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 use PVE
::Firewall
::Helpers
;
29 my $pvefw_conf_dir = "/etc/pve/firewall";
30 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
32 # dynamically include PVE::QemuServer and PVE::LXC
33 # to avoid dependency problems
36 require PVE
::QemuServer
;
37 require PVE
::QemuConfig
;
38 $have_qemu_server = 1;
47 my $pve_fw_status_dir = "/var/lib/pve-firewall";
49 mkdir $pve_fw_status_dir; # make sure this exists
51 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
52 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
53 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
55 my $max_alias_name_length = 64;
56 my $max_ipset_name_length = 64;
57 my $max_group_name_length = 18;
59 my $PROTOCOLS_WITH_PORTS = {
61 udplite
=> 1, 136 => 1,
67 PVE
::JSONSchema
::register_format
('IPorCIDR', \
&pve_verify_ip_or_cidr
);
68 sub pve_verify_ip_or_cidr
{
69 my ($cidr, $noerr) = @_;
71 if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
72 return $cidr if Net
::IP-
>new($cidr);
73 return undef if $noerr;
74 die Net
::IP
::Error
() . "\n";
76 return undef if $noerr;
77 die "value does not look like a valid IP address or CIDR network\n";
80 PVE
::JSONSchema
::register_format
('IPorCIDRorAlias', \
&pve_verify_ip_or_cidr_or_alias
);
81 sub pve_verify_ip_or_cidr_or_alias
{
82 my ($cidr, $noerr) = @_;
84 return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
86 return pve_verify_ip_or_cidr
($cidr, $noerr);
89 PVE
::JSONSchema
::register_standard_option
('ipset-name', {
90 description
=> "IP set name.",
92 pattern
=> $ipset_name_pattern,
94 maxLength
=> $max_ipset_name_length,
97 PVE
::JSONSchema
::register_standard_option
('pve-fw-alias', {
98 description
=> "Alias name.",
100 pattern
=> $ip_alias_pattern,
102 maxLength
=> $max_alias_name_length,
105 PVE
::JSONSchema
::register_standard_option
('pve-fw-loglevel' => {
106 description
=> "Log level.",
108 enum
=> ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
112 PVE
::JSONSchema
::register_standard_option
('pve-security-group-name', {
113 description
=> "Security Group name.",
115 pattern
=> $security_group_name_pattern,
117 maxLength
=> $max_group_name_length,
120 my $feature_ipset_nomatch = 0;
122 my (undef, undef, $release) = POSIX
::uname
();
123 if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
124 my ($major, $minor) = ($1, $2);
125 $feature_ipset_nomatch = 1 if ($major > 3) ||
126 ($major == 3 && $minor >= 7);
131 my $nodename = PVE
::INotify
::nodename
();
132 my $hostfw_conf_filename = "/etc/pve/nodes/$nodename/host.fw";
134 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
136 my $default_log_level = 'nolog'; # avoid logs by default
137 my $global_log_ratelimit = '--limit 1/sec';
139 my $log_level_hash = {
161 # sport => port[,port[,port]].. or port:port
162 # dport => port[,port[,port]].. or port:port
163 # log => optional, loglevel
164 # logmsg => optional, logmsg - overwrites default
165 # iface_in => incomin interface
166 # iface_out => outgoing interface
167 # match => optional, overwrites generation of match
168 # target => optional, overwrites action
170 # we need to overwrite some macros for ipv6
171 my $pve_ipv6fw_macros = {
173 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'echo-request' },
175 'NeighborDiscovery' => [
176 "IPv6 neighbor solicitation, neighbor and router advertisement",
177 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'router-solicitation' },
178 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'router-advertisement' },
179 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'neighbor-solicitation' },
180 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'neighbor-advertisement' },
184 { action
=> 'PARAM', proto
=> 'udp', dport
=> '546:547', sport
=> '546:547' },
187 { action
=> 'PARAM', proto
=> 'udp', dport
=> '33434:33524' },
188 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'echo-request' },
192 # imported/converted from: /usr/share/shorewall/macro.*
193 my $pve_fw_macros = {
196 { action
=> 'PARAM', proto
=> 'udp', dport
=> '10080' },
197 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10080' },
200 "Auth (identd) traffic",
201 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '113' },
204 "Border Gateway Protocol traffic",
205 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '179' },
208 "BitTorrent traffic for BitTorrent 3.1 and earlier",
209 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6889' },
210 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
213 "BitTorrent traffic for BitTorrent 3.2 and later",
214 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6999' },
215 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
218 "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Daemons)",
219 # Legacy port for protocol v1
220 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6789' },
221 # New port for protocol v2
222 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3300' },
223 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6800:7300' },
226 "Concurrent Versions System pserver traffic",
227 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2401' },
230 "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
231 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1494' },
232 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1604' },
233 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2598' },
236 "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
237 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3689' },
238 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3689' },
241 "Distributed Checksum Clearinghouse spam filtering mechanism",
242 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6277' },
245 "Forwarded DHCP traffic",
246 { action
=> 'PARAM', proto
=> 'udp', dport
=> '67:68', sport
=> '67:68' },
249 "Domain Name System traffic (upd and tcp)",
250 { action
=> 'PARAM', proto
=> 'udp', dport
=> '53' },
251 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '53' },
254 "Distributed Compiler service",
255 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3632' },
258 "File Transfer Protocol",
259 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '21' },
262 "Finger protocol (RFC 742)",
263 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '79' },
266 "GNUnet secure peer-to-peer networking traffic",
267 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2086' },
268 { action
=> 'PARAM', proto
=> 'udp', dport
=> '2086' },
269 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1080' },
270 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1080' },
273 "Generic Routing Encapsulation tunneling protocol",
274 { action
=> 'PARAM', proto
=> '47' },
277 "Git distributed revision control traffic",
278 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9418' },
281 "OpenPGP HTTP key server protocol traffic",
282 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '11371' },
285 "Hypertext Transfer Protocol (WWW)",
286 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
289 "Hypertext Transfer Protocol (WWW) over SSL",
290 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
293 "Internet Cache Protocol V2 (Squid) traffic",
294 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3130' },
297 "AOL Instant Messenger traffic",
298 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5190' },
301 "Internet Message Access Protocol",
302 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '143' },
305 "Internet Message Access Protocol over SSL",
306 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '993' },
309 "IPIP capsulation traffic",
310 { action
=> 'PARAM', proto
=> '94' },
314 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
315 { action
=> 'PARAM', proto
=> '50' },
318 "IPsec authentication (AH) traffic",
319 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
320 { action
=> 'PARAM', proto
=> '51' },
323 "IPsec traffic and Nat-Traversal",
324 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500' },
325 { action
=> 'PARAM', proto
=> 'udp', dport
=> '4500' },
326 { action
=> 'PARAM', proto
=> '50' },
329 "Internet Relay Chat traffic",
330 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6667' },
333 "HP Jetdirect printing",
334 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9100' },
337 "Layer 2 Tunneling Protocol traffic",
338 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1701' },
341 "Lightweight Directory Access Protocol traffic",
342 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '389' },
345 "Secure Lightweight Directory Access Protocol traffic",
346 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '636' },
349 "Microsoft Notification Protocol",
350 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1863' },
353 "Microsoft SQL Server",
354 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1433' },
357 "Mail traffic (SMTP, SMTPS, Submission)",
358 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
359 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
360 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
364 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5353' },
367 "Munin networked resource monitoring traffic",
368 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '4949' },
372 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3306' },
375 "NNTP traffic (Usenet).",
376 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '119' },
379 "Encrypted NNTP traffic (Usenet)",
380 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '563' },
383 "Network Time Protocol (ntpd)",
384 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
387 "OSPF multicast traffic",
388 { action
=> 'PARAM', proto
=> '89' },
392 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1194' },
395 "Symantec PCAnywere (tm)",
396 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5632' },
397 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5631' },
400 "Proxmox Mail Gateway web interface",
401 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '8006' },
405 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '110' },
408 "Encrypted POP3 traffic",
409 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '995' },
412 "Point-to-Point Tunneling Protocol",
413 { action
=> 'PARAM', proto
=> '47' },
414 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1723' },
418 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
422 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5432' },
425 "Line Printer protocol printing",
426 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '515' },
429 "Microsoft Remote Desktop Protocol traffic",
430 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3389' },
433 "Routing Information Protocol (bidirectional)",
434 { action
=> 'PARAM', proto
=> 'udp', dport
=> '520' },
437 "BIND remote management protocol",
438 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '953' },
441 "Razor Antispam System",
442 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2703' },
445 "Remote time retrieval (rdate)",
446 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
450 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '873' },
453 "SANE network scanning",
454 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6566' },
457 "Microsoft SMB traffic",
458 { action
=> 'PARAM', proto
=> 'udp', dport
=> '135,445' },
459 { action
=> 'PARAM', proto
=> 'udp', dport
=> '137:139' },
460 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
461 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '135,139,445' },
464 "Samba Web Administration Tool",
465 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '901' },
468 "Simple Mail Transfer Protocol",
469 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
472 "Encrypted Simple Mail Transfer Protocol",
473 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
476 "Simple Network Management Protocol",
477 { action
=> 'PARAM', proto
=> 'udp', dport
=> '161:162' },
478 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '161' },
481 "Spam Assassin SPAMD traffic",
482 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '783' },
485 "Secure shell traffic",
486 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '22' },
489 "Subversion server (svnserve)",
490 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3690' },
493 "SixXS IPv6 Deployment and Tunnel Broker",
494 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3874' },
495 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3740' },
496 { action
=> 'PARAM', proto
=> '41' },
497 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5072,8374' },
500 "Proxmox VE SPICE display proxy traffic",
501 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3128' },
504 "Squid web proxy traffic",
505 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3128' },
508 "Mail message submission traffic",
509 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
512 "Syslog protocol (RFC 5424) traffic",
513 { action
=> 'PARAM', proto
=> 'udp', dport
=> '514' },
514 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '514' },
517 "Trivial File Transfer Protocol traffic",
518 { action
=> 'PARAM', proto
=> 'udp', dport
=> '69' },
522 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '23' },
526 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '992' },
529 "RFC 868 Time protocol",
530 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
533 "Traceroute (for up to 30 hops) traffic",
534 { action
=> 'PARAM', proto
=> 'udp', dport
=> '33434:33524' },
535 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
538 "VNC traffic for VNC display's 0 - 99",
539 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5900:5999' },
542 "VNC traffic from Vncservers to Vncviewers in listen mode",
543 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5500' },
546 "WWW traffic (HTTP and HTTPS)",
547 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
548 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
551 "Web Cache/Proxy traffic (port 8080)",
552 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '8080' },
556 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10000' },
559 "Whois (nicname, RFC 3912) traffic",
560 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '43' },
564 my $pve_fw_parsed_macros;
565 my $pve_fw_macro_descr;
566 my $pve_fw_macro_ipversion = {};
567 my $pve_fw_preferred_macro_names = {};
569 my $FWACCEPTMARK_ON = "0x80000000/0x80000000";
570 my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
572 my $pve_std_chains = {};
573 my $pve_std_chains_conf = {};
574 $pve_std_chains_conf->{4} = {
575 'PVEFW-SET-ACCEPT-MARK' => [
576 { target
=> "-j MARK --set-mark $FWACCEPTMARK_ON" },
578 'PVEFW-DropBroadcast' => [
579 # same as shorewall 'Broadcast'
580 # simply DROP BROADCAST/MULTICAST/ANYCAST
581 # we can use this to reduce logging
582 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
583 { action
=> 'DROP', dsttype
=> 'MULTICAST' },
584 { action
=> 'DROP', dsttype
=> 'ANYCAST' },
585 { action
=> 'DROP', dest
=> '224.0.0.0/4' },
588 # same as shorewall 'reject'
589 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
590 { action
=> 'DROP', source
=> '224.0.0.0/4' },
591 { action
=> 'DROP', proto
=> 'icmp' },
592 { match
=> '-p tcp', target
=> '-j REJECT --reject-with tcp-reset' },
593 { match
=> '-p udp', target
=> '-j REJECT --reject-with icmp-port-unreachable' },
594 { match
=> '-p icmp', target
=> '-j REJECT --reject-with icmp-host-unreachable' },
595 { target
=> '-j REJECT --reject-with icmp-host-prohibited' },
598 # same as shorewall 'Drop', which is equal to DROP,
599 # but REJECT/DROP some packages to reduce logging,
600 # and ACCEPT critical ICMP types
601 # we are not interested in BROADCAST/MULTICAST/ANYCAST
602 { action
=> 'PVEFW-DropBroadcast' },
603 # ACCEPT critical ICMP types
604 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
605 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
606 # Drop packets with INVALID state
607 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
608 # Drop Microsoft SMB noise
609 { action
=> 'DROP', proto
=> 'udp', dport
=> '135,445' },
610 { action
=> 'DROP', proto
=> 'udp', dport
=> '137:139' },
611 { action
=> 'DROP', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
612 { action
=> 'DROP', proto
=> 'tcp', dport
=> '135,139,445' },
613 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
614 # Drop new/NotSyn traffic so that it doesn't get logged
615 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
617 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
620 # same as shorewall 'Reject', which is equal to Reject,
621 # but REJECT/DROP some packages to reduce logging,
622 # and ACCEPT critical ICMP types
623 # we are not interested in BROADCAST/MULTICAST/ANYCAST
624 { action
=> 'PVEFW-DropBroadcast' },
625 # ACCEPT critical ICMP types
626 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
627 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
628 # Drop packets with INVALID state
629 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
630 # Drop Microsoft SMB noise
631 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '135,445' },
632 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '137:139'},
633 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
634 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '135,139,445' },
635 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
636 # Drop new/NotSyn traffic so that it doesn't get logged
637 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
639 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
641 'PVEFW-tcpflags' => [
642 # same as shorewall tcpflags action.
643 # Packets arriving on this interface are checked for some illegal combinations of TCP flags
644 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target
=> '-g PVEFW-logflags' },
645 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target
=> '-g PVEFW-logflags' },
646 { match
=> '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target
=> '-g PVEFW-logflags' },
647 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target
=> '-g PVEFW-logflags' },
648 { match
=> '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target
=> '-g PVEFW-logflags' },
651 # same as shorewall smurfs action
652 # Filter packets for smurfs (packets with a broadcast address as the source).
