920 foreach my $cmd (@{$rules}) {
3926 foreach my $chain (sort keys %$active_chains) {
3927 next if defined($ruleset->{$chain});
3928 my $action = 'delete';
3929 my $sig = $active_chains->{$chain};
3930 if (defined($change_only_regex)) {
3931 $action = 'ignore
' if ($chain !~ m/$change_only_regex/);
3932 $statushash->{$chain}->{rules} = $active_chains->{$chain}->{rules};
3935 $statushash->{$chain}->{action} = $action;
3936 $statushash->{$chain}->{sig} = $sig;
3937 print "$action $chain ($sig)\n" if $verbose;
3943 sub print_sig_rule {
3944 my ($chain, $sig) = @_;
3946 # We just use this to store a SHA1 checksum used to detect changes
3947 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3950 sub get_ruleset_cmdlist {
3951 my ($ruleset, $iptablescmd) = @_;
3953 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3955 my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3956 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
3958 # create missing chains first
3959 foreach my $chain (sort keys %$ruleset) {
3960 my $stat = $statushash->{$chain};
3961 die "internal error" if !$stat;
3962 next if $stat->{action} ne 'create
';
3964 $cmdlist .= ":$chain - [0:0]\n";
3967 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3968 my $chain = "PVEFW-$h";
3969 if ($ruleset->{$chain} && !$hooks->{$h}) {
3970 $cmdlist .= "-A $h -j $chain\n";
3974 foreach my $chain (sort keys %$ruleset) {
3975 my $stat = $statushash->{$chain};
3976 die "internal error" if !$stat;
3978 if ($stat->{action
} eq 'update' || $stat->{action
} eq 'create') {
3979 $cmdlist .= "-F $chain\n";
3980 foreach my $cmd (@{$ruleset->{$chain}}) {
3981 $cmdlist .= "$cmd\n";
3983 $cmdlist .= print_sig_rule
($chain, $stat->{sig
});
3984 } elsif ($stat->{action
} eq 'delete') {
3985 die "internal error"; # this should not happen
3986 } elsif ($stat->{action
} eq 'exists') {
3989 die "internal error - unknown status '$stat->{action}'";
3993 foreach my $chain (keys %$statushash) {
3994 next if $statushash->{$chain}->{action
} ne 'delete';
3995 $cmdlist .= "-F $chain\n";
3997 foreach my $chain (keys %$statushash) {
3998 next if $statushash->{$chain}->{action
} ne 'delete';
3999 next if $chain eq 'PVEFW-INPUT';
4000 next if $chain eq 'PVEFW-OUTPUT';
4001 next if $chain eq 'PVEFW-FORWARD';
4002 $cmdlist .= "-X $chain\n";
4005 my $changes = $cmdlist ne "*filter\n" ?
1 : 0;
4007 $cmdlist .= "COMMIT\n";
4009 return wantarray ?
($cmdlist, $changes) : $cmdlist;
4012 my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tap|veth)\d+i\d+-(?:IN|OUT)/;
4014 sub get_ebtables_cmdlist
{
4018 my $cmdlist = "*filter\n";
4020 my $active_chains = ebtables_get_chains
();
4021 my $statushash = get_ruleset_status
($ruleset, $active_chains,
4022 \
&iptables_chain_digest
,
4023 $pve_ebtables_chainname_regex);
4025 # create chains first and make sure PVE rules are evaluated if active
4026 my $append_pve_to_forward = '-A FORWARD -j PVEFW-FORWARD';
4027 my $pve_include = 0;
4028 foreach my $chain (sort keys %$statushash) {
4029 next if ($statushash->{$chain}->{action
} eq 'delete');
4030 $cmdlist .= ":$chain ACCEPT\n";
4031 $pve_include = 1 if ($chain eq 'PVEFW-FORWARD');
4034 foreach my $chain (sort keys %$statushash) {
4035 my $stat = $statushash->{$chain};
4036 $changes = 1 if ($stat->{action
} !~ 'ignore|exists');
4037 next if ($stat->{action
} eq 'delete');
4039 foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
4040 if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
4041 next if ! $pve_include;
4044 $cmdlist .= "$cmd\n";
4047 $cmdlist .= "$append_pve_to_forward\n" if $pve_include;
4049 return wantarray ?
