8 use Socket
qw(AF_INET6 inet_ntop inet_pton);
10 use PVE
::Exception
qw(raise raise_param_exc);
11 use PVE
::JSONSchema
qw(register_standard_option get_standard_option);
14 use PVE
::Tools
qw($IPV4RE $IPV6RE);
21 use PVE
::Tools
qw(run_command lock_file dir_glob_foreach);
23 use Storable
qw(dclone);
25 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
26 my $pvefw_conf_dir = "/etc/pve/firewall";
27 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
29 # dynamically include PVE::QemuServer and PVE::LXC
30 # to avoid dependency problems
33 require PVE
::QemuServer
;
34 require PVE
::QemuConfig
;
35 $have_qemu_server = 1;
45 my $pve_fw_status_dir = "/var/lib/pve-firewall";
47 mkdir $pve_fw_status_dir; # make sure this exists
49 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
50 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
51 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
53 my $max_alias_name_length = 64;
54 my $max_ipset_name_length = 64;
55 my $max_group_name_length = 18;
57 my $PROTOCOLS_WITH_PORTS = {
59 udplite
=> 1, 136 => 1,
65 PVE
::JSONSchema
::register_format
('IPorCIDR', \
&pve_verify_ip_or_cidr
);
66 sub pve_verify_ip_or_cidr
{
67 my ($cidr, $noerr) = @_;
69 if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
70 return $cidr if Net
::IP-
>new($cidr);
71 return undef if $noerr;
72 die Net
::IP
::Error
() . "\n";
74 return undef if $noerr;
75 die "value does not look like a valid IP address or CIDR network\n";
78 PVE
::JSONSchema
::register_format
('IPorCIDRorAlias', \
&pve_verify_ip_or_cidr_or_alias
);
79 sub pve_verify_ip_or_cidr_or_alias
{
80 my ($cidr, $noerr) = @_;
82 return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
84 return pve_verify_ip_or_cidr
($cidr, $noerr);
87 PVE
::JSONSchema
::register_standard_option
('ipset-name', {
88 description
=> "IP set name.",
90 pattern
=> $ipset_name_pattern,
92 maxLength
=> $max_ipset_name_length,
95 PVE
::JSONSchema
::register_standard_option
('pve-fw-alias', {
96 description
=> "Alias name.",
98 pattern
=> $ip_alias_pattern,
100 maxLength
=> $max_alias_name_length,
103 PVE
::JSONSchema
::register_standard_option
('pve-fw-loglevel' => {
104 description
=> "Log level.",
106 enum
=> ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
110 PVE
::JSONSchema
::register_standard_option
('pve-security-group-name', {
111 description
=> "Security Group name.",
113 pattern
=> $security_group_name_pattern,
115 maxLength
=> $max_group_name_length,
118 my $feature_ipset_nomatch = 0;
120 my (undef, undef, $release) = POSIX
::uname
();
121 if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
122 my ($major, $minor) = ($1, $2);
123 $feature_ipset_nomatch = 1 if ($major > 3) ||
124 ($major == 3 && $minor >= 7);
129 my $nodename = PVE
::INotify
::nodename
();
131 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
133 my $default_log_level = 'nolog'; # avoid logs by default
135 my $log_level_hash = {
152 # sport => port[,port[,port]].. or port:port
153 # dport => port[,port[,port]].. or port:port
154 # log => optional, loglevel
155 # logmsg => optional, logmsg - overwrites default
156 # iface_in => incomin interface
157 # iface_out => outgoing interface
158 # match => optional, overwrites generation of match
159 # target => optional, overwrites action
161 # we need to overwrite some macros for ipv6
162 my $pve_ipv6fw_macros = {
164 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'echo-request' },
166 'NeighborDiscovery' => [
167 "IPv6 neighbor solicitation, neighbor and router advertisement",
168 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'router-solicitation' },
169 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'router-advertisement' },
170 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'neighbor-solicitation' },
171 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'neighbor-advertisement' },
175 { action
=> 'PARAM', proto
=> 'udp', dport
=> '546:547', sport
=> '546:547' },
178 { action
=> 'PARAM', proto
=> 'udp', dport
=> '33434:33524' },
179 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'echo-request' },
183 # imported/converted from: /usr/share/shorewall/macro.*
184 my $pve_fw_macros = {
187 { action
=> 'PARAM', proto
=> 'udp', dport
=> '10080' },
188 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10080' },
191 "Auth (identd) traffic",
192 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '113' },
195 "Border Gateway Protocol traffic",
196 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '179' },
199 "BitTorrent traffic for BitTorrent 3.1 and earlier",
200 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6889' },
201 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
204 "BitTorrent traffic for BitTorrent 3.2 and later",
205 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6999' },
206 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
209 "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
210 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6789' },
211 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6800:7300' },
214 "Concurrent Versions System pserver traffic",
215 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2401' },
218 "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
219 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1494' },
220 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1604' },
221 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2598' },
224 "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
225 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3689' },
226 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3689' },
229 "Distributed Checksum Clearinghouse spam filtering mechanism",
230 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6277' },
233 "Forwarded DHCP traffic",
234 { action
=> 'PARAM', proto
=> 'udp', dport
=> '67:68', sport
=> '67:68' },
237 "Domain Name System traffic (upd and tcp)",
238 { action
=> 'PARAM', proto
=> 'udp', dport
=> '53' },
239 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '53' },
242 "Distributed Compiler service",
243 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3632' },
246 "File Transfer Protocol",
247 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '21' },
250 "Finger protocol (RFC 742)",
251 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '79' },
254 "GNUnet secure peer-to-peer networking traffic",
255 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2086' },
256 { action
=> 'PARAM', proto
=> 'udp', dport
=> '2086' },
257 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1080' },
258 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1080' },
261 "Generic Routing Encapsulation tunneling protocol",
262 { action
=> 'PARAM', proto
=> '47' },
265 "Git distributed revision control traffic",
266 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9418' },
269 "OpenPGP HTTP keyserver protocol traffic",
270 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '11371' },
273 "Hypertext Transfer Protocol (WWW)",
274 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
277 "Hypertext Transfer Protocol (WWW) over SSL",
278 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
281 "Internet Cache Protocol V2 (Squid) traffic",
282 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3130' },
285 "AOL Instant Messenger traffic",
286 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5190' },
289 "Internet Message Access Protocol",
290 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '143' },
293 "Internet Message Access Protocol over SSL",
294 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '993' },
297 "IPIP capsulation traffic",
298 { action
=> 'PARAM', proto
=> '94' },
302 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
303 { action
=> 'PARAM', proto
=> '50' },
306 "IPsec authentication (AH) traffic",
307 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
308 { action
=> 'PARAM', proto
=> '51' },
311 "IPsec traffic and Nat-Traversal",
312 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500' },
313 { action
=> 'PARAM', proto
=> 'udp', dport
=> '4500' },
314 { action
=> 'PARAM', proto
=> '50' },
317 "Internet Relay Chat traffic",
318 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6667' },
321 "HP Jetdirect printing",
322 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9100' },
325 "Layer 2 Tunneling Protocol traffic",
326 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1701' },
329 "Lightweight Directory Access Protocol traffic",
330 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '389' },
333 "Secure Lightweight Directory Access Protocol traffic",
334 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '636' },
337 "Microsoft Notification Protocol",
338 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1863' },
341 "Microsoft SQL Server",
342 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1433' },
345 "Mail traffic (SMTP, SMTPS, Submission)",
346 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
347 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
348 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
352 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5353' },
355 "Munin networked resource monitoring traffic",
356 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '4949' },
360 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3306' },
363 "NNTP traffic (Usenet).",
364 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '119' },
367 "Encrypted NNTP traffic (Usenet)",
368 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '563' },
371 "Network Time Protocol (ntpd)",
372 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
375 "OSPF multicast traffic",
376 { action
=> 'PARAM', proto
=> '89' },
380 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1194' },
383 "Symantec PCAnywere (tm)",
384 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5632' },
385 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5631' },
389 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '110' },
392 "Encrypted POP3 traffic",
393 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '995' },
396 "Point-to-Point Tunneling Protocol",
397 { action
=> 'PARAM', proto
=> '47' },
398 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1723' },
402 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
406 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5432' },
409 "Line Printer protocol printing",
410 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '515' },
413 "Microsoft Remote Desktop Protocol traffic",
414 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3389' },
417 "Routing Information Protocol (bidirectional)",
418 { action
=> 'PARAM', proto
=> 'udp', dport
=> '520' },
421 "BIND remote management protocol",
422 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '953' },
425 "Razor Antispam System",
426 { action
=> 'ACCEPT', proto
=> 'tcp', dport
=> '2703' },
429 "Remote time retrieval (rdate)",
430 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
434 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '873' },