653 { match
=> '-s 0.0.0.0/32', target
=> '-j RETURN' }, # allow DHCP
654 { match
=> '-m addrtype --src-type BROADCAST', target
=> '-g PVEFW-smurflog' },
655 { match
=> '-s 224.0.0.0/4', target
=> '-g PVEFW-smurflog' },
657 'PVEFW-smurflog' => [
658 { action
=> 'DROP', logmsg
=> 'DROP: ' },
660 'PVEFW-logflags' => [
661 { action
=> 'DROP', logmsg
=> 'DROP: ' },
665 $pve_std_chains_conf->{6} = {
666 'PVEFW-SET-ACCEPT-MARK' => [
667 { target
=> "-j MARK --set-mark $FWACCEPTMARK_ON" },
669 'PVEFW-DropBroadcast' => [
670 # same as shorewall 'Broadcast'
671 # simply DROP BROADCAST/MULTICAST/ANYCAST
672 # we can use this to reduce logging
673 #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
674 # ipv6 addrtype does not work with kernel 2.6.32
675 #{ action => 'DROP', dsttype => 'MULTICAST' },
676 #{ action => 'DROP', dsttype => 'ANYCAST' },
677 { action
=> 'DROP', dest
=> 'ff00::/8' },
678 #{ action => 'DROP', dest => '224.0.0.0/4' },
681 { action
=> 'DROP', proto
=> 'icmpv6' },
682 { match
=> '-p tcp', target
=> '-j REJECT --reject-with tcp-reset' },
683 { match
=> '-p udp', target
=> '-j REJECT --reject-with icmp6-port-unreachable' },
684 { target
=> '-j REJECT --reject-with icmp6-adm-prohibited' },
687 # same as shorewall 'Drop', which is equal to DROP,
688 # but REJECT/DROP some packages to reduce logging,
689 # and ACCEPT critical ICMP types
690 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
691 # we are not interested in BROADCAST/MULTICAST/ANYCAST
692 { action
=> 'PVEFW-DropBroadcast' },
693 # ACCEPT critical ICMP types
694 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'destination-unreachable' },
695 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'time-exceeded' },
696 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'packet-too-big' },
697 # Drop packets with INVALID state
698 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
699 # Drop Microsoft SMB noise
700 { action
=> 'DROP', proto
=> 'udp', dport
=> '135,445' },
701 { action
=> 'DROP', proto
=> 'udp', dport
=> '137:139'},
702 { action
=> 'DROP', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
703 { action
=> 'DROP', proto
=> 'tcp', dport
=> '135,139,445' },
704 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
705 # Drop new/NotSyn traffic so that it doesn't get logged
706 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
708 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
711 # same as shorewall 'Reject', which is equal to Reject,
712 # but REJECT/DROP some packages to reduce logging,
713 # and ACCEPT critical ICMP types
714 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
715 # we are not interested in BROADCAST/MULTICAST/ANYCAST
716 { action
=> 'PVEFW-DropBroadcast' },
717 # ACCEPT critical ICMP types
718 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'destination-unreachable' },
719 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'time-exceeded' },
720 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'packet-too-big' },
721 # Drop packets with INVALID state
722 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
723 # Drop Microsoft SMB noise
724 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '135,445' },
725 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '137:139' },
726 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
727 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '135,139,445' },
728 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
729 # Drop new/NotSyn traffic so that it doesn't get logged
730 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
732 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
734 'PVEFW-tcpflags' => [
735 # same as shorewall tcpflags action.
736 # Packets arriving on this interface are checked for some illegal combinations of TCP flags
737 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target
=> '-g PVEFW-logflags' },
738 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target
=> '-g PVEFW-logflags' },
739 { match
=> '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target
=> '-g PVEFW-logflags' },
740 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target
=> '-g PVEFW-logflags' },
741 { match
=> '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target
=> '-g PVEFW-logflags' },
743 'PVEFW-logflags' => [
744 { action
=> 'DROP', logmsg
=> 'DROP: ' },
748 # iptables -p icmp -h
749 my $icmp_type_names = {
752 'destination-unreachable' => 1,
753 'network-unreachable' => 1,
754 'host-unreachable' => 1,
755 'protocol-unreachable' => 1,
756 'port-unreachable' => 1,
757 'fragmentation-needed' => 1,
758 'source-route-failed' => 1,
759 'network-unknown' => 1,
761 'network-prohibited' => 1,
762 'host-prohibited' => 1,
763 'TOS-network-unreachable' => 1,
764 'TOS-host-unreachable' => 1,
765 'communication-prohibited' => 1,
766 'host-precedence-violation' => 1,
767 'precedence-cutoff' => 1,
768 'source-quench' => 1,
770 'network-redirect' => 1,
771 'host-redirect' => 1,
772 'TOS-network-redirect' => 1,
773 'TOS-host-redirect' => 1,
775 'router-advertisement' => 1,
776 'router-solicitation' => 1,
777 'time-exceeded' => 1,
778 'ttl-zero-during-transit' => 1,
779 'ttl-zero-during-reassembly' => 1,
780 'parameter-problem' => 1,
781 'ip-header-bad' => 1,
782 'required-option-missing' => 1,
783 'timestamp-request' => 1,
784 'timestamp-reply' => 1,
785 'address-mask-request' => 1,
786 'address-mask-reply' => 1,
789 # ip6tables -p icmpv6 -h
791 my $icmpv6_type_names = {
792 'destination-unreachable' => 1,
794 'communication-prohibited' => 1,
796 'address-unreachable' => 1,
797 'port-unreachable' => 1,
798 'failed-policy' => 1,
800 'packet-too-big' => 1,
801 'time-exceeded' => 1,
802 'ttl-zero-during-transit' => 1,
803 'ttl-zero-during-reassembly' => 1,
804 'parameter-problem' => 1,
806 'unknown-header-type' => 1,
807 'unknown-option' => 1,
810 'router-solicitation' => 1,
811 'router-advertisement' => 1,
812 'neighbor-solicitation' => 1,
813 'neighbour-solicitation' => 1,
814 'neighbor-advertisement' => 1,
815 'neighbour-advertisement' => 1,
819 my $is_valid_icmp_type = sub {
820 my ($type, $valid_types) = @_;
822 if ($type =~ m/^\d+$/) {
823 # values for icmp-type range between 0 and 255 (8 bit field)
824 die "invalid icmp-type '$type'\n" if $type > 255;
826 die "unknown icmp-type '$type'\n" if !defined($valid_types->{$type});
830 sub init_firewall_macros
{
832 $pve_fw_parsed_macros = {};
835 my ($k, $macro) = @_;
836 my $lc_name = lc($k);
837 $pve_fw_macro_ipversion->{$k} = 0;
838 while (!ref($macro->[0])) {
839 my $desc = shift @$macro;
840 if ($desc eq 'ipv4only') {
841 $pve_fw_macro_ipversion->{$k} = 4;
842 } elsif ($desc eq 'ipv6only') {
843 $pve_fw_macro_ipversion->{$k} = 6;
845 $pve_fw_macro_descr->{$k} = $desc;
848 $pve_fw_preferred_macro_names->{$lc_name} = $k;
849 $pve_fw_parsed_macros->{$k} = $macro;
852 foreach my $k (keys %$pve_fw_macros) {
853 &$parse($k, $pve_fw_macros->{$k});
856 foreach my $k (keys %$pve_ipv6fw_macros) {
857 next if $pve_fw_parsed_macros->{$k};
858 &$parse($k, $pve_ipv6fw_macros->{$k});
859 $pve_fw_macro_ipversion->{$k} = 6;
863 init_firewall_macros
();
866 return wantarray ?
($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
871 sub get_etc_services
{
873 return $etc_services if $etc_services;
875 my $filename = "/etc/services";
877 my $fh = IO
::File-
>new($filename, O_RDONLY
);
879 warn "unable to read '$filename' - $!\n";
885 while (my $line = <$fh>) {
887 next if $line =~m/^#/;
888 next if ($line =~m/^\s*$/);
890 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp|sctp).*$!) {
891 $services->{byid
}->{$2}->{name
} = $1;
892 $services->{byid
}->{$2}->{port
} = $2;
893 $services->{byid
}->{$2}->{$3} = 1;
894 $services->{byname
}->{$1} = $services->{byid
}->{$2};
900 $etc_services = $services;
903 return $etc_services;
906 sub parse_protocol_file
{
909 my $fh = IO
::File-
>new($filename, O_RDONLY
);
911 warn "unable to read '$filename' - $!\n";
917 while (my $line = <$fh>) {
919 next if $line =~m/^#/;
920 next if ($line =~m/^\s*$/);
922 if ($line =~ m!^(\S+)\s+(\d+)(?:\s+.*)?$!) {
923 $protocols->{byid
}->{$2}->{name
} = $1;
924 $protocols->{byname
}->{$1} = $protocols->{byid
}->{$2};
935 sub get_etc_protocols
{
936 return $etc_protocols if $etc_protocols;
938 my $protocols = parse_protocol_file
('/etc/protocols');
940 # add special case for ICMP v6
941 $protocols->{byid
}->{icmpv6
}->{name
} = "icmpv6";
942 $protocols->{byname
}->{icmpv6
} = $protocols->{byid
}->{icmpv6
};
944 $etc_protocols = $protocols;
946 return $etc_protocols;
951 sub get_etc_ethertypes
{
952 $etc_ethertypes = parse_protocol_file
('/etc/ethertypes')
954 return $etc_ethertypes;
960 my ($new_value) = @_;
962 $__local_network = $new_value if defined($new_value);
964 return $__local_network if defined($__local_network);
967 my $nodename = PVE
::INotify
::nodename
();
969 my $ip = PVE
::Cluster
::remote_node_ip
($nodename);
971 my $testip = Net
::IP-
>new($ip);
973 my $isv6 = $testip->version == 6;
974 my $routes = $isv6 ? PVE
::ProcFSTools
::read_proc_net_ipv6_route
()
975 : PVE
::ProcFSTools
::read_proc_net_route
();
976 foreach my $entry (@$routes) {
979 $mask = $entry->{prefix
};
980 next if !$mask; # skip the default route...
982 $mask = $PVE::Network
::ipv4_mask_hash_localnet-
>{$entry->{mask
}};
983 next if !defined($mask);
985 my $cidr = "$entry->{dest}/$mask";
986 my $testnet = Net
::IP-
>new($cidr);
987 my $overlap = $testnet->overlaps($testip);
988 if ($overlap == $Net::IP
::IP_B_IN_A_OVERLAP
||
989 $overlap == $Net::IP
::IP_IDENTICAL
)
991 $__local_network = $cidr;
998 return $__local_network;
1001 # ipset names are limited to 31 characters,
1002 # and we use '-v4' or '-v6' to indicate IP versions,
1003 # and we use '_swap' suffix for atomic update,
1004 # for example PVEFW-${VMID}-${ipset_name}_swap
1006 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
1008 sub compute_ipset_chain_name
{
1009 my ($vmid, $ipset_name, $ipversion) = @_;
1011 $vmid = 0 if !defined($vmid);
1013 my $id = "$vmid-${ipset_name}-v$ipversion";
1015 if (length($id) > $max_iptables_ipset_name_length) {
1016 $id = PVE
::Tools
::fnv31a_hex
($id);
1022 sub compute_ipfilter_ipset_name
{
1025 return "ipfilter-$iface";
1028 sub parse_address_list
{
1031 if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
1032 die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
1036 if ($str =~ m/^${ip_alias_pattern}$/) {
1037 die "alias name too long\n" if length($str) > $max_alias_name_length;
1045 my @elements = split(/,/, $str);
1046 die "extraneous commas in list\n" if $str ne join(',', @elements);
1047 foreach my $elem (@elements) {
1049 my $ip = Net
::IP-
>new($elem);
1051 my $err = Net
::IP
::Error
();
1052 die "invalid IP address: $err\n";
1054 $iprange = 1 if $elem =~ m/-/;
1056 my $new_ipversion = Net
::IP
::ip_is_ipv6
($ip->ip()) ?
6 : 4;
1058 die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
1059 if $ipversion && ($new_ipversion != $ipversion);
1061 $ipversion = $new_ipversion;
1064 die "you can't use a range in a list\n" if $iprange && $count > 1;
1069 sub parse_port_name_number_or_range
{
1070 my ($str, $dport) = @_;
1072 my $services = PVE
::Firewall
::get_etc_services
();
1076 my @elements = split(/,/, $str);
1077 die "extraneous commas in list\n" if $str ne join(',', @elements);
1078 foreach my $item (@elements) {
1079 if ($item =~ m/^([0-9]+):([0-9]+)$/) {
1081 my ($port1, $port2) = ($1, $2);
1082 die "invalid port '$port1'\n" if $port1 > 65535;
1083 die "invalid port '$port2'\n" if $port2 > 65535;
1084 die "backwards range '$port1:$port2' not allowed, did you mean '$port2:$port1'?\n" if $port1 > $port2;
1085 } elsif ($item =~ m/^([0-9]+)$/) {
1088 die "invalid port '$port'\n" if $port > 65535;
1090 if ($dport && $icmp_type_names->{$item}) {
1092 } elsif ($dport && $icmpv6_type_names->{$item}) {
1095 die "invalid port '$item'\n" if !$services->{byname
}->{$item};
1100 die "ICMP ports not allowed in port range\n" if $icmp_port && $count > 0;
1102 # I really don't like to use the word number here, but it's the only thing
1103 # that makes sense in a literal way. The range 1:100 counts as 2, not as
1104 # one and not as 100...
1105 die "too many entries in port list (> 15 numbers)\n"
1108 return (scalar(@elements) > 1);
1111 PVE
::JSONSchema
::register_format
('pve-fw-sport-spec', \
&pve_fw_verify_sport_spec
);
1112 sub pve_fw_verify_sport_spec
{
1115 parse_port_name_number_or_range
($portstr, 0);
1120 PVE
::JSONSchema
::register_format
('pve-fw-dport-spec', \
&pve_fw_verify_dport_spec
);
1121 sub pve_fw_verify_dport_spec
{
1124 parse_port_name_number_or_range
($portstr, 1);
1129 PVE
::JSONSchema
::register_format
('pve-fw-addr-spec', \
&pve_fw_verify_addr_spec
);
1130 sub pve_fw_verify_addr_spec
{
1133 parse_address_list
($list);
1138 PVE
::JSONSchema
::register_format
('pve-fw-protocol-spec', \
&pve_fw_verify_protocol_spec
);
1139 sub pve_fw_verify_protocol_spec
{
1142 my $protocols = get_etc_protocols
();
1144 die "unknown protocol '$proto'\n" if $proto &&
1145 !(defined($protocols->{byname
}->{$proto}) ||
1146 defined($protocols->{byid
}->{$proto}));
1151 PVE
::JSONSchema
::register_format
('pve-fw-icmp-type-spec', \
&pve_fw_verify_icmp_type_spec
);
1152 sub pve_fw_verify_icmp_type_spec
{
1153 my ($icmp_type) = @_;
1155 if ($icmp_type_names->{$icmp_type} || $icmpv6_type_names->{$icmp_type}) {
1159 die "invalid icmp-type value '$icmp_type'\n" if $icmp_type ne '';
1165 # helper function for API
1167 sub copy_opject_with_digest
{
1170 my $sha = Digest
::SHA-
>new('sha1');
1173 foreach my $k (sort keys %$object) {
1174 my $v = $object->{$k};
1175 next if !defined($v);
1177 $sha->add($k, ':', $v, "\n");
1180 my $digest = $sha->hexdigest;
1182 $res->{digest
} = $digest;
1184 return wantarray ?
($res, $digest) : $res;
1187 sub copy_list_with_digest
{
1190 my $sha = Digest
::SHA-
>new('sha1');
1193 foreach my $entry (@$list) {
1195 foreach my $k (sort keys %$entry) {
1196 my $v = $entry->{$k};
1197 next if !defined($v);
1199 # Note: digest ignores refs ($rule->{errors})
1200 # since Digest::SHA expects a series of bytes,
1201 # we have to encode the value here to prevent errors when
1202 # using utf8 characters (eg. in comments)
1203 $sha->add($k, ':', encode_utf8
($v), "\n") if !ref($v); ;
1208 my $digest = $sha->hexdigest;
1210 foreach my $entry (@$res) {
1211 $entry->{digest
} = $digest;
1214 return wantarray ?
