8 use Socket
qw(AF_INET6 inet_ntop inet_pton);
10 use PVE
::Exception
qw(raise raise_param_exc);
11 use PVE
::JSONSchema
qw(register_standard_option get_standard_option);
14 use PVE
::Tools
qw($IPV4RE $IPV6RE);
21 use PVE
::Tools
qw(run_command lock_file dir_glob_foreach);
23 use Storable
qw(dclone);
25 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
26 my $pvefw_conf_dir = "/etc/pve/firewall";
27 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
29 # dynamically include PVE::QemuServer and PVE::LXC
30 # to avoid dependency problems
33 require PVE
::QemuServer
;
34 require PVE
::QemuConfig
;
35 $have_qemu_server = 1;
45 my $pve_fw_status_dir = "/var/lib/pve-firewall";
47 mkdir $pve_fw_status_dir; # make sure this exists
49 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
50 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
51 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
53 my $max_alias_name_length = 64;
54 my $max_ipset_name_length = 64;
55 my $max_group_name_length = 18;
57 my $PROTOCOLS_WITH_PORTS = {
59 udplite
=> 1, 136 => 1,
65 PVE
::JSONSchema
::register_format
('IPorCIDR', \
&pve_verify_ip_or_cidr
);
66 sub pve_verify_ip_or_cidr
{
67 my ($cidr, $noerr) = @_;
69 if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
70 return $cidr if Net
::IP-
>new($cidr);
71 return undef if $noerr;
72 die Net
::IP
::Error
() . "\n";
74 return undef if $noerr;
75 die "value does not look like a valid IP address or CIDR network\n";
78 PVE
::JSONSchema
::register_format
('IPorCIDRorAlias', \
&pve_verify_ip_or_cidr_or_alias
);
79 sub pve_verify_ip_or_cidr_or_alias
{
80 my ($cidr, $noerr) = @_;
82 return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
84 return pve_verify_ip_or_cidr
($cidr, $noerr);
87 PVE
::JSONSchema
::register_standard_option
('ipset-name', {
88 description
=> "IP set name.",
90 pattern
=> $ipset_name_pattern,
92 maxLength
=> $max_ipset_name_length,
95 PVE
::JSONSchema
::register_standard_option
('pve-fw-alias', {
96 description
=> "Alias name.",
98 pattern
=> $ip_alias_pattern,
100 maxLength
=> $max_alias_name_length,
103 PVE
::JSONSchema
::register_standard_option
('pve-fw-loglevel' => {
104 description
=> "Log level.",
106 enum
=> ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
110 PVE
::JSONSchema
::register_standard_option
('pve-security-group-name', {
111 description
=> "Security Group name.",
113 pattern
=> $security_group_name_pattern,
115 maxLength
=> $max_group_name_length,
118 my $feature_ipset_nomatch = 0;
120 my (undef, undef, $release) = POSIX
::uname
();
121 if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
122 my ($major, $minor) = ($1, $2);
123 $feature_ipset_nomatch = 1 if ($major > 3) ||
124 ($major == 3 && $minor >= 7);
129 my $nodename = PVE
::INotify
::nodename
();
131 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
133 my $default_log_level = 'nolog'; # avoid logs by default
135 my $log_level_hash = {
152 # sport => port[,port[,port]].. or port:port
153 # dport => port[,port[,port]].. or port:port
154 # log => optional, loglevel
155 # logmsg => optional, logmsg - overwrites default
156 # iface_in => incomin interface
157 # iface_out => outgoing interface
158 # match => optional, overwrites generation of match
159 # target => optional, overwrites action
161 # we need to overwrite some macros for ipv6
162 my $pve_ipv6fw_macros = {
164 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'echo-request' },
166 'NeighborDiscovery' => [
167 "IPv6 neighbor solicitation, neighbor and router advertisement",
168 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'router-solicitation' },
169 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'router-advertisement' },
170 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'neighbor-solicitation' },
171 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'neighbor-advertisement' },
175 { action
=> 'PARAM', proto
=> 'udp', dport
=> '546:547', sport
=> '546:547' },
178 { action
=> 'PARAM', proto
=> 'udp', dport
=> '33434:33524' },
179 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'echo-request' },
183 # imported/converted from: /usr/share/shorewall/macro.*
184 my $pve_fw_macros = {
187 { action
=> 'PARAM', proto
=> 'udp', dport
=> '10080' },
188 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10080' },
191 "Auth (identd) traffic",
192 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '113' },
195 "Border Gateway Protocol traffic",
196 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '179' },
199 "BitTorrent traffic for BitTorrent 3.1 and earlier",
200 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6889' },
201 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
204 "BitTorrent traffic for BitTorrent 3.2 and later",
205 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6999' },
206 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
209 "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
210 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6789' },
211 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6800:7300' },
214 "Concurrent Versions System pserver traffic",
215 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2401' },
218 "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
219 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1494' },
220 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1604' },
221 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2598' },
224 "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
225 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3689' },
226 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3689' },
229 "Distributed Checksum Clearinghouse spam filtering mechanism",
230 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6277' },
233 "Forwarded DHCP traffic",
234 { action
=> 'PARAM', proto
=> 'udp', dport
=> '67:68', sport
=> '67:68' },
237 "Domain Name System traffic (upd and tcp)",
238 { action
=> 'PARAM', proto
=> 'udp', dport
=> '53' },
239 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '53' },
242 "Distributed Compiler service",
243 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3632' },
246 "File Transfer Protocol",
247 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '21' },
250 "Finger protocol (RFC 742)",
251 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '79' },
254 "GNUnet secure peer-to-peer networking traffic",
255 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2086' },
256 { action
=> 'PARAM', proto
=> 'udp', dport
=> '2086' },
257 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1080' },
258 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1080' },
261 "Generic Routing Encapsulation tunneling protocol",
262 { action
=> 'PARAM', proto
=> '47' },
265 "Git distributed revision control traffic",
266 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9418' },
269 "OpenPGP HTTP keyserver protocol traffic",
270 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '11371' },
273 "Hypertext Transfer Protocol (WWW)",
274 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
277 "Hypertext Transfer Protocol (WWW) over SSL",
278 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
281 "Internet Cache Protocol V2 (Squid) traffic",
282 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3130' },
285 "AOL Instant Messenger traffic",
286 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5190' },
289 "Internet Message Access Protocol",
290 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '143' },
293 "Internet Message Access Protocol over SSL",
294 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '993' },
297 "IPIP capsulation traffic",
298 { action
=> 'PARAM', proto
=> '94' },
302 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
303 { action
=> 'PARAM', proto
=> '50' },
306 "IPsec authentication (AH) traffic",
307 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
308 { action
=> 'PARAM', proto
=> '51' },
311 "IPsec traffic and Nat-Traversal",
312 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500' },
313 { action
=> 'PARAM', proto
=> 'udp', dport
=> '4500' },
314 { action
=> 'PARAM', proto
=> '50' },
317 "Internet Relay Chat traffic",
318 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6667' },
321 "HP Jetdirect printing",
322 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9100' },
325 "Layer 2 Tunneling Protocol traffic",
326 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1701' },
329 "Lightweight Directory Access Protocol traffic",
330 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '389' },
333 "Secure Lightweight Directory Access Protocol traffic",
334 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '636' },
337 "Microsoft Notification Protocol",
338 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1863' },
341 "Microsoft SQL Server",
342 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1433' },
345 "Mail traffic (SMTP, SMTPS, Submission)",
346 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
347 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
348 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
352 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5353' },
355 "Munin networked resource monitoring traffic",
356 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '4949' },
360 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3306' },
363 "NNTP traffic (Usenet).",
364 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '119' },
367 "Encrypted NNTP traffic (Usenet)",
368 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '563' },
371 "Network Time Protocol (ntpd)",
372 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
375 "OSPF multicast traffic",
376 { action
=> 'PARAM', proto
=> '89' },
380 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1194' },
383 "Symantec PCAnywere (tm)",
384 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5632' },
385 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5631' },
389 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '110' },
392 "Encrypted POP3 traffic",
393 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '995' },
396 "Point-to-Point Tunneling Protocol",
397 { action
=> 'PARAM', proto
=> '47' },
398 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1723' },
402 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
406 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5432' },
409 "Line Printer protocol printing",
410 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '515' },
413 "Microsoft Remote Desktop Protocol traffic",
414 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3389' },
417 "Routing Information Protocol (bidirectional)",
418 { action
=> 'PARAM', proto
=> 'udp', dport
=> '520' },
421 "BIND remote management protocol",
422 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '953' },
425 "Razor Antispam System",
426 { action
=> 'ACCEPT', proto
=> 'tcp', dport
=> '2703' },
429 "Remote time retrieval (rdate)",
430 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
434 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '873' },
437 "SANE network scanning",
438 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6566' },
441 "Microsoft SMB traffic",
442 { action
=> 'PARAM', proto
=> 'udp', dport
=> '135,445' },
443 { action
=> 'PARAM', proto
=> 'udp', dport
=> '137:139' },
444 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
445 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '135,139,445' },
448 "Samba Web Administration Tool",
449 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '901' },
452 "Simple Mail Transfer Protocol",
453 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
456 "Encrypted Simple Mail Transfer Protocol",
457 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
460 "Simple Network Management Protocol",
461 { action
=> 'PARAM', proto
=> 'udp', dport
=> '161:162' },
462 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '161' },
465 "Spam Assassin SPAMD traffic",
466 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '783' },
469 "Secure shell traffic",
470 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '22' },
473 "Subversion server (svnserve)",
474 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3690' },
477 "SixXS IPv6 Deployment and Tunnel Broker",
478 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3874' },
479 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3740' },
480 { action
=> 'PARAM', proto
=> '41' },
481 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5072,8374' },
484 "Squid web proxy traffic",
485 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3128' },
488 "Mail message submission traffic",
489 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
492 "Syslog protocol (RFC 5424) traffic",
493 { action
=> 'PARAM', proto
=> 'udp', dport
=> '514' },
494 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '514' },
497 "Trivial File Transfer Protocol traffic",
498 { action
=> 'PARAM', proto
=> 'udp', dport
=> '69' },
502 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '23' },
506 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '992' },
509 "RFC 868 Time protocol",
510 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
513 "Traceroute (for up to 30 hops) traffic",
514 { action
=> 'PARAM', proto
=> 'udp', dport
=> '33434:33524' },
515 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
518 "VNC traffic for VNC display's 0 - 99",
519 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5900:5999' },
522 "VNC traffic from Vncservers to Vncviewers in listen mode",
523 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5500' },
526 "WWW traffic (HTTP and HTTPS)",
527 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
528 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
531 "Web Cache/Proxy traffic (port 8080)",
532 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '8080' },
536 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10000' },
539 "Whois (nicname, RFC 3912) traffic",
540 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '43' },
544 my $pve_fw_parsed_macros;
545 my $pve_fw_macro_descr;
546 my $pve_fw_macro_ipversion = {};
547 my $pve_fw_preferred_macro_names = {};
549 my $FWACCEPTMARK_ON = "0x80000000/0x80000000";
550 my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
552 my $pve_std_chains = {};
553 my $pve_std_chains_conf = {};
554 $pve_std_chains_conf->{4} = {
555 'PVEFW-SET-ACCEPT-MARK' => [
556 { target
=> "-j MARK --set-mark $FWACCEPTMARK_ON" },
558 'PVEFW-DropBroadcast' => [
559 # same as shorewall 'Broadcast'
560 # simply DROP BROADCAST/MULTICAST/ANYCAST
561 # we can use this to reduce logging
562 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
563 { action
=> 'DROP', dsttype
=> 'MULTICAST' },
564 { action
=> 'DROP', dsttype
=> 'ANYCAST' },
565 { action
=> 'DROP', dest
=> '224.0.0.0/4' },
568 # same as shorewall 'reject'
569 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
570 { action
=> 'DROP', source
=> '224.0.0.0/4' },
571 { action
=> 'DROP', proto
=> 'icmp' },
572 { match
=> '-p tcp', target
=> '-j REJECT --reject-with tcp-reset' },
573 { match
=> '-p udp', target
=> '-j REJECT --reject-with icmp-port-unreachable' },
574 { match
=> '-p icmp', target
=> '-j REJECT --reject-with icmp-host-unreachable' },
575 { target
=> '-j REJECT --reject-with icmp-host-prohibited' },
578 # same as shorewall 'Drop', which is equal to DROP,
579 # but REJECT/DROP some packages to reduce logging,
580 # and ACCEPT critical ICMP types
581 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
582 # we are not interested in BROADCAST/MULTICAST/ANYCAST
583 { action
=> 'PVEFW-DropBroadcast' },
584 # ACCEPT critical ICMP types
585 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
586 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
587 # Drop packets with INVALID state
588 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
589 # Drop Microsoft SMB noise
590 { action
=> 'DROP', proto
=> 'udp', dport
=> '135,445' },
591 { action
=> 'DROP', proto
=> 'udp', dport
=> '137:139' },
592 { action
=> 'DROP', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
593 { action
=> 'DROP', proto
=> 'tcp', dport
=> '135,139,445' },
594 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
595 # Drop new/NotSyn traffic so that it doesn't get logged
596 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
598 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
601 # same as shorewall 'Reject', which is equal to Reject,
602 # but REJECT/DROP some packages to reduce logging,
603 # and ACCEPT critical ICMP types
604 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
605 # we are not interested in BROADCAST/MULTICAST/ANYCAST
606 { action
=> 'PVEFW-DropBroadcast' },
607 # ACCEPT critical ICMP types
608 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
609 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
610 # Drop packets with INVALID state
611 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
612 # Drop Microsoft SMB noise
613 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '135,445' },
614 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '137:139'},
615 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
616 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '135,139,445' },
617 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
618 # Drop new/NotSyn traffic so that it doesn't get logged
619 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
621 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
623 'PVEFW-tcpflags' => [
624 # same as shorewall tcpflags action.
