13 use Socket
qw(AF_INET AF_INET6 inet_ntop inet_pton);
14 use Storable
qw(dclone);
18 use PVE
::Exception
qw(raise raise_param_exc);
20 use PVE
::JSONSchema
qw(register_standard_option get_standard_option);
24 use PVE
::Tools
qw($IPV4RE $IPV6RE);
25 use PVE
::Tools
qw(run_command lock_file dir_glob_foreach);
27 my $pvefw_conf_dir = "/etc/pve/firewall";
28 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
30 # dynamically include PVE::QemuServer and PVE::LXC
31 # to avoid dependency problems
34 require PVE
::QemuServer
;
35 require PVE
::QemuConfig
;
36 $have_qemu_server = 1;
45 my $pve_fw_status_dir = "/var/lib/pve-firewall";
47 mkdir $pve_fw_status_dir; # make sure this exists
49 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
50 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
51 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
53 my $max_alias_name_length = 64;
54 my $max_ipset_name_length = 64;
55 my $max_group_name_length = 18;
57 my $PROTOCOLS_WITH_PORTS = {
59 udplite
=> 1, 136 => 1,
65 PVE
::JSONSchema
::register_format
('IPorCIDR', \
&pve_verify_ip_or_cidr
);
66 sub pve_verify_ip_or_cidr
{
67 my ($cidr, $noerr) = @_;
69 if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
70 return $cidr if Net
::IP-
>new($cidr);
71 return undef if $noerr;
72 die Net
::IP
::Error
() . "\n";
74 return undef if $noerr;
75 die "value does not look like a valid IP address or CIDR network\n";
78 PVE
::JSONSchema
::register_format
('IPorCIDRorAlias', \
&pve_verify_ip_or_cidr_or_alias
);
79 sub pve_verify_ip_or_cidr_or_alias
{
80 my ($cidr, $noerr) = @_;
82 return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
84 return pve_verify_ip_or_cidr
($cidr, $noerr);
87 PVE
::JSONSchema
::register_standard_option
('ipset-name', {
88 description
=> "IP set name.",
90 pattern
=> $ipset_name_pattern,
92 maxLength
=> $max_ipset_name_length,
95 PVE
::JSONSchema
::register_standard_option
('pve-fw-alias', {
96 description
=> "Alias name.",
98 pattern
=> $ip_alias_pattern,
100 maxLength
=> $max_alias_name_length,
103 PVE
::JSONSchema
::register_standard_option
('pve-fw-loglevel' => {
104 description
=> "Log level.",
106 enum
=> ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
110 PVE
::JSONSchema
::register_standard_option
('pve-security-group-name', {
111 description
=> "Security Group name.",
113 pattern
=> $security_group_name_pattern,
115 maxLength
=> $max_group_name_length,
118 my $feature_ipset_nomatch = 0;
120 my (undef, undef, $release) = POSIX
::uname
();
121 if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
122 my ($major, $minor) = ($1, $2);
123 $feature_ipset_nomatch = 1 if ($major > 3) ||
124 ($major == 3 && $minor >= 7);
129 my $nodename = PVE
::INotify
::nodename
();
130 my $hostfw_conf_filename = "/etc/pve/nodes/$nodename/host.fw";
132 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
134 my $default_log_level = 'nolog'; # avoid logs by default
135 my $global_log_ratelimit = '--limit 1/sec';
137 my $log_level_hash = {
159 # sport => port[,port[,port]].. or port:port
160 # dport => port[,port[,port]].. or port:port
161 # log => optional, loglevel
162 # logmsg => optional, logmsg - overwrites default
163 # iface_in => incomin interface
164 # iface_out => outgoing interface
165 # match => optional, overwrites generation of match
166 # target => optional, overwrites action
168 # we need to overwrite some macros for ipv6
169 my $pve_ipv6fw_macros = {
171 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'echo-request' },
173 'NeighborDiscovery' => [
174 "IPv6 neighbor solicitation, neighbor and router advertisement",
175 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'router-solicitation' },
176 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'router-advertisement' },
177 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'neighbor-solicitation' },
178 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'neighbor-advertisement' },
182 { action
=> 'PARAM', proto
=> 'udp', dport
=> '546:547', sport
=> '546:547' },
185 { action
=> 'PARAM', proto
=> 'udp', dport
=> '33434:33524' },
186 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'echo-request' },
190 # imported/converted from: /usr/share/shorewall/macro.*
191 my $pve_fw_macros = {
194 { action
=> 'PARAM', proto
=> 'udp', dport
=> '10080' },
195 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10080' },
198 "Auth (identd) traffic",
199 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '113' },
202 "Border Gateway Protocol traffic",
203 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '179' },
206 "BitTorrent traffic for BitTorrent 3.1 and earlier",
207 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6889' },
208 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
211 "BitTorrent traffic for BitTorrent 3.2 and later",
212 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6999' },
213 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
216 "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Daemons)",
217 # Legacy port for protocol v1
218 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6789' },
219 # New port for protocol v2
220 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3300' },
221 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6800:7300' },
224 "Concurrent Versions System pserver traffic",
225 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2401' },
228 "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
229 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1494' },
230 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1604' },
231 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2598' },
234 "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
235 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3689' },
236 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3689' },
239 "Distributed Checksum Clearinghouse spam filtering mechanism",
240 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6277' },
243 "Forwarded DHCP traffic",
244 { action
=> 'PARAM', proto
=> 'udp', dport
=> '67:68', sport
=> '67:68' },
247 "Domain Name System traffic (upd and tcp)",
248 { action
=> 'PARAM', proto
=> 'udp', dport
=> '53' },
249 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '53' },
252 "Distributed Compiler service",
253 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3632' },
256 "File Transfer Protocol",
257 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '21' },
260 "Finger protocol (RFC 742)",
261 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '79' },
264 "GNUnet secure peer-to-peer networking traffic",
265 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2086' },
266 { action
=> 'PARAM', proto
=> 'udp', dport
=> '2086' },
267 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1080' },
268 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1080' },
271 "Generic Routing Encapsulation tunneling protocol",
272 { action
=> 'PARAM', proto
=> '47' },
275 "Git distributed revision control traffic",
276 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9418' },
279 "OpenPGP HTTP key server protocol traffic",
280 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '11371' },
283 "Hypertext Transfer Protocol (WWW)",
284 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
287 "Hypertext Transfer Protocol (WWW) over SSL",
288 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
291 "Internet Cache Protocol V2 (Squid) traffic",
292 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3130' },
295 "AOL Instant Messenger traffic",
296 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5190' },
299 "Internet Message Access Protocol",
300 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '143' },
303 "Internet Message Access Protocol over SSL",
304 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '993' },
307 "IPIP capsulation traffic",
308 { action
=> 'PARAM', proto
=> '94' },
312 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
313 { action
=> 'PARAM', proto
=> '50' },
316 "IPsec authentication (AH) traffic",
317 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
318 { action
=> 'PARAM', proto
=> '51' },
321 "IPsec traffic and Nat-Traversal",
322 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500' },
323 { action
=> 'PARAM', proto
=> 'udp', dport
=> '4500' },
324 { action
=> 'PARAM', proto
=> '50' },
327 "Internet Relay Chat traffic",
328 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6667' },
331 "HP Jetdirect printing",
332 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9100' },
335 "Layer 2 Tunneling Protocol traffic",
336 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1701' },
339 "Lightweight Directory Access Protocol traffic",
340 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '389' },
343 "Secure Lightweight Directory Access Protocol traffic",
344 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '636' },
347 "Microsoft Notification Protocol",
348 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1863' },
351 "Microsoft SQL Server",
352 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1433' },
355 "Mail traffic (SMTP, SMTPS, Submission)",
356 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
357 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
358 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
362 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5353' },
365 "Munin networked resource monitoring traffic",
366 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '4949' },
370 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3306' },
373 "NNTP traffic (Usenet).",
374 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '119' },
377 "Encrypted NNTP traffic (Usenet)",
378 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '563' },
381 "Network Time Protocol (ntpd)",
382 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
385 "OSPF multicast traffic",
386 { action
=> 'PARAM', proto
=> '89' },
390 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1194' },
393 "Symantec PCAnywere (tm)",
394 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5632' },
395 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5631' },
398 "Proxmox Mail Gateway web interface",
399 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '8006' },
403 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '110' },
406 "Encrypted POP3 traffic",
407 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '995' },
410 "Point-to-Point Tunneling Protocol",
411 { action
=> 'PARAM', proto
=> '47' },
412 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1723' },
416 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
420 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5432' },
423 "Line Printer protocol printing",
424 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '515' },
427 "Microsoft Remote Desktop Protocol traffic",
428 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3389' },
431 "Routing Information Protocol (bidirectional)",
432 { action
=> 'PARAM', proto
=> 'udp', dport
=> '520' },
435 "BIND remote management protocol",
436 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '953' },
439 "Razor Antispam System",
440 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2703' },
443 "Remote time retrieval (rdate)",
444 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
448 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '873' },
451 "SANE network scanning",
452 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6566' },
455 "Microsoft SMB traffic",
456 { action
=> 'PARAM', proto
=> 'udp', dport
=> '135,445' },
457 { action
=> 'PARAM', proto
=> 'udp', dport
=> '137:139' },
458 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
459 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '135,139,445' },
462 "Samba Web Administration Tool",
463 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '901' },
466 "Simple Mail Transfer Protocol",
467 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
470 "Encrypted Simple Mail Transfer Protocol",
471 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
474 "Simple Network Management Protocol",
475 { action
=> 'PARAM', proto
=> 'udp', dport
=> '161:162' },
476 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '161' },
479 "Spam Assassin SPAMD traffic",
480 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '783' },
483 "Secure shell traffic",
484 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '22' },
487 "Subversion server (svnserve)",
488 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3690' },
491 "SixXS IPv6 Deployment and Tunnel Broker",
492 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3874' },
493 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3740' },
494 { action
=> 'PARAM', proto
=> '41' },
495 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5072,8374' },
498 "Proxmox VE SPICE display proxy traffic",
499 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3128' },
502 "Squid web proxy traffic",
503 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3128' },
506 "Mail message submission traffic",
507 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
510 "Syslog protocol (RFC 5424) traffic",
511 { action
=> 'PARAM', proto
=> 'udp', dport
=> '514' },
512 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '514' },
515 "Trivial File Transfer Protocol traffic",
516 { action
=> 'PARAM', proto
=> 'udp', dport
=> '69' },
520 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '23' },
524 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '992' },
527 "RFC 868 Time protocol",
528 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
531 "Traceroute (for up to 30 hops) traffic",
532 { action
=> 'PARAM', proto
=> 'udp', dport
=> '33434:33524' },
533 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
536 "VNC traffic for VNC display's 0 - 99",
537 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5900:5999' },
540 "VNC traffic from Vncservers to Vncviewers in listen mode",
541 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5500' },
544 "WWW traffic (HTTP and HTTPS)",
545 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
546 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
549 "Web Cache/Proxy traffic (port 8080)",
550 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '8080' },
554 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10000' },
557 "Whois (nicname, RFC 3912) traffic",
558 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '43' },
562 my $pve_fw_parsed_macros;
563 my $pve_fw_macro_descr;
564 my $pve_fw_macro_ipversion = {};
565 my $pve_fw_preferred_macro_names = {};
567 my $FWACCEPTMARK_ON = "0x80000000/0x80000000";
568 my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
570 my $pve_std_chains = {};
571 my $pve_std_chains_conf = {};
572 $pve_std_chains_conf->{4} = {
573 'PVEFW-SET-ACCEPT-MARK' => [
574 { target
=> "-j MARK --set-mark $FWACCEPTMARK_ON" },
576 'PVEFW-DropBroadcast' => [
577 # same as shorewall 'Broadcast'
578 # simply DROP BROADCAST/MULTICAST/ANYCAST
579 # we can use this to reduce logging
580 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
581 { action
=> 'DROP', dsttype
=> 'MULTICAST' },
582 { action
=> 'DROP', dsttype
=> 'ANYCAST' },
583 { action
=> 'DROP', dest
=> '224.0.0.0/4' },
586 # same as shorewall 'reject'
587 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
588 { action
=> 'DROP', source
=> '224.0.0.0/4' },
589 { action
=> 'DROP', proto
=> 'icmp' },
590 { match
=> '-p tcp', target
=> '-j REJECT --reject-with tcp-reset' },
591 { match
=> '-p udp', target
=> '-j REJECT --reject-with icmp-port-unreachable' },
592 { match
=> '-p icmp', target
=> '-j REJECT --reject-with icmp-host-unreachable' },
593 { target
=> '-j REJECT --reject-with icmp-host-prohibited' },
596 # same as shorewall 'Drop', which is equal to DROP,
597 # but REJECT/DROP some packages to reduce logging,
598 # and ACCEPT critical ICMP types
599 # we are not interested in BROADCAST/MULTICAST/ANYCAST
600 { action
=> 'PVEFW-DropBroadcast' },
601 # ACCEPT critical ICMP types
602 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
603 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
604 # Drop packets with INVALID state
605 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
606 # Drop Microsoft SMB noise
607 { action
=> 'DROP', proto
=> 'udp', dport
=> '135,445' },
608 { action
=> 'DROP', proto
=> 'udp', dport
=> '137:139' },
609 { action
=> 'DROP', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
610 { action
=> 'DROP', proto
=> 'tcp', dport
=> '135,139,445' },
611 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
612 # Drop new/NotSyn traffic so that it doesn't get logged
613 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
615 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
618 # same as shorewall 'Reject', which is equal to Reject,
619 # but REJECT/DROP some packages to reduce logging,
620 # and ACCEPT critical ICMP types
621 # we are not interested in BROADCAST/MULTICAST/ANYCAST
622 { action
=> 'PVEFW-DropBroadcast' },
623 # ACCEPT critical ICMP types
624 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
625 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
626 # Drop packets with INVALID state
627 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
628 # Drop Microsoft SMB noise
629 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '135,445' },
630 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '137:139'},
631 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
632 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '135,139,445' },
633 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
634 # Drop new/NotSyn traffic so that it doesn't get logged
635 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
637 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
639 'PVEFW-tcpflags' => [
640 # same as shorewall tcpflags action.
641 # Packets arriving on this interface are checked for some illegal combinations of TCP flags
642 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target
=> '-g PVEFW-logflags' },
643 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target
=> '-g PVEFW-logflags' },
644 { match
=> '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target
=> '-g PVEFW-logflags' },
645 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target
=> '-g PVEFW-logflags' },
646 { match
=> '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target
=> '-g PVEFW-logflags' },
649 # same as shorewall smurfs action
650 # Filter packets for smurfs (packets with a broadcast address as the source).