437 "SANE network scanning",
438 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6566' },
441 "Microsoft SMB traffic",
442 { action
=> 'PARAM', proto
=> 'udp', dport
=> '135,445' },
443 { action
=> 'PARAM', proto
=> 'udp', dport
=> '137:139' },
444 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
445 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '135,139,445' },
448 "Samba Web Administration Tool",
449 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '901' },
452 "Simple Mail Transfer Protocol",
453 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
456 "Encrypted Simple Mail Transfer Protocol",
457 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
460 "Simple Network Management Protocol",
461 { action
=> 'PARAM', proto
=> 'udp', dport
=> '161:162' },
462 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '161' },
465 "Spam Assassin SPAMD traffic",
466 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '783' },
469 "Secure shell traffic",
470 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '22' },
473 "Subversion server (svnserve)",
474 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3690' },
477 "SixXS IPv6 Deployment and Tunnel Broker",
478 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3874' },
479 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3740' },
480 { action
=> 'PARAM', proto
=> '41' },
481 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5072,8374' },
484 "Squid web proxy traffic",
485 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3128' },
488 "Mail message submission traffic",
489 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
492 "Syslog protocol (RFC 5424) traffic",
493 { action
=> 'PARAM', proto
=> 'udp', dport
=> '514' },
494 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '514' },
497 "Trivial File Transfer Protocol traffic",
498 { action
=> 'PARAM', proto
=> 'udp', dport
=> '69' },
502 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '23' },
506 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '992' },
509 "RFC 868 Time protocol",
510 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
513 "Traceroute (for up to 30 hops) traffic",
514 { action
=> 'PARAM', proto
=> 'udp', dport
=> '33434:33524' },
515 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
518 "VNC traffic for VNC display's 0 - 99",
519 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5900:5999' },
522 "VNC traffic from Vncservers to Vncviewers in listen mode",
523 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5500' },
526 "WWW traffic (HTTP and HTTPS)",
527 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
528 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
531 "Web Cache/Proxy traffic (port 8080)",
532 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '8080' },
536 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10000' },
539 "Whois (nicname, RFC 3912) traffic",
540 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '43' },
544 my $pve_fw_parsed_macros;
545 my $pve_fw_macro_descr;
546 my $pve_fw_macro_ipversion = {};
547 my $pve_fw_preferred_macro_names = {};
549 my $FWACCEPTMARK_ON = "0x80000000/0x80000000";
550 my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
552 my $pve_std_chains = {};
553 my $pve_std_chains_conf = {};
554 $pve_std_chains_conf->{4} = {
555 'PVEFW-SET-ACCEPT-MARK' => [
556 { target
=> "-j MARK --set-mark $FWACCEPTMARK_ON" },
558 'PVEFW-DropBroadcast' => [
559 # same as shorewall 'Broadcast'
560 # simply DROP BROADCAST/MULTICAST/ANYCAST
561 # we can use this to reduce logging
562 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
563 { action
=> 'DROP', dsttype
=> 'MULTICAST' },
564 { action
=> 'DROP', dsttype
=> 'ANYCAST' },
565 { action
=> 'DROP', dest
=> '224.0.0.0/4' },
568 # same as shorewall 'reject'
569 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
570 { action
=> 'DROP', source
=> '224.0.0.0/4' },
571 { action
=> 'DROP', proto
=> 'icmp' },
572 { match
=> '-p tcp', target
=> '-j REJECT --reject-with tcp-reset' },
573 { match
=> '-p udp', target
=> '-j REJECT --reject-with icmp-port-unreachable' },
574 { match
=> '-p icmp', target
=> '-j REJECT --reject-with icmp-host-unreachable' },
575 { target
=> '-j REJECT --reject-with icmp-host-prohibited' },
578 # same as shorewall 'Drop', which is equal to DROP,
579 # but REJECT/DROP some packages to reduce logging,
580 # and ACCEPT critical ICMP types
581 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
582 # we are not interested in BROADCAST/MULTICAST/ANYCAST
583 { action
=> 'PVEFW-DropBroadcast' },
584 # ACCEPT critical ICMP types
585 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
586 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
587 # Drop packets with INVALID state
588 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
589 # Drop Microsoft SMB noise
590 { action
=> 'DROP', proto
=> 'udp', dport
=> '135,445' },
591 { action
=> 'DROP', proto
=> 'udp', dport
=> '137:139' },
592 { action
=> 'DROP', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
593 { action
=> 'DROP', proto
=> 'tcp', dport
=> '135,139,445' },
594 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
595 # Drop new/NotSyn traffic so that it doesn't get logged
596 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
598 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
601 # same as shorewall 'Reject', which is equal to Reject,
602 # but REJECT/DROP some packages to reduce logging,
603 # and ACCEPT critical ICMP types
604 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
605 # we are not interested in BROADCAST/MULTICAST/ANYCAST
606 { action
=> 'PVEFW-DropBroadcast' },
607 # ACCEPT critical ICMP types
608 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
609 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
610 # Drop packets with INVALID state
611 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
612 # Drop Microsoft SMB noise
613 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '135,445' },
614 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '137:139'},
615 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
616 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '135,139,445' },
617 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
618 # Drop new/NotSyn traffic so that it doesn't get logged
619 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
621 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
623 'PVEFW-tcpflags' => [
624 # same as shorewall tcpflags action.
625 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
626 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target
=> '-g PVEFW-logflags' },
627 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target
=> '-g PVEFW-logflags' },
628 { match
=> '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target
=> '-g PVEFW-logflags' },
629 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target
=> '-g PVEFW-logflags' },
630 { match
=> '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target
=> '-g PVEFW-logflags' },
633 # same as shorewall smurfs action
634 # Filter packets for smurfs (packets with a broadcast address as the source).
635 { match
=> '-s 0.0.0.0/32', target
=> '-j RETURN' }, # allow DHCP
636 { match
=> '-m addrtype --src-type BROADCAST', target
=> '-g PVEFW-smurflog' },
637 { match
=> '-s 224.0.0.0/4', target
=> '-g PVEFW-smurflog' },
639 'PVEFW-smurflog' => [
640 { action
=> 'DROP', logmsg
=> 'DROP: ' },
642 'PVEFW-logflags' => [
643 { action
=> 'DROP', logmsg
=> 'DROP: ' },
647 $pve_std_chains_conf->{6} = {
648 'PVEFW-SET-ACCEPT-MARK' => [
649 { target
=> "-j MARK --set-mark $FWACCEPTMARK_ON" },
651 'PVEFW-DropBroadcast' => [
652 # same as shorewall 'Broadcast'
653 # simply DROP BROADCAST/MULTICAST/ANYCAST
654 # we can use this to reduce logging
655 #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
656 # ipv6 addrtype does not work with kernel 2.6.32
657 #{ action => 'DROP', dsttype => 'MULTICAST' },
658 #{ action => 'DROP', dsttype => 'ANYCAST' },
659 { action
=> 'DROP', dest
=> 'ff00::/8' },
660 #{ action => 'DROP', dest => '224.0.0.0/4' },
663 # same as shorewall 'reject'
664 #{ action => 'DROP', dsttype => 'BROADCAST' },
665 #{ action => 'DROP', source => '224.0.0.0/4' },
666 { action
=> 'DROP', proto
=> 'icmpv6' },
667 { match
=> '-p tcp', target
=> '-j REJECT --reject-with tcp-reset' },
668 #"-p udp -j REJECT --reject-with icmp-port-unreachable",
669 #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
670 #"-j REJECT --reject-with icmp-host-prohibited",
673 # same as shorewall 'Drop', which is equal to DROP,
674 # but REJECT/DROP some packages to reduce logging,
675 # and ACCEPT critical ICMP types
676 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
677 # we are not interested in BROADCAST/MULTICAST/ANYCAST
678 { action
=> 'PVEFW-DropBroadcast' },
679 # ACCEPT critical ICMP types
680 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'destination-unreachable' },
681 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'time-exceeded' },
682 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'packet-too-big' },
683 # Drop packets with INVALID state
684 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
685 # Drop Microsoft SMB noise
686 { action
=> 'DROP', proto
=> 'udp', dport
=> '135,445' },
687 { action
=> 'DROP', proto
=> 'udp', dport
=> '137:139'},
688 { action
=> 'DROP', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
689 { action
=> 'DROP', proto
=> 'tcp', dport
=> '135,139,445' },
690 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
691 # Drop new/NotSyn traffic so that it doesn't get logged
692 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
694 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
697 # same as shorewall 'Reject', which is equal to Reject,
698 # but REJECT/DROP some packages to reduce logging,
699 # and ACCEPT critical ICMP types
700 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
701 # we are not interested in BROADCAST/MULTICAST/ANYCAST
702 { action
=> 'PVEFW-DropBroadcast' },
703 # ACCEPT critical ICMP types
704 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'destination-unreachable' },
705 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'time-exceeded' },
706 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'packet-too-big' },
707 # Drop packets with INVALID state
708 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
709 # Drop Microsoft SMB noise
710 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '135,445' },
711 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '137:139' },
712 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
713 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '135,139,445' },
714 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
715 # Drop new/NotSyn traffic so that it doesn't get logged
716 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
718 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
720 'PVEFW-tcpflags' => [
721 # same as shorewall tcpflags action.