($res, $digest) : $res;
1217 our $cluster_option_properties = {
1219 description
=> "Enable or disable the firewall cluster wide.",
1225 description
=> "Enable ebtables rules cluster wide.",
1231 description
=> "Input policy.",
1234 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1237 description
=> "Output policy.",
1240 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1243 description
=> "Log ratelimiting settings",
1244 type
=> 'string', format
=> {
1247 description
=> 'Enable or disable log rate limiting',
1253 description
=> 'Frequency with which the burst bucket gets refilled',
1255 pattern
=> '[1-9][0-9]*\/(second|minute|hour|day)',
1256 format_description
=> 'rate',
1257 default => '1/second',
1263 description
=> 'Initial burst of packages which will always get logged before the rate is applied',
1271 our $host_option_properties = {
1273 description
=> "Enable host firewall rules.",
1277 log_level_in
=> get_standard_option
('pve-fw-loglevel', {
1278 description
=> "Log level for incoming traffic." }),
1279 log_level_out
=> get_standard_option
('pve-fw-loglevel', {
1280 description
=> "Log level for outgoing traffic." }),
1281 tcp_flags_log_level
=> get_standard_option
('pve-fw-loglevel', {
1282 description
=> "Log level for illegal tcp flags filter." }),
1283 smurf_log_level
=> get_standard_option
('pve-fw-loglevel', {
1284 description
=> "Log level for SMURFS filter." }),
1286 description
=> "Enable SMURFS filter.",
1291 description
=> "Filter illegal combinations of TCP flags.",
1296 nf_conntrack_max
=> {
1297 description
=> "Maximum number of tracked connections.",
1303 nf_conntrack_tcp_timeout_established
=> {
1304 description
=> "Conntrack established timeout.",
1310 nf_conntrack_tcp_timeout_syn_recv
=> {
1311 description
=> "Conntrack syn recv timeout.",
1319 description
=> "Enable NDP (Neighbor Discovery Protocol).",
1324 nf_conntrack_allow_invalid
=> {
1325 description
=> "Allow invalid packets on connection tracking.",
1330 protection_synflood
=> {
1331 description
=> "Enable synflood protection",
1336 protection_synflood_rate
=> {
1337 description
=> "Synflood protection rate syn/sec by ip src.",
1342 protection_synflood_burst
=> {
1343 description
=> "Synflood protection rate burst by ip src.",
1348 log_nf_conntrack
=> {
1349 description
=> "Enable logging of conntrack information.",
1356 our $vm_option_properties = {
1358 description
=> "Enable/disable firewall rules.",
1364 description
=> "Enable/disable MAC address filter.",
1370 description
=> "Enable DHCP.",
1376 description
=> "Enable NDP (Neighbor Discovery Protocol).",
1382 description
=> "Allow sending Router Advertisement.",
1387 description
=> "Enable default IP filters. " .
1388 "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1389 "for every interface. Such ipsets implicitly contain sane default " .
1390 "restrictions such as restricting IPv6 link local addresses to " .
1391 "the one derived from the interface's MAC address. For containers " .
1392 "the configured IP addresses will be implicitly added.",
1397 description
=> "Input policy.",
1400 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1403 description
=> "Output policy.",
1406 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1408 log_level_in
=> get_standard_option
('pve-fw-loglevel', {
1409 description
=> "Log level for incoming traffic." }),
1410 log_level_out
=> get_standard_option
('pve-fw-loglevel', {
1411 description
=> "Log level for outgoing traffic." }),
1416 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.";
1418 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.";
1420 my $rule_properties = {
1422 description
=> "Update rule at position <pos>.",
1427 digest
=> get_standard_option
('pve-config-digest'),
1429 description
=> "Rule type.",
1432 enum
=> ['in', 'out', 'group'],
1435 description
=> "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1438 pattern
=> $security_group_name_pattern,
1443 description
=> "Use predefined standard macro.",
1448 iface
=> get_standard_option
('pve-iface', {
1449 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.",
1453 description
=> "Restrict packet source address. $addr_list_descr",
1454 type
=> 'string', format
=> 'pve-fw-addr-spec',
1459 description
=> "Restrict packet destination address. $addr_list_descr",
1460 type
=> 'string', format
=> 'pve-fw-addr-spec',
1465 description
=> "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1466 type
=> 'string', format
=> 'pve-fw-protocol-spec',
1470 description
=> "Flag to enable/disable a rule.",
1475 log => get_standard_option
('pve-fw-loglevel', {
1476 description
=> "Log level for firewall rule.",
1479 description
=> "Restrict TCP/UDP source port. $port_descr",
1480 type
=> 'string', format
=> 'pve-fw-sport-spec',
1484 description
=> "Restrict TCP/UDP destination port. $port_descr",
1485 type
=> 'string', format
=> 'pve-fw-dport-spec',
1489 description
=> "Descriptive comment.",
1494 description
=> "Specify icmp-type. Only valid if proto equals 'icmp'.",
1495 type
=> 'string', format
=> 'pve-fw-icmp-type-spec',
1500 sub add_rule_properties
{
1501 my ($properties) = @_;
1503 foreach my $k (keys %$rule_properties) {
1504 my $h = $rule_properties->{$k};
1505 # copy data, so that we can modify later without side effects
1506 foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1512 sub delete_rule_properties
{
1513 my ($rule, $delete_str) = @_;
1515 foreach my $opt (PVE
::Tools
::split_list
($delete_str)) {
1516 raise_param_exc
({ 'delete' => "no such property ('$opt')"})
1517 if !defined($rule_properties->{$opt});
1518 raise_param_exc
({ 'delete' => "unable to delete required property '$opt'"})
1519 if $opt eq 'type' || $opt eq 'action';
1520 delete $rule->{$opt};
1526 my $apply_macro = sub {
1527 my ($macro_name, $param, $verify, $ipversion) = @_;
1529 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1530 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1532 if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1533 $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1536 # skip macros which are specific to another ipversion
1537 if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1538 return if $ipversion != $required;
1543 foreach my $templ (@$macro_rules) {
1545 my $param_used = {};
1546 foreach my $k (keys %$templ) {
1547 my $v = $templ->{$k};
1548 if ($v eq 'PARAM') {
1550 $param_used->{$k} = 1;
1551 } elsif ($v eq 'DEST') {
1552 $v = $param->{dest
};
1553 $param_used->{dest
} = 1;
1554 } elsif ($v eq 'SOURCE') {
1555 $v = $param->{source
};
1556 $param_used->{source
} = 1;
1560 my $msg = "missing parameter '$k' in macro '$macro_name'";
1561 raise_param_exc
({ macro => $msg }) if $verify;
1566 foreach my $k (keys %$param) {
1567 next if $k eq 'macro';
1568 next if !defined($param->{$k});
1569 next if $param_used->{$k};
1570 if (defined($rule->{$k})) {
1571 if ($rule->{$k} ne $param->{$k}) {
1572 my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1573 raise_param_exc
({ $k => $msg }) if $verify;
1577 $rule->{$k} = $param->{$k};
1580 push @$rules, $rule;
1586 my $rule_env_iface_lookup = {
1595 my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1597 my $allow_groups = $rule_env eq 'group' ?
0 : 1;
1599 my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1600 die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1602 my $errors = $rule->{errors
} || {};
1604 my $error_count = 0;
1606 my $add_error = sub {
1607 my ($param, $msg) = @_;
1609 raise_param_exc
({ $param => $msg }) if !$noerr;
1611 $errors->{$param} = $msg if !$errors->{$param};
1615 my $set_ip_version = sub {
1618 die "detected mixed ipv4/ipv6 addresses in rule\n"
1619 if $ipversion && ($vers != $ipversion);
1624 my $check_ipset_or_alias_property = sub {
1625 my ($name, $expected_ipversion) = @_;
1627 if (my $value = $rule->{$name}) {
1628 if ($value =~ m/^\+/) {
1629 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1630 &$add_error($name, "no such ipset '$1'")
1631 if !($cluster_conf->{ipset
}->{$1} || ($fw_conf && $fw_conf->{ipset
}->{$1}));
1634 &$add_error($name, "invalid ipset name '$value'");
1636 } elsif ($value =~ m/^${ip_alias_pattern}$/){
1637 my $alias = lc($value);
1638 &$add_error($name, "no such alias '$value'")
1639 if !($cluster_conf->{aliases
}->{$alias} || ($fw_conf && $fw_conf->{aliases
}->{$alias}));
1640 my $e = $fw_conf ?
$fw_conf->{aliases
}->{$alias} : undef;
1641 $e = $cluster_conf->{aliases
}->{$alias} if !$e && $cluster_conf;
1643 &$set_ip_version($e->{ipversion
});
1648 my $type = $rule->{type
};
1649 my $action = $rule->{action
};
1651 &$add_error('type', "missing property") if !$type;
1652 &$add_error('action', "missing property") if !$action;
1655 if ($type eq 'in' || $type eq 'out') {
1656 &$add_error('action', "unknown action '$action'")
1657 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1658 } elsif ($type eq 'group') {
1659 &$add_error('type', "security groups not allowed")
1661 &$add_error('action', "invalid characters in security group name")
1662 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1664 &$add_error('type', "unknown rule type '$type'");
1668 if ($rule->{iface
}) {
1669 &$add_error('type', "parameter -i not allowed for this rule type")
1671 eval { PVE
::JSONSchema
::pve_verify_iface
($rule->{iface
}); };
1672 &$add_error('iface', $@) if $@;
1673 if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1674 &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1675 if $rule->{iface
} !~ m/^net(\d+)$/;
1679 if ($rule->{macro}) {
1680 if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1681 $rule->{macro} = $preferred_name;
1683 &$add_error('macro', "unknown macro '$rule->{macro}'");
1687 if ($rule->{proto
}) {
1688 eval { pve_fw_verify_protocol_spec
($rule->{proto
}); };
1689 &$add_error('proto', $@) if $@;
1690 &$set_ip_version(4) if $rule->{proto
} eq 'icmp';
1691 &$set_ip_version(6) if $rule->{proto
} eq 'icmpv6';
1692 &$set_ip_version(6) if $rule->{proto
} eq 'ipv6-icmp';
1695 if ($rule->{dport
}) {
1696 eval { parse_port_name_number_or_range
($rule->{dport
}, 1); };
1697 &$add_error('dport', $@) if $@;
1698 my $proto = $rule->{proto
};
1699 &$add_error('proto', "missing property - 'dport' requires this property")
1701 &$add_error('dport', "protocol '$proto' does not support ports")
1702 if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1703 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1706 if (my $icmp_type = $rule ->{'icmp-type'}) {
1707 my $proto = $rule->{proto
};
1708 &$add_error('proto', "missing property - 'icmp-type' requires this property")
1709 if $proto ne 'icmp' && $proto ne 'icmpv6' && $proto ne 'ipv6-icmp';
1710 &$add_error('icmp-type', "'icmp-type' cannot be specified together with 'dport'")
1712 if ($proto eq 'icmp' && !$icmp_type_names->{$icmp_type}) {
1713 &$add_error('icmp-type', "invalid icmp-type '$icmp_type' for proto 'icmp'");
1714 } elsif (($proto eq 'icmpv6' || $proto eq 'ipv6-icmp') && !$icmpv6_type_names->{$icmp_type}) {
1715 &$add_error('icmp-type', "invalid icmp-type '$icmp_type' for proto '$proto'");
1719 if ($rule->{sport
}) {
1720 eval { parse_port_name_number_or_range
($rule->{sport
}, 0); };
1721 &$add_error('sport', $@) if $@;
1722 my $proto = $rule->{proto
};
1723 &$add_error('proto', "missing property - 'sport' requires this property")
1725 &$add_error('sport', "protocol '$proto' does not support ports")
1726 if !$PROTOCOLS_WITH_PORTS->{$proto};
1729 if ($rule->{source
}) {
1731 my $source_ipversion = parse_address_list
($rule->{source
});
1732 &$set_ip_version($source_ipversion);
1734 &$add_error('source', $@) if $@;
1735 &$check_ipset_or_alias_property('source', $ipversion);
1738 if ($rule->{dest
}) {
1740 my $dest_ipversion = parse_address_list
($rule->{dest
});
1741 &$set_ip_version($dest_ipversion);
1743 &$add_error('dest', $@) if $@;
1744 &$check_ipset_or_alias_property('dest', $ipversion);
1747 $rule->{ipversion
} = $ipversion if $ipversion;
1749 if ($rule->{macro} && !$error_count) {
1750 eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1752 if (ref($err) eq "PVE::Exception" && $err->{errors
}) {
1753 my $eh = $err->{errors
};
1754 foreach my $p (keys %$eh) {
1755 &$add_error($p, $eh->{$p});
1758 &$add_error('macro', "$err");
1763 $rule->{errors
} = $errors if $error_count;
1768 sub copy_rule_data
{
1769 my ($rule, $param) = @_;
1771 foreach my $k (keys %$rule_properties) {
1772 if (defined(my $v = $param->{$k})) {
1773 if ($v eq '' || $v eq '-') {
1784 sub rules_modify_permissions
{
1785 my ($rule_env) = @_;
1787 if ($rule_env eq 'host') {
1789 check
=> ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1791 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1793 check
=> ['perm', '/', [ 'Sys.Modify' ]],
1795 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1797 check
=> ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1804 sub rules_audit_permissions
{
1805 my ($rule_env) = @_;
1807 if ($rule_env eq 'host') {
1809 check
=> ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1811 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1813 check
=> ['perm', '/', [ 'Sys.Audit' ]],
1815 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1817 check
=> ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1826 sub enable_bridge_firewall
{
1829 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1830 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1832 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1833 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/ipv4/tcp_syncookies", "1");
1837 sub iptables_restore_cmdlist
{
1838 my ($cmdlist, $table) = @_;
1840 $table = 'filter' if !$table;
1841 run_command
(['iptables-restore', '-T', $table, '-n'], input
=> $cmdlist, errmsg
=> "iptables_restore_cmdlist");
1844 sub ip6tables_restore_cmdlist
{
1845 my ($cmdlist, $table) = @_;
1847 $table = 'filter' if !$table;
1848 run_command
(['ip6tables-restore', '-T', $table, '-n'], input
=> $cmdlist, errmsg
=> "iptables_restore_cmdlist");
1851 sub ipset_restore_cmdlist
{
1854 run_command
(['ipset', 'restore'], input
=> $cmdlist, errmsg
=> "ipset_restore_cmdlist");
1857 sub ebtables_restore_cmdlist
{
1860 run_command
(['ebtables-restore'], input
=> $cmdlist, errmsg
=> "ebtables_restore_cmdlist");
1863 sub iptables_get_chains
{
1864 my ($iptablescmd, $t) = @_;
1866 $iptablescmd = "iptables" if !$iptablescmd;
1867 $t = 'filter' if !$t;
1871 # check what chains we want to track
1872 my $is_pvefw_chain = sub {
1875 return 1 if $name =~ m/^PVEFW-\S+$/;
1877 return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1879 return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1881 return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1882 return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1894 return if $line =~ m/^#/;
1895 return if $line =~ m/^\s*$/;
1897 if ($line =~ m/^\*(\S+)$/) {
1902 return if $table ne $t;
1904 if ($line =~ m/^:(\S+)\s/) {
1906 return if !&$is_pvefw_chain($chain);
1907 $res->{$chain} = "unknown";
1908 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1909 my ($chain, $sig) = ($1, $2);
1910 return if !&$is_pvefw_chain($chain);
1911 $res->{$chain} = $sig;
1912 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD|PREROUTING)\s+-j\s+PVEFW-\1$/) {
1915 # simply ignore the rest
1920 run_command
(["$iptablescmd-save"], outfunc
=> $parser);
1922 return wantarray ?
($res, $hooks) : $res;
1925 sub iptables_chain_digest
{
1927 my $digest = Digest
::SHA-
>new('sha1');
1928 foreach my $rule (@$rules) { # order is important
1929 $digest->add($rule);
1931 return $digest->b64digest;
1934 sub ipset_chain_digest
{
1937 my $digest = Digest
::SHA-
>new('sha1');
1938 foreach my $rule (sort @$rules) { # note: sorted
1939 $digest->add($rule);
1941 return $digest->b64digest;
1944 sub ipset_get_chains
{
1952 return if $line =~ m/^#/;
1953 return if $line =~ m/^\s*$/;
1954 if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1956 # ignore initval from ipset v7.7+, won't set that yet so it'd mess up change detection
1957 $line =~ s/\binitval 0x[0-9a-f]+//;
1958 $line =~ s/\s+$//; # delete trailing white space
1959 push @{$chains->{$chain}}, $line;
1961 # simply ignore the rest
1966 run_command
(['ipset', 'save'], outfunc
=> $parser);
1968 # compute digest for each chain
1969 foreach my $chain (keys %$chains) {
1970 $res->{$chain} = ipset_chain_digest
($chains->{$chain});
1976 sub ebtables_get_chains
{
1983 return if $line =~ m/^#/;
1984 return if $line =~ m/^\s*$/;
1985 if ($line =~ m/^\*(\S+)$/) {
1990 return if $table ne "filter";
1992 if ($line =~ m/^:(\S+)\s(ACCEPT|DROP|RETURN)$/) {
1993 # Make sure we know chains exist even if they're empty.