651 { match
=> '-s 0.0.0.0/32', target
=> '-j RETURN' }, # allow DHCP
652 { match
=> '-m addrtype --src-type BROADCAST', target
=> '-g PVEFW-smurflog' },
653 { match
=> '-s 224.0.0.0/4', target
=> '-g PVEFW-smurflog' },
655 'PVEFW-smurflog' => [
656 { action
=> 'DROP', logmsg
=> 'DROP: ' },
658 'PVEFW-logflags' => [
659 { action
=> 'DROP', logmsg
=> 'DROP: ' },
663 $pve_std_chains_conf->{6} = {
664 'PVEFW-SET-ACCEPT-MARK' => [
665 { target
=> "-j MARK --set-mark $FWACCEPTMARK_ON" },
667 'PVEFW-DropBroadcast' => [
668 # same as shorewall 'Broadcast'
669 # simply DROP BROADCAST/MULTICAST/ANYCAST
670 # we can use this to reduce logging
671 #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
672 # ipv6 addrtype does not work with kernel 2.6.32
673 #{ action => 'DROP', dsttype => 'MULTICAST' },
674 #{ action => 'DROP', dsttype => 'ANYCAST' },
675 { action
=> 'DROP', dest
=> 'ff00::/8' },
676 #{ action => 'DROP', dest => '224.0.0.0/4' },
679 { action
=> 'DROP', proto
=> 'icmpv6' },
680 { match
=> '-p tcp', target
=> '-j REJECT --reject-with tcp-reset' },
681 { match
=> '-p udp', target
=> '-j REJECT --reject-with icmp6-port-unreachable' },
682 { target
=> '-j REJECT --reject-with icmp6-adm-prohibited' },
685 # same as shorewall 'Drop', which is equal to DROP,
686 # but REJECT/DROP some packages to reduce logging,
687 # and ACCEPT critical ICMP types
688 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
689 # we are not interested in BROADCAST/MULTICAST/ANYCAST
690 { action
=> 'PVEFW-DropBroadcast' },
691 # ACCEPT critical ICMP types
692 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'destination-unreachable' },
693 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'time-exceeded' },
694 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'packet-too-big' },
695 # Drop packets with INVALID state
696 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
697 # Drop Microsoft SMB noise
698 { action
=> 'DROP', proto
=> 'udp', dport
=> '135,445' },
699 { action
=> 'DROP', proto
=> 'udp', dport
=> '137:139'},
700 { action
=> 'DROP', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
701 { action
=> 'DROP', proto
=> 'tcp', dport
=> '135,139,445' },
702 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
703 # Drop new/NotSyn traffic so that it doesn't get logged
704 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
706 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
709 # same as shorewall 'Reject', which is equal to Reject,
710 # but REJECT/DROP some packages to reduce logging,
711 # and ACCEPT critical ICMP types
712 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
713 # we are not interested in BROADCAST/MULTICAST/ANYCAST
714 { action
=> 'PVEFW-DropBroadcast' },
715 # ACCEPT critical ICMP types
716 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'destination-unreachable' },
717 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'time-exceeded' },
718 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'packet-too-big' },
719 # Drop packets with INVALID state
720 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
721 # Drop Microsoft SMB noise
722 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '135,445' },
723 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '137:139' },
724 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
725 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '135,139,445' },
726 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
727 # Drop new/NotSyn traffic so that it doesn't get logged
728 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
730 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
732 'PVEFW-tcpflags' => [
733 # same as shorewall tcpflags action.
734 # Packets arriving on this interface are checked for some illegal combinations of TCP flags
735 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target
=> '-g PVEFW-logflags' },
736 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target
=> '-g PVEFW-logflags' },
737 { match
=> '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target
=> '-g PVEFW-logflags' },
738 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target
=> '-g PVEFW-logflags' },
739 { match
=> '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target
=> '-g PVEFW-logflags' },
741 'PVEFW-logflags' => [
742 { action
=> 'DROP', logmsg
=> 'DROP: ' },
746 # iptables -p icmp -h
747 my $icmp_type_names = {
750 'destination-unreachable' => 1,
751 'network-unreachable' => 1,
752 'host-unreachable' => 1,
753 'protocol-unreachable' => 1,
754 'port-unreachable' => 1,
755 'fragmentation-needed' => 1,
756 'source-route-failed' => 1,
757 'network-unknown' => 1,
759 'network-prohibited' => 1,
760 'host-prohibited' => 1,
761 'TOS-network-unreachable' => 1,
762 'TOS-host-unreachable' => 1,
763 'communication-prohibited' => 1,
764 'host-precedence-violation' => 1,
765 'precedence-cutoff' => 1,
766 'source-quench' => 1,
768 'network-redirect' => 1,
769 'host-redirect' => 1,
770 'TOS-network-redirect' => 1,
771 'TOS-host-redirect' => 1,
773 'router-advertisement' => 1,
774 'router-solicitation' => 1,
775 'time-exceeded' => 1,
776 'ttl-zero-during-transit' => 1,
777 'ttl-zero-during-reassembly' => 1,
778 'parameter-problem' => 1,
779 'ip-header-bad' => 1,
780 'required-option-missing' => 1,
781 'timestamp-request' => 1,
782 'timestamp-reply' => 1,
783 'address-mask-request' => 1,
784 'address-mask-reply' => 1,
787 # ip6tables -p icmpv6 -h
789 my $icmpv6_type_names = {
790 'destination-unreachable' => 1,
792 'communication-prohibited' => 1,
794 'address-unreachable' => 1,
795 'port-unreachable' => 1,
796 'failed-policy' => 1,
798 'packet-too-big' => 1,
799 'time-exceeded' => 1,
800 'ttl-zero-during-transit' => 1,
801 'ttl-zero-during-reassembly' => 1,
802 'parameter-problem' => 1,
804 'unknown-header-type' => 1,
805 'unknown-option' => 1,
808 'router-solicitation' => 1,
809 'router-advertisement' => 1,
810 'neighbor-solicitation' => 1,
811 'neighbour-solicitation' => 1,
812 'neighbor-advertisement' => 1,
813 'neighbour-advertisement' => 1,
817 my $is_valid_icmp_type = sub {
818 my ($type, $valid_types) = @_;
820 if ($type =~ m/^\d+$/) {
821 # values for icmp-type range between 0 and 255 (8 bit field)
822 die "invalid icmp-type '$type'\n" if $type > 255;
824 die "unknown icmp-type '$type'\n" if !defined($valid_types->{$type});
828 sub init_firewall_macros
{
830 $pve_fw_parsed_macros = {};
833 my ($k, $macro) = @_;
834 my $lc_name = lc($k);
835 $pve_fw_macro_ipversion->{$k} = 0;
836 while (!ref($macro->[0])) {
837 my $desc = shift @$macro;
838 if ($desc eq 'ipv4only') {
839 $pve_fw_macro_ipversion->{$k} = 4;
840 } elsif ($desc eq 'ipv6only') {
841 $pve_fw_macro_ipversion->{$k} = 6;
843 $pve_fw_macro_descr->{$k} = $desc;
846 $pve_fw_preferred_macro_names->{$lc_name} = $k;
847 $pve_fw_parsed_macros->{$k} = $macro;
850 foreach my $k (keys %$pve_fw_macros) {
851 &$parse($k, $pve_fw_macros->{$k});
854 foreach my $k (keys %$pve_ipv6fw_macros) {
855 next if $pve_fw_parsed_macros->{$k};
856 &$parse($k, $pve_ipv6fw_macros->{$k});
857 $pve_fw_macro_ipversion->{$k} = 6;
861 init_firewall_macros
();
864 return wantarray ?
($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
869 sub get_etc_services
{
871 return $etc_services if $etc_services;
873 my $filename = "/etc/services";
875 my $fh = IO
::File-
>new($filename, O_RDONLY
);
877 warn "unable to read '$filename' - $!\n";
883 while (my $line = <$fh>) {
885 next if $line =~m/^#/;
886 next if ($line =~m/^\s*$/);
888 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp|sctp).*$!) {
889 $services->{byid
}->{$2}->{name
} = $1;
890 $services->{byid
}->{$2}->{port
} = $2;
891 $services->{byid
}->{$2}->{$3} = 1;
892 $services->{byname
}->{$1} = $services->{byid
}->{$2};
898 $etc_services = $services;
901 return $etc_services;
904 sub parse_protocol_file
{
907 my $fh = IO
::File-
>new($filename, O_RDONLY
);
909 warn "unable to read '$filename' - $!\n";
915 while (my $line = <$fh>) {
917 next if $line =~m/^#/;
918 next if ($line =~m/^\s*$/);
920 if ($line =~ m!^(\S+)\s+(\d+)(?:\s+.*)?$!) {
921 $protocols->{byid
}->{$2}->{name
} = $1;
922 $protocols->{byname
}->{$1} = $protocols->{byid
}->{$2};
933 sub get_etc_protocols
{
934 return $etc_protocols if $etc_protocols;
936 my $protocols = parse_protocol_file
('/etc/protocols');
938 # add special case for ICMP v6
939 $protocols->{byid
}->{icmpv6
}->{name
} = "icmpv6";
940 $protocols->{byname
}->{icmpv6
} = $protocols->{byid
}->{icmpv6
};
942 $etc_protocols = $protocols;
944 return $etc_protocols;
949 sub get_etc_ethertypes
{
950 $etc_ethertypes = parse_protocol_file
('/etc/ethertypes')
952 return $etc_ethertypes;
958 my ($new_value) = @_;
960 $__local_network = $new_value if defined($new_value);
962 return $__local_network if defined($__local_network);
965 my $nodename = PVE
::INotify
::nodename
();
967 my $ip = PVE
::Cluster
::remote_node_ip
($nodename);
969 my $testip = Net
::IP-
>new($ip);
971 my $isv6 = $testip->version == 6;
972 my $routes = $isv6 ? PVE
::ProcFSTools
::read_proc_net_ipv6_route
()
973 : PVE
::ProcFSTools
::read_proc_net_route
();
974 foreach my $entry (@$routes) {
977 $mask = $entry->{prefix
};
978 next if !$mask; # skip the default route...
980 $mask = $PVE::Network
::ipv4_mask_hash_localnet-
>{$entry->{mask
}};
981 next if !defined($mask);
983 my $cidr = "$entry->{dest}/$mask";
984 my $testnet = Net
::IP-
>new($cidr);
985 my $overlap = $testnet->overlaps($testip);
986 if ($overlap == $Net::IP
::IP_B_IN_A_OVERLAP
||
987 $overlap == $Net::IP
::IP_IDENTICAL
)
989 $__local_network = $cidr;
996 return $__local_network;
999 # ipset names are limited to 31 characters,
1000 # and we use '-v4' or '-v6' to indicate IP versions,
1001 # and we use '_swap' suffix for atomic update,
1002 # for example PVEFW-${VMID}-${ipset_name}_swap
1004 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
1006 sub compute_ipset_chain_name
{
1007 my ($vmid, $ipset_name, $ipversion) = @_;
1009 $vmid = 0 if !defined($vmid);
1011 my $id = "$vmid-${ipset_name}-v$ipversion";
1013 if (length($id) > $max_iptables_ipset_name_length) {
1014 $id = PVE
::Tools
::fnv31a_hex
($id);
1020 sub compute_ipfilter_ipset_name
{
1023 return "ipfilter-$iface";
1026 sub parse_address_list
{
1029 if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
1030 die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
1034 if ($str =~ m/^${ip_alias_pattern}$/) {
1035 die "alias name too long\n" if length($str) > $max_alias_name_length;
1043 my @elements = split(/,/, $str);
1044 die "extraneous commas in list\n" if $str ne join(',', @elements);
1045 foreach my $elem (@elements) {
1047 my $ip = Net
::IP-
>new($elem);
1049 my $err = Net
::IP
::Error
();
1050 die "invalid IP address: $err\n";
1052 $iprange = 1 if $elem =~ m/-/;
1054 my $new_ipversion = Net
::IP
::ip_is_ipv6
($ip->ip()) ?
6 : 4;
1056 die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
1057 if $ipversion && ($new_ipversion != $ipversion);
1059 $ipversion = $new_ipversion;
1062 die "you can't use a range in a list\n" if $iprange && $count > 1;
1067 sub parse_port_name_number_or_range
{
1068 my ($str, $dport) = @_;
1070 my $services = PVE
::Firewall
::get_etc_services
();
1074 my @elements = split(/,/, $str);
1075 die "extraneous commas in list\n" if $str ne join(',', @elements);
1076 foreach my $item (@elements) {
1077 if ($item =~ m/^([0-9]+):([0-9]+)$/) {
1079 my ($port1, $port2) = ($1, $2);
1080 die "invalid port '$port1'\n" if $port1 > 65535;
1081 die "invalid port '$port2'\n" if $port2 > 65535;
1082 die "backwards range '$port1:$port2' not allowed, did you mean '$port2:$port1'?\n" if $port1 > $port2;
1083 } elsif ($item =~ m/^([0-9]+)$/) {
1086 die "invalid port '$port'\n" if $port > 65535;
1088 if ($dport && $icmp_type_names->{$item}) {
1090 } elsif ($dport && $icmpv6_type_names->{$item}) {
1093 die "invalid port '$item'\n" if !$services->{byname
}->{$item};
1098 die "ICMP ports not allowed in port range\n" if $icmp_port && $count > 0;
1100 # I really don't like to use the word number here, but it's the only thing
1101 # that makes sense in a literal way. The range 1:100 counts as 2, not as
1102 # one and not as 100...
1103 die "too many entries in port list (> 15 numbers)\n"
1106 return (scalar(@elements) > 1);
1109 PVE
::JSONSchema
::register_format
('pve-fw-sport-spec', \
&pve_fw_verify_sport_spec
);
1110 sub pve_fw_verify_sport_spec
{
1113 parse_port_name_number_or_range
($portstr, 0);
1118 PVE
::JSONSchema
::register_format
('pve-fw-dport-spec', \
&pve_fw_verify_dport_spec
);
1119 sub pve_fw_verify_dport_spec
{
1122 parse_port_name_number_or_range
($portstr, 1);
1127 PVE
::JSONSchema
::register_format
('pve-fw-addr-spec', \
&pve_fw_verify_addr_spec
);
1128 sub pve_fw_verify_addr_spec
{
1131 parse_address_list
($list);
1136 PVE
::JSONSchema
::register_format
('pve-fw-protocol-spec', \
&pve_fw_verify_protocol_spec
);
1137 sub pve_fw_verify_protocol_spec
{
1140 my $protocols = get_etc_protocols
();
1142 die "unknown protocol '$proto'\n" if $proto &&
1143 !(defined($protocols->{byname
}->{$proto}) ||
1144 defined($protocols->{byid
}->{$proto}));
1149 PVE
::JSONSchema
::register_format
('pve-fw-icmp-type-spec', \
&pve_fw_verify_icmp_type_spec
);
1150 sub pve_fw_verify_icmp_type_spec
{
1151 my ($icmp_type) = @_;
1153 if ($icmp_type_names->{$icmp_type} || $icmpv6_type_names->{$icmp_type}) {
1157 die "invalid icmp-type value '$icmp_type'\n" if $icmp_type ne '';
1163 # helper function for API
1165 sub copy_opject_with_digest
{
1168 my $sha = Digest
::SHA-
>new('sha1');
1171 foreach my $k (sort keys %$object) {
1172 my $v = $object->{$k};
1173 next if !defined($v);
1175 $sha->add($k, ':', $v, "\n");
1178 my $digest = $sha->hexdigest;
1180 $res->{digest
} = $digest;
1182 return wantarray ?
($res, $digest) : $res;
1185 sub copy_list_with_digest
{
1188 my $sha = Digest
::SHA-
>new('sha1');
1191 foreach my $entry (@$list) {
1193 foreach my $k (sort keys %$entry) {
1194 my $v = $entry->{$k};
1195 next if !defined($v);
1197 # Note: digest ignores refs ($rule->{errors})
1198 # since Digest::SHA expects a series of bytes,
1199 # we have to encode the value here to prevent errors when
1200 # using utf8 characters (eg. in comments)
1201 $sha->add($k, ':', encode_utf8
($v), "\n") if !ref($v); ;
1206 my $digest = $sha->hexdigest;
1208 foreach my $entry (@$res) {
1209 $entry->{digest
} = $digest;
1212 return wantarray ?