722 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
723 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target
=> '-g PVEFW-logflags' },
724 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target
=> '-g PVEFW-logflags' },
725 { match
=> '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target
=> '-g PVEFW-logflags' },
726 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target
=> '-g PVEFW-logflags' },
727 { match
=> '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target
=> '-g PVEFW-logflags' },
729 'PVEFW-logflags' => [
730 { action
=> 'DROP', logmsg
=> 'DROP: ' },
734 # iptables -p icmp -h
735 my $icmp_type_names = {
738 'destination-unreachable' => 1,
739 'network-unreachable' => 1,
740 'host-unreachable' => 1,
741 'protocol-unreachable' => 1,
742 'port-unreachable' => 1,
743 'fragmentation-needed' => 1,
744 'source-route-failed' => 1,
745 'network-unknown' => 1,
747 'network-prohibited' => 1,
748 'host-prohibited' => 1,
749 'TOS-network-unreachable' => 1,
750 'TOS-host-unreachable' => 1,
751 'communication-prohibited' => 1,
752 'host-precedence-violation' => 1,
753 'precedence-cutoff' => 1,
754 'source-quench' => 1,
756 'network-redirect' => 1,
757 'host-redirect' => 1,
758 'TOS-network-redirect' => 1,
759 'TOS-host-redirect' => 1,
761 'router-advertisement' => 1,
762 'router-solicitation' => 1,
763 'time-exceeded' => 1,
764 'ttl-zero-during-transit' => 1,
765 'ttl-zero-during-reassembly' => 1,
766 'parameter-problem' => 1,
767 'ip-header-bad' => 1,
768 'required-option-missing' => 1,
769 'timestamp-request' => 1,
770 'timestamp-reply' => 1,
771 'address-mask-request' => 1,
772 'address-mask-reply' => 1,
775 # ip6tables -p icmpv6 -h
777 my $icmpv6_type_names = {
779 'destination-unreachable' => 1,
781 'communication-prohibited' => 1,
782 'address-unreachable' => 1,
783 'port-unreachable' => 1,
784 'packet-too-big' => 1,
785 'time-exceeded' => 1,
786 'ttl-zero-during-transit' => 1,
787 'ttl-zero-during-reassembly' => 1,
788 'parameter-problem' => 1,
790 'unknown-header-type' => 1,
791 'unknown-option' => 1,
794 'router-solicitation' => 1,
795 'router-advertisement' => 1,
796 'neighbor-solicitation' => 1,
797 'neighbour-solicitation' => 1,
798 'neighbor-advertisement' => 1,
799 'neighbour-advertisement' => 1,
803 sub init_firewall_macros
{
805 $pve_fw_parsed_macros = {};
808 my ($k, $macro) = @_;
809 my $lc_name = lc($k);
810 $pve_fw_macro_ipversion->{$k} = 0;
811 while (!ref($macro->[0])) {
812 my $desc = shift @$macro;
813 if ($desc eq 'ipv4only') {
814 $pve_fw_macro_ipversion->{$k} = 4;
815 } elsif ($desc eq 'ipv6only') {
816 $pve_fw_macro_ipversion->{$k} = 6;
818 $pve_fw_macro_descr->{$k} = $desc;
821 $pve_fw_preferred_macro_names->{$lc_name} = $k;
822 $pve_fw_parsed_macros->{$k} = $macro;
825 foreach my $k (keys %$pve_fw_macros) {
826 &$parse($k, $pve_fw_macros->{$k});
829 foreach my $k (keys %$pve_ipv6fw_macros) {
830 next if $pve_fw_parsed_macros->{$k};
831 &$parse($k, $pve_ipv6fw_macros->{$k});
832 $pve_fw_macro_ipversion->{$k} = 6;
836 init_firewall_macros
();
839 return wantarray ?
($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
844 sub get_etc_services
{
846 return $etc_services if $etc_services;
848 my $filename = "/etc/services";
850 my $fh = IO
::File-
>new($filename, O_RDONLY
);
852 warn "unable to read '$filename' - $!\n";
858 while (my $line = <$fh>) {
860 next if $line =~m/^#/;
861 next if ($line =~m/^\s*$/);
863 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp|sctp).*$!) {
864 $services->{byid
}->{$2}->{name
} = $1;
865 $services->{byid
}->{$2}->{port
} = $2;
866 $services->{byid
}->{$2}->{$3} = 1;
867 $services->{byname
}->{$1} = $services->{byid
}->{$2};
873 $etc_services = $services;
876 return $etc_services;
879 sub parse_protocol_file
{
882 my $fh = IO
::File-
>new($filename, O_RDONLY
);
884 warn "unable to read '$filename' - $!\n";
890 while (my $line = <$fh>) {
892 next if $line =~m/^#/;
893 next if ($line =~m/^\s*$/);
895 if ($line =~ m!^(\S+)\s+(\d+)(?:\s+.*)?$!) {
896 $protocols->{byid
}->{$2}->{name
} = $1;
897 $protocols->{byname
}->{$1} = $protocols->{byid
}->{$2};
908 sub get_etc_protocols
{
909 return $etc_protocols if $etc_protocols;
911 my $protocols = parse_protocol_file
('/etc/protocols');
913 # add special case for ICMP v6
914 $protocols->{byid
}->{icmpv6
}->{name
} = "icmpv6";
915 $protocols->{byname
}->{icmpv6
} = $protocols->{byid
}->{icmpv6
};
917 $etc_protocols = $protocols;
919 return $etc_protocols;
924 sub get_etc_ethertypes
{
925 $etc_ethertypes = parse_protocol_file
('/etc/ethertypes')
927 return $etc_ethertypes;
933 my ($new_value) = @_;
935 $__local_network = $new_value if defined($new_value);
937 return $__local_network if defined($__local_network);
940 my $nodename = PVE
::INotify
::nodename
();
942 my $ip = PVE
::Cluster
::remote_node_ip
($nodename);
944 my $testip = Net
::IP-
>new($ip);
946 my $isv6 = $testip->version == 6;
947 my $routes = $isv6 ? PVE
::ProcFSTools
::read_proc_net_ipv6_route
()
948 : PVE
::ProcFSTools
::read_proc_net_route
();
949 foreach my $entry (@$routes) {
952 $mask = $entry->{prefix
};
953 next if !$mask; # skip the default route...
955 $mask = $PVE::Network
::ipv4_mask_hash_localnet-
>{$entry->{mask
}};
956 next if !defined($mask);
958 my $cidr = "$entry->{dest}/$mask";
959 my $testnet = Net
::IP-
>new($cidr);
960 my $overlap = $testnet->overlaps($testip);
961 if ($overlap == $Net::IP
::IP_B_IN_A_OVERLAP
||
962 $overlap == $Net::IP
::IP_IDENTICAL
)
964 $__local_network = $cidr;
971 return $__local_network;
974 # ipset names are limited to 31 characters,
975 # and we use '-v4' or '-v6' to indicate IP versions,
976 # and we use '_swap' suffix for atomic update,
977 # for example PVEFW-${VMID}-${ipset_name}_swap
979 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
981 sub compute_ipset_chain_name
{
982 my ($vmid, $ipset_name, $ipversion) = @_;
984 $vmid = 0 if !defined($vmid);
986 my $id = "$vmid-${ipset_name}-v$ipversion";
988 if (length($id) > $max_iptables_ipset_name_length) {
989 $id = PVE
::Tools
::fnv31a_hex
($id);
995 sub compute_ipfilter_ipset_name
{
998 return "ipfilter-$iface";
1001 sub parse_address_list
{
1004 if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
1005 die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
1009 if ($str =~ m/^${ip_alias_pattern}$/) {
1010 die "alias name too long\n" if length($str) > $max_alias_name_length;
1018 my @elements = split(/,/, $str);
1019 die "extraneous commas in list\n" if $str ne join(',', @elements);
1020 foreach my $elem (@elements) {
1022 my $ip = Net
::IP-
>new($elem);
1024 my $err = Net
::IP
::Error
();
1025 die "invalid IP address: $err\n";
1027 $iprange = 1 if $elem =~ m/-/;
1029 my $new_ipversion = Net
::IP
::ip_is_ipv6
($ip->ip()) ?
6 : 4;
1031 die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
1032 if $ipversion && ($new_ipversion != $ipversion);
1034 $ipversion = $new_ipversion;
1037 die "you can't use a range in a list\n" if $iprange && $count > 1;
1042 sub parse_port_name_number_or_range
{
1043 my ($str, $dport) = @_;
1045 my $services = PVE
::Firewall
::get_etc_services
();
1049 my @elements = split(/,/, $str);
1050 die "extraneous commas in list\n" if $str ne join(',', @elements);
1051 foreach my $item (@elements) {
1052 if ($item =~ m/^(\d+):(\d+)$/) {
1054 my ($port1, $port2) = ($1, $2);
1055 die "invalid port '$port1'\n" if $port1 > 65535;
1056 die "invalid port '$port2'\n" if $port2 > 65535;
1057 } elsif ($item =~ m/^(\d+)$/) {
1060 die "invalid port '$port'\n" if $port > 65535;
1062 if ($dport && $icmp_type_names->{$item}) {
1064 } elsif ($dport && $icmpv6_type_names->{$item}) {
1067 die "invalid port '$item'\n" if !$services->{byname
}->{$item};
1072 die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 0;
1074 # I really don't like to use the word number here, but it's the only thing
1075 # that makes sense in a literal way. The range 1:100 counts as 2, not as
1076 # one and not as 100...
1077 die "too many entries in port list (> 15 numbers)\n"
1080 return (scalar(@elements) > 1);
1083 PVE
::JSONSchema
::register_format
('pve-fw-sport-spec', \
&pve_fw_verify_sport_spec
);
1084 sub pve_fw_verify_sport_spec
{
1087 parse_port_name_number_or_range
($portstr, 0);
1092 PVE
::JSONSchema
::register_format
('pve-fw-dport-spec', \
&pve_fw_verify_dport_spec
);
1093 sub pve_fw_verify_dport_spec
{
1096 parse_port_name_number_or_range
($portstr, 1);
1101 PVE
::JSONSchema
::register_format
('pve-fw-addr-spec', \
&pve_fw_verify_addr_spec
);
1102 sub pve_fw_verify_addr_spec
{
1105 parse_address_list
($list);
1110 PVE
::JSONSchema
::register_format
('pve-fw-protocol-spec', \
&pve_fw_verify_protocol_spec
);
1111 sub pve_fw_verify_protocol_spec
{
1114 my $protocols = get_etc_protocols
();
1116 die "unknown protocol '$proto'\n" if $proto &&
1117 !(defined($protocols->{byname
}->{$proto}) ||
1118 defined($protocols->{byid
}->{$proto}));
1124 # helper function for API
1126 sub copy_opject_with_digest
{
1129 my $sha = Digest
::SHA-
>new('sha1');
1132 foreach my $k (sort keys %$object) {
1133 my $v = $object->{$k};
1134 next if !defined($v);
1136 $sha->add($k, ':', $v, "\n");
1139 my $digest = $sha->hexdigest;
1141 $res->{digest
} = $digest;
1143 return wantarray ?