($cmdlist, $changes) : $cmdlist;
4052 sub get_ipset_cmdlist
{
4057 my $delete_cmdlist = "";
4059 my $active_chains = ipset_get_chains
();
4060 my $statushash = get_ruleset_status
($ruleset, $active_chains, \
&ipset_chain_digest
);
4062 # remove stale _swap chains
4063 foreach my $chain (keys %$active_chains) {
4064 if ($chain =~ m/^PVEFW-\S+_swap$/) {
4065 $cmdlist .= "destroy $chain\n";
4069 foreach my $chain (keys %$ruleset) {
4070 my $stat = $statushash->{$chain};
4071 die "internal error" if !$stat;
4073 if ($stat->{action
} eq 'create') {
4074 foreach my $cmd (@{$ruleset->{$chain}}) {
4075 $cmdlist .= "$cmd\n";
4080 foreach my $chain (keys %$ruleset) {
4081 my $stat = $statushash->{$chain};
4082 die "internal error" if !$stat;
4084 if ($stat->{action
} eq 'update') {
4085 my $chain_swap = $chain."_swap";
4087 foreach my $cmd (@{$ruleset->{$chain}}) {
4088 $cmd =~ s/$chain/$chain_swap/;
4089 $cmdlist .= "$cmd\n";
4091 $cmdlist .= "swap $chain_swap $chain\n";
4092 $cmdlist .= "flush $chain_swap\n";
4093 $cmdlist .= "destroy $chain_swap\n";
4097 # the remove unused chains
4098 foreach my $chain (keys %$statushash) {
4099 next if $statushash->{$chain}->{action
} ne 'delete';
4101 $delete_cmdlist .= "flush $chain\n";
4102 $delete_cmdlist .= "destroy $chain\n";
4105 my $changes = ($cmdlist || $delete_cmdlist) ?
1 : 0;
4107 return ($cmdlist, $delete_cmdlist, $changes);
4111 my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = @_;
4113 enable_bridge_firewall
();
4115 my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
4116 get_ipset_cmdlist
($ipset_ruleset);
4118 my ($cmdlist, $changes) = get_ruleset_cmdlist
($ruleset);
4119 my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist
($rulesetv6, "ip6tables");
4120 my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist
($ebtables_ruleset);
4123 if ($ipset_changes) {
4124 print "ipset changes:\n";
4125 print $ipset_create_cmdlist if $ipset_create_cmdlist;
4126 print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
4130 print "iptables changes:\n";
4135 print "ip6tables changes:\n";
4139 if ($ebtables_changes) {
4140 print "ebtables changes:\n";
4141 print $ebtables_cmdlist;
4145 my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
4146 PVE
::Tools
::file_set_contents
($tmpfile, $ipset_create_cmdlist || '');
4148 ipset_restore_cmdlist
($ipset_create_cmdlist);
4150 $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
4151 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlist || '');
4153 iptables_restore_cmdlist
($cmdlist);
4155 $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
4156 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlistv6 || '');
4158 ip6tables_restore_cmdlist
($cmdlistv6);
4160 $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
4161 PVE
::Tools
::file_set_contents
($tmpfile, $ipset_delete_cmdlist || '');
4163 ipset_restore_cmdlist
($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
4165 ebtables_restore_cmdlist
($ebtables_cmdlist);
4167 $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
4168 PVE
::Tools
::file_set_contents
($tmpfile, $ebtables_cmdlist || '');
4170 # test: re-read status and check if everything is up to date
4171 my $active_chains = iptables_get_chains
();
4172 my $statushash = get_ruleset_status
($ruleset, $active_chains, \
&iptables_chain_digest
);
4175 foreach my $chain (sort keys %$ruleset) {
4176 my $stat = $statushash->{$chain};
4177 if ($stat->{action
} ne 'exists') {
4178 warn "unable to update chain '$chain'\n";
4183 my $active_chainsv6 = iptables_get_chains
("ip6tables");
4184 my $statushashv6 = get_ruleset_status
($rulesetv6, $active_chainsv6, \
&iptables_chain_digest
);
4186 foreach my $chain (sort keys %$rulesetv6) {
4187 my $stat = $statushashv6->{$chain};
4188 if ($stat->{action
} ne 'exists') {
4189 warn "unable to update chain '$chain'\n";
4194 my $active_ebtables_chains = ebtables_get_chains
();
4195 my $ebtables_statushash = get_ruleset_status
($ebtables_ruleset,
