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).*$!) {
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;
881 sub get_etc_protocols
{
882 return $etc_protocols if $etc_protocols;
884 my $filename = "/etc/protocols";
886 my $fh = IO
::File-
>new($filename, O_RDONLY
);
888 warn "unable to read '$filename' - $!\n";
894 while (my $line = <$fh>) {
896 next if $line =~m/^#/;
897 next if ($line =~m/^\s*$/);
899 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
900 $protocols->{byid
}->{$2}->{name
} = $1;
901 $protocols->{byname
}->{$1} = $protocols->{byid
}->{$2};
907 # add special case for ICMP v6
908 $protocols->{byid
}->{icmpv6
}->{name
} = "icmpv6";
909 $protocols->{byname
}->{icmpv6
} = $protocols->{byid
}->{icmpv6
};
911 $etc_protocols = $protocols;
913 return $etc_protocols;
919 my ($new_value) = @_;
921 $__local_network = $new_value if defined($new_value);
923 return $__local_network if defined($__local_network);
926 my $nodename = PVE
::INotify
::nodename
();
928 my $ip = PVE
::Cluster
::remote_node_ip
($nodename);
930 my $testip = Net
::IP-
>new($ip);
932 my $isv6 = $testip->version == 6;
933 my $routes = $isv6 ? PVE
::ProcFSTools
::read_proc_net_ipv6_route
()
934 : PVE
::ProcFSTools
::read_proc_net_route
();
935 foreach my $entry (@$routes) {
938 $mask = $entry->{prefix
};
939 next if !$mask; # skip the default route...
941 $mask = $PVE::Network
::ipv4_mask_hash_localnet-
>{$entry->{mask
}};
942 next if !defined($mask);
944 my $cidr = "$entry->{dest}/$mask";
945 my $testnet = Net
::IP-
>new($cidr);
946 my $overlap = $testnet->overlaps($testip);
947 if ($overlap == $Net::IP
::IP_B_IN_A_OVERLAP
||
948 $overlap == $Net::IP
::IP_IDENTICAL
)
950 $__local_network = $cidr;
957 return $__local_network;
960 # ipset names are limited to 31 characters,
961 # and we use '-v4' or '-v6' to indicate IP versions,
962 # and we use '_swap' suffix for atomic update,
963 # for example PVEFW-${VMID}-${ipset_name}_swap
965 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
967 sub compute_ipset_chain_name
{
968 my ($vmid, $ipset_name, $ipversion) = @_;
970 $vmid = 0 if !defined($vmid);
972 my $id = "$vmid-${ipset_name}-v$ipversion";
974 if (length($id) > $max_iptables_ipset_name_length) {
975 $id = PVE
::Tools
::fnv31a_hex
($id);
981 sub compute_ipfilter_ipset_name
{
984 return "ipfilter-$iface";
987 sub parse_address_list
{
990 if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
991 die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
995 if ($str =~ m/^${ip_alias_pattern}$/) {
996 die "alias name too long\n" if length($str) > $max_alias_name_length;
1004 my @elements = split(/,/, $str);
1005 die "extraneous commas in list\n" if $str ne join(',', @elements);
1006 foreach my $elem (@elements) {
1008 my $ip = Net
::IP-
>new($elem);
1010 my $err = Net
::IP
::Error
();
1011 die "invalid IP address: $err\n";
1013 $iprange = 1 if $elem =~ m/-/;
1015 my $new_ipversion = Net
::IP
::ip_is_ipv6
($ip->ip()) ?
6 : 4;
1017 die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
1018 if $ipversion && ($new_ipversion != $ipversion);
1020 $ipversion = $new_ipversion;
1023 die "you can't use a range in a list\n" if $iprange && $count > 1;
1028 sub parse_port_name_number_or_range
{
1029 my ($str, $dport) = @_;
1031 my $services = PVE
::Firewall
::get_etc_services
();
1035 my @elements = split(/,/, $str);
1036 die "extraneous commas in list\n" if $str ne join(',', @elements);
1037 foreach my $item (@elements) {
1039 if ($item =~ m/^(\d+):(\d+)$/) {
1040 my ($port1, $port2) = ($1, $2);
1041 die "invalid port '$port1'\n" if $port1 > 65535;
1042 die "invalid port '$port2'\n" if $port2 > 65535;
1043 } elsif ($item =~ m/^(\d+)$/) {
1045 die "invalid port '$port'\n" if $port > 65535;
1047 if ($dport && $icmp_type_names->{$item}) {
1049 } elsif ($dport && $icmpv6_type_names->{$item}) {
1052 die "invalid port '$item'\n" if !$services->{byname
}->{$item};
1057 die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
1062 PVE
::JSONSchema
::register_format
('pve-fw-sport-spec', \
&pve_fw_verify_sport_spec
);
1063 sub pve_fw_verify_sport_spec
{
1066 parse_port_name_number_or_range
($portstr, 0);
1071 PVE
::JSONSchema
::register_format
('pve-fw-dport-spec', \
&pve_fw_verify_dport_spec
);
1072 sub pve_fw_verify_dport_spec
{
1075 parse_port_name_number_or_range
($portstr, 1);
1080 PVE
::JSONSchema
::register_format
('pve-fw-addr-spec', \
&pve_fw_verify_addr_spec
);
1081 sub pve_fw_verify_addr_spec
{
1084 parse_address_list
($list);
1089 PVE
::JSONSchema
::register_format
('pve-fw-protocol-spec', \
&pve_fw_verify_protocol_spec
);
1090 sub pve_fw_verify_protocol_spec
{
1093 my $protocols = get_etc_protocols
();
1095 die "unknown protocol '$proto'\n" if $proto &&
1096 !(defined($protocols->{byname
}->{$proto}) ||
1097 defined($protocols->{byid
}->{$proto}));
1103 # helper function for API
1105 sub copy_opject_with_digest
{
1108 my $sha = Digest
::SHA-
>new('sha1');
1111 foreach my $k (sort keys %$object) {
1112 my $v = $object->{$k};
1113 next if !defined($v);
1115 $sha->add($k, ':', $v, "\n");
1118 my $digest = $sha->hexdigest;
1120 $res->{digest
} = $digest;
1122 return wantarray ?
($res, $digest) : $res;
1125 sub copy_list_with_digest
{
1128 my $sha = Digest
::SHA-
>new('sha1');
1131 foreach my $entry (@$list) {
1133 foreach my $k (sort keys %$entry) {
1134 my $v = $entry->{$k};
1135 next if !defined($v);
1137 # Note: digest ignores refs ($rule->{errors})
1138 # since Digest::SHA expects a series of bytes,
1139 # we have to encode the value here to prevent errors when
1140 # using utf8 characters (eg. in comments)
1141 $sha->add($k, ':', encode_utf8
($v), "\n") if !ref($v); ;
1146 my $digest = $sha->hexdigest;
1148 foreach my $entry (@$res) {
1149 $entry->{digest
} = $digest;
1152 return wantarray ?
($res, $digest) : $res;
1155 our $cluster_option_properties = {
1157 description
=> "Enable or disable the firewall cluster wide.",
1163 description
=> "Input policy.",
1166 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1169 description
=> "Output policy.",
1172 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1176 our $host_option_properties = {
1178 description
=> "Enable host firewall rules.",
1182 log_level_in
=> get_standard_option
('pve-fw-loglevel', {
1183 description
=> "Log level for incoming traffic." }),
1184 log_level_out
=> get_standard_option
('pve-fw-loglevel', {
1185 description
=> "Log level for outgoing traffic." }),
1186 tcp_flags_log_level
=> get_standard_option
('pve-fw-loglevel', {
1187 description
=> "Log level for illegal tcp flags filter." }),
1188 smurf_log_level
=> get_standard_option
('pve-fw-loglevel', {
1189 description
=> "Log level for SMURFS filter." }),
1191 description
=> "Enable SMURFS filter.",
1196 description
=> "Filter illegal combinations of TCP flags.",
1200 nf_conntrack_max
=> {
1201 description
=> "Maximum number of tracked connections.",
1206 nf_conntrack_tcp_timeout_established
=> {
1207 description
=> "Conntrack established timeout.",
1213 description
=> "Enable NDP.",
1219 our $vm_option_properties = {
1221 description
=> "Enable/disable firewall rules.",
1226 description
=> "Enable/disable MAC address filter.",
1231 description
=> "Enable DHCP.",
1236 description
=> "Enable NDP.",
1241 description
=> "Allow sending Router Advertisement.",
1246 description
=> "Enable default IP filters. " .
1247 "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1248 "for every interface. Such ipsets implicitly contain sane default " .
1249 "restrictions such as restricting IPv6 link local addresses to " .
1250 "the one derived from the interface's MAC address. For containers " .
