13 use Socket
qw(AF_INET AF_INET6 inet_ntop inet_pton);
14 use Storable
qw(dclone);
18 use PVE
::Exception
qw(raise raise_param_exc);
20 use PVE
::JSONSchema
qw(register_standard_option get_standard_option);
24 use PVE
::Tools
qw($IPV4RE $IPV6RE);
25 use PVE
::Tools
qw(run_command lock_file dir_glob_foreach);
27 my $pvefw_conf_dir = "/etc/pve/firewall";
28 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
30 # dynamically include PVE::QemuServer and PVE::LXC
31 # to avoid dependency problems
34 require PVE
::QemuServer
;
35 require PVE
::QemuConfig
;
36 $have_qemu_server = 1;
45 my $pve_fw_status_dir = "/var/lib/pve-firewall";
47 mkdir $pve_fw_status_dir; # make sure this exists
49 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
50 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
51 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
53 my $max_alias_name_length = 64;
54 my $max_ipset_name_length = 64;
55 my $max_group_name_length = 18;
57 my $PROTOCOLS_WITH_PORTS = {
59 udplite
=> 1, 136 => 1,
65 PVE
::JSONSchema
::register_format
('IPorCIDR', \
&pve_verify_ip_or_cidr
);
66 sub pve_verify_ip_or_cidr
{
67 my ($cidr, $noerr) = @_;
69 if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
70 return $cidr if Net
::IP-
>new($cidr);
71 return undef if $noerr;
72 die Net
::IP
::Error
() . "\n";
74 return undef if $noerr;
75 die "value does not look like a valid IP address or CIDR network\n";
78 PVE
::JSONSchema
::register_format
('IPorCIDRorAlias', \
&pve_verify_ip_or_cidr_or_alias
);
79 sub pve_verify_ip_or_cidr_or_alias
{
80 my ($cidr, $noerr) = @_;
82 return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
84 return pve_verify_ip_or_cidr
($cidr, $noerr);
87 PVE
::JSONSchema
::register_standard_option
('ipset-name', {
88 description
=> "IP set name.",
90 pattern
=> $ipset_name_pattern,
92 maxLength
=> $max_ipset_name_length,
95 PVE
::JSONSchema
::register_standard_option
('pve-fw-alias', {
96 description
=> "Alias name.",
98 pattern
=> $ip_alias_pattern,
100 maxLength
=> $max_alias_name_length,
103 PVE
::JSONSchema
::register_standard_option
('pve-fw-loglevel' => {
104 description
=> "Log level.",
106 enum
=> ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
110 PVE
::JSONSchema
::register_standard_option
('pve-security-group-name', {
111 description
=> "Security Group name.",
113 pattern
=> $security_group_name_pattern,
115 maxLength
=> $max_group_name_length,
118 my $feature_ipset_nomatch = 0;
120 my (undef, undef, $release) = POSIX
::uname
();
121 if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
122 my ($major, $minor) = ($1, $2);
123 $feature_ipset_nomatch = 1 if ($major > 3) ||
124 ($major == 3 && $minor >= 7);
129 my $nodename = PVE
::INotify
::nodename
();
130 my $hostfw_conf_filename = "/etc/pve/nodes/$nodename/host.fw";
132 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
134 my $default_log_level = 'nolog'; # avoid logs by default
135 my $global_log_ratelimit = '--limit 1/sec';
137 my $log_level_hash = {
159 # sport => port[,port[,port]].. or port:port
160 # dport => port[,port[,port]].. or port:port
161 # log => optional, loglevel
162 # logmsg => optional, logmsg - overwrites default
163 # iface_in => incomin interface
164 # iface_out => outgoing interface
165 # match => optional, overwrites generation of match
166 # target => optional, overwrites action
168 # we need to overwrite some macros for ipv6
169 my $pve_ipv6fw_macros = {
171 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'echo-request' },
173 'NeighborDiscovery' => [
174 "IPv6 neighbor solicitation, neighbor and router advertisement",
175 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'router-solicitation' },
176 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'router-advertisement' },
177 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'neighbor-solicitation' },
178 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'neighbor-advertisement' },
182 { action
=> 'PARAM', proto
=> 'udp', dport
=> '546:547', sport
=> '546:547' },
185 { action
=> 'PARAM', proto
=> 'udp', dport
=> '33434:33524' },
186 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'echo-request' },
190 # imported/converted from: /usr/share/shorewall/macro.*
191 my $pve_fw_macros = {
194 { action
=> 'PARAM', proto
=> 'udp', dport
=> '10080' },
195 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10080' },
198 "Auth (identd) traffic",
199 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '113' },
202 "Border Gateway Protocol traffic",
203 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '179' },
206 "BitTorrent traffic for BitTorrent 3.1 and earlier",
207 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6889' },
208 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
211 "BitTorrent traffic for BitTorrent 3.2 and later",
212 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6999' },
213 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
216 "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
217 # Legacy port for protocol v1
218 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6789' },
219 # New port for protocol v2
220 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3300' },
221 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6800:7300' },
224 "Concurrent Versions System pserver traffic",
225 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2401' },
228 "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
229 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1494' },
230 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1604' },
231 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2598' },
234 "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
235 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3689' },
236 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3689' },
239 "Distributed Checksum Clearinghouse spam filtering mechanism",
240 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6277' },
243 "Forwarded DHCP traffic",
244 { action
=> 'PARAM', proto
=> 'udp', dport
=> '67:68', sport
=> '67:68' },
247 "Domain Name System traffic (upd and tcp)",
248 { action
=> 'PARAM', proto
=> 'udp', dport
=> '53' },
249 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '53' },
252 "Distributed Compiler service",
253 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3632' },
256 "File Transfer Protocol",
257 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '21' },
260 "Finger protocol (RFC 742)",
261 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '79' },
264 "GNUnet secure peer-to-peer networking traffic",
265 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2086' },
266 { action
=> 'PARAM', proto
=> 'udp', dport
=> '2086' },
267 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1080' },
268 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1080' },
271 "Generic Routing Encapsulation tunneling protocol",
272 { action
=> 'PARAM', proto
=> '47' },
275 "Git distributed revision control traffic",
276 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9418' },
279 "OpenPGP HTTP keyserver protocol traffic",
280 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '11371' },
283 "Hypertext Transfer Protocol (WWW)",
284 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
287 "Hypertext Transfer Protocol (WWW) over SSL",
288 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
291 "Internet Cache Protocol V2 (Squid) traffic",
292 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3130' },
295 "AOL Instant Messenger traffic",
296 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5190' },
299 "Internet Message Access Protocol",
300 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '143' },
303 "Internet Message Access Protocol over SSL",
304 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '993' },
307 "IPIP capsulation traffic",
308 { action
=> 'PARAM', proto
=> '94' },
312 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
313 { action
=> 'PARAM', proto
=> '50' },
316 "IPsec authentication (AH) traffic",
317 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
318 { action
=> 'PARAM', proto
=> '51' },
321 "IPsec traffic and Nat-Traversal",
322 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500' },
323 { action
=> 'PARAM', proto
=> 'udp', dport
=> '4500' },
324 { action
=> 'PARAM', proto
=> '50' },
327 "Internet Relay Chat traffic",
328 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6667' },
331 "HP Jetdirect printing",
332 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9100' },
335 "Layer 2 Tunneling Protocol traffic",
336 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1701' },
339 "Lightweight Directory Access Protocol traffic",
340 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '389' },
343 "Secure Lightweight Directory Access Protocol traffic",
344 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '636' },
347 "Microsoft Notification Protocol",
348 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1863' },
351 "Microsoft SQL Server",
352 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1433' },
355 "Mail traffic (SMTP, SMTPS, Submission)",
356 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
357 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
358 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
362 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5353' },
365 "Munin networked resource monitoring traffic",
366 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '4949' },
370 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3306' },
373 "NNTP traffic (Usenet).",
374 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '119' },
377 "Encrypted NNTP traffic (Usenet)",
378 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '563' },
381 "Network Time Protocol (ntpd)",
382 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
385 "OSPF multicast traffic",
386 { action
=> 'PARAM', proto
=> '89' },
390 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1194' },
393 "Symantec PCAnywere (tm)",
394 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5632' },
395 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5631' },
398 "Proxmox Mail Gateway web interface",
399 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '8006' },
403 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '110' },
406 "Encrypted POP3 traffic",
407 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '995' },
410 "Point-to-Point Tunneling Protocol",
411 { action
=> 'PARAM', proto
=> '47' },
412 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1723' },
416 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
420 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5432' },
423 "Line Printer protocol printing",
424 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '515' },
427 "Microsoft Remote Desktop Protocol traffic",
428 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3389' },
431 "Routing Information Protocol (bidirectional)",
432 { action
=> 'PARAM', proto
=> 'udp', dport
=> '520' },
435 "BIND remote management protocol",
436 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '953' },
439 "Razor Antispam System",
440 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2703' },
443 "Remote time retrieval (rdate)",
444 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
448 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '873' },
451 "SANE network scanning",
452 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6566' },
455 "Microsoft SMB traffic",
456 { action
=> 'PARAM', proto
=> 'udp', dport
=> '135,445' },
457 { action
=> 'PARAM', proto
=> 'udp', dport
=> '137:139' },
458 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
459 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '135,139,445' },
462 "Samba Web Administration Tool",
463 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '901' },
466 "Simple Mail Transfer Protocol",
467 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
470 "Encrypted Simple Mail Transfer Protocol",
471 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
474 "Simple Network Management Protocol",
475 { action
=> 'PARAM', proto
=> 'udp', dport
=> '161:162' },
476 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '161' },
479 "Spam Assassin SPAMD traffic",
480 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '783' },
483 "Secure shell traffic",
484 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '22' },
487 "Subversion server (svnserve)",
488 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3690' },
491 "SixXS IPv6 Deployment and Tunnel Broker",
492 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3874' },
493 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3740' },
494 { action
=> 'PARAM', proto
=> '41' },
495 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5072,8374' },
498 "Squid web proxy traffic",
499 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3128' },
502 "Mail message submission traffic",
503 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
506 "Syslog protocol (RFC 5424) traffic",
507 { action
=> 'PARAM', proto
=> 'udp', dport
=> '514' },
508 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '514' },
511 "Trivial File Transfer Protocol traffic",
512 { action
=> 'PARAM', proto
=> 'udp', dport
=> '69' },
516 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '23' },
520 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '992' },
523 "RFC 868 Time protocol",
524 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
527 "Traceroute (for up to 30 hops) traffic",
528 { action
=> 'PARAM', proto
=> 'udp', dport
=> '33434:33524' },
529 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
532 "VNC traffic for VNC display's 0 - 99",
533 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5900:5999' },
536 "VNC traffic from Vncservers to Vncviewers in listen mode",
537 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5500' },
540 "WWW traffic (HTTP and HTTPS)",
541 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
542 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
545 "Web Cache/Proxy traffic (port 8080)",
546 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '8080' },
550 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10000' },
553 "Whois (nicname, RFC 3912) traffic",
554 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '43' },
558 my $pve_fw_parsed_macros;
559 my $pve_fw_macro_descr;
560 my $pve_fw_macro_ipversion = {};
561 my $pve_fw_preferred_macro_names = {};
563 my $FWACCEPTMARK_ON = "0x80000000/0x80000000";
564 my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
566 my $pve_std_chains = {};
567 my $pve_std_chains_conf = {};
568 $pve_std_chains_conf->{4} = {
569 'PVEFW-SET-ACCEPT-MARK' => [
570 { target
=> "-j MARK --set-mark $FWACCEPTMARK_ON" },
572 'PVEFW-DropBroadcast' => [
573 # same as shorewall 'Broadcast'
574 # simply DROP BROADCAST/MULTICAST/ANYCAST
575 # we can use this to reduce logging
576 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
577 { action
=> 'DROP', dsttype
=> 'MULTICAST' },
578 { action
=> 'DROP', dsttype
=> 'ANYCAST' },
579 { action
=> 'DROP', dest
=> '224.0.0.0/4' },
582 # same as shorewall 'reject'
583 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
584 { action
=> 'DROP', source
=> '224.0.0.0/4' },
585 { action
=> 'DROP', proto
=> 'icmp' },
586 { match
=> '-p tcp', target
=> '-j REJECT --reject-with tcp-reset' },
587 { match
=> '-p udp', target
=> '-j REJECT --reject-with icmp-port-unreachable' },
588 { match
=> '-p icmp', target
=> '-j REJECT --reject-with icmp-host-unreachable' },
589 { target
=> '-j REJECT --reject-with icmp-host-prohibited' },
592 # same as shorewall 'Drop', which is equal to DROP,
593 # but REJECT/DROP some packages to reduce logging,
594 # and ACCEPT critical ICMP types
595 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
596 # we are not interested in BROADCAST/MULTICAST/ANYCAST
597 { action
=> 'PVEFW-DropBroadcast' },
598 # ACCEPT critical ICMP types
599 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
600 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
601 # Drop packets with INVALID state
602 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
603 # Drop Microsoft SMB noise
604 { action
=> 'DROP', proto
=> 'udp', dport
=> '135,445' },
605 { action
=> 'DROP', proto
=> 'udp', dport
=> '137:139' },
606 { action
=> 'DROP', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
607 { action
=> 'DROP', proto
=> 'tcp', dport
=> '135,139,445' },
608 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
609 # Drop new/NotSyn traffic so that it doesn't get logged
610 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
612 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
615 # same as shorewall 'Reject', which is equal to Reject,
616 # but REJECT/DROP some packages to reduce logging,
617 # and ACCEPT critical ICMP types
618 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
619 # we are not interested in BROADCAST/MULTICAST/ANYCAST
620 { action
=> 'PVEFW-DropBroadcast' },
621 # ACCEPT critical ICMP types
622 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
623 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
624 # Drop packets with INVALID state
625 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
626 # Drop Microsoft SMB noise
627 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '135,445' },
628 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '137:139'},
629 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
630 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '135,139,445' },
631 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
632 # Drop new/NotSyn traffic so that it doesn't get logged
633 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
635 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
637 'PVEFW-tcpflags' => [
638 # same as shorewall tcpflags action.
639 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
640 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target
=> '-g PVEFW-logflags' },
641 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target
=> '-g PVEFW-logflags' },
642 { match
=> '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target
=> '-g PVEFW-logflags' },
643 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target
=> '-g PVEFW-logflags' },
644 { match
=> '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target
=> '-g PVEFW-logflags' },
647 # same as shorewall smurfs action
648 # Filter packets for smurfs (packets with a broadcast address as the source).