1994 $chains->{$1} //= [];
1995 $res->{$1}->{policy
} = $2;
1996 } elsif ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
1999 push @{$chains->{$chain}}, $line;
2001 # simply ignore the rest
2006 run_command
(['ebtables-save'], outfunc
=> $parser);
2007 # compute digest for each chain and store rules as well
2008 foreach my $chain (keys %$chains) {
2009 $res->{$chain}->{rules
} = $chains->{$chain};
2010 $res->{$chain}->{sig
} = iptables_chain_digest
($chains->{$chain});
2015 # substitute action of rule according to action hash
2016 sub rule_substitude_action
{
2017 my ($rule, $actions) = @_;
2019 if (my $action = $rule->{action
}) {
2020 $rule->{action
} = $actions->{$action} if defined($actions->{$action});
2024 # generate a src or dst match
2025 # $dir(ection) is either d or s
2026 sub ipt_gen_src_or_dst_match
{
2027 my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
2032 } elsif ($dir eq 'd') {
2035 die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
2039 if ($adr =~ m/^\+/) {
2040 if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
2043 if ($fw_conf && $fw_conf->{ipset
}->{$name}) {
2044 $ipset_chain = compute_ipset_chain_name
($fw_conf->{vmid
}, $name, $ipversion);
2045 } elsif ($cluster_conf && $cluster_conf->{ipset
}->{$name}) {
2046 $ipset_chain = compute_ipset_chain_name
(0, $name, $ipversion);
2048 die "no such ipset '$name'\n";
2050 $match = "-m set --match-set ${ipset_chain} ${srcdst}";
2052 die "invalid security group name '$adr'\n";
2054 } elsif ($adr =~ m/^${ip_alias_pattern}$/){
2055 my $alias = lc($adr);
2056 my $e = $fw_conf ?
$fw_conf->{aliases
}->{$alias} : undef;
2057 $e = $cluster_conf->{aliases
}->{$alias} if !$e && $cluster_conf;
2058 die "no such alias '$adr'\n" if !$e;
2059 $match = "-${dir} $e->{cidr}";
2060 } elsif ($adr =~ m/\-/){
2061 $match = "-m iprange --${srcdst}-range $adr";
2063 $match = "-${dir} $adr";
2069 # convert a %rule to an array of iptables commands
2070 sub ipt_rule_to_cmds
{
2071 my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
2073 die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
2077 if (defined $rule->{match
}) {
2078 push @match, $rule->{match
};
2080 push @match, "-i $rule->{iface_in}" if $rule->{iface_in
};
2081 push @match, "-o $rule->{iface_out}" if $rule->{iface_out
};
2083 if ($rule->{source
}) {
2084 push @match, ipt_gen_src_or_dst_match
($rule->{source
}, 's', $ipversion, $cluster_conf, $fw_conf);
2086 if ($rule->{dest
}) {
2087 push @match, ipt_gen_src_or_dst_match
($rule->{dest
}, 'd', $ipversion, $cluster_conf, $fw_conf);
2090 if (my $proto = $rule->{proto
}) {
2091 push @match, "-p $proto";
2093 my $multidport = defined($rule->{dport
}) && parse_port_name_number_or_range
($rule->{dport
}, 1);
2094 my $multisport = defined($rule->{sport
}) && parse_port_name_number_or_range
($rule->{sport
}, 0);
2096 my $add_dport = sub {
2097 return if !defined($rule->{dport
});
2099 # NOTE: we re-use dport to store --icmp-type for icmp* protocol
2100 if ($proto eq 'icmp') {
2101 $is_valid_icmp_type->($rule->{dport
}, $icmp_type_names);
2102 push @match, "-m icmp --icmp-type $rule->{dport}";
2103 } elsif ($proto eq 'icmpv6') {
2104 $is_valid_icmp_type->($rule->{dport
}, $icmpv6_type_names);
2105 push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
2106 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
2107 die "protocol $proto does not have ports\n";
2108 } elsif ($multidport) {
2109 push @match, "--match multiport", "--dports $rule->{dport}";
2111 return if !$rule->{dport
};
2112 push @match, "--dport $rule->{dport}";
2116 my $add_sport = sub {
2117 return if !$rule->{sport
};
2119 die "protocol $proto does not have ports\n"
2120 if !$PROTOCOLS_WITH_PORTS->{$proto};
2122 push @match, "--match multiport", "--sports $rule->{sport}";
2124 push @match, "--sport $rule->{sport}";
2128 my $add_icmp_type = sub {
2129 return if !defined($rule->{'icmp-type'}) || $rule->{'icmp-type'} eq '';
2131 die "'icmp-type' can only be set if 'icmp', 'icmpv6' or 'ipv6-icmp' is specified\n"
2132 if ($proto ne 'icmp') && ($proto ne 'icmpv6') && ($proto ne 'ipv6-icmp');
2133 my $type = $proto eq 'icmp' ?
'icmp-type' : 'icmpv6-type';
2135 push @match, "-m $proto --$type $rule->{'icmp-type'}";
2138 # order matters - single port before multiport!
2140 $add_dport->() if $multisport;
2142 $add_dport->() if !$multisport;
2143 } elsif ($rule->{dport
} || $rule->{sport
}) {
2144 die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport
};
2145 die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport
};
2148 push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype
};
2150 my $matchstr = scalar(@match) ?
join(' ', @match) : "";
2153 if (defined $rule->{target
}) {
2154 $targetstr = $rule->{target
};
2156 my $action = (defined $rule->{action
}) ?
$rule->{action
} : "";
2157 my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
2158 $targetstr = ($goto) ?
"-g $action" : "-j $action";
2162 my $log = $rule->{log};
2163 if (defined($log) && $log ne 'nolog') {
2164 my $loglevel = $log_level_hash->{$log};
2165 my $logaction = get_log_rule_base
($chain, $vmid, $rule->{logmsg
}, $loglevel);
2166 push @iptcmds, "-A $chain $matchstr $logaction";
2168 push @iptcmds, "-A $chain $matchstr $targetstr";
2172 sub ruleset_generate_rule
{
2173 my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf, $vmid) = @_;
2177 if ($rule->{macro}) {
2178 $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
2183 # update all or nothing
2185 foreach my $r (@$rules) {
2186 push @ipt_rule_cmds, ipt_rule_to_cmds
($r, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid);
2188 foreach my $c (@ipt_rule_cmds) {
2189 ruleset_add_ipt_cmd
($ruleset, $chain, $c);
2193 sub ruleset_create_chain
{
2194 my ($ruleset, $chain) = @_;
2196 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
2197 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
2199 die "chain '$chain' already exists\n" if $ruleset->{$chain};
2201 $ruleset->{$chain} = [];
2204 sub ruleset_chain_exist
{
2205 my ($ruleset, $chain) = @_;
2207 return $ruleset->{$chain} ?
1 : undef;
2210 # add an iptables command (like generated by ipt_rule_to_cmds) to a chain
2211 sub ruleset_add_ipt_cmd
{
2212 my ($ruleset, $chain, $iptcmd) = @_;
2214 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2216 push @{$ruleset->{$chain}}, $iptcmd;
2219 sub ruleset_addrule
{
2220 my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
2222 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2225 my $loglevel = $log_level_hash->{$log};
2226 my $logaction = get_log_rule_base
($chain, $vmid, $logmsg, $loglevel);
2227 push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
2229 # for stable ebtables digests avoid double-spaces to match ebtables-save output
2230 $match .= ' ' if length($match);
2231 push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
2234 sub ruleset_insertrule
{
2235 my ($ruleset, $chain, $match, $action, $log) = @_;
2237 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2239 unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2242 sub get_log_rule_base
{
2243 my ($chain, $vmid, $msg, $loglevel) = @_;
2245 $vmid = 0 if !defined($vmid);
2246 $msg = "" if !defined($msg);
2249 if (defined($global_log_ratelimit)) {
2250 $rlimit = "-m limit $global_log_ratelimit ";
2253 # Note: we use special format for prefix to pass further
2254 # info to log daemon (VMID, LOGLEVEL and CHAIN)
2255 return "${rlimit}-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2258 sub ruleset_add_chain_policy {
2259 my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2261 if ($policy eq 'ACCEPT') {
2263 my $rule = { action => 'ACCEPT' };
2264 rule_substitude_action($rule, { ACCEPT => $accept_action});
2265 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2267 } elsif ($policy eq 'DROP') {
2269 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop
");
2271 ruleset_addrule($ruleset, $chain, "", "-j DROP
", $loglevel, "policy
$policy: ", $vmid);
2272 } elsif ($policy eq 'REJECT') {
2273 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject
");
2275 ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject
", $loglevel, "policy
$policy: ", $vmid);
2278 die "internal error
: unknown policy
'$policy'";
2282 sub ruleset_chain_add_ndp {
2283 my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2284 return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2286 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-solicitation
", $accept);
2287 if ($direction ne 'OUT' || $options->{radv}) {
2288 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-advertisement
", $accept);
2290 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type neighbor-solicitation
", $accept);
2291 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type neighbor-advertisement
", $accept);
2294 sub ruleset_chain_add_conn_filters {
2295 my ($ruleset, $chain, $allow_invalid, $accept) = @_;
2297 if (!$allow_invalid) {
2298 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
", "-j DROP
");
2300 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
", "-j
$accept");
2303 sub ruleset_chain_add_input_filters {
2304 my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2306 if ($cluster_conf->{ipset}->{blacklist}){
2307 if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist
")) {
2308 ruleset_create_chain($ruleset, "PVEFW-blacklist
");
2309 ruleset_addrule($ruleset, "PVEFW-blacklist
", "", "-j DROP
", $loglevel, "DROP
: ", 0);
2311 my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2312 ruleset_addrule($ruleset, $chain, "-m set
--match-set
${ipset_chain
} src
", "-j PVEFW-blacklist
");
2315 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2316 if ($ipversion == 4) {
2317 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
,NEW
", "-j PVEFW-smurfs
");
2321 if ($options->{tcpflags}) {
2322 ruleset_addrule($ruleset, $chain, "-p tcp
", "-j PVEFW-tcpflags
");
2326 sub ruleset_create_vm_chain {
2327 my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2329 ruleset_create_chain($ruleset, $chain);
2330 my $accept = generate_nfqueue($options);
2332 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2333 if ($ipversion == 4) {
2334 if ($direction eq 'OUT') {
2335 ruleset_generate_rule($ruleset, $chain, $ipversion,
2336 { action => 'PVEFW-SET-ACCEPT-MARK',
2337 proto => 'udp', sport => 68, dport => 67 });
2339 ruleset_generate_rule($ruleset, $chain, $ipversion,
2340 { action => 'ACCEPT',
2341 proto => 'udp', sport => 67, dport => 68 });
2343 } elsif ($ipversion == 6) {
2344 if ($direction eq 'OUT') {
2345 ruleset_generate_rule($ruleset, $chain, $ipversion,
2346 { action => 'PVEFW-SET-ACCEPT-MARK',
2347 proto => 'udp', sport => 546, dport => 547 });
2349 ruleset_generate_rule($ruleset, $chain, $ipversion,
2350 { action => 'ACCEPT',
2351 proto => 'udp', sport => 547, dport => 546 });
2357 if ($direction eq 'OUT') {
2358 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2359 ruleset_addrule($ruleset, $chain, "-m mac
! --mac-source
$macaddr", "-j DROP
");
2361 if ($ipversion == 6 && !$options->{radv}) {
2362 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-advertisement
", "-j DROP
");
2364 if ($ipfilter_ipset) {
2365 ruleset_addrule($ruleset, $chain, "-m set
! --match-set
$ipfilter_ipset src
", "-j DROP
");
2367 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2370 my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j
$accept";
2371 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2374 sub ruleset_add_group_rule {
2375 my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2377 my $group = $rule->{action};
2378 my $group_chain = "GROUP-
$group-$direction";
2379 if(!ruleset_chain_exist($ruleset, $group_chain)){
2380 generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2383 if ($direction eq 'OUT' && $rule->{iface_out}) {
2384 ruleset_addrule($ruleset, $chain, "-o
$rule->{iface_out
}", "-j
$group_chain");
2385 } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2386 ruleset_addrule($ruleset, $chain, "-i
$rule->{iface_in
}", "-j
$group_chain");
2388 ruleset_addrule($ruleset, $chain, "", "-j
$group_chain");
2391 ruleset_addrule($ruleset, $chain, "-m mark
--mark
$FWACCEPTMARK_ON", "-j
$action");
2394 sub ruleset_generate_vm_rules {
2395 my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion, $vmid) = @_;
2397 my $lc_direction = lc($direction);
2399 my $in_accept = generate_nfqueue($options);
2401 foreach my $rule (@$rules) {
2402 next if $rule->{iface} && $rule->{iface} ne $netid;
2403 next if !$rule->{enable} || $rule->{errors};
2404 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2406 if ($rule->{type} eq 'group') {
2407 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2408 $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2410 next if $rule->{type} ne $lc_direction;
2412 $rule->{logmsg} = "$rule->{action
}: ";
2413 if ($direction eq 'OUT') {
2414 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" });
2415 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2417 rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject
" });
2418 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2426 sub generate_nfqueue {
2429 if ($options->{ips}) {
2430 my $action = "NFQUEUE
";
2431 if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2432 if (defined($3) && defined($1)) {
2433 $action .= " --queue-balance
$1:$3";
2434 } elsif (defined($1)) {
2435 $action .= " --queue-num
$1";
2438 $action .= " --queue-bypass
" if $feature_ipset_nomatch; #need kernel 3.10
2445 sub ruleset_generate_vm_ipsrules {
2446 my ($ruleset, $options, $direction, $iface) = @_;
2448 if ($options->{ips} && $direction eq 'IN') {
2449 my $nfqueue = generate_nfqueue($options);
2451 if (!ruleset_chain_exist($ruleset, "PVEFW-IPS
")) {
2452 ruleset_create_chain($ruleset, "PVEFW-IPS
");
2455 ruleset_addrule($ruleset, "PVEFW-IPS
", "-m physdev
--physdev-out
$iface --physdev-is-bridged
", "-j
$nfqueue");
2459 sub generate_tap_rules_direction {
2460 my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2462 my $lc_direction = lc($direction);
2464 my $rules = $vmfw_conf->{rules};
2466 my $options = $vmfw_conf->{options};
2467 my $loglevel = get_option_log_level($options, "log_level_
${lc_direction
}");
2469 my $tapchain = "$iface-$direction";
2471 my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2472 my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2473 if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2475 if ($options->{enable}) {
2476 # create chain with mac and ip filter
2477 ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2479 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion, $vmid);
2481 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2486 if ($direction eq 'OUT') {
2487 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2489 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2492 my $accept = generate_nfqueue($options);
2493 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : $accept;
2494 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2496 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : 'ACCEPT';
2497 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2500 # plug the tap chain to bridge chain
2501 if ($direction eq 'IN') {
2502 ruleset_addrule($ruleset, "PVEFW-FWBR-IN
",
2503 "-m physdev
--physdev-is-bridged
--physdev-out
$iface", "-j
$tapchain");
2505 ruleset_addrule($ruleset, "PVEFW-FWBR-OUT
",
2506 "-m physdev
--physdev-is-bridged
--physdev-in
$iface", "-j
$tapchain");
2510 sub enable_host_firewall {
2511 my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf) = @_;
2513 my $options = $hostfw_conf->{options};
2514 my $cluster_options = $cluster_conf->{options};
2515 my $rules = $hostfw_conf->{rules};
2516 my $cluster_rules = $cluster_conf->{rules};
2518 # corosync preparation
2519 my $corosync_rule = "-p udp
--dport
5404:5405";
2520 my $corosync_local_addresses = {};
2521 my $multicast_enabled;
2522 my $local_hostname = PVE::INotify::nodename();
2523 if (defined($corosync_conf)) {
2524 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2525 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2527 if ($node_name eq $local_hostname) {
2528 $corosync_local_addresses->{$key} = $node_ip;
2532 # allow multicast only if enabled in config
2533 my $corosync_transport = $corosync_conf->{main}->{totem}->{transport};
2534 $multicast_enabled = defined($corosync_transport) && $corosync_transport eq 'udp';
2537 # host inbound firewall
2538 my $chain = "PVEFW-HOST-IN
";
2539 ruleset_create_chain($ruleset, $chain);
2541 my $loglevel = get_option_log_level($options, "log_level_in
");
2543 ruleset_addrule($ruleset, $chain, "-i lo
", "-j ACCEPT
");
2545 ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2546 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2547 ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2549 # we use RETURN because we need to check also tap rules
2550 my $accept_action = 'RETURN';
2552 ruleset_addrule($ruleset, $chain, "-p igmp
", "-j
$accept_action"); # important for multicast
2554 # add host rules first, so that cluster wide rules can be overwritten
2555 foreach my $rule (@$rules, @$cluster_rules) {
2556 next if !$rule->{enable} || $rule->{errors};
2557 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2559 $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2562 $rule->{logmsg} = "$rule->{action
}: ";
2563 if ($rule->{type} eq 'group') {
2564 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2565 } elsif ($rule->{type} eq 'in') {