625 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
626 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target
=> '-g PVEFW-logflags' },
627 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target
=> '-g PVEFW-logflags' },
628 { match
=> '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target
=> '-g PVEFW-logflags' },
629 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target
=> '-g PVEFW-logflags' },
630 { match
=> '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target
=> '-g PVEFW-logflags' },
633 # same as shorewall smurfs action
634 # Filter packets for smurfs (packets with a broadcast address as the source).
635 { match
=> '-s 0.0.0.0/32', target
=> '-j RETURN' }, # allow DHCP
636 { match
=> '-m addrtype --src-type BROADCAST', target
=> '-g PVEFW-smurflog' },
637 { match
=> '-s 224.0.0.0/4', target
=> '-g PVEFW-smurflog' },
639 'PVEFW-smurflog' => [
640 { action
=> 'DROP', logmsg
=> 'DROP: ' },
642 'PVEFW-logflags' => [
643 { action
=> 'DROP', logmsg
=> 'DROP: ' },
647 $pve_std_chains_conf->{6} = {
648 'PVEFW-SET-ACCEPT-MARK' => [
649 { target
=> "-j MARK --set-mark $FWACCEPTMARK_ON" },
651 'PVEFW-DropBroadcast' => [
652 # same as shorewall 'Broadcast'
653 # simply DROP BROADCAST/MULTICAST/ANYCAST
654 # we can use this to reduce logging
655 #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
656 # ipv6 addrtype does not work with kernel 2.6.32
657 #{ action => 'DROP', dsttype => 'MULTICAST' },
658 #{ action => 'DROP', dsttype => 'ANYCAST' },
659 { action
=> 'DROP', dest
=> 'ff00::/8' },
660 #{ action => 'DROP', dest => '224.0.0.0/4' },
663 # same as shorewall 'reject'
664 #{ action => 'DROP', dsttype => 'BROADCAST' },
665 #{ action => 'DROP', source => '224.0.0.0/4' },
666 { action
=> 'DROP', proto
=> 'icmpv6' },
667 { match
=> '-p tcp', target
=> '-j REJECT --reject-with tcp-reset' },
668 #"-p udp -j REJECT --reject-with icmp-port-unreachable",
669 #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
670 #"-j REJECT --reject-with icmp-host-prohibited",
673 # same as shorewall 'Drop', which is equal to DROP,
674 # but REJECT/DROP some packages to reduce logging,
675 # and ACCEPT critical ICMP types
676 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
677 # we are not interested in BROADCAST/MULTICAST/ANYCAST
678 { action
=> 'PVEFW-DropBroadcast' },
679 # ACCEPT critical ICMP types
680 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'destination-unreachable' },
681 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'time-exceeded' },
682 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'packet-too-big' },
683 # Drop packets with INVALID state
684 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
685 # Drop Microsoft SMB noise
686 { action
=> 'DROP', proto
=> 'udp', dport
=> '135,445' },
687 { action
=> 'DROP', proto
=> 'udp', dport
=> '137:139'},
688 { action
=> 'DROP', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
689 { action
=> 'DROP', proto
=> 'tcp', dport
=> '135,139,445' },
690 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
691 # Drop new/NotSyn traffic so that it doesn't get logged
692 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
694 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
697 # same as shorewall 'Reject', which is equal to Reject,
698 # but REJECT/DROP some packages to reduce logging,
699 # and ACCEPT critical ICMP types
700 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
701 # we are not interested in BROADCAST/MULTICAST/ANYCAST
702 { action
=> 'PVEFW-DropBroadcast' },
703 # ACCEPT critical ICMP types
704 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'destination-unreachable' },
705 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'time-exceeded' },
706 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'packet-too-big' },
707 # Drop packets with INVALID state
708 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
709 # Drop Microsoft SMB noise
710 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '135,445' },
711 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '137:139' },
712 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
713 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '135,139,445' },
714 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
715 # Drop new/NotSyn traffic so that it doesn't get logged
716 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
718 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
720 'PVEFW-tcpflags' => [
721 # same as shorewall tcpflags action.
722 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
723 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target
=> '-g PVEFW-logflags' },
724 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target
=> '-g PVEFW-logflags' },
725 { match
=> '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target
=> '-g PVEFW-logflags' },
726 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target
=> '-g PVEFW-logflags' },
727 { match
=> '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target
=> '-g PVEFW-logflags' },
729 'PVEFW-logflags' => [
730 { action
=> 'DROP', logmsg
=> 'DROP: ' },
734 # iptables -p icmp -h
735 my $icmp_type_names = {
738 'destination-unreachable' => 1,
739 'network-unreachable' => 1,
740 'host-unreachable' => 1,
741 'protocol-unreachable' => 1,
742 'port-unreachable' => 1,
743 'fragmentation-needed' => 1,
744 'source-route-failed' => 1,
745 'network-unknown' => 1,
747 'network-prohibited' => 1,
748 'host-prohibited' => 1,
749 'TOS-network-unreachable' => 1,
750 'TOS-host-unreachable' => 1,
751 'communication-prohibited' => 1,
752 'host-precedence-violation' => 1,
753 'precedence-cutoff' => 1,
754 'source-quench' => 1,
756 'network-redirect' => 1,
757 'host-redirect' => 1,
758 'TOS-network-redirect' => 1,
759 'TOS-host-redirect' => 1,
761 'router-advertisement' => 1,
762 'router-solicitation' => 1,
763 'time-exceeded' => 1,
764 'ttl-zero-during-transit' => 1,
765 'ttl-zero-during-reassembly' => 1,
766 'parameter-problem' => 1,
767 'ip-header-bad' => 1,
768 'required-option-missing' => 1,
769 'timestamp-request' => 1,
770 'timestamp-reply' => 1,
771 'address-mask-request' => 1,
772 'address-mask-reply' => 1,
775 # ip6tables -p icmpv6 -h
777 my $icmpv6_type_names = {
779 'destination-unreachable' => 1,
781 'communication-prohibited' => 1,
782 'address-unreachable' => 1,
783 'port-unreachable' => 1,
784 'packet-too-big' => 1,
785 'time-exceeded' => 1,
786 'ttl-zero-during-transit' => 1,
787 'ttl-zero-during-reassembly' => 1,
788 'parameter-problem' => 1,
790 'unknown-header-type' => 1,
791 'unknown-option' => 1,
794 'router-solicitation' => 1,
795 'router-advertisement' => 1,
796 'neighbor-solicitation' => 1,
797 'neighbour-solicitation' => 1,
798 'neighbor-advertisement' => 1,
799 'neighbour-advertisement' => 1,
803 sub init_firewall_macros
{
805 $pve_fw_parsed_macros = {};
808 my ($k, $macro) = @_;
809 my $lc_name = lc($k);
810 $pve_fw_macro_ipversion->{$k} = 0;
811 while (!ref($macro->[0])) {
812 my $desc = shift @$macro;
813 if ($desc eq 'ipv4only') {
814 $pve_fw_macro_ipversion->{$k} = 4;
815 } elsif ($desc eq 'ipv6only') {
816 $pve_fw_macro_ipversion->{$k} = 6;
818 $pve_fw_macro_descr->{$k} = $desc;
821 $pve_fw_preferred_macro_names->{$lc_name} = $k;
822 $pve_fw_parsed_macros->{$k} = $macro;
825 foreach my $k (keys %$pve_fw_macros) {
826 &$parse($k, $pve_fw_macros->{$k});
829 foreach my $k (keys %$pve_ipv6fw_macros) {
830 next if $pve_fw_parsed_macros->{$k};
831 &$parse($k, $pve_ipv6fw_macros->{$k});
832 $pve_fw_macro_ipversion->{$k} = 6;
836 init_firewall_macros
();
839 return wantarray ?
($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
844 sub get_etc_services
{
846 return $etc_services if $etc_services;
848 my $filename = "/etc/services";
850 my $fh = IO
::File-
>new($filename, O_RDONLY
);
852 warn "unable to read '$filename' - $!\n";
858 while (my $line = <$fh>) {
860 next if $line =~m/^#/;
861 next if ($line =~m/^\s*$/);
863 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp|sctp).*$!) {
864 $services->{byid
}->{$2}->{name
} = $1;
865 $services->{byid
}->{$2}->{port
} = $2;
866 $services->{byid
}->{$2}->{$3} = 1;
867 $services->{byname
}->{$1} = $services->{byid
}->{$2};
873 $etc_services = $services;
876 return $etc_services;
879 sub parse_protocol_file
{
882 my $fh = IO
::File-
>new($filename, O_RDONLY
);
884 warn "unable to read '$filename' - $!\n";
890 while (my $line = <$fh>) {
892 next if $line =~m/^#/;
893 next if ($line =~m/^\s*$/);
895 if ($line =~ m!^(\S+)\s+(\d+)(?:\s+.*)?$!) {
896 $protocols->{byid
}->{$2}->{name
} = $1;
897 $protocols->{byname
}->{$1} = $protocols->{byid
}->{$2};
908 sub get_etc_protocols
{
909 return $etc_protocols if $etc_protocols;
911 my $protocols = parse_protocol_file
('/etc/protocols');
913 # add special case for ICMP v6
914 $protocols->{byid
}->{icmpv6
}->{name
} = "icmpv6";
915 $protocols->{byname
}->{icmpv6
} = $protocols->{byid
}->{icmpv6
};
917 $etc_protocols = $protocols;
919 return $etc_protocols;
924 sub get_etc_ethertypes
{
925 $etc_ethertypes = parse_protocol_file
('/etc/ethertypes')
927 return $etc_ethertypes;
933 my ($new_value) = @_;
935 $__local_network = $new_value if defined($new_value);
937 return $__local_network if defined($__local_network);
940 my $nodename = PVE
::INotify
::nodename
();
942 my $ip = PVE
::Cluster
::remote_node_ip
($nodename);
944 my $testip = Net
::IP-
>new($ip);
946 my $isv6 = $testip->version == 6;
947 my $routes = $isv6 ? PVE
::ProcFSTools
::read_proc_net_ipv6_route
()
948 : PVE
::ProcFSTools
::read_proc_net_route
();
949 foreach my $entry (@$routes) {
952 $mask = $entry->{prefix
};
953 next if !$mask; # skip the default route...
955 $mask = $PVE::Network
::ipv4_mask_hash_localnet-
>{$entry->{mask
}};
956 next if !defined($mask);
958 my $cidr = "$entry->{dest}/$mask";
959 my $testnet = Net
::IP-
>new($cidr);
960 my $overlap = $testnet->overlaps($testip);
961 if ($overlap == $Net::IP
::IP_B_IN_A_OVERLAP
||
962 $overlap == $Net::IP
::IP_IDENTICAL
)
964 $__local_network = $cidr;
971 return $__local_network;
974 # ipset names are limited to 31 characters,
975 # and we use '-v4' or '-v6' to indicate IP versions,
976 # and we use '_swap' suffix for atomic update,
977 # for example PVEFW-${VMID}-${ipset_name}_swap
979 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
981 sub compute_ipset_chain_name
{
982 my ($vmid, $ipset_name, $ipversion) = @_;
984 $vmid = 0 if !defined($vmid);
986 my $id = "$vmid-${ipset_name}-v$ipversion";
988 if (length($id) > $max_iptables_ipset_name_length) {
989 $id = PVE
::Tools
::fnv31a_hex
($id);
995 sub compute_ipfilter_ipset_name
{
998 return "ipfilter-$iface";
1001 sub parse_address_list
{
1004 if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
1005 die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
1009 if ($str =~ m/^${ip_alias_pattern}$/) {
1010 die "alias name too long\n" if length($str) > $max_alias_name_length;
1018 my @elements = split(/,/, $str);
1019 die "extraneous commas in list\n" if $str ne join(',', @elements);
1020 foreach my $elem (@elements) {
1022 my $ip = Net
::IP-
>new($elem);
1024 my $err = Net
::IP
::Error
();
1025 die "invalid IP address: $err\n";
1027 $iprange = 1 if $elem =~ m/-/;
1029 my $new_ipversion = Net
::IP
::ip_is_ipv6
($ip->ip()) ?