($res, $digest) : $res;
1215 our $cluster_option_properties = {
1217 description
=> "Enable or disable the firewall cluster wide.",
1223 description
=> "Enable ebtables rules cluster wide.",
1229 description
=> "Input policy.",
1232 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1235 description
=> "Output policy.",
1238 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1241 description
=> "Log ratelimiting settings",
1242 type
=> 'string', format
=> {
1245 description
=> 'Enable or disable log rate limiting',
1251 description
=> 'Frequency with which the burst bucket gets refilled',
1253 pattern
=> '[1-9][0-9]*\/(second|minute|hour|day)',
1254 format_description
=> 'rate',
1255 default => '1/second',
1261 description
=> 'Initial burst of packages which will always get logged before the rate is applied',
1269 our $host_option_properties = {
1271 description
=> "Enable host firewall rules.",
1275 log_level_in
=> get_standard_option
('pve-fw-loglevel', {
1276 description
=> "Log level for incoming traffic." }),
1277 log_level_out
=> get_standard_option
('pve-fw-loglevel', {
1278 description
=> "Log level for outgoing traffic." }),
1279 tcp_flags_log_level
=> get_standard_option
('pve-fw-loglevel', {
1280 description
=> "Log level for illegal tcp flags filter." }),
1281 smurf_log_level
=> get_standard_option
('pve-fw-loglevel', {
1282 description
=> "Log level for SMURFS filter." }),
1284 description
=> "Enable SMURFS filter.",
1289 description
=> "Filter illegal combinations of TCP flags.",
1294 nf_conntrack_max
=> {
1295 description
=> "Maximum number of tracked connections.",
1301 nf_conntrack_tcp_timeout_established
=> {
1302 description
=> "Conntrack established timeout.",
1308 nf_conntrack_tcp_timeout_syn_recv
=> {
1309 description
=> "Conntrack syn recv timeout.",
1317 description
=> "Enable NDP (Neighbor Discovery Protocol).",
1322 nf_conntrack_allow_invalid
=> {
1323 description
=> "Allow invalid packets on connection tracking.",
1328 protection_synflood
=> {
1329 description
=> "Enable synflood protection",
1334 protection_synflood_rate
=> {
1335 description
=> "Synflood protection rate syn/sec by ip src.",
1340 protection_synflood_burst
=> {
1341 description
=> "Synflood protection rate burst by ip src.",
1346 log_nf_conntrack
=> {
1347 description
=> "Enable logging of conntrack information.",
1354 our $vm_option_properties = {
1356 description
=> "Enable/disable firewall rules.",
1362 description
=> "Enable/disable MAC address filter.",
1368 description
=> "Enable DHCP.",
1374 description
=> "Enable NDP (Neighbor Discovery Protocol).",
1380 description
=> "Allow sending Router Advertisement.",
1385 description
=> "Enable default IP filters. " .
1386 "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1387 "for every interface. Such ipsets implicitly contain sane default " .
1388 "restrictions such as restricting IPv6 link local addresses to " .
1389 "the one derived from the interface's MAC address. For containers " .
1390 "the configured IP addresses will be implicitly added.",
1395 description
=> "Input policy.",
1398 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1401 description
=> "Output policy.",
1404 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1406 log_level_in
=> get_standard_option
('pve-fw-loglevel', {
1407 description
=> "Log level for incoming traffic." }),
1408 log_level_out
=> get_standard_option
('pve-fw-loglevel', {
1409 description
=> "Log level for outgoing traffic." }),
1414 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.";
1416 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.";
1418 my $rule_properties = {
1420 description
=> "Update rule at position <pos>.",
1425 digest
=> get_standard_option
('pve-config-digest'),
1427 description
=> "Rule type.",
1430 enum
=> ['in', 'out', 'group'],
1433 description
=> "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1436 pattern
=> $security_group_name_pattern,
1441 description
=> "Use predefined standard macro.",
1446 iface
=> get_standard_option
('pve-iface', {
1447 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.",
1451 description
=> "Restrict packet source address. $addr_list_descr",
1452 type
=> 'string', format
=> 'pve-fw-addr-spec',
1457 description
=> "Restrict packet destination address. $addr_list_descr",
1458 type
=> 'string', format
=> 'pve-fw-addr-spec',
1463 description
=> "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1464 type
=> 'string', format
=> 'pve-fw-protocol-spec',
1468 description
=> "Flag to enable/disable a rule.",
1473 log => get_standard_option
('pve-fw-loglevel', {
1474 description
=> "Log level for firewall rule.",
1477 description
=> "Restrict TCP/UDP source port. $port_descr",
1478 type
=> 'string', format
=> 'pve-fw-sport-spec',
1482 description
=> "Restrict TCP/UDP destination port. $port_descr",
1483 type
=> 'string', format
=> 'pve-fw-dport-spec',
1487 description
=> "Descriptive comment.",
1492 description
=> "Specify icmp-type. Only valid if proto equals 'icmp'.",
1493 type
=> 'string', format
=> 'pve-fw-icmp-type-spec',
1498 sub add_rule_properties
{
1499 my ($properties) = @_;
1501 foreach my $k (keys %$rule_properties) {
1502 my $h = $rule_properties->{$k};
1503 # copy data, so that we can modify later without side effects
1504 foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1510 sub delete_rule_properties
{
1511 my ($rule, $delete_str) = @_;
1513 foreach my $opt (PVE
::Tools
::split_list
($delete_str)) {
1514 raise_param_exc
({ 'delete' => "no such property ('$opt')"})
1515 if !defined($rule_properties->{$opt});
1516 raise_param_exc
({ 'delete' => "unable to delete required property '$opt'"})
1517 if $opt eq 'type' || $opt eq 'action';
1518 delete $rule->{$opt};
1524 my $apply_macro = sub {
1525 my ($macro_name, $param, $verify, $ipversion) = @_;
1527 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1528 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1530 if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1531 $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1534 # skip macros which are specific to another ipversion
1535 if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1536 return if $ipversion != $required;
1541 foreach my $templ (@$macro_rules) {
1543 my $param_used = {};
1544 foreach my $k (keys %$templ) {
1545 my $v = $templ->{$k};
1546 if ($v eq 'PARAM') {
1548 $param_used->{$k} = 1;
1549 } elsif ($v eq 'DEST') {
1550 $v = $param->{dest
};
1551 $param_used->{dest
} = 1;
1552 } elsif ($v eq 'SOURCE') {
1553 $v = $param->{source
};
1554 $param_used->{source
} = 1;
1558 my $msg = "missing parameter '$k' in macro '$macro_name'";
1559 raise_param_exc
({ macro => $msg }) if $verify;
1564 foreach my $k (keys %$param) {
1565 next if $k eq 'macro';
1566 next if !defined($param->{$k});
1567 next if $param_used->{$k};
1568 if (defined($rule->{$k})) {
1569 if ($rule->{$k} ne $param->{$k}) {
1570 my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1571 raise_param_exc
({ $k => $msg }) if $verify;
1575 $rule->{$k} = $param->{$k};
1578 push @$rules, $rule;
1584 my $rule_env_iface_lookup = {
1593 my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1595 my $allow_groups = $rule_env eq 'group' ?
0 : 1;
1597 my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1598 die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1600 my $errors = $rule->{errors
} || {};
1602 my $error_count = 0;
1604 my $add_error = sub {
1605 my ($param, $msg) = @_;
1607 raise_param_exc
({ $param => $msg }) if !$noerr;
1609 $errors->{$param} = $msg if !$errors->{$param};
1613 my $set_ip_version = sub {
1616 die "detected mixed ipv4/ipv6 addresses in rule\n"
1617 if $ipversion && ($vers != $ipversion);
1622 my $check_ipset_or_alias_property = sub {
1623 my ($name, $expected_ipversion) = @_;
1625 if (my $value = $rule->{$name}) {
1626 if ($value =~ m/^\+/) {
1627 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1628 &$add_error($name, "no such ipset '$1'")
1629 if !($cluster_conf->{ipset
}->{$1} || ($fw_conf && $fw_conf->{ipset
}->{$1}));
1632 &$add_error($name, "invalid ipset name '$value'");
1634 } elsif ($value =~ m/^${ip_alias_pattern}$/){
1635 my $alias = lc($value);
1636 &$add_error($name, "no such alias '$value'")
1637 if !($cluster_conf->{aliases
}->{$alias} || ($fw_conf && $fw_conf->{aliases
}->{$alias}));
1638 my $e = $fw_conf ?
$fw_conf->{aliases
}->{$alias} : undef;
1639 $e = $cluster_conf->{aliases
}->{$alias} if !$e && $cluster_conf;
1641 &$set_ip_version($e->{ipversion
});
1646 my $type = $rule->{type
};
1647 my $action = $rule->{action
};
1649 &$add_error('type', "missing property") if !$type;
1650 &$add_error('action', "missing property") if !$action;
1653 if ($type eq 'in' || $type eq 'out') {
1654 &$add_error('action', "unknown action '$action'")
1655 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1656 } elsif ($type eq 'group') {
1657 &$add_error('type', "security groups not allowed")
1659 &$add_error('action', "invalid characters in security group name")
1660 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1662 &$add_error('type', "unknown rule type '$type'");
1666 if ($rule->{iface
}) {
1667 &$add_error('type', "parameter -i not allowed for this rule type")
1669 eval { PVE
::JSONSchema
::pve_verify_iface
($rule->{iface
}); };
1670 &$add_error('iface', $@) if $@;
1671 if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1672 &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1673 if $rule->{iface
} !~ m/^net(\d+)$/;
1677 if ($rule->{macro}) {
1678 if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1679 $rule->{macro} = $preferred_name;
1681 &$add_error('macro', "unknown macro '$rule->{macro}'");
1685 if ($rule->{proto
}) {
1686 eval { pve_fw_verify_protocol_spec
($rule->{proto
}); };
1687 &$add_error('proto', $@) if $@;
1688 &$set_ip_version(4) if $rule->{proto
} eq 'icmp';
1689 &$set_ip_version(6) if $rule->{proto
} eq 'icmpv6';
1690 &$set_ip_version(6) if $rule->{proto
} eq 'ipv6-icmp';
1693 if ($rule->{dport
}) {
1694 eval { parse_port_name_number_or_range
($rule->{dport
}, 1); };
1695 &$add_error('dport', $@) if $@;
1696 my $proto = $rule->{proto
};
1697 &$add_error('proto', "missing property - 'dport' requires this property")
1699 &$add_error('dport', "protocol '$proto' does not support ports")
1700 if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1701 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1704 if (my $icmp_type = $rule ->{'icmp-type'}) {
1705 my $proto = $rule->{proto
};
1706 &$add_error('proto', "missing property - 'icmp-type' requires this property")
1707 if $proto ne 'icmp' && $proto ne 'icmpv6' && $proto ne 'ipv6-icmp';
1708 &$add_error('icmp-type', "'icmp-type' cannot be specified together with 'dport'")
1710 if ($proto eq 'icmp' && !$icmp_type_names->{$icmp_type}) {
1711 &$add_error('icmp-type', "invalid icmp-type '$icmp_type' for proto 'icmp'");
1712 } elsif (($proto eq 'icmpv6' || $proto eq 'ipv6-icmp') && !$icmpv6_type_names->{$icmp_type}) {
1713 &$add_error('icmp-type', "invalid icmp-type '$icmp_type' for proto '$proto'");
1717 if ($rule->{sport
}) {
1718 eval { parse_port_name_number_or_range
($rule->{sport
}, 0); };
1719 &$add_error('sport', $@) if $@;
1720 my $proto = $rule->{proto
};
1721 &$add_error('proto', "missing property - 'sport' requires this property")
1723 &$add_error('sport', "protocol '$proto' does not support ports")
1724 if !$PROTOCOLS_WITH_PORTS->{$proto};
1727 if ($rule->{source
}) {
1729 my $source_ipversion = parse_address_list
($rule->{source
});
1730 &$set_ip_version($source_ipversion);
1732 &$add_error('source', $@) if $@;
1733 &$check_ipset_or_alias_property('source', $ipversion);
1736 if ($rule->{dest
}) {
1738 my $dest_ipversion = parse_address_list
($rule->{dest
});
1739 &$set_ip_version($dest_ipversion);
1741 &$add_error('dest', $@) if $@;
1742 &$check_ipset_or_alias_property('dest', $ipversion);
1745 $rule->{ipversion
} = $ipversion if $ipversion;
1747 if ($rule->{macro} && !$error_count) {
1748 eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1750 if (ref($err) eq "PVE::Exception" && $err->{errors
}) {
1751 my $eh = $err->{errors
};
1752 foreach my $p (keys %$eh) {
1753 &$add_error($p, $eh->{$p});
1756 &$add_error('macro', "$err");
1761 $rule->{errors
} = $errors if $error_count;
1766 sub copy_rule_data
{
1767 my ($rule, $param) = @_;
1769 foreach my $k (keys %$rule_properties) {
1770 if (defined(my $v = $param->{$k})) {
1771 if ($v eq '' || $v eq '-') {
1782 sub rules_modify_permissions
{
1783 my ($rule_env) = @_;
1785 if ($rule_env eq 'host') {
1787 check
=> ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1789 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1791 check
=> ['perm', '/', [ 'Sys.Modify' ]],
1793 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1795 check
=> ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1802 sub rules_audit_permissions
{
1803 my ($rule_env) = @_;
1805 if ($rule_env eq 'host') {
1807 check
=> ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1809 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1811 check
=> ['perm', '/', [ 'Sys.Audit' ]],
1813 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1815 check
=> ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1824 sub enable_bridge_firewall
{
1827 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1828 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1830 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1831 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/ipv4/tcp_syncookies", "1");
1835 sub iptables_restore_cmdlist
{
1836 my ($cmdlist, $table) = @_;
1838 $table = 'filter' if !$table;
1839 run_command
(['iptables-restore', '-T', $table, '-n'], input
=> $cmdlist, errmsg
=> "iptables_restore_cmdlist");
1842 sub ip6tables_restore_cmdlist
{
1843 my ($cmdlist, $table) = @_;
1845 $table = 'filter' if !$table;
1846 run_command
(['ip6tables-restore', '-T', $table, '-n'], input
=> $cmdlist, errmsg
=> "iptables_restore_cmdlist");
1849 sub ipset_restore_cmdlist
{
1852 run_command
(['ipset', 'restore'], input
=> $cmdlist, errmsg
=> "ipset_restore_cmdlist");
1855 sub ebtables_restore_cmdlist
{
1858 run_command
(['ebtables-restore'], input
=> $cmdlist, errmsg
=> "ebtables_restore_cmdlist");
1861 sub iptables_get_chains
{
1862 my ($iptablescmd, $t) = @_;
1864 $iptablescmd = "iptables" if !$iptablescmd;
1865 $t = 'filter' if !$t;
1869 # check what chains we want to track
1870 my $is_pvefw_chain = sub {
1873 return 1 if $name =~ m/^PVEFW-\S+$/;
1875 return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1877 return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1879 return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1880 return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1892 return if $line =~ m/^#/;
1893 return if $line =~ m/^\s*$/;
1895 if ($line =~ m/^\*(\S+)$/) {
1900 return if $table ne $t;
1902 if ($line =~ m/^:(\S+)\s/) {
1904 return if !&$is_pvefw_chain($chain);
1905 $res->{$chain} = "unknown";
1906 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1907 my ($chain, $sig) = ($1, $2);
1908 return if !&$is_pvefw_chain($chain);
1909 $res->{$chain} = $sig;
1910 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD|PREROUTING)\s+-j\s+PVEFW-\1$/) {
1913 # simply ignore the rest
1918 run_command
(["$iptablescmd-save"], outfunc
=> $parser);
1920 return wantarray ?
($res, $hooks) : $res;
1923 sub iptables_chain_digest
{
1925 my $digest = Digest
::SHA-
>new('sha1');
1926 foreach my $rule (@$rules) { # order is important
1927 $digest->add($rule);
1929 return $digest->b64digest;
1932 sub ipset_chain_digest
{
1935 my $digest = Digest
::SHA-
>new('sha1');
1936 foreach my $rule (sort @$rules) { # note: sorted
1937 $digest->add($rule);
1939 return $digest->b64digest;
1942 sub ipset_get_chains
{
1950 return if $line =~ m/^#/;
1951 return if $line =~ m/^\s*$/;
1952 if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1954 # ignore initval from ipset v7.7+, won't set that yet so it'd mess up change detection
1955 $line =~ s/\binitval 0x[0-9a-f]+//;
1956 $line =~ s/\s+$//; # delete trailing white space
1957 push @{$chains->{$chain}}, $line;
1959 # simply ignore the rest
1964 run_command
(['ipset', 'save'], outfunc
=> $parser);
1966 # compute digest for each chain
1967 foreach my $chain (keys %$chains) {
1968 $res->{$chain} = ipset_chain_digest
($chains->{$chain});
1974 sub ebtables_get_chains
{
1981 return if $line =~ m/^#/;
1982 return if $line =~ m/^\s*$/;
1983 if ($line =~ m/^\*(\S+)$/) {
1988 return if $table ne "filter";
1990 if ($line =~ m/^:(\S+)\s(ACCEPT|DROP|RETURN)$/) {
1991 # Make sure we know chains exist even if they're empty.