649 { match
=> '-s 0.0.0.0/32', target
=> '-j RETURN' }, # allow DHCP
650 { match
=> '-m addrtype --src-type BROADCAST', target
=> '-g PVEFW-smurflog' },
651 { match
=> '-s 224.0.0.0/4', target
=> '-g PVEFW-smurflog' },
653 'PVEFW-smurflog' => [
654 { action
=> 'DROP', logmsg
=> 'DROP: ' },
656 'PVEFW-logflags' => [
657 { action
=> 'DROP', logmsg
=> 'DROP: ' },
661 $pve_std_chains_conf->{6} = {
662 'PVEFW-SET-ACCEPT-MARK' => [
663 { target
=> "-j MARK --set-mark $FWACCEPTMARK_ON" },
665 'PVEFW-DropBroadcast' => [
666 # same as shorewall 'Broadcast'
667 # simply DROP BROADCAST/MULTICAST/ANYCAST
668 # we can use this to reduce logging
669 #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
670 # ipv6 addrtype does not work with kernel 2.6.32
671 #{ action => 'DROP', dsttype => 'MULTICAST' },
672 #{ action => 'DROP', dsttype => 'ANYCAST' },
673 { action
=> 'DROP', dest
=> 'ff00::/8' },
674 #{ action => 'DROP', dest => '224.0.0.0/4' },
677 { action
=> 'DROP', proto
=> 'icmpv6' },
678 { match
=> '-p tcp', target
=> '-j REJECT --reject-with tcp-reset' },
679 { match
=> '-p udp', target
=> '-j REJECT --reject-with icmp6-port-unreachable' },
680 { target
=> '-j REJECT --reject-with icmp6-adm-prohibited' },
683 # same as shorewall 'Drop', which is equal to DROP,
684 # but REJECT/DROP some packages to reduce logging,
685 # and ACCEPT critical ICMP types
686 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
687 # we are not interested in BROADCAST/MULTICAST/ANYCAST
688 { action
=> 'PVEFW-DropBroadcast' },
689 # ACCEPT critical ICMP types
690 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'destination-unreachable' },
691 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'time-exceeded' },
692 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'packet-too-big' },
693 # Drop packets with INVALID state
694 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
695 # Drop Microsoft SMB noise
696 { action
=> 'DROP', proto
=> 'udp', dport
=> '135,445' },
697 { action
=> 'DROP', proto
=> 'udp', dport
=> '137:139'},
698 { action
=> 'DROP', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
699 { action
=> 'DROP', proto
=> 'tcp', dport
=> '135,139,445' },
700 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
701 # Drop new/NotSyn traffic so that it doesn't get logged
702 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
704 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
707 # same as shorewall 'Reject', which is equal to Reject,
708 # but REJECT/DROP some packages to reduce logging,
709 # and ACCEPT critical ICMP types
710 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
711 # we are not interested in BROADCAST/MULTICAST/ANYCAST
712 { action
=> 'PVEFW-DropBroadcast' },
713 # ACCEPT critical ICMP types
714 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'destination-unreachable' },
715 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'time-exceeded' },
716 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'packet-too-big' },
717 # Drop packets with INVALID state
718 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
719 # Drop Microsoft SMB noise
720 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '135,445' },
721 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '137:139' },
722 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
723 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '135,139,445' },
724 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
725 # Drop new/NotSyn traffic so that it doesn't get logged
726 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
728 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
730 'PVEFW-tcpflags' => [
731 # same as shorewall tcpflags action.
732 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
733 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target
=> '-g PVEFW-logflags' },
734 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target
=> '-g PVEFW-logflags' },
735 { match
=> '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target
=> '-g PVEFW-logflags' },
736 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target
=> '-g PVEFW-logflags' },
737 { match
=> '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target
=> '-g PVEFW-logflags' },
739 'PVEFW-logflags' => [
740 { action
=> 'DROP', logmsg
=> 'DROP: ' },
744 # iptables -p icmp -h
745 my $icmp_type_names = {
748 'destination-unreachable' => 1,
749 'network-unreachable' => 1,
750 'host-unreachable' => 1,
751 'protocol-unreachable' => 1,
752 'port-unreachable' => 1,
753 'fragmentation-needed' => 1,
754 'source-route-failed' => 1,
755 'network-unknown' => 1,
757 'network-prohibited' => 1,
758 'host-prohibited' => 1,
759 'TOS-network-unreachable' => 1,
760 'TOS-host-unreachable' => 1,
761 'communication-prohibited' => 1,
762 'host-precedence-violation' => 1,
763 'precedence-cutoff' => 1,
764 'source-quench' => 1,
766 'network-redirect' => 1,
767 'host-redirect' => 1,
768 'TOS-network-redirect' => 1,
769 'TOS-host-redirect' => 1,
771 'router-advertisement' => 1,
772 'router-solicitation' => 1,
773 'time-exceeded' => 1,
774 'ttl-zero-during-transit' => 1,
775 'ttl-zero-during-reassembly' => 1,
776 'parameter-problem' => 1,
777 'ip-header-bad' => 1,
778 'required-option-missing' => 1,
779 'timestamp-request' => 1,
780 'timestamp-reply' => 1,
781 'address-mask-request' => 1,
782 'address-mask-reply' => 1,
785 # ip6tables -p icmpv6 -h
787 my $icmpv6_type_names = {
788 'destination-unreachable' => 1,
790 'communication-prohibited' => 1,
792 'address-unreachable' => 1,
793 'port-unreachable' => 1,
794 'failed-policy' => 1,
796 'packet-too-big' => 1,
797 'time-exceeded' => 1,
798 'ttl-zero-during-transit' => 1,
799 'ttl-zero-during-reassembly' => 1,
800 'parameter-problem' => 1,
802 'unknown-header-type' => 1,
803 'unknown-option' => 1,
806 'router-solicitation' => 1,
807 'router-advertisement' => 1,
808 'neighbor-solicitation' => 1,
809 'neighbour-solicitation' => 1,
810 'neighbor-advertisement' => 1,
811 'neighbour-advertisement' => 1,
815 sub init_firewall_macros
{
817 $pve_fw_parsed_macros = {};
820 my ($k, $macro) = @_;
821 my $lc_name = lc($k);
822 $pve_fw_macro_ipversion->{$k} = 0;
823 while (!ref($macro->[0])) {
824 my $desc = shift @$macro;
825 if ($desc eq 'ipv4only') {
826 $pve_fw_macro_ipversion->{$k} = 4;
827 } elsif ($desc eq 'ipv6only') {
828 $pve_fw_macro_ipversion->{$k} = 6;
830 $pve_fw_macro_descr->{$k} = $desc;
833 $pve_fw_preferred_macro_names->{$lc_name} = $k;
834 $pve_fw_parsed_macros->{$k} = $macro;
837 foreach my $k (keys %$pve_fw_macros) {
838 &$parse($k, $pve_fw_macros->{$k});
841 foreach my $k (keys %$pve_ipv6fw_macros) {
842 next if $pve_fw_parsed_macros->{$k};
843 &$parse($k, $pve_ipv6fw_macros->{$k});
844 $pve_fw_macro_ipversion->{$k} = 6;
848 init_firewall_macros
();
851 return wantarray ?
($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
856 sub get_etc_services
{
858 return $etc_services if $etc_services;
860 my $filename = "/etc/services";
862 my $fh = IO
::File-
>new($filename, O_RDONLY
);
864 warn "unable to read '$filename' - $!\n";
870 while (my $line = <$fh>) {
872 next if $line =~m/^#/;
873 next if ($line =~m/^\s*$/);
875 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp|sctp).*$!) {
876 $services->{byid
}->{$2}->{name
} = $1;
877 $services->{byid
}->{$2}->{port
} = $2;
878 $services->{byid
}->{$2}->{$3} = 1;
879 $services->{byname
}->{$1} = $services->{byid
}->{$2};
885 $etc_services = $services;
888 return $etc_services;
891 sub parse_protocol_file
{
894 my $fh = IO
::File-
>new($filename, O_RDONLY
);
896 warn "unable to read '$filename' - $!\n";
902 while (my $line = <$fh>) {
904 next if $line =~m/^#/;
905 next if ($line =~m/^\s*$/);
907 if ($line =~ m!^(\S+)\s+(\d+)(?:\s+.*)?$!) {
908 $protocols->{byid
}->{$2}->{name
} = $1;
909 $protocols->{byname
}->{$1} = $protocols->{byid
}->{$2};
920 sub get_etc_protocols
{
921 return $etc_protocols if $etc_protocols;
923 my $protocols = parse_protocol_file
('/etc/protocols');
925 # add special case for ICMP v6
926 $protocols->{byid
}->{icmpv6
}->{name
} = "icmpv6";
927 $protocols->{byname
}->{icmpv6
} = $protocols->{byid
}->{icmpv6
};
929 $etc_protocols = $protocols;
931 return $etc_protocols;
936 sub get_etc_ethertypes
{
937 $etc_ethertypes = parse_protocol_file
('/etc/ethertypes')
939 return $etc_ethertypes;
945 my ($new_value) = @_;
947 $__local_network = $new_value if defined($new_value);
949 return $__local_network if defined($__local_network);
952 my $nodename = PVE
::INotify
::nodename
();
954 my $ip = PVE
::Cluster
::remote_node_ip
($nodename);
956 my $testip = Net
::IP-
>new($ip);
958 my $isv6 = $testip->version == 6;
959 my $routes = $isv6 ? PVE
::ProcFSTools
::read_proc_net_ipv6_route
()
960 : PVE
::ProcFSTools
::read_proc_net_route
();
961 foreach my $entry (@$routes) {
964 $mask = $entry->{prefix
};
965 next if !$mask; # skip the default route...
967 $mask = $PVE::Network
::ipv4_mask_hash_localnet-
>{$entry->{mask
}};
968 next if !defined($mask);
970 my $cidr = "$entry->{dest}/$mask";
971 my $testnet = Net
::IP-
>new($cidr);
972 my $overlap = $testnet->overlaps($testip);
973 if ($overlap == $Net::IP
::IP_B_IN_A_OVERLAP
||
974 $overlap == $Net::IP
::IP_IDENTICAL
)
976 $__local_network = $cidr;
983 return $__local_network;
986 # ipset names are limited to 31 characters,
987 # and we use '-v4' or '-v6' to indicate IP versions,
988 # and we use '_swap' suffix for atomic update,
989 # for example PVEFW-${VMID}-${ipset_name}_swap
991 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
993 sub compute_ipset_chain_name
{
994 my ($vmid, $ipset_name, $ipversion) = @_;
996 $vmid = 0 if !defined($vmid);
998 my $id = "$vmid-${ipset_name}-v$ipversion";
1000 if (length($id) > $max_iptables_ipset_name_length) {
1001 $id = PVE
::Tools
::fnv31a_hex
($id);
1007 sub compute_ipfilter_ipset_name
{
1010 return "ipfilter-$iface";
1013 sub parse_address_list
{
1016 if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
1017 die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
1021 if ($str =~ m/^${ip_alias_pattern}$/) {
1022 die "alias name too long\n" if length($str) > $max_alias_name_length;
1030 my @elements = split(/,/, $str);
1031 die "extraneous commas in list\n" if $str ne join(',', @elements);
1032 foreach my $elem (@elements) {
1034 my $ip = Net
::IP-
>new($elem);
1036 my $err = Net
::IP
::Error
();
1037 die "invalid IP address: $err\n";
1039 $iprange = 1 if $elem =~ m/-/;
1041 my $new_ipversion = Net
::IP
::ip_is_ipv6
($ip->ip()) ?
6 : 4;
1043 die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
1044 if $ipversion && ($new_ipversion != $ipversion);
1046 $ipversion = $new_ipversion;
1049 die "you can't use a range in a list\n" if $iprange && $count > 1;
1054 sub parse_port_name_number_or_range
{
1055 my ($str, $dport) = @_;
1057 my $services = PVE
::Firewall
::get_etc_services
();
1061 my @elements = split(/,/, $str);
1062 die "extraneous commas in list\n" if $str ne join(',', @elements);
1063 foreach my $item (@elements) {
1064 if ($item =~ m/^([0-9]+):([0-9]+)$/) {
1066 my ($port1, $port2) = ($1, $2);
1067 die "invalid port '$port1'\n" if $port1 > 65535;
1068 die "invalid port '$port2'\n" if $port2 > 65535;
1069 die "backwards range '$port1:$port2' not allowed, did you mean '$port2:$port1'?\n" if $port1 > $port2;
1070 } elsif ($item =~ m/^([0-9]+)$/) {
1073 die "invalid port '$port'\n" if $port > 65535;
1075 if ($dport && $icmp_type_names->{$item}) {
1077 } elsif ($dport && $icmpv6_type_names->{$item}) {
1080 die "invalid port '$item'\n" if !$services->{byname
}->{$item};
1085 die "ICMP ports not allowed in port range\n" if $icmp_port && $count > 0;
1087 # I really don't like to use the word number here, but it's the only thing
1088 # that makes sense in a literal way. The range 1:100 counts as 2, not as
1089 # one and not as 100...
1090 die "too many entries in port list (> 15 numbers)\n"
1093 return (scalar(@elements) > 1);
1096 PVE
::JSONSchema
::register_format
('pve-fw-sport-spec', \
&pve_fw_verify_sport_spec
);
1097 sub pve_fw_verify_sport_spec
{
1100 parse_port_name_number_or_range
($portstr, 0);
1105 PVE
::JSONSchema
::register_format
('pve-fw-dport-spec', \
&pve_fw_verify_dport_spec
);
1106 sub pve_fw_verify_dport_spec
{
1109 parse_port_name_number_or_range
($portstr, 1);
1114 PVE
::JSONSchema
::register_format
('pve-fw-addr-spec', \
&pve_fw_verify_addr_spec
);
1115 sub pve_fw_verify_addr_spec
{
1118 parse_address_list
($list);
1123 PVE
::JSONSchema
::register_format
('pve-fw-protocol-spec', \
&pve_fw_verify_protocol_spec
);
1124 sub pve_fw_verify_protocol_spec
{
1127 my $protocols = get_etc_protocols
();
1129 die "unknown protocol '$proto'\n" if $proto &&
1130 !(defined($protocols->{byname
}->{$proto}) ||
1131 defined($protocols->{byid
}->{$proto}));
1137 # helper function for API
1139 sub copy_opject_with_digest
{
1142 my $sha = Digest
::SHA-
>new('sha1');
1145 foreach my $k (sort keys %$object) {
1146 my $v = $object->{$k};
1147 next if !defined($v);
1149 $sha->add($k, ':', $v, "\n");
1152 my $digest = $sha->hexdigest;
1154 $res->{digest
} = $digest;
1156 return wantarray ?
($res, $digest) : $res;
1159 sub copy_list_with_digest
{
1162 my $sha = Digest
::SHA-
>new('sha1');
1165 foreach my $entry (@$list) {
1167 foreach my $k (sort keys %$entry) {
1168 my $v = $entry->{$k};
1169 next if !defined($v);
1171 # Note: digest ignores refs ($rule->{errors})
1172 # since Digest::SHA expects a series of bytes,
1173 # we have to encode the value here to prevent errors when
1174 # using utf8 characters (eg. in comments)
1175 $sha->add($k, ':', encode_utf8
($v), "\n") if !ref($v); ;
1180 my $digest = $sha->hexdigest;
1182 foreach my $entry (@$res) {
1183 $entry->{digest
} = $digest;
1186 return wantarray ?