6 : 4;
1031 die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
1032 if $ipversion && ($new_ipversion != $ipversion);
1034 $ipversion = $new_ipversion;
1037 die "you can't use a range in a list\n" if $iprange && $count > 1;
1042 sub parse_port_name_number_or_range
{
1043 my ($str, $dport) = @_;
1045 my $services = PVE
::Firewall
::get_etc_services
();
1049 my @elements = split(/,/, $str);
1050 die "extraneous commas in list\n" if $str ne join(',', @elements);
1051 foreach my $item (@elements) {
1052 if ($item =~ m/^([0-9]+):([0-9]+)$/) {
1054 my ($port1, $port2) = ($1, $2);
1055 die "invalid port '$port1'\n" if $port1 > 65535;
1056 die "invalid port '$port2'\n" if $port2 > 65535;
1057 die "backwards range '$port1:$port2' not allowed, did you mean '$port2:$port1'?\n" if $port1 > $port2;
1058 } elsif ($item =~ m/^([0-9]+)$/) {
1061 die "invalid port '$port'\n" if $port > 65535;
1063 if ($dport && $icmp_type_names->{$item}) {
1065 } elsif ($dport && $icmpv6_type_names->{$item}) {
1068 die "invalid port '$item'\n" if !$services->{byname
}->{$item};
1073 die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 0;
1075 # I really don't like to use the word number here, but it's the only thing
1076 # that makes sense in a literal way. The range 1:100 counts as 2, not as
1077 # one and not as 100...
1078 die "too many entries in port list (> 15 numbers)\n"
1081 return (scalar(@elements) > 1);
1084 PVE
::JSONSchema
::register_format
('pve-fw-sport-spec', \
&pve_fw_verify_sport_spec
);
1085 sub pve_fw_verify_sport_spec
{
1088 parse_port_name_number_or_range
($portstr, 0);
1093 PVE
::JSONSchema
::register_format
('pve-fw-dport-spec', \
&pve_fw_verify_dport_spec
);
1094 sub pve_fw_verify_dport_spec
{
1097 parse_port_name_number_or_range
($portstr, 1);
1102 PVE
::JSONSchema
::register_format
('pve-fw-addr-spec', \
&pve_fw_verify_addr_spec
);
1103 sub pve_fw_verify_addr_spec
{
1106 parse_address_list
($list);
1111 PVE
::JSONSchema
::register_format
('pve-fw-protocol-spec', \
&pve_fw_verify_protocol_spec
);
1112 sub pve_fw_verify_protocol_spec
{
1115 my $protocols = get_etc_protocols
();
1117 die "unknown protocol '$proto'\n" if $proto &&
1118 !(defined($protocols->{byname
}->{$proto}) ||
1119 defined($protocols->{byid
}->{$proto}));
1125 # helper function for API
1127 sub copy_opject_with_digest
{
1130 my $sha = Digest
::SHA-
>new('sha1');
1133 foreach my $k (sort keys %$object) {
1134 my $v = $object->{$k};
1135 next if !defined($v);
1137 $sha->add($k, ':', $v, "\n");
1140 my $digest = $sha->hexdigest;
1142 $res->{digest
} = $digest;
1144 return wantarray ?
($res, $digest) : $res;
1147 sub copy_list_with_digest
{
1150 my $sha = Digest
::SHA-
>new('sha1');
1153 foreach my $entry (@$list) {
1155 foreach my $k (sort keys %$entry) {
1156 my $v = $entry->{$k};
1157 next if !defined($v);
1159 # Note: digest ignores refs ($rule->{errors})
1160 # since Digest::SHA expects a series of bytes,
1161 # we have to encode the value here to prevent errors when
1162 # using utf8 characters (eg. in comments)
1163 $sha->add($k, ':', encode_utf8
($v), "\n") if !ref($v); ;
1168 my $digest = $sha->hexdigest;
1170 foreach my $entry (@$res) {
1171 $entry->{digest
} = $digest;
1174 return wantarray ?
($res, $digest) : $res;
1177 our $cluster_option_properties = {
1179 description
=> "Enable or disable the firewall cluster wide.",
1185 description
=> "Enable ebtables rules cluster wide.",
1191 description
=> "Input policy.",
1194 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1197 description
=> "Output policy.",
1200 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1204 our $host_option_properties = {
1206 description
=> "Enable host firewall rules.",
1210 log_level_in
=> get_standard_option
('pve-fw-loglevel', {
1211 description
=> "Log level for incoming traffic." }),
1212 log_level_out
=> get_standard_option
('pve-fw-loglevel', {
1213 description
=> "Log level for outgoing traffic." }),
1214 tcp_flags_log_level
=> get_standard_option
('pve-fw-loglevel', {
1215 description
=> "Log level for illegal tcp flags filter." }),
1216 smurf_log_level
=> get_standard_option
('pve-fw-loglevel', {
1217 description
=> "Log level for SMURFS filter." }),
1219 description
=> "Enable SMURFS filter.",
1224 description
=> "Filter illegal combinations of TCP flags.",
1228 nf_conntrack_max
=> {
1229 description
=> "Maximum number of tracked connections.",
1234 nf_conntrack_tcp_timeout_established
=> {
1235 description
=> "Conntrack established timeout.",
1241 description
=> "Enable NDP.",
1245 nf_conntrack_allow_invalid
=> {
1246 description
=> "Allow invalid packets on connection tracking.",
1253 our $vm_option_properties = {
1255 description
=> "Enable/disable firewall rules.",
1260 description
=> "Enable/disable MAC address filter.",
1265 description
=> "Enable DHCP.",
1270 description
=> "Enable NDP.",
1275 description
=> "Allow sending Router Advertisement.",
1280 description
=> "Enable default IP filters. " .
1281 "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1282 "for every interface. Such ipsets implicitly contain sane default " .
1283 "restrictions such as restricting IPv6 link local addresses to " .
1284 "the one derived from the interface's MAC address. For containers " .
1285 "the configured IP addresses will be implicitly added.",
1290 description
=> "Input policy.",
1293 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1296 description
=> "Output policy.",
1299 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1301 log_level_in
=> get_standard_option
('pve-fw-loglevel', {
1302 description
=> "Log level for incoming traffic." }),
1303 log_level_out
=> get_standard_option
('pve-fw-loglevel', {
1304 description
=> "Log level for outgoing traffic." }),
1309 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.";
1311 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.";
1313 my $rule_properties = {
1315 description
=> "Update rule at position <pos>.",
1320 digest
=> get_standard_option
('pve-config-digest'),
1322 description
=> "Rule type.",
1325 enum
=> ['in', 'out', 'group'],
1328 description
=> "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1331 pattern
=> $security_group_name_pattern,
1336 description
=> "Use predefined standard macro.",
1341 iface
=> get_standard_option
('pve-iface', {
1342 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.",
1346 description
=> "Restrict packet source address. $addr_list_descr",
1347 type
=> 'string', format
=> 'pve-fw-addr-spec',
1351 description
=> "Restrict packet destination address. $addr_list_descr",
1352 type
=> 'string', format
=> 'pve-fw-addr-spec',
1356 description
=> "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1357 type
=> 'string', format
=> 'pve-fw-protocol-spec',
1361 description
=> "Flag to enable/disable a rule.",
1367 description
=> "Restrict TCP/UDP source port. $port_descr",
1368 type
=> 'string', format
=> 'pve-fw-sport-spec',
1372 description
=> "Restrict TCP/UDP destination port. $port_descr",
1373 type
=> 'string', format
=> 'pve-fw-dport-spec',
1377 description
=> "Descriptive comment.",
1383 sub add_rule_properties
{
1384 my ($properties) = @_;
1386 foreach my $k (keys %$rule_properties) {
1387 my $h = $rule_properties->{$k};
1388 # copy data, so that we can modify later without side effects
1389 foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1395 sub delete_rule_properties
{
1396 my ($rule, $delete_str) = @_;
1398 foreach my $opt (PVE
::Tools
::split_list
($delete_str)) {
1399 raise_param_exc
({ 'delete' => "no such property ('$opt')"})
1400 if !defined($rule_properties->{$opt});
1401 raise_param_exc
({ 'delete' => "unable to delete required property '$opt'"})
1402 if $opt eq 'type' || $opt eq 'action';
1403 delete $rule->{$opt};
1409 my $apply_macro = sub {
1410 my ($macro_name, $param, $verify, $ipversion) = @_;
1412 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1413 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1415 if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1416 $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1419 # skip macros which are specific to another ipversion
1420 if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1421 return if $ipversion != $required;
1426 foreach my $templ (@$macro_rules) {
1428 my $param_used = {};
1429 foreach my $k (keys %$templ) {
1430 my $v = $templ->{$k};
1431 if ($v eq 'PARAM') {
1433 $param_used->{$k} = 1;
1434 } elsif ($v eq 'DEST') {
1435 $v = $param->{dest
};
1436 $param_used->{dest
} = 1;
1437 } elsif ($v eq 'SOURCE') {
1438 $v = $param->{source
};
1439 $param_used->{source
} = 1;
1443 my $msg = "missing parameter '$k' in macro '$macro_name'";
1444 raise_param_exc
({ macro => $msg }) if $verify;
1449 foreach my $k (keys %$param) {
1450 next if $k eq 'macro';
1451 next if !defined($param->{$k});
1452 next if $param_used->{$k};
1453 if (defined($rule->{$k})) {
1454 if ($rule->{$k} ne $param->{$k}) {
1455 my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1456 raise_param_exc
({ $k => $msg }) if $verify;
1460 $rule->{$k} = $param->{$k};
1463 push @$rules, $rule;
1469 my $rule_env_iface_lookup = {
1478 my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1480 my $allow_groups = $rule_env eq 'group' ?
0 : 1;
1482 my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1483 die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1485 my $errors = $rule->{errors
} || {};
1487 my $error_count = 0;
1489 my $add_error = sub {
1490 my ($param, $msg) = @_;
1492 raise_param_exc
({ $param => $msg }) if !$noerr;
1494 $errors->{$param} = $msg if !$errors->{$param};
1498 my $set_ip_version = sub {
1501 die "detected mixed ipv4/ipv6 adresses in rule\n"
1502 if $ipversion && ($vers != $ipversion);
1507 my $check_ipset_or_alias_property = sub {
1508 my ($name, $expected_ipversion) = @_;
1510 if (my $value = $rule->{$name}) {
1511 if ($value =~ m/^\+/) {
1512 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1513 &$add_error($name, "no such ipset '$1'")
1514 if !($cluster_conf->{ipset
}->{$1} || ($fw_conf && $fw_conf->{ipset
}->{$1}));
1517 &$add_error($name, "invalid ipset name '$value'");
1519 } elsif ($value =~ m/^${ip_alias_pattern}$/){
1520 my $alias = lc($value);
1521 &$add_error($name, "no such alias '$value'")
1522 if !($cluster_conf->{aliases
}->{$alias} || ($fw_conf && $fw_conf->{aliases
}->{$alias}));
1523 my $e = $fw_conf ?