1992 $chains->{$1} //= [];
1993 $res->{$1}->{policy
} = $2;
1994 } elsif ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
1997 push @{$chains->{$chain}}, $line;
1999 # simply ignore the rest
2004 run_command
(['ebtables-save'], outfunc
=> $parser);
2005 # compute digest for each chain and store rules as well
2006 foreach my $chain (keys %$chains) {
2007 $res->{$chain}->{rules
} = $chains->{$chain};
2008 $res->{$chain}->{sig
} = iptables_chain_digest
($chains->{$chain});
2013 # substitute action of rule according to action hash
2014 sub rule_substitude_action
{
2015 my ($rule, $actions) = @_;
2017 if (my $action = $rule->{action
}) {
2018 $rule->{action
} = $actions->{$action} if defined($actions->{$action});
2022 # generate a src or dst match
2023 # $dir(ection) is either d or s
2024 sub ipt_gen_src_or_dst_match
{
2025 my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
2030 } elsif ($dir eq 'd') {
2033 die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
2037 if ($adr =~ m/^\+/) {
2038 if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
2041 if ($fw_conf && $fw_conf->{ipset
}->{$name}) {
2042 $ipset_chain = compute_ipset_chain_name
($fw_conf->{vmid
}, $name, $ipversion);
2043 } elsif ($cluster_conf && $cluster_conf->{ipset
}->{$name}) {
2044 $ipset_chain = compute_ipset_chain_name
(0, $name, $ipversion);
2046 die "no such ipset '$name'\n";
2048 $match = "-m set --match-set ${ipset_chain} ${srcdst}";
2050 die "invalid security group name '$adr'\n";
2052 } elsif ($adr =~ m/^${ip_alias_pattern}$/){
2053 my $alias = lc($adr);
2054 my $e = $fw_conf ?
$fw_conf->{aliases
}->{$alias} : undef;
2055 $e = $cluster_conf->{aliases
}->{$alias} if !$e && $cluster_conf;
2056 die "no such alias '$adr'\n" if !$e;
2057 $match = "-${dir} $e->{cidr}";
2058 } elsif ($adr =~ m/\-/){
2059 $match = "-m iprange --${srcdst}-range $adr";
2061 $match = "-${dir} $adr";
2067 # convert a %rule to an array of iptables commands
2068 sub ipt_rule_to_cmds
{
2069 my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
2071 die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
2075 if (defined $rule->{match
}) {
2076 push @match, $rule->{match
};
2078 push @match, "-i $rule->{iface_in}" if $rule->{iface_in
};
2079 push @match, "-o $rule->{iface_out}" if $rule->{iface_out
};
2081 if ($rule->{source
}) {
2082 push @match, ipt_gen_src_or_dst_match
($rule->{source
}, 's', $ipversion, $cluster_conf, $fw_conf);
2084 if ($rule->{dest
}) {
2085 push @match, ipt_gen_src_or_dst_match
($rule->{dest
}, 'd', $ipversion, $cluster_conf, $fw_conf);
2088 if (my $proto = $rule->{proto
}) {
2089 push @match, "-p $proto";
2091 my $multidport = defined($rule->{dport
}) && parse_port_name_number_or_range
($rule->{dport
}, 1);
2092 my $multisport = defined($rule->{sport
}) && parse_port_name_number_or_range
($rule->{sport
}, 0);
2094 my $add_dport = sub {
2095 return if !defined($rule->{dport
});
2097 # NOTE: we re-use dport to store --icmp-type for icmp* protocol
2098 if ($proto eq 'icmp') {
2099 $is_valid_icmp_type->($rule->{dport
}, $icmp_type_names);
2100 push @match, "-m icmp --icmp-type $rule->{dport}";
2101 } elsif ($proto eq 'icmpv6') {
2102 $is_valid_icmp_type->($rule->{dport
}, $icmpv6_type_names);
2103 push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
2104 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
2105 die "protocol $proto does not have ports\n";
2106 } elsif ($multidport) {
2107 push @match, "--match multiport", "--dports $rule->{dport}";
2109 return if !$rule->{dport
};
2110 push @match, "--dport $rule->{dport}";
2114 my $add_sport = sub {
2115 return if !$rule->{sport
};
2117 die "protocol $proto does not have ports\n"
2118 if !$PROTOCOLS_WITH_PORTS->{$proto};
2120 push @match, "--match multiport", "--sports $rule->{sport}";
2122 push @match, "--sport $rule->{sport}";
2126 my $add_icmp_type = sub {
2127 return if !defined($rule->{'icmp-type'}) || $rule->{'icmp-type'} eq '';
2129 die "'icmp-type' can only be set if 'icmp', 'icmpv6' or 'ipv6-icmp' is specified\n"
2130 if ($proto ne 'icmp') && ($proto ne 'icmpv6') && ($proto ne 'ipv6-icmp');
2131 my $type = $proto eq 'icmp' ?
'icmp-type' : 'icmpv6-type';
2133 push @match, "-m $proto --$type $rule->{'icmp-type'}";
2136 # order matters - single port before multiport!
2138 $add_dport->() if $multisport;
2140 $add_dport->() if !$multisport;
2141 } elsif ($rule->{dport
} || $rule->{sport
}) {
2142 die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport
};
2143 die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport
};
2146 push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype
};
2148 my $matchstr = scalar(@match) ?
join(' ', @match) : "";
2151 if (defined $rule->{target
}) {
2152 $targetstr = $rule->{target
};
2154 my $action = (defined $rule->{action
}) ?
$rule->{action
} : "";
2155 my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
2156 $targetstr = ($goto) ?
"-g $action" : "-j $action";
2160 my $log = $rule->{log};
2161 if (defined($log) && $log ne 'nolog') {
2162 my $loglevel = $log_level_hash->{$log};
2163 my $logaction = get_log_rule_base
($chain, $vmid, $rule->{logmsg
}, $loglevel);
2164 push @iptcmds, "-A $chain $matchstr $logaction";
2166 push @iptcmds, "-A $chain $matchstr $targetstr";
2170 sub ruleset_generate_rule
{
2171 my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf, $vmid) = @_;
2175 if ($rule->{macro}) {
2176 $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
2181 # update all or nothing
2183 foreach my $r (@$rules) {
2184 push @ipt_rule_cmds, ipt_rule_to_cmds
($r, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid);
2186 foreach my $c (@ipt_rule_cmds) {
2187 ruleset_add_ipt_cmd
($ruleset, $chain, $c);
2191 sub ruleset_create_chain
{
2192 my ($ruleset, $chain) = @_;
2194 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
2195 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
2197 die "chain '$chain' already exists\n" if $ruleset->{$chain};
2199 $ruleset->{$chain} = [];
2202 sub ruleset_chain_exist
{
2203 my ($ruleset, $chain) = @_;
2205 return $ruleset->{$chain} ?
1 : undef;
2208 # add an iptables command (like generated by ipt_rule_to_cmds) to a chain
2209 sub ruleset_add_ipt_cmd
{
2210 my ($ruleset, $chain, $iptcmd) = @_;
2212 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2214 push @{$ruleset->{$chain}}, $iptcmd;
2217 sub ruleset_addrule
{
2218 my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
2220 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2223 my $loglevel = $log_level_hash->{$log};
2224 my $logaction = get_log_rule_base
($chain, $vmid, $logmsg, $loglevel);
2225 push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
2227 # for stable ebtables digests avoid double-spaces to match ebtables-save output
2228 $match .= ' ' if length($match);
2229 push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
2232 sub ruleset_insertrule
{
2233 my ($ruleset, $chain, $match, $action, $log) = @_;
2235 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2237 unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2240 sub get_log_rule_base
{
2241 my ($chain, $vmid, $msg, $loglevel) = @_;
2243 $vmid = 0 if !defined($vmid);
2244 $msg = "" if !defined($msg);
2247 if (defined($global_log_ratelimit)) {
2248 $rlimit = "-m limit $global_log_ratelimit ";
2251 # Note: we use special format for prefix to pass further
2252 # info to log daemon (VMID, LOGLEVEL and CHAIN)
2253 return "${rlimit}-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2256 sub ruleset_add_chain_policy {
2257 my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2259 if ($policy eq 'ACCEPT') {
2261 my $rule = { action => 'ACCEPT' };
2262 rule_substitude_action($rule, { ACCEPT => $accept_action});
2263 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2265 } elsif ($policy eq 'DROP') {
2267 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop
");
2269 ruleset_addrule($ruleset, $chain, "", "-j DROP
", $loglevel, "policy
$policy: ", $vmid);
2270 } elsif ($policy eq 'REJECT') {
2271 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject
");
2273 ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject
", $loglevel, "policy
$policy: ", $vmid);
2276 die "internal error
: unknown policy
'$policy'";
2280 sub ruleset_chain_add_ndp {
2281 my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2282 return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2284 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-solicitation
", $accept);
2285 if ($direction ne 'OUT' || $options->{radv}) {
2286 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-advertisement
", $accept);
2288 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type neighbor-solicitation
", $accept);
2289 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type neighbor-advertisement
", $accept);
2292 sub ruleset_chain_add_conn_filters {
2293 my ($ruleset, $chain, $allow_invalid, $accept) = @_;
2295 if (!$allow_invalid) {
2296 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
", "-j DROP
");
2298 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
", "-j
$accept");
2301 sub ruleset_chain_add_input_filters {
2302 my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2304 if ($cluster_conf->{ipset}->{blacklist}){
2305 if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist
")) {
2306 ruleset_create_chain($ruleset, "PVEFW-blacklist
");
2307 ruleset_addrule($ruleset, "PVEFW-blacklist
", "", "-j DROP
", $loglevel, "DROP
: ", 0);
2309 my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2310 ruleset_addrule($ruleset, $chain, "-m set
--match-set
${ipset_chain
} src
", "-j PVEFW-blacklist
");
2313 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2314 if ($ipversion == 4) {
2315 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
,NEW
", "-j PVEFW-smurfs
");
2319 if ($options->{tcpflags}) {
2320 ruleset_addrule($ruleset, $chain, "-p tcp
", "-j PVEFW-tcpflags
");
2324 sub ruleset_create_vm_chain {
2325 my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2327 ruleset_create_chain($ruleset, $chain);
2328 my $accept = generate_nfqueue($options);
2330 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2331 if ($ipversion == 4) {
2332 if ($direction eq 'OUT') {
2333 ruleset_generate_rule($ruleset, $chain, $ipversion,
2334 { action => 'PVEFW-SET-ACCEPT-MARK',
2335 proto => 'udp', sport => 68, dport => 67 });
2337 ruleset_generate_rule($ruleset, $chain, $ipversion,
2338 { action => 'ACCEPT',
2339 proto => 'udp', sport => 67, dport => 68 });
2341 } elsif ($ipversion == 6) {
2342 if ($direction eq 'OUT') {
2343 ruleset_generate_rule($ruleset, $chain, $ipversion,
2344 { action => 'PVEFW-SET-ACCEPT-MARK',
2345 proto => 'udp', sport => 546, dport => 547 });
2347 ruleset_generate_rule($ruleset, $chain, $ipversion,
2348 { action => 'ACCEPT',
2349 proto => 'udp', sport => 547, dport => 546 });
2355 if ($direction eq 'OUT') {
2356 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2357 ruleset_addrule($ruleset, $chain, "-m mac
! --mac-source
$macaddr", "-j DROP
");
2359 if ($ipversion == 6 && !$options->{radv}) {
2360 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-advertisement
", "-j DROP
");
2362 if ($ipfilter_ipset) {
2363 ruleset_addrule($ruleset, $chain, "-m set
! --match-set
$ipfilter_ipset src
", "-j DROP
");
2365 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2368 my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j
$accept";
2369 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2372 sub ruleset_add_group_rule {
2373 my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2375 my $group = $rule->{action};
2376 my $group_chain = "GROUP-
$group-$direction";
2377 if(!ruleset_chain_exist($ruleset, $group_chain)){
2378 generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2381 if ($direction eq 'OUT' && $rule->{iface_out}) {
2382 ruleset_addrule($ruleset, $chain, "-o
$rule->{iface_out
}", "-j
$group_chain");
2383 } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2384 ruleset_addrule($ruleset, $chain, "-i
$rule->{iface_in
}", "-j
$group_chain");
2386 ruleset_addrule($ruleset, $chain, "", "-j
$group_chain");
2389 ruleset_addrule($ruleset, $chain, "-m mark
--mark
$FWACCEPTMARK_ON", "-j
$action");
2392 sub ruleset_generate_vm_rules {
2393 my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion, $vmid) = @_;
2395 my $lc_direction = lc($direction);
2397 my $in_accept = generate_nfqueue($options);
2399 foreach my $rule (@$rules) {
2400 next if $rule->{iface} && $rule->{iface} ne $netid;
2401 next if !$rule->{enable} || $rule->{errors};
2402 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2404 if ($rule->{type} eq 'group') {
2405 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2406 $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2408 next if $rule->{type} ne $lc_direction;
2410 $rule->{logmsg} = "$rule->{action
}: ";
2411 if ($direction eq 'OUT') {
2412 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" });
2413 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2415 rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject
" });
2416 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2424 sub generate_nfqueue {
2427 if ($options->{ips}) {
2428 my $action = "NFQUEUE
";
2429 if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2430 if (defined($3) && defined($1)) {
2431 $action .= " --queue-balance
$1:$3";
2432 } elsif (defined($1)) {
2433 $action .= " --queue-num
$1";
2436 $action .= " --queue-bypass
" if $feature_ipset_nomatch; #need kernel 3.10
2443 sub ruleset_generate_vm_ipsrules {
2444 my ($ruleset, $options, $direction, $iface) = @_;
2446 if ($options->{ips} && $direction eq 'IN') {
2447 my $nfqueue = generate_nfqueue($options);
2449 if (!ruleset_chain_exist($ruleset, "PVEFW-IPS
")) {
2450 ruleset_create_chain($ruleset, "PVEFW-IPS
");
2453 ruleset_addrule($ruleset, "PVEFW-IPS
", "-m physdev
--physdev-out
$iface --physdev-is-bridged
", "-j
$nfqueue");
2457 sub generate_tap_rules_direction {
2458 my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2460 my $lc_direction = lc($direction);
2462 my $rules = $vmfw_conf->{rules};
2464 my $options = $vmfw_conf->{options};
2465 my $loglevel = get_option_log_level($options, "log_level_
${lc_direction
}");
2467 my $tapchain = "$iface-$direction";
2469 my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2470 my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2471 if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2473 if ($options->{enable}) {
2474 # create chain with mac and ip filter
2475 ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2477 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion, $vmid);
2479 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2484 if ($direction eq 'OUT') {
2485 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2487 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2490 my $accept = generate_nfqueue($options);
2491 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : $accept;
2492 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2494 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : 'ACCEPT';
2495 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2498 # plug the tap chain to bridge chain
2499 if ($direction eq 'IN') {
2500 ruleset_addrule($ruleset, "PVEFW-FWBR-IN
",
2501 "-m physdev
--physdev-is-bridged
--physdev-out
$iface", "-j
$tapchain");
2503 ruleset_addrule($ruleset, "PVEFW-FWBR-OUT
",
2504 "-m physdev
--physdev-is-bridged
--physdev-in
$iface", "-j
$tapchain");
2508 sub enable_host_firewall {
2509 my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf) = @_;
2511 my $options = $hostfw_conf->{options};
2512 my $cluster_options = $cluster_conf->{options};
2513 my $rules = $hostfw_conf->{rules};
2514 my $cluster_rules = $cluster_conf->{rules};
2516 # corosync preparation
2517 my $corosync_rule = "-p udp
--dport
5404:5405";
2518 my $corosync_local_addresses = {};
2519 my $multicast_enabled;
2520 my $local_hostname = PVE::INotify::nodename();
2521 if (defined($corosync_conf)) {
2522 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2523 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2525 if ($node_name eq $local_hostname) {
2526 $corosync_local_addresses->{$key} = $node_ip;
2530 # allow multicast only if enabled in config
2531 my $corosync_transport = $corosync_conf->{main}->{totem}->{transport};
2532 $multicast_enabled = defined($corosync_transport) && $corosync_transport eq 'udp';
2535 # host inbound firewall
2536 my $chain = "PVEFW-HOST-IN
";
2537 ruleset_create_chain($ruleset, $chain);
2539 my $loglevel = get_option_log_level($options, "log_level_in
");
2541 ruleset_addrule($ruleset, $chain, "-i lo
", "-j ACCEPT
");
2543 ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2544 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2545 ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2547 # we use RETURN because we need to check also tap rules
2548 my $accept_action = 'RETURN';
2550 ruleset_addrule($ruleset, $chain, "-p igmp
", "-j
$accept_action"); # important for multicast
2552 # add host rules first, so that cluster wide rules can be overwritten
2553 foreach my $rule (@$rules, @$cluster_rules) {
2554 next if !$rule->{enable} || $rule->{errors};
2555 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2557 $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2560 $rule->{logmsg} = "$rule->{action
}: ";
2561 if ($rule->{type} eq 'group') {
2562 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2563 } elsif ($rule->{type} eq 'in') {