1251 "the configured IP addresses will be implicitly added.",
1256 description
=> "Input policy.",
1259 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1262 description
=> "Output policy.",
1265 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1267 log_level_in
=> get_standard_option
('pve-fw-loglevel', {
1268 description
=> "Log level for incoming traffic." }),
1269 log_level_out
=> get_standard_option
('pve-fw-loglevel', {
1270 description
=> "Log level for outgoing traffic." }),
1275 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.";
1277 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.";
1279 my $rule_properties = {
1281 description
=> "Update rule at position <pos>.",
1286 digest
=> get_standard_option
('pve-config-digest'),
1288 description
=> "Rule type.",
1291 enum
=> ['in', 'out', 'group'],
1294 description
=> "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1297 pattern
=> $security_group_name_pattern,
1302 description
=> "Use predefined standard macro.",
1307 iface
=> get_standard_option
('pve-iface', {
1308 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.",
1312 description
=> "Restrict packet source address. $addr_list_descr",
1313 type
=> 'string', format
=> 'pve-fw-addr-spec',
1317 description
=> "Restrict packet destination address. $addr_list_descr",
1318 type
=> 'string', format
=> 'pve-fw-addr-spec',
1322 description
=> "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1323 type
=> 'string', format
=> 'pve-fw-protocol-spec',
1327 description
=> "Flag to enable/disable a rule.",
1333 description
=> "Restrict TCP/UDP source port. $port_descr",
1334 type
=> 'string', format
=> 'pve-fw-sport-spec',
1338 description
=> "Restrict TCP/UDP destination port. $port_descr",
1339 type
=> 'string', format
=> 'pve-fw-dport-spec',
1343 description
=> "Descriptive comment.",
1349 sub add_rule_properties
{
1350 my ($properties) = @_;
1352 foreach my $k (keys %$rule_properties) {
1353 my $h = $rule_properties->{$k};
1354 # copy data, so that we can modify later without side effects
1355 foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1361 sub delete_rule_properties
{
1362 my ($rule, $delete_str) = @_;
1364 foreach my $opt (PVE
::Tools
::split_list
($delete_str)) {
1365 raise_param_exc
({ 'delete' => "no such property ('$opt')"})
1366 if !defined($rule_properties->{$opt});
1367 raise_param_exc
({ 'delete' => "unable to delete required property '$opt'"})
1368 if $opt eq 'type' || $opt eq 'action';
1369 delete $rule->{$opt};
1375 my $apply_macro = sub {
1376 my ($macro_name, $param, $verify, $ipversion) = @_;
1378 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1379 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1381 if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1382 $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1385 # skip macros which are specific to another ipversion
1386 if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1387 return if $ipversion != $required;
1392 foreach my $templ (@$macro_rules) {
1394 my $param_used = {};
1395 foreach my $k (keys %$templ) {
1396 my $v = $templ->{$k};
1397 if ($v eq 'PARAM') {
1399 $param_used->{$k} = 1;
1400 } elsif ($v eq 'DEST') {
1401 $v = $param->{dest
};
1402 $param_used->{dest
} = 1;
1403 } elsif ($v eq 'SOURCE') {
1404 $v = $param->{source
};
1405 $param_used->{source
} = 1;
1409 my $msg = "missing parameter '$k' in macro '$macro_name'";
1410 raise_param_exc
({ macro => $msg }) if $verify;
1415 foreach my $k (keys %$param) {
1416 next if $k eq 'macro';
1417 next if !defined($param->{$k});
1418 next if $param_used->{$k};
1419 if (defined($rule->{$k})) {
1420 if ($rule->{$k} ne $param->{$k}) {
1421 my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1422 raise_param_exc
({ $k => $msg }) if $verify;
1426 $rule->{$k} = $param->{$k};
1429 push @$rules, $rule;
1435 my $rule_env_iface_lookup = {
1444 my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1446 my $allow_groups = $rule_env eq 'group' ?
0 : 1;
1448 my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1449 die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1451 my $errors = $rule->{errors
} || {};
1453 my $error_count = 0;
1455 my $add_error = sub {
1456 my ($param, $msg) = @_;
1458 raise_param_exc
({ $param => $msg }) if !$noerr;
1460 $errors->{$param} = $msg if !$errors->{$param};
1464 my $set_ip_version = sub {
1467 die "detected mixed ipv4/ipv6 adresses in rule\n"
1468 if $ipversion && ($vers != $ipversion);
1473 my $check_ipset_or_alias_property = sub {
1474 my ($name, $expected_ipversion) = @_;
1476 if (my $value = $rule->{$name}) {
1477 if ($value =~ m/^\+/) {
1478 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1479 &$add_error($name, "no such ipset '$1'")
1480 if !($cluster_conf->{ipset
}->{$1} || ($fw_conf && $fw_conf->{ipset
}->{$1}));
1483 &$add_error($name, "invalid ipset name '$value'");
1485 } elsif ($value =~ m/^${ip_alias_pattern}$/){
1486 my $alias = lc($value);
1487 &$add_error($name, "no such alias '$value'")
1488 if !($cluster_conf->{aliases
}->{$alias} || ($fw_conf && $fw_conf->{aliases
}->{$alias}));
1489 my $e = $fw_conf ?
$fw_conf->{aliases
}->{$alias} : undef;
1490 $e = $cluster_conf->{aliases
}->{$alias} if !$e && $cluster_conf;
1492 &$set_ip_version($e->{ipversion
});
1497 my $type = $rule->{type
};
1498 my $action = $rule->{action
};
1500 &$add_error('type', "missing property") if !$type;
1501 &$add_error('action', "missing property") if !$action;
1504 if ($type eq 'in' || $type eq 'out') {
1505 &$add_error('action', "unknown action '$action'")
1506 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1507 } elsif ($type eq 'group') {
1508 &$add_error('type', "security groups not allowed")
1510 &$add_error('action', "invalid characters in security group name")
1511 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1513 &$add_error('type', "unknown rule type '$type'");
1517 if ($rule->{iface
}) {
1518 &$add_error('type', "parameter -i not allowed for this rule type")
1520 eval { PVE
::JSONSchema
::pve_verify_iface
($rule->{iface
}); };
1521 &$add_error('iface', $@) if $@;
1522 if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1523 &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1524 if $rule->{iface
} !~ m/^net(\d+)$/;
1528 if ($rule->{macro}) {
1529 if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1530 $rule->{macro} = $preferred_name;
1532 &$add_error('macro', "unknown macro '$rule->{macro}'");
1536 if ($rule->{proto
}) {
1537 eval { pve_fw_verify_protocol_spec
($rule->{proto
}); };
1538 &$add_error('proto', $@) if $@;
1539 &$set_ip_version(4) if $rule->{proto
} eq 'icmp';
1540 &$set_ip_version(6) if $rule->{proto
} eq 'icmpv6';
1543 if ($rule->{dport
}) {
1544 eval { parse_port_name_number_or_range
($rule->{dport
}, 1); };
1545 &$add_error('dport', $@) if $@;
1546 my $proto = $rule->{proto
};
1547 &$add_error('proto', "missing property - 'dport' requires this property")
1549 &$add_error('dport', "protocol '$proto' does not support ports")
1550 if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1551 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1554 if ($rule->{sport
}) {
1555 eval { parse_port_name_number_or_range
($rule->{sport
}, 0); };
1556 &$add_error('sport', $@) if $@;
1557 my $proto = $rule->{proto
};
1558 &$add_error('proto', "missing property - 'sport' requires this property")
1560 &$add_error('sport', "protocol '$proto' does not support ports")
1561 if !$PROTOCOLS_WITH_PORTS->{$proto};
1564 if ($rule->{source
}) {
1566 my $source_ipversion = parse_address_list
($rule->{source
});
1567 &$set_ip_version($source_ipversion);
1569 &$add_error('source', $@) if $@;
1570 &$check_ipset_or_alias_property('source', $ipversion);
1573 if ($rule->{dest
}) {
1575 my $dest_ipversion = parse_address_list
($rule->{dest
});
1576 &$set_ip_version($dest_ipversion);
1578 &$add_error('dest', $@) if $@;
1579 &$check_ipset_or_alias_property('dest', $ipversion);
1582 $rule->{ipversion
} = $ipversion if $ipversion;
1584 if ($rule->{macro} && !$error_count) {
1585 eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1587 if (ref($err) eq "PVE::Exception" && $err->{errors
}) {
1588 my $eh = $err->{errors
};
1589 foreach my $p (keys %$eh) {
1590 &$add_error($p, $eh->{$p});
1593 &$add_error('macro', "$err");
1598 $rule->{errors
} = $errors if $error_count;
1603 sub copy_rule_data
{
1604 my ($rule, $param) = @_;
1606 foreach my $k (keys %$rule_properties) {
1607 if (defined(my $v = $param->{$k})) {
1608 if ($v eq '' || $v eq '-') {
1619 sub rules_modify_permissions
{
1620 my ($rule_env) = @_;
1622 if ($rule_env eq 'host') {
1624 check
=> ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1626 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1628 check
=> ['perm', '/', [ 'Sys.Modify' ]],
1630 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1632 check
=> ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1639 sub rules_audit_permissions
{
1640 my ($rule_env) = @_;
1642 if ($rule_env eq 'host') {
1644 check
=> ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1646 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1648 check
=> ['perm', '/', [ 'Sys.Audit' ]],
1650 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1652 check
=> ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1660 my $bridge_firewall_enabled = 0;
1662 sub enable_bridge_firewall
{
1664 return if $bridge_firewall_enabled; # only once
1666 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1667 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1669 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1670 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/ipv4/tcp_syncookies", "1");
1672 $bridge_firewall_enabled = 1;
1675 sub iptables_restore_cmdlist
{
1678 run_command
("/sbin/iptables-restore -n", input
=> $cmdlist, errmsg
=> "iptables_restore_cmdlist");
1681 sub ip6tables_restore_cmdlist
{
1684 run_command
("/sbin/ip6tables-restore -n", input
=> $cmdlist, errmsg
=> "iptables_restore_cmdlist");
1687 sub ipset_restore_cmdlist
{
1690 run_command
("/sbin/ipset restore", input
=> $cmdlist, errmsg
=> "ipset_restore_cmdlist");
1693 sub iptables_get_chains
{
1694 my ($iptablescmd) = @_;
1696 $iptablescmd = "iptables" if !$iptablescmd;
1700 # check what chains we want to track
1701 my $is_pvefw_chain = sub {
1704 return 1 if $name =~ m/^PVEFW-\S+$/;
1706 return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1708 return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1710 return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1711 return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1723 return if $line =~ m/^#/;
1724 return if $line =~ m/^\s*$/;
1726 if ($line =~ m/^\*(\S+)$/) {
1731 return if $table ne 'filter';
1733 if ($line =~ m/^:(\S+)\s/) {
1735 return if !&$is_pvefw_chain($chain);
1736 $res->{$chain} = "unknown";
1737 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1738 my ($chain, $sig) = ($1, $2);
1739 return if !&$is_pvefw_chain($chain);
1740 $res->{$chain} = $sig;
1741 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1744 # simply ignore the rest
1749 run_command
("/sbin/$iptablescmd-save", outfunc
=> $parser);
1751 return wantarray ?