$fw_conf->{aliases
}->{$alias} : undef;
1524 $e = $cluster_conf->{aliases
}->{$alias} if !$e && $cluster_conf;
1526 &$set_ip_version($e->{ipversion
});
1531 my $type = $rule->{type
};
1532 my $action = $rule->{action
};
1534 &$add_error('type', "missing property") if !$type;
1535 &$add_error('action', "missing property") if !$action;
1538 if ($type eq 'in' || $type eq 'out') {
1539 &$add_error('action', "unknown action '$action'")
1540 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1541 } elsif ($type eq 'group') {
1542 &$add_error('type', "security groups not allowed")
1544 &$add_error('action', "invalid characters in security group name")
1545 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1547 &$add_error('type', "unknown rule type '$type'");
1551 if ($rule->{iface
}) {
1552 &$add_error('type', "parameter -i not allowed for this rule type")
1554 eval { PVE
::JSONSchema
::pve_verify_iface
($rule->{iface
}); };
1555 &$add_error('iface', $@) if $@;
1556 if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1557 &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1558 if $rule->{iface
} !~ m/^net(\d+)$/;
1562 if ($rule->{macro}) {
1563 if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1564 $rule->{macro} = $preferred_name;
1566 &$add_error('macro', "unknown macro '$rule->{macro}'");
1570 if ($rule->{proto
}) {
1571 eval { pve_fw_verify_protocol_spec
($rule->{proto
}); };
1572 &$add_error('proto', $@) if $@;
1573 &$set_ip_version(4) if $rule->{proto
} eq 'icmp';
1574 &$set_ip_version(6) if $rule->{proto
} eq 'icmpv6';
1577 if ($rule->{dport
}) {
1578 eval { parse_port_name_number_or_range
($rule->{dport
}, 1); };
1579 &$add_error('dport', $@) if $@;
1580 my $proto = $rule->{proto
};
1581 &$add_error('proto', "missing property - 'dport' requires this property")
1583 &$add_error('dport', "protocol '$proto' does not support ports")
1584 if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1585 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1588 if ($rule->{sport
}) {
1589 eval { parse_port_name_number_or_range
($rule->{sport
}, 0); };
1590 &$add_error('sport', $@) if $@;
1591 my $proto = $rule->{proto
};
1592 &$add_error('proto', "missing property - 'sport' requires this property")
1594 &$add_error('sport', "protocol '$proto' does not support ports")
1595 if !$PROTOCOLS_WITH_PORTS->{$proto};
1598 if ($rule->{source
}) {
1600 my $source_ipversion = parse_address_list
($rule->{source
});
1601 &$set_ip_version($source_ipversion);
1603 &$add_error('source', $@) if $@;
1604 &$check_ipset_or_alias_property('source', $ipversion);
1607 if ($rule->{dest
}) {
1609 my $dest_ipversion = parse_address_list
($rule->{dest
});
1610 &$set_ip_version($dest_ipversion);
1612 &$add_error('dest', $@) if $@;
1613 &$check_ipset_or_alias_property('dest', $ipversion);
1616 $rule->{ipversion
} = $ipversion if $ipversion;
1618 if ($rule->{macro} && !$error_count) {
1619 eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1621 if (ref($err) eq "PVE::Exception" && $err->{errors
}) {
1622 my $eh = $err->{errors
};
1623 foreach my $p (keys %$eh) {
1624 &$add_error($p, $eh->{$p});
1627 &$add_error('macro', "$err");
1632 $rule->{errors
} = $errors if $error_count;
1637 sub copy_rule_data
{
1638 my ($rule, $param) = @_;
1640 foreach my $k (keys %$rule_properties) {
1641 if (defined(my $v = $param->{$k})) {
1642 if ($v eq '' || $v eq '-') {
1653 sub rules_modify_permissions
{
1654 my ($rule_env) = @_;
1656 if ($rule_env eq 'host') {
1658 check
=> ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1660 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1662 check
=> ['perm', '/', [ 'Sys.Modify' ]],
1664 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1666 check
=> ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1673 sub rules_audit_permissions
{
1674 my ($rule_env) = @_;
1676 if ($rule_env eq 'host') {
1678 check
=> ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1680 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1682 check
=> ['perm', '/', [ 'Sys.Audit' ]],
1684 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1686 check
=> ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1694 my $bridge_firewall_enabled = 0;
1696 sub enable_bridge_firewall
{
1698 return if $bridge_firewall_enabled; # only once
1700 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1701 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1703 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1704 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/ipv4/tcp_syncookies", "1");
1706 $bridge_firewall_enabled = 1;
1709 sub iptables_restore_cmdlist
{
1712 run_command
("/sbin/iptables-restore -n", input
=> $cmdlist, errmsg
=> "iptables_restore_cmdlist");
1715 sub ip6tables_restore_cmdlist
{
1718 run_command
("/sbin/ip6tables-restore -n", input
=> $cmdlist, errmsg
=> "iptables_restore_cmdlist");
1721 sub ipset_restore_cmdlist
{
1724 run_command
("/sbin/ipset restore", input
=> $cmdlist, errmsg
=> "ipset_restore_cmdlist");
1727 sub ebtables_restore_cmdlist
{
1730 run_command
("/sbin/ebtables-restore", input
=> $cmdlist, errmsg
=> "ebtables_restore_cmdlist");
1733 sub iptables_get_chains
{
1734 my ($iptablescmd) = @_;
1736 $iptablescmd = "iptables" if !$iptablescmd;
1740 # check what chains we want to track
1741 my $is_pvefw_chain = sub {
1744 return 1 if $name =~ m/^PVEFW-\S+$/;
1746 return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1748 return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1750 return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1751 return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1763 return if $line =~ m/^#/;
1764 return if $line =~ m/^\s*$/;
1766 if ($line =~ m/^\*(\S+)$/) {
1771 return if $table ne 'filter';
1773 if ($line =~ m/^:(\S+)\s/) {
1775 return if !&$is_pvefw_chain($chain);
1776 $res->{$chain} = "unknown";
1777 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1778 my ($chain, $sig) = ($1, $2);
1779 return if !&$is_pvefw_chain($chain);
1780 $res->{$chain} = $sig;
1781 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1784 # simply ignore the rest
1789 run_command
("/sbin/$iptablescmd-save", outfunc
=> $parser);
1791 return wantarray ?
($res, $hooks) : $res;
1794 sub iptables_chain_digest
{
1796 my $digest = Digest
::SHA-
>new('sha1');
1797 foreach my $rule (@$rules) { # order is important
1798 $digest->add($rule);
1800 return $digest->b64digest;
1803 sub ipset_chain_digest
{
1806 my $digest = Digest
::SHA-
>new('sha1');
1807 foreach my $rule (sort @$rules) { # note: sorted
1808 $digest->add($rule);
1810 return $digest->b64digest;
1813 sub ipset_get_chains
{
1821 return if $line =~ m/^#/;
1822 return if $line =~ m/^\s*$/;
1823 if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1825 $line =~ s/\s+$//; # delete trailing white space
1826 push @{$chains->{$chain}}, $line;
1828 # simply ignore the rest
1833 run_command
("/sbin/ipset save", outfunc
=> $parser);
1835 # compute digest for each chain
1836 foreach my $chain (keys %$chains) {
1837 $res->{$chain} = ipset_chain_digest
($chains->{$chain});
1843 sub ebtables_get_chains
{
1849 return if $line =~ m/^#/;
1850 return if $line =~ m/^\s*$/;
1851 if ($line =~ m/^:(\S+)\s\S+$/) {
1852 # Make sure we know chains exist even if they're empty.
1853 $chains->{$1} //= [];
1854 } elsif ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
1857 push @{$chains->{$chain}}, $line;
1859 # simply ignore the rest
1864 run_command
("/sbin/ebtables-save", outfunc
=> $parser);
1865 # compute digest for each chain and store rules as well
1866 foreach my $chain (keys %$chains) {
1867 $res->{$chain}->{rules
} = $chains->{$chain};
1868 $res->{$chain}->{sig
} = iptables_chain_digest
($chains->{$chain});
1873 # substitude action of rule according to action hash
1874 sub rule_substitude_action
{
1875 my ($rule, $actions) = @_;
1877 if (my $action = $rule->{action
}) {
1878 $rule->{action
} = $actions->{$action} if defined($actions->{$action});
1882 # generate a src or dst match
1883 # $dir(ection) is either d or s
1884 sub ipt_gen_src_or_dst_match
{
1885 my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
1890 } elsif ($dir eq 'd') {
1893 die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
1897 if ($adr =~ m/^\+/) {
1898 if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
1901 if ($fw_conf && $fw_conf->{ipset
}->{$name}) {
1902 $ipset_chain = compute_ipset_chain_name
($fw_conf->{vmid
}, $name, $ipversion);
1903 } elsif ($cluster_conf && $cluster_conf->{ipset
}->{$name}) {
1904 $ipset_chain = compute_ipset_chain_name
(0, $name, $ipversion);
1906 die "no such ipset '$name'\n";
1908 $match = "-m set --match-set ${ipset_chain} ${srcdst}";
1910 die "invalid security group name '$adr'\n";
1912 } elsif ($adr =~ m/^${ip_alias_pattern}$/){
1913 my $alias = lc($adr);
1914 my $e = $fw_conf ?
$fw_conf->{aliases
}->{$alias} : undef;
1915 $e = $cluster_conf->{aliases
}->{$alias} if !$e && $cluster_conf;
1916 die "no such alias '$adr'\n" if !$e;
1917 $match = "-${dir} $e->{cidr}";
1918 } elsif ($adr =~ m/\-/){
1919 $match = "-m iprange --${srcdst}-range $adr";
1921 $match = "-${dir} $adr";
1927 # convert a %rule to an array of iptables commands
1928 sub ipt_rule_to_cmds
{
1929 my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
1931 die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
1935 if (defined $rule->{match
}) {
1936 push @match, $rule->{match
};
1938 push @match, "-i $rule->{iface_in}" if $rule->{iface_in
};
1939 push @match, "-o $rule->{iface_out}" if $rule->{iface_out
};
1941 if ($rule->{source
}) {
1942 push @match, ipt_gen_src_or_dst_match
($rule->{source
}, 's', $ipversion, $cluster_conf, $fw_conf);
1944 if ($rule->{dest
}) {
1945 push @match, ipt_gen_src_or_dst_match
($rule->{dest
}, 'd', $ipversion, $cluster_conf, $fw_conf);
1948 if (my $proto = $rule->{proto
}) {
1949 push @match, "-p $proto";
1951 my $multidport = defined($rule->{dport
}) && parse_port_name_number_or_range
($rule->{dport
}, 1);
1952 my $multisport = defined($rule->{sport
}) && parse_port_name_number_or_range
($rule->{sport
}, 0);
1954 my $add_dport = sub {
1955 return if !$rule->{dport
};
1957 if ($proto eq 'icmp') {
1958 # Note: we use dport to store --icmp-type
1959 die "unknown icmp-type '$rule->{dport}'\n"
1960 if $rule->{dport
} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport
}});
1961 push @match, "-m icmp --icmp-type $rule->{dport}";
1962 } elsif ($proto eq 'icmpv6') {
1963 # Note: we use dport to store --icmpv6-type
1964 die "unknown icmpv6-type '$rule->{dport}'\n"
1965 if $rule->{dport
} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport
}});
1966 push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
1967 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
1968 die "protocol $proto does not have ports\n";
1969 } elsif ($multidport) {
1970 push @match, "--match multiport", "--dports $rule->{dport}";
1972 push @match, "--dport $rule->{dport}";
1976 my $add_sport = sub {
1977 return if !$rule->{sport
};
1979 die "protocol $proto does not have ports\n"
1980 if !$PROTOCOLS_WITH_PORTS->{$proto};
1982 push @match, "--match multiport", "--sports $rule->{sport}";
1984 push @match, "--sport $rule->{sport}";
1988 # order matters - single port before multiport!
1989 $add_dport->() if $multisport;
1991 $add_dport->() if !$multisport;
1992 } elsif ($rule->{dport
} || $rule->{sport
}) {
1993 die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport
};
1994 die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport
};
1997 push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype
};
1999 my $matchstr = scalar(@match) ?
join(' ', @match) : "";
2002 if (defined $rule->{target
}) {
2003 $targetstr = $rule->{target
};
2005 my $action = (defined $rule->{action
}) ?
$rule->{action
} : "";
2006 my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
2007 $targetstr = ($goto) ?
"-g $action" : "-j $action";
2011 if (defined $rule->{log} && $rule->{log}) {
2012 my $logaction = get_log_rule_base
($chain, $vmid, $rule->{logmsg
}, $rule->{log});
2013 push @iptcmds, "-A $chain $matchstr $logaction";
2015 push @iptcmds, "-A $chain $matchstr $targetstr";
2019 sub ruleset_generate_rule
{
2020 my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf) = @_;
2024 if ($rule->{macro}) {
2025 $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
2030 # update all or nothing
2032 foreach my $r (@$rules) {
2033 push @ipt_rule_cmds, ipt_rule_to_cmds
($r, $chain, $ipversion, $cluster_conf, $fw_conf);
2035 foreach my $c (@ipt_rule_cmds) {
2036 ruleset_add_ipt_cmd
($ruleset, $chain, $c);
2040 sub ruleset_create_chain
{
2041 my ($ruleset, $chain) = @_;
2043 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
2044 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
2046 die "chain '$chain' already exists\n" if $ruleset->{$chain};
2048 $ruleset->{$chain} = [];
2051 sub ruleset_chain_exist
{
2052 my ($ruleset, $chain) = @_;
2054 return $ruleset->{$chain} ?