($res, $digest) : $res;
1146 sub copy_list_with_digest
{
1149 my $sha = Digest
::SHA-
>new('sha1');
1152 foreach my $entry (@$list) {
1154 foreach my $k (sort keys %$entry) {
1155 my $v = $entry->{$k};
1156 next if !defined($v);
1158 # Note: digest ignores refs ($rule->{errors})
1159 # since Digest::SHA expects a series of bytes,
1160 # we have to encode the value here to prevent errors when
1161 # using utf8 characters (eg. in comments)
1162 $sha->add($k, ':', encode_utf8
($v), "\n") if !ref($v); ;
1167 my $digest = $sha->hexdigest;
1169 foreach my $entry (@$res) {
1170 $entry->{digest
} = $digest;
1173 return wantarray ?
($res, $digest) : $res;
1176 our $cluster_option_properties = {
1178 description
=> "Enable or disable the firewall cluster wide.",
1184 description
=> "Input policy.",
1187 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1190 description
=> "Output policy.",
1193 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1197 our $host_option_properties = {
1199 description
=> "Enable host firewall rules.",
1203 log_level_in
=> get_standard_option
('pve-fw-loglevel', {
1204 description
=> "Log level for incoming traffic." }),
1205 log_level_out
=> get_standard_option
('pve-fw-loglevel', {
1206 description
=> "Log level for outgoing traffic." }),
1207 tcp_flags_log_level
=> get_standard_option
('pve-fw-loglevel', {
1208 description
=> "Log level for illegal tcp flags filter." }),
1209 smurf_log_level
=> get_standard_option
('pve-fw-loglevel', {
1210 description
=> "Log level for SMURFS filter." }),
1212 description
=> "Enable SMURFS filter.",
1217 description
=> "Filter illegal combinations of TCP flags.",
1221 nf_conntrack_max
=> {
1222 description
=> "Maximum number of tracked connections.",
1227 nf_conntrack_tcp_timeout_established
=> {
1228 description
=> "Conntrack established timeout.",
1234 description
=> "Enable NDP.",
1240 our $vm_option_properties = {
1242 description
=> "Enable/disable firewall rules.",
1247 description
=> "Enable/disable MAC address filter.",
1252 description
=> "Enable DHCP.",
1257 description
=> "Enable NDP.",
1262 description
=> "Allow sending Router Advertisement.",
1267 description
=> "Enable default IP filters. " .
1268 "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1269 "for every interface. Such ipsets implicitly contain sane default " .
1270 "restrictions such as restricting IPv6 link local addresses to " .
1271 "the one derived from the interface's MAC address. For containers " .
1272 "the configured IP addresses will be implicitly added.",
1277 description
=> "Input policy.",
1280 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1283 description
=> "Output policy.",
1286 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1288 log_level_in
=> get_standard_option
('pve-fw-loglevel', {
1289 description
=> "Log level for incoming traffic." }),
1290 log_level_out
=> get_standard_option
('pve-fw-loglevel', {
1291 description
=> "Log level for outgoing traffic." }),
1296 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.";
1298 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.";
1300 my $rule_properties = {
1302 description
=> "Update rule at position <pos>.",
1307 digest
=> get_standard_option
('pve-config-digest'),
1309 description
=> "Rule type.",
1312 enum
=> ['in', 'out', 'group'],
1315 description
=> "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1318 pattern
=> $security_group_name_pattern,
1323 description
=> "Use predefined standard macro.",
1328 iface
=> get_standard_option
('pve-iface', {
1329 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.",
1333 description
=> "Restrict packet source address. $addr_list_descr",
1334 type
=> 'string', format
=> 'pve-fw-addr-spec',
1338 description
=> "Restrict packet destination address. $addr_list_descr",
1339 type
=> 'string', format
=> 'pve-fw-addr-spec',
1343 description
=> "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1344 type
=> 'string', format
=> 'pve-fw-protocol-spec',
1348 description
=> "Flag to enable/disable a rule.",
1354 description
=> "Restrict TCP/UDP source port. $port_descr",
1355 type
=> 'string', format
=> 'pve-fw-sport-spec',
1359 description
=> "Restrict TCP/UDP destination port. $port_descr",
1360 type
=> 'string', format
=> 'pve-fw-dport-spec',
1364 description
=> "Descriptive comment.",
1370 sub add_rule_properties
{
1371 my ($properties) = @_;
1373 foreach my $k (keys %$rule_properties) {
1374 my $h = $rule_properties->{$k};
1375 # copy data, so that we can modify later without side effects
1376 foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1382 sub delete_rule_properties
{
1383 my ($rule, $delete_str) = @_;
1385 foreach my $opt (PVE
::Tools
::split_list
($delete_str)) {
1386 raise_param_exc
({ 'delete' => "no such property ('$opt')"})
1387 if !defined($rule_properties->{$opt});
1388 raise_param_exc
({ 'delete' => "unable to delete required property '$opt'"})
1389 if $opt eq 'type' || $opt eq 'action';
1390 delete $rule->{$opt};
1396 my $apply_macro = sub {
1397 my ($macro_name, $param, $verify, $ipversion) = @_;
1399 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1400 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1402 if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1403 $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1406 # skip macros which are specific to another ipversion
1407 if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1408 return if $ipversion != $required;
1413 foreach my $templ (@$macro_rules) {
1415 my $param_used = {};
1416 foreach my $k (keys %$templ) {
1417 my $v = $templ->{$k};
1418 if ($v eq 'PARAM') {
1420 $param_used->{$k} = 1;
1421 } elsif ($v eq 'DEST') {
1422 $v = $param->{dest
};
1423 $param_used->{dest
} = 1;
1424 } elsif ($v eq 'SOURCE') {
1425 $v = $param->{source
};
1426 $param_used->{source
} = 1;
1430 my $msg = "missing parameter '$k' in macro '$macro_name'";
1431 raise_param_exc
({ macro => $msg }) if $verify;
1436 foreach my $k (keys %$param) {
1437 next if $k eq 'macro';
1438 next if !defined($param->{$k});
1439 next if $param_used->{$k};
1440 if (defined($rule->{$k})) {
1441 if ($rule->{$k} ne $param->{$k}) {
1442 my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1443 raise_param_exc
({ $k => $msg }) if $verify;
1447 $rule->{$k} = $param->{$k};
1450 push @$rules, $rule;
1456 my $rule_env_iface_lookup = {
1465 my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1467 my $allow_groups = $rule_env eq 'group' ?
0 : 1;
1469 my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1470 die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1472 my $errors = $rule->{errors
} || {};
1474 my $error_count = 0;
1476 my $add_error = sub {
1477 my ($param, $msg) = @_;
1479 raise_param_exc
({ $param => $msg }) if !$noerr;
1481 $errors->{$param} = $msg if !$errors->{$param};
1485 my $set_ip_version = sub {
1488 die "detected mixed ipv4/ipv6 adresses in rule\n"
1489 if $ipversion && ($vers != $ipversion);
1494 my $check_ipset_or_alias_property = sub {
1495 my ($name, $expected_ipversion) = @_;
1497 if (my $value = $rule->{$name}) {
1498 if ($value =~ m/^\+/) {
1499 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1500 &$add_error($name, "no such ipset '$1'")
1501 if !($cluster_conf->{ipset
}->{$1} || ($fw_conf && $fw_conf->{ipset
}->{$1}));
1504 &$add_error($name, "invalid ipset name '$value'");
1506 } elsif ($value =~ m/^${ip_alias_pattern}$/){
1507 my $alias = lc($value);
1508 &$add_error($name, "no such alias '$value'")
1509 if !($cluster_conf->{aliases
}->{$alias} || ($fw_conf && $fw_conf->{aliases
}->{$alias}));
1510 my $e = $fw_conf ?