2564 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" });
2565 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2569 delete $rule->{iface_in};
2572 # allow standard traffic for management ipset (includes cluster network)
2573 my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management
", $ipversion);
2574 my $mngmntsrc = "-m set
--match-set
${mngmnt_ipset_chain
} src
";
2575 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
8006", "-j
$accept_action"); # PVE API
2576 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
5900:5999", "-j
$accept_action"); # PVE VNC Console
2577 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
3128", "-j
$accept_action"); # SPICE Proxy
2578 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
22", "-j
$accept_action"); # SSH
2579 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
60000:60050", "-j
$accept_action"); # Migration
2581 # corosync inbound rules
2582 if (defined($corosync_conf)) {
2583 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
$corosync_rule", "-j
$accept_action")
2584 if $multicast_enabled;
2586 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2587 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2588 my $destination = $corosync_local_addresses->{$key};
2590 if ($node_name ne $local_hostname && defined($destination)) {
2591 # accept only traffic on same ring
2592 ruleset_addrule($ruleset, $chain, "-d
$destination -s
$node_ip $corosync_rule", "-j
$accept_action");
2597 # implement input policy
2598 my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2599 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2601 # host outbound firewall
2602 $chain = "PVEFW-HOST-OUT
";
2603 ruleset_create_chain($ruleset, $chain);
2605 $loglevel = get_option_log_level($options, "log_level_out
");
2607 ruleset_addrule($ruleset, $chain, "-o lo
", "-j ACCEPT
");
2609 ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2611 # we use RETURN because we may want to check other thigs later
2612 $accept_action = 'RETURN';
2613 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j
$accept_action");
2615 ruleset_addrule($ruleset, $chain, "-p igmp
", "-j
$accept_action"); # important for multicast
2617 # add host rules first, so that cluster wide rules can be overwritten
2618 foreach my $rule (@$rules, @$cluster_rules) {
2619 next if !$rule->{enable} || $rule->{errors};
2620 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2622 $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2624 $rule->{logmsg} = "$rule->{action
}: ";
2625 if ($rule->{type} eq 'group') {
2626 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2627 } elsif ($rule->{type} eq 'out') {
2628 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" });
2629 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2633 delete $rule->{iface_out};
2636 # allow standard traffic on cluster network
2637 my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2638 my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2640 if ($localnet && ($ipversion == $localnet_ver)) {
2641 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
8006", "-j
$accept_action"); # PVE API
2642 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
22", "-j
$accept_action"); # SSH
2643 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
5900:5999", "-j
$accept_action"); # PVE VNC Console
2644 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
3128", "-j
$accept_action"); # SPICE Proxy
2647 # corosync outbound rules
2648 if (defined($corosync_conf)) {
2649 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
$corosync_rule", "-j
$accept_action")
2650 if $multicast_enabled;
2652 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2653 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2654 my $source = $corosync_local_addresses->{$key};
2656 if ($node_name ne $local_hostname && defined($source)) {
2657 # accept only traffic on same ring
2658 ruleset_addrule($ruleset, $chain, "-s
$source -d
$node_ip $corosync_rule", "-j
$accept_action");
2663 # implement output policy
2664 $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2665 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2667 ruleset_addrule($ruleset, "PVEFW-OUTPUT
", "", "-j PVEFW-HOST-OUT
");
2668 ruleset_addrule($ruleset, "PVEFW-INPUT
", "", "-j PVEFW-HOST-IN
");
2671 sub generate_group_rules {
2672 my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2674 my $rules = $cluster_conf->{groups}->{$group};
2677 warn "no such security group
'$group'\n";
2678 $rules = []; # create empty chain
2681 my $chain = "GROUP-
${group
}-IN
";
2683 ruleset_create_chain($ruleset, $chain);
2684 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2686 foreach my $rule (@$rules) {
2687 next if $rule->{type} ne 'in';
2688 next if !$rule->{enable} || $rule->{errors};
2689 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2690 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" });
2691 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2694 $chain = "GROUP-
${group
}-OUT
";
2696 ruleset_create_chain($ruleset, $chain);
2697 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2699 foreach my $rule (@$rules) {
2700 next if $rule->{type} ne 'out';
2701 next if !$rule->{enable} || $rule->{errors};
2702 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2703 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2704 # check also other tap rules later
2705 rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject
" });
2706 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2711 my $valid_netdev_names = {};
2712 for (my $i = 0; $i < $MAX_NETS; $i++) {
2713 $valid_netdev_names->{"net
$i"} = 1;
2716 sub get_mark_values {
2717 my ($value, $mask) = @_;
2718 $value = hex($value) if $value =~ /^0x/;
2719 $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2720 $mask = 0xffffffff if !defined($mask);
2721 return ($value, $mask);
2725 my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env) = @_;
2727 my $orig_line = $line;
2731 # we can add single line comments to the end of the rule
2732 if ($line =~ s/#\s*(.*?)\s*$//) {
2733 $rule->{comment} = decode('utf8', $1);
2736 # we can disable a rule when prefixed with '|'
2738 $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2740 $line =~ s/^(\S+)\s+(\S+)\s*// ||
2741 die "unable to parse rule
: $line\n";
2743 $rule->{type} = lc($1);
2744 $rule->{action} = $2;
2746 if ($rule->{type} eq 'in' || $rule->{type} eq 'out') {
2747 if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2748 $rule->{macro} = $1;
2749 $rule->{action} = $2;
2753 while (length($line)) {
2754 if ($line =~ s/^-i (\S+)\s*//) {
2755 $rule->{iface} = $1;
2759 last if $rule->{type} eq 'group';
2761 if ($line =~ s/^(?:-p|--?proto) (\S+)\s*//) {
2762 $rule->{proto} = $1;
2766 if ($line =~ s/^--?dport (\S+)\s*//) {
2767 $rule->{dport} = $1;
2771 if ($line =~ s/^--?sport (\S+)\s*//) {
2772 $rule->{sport} = $1;
2775 if ($line =~ s/^--?source (\S+)\s*//) {
2776 $rule->{source} = $1;
2779 if ($line =~ s/^--?dest (\S+)\s*//) {
2783 if ($line =~ s/^--?log (emerg|alert|crit|err|warning|notice|info|debug|nolog)\s*//) {
2787 if ($line =~ s/^--?icmp-type (\S+)\s*//) {
2788 $rule->{'icmp-type'} = $1;
2795 die "unable to parse rule parameters
: $line\n" if length($line);
2797 $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2798 if ($rule->{errors}) {
2799 # The verbose flag really means we're running from the CLI and want
2800 # output on the console - in the other case we really want such errors
2801 # to go into the syslog instead.
2802 my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2803 $log->("$prefix - errors
in rule parameters
: $orig_line\n");
2804 foreach my $p (keys %{$rule->{errors}}) {
2805 $log->(" $p: $rule->{errors
}->{$p}\n");
2812 sub verify_ethertype {
2814 my $types = get_etc_ethertypes();
2815 die "unknown ethernet protocol type
: $value\n"
2816 if !defined($types->{byname}->{$value}) &&
2817 !defined($types->{byid}->{$value});
2820 sub parse_vmfw_option {
2825 my $loglevels = "emerg
|alert
|crit
|err
|warning
|notice
|info
|debug
|nolog
";
2827 if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2830 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2832 $value = $2 ? lc($3) : '';
2833 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2836 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2839 } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
2842 verify_ethertype($_) foreach split(/\s*,\s*/, $value);
2844 die "can
't parse option '$line'\n"
2847 return ($opt, $value);
2850 sub parse_hostfw_option {
2855 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2857 if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid|protection_synflood):\s*(0|1)\s*$/i) {
2860 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2862 $value = $2 ? lc($3) : '';
2863 } elsif ($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*$/i) {
2867 die "can't parse option
'$line'\n"
2870 return ($opt, $value);
2873 sub parse_clusterfw_option {
2878 if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2881 if (($value > 1) && ((time() - $value) > 60)) {
2884 } elsif ($line =~ m/^(ebtables):\s*(0|1)\s*$/i) {
2887 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2890 } elsif ($line =~ m/^(log_ratelimit):\s*(\S+)\s*$/) {
2894 die "can
't parse option '$line'\n"
2897 return ($opt, $value);
2901 my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2903 my $alias = lc($cidr);
2904 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2905 $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2907 die "no such alias '$cidr'\n" if !$e;;
2909 return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2912 sub parse_ip_or_cidr {
2917 if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2920 } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2924 die "value does not look like a valid IP address or CIDR network\n";
2927 return wantarray ? ($cidr, $ipversion) : $cidr;
2933 # we can add single line comments to the end of the line
2934 my $comment = decode('utf8
', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2936 if ($line =~ m/^(\S+)\s(\S+)$/) {
2937 my ($name, $cidr) = ($1, $2);
2940 ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2945 ipversion => $ipversion,
2947 $data->{comment} = $comment if $comment;
2954 sub generic_fw_config_parser {
2955 my ($filename, $cluster_conf, $empty_conf, $rule_env) = @_;
2960 my $res = $empty_conf;
2963 if ($filename =~ m!^/etc/pve/(.*)$!) {
2964 $raw = PVE::Cluster::get_config($1);
2966 $raw = eval { PVE::Tools::file_get_contents($filename) }; # ignore errors
2970 my $curr_group_keys = {};
2973 while ($raw =~ /^\h*(.*?)\h*$/gm) {
2976 next if $line =~ m/^#/;
2977 next if $line =~ m/^\s*$/;
2980 my $prefix = "$filename (line $linenr)";
2982 if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2983 $section = 'options
';
2987 if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2988 $section = 'aliases
';
2992 if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2993 $section = 'groups
';
2997 die "security group name too long\n" if length($group) > $max_group_name_length;
2998 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
3001 ($section, $group, $comment) = undef;
3002 warn "$prefix: $err";
3006 $res->{$section}->{$group} = [];
3007 $res->{group_comments}->{$group} = decode('utf8
', $comment)
3012 if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
3017 if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
3022 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
3023 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
3026 ($section, $group, $comment) = undef;
3027 warn "$prefix: $err";
3031 $res->{$section}->{$group} = [];
3032 $curr_group_keys = {};
3034 $res->{ipset_comments}->{$group} = decode('utf8
', $comment)
3040 warn "$prefix: skip line - no section\n";
3044 if ($section eq 'options
') {
3047 if ($rule_env eq 'cluster
') {
3048 ($opt, $value) = parse_clusterfw_option($line);
3049 } elsif ($rule_env eq 'host
') {
3050 ($opt, $value) = parse_hostfw_option($line);
3052 ($opt, $value) = parse_vmfw_option($line);
3054 $res->{options}->{$opt} = $value;
3056 warn "$prefix: $@" if $@;
3057 } elsif ($section eq 'aliases
') {
3059 my $data = parse_alias($line);
3060 $res->{aliases}->{lc($data->{name})} = $data;
3062 warn "$prefix: $@" if $@;
3063 } elsif ($section eq 'rules
') {
3065 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env); };
3067 warn "$prefix: $err";
3070 push @{$res->{$section}}, $rule;
3071 } elsif ($section eq 'groups
') {
3073 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group
'); };
3075 warn "$prefix: $err";
3078 push @{$res->{$section}->{$group}}, $rule;
3079 } elsif ($section eq 'ipset
') {
3080 # we can add single line comments to the end of the rule
3081 my $comment = decode('utf8
', $1) if $line =~ s/#\s*(.*?)\s*$//;
3083 $line =~ m/^(\!)?\s*(\S+)\s*$/;
3088 if ($nomatch && !$feature_ipset_nomatch) {
3089 $errors->{nomatch} = "nomatch not supported by kernel";
3093 if ($cidr =~ m/^${ip_alias_pattern}$/) {
3094 resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
3096 $cidr = parse_ip_or_cidr($cidr);
3098 die "duplicate ipset entry for '$cidr'\n"
3099 if defined($curr_group_keys->{$cidr});
3103 $errors->{cidr} = $err;
3106 if ($cidr =~ m!/0+$!) {
3107 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
3110 my $entry = { cidr => $cidr };
3111 $entry->{nomatch} = 1 if $nomatch;
3112 $entry->{comment} = $comment if $comment;
3113 $entry->{errors} = $errors if $errors;
3115 if ($verbose && $errors) {
3116 warn "$prefix - errors in ipset '$group': $line\n";
3117 foreach my $p (keys %{$errors}) {
3118 warn " $p: $errors->{$p}\n";
3122 push @{$res->{$section}->{$group}}, $entry;
3123 $curr_group_keys->{$cidr} = 1;
3125 warn "$prefix: skip line - unknown section\n";
3133 # this is only used to prevent concurrent runs of rule compilation/application
3134 # see lock_*_conf for cfs locks protectiong config modification
3136 my ($code, @param) = @_;
3140 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
3147 sub read_local_vm_config {
3152 my $vmdata = { qemu => $qemu, lxc => $lxc };
3154 my $vmlist = PVE::Cluster::get_vmlist();
3155 return $vmdata if !$vmlist || !$vmlist->{ids};
3156 my $ids = $vmlist->{ids};
3158 foreach my $vmid (keys %$ids) {
3159 next if !$vmid; # skip VE0
3160 my $d = $ids->{$vmid};
3161 next if !$d->{node} || $d->{node} ne $nodename;
3162 next if !$d->{type};
3163 if ($d->{type} eq 'qemu
') {
3164 if ($have_qemu_server) {
3165 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
3166 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3167 $qemu->{$vmid} = $conf;
3170 } elsif ($d->{type} eq 'lxc
') {
3172 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
3173 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3174 $lxc->{$vmid} = $conf;
3183 sub lock_vmfw_conf {
3184 my ($vmid, $timeout, $code, @param) = @_;
3186 die "can't
lock VM firewall config
for undefined VMID
\n"
3189 my $res = PVE::Cluster::cfs_lock_firewall("vm-
$vmid", $timeout, $code, @param);
3195 sub load_vmfw_conf {
3196 my ($cluster_conf, $rule_env, $vmid, $dir) = @_;
3198 $dir = $pvefw_conf_dir if !defined($dir);
3199 my $filename = "$dir/$vmid.fw
";
3206 ipset_comments => {},
3209 my $vmfw_conf = generic_fw_config_parser($filename, $cluster_conf, $empty_conf, $rule_env);
3210 $vmfw_conf->{vmid} = $vmid;
3215 my $format_rules = sub {
3216 my ($rules, $allow_iface) = @_;
3220 foreach my $rule (@$rules) {
3221 if ($rule->{type} eq 'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
3222 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
3223 $raw .= uc($rule->{type});
3224 if ($rule->{macro}) {
3225 $raw .= " $rule->{macro}($rule->{action
})";
3227 $raw .= " " . $rule->{action};
3229 if ($allow_iface && $rule->{iface}) {
3230 $raw .= " -i
$rule->{iface
}";
3233 if ($rule->{type} ne 'group') {
3234 $raw .= " -source
$rule->{source
}" if $rule->{source};
3235 $raw .= " -dest
$rule->{dest
}" if $rule->{dest};
3236 $raw .= " -p
$rule->{proto
}" if $rule->{proto};
3237 $raw .= " -dport
$rule->{dport
}" if $rule->{dport};
3238 $raw .= " -sport
$rule->{sport
}" if $rule->{sport};
3239 $raw .= " -log $rule->{log}" if $rule->{log};
3240 $raw .= " -icmp-type
$rule->{'icmp-type'}" if defined($rule->{'icmp-type'}) && $rule->{'icmp-type'} ne '';
3243 $raw .= " # " . encode('utf8', $rule->{comment})
3244 if $rule->{comment
} && $rule->{comment
} !~ m/^\s*$/;
3247 die "unknown rule type '$rule->{type}'";
3254 my $format_options = sub {
3259 $raw .= "[OPTIONS]\n\n";
3260 foreach my $opt (keys %$options) {
3261 $raw .= "$opt: $options->{$opt}\n";
3268 my $format_aliases = sub {
3273 $raw .= "[ALIASES]\n\n";
3274 foreach my $k (keys %$aliases) {
3275 my $e = $aliases->{$k};
3276 $raw .= "$e->{name} $e->{cidr}";
3277 $raw .= " # " . encode
('utf8', $e->{comment
})
3278 if $e->{comment
} && $e->{comment
} !~ m/^\s*$/;
3286 my $format_ipsets = sub {
3291 foreach my $ipset (sort keys %{$fw_conf->{ipset
}}) {
3292 if (my $comment = $fw_conf->{ipset_comments
}->{$ipset}) {
3293 my $utf8comment = encode
('utf8', $comment);
3294 $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3296 $raw .= "[IPSET $ipset]\n\n";
3298 my $options = $fw_conf->{ipset
}->{$ipset};
3301 foreach my $entry (@$options) {
3302 my $cidr = $entry->{cidr
};
3303 if (defined($nethash->{$cidr})) {
3304 warn "ignoring duplicate ipset entry '$cidr'\n";
3308 $nethash->{$cidr} = $entry;
3311 foreach my $cidr (sort keys %$nethash) {
3312 my $entry = $nethash->{$cidr};
3313 my $line = $entry->{nomatch
} ?