($res, $hooks) : $res;
1754 sub iptables_chain_digest
{
1756 my $digest = Digest
::SHA-
>new('sha1');
1757 foreach my $rule (@$rules) { # order is important
1758 $digest->add($rule);
1760 return $digest->b64digest;
1763 sub ipset_chain_digest
{
1766 my $digest = Digest
::SHA-
>new('sha1');
1767 foreach my $rule (sort @$rules) { # note: sorted
1768 $digest->add($rule);
1770 return $digest->b64digest;
1773 sub ipset_get_chains
{
1781 return if $line =~ m/^#/;
1782 return if $line =~ m/^\s*$/;
1783 if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1785 $line =~ s/\s+$//; # delete trailing white space
1786 push @{$chains->{$chain}}, $line;
1788 # simply ignore the rest
1793 run_command
("/sbin/ipset save", outfunc
=> $parser);
1795 # compute digest for each chain
1796 foreach my $chain (keys %$chains) {
1797 $res->{$chain} = ipset_chain_digest
($chains->{$chain});
1803 # substitude action of rule according to action hash
1804 sub rule_substitude_action
{
1805 my ($rule, $actions) = @_;
1807 if (my $action = $rule->{action
}) {
1808 $rule->{action
} = $actions->{$action} if defined($actions->{$action});
1812 # generate a src or dst match
1813 # $dir(ection) is either d or s
1814 sub ipt_gen_src_or_dst_match
{
1815 my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
1820 } elsif ($dir eq 'd') {
1823 die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
1827 if ($adr =~ m/^\+/) {
1828 if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
1831 if ($fw_conf && $fw_conf->{ipset
}->{$name}) {
1832 $ipset_chain = compute_ipset_chain_name
($fw_conf->{vmid
}, $name, $ipversion);
1833 } elsif ($cluster_conf && $cluster_conf->{ipset
}->{$name}) {
1834 $ipset_chain = compute_ipset_chain_name
(0, $name, $ipversion);
1836 die "no such ipset '$name'\n";
1838 $match = "-m set --match-set ${ipset_chain} ${srcdst}";
1840 die "invalid security group name '$adr'\n";
1842 } elsif ($adr =~ m/^${ip_alias_pattern}$/){
1843 my $alias = lc($adr);
1844 my $e = $fw_conf ?
$fw_conf->{aliases
}->{$alias} : undef;
1845 $e = $cluster_conf->{aliases
}->{$alias} if !$e && $cluster_conf;
1846 die "no such alias '$adr'\n" if !$e;
1847 $match = "-${dir} $e->{cidr}";
1848 } elsif ($adr =~ m/\-/){
1849 $match = "-m iprange --${srcdst}-range $adr";
1851 $match = "-${dir} $adr";
1857 # convert a %rule to an array of iptables commands
1858 sub ipt_rule_to_cmds
{
1859 my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
1861 die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
1865 if (defined $rule->{match
}) {
1866 push @match, $rule->{match
};
1868 push @match, "-i $rule->{iface_in}" if $rule->{iface_in
};
1869 push @match, "-o $rule->{iface_out}" if $rule->{iface_out
};
1871 if ($rule->{source
}) {
1872 push @match, ipt_gen_src_or_dst_match
($rule->{source
}, 's', $ipversion, $cluster_conf, $fw_conf);
1874 if ($rule->{dest
}) {
1875 push @match, ipt_gen_src_or_dst_match
($rule->{dest
}, 'd', $ipversion, $cluster_conf, $fw_conf);
1878 if (my $proto = $rule->{proto
}) {
1879 push @match, "-p $proto";
1881 my $nbdport = defined($rule->{dport
}) ? parse_port_name_number_or_range
($rule->{dport
}, 1) : 0;
1882 my $nbsport = defined($rule->{sport
}) ? parse_port_name_number_or_range
($rule->{sport
}, 0) : 0;
1885 $multiport++ if $nbdport > 1;
1886 $multiport++ if $nbsport > 1;
1888 push @match, "--match multiport" if $multiport;
1890 die "multiport: option '--sports' cannot be used together with '--dports'\n"
1891 if ($multiport == 2) && ($rule->{dport
} ne $rule->{sport
});
1893 if ($rule->{dport
}) {
1894 if ($proto eq 'icmp') {
1895 # Note: we use dport to store --icmp-type
1896 die "unknown icmp-type '$rule->{dport}'\n"
1897 if $rule->{dport
} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport
}});
1898 push @match, "-m icmp --icmp-type $rule->{dport}";
1899 } elsif ($proto eq 'icmpv6') {
1900 # Note: we use dport to store --icmpv6-type
1901 die "unknown icmpv6-type '$rule->{dport}'\n"
1902 if $rule->{dport
} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport
}});
1903 push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
1904 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
1905 die "protocol $proto does not have ports\n";
1908 if ($multiport == 2) {
1909 push @match, "--ports $rule->{dport}";
1911 push @match, "--dports $rule->{dport}";
1914 push @match, "--dport $rule->{dport}";
1919 if ($rule->{sport
}) {
1920 die "protocol $proto does not have ports\n"
1921 if !$PROTOCOLS_WITH_PORTS->{$proto};
1923 push @match, "--sports $rule->{sport}" if $multiport != 2;
1925 push @match, "--sport $rule->{sport}";
1928 } elsif ($rule->{dport
} || $rule->{sport
}) {
1929 die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport
};
1930 die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport
};
1933 push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype
};
1935 my $matchstr = scalar(@match) ?
join(' ', @match) : "";
1938 if (defined $rule->{target
}) {
1939 $targetstr = $rule->{target
};
1941 my $action = (defined $rule->{action
}) ?
$rule->{action
} : "";
1942 my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
1943 $targetstr = ($goto) ?
"-g $action" : "-j $action";
1947 if (defined $rule->{log} && $rule->{log}) {
1948 my $logaction = get_log_rule_base
($chain, $vmid, $rule->{logmsg
}, $rule->{log});
1949 push @iptcmds, "-A $chain $matchstr $logaction";
1951 push @iptcmds, "-A $chain $matchstr $targetstr";
1955 sub ruleset_generate_rule
{
1956 my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf) = @_;
1960 if ($rule->{macro}) {
1961 $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
1966 # update all or nothing
1968 foreach my $r (@$rules) {
1969 push @ipt_rule_cmds, ipt_rule_to_cmds
($r, $chain, $ipversion, $cluster_conf, $fw_conf);
1971 foreach my $c (@ipt_rule_cmds) {
1972 ruleset_add_ipt_cmd
($ruleset, $chain, $c);
1976 sub ruleset_create_chain
{
1977 my ($ruleset, $chain) = @_;
1979 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1980 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1982 die "chain '$chain' already exists\n" if $ruleset->{$chain};
1984 $ruleset->{$chain} = [];
1987 sub ruleset_chain_exist
{
1988 my ($ruleset, $chain) = @_;
1990 return $ruleset->{$chain} ?