$fw_conf->{aliases
}->{$alias} : undef;
1511 $e = $cluster_conf->{aliases
}->{$alias} if !$e && $cluster_conf;
1513 &$set_ip_version($e->{ipversion
});
1518 my $type = $rule->{type
};
1519 my $action = $rule->{action
};
1521 &$add_error('type', "missing property") if !$type;
1522 &$add_error('action', "missing property") if !$action;
1525 if ($type eq 'in' || $type eq 'out') {
1526 &$add_error('action', "unknown action '$action'")
1527 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1528 } elsif ($type eq 'group') {
1529 &$add_error('type', "security groups not allowed")
1531 &$add_error('action', "invalid characters in security group name")
1532 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1534 &$add_error('type', "unknown rule type '$type'");
1538 if ($rule->{iface
}) {
1539 &$add_error('type', "parameter -i not allowed for this rule type")
1541 eval { PVE
::JSONSchema
::pve_verify_iface
($rule->{iface
}); };
1542 &$add_error('iface', $@) if $@;
1543 if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1544 &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1545 if $rule->{iface
} !~ m/^net(\d+)$/;
1549 if ($rule->{macro}) {
1550 if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1551 $rule->{macro} = $preferred_name;
1553 &$add_error('macro', "unknown macro '$rule->{macro}'");
1557 if ($rule->{proto
}) {
1558 eval { pve_fw_verify_protocol_spec
($rule->{proto
}); };
1559 &$add_error('proto', $@) if $@;
1560 &$set_ip_version(4) if $rule->{proto
} eq 'icmp';
1561 &$set_ip_version(6) if $rule->{proto
} eq 'icmpv6';
1564 if ($rule->{dport
}) {
1565 eval { parse_port_name_number_or_range
($rule->{dport
}, 1); };
1566 &$add_error('dport', $@) if $@;
1567 my $proto = $rule->{proto
};
1568 &$add_error('proto', "missing property - 'dport' requires this property")
1570 &$add_error('dport', "protocol '$proto' does not support ports")
1571 if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1572 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1575 if ($rule->{sport
}) {
1576 eval { parse_port_name_number_or_range
($rule->{sport
}, 0); };
1577 &$add_error('sport', $@) if $@;
1578 my $proto = $rule->{proto
};
1579 &$add_error('proto', "missing property - 'sport' requires this property")
1581 &$add_error('sport', "protocol '$proto' does not support ports")
1582 if !$PROTOCOLS_WITH_PORTS->{$proto};
1585 if ($rule->{source
}) {
1587 my $source_ipversion = parse_address_list
($rule->{source
});
1588 &$set_ip_version($source_ipversion);
1590 &$add_error('source', $@) if $@;
1591 &$check_ipset_or_alias_property('source', $ipversion);
1594 if ($rule->{dest
}) {
1596 my $dest_ipversion = parse_address_list
($rule->{dest
});
1597 &$set_ip_version($dest_ipversion);
1599 &$add_error('dest', $@) if $@;
1600 &$check_ipset_or_alias_property('dest', $ipversion);
1603 $rule->{ipversion
} = $ipversion if $ipversion;
1605 if ($rule->{macro} && !$error_count) {
1606 eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1608 if (ref($err) eq "PVE::Exception" && $err->{errors
}) {
1609 my $eh = $err->{errors
};
1610 foreach my $p (keys %$eh) {
1611 &$add_error($p, $eh->{$p});
1614 &$add_error('macro', "$err");
1619 $rule->{errors
} = $errors if $error_count;
1624 sub copy_rule_data
{
1625 my ($rule, $param) = @_;
1627 foreach my $k (keys %$rule_properties) {
1628 if (defined(my $v = $param->{$k})) {
1629 if ($v eq '' || $v eq '-') {
1640 sub rules_modify_permissions
{
1641 my ($rule_env) = @_;
1643 if ($rule_env eq 'host') {
1645 check
=> ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1647 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1649 check
=> ['perm', '/', [ 'Sys.Modify' ]],
1651 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1653 check
=> ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1660 sub rules_audit_permissions
{
1661 my ($rule_env) = @_;
1663 if ($rule_env eq 'host') {
1665 check
=> ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1667 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1669 check
=> ['perm', '/', [ 'Sys.Audit' ]],
1671 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1673 check
=> ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1681 my $bridge_firewall_enabled = 0;
1683 sub enable_bridge_firewall
{
1685 return if $bridge_firewall_enabled; # only once
1687 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1688 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1690 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1691 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/ipv4/tcp_syncookies", "1");
1693 $bridge_firewall_enabled = 1;
1696 sub iptables_restore_cmdlist
{
1699 run_command
("/sbin/iptables-restore -n", input
=> $cmdlist, errmsg
=> "iptables_restore_cmdlist");
1702 sub ip6tables_restore_cmdlist
{
1705 run_command
("/sbin/ip6tables-restore -n", input
=> $cmdlist, errmsg
=> "iptables_restore_cmdlist");
1708 sub ipset_restore_cmdlist
{
1711 run_command
("/sbin/ipset restore", input
=> $cmdlist, errmsg
=> "ipset_restore_cmdlist");
1714 sub ebtables_restore_cmdlist
{
1717 run_command
("/sbin/ebtables-restore", input
=> $cmdlist, errmsg
=> "ebtables_restore_cmdlist");
1720 sub iptables_get_chains
{
1721 my ($iptablescmd) = @_;
1723 $iptablescmd = "iptables" if !$iptablescmd;
1727 # check what chains we want to track
1728 my $is_pvefw_chain = sub {
1731 return 1 if $name =~ m/^PVEFW-\S+$/;
1733 return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1735 return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1737 return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1738 return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1750 return if $line =~ m/^#/;
1751 return if $line =~ m/^\s*$/;
1753 if ($line =~ m/^\*(\S+)$/) {
1758 return if $table ne 'filter';
1760 if ($line =~ m/^:(\S+)\s/) {
1762 return if !&$is_pvefw_chain($chain);
1763 $res->{$chain} = "unknown";
1764 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1765 my ($chain, $sig) = ($1, $2);
1766 return if !&$is_pvefw_chain($chain);
1767 $res->{$chain} = $sig;
1768 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1771 # simply ignore the rest
1776 run_command
("/sbin/$iptablescmd-save", outfunc
=> $parser);
1778 return wantarray ?
($res, $hooks) : $res;
1781 sub iptables_chain_digest
{
1783 my $digest = Digest
::SHA-
>new('sha1');
1784 foreach my $rule (@$rules) { # order is important
1785 $digest->add($rule);
1787 return $digest->b64digest;
1790 sub ipset_chain_digest
{
1793 my $digest = Digest
::SHA-
>new('sha1');
1794 foreach my $rule (sort @$rules) { # note: sorted
1795 $digest->add($rule);
1797 return $digest->b64digest;
1800 sub ipset_get_chains
{
1808 return if $line =~ m/^#/;
1809 return if $line =~ m/^\s*$/;
1810 if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1812 $line =~ s/\s+$//; # delete trailing white space
1813 push @{$chains->{$chain}}, $line;
1815 # simply ignore the rest
1820 run_command
("/sbin/ipset save", outfunc
=> $parser);
1822 # compute digest for each chain
1823 foreach my $chain (keys %$chains) {
1824 $res->{$chain} = ipset_chain_digest
($chains->{$chain});
1830 sub ebtables_get_chains
{
1837 return if $line =~ m/^#/;
1838 return if $line =~ m/^\s*$/;
1839 if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1842 push @{$chains->{$chain}}, $line;
1843 } elsif ($line =~ m/^(?:\S+)\s(tap\d+i\d+-(:?IN|OUT))\s(?:\S+).*/) {
1846 push @{$chains->{$chain}}, $line;
1847 } elsif ($line =~ m/^(?:\S+)\s(veth\d+i\d+-(:?IN|OUT))\s(?:\S+).*/) {
1850 push @{$chains->{$chain}}, $line;
1852 # simply ignore the rest
1857 run_command
("/sbin/ebtables-save", outfunc
=> $parser);
1859 # compute digest for each chain
1860 foreach my $chain (keys %$chains) {
1861 $res->{$chain} = iptables_chain_digest
($chains->{$chain});
1866 # substitude action of rule according to action hash
1867 sub rule_substitude_action
{
1868 my ($rule, $actions) = @_;
1870 if (my $action = $rule->{action
}) {
1871 $rule->{action
} = $actions->{$action} if defined($actions->{$action});
1875 # generate a src or dst match
1876 # $dir(ection) is either d or s
1877 sub ipt_gen_src_or_dst_match
{
1878 my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
1883 } elsif ($dir eq 'd') {
1886 die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
1890 if ($adr =~ m/^\+/) {
1891 if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
1894 if ($fw_conf && $fw_conf->{ipset
}->{$name}) {
1895 $ipset_chain = compute_ipset_chain_name
($fw_conf->{vmid
}, $name, $ipversion);
1896 } elsif ($cluster_conf && $cluster_conf->{ipset
}->{$name}) {
1897 $ipset_chain = compute_ipset_chain_name
(0, $name, $ipversion);
1899 die "no such ipset '$name'\n";
1901 $match = "-m set --match-set ${ipset_chain} ${srcdst}";
1903 die "invalid security group name '$adr'\n";
1905 } elsif ($adr =~ m/^${ip_alias_pattern}$/){
1906 my $alias = lc($adr);
1907 my $e = $fw_conf ?
$fw_conf->{aliases
}->{$alias} : undef;
1908 $e = $cluster_conf->{aliases
}->{$alias} if !$e && $cluster_conf;
1909 die "no such alias '$adr'\n" if !$e;
1910 $match = "-${dir} $e->{cidr}";
1911 } elsif ($adr =~ m/\-/){
1912 $match = "-m iprange --${srcdst}-range $adr";
1914 $match = "-${dir} $adr";
1920 # convert a %rule to an array of iptables commands
1921 sub ipt_rule_to_cmds
{
1922 my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
1924 die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
1928 if (defined $rule->{match
}) {
1929 push @match, $rule->{match
};
1931 push @match, "-i $rule->{iface_in}" if $rule->{iface_in
};
1932 push @match, "-o $rule->{iface_out}" if $rule->{iface_out
};
1934 if ($rule->{source
}) {
1935 push @match, ipt_gen_src_or_dst_match
($rule->{source
}, 's', $ipversion, $cluster_conf, $fw_conf);
1937 if ($rule->{dest
}) {
1938 push @match, ipt_gen_src_or_dst_match
($rule->{dest
}, 'd', $ipversion, $cluster_conf, $fw_conf);
1941 if (my $proto = $rule->{proto
}) {
1942 push @match, "-p $proto";
1944 my $multidport = defined($rule->{dport
}) && parse_port_name_number_or_range
($rule->{dport
}, 1);
1945 my $multisport = defined($rule->{sport
}) && parse_port_name_number_or_range
($rule->{sport
}, 0);
1947 my $add_dport = sub {
1948 return if !$rule->{dport
};
1950 if ($proto eq 'icmp') {
1951 # Note: we use dport to store --icmp-type
1952 die "unknown icmp-type '$rule->{dport}'\n"
1953 if $rule->{dport
} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport
}});
1954 push @match, "-m icmp --icmp-type $rule->{dport}";
1955 } elsif ($proto eq 'icmpv6') {
1956 # Note: we use dport to store --icmpv6-type
1957 die "unknown icmpv6-type '$rule->{dport}'\n"
1958 if $rule->{dport
} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport
}});
1959 push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
1960 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
1961 die "protocol $proto does not have ports\n";
1962 } elsif ($multidport) {
1963 push @match, "--match multiport", "--dports $rule->{dport}";
1965 push @match, "--dport $rule->{dport}";
1969 my $add_sport = sub {
1970 return if !$rule->{sport
};
1972 die "protocol $proto does not have ports\n"
1973 if !$PROTOCOLS_WITH_PORTS->{$proto};
1975 push @match, "--match multiport", "--sports $rule->{sport}";
1977 push @match, "--sport $rule->{sport}";
1981 # order matters - single port before multiport!