1 : undef;
2057 # add an iptables command (like generated by ipt_rule_to_cmds) to a chain
2058 sub ruleset_add_ipt_cmd
{
2059 my ($ruleset, $chain, $iptcmd) = @_;
2061 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2063 push @{$ruleset->{$chain}}, $iptcmd;
2066 sub ruleset_addrule
{
2067 my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
2069 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2071 if (defined($log) && $log) {
2072 my $logaction = get_log_rule_base
($chain, $vmid, $logmsg, $log);
2073 push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
2075 # for stable ebtables digests avoid double-spaces to match ebtables-save output
2076 $match .= ' ' if length($match);
2077 push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
2080 sub ruleset_insertrule
{
2081 my ($ruleset, $chain, $match, $action, $log) = @_;
2083 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2085 unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2088 sub get_log_rule_base
{
2089 my ($chain, $vmid, $msg, $loglevel) = @_;
2091 $vmid = 0 if !defined($vmid);
2092 $msg = "" if !defined($msg);
2094 # Note: we use special format for prefix to pass further
2095 # info to log daemon (VMID, LOGLEVEL and CHAIN)
2097 return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2100 sub ruleset_add_chain_policy {
2101 my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2103 if ($policy eq 'ACCEPT') {
2105 my $rule = { action => 'ACCEPT' };
2106 rule_substitude_action($rule, { ACCEPT => $accept_action});
2107 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2109 } elsif ($policy eq 'DROP') {
2111 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop
");
2113 ruleset_addrule($ruleset, $chain, "", "-j DROP
", $loglevel, "policy
$policy: ", $vmid);
2114 } elsif ($policy eq 'REJECT') {
2115 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject
");
2117 ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject
", $loglevel, "policy
$policy: ", $vmid);
2120 die "internal error
: unknown policy
'$policy'";
2124 sub ruleset_chain_add_ndp {
2125 my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2126 return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2128 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-solicitation
", $accept);
2129 if ($direction ne 'OUT' || $options->{radv}) {
2130 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-advertisement
", $accept);
2132 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type neighbor-solicitation
", $accept);
2133 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type neighbor-advertisement
", $accept);
2136 sub ruleset_chain_add_conn_filters {
2137 my ($ruleset, $chain, $allow_invalid, $accept) = @_;
2139 if (!$allow_invalid) {
2140 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
", "-j DROP
");
2142 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
", "-j
$accept");
2145 sub ruleset_chain_add_input_filters {
2146 my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2148 if ($cluster_conf->{ipset}->{blacklist}){
2149 if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist
")) {
2150 ruleset_create_chain($ruleset, "PVEFW-blacklist
");
2151 ruleset_addrule($ruleset, "PVEFW-blacklist
", "", "-j DROP
", $loglevel, "DROP
: ");
2153 my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2154 ruleset_addrule($ruleset, $chain, "-m set
--match-set
${ipset_chain
} src
", "-j PVEFW-blacklist
");
2157 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2158 if ($ipversion == 4) {
2159 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
,NEW
", "-j PVEFW-smurfs
");
2163 if ($options->{tcpflags}) {
2164 ruleset_addrule($ruleset, $chain, "-p tcp
", "-j PVEFW-tcpflags
");
2168 sub ruleset_create_vm_chain {
2169 my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2171 ruleset_create_chain($ruleset, $chain);
2172 my $accept = generate_nfqueue($options);
2174 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2175 if ($ipversion == 4) {
2176 if ($direction eq 'OUT') {
2177 ruleset_generate_rule($ruleset, $chain, $ipversion,
2178 { action => 'PVEFW-SET-ACCEPT-MARK',
2179 proto => 'udp', sport => 68, dport => 67 });
2181 ruleset_generate_rule($ruleset, $chain, $ipversion,
2182 { action => 'ACCEPT',
2183 proto => 'udp', sport => 67, dport => 68 });
2185 } elsif ($ipversion == 6) {
2186 if ($direction eq 'OUT') {
2187 ruleset_generate_rule($ruleset, $chain, $ipversion,
2188 { action => 'PVEFW-SET-ACCEPT-MARK',
2189 proto => 'udp', sport => 546, dport => 547 });
2191 ruleset_generate_rule($ruleset, $chain, $ipversion,
2192 { action => 'ACCEPT',
2193 proto => 'udp', sport => 547, dport => 546 });
2199 if ($direction eq 'OUT') {
2200 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2201 ruleset_addrule($ruleset, $chain, "-m mac
! --mac-source
$macaddr", "-j DROP
");
2203 if ($ipversion == 6 && !$options->{radv}) {
2204 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-advertisement
", "-j DROP
");
2206 if ($ipfilter_ipset) {
2207 ruleset_addrule($ruleset, $chain, "-m set
! --match-set
$ipfilter_ipset src
", "-j DROP
");
2209 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2212 my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j
$accept";
2213 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2216 sub ruleset_add_group_rule {
2217 my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2219 my $group = $rule->{action};
2220 my $group_chain = "GROUP-
$group-$direction";
2221 if(!ruleset_chain_exist($ruleset, $group_chain)){
2222 generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2225 if ($direction eq 'OUT' && $rule->{iface_out}) {
2226 ruleset_addrule($ruleset, $chain, "-o
$rule->{iface_out
}", "-j
$group_chain");
2227 } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2228 ruleset_addrule($ruleset, $chain, "-i
$rule->{iface_in
}", "-j
$group_chain");
2230 ruleset_addrule($ruleset, $chain, "", "-j
$group_chain");
2233 ruleset_addrule($ruleset, $chain, "-m mark
--mark
$FWACCEPTMARK_ON", "-j
$action");
2236 sub ruleset_generate_vm_rules {
2237 my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
2239 my $lc_direction = lc($direction);
2241 my $in_accept = generate_nfqueue($options);
2243 foreach my $rule (@$rules) {
2244 next if $rule->{iface} && $rule->{iface} ne $netid;
2245 next if !$rule->{enable} || $rule->{errors};
2246 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2248 if ($rule->{type} eq 'group') {
2249 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2250 $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2252 next if $rule->{type} ne $lc_direction;
2254 if ($direction eq 'OUT') {
2255 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" });
2256 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf);
2258 rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject
" });
2259 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf);
2267 sub generate_nfqueue {
2270 if ($options->{ips}) {
2271 my $action = "NFQUEUE
";
2272 if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2273 if (defined($3) && defined($1)) {
2274 $action .= " --queue-balance
$1:$3";
2275 } elsif (defined($1)) {
2276 $action .= " --queue-num
$1";
2279 $action .= " --queue-bypass
" if $feature_ipset_nomatch; #need kernel 3.10
2286 sub ruleset_generate_vm_ipsrules {
2287 my ($ruleset, $options, $direction, $iface) = @_;
2289 if ($options->{ips} && $direction eq 'IN') {
2290 my $nfqueue = generate_nfqueue($options);
2292 if (!ruleset_chain_exist($ruleset, "PVEFW-IPS
")) {
2293 ruleset_create_chain($ruleset, "PVEFW-IPS
");
2296 ruleset_addrule($ruleset, "PVEFW-IPS
", "-m physdev
--physdev-out
$iface --physdev-is-bridged
", "-j
$nfqueue");
2300 sub generate_tap_rules_direction {
2301 my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2303 my $lc_direction = lc($direction);
2305 my $rules = $vmfw_conf->{rules};
2307 my $options = $vmfw_conf->{options};
2308 my $loglevel = get_option_log_level($options, "log_level_
${lc_direction
}");
2310 my $tapchain = "$iface-$direction";
2312 my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2313 my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2314 if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2316 # create chain with mac and ip filter
2317 ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2319 if ($options->{enable}) {
2320 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2322 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2327 if ($direction eq 'OUT') {
2328 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2330 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2333 my $accept = generate_nfqueue($options);
2334 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : $accept;
2335 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2337 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : 'ACCEPT';
2338 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2341 # plug the tap chain to bridge chain
2342 if ($direction eq 'IN') {
2343 ruleset_addrule($ruleset, "PVEFW-FWBR-IN
",
2344 "-m physdev
--physdev-is-bridged
--physdev-out
$iface", "-j
$tapchain");
2346 ruleset_addrule($ruleset, "PVEFW-FWBR-OUT
",
2347 "-m physdev
--physdev-is-bridged
--physdev-in
$iface", "-j
$tapchain");
2351 sub enable_host_firewall {
2352 my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2354 my $options = $hostfw_conf->{options};
2355 my $cluster_options = $cluster_conf->{options};
2356 my $rules = $hostfw_conf->{rules};
2357 my $cluster_rules = $cluster_conf->{rules};
2359 # host inbound firewall
2360 my $chain = "PVEFW-HOST-IN
";
2361 ruleset_create_chain($ruleset, $chain);
2363 my $loglevel = get_option_log_level($options, "log_level_in
");
2365 ruleset_addrule($ruleset, $chain, "-i lo
", "-j ACCEPT
");
2367 ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2368 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2369 ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2371 # we use RETURN because we need to check also tap rules
2372 my $accept_action = 'RETURN';
2374 ruleset_addrule($ruleset, $chain, "-p igmp
", "-j
$accept_action"); # important for multicast
2376 # add host rules first, so that cluster wide rules can be overwritten
2377 foreach my $rule (@$rules, @$cluster_rules) {
2378 next if !$rule->{enable} || $rule->{errors};
2379 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2381 $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2384 if ($rule->{type} eq 'group') {
2385 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2386 } elsif ($rule->{type} eq 'in') {
2387 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" });
2388 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf);
2392 delete $rule->{iface_in};
2395 # allow standard traffic for management ipset (includes cluster network)
2396 my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management
", $ipversion);
2397 my $mngmntsrc = "-m set
--match-set
${mngmnt_ipset_chain
} src
";
2398 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
8006", "-j
$accept_action"); # PVE API
2399 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
5900:5999", "-j
$accept_action"); # PVE VNC Console
2400 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
3128", "-j
$accept_action"); # SPICE Proxy
2401 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
22", "-j
$accept_action"); # SSH
2403 my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2404 my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2407 if ($localnet && ($ipversion == $localnet_ver)) {
2408 my $corosync_rule = "-p udp
--dport
5404:5405";
2409 ruleset_addrule($ruleset, $chain, "-s
$localnet -d
$localnet $corosync_rule", "-j
$accept_action");
2410 ruleset_addrule($ruleset, $chain, "-s
$localnet -m addrtype
--dst-type MULTICAST
$corosync_rule", "-j
$accept_action");
2413 # implement input policy
2414 my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2415 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2417 # host outbound firewall
2418 $chain = "PVEFW-HOST-OUT
";
2419 ruleset_create_chain($ruleset, $chain);
2421 $loglevel = get_option_log_level($options, "log_level_out
");
2423 ruleset_addrule($ruleset, $chain, "-o lo
", "-j ACCEPT
");
2425 ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2427 # we use RETURN because we may want to check other thigs later
2428 $accept_action = 'RETURN';
2429 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j
$accept_action");
2431 ruleset_addrule($ruleset, $chain, "-p igmp
", "-j
$accept_action"); # important for multicast
2433 # add host rules first, so that cluster wide rules can be overwritten
2434 foreach my $rule (@$rules, @$cluster_rules) {
2435 next if !$rule->{enable} || $rule->{errors};
2436 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2438 $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2440 if ($rule->{type} eq 'group') {
2441 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2442 } elsif ($rule->{type} eq 'out') {
2443 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" });
2444 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf);
2448 delete $rule->{iface_out};
2451 # allow standard traffic on cluster network
2452 if ($localnet && ($ipversion == $localnet_ver)) {
2453 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
8006", "-j
$accept_action"); # PVE API
2454 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
22", "-j
$accept_action"); # SSH
2455 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
5900:5999", "-j
$accept_action"); # PVE VNC Console
2456 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
3128", "-j
$accept_action"); # SPICE Proxy
2458 my $corosync_rule = "-p udp
--dport
5404:5405";
2459 ruleset_addrule($ruleset, $chain, "-d
$localnet $corosync_rule", "-j
$accept_action");
2460 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
$corosync_rule", "-j
$accept_action");
2463 # implement output policy
2464 $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2465 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2467 ruleset_addrule($ruleset, "PVEFW-OUTPUT
", "", "-j PVEFW-HOST-OUT
");
2468 ruleset_addrule($ruleset, "PVEFW-INPUT
", "", "-j PVEFW-HOST-IN
");
2471 sub generate_group_rules {
2472 my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2474 my $rules = $cluster_conf->{groups}->{$group};
2477 warn "no such security group
'$group'\n";
2478 $rules = []; # create empty chain
2481 my $chain = "GROUP-
${group
}-IN
";
2483 ruleset_create_chain($ruleset, $chain);
2484 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2486 foreach my $rule (@$rules) {
2487 next if $rule->{type} ne 'in';
2488 next if !$rule->{enable} || $rule->{errors};
2489 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2490 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" });
2491 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2494 $chain = "GROUP-
${group
}-OUT
";
2496 ruleset_create_chain($ruleset, $chain);
2497 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2499 foreach my $rule (@$rules) {
2500 next if $rule->{type} ne 'out';
2501 next if !$rule->{enable} || $rule->{errors};
2502 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2503 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2504 # check also other tap rules later
2505 rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject
" });
2506 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2511 my $valid_netdev_names = {};
2512 for (my $i = 0; $i < $MAX_NETS; $i++) {
2513 $valid_netdev_names->{"net
$i"} = 1;
2516 sub get_mark_values {
2517 my ($value, $mask) = @_;
2518 $value = hex($value) if $value =~ /^0x/;
2519 $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2520 $mask = 0xffffffff if !defined($mask);
2521 return ($value, $mask);
2525 my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2527 my $orig_line = $line;
2531 # we can add single line comments to the end of the rule
2532 if ($line =~ s/#\s*(.*?)\s*$//) {
2533 $rule->{comment} = decode('utf8', $1);
2536 # we can disable a rule when prefixed with '|'
2538 $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2540 $line =~ s/^(\S+)\s+(\S+)\s*// ||
2541 die "unable to parse rule
: $line\n";
2543 $rule->{type} = lc($1);
2544 $rule->{action} = $2;
2546 if ($rule->{type} eq 'in' || $rule->{type} eq 'out') {
2547 if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2548 $rule->{macro} = $1;
2549 $rule->{action} = $2;
2553 while (length($line)) {
2554 if ($line =~ s/^-i (\S+)\s*//) {
2555 $rule->{iface} = $1;
2559 last if $rule->{type} eq 'group';
2561 if ($line =~ s/^-p (\S+)\s*//) {
2562 $rule->{proto} = $1;
2566 if ($line =~ s/^-dport (\S+)\s*//) {
2567 $rule->{dport} = $1;
2571 if ($line =~ s/^-sport (\S+)\s*//) {
2572 $rule->{sport} = $1;
2575 if ($line =~ s/^-source (\S+)\s*//) {
2576 $rule->{source} = $1;
2579 if ($line =~ s/^-dest (\S+)\s*//) {
2587 die "unable to parse rule parameters
: $line\n" if length($line);
2589 $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2590 if ($rule->{errors}) {
2591 # The verbose flag really means we're running from the CLI and want
2592 # output on the console - in the other case we really want such errors
2593 # to go into the syslog instead.