1 : undef;
1993 # add an iptables command (like generated by ipt_rule_to_cmds) to a chain
1994 sub ruleset_add_ipt_cmd
{
1995 my ($ruleset, $chain, $iptcmd) = @_;
1997 die "no such chain '$chain'\n" if !$ruleset->{$chain};
1999 push @{$ruleset->{$chain}}, $iptcmd;
2002 sub ruleset_addrule
{
2003 my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
2005 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2007 if (defined($log) && $log) {
2008 my $logaction = get_log_rule_base
($chain, $vmid, $logmsg, $log);
2009 push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
2011 push @{$ruleset->{$chain}}, "-A $chain $match $action";
2014 sub ruleset_insertrule
{
2015 my ($ruleset, $chain, $match, $action, $log) = @_;
2017 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2019 unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2022 sub get_log_rule_base
{
2023 my ($chain, $vmid, $msg, $loglevel) = @_;
2025 $vmid = 0 if !defined($vmid);
2026 $msg = "" if !defined($msg);
2028 # Note: we use special format for prefix to pass further
2029 # info to log daemon (VMID, LOGLEVEL and CHAIN)
2031 return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2034 sub ruleset_add_chain_policy {
2035 my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2037 if ($policy eq 'ACCEPT') {
2039 my $rule = { action => 'ACCEPT' };
2040 rule_substitude_action($rule, { ACCEPT => $accept_action});
2041 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2043 } elsif ($policy eq 'DROP') {
2045 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop
");
2047 ruleset_addrule($ruleset, $chain, "", "-j DROP
", $loglevel, "policy
$policy: ", $vmid);
2048 } elsif ($policy eq 'REJECT') {
2049 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject
");
2051 ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject
", $loglevel, "policy
$policy:", $vmid);
2054 die "internal error
: unknown policy
'$policy'";
2058 sub ruleset_chain_add_ndp {
2059 my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2060 return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2062 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-solicitation
", $accept);
2063 if ($direction ne 'OUT' || $options->{radv}) {
2064 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-advertisement
", $accept);
2066 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type neighbor-solicitation
", $accept);
2067 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type neighbor-advertisement
", $accept);
2070 sub ruleset_chain_add_conn_filters {
2071 my ($ruleset, $chain, $accept) = @_;
2073 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
", "-j DROP
");
2074 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
", "-j
$accept");
2077 sub ruleset_chain_add_input_filters {
2078 my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2080 if ($cluster_conf->{ipset}->{blacklist}){
2081 if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist
")) {
2082 ruleset_create_chain($ruleset, "PVEFW-blacklist
");
2083 ruleset_addrule($ruleset, "PVEFW-blacklist
", "", "-j DROP
", $loglevel, "DROP
: ");
2085 my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2086 ruleset_addrule($ruleset, $chain, "-m set
--match-set
${ipset_chain
} src
", "-j PVEFW-blacklist
");
2089 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2090 if ($ipversion == 4) {
2091 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
,NEW
", "-j PVEFW-smurfs
");
2095 if ($options->{tcpflags}) {
2096 ruleset_addrule($ruleset, $chain, "-p tcp
", "-j PVEFW-tcpflags
");
2100 sub ruleset_create_vm_chain {
2101 my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2103 ruleset_create_chain($ruleset, $chain);
2104 my $accept = generate_nfqueue($options);
2106 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2107 if ($ipversion == 4) {
2108 if ($direction eq 'OUT') {
2109 ruleset_generate_rule($ruleset, $chain, $ipversion,
2110 { action => 'PVEFW-SET-ACCEPT-MARK',
2111 proto => 'udp', sport => 68, dport => 67 });
2113 ruleset_generate_rule($ruleset, $chain, $ipversion,
2114 { action => 'ACCEPT',
2115 proto => 'udp', sport => 67, dport => 68 });
2117 } elsif ($ipversion == 6) {
2118 if ($direction eq 'OUT') {
2119 ruleset_generate_rule($ruleset, $chain, $ipversion,
2120 { action => 'PVEFW-SET-ACCEPT-MARK',
2121 proto => 'udp', sport => 546, dport => 547 });
2123 ruleset_generate_rule($ruleset, $chain, $ipversion,
2124 { action => 'ACCEPT',
2125 proto => 'udp', sport => 547, dport => 546 });
2131 if ($direction eq 'OUT') {
2132 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2133 ruleset_addrule($ruleset, $chain, "-m mac
! --mac-source
$macaddr", "-j DROP
");
2135 if ($ipversion == 6 && !$options->{radv}) {
2136 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-advertisement
", "-j DROP
");
2138 if ($ipfilter_ipset) {
2139 ruleset_addrule($ruleset, $chain, "-m set
! --match-set
$ipfilter_ipset src
", "-j DROP
");
2141 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2144 my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j
$accept";
2145 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2148 sub ruleset_add_group_rule {
2149 my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2151 my $group = $rule->{action};
2152 my $group_chain = "GROUP-
$group-$direction";
2153 if(!ruleset_chain_exist($ruleset, $group_chain)){
2154 generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2157 if ($direction eq 'OUT' && $rule->{iface_out}) {
2158 ruleset_addrule($ruleset, $chain, "-o
$rule->{iface_out
}", "-j
$group_chain");
2159 } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2160 ruleset_addrule($ruleset, $chain, "-i
$rule->{iface_in
}", "-j
$group_chain");
2162 ruleset_addrule($ruleset, $chain, "", "-j
$group_chain");
2165 ruleset_addrule($ruleset, $chain, "-m mark
--mark
$FWACCEPTMARK_ON", "-j
$action");
2168 sub ruleset_generate_vm_rules {
2169 my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
2171 my $lc_direction = lc($direction);
2173 my $in_accept = generate_nfqueue($options);
2175 foreach my $rule (@$rules) {
2176 next if $rule->{iface} && $rule->{iface} ne $netid;
2177 next if !$rule->{enable} || $rule->{errors};
2178 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2180 if ($rule->{type} eq 'group') {
2181 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2182 $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2184 next if $rule->{type} ne $lc_direction;
2186 if ($direction eq 'OUT') {
2187 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" });
2188 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf);
2190 rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject
" });
2191 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf);
2199 sub generate_nfqueue {
2202 if ($options->{ips}) {
2203 my $action = "NFQUEUE
";
2204 if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2205 if (defined($3) && defined($1)) {
2206 $action .= " --queue-balance
$1:$3";
2207 } elsif (defined($1)) {
2208 $action .= " --queue-num
$1";
2211 $action .= " --queue-bypass
" if $feature_ipset_nomatch; #need kernel 3.10
2218 sub ruleset_generate_vm_ipsrules {
2219 my ($ruleset, $options, $direction, $iface) = @_;
2221 if ($options->{ips} && $direction eq 'IN') {
2222 my $nfqueue = generate_nfqueue($options);
2224 if (!ruleset_chain_exist($ruleset, "PVEFW-IPS
")) {
2225 ruleset_create_chain($ruleset, "PVEFW-IPS
");
2228 ruleset_addrule($ruleset, "PVEFW-IPS
", "-m physdev
--physdev-out
$iface --physdev-is-bridged
", "-j
$nfqueue");
2232 sub generate_tap_rules_direction {
2233 my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2235 my $lc_direction = lc($direction);
2237 my $rules = $vmfw_conf->{rules};
2239 my $options = $vmfw_conf->{options};
2240 my $loglevel = get_option_log_level($options, "log_level_
${lc_direction
}");
2242 my $tapchain = "$iface-$direction";
2244 my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2245 my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2246 if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2248 # create chain with mac and ip filter
2249 ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2251 if ($options->{enable}) {
2252 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2254 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2259 if ($direction eq 'OUT') {
2260 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2262 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2265 my $accept = generate_nfqueue($options);
2266 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : $accept;
2267 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2269 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : 'ACCEPT';
2270 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2273 # plug the tap chain to bridge chain
2274 if ($direction eq 'IN') {
2275 ruleset_addrule($ruleset, "PVEFW-FWBR-IN
",
2276 "-m physdev
--physdev-is-bridged
--physdev-out
$iface", "-j
$tapchain");
2278 ruleset_addrule($ruleset, "PVEFW-FWBR-OUT
",
2279 "-m physdev
--physdev-is-bridged
--physdev-in
$iface", "-j
$tapchain");
2283 sub enable_host_firewall {
2284 my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2286 my $options = $hostfw_conf->{options};
2287 my $cluster_options = $cluster_conf->{options};
2288 my $rules = $hostfw_conf->{rules};
2289 my $cluster_rules = $cluster_conf->{rules};
2291 # host inbound firewall
2292 my $chain = "PVEFW-HOST-IN
";
2293 ruleset_create_chain($ruleset, $chain);
2295 my $loglevel = get_option_log_level($options, "log_level_in
");
2297 ruleset_addrule($ruleset, $chain, "-i lo
", "-j ACCEPT
");