1982 $add_dport->() if $multisport;
1984 $add_dport->() if !$multisport;
1985 } elsif ($rule->{dport
} || $rule->{sport
}) {
1986 die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport
};
1987 die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport
};
1990 push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype
};
1992 my $matchstr = scalar(@match) ?
join(' ', @match) : "";
1995 if (defined $rule->{target
}) {
1996 $targetstr = $rule->{target
};
1998 my $action = (defined $rule->{action
}) ?
$rule->{action
} : "";
1999 my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
2000 $targetstr = ($goto) ?
"-g $action" : "-j $action";
2004 if (defined $rule->{log} && $rule->{log}) {
2005 my $logaction = get_log_rule_base
($chain, $vmid, $rule->{logmsg
}, $rule->{log});
2006 push @iptcmds, "-A $chain $matchstr $logaction";
2008 push @iptcmds, "-A $chain $matchstr $targetstr";
2012 sub ruleset_generate_rule
{
2013 my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf) = @_;
2017 if ($rule->{macro}) {
2018 $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
2023 # update all or nothing
2025 foreach my $r (@$rules) {
2026 push @ipt_rule_cmds, ipt_rule_to_cmds
($r, $chain, $ipversion, $cluster_conf, $fw_conf);
2028 foreach my $c (@ipt_rule_cmds) {
2029 ruleset_add_ipt_cmd
($ruleset, $chain, $c);
2033 sub ruleset_create_chain
{
2034 my ($ruleset, $chain) = @_;
2036 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
2037 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
2039 die "chain '$chain' already exists\n" if $ruleset->{$chain};
2041 $ruleset->{$chain} = [];
2044 sub ruleset_chain_exist
{
2045 my ($ruleset, $chain) = @_;
2047 return $ruleset->{$chain} ?
1 : undef;
2050 # add an iptables command (like generated by ipt_rule_to_cmds) to a chain
2051 sub ruleset_add_ipt_cmd
{
2052 my ($ruleset, $chain, $iptcmd) = @_;
2054 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2056 push @{$ruleset->{$chain}}, $iptcmd;
2059 sub ruleset_addrule
{
2060 my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
2062 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2064 if (defined($log) && $log) {
2065 my $logaction = get_log_rule_base
($chain, $vmid, $logmsg, $log);
2066 push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
2068 push @{$ruleset->{$chain}}, "-A $chain $match $action";
2071 sub ruleset_insertrule
{
2072 my ($ruleset, $chain, $match, $action, $log) = @_;
2074 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2076 unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2079 sub get_log_rule_base
{
2080 my ($chain, $vmid, $msg, $loglevel) = @_;
2082 $vmid = 0 if !defined($vmid);
2083 $msg = "" if !defined($msg);
2085 # Note: we use special format for prefix to pass further
2086 # info to log daemon (VMID, LOGLEVEL and CHAIN)
2088 return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2091 sub ruleset_add_chain_policy {
2092 my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2094 if ($policy eq 'ACCEPT') {
2096 my $rule = { action => 'ACCEPT' };
2097 rule_substitude_action($rule, { ACCEPT => $accept_action});
2098 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2100 } elsif ($policy eq 'DROP') {
2102 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop
");
2104 ruleset_addrule($ruleset, $chain, "", "-j DROP
", $loglevel, "policy
$policy: ", $vmid);
2105 } elsif ($policy eq 'REJECT') {
2106 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject
");
2108 ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject
", $loglevel, "policy
$policy:", $vmid);
2111 die "internal error
: unknown policy
'$policy'";
2115 sub ruleset_chain_add_ndp {
2116 my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2117 return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2119 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-solicitation
", $accept);
2120 if ($direction ne 'OUT' || $options->{radv}) {
2121 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-advertisement
", $accept);
2123 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type neighbor-solicitation
", $accept);
2124 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type neighbor-advertisement
", $accept);
2127 sub ruleset_chain_add_conn_filters {
2128 my ($ruleset, $chain, $accept) = @_;
2130 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
", "-j DROP
");
2131 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
", "-j
$accept");
2134 sub ruleset_chain_add_input_filters {
2135 my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2137 if ($cluster_conf->{ipset}->{blacklist}){
2138 if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist
")) {
2139 ruleset_create_chain($ruleset, "PVEFW-blacklist
");
2140 ruleset_addrule($ruleset, "PVEFW-blacklist
", "", "-j DROP
", $loglevel, "DROP
: ");
2142 my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2143 ruleset_addrule($ruleset, $chain, "-m set
--match-set
${ipset_chain
} src
", "-j PVEFW-blacklist
");
2146 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2147 if ($ipversion == 4) {
2148 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
,NEW
", "-j PVEFW-smurfs
");
2152 if ($options->{tcpflags}) {
2153 ruleset_addrule($ruleset, $chain, "-p tcp
", "-j PVEFW-tcpflags
");
2157 sub ruleset_create_vm_chain {
2158 my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2160 ruleset_create_chain($ruleset, $chain);
2161 my $accept = generate_nfqueue($options);
2163 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2164 if ($ipversion == 4) {
2165 if ($direction eq 'OUT') {
2166 ruleset_generate_rule($ruleset, $chain, $ipversion,
2167 { action => 'PVEFW-SET-ACCEPT-MARK',
2168 proto => 'udp', sport => 68, dport => 67 });
2170 ruleset_generate_rule($ruleset, $chain, $ipversion,
2171 { action => 'ACCEPT',
2172 proto => 'udp', sport => 67, dport => 68 });
2174 } elsif ($ipversion == 6) {
2175 if ($direction eq 'OUT') {
2176 ruleset_generate_rule($ruleset, $chain, $ipversion,
2177 { action => 'PVEFW-SET-ACCEPT-MARK',
2178 proto => 'udp', sport => 546, dport => 547 });
2180 ruleset_generate_rule($ruleset, $chain, $ipversion,
2181 { action => 'ACCEPT',
2182 proto => 'udp', sport => 547, dport => 546 });
2188 if ($direction eq 'OUT') {
2189 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2190 ruleset_addrule($ruleset, $chain, "-m mac
! --mac-source
$macaddr", "-j DROP
");
2192 if ($ipversion == 6 && !$options->{radv}) {
2193 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-advertisement
", "-j DROP
");
2195 if ($ipfilter_ipset) {
2196 ruleset_addrule($ruleset, $chain, "-m set
! --match-set
$ipfilter_ipset src
", "-j DROP
");
2198 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2201 my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j
$accept";
2202 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2205 sub ruleset_add_group_rule {
2206 my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2208 my $group = $rule->{action};
2209 my $group_chain = "GROUP-
$group-$direction";
2210 if(!ruleset_chain_exist($ruleset, $group_chain)){
2211 generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2214 if ($direction eq 'OUT' && $rule->{iface_out}) {
2215 ruleset_addrule($ruleset, $chain, "-o
$rule->{iface_out
}", "-j
$group_chain");
2216 } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2217 ruleset_addrule($ruleset, $chain, "-i
$rule->{iface_in
}", "-j
$group_chain");
2219 ruleset_addrule($ruleset, $chain, "", "-j
$group_chain");
2222 ruleset_addrule($ruleset, $chain, "-m mark
--mark
$FWACCEPTMARK_ON", "-j
$action");
2225 sub ruleset_generate_vm_rules {
2226 my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
2228 my $lc_direction = lc($direction);
2230 my $in_accept = generate_nfqueue($options);
2232 foreach my $rule (@$rules) {
2233 next if $rule->{iface} && $rule->{iface} ne $netid;
2234 next if !$rule->{enable} || $rule->{errors};
2235 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2237 if ($rule->{type} eq 'group') {
2238 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2239 $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2241 next if $rule->{type} ne $lc_direction;
2243 if ($direction eq 'OUT') {
2244 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" });
2245 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf);
2247 rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject
" });
2248 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf);
2256 sub generate_nfqueue {
2259 if ($options->{ips}) {
2260 my $action = "NFQUEUE
";
2261 if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2262 if (defined($3) && defined($1)) {
2263 $action .= " --queue-balance
$1:$3";
2264 } elsif (defined($1)) {
2265 $action .= " --queue-num
$1";
2268 $action .= " --queue-bypass
" if $feature_ipset_nomatch; #need kernel 3.10
2275 sub ruleset_generate_vm_ipsrules {
2276 my ($ruleset, $options, $direction, $iface) = @_;
2278 if ($options->{ips} && $direction eq 'IN') {
2279 my $nfqueue = generate_nfqueue($options);
2281 if (!ruleset_chain_exist($ruleset, "PVEFW-IPS
")) {
2282 ruleset_create_chain($ruleset, "PVEFW-IPS
");
2285 ruleset_addrule($ruleset, "PVEFW-IPS
", "-m physdev
--physdev-out
$iface --physdev-is-bridged
", "-j
$nfqueue");