'!' : '';
3314 $line .= $entry->{cidr
};
3315 $line .= " # " . encode
('utf8', $entry->{comment
})
3316 if $entry->{comment
} && $entry->{comment
} !~ m/^\s*$/;
3326 sub save_vmfw_conf
{
3327 my ($vmid, $vmfw_conf) = @_;
3331 my $options = $vmfw_conf->{options
};
3332 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3334 my $aliases = $vmfw_conf->{aliases
};
3335 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3337 $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset
};
3339 my $rules = $vmfw_conf->{rules
} || [];
3340 if ($rules && scalar(@$rules)) {
3341 $raw .= "[RULES]\n\n";
3342 $raw .= &$format_rules($rules, 1);
3346 my $filename = "$pvefw_conf_dir/$vmid.fw";
3348 mkdir $pvefw_conf_dir;
3349 PVE
::Tools
::file_set_contents
($filename, $raw);
3355 sub remove_vmfw_conf
{
3358 my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3360 unlink $vmfw_conffile;
3363 sub clone_vmfw_conf
{
3364 my ($vmid, $newid) = @_;
3366 my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3367 my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3369 lock_vmfw_conf
($newid, 10, sub {
3370 if (-f
$clonevm_conffile) {
3371 unlink $clonevm_conffile;
3373 if (-f
$sourcevm_conffile) {
3374 my $data = PVE
::Tools
::file_get_contents
($sourcevm_conffile);
3375 PVE
::Tools
::file_set_contents
($clonevm_conffile, $data);
3380 sub read_vm_firewall_configs
{
3381 my ($cluster_conf, $vmdata, $dir) = @_;
3383 my $vmfw_configs = {};
3385 foreach my $vmid (keys %{$vmdata->{qemu
}}) {
3386 my $vmfw_conf = load_vmfw_conf
($cluster_conf, 'vm', $vmid, $dir);
3387 next if !$vmfw_conf->{options
}; # skip if file does not exist
3388 $vmfw_configs->{$vmid} = $vmfw_conf;
3390 foreach my $vmid (keys %{$vmdata->{lxc
}}) {
3391 my $vmfw_conf = load_vmfw_conf
($cluster_conf, 'ct', $vmid, $dir);
3392 next if !$vmfw_conf->{options
}; # skip if file does not exist
3393 $vmfw_configs->{$vmid} = $vmfw_conf;
3396 return $vmfw_configs;
3399 sub get_option_log_level
{
3400 my ($options, $k) = @_;
3402 my $v = $options->{$k};
3403 $v = $default_log_level if !defined($v);
3405 return undef if $v eq '' || $v eq 'nolog';
3407 return $v if defined($log_level_hash->{$v});
3409 warn "unknown log level ($k = '$v')\n";
3414 sub generate_std_chains
{
3415 my ($ruleset, $options, $ipversion) = @_;
3417 my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3419 my $loglevel = get_option_log_level
($options, 'smurf_log_level');
3420 my $chain = 'PVEFW-smurflog';
3421 if ( $std_chains->{$chain} ) {
3422 foreach my $r (@{$std_chains->{$chain}}) {
3423 $r->{log} = $loglevel;
3427 # same as shorewall logflags action.
3428 $loglevel = get_option_log_level
($options, 'tcp_flags_log_level');
3429 $chain = 'PVEFW-logflags';
3430 if ( $std_chains->{$chain} ) {
3431 foreach my $r (@{$std_chains->{$chain}}) {
3432 $r->{log} = $loglevel;
3436 foreach my $chain (keys %$std_chains) {
3437 ruleset_create_chain
($ruleset, $chain);
3438 foreach my $rule (@{$std_chains->{$chain}}) {
3440 ruleset_generate_rule
($ruleset, $chain, $ipversion, $rule, 0);
3442 die "rule $rule as string - should not happen";
3448 sub generate_ipset_chains
{
3449 my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3451 foreach my $ipset (keys %{$ipsets}) {
3453 my $options = $ipsets->{$ipset};
3455 if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3456 if (my $ips = $device_ips->{$1}) {
3457 $options = [@$options, @$ips];
3463 foreach my $entry (@$options) {
3464 next if $entry->{errors
}; # skip entries with errors
3467 if ($entry->{cidr
} =~ m/^${ip_alias_pattern}$/) {
3468 ($cidr, $ver) = resolve_alias
($clusterfw_conf, $fw_conf, $entry->{cidr
});
3470 ($cidr, $ver) = parse_ip_or_cidr
($entry->{cidr
});
3472 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3474 # ip_compress_address takes an address only, no CIDR
3475 my ($addr, $prefix_len) = ($cidr =~ m
@^([^/]*)(/.*)?
$@);
3476 $cidr = lc(Net
::IP
::ip_compress_address
($addr, 6));
3477 $cidr .= $prefix_len if defined($prefix_len);
3483 $nethash->{$ver}->{$cidr} = { cidr
=> $cidr, nomatch
=> $entry->{nomatch
} };
3488 foreach my $ipversion (4, 6) {
3489 my $data = $nethash->{$ipversion};
3491 my $name = compute_ipset_chain_name
($fw_conf->{vmid
}, $ipset, $ipversion);
3493 my $hashsize = scalar(@$options);
3494 if ($hashsize <= 64) {
3497 $hashsize = round_powerof2
($hashsize);
3500 my $bucketsize = 12; # lower than the default of 14, faster but slightly more memory use
3502 my $family = $ipversion == "6" ?
"inet6" : "inet";
3504 $ipset_ruleset->{$name} = [
3505 "create $name hash:net family $family hashsize $hashsize maxelem $hashsize bucketsize $bucketsize"
3508 foreach my $cidr (sort keys %$data) {
3509 my $entry = $data->{$cidr};
3511 my $cmd = "add $name $cidr";
3512 if ($entry->{nomatch
}) {
3513 if ($feature_ipset_nomatch) {
3514 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3516 warn "ignore !$cidr - nomatch not supported by kernel\n";
3519 push @{$ipset_ruleset->{$name}}, $cmd;
3526 sub round_powerof2
{
3530 $int |= $int >> $_ foreach (1,2,4,8,16);
3534 my $set_global_log_ratelimit = sub {
3535 my $cluster_opts = shift;
3537 $global_log_ratelimit = '--limit 1/sec';
3538 if (defined(my $log_rlimit = $cluster_opts->{log_ratelimit
})) {
3539 my $ll_format = $cluster_option_properties->{log_ratelimit
}->{format
};
3540 my $limit = PVE
::JSONSchema
::parse_property_string
($ll_format, $log_rlimit);
3542 if ($limit->{enable
}) {
3543 if (my $rate = $limit->{rate
}) {
3544 $global_log_ratelimit = "--limit $rate";
3546 if (my $burst = $limit->{burst
}) {
3547 $global_log_ratelimit .= " --limit-burst $burst";
3550 $global_log_ratelimit = undef;
3555 sub lock_clusterfw_conf
{
3556 my ($timeout, $code, @param) = @_;
3558 my $res = PVE
::Cluster
::cfs_lock_firewall
("cluster", $timeout, $code, @param);
3564 sub load_clusterfw_conf
{
3565 my ($filename) = @_;
3567 $filename = $clusterfw_conf_filename if !defined($filename);
3573 group_comments
=> {},
3575 ipset_comments
=> {},
3578 my $cluster_conf = generic_fw_config_parser
($filename, $empty_conf, $empty_conf, 'cluster');
3579 $set_global_log_ratelimit->($cluster_conf->{options
});
3581 return $cluster_conf;
3584 sub save_clusterfw_conf
{
3585 my ($cluster_conf) = @_;
3589 my $options = $cluster_conf->{options
};
3590 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3592 my $aliases = $cluster_conf->{aliases
};
3593 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3595 $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset
};
3597 my $rules = $cluster_conf->{rules
};
3598 if ($rules && scalar(@$rules)) {
3599 $raw .= "[RULES]\n\n";
3600 $raw .= &$format_rules($rules, 1);
3604 if ($cluster_conf->{groups
}) {
3605 foreach my $group (sort keys %{$cluster_conf->{groups
}}) {
3606 my $rules = $cluster_conf->{groups
}->{$group};
3607 if (my $comment = $cluster_conf->{group_comments
}->{$group}) {
3608 my $utf8comment = encode
('utf8', $comment);
3609 $raw .= "[group $group] # $utf8comment\n\n";
3611 $raw .= "[group $group]\n\n";
3614 $raw .= &$format_rules($rules, 0);
3620 mkdir $pvefw_conf_dir;
3621 PVE
::Tools
::file_set_contents
($clusterfw_conf_filename, $raw);
3623 unlink $clusterfw_conf_filename;
3627 sub lock_hostfw_conf
{
3628 my ($timeout, $code, @param) = @_;
3630 my $res = PVE
::Cluster
::cfs_lock_firewall
("host-$nodename", $timeout, $code, @param);
3636 sub load_hostfw_conf
{
3637 my ($cluster_conf, $filename) = @_;
3639 $filename = $hostfw_conf_filename if !defined($filename);
3641 my $empty_conf = { rules
=> [], options
=> {}};
3642 return generic_fw_config_parser
($filename, $cluster_conf, $empty_conf, 'host');
3645 sub save_hostfw_conf
{
3646 my ($hostfw_conf) = @_;
3650 my $options = $hostfw_conf->{options
};
3651 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3653 my $rules = $hostfw_conf->{rules
};
3654 if ($rules && scalar(@$rules)) {
3655 $raw .= "[RULES]\n\n";
3656 $raw .= &$format_rules($rules, 1);
3661 PVE
::Tools
::file_set_contents
($hostfw_conf_filename, $raw);
3663 unlink $hostfw_conf_filename;
3668 my ($cluster_conf, $hostfw_conf, $vmdata, $corosync_conf) = @_;
3672 # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3673 $pve_std_chains = dclone
($pve_std_chains_conf);
3675 if ($vmdata) { # test mode
3676 my $testdir = $vmdata->{testdir
} || die "no test directory specified";
3677 my $filename = "$testdir/cluster.fw";
3678 $cluster_conf = load_clusterfw_conf
($filename);
3680 $filename = "$testdir/host.fw";
3681 $hostfw_conf = load_hostfw_conf
($cluster_conf, $filename);
3683 $vmfw_configs = read_vm_firewall_configs
($cluster_conf, $vmdata, $testdir);
3684 } else { # normal operation
3685 $cluster_conf = load_clusterfw_conf
(undef) if !$cluster_conf;
3687 $hostfw_conf = load_hostfw_conf
($cluster_conf, undef) if !$hostfw_conf;
3689 # cfs_update is handled by daemon or API
3690 $corosync_conf = PVE
::Cluster
::cfs_read_file
("corosync.conf")
3691 if !defined($corosync_conf) && PVE
::Corosync
::check_conf_exists
(1);
3693 $vmdata = read_local_vm_config
();
3694 $vmfw_configs = read_vm_firewall_configs
($cluster_conf, $vmdata, undef);
3697 return ({},{},{},{}) if !$cluster_conf->{options
}->{enable
};
3700 if ($cluster_conf->{aliases
}->{local_network
}) {
3701 $localnet = $cluster_conf->{aliases
}->{local_network
}->{cidr
};
3704 ($localnet, $localnet_ver) = parse_ip_or_cidr
(local_network
() || '127.0.0.0/8');
3706 $cluster_conf->{aliases
}->{local_network
} = {
3707 name
=> 'local_network', cidr
=> $localnet, ipversion
=> $localnet_ver };
3710 push @{$cluster_conf->{ipset
}->{management
}}, { cidr
=> $localnet };
3714 $ruleset->{filter
} = compile_iptables_filter
($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3715 $ruleset->{raw
} = compile_iptables_raw
($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3716 $rulesetv6->{filter
} = compile_iptables_filter
($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
3717 $rulesetv6->{raw
} = compile_iptables_raw
($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
3718 my $ebtables_ruleset = compile_ebtables_filter
($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata);
3719 my $ipset_ruleset = compile_ipsets
($cluster_conf, $vmfw_configs, $vmdata);
3721 return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
3724 sub compile_iptables_raw
{
3725 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
3729 my $hostfw_options = $hostfw_conf->{options
} || {};
3730 my $protection_synflood = $hostfw_options->{protection_synflood
} || 0;
3732 if($protection_synflood) {
3734 my $protection_synflood_rate = $hostfw_options->{protection_synflood_rate
} ?
$hostfw_options->{protection_synflood_rate
} : 200;
3735 my $protection_synflood_burst = $hostfw_options->{protection_synflood_burst
} ?