4196 $active_ebtables_chains, \
&iptables_chain_digest
,
4197 $pve_ebtables_chainname_regex);
4199 foreach my $chain (sort keys %$ebtables_ruleset) {
4200 my $stat = $ebtables_statushash->{$chain};
4201 if ($stat->{action
} ne 'exists') {
4202 warn "ebtables : unable to update chain '$chain'\n";
4207 die "unable to apply firewall changes\n" if $errors;
4209 update_nf_conntrack_max
($hostfw_conf);
4211 update_nf_conntrack_tcp_timeout_established
($hostfw_conf);
4213 update_nf_conntrack_logging
($hostfw_conf);
4216 sub update_nf_conntrack_max
{
4217 my ($hostfw_conf) = @_;
4219 my $max = 65536; # reasonable default
4221 my $options = $hostfw_conf->{options
} || {};
4223 if (defined($options->{nf_conntrack_max
}) && ($options->{nf_conntrack_max
} > $max)) {
4224 $max = $options->{nf_conntrack_max
};
4225 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
4228 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
4229 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
4231 my $current = int(PVE
::Tools
::file_read_firstline
($filename_nf_conntrack_max) || $max);
4233 if ($current != $max) {
4234 my $hashsize = int($max/4);
4235 PVE
::ProcFSTools
::write_proc_entry
($filename_hashsize, $hashsize);
4236 PVE
::ProcFSTools
::write_proc_entry
($filename_nf_conntrack_max, $max);
4240 sub update_nf_conntrack_tcp_timeout_established
{
4241 my ($hostfw_conf) = @_;
4243 my $options = $hostfw_conf->{options
} || {};
4245 my $value = defined($options->{nf_conntrack_tcp_timeout_established
}) ?
$options->{nf_conntrack_tcp_timeout_established
} : 432000;
4247 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
4250 my $log_nf_conntrack_enabled = undef;
4251 sub update_nf_conntrack_logging
{
4252 my ($hostfw_conf) = @_;
4254 my $options = $hostfw_conf->{options
} || {};
4255 my $value = $options->{log_nf_conntrack
} || 0;
4256 if (!defined($log_nf_conntrack_enabled)
4257 || $value != $log_nf_conntrack_enabled)
4259 my $tmpfile = "$pve_fw_status_dir/log_nf_conntrack";
4260 PVE
::Tools
::file_set_contents
($tmpfile, $value);
4262 run_command
([qw(systemctl try-reload-or-restart pvefw-logger.service)]);
4263 $log_nf_conntrack_enabled = $value;
4267 sub remove_pvefw_chains
{
4269 PVE
::Firewall
::remove_pvefw_chains_iptables
("iptables");
4270 PVE
::Firewall
::remove_pvefw_chains_iptables
("ip6tables");
4271 PVE
::Firewall
::remove_pvefw_chains_ipset
();
4272 PVE
::Firewall
::remove_pvefw_chains_ebtables
();
4276 sub remove_pvefw_chains_iptables
{
4277 my ($iptablescmd) = @_;
4279 my ($chash, $hooks) = iptables_get_chains
($iptablescmd);
4280 my $cmdlist = "*filter\n";
4282 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
4284 $cmdlist .= "-D $h -j PVEFW-$h\n";
4288 foreach my $chain (keys %$chash) {
4289 $cmdlist .= "-F $chain\n";
4292 foreach my $chain (keys %$chash) {
4293 $cmdlist .= "-X $chain\n";
4295 $cmdlist .= "COMMIT\n";
4297 if($iptablescmd eq "ip6tables") {
4298 ip6tables_restore_cmdlist
($cmdlist);
4300 iptables_restore_cmdlist
($cmdlist);
4304 sub remove_pvefw_chains_ipset
{
4306 my $ipset_chains = ipset_get_chains
();
4310 foreach my $chain (keys %$ipset_chains) {
4311 $cmdlist .= "flush $chain\n";
4312 $cmdlist .= "destroy $chain\n";
4315 ipset_restore_cmdlist
($cmdlist) if $cmdlist;
4318 sub remove_pvefw_chains_ebtables
{
4319 # apply empty ruleset = remove all our chains
4320 ebtables_restore_cmdlist
(get_ebtables_cmdlist
({}));
4324 my $cluster_conf = load_clusterfw_conf
();
4325 my $cluster_options = $cluster_conf->{options
};
4326 my $enable = $cluster_options->{enable
};
4330 # load required modules here
4336 my $cluster_conf = load_clusterfw_conf
();
4337 my $cluster_options = $cluster_conf->{options
};
4339 if (!$cluster_options->{enable
}) {
4340 PVE
::Firewall
::remove_pvefw_chains
();
4344 my $hostfw_conf = load_hostfw_conf
($cluster_conf);
4346 my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile
($cluster_conf, $hostfw_conf);
4348 apply_ruleset
($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);