($res, $digest) : $res;
1189 our $cluster_option_properties = {
1191 description
=> "Enable or disable the firewall cluster wide.",
1197 description
=> "Enable ebtables rules cluster wide.",
1203 description
=> "Input policy.",
1206 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1209 description
=> "Output policy.",
1212 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1215 description
=> "Log ratelimiting settings",
1216 type
=> 'string', format
=> {
1219 description
=> 'Enable or disable log rate limiting',
1225 description
=> 'Frequency with which the burst bucket gets refilled',
1227 pattern
=> '[1-9][0-9]*\/(second|minute|hour|day)',
1228 format_description
=> 'rate',
1229 default => '1/second',
1235 description
=> 'Inital burst of packages which will get logged',
1243 our $host_option_properties = {
1245 description
=> "Enable host firewall rules.",
1249 log_level_in
=> get_standard_option
('pve-fw-loglevel', {
1250 description
=> "Log level for incoming traffic." }),
1251 log_level_out
=> get_standard_option
('pve-fw-loglevel', {
1252 description
=> "Log level for outgoing traffic." }),
1253 tcp_flags_log_level
=> get_standard_option
('pve-fw-loglevel', {
1254 description
=> "Log level for illegal tcp flags filter." }),
1255 smurf_log_level
=> get_standard_option
('pve-fw-loglevel', {
1256 description
=> "Log level for SMURFS filter." }),
1258 description
=> "Enable SMURFS filter.",
1263 description
=> "Filter illegal combinations of TCP flags.",
1268 nf_conntrack_max
=> {
1269 description
=> "Maximum number of tracked connections.",
1275 nf_conntrack_tcp_timeout_established
=> {
1276 description
=> "Conntrack established timeout.",
1282 nf_conntrack_tcp_timeout_syn_recv
=> {
1283 description
=> "Conntrack syn recv timeout.",
1291 description
=> "Enable NDP (Neighbor Discovery Protocol).",
1296 nf_conntrack_allow_invalid
=> {
1297 description
=> "Allow invalid packets on connection tracking.",
1302 protection_synflood
=> {
1303 description
=> "Enable synflood protection",
1308 protection_synflood_rate
=> {
1309 description
=> "Synflood protection rate syn/sec by ip src.",
1314 protection_synflood_burst
=> {
1315 description
=> "Synflood protection rate burst by ip src.",
1320 log_nf_conntrack
=> {
1321 description
=> "Enable logging of conntrack information.",
1328 our $vm_option_properties = {
1330 description
=> "Enable/disable firewall rules.",
1336 description
=> "Enable/disable MAC address filter.",
1342 description
=> "Enable DHCP.",
1348 description
=> "Enable NDP (Neighbor Discovery Protocol).",
1354 description
=> "Allow sending Router Advertisement.",
1359 description
=> "Enable default IP filters. " .
1360 "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1361 "for every interface. Such ipsets implicitly contain sane default " .
1362 "restrictions such as restricting IPv6 link local addresses to " .
1363 "the one derived from the interface's MAC address. For containers " .
1364 "the configured IP addresses will be implicitly added.",
1369 description
=> "Input policy.",
1372 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1375 description
=> "Output policy.",
1378 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1380 log_level_in
=> get_standard_option
('pve-fw-loglevel', {
1381 description
=> "Log level for incoming traffic." }),
1382 log_level_out
=> get_standard_option
('pve-fw-loglevel', {
1383 description
=> "Log level for outgoing traffic." }),
1388 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.";
1390 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.";
1392 my $rule_properties = {
1394 description
=> "Update rule at position <pos>.",
1399 digest
=> get_standard_option
('pve-config-digest'),
1401 description
=> "Rule type.",
1404 enum
=> ['in', 'out', 'group'],
1407 description
=> "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1410 pattern
=> $security_group_name_pattern,
1415 description
=> "Use predefined standard macro.",
1420 iface
=> get_standard_option
('pve-iface', {
1421 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.",
1425 description
=> "Restrict packet source address. $addr_list_descr",
1426 type
=> 'string', format
=> 'pve-fw-addr-spec',
1430 description
=> "Restrict packet destination address. $addr_list_descr",
1431 type
=> 'string', format
=> 'pve-fw-addr-spec',
1435 description
=> "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1436 type
=> 'string', format
=> 'pve-fw-protocol-spec',
1440 description
=> "Flag to enable/disable a rule.",
1445 log => get_standard_option
('pve-fw-loglevel', {
1446 description
=> "Log level for firewall rule.",
1449 description
=> "Restrict TCP/UDP source port. $port_descr",
1450 type
=> 'string', format
=> 'pve-fw-sport-spec',
1454 description
=> "Restrict TCP/UDP destination port. $port_descr",
1455 type
=> 'string', format
=> 'pve-fw-dport-spec',
1459 description
=> "Descriptive comment.",
1465 sub add_rule_properties
{
1466 my ($properties) = @_;
1468 foreach my $k (keys %$rule_properties) {
1469 my $h = $rule_properties->{$k};
1470 # copy data, so that we can modify later without side effects
1471 foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1477 sub delete_rule_properties
{
1478 my ($rule, $delete_str) = @_;
1480 foreach my $opt (PVE
::Tools
::split_list
($delete_str)) {
1481 raise_param_exc
({ 'delete' => "no such property ('$opt')"})
1482 if !defined($rule_properties->{$opt});
1483 raise_param_exc
({ 'delete' => "unable to delete required property '$opt'"})
1484 if $opt eq 'type' || $opt eq 'action';
1485 delete $rule->{$opt};
1491 my $apply_macro = sub {
1492 my ($macro_name, $param, $verify, $ipversion) = @_;
1494 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1495 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1497 if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1498 $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1501 # skip macros which are specific to another ipversion
1502 if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1503 return if $ipversion != $required;
1508 foreach my $templ (@$macro_rules) {
1510 my $param_used = {};
1511 foreach my $k (keys %$templ) {
1512 my $v = $templ->{$k};
1513 if ($v eq 'PARAM') {
1515 $param_used->{$k} = 1;
1516 } elsif ($v eq 'DEST') {
1517 $v = $param->{dest
};
1518 $param_used->{dest
} = 1;
1519 } elsif ($v eq 'SOURCE') {
1520 $v = $param->{source
};
1521 $param_used->{source
} = 1;
1525 my $msg = "missing parameter '$k' in macro '$macro_name'";
1526 raise_param_exc
({ macro => $msg }) if $verify;
1531 foreach my $k (keys %$param) {
1532 next if $k eq 'macro';
1533 next if !defined($param->{$k});
1534 next if $param_used->{$k};
1535 if (defined($rule->{$k})) {
1536 if ($rule->{$k} ne $param->{$k}) {
1537 my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1538 raise_param_exc
({ $k => $msg }) if $verify;
1542 $rule->{$k} = $param->{$k};
1545 push @$rules, $rule;
1551 my $rule_env_iface_lookup = {
1560 my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1562 my $allow_groups = $rule_env eq 'group' ?
0 : 1;
1564 my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1565 die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1567 my $errors = $rule->{errors
} || {};
1569 my $error_count = 0;
1571 my $add_error = sub {
1572 my ($param, $msg) = @_;
1574 raise_param_exc
({ $param => $msg }) if !$noerr;
1576 $errors->{$param} = $msg if !$errors->{$param};
1580 my $set_ip_version = sub {
1583 die "detected mixed ipv4/ipv6 adresses in rule\n"
1584 if $ipversion && ($vers != $ipversion);
1589 my $check_ipset_or_alias_property = sub {
1590 my ($name, $expected_ipversion) = @_;
1592 if (my $value = $rule->{$name}) {
1593 if ($value =~ m/^\+/) {
1594 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1595 &$add_error($name, "no such ipset '$1'")
1596 if !($cluster_conf->{ipset
}->{$1} || ($fw_conf && $fw_conf->{ipset
}->{$1}));
1599 &$add_error($name, "invalid ipset name '$value'");
1601 } elsif ($value =~ m/^${ip_alias_pattern}$/){
1602 my $alias = lc($value);
1603 &$add_error($name, "no such alias '$value'")
1604 if !($cluster_conf->{aliases
}->{$alias} || ($fw_conf && $fw_conf->{aliases
}->{$alias}));
1605 my $e = $fw_conf ?
$fw_conf->{aliases
}->{$alias} : undef;
1606 $e = $cluster_conf->{aliases
}->{$alias} if !$e && $cluster_conf;
1608 &$set_ip_version($e->{ipversion
});
1613 my $type = $rule->{type
};
1614 my $action = $rule->{action
};
1616 &$add_error('type', "missing property") if !$type;
1617 &$add_error('action', "missing property") if !$action;
1620 if ($type eq 'in' || $type eq 'out') {
1621 &$add_error('action', "unknown action '$action'")
1622 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1623 } elsif ($type eq 'group') {
1624 &$add_error('type', "security groups not allowed")
1626 &$add_error('action', "invalid characters in security group name")
1627 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1628 &$add_error('action', "security group '$action' does not exist")
1629 if $action && !defined($cluster_conf->{groups
}->{$action});
1631 &$add_error('type', "unknown rule type '$type'");
1635 if ($rule->{iface
}) {
1636 &$add_error('type', "parameter -i not allowed for this rule type")
1638 eval { PVE
::JSONSchema
::pve_verify_iface
($rule->{iface
}); };
1639 &$add_error('iface', $@) if $@;
1640 if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1641 &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1642 if $rule->{iface
} !~ m/^net(\d+)$/;
1646 if ($rule->{macro}) {
1647 if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1648 $rule->{macro} = $preferred_name;
1650 &$add_error('macro', "unknown macro '$rule->{macro}'");
1654 if ($rule->{proto
}) {
1655 eval { pve_fw_verify_protocol_spec
($rule->{proto
}); };
1656 &$add_error('proto', $@) if $@;
1657 &$set_ip_version(4) if $rule->{proto
} eq 'icmp';
1658 &$set_ip_version(6) if $rule->{proto
} eq 'icmpv6';
1661 if ($rule->{dport
}) {
1662 eval { parse_port_name_number_or_range
($rule->{dport
}, 1); };
1663 &$add_error('dport', $@) if $@;
1664 my $proto = $rule->{proto
};
1665 &$add_error('proto', "missing property - 'dport' requires this property")
1667 &$add_error('dport', "protocol '$proto' does not support ports")
1668 if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1669 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1672 if ($rule->{sport
}) {
1673 eval { parse_port_name_number_or_range
($rule->{sport
}, 0); };
1674 &$add_error('sport', $@) if $@;
1675 my $proto = $rule->{proto
};
1676 &$add_error('proto', "missing property - 'sport' requires this property")
1678 &$add_error('sport', "protocol '$proto' does not support ports")
1679 if !$PROTOCOLS_WITH_PORTS->{$proto};
1682 if ($rule->{source
}) {
1684 my $source_ipversion = parse_address_list
($rule->{source
});
1685 &$set_ip_version($source_ipversion);
1687 &$add_error('source', $@) if $@;
1688 &$check_ipset_or_alias_property('source', $ipversion);
1691 if ($rule->{dest
}) {
1693 my $dest_ipversion = parse_address_list
($rule->{dest
});
1694 &$set_ip_version($dest_ipversion);
1696 &$add_error('dest', $@) if $@;
1697 &$check_ipset_or_alias_property('dest', $ipversion);
1700 $rule->{ipversion
} = $ipversion if $ipversion;
1702 if ($rule->{macro} && !$error_count) {
1703 eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1705 if (ref($err) eq "PVE::Exception" && $err->{errors
}) {
1706 my $eh = $err->{errors
};
1707 foreach my $p (keys %$eh) {
1708 &$add_error($p, $eh->{$p});
1711 &$add_error('macro', "$err");
1716 $rule->{errors
} = $errors if $error_count;
1721 sub copy_rule_data
{
1722 my ($rule, $param) = @_;
1724 foreach my $k (keys %$rule_properties) {
1725 if (defined(my $v = $param->{$k})) {
1726 if ($v eq '' || $v eq '-') {
1737 sub rules_modify_permissions
{
1738 my ($rule_env) = @_;
1740 if ($rule_env eq 'host') {
1742 check
=> ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1744 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1746 check
=> ['perm', '/', [ 'Sys.Modify' ]],
1748 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1750 check
=> ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1757 sub rules_audit_permissions
{
1758 my ($rule_env) = @_;
1760 if ($rule_env eq 'host') {
1762 check
=> ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1764 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1766 check
=> ['perm', '/', [ 'Sys.Audit' ]],
1768 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1770 check
=> ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1778 my $bridge_firewall_enabled = 0;
1780 sub enable_bridge_firewall
{
1782 return if $bridge_firewall_enabled; # only once
1784 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1785 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1787 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1788 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/ipv4/tcp_syncookies", "1");
1790 $bridge_firewall_enabled = 1;
1793 sub iptables_restore_cmdlist
{
1794 my ($cmdlist, $table) = @_;
1796 $table = 'filter' if !$table;
1797 run_command
(['iptables-restore', '-T', $table, '-n'], input
=> $cmdlist, errmsg
=> "iptables_restore_cmdlist");
1800 sub ip6tables_restore_cmdlist
{
1801 my ($cmdlist, $table) = @_;
1803 $table = 'filter' if !$table;
1804 run_command
(['ip6tables-restore', '-T', $table, '-n'], input
=> $cmdlist, errmsg
=> "iptables_restore_cmdlist");
1807 sub ipset_restore_cmdlist
{
1810 run_command
(['ipset', 'restore'], input
=> $cmdlist, errmsg
=> "ipset_restore_cmdlist");
1813 sub ebtables_restore_cmdlist
{
1816 run_command
(['ebtables-restore'], input
=> $cmdlist, errmsg
=> "ebtables_restore_cmdlist");
1819 sub iptables_get_chains
{
1820 my ($iptablescmd, $t) = @_;
1822 $iptablescmd = "iptables" if !$iptablescmd;
1823 $t = 'filter' if !$t;
1827 # check what chains we want to track
1828 my $is_pvefw_chain = sub {
1831 return 1 if $name =~ m/^PVEFW-\S+$/;
1833 return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1835 return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1837 return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1838 return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1850 return if $line =~ m/^#/;
1851 return if $line =~ m/^\s*$/;
1853 if ($line =~ m/^\*(\S+)$/) {
1858 return if $table ne $t;
1860 if ($line =~ m/^:(\S+)\s/) {
1862 return if !&$is_pvefw_chain($chain);
1863 $res->{$chain} = "unknown";
1864 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1865 my ($chain, $sig) = ($1, $2);
1866 return if !&$is_pvefw_chain($chain);
1867 $res->{$chain} = $sig;
1868 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD|PREROUTING)\s+-j\s+PVEFW-\1$/) {
1871 # simply ignore the rest
1876 run_command
(["$iptablescmd-save"], outfunc
=> $parser);
1878 return wantarray ?
($res, $hooks) : $res;
1881 sub iptables_chain_digest
{
1883 my $digest = Digest
::SHA-
>new('sha1');
1884 foreach my $rule (@$rules) { # order is important
1885 $digest->add($rule);
1887 return $digest->b64digest;
1890 sub ipset_chain_digest
{
1893 my $digest = Digest
::SHA-
>new('sha1');
1894 foreach my $rule (sort @$rules) { # note: sorted
1895 $digest->add($rule);
1897 return $digest->b64digest;
1900 sub ipset_get_chains
{
1908 return if $line =~ m/^#/;
1909 return if $line =~ m/^\s*$/;
1910 if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1912 $line =~ s/\s+$//; # delete trailing white space
1913 push @{$chains->{$chain}}, $line;
1915 # simply ignore the rest
1920 run_command
(['ipset', 'save'], outfunc
=> $parser);
1922 # compute digest for each chain
1923 foreach my $chain (keys %$chains) {
1924 $res->{$chain} = ipset_chain_digest
($chains->{$chain});
1930 sub ebtables_get_chains
{
1936 return if $line =~ m/^#/;
1937 return if $line =~ m/^\s*$/;
1938 if ($line =~ m/^:(\S+)\s\S+$/) {
1939 # Make sure we know chains exist even if they're empty.