$hostfw_options->{protection_synflood_burst
} : 1000;
3736 my $protection_synflood_limit = $hostfw_options->{protection_synflood_limit
} ?
$hostfw_options->{protection_synflood_limit
} : 3000;
3737 my $protection_synflood_expire = $hostfw_options->{nf_conntrack_tcp_timeout_syn_recv
} ?
$hostfw_options->{nf_conntrack_tcp_timeout_syn_recv
} : 60;
3738 $protection_synflood_expire = $protection_synflood_expire * 1000;
3739 my $protection_synflood_mask = $ipversion == 4 ?
32 : 64;
3741 ruleset_create_chain
($ruleset, "PVEFW-PREROUTING");
3742 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 $protection_synflood_expire", "-j DROP");
3748 sub compile_iptables_filter
{
3749 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
3753 ruleset_create_chain
($ruleset, "PVEFW-INPUT");
3754 ruleset_create_chain
($ruleset, "PVEFW-OUTPUT");
3756 ruleset_create_chain
($ruleset, "PVEFW-FORWARD");
3758 my $hostfw_options = $hostfw_conf->{options
} || {};
3760 # fixme: what log level should we use here?
3761 my $loglevel = get_option_log_level
($hostfw_options, "log_level_out");
3763 my $conn_allow_invalid = $hostfw_options->{nf_conntrack_allow_invalid
} // 0;
3764 ruleset_chain_add_conn_filters
($ruleset, "PVEFW-FORWARD", $conn_allow_invalid, "ACCEPT");
3766 ruleset_create_chain
($ruleset, "PVEFW-FWBR-IN");
3767 ruleset_chain_add_input_filters
($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3769 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3771 ruleset_create_chain
($ruleset, "PVEFW-FWBR-OUT");
3772 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3774 generate_std_chains
($ruleset, $hostfw_options, $ipversion);
3776 my $hostfw_enable = !(defined($hostfw_options->{enable
}) && ($hostfw_options->{enable
} == 0));
3778 if ($hostfw_enable) {
3779 eval { enable_host_firewall
($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf); };
3780 warn $@ if $@; # just to be sure - should not happen
3783 # generate firewall rules for QEMU VMs
3784 foreach my $vmid (sort keys %{$vmdata->{qemu
}}) {
3786 my $conf = $vmdata->{qemu
}->{$vmid};
3787 my $vmfw_conf = $vmfw_configs->{$vmid};
3788 return if !$vmfw_conf || !$vmfw_conf->{options
}->{enable
};
3790 foreach my $netid (sort keys %$conf) {
3791 next if $netid !~ m/^net(\d+)$/;
3792 my $net = PVE
::QemuServer
::parse_net
($conf->{$netid});
3793 next if !$net->{firewall
};
3795 my $iface = "tap${vmid}i$1";
3796 my $macaddr = $net->{macaddr
};
3797 generate_tap_rules_direction
($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3798 $vmfw_conf, $vmid, 'IN', $ipversion);
3799 generate_tap_rules_direction
($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3800 $vmfw_conf, $vmid, 'OUT', $ipversion);
3803 warn $@ if $@; # just to be sure - should not happen
3806 # generate firewall rules for LXC containers
3807 foreach my $vmid (sort keys %{$vmdata->{lxc
}}) {
3809 my $conf = $vmdata->{lxc
}->{$vmid};
3810 my $vmfw_conf = $vmfw_configs->{$vmid};
3811 return if !$vmfw_conf || !$vmfw_conf->{options
}->{enable
};
3813 foreach my $netid (sort keys %$conf) {
3814 next if $netid !~ m/^net(\d+)$/;
3815 my $net = PVE
::LXC
::Config-
>parse_lxc_network($conf->{$netid});
3816 next if !$net->{firewall
};
3818 my $iface = "veth${vmid}i$1";
3819 my $macaddr = $net->{hwaddr
};
3820 generate_tap_rules_direction
($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3821 $vmfw_conf, $vmid, 'IN', $ipversion);
3822 generate_tap_rules_direction
($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3823 $vmfw_conf, $vmid, 'OUT', $ipversion);
3826 warn $@ if $@; # just to be sure - should not happen
3829 if (ruleset_chain_exist
($ruleset, "PVEFW-IPS")){
3830 ruleset_insertrule
($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3836 sub mac_to_linklocal
{
3838 my @parts = split(/:/, $macaddr);
3839 # The standard link local address uses the fe80::/64 prefix with the
3840 # modified EUI-64 identifier derived from the MAC address by flipping the
3841 # universal/local bit and inserting FF:FE in the middle.
3843 $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3844 my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3845 return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3848 sub compile_ipsets
{
3849 my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3852 if ($cluster_conf->{aliases
}->{local_network
}) {
3853 $localnet = $cluster_conf->{aliases
}->{local_network
}->{cidr
};
3856 ($localnet, $localnet_ver) = parse_ip_or_cidr
(local_network
() || '127.0.0.0/8');
3858 $cluster_conf->{aliases
}->{local_network
} = {
3859 name
=> 'local_network', cidr
=> $localnet, ipversion
=> $localnet_ver };
3862 push @{$cluster_conf->{ipset
}->{management
}}, { cidr
=> $localnet };
3865 my $ipset_ruleset = {};
3867 # generate ipsets for QEMU VMs
3868 foreach my $vmid (keys %{$vmdata->{qemu
}}) {
3870 my $conf = $vmdata->{qemu
}->{$vmid};
3871 my $vmfw_conf = $vmfw_configs->{$vmid};
3872 return if !$vmfw_conf;
3874 # When the 'ipfilter' option is enabled every device for which there
3875 # is no 'ipfilter-netX' ipset defined gets an implicit empty default
3877 # The reason is that ipfilter ipsets are always filled with standard
3878 # IPv6 link-local filters.
3879 my $ipsets = $vmfw_conf->{ipset
};
3880 my $implicit_sets = {};
3882 my $device_ips = {};
3883 foreach my $netid (keys %$conf) {
3884 next if $netid !~ m/^net(\d+)$/;
3885 my $net = PVE
::QemuServer
::parse_net
($conf->{$netid});
3886 next if !$net->{firewall
};
3888 if ($vmfw_conf->{options
}->{ipfilter
} && !$ipsets->{"ipfilter-$netid"}) {
3889 $implicit_sets->{"ipfilter-$netid"} = [];
3892 my $macaddr = $net->{macaddr
};
3893 my $linklocal = mac_to_linklocal
($macaddr);
3894 $device_ips->{$netid} = [
3895 { cidr
=> $linklocal },
3896 { cidr
=> 'fe80::/10', nomatch
=> 1 }
3900 generate_ipset_chains
($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3901 generate_ipset_chains
($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3903 warn $@ if $@; # just to be sure - should not happen
3906 # generate firewall rules for LXC containers
3907 foreach my $vmid (keys %{$vmdata->{lxc
}}) {
3909 my $conf = $vmdata->{lxc
}->{$vmid};
3910 my $vmfw_conf = $vmfw_configs->{$vmid};
3911 return if !$vmfw_conf;
3913 # When the 'ipfilter' option is enabled every device for which there
3914 # is no 'ipfilter-netX' ipset defined gets an implicit empty default
3916 # The reason is that ipfilter ipsets are always filled with standard
3917 # IPv6 link-local filters, as well as the IP addresses configured
3918 # for the container.
3919 my $ipsets = $vmfw_conf->{ipset
};
3920 my $implicit_sets = {};
3922 my $device_ips = {};
3923 foreach my $netid (keys %$conf) {
3924 next if $netid !~ m/^net(\d+)$/;
3925 my $net = PVE
::LXC
::Config-
>parse_lxc_network($conf->{$netid});
3926 next if !$net->{firewall
};
3928 if ($vmfw_conf->{options
}->{ipfilter
} && !$ipsets->{"ipfilter-$netid"}) {
3929 $implicit_sets->{"ipfilter-$netid"} = [];
3932 my $macaddr = $net->{hwaddr
};
3933 my $linklocal = mac_to_linklocal
($macaddr);
3934 my $set = $device_ips->{$netid} = [
3935 { cidr
=> $linklocal },
3936 { cidr
=> 'fe80::/10', nomatch
=> 1 }
3938 if (defined($net->{ip
}) && $net->{ip
} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3939 push @$set, { cidr
=> $1 };
3941 if (defined($net->{ip6
}) && $net->{ip6
} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3942 push @$set, { cidr
=> $1 };
3946 generate_ipset_chains
($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3947 generate_ipset_chains
($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3949 warn $@ if $@; # just to be sure - should not happen
3952 generate_ipset_chains
($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset
});
3954 return $ipset_ruleset;
3957 sub compile_ebtables_filter
{
3958 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata) = @_;
3960 if (!($cluster_conf->{options
}->{ebtables
} // 1)) {
3966 ruleset_create_chain
($ruleset, "PVEFW-FORWARD");
3968 ruleset_create_chain
($ruleset, "PVEFW-FWBR-OUT");
3969 #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED', to speedup rules
3970 ruleset_addrule
($ruleset, 'PVEFW-FORWARD', '-p IPv4', '-j ACCEPT');
3971 ruleset_addrule
($ruleset, 'PVEFW-FORWARD', '-p IPv6', '-j ACCEPT');
3972 ruleset_addrule
($ruleset, 'PVEFW-FORWARD', '-o fwln+', '-j PVEFW-FWBR-OUT');
3974 # generate firewall rules for QEMU VMs
3975 foreach my $vmid (sort keys %{$vmdata->{qemu
}}) {
3977 my $conf = $vmdata->{qemu
}->{$vmid};
3978 my $vmfw_conf = $vmfw_configs->{$vmid};
3979 return if !$vmfw_conf || !$vmfw_conf->{options
}->{enable
};
3980 my $ipsets = $vmfw_conf->{ipset
};
3982 foreach my $netid (sort keys %$conf) {
3983 next if $netid !~ m/^net(\d+)$/;
3984 my $net = PVE
::QemuServer
::parse_net
($conf->{$netid});
3985 next if !$net->{firewall
};
3986 my $iface = "tap${vmid}i$1";
3987 my $macaddr = $net->{macaddr
};
3989 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3990 foreach my $ipaddr (@$ipset) {
3991 my($ip, $version) = parse_ip_or_cidr
($ipaddr->{cidr
});
3992 next if !$ip || ($version && $version != 4);
3993 push(@$arpfilter, $ip);
3996 generate_tap_layer2filter
($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3999 warn $@ if $@; # just to be sure - should not happen
4002 # generate firewall rules for LXC containers
4003 foreach my $vmid (sort keys %{$vmdata->{lxc
}}) {
4005 my $conf = $vmdata->{lxc
}->{$vmid};
4007 my $vmfw_conf = $vmfw_configs->{$vmid};
4008 return if !$vmfw_conf || !$vmfw_conf->{options
}->{enable
};
4009 my $ipsets = $vmfw_conf->{ipset
};
4011 foreach my $netid (sort keys %$conf) {
4012 next if $netid !~ m/^net(\d+)$/;
4013 my $net = PVE
::LXC
::Config-
>parse_lxc_network($conf->{$netid});
4014 next if !$net->{firewall
};
4015 my $iface = "veth${vmid}i$1";
4016 my $macaddr = $net->{hwaddr
};
4018 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
4019 foreach my $ipaddr (@$ipset) {
4020 my($ip, $version) = parse_ip_or_cidr
($ipaddr->{cidr
});
4021 next if !$ip || ($version && $version != 4);
4022 push(@$arpfilter, $ip);
4025 if (defined(my $ip = $net->{ip
}) && $vmfw_conf->{options
}->{ipfilter
}) {
4026 # ebtables changes this to a .0/MASK network but we just
4027 # want the address here, no network - see #2193
4029 if ($ip ne 'dhcp') {
4030 push @$arpfilter, $ip;
4033 generate_tap_layer2filter
($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
4036 warn $@ if $@; # just to be sure - should not happen
4042 sub generate_tap_layer2filter
{
4043 my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter) = @_;
4044 my $options = $vmfw_conf->{options
};
4046 my $tapchain = $iface."-OUT";
4048 # ebtables remove zeros from mac pairs
4049 $macaddr =~ s/0([0-9a-f])/$1/ig;
4050 $macaddr = lc($macaddr);
4052 ruleset_create_chain
($ruleset, $tapchain);
4054 if (defined($macaddr) && !(defined($options->{macfilter
}) && $options->{macfilter
} == 0)) {
4055 ruleset_addrule
($ruleset, $tapchain, "-s ! $macaddr", '-j DROP');
4059 my $arpchain = $tapchain."-ARP";
4060 ruleset_addrule
($ruleset, $tapchain, "-p ARP", "-j $arpchain");
4061 ruleset_create_chain
($ruleset, $arpchain);
4063 foreach my $ip (@{$arpfilter}) {
4064 ruleset_addrule
($ruleset, $arpchain, "-p ARP --arp-ip-src $ip", '-j RETURN');
4066 ruleset_addrule
($ruleset, $arpchain, '', '-j DROP');
4069 if (defined($options->{layer2_protocols
})){
4070 my $protochain = $tapchain."-PROTO";
4071 ruleset_addrule
($ruleset, $tapchain, '', "-j $protochain");
4072 ruleset_create_chain
($ruleset, $protochain);
4074 foreach my $proto (split(/,/, $options->{layer2_protocols
})) {
4075 ruleset_addrule
($ruleset, $protochain, "-p $proto", '-j RETURN');
4077 ruleset_addrule
($ruleset, $protochain, '', '-j DROP');
4080 ruleset_addrule
($ruleset, $tapchain, '', '-j ACCEPT');
4082 ruleset_addrule
($ruleset, 'PVEFW-FWBR-OUT', "-i $iface", "-j $tapchain");
4085 # the parameter $change_only_regex changes two things if defined:
4086 # * all chains not matching it will be left intact
4087 # * both the $active_chains hash and the returned status_hash have different
4088 # structure (they contain a key named 'rules').