2566 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" });
2567 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2571 delete $rule->{iface_in};
2574 # allow standard traffic for management ipset (includes cluster network)
2575 my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management
", $ipversion);
2576 my $mngmntsrc = "-m set
--match-set
${mngmnt_ipset_chain
} src
";
2577 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
8006", "-j
$accept_action"); # PVE API
2578 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
5900:5999", "-j
$accept_action"); # PVE VNC Console
2579 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
3128", "-j
$accept_action"); # SPICE Proxy
2580 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
22", "-j
$accept_action"); # SSH
2581 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
60000:60050", "-j
$accept_action"); # Migration
2583 # corosync inbound rules
2584 if (defined($corosync_conf)) {
2585 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
$corosync_rule", "-j
$accept_action")
2586 if $multicast_enabled;
2588 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2589 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2590 my $destination = $corosync_local_addresses->{$key};
2592 if ($node_name ne $local_hostname && defined($destination)) {
2593 # accept only traffic on same ring
2594 ruleset_addrule($ruleset, $chain, "-d
$destination -s
$node_ip $corosync_rule", "-j
$accept_action");
2599 # implement input policy
2600 my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2601 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2603 # host outbound firewall
2604 $chain = "PVEFW-HOST-OUT
";
2605 ruleset_create_chain($ruleset, $chain);
2607 $loglevel = get_option_log_level($options, "log_level_out
");
2609 ruleset_addrule($ruleset, $chain, "-o lo
", "-j ACCEPT
");
2611 ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2613 # we use RETURN because we may want to check other thigs later
2614 $accept_action = 'RETURN';
2615 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j
$accept_action");
2617 ruleset_addrule($ruleset, $chain, "-p igmp
", "-j
$accept_action"); # important for multicast
2619 # add host rules first, so that cluster wide rules can be overwritten
2620 foreach my $rule (@$rules, @$cluster_rules) {
2621 next if !$rule->{enable} || $rule->{errors};
2622 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2624 $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2626 $rule->{logmsg} = "$rule->{action
}: ";
2627 if ($rule->{type} eq 'group') {
2628 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2629 } elsif ($rule->{type} eq 'out') {
2630 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" });
2631 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2635 delete $rule->{iface_out};
2638 # allow standard traffic on cluster network
2639 my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2640 my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2642 if ($localnet && ($ipversion == $localnet_ver)) {
2643 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
8006", "-j
$accept_action"); # PVE API
2644 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
22", "-j
$accept_action"); # SSH
2645 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
5900:5999", "-j
$accept_action"); # PVE VNC Console
2646 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
3128", "-j
$accept_action"); # SPICE Proxy
2649 # corosync outbound rules
2650 if (defined($corosync_conf)) {
2651 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
$corosync_rule", "-j
$accept_action")
2652 if $multicast_enabled;
2654 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2655 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2656 my $source = $corosync_local_addresses->{$key};
2658 if ($node_name ne $local_hostname && defined($source)) {
2659 # accept only traffic on same ring
2660 ruleset_addrule($ruleset, $chain, "-s
$source -d
$node_ip $corosync_rule", "-j
$accept_action");
2665 # implement output policy
2666 $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2667 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2669 ruleset_addrule($ruleset, "PVEFW-OUTPUT
", "", "-j PVEFW-HOST-OUT
");
2670 ruleset_addrule($ruleset, "PVEFW-INPUT
", "", "-j PVEFW-HOST-IN
");
2673 sub generate_group_rules {
2674 my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2676 my $rules = $cluster_conf->{groups}->{$group};
2679 warn "no such security group
'$group'\n";
2680 $rules = []; # create empty chain
2683 my $chain = "GROUP-
${group
}-IN
";
2685 ruleset_create_chain($ruleset, $chain);
2686 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2688 foreach my $rule (@$rules) {
2689 next if $rule->{type} ne 'in';
2690 next if !$rule->{enable} || $rule->{errors};
2691 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2692 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" });
2693 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2696 $chain = "GROUP-
${group
}-OUT
";
2698 ruleset_create_chain($ruleset, $chain);
2699 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2701 foreach my $rule (@$rules) {
2702 next if $rule->{type} ne 'out';
2703 next if !$rule->{enable} || $rule->{errors};
2704 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2705 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2706 # check also other tap rules later
2707 rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject
" });
2708 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2713 my $valid_netdev_names = {};
2714 for (my $i = 0; $i < $MAX_NETS; $i++) {
2715 $valid_netdev_names->{"net
$i"} = 1;
2718 sub get_mark_values {
2719 my ($value, $mask) = @_;
2720 $value = hex($value) if $value =~ /^0x/;
2721 $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2722 $mask = 0xffffffff if !defined($mask);
2723 return ($value, $mask);
2727 my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env) = @_;
2729 my $orig_line = $line;
2733 # we can add single line comments to the end of the rule
2734 if ($line =~ s/#\s*(.*?)\s*$//) {
2735 $rule->{comment} = decode('utf8', $1);
2738 # we can disable a rule when prefixed with '|'
2740 $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2742 $line =~ s/^(\S+)\s+(\S+)\s*// ||
2743 die "unable to parse rule
: $line\n";
2745 $rule->{type} = lc($1);
2746 $rule->{action} = $2;
2748 if ($rule->{type} eq 'in' || $rule->{type} eq 'out') {
2749 if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2750 $rule->{macro} = $1;
2751 $rule->{action} = $2;
2755 while (length($line)) {
2756 if ($line =~ s/^-i (\S+)\s*//) {
2757 $rule->{iface} = $1;
2761 last if $rule->{type} eq 'group';
2763 if ($line =~ s/^(?:-p|--?proto) (\S+)\s*//) {
2764 $rule->{proto} = $1;
2768 if ($line =~ s/^--?dport (\S+)\s*//) {
2769 $rule->{dport} = $1;
2773 if ($line =~ s/^--?sport (\S+)\s*//) {
2774 $rule->{sport} = $1;
2777 if ($line =~ s/^--?source (\S+)\s*//) {
2778 $rule->{source} = $1;
2781 if ($line =~ s/^--?dest (\S+)\s*//) {
2785 if ($line =~ s/^--?log (emerg|alert|crit|err|warning|notice|info|debug|nolog)\s*//) {
2789 if ($line =~ s/^--?icmp-type (\S+)\s*//) {
2790 $rule->{'icmp-type'} = $1;
2797 die "unable to parse rule parameters
: $line\n" if length($line);
2799 $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2800 if ($rule->{errors}) {
2801 # The verbose flag really means we're running from the CLI and want
2802 # output on the console - in the other case we really want such errors
2803 # to go into the syslog instead.
2804 my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2805 $log->("$prefix - errors
in rule parameters
: $orig_line\n");
2806 foreach my $p (keys %{$rule->{errors}}) {
2807 $log->(" $p: $rule->{errors
}->{$p}\n");
2814 sub verify_ethertype {
2816 my $types = get_etc_ethertypes();
2817 die "unknown ethernet protocol type
: $value\n"
2818 if !defined($types->{byname}->{$value}) &&
2819 !defined($types->{byid}->{$value});
2822 sub parse_vmfw_option {
2827 my $loglevels = "emerg
|alert
|crit
|err
|warning
|notice
|info
|debug
|nolog
";
2829 if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2832 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2834 $value = $2 ? lc($3) : '';
2835 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2838 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2841 } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
2844 verify_ethertype($_) foreach split(/\s*,\s*/, $value);
2846 die "can
't parse option '$line'\n"
2849 return ($opt, $value);
2852 sub parse_hostfw_option {
2857 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2859 if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid|protection_synflood):\s*(0|1)\s*$/i) {
2862 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2864 $value = $2 ? lc($3) : '';
2865 } elsif ($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*$/i) {
2869 die "can't parse option
'$line'\n"
2872 return ($opt, $value);
2875 sub parse_clusterfw_option {
2880 if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2883 if (($value > 1) && ((time() - $value) > 60)) {
2886 } elsif ($line =~ m/^(ebtables):\s*(0|1)\s*$/i) {
2889 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2892 } elsif ($line =~ m/^(log_ratelimit):\s*(\S+)\s*$/) {
2896 die "can
't parse option '$line'\n"
2899 return ($opt, $value);
2903 my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2905 my $alias = lc($cidr);
2906 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2907 $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2909 die "no such alias '$cidr'\n" if !$e;;
2911 return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2914 sub parse_ip_or_cidr {
2919 if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2922 } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2926 die "value does not look like a valid IP address or CIDR network\n";
2929 return wantarray ? ($cidr, $ipversion) : $cidr;
2935 # we can add single line comments to the end of the line
2936 my $comment = decode('utf8
', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2938 if ($line =~ m/^(\S+)\s(\S+)$/) {
2939 my ($name, $cidr) = ($1, $2);
2942 ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2947 ipversion => $ipversion,
2949 $data->{comment} = $comment if $comment;
2956 sub generic_fw_config_parser {
2957 my ($filename, $cluster_conf, $empty_conf, $rule_env) = @_;
2962 my $res = $empty_conf;
2965 if ($filename =~ m!^/etc/pve/(.*)$!) {
2966 $raw = PVE::Cluster::get_config($1);
2968 $raw = eval { PVE::Tools::file_get_contents($filename) }; # ignore errors
2972 my $curr_group_keys = {};
2975 while ($raw =~ /^\h*(.*?)\h*$/gm) {
2978 next if $line =~ m/^#/;
2979 next if $line =~ m/^\s*$/;
2982 my $prefix = "$filename (line $linenr)";
2984 if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2985 $section = 'options
';
2989 if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2990 $section = 'aliases
';
2994 if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2995 $section = 'groups
';
2999 die "security group name too long\n" if length($group) > $max_group_name_length;
3000 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
3003 ($section, $group, $comment) = undef;
3004 warn "$prefix: $err";
3008 $res->{$section}->{$group} = [];
3009 $res->{group_comments}->{$group} = decode('utf8
', $comment)
3014 if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
3019 if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
3024 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
3025 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
3028 ($section, $group, $comment) = undef;
3029 warn "$prefix: $err";
3033 $res->{$section}->{$group} = [];
3034 $curr_group_keys = {};
3036 $res->{ipset_comments}->{$group} = decode('utf8
', $comment)
3042 warn "$prefix: skip line - no section\n";
3046 if ($section eq 'options
') {
3049 if ($rule_env eq 'cluster
') {
3050 ($opt, $value) = parse_clusterfw_option($line);
3051 } elsif ($rule_env eq 'host
') {
3052 ($opt, $value) = parse_hostfw_option($line);
3054 ($opt, $value) = parse_vmfw_option($line);
3056 $res->{options}->{$opt} = $value;
3058 warn "$prefix: $@" if $@;
3059 } elsif ($section eq 'aliases
') {
3061 my $data = parse_alias($line);
3062 $res->{aliases}->{lc($data->{name})} = $data;
3064 warn "$prefix: $@" if $@;
3065 } elsif ($section eq 'rules
') {
3067 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env); };
3069 warn "$prefix: $err";
3072 push @{$res->{$section}}, $rule;
3073 } elsif ($section eq 'groups
') {
3075 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group
'); };
3077 warn "$prefix: $err";
3080 push @{$res->{$section}->{$group}}, $rule;
3081 } elsif ($section eq 'ipset
') {
3082 # we can add single line comments to the end of the rule
3083 my $comment = decode('utf8
', $1) if $line =~ s/#\s*(.*?)\s*$//;
3085 $line =~ m/^(\!)?\s*(\S+)\s*$/;
3090 if ($nomatch && !$feature_ipset_nomatch) {
3091 $errors->{nomatch} = "nomatch not supported by kernel";
3095 if ($cidr =~ m/^${ip_alias_pattern}$/) {
3096 resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
3098 $cidr = parse_ip_or_cidr($cidr);
3100 die "duplicate ipset entry for '$cidr'\n"
3101 if defined($curr_group_keys->{$cidr});
3105 $errors->{cidr} = $err;
3108 if ($cidr =~ m!/0+$!) {
3109 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
3112 my $entry = { cidr => $cidr };
3113 $entry->{nomatch} = 1 if $nomatch;
3114 $entry->{comment} = $comment if $comment;
3115 $entry->{errors} = $errors if $errors;
3117 if ($verbose && $errors) {
3118 warn "$prefix - errors in ipset '$group': $line\n";
3119 foreach my $p (keys %{$errors}) {
3120 warn " $p: $errors->{$p}\n";
3124 push @{$res->{$section}->{$group}}, $entry;
3125 $curr_group_keys->{$cidr} = 1;
3127 warn "$prefix: skip line - unknown section\n";
3135 # this is only used to prevent concurrent runs of rule compilation/application
3136 # see lock_*_conf for cfs locks protectiong config modification
3138 my ($code, @param) = @_;
3142 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
3149 sub read_local_vm_config {
3154 my $vmdata = { qemu => $qemu, lxc => $lxc };
3156 my $vmlist = PVE::Cluster::get_vmlist();
3157 return $vmdata if !$vmlist || !$vmlist->{ids};
3158 my $ids = $vmlist->{ids};
3160 foreach my $vmid (keys %$ids) {
3161 next if !$vmid; # skip VE0
3162 my $d = $ids->{$vmid};
3163 next if !$d->{node} || $d->{node} ne $nodename;
3164 next if !$d->{type};
3165 if ($d->{type} eq 'qemu
') {
3166 if ($have_qemu_server) {
3167 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
3168 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3169 $qemu->{$vmid} = $conf;
3172 } elsif ($d->{type} eq 'lxc
') {
3174 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
3175 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3176 $lxc->{$vmid} = $conf;
3185 sub lock_vmfw_conf {
3186 my ($vmid, $timeout, $code, @param) = @_;
3188 die "can't
lock VM firewall config
for undefined VMID
\n"
3191 my $res = PVE::Cluster::cfs_lock_firewall("vm-
$vmid", $timeout, $code, @param);
3197 sub load_vmfw_conf {
3198 my ($cluster_conf, $rule_env, $vmid, $dir) = @_;
3200 $dir = $pvefw_conf_dir if !defined($dir);
3201 my $filename = "$dir/$vmid.fw
";
3208 ipset_comments => {},
3211 my $vmfw_conf = generic_fw_config_parser($filename, $cluster_conf, $empty_conf, $rule_env);
3212 $vmfw_conf->{vmid} = $vmid;
3217 my $format_rules = sub {
3218 my ($rules, $allow_iface) = @_;
3222 foreach my $rule (@$rules) {
3223 if ($rule->{type} eq 'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
3224 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
3225 $raw .= uc($rule->{type});
3226 if ($rule->{macro}) {
3227 $raw .= " $rule->{macro}($rule->{action
})";
3229 $raw .= " " . $rule->{action};
3231 if ($allow_iface && $rule->{iface}) {
3232 $raw .= " -i
$rule->{iface
}";
3235 if ($rule->{type} ne 'group') {
3236 $raw .= " -source
$rule->{source
}" if $rule->{source};
3237 $raw .= " -dest
$rule->{dest
}" if $rule->{dest};
3238 $raw .= " -p
$rule->{proto
}" if $rule->{proto};
3239 $raw .= " -dport
$rule->{dport
}" if $rule->{dport};
3240 $raw .= " -sport
$rule->{sport
}" if $rule->{sport};
3241 $raw .= " -log $rule->{log}" if $rule->{log};
3242 $raw .= " -icmp-type
$rule->{'icmp-type'}" if defined($rule->{'icmp-type'}) && $rule->{'icmp-type'} ne '';
3245 $raw .= " # " . encode('utf8', $rule->{comment})
3246 if $rule->{comment
} && $rule->{comment
} !~ m/^\s*$/;
3249 die "unknown rule type '$rule->{type}'";
3256 my $format_options = sub {
3261 $raw .= "[OPTIONS]\n\n";
3262 foreach my $opt (keys %$options) {
3263 $raw .= "$opt: $options->{$opt}\n";
3270 my $format_aliases = sub {
3275 $raw .= "[ALIASES]\n\n";
3276 foreach my $k (keys %$aliases) {
3277 my $e = $aliases->{$k};
3278 $raw .= "$e->{name} $e->{cidr}";
3279 $raw .= " # " . encode
('utf8', $e->{comment
})
3280 if $e->{comment
} && $e->{comment
} !~ m/^\s*$/;
3288 my $format_ipsets = sub {
3293 foreach my $ipset (sort keys %{$fw_conf->{ipset
}}) {
3294 if (my $comment = $fw_conf->{ipset_comments
}->{$ipset}) {
3295 my $utf8comment = encode
('utf8', $comment);
3296 $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3298 $raw .= "[IPSET $ipset]\n\n";
3300 my $options = $fw_conf->{ipset
}->{$ipset};
3303 foreach my $entry (@$options) {
3304 my $cidr = $entry->{cidr
};
3305 if (defined($nethash->{$cidr})) {
3306 warn "ignoring duplicate ipset entry '$cidr'\n";
3310 $nethash->{$cidr} = $entry;
3313 foreach my $cidr (sort keys %$nethash) {
3314 my $entry = $nethash->{$cidr};
3315 my $line = $entry->{nomatch
} ?