1940 $chains->{$1} //= [];
1941 } elsif ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
1944 push @{$chains->{$chain}}, $line;
1946 # simply ignore the rest
1951 run_command
(['ebtables-save'], outfunc
=> $parser);
1952 # compute digest for each chain and store rules as well
1953 foreach my $chain (keys %$chains) {
1954 $res->{$chain}->{rules
} = $chains->{$chain};
1955 $res->{$chain}->{sig
} = iptables_chain_digest
($chains->{$chain});
1960 # substitude action of rule according to action hash
1961 sub rule_substitude_action
{
1962 my ($rule, $actions) = @_;
1964 if (my $action = $rule->{action
}) {
1965 $rule->{action
} = $actions->{$action} if defined($actions->{$action});
1969 # generate a src or dst match
1970 # $dir(ection) is either d or s
1971 sub ipt_gen_src_or_dst_match
{
1972 my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
1977 } elsif ($dir eq 'd') {
1980 die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
1984 if ($adr =~ m/^\+/) {
1985 if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
1988 if ($fw_conf && $fw_conf->{ipset
}->{$name}) {
1989 $ipset_chain = compute_ipset_chain_name
($fw_conf->{vmid
}, $name, $ipversion);
1990 } elsif ($cluster_conf && $cluster_conf->{ipset
}->{$name}) {
1991 $ipset_chain = compute_ipset_chain_name
(0, $name, $ipversion);
1993 die "no such ipset '$name'\n";
1995 $match = "-m set --match-set ${ipset_chain} ${srcdst}";
1997 die "invalid security group name '$adr'\n";
1999 } elsif ($adr =~ m/^${ip_alias_pattern}$/){
2000 my $alias = lc($adr);
2001 my $e = $fw_conf ?
$fw_conf->{aliases
}->{$alias} : undef;
2002 $e = $cluster_conf->{aliases
}->{$alias} if !$e && $cluster_conf;
2003 die "no such alias '$adr'\n" if !$e;
2004 $match = "-${dir} $e->{cidr}";
2005 } elsif ($adr =~ m/\-/){
2006 $match = "-m iprange --${srcdst}-range $adr";
2008 $match = "-${dir} $adr";
2014 # convert a %rule to an array of iptables commands
2015 sub ipt_rule_to_cmds
{
2016 my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
2018 die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
2022 if (defined $rule->{match
}) {
2023 push @match, $rule->{match
};
2025 push @match, "-i $rule->{iface_in}" if $rule->{iface_in
};
2026 push @match, "-o $rule->{iface_out}" if $rule->{iface_out
};
2028 if ($rule->{source
}) {
2029 push @match, ipt_gen_src_or_dst_match
($rule->{source
}, 's', $ipversion, $cluster_conf, $fw_conf);
2031 if ($rule->{dest
}) {
2032 push @match, ipt_gen_src_or_dst_match
($rule->{dest
}, 'd', $ipversion, $cluster_conf, $fw_conf);
2035 if (my $proto = $rule->{proto
}) {
2036 push @match, "-p $proto";
2038 my $multidport = defined($rule->{dport
}) && parse_port_name_number_or_range
($rule->{dport
}, 1);
2039 my $multisport = defined($rule->{sport
}) && parse_port_name_number_or_range
($rule->{sport
}, 0);
2041 my $add_dport = sub {
2042 return if !defined($rule->{dport
});
2044 if ($proto eq 'icmp') {
2045 # Note: we use dport to store --icmp-type
2046 die "unknown icmp-type '$rule->{dport}'\n"
2047 if $rule->{dport
} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport
}});
2048 # values for icmp-type range between 0 and 255
2049 # higher values and iptables-restore fails
2050 die "invalid icmp-type '$rule->{dport}'\n" if ($rule->{dport
} =~ m/^(\d+)$/) && ($1 > 255);
2051 push @match, "-m icmp --icmp-type $rule->{dport}";
2052 } elsif ($proto eq 'icmpv6') {
2053 # Note: we use dport to store --icmpv6-type
2054 die "unknown icmpv6-type '$rule->{dport}'\n"
2055 if $rule->{dport
} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport
}});
2056 # values for icmpv6-type range between 0 and 255
2057 # higher values and iptables-restore fails
2058 die "invalid icmpv6-type '$rule->{dport}'\n" if ($rule->{dport
} =~ m/^(\d+)$/) && ($1 > 255);
2059 push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
2060 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
2061 die "protocol $proto does not have ports\n";
2062 } elsif ($multidport) {
2063 push @match, "--match multiport", "--dports $rule->{dport}";
2065 return if !$rule->{dport
};
2066 push @match, "--dport $rule->{dport}";
2070 my $add_sport = sub {
2071 return if !$rule->{sport
};
2073 die "protocol $proto does not have ports\n"
2074 if !$PROTOCOLS_WITH_PORTS->{$proto};
2076 push @match, "--match multiport", "--sports $rule->{sport}";
2078 push @match, "--sport $rule->{sport}";
2082 # order matters - single port before multiport!
2083 $add_dport->() if $multisport;
2085 $add_dport->() if !$multisport;
2086 } elsif ($rule->{dport
} || $rule->{sport
}) {
2087 die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport
};
2088 die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport
};
2091 push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype
};
2093 my $matchstr = scalar(@match) ?
join(' ', @match) : "";
2096 if (defined $rule->{target
}) {
2097 $targetstr = $rule->{target
};
2099 my $action = (defined $rule->{action
}) ?
$rule->{action
} : "";
2100 my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
2101 $targetstr = ($goto) ?
"-g $action" : "-j $action";
2105 my $log = $rule->{log};
2106 if (defined($log) && $log ne 'nolog') {
2107 my $loglevel = $log_level_hash->{$log};
2108 my $logaction = get_log_rule_base
($chain, $vmid, $rule->{logmsg
}, $loglevel);
2109 push @iptcmds, "-A $chain $matchstr $logaction";
2111 push @iptcmds, "-A $chain $matchstr $targetstr";
2115 sub ruleset_generate_rule
{
2116 my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf, $vmid) = @_;
2120 if ($rule->{macro}) {
2121 $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
2126 # update all or nothing
2128 foreach my $r (@$rules) {
2129 push @ipt_rule_cmds, ipt_rule_to_cmds
($r, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid);
2131 foreach my $c (@ipt_rule_cmds) {
2132 ruleset_add_ipt_cmd
($ruleset, $chain, $c);
2136 sub ruleset_create_chain
{
2137 my ($ruleset, $chain) = @_;
2139 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
2140 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
2142 die "chain '$chain' already exists\n" if $ruleset->{$chain};
2144 $ruleset->{$chain} = [];
2147 sub ruleset_chain_exist
{
2148 my ($ruleset, $chain) = @_;
2150 return $ruleset->{$chain} ?
1 : undef;
2153 # add an iptables command (like generated by ipt_rule_to_cmds) to a chain
2154 sub ruleset_add_ipt_cmd
{
2155 my ($ruleset, $chain, $iptcmd) = @_;
2157 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2159 push @{$ruleset->{$chain}}, $iptcmd;
2162 sub ruleset_addrule
{
2163 my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
2165 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2168 my $loglevel = $log_level_hash->{$log};
2169 my $logaction = get_log_rule_base
($chain, $vmid, $logmsg, $loglevel);
2170 push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
2172 # for stable ebtables digests avoid double-spaces to match ebtables-save output
2173 $match .= ' ' if length($match);
2174 push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
2177 sub ruleset_insertrule
{
2178 my ($ruleset, $chain, $match, $action, $log) = @_;
2180 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2182 unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2185 sub get_log_rule_base
{
2186 my ($chain, $vmid, $msg, $loglevel) = @_;
2188 $vmid = 0 if !defined($vmid);
2189 $msg = "" if !defined($msg);
2192 if (defined($global_log_ratelimit)) {
2193 $rlimit = "-m limit $global_log_ratelimit ";
2196 # Note: we use special format for prefix to pass further
2197 # info to log daemon (VMID, LOGLEVEL and CHAIN)
2198 return "${rlimit}-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2201 sub ruleset_add_chain_policy {
2202 my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2204 if ($policy eq 'ACCEPT') {
2206 my $rule = { action => 'ACCEPT' };
2207 rule_substitude_action($rule, { ACCEPT => $accept_action});
2208 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2210 } elsif ($policy eq 'DROP') {
2212 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop
");
2214 ruleset_addrule($ruleset, $chain, "", "-j DROP
", $loglevel, "policy
$policy: ", $vmid);
2215 } elsif ($policy eq 'REJECT') {
2216 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject
");
2218 ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject
", $loglevel, "policy
$policy: ", $vmid);
2221 die "internal error
: unknown policy
'$policy'";
2225 sub ruleset_chain_add_ndp {
2226 my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2227 return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2229 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-solicitation
", $accept);
2230 if ($direction ne 'OUT' || $options->{radv}) {
2231 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-advertisement
", $accept);
2233 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type neighbor-solicitation
", $accept);
2234 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type neighbor-advertisement
", $accept);
2237 sub ruleset_chain_add_conn_filters {
2238 my ($ruleset, $chain, $allow_invalid, $accept) = @_;
2240 if (!$allow_invalid) {
2241 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
", "-j DROP
");
2243 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
", "-j
$accept");
2246 sub ruleset_chain_add_input_filters {
2247 my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2249 if ($cluster_conf->{ipset}->{blacklist}){
2250 if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist
")) {
2251 ruleset_create_chain($ruleset, "PVEFW-blacklist
");
2252 ruleset_addrule($ruleset, "PVEFW-blacklist
", "", "-j DROP
", $loglevel, "DROP
: ", 0);
2254 my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2255 ruleset_addrule($ruleset, $chain, "-m set
--match-set
${ipset_chain
} src
", "-j PVEFW-blacklist
");
2258 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2259 if ($ipversion == 4) {
2260 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
,NEW
", "-j PVEFW-smurfs
");
2264 if ($options->{tcpflags}) {
2265 ruleset_addrule($ruleset, $chain, "-p tcp
", "-j PVEFW-tcpflags
");
2269 sub ruleset_create_vm_chain {
2270 my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2272 ruleset_create_chain($ruleset, $chain);
2273 my $accept = generate_nfqueue($options);
2275 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2276 if ($ipversion == 4) {
2277 if ($direction eq 'OUT') {
2278 ruleset_generate_rule($ruleset, $chain, $ipversion,
2279 { action => 'PVEFW-SET-ACCEPT-MARK',
2280 proto => 'udp', sport => 68, dport => 67 });
2282 ruleset_generate_rule($ruleset, $chain, $ipversion,
2283 { action => 'ACCEPT',
2284 proto => 'udp', sport => 67, dport => 68 });
2286 } elsif ($ipversion == 6) {
2287 if ($direction eq 'OUT') {
2288 ruleset_generate_rule($ruleset, $chain, $ipversion,
2289 { action => 'PVEFW-SET-ACCEPT-MARK',
2290 proto => 'udp', sport => 546, dport => 547 });
2292 ruleset_generate_rule($ruleset, $chain, $ipversion,
2293 { action => 'ACCEPT',
2294 proto => 'udp', sport => 547, dport => 546 });
2300 if ($direction eq 'OUT') {
2301 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2302 ruleset_addrule($ruleset, $chain, "-m mac
! --mac-source
$macaddr", "-j DROP
");
2304 if ($ipversion == 6 && !$options->{radv}) {
2305 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-advertisement
", "-j DROP
");
2307 if ($ipfilter_ipset) {
2308 ruleset_addrule($ruleset, $chain, "-m set
! --match-set
$ipfilter_ipset src
", "-j DROP
");
2310 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2313 my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j
$accept";
2314 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2317 sub ruleset_add_group_rule {
2318 my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2320 my $group = $rule->{action};
2321 my $group_chain = "GROUP-
$group-$direction";
2322 if(!ruleset_chain_exist($ruleset, $group_chain)){
2323 generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2326 if ($direction eq 'OUT' && $rule->{iface_out}) {
2327 ruleset_addrule($ruleset, $chain, "-o
$rule->{iface_out
}", "-j
$group_chain");
2328 } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2329 ruleset_addrule($ruleset, $chain, "-i
$rule->{iface_in
}", "-j
$group_chain");
2331 ruleset_addrule($ruleset, $chain, "", "-j
$group_chain");
2334 ruleset_addrule($ruleset, $chain, "-m mark
--mark
$FWACCEPTMARK_ON", "-j
$action");
2337 sub ruleset_generate_vm_rules {
2338 my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion, $vmid) = @_;
2340 my $lc_direction = lc($direction);
2342 my $in_accept = generate_nfqueue($options);
2344 foreach my $rule (@$rules) {
2345 next if $rule->{iface} && $rule->{iface} ne $netid;
2346 next if !$rule->{enable} || $rule->{errors};
2347 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2349 if ($rule->{type} eq 'group') {
2350 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2351 $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2353 next if $rule->{type} ne $lc_direction;
2355 $rule->{logmsg} = "$rule->{action
}: ";
2356 if ($direction eq 'OUT') {
2357 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" });
2358 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2360 rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject
" });
2361 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2369 sub generate_nfqueue {
2372 if ($options->{ips}) {
2373 my $action = "NFQUEUE
";
2374 if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2375 if (defined($3) && defined($1)) {
2376 $action .= " --queue-balance
$1:$3";
2377 } elsif (defined($1)) {
2378 $action .= " --queue-num
$1";
2381 $action .= " --queue-bypass
" if $feature_ipset_nomatch; #need kernel 3.10
2388 sub ruleset_generate_vm_ipsrules {
2389 my ($ruleset, $options, $direction, $iface) = @_;
2391 if ($options->{ips} && $direction eq 'IN') {
2392 my $nfqueue = generate_nfqueue($options);
2394 if (!ruleset_chain_exist($ruleset, "PVEFW-IPS
")) {
2395 ruleset_create_chain($ruleset, "PVEFW-IPS
");
2398 ruleset_addrule($ruleset, "PVEFW-IPS
", "-m physdev
--physdev-out
$iface --physdev-is-bridged
", "-j
$nfqueue");
2402 sub generate_tap_rules_direction {
2403 my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2405 my $lc_direction = lc($direction);
2407 my $rules = $vmfw_conf->{rules};
2409 my $options = $vmfw_conf->{options};
2410 my $loglevel = get_option_log_level($options, "log_level_
${lc_direction
}");
2412 my $tapchain = "$iface-$direction";
2414 my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2415 my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2416 if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2418 if ($options->{enable}) {
2419 # create chain with mac and ip filter
2420 ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2422 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion, $vmid);
2424 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2429 if ($direction eq 'OUT') {
2430 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2432 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2435 my $accept = generate_nfqueue($options);
2436 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : $accept;
2437 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2439 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : 'ACCEPT';
2440 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2443 # plug the tap chain to bridge chain
2444 if ($direction eq 'IN') {
2445 ruleset_addrule($ruleset, "PVEFW-FWBR-IN
",
2446 "-m physdev
--physdev-is-bridged
--physdev-out
$iface", "-j
$tapchain");
2448 ruleset_addrule($ruleset, "PVEFW-FWBR-OUT
",
2449 "-m physdev
--physdev-is-bridged
--physdev-in
$iface", "-j
$tapchain");
2453 sub enable_host_firewall {
2454 my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf) = @_;
2456 my $options = $hostfw_conf->{options};
2457 my $cluster_options = $cluster_conf->{options};
2458 my $rules = $hostfw_conf->{rules};
2459 my $cluster_rules = $cluster_conf->{rules};
2461 # corosync preparation
2462 my $corosync_rule = "-p udp
--dport
5404:5405";
2463 my $corosync_local_addresses = {};
2464 my $multicast_enabled;
2465 my $local_hostname = PVE::INotify::nodename();
2466 if (defined($corosync_conf)) {
2467 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2468 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2470 if ($node_name eq $local_hostname) {
2471 $corosync_local_addresses->{$key} = $node_ip;
2475 # allow multicast only if enabled in config
2476 my $corosync_transport = $corosync_conf->{main}->{totem}->{transport};
2477 $multicast_enabled = defined($corosync_transport) && $corosync_transport eq 'udp';
2480 # host inbound firewall
2481 my $chain = "PVEFW-HOST-IN
";
2482 ruleset_create_chain($ruleset, $chain);
2484 my $loglevel = get_option_log_level($options, "log_level_in
");
2486 ruleset_addrule($ruleset, $chain, "-i lo
", "-j ACCEPT
");
2488 ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2489 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2490 ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2492 # we use RETURN because we need to check also tap rules
2493 my $accept_action = 'RETURN';
2495 ruleset_addrule($ruleset, $chain, "-p igmp
", "-j
$accept_action"); # important for multicast
2497 # add host rules first, so that cluster wide rules can be overwritten
2498 foreach my $rule (@$rules, @$cluster_rules) {
2499 next if !$rule->{enable} || $rule->{errors};
2500 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2502 $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2505 $rule->{logmsg} = "$rule->{action
}: ";
2506 if ($rule->{type} eq 'group') {