2594 my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2595 $log->("$prefix - errors
in rule parameters
: $orig_line\n");
2596 foreach my $p (keys %{$rule->{errors}}) {
2597 $log->(" $p: $rule->{errors
}->{$p}\n");
2604 sub verify_ethertype {
2606 my $types = get_etc_ethertypes();
2607 die "unknown ethernet protocol type
: $value\n"
2608 if !defined($types->{byname}->{$value}) &&
2609 !defined($types->{byid}->{$value});
2612 sub parse_vmfw_option {
2617 my $loglevels = "emerg
|alert
|crit
|err
|warning
|notice
|info
|debug
|nolog
";
2619 if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2622 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2624 $value = $2 ? lc($3) : '';
2625 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2628 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2631 } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
2634 verify_ethertype($_) foreach split(/\s*,\s*/, $value);
2636 die "can
't parse option '$line'\n"
2639 return ($opt, $value);
2642 sub parse_hostfw_option {
2647 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2649 if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid):\s*(0|1)\s*$/i) {
2652 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2654 $value = $2 ? lc($3) : '';
2655 } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2659 die "can't parse option
'$line'\n"
2662 return ($opt, $value);
2665 sub parse_clusterfw_option {
2670 if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2673 if (($value > 1) && ((time() - $value) > 60)) {
2676 } elsif ($line =~ m/^(ebtables):\s*(0|1)\s*$/i) {
2679 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2683 die "can
't parse option '$line'\n"
2686 return ($opt, $value);
2690 my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2692 my $alias = lc($cidr);
2693 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2694 $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2696 die "no such alias '$cidr'\n" if !$e;;
2698 return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2701 sub parse_ip_or_cidr {
2706 if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2709 } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2713 die "value does not look like a valid IP address or CIDR network\n";
2716 return wantarray ? ($cidr, $ipversion) : $cidr;
2722 # we can add single line comments to the end of the line
2723 my $comment = decode('utf8
', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2725 if ($line =~ m/^(\S+)\s(\S+)$/) {
2726 my ($name, $cidr) = ($1, $2);
2729 ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2734 ipversion => $ipversion,
2736 $data->{comment} = $comment if $comment;
2743 sub generic_fw_config_parser {
2744 my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2749 my $res = $empty_conf;
2751 while (defined(my $line = <$fh>)) {
2752 next if $line =~ m/^#/;
2753 next if $line =~ m/^\s*$/;
2757 my $linenr = $fh->input_line_number();
2758 my $prefix = "$filename (line $linenr)";
2760 if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2761 $section = 'options
';
2765 if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2766 $section = 'aliases
';
2770 if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2771 $section = 'groups
';
2775 die "security group name too long\n" if length($group) > $max_group_name_length;
2776 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2779 ($section, $group, $comment) = undef;
2780 warn "$prefix: $err";
2784 $res->{$section}->{$group} = [];
2785 $res->{group_comments}->{$group} = decode('utf8
', $comment)
2790 if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2795 if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2800 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2801 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2804 ($section, $group, $comment) = undef;
2805 warn "$prefix: $err";
2809 $res->{$section}->{$group} = [];
2810 $res->{ipset_comments}->{$group} = decode('utf8
', $comment)
2816 warn "$prefix: skip line - no section\n";
2820 if ($section eq 'options
') {
2823 if ($rule_env eq 'cluster
') {
2824 ($opt, $value) = parse_clusterfw_option($line);
2825 } elsif ($rule_env eq 'host
') {
2826 ($opt, $value) = parse_hostfw_option($line);
2828 ($opt, $value) = parse_vmfw_option($line);
2830 $res->{options}->{$opt} = $value;
2832 warn "$prefix: $@" if $@;
2833 } elsif ($section eq 'aliases
') {
2835 my $data = parse_alias($line);
2836 $res->{aliases}->{lc($data->{name})} = $data;
2838 warn "$prefix: $@" if $@;
2839 } elsif ($section eq 'rules
') {
2841 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2843 warn "$prefix: $err";
2846 push @{$res->{$section}}, $rule;
2847 } elsif ($section eq 'groups
') {
2849 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group
', $verbose); };
2851 warn "$prefix: $err";
2854 push @{$res->{$section}->{$group}}, $rule;
2855 } elsif ($section eq 'ipset
') {
2856 # we can add single line comments to the end of the rule
2857 my $comment = decode('utf8
', $1) if $line =~ s/#\s*(.*?)\s*$//;
2859 $line =~ m/^(\!)?\s*(\S+)\s*$/;
2864 if ($nomatch && !$feature_ipset_nomatch) {
2865 $errors->{nomatch} = "nomatch not supported by kernel";
2869 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2870 resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2872 $cidr = parse_ip_or_cidr($cidr);
2877 $errors->{cidr} = $err;
2880 if ($cidr =~ m!/0+$!) {
2881 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
2884 my $entry = { cidr => $cidr };
2885 $entry->{nomatch} = 1 if $nomatch;
2886 $entry->{comment} = $comment if $comment;
2887 $entry->{errors} = $errors if $errors;
2889 if ($verbose && $errors) {
2890 warn "$prefix - errors in ipset '$group': $line\n";
2891 foreach my $p (keys %{$errors}) {
2892 warn " $p: $errors->{$p}\n";
2896 push @{$res->{$section}->{$group}}, $entry;
2898 warn "$prefix: skip line - unknown section\n";
2906 sub parse_hostfw_config {
2907 my ($filename, $fh, $cluster_conf, $verbose) = @_;
2909 my $empty_conf = { rules => [], options => {}};
2911 return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host
');
2914 sub parse_vmfw_config {
2915 my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2922 ipset_comments => {},
2925 return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2928 sub parse_clusterfw_config {
2929 my ($filename, $fh, $verbose) = @_;
2939 group_comments => {},
2941 ipset_comments => {},
2944 return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster
');
2948 my ($code, @param) = @_;
2952 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2959 sub read_local_vm_config {
2964 my $vmdata = { qemu => $qemu, lxc => $lxc };
2966 my $vmlist = PVE::Cluster::get_vmlist();
2967 return $vmdata if !$vmlist || !$vmlist->{ids};
2968 my $ids = $vmlist->{ids};
2970 foreach my $vmid (keys %$ids) {
2971 next if !$vmid; # skip VE0
2972 my $d = $ids->{$vmid};
2973 next if !$d->{node} || $d->{node} ne $nodename;
2974 next if !$d->{type};
2975 if ($d->{type} eq 'qemu
') {
2976 if ($have_qemu_server) {
2977 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
2978 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2979 $qemu->{$vmid} = $conf;
2982 } elsif ($d->{type} eq 'lxc
') {
2984 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
2985 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2986 $lxc->{$vmid} = $conf;
2995 sub load_vmfw_conf {
2996 my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
3000 $dir = $pvefw_conf_dir if !defined($dir);
3002 my $filename = "$dir/$vmid.fw";
3003 if (my $fh = IO::File->new($filename, O_RDONLY)) {
3004 $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
3005 $vmfw_conf->{vmid} = $vmid;
3011 my $format_rules = sub {
3012 my ($rules, $allow_iface) = @_;
3016 foreach my $rule (@$rules) {
3017 if ($rule->{type} eq 'in' || $rule->{type} eq 'out
' || $rule->{type} eq 'group
') {
3018 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
3019 $raw .= uc($rule->{type});
3020 if ($rule->{macro}) {
3021 $raw .= " $rule->{macro}($rule->{action})";
3023 $raw .= " " . $rule->{action};
3025 if ($allow_iface && $rule->{iface}) {
3026 $raw .= " -i $rule->{iface}";
3029 if ($rule->{type} ne 'group
') {
3030 $raw .= " -source $rule->{source}" if $rule->{source};
3031 $raw .= " -dest $rule->{dest}" if $rule->{dest};
3032 $raw .= " -p $rule->{proto}" if $rule->{proto};
3033 $raw .= " -dport $rule->{dport}" if $rule->{dport};
3034 $raw .= " -sport $rule->{sport}" if $rule->{sport};
3037 $raw .= " # " . encode('utf8
', $rule->{comment})
3038 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
3041 die "unknown rule type '$rule->{type
}'";
3048 my $format_options = sub {
3053 $raw .= "[OPTIONS]\n\n";
3054 foreach my $opt (keys %$options) {
3055 $raw .= "$opt: $options->{$opt}\n";
3062 my $format_aliases = sub {
3067 $raw .= "[ALIASES]\n\n";
3068 foreach my $k (keys %$aliases) {
3069 my $e = $aliases->{$k};
3070 $raw .= "$e->{name} $e->{cidr}";
3071 $raw .= " # " . encode('utf8
', $e->{comment})
3072 if $e->{comment} && $e->{comment} !~ m/^\s*$/;
3080 my $format_ipsets = sub {
3085 foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
3086 if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
3087 my $utf8comment = encode('utf8
', $comment);
3088 $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3090 $raw .= "[IPSET $ipset]\n\n";
3092 my $options = $fw_conf->{ipset}->{$ipset};
3095 foreach my $entry (@$options) {
3096 $nethash->{$entry->{cidr}} = $entry;
3099 foreach my $cidr (sort keys %$nethash) {
3100 my $entry = $nethash->{$cidr};
3101 my $line = $entry->{nomatch} ? '!' : '';
3102 $line .= $entry->{cidr};
3103 $line .= " # " . encode('utf8
', $entry->{comment})
3104 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3114 sub save_vmfw_conf {
3115 my ($vmid, $vmfw_conf) = @_;
3119 my $options = $vmfw_conf->{options};
3120 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3122 my $aliases = $vmfw_conf->{aliases};
3123 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3125 $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
3127 my $rules = $vmfw_conf->{rules} || [];
3128 if ($rules && scalar(@$rules)) {
3129 $raw .= "[RULES]\n\n";
3130 $raw .= &$format_rules($rules, 1);
3134 my $filename = "$pvefw_conf_dir/$vmid.fw";
3136 mkdir $pvefw_conf_dir;
3137 PVE::Tools::file_set_contents($filename, $raw);
3143 sub remove_vmfw_conf {
3146 my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3148 unlink $vmfw_conffile;
3151 sub clone_vmfw_conf {
3152 my ($vmid, $newid) = @_;
3154 my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3155 my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3157 if (-f $clonevm_conffile) {
3158 unlink $clonevm_conffile;
3160 if (-f $sourcevm_conffile) {
3161 my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3162 PVE::Tools::file_set_contents($clonevm_conffile, $data);
3166 sub read_vm_firewall_configs {
3167 my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
3169 my $vmfw_configs = {};
3171 foreach my $vmid (keys %{$vmdata->{qemu}}) {
3172 my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm
', $vmid, $dir, $verbose);
3173 next if !$vmfw_conf->{options}; # skip if file does not exists
3174 $vmfw_configs->{$vmid} = $vmfw_conf;
3176 foreach my $vmid (keys %{$vmdata->{lxc}}) {
3177 my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct
', $vmid, $dir, $verbose);
3178 next if !$vmfw_conf->{options}; # skip if file does not exists
3179 $vmfw_configs->{$vmid} = $vmfw_conf;
3182 return $vmfw_configs;
3185 sub get_option_log_level {
3186 my ($options, $k) = @_;
3188 my $v = $options->{$k};
3189 $v = $default_log_level if !defined($v);
3191 return undef if $v eq '' || $v eq 'nolog
';
3193 $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
3195 return $v if ($v >= 0) && ($v <= 7);
3197 warn "unknown log level ($k = '$v')\n";
3202 sub generate_std_chains {
3203 my ($ruleset, $options, $ipversion) = @_;
3205 my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3207 my $loglevel = get_option_log_level($options, 'smurf_log_level
');
3208 my $chain = 'PVEFW-smurflog
';
3209 if ( $std_chains->{$chain} ) {
3210 foreach my $r (@{$std_chains->{$chain}}) {
3211 $r->{log} = $loglevel;
3215 # same as shorewall logflags action.