'!' : '';
3316 $line .= $entry->{cidr
};
3317 $line .= " # " . encode
('utf8', $entry->{comment
})
3318 if $entry->{comment
} && $entry->{comment
} !~ m/^\s*$/;
3328 sub save_vmfw_conf
{
3329 my ($vmid, $vmfw_conf) = @_;
3333 my $options = $vmfw_conf->{options
};
3334 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3336 my $aliases = $vmfw_conf->{aliases
};
3337 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3339 $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset
};
3341 my $rules = $vmfw_conf->{rules
} || [];
3342 if ($rules && scalar(@$rules)) {
3343 $raw .= "[RULES]\n\n";
3344 $raw .= &$format_rules($rules, 1);
3348 my $filename = "$pvefw_conf_dir/$vmid.fw";
3350 mkdir $pvefw_conf_dir;
3351 PVE
::Tools
::file_set_contents
($filename, $raw);
3357 # FIXME: remove with 8.0 and break older qemu-server/pve-container
3358 sub remove_vmfw_conf
{
3359 return PVE
::Firewall
::Helpers
::remove_vmfw_conf
(@_);
3362 # FIXME: remove with 8.0 and break older qemu-server/pve-container
3363 sub clone_vmfw_conf
{
3364 return PVE
::Firewall
::Helpers
::clone_vmfw_conf
(@_);
3367 sub read_vm_firewall_configs
{
3368 my ($cluster_conf, $vmdata, $dir) = @_;
3370 my $vmfw_configs = {};
3372 foreach my $vmid (keys %{$vmdata->{qemu
}}) {
3373 my $vmfw_conf = load_vmfw_conf
($cluster_conf, 'vm', $vmid, $dir);
3374 next if !$vmfw_conf->{options
}; # skip if file does not exist
3375 $vmfw_configs->{$vmid} = $vmfw_conf;
3377 foreach my $vmid (keys %{$vmdata->{lxc
}}) {
3378 my $vmfw_conf = load_vmfw_conf
($cluster_conf, 'ct', $vmid, $dir);
3379 next if !$vmfw_conf->{options
}; # skip if file does not exist
3380 $vmfw_configs->{$vmid} = $vmfw_conf;
3383 return $vmfw_configs;
3386 sub get_option_log_level
{
3387 my ($options, $k) = @_;
3389 my $v = $options->{$k};
3390 $v = $default_log_level if !defined($v);
3392 return undef if $v eq '' || $v eq 'nolog';
3394 return $v if defined($log_level_hash->{$v});
3396 warn "unknown log level ($k = '$v')\n";
3401 sub generate_std_chains
{
3402 my ($ruleset, $options, $ipversion) = @_;
3404 my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3406 my $loglevel = get_option_log_level
($options, 'smurf_log_level');
3407 my $chain = 'PVEFW-smurflog';
3408 if ( $std_chains->{$chain} ) {
3409 foreach my $r (@{$std_chains->{$chain}}) {
3410 $r->{log} = $loglevel;
3414 # same as shorewall logflags action.
3415 $loglevel = get_option_log_level
($options, 'tcp_flags_log_level');
3416 $chain = 'PVEFW-logflags';
3417 if ( $std_chains->{$chain} ) {
3418 foreach my $r (@{$std_chains->{$chain}}) {
3419 $r->{log} = $loglevel;
3423 foreach my $chain (keys %$std_chains) {
3424 ruleset_create_chain
($ruleset, $chain);
3425 foreach my $rule (@{$std_chains->{$chain}}) {
3427 ruleset_generate_rule
($ruleset, $chain, $ipversion, $rule, 0);
3429 die "rule $rule as string - should not happen";
3435 sub generate_ipset_chains
{
3436 my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3438 foreach my $ipset (keys %{$ipsets}) {
3440 my $options = $ipsets->{$ipset};
3442 if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3443 if (my $ips = $device_ips->{$1}) {
3444 $options = [@$options, @$ips];
3450 foreach my $entry (@$options) {
3451 next if $entry->{errors
}; # skip entries with errors
3454 if ($entry->{cidr
} =~ m/^${ip_alias_pattern}$/) {
3455 ($cidr, $ver) = resolve_alias
($clusterfw_conf, $fw_conf, $entry->{cidr
});
3457 ($cidr, $ver) = parse_ip_or_cidr
($entry->{cidr
});
3459 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3461 # ip_compress_address takes an address only, no CIDR
3462 my ($addr, $prefix_len) = ($cidr =~ m
@^([^/]*)(/.*)?
$@);
3463 $cidr = lc(Net
::IP
::ip_compress_address
($addr, 6));
3464 $cidr .= $prefix_len if defined($prefix_len);
3470 $nethash->{$ver}->{$cidr} = { cidr
=> $cidr, nomatch
=> $entry->{nomatch
} };
3475 foreach my $ipversion (4, 6) {
3476 my $data = $nethash->{$ipversion};
3478 my $name = compute_ipset_chain_name
($fw_conf->{vmid
}, $ipset, $ipversion);
3480 my $hashsize = scalar(@$options);
3481 if ($hashsize <= 64) {
3484 $hashsize = round_powerof2
($hashsize);
3487 my $bucketsize = 12; # lower than the default of 14, faster but slightly more memory use
3489 my $family = $ipversion == "6" ?
"inet6" : "inet";
3491 $ipset_ruleset->{$name} = [
3492 "create $name hash:net family $family hashsize $hashsize maxelem $hashsize bucketsize $bucketsize"
3495 foreach my $cidr (sort keys %$data) {
3496 my $entry = $data->{$cidr};
3498 my $cmd = "add $name $cidr";
3499 if ($entry->{nomatch
}) {
3500 if ($feature_ipset_nomatch) {
3501 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3503 warn "ignore !$cidr - nomatch not supported by kernel\n";
3506 push @{$ipset_ruleset->{$name}}, $cmd;
3513 sub round_powerof2
{
3517 $int |= $int >> $_ foreach (1,2,4,8,16);
3521 my $set_global_log_ratelimit = sub {
3522 my $cluster_opts = shift;
3524 $global_log_ratelimit = '--limit 1/sec';
3525 if (defined(my $log_rlimit = $cluster_opts->{log_ratelimit
})) {
3526 my $ll_format = $cluster_option_properties->{log_ratelimit
}->{format
};
3527 my $limit = PVE
::JSONSchema
::parse_property_string
($ll_format, $log_rlimit);
3529 if ($limit->{enable
}) {
3530 if (my $rate = $limit->{rate
}) {
3531 $global_log_ratelimit = "--limit $rate";
3533 if (my $burst = $limit->{burst
}) {
3534 $global_log_ratelimit .= " --limit-burst $burst";
3537 $global_log_ratelimit = undef;
3542 sub lock_clusterfw_conf
{
3543 my ($timeout, $code, @param) = @_;
3545 my $res = PVE
::Cluster
::cfs_lock_firewall
("cluster", $timeout, $code, @param);
3551 sub load_clusterfw_conf
{
3552 my ($filename) = @_;
3554 $filename = $clusterfw_conf_filename if !defined($filename);
3560 group_comments
=> {},
3562 ipset_comments
=> {},
3565 my $cluster_conf = generic_fw_config_parser
($filename, $empty_conf, $empty_conf, 'cluster');
3566 $set_global_log_ratelimit->($cluster_conf->{options
});
3568 return $cluster_conf;
3571 sub save_clusterfw_conf
{
3572 my ($cluster_conf) = @_;
3576 my $options = $cluster_conf->{options
};
3577 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3579 my $aliases = $cluster_conf->{aliases
};
3580 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3582 $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset
};
3584 my $rules = $cluster_conf->{rules
};
3585 if ($rules && scalar(@$rules)) {
3586 $raw .= "[RULES]\n\n";
3587 $raw .= &$format_rules($rules, 1);
3591 if ($cluster_conf->{groups
}) {
3592 foreach my $group (sort keys %{$cluster_conf->{groups
}}) {
3593 my $rules = $cluster_conf->{groups
}->{$group};
3594 if (my $comment = $cluster_conf->{group_comments
}->{$group}) {
3595 my $utf8comment = encode
('utf8', $comment);
3596 $raw .= "[group $group] # $utf8comment\n\n";
3598 $raw .= "[group $group]\n\n";
3601 $raw .= &$format_rules($rules, 0);
3607 mkdir $pvefw_conf_dir;
3608 PVE
::Tools
::file_set_contents
($clusterfw_conf_filename, $raw);
3610 unlink $clusterfw_conf_filename;
3614 sub lock_hostfw_conf
: prototype($$$@) {
3615 my ($node, $timeout, $code, @param) = @_;
3617 $node = $nodename if !defined($node);
3619 my $res = PVE
::Cluster
::cfs_lock_firewall
("host-$node", $timeout, $code, @param);
3625 sub load_hostfw_conf
{
3626 my ($cluster_conf, $filename) = @_;
3628 $filename = $hostfw_conf_filename if !defined($filename);
3630 my $empty_conf = { rules
=> [], options
=> {}};
3631 return generic_fw_config_parser
($filename, $cluster_conf, $empty_conf, 'host');
3634 sub save_hostfw_conf
{
3635 my ($hostfw_conf, $filename) = @_;
3637 $filename = $hostfw_conf_filename if !defined($filename);
3641 my $options = $hostfw_conf->{options
};
3642 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3644 my $rules = $hostfw_conf->{rules
};
3645 if ($rules && scalar(@$rules)) {
3646 $raw .= "[RULES]\n\n";
3647 $raw .= &$format_rules($rules, 1);
3652 PVE
::Tools
::file_set_contents
($filename, $raw);
3659 my ($cluster_conf, $hostfw_conf, $vmdata, $corosync_conf) = @_;
3663 # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3664 $pve_std_chains = dclone
($pve_std_chains_conf);
3666 if ($vmdata) { # test mode
3667 my $testdir = $vmdata->{testdir
} || die "no test directory specified";
3668 my $filename = "$testdir/cluster.fw";
3669 $cluster_conf = load_clusterfw_conf
($filename);
3671 $filename = "$testdir/host.fw";
3672 $hostfw_conf = load_hostfw_conf
($cluster_conf, $filename);
3674 $vmfw_configs = read_vm_firewall_configs
($cluster_conf, $vmdata, $testdir);
3675 } else { # normal operation
3676 $cluster_conf = load_clusterfw_conf
(undef) if !$cluster_conf;
3678 $hostfw_conf = load_hostfw_conf
($cluster_conf, undef) if !$hostfw_conf;
3680 # cfs_update is handled by daemon or API
3681 $corosync_conf = PVE
::Cluster
::cfs_read_file
("corosync.conf")
3682 if !defined($corosync_conf) && PVE
::Corosync
::check_conf_exists
(1);
3684 $vmdata = read_local_vm_config
();
3685 $vmfw_configs = read_vm_firewall_configs
($cluster_conf, $vmdata, undef);
3688 return ({},{},{},{}) if !$cluster_conf->{options
}->{enable
};
3691 if ($cluster_conf->{aliases
}->{local_network
}) {
3692 $localnet = $cluster_conf->{aliases
}->{local_network
}->{cidr
};
3695 ($localnet, $localnet_ver) = parse_ip_or_cidr
(local_network
() || '127.0.0.0/8');
3697 $cluster_conf->{aliases
}->{local_network
} = {
3698 name
=> 'local_network', cidr
=> $localnet, ipversion
=> $localnet_ver };
3701 push @{$cluster_conf->{ipset
}->{management
}}, { cidr
=> $localnet };
3705 $ruleset->{filter
} = compile_iptables_filter
($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3706 $ruleset->{raw
} = compile_iptables_raw
($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3707 $rulesetv6->{filter
} = compile_iptables_filter
($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
3708 $rulesetv6->{raw
} = compile_iptables_raw
($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
3709 my $ebtables_ruleset = compile_ebtables_filter
($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata);
3710 my $ipset_ruleset = compile_ipsets
($cluster_conf, $vmfw_configs, $vmdata);
3712 return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
3715 sub compile_iptables_raw
{
3716 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
3720 my $hostfw_options = $hostfw_conf->{options
} || {};
3721 my $protection_synflood = $hostfw_options->{protection_synflood
} || 0;
3723 if($protection_synflood) {
3725 my $protection_synflood_rate = $hostfw_options->{protection_synflood_rate
} ?
$hostfw_options->{protection_synflood_rate
} : 200;
3726 my $protection_synflood_burst = $hostfw_options->{protection_synflood_burst
} ?
$hostfw_options->{protection_synflood_burst
} : 1000;
3727 my $protection_synflood_limit = $hostfw_options->{protection_synflood_limit
} ?