4089 sub get_ruleset_status
{
4090 my ($ruleset, $active_chains, $digest_fn, $change_only_regex) = @_;
4092 my $statushash = {};
4094 foreach my $chain (sort keys %$ruleset) {
4095 my $rules = $ruleset->{$chain};
4096 my $sig = &$digest_fn($rules);
4099 $statushash->{$chain}->{sig
} = $sig;
4100 if (defined($change_only_regex)) {
4101 $oldsig = $active_chains->{$chain}->{sig
};
4102 $statushash->{$chain}->{rules
} = $rules;
4104 $oldsig = $active_chains->{$chain};
4106 if (!defined($oldsig)) {
4107 $statushash->{$chain}->{action
} = 'create';
4109 if ($oldsig eq $sig) {
4110 $statushash->{$chain}->{action
} = 'exists';
4112 $statushash->{$chain}->{action
} = 'update';
4116 print "$statushash->{$chain}->{action} $chain ($sig)\n";
4117 foreach my $cmd (@{$rules}) {
4123 foreach my $chain (sort keys %$active_chains) {
4124 next if defined($ruleset->{$chain});
4125 my $action = 'delete';
4126 my $sig = $active_chains->{$chain};
4127 if (defined($change_only_regex)) {
4128 $action = 'ignore' if ($chain !~ m/$change_only_regex/);
4129 $statushash->{$chain}->{rules
} = $active_chains->{$chain}->{rules
};
4130 $statushash->{$chain}->{policy
} = $active_chains->{$chain}->{policy
};
4133 $statushash->{$chain}->{action
} = $action;
4134 $statushash->{$chain}->{sig
} = $sig;
4135 print "$action $chain ($sig)\n" if $verbose;
4141 sub print_sig_rule
{
4142 my ($chain, $sig) = @_;
4144 # We just use this to store a SHA1 checksum used to detect changes
4145 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
4148 sub get_ruleset_cmdlist {
4149 my ($ruleset, $iptablescmd, $table) = @_;
4151 $table = 'filter' if !$table;
4153 my $cmdlist = "*$table\n"; # we pass this to iptables-restore;
4155 my ($active_chains, $hooks) = iptables_get_chains($iptablescmd, $table);
4156 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
4158 # create missing chains first
4159 foreach my $chain (sort keys %$ruleset) {
4160 my $stat = $statushash->{$chain};
4161 die "internal error
" if !$stat;
4162 next if $stat->{action} ne 'create';
4164 $cmdlist .= ":$chain - [0:0]\n";
4167 foreach my $h (qw(INPUT OUTPUT FORWARD PREROUTING)) {
4168 my $chain = "PVEFW-$h";
4169 if ($ruleset->{$chain} && !$hooks->{$h}) {
4170 $cmdlist .= "-A $h -j $chain\n";
4174 foreach my $chain (sort keys %$ruleset) {
4175 my $stat = $statushash->{$chain};
4176 die "internal error" if !$stat;
4178 if ($stat->{action
} eq 'update' || $stat->{action
} eq 'create') {
4179 $cmdlist .= "-F $chain\n";
4180 foreach my $cmd (@{$ruleset->{$chain}}) {
4181 $cmdlist .= "$cmd\n";
4183 $cmdlist .= print_sig_rule
($chain, $stat->{sig
});
4184 } elsif ($stat->{action
} eq 'delete') {
4185 die "internal error"; # this should not happen
4186 } elsif ($stat->{action
} eq 'exists') {
4189 die "internal error - unknown status '$stat->{action}'";
4193 foreach my $chain (keys %$statushash) {
4194 next if $statushash->{$chain}->{action
} ne 'delete';
4195 $cmdlist .= "-F $chain\n";
4197 foreach my $chain (keys %$statushash) {
4198 next if $statushash->{$chain}->{action
} ne 'delete';
4199 next if $chain eq 'PVEFW-INPUT';
4200 next if $chain eq 'PVEFW-OUTPUT';
4201 next if $chain eq 'PVEFW-FORWARD';
4202 next if $chain eq 'PVEFW-PREROUTING';
4203 $cmdlist .= "-X $chain\n";
4206 my $changes = $cmdlist ne "*$table\n" ?
1 : 0;
4208 $cmdlist .= "COMMIT\n";
4210 return wantarray ?
($cmdlist, $changes) : $cmdlist;
4213 my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tap|veth)\d+i\d+-(?:IN|OUT)/;
4215 sub get_ebtables_cmdlist
{
4219 my $cmdlist = "*filter\n";
4221 my $active_chains = ebtables_get_chains
();
4222 my $statushash = get_ruleset_status
($ruleset, $active_chains,
4223 \
&iptables_chain_digest
,
4224 $pve_ebtables_chainname_regex);
4226 # create chains first and make sure PVE rules are evaluated if active
4227 my $append_pve_to_forward = '-A FORWARD -j PVEFW-FORWARD';
4228 my $pve_include = 0;
4229 foreach my $chain (sort keys %$statushash) {
4230 next if ($statushash->{$chain}->{action
} eq 'delete');
4231 my $policy = $statushash->{$chain}->{policy
} // 'ACCEPT';
4232 $cmdlist .= ":$chain $policy\n";
4233 $pve_include = 1 if ($chain eq 'PVEFW-FORWARD');
4236 foreach my $chain (sort keys %$statushash) {
4237 my $stat = $statushash->{$chain};
4238 $changes = 1 if ($stat->{action
} !~ 'ignore|exists');
4239 next if ($stat->{action
} eq 'delete');
4241 foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
4242 if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
4243 next if ! $pve_include;
4246 $cmdlist .= "$cmd\n";
4249 $cmdlist .= "$append_pve_to_forward\n" if $pve_include;
4251 return wantarray ?
($cmdlist, $changes) : $cmdlist;
4254 sub get_ipset_cmdlist
{
4259 my $delete_cmdlist = "";
4261 my $active_chains = ipset_get_chains
();
4262 my $statushash = get_ruleset_status
($ruleset, $active_chains, \
&ipset_chain_digest
);
4264 # remove stale _swap chains
4265 foreach my $chain (keys %$active_chains) {
4266 if ($chain =~ m/^PVEFW-\S+_swap$/) {
4267 $cmdlist .= "destroy $chain\n";
4271 foreach my $chain (keys %$ruleset) {
4272 my $stat = $statushash->{$chain};
4273 die "internal error" if !$stat;
4275 if ($stat->{action
} eq 'create') {
4276 foreach my $cmd (@{$ruleset->{$chain}}) {
4277 $cmdlist .= "$cmd\n";
4282 foreach my $chain (keys %$ruleset) {
4283 my $stat = $statushash->{$chain};
4284 die "internal error" if !$stat;
4286 if ($stat->{action
} eq 'update') {
4287 my $chain_swap = $chain."_swap";
4289 foreach my $cmd (@{$ruleset->{$chain}}) {
4290 $cmd =~ s/$chain/$chain_swap/;
4291 $cmdlist .= "$cmd\n";
4293 $cmdlist .= "swap $chain_swap $chain\n";
4294 $cmdlist .= "flush $chain_swap\n";
4295 $cmdlist .= "destroy $chain_swap\n";
4299 # the remove unused chains
4300 foreach my $chain (keys %$statushash) {
4301 next if $statushash->{$chain}->{action
} ne 'delete';
4303 $delete_cmdlist .= "flush $chain\n";
4304 $delete_cmdlist .= "destroy $chain\n";
4307 my $changes = ($cmdlist || $delete_cmdlist) ?
1 : 0;
4309 return ($cmdlist, $delete_cmdlist, $changes);
4313 my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = @_;
4315 enable_bridge_firewall
();
4317 my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
4318 get_ipset_cmdlist
($ipset_ruleset);
4320 my ($cmdlist, $changes) = get_ruleset_cmdlist
($ruleset->{filter
});
4321 my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist
($rulesetv6->{filter
}, "ip6tables");
4322 my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist
($ebtables_ruleset);
4323 my ($cmdlist_raw, $changes_raw) = get_ruleset_cmdlist
($ruleset->{raw
}, undef, 'raw');
4324 my ($cmdlistv6_raw, $changesv6_raw) = get_ruleset_cmdlist
($rulesetv6->{raw
}, "ip6tables", 'raw');
4327 if ($ipset_changes) {
4328 print "ipset changes:\n";
4329 print $ipset_create_cmdlist if $ipset_create_cmdlist;
4330 print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
4334 print "iptables changes:\n";
4339 print "ip6tables changes:\n";
4344 print "iptables table raw changes:\n";
4348 if ($changesv6_raw) {
4349 print "ip6tables table raw changes:\n";
4350 print $cmdlistv6_raw;
4353 if ($ebtables_changes) {
4354 print "ebtables changes:\n";
4355 print $ebtables_cmdlist;
4359 my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
4360 PVE
::Tools
::file_set_contents
($tmpfile, $ipset_create_cmdlist || '');
4362 ipset_restore_cmdlist
($ipset_create_cmdlist);
4364 $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
4365 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlist || '');
4367 iptables_restore_cmdlist
($cmdlist);
4369 $tmpfile = "$pve_fw_status_dir/ip4cmdlistraw";
4370 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlist_raw || '');
4372 iptables_restore_cmdlist
($cmdlist_raw, 'raw');
4374 $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
4375 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlistv6 || '');
4377 ip6tables_restore_cmdlist
($cmdlistv6);
4379 $tmpfile = "$pve_fw_status_dir/ip6cmdlistraw";
4380 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlistv6_raw || '');
4382 ip6tables_restore_cmdlist
($cmdlistv6_raw, 'raw');
4384 $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
4385 PVE
::Tools
::file_set_contents
($tmpfile, $ipset_delete_cmdlist || '');
4387 ipset_restore_cmdlist
($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
4389 ebtables_restore_cmdlist
($ebtables_cmdlist);
4391 $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
4392 PVE
::Tools
::file_set_contents
($tmpfile, $ebtables_cmdlist || '');
4394 # test: re-read status and check if everything is up to date
4395 my $ruleset_filter = $ruleset->{filter
};
4396 my $active_chains = iptables_get_chains
();
4397 my $statushash = get_ruleset_status
($ruleset_filter, $active_chains, \
&iptables_chain_digest
);
4400 foreach my $chain (sort keys %$ruleset_filter) {
4401 my $stat = $statushash->{$chain};
4402 if ($stat->{action
} ne 'exists') {
4403 warn "unable to update chain '$chain'\n";
4408 my $rulesetv6_filter = $rulesetv6->{filter
};
4409 my $active_chainsv6 = iptables_get_chains
("ip6tables");
4410 my $statushashv6 = get_ruleset_status
($rulesetv6_filter, $active_chainsv6, \
&iptables_chain_digest
);
4412 foreach my $chain (sort keys %$rulesetv6_filter) {
4413 my $stat = $statushashv6->{$chain};
4414 if ($stat->{action
} ne 'exists') {
4415 warn "unable to update chain '$chain'\n";
4420 my $ruleset_raw = $ruleset->{raw
};
4421 my $active_chains_raw = iptables_get_chains
(undef, 'raw');
4422 my $statushash_raw = get_ruleset_status
($ruleset_raw, $active_chains_raw, \
&iptables_chain_digest
);
4424 foreach my $chain (sort keys %$ruleset_raw) {
4425 my $stat = $statushash_raw->{$chain};
4426 if ($stat->{action
} ne 'exists') {
4427 warn "unable to update chain '$chain'\n";
4432 my $rulesetv6_raw = $rulesetv6->{raw
};
4433 my $active_chainsv6_raw = iptables_get_chains
("ip6tables", 'raw');
4434 my $statushashv6_raw = get_ruleset_status
($rulesetv6_raw, $active_chainsv6_raw, \
&iptables_chain_digest
);
4436 foreach my $chain (sort keys %$rulesetv6_raw) {
4437 my $stat = $statushashv6_raw->{$chain};
4438 if ($stat->{action
} ne 'exists') {
4439 warn "unable to update chain '$chain'\n";
4444 my $active_ebtables_chains = ebtables_get_chains
();
4445 my $ebtables_statushash = get_ruleset_status
($ebtables_ruleset,
4446 $active_ebtables_chains, \
&iptables_chain_digest
,
4447 $pve_ebtables_chainname_regex);
4449 foreach my $chain (sort keys %$ebtables_ruleset) {
4450 my $stat = $ebtables_statushash->{$chain};
4451 if ($stat->{action
} ne 'exists') {
4452 warn "ebtables : unable to update chain '$chain'\n";
4457 die "unable to apply firewall changes\n" if $errors;
4459 update_nf_conntrack_max
($hostfw_conf);
4461 update_nf_conntrack_tcp_timeout_established
($hostfw_conf);
4463 update_nf_conntrack_tcp_timeout_syn_recv
($hostfw_conf);
4465 update_nf_conntrack_logging
($hostfw_conf);
4468 sub update_nf_conntrack_max
{
4469 my ($hostfw_conf) = @_;
4471 my $max = 262144; # reasonable default (2^16 * 4), see nf_conntrack-sysctl docs
4473 my $options = $hostfw_conf->{options
} || {};
4475 if (defined($options->{nf_conntrack_max
}) && ($options->{nf_conntrack_max
} > $max)) {
4476 $max = $options->{nf_conntrack_max
};
4477 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
4480 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
4481 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
4483 my $current = int(PVE
::Tools
::file_read_firstline
($filename_nf_conntrack_max) || $max);
4485 if ($current != $max) {
4486 my $hashsize = int($max/4);
4487 PVE
::ProcFSTools
::write_proc_entry
($filename_hashsize, $hashsize);
4488 PVE
::ProcFSTools
::write_proc_entry
($filename_nf_conntrack_max, $max);
4492 sub update_nf_conntrack_tcp_timeout_established
{
4493 my ($hostfw_conf) = @_;
4495 my $options = $hostfw_conf->{options
} || {};
4497 my $value = defined($options->{nf_conntrack_tcp_timeout_established
}) ?
$options->{nf_conntrack_tcp_timeout_established
} : 432000;
4499 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
4502 sub update_nf_conntrack_tcp_timeout_syn_recv
{
4503 my ($hostfw_conf) = @_;
4505 my $options = $hostfw_conf->{options
} || {};
4507 my $value = defined($options->{nf_conntrack_tcp_timeout_syn_recv
}) ?
$options->{nf_conntrack_tcp_timeout_syn_recev
} : 60;
4509 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_syn_recv", $value);
4512 my $log_nf_conntrack_enabled = undef;
4513 sub update_nf_conntrack_logging
{
4514 my ($hostfw_conf) = @_;
4516 my $options = $hostfw_conf->{options
} || {};
4517 my $value = $options->{log_nf_conntrack
} || 0;
4518 if (!defined($log_nf_conntrack_enabled)
4519 || $value != $log_nf_conntrack_enabled)
4521 my $tmpfile = "$pve_fw_status_dir/log_nf_conntrack";
4522 PVE
::Tools
::file_set_contents
($tmpfile, $value);
4524 run_command
([qw(systemctl try-reload-or-restart pvefw-logger.service)]);
4525 $log_nf_conntrack_enabled = $value;
4529 sub remove_pvefw_chains
{
4531 PVE
::Firewall
::remove_pvefw_chains_iptables
("iptables");
4532 PVE
::Firewall
::remove_pvefw_chains_iptables
("ip6tables");
4533 PVE
::Firewall
::remove_pvefw_chains_iptables
("iptables", "raw");
4534 PVE
::Firewall
::remove_pvefw_chains_iptables
("ip6tables", "raw");
4535 PVE
::Firewall
::remove_pvefw_chains_ipset
();
4536 PVE
::Firewall
::remove_pvefw_chains_ebtables
();
4540 sub remove_pvefw_chains_iptables
{
4541 my ($iptablescmd, $table) = @_;
4543 $table = 'filter' if !$table;
4545 my ($chash, $hooks) = iptables_get_chains
($iptablescmd, $table);
4546 my $cmdlist = "*$table\n";
4548 foreach my $h (qw(INPUT OUTPUT FORWARD PREROUTING)) {
4550 $cmdlist .= "-D $h -j PVEFW-$h\n";
4554 foreach my $chain (keys %$chash) {
4555 $cmdlist .= "-F $chain\n";
4558 foreach my $chain (keys %$chash) {
4559 $cmdlist .= "-X $chain\n";
4561 $cmdlist .= "COMMIT\n";
4563 if($iptablescmd eq "ip6tables") {
4564 ip6tables_restore_cmdlist
($cmdlist, $table);
4566 iptables_restore_cmdlist
($cmdlist, $table);
4570 sub remove_pvefw_chains_ipset
{
4572 my $ipset_chains = ipset_get_chains
();
4576 foreach my $chain (keys %$ipset_chains) {
4577 $cmdlist .= "flush $chain\n";
4578 $cmdlist .= "destroy $chain\n";
4581 ipset_restore_cmdlist
($cmdlist) if $cmdlist;
4584 sub remove_pvefw_chains_ebtables
{
4585 # apply empty ruleset = remove all our chains
4586 ebtables_restore_cmdlist
(get_ebtables_cmdlist
({}));
4590 my $cluster_conf = load_clusterfw_conf
();
4591 my $cluster_options = $cluster_conf->{options
};
4592 my $enable = $cluster_options->{enable
};
4596 # load required modules here
4602 my $cluster_conf = load_clusterfw_conf
();
4603 my $cluster_options = $cluster_conf->{options
};
4605 if (!$cluster_options->{enable
}) {
4606 PVE
::Firewall
::remove_pvefw_chains
();
4610 my $hostfw_conf = load_hostfw_conf
($cluster_conf);
4612 my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile
($cluster_conf, $hostfw_conf);
4614 apply_ruleset
($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);