2299 ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2300 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2301 ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2303 # we use RETURN because we need to check also tap rules
2304 my $accept_action = 'RETURN';
2306 ruleset_addrule($ruleset, $chain, "-p igmp
", "-j
$accept_action"); # important for multicast
2308 # add host rules first, so that cluster wide rules can be overwritten
2309 foreach my $rule (@$rules, @$cluster_rules) {
2310 next if !$rule->{enable} || $rule->{errors};
2311 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2313 $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2316 if ($rule->{type} eq 'group') {
2317 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2318 } elsif ($rule->{type} eq 'in') {
2319 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" });
2320 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf);
2324 delete $rule->{iface_in};
2327 # allow standard traffic for management ipset (includes cluster network)
2328 my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management
", $ipversion);
2329 my $mngmntsrc = "-m set
--match-set
${mngmnt_ipset_chain
} src
";
2330 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
8006", "-j
$accept_action"); # PVE API
2331 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
5900:5999", "-j
$accept_action"); # PVE VNC Console
2332 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
3128", "-j
$accept_action"); # SPICE Proxy
2333 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
22", "-j
$accept_action"); # SSH
2335 my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2336 my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2339 if ($localnet && ($ipversion == $localnet_ver)) {
2340 my $corosync_rule = "-p udp
--dport
5404:5405";
2341 ruleset_addrule($ruleset, $chain, "-s
$localnet -d
$localnet $corosync_rule", "-j
$accept_action");
2342 ruleset_addrule($ruleset, $chain, "-s
$localnet -m addrtype
--dst-type MULTICAST
$corosync_rule", "-j
$accept_action");
2345 # implement input policy
2346 my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2347 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2349 # host outbound firewall
2350 $chain = "PVEFW-HOST-OUT
";
2351 ruleset_create_chain($ruleset, $chain);
2353 $loglevel = get_option_log_level($options, "log_level_out
");
2355 ruleset_addrule($ruleset, $chain, "-o lo
", "-j ACCEPT
");
2357 ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2359 # we use RETURN because we may want to check other thigs later
2360 $accept_action = 'RETURN';
2361 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j
$accept_action");
2363 ruleset_addrule($ruleset, $chain, "-p igmp
", "-j
$accept_action"); # important for multicast
2365 # add host rules first, so that cluster wide rules can be overwritten
2366 foreach my $rule (@$rules, @$cluster_rules) {
2367 next if !$rule->{enable} || $rule->{errors};
2368 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2370 $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2372 if ($rule->{type} eq 'group') {
2373 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2374 } elsif ($rule->{type} eq 'out') {
2375 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" });
2376 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf);
2380 delete $rule->{iface_out};
2383 # allow standard traffic on cluster network
2384 if ($localnet && ($ipversion == $localnet_ver)) {
2385 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
8006", "-j
$accept_action"); # PVE API
2386 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
22", "-j
$accept_action"); # SSH
2387 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
5900:5999", "-j
$accept_action"); # PVE VNC Console
2388 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
3128", "-j
$accept_action"); # SPICE Proxy
2390 my $corosync_rule = "-p udp
--dport
5404:5405";
2391 ruleset_addrule($ruleset, $chain, "-d
$localnet $corosync_rule", "-j
$accept_action");
2392 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
$corosync_rule", "-j
$accept_action");
2395 # implement output policy
2396 $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2397 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2399 ruleset_addrule($ruleset, "PVEFW-OUTPUT
", "", "-j PVEFW-HOST-OUT
");
2400 ruleset_addrule($ruleset, "PVEFW-INPUT
", "", "-j PVEFW-HOST-IN
");
2403 sub generate_group_rules {
2404 my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2406 my $rules = $cluster_conf->{groups}->{$group};
2409 warn "no such security group
'$group'\n";
2410 $rules = []; # create empty chain
2413 my $chain = "GROUP-
${group
}-IN
";
2415 ruleset_create_chain($ruleset, $chain);
2416 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2418 foreach my $rule (@$rules) {
2419 next if $rule->{type} ne 'in';
2420 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2421 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" });
2422 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2425 $chain = "GROUP-
${group
}-OUT
";
2427 ruleset_create_chain($ruleset, $chain);
2428 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2430 foreach my $rule (@$rules) {
2431 next if $rule->{type} ne 'out';
2432 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2433 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2434 # check also other tap rules later
2435 rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject
" });
2436 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2441 my $valid_netdev_names = {};
2442 for (my $i = 0; $i < $MAX_NETS; $i++) {
2443 $valid_netdev_names->{"net
$i"} = 1;
2446 sub get_mark_values {
2447 my ($value, $mask) = @_;
2448 $value = hex($value) if $value =~ /^0x/;
2449 $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2450 $mask = 0xffffffff if !defined($mask);
2451 return ($value, $mask);
2455 my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2457 my $orig_line = $line;
2461 # we can add single line comments to the end of the rule
2462 if ($line =~ s/#\s*(.*?)\s*$//) {
2463 $rule->{comment} = decode('utf8', $1);
2466 # we can disable a rule when prefixed with '|'
2468 $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2470 $line =~ s/^(\S+)\s+(\S+)\s*// ||
2471 die "unable to parse rule
: $line\n";
2473 $rule->{type} = lc($1);
2474 $rule->{action} = $2;
2476 if ($rule->{type} eq 'in' || $rule->{type} eq 'out') {
2477 if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2478 $rule->{macro} = $1;
2479 $rule->{action} = $2;
2483 while (length($line)) {
2484 if ($line =~ s/^-i (\S+)\s*//) {
2485 $rule->{iface} = $1;
2489 last if $rule->{type} eq 'group';
2491 if ($line =~ s/^-p (\S+)\s*//) {
2492 $rule->{proto} = $1;
2496 if ($line =~ s/^-dport (\S+)\s*//) {
2497 $rule->{dport} = $1;
2501 if ($line =~ s/^-sport (\S+)\s*//) {
2502 $rule->{sport} = $1;
2505 if ($line =~ s/^-source (\S+)\s*//) {
2506 $rule->{source} = $1;
2509 if ($line =~ s/^-dest (\S+)\s*//) {
2517 die "unable to parse rule parameters
: $line\n" if length($line);
2519 $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2520 if ($rule->{errors}) {
2521 # The verbose flag really means we're running from the CLI and want
2522 # output on the console - in the other case we really want such errors
2523 # to go into the syslog instead.
2524 my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2525 $log->("$prefix - errors
in rule parameters
: $orig_line\n");
2526 foreach my $p (keys %{$rule->{errors}}) {
2527 $log->(" $p: $rule->{errors
}->{$p}\n");
2534 sub parse_vmfw_option {
2539 my $loglevels = "emerg
|alert
|crit
|err
|warning
|notice
|info
|debug
|nolog
";
2541 if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2544 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2546 $value = $2 ? lc($3) : '';
2547 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2550 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2554 die "can
't parse option '$line'\n"
2557 return ($opt, $value);
2560 sub parse_hostfw_option {
2565 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2567 if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
2570 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2572 $value = $2 ? lc($3) : '';
2573 } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2577 die "can't parse option
'$line'\n"
2580 return ($opt, $value);
2583 sub parse_clusterfw_option {
2588 if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2591 if (($value > 1) && ((time() - $value) > 60)) {
2594 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2598 die "can
't parse option '$line'\n"
2601 return ($opt, $value);
2605 my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2607 my $alias = lc($cidr);
2608 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2609 $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2611 die "no such alias '$cidr'\n" if !$e;;
2613 return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2616 sub parse_ip_or_cidr {
2621 if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2624 } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2628 die "value does not look like a valid IP address or CIDR network\n";
2631 return wantarray ? ($cidr, $ipversion) : $cidr;
2637 # we can add single line comments to the end of the line
2638 my $comment = decode('utf8
', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2640 if ($line =~ m/^(\S+)\s(\S+)$/) {
2641 my ($name, $cidr) = ($1, $2);
2644 ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2649 ipversion => $ipversion,
2651 $data->{comment} = $comment if $comment;