2507 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2508 } elsif ($rule->{type} eq 'in') {
2509 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" });
2510 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2514 delete $rule->{iface_in};
2517 # allow standard traffic for management ipset (includes cluster network)
2518 my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management
", $ipversion);
2519 my $mngmntsrc = "-m set
--match-set
${mngmnt_ipset_chain
} src
";
2520 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
8006", "-j
$accept_action"); # PVE API
2521 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
5900:5999", "-j
$accept_action"); # PVE VNC Console
2522 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
3128", "-j
$accept_action"); # SPICE Proxy
2523 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
22", "-j
$accept_action"); # SSH
2524 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
60000:60050", "-j
$accept_action"); # Migration
2526 # corosync inbound rules
2527 if (defined($corosync_conf)) {
2528 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
$corosync_rule", "-j
$accept_action")
2529 if $multicast_enabled;
2531 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2532 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2533 my $destination = $corosync_local_addresses->{$key};
2535 if ($node_name ne $local_hostname && defined($destination)) {
2536 # accept only traffic on same ring
2537 ruleset_addrule($ruleset, $chain, "-d
$destination -s
$node_ip $corosync_rule", "-j
$accept_action");
2542 # implement input policy
2543 my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2544 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2546 # host outbound firewall
2547 $chain = "PVEFW-HOST-OUT
";
2548 ruleset_create_chain($ruleset, $chain);
2550 $loglevel = get_option_log_level($options, "log_level_out
");
2552 ruleset_addrule($ruleset, $chain, "-o lo
", "-j ACCEPT
");
2554 ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2556 # we use RETURN because we may want to check other thigs later
2557 $accept_action = 'RETURN';
2558 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j
$accept_action");
2560 ruleset_addrule($ruleset, $chain, "-p igmp
", "-j
$accept_action"); # important for multicast
2562 # add host rules first, so that cluster wide rules can be overwritten
2563 foreach my $rule (@$rules, @$cluster_rules) {
2564 next if !$rule->{enable} || $rule->{errors};
2565 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2567 $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2569 $rule->{logmsg} = "$rule->{action
}: ";
2570 if ($rule->{type} eq 'group') {
2571 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2572 } elsif ($rule->{type} eq 'out') {
2573 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" });
2574 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2578 delete $rule->{iface_out};
2581 # allow standard traffic on cluster network
2582 my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2583 my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2585 if ($localnet && ($ipversion == $localnet_ver)) {
2586 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
8006", "-j
$accept_action"); # PVE API
2587 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
22", "-j
$accept_action"); # SSH
2588 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
5900:5999", "-j
$accept_action"); # PVE VNC Console
2589 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
3128", "-j
$accept_action"); # SPICE Proxy
2592 # corosync outbound rules
2593 if (defined($corosync_conf)) {
2594 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
$corosync_rule", "-j
$accept_action")
2595 if $multicast_enabled;
2597 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2598 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2599 my $source = $corosync_local_addresses->{$key};
2601 if ($node_name ne $local_hostname && defined($source)) {
2602 # accept only traffic on same ring
2603 ruleset_addrule($ruleset, $chain, "-s
$source -d
$node_ip $corosync_rule", "-j
$accept_action");
2608 # implement output policy
2609 $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2610 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2612 ruleset_addrule($ruleset, "PVEFW-OUTPUT
", "", "-j PVEFW-HOST-OUT
");
2613 ruleset_addrule($ruleset, "PVEFW-INPUT
", "", "-j PVEFW-HOST-IN
");
2616 sub generate_group_rules {
2617 my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2619 my $rules = $cluster_conf->{groups}->{$group};
2622 warn "no such security group
'$group'\n";
2623 $rules = []; # create empty chain
2626 my $chain = "GROUP-
${group
}-IN
";
2628 ruleset_create_chain($ruleset, $chain);
2629 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2631 foreach my $rule (@$rules) {
2632 next if $rule->{type} ne 'in';
2633 next if !$rule->{enable} || $rule->{errors};
2634 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2635 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" });
2636 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2639 $chain = "GROUP-
${group
}-OUT
";
2641 ruleset_create_chain($ruleset, $chain);
2642 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2644 foreach my $rule (@$rules) {
2645 next if $rule->{type} ne 'out';
2646 next if !$rule->{enable} || $rule->{errors};
2647 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2648 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2649 # check also other tap rules later
2650 rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject
" });
2651 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2656 my $valid_netdev_names = {};
2657 for (my $i = 0; $i < $MAX_NETS; $i++) {
2658 $valid_netdev_names->{"net
$i"} = 1;
2661 sub get_mark_values {
2662 my ($value, $mask) = @_;
2663 $value = hex($value) if $value =~ /^0x/;
2664 $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2665 $mask = 0xffffffff if !defined($mask);
2666 return ($value, $mask);
2670 my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env) = @_;
2672 my $orig_line = $line;
2676 # we can add single line comments to the end of the rule
2677 if ($line =~ s/#\s*(.*?)\s*$//) {
2678 $rule->{comment} = decode('utf8', $1);
2681 # we can disable a rule when prefixed with '|'
2683 $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2685 $line =~ s/^(\S+)\s+(\S+)\s*// ||
2686 die "unable to parse rule
: $line\n";
2688 $rule->{type} = lc($1);
2689 $rule->{action} = $2;
2691 if ($rule->{type} eq 'in' || $rule->{type} eq 'out') {
2692 if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2693 $rule->{macro} = $1;
2694 $rule->{action} = $2;
2698 while (length($line)) {
2699 if ($line =~ s/^-i (\S+)\s*//) {
2700 $rule->{iface} = $1;
2704 last if $rule->{type} eq 'group';
2706 if ($line =~ s/^-p (\S+)\s*//) {
2707 $rule->{proto} = $1;
2711 if ($line =~ s/^-dport (\S+)\s*//) {
2712 $rule->{dport} = $1;
2716 if ($line =~ s/^-sport (\S+)\s*//) {
2717 $rule->{sport} = $1;
2720 if ($line =~ s/^-source (\S+)\s*//) {
2721 $rule->{source} = $1;
2724 if ($line =~ s/^-dest (\S+)\s*//) {
2728 if ($line =~ s/^-log (emerg|alert|crit|err|warning|notice|info|debug|nolog)\s*//) {
2736 die "unable to parse rule parameters
: $line\n" if length($line);
2738 $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2739 if ($rule->{errors}) {
2740 # The verbose flag really means we're running from the CLI and want
2741 # output on the console - in the other case we really want such errors
2742 # to go into the syslog instead.
2743 my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2744 $log->("$prefix - errors
in rule parameters
: $orig_line\n");
2745 foreach my $p (keys %{$rule->{errors}}) {
2746 $log->(" $p: $rule->{errors
}->{$p}\n");
2753 sub verify_ethertype {
2755 my $types = get_etc_ethertypes();
2756 die "unknown ethernet protocol type
: $value\n"
2757 if !defined($types->{byname}->{$value}) &&
2758 !defined($types->{byid}->{$value});
2761 sub parse_vmfw_option {
2766 my $loglevels = "emerg
|alert
|crit
|err
|warning
|notice
|info
|debug
|nolog
";
2768 if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2771 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2773 $value = $2 ? lc($3) : '';
2774 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2777 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2780 } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
2783 verify_ethertype($_) foreach split(/\s*,\s*/, $value);
2785 die "can
't parse option '$line'\n"
2788 return ($opt, $value);
2791 sub parse_hostfw_option {
2796 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2798 if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid|protection_synflood):\s*(0|1)\s*$/i) {
2801 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2803 $value = $2 ? lc($3) : '';
2804 } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established|nf_conntrack_tcp_timeout_syn_recv|protection_synflood_rate|protection_synflood_burst|protection_limit):\s*(\d+)\s*$/i) {
2808 die "can't parse option
'$line'\n"
2811 return ($opt, $value);
2814 sub parse_clusterfw_option {
2819 if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2822 if (($value > 1) && ((time() - $value) > 60)) {
2825 } elsif ($line =~ m/^(ebtables):\s*(0|1)\s*$/i) {
2828 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2831 } elsif ($line =~ m/^(log_ratelimit):\s*(\S+)\s*$/) {
2835 die "can
't parse option '$line'\n"
2838 return ($opt, $value);
2842 my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2844 my $alias = lc($cidr);
2845 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2846 $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2848 die "no such alias '$cidr'\n" if !$e;;
2850 return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2853 sub parse_ip_or_cidr {
2858 if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2861 } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2865 die "value does not look like a valid IP address or CIDR network\n";
2868 return wantarray ? ($cidr, $ipversion) : $cidr;
2874 # we can add single line comments to the end of the line
2875 my $comment = decode('utf8
', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2877 if ($line =~ m/^(\S+)\s(\S+)$/) {
2878 my ($name, $cidr) = ($1, $2);
2881 ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2886 ipversion => $ipversion,
2888 $data->{comment} = $comment if $comment;
2895 sub generic_fw_config_parser {
2896 my ($filename, $cluster_conf, $empty_conf, $rule_env) = @_;
2901 my $res = $empty_conf;
2904 if ($filename =~ m!^/etc/pve/(.*)$!) {
2905 $raw = PVE::Cluster::get_config($1);
2907 $raw = eval { PVE::Tools::file_get_contents($filename) }; # ignore errors
2911 my $curr_group_keys = {};
2914 while ($raw =~ /^\h*(.*?)\h*$/gm) {
2917 next if $line =~ m/^#/;
2918 next if $line =~ m/^\s*$/;
2921 my $prefix = "$filename (line $linenr)";
2923 if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2924 $section = 'options
';
2928 if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2929 $section = 'aliases
';
2933 if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2934 $section = 'groups
';
2938 die "security group name too long\n" if length($group) > $max_group_name_length;
2939 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2942 ($section, $group, $comment) = undef;
2943 warn "$prefix: $err";
2947 $res->{$section}->{$group} = [];
2948 $res->{group_comments}->{$group} = decode('utf8
', $comment)
2953 if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2958 if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2963 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2964 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2967 ($section, $group, $comment) = undef;
2968 warn "$prefix: $err";
2972 $res->{$section}->{$group} = [];
2973 $curr_group_keys = {};
2975 $res->{ipset_comments}->{$group} = decode('utf8
', $comment)
2981 warn "$prefix: skip line - no section\n";
2985 if ($section eq 'options
') {
2988 if ($rule_env eq 'cluster
') {
2989 ($opt, $value) = parse_clusterfw_option($line);
2990 } elsif ($rule_env eq 'host
') {
2991 ($opt, $value) = parse_hostfw_option($line);
2993 ($opt, $value) = parse_vmfw_option($line);
2995 $res->{options}->{$opt} = $value;
2997 warn "$prefix: $@" if $@;
2998 } elsif ($section eq 'aliases
') {
3000 my $data = parse_alias($line);
3001 $res->{aliases}->{lc($data->{name})} = $data;
3003 warn "$prefix: $@" if $@;
3004 } elsif ($section eq 'rules
') {
3006 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env); };
3008 warn "$prefix: $err";
3011 push @{$res->{$section}}, $rule;
3012 } elsif ($section eq 'groups
') {
3014 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group
'); };
3016 warn "$prefix: $err";
3019 push @{$res->{$section}->{$group}}, $rule;
3020 } elsif ($section eq 'ipset
') {
3021 # we can add single line comments to the end of the rule
3022 my $comment = decode('utf8
', $1) if $line =~ s/#\s*(.*?)\s*$//;
3024 $line =~ m/^(\!)?\s*(\S+)\s*$/;
3029 if ($nomatch && !$feature_ipset_nomatch) {
3030 $errors->{nomatch} = "nomatch not supported by kernel";
3034 if ($cidr =~ m/^${ip_alias_pattern}$/) {
3035 resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
3037 $cidr = parse_ip_or_cidr($cidr);
3039 die "duplicate ipset entry for '$cidr'\n"
3040 if defined($curr_group_keys->{$cidr});
3044 $errors->{cidr} = $err;
3047 if ($cidr =~ m!/0+$!) {
3048 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
3051 my $entry = { cidr => $cidr };
3052 $entry->{nomatch} = 1 if $nomatch;
3053 $entry->{comment} = $comment if $comment;
3054 $entry->{errors} = $errors if $errors;
3056 if ($verbose && $errors) {
3057 warn "$prefix - errors in ipset '$group': $line\n";
3058 foreach my $p (keys %{$errors}) {
3059 warn " $p: $errors->{$p}\n";
3063 push @{$res->{$section}->{$group}}, $entry;
3064 $curr_group_keys->{$cidr} = 1;
3066 warn "$prefix: skip line - unknown section\n";
3074 # this is only used to prevent concurrent runs of rule compilation/application
3075 # see lock_*_conf for cfs locks protectiong config modification
3077 my ($code, @param) = @_;
3081 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
3088 sub read_local_vm_config {
3093 my $vmdata = { qemu => $qemu, lxc => $lxc };
3095 my $vmlist = PVE::Cluster::get_vmlist();
3096 return $vmdata if !$vmlist || !$vmlist->{ids};
3097 my $ids = $vmlist->{ids};
3099 foreach my $vmid (keys %$ids) {
3100 next if !$vmid; # skip VE0
3101 my $d = $ids->{$vmid};
3102 next if !$d->{node} || $d->{node} ne $nodename;
3103 next if !$d->{type};
3104 if ($d->{type} eq 'qemu
') {
3105 if ($have_qemu_server) {
3106 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
3107 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3108 $qemu->{$vmid} = $conf;
3111 } elsif ($d->{type} eq 'lxc
') {
3113 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
3114 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3115 $lxc->{$vmid} = $conf;
3124 sub lock_vmfw_conf {
3125 my ($vmid, $timeout, $code, @param) = @_;
3127 die "can't
lock VM firewall config
for undefined VMID
\n"
3130 my $res = PVE::Cluster::cfs_lock_firewall("vm-
$vmid", $timeout, $code, @param);
3136 sub load_vmfw_conf {
3137 my ($cluster_conf, $rule_env, $vmid, $dir) = @_;
3139 $dir = $pvefw_conf_dir if !defined($dir);
3140 my $filename = "$dir/$vmid.fw
";
3147 ipset_comments => {},
3150 my $vmfw_conf = generic_fw_config_parser($filename, $cluster_conf, $empty_conf, $rule_env);
3151 $vmfw_conf->{vmid} = $vmid;
3156 my $format_rules = sub {
3157 my ($rules, $allow_iface) = @_;
3161 foreach my $rule (@$rules) {
3162 if ($rule->{type} eq 'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
3163 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
3164 $raw .= uc($rule->{type});
3165 if ($rule->{macro}) {
3166 $raw .= " $rule->{macro}($rule->{action
})";
3168 $raw .= " " . $rule->{action};
3170 if ($allow_iface && $rule->{iface}) {
3171 $raw .= " -i
$rule->{iface
}";
3174 if ($rule->{type} ne 'group') {
3175 $raw .= " -source
$rule->{source
}" if $rule->{source};
3176 $raw .= " -dest
$rule->{dest
}" if $rule->{dest};
3177 $raw .= " -p
$rule->{proto
}" if $rule->{proto};
3178 $raw .= " -dport
$rule->{dport
}" if $rule->{dport};
3179 $raw .= " -sport
$rule->{sport
}" if $rule->{sport};
3180 $raw .= " -log $rule->{log}" if $rule->{log};
3183 $raw .= " # " . encode('utf8', $rule->{comment})
3184 if $rule->{comment
} && $rule->{comment
} !~ m/^\s*$/;
3187 die "unknown rule type '$rule->{type}'";
3194 my $format_options = sub {
3199 $raw .= "[OPTIONS]\n\n";
3200 foreach my $opt (keys %$options) {
3201 $raw .= "$opt: $options->{$opt}\n";
3208 my $format_aliases = sub {
3213 $raw .= "[ALIASES]\n\n";
3214 foreach my $k (keys %$aliases) {
3215 my $e = $aliases->{$k};
3216 $raw .= "$e->{name} $e->{cidr}";
3217 $raw .= " # " . encode
('utf8', $e->{comment
})
3218 if $e->{comment
} && $e->{comment
} !~ m/^\s*$/;
3226 my $format_ipsets = sub {
3231 foreach my $ipset (sort keys %{$fw_conf->{ipset
}}) {
3232 if (my $comment = $fw_conf->{ipset_comments
}->{$ipset}) {
3233 my $utf8comment = encode
('utf8', $comment);
3234 $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3236 $raw .= "[IPSET $ipset]\n\n";
3238 my $options = $fw_conf->{ipset
}->{$ipset};
3241 foreach my $entry (@$options) {
3242 my $cidr = $entry->{cidr
};
3243 if (defined($nethash->{$cidr})) {
3244 warn "ignoring duplicate ipset entry '$cidr'\n";
3248 $nethash->{$cidr} = $entry;
3251 foreach my $cidr (sort keys %$nethash) {
3252 my $entry = $nethash->{$cidr};
3253 my $line = $entry->{nomatch
} ?