$hostfw_options->{protection_synflood_limit
} : 3000;
3728 my $protection_synflood_expire = $hostfw_options->{nf_conntrack_tcp_timeout_syn_recv
} ?
$hostfw_options->{nf_conntrack_tcp_timeout_syn_recv
} : 60;
3729 $protection_synflood_expire = $protection_synflood_expire * 1000;
3730 my $protection_synflood_mask = $ipversion == 4 ?
32 : 64;
3732 ruleset_create_chain
($ruleset, "PVEFW-PREROUTING");
3733 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 $protection_synflood_expire", "-j DROP");
3739 sub compile_iptables_filter
{
3740 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
3744 ruleset_create_chain
($ruleset, "PVEFW-INPUT");
3745 ruleset_create_chain
($ruleset, "PVEFW-OUTPUT");
3747 ruleset_create_chain
($ruleset, "PVEFW-FORWARD");
3749 my $hostfw_options = $hostfw_conf->{options
} || {};
3751 # fixme: what log level should we use here?
3752 my $loglevel = get_option_log_level
($hostfw_options, "log_level_out");
3754 my $conn_allow_invalid = $hostfw_options->{nf_conntrack_allow_invalid
} // 0;
3755 ruleset_chain_add_conn_filters
($ruleset, "PVEFW-FORWARD", $conn_allow_invalid, "ACCEPT");
3757 ruleset_create_chain
($ruleset, "PVEFW-FWBR-IN");
3758 ruleset_chain_add_input_filters
($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3760 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3762 ruleset_create_chain
($ruleset, "PVEFW-FWBR-OUT");
3763 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3765 generate_std_chains
($ruleset, $hostfw_options, $ipversion);
3767 my $hostfw_enable = !(defined($hostfw_options->{enable
}) && ($hostfw_options->{enable
} == 0));
3769 if ($hostfw_enable) {
3770 eval { enable_host_firewall
($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf); };
3771 warn $@ if $@; # just to be sure - should not happen
3774 # generate firewall rules for QEMU VMs
3775 foreach my $vmid (sort keys %{$vmdata->{qemu
}}) {
3777 my $conf = $vmdata->{qemu
}->{$vmid};
3778 my $vmfw_conf = $vmfw_configs->{$vmid};
3779 return if !$vmfw_conf || !$vmfw_conf->{options
}->{enable
};
3781 foreach my $netid (sort keys %$conf) {
3782 next if $netid !~ m/^net(\d+)$/;
3783 my $net = PVE
::QemuServer
::parse_net
($conf->{$netid});
3784 next if !$net->{firewall
};
3786 my $iface = "tap${vmid}i$1";
3787 my $macaddr = $net->{macaddr
};
3788 generate_tap_rules_direction
($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3789 $vmfw_conf, $vmid, 'IN', $ipversion);
3790 generate_tap_rules_direction
($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3791 $vmfw_conf, $vmid, 'OUT', $ipversion);
3794 warn $@ if $@; # just to be sure - should not happen
3797 # generate firewall rules for LXC containers
3798 foreach my $vmid (sort keys %{$vmdata->{lxc
}}) {
3800 my $conf = $vmdata->{lxc
}->{$vmid};
3801 my $vmfw_conf = $vmfw_configs->{$vmid};
3802 return if !$vmfw_conf || !$vmfw_conf->{options
}->{enable
};
3804 foreach my $netid (sort keys %$conf) {
3805 next if $netid !~ m/^net(\d+)$/;
3806 my $net = PVE
::LXC
::Config-
>parse_lxc_network($conf->{$netid});
3807 next if !$net->{firewall
};
3809 my $iface = "veth${vmid}i$1";
3810 my $macaddr = $net->{hwaddr
};
3811 generate_tap_rules_direction
($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3812 $vmfw_conf, $vmid, 'IN', $ipversion);
3813 generate_tap_rules_direction
($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3814 $vmfw_conf, $vmid, 'OUT', $ipversion);
3817 warn $@ if $@; # just to be sure - should not happen
3820 if (ruleset_chain_exist
($ruleset, "PVEFW-IPS")){
3821 ruleset_insertrule
($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3827 sub mac_to_linklocal
{
3829 my @parts = split(/:/, $macaddr);
3830 # The standard link local address uses the fe80::/64 prefix with the
3831 # modified EUI-64 identifier derived from the MAC address by flipping the
3832 # universal/local bit and inserting FF:FE in the middle.
3834 $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3835 my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3836 return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3839 sub compile_ipsets
{
3840 my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3843 if ($cluster_conf->{aliases
}->{local_network
}) {
3844 $localnet = $cluster_conf->{aliases
}->{local_network
}->{cidr
};
3847 ($localnet, $localnet_ver) = parse_ip_or_cidr
(local_network
() || '127.0.0.0/8');
3849 $cluster_conf->{aliases
}->{local_network
} = {
3850 name
=> 'local_network', cidr
=> $localnet, ipversion
=> $localnet_ver };
3853 push @{$cluster_conf->{ipset
}->{management
}}, { cidr
=> $localnet };
3856 my $ipset_ruleset = {};
3858 # generate ipsets for QEMU VMs
3859 foreach my $vmid (keys %{$vmdata->{qemu
}}) {
3861 my $conf = $vmdata->{qemu
}->{$vmid};
3862 my $vmfw_conf = $vmfw_configs->{$vmid};
3863 return if !$vmfw_conf;
3865 # When the 'ipfilter' option is enabled every device for which there
3866 # is no 'ipfilter-netX' ipset defined gets an implicit empty default
3868 # The reason is that ipfilter ipsets are always filled with standard
3869 # IPv6 link-local filters.
3870 my $ipsets = $vmfw_conf->{ipset
};
3871 my $implicit_sets = {};
3873 my $device_ips = {};
3874 foreach my $netid (keys %$conf) {
3875 next if $netid !~ m/^net(\d+)$/;
3876 my $net = PVE
::QemuServer
::parse_net
($conf->{$netid});
3877 next if !$net->{firewall
};
3879 if ($vmfw_conf->{options
}->{ipfilter
} && !$ipsets->{"ipfilter-$netid"}) {
3880 $implicit_sets->{"ipfilter-$netid"} = [];
3883 my $macaddr = $net->{macaddr
};
3884 my $linklocal = mac_to_linklocal
($macaddr);
3885 $device_ips->{$netid} = [
3886 { cidr
=> $linklocal },
3887 { cidr
=> 'fe80::/10', nomatch
=> 1 }
3891 generate_ipset_chains
($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3892 generate_ipset_chains
($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3894 warn $@ if $@; # just to be sure - should not happen
3897 # generate firewall rules for LXC containers
3898 foreach my $vmid (keys %{$vmdata->{lxc
}}) {
3900 my $conf = $vmdata->{lxc
}->{$vmid};
3901 my $vmfw_conf = $vmfw_configs->{$vmid};
3902 return if !$vmfw_conf;
3904 # When the 'ipfilter' option is enabled every device for which there
3905 # is no 'ipfilter-netX' ipset defined gets an implicit empty default
3907 # The reason is that ipfilter ipsets are always filled with standard
3908 # IPv6 link-local filters, as well as the IP addresses configured
3909 # for the container.
3910 my $ipsets = $vmfw_conf->{ipset
};
3911 my $implicit_sets = {};
3913 my $device_ips = {};
3914 foreach my $netid (keys %$conf) {
3915 next if $netid !~ m/^net(\d+)$/;
3916 my $net = PVE
::LXC
::Config-
>parse_lxc_network($conf->{$netid});
3917 next if !$net->{firewall
};
3919 if ($vmfw_conf->{options
}->{ipfilter
} && !$ipsets->{"ipfilter-$netid"}) {
3920 $implicit_sets->{"ipfilter-$netid"} = [];
3923 my $macaddr = $net->{hwaddr
};
3924 my $linklocal = mac_to_linklocal
($macaddr);
3925 my $set = $device_ips->{$netid} = [
3926 { cidr
=> $linklocal },
3927 { cidr
=> 'fe80::/10', nomatch
=> 1 }
3929 if (defined($net->{ip
}) && $net->{ip
} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3930 push @$set, { cidr
=> $1 };
3932 if (defined($net->{ip6
}) && $net->{ip6
} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3933 push @$set, { cidr
=> $1 };
3937 generate_ipset_chains
($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3938 generate_ipset_chains
($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3940 warn $@ if $@; # just to be sure - should not happen
3943 generate_ipset_chains
($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset
});
3945 return $ipset_ruleset;
3948 sub compile_ebtables_filter
{
3949 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata) = @_;
3951 if (!($cluster_conf->{options
}->{ebtables
} // 1)) {
3957 ruleset_create_chain
($ruleset, "PVEFW-FORWARD");
3959 ruleset_create_chain
($ruleset, "PVEFW-FWBR-OUT");
3960 #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED', to speedup rules
3961 ruleset_addrule
($ruleset, 'PVEFW-FORWARD', '-p IPv4', '-j ACCEPT');
3962 ruleset_addrule
($ruleset, 'PVEFW-FORWARD', '-p IPv6', '-j ACCEPT');
3963 ruleset_addrule
($ruleset, 'PVEFW-FORWARD', '-o fwln+', '-j PVEFW-FWBR-OUT');
3965 # generate firewall rules for QEMU VMs
3966 foreach my $vmid (sort keys %{$vmdata->{qemu
}}) {
3968 my $conf = $vmdata->{qemu
}->{$vmid};
3969 my $vmfw_conf = $vmfw_configs->{$vmid};
3970 return if !$vmfw_conf || !$vmfw_conf->{options
}->{enable
};
3971 my $ipsets = $vmfw_conf->{ipset
};
3973 foreach my $netid (sort keys %$conf) {
3974 next if $netid !~ m/^net(\d+)$/;
3975 my $net = PVE
::QemuServer
::parse_net
($conf->{$netid});
3976 next if !$net->{firewall
};
3977 my $iface = "tap${vmid}i$1";
3978 my $macaddr = $net->{macaddr
};
3980 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3981 foreach my $ipaddr (@$ipset) {
3982 my($ip, $version) = parse_ip_or_cidr
($ipaddr->{cidr
});
3983 next if !$ip || ($version && $version != 4);
3984 push(@$arpfilter, $ip);
3987 generate_tap_layer2filter
($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3990 warn $@ if $@; # just to be sure - should not happen
3993 # generate firewall rules for LXC containers
3994 foreach my $vmid (sort keys %{$vmdata->{lxc
}}) {
3996 my $conf = $vmdata->{lxc
}->{$vmid};
3998 my $vmfw_conf = $vmfw_configs->{$vmid};
3999 return if !$vmfw_conf || !$vmfw_conf->{options
}->{enable
};
4000 my $ipsets = $vmfw_conf->{ipset
};
4002 foreach my $netid (sort keys %$conf) {
4003 next if $netid !~ m/^net(\d+)$/;
4004 my $net = PVE
::LXC
::Config-
>parse_lxc_network($conf->{$netid});
4005 next if !$net->{firewall
};
4006 my $iface = "veth${vmid}i$1";
4007 my $macaddr = $net->{hwaddr
};
4009 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
4010 foreach my $ipaddr (@$ipset) {
4011 my($ip, $version) = parse_ip_or_cidr
($ipaddr->{cidr
});
4012 next if !$ip || ($version && $version != 4);
4013 push(@$arpfilter, $ip);
4016 if (defined(my $ip = $net->{ip
}) && $vmfw_conf->{options
}->{ipfilter
}) {
4017 # ebtables changes this to a .0/MASK network but we just
4018 # want the address here, no network - see #2193
4020 if ($ip ne 'dhcp') {
4021 push @$arpfilter, $ip;
4024 generate_tap_layer2filter
($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
4027 warn $@ if $@; # just to be sure - should not happen
4033 sub generate_tap_layer2filter
{
4034 my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter) = @_;
4035 my $options = $vmfw_conf->{options
};
4037 my $tapchain = $iface."-OUT";
4039 # ebtables remove zeros from mac pairs
4040 $macaddr =~ s/0([0-9a-f])/$1/ig;
4041 $macaddr = lc($macaddr);
4043 ruleset_create_chain
($ruleset, $tapchain);
4045 if (defined($macaddr) && !(defined($options->{macfilter
}) && $options->{macfilter
} == 0)) {
4046 ruleset_addrule
($ruleset, $tapchain, "-s ! $macaddr", '-j DROP');
4050 my $arpchain = $tapchain."-ARP";
4051 ruleset_addrule
($ruleset, $tapchain, "-p ARP", "-j $arpchain");
4052 ruleset_create_chain
($ruleset, $arpchain);
4054 foreach my $ip (@{$arpfilter}) {
4055 ruleset_addrule
($ruleset, $arpchain, "-p ARP --arp-ip-src $ip", '-j RETURN');
4057 ruleset_addrule
($ruleset, $arpchain, '', '-j DROP');
4060 if (defined($options->{layer2_protocols
})){
4061 my $protochain = $tapchain."-PROTO";
4062 ruleset_addrule
($ruleset, $tapchain, '', "-j $protochain");
4063 ruleset_create_chain
($ruleset, $protochain);
4065 foreach my $proto (split(/,/, $options->{layer2_protocols
})) {
4066 ruleset_addrule
($ruleset, $protochain, "-p $proto", '-j RETURN');
4068 ruleset_addrule
($ruleset, $protochain, '', '-j DROP');
4071 ruleset_addrule
($ruleset, $tapchain, '', '-j ACCEPT');
4073 ruleset_addrule
($ruleset, 'PVEFW-FWBR-OUT', "-i $iface", "-j $tapchain");
4076 # the parameter $change_only_regex changes two things if defined:
4077 # * all chains not matching it will be left intact
4078 # * both the $active_chains hash and the returned status_hash have different
4079 # structure (they contain a key named 'rules').