3216 $loglevel = get_option_log_level($options, 'tcp_flags_log_level
');
3217 $chain = 'PVEFW-logflags
';
3218 if ( $std_chains->{$chain} ) {
3219 foreach my $r (@{$std_chains->{$chain}}) {
3220 $r->{log} = $loglevel;
3224 foreach my $chain (keys %$std_chains) {
3225 ruleset_create_chain($ruleset, $chain);
3226 foreach my $rule (@{$std_chains->{$chain}}) {
3228 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
3230 die "rule $rule as string - should not happen";
3236 sub generate_ipset_chains {
3237 my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3239 foreach my $ipset (keys %{$ipsets}) {
3241 my $options = $ipsets->{$ipset};
3243 if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3244 if (my $ips = $device_ips->{$1}) {
3245 $options = [@$options, @$ips];
3251 foreach my $entry (@$options) {
3252 next if $entry->{errors}; # skip entries with errors
3255 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3256 ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3258 ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3260 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3262 # ip_compress_address takes an address only, no CIDR
3263 my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3264 $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3265 $cidr .= $prefix_len if defined($prefix_len);
3271 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3276 foreach my $ipversion (4, 6) {
3277 my $data = $nethash->{$ipversion};
3279 my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3281 my $hashsize = scalar(@$options);
3282 if ($hashsize <= 64) {
3285 $hashsize = round_powerof2($hashsize);
3288 my $family = $ipversion == "6" ? "inet6" : "inet";
3290 $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3292 foreach my $cidr (sort keys %$data) {
3293 my $entry = $data->{$cidr};
3295 my $cmd = "add $name $cidr";
3296 if ($entry->{nomatch}) {
3297 if ($feature_ipset_nomatch) {
3298 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3300 warn "ignore !$cidr - nomatch not supported by kernel\n";
3303 push @{$ipset_ruleset->{$name}}, $cmd;
3310 sub round_powerof2 {
3314 $int |= $int >> $_ foreach (1,2,4,8,16);
3318 sub load_clusterfw_conf {
3319 my ($filename, $verbose) = @_;
3321 $filename = $clusterfw_conf_filename if !defined($filename);
3323 my $cluster_conf = {};
3324 if (my $fh = IO::File->new($filename, O_RDONLY)) {
3325 $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3328 return $cluster_conf;
3331 sub save_clusterfw_conf {
3332 my ($cluster_conf) = @_;
3336 my $options = $cluster_conf->{options};
3337 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3339 my $aliases = $cluster_conf->{aliases};
3340 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3342 $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3344 my $rules = $cluster_conf->{rules};
3345 if ($rules && scalar(@$rules)) {
3346 $raw .= "[RULES]\n\n";
3347 $raw .= &$format_rules($rules, 1);
3351 if ($cluster_conf->{groups}) {
3352 foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3353 my $rules = $cluster_conf->{groups}->{$group};
3354 if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3355 my $utf8comment = encode('utf8
', $comment);
3356 $raw .= "[group $group] # $utf8comment\n\n";
3358 $raw .= "[group $group]\n\n";
3361 $raw .= &$format_rules($rules, 0);
3367 mkdir $pvefw_conf_dir;
3368 PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3370 unlink $clusterfw_conf_filename;
3374 sub load_hostfw_conf {
3375 my ($cluster_conf, $filename, $verbose) = @_;
3377 $filename = $hostfw_conf_filename if !defined($filename);
3379 my $hostfw_conf = {};
3380 if (my $fh = IO::File->new($filename, O_RDONLY)) {
3381 $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3383 return $hostfw_conf;
3386 sub save_hostfw_conf {
3387 my ($hostfw_conf) = @_;
3391 my $options = $hostfw_conf->{options};
3392 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3394 my $rules = $hostfw_conf->{rules};
3395 if ($rules && scalar(@$rules)) {
3396 $raw .= "[RULES]\n\n";
3397 $raw .= &$format_rules($rules, 1);
3402 PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3404 unlink $hostfw_conf_filename;
3409 my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3413 # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3414 $pve_std_chains = dclone($pve_std_chains_conf);
3416 if ($vmdata) { # test mode
3417 my $testdir = $vmdata->{testdir} || die "no test directory specified";
3418 my $filename = "$testdir/cluster.fw";
3419 $cluster_conf = load_clusterfw_conf($filename, $verbose);
3421 $filename = "$testdir/host.fw";
3422 $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3424 $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3425 } else { # normal operation
3426 $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3428 $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3430 $vmdata = read_local_vm_config();
3431 $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3434 return ({},{},{},{}) if !$cluster_conf->{options}->{enable};
3437 if ($cluster_conf->{aliases}->{local_network}) {
3438 $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3441 ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3443 $cluster_conf->{aliases}->{local_network} = {
3444 name => 'local_network
', cidr => $localnet, ipversion => $localnet_ver };
3447 push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3449 my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3450 my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3451 my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $verbose);
3452 my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3454 return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
3457 sub compile_iptables_filter {
3458 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3462 ruleset_create_chain($ruleset, "PVEFW-INPUT");
3463 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3465 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3467 my $hostfw_options = $hostfw_conf->{options} || {};
3469 # fixme: what log level should we use here?
3470 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3472 my $conn_allow_invalid = $hostfw_options->{nf_conntrack_allow_invalid} // 0;
3473 ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", $conn_allow_invalid, "ACCEPT");
3475 ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3476 ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3478 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3480 ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3481 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3483 generate_std_chains($ruleset, $hostfw_options, $ipversion);
3485 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3487 if ($hostfw_enable) {
3488 eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3489 warn $@ if $@; # just to be sure - should not happen
3492 # generate firewall rules for QEMU VMs
3493 foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3495 my $conf = $vmdata->{qemu}->{$vmid};
3496 my $vmfw_conf = $vmfw_configs->{$vmid};
3497 return if !$vmfw_conf;
3499 foreach my $netid (sort keys %$conf) {
3500 next if $netid !~ m/^net(\d+)$/;
3501 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3502 next if !$net->{firewall};
3503 my $iface = "tap${vmid}i$1";
3505 my $macaddr = $net->{macaddr};
3506 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3507 $vmfw_conf, $vmid, 'IN
', $ipversion);
3508 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3509 $vmfw_conf, $vmid, 'OUT
', $ipversion);
3512 warn $@ if $@; # just to be sure - should not happen
3515 # generate firewall rules for LXC containers
3516 foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3518 my $conf = $vmdata->{lxc}->{$vmid};
3519 my $vmfw_conf = $vmfw_configs->{$vmid};
3520 return if !$vmfw_conf;
3522 if ($vmfw_conf->{options}->{enable}) {
3523 foreach my $netid (sort keys %$conf) {
3524 next if $netid !~ m/^net(\d+)$/;
3525 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3526 next if !$net->{firewall};
3527 my $iface = "veth${vmid}i$1";
3528 my $macaddr = $net->{hwaddr};
3529 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3530 $vmfw_conf, $vmid, 'IN
', $ipversion);
3531 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3532 $vmfw_conf, $vmid, 'OUT
', $ipversion);
3536 warn $@ if $@; # just to be sure - should not happen
3539 if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3540 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3546 sub mac_to_linklocal {
3548 my @parts = split(/:/, $macaddr);
3549 # The standard link local address uses the fe80::/64 prefix with the
3550 # modified EUI-64 identifier derived from the MAC address by flipping the
3551 # universal/local bit and inserting FF:FE in the middle.
3553 $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3554 my @meui64 = (@parts[0,1,2], 'ff
', 'fe
', @parts[3,4,5]);
3555 return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3558 sub compile_ipsets {
3559 my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3562 if ($cluster_conf->{aliases}->{local_network}) {
3563 $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3566 ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3568 $cluster_conf->{aliases}->{local_network} = {
3569 name => 'local_network
', cidr => $localnet, ipversion => $localnet_ver };
3572 push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3575 my $ipset_ruleset = {};
3577 # generate ipsets for QEMU VMs
3578 foreach my $vmid (keys %{$vmdata->{qemu}}) {
3580 my $conf = $vmdata->{qemu}->{$vmid};
3581 my $vmfw_conf = $vmfw_configs->{$vmid};
3582 return if !$vmfw_conf;
3584 # When the 'ipfilter
' option is enabled every device for which there
3585 # is no 'ipfilter-netX
' ipset defiend gets an implicit empty default
3587 # The reason is that ipfilter ipsets are always filled with standard
3588 # IPv6 link-local filters.
3589 my $ipsets = $vmfw_conf->{ipset};
3590 my $implicit_sets = {};
3592 my $device_ips = {};
3593 foreach my $netid (keys %$conf) {
3594 next if $netid !~ m/^net(\d+)$/;
3595 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3596 next if !$net->{firewall};
3598 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3599 $implicit_sets->{"ipfilter-$netid"} = [];
3602 my $macaddr = $net->{macaddr};
3603 my $linklocal = mac_to_linklocal($macaddr);
3604 $device_ips->{$netid} = [
3605 { cidr => $linklocal },
3606 { cidr => 'fe80
::/10', nomatch => 1 }
3610 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3611 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3613 warn $@ if $@; # just to be sure - should not happen
3616 # generate firewall rules for LXC containers
3617 foreach my $vmid (keys %{$vmdata->{lxc}}) {
3619 my $conf = $vmdata->{lxc}->{$vmid};
3620 my $vmfw_conf = $vmfw_configs->{$vmid};
3621 return if !$vmfw_conf;
3623 # When the 'ipfilter
' option is enabled every device for which there
3624 # is no 'ipfilter-netX
' ipset defiend gets an implicit empty default
3626 # The reason is that ipfilter ipsets are always filled with standard
3627 # IPv6 link-local filters, as well as the IP addresses configured
3628 # for the container.
3629 my $ipsets = $vmfw_conf->{ipset};
3630 my $implicit_sets = {};
3632 my $device_ips = {};
3633 foreach my $netid (keys %$conf) {
3634 next if $netid !~ m/^net(\d+)$/;
3635 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3636 next if !$net->{firewall};
3638 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3639 $implicit_sets->{"ipfilter-$netid"} = [];
3642 my $macaddr = $net->{hwaddr};
3643 my $linklocal = mac_to_linklocal($macaddr);
3644 my $set = $device_ips->{$netid} = [
3645 { cidr => $linklocal },
3646 { cidr => 'fe80
::/10', nomatch => 1 }
3648 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3649 push @$set, { cidr => $1 };
3651 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3652 push @$set, { cidr => $1 };
3656 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3657 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3659 warn $@ if $@; # just to be sure - should not happen
3662 generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3664 return $ipset_ruleset;
3667 sub compile_ebtables_filter {
3668 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $verbose) = @_;
3670 if (!($cluster_conf->{options}->{ebtables} // 1)) {
3676 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3678 ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3679 #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED
', to speedup rules
3680 ruleset_addrule($ruleset, 'PVEFW-FORWARD
', '-p IPv4
', '-j ACCEPT
');
3681 ruleset_addrule($ruleset, 'PVEFW-FORWARD
', '-p IPv6
', '-j ACCEPT
');
3682 ruleset_addrule($ruleset, 'PVEFW-FORWARD
', '-o fwln
+', '-j PVEFW-FWBR-OUT
');
3684 # generate firewall rules for QEMU VMs
3685 foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3687 my $conf = $vmdata->{qemu}->{$vmid};
3688 my $vmfw_conf = $vmfw_configs->{$vmid};
3689 return if !$vmfw_conf;
3691 foreach my $netid (sort keys %$conf) {
3692 next if $netid !~ m/^net(\d+)$/;
3693 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3694 next if !$net->{firewall};
3695 my $iface = "tap${vmid}i$1";
3696 my $macaddr = $net->{macaddr};
3698 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid);
3702 warn $@ if $@; # just to be sure - should not happen
3705 # generate firewall rules for LXC containers
3706 foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3708 my $conf = $vmdata->{lxc}->{$vmid};
3710 my $vmfw_conf = $vmfw_configs->{$vmid};
3711 return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3713 foreach my $netid (sort keys %$conf) {
3714 next if $netid !~ m/^net(\d+)$/;
3715 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3716 next if !$net->{firewall};
3717 my $iface = "veth${vmid}i$1";
3718 my $macaddr = $net->{hwaddr};
3719 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid);
3722 warn $@ if $@; # just to be sure - should not happen
3728 sub generate_tap_layer2filter {
3729 my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid) = @_;
3730 my $options = $vmfw_conf->{options};
3732 my $tapchain = $iface."-OUT";
3734 # ebtables remove zeros from mac pairs
3735 $macaddr =~ s/0([0-9a-f])/$1/ig;
3736 $macaddr = lc($macaddr);
3738 ruleset_create_chain($ruleset, $tapchain);
3740 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
3741 ruleset_addrule($ruleset, $tapchain, "-s ! $macaddr", '-j DROP
');
3744 if (defined($options->{layer2_protocols})){
3745 foreach my $proto (split(/,/, $options->{layer2_protocols})) {
3746 ruleset_addrule($ruleset, $tapchain, "-p $proto", '-j ACCEPT
');
3748 ruleset_addrule($ruleset, $tapchain, '', "-j DROP");
3750 ruleset_addrule($ruleset, $tapchain, '', '-j ACCEPT
');
3753 ruleset_addrule($ruleset, 'PVEFW-FWBR-OUT
', "-i $iface", "-j $tapchain");
3756 # the parameter $change_only_regex changes two things if defined:
3757 # * all chains not matching it will be left intact
3758 # * both the $active_chains hash and the returned status_hash have different
3759 # structure (they contain a key named 'rules
').