'!' : '';
3254 $line .= $entry->{cidr
};
3255 $line .= " # " . encode
('utf8', $entry->{comment
})
3256 if $entry->{comment
} && $entry->{comment
} !~ m/^\s*$/;
3266 sub save_vmfw_conf
{
3267 my ($vmid, $vmfw_conf) = @_;
3271 my $options = $vmfw_conf->{options
};
3272 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3274 my $aliases = $vmfw_conf->{aliases
};
3275 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3277 $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset
};
3279 my $rules = $vmfw_conf->{rules
} || [];
3280 if ($rules && scalar(@$rules)) {
3281 $raw .= "[RULES]\n\n";
3282 $raw .= &$format_rules($rules, 1);
3286 my $filename = "$pvefw_conf_dir/$vmid.fw";
3288 mkdir $pvefw_conf_dir;
3289 PVE
::Tools
::file_set_contents
($filename, $raw);
3295 sub remove_vmfw_conf
{
3298 my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3300 unlink $vmfw_conffile;
3303 sub clone_vmfw_conf
{
3304 my ($vmid, $newid) = @_;
3306 my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3307 my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3309 lock_vmfw_conf
($newid, 10, sub {
3310 if (-f
$clonevm_conffile) {
3311 unlink $clonevm_conffile;
3313 if (-f
$sourcevm_conffile) {
3314 my $data = PVE
::Tools
::file_get_contents
($sourcevm_conffile);
3315 PVE
::Tools
::file_set_contents
($clonevm_conffile, $data);
3320 sub read_vm_firewall_configs
{
3321 my ($cluster_conf, $vmdata, $dir) = @_;
3323 my $vmfw_configs = {};
3325 foreach my $vmid (keys %{$vmdata->{qemu
}}) {
3326 my $vmfw_conf = load_vmfw_conf
($cluster_conf, 'vm', $vmid, $dir);
3327 next if !$vmfw_conf->{options
}; # skip if file does not exist
3328 $vmfw_configs->{$vmid} = $vmfw_conf;
3330 foreach my $vmid (keys %{$vmdata->{lxc
}}) {
3331 my $vmfw_conf = load_vmfw_conf
($cluster_conf, 'ct', $vmid, $dir);
3332 next if !$vmfw_conf->{options
}; # skip if file does not exist
3333 $vmfw_configs->{$vmid} = $vmfw_conf;
3336 return $vmfw_configs;
3339 sub get_option_log_level
{
3340 my ($options, $k) = @_;
3342 my $v = $options->{$k};
3343 $v = $default_log_level if !defined($v);
3345 return undef if $v eq '' || $v eq 'nolog';
3347 return $v if defined($log_level_hash->{$v});
3349 warn "unknown log level ($k = '$v')\n";
3354 sub generate_std_chains
{
3355 my ($ruleset, $options, $ipversion) = @_;
3357 my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3359 my $loglevel = get_option_log_level
($options, 'smurf_log_level');
3360 my $chain = 'PVEFW-smurflog';
3361 if ( $std_chains->{$chain} ) {
3362 foreach my $r (@{$std_chains->{$chain}}) {
3363 $r->{log} = $loglevel;
3367 # same as shorewall logflags action.
3368 $loglevel = get_option_log_level
($options, 'tcp_flags_log_level');
3369 $chain = 'PVEFW-logflags';
3370 if ( $std_chains->{$chain} ) {
3371 foreach my $r (@{$std_chains->{$chain}}) {
3372 $r->{log} = $loglevel;
3376 foreach my $chain (keys %$std_chains) {
3377 ruleset_create_chain
($ruleset, $chain);
3378 foreach my $rule (@{$std_chains->{$chain}}) {
3380 ruleset_generate_rule
($ruleset, $chain, $ipversion, $rule, 0);
3382 die "rule $rule as string - should not happen";
3388 sub generate_ipset_chains
{
3389 my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3391 foreach my $ipset (keys %{$ipsets}) {
3393 my $options = $ipsets->{$ipset};
3395 if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3396 if (my $ips = $device_ips->{$1}) {
3397 $options = [@$options, @$ips];
3403 foreach my $entry (@$options) {
3404 next if $entry->{errors
}; # skip entries with errors
3407 if ($entry->{cidr
} =~ m/^${ip_alias_pattern}$/) {
3408 ($cidr, $ver) = resolve_alias
($clusterfw_conf, $fw_conf, $entry->{cidr
});
3410 ($cidr, $ver) = parse_ip_or_cidr
($entry->{cidr
});
3412 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3414 # ip_compress_address takes an address only, no CIDR
3415 my ($addr, $prefix_len) = ($cidr =~ m
@^([^/]*)(/.*)?
$@);
3416 $cidr = lc(Net
::IP
::ip_compress_address
($addr, 6));
3417 $cidr .= $prefix_len if defined($prefix_len);
3423 $nethash->{$ver}->{$cidr} = { cidr
=> $cidr, nomatch
=> $entry->{nomatch
} };
3428 foreach my $ipversion (4, 6) {
3429 my $data = $nethash->{$ipversion};
3431 my $name = compute_ipset_chain_name
($fw_conf->{vmid
}, $ipset, $ipversion);
3433 my $hashsize = scalar(@$options);
3434 if ($hashsize <= 64) {
3437 $hashsize = round_powerof2
($hashsize);
3440 my $family = $ipversion == "6" ?
"inet6" : "inet";
3442 $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3444 foreach my $cidr (sort keys %$data) {
3445 my $entry = $data->{$cidr};
3447 my $cmd = "add $name $cidr";
3448 if ($entry->{nomatch
}) {
3449 if ($feature_ipset_nomatch) {
3450 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3452 warn "ignore !$cidr - nomatch not supported by kernel\n";
3455 push @{$ipset_ruleset->{$name}}, $cmd;
3462 sub round_powerof2
{
3466 $int |= $int >> $_ foreach (1,2,4,8,16);
3470 my $set_global_log_ratelimit = sub {
3471 my $cluster_opts = shift;
3473 $global_log_ratelimit = '--limit 1/sec';
3474 if (defined(my $log_rlimit = $cluster_opts->{log_ratelimit
})) {
3475 my $ll_format = $cluster_option_properties->{log_ratelimit
}->{format
};
3476 my $limit = PVE
::JSONSchema
::parse_property_string
($ll_format, $log_rlimit);
3478 if ($limit->{enable
}) {
3479 if (my $rate = $limit->{rate
}) {
3480 $global_log_ratelimit = "--limit $rate";
3482 if (my $burst = $limit->{burst
}) {
3483 $global_log_ratelimit .= " --limit-burst $burst";
3486 $global_log_ratelimit = undef;
3491 sub lock_clusterfw_conf
{
3492 my ($timeout, $code, @param) = @_;
3494 my $res = PVE
::Cluster
::cfs_lock_firewall
("cluster", $timeout, $code, @param);
3500 sub load_clusterfw_conf
{
3501 my ($filename) = @_;
3503 $filename = $clusterfw_conf_filename if !defined($filename);
3509 group_comments
=> {},
3511 ipset_comments
=> {},
3514 my $cluster_conf = generic_fw_config_parser
($filename, $empty_conf, $empty_conf, 'cluster');
3515 $set_global_log_ratelimit->($cluster_conf->{options
});
3517 return $cluster_conf;
3520 sub save_clusterfw_conf
{
3521 my ($cluster_conf) = @_;
3525 my $options = $cluster_conf->{options
};
3526 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3528 my $aliases = $cluster_conf->{aliases
};
3529 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3531 $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset
};
3533 my $rules = $cluster_conf->{rules
};
3534 if ($rules && scalar(@$rules)) {
3535 $raw .= "[RULES]\n\n";
3536 $raw .= &$format_rules($rules, 1);
3540 if ($cluster_conf->{groups
}) {
3541 foreach my $group (sort keys %{$cluster_conf->{groups
}}) {
3542 my $rules = $cluster_conf->{groups
}->{$group};
3543 if (my $comment = $cluster_conf->{group_comments
}->{$group}) {
3544 my $utf8comment = encode
('utf8', $comment);
3545 $raw .= "[group $group] # $utf8comment\n\n";
3547 $raw .= "[group $group]\n\n";
3550 $raw .= &$format_rules($rules, 0);
3556 mkdir $pvefw_conf_dir;
3557 PVE
::Tools
::file_set_contents
($clusterfw_conf_filename, $raw);
3559 unlink $clusterfw_conf_filename;
3563 sub lock_hostfw_conf
{
3564 my ($timeout, $code, @param) = @_;
3566 my $res = PVE
::Cluster
::cfs_lock_firewall
("host-$nodename", $timeout, $code, @param);
3572 sub load_hostfw_conf
{
3573 my ($cluster_conf, $filename) = @_;
3575 $filename = $hostfw_conf_filename if !defined($filename);
3577 my $empty_conf = { rules
=> [], options
=> {}};
3578 return generic_fw_config_parser
($filename, $cluster_conf, $empty_conf, 'host');
3581 sub save_hostfw_conf
{
3582 my ($hostfw_conf) = @_;
3586 my $options = $hostfw_conf->{options
};
3587 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3589 my $rules = $hostfw_conf->{rules
};
3590 if ($rules && scalar(@$rules)) {
3591 $raw .= "[RULES]\n\n";
3592 $raw .= &$format_rules($rules, 1);
3597 PVE
::Tools
::file_set_contents
($hostfw_conf_filename, $raw);
3599 unlink $hostfw_conf_filename;
3604 my ($cluster_conf, $hostfw_conf, $vmdata, $corosync_conf) = @_;
3608 # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3609 $pve_std_chains = dclone
($pve_std_chains_conf);
3611 if ($vmdata) { # test mode
3612 my $testdir = $vmdata->{testdir
} || die "no test directory specified";
3613 my $filename = "$testdir/cluster.fw";
3614 $cluster_conf = load_clusterfw_conf
($filename);
3616 $filename = "$testdir/host.fw";
3617 $hostfw_conf = load_hostfw_conf
($cluster_conf, $filename);
3619 $vmfw_configs = read_vm_firewall_configs
($cluster_conf, $vmdata, $testdir);
3620 } else { # normal operation
3621 $cluster_conf = load_clusterfw_conf
(undef) if !$cluster_conf;
3623 $hostfw_conf = load_hostfw_conf
($cluster_conf, undef) if !$hostfw_conf;
3625 # cfs_update is handled by daemon or API
3626 $corosync_conf = PVE
::Cluster
::cfs_read_file
("corosync.conf")
3627 if !defined($corosync_conf) && PVE
::Corosync
::check_conf_exists
(1);
3629 $vmdata = read_local_vm_config
();
3630 $vmfw_configs = read_vm_firewall_configs
($cluster_conf, $vmdata, undef);
3633 return ({},{},{},{}) if !$cluster_conf->{options
}->{enable
};
3636 if ($cluster_conf->{aliases
}->{local_network
}) {
3637 $localnet = $cluster_conf->{aliases
}->{local_network
}->{cidr
};
3640 ($localnet, $localnet_ver) = parse_ip_or_cidr
(local_network
() || '127.0.0.0/8');
3642 $cluster_conf->{aliases
}->{local_network
} = {
3643 name
=> 'local_network', cidr
=> $localnet, ipversion
=> $localnet_ver };
3646 push @{$cluster_conf->{ipset
}->{management
}}, { cidr
=> $localnet };
3650 $ruleset->{filter
} = compile_iptables_filter
($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3651 $ruleset->{raw
} = compile_iptables_raw
($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3652 $rulesetv6->{filter
} = compile_iptables_filter
($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
3653 $rulesetv6->{raw
} = compile_iptables_raw
($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
3654 my $ebtables_ruleset = compile_ebtables_filter
($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata);
3655 my $ipset_ruleset = compile_ipsets
($cluster_conf, $vmfw_configs, $vmdata);
3657 return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
3660 sub compile_iptables_raw
{
3661 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
3665 my $hostfw_options = $hostfw_conf->{options
} || {};
3666 my $protection_synflood = $hostfw_options->{protection_synflood
} || 0;
3668 if($protection_synflood) {
3670 my $protection_synflood_rate = $hostfw_options->{protection_synflood_rate
} ?
$hostfw_options->{protection_synflood_rate
} : 200;
3671 my $protection_synflood_burst = $hostfw_options->{protection_synflood_burst
} ?
$hostfw_options->{protection_synflood_burst
} : 1000;
3672 my $protection_synflood_limit = $hostfw_options->{protection_synflood_limit
} ?
$hostfw_options->{protection_synflood_limit
} : 3000;
3673 my $protection_synflood_expire = $hostfw_options->{nf_conntrack_tcp_timeout_syn_recv
} ?
$hostfw_options->{nf_conntrack_tcp_timeout_syn_recv
} : 60;
3674 $protection_synflood_expire = $protection_synflood_expire * 1000;
3675 my $protection_synflood_mask = $ipversion == 4 ?