2289 sub generate_tap_rules_direction {
2290 my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2292 my $lc_direction = lc($direction);
2294 my $rules = $vmfw_conf->{rules};
2296 my $options = $vmfw_conf->{options};
2297 my $loglevel = get_option_log_level($options, "log_level_
${lc_direction
}");
2299 my $tapchain = "$iface-$direction";
2301 my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2302 my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2303 if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2305 # create chain with mac and ip filter
2306 ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2308 if ($options->{enable}) {
2309 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2311 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2316 if ($direction eq 'OUT') {
2317 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2319 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2322 my $accept = generate_nfqueue($options);
2323 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : $accept;
2324 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2326 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : 'ACCEPT';
2327 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2330 # plug the tap chain to bridge chain
2331 if ($direction eq 'IN') {
2332 ruleset_addrule($ruleset, "PVEFW-FWBR-IN
",
2333 "-m physdev
--physdev-is-bridged
--physdev-out
$iface", "-j
$tapchain");
2335 ruleset_addrule($ruleset, "PVEFW-FWBR-OUT
",
2336 "-m physdev
--physdev-is-bridged
--physdev-in
$iface", "-j
$tapchain");
2340 sub enable_host_firewall {
2341 my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2343 my $options = $hostfw_conf->{options};
2344 my $cluster_options = $cluster_conf->{options};
2345 my $rules = $hostfw_conf->{rules};
2346 my $cluster_rules = $cluster_conf->{rules};
2348 # host inbound firewall
2349 my $chain = "PVEFW-HOST-IN
";
2350 ruleset_create_chain($ruleset, $chain);
2352 my $loglevel = get_option_log_level($options, "log_level_in
");
2354 ruleset_addrule($ruleset, $chain, "-i lo
", "-j ACCEPT
");
2356 ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2357 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2358 ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2360 # we use RETURN because we need to check also tap rules
2361 my $accept_action = 'RETURN';
2363 ruleset_addrule($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_in} = $rule->{iface} if $rule->{iface};
2373 if ($rule->{type} eq 'group') {
2374 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2375 } elsif ($rule->{type} eq 'in') {
2376 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" });
2377 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf);
2381 delete $rule->{iface_in};
2384 # allow standard traffic for management ipset (includes cluster network)
2385 my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management
", $ipversion);
2386 my $mngmntsrc = "-m set
--match-set
${mngmnt_ipset_chain
} src
";
2387 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
8006", "-j
$accept_action"); # PVE API
2388 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
5900:5999", "-j
$accept_action"); # PVE VNC Console
2389 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
3128", "-j
$accept_action"); # SPICE Proxy
2390 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
22", "-j
$accept_action"); # SSH
2392 my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2393 my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2396 if ($localnet && ($ipversion == $localnet_ver)) {
2397 my $corosync_rule = "-p udp
--dport
5404:5405";
2398 ruleset_addrule($ruleset, $chain, "-s
$localnet -d
$localnet $corosync_rule", "-j
$accept_action");
2399 ruleset_addrule($ruleset, $chain, "-s
$localnet -m addrtype
--dst-type MULTICAST
$corosync_rule", "-j
$accept_action");
2402 # implement input policy
2403 my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2404 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2406 # host outbound firewall
2407 $chain = "PVEFW-HOST-OUT
";
2408 ruleset_create_chain($ruleset, $chain);
2410 $loglevel = get_option_log_level($options, "log_level_out
");
2412 ruleset_addrule($ruleset, $chain, "-o lo
", "-j ACCEPT
");
2414 ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2416 # we use RETURN because we may want to check other thigs later
2417 $accept_action = 'RETURN';
2418 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j
$accept_action");
2420 ruleset_addrule($ruleset, $chain, "-p igmp
", "-j
$accept_action"); # important for multicast
2422 # add host rules first, so that cluster wide rules can be overwritten
2423 foreach my $rule (@$rules, @$cluster_rules) {
2424 next if !$rule->{enable} || $rule->{errors};
2425 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2427 $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2429 if ($rule->{type} eq 'group') {
2430 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2431 } elsif ($rule->{type} eq 'out') {
2432 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" });
2433 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf);
2437 delete $rule->{iface_out};
2440 # allow standard traffic on cluster network
2441 if ($localnet && ($ipversion == $localnet_ver)) {
2442 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
8006", "-j
$accept_action"); # PVE API
2443 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
22", "-j
$accept_action"); # SSH
2444 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
5900:5999", "-j
$accept_action"); # PVE VNC Console
2445 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
3128", "-j
$accept_action"); # SPICE Proxy
2447 my $corosync_rule = "-p udp
--dport
5404:5405";
2448 ruleset_addrule($ruleset, $chain, "-d
$localnet $corosync_rule", "-j
$accept_action");
2449 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
$corosync_rule", "-j
$accept_action");
2452 # implement output policy
2453 $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2454 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2456 ruleset_addrule($ruleset, "PVEFW-OUTPUT
", "", "-j PVEFW-HOST-OUT
");
2457 ruleset_addrule($ruleset, "PVEFW-INPUT
", "", "-j PVEFW-HOST-IN
");
2460 sub generate_group_rules {
2461 my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2463 my $rules = $cluster_conf->{groups}->{$group};
2466 warn "no such security group
'$group'\n";
2467 $rules = []; # create empty chain
2470 my $chain = "GROUP-
${group
}-IN
";
2472 ruleset_create_chain($ruleset, $chain);
2473 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2475 foreach my $rule (@$rules) {
2476 next if $rule->{type} ne 'in';
2477 next if !$rule->{enable} || $rule->{errors};
2478 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2479 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" });
2480 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2483 $chain = "GROUP-
${group
}-OUT
";
2485 ruleset_create_chain($ruleset, $chain);
2486 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2488 foreach my $rule (@$rules) {
2489 next if $rule->{type} ne 'out';
2490 next if !$rule->{enable} || $rule->{errors};
2491 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2492 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2493 # check also other tap rules later
2494 rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject
" });
2495 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2500 my $valid_netdev_names = {};
2501 for (my $i = 0; $i < $MAX_NETS; $i++) {
2502 $valid_netdev_names->{"net
$i"} = 1;
2505 sub get_mark_values {
2506 my ($value, $mask) = @_;
2507 $value = hex($value) if $value =~ /^0x/;
2508 $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2509 $mask = 0xffffffff if !defined($mask);
2510 return ($value, $mask);
2514 my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2516 my $orig_line = $line;
2520 # we can add single line comments to the end of the rule
2521 if ($line =~ s/#\s*(.*?)\s*$//) {
2522 $rule->{comment} = decode('utf8', $1);
2525 # we can disable a rule when prefixed with '|'
2527 $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2529 $line =~ s/^(\S+)\s+(\S+)\s*// ||
2530 die "unable to parse rule
: $line\n";
2532 $rule->{type} = lc($1);
2533 $rule->{action} = $2;
2535 if ($rule->{type} eq 'in' || $rule->{type} eq 'out') {
2536 if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2537 $rule->{macro} = $1;
2538 $rule->{action} = $2;
2542 while (length($line)) {
2543 if ($line =~ s/^-i (\S+)\s*//) {
2544 $rule->{iface} = $1;
2548 last if $rule->{type} eq 'group';
2550 if ($line =~ s/^-p (\S+)\s*//) {
2551 $rule->{proto} = $1;
2555 if ($line =~ s/^-dport (\S+)\s*//) {
2556 $rule->{dport} = $1;
2560 if ($line =~ s/^-sport (\S+)\s*//) {
2561 $rule->{sport} = $1;
2564 if ($line =~ s/^-source (\S+)\s*//) {
2565 $rule->{source} = $1;
2568 if ($line =~ s/^-dest (\S+)\s*//) {
2576 die "unable to parse rule parameters
: $line\n" if length($line);
2578 $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2579 if ($rule->{errors}) {
2580 # The verbose flag really means we're running from the CLI and want
2581 # output on the console - in the other case we really want such errors
2582 # to go into the syslog instead.