4080 sub get_ruleset_status
{
4081 my ($ruleset, $active_chains, $digest_fn, $change_only_regex) = @_;
4083 my $statushash = {};
4085 foreach my $chain (sort keys %$ruleset) {
4086 my $rules = $ruleset->{$chain};
4087 my $sig = &$digest_fn($rules);
4090 $statushash->{$chain}->{sig
} = $sig;
4091 if (defined($change_only_regex)) {
4092 $oldsig = $active_chains->{$chain}->{sig
};
4093 $statushash->{$chain}->{rules
} = $rules;
4095 $oldsig = $active_chains->{$chain};
4097 if (!defined($oldsig)) {
4098 $statushash->{$chain}->{action
} = 'create';
4100 if ($oldsig eq $sig) {
4101 $statushash->{$chain}->{action
} = 'exists';
4103 $statushash->{$chain}->{action
} = 'update';
4107 print "$statushash->{$chain}->{action} $chain ($sig)\n";
4108 foreach my $cmd (@{$rules}) {
4114 foreach my $chain (sort keys %$active_chains) {
4115 next if defined($ruleset->{$chain});
4116 my $action = 'delete';
4117 my $sig = $active_chains->{$chain};
4118 if (defined($change_only_regex)) {
4119 $action = 'ignore' if ($chain !~ m/$change_only_regex/);
4120 $statushash->{$chain}->{rules
} = $active_chains->{$chain}->{rules
};
4121 $statushash->{$chain}->{policy
} = $active_chains->{$chain}->{policy
};
4124 $statushash->{$chain}->{action
} = $action;
4125 $statushash->{$chain}->{sig
} = $sig;
4126 print "$action $chain ($sig)\n" if $verbose;
4132 sub print_sig_rule
{
4133 my ($chain, $sig) = @_;
4135 # We just use this to store a SHA1 checksum used to detect changes
4136 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
4139 sub get_ruleset_cmdlist {
4140 my ($ruleset, $iptablescmd, $table) = @_;
4142 $table = 'filter' if !$table;
4144 my $cmdlist = "*$table\n"; # we pass this to iptables-restore;
4146 my ($active_chains, $hooks) = iptables_get_chains($iptablescmd, $table);
4147 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
4149 # create missing chains first
4150 foreach my $chain (sort keys %$ruleset) {
4151 my $stat = $statushash->{$chain};
4152 die "internal error
" if !$stat;
4153 next if $stat->{action} ne 'create';
4155 $cmdlist .= ":$chain - [0:0]\n";
4158 foreach my $h (qw(INPUT OUTPUT FORWARD PREROUTING)) {
4159 my $chain = "PVEFW-$h";
4160 if ($ruleset->{$chain} && !$hooks->{$h}) {
4161 $cmdlist .= "-A $h -j $chain\n";
4165 foreach my $chain (sort keys %$ruleset) {
4166 my $stat = $statushash->{$chain};
4167 die "internal error" if !$stat;
4169 if ($stat->{action
} eq 'update' || $stat->{action
} eq 'create') {
4170 $cmdlist .= "-F $chain\n";
4171 foreach my $cmd (@{$ruleset->{$chain}}) {
4172 $cmdlist .= "$cmd\n";
4174 $cmdlist .= print_sig_rule
($chain, $stat->{sig
});
4175 } elsif ($stat->{action
} eq 'delete') {
4176 die "internal error"; # this should not happen
4177 } elsif ($stat->{action
} eq 'exists') {
4180 die "internal error - unknown status '$stat->{action}'";
4184 foreach my $chain (keys %$statushash) {
4185 next if $statushash->{$chain}->{action
} ne 'delete';
4186 $cmdlist .= "-F $chain\n";
4188 foreach my $chain (keys %$statushash) {
4189 next if $statushash->{$chain}->{action
} ne 'delete';
4190 next if $chain eq 'PVEFW-INPUT';
4191 next if $chain eq 'PVEFW-OUTPUT';
4192 next if $chain eq 'PVEFW-FORWARD';
4193 next if $chain eq 'PVEFW-PREROUTING';
4194 $cmdlist .= "-X $chain\n";
4197 my $changes = $cmdlist ne "*$table\n" ?
1 : 0;
4199 $cmdlist .= "COMMIT\n";
4201 return wantarray ?
($cmdlist, $changes) : $cmdlist;
4204 my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tap|veth)\d+i\d+-(?:IN|OUT)/;
4206 sub get_ebtables_cmdlist
{
4210 my $cmdlist = "*filter\n";
4212 my $active_chains = ebtables_get_chains
();
4213 my $statushash = get_ruleset_status
($ruleset, $active_chains,
4214 \
&iptables_chain_digest
,
4215 $pve_ebtables_chainname_regex);
4217 # create chains first and make sure PVE rules are evaluated if active
4218 my $append_pve_to_forward = '-A FORWARD -j PVEFW-FORWARD';
4219 my $pve_include = 0;
4220 foreach my $chain (sort keys %$statushash) {
4221 next if ($statushash->{$chain}->{action
} eq 'delete');
4222 my $policy = $statushash->{$chain}->{policy
} // 'ACCEPT';
4223 $cmdlist .= ":$chain $policy\n";
4224 $pve_include = 1 if ($chain eq 'PVEFW-FORWARD');
4227 foreach my $chain (sort keys %$statushash) {
4228 my $stat = $statushash->{$chain};
4229 $changes = 1 if ($stat->{action
} !~ 'ignore|exists');
4230 next if ($stat->{action
} eq 'delete');
4232 foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
4233 if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
4234 next if ! $pve_include;
4237 $cmdlist .= "$cmd\n";
4240 $cmdlist .= "$append_pve_to_forward\n" if $pve_include;
4242 return wantarray ?
($cmdlist, $changes) : $cmdlist;
4245 sub get_ipset_cmdlist
{
4250 my $delete_cmdlist = "";
4252 my $active_chains = ipset_get_chains
();
4253 my $statushash = get_ruleset_status
($ruleset, $active_chains, \
&ipset_chain_digest
);
4255 # remove stale _swap chains
4256 foreach my $chain (keys %$active_chains) {
4257 if ($chain =~ m/^PVEFW-\S+_swap$/) {
4258 $cmdlist .= "destroy $chain\n";
4262 foreach my $chain (keys %$ruleset) {
4263 my $stat = $statushash->{$chain};
4264 die "internal error" if !$stat;
4266 if ($stat->{action
} eq 'create') {
4267 foreach my $cmd (@{$ruleset->{$chain}}) {
4268 $cmdlist .= "$cmd\n";
4273 foreach my $chain (keys %$ruleset) {
4274 my $stat = $statushash->{$chain};
4275 die "internal error" if !$stat;
4277 if ($stat->{action
} eq 'update') {
4278 my $chain_swap = $chain."_swap";
4280 foreach my $cmd (@{$ruleset->{$chain}}) {
4281 $cmd =~ s/$chain/$chain_swap/;
4282 $cmdlist .= "$cmd\n";
4284 $cmdlist .= "swap $chain_swap $chain\n";
4285 $cmdlist .= "flush $chain_swap\n";
4286 $cmdlist .= "destroy $chain_swap\n";
4290 # the remove unused chains
4291 foreach my $chain (keys %$statushash) {
4292 next if $statushash->{$chain}->{action
} ne 'delete';
4294 $delete_cmdlist .= "flush $chain\n";
4295 $delete_cmdlist .= "destroy $chain\n";
4298 my $changes = ($cmdlist || $delete_cmdlist) ?
1 : 0;
4300 return ($cmdlist, $delete_cmdlist, $changes);
4304 my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = @_;
4306 enable_bridge_firewall
();
4308 my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
4309 get_ipset_cmdlist
($ipset_ruleset);
4311 my ($cmdlist, $changes) = get_ruleset_cmdlist
($ruleset->{filter
});
4312 my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist
($rulesetv6->{filter
}, "ip6tables");
4313 my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist
($ebtables_ruleset);
4314 my ($cmdlist_raw, $changes_raw) = get_ruleset_cmdlist
($ruleset->{raw
}, undef, 'raw');
4315 my ($cmdlistv6_raw, $changesv6_raw) = get_ruleset_cmdlist
($rulesetv6->{raw
}, "ip6tables", 'raw');
4318 if ($ipset_changes) {
4319 print "ipset changes:\n";
4320 print $ipset_create_cmdlist if $ipset_create_cmdlist;
4321 print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
4325 print "iptables changes:\n";
4330 print "ip6tables changes:\n";
4335 print "iptables table raw changes:\n";
4339 if ($changesv6_raw) {
4340 print "ip6tables table raw changes:\n";
4341 print $cmdlistv6_raw;
4344 if ($ebtables_changes) {
4345 print "ebtables changes:\n";
4346 print $ebtables_cmdlist;
4350 my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
4351 PVE
::Tools
::file_set_contents
($tmpfile, $ipset_create_cmdlist || '');
4353 ipset_restore_cmdlist
($ipset_create_cmdlist);
4355 $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
4356 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlist || '');
4358 iptables_restore_cmdlist
($cmdlist);
4360 $tmpfile = "$pve_fw_status_dir/ip4cmdlistraw";
4361 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlist_raw || '');
4363 iptables_restore_cmdlist
($cmdlist_raw, 'raw');
4365 $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
4366 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlistv6 || '');
4368 ip6tables_restore_cmdlist
($cmdlistv6);
4370 $tmpfile = "$pve_fw_status_dir/ip6cmdlistraw";
4371 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlistv6_raw || '');
4373 ip6tables_restore_cmdlist
($cmdlistv6_raw, 'raw');
4375 $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
4376 PVE
::Tools
::file_set_contents
($tmpfile, $ipset_delete_cmdlist || '');
4378 ipset_restore_cmdlist
($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
4380 ebtables_restore_cmdlist
($ebtables_cmdlist);
4382 $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
4383 PVE
::Tools
::file_set_contents
($tmpfile, $ebtables_cmdlist || '');
4385 # test: re-read status and check if everything is up to date
4386 my $ruleset_filter = $ruleset->{filter
};
4387 my $active_chains = iptables_get_chains
();
4388 my $statushash = get_ruleset_status
($ruleset_filter, $active_chains, \
&iptables_chain_digest
);
4391 foreach my $chain (sort keys %$ruleset_filter) {
4392 my $stat = $statushash->{$chain};
4393 if ($stat->{action
} ne 'exists') {
4394 warn "unable to update chain '$chain'\n";
4399 my $rulesetv6_filter = $rulesetv6->{filter
};
4400 my $active_chainsv6 = iptables_get_chains
("ip6tables");
4401 my $statushashv6 = get_ruleset_status
($rulesetv6_filter, $active_chainsv6, \
&iptables_chain_digest
);
4403 foreach my $chain (sort keys %$rulesetv6_filter) {
4404 my $stat = $statushashv6->{$chain};
4405 if ($stat->{action
} ne 'exists') {
4406 warn "unable to update chain '$chain'\n";
4411 my $ruleset_raw = $ruleset->{raw
};
4412 my $active_chains_raw = iptables_get_chains
(undef, 'raw');
4413 my $statushash_raw = get_ruleset_status
($ruleset_raw, $active_chains_raw, \
&iptables_chain_digest
);
4415 foreach my $chain (sort keys %$ruleset_raw) {
4416 my $stat = $statushash_raw->{$chain};
4417 if ($stat->{action
} ne 'exists') {
4418 warn "unable to update chain '$chain'\n";
4423 my $rulesetv6_raw = $rulesetv6->{raw
};
4424 my $active_chainsv6_raw = iptables_get_chains
("ip6tables", 'raw');
4425 my $statushashv6_raw = get_ruleset_status
($rulesetv6_raw, $active_chainsv6_raw, \
&iptables_chain_digest
);
4427 foreach my $chain (sort keys %$rulesetv6_raw) {
4428 my $stat = $statushashv6_raw->{$chain};
4429 if ($stat->{action
} ne 'exists') {
4430 warn "unable to update chain '$chain'\n";
4435 my $active_ebtables_chains = ebtables_get_chains
();
4436 my $ebtables_statushash = get_ruleset_status
($ebtables_ruleset,
4437 $active_ebtables_chains, \
&iptables_chain_digest
,
4438 $pve_ebtables_chainname_regex);
4440 foreach my $chain (sort keys %$ebtables_ruleset) {
4441 my $stat = $ebtables_statushash->{$chain};
4442 if ($stat->{action
} ne 'exists') {
4443 warn "ebtables : unable to update chain '$chain'\n";
4448 die "unable to apply firewall changes\n" if $errors;
4450 update_nf_conntrack_max
($hostfw_conf);
4452 update_nf_conntrack_tcp_timeout_established
($hostfw_conf);
4454 update_nf_conntrack_tcp_timeout_syn_recv
($hostfw_conf);
4456 update_nf_conntrack_logging
($hostfw_conf);
4459 sub update_nf_conntrack_max
{
4460 my ($hostfw_conf) = @_;
4462 my $max = 262144; # reasonable default (2^16 * 4), see nf_conntrack-sysctl docs
4464 my $options = $hostfw_conf->{options
} || {};
4466 if (defined($options->{nf_conntrack_max
}) && ($options->{nf_conntrack_max
} > $max)) {
4467 $max = $options->{nf_conntrack_max
};
4468 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
4471 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
4472 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
4474 my $current = int(PVE
::Tools
::file_read_firstline
($filename_nf_conntrack_max) || $max);
4476 if ($current != $max) {
4477 my $hashsize = int($max/4);
4478 PVE
::ProcFSTools
::write_proc_entry
($filename_hashsize, $hashsize);
4479 PVE
::ProcFSTools
::write_proc_entry
($filename_nf_conntrack_max, $max);
4483 sub update_nf_conntrack_tcp_timeout_established
{
4484 my ($hostfw_conf) = @_;
4486 my $options = $hostfw_conf->{options
} || {};
4488 my $value = defined($options->{nf_conntrack_tcp_timeout_established
}) ?
$options->{nf_conntrack_tcp_timeout_established
} : 432000;
4490 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
4493 sub update_nf_conntrack_tcp_timeout_syn_recv
{
4494 my ($hostfw_conf) = @_;
4496 my $options = $hostfw_conf->{options
} || {};
4498 my $value = defined($options->{nf_conntrack_tcp_timeout_syn_recv
}) ?
$options->{nf_conntrack_tcp_timeout_syn_recev
} : 60;
4500 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_syn_recv", $value);
4503 my $log_nf_conntrack_enabled = undef;
4504 sub update_nf_conntrack_logging
{
4505 my ($hostfw_conf) = @_;
4507 my $options = $hostfw_conf->{options
} || {};
4508 my $value = $options->{log_nf_conntrack
} || 0;
4509 if (!defined($log_nf_conntrack_enabled)
4510 || $value != $log_nf_conntrack_enabled)
4512 my $tmpfile = "$pve_fw_status_dir/log_nf_conntrack";
4513 PVE
::Tools
::file_set_contents
($tmpfile, $value);
4515 run_command
([qw(systemctl try-reload-or-restart pvefw-logger.service)]);
4516 $log_nf_conntrack_enabled = $value;
4520 sub remove_pvefw_chains
{
4522 PVE
::Firewall
::remove_pvefw_chains_iptables
("iptables");
4523 PVE
::Firewall
::remove_pvefw_chains_iptables
("ip6tables");
4524 PVE
::Firewall
::remove_pvefw_chains_iptables
("iptables", "raw");
4525 PVE
::Firewall
::remove_pvefw_chains_iptables
("ip6tables", "raw");
4526 PVE
::Firewall
::remove_pvefw_chains_ipset
();
4527 PVE
::Firewall
::remove_pvefw_chains_ebtables
();
4531 sub remove_pvefw_chains_iptables
{
4532 my ($iptablescmd, $table) = @_;
4534 $table = 'filter' if !$table;
4536 my ($chash, $hooks) = iptables_get_chains
($iptablescmd, $table);
4537 my $cmdlist = "*$table\n";
4539 foreach my $h (qw(INPUT OUTPUT FORWARD PREROUTING)) {
4541 $cmdlist .= "-D $h -j PVEFW-$h\n";
4545 foreach my $chain (keys %$chash) {
4546 $cmdlist .= "-F $chain\n";
4549 foreach my $chain (keys %$chash) {
4550 $cmdlist .= "-X $chain\n";
4552 $cmdlist .= "COMMIT\n";
4554 if($iptablescmd eq "ip6tables") {
4555 ip6tables_restore_cmdlist
($cmdlist, $table);
4557 iptables_restore_cmdlist
($cmdlist, $table);
4561 sub remove_pvefw_chains_ipset
{
4563 my $ipset_chains = ipset_get_chains
();
4567 foreach my $chain (keys %$ipset_chains) {
4568 $cmdlist .= "flush $chain\n";
4569 $cmdlist .= "destroy $chain\n";
4572 ipset_restore_cmdlist
($cmdlist) if $cmdlist;
4575 sub remove_pvefw_chains_ebtables
{
4576 # apply empty ruleset = remove all our chains
4577 ebtables_restore_cmdlist
(get_ebtables_cmdlist
({}));
4581 my $cluster_conf = load_clusterfw_conf
();
4582 my $cluster_options = $cluster_conf->{options
};
4583 my $enable = $cluster_options->{enable
};
4587 # load required modules here
4593 my $cluster_conf = load_clusterfw_conf
();
4594 my $cluster_options = $cluster_conf->{options
};
4596 if (!$cluster_options->{enable
}) {
4597 PVE
::Firewall
::remove_pvefw_chains
();
4601 my $hostfw_conf = load_hostfw_conf
($cluster_conf);
4603 my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile
($cluster_conf, $hostfw_conf);
4605 apply_ruleset
($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);