2658 sub generic_fw_config_parser {
2659 my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2664 my $res = $empty_conf;
2666 while (defined(my $line = <$fh>)) {
2667 next if $line =~ m/^#/;
2668 next if $line =~ m/^\s*$/;
2672 my $linenr = $fh->input_line_number();
2673 my $prefix = "$filename (line $linenr)";
2675 if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2676 $section = 'options
';
2680 if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2681 $section = 'aliases
';
2685 if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2686 $section = 'groups
';
2690 die "security group name too long\n" if length($group) > $max_group_name_length;
2691 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2694 ($section, $group, $comment) = undef;
2695 warn "$prefix: $err";
2699 $res->{$section}->{$group} = [];
2700 $res->{group_comments}->{$group} = decode('utf8
', $comment)
2705 if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2710 if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2715 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2716 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2719 ($section, $group, $comment) = undef;
2720 warn "$prefix: $err";
2724 $res->{$section}->{$group} = [];
2725 $res->{ipset_comments}->{$group} = decode('utf8
', $comment)
2731 warn "$prefix: skip line - no section\n";
2735 if ($section eq 'options
') {
2738 if ($rule_env eq 'cluster
') {
2739 ($opt, $value) = parse_clusterfw_option($line);
2740 } elsif ($rule_env eq 'host
') {
2741 ($opt, $value) = parse_hostfw_option($line);
2743 ($opt, $value) = parse_vmfw_option($line);
2745 $res->{options}->{$opt} = $value;
2747 warn "$prefix: $@" if $@;
2748 } elsif ($section eq 'aliases
') {
2750 my $data = parse_alias($line);
2751 $res->{aliases}->{lc($data->{name})} = $data;
2753 warn "$prefix: $@" if $@;
2754 } elsif ($section eq 'rules
') {
2756 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2758 warn "$prefix: $err";
2761 push @{$res->{$section}}, $rule;
2762 } elsif ($section eq 'groups
') {
2764 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group
', $verbose); };
2766 warn "$prefix: $err";
2769 push @{$res->{$section}->{$group}}, $rule;
2770 } elsif ($section eq 'ipset
') {
2771 # we can add single line comments to the end of the rule
2772 my $comment = decode('utf8
', $1) if $line =~ s/#\s*(.*?)\s*$//;
2774 $line =~ m/^(\!)?\s*(\S+)\s*$/;
2779 if ($nomatch && !$feature_ipset_nomatch) {
2780 $errors->{nomatch} = "nomatch not supported by kernel";
2784 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2785 resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2787 $cidr = parse_ip_or_cidr($cidr);
2792 $errors->{cidr} = $err;
2795 if ($cidr =~ m!/0+$!) {
2796 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
2799 my $entry = { cidr => $cidr };
2800 $entry->{nomatch} = 1 if $nomatch;
2801 $entry->{comment} = $comment if $comment;
2802 $entry->{errors} = $errors if $errors;
2804 if ($verbose && $errors) {
2805 warn "$prefix - errors in ipset '$group': $line\n";
2806 foreach my $p (keys %{$errors}) {
2807 warn " $p: $errors->{$p}\n";
2811 push @{$res->{$section}->{$group}}, $entry;
2813 warn "$prefix: skip line - unknown section\n";
2821 sub parse_hostfw_config {
2822 my ($filename, $fh, $cluster_conf, $verbose) = @_;
2824 my $empty_conf = { rules => [], options => {}};
2826 return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host
');
2829 sub parse_vmfw_config {
2830 my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2837 ipset_comments => {},
2840 return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2843 sub parse_clusterfw_config {
2844 my ($filename, $fh, $verbose) = @_;
2854 group_comments => {},
2856 ipset_comments => {},
2859 return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster
');
2863 my ($code, @param) = @_;
2867 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2874 sub read_local_vm_config {
2879 my $vmdata = { qemu => $qemu, lxc => $lxc };
2881 my $vmlist = PVE::Cluster::get_vmlist();
2882 return $vmdata if !$vmlist || !$vmlist->{ids};
2883 my $ids = $vmlist->{ids};
2885 foreach my $vmid (keys %$ids) {
2886 next if !$vmid; # skip VE0
2887 my $d = $ids->{$vmid};
2888 next if !$d->{node} || $d->{node} ne $nodename;
2889 next if !$d->{type};
2890 if ($d->{type} eq 'qemu
') {
2891 if ($have_qemu_server) {
2892 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
2893 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2894 $qemu->{$vmid} = $conf;
2897 } elsif ($d->{type} eq 'lxc
') {
2899 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
2900 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2901 $lxc->{$vmid} = $conf;
2910 sub load_vmfw_conf {
2911 my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2915 $dir = $pvefw_conf_dir if !defined($dir);
2917 my $filename = "$dir/$vmid.fw";
2918 if (my $fh = IO::File->new($filename, O_RDONLY)) {
2919 $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2920 $vmfw_conf->{vmid} = $vmid;
2926 my $format_rules = sub {
2927 my ($rules, $allow_iface) = @_;
2931 foreach my $rule (@$rules) {
2932 if ($rule->{type} eq 'in' || $rule->{type} eq 'out
' || $rule->{type} eq 'group
') {
2933 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2934 $raw .= uc($rule->{type});
2935 if ($rule->{macro}) {
2936 $raw .= " $rule->{macro}($rule->{action})";
2938 $raw .= " " . $rule->{action};
2940 if ($allow_iface && $rule->{iface}) {
2941 $raw .= " -i $rule->{iface}";
2944 if ($rule->{type} ne 'group
') {
2945 $raw .= " -source $rule->{source}" if $rule->{source};
2946 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2947 $raw .= " -p $rule->{proto}" if $rule->{proto};
2948 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2949 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2952 $raw .= " # " . encode('utf8
', $rule->{comment})
2953 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2956 die "unknown rule type '$rule->{type
}'";
2963 my $format_options = sub {
2968 $raw .= "[OPTIONS]\n\n";
2969 foreach my $opt (keys %$options) {
2970 $raw .= "$opt: $options->{$opt}\n";
2977 my $format_aliases = sub {
2982 $raw .= "[ALIASES]\n\n";
2983 foreach my $k (keys %$aliases) {
2984 my $e = $aliases->{$k};
2985 $raw .= "$e->{name} $e->{cidr}";
2986 $raw .= " # " . encode('utf8
', $e->{comment})
2987 if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2995 my $format_ipsets = sub {
3000 foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
3001 if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
3002 my $utf8comment = encode('utf8
', $comment);
3003 $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3005 $raw .= "[IPSET $ipset]\n\n";
3007 my $options = $fw_conf->{ipset}->{$ipset};
3010 foreach my $entry (@$options) {
3011 $nethash->{$entry->{cidr}} = $entry;
3014 foreach my $cidr (sort keys %$nethash) {
3015 my $entry = $nethash->{$cidr};
3016 my $line = $entry->{nomatch} ? '!' : '';
3017 $line .= $entry->{cidr};
3018 $line .= " # " . encode('utf8
', $entry->{comment})
3019 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3029 sub save_vmfw_conf {
3030 my ($vmid, $vmfw_conf) = @_;
3034 my $options = $vmfw_conf->{options};
3035 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3037 my $aliases = $vmfw_conf->{aliases};
3038 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3040 $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
3042 my $rules = $vmfw_conf->{rules} || [];
3043 if ($rules && scalar(@$rules)) {
3044 $raw .= "[RULES]\n\n";
3045 $raw .= &$format_rules($rules, 1);
3049 my $filename = "$pvefw_conf_dir/$vmid.fw";
3051 mkdir $pvefw_conf_dir;
3052 PVE::Tools::file_set_contents($filename, $raw);
3058 sub remove_vmfw_conf {
3061 my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3063 unlink $vmfw_conffile;
3066 sub clone_vmfw_conf {
3067 my ($vmid, $newid) = @_;
3069 my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3070 my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3072 if (-f $clonevm_conffile) {
3073 unlink $clonevm_conffile;
3075 if (-f $sourcevm_conffile) {
3076 my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3077 PVE::Tools::file_set_contents($clonevm_conffile, $data);
3081 sub read_vm_firewall_configs {
3082 my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
3084 my $vmfw_configs = {};
3086 foreach my $vmid (keys %{$vmdata->{qemu}}) {
3087 my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm
', $vmid, $dir, $verbose);
3088 next if !$vmfw_conf->{options}; # skip if file does not exists
3089 $vmfw_configs->{$vmid} = $vmfw_conf;
3091 foreach my $vmid (keys %{$vmdata->{lxc}}) {
3092 my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct
', $vmid, $dir, $verbose);
3093 next if !$vmfw_conf->{options}; # skip if file does not exists
3094 $vmfw_configs->{$vmid} = $vmfw_conf;
3097 return $vmfw_configs;
3100 sub get_option_log_level {
3101 my ($options, $k) = @_;
3103 my $v = $options->{$k};
3104 $v = $default_log_level if !defined($v);
3106 return undef if $v eq '' || $v eq 'nolog
';
3108 $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
3110 return $v if ($v >= 0) && ($v <= 7);
3112 warn "unknown log level ($k = '$v')\n";
3117 sub generate_std_chains {
3118 my ($ruleset, $options, $ipversion) = @_;
3120 my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3122 my $loglevel = get_option_log_level($options, 'smurf_log_level
');
3123 my $chain = 'PVEFW-smurflog
';
3124 if ( $std_chains->{$chain} ) {
3125 foreach my $r (@{$std_chains->{$chain}}) {
3126 $r->{log} = $loglevel;
3130 # same as shorewall logflags action.