3760 sub get_ruleset_status {
3761 my ($ruleset, $active_chains, $digest_fn, $verbose, $change_only_regex) = @_;
3763 my $statushash = {};
3765 foreach my $chain (sort keys %$ruleset) {
3766 my $rules = $ruleset->{$chain};
3767 my $sig = &$digest_fn($rules);
3770 $statushash->{$chain}->{sig} = $sig;
3771 if (defined($change_only_regex)) {
3772 $oldsig = $active_chains->{$chain}->{sig};
3773 $statushash->{$chain}->{rules} = $rules;
3775 $oldsig = $active_chains->{$chain};
3777 if (!defined($oldsig)) {
3778 $statushash->{$chain}->{action} = 'create
';
3780 if ($oldsig eq $sig) {
3781 $statushash->{$chain}->{action} = 'exists';
3783 $statushash->{$chain}->{action} = 'update
';
3787 print "$statushash->{$chain}->{action} $chain ($sig)\n";
3788 foreach my $cmd (@{$rules}) {
3794 foreach my $chain (sort keys %$active_chains) {
3795 next if defined($ruleset->{$chain});
3796 my $action = 'delete';
3797 my $sig = $active_chains->{$chain};
3798 if (defined($change_only_regex)) {
3799 $action = 'ignore
' if ($chain !~ m/$change_only_regex/);
3800 $statushash->{$chain}->{rules} = $active_chains->{$chain}->{rules};
3803 $statushash->{$chain}->{action} = $action;
3804 $statushash->{$chain}->{sig} = $sig;
3805 print "$action $chain ($sig)\n" if $verbose;
3811 sub print_sig_rule {
3812 my ($chain, $sig) = @_;
3814 # We just use this to store a SHA1 checksum used to detect changes
3815 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3818 sub get_ruleset_cmdlist {
3819 my ($ruleset, $verbose, $iptablescmd) = @_;
3821 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3823 my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3824 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3826 # create missing chains first
3827 foreach my $chain (sort keys %$ruleset) {
3828 my $stat = $statushash->{$chain};
3829 die "internal error" if !$stat;
3830 next if $stat->{action} ne 'create
';
3832 $cmdlist .= ":$chain - [0:0]\n";
3835 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3836 my $chain = "PVEFW-$h";
3837 if ($ruleset->{$chain} && !$hooks->{$h}) {
3838 $cmdlist .= "-A $h -j $chain\n";
3842 foreach my $chain (sort keys %$ruleset) {
3843 my $stat = $statushash->{$chain};
3844 die "internal error" if !$stat;
3846 if ($stat->{action
} eq 'update' || $stat->{action
} eq 'create') {
3847 $cmdlist .= "-F $chain\n";
3848 foreach my $cmd (@{$ruleset->{$chain}}) {
3849 $cmdlist .= "$cmd\n";
3851 $cmdlist .= print_sig_rule
($chain, $stat->{sig
});
3852 } elsif ($stat->{action
} eq 'delete') {
3853 die "internal error"; # this should not happen
3854 } elsif ($stat->{action
} eq 'exists') {
3857 die "internal error - unknown status '$stat->{action}'";
3861 foreach my $chain (keys %$statushash) {
3862 next if $statushash->{$chain}->{action
} ne 'delete';
3863 $cmdlist .= "-F $chain\n";
3865 foreach my $chain (keys %$statushash) {
3866 next if $statushash->{$chain}->{action
} ne 'delete';
3867 next if $chain eq 'PVEFW-INPUT';
3868 next if $chain eq 'PVEFW-OUTPUT';
3869 next if $chain eq 'PVEFW-FORWARD';
3870 $cmdlist .= "-X $chain\n";
3873 my $changes = $cmdlist ne "*filter\n" ?
1 : 0;
3875 $cmdlist .= "COMMIT\n";
3877 return wantarray ?
($cmdlist, $changes) : $cmdlist;
3880 my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tap|veth)\d+i\d+-(?:IN|OUT)/;
3882 sub get_ebtables_cmdlist
{
3883 my ($ruleset, $verbose) = @_;
3886 my $cmdlist = "*filter\n";
3888 my $active_chains = ebtables_get_chains
();
3889 my $statushash = get_ruleset_status
($ruleset, $active_chains,
3890 \
&iptables_chain_digest
, $verbose,
3891 $pve_ebtables_chainname_regex);
3893 # create chains first and make sure PVE rules are evaluated if active
3894 my $append_pve_to_forward = '-A FORWARD -j PVEFW-FORWARD';
3895 my $pve_include = 0;
3896 foreach my $chain (sort keys %$statushash) {
3897 next if ($statushash->{$chain}->{action
} eq 'delete');
3898 $cmdlist .= ":$chain ACCEPT\n";
3899 $pve_include = 1 if ($chain eq 'PVEFW-FORWARD');
3902 foreach my $chain (sort keys %$statushash) {
3903 my $stat = $statushash->{$chain};
3904 next if ($stat->{action
} eq 'delete');
3905 $changes = 1 if ($stat->{action
} !~ 'ignore|exists');
3907 foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
3908 if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
3909 next if ! $pve_include;
3912 $cmdlist .= "$cmd\n";
3915 $cmdlist .= "$append_pve_to_forward\n" if $pve_include;
3917 return wantarray ?
($cmdlist, $changes) : $cmdlist;
3920 sub get_ipset_cmdlist
{
3921 my ($ruleset, $verbose) = @_;
3925 my $delete_cmdlist = "";
3927 my $active_chains = ipset_get_chains
();
3928 my $statushash = get_ruleset_status
($ruleset, $active_chains, \
&ipset_chain_digest
, $verbose);
3930 # remove stale _swap chains
3931 foreach my $chain (keys %$active_chains) {
3932 if ($chain =~ m/^PVEFW-\S+_swap$/) {
3933 $cmdlist .= "destroy $chain\n";
3937 foreach my $chain (keys %$ruleset) {
3938 my $stat = $statushash->{$chain};
3939 die "internal error" if !$stat;
3941 if ($stat->{action
} eq 'create') {
3942 foreach my $cmd (@{$ruleset->{$chain}}) {
3943 $cmdlist .= "$cmd\n";
3948 foreach my $chain (keys %$ruleset) {
3949 my $stat = $statushash->{$chain};
3950 die "internal error" if !$stat;
3952 if ($stat->{action
} eq 'update') {
3953 my $chain_swap = $chain."_swap";
3955 foreach my $cmd (@{$ruleset->{$chain}}) {
3956 $cmd =~ s/$chain/$chain_swap/;
3957 $cmdlist .= "$cmd\n";
3959 $cmdlist .= "swap $chain_swap $chain\n";
3960 $cmdlist .= "flush $chain_swap\n";
3961 $cmdlist .= "destroy $chain_swap\n";
3965 # the remove unused chains
3966 foreach my $chain (keys %$statushash) {
3967 next if $statushash->{$chain}->{action
} ne 'delete';
3969 $delete_cmdlist .= "flush $chain\n";
3970 $delete_cmdlist .= "destroy $chain\n";
3973 my $changes = ($cmdlist || $delete_cmdlist) ?
1 : 0;
3975 return ($cmdlist, $delete_cmdlist, $changes);
3979 my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset, $verbose) = @_;
3981 enable_bridge_firewall
();
3983 my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3984 get_ipset_cmdlist
($ipset_ruleset, $verbose);
3986 my ($cmdlist, $changes) = get_ruleset_cmdlist
($ruleset, $verbose);
3987 my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist
($rulesetv6, $verbose, "ip6tables");
3988 my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist
($ebtables_ruleset, $verbose);
3991 if ($ipset_changes) {
3992 print "ipset changes:\n";
3993 print $ipset_create_cmdlist if $ipset_create_cmdlist;
3994 print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3998 print "iptables changes:\n";
4003 print "ip6tables changes:\n";
4007 if ($ebtables_changes) {
4008 print "ebtables changes:\n";
4009 print $ebtables_cmdlist;
4013 my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
4014 PVE
::Tools
::file_set_contents
($tmpfile, $ipset_create_cmdlist || '');
4016 ipset_restore_cmdlist
($ipset_create_cmdlist);
4018 $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
4019 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlist || '');
4021 iptables_restore_cmdlist
($cmdlist);
4023 $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
4024 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlistv6 || '');
4026 ip6tables_restore_cmdlist
($cmdlistv6);
4028 $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
4029 PVE
::Tools
::file_set_contents
($tmpfile, $ipset_delete_cmdlist || '');
4031 ipset_restore_cmdlist
($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
4033 ebtables_restore_cmdlist
($ebtables_cmdlist);
4035 $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
4036 PVE
::Tools
::file_set_contents
($tmpfile, $ebtables_cmdlist || '');
4038 # test: re-read status and check if everything is up to date
4039 my $active_chains = iptables_get_chains
();
4040 my $statushash = get_ruleset_status
($ruleset, $active_chains, \
&iptables_chain_digest
, 0);
4043 foreach my $chain (sort keys %$ruleset) {
4044 my $stat = $statushash->{$chain};
4045 if ($stat->{action
} ne 'exists') {
4046 warn "unable to update chain '$chain'\n";
4051 my $active_chainsv6 = iptables_get_chains
("ip6tables");
4052 my $statushashv6 = get_ruleset_status
($rulesetv6, $active_chainsv6, \
&iptables_chain_digest
, 0);
4054 foreach my $chain (sort keys %$rulesetv6) {
4055 my $stat = $statushashv6->{$chain};
4056 if ($stat->{action
} ne 'exists') {
4057 warn "unable to update chain '$chain'\n";
4062 my $active_ebtables_chains = ebtables_get_chains
();
4063 my $ebtables_statushash = get_ruleset_status
($ebtables_ruleset,
4064 $active_ebtables_chains, \
&iptables_chain_digest
,
4065 0, $pve_ebtables_chainname_regex);
4067 foreach my $chain (sort keys %$ebtables_ruleset) {
4068 my $stat = $ebtables_statushash->{$chain};
4069 if ($stat->{action
} ne 'exists') {
4070 warn "ebtables : unable to update chain '$chain'\n";
4075 die "unable to apply firewall changes\n" if $errors;
4077 update_nf_conntrack_max
($hostfw_conf);
4079 update_nf_conntrack_tcp_timeout_established
($hostfw_conf);
4081 update_nf_conntrack_logging
($hostfw_conf);
4084 sub update_nf_conntrack_max
{
4085 my ($hostfw_conf) = @_;
4087 my $max = 65536; # reasonable default
4089 my $options = $hostfw_conf->{options
} || {};
4091 if (defined($options->{nf_conntrack_max
}) && ($options->{nf_conntrack_max
} > $max)) {
4092 $max = $options->{nf_conntrack_max
};
4093 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
4096 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
4097 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
4099 my $current = int(PVE
::Tools
::file_read_firstline
($filename_nf_conntrack_max) || $max);
4101 if ($current != $max) {
4102 my $hashsize = int($max/4);
4103 PVE
::ProcFSTools
::write_proc_entry
($filename_hashsize, $hashsize);
4104 PVE
::ProcFSTools
::write_proc_entry
($filename_nf_conntrack_max, $max);
4108 sub update_nf_conntrack_tcp_timeout_established
{
4109 my ($hostfw_conf) = @_;
4111 my $options = $hostfw_conf->{options
} || {};
4113 my $value = defined($options->{nf_conntrack_tcp_timeout_established
}) ?
$options->{nf_conntrack_tcp_timeout_established
} : 432000;
4115 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
4118 my $log_nf_conntrack_enabled = undef;
4119 sub update_nf_conntrack_logging
{
4120 my ($hostfw_conf) = @_;
4122 my $options = $hostfw_conf->{options
} || {};
4123 my $value = $options->{log_nf_conntrack
} || 0;
4124 if (!defined($log_nf_conntrack_enabled)
4125 || $value != $log_nf_conntrack_enabled)
4127 my $tmpfile = "$pve_fw_status_dir/log_nf_conntrack";
4128 PVE
::Tools
::file_set_contents
($tmpfile, $value);
4130 PVE
::Tools
::run_command
([qw(systemctl try-reload-or-restart pvefw-logger.service)]);
4131 $log_nf_conntrack_enabled = $value;
4135 sub remove_pvefw_chains
{
4137 PVE
::Firewall
::remove_pvefw_chains_iptables
("iptables");
4138 PVE
::Firewall
::remove_pvefw_chains_iptables
("ip6tables");
4139 PVE
::Firewall
::remove_pvefw_chains_ipset
();
4143 sub remove_pvefw_chains_iptables
{
4144 my ($iptablescmd) = @_;
4146 my ($chash, $hooks) = iptables_get_chains
($iptablescmd);
4147 my $cmdlist = "*filter\n";
4149 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
4151 $cmdlist .= "-D $h -j PVEFW-$h\n";
4155 foreach my $chain (keys %$chash) {
4156 $cmdlist .= "-F $chain\n";
4159 foreach my $chain (keys %$chash) {
4160 $cmdlist .= "-X $chain\n";
4162 $cmdlist .= "COMMIT\n";
4164 if($iptablescmd eq "ip6tables") {
4165 ip6tables_restore_cmdlist
($cmdlist);
4167 iptables_restore_cmdlist
($cmdlist);
4171 sub remove_pvefw_chains_ipset
{
4173 my $ipset_chains = ipset_get_chains
();
4177 foreach my $chain (keys %$ipset_chains) {
4178 $cmdlist .= "flush $chain\n";
4179 $cmdlist .= "destroy $chain\n";
4182 ipset_restore_cmdlist
($cmdlist) if $cmdlist;
4186 my $cluster_conf = load_clusterfw_conf
();
4187 my $cluster_options = $cluster_conf->{options
};
4188 my $enable = $cluster_options->{enable
};
4192 # load required modules here
4198 my $cluster_conf = load_clusterfw_conf
();
4199 my $cluster_options = $cluster_conf->{options
};
4201 if (!$cluster_options->{enable
}) {
4202 PVE
::Firewall
::remove_pvefw_chains
();
4206 my $hostfw_conf = load_hostfw_conf
($cluster_conf);
4208 my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile
($cluster_conf, $hostfw_conf);
4210 apply_ruleset
($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);