32 : 64;
3677 ruleset_create_chain
($ruleset, "PVEFW-PREROUTING");
3678 ruleset_addrule
($ruleset, "PVEFW-PREROUTING", "-p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -m hashlimit --hashlimit-above $protection_synflood_rate/sec --hashlimit-burst $protection_synflood_burst --hashlimit-mode srcip --hashlimit-name syn --hashlimit-htable-size 2097152 --hashlimit-srcmask $protection_synflood_mask --hashlimit-htable-expire $protection_synflood_expire", "-j DROP");
3684 sub compile_iptables_filter
{
3685 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
3689 ruleset_create_chain
($ruleset, "PVEFW-INPUT");
3690 ruleset_create_chain
($ruleset, "PVEFW-OUTPUT");
3692 ruleset_create_chain
($ruleset, "PVEFW-FORWARD");
3694 my $hostfw_options = $hostfw_conf->{options
} || {};
3696 # fixme: what log level should we use here?
3697 my $loglevel = get_option_log_level
($hostfw_options, "log_level_out");
3699 my $conn_allow_invalid = $hostfw_options->{nf_conntrack_allow_invalid
} // 0;
3700 ruleset_chain_add_conn_filters
($ruleset, "PVEFW-FORWARD", $conn_allow_invalid, "ACCEPT");
3702 ruleset_create_chain
($ruleset, "PVEFW-FWBR-IN");
3703 ruleset_chain_add_input_filters
($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3705 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3707 ruleset_create_chain
($ruleset, "PVEFW-FWBR-OUT");
3708 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3710 generate_std_chains
($ruleset, $hostfw_options, $ipversion);
3712 my $hostfw_enable = !(defined($hostfw_options->{enable
}) && ($hostfw_options->{enable
} == 0));
3714 if ($hostfw_enable) {
3715 eval { enable_host_firewall
($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf); };
3716 warn $@ if $@; # just to be sure - should not happen
3719 # generate firewall rules for QEMU VMs
3720 foreach my $vmid (sort keys %{$vmdata->{qemu
}}) {
3722 my $conf = $vmdata->{qemu
}->{$vmid};
3723 my $vmfw_conf = $vmfw_configs->{$vmid};
3724 return if !$vmfw_conf || !$vmfw_conf->{options
}->{enable
};
3726 foreach my $netid (sort keys %$conf) {
3727 next if $netid !~ m/^net(\d+)$/;
3728 my $net = PVE
::QemuServer
::parse_net
($conf->{$netid});
3729 next if !$net->{firewall
};
3731 my $iface = "tap${vmid}i$1";
3732 my $macaddr = $net->{macaddr
};
3733 generate_tap_rules_direction
($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3734 $vmfw_conf, $vmid, 'IN', $ipversion);
3735 generate_tap_rules_direction
($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3736 $vmfw_conf, $vmid, 'OUT', $ipversion);
3739 warn $@ if $@; # just to be sure - should not happen
3742 # generate firewall rules for LXC containers
3743 foreach my $vmid (sort keys %{$vmdata->{lxc
}}) {
3745 my $conf = $vmdata->{lxc
}->{$vmid};
3746 my $vmfw_conf = $vmfw_configs->{$vmid};
3747 return if !$vmfw_conf || !$vmfw_conf->{options
}->{enable
};
3749 foreach my $netid (sort keys %$conf) {
3750 next if $netid !~ m/^net(\d+)$/;
3751 my $net = PVE
::LXC
::Config-
>parse_lxc_network($conf->{$netid});
3752 next if !$net->{firewall
};
3754 my $iface = "veth${vmid}i$1";
3755 my $macaddr = $net->{hwaddr
};
3756 generate_tap_rules_direction
($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3757 $vmfw_conf, $vmid, 'IN', $ipversion);
3758 generate_tap_rules_direction
($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3759 $vmfw_conf, $vmid, 'OUT', $ipversion);
3762 warn $@ if $@; # just to be sure - should not happen
3765 if (ruleset_chain_exist
($ruleset, "PVEFW-IPS")){
3766 ruleset_insertrule
($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3772 sub mac_to_linklocal
{
3774 my @parts = split(/:/, $macaddr);
3775 # The standard link local address uses the fe80::/64 prefix with the
3776 # modified EUI-64 identifier derived from the MAC address by flipping the
3777 # universal/local bit and inserting FF:FE in the middle.
3779 $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3780 my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3781 return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3784 sub compile_ipsets
{
3785 my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3788 if ($cluster_conf->{aliases
}->{local_network
}) {
3789 $localnet = $cluster_conf->{aliases
}->{local_network
}->{cidr
};
3792 ($localnet, $localnet_ver) = parse_ip_or_cidr
(local_network
() || '127.0.0.0/8');
3794 $cluster_conf->{aliases
}->{local_network
} = {
3795 name
=> 'local_network', cidr
=> $localnet, ipversion
=> $localnet_ver };
3798 push @{$cluster_conf->{ipset
}->{management
}}, { cidr
=> $localnet };
3801 my $ipset_ruleset = {};
3803 # generate ipsets for QEMU VMs
3804 foreach my $vmid (keys %{$vmdata->{qemu
}}) {
3806 my $conf = $vmdata->{qemu
}->{$vmid};
3807 my $vmfw_conf = $vmfw_configs->{$vmid};
3808 return if !$vmfw_conf;
3810 # When the 'ipfilter' option is enabled every device for which there
3811 # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3813 # The reason is that ipfilter ipsets are always filled with standard
3814 # IPv6 link-local filters.
3815 my $ipsets = $vmfw_conf->{ipset
};
3816 my $implicit_sets = {};
3818 my $device_ips = {};
3819 foreach my $netid (keys %$conf) {
3820 next if $netid !~ m/^net(\d+)$/;
3821 my $net = PVE
::QemuServer
::parse_net
($conf->{$netid});
3822 next if !$net->{firewall
};
3824 if ($vmfw_conf->{options
}->{ipfilter
} && !$ipsets->{"ipfilter-$netid"}) {
3825 $implicit_sets->{"ipfilter-$netid"} = [];
3828 my $macaddr = $net->{macaddr
};
3829 my $linklocal = mac_to_linklocal
($macaddr);
3830 $device_ips->{$netid} = [
3831 { cidr
=> $linklocal },
3832 { cidr
=> 'fe80::/10', nomatch
=> 1 }
3836 generate_ipset_chains
($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3837 generate_ipset_chains
($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3839 warn $@ if $@; # just to be sure - should not happen
3842 # generate firewall rules for LXC containers
3843 foreach my $vmid (keys %{$vmdata->{lxc
}}) {
3845 my $conf = $vmdata->{lxc
}->{$vmid};
3846 my $vmfw_conf = $vmfw_configs->{$vmid};
3847 return if !$vmfw_conf;
3849 # When the 'ipfilter' option is enabled every device for which there
3850 # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3852 # The reason is that ipfilter ipsets are always filled with standard
3853 # IPv6 link-local filters, as well as the IP addresses configured
3854 # for the container.
3855 my $ipsets = $vmfw_conf->{ipset
};
3856 my $implicit_sets = {};
3858 my $device_ips = {};
3859 foreach my $netid (keys %$conf) {
3860 next if $netid !~ m/^net(\d+)$/;
3861 my $net = PVE
::LXC
::Config-
>parse_lxc_network($conf->{$netid});
3862 next if !$net->{firewall
};
3864 if ($vmfw_conf->{options
}->{ipfilter
} && !$ipsets->{"ipfilter-$netid"}) {
3865 $implicit_sets->{"ipfilter-$netid"} = [];
3868 my $macaddr = $net->{hwaddr
};
3869 my $linklocal = mac_to_linklocal
($macaddr);
3870 my $set = $device_ips->{$netid} = [
3871 { cidr
=> $linklocal },
3872 { cidr
=> 'fe80::/10', nomatch
=> 1 }
3874 if (defined($net->{ip
}) && $net->{ip
} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3875 push @$set, { cidr
=> $1 };
3877 if (defined($net->{ip6
}) && $net->{ip6
} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3878 push @$set, { cidr
=> $1 };
3882 generate_ipset_chains
($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3883 generate_ipset_chains
($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3885 warn $@ if $@; # just to be sure - should not happen
3888 generate_ipset_chains
($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset
});
3890 return $ipset_ruleset;
3893 sub compile_ebtables_filter
{
3894 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata) = @_;
3896 if (!($cluster_conf->{options
}->{ebtables
} // 1)) {
3902 ruleset_create_chain
($ruleset, "PVEFW-FORWARD");
3904 ruleset_create_chain
($ruleset, "PVEFW-FWBR-OUT");
3905 #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED', to speedup rules
3906 ruleset_addrule
($ruleset, 'PVEFW-FORWARD', '-p IPv4', '-j ACCEPT');
3907 ruleset_addrule
($ruleset, 'PVEFW-FORWARD', '-p IPv6', '-j ACCEPT');
3908 ruleset_addrule
($ruleset, 'PVEFW-FORWARD', '-o fwln+', '-j PVEFW-FWBR-OUT');
3910 # generate firewall rules for QEMU VMs
3911 foreach my $vmid (sort keys %{$vmdata->{qemu
}}) {
3913 my $conf = $vmdata->{qemu
}->{$vmid};
3914 my $vmfw_conf = $vmfw_configs->{$vmid};
3915 return if !$vmfw_conf;
3916 my $ipsets = $vmfw_conf->{ipset
};
3918 foreach my $netid (sort keys %$conf) {
3919 next if $netid !~ m/^net(\d+)$/;
3920 my $net = PVE
::QemuServer
::parse_net
($conf->{$netid});
3921 next if !$net->{firewall
};
3922 my $iface = "tap${vmid}i$1";
3923 my $macaddr = $net->{macaddr
};
3925 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3926 foreach my $ipaddr (@$ipset) {
3927 my($ip, $version) = parse_ip_or_cidr
($ipaddr->{cidr
});
3928 next if !$ip || ($version && $version != 4);
3929 push(@$arpfilter, $ip);
3932 generate_tap_layer2filter
($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3935 warn $@ if $@; # just to be sure - should not happen
3938 # generate firewall rules for LXC containers
3939 foreach my $vmid (sort keys %{$vmdata->{lxc
}}) {
3941 my $conf = $vmdata->{lxc
}->{$vmid};
3943 my $vmfw_conf = $vmfw_configs->{$vmid};
3944 return if !$vmfw_conf || !$vmfw_conf->{options
}->{enable
};
3945 my $ipsets = $vmfw_conf->{ipset
};
3947 foreach my $netid (sort keys %$conf) {
3948 next if $netid !~ m/^net(\d+)$/;
3949 my $net = PVE
::LXC
::Config-
>parse_lxc_network($conf->{$netid});
3950 next if !$net->{firewall
};
3951 my $iface = "veth${vmid}i$1";
3952 my $macaddr = $net->{hwaddr
};
3954 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3955 foreach my $ipaddr (@$ipset) {
3956 my($ip, $version) = parse_ip_or_cidr
($ipaddr->{cidr
});
3957 next if !$ip || ($version && $version != 4);
3958 push(@$arpfilter, $ip);
3961 if (defined(my $ip = $net->{ip
}) && $vmfw_conf->{options
}->{ipfilter
}) {
3962 # ebtables changes this to a .0/MASK network but we just
3963 # want the address here, no network - see #2193
3965 if ($ip ne 'dhcp') {
3966 push @$arpfilter, $ip;
3969 generate_tap_layer2filter
($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3972 warn $@ if $@; # just to be sure - should not happen
3978 sub generate_tap_layer2filter
{
3979 my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter) = @_;
3980 my $options = $vmfw_conf->{options
};
3982 my $tapchain = $iface."-OUT";
3984 # ebtables remove zeros from mac pairs
3985 $macaddr =~ s/0([0-9a-f])/$1/ig;
3986 $macaddr = lc($macaddr);
3988 ruleset_create_chain
($ruleset, $tapchain);
3990 if (defined($macaddr) && !(defined($options->{macfilter
}) && $options->{macfilter
} == 0)) {
3991 ruleset_addrule
($ruleset, $tapchain, "-s ! $macaddr", '-j DROP');
3995 my $arpchain = $tapchain."-ARP";
3996 ruleset_addrule
($ruleset, $tapchain, "-p ARP", "-j $arpchain");
3997 ruleset_create_chain
($ruleset, $arpchain);
3999 foreach my $ip (@{$arpfilter}) {
4000 ruleset_addrule
($ruleset, $arpchain, "-p ARP --arp-ip-src $ip", '-j RETURN');
4002 ruleset_addrule
($ruleset, $arpchain, '', '-j DROP');
4005 if (defined($options->{layer2_protocols
})){
4006 my $protochain = $tapchain."-PROTO";
4007 ruleset_addrule
($ruleset, $tapchain, '', "-j $protochain");
4008 ruleset_create_chain
($ruleset, $protochain);
4010 foreach my $proto (split(/,/, $options->{layer2_protocols
})) {
4011 ruleset_addrule
($ruleset, $protochain, "-p $proto", '-j RETURN');
4013 ruleset_addrule
($ruleset, $protochain, '', '-j DROP');
4016 ruleset_addrule
($ruleset, $tapchain, '', '-j ACCEPT');
4018 ruleset_addrule
($ruleset, 'PVEFW-FWBR-OUT', "-i $iface", "-j $tapchain");
4021 # the parameter $change_only_regex changes two things if defined:
4022 # * all chains not matching it will be left intact
4023 # * both the $active_chains hash and the returned status_hash have different
4024 # structure (they contain a key named 'rules').
4025 sub get_ruleset_status
{
4026 my ($ruleset, $active_chains, $digest_fn, $change_only_regex) = @_;
4028 my $statushash = {};
4030 foreach my $chain (sort keys %$ruleset) {
4031 my $rules = $ruleset->{$chain};
4032 my $sig = &$digest_fn($rules);
4035 $statushash->{$chain}->{sig
} = $sig;
4036 if (defined($change_only_regex)) {
4037 $oldsig = $active_chains->{$chain}->{sig
};
4038 $statushash->{$chain}->{rules
} = $rules;
4040 $oldsig = $active_chains->{$chain};
4042 if (!defined($oldsig)) {
4043 $statushash->{$chain}->{action
} = 'create';
4045 if ($oldsig eq $sig) {
4046 $statushash->{$chain}->{action
} = 'exists';
4048 $statushash->{$chain}->{action
} = 'update';
4052 print "$statushash->{$chain}->{action} $chain ($sig)\n";
4053 foreach my $cmd (@{$rules}) {
4059 foreach my $chain (sort keys %$active_chains) {
4060 next if defined($ruleset->{$chain});
4061 my $action = 'delete';
4062 my $sig = $active_chains->{$chain};
4063 if (defined($change_only_regex)) {
4064 $action = 'ignore' if ($chain !~ m/$change_only_regex/);
4065 $statushash->{$chain}->{rules
} = $active_chains->{$chain}->{rules
};
4068 $statushash->{$chain}->{action
} = $action;
4069 $statushash->{$chain}->{sig
} = $sig;
4070 print "$action $chain ($sig)\n" if $verbose;
4076 sub print_sig_rule
{
4077 my ($chain, $sig) = @_;
4079 # We just use this to store a SHA1 checksum used to detect changes
4080 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
4083 sub get_ruleset_cmdlist {
4084 my ($ruleset, $iptablescmd, $table) = @_;
4086 $table = 'filter' if !$table;
4088 my $cmdlist = "*$table\n"; # we pass this to iptables-restore;
4090 my ($active_chains, $hooks) = iptables_get_chains($iptablescmd, $table);
4091 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
4093 # create missing chains first
4094 foreach my $chain (sort keys %$ruleset) {
4095 my $stat = $statushash->{$chain};
4096 die "internal error
" if !$stat;
4097 next if $stat->{action} ne 'create';
4099 $cmdlist .= ":$chain - [0:0]\n";
4102 foreach my $h (qw(INPUT OUTPUT FORWARD PREROUTING)) {
4103 my $chain = "PVEFW-$h";
4104 if ($ruleset->{$chain} && !$hooks->{$h}) {
4105 $cmdlist .= "-A $h -j $chain\n";
4109 foreach my $chain (sort keys %$ruleset) {
4110 my $stat = $statushash->{$chain};
4111 die "internal error" if !$stat;
4113 if ($stat->{action
} eq 'update' || $stat->{action
} eq 'create') {
4114 $cmdlist .= "-F $chain\n";
4115 foreach my $cmd (@{$ruleset->{$chain}}) {
4116 $cmdlist .= "$cmd\n";
4118 $cmdlist .= print_sig_rule
($chain, $stat->{sig
});
4119 } elsif ($stat->{action
} eq 'delete') {
4120 die "internal error"; # this should not happen
4121 } elsif ($stat->{action
} eq 'exists') {
4124 die "internal error - unknown status '$stat->{action}'";
4128 foreach my $chain (keys %$statushash) {
4129 next if $statushash->{$chain}->{action
} ne 'delete';
4130 $cmdlist .= "-F $chain\n";
4132 foreach my $chain (keys %$statushash) {
4133 next if $statushash->{$chain}->{action
} ne 'delete';
4134 next if $chain eq 'PVEFW-INPUT';
4135 next if $chain eq 'PVEFW-OUTPUT';
4136 next if $chain eq 'PVEFW-FORWARD';
4137 next if $chain eq 'PVEFW-PREROUTING';
4138 $cmdlist .= "-X $chain\n";
4141 my $changes = $cmdlist ne "*$table\n" ?