3131 $loglevel = get_option_log_level($options, 'tcp_flags_log_level
');
3132 $chain = 'PVEFW-logflags
';
3133 if ( $std_chains->{$chain} ) {
3134 foreach my $r (@{$std_chains->{$chain}}) {
3135 $r->{log} = $loglevel;
3139 foreach my $chain (keys %$std_chains) {
3140 ruleset_create_chain($ruleset, $chain);
3141 foreach my $rule (@{$std_chains->{$chain}}) {
3143 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
3145 die "rule $rule as string - should not happen";
3151 sub generate_ipset_chains {
3152 my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3154 foreach my $ipset (keys %{$ipsets}) {
3156 my $options = $ipsets->{$ipset};
3158 if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3159 if (my $ips = $device_ips->{$1}) {
3160 $options = [@$options, @$ips];
3166 foreach my $entry (@$options) {
3167 next if $entry->{errors}; # skip entries with errors
3170 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3171 ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3173 ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3175 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3177 # ip_compress_address takes an address only, no CIDR
3178 my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3179 $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3180 $cidr .= $prefix_len if defined($prefix_len);
3186 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3191 foreach my $ipversion (4, 6) {
3192 my $data = $nethash->{$ipversion};
3194 my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3196 my $hashsize = scalar(@$options);
3197 if ($hashsize <= 64) {
3200 $hashsize = round_powerof2($hashsize);
3203 my $family = $ipversion == "6" ? "inet6" : "inet";
3205 $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3207 foreach my $cidr (sort keys %$data) {
3208 my $entry = $data->{$cidr};
3210 my $cmd = "add $name $cidr";
3211 if ($entry->{nomatch}) {
3212 if ($feature_ipset_nomatch) {
3213 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3215 warn "ignore !$cidr - nomatch not supported by kernel\n";
3218 push @{$ipset_ruleset->{$name}}, $cmd;
3225 sub round_powerof2 {
3229 $int |= $int >> $_ foreach (1,2,4,8,16);
3233 sub load_clusterfw_conf {
3234 my ($filename, $verbose) = @_;
3236 $filename = $clusterfw_conf_filename if !defined($filename);
3238 my $cluster_conf = {};
3239 if (my $fh = IO::File->new($filename, O_RDONLY)) {
3240 $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3243 return $cluster_conf;
3246 sub save_clusterfw_conf {
3247 my ($cluster_conf) = @_;
3251 my $options = $cluster_conf->{options};
3252 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3254 my $aliases = $cluster_conf->{aliases};
3255 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3257 $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3259 my $rules = $cluster_conf->{rules};
3260 if ($rules && scalar(@$rules)) {
3261 $raw .= "[RULES]\n\n";
3262 $raw .= &$format_rules($rules, 1);
3266 if ($cluster_conf->{groups}) {
3267 foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3268 my $rules = $cluster_conf->{groups}->{$group};
3269 if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3270 my $utf8comment = encode('utf8
', $comment);
3271 $raw .= "[group $group] # $utf8comment\n\n";
3273 $raw .= "[group $group]\n\n";
3276 $raw .= &$format_rules($rules, 0);
3282 mkdir $pvefw_conf_dir;
3283 PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3285 unlink $clusterfw_conf_filename;
3289 sub load_hostfw_conf {
3290 my ($cluster_conf, $filename, $verbose) = @_;
3292 $filename = $hostfw_conf_filename if !defined($filename);
3294 my $hostfw_conf = {};
3295 if (my $fh = IO::File->new($filename, O_RDONLY)) {
3296 $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3298 return $hostfw_conf;
3301 sub save_hostfw_conf {
3302 my ($hostfw_conf) = @_;
3306 my $options = $hostfw_conf->{options};
3307 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3309 my $rules = $hostfw_conf->{rules};
3310 if ($rules && scalar(@$rules)) {
3311 $raw .= "[RULES]\n\n";
3312 $raw .= &$format_rules($rules, 1);
3317 PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3319 unlink $hostfw_conf_filename;
3324 my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3328 # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3329 $pve_std_chains = dclone($pve_std_chains_conf);
3331 if ($vmdata) { # test mode
3332 my $testdir = $vmdata->{testdir} || die "no test directory specified";
3333 my $filename = "$testdir/cluster.fw";
3334 $cluster_conf = load_clusterfw_conf($filename, $verbose);
3336 $filename = "$testdir/host.fw";
3337 $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3339 $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3340 } else { # normal operation
3341 $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3343 $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3345 $vmdata = read_local_vm_config();
3346 $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3349 return ({},{},{}) if !$cluster_conf->{options}->{enable};
3352 if ($cluster_conf->{aliases}->{local_network}) {
3353 $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3356 ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3358 $cluster_conf->{aliases}->{local_network} = {
3359 name => 'local_network
', cidr => $localnet, ipversion => $localnet_ver };
3362 push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3364 my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3365 my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3366 my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3368 return ($ruleset, $ipset_ruleset, $rulesetv6);
3371 sub compile_iptables_filter {
3372 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3376 ruleset_create_chain($ruleset, "PVEFW-INPUT");
3377 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3379 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3381 my $hostfw_options = $hostfw_conf->{options} || {};
3383 # fixme: what log level should we use here?
3384 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3386 ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3388 ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3389 ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3391 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3393 ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3394 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3396 generate_std_chains($ruleset, $hostfw_options, $ipversion);
3398 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3400 if ($hostfw_enable) {
3401 eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3402 warn $@ if $@; # just to be sure - should not happen
3405 # generate firewall rules for QEMU VMs
3406 foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3408 my $conf = $vmdata->{qemu}->{$vmid};
3409 my $vmfw_conf = $vmfw_configs->{$vmid};
3410 return if !$vmfw_conf;
3412 foreach my $netid (sort keys %$conf) {
3413 next if $netid !~ m/^net(\d+)$/;
3414 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3415 next if !$net->{firewall};
3416 my $iface = "tap${vmid}i$1";
3418 my $macaddr = $net->{macaddr};
3419 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3420 $vmfw_conf, $vmid, 'IN
', $ipversion);
3421 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3422 $vmfw_conf, $vmid, 'OUT
', $ipversion);
3425 warn $@ if $@; # just to be sure - should not happen
3428 # generate firewall rules for LXC containers
3429 foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3431 my $conf = $vmdata->{lxc}->{$vmid};
3432 my $vmfw_conf = $vmfw_configs->{$vmid};
3433 return if !$vmfw_conf;
3435 if ($vmfw_conf->{options}->{enable}) {
3436 foreach my $netid (sort keys %$conf) {
3437 next if $netid !~ m/^net(\d+)$/;
3438 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3439 next if !$net->{firewall};
3440 my $iface = "veth${vmid}i$1";
3441 my $macaddr = $net->{hwaddr};
3442 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3443 $vmfw_conf, $vmid, 'IN
', $ipversion);
3444 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3445 $vmfw_conf, $vmid, 'OUT
', $ipversion);
3449 warn $@ if $@; # just to be sure - should not happen
3452 if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3453 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3459 sub mac_to_linklocal {
3461 my @parts = split(/:/, $macaddr);
3462 # The standard link local address uses the fe80::/64 prefix with the
3463 # modified EUI-64 identifier derived from the MAC address by flipping the
3464 # universal/local bit and inserting FF:FE in the middle.
3466 $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3467 my @meui64 = (@parts[0,1,2], 'ff
', 'fe
', @parts[3,4,5]);
3468 return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3471 sub compile_ipsets {
3472 my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3475 if ($cluster_conf->{aliases}->{local_network}) {
3476 $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3479 ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3481 $cluster_conf->{aliases}->{local_network} = {
3482 name => 'local_network
', cidr => $localnet, ipversion => $localnet_ver };
3485 push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3488 my $ipset_ruleset = {};
3490 # generate ipsets for QEMU VMs
3491 foreach my $vmid (keys %{$vmdata->{qemu}}) {
3493 my $conf = $vmdata->{qemu}->{$vmid};
3494 my $vmfw_conf = $vmfw_configs->{$vmid};
3495 return if !$vmfw_conf;
3497 # When the 'ipfilter
' option is enabled every device for which there
3498 # is no 'ipfilter-netX
' ipset defiend gets an implicit empty default
3500 # The reason is that ipfilter ipsets are always filled with standard
3501 # IPv6 link-local filters.
3502 my $ipsets = $vmfw_conf->{ipset};
3503 my $implicit_sets = {};
3505 my $device_ips = {};
3506 foreach my $netid (keys %$conf) {
3507 next if $netid !~ m/^net(\d+)$/;
3508 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3509 next if !$net->{firewall};
3511 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3512 $implicit_sets->{"ipfilter-$netid"} = [];
3515 my $macaddr = $net->{macaddr};
3516 my $linklocal = mac_to_linklocal($macaddr);
3517 $device_ips->{$netid} = [
3518 { cidr => $linklocal },
3519 { cidr => 'fe80
::/10', nomatch => 1 }
3523 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3524 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3526 warn $@ if $@; # just to be sure - should not happen
3529 # generate firewall rules for LXC containers
3530 foreach my $vmid (keys %{$vmdata->{lxc}}) {
3532 my $conf = $vmdata->{lxc}->{$vmid};
3533 my $vmfw_conf = $vmfw_configs->{$vmid};
3534 return if !$vmfw_conf;
3536 # When the 'ipfilter
' option is enabled every device for which there
3537 # is no 'ipfilter-netX
' ipset defiend gets an implicit empty default
3539 # The reason is that ipfilter ipsets are always filled with standard
3540 # IPv6 link-local filters, as well as the IP addresses configured
3541 # for the container.
3542 my $ipsets = $vmfw_conf->{ipset};
3543 my $implicit_sets = {};
3545 my $device_ips = {};
3546 foreach my $netid (keys %$conf) {
3547 next if $netid !~ m/^net(\d+)$/;
3548 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3549 next if !$net->{firewall};
3551 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3552 $implicit_sets->{"ipfilter-$netid"} = [];
3555 my $macaddr = $net->{hwaddr};
3556 my $linklocal = mac_to_linklocal($macaddr);
3557 my $set = $device_ips->{$netid} = [
3558 { cidr => $linklocal },
3559 { cidr => 'fe80
::/10', nomatch => 1 }
3561 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3562 push @$set, { cidr => $1 };
3564 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3565 push @$set, { cidr => $1 };
3569 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3570 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3572 warn $@ if $@; # just to be sure - should not happen
3575 generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3577 return $ipset_ruleset;
3580 sub get_ruleset_status {
3581 my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3583 my $statushash = {};
3585 foreach my $chain (sort keys %$ruleset) {
3586 my $sig = &$digest_fn($ruleset->{$chain});
3588 $statushash->{$chain}->{sig} = $sig;
3590 my $oldsig = $active_chains->{$chain};
3591 if (!defined($oldsig)) {
3592 $statushash->{$chain}->{action} = 'create
';
3594 if ($oldsig eq $sig) {
3595 $statushash->{$chain}->{action} = 'exists';
3597 $statushash->{$chain}->{action} = 'update
';
3600 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3601 foreach my $cmd (@{$ruleset->{$chain}}) {
3602 print "\t$cmd\n" if $verbose;
3606 foreach my $chain (sort keys %$active_chains) {
3607 if (!defined($ruleset->{$chain})) {
3608 my $sig = $active_chains->{$chain};
3609 $statushash->{$chain}->{action} = 'delete';
3610 $statushash->{$chain}->{sig} = $sig;
3611 print "delete $chain ($sig)\n" if $verbose;
3618 sub print_sig_rule {
3619 my ($chain, $sig) = @_;
3621 # We just use this to store a SHA1 checksum used to detect changes
3622 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3625 sub get_ruleset_cmdlist {
3626 my ($ruleset, $verbose, $iptablescmd) = @_;
3628 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3630 my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3631 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3633 # create missing chains first
3634 foreach my $chain (sort keys %$ruleset) {
3635 my $stat = $statushash->{$chain};
3636 die "internal error" if !$stat;
3637 next if $stat->{action} ne 'create
';
3639 $cmdlist .= ":$chain - [0:0]\n";
3642 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3643 my $chain = "PVEFW-$h";
3644 if ($ruleset->{$chain} && !$hooks->{$h}) {
3645 $cmdlist .= "-A $h -j $chain\n";
3649 foreach my $chain (sort keys %$ruleset) {
3650 my $stat = $statushash->{$chain};
3651 die "internal error" if !$stat;
3653 if ($stat->{action
} eq 'update' || $stat->{action
} eq 'create') {
3654 $cmdlist .= "-F $chain\n";
3655 foreach my $cmd (@{$ruleset->{$chain}}) {
3656 $cmdlist .= "$cmd\n";
3658 $cmdlist .= print_sig_rule
($chain, $stat->{sig
});
3659 } elsif ($stat->{action
} eq 'delete') {
3660 die "internal error"; # this should not happen
3661 } elsif ($stat->{action
} eq 'exists') {
3664 die "internal error - unknown status '$stat->{action}'";
3668 foreach my $chain (keys %$statushash) {
3669 next if $statushash->{$chain}->{action
} ne 'delete';
3670 $cmdlist .= "-F $chain\n";
3672 foreach my $chain (keys %$statushash) {
3673 next if $statushash->{$chain}->{action
} ne 'delete';
3674 next if $chain eq 'PVEFW-INPUT';
3675 next if $chain eq 'PVEFW-OUTPUT';
3676 next if $chain eq 'PVEFW-FORWARD';
3677 $cmdlist .= "-X $chain\n";
3680 my $changes = $cmdlist ne "*filter\n" ?