1 : 0;
4143 $cmdlist .= "COMMIT\n";
4145 return wantarray ?
($cmdlist, $changes) : $cmdlist;
4148 my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tap|veth)\d+i\d+-(?:IN|OUT)/;
4150 sub get_ebtables_cmdlist
{
4154 my $cmdlist = "*filter\n";
4156 my $active_chains = ebtables_get_chains
();
4157 my $statushash = get_ruleset_status
($ruleset, $active_chains,
4158 \
&iptables_chain_digest
,
4159 $pve_ebtables_chainname_regex);
4161 # create chains first and make sure PVE rules are evaluated if active
4162 my $append_pve_to_forward = '-A FORWARD -j PVEFW-FORWARD';
4163 my $pve_include = 0;
4164 foreach my $chain (sort keys %$statushash) {
4165 next if ($statushash->{$chain}->{action
} eq 'delete');
4166 $cmdlist .= ":$chain ACCEPT\n";
4167 $pve_include = 1 if ($chain eq 'PVEFW-FORWARD');
4170 foreach my $chain (sort keys %$statushash) {
4171 my $stat = $statushash->{$chain};
4172 $changes = 1 if ($stat->{action
} !~ 'ignore|exists');
4173 next if ($stat->{action
} eq 'delete');
4175 foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
4176 if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
4177 next if ! $pve_include;
4180 $cmdlist .= "$cmd\n";
4183 $cmdlist .= "$append_pve_to_forward\n" if $pve_include;
4185 return wantarray ?
($cmdlist, $changes) : $cmdlist;
4188 sub get_ipset_cmdlist
{
4193 my $delete_cmdlist = "";
4195 my $active_chains = ipset_get_chains
();
4196 my $statushash = get_ruleset_status
($ruleset, $active_chains, \
&ipset_chain_digest
);
4198 # remove stale _swap chains
4199 foreach my $chain (keys %$active_chains) {
4200 if ($chain =~ m/^PVEFW-\S+_swap$/) {
4201 $cmdlist .= "destroy $chain\n";
4205 foreach my $chain (keys %$ruleset) {
4206 my $stat = $statushash->{$chain};
4207 die "internal error" if !$stat;
4209 if ($stat->{action
} eq 'create') {
4210 foreach my $cmd (@{$ruleset->{$chain}}) {
4211 $cmdlist .= "$cmd\n";
4216 foreach my $chain (keys %$ruleset) {
4217 my $stat = $statushash->{$chain};
4218 die "internal error" if !$stat;
4220 if ($stat->{action
} eq 'update') {
4221 my $chain_swap = $chain."_swap";
4223 foreach my $cmd (@{$ruleset->{$chain}}) {
4224 $cmd =~ s/$chain/$chain_swap/;
4225 $cmdlist .= "$cmd\n";
4227 $cmdlist .= "swap $chain_swap $chain\n";
4228 $cmdlist .= "flush $chain_swap\n";
4229 $cmdlist .= "destroy $chain_swap\n";
4233 # the remove unused chains
4234 foreach my $chain (keys %$statushash) {
4235 next if $statushash->{$chain}->{action
} ne 'delete';
4237 $delete_cmdlist .= "flush $chain\n";
4238 $delete_cmdlist .= "destroy $chain\n";
4241 my $changes = ($cmdlist || $delete_cmdlist) ?
1 : 0;
4243 return ($cmdlist, $delete_cmdlist, $changes);
4247 my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = @_;
4249 enable_bridge_firewall
();
4251 my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
4252 get_ipset_cmdlist
($ipset_ruleset);
4254 my ($cmdlist, $changes) = get_ruleset_cmdlist
($ruleset->{filter
});
4255 my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist
($rulesetv6->{filter
}, "ip6tables");
4256 my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist
($ebtables_ruleset);
4257 my ($cmdlist_raw, $changes_raw) = get_ruleset_cmdlist
($ruleset->{raw
}, undef, 'raw');
4258 my ($cmdlistv6_raw, $changesv6_raw) = get_ruleset_cmdlist
($rulesetv6->{raw
}, "ip6tables", 'raw');
4261 if ($ipset_changes) {
4262 print "ipset changes:\n";
4263 print $ipset_create_cmdlist if $ipset_create_cmdlist;
4264 print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
4268 print "iptables changes:\n";
4273 print "ip6tables changes:\n";
4278 print "iptables table raw changes:\n";
4282 if ($changesv6_raw) {
4283 print "ip6tables table raw changes:\n";
4284 print $cmdlistv6_raw;
4287 if ($ebtables_changes) {
4288 print "ebtables changes:\n";
4289 print $ebtables_cmdlist;
4293 my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
4294 PVE
::Tools
::file_set_contents
($tmpfile, $ipset_create_cmdlist || '');
4296 ipset_restore_cmdlist
($ipset_create_cmdlist);
4298 $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
4299 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlist || '');
4301 iptables_restore_cmdlist
($cmdlist);
4303 $tmpfile = "$pve_fw_status_dir/ip4cmdlistraw";
4304 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlist_raw || '');
4306 iptables_restore_cmdlist
($cmdlist_raw, 'raw');
4308 $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
4309 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlistv6 || '');
4311 ip6tables_restore_cmdlist
($cmdlistv6);
4313 $tmpfile = "$pve_fw_status_dir/ip6cmdlistraw";
4314 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlistv6_raw || '');
4316 ip6tables_restore_cmdlist
($cmdlistv6_raw, 'raw');
4318 $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
4319 PVE
::Tools
::file_set_contents
($tmpfile, $ipset_delete_cmdlist || '');
4321 ipset_restore_cmdlist
($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
4323 ebtables_restore_cmdlist
($ebtables_cmdlist);
4325 $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
4326 PVE
::Tools
::file_set_contents
($tmpfile, $ebtables_cmdlist || '');
4328 # test: re-read status and check if everything is up to date
4329 my $ruleset_filter = $ruleset->{filter
};
4330 my $active_chains = iptables_get_chains
();
4331 my $statushash = get_ruleset_status
($ruleset_filter, $active_chains, \
&iptables_chain_digest
);
4334 foreach my $chain (sort keys %$ruleset_filter) {
4335 my $stat = $statushash->{$chain};
4336 if ($stat->{action
} ne 'exists') {
4337 warn "unable to update chain '$chain'\n";
4342 my $rulesetv6_filter = $rulesetv6->{filter
};
4343 my $active_chainsv6 = iptables_get_chains
("ip6tables");
4344 my $statushashv6 = get_ruleset_status
($rulesetv6_filter, $active_chainsv6, \
&iptables_chain_digest
);
4346 foreach my $chain (sort keys %$rulesetv6_filter) {
4347 my $stat = $statushashv6->{$chain};
4348 if ($stat->{action
} ne 'exists') {
4349 warn "unable to update chain '$chain'\n";
4354 my $ruleset_raw = $ruleset->{raw
};
4355 my $active_chains_raw = iptables_get_chains
(undef, 'raw');
4356 my $statushash_raw = get_ruleset_status
($ruleset_raw, $active_chains_raw, \
&iptables_chain_digest
);
4358 foreach my $chain (sort keys %$ruleset_raw) {
4359 my $stat = $statushash_raw->{$chain};
4360 if ($stat->{action
} ne 'exists') {
4361 warn "unable to update chain '$chain'\n";
4366 my $rulesetv6_raw = $rulesetv6->{raw
};
4367 my $active_chainsv6_raw = iptables_get_chains
("ip6tables", 'raw');
4368 my $statushashv6_raw = get_ruleset_status
($rulesetv6_raw, $active_chainsv6_raw, \
&iptables_chain_digest
);
4370 foreach my $chain (sort keys %$rulesetv6_raw) {
4371 my $stat = $statushashv6_raw->{$chain};
4372 if ($stat->{action
} ne 'exists') {
4373 warn "unable to update chain '$chain'\n";
4378 my $active_ebtables_chains = ebtables_get_chains
();
4379 my $ebtables_statushash = get_ruleset_status
($ebtables_ruleset,
4380 $active_ebtables_chains, \
&iptables_chain_digest
,
4381 $pve_ebtables_chainname_regex);
4383 foreach my $chain (sort keys %$ebtables_ruleset) {
4384 my $stat = $ebtables_statushash->{$chain};
4385 if ($stat->{action
} ne 'exists') {
4386 warn "ebtables : unable to update chain '$chain'\n";
4391 die "unable to apply firewall changes\n" if $errors;
4393 update_nf_conntrack_max
($hostfw_conf);
4395 update_nf_conntrack_tcp_timeout_established
($hostfw_conf);
4397 update_nf_conntrack_tcp_timeout_syn_recv
($hostfw_conf);
4399 update_nf_conntrack_logging
($hostfw_conf);
4402 sub update_nf_conntrack_max
{
4403 my ($hostfw_conf) = @_;
4405 my $max = 262144; # reasonable default (2^16 * 4), see nf_conntrack-sysctl docs
4407 my $options = $hostfw_conf->{options
} || {};
4409 if (defined($options->{nf_conntrack_max
}) && ($options->{nf_conntrack_max
} > $max)) {
4410 $max = $options->{nf_conntrack_max
};
4411 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
4414 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
4415 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
4417 my $current = int(PVE
::Tools
::file_read_firstline
($filename_nf_conntrack_max) || $max);
4419 if ($current != $max) {
4420 my $hashsize = int($max/4);
4421 PVE
::ProcFSTools
::write_proc_entry
($filename_hashsize, $hashsize);
4422 PVE
::ProcFSTools
::write_proc_entry
($filename_nf_conntrack_max, $max);
4426 sub update_nf_conntrack_tcp_timeout_established
{
4427 my ($hostfw_conf) = @_;
4429 my $options = $hostfw_conf->{options
} || {};
4431 my $value = defined($options->{nf_conntrack_tcp_timeout_established
}) ?
$options->{nf_conntrack_tcp_timeout_established
} : 432000;
4433 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
4436 sub update_nf_conntrack_tcp_timeout_syn_recv
{
4437 my ($hostfw_conf) = @_;
4439 my $options = $hostfw_conf->{options
} || {};
4441 my $value = defined($options->{nf_conntrack_tcp_timeout_syn_recv
}) ?
$options->{nf_conntrack_tcp_timeout_syn_recev
} : 60;
4443 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_syn_recv", $value);
4446 my $log_nf_conntrack_enabled = undef;
4447 sub update_nf_conntrack_logging
{
4448 my ($hostfw_conf) = @_;
4450 my $options = $hostfw_conf->{options
} || {};
4451 my $value = $options->{log_nf_conntrack
} || 0;
4452 if (!defined($log_nf_conntrack_enabled)
4453 || $value != $log_nf_conntrack_enabled)
4455 my $tmpfile = "$pve_fw_status_dir/log_nf_conntrack";
4456 PVE
::Tools
::file_set_contents
($tmpfile, $value);
4458 run_command
([qw(systemctl try-reload-or-restart pvefw-logger.service)]);
4459 $log_nf_conntrack_enabled = $value;
4463 sub remove_pvefw_chains
{
4465 PVE
::Firewall
::remove_pvefw_chains_iptables
("iptables");
4466 PVE
::Firewall
::remove_pvefw_chains_iptables
("ip6tables");
4467 PVE
::Firewall
::remove_pvefw_chains_iptables
("iptables", "raw");
4468 PVE
::Firewall
::remove_pvefw_chains_iptables
("ip6tables", "raw");
4469 PVE
::Firewall
::remove_pvefw_chains_ipset
();
4470 PVE
::Firewall
::remove_pvefw_chains_ebtables
();
4474 sub remove_pvefw_chains_iptables
{
4475 my ($iptablescmd, $table) = @_;
4477 $table = 'filter' if !$table;
4479 my ($chash, $hooks) = iptables_get_chains
($iptablescmd, $table);
4480 my $cmdlist = "*$table\n";
4482 foreach my $h (qw(INPUT OUTPUT FORWARD PREROUTING)) {
4484 $cmdlist .= "-D $h -j PVEFW-$h\n";
4488 foreach my $chain (keys %$chash) {
4489 $cmdlist .= "-F $chain\n";
4492 foreach my $chain (keys %$chash) {
4493 $cmdlist .= "-X $chain\n";
4495 $cmdlist .= "COMMIT\n";
4497 if($iptablescmd eq "ip6tables") {
4498 ip6tables_restore_cmdlist
($cmdlist, $table);
4500 iptables_restore_cmdlist
($cmdlist, $table);
4504 sub remove_pvefw_chains_ipset
{
4506 my $ipset_chains = ipset_get_chains
();
4510 foreach my $chain (keys %$ipset_chains) {
4511 $cmdlist .= "flush $chain\n";
4512 $cmdlist .= "destroy $chain\n";
4515 ipset_restore_cmdlist
($cmdlist) if $cmdlist;
4518 sub remove_pvefw_chains_ebtables
{
4519 # apply empty ruleset = remove all our chains
4520 ebtables_restore_cmdlist
(get_ebtables_cmdlist
({}));
4524 my $cluster_conf = load_clusterfw_conf
();
4525 my $cluster_options = $cluster_conf->{options
};
4526 my $enable = $cluster_options->{enable
};
4530 # load required modules here
4536 my $cluster_conf = load_clusterfw_conf
();
4537 my $cluster_options = $cluster_conf->{options
};
4539 if (!$cluster_options->{enable
}) {
4540 PVE
::Firewall
::remove_pvefw_chains
();
4544 my $hostfw_conf = load_hostfw_conf
($cluster_conf);
4546 my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile
($cluster_conf, $hostfw_conf);
4548 apply_ruleset
($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);