1 : 0;
3682 $cmdlist .= "COMMIT\n";
3684 return wantarray ?
($cmdlist, $changes) : $cmdlist;
3687 sub get_ipset_cmdlist
{
3688 my ($ruleset, $verbose) = @_;
3692 my $delete_cmdlist = "";
3694 my $active_chains = ipset_get_chains
();
3695 my $statushash = get_ruleset_status
($ruleset, $active_chains, \
&ipset_chain_digest
, $verbose);
3697 # remove stale _swap chains
3698 foreach my $chain (keys %$active_chains) {
3699 if ($chain =~ m/^PVEFW-\S+_swap$/) {
3700 $cmdlist .= "destroy $chain\n";
3704 foreach my $chain (keys %$ruleset) {
3705 my $stat = $statushash->{$chain};
3706 die "internal error" if !$stat;
3708 if ($stat->{action
} eq 'create') {
3709 foreach my $cmd (@{$ruleset->{$chain}}) {
3710 $cmdlist .= "$cmd\n";
3715 foreach my $chain (keys %$ruleset) {
3716 my $stat = $statushash->{$chain};
3717 die "internal error" if !$stat;
3719 if ($stat->{action
} eq 'update') {
3720 my $chain_swap = $chain."_swap";
3722 foreach my $cmd (@{$ruleset->{$chain}}) {
3723 $cmd =~ s/$chain/$chain_swap/;
3724 $cmdlist .= "$cmd\n";
3726 $cmdlist .= "swap $chain_swap $chain\n";
3727 $cmdlist .= "flush $chain_swap\n";
3728 $cmdlist .= "destroy $chain_swap\n";
3732 # the remove unused chains
3733 foreach my $chain (keys %$statushash) {
3734 next if $statushash->{$chain}->{action
} ne 'delete';
3736 $delete_cmdlist .= "flush $chain\n";
3737 $delete_cmdlist .= "destroy $chain\n";
3740 my $changes = ($cmdlist || $delete_cmdlist) ?
1 : 0;
3742 return ($cmdlist, $delete_cmdlist, $changes);
3746 my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3748 enable_bridge_firewall
();
3750 my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3751 get_ipset_cmdlist
($ipset_ruleset, $verbose);
3753 my ($cmdlist, $changes) = get_ruleset_cmdlist
($ruleset, $verbose);
3754 my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist
($rulesetv6, $verbose, "ip6tables");
3757 if ($ipset_changes) {
3758 print "ipset changes:\n";
3759 print $ipset_create_cmdlist if $ipset_create_cmdlist;
3760 print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3764 print "iptables changes:\n";
3769 print "ip6tables changes:\n";
3774 my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3775 PVE
::Tools
::file_set_contents
($tmpfile, $ipset_create_cmdlist || '');
3777 ipset_restore_cmdlist
($ipset_create_cmdlist);
3779 $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3780 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlist || '');
3782 iptables_restore_cmdlist
($cmdlist);
3784 $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3785 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlistv6 || '');
3787 ip6tables_restore_cmdlist
($cmdlistv6);
3789 $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3790 PVE
::Tools
::file_set_contents
($tmpfile, $ipset_delete_cmdlist || '');
3792 ipset_restore_cmdlist
($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3794 # test: re-read status and check if everything is up to date
3795 my $active_chains = iptables_get_chains
();
3796 my $statushash = get_ruleset_status
($ruleset, $active_chains, \
&iptables_chain_digest
, 0);
3799 foreach my $chain (sort keys %$ruleset) {
3800 my $stat = $statushash->{$chain};
3801 if ($stat->{action
} ne 'exists') {
3802 warn "unable to update chain '$chain'\n";
3807 my $active_chainsv6 = iptables_get_chains
("ip6tables");
3808 my $statushashv6 = get_ruleset_status
($rulesetv6, $active_chainsv6, \
&iptables_chain_digest
, 0);
3810 foreach my $chain (sort keys %$rulesetv6) {
3811 my $stat = $statushashv6->{$chain};
3812 if ($stat->{action
} ne 'exists') {
3813 warn "unable to update chain '$chain'\n";
3818 die "unable to apply firewall changes\n" if $errors;
3820 update_nf_conntrack_max
($hostfw_conf);
3822 update_nf_conntrack_tcp_timeout_established
($hostfw_conf);
3826 sub update_nf_conntrack_max
{
3827 my ($hostfw_conf) = @_;
3829 my $max = 65536; # reasonable default
3831 my $options = $hostfw_conf->{options
} || {};
3833 if (defined($options->{nf_conntrack_max
}) && ($options->{nf_conntrack_max
} > $max)) {
3834 $max = $options->{nf_conntrack_max
};
3835 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3838 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3839 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3841 my $current = int(PVE
::Tools
::file_read_firstline
($filename_nf_conntrack_max) || $max);
3843 if ($current != $max) {
3844 my $hashsize = int($max/4);
3845 PVE
::ProcFSTools
::write_proc_entry
($filename_hashsize, $hashsize);
3846 PVE
::ProcFSTools
::write_proc_entry
($filename_nf_conntrack_max, $max);
3850 sub update_nf_conntrack_tcp_timeout_established
{
3851 my ($hostfw_conf) = @_;
3853 my $options = $hostfw_conf->{options
} || {};
3855 my $value = defined($options->{nf_conntrack_tcp_timeout_established
}) ?
$options->{nf_conntrack_tcp_timeout_established
} : 432000;
3857 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3860 sub remove_pvefw_chains
{
3862 PVE
::Firewall
::remove_pvefw_chains_iptables
("iptables");
3863 PVE
::Firewall
::remove_pvefw_chains_iptables
("ip6tables");
3864 PVE
::Firewall
::remove_pvefw_chains_ipset
();
3868 sub remove_pvefw_chains_iptables
{
3869 my ($iptablescmd) = @_;
3871 my ($chash, $hooks) = iptables_get_chains
($iptablescmd);
3872 my $cmdlist = "*filter\n";
3874 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3876 $cmdlist .= "-D $h -j PVEFW-$h\n";
3880 foreach my $chain (keys %$chash) {
3881 $cmdlist .= "-F $chain\n";
3884 foreach my $chain (keys %$chash) {
3885 $cmdlist .= "-X $chain\n";
3887 $cmdlist .= "COMMIT\n";
3889 if($iptablescmd eq "ip6tables") {
3890 ip6tables_restore_cmdlist
($cmdlist);
3892 iptables_restore_cmdlist
($cmdlist);
3896 sub remove_pvefw_chains_ipset
{
3898 my $ipset_chains = ipset_get_chains
();
3902 foreach my $chain (keys %$ipset_chains) {
3903 $cmdlist .= "flush $chain\n";
3904 $cmdlist .= "destroy $chain\n";
3907 ipset_restore_cmdlist
($cmdlist) if $cmdlist;
3911 my $cluster_conf = load_clusterfw_conf
();
3912 my $cluster_options = $cluster_conf->{options
};
3913 my $enable = $cluster_options->{enable
};
3917 # load required modules here
3923 my $cluster_conf = load_clusterfw_conf
();
3924 my $cluster_options = $cluster_conf->{options
};
3926 if (!$cluster_options->{enable
}) {
3927 PVE
::Firewall
::remove_pvefw_chains
();
3931 my $hostfw_conf = load_hostfw_conf
($cluster_conf);
3933 my ($ruleset, $ipset_ruleset, $rulesetv6) = compile
($cluster_conf, $hostfw_conf);
3935 apply_ruleset
($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);