2583 my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2584 $log->("$prefix - errors
in rule parameters
: $orig_line\n");
2585 foreach my $p (keys %{$rule->{errors}}) {
2586 $log->(" $p: $rule->{errors
}->{$p}\n");
2593 sub verify_ethertype {
2595 my $types = get_etc_ethertypes();
2596 die "unknown ethernet protocol type
: $value\n"
2597 if !defined($types->{byname}->{$value}) &&
2598 !defined($types->{byid}->{$value});
2601 sub parse_vmfw_option {
2606 my $loglevels = "emerg
|alert
|crit
|err
|warning
|notice
|info
|debug
|nolog
";
2608 if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2611 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2613 $value = $2 ? lc($3) : '';
2614 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2617 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2620 } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
2623 verify_ethertype($_) foreach split(/\s*,\s*/, $value);
2625 die "can
't parse option '$line'\n"
2628 return ($opt, $value);
2631 sub parse_hostfw_option {
2636 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2638 if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
2641 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2643 $value = $2 ? lc($3) : '';
2644 } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2648 die "can't parse option
'$line'\n"
2651 return ($opt, $value);
2654 sub parse_clusterfw_option {
2659 if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2662 if (($value > 1) && ((time() - $value) > 60)) {
2665 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2669 die "can
't parse option '$line'\n"
2672 return ($opt, $value);
2676 my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2678 my $alias = lc($cidr);
2679 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2680 $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2682 die "no such alias '$cidr'\n" if !$e;;
2684 return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2687 sub parse_ip_or_cidr {
2692 if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2695 } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2699 die "value does not look like a valid IP address or CIDR network\n";
2702 return wantarray ? ($cidr, $ipversion) : $cidr;
2708 # we can add single line comments to the end of the line
2709 my $comment = decode('utf8
', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2711 if ($line =~ m/^(\S+)\s(\S+)$/) {
2712 my ($name, $cidr) = ($1, $2);
2715 ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2720 ipversion => $ipversion,
2722 $data->{comment} = $comment if $comment;
2729 sub generic_fw_config_parser {
2730 my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2735 my $res = $empty_conf;
2737 while (defined(my $line = <$fh>)) {
2738 next if $line =~ m/^#/;
2739 next if $line =~ m/^\s*$/;
2743 my $linenr = $fh->input_line_number();
2744 my $prefix = "$filename (line $linenr)";
2746 if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2747 $section = 'options
';
2751 if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2752 $section = 'aliases
';
2756 if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2757 $section = 'groups
';
2761 die "security group name too long\n" if length($group) > $max_group_name_length;
2762 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2765 ($section, $group, $comment) = undef;
2766 warn "$prefix: $err";
2770 $res->{$section}->{$group} = [];
2771 $res->{group_comments}->{$group} = decode('utf8
', $comment)
2776 if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2781 if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2786 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2787 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2790 ($section, $group, $comment) = undef;
2791 warn "$prefix: $err";
2795 $res->{$section}->{$group} = [];
2796 $res->{ipset_comments}->{$group} = decode('utf8
', $comment)
2802 warn "$prefix: skip line - no section\n";
2806 if ($section eq 'options
') {
2809 if ($rule_env eq 'cluster
') {
2810 ($opt, $value) = parse_clusterfw_option($line);
2811 } elsif ($rule_env eq 'host
') {
2812 ($opt, $value) = parse_hostfw_option($line);
2814 ($opt, $value) = parse_vmfw_option($line);
2816 $res->{options}->{$opt} = $value;
2818 warn "$prefix: $@" if $@;
2819 } elsif ($section eq 'aliases
') {
2821 my $data = parse_alias($line);
2822 $res->{aliases}->{lc($data->{name})} = $data;
2824 warn "$prefix: $@" if $@;
2825 } elsif ($section eq 'rules
') {
2827 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2829 warn "$prefix: $err";
2832 push @{$res->{$section}}, $rule;
2833 } elsif ($section eq 'groups
') {
2835 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group
', $verbose); };
2837 warn "$prefix: $err";
2840 push @{$res->{$section}->{$group}}, $rule;
2841 } elsif ($section eq 'ipset
') {
2842 # we can add single line comments to the end of the rule
2843 my $comment = decode('utf8
', $1) if $line =~ s/#\s*(.*?)\s*$//;
2845 $line =~ m/^(\!)?\s*(\S+)\s*$/;
2850 if ($nomatch && !$feature_ipset_nomatch) {
2851 $errors->{nomatch} = "nomatch not supported by kernel";
2855 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2856 resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2858 $cidr = parse_ip_or_cidr($cidr);
2863 $errors->{cidr} = $err;
2866 if ($cidr =~ m!/0+$!) {
2867 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
2870 my $entry = { cidr => $cidr };
2871 $entry->{nomatch} = 1 if $nomatch;
2872 $entry->{comment} = $comment if $comment;
2873 $entry->{errors} = $errors if $errors;
2875 if ($verbose && $errors) {
2876 warn "$prefix - errors in ipset '$group': $line\n";
2877 foreach my $p (keys %{$errors}) {
2878 warn " $p: $errors->{$p}\n";
2882 push @{$res->{$section}->{$group}}, $entry;
2884 warn "$prefix: skip line - unknown section\n";
2892 sub parse_hostfw_config {
2893 my ($filename, $fh, $cluster_conf, $verbose) = @_;
2895 my $empty_conf = { rules => [], options => {}};
2897 return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host
');
2900 sub parse_vmfw_config {
2901 my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2908 ipset_comments => {},
2911 return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2914 sub parse_clusterfw_config {
2915 my ($filename, $fh, $verbose) = @_;
2925 group_comments => {},
2927 ipset_comments => {},
2930 return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster
');
2934 my ($code, @param) = @_;
2938 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2945 sub read_local_vm_config {
2950 my $vmdata = { qemu => $qemu, lxc => $lxc };
2952 my $vmlist = PVE::Cluster::get_vmlist();
2953 return $vmdata if !$vmlist || !$vmlist->{ids};
2954 my $ids = $vmlist->{ids};
2956 foreach my $vmid (keys %$ids) {
2957 next if !$vmid; # skip VE0
2958 my $d = $ids->{$vmid};
2959 next if !$d->{node} || $d->{node} ne $nodename;
2960 next if !$d->{type};
2961 if ($d->{type} eq 'qemu
') {
2962 if ($have_qemu_server) {
2963 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
2964 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2965 $qemu->{$vmid} = $conf;
2968 } elsif ($d->{type} eq 'lxc
') {
2970 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
2971 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2972 $lxc->{$vmid} = $conf;
2981 sub load_vmfw_conf {
2982 my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2986 $dir = $pvefw_conf_dir if !defined($dir);
2988 my $filename = "$dir/$vmid.fw";
2989 if (my $fh = IO::File->new($filename, O_RDONLY)) {
2990 $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2991 $vmfw_conf->{vmid} = $vmid;
2997 my $format_rules = sub {
2998 my ($rules, $allow_iface) = @_;
3002 foreach my $rule (@$rules) {
3003 if ($rule->{type} eq 'in' || $rule->{type} eq 'out
' || $rule->{type} eq 'group
') {
3004 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
3005 $raw .= uc($rule->{type});
3006 if ($rule->{macro}) {
3007 $raw .= " $rule->{macro}($rule->{action})";
3009 $raw .= " " . $rule->{action};
3011 if ($allow_iface && $rule->{iface}) {
3012 $raw .= " -i $rule->{iface}";
3015 if ($rule->{type} ne 'group
') {
3016 $raw .= " -source $rule->{source}" if $rule->{source};
3017 $raw .= " -dest $rule->{dest}" if $rule->{dest};
3018 $raw .= " -p $rule->{proto}" if $rule->{proto};
3019 $raw .= " -dport $rule->{dport}" if $rule->{dport};
3020 $raw .= " -sport $rule->{sport}" if $rule->{sport};
3023 $raw .= " # " . encode('utf8
', $rule->{comment})
3024 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
3027 die "unknown rule type '$rule->{type
}'";
3034 my $format_options = sub {
3039 $raw .= "[OPTIONS]\n\n";
3040 foreach my $opt (keys %$options) {
3041 $raw .= "$opt: $options->{$opt}\n";
3048 my $format_aliases = sub {
3053 $raw .= "[ALIASES]\n\n";
3054 foreach my $k (keys %$aliases) {
3055 my $e = $aliases->{$k};
3056 $raw .= "$e->{name} $e->{cidr}";
3057 $raw .= " # " . encode('utf8
', $e->{comment})
3058 if $e->{comment} && $e->{comment} !~ m/^\s*$/;
3066 my $format_ipsets = sub {
3071 foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
3072 if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
3073 my $utf8comment = encode('utf8
', $comment);
3074 $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3076 $raw .= "[IPSET $ipset]\n\n";
3078 my $options = $fw_conf->{ipset}->{$ipset};
3081 foreach my $entry (@$options) {
3082 $nethash->{$entry->{cidr}} = $entry;
3085 foreach my $cidr (sort keys %$nethash) {
3086 my $entry = $nethash->{$cidr};
3087 my $line = $entry->{nomatch} ? '!' : '';
3088 $line .= $entry->{cidr};
3089 $line .= " # " . encode('utf8
', $entry->{comment})
3090 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3100 sub save_vmfw_conf {
3101 my ($vmid, $vmfw_conf) = @_;
3105 my $options = $vmfw_conf->{options};
3106 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3108 my $aliases = $vmfw_conf->{aliases};
3109 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3111 $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
3113 my $rules = $vmfw_conf->{rules} || [];
3114 if ($rules && scalar(@$rules)) {
3115 $raw .= "[RULES]\n\n";
3116 $raw .= &$format_rules($rules, 1);
3120 my $filename = "$pvefw_conf_dir/$vmid.fw";
3122 mkdir $pvefw_conf_dir;
3123 PVE::Tools::file_set_contents($filename, $raw);
3129 sub remove_vmfw_conf {
3132 my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3134 unlink $vmfw_conffile;
3137 sub clone_vmfw_conf {
3138 my ($vmid, $newid) = @_;
3140 my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3141 my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3143 if (-f $clonevm_conffile) {
3144 unlink $clonevm_conffile;
3146 if (-f $sourcevm_conffile) {
3147 my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3148 PVE::Tools::file_set_contents($clonevm_conffile, $data);
3152 sub read_vm_firewall_configs {
3153 my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
3155 my $vmfw_configs = {};
3157 foreach my $vmid (keys %{$vmdata->{qemu}}) {
3158 my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm
', $vmid, $dir, $verbose);
3159 next if !$vmfw_conf->{options}; # skip if file does not exists
3160 $vmfw_configs->{$vmid} = $vmfw_conf;
3162 foreach my $vmid (keys %{$vmdata->{lxc}}) {
3163 my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct
', $vmid, $dir, $verbose);
3164 next if !$vmfw_conf->{options}; # skip if file does not exists
3165 $vmfw_configs->{$vmid} = $vmfw_conf;
3168 return $vmfw_configs;
3171 sub get_option_log_level {
3172 my ($options, $k) = @_;
3174 my $v = $options->{$k};
3175 $v = $default_log_level if !defined($v);
3177 return undef if $v eq '' || $v eq 'nolog
';
3179 $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
3181 return $v if ($v >= 0) && ($v <= 7);
3183 warn "unknown log level ($k = '$v')\n";
3188 sub generate_std_chains {
3189 my ($ruleset, $options, $ipversion) = @_;
3191 my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3193 my $loglevel = get_option_log_level($options, 'smurf_log_level
');
3194 my $chain = 'PVEFW-smurflog
';
3195 if ( $std_chains->{$chain} ) {
3196 foreach my $r (@{$std_chains->{$chain}}) {
3197 $r->{log} = $loglevel;
3201 # same as shorewall logflags action.
3202 $loglevel = get_option_log_level($options, 'tcp_flags_log_level
');
3203 $chain = 'PVEFW-logflags
';
3204 if ( $std_chains->{$chain} ) {
3205 foreach my $r (@{$std_chains->{$chain}}) {
3206 $r->{log} = $loglevel;
3210 foreach my $chain (keys %$std_chains) {
3211 ruleset_create_chain($ruleset, $chain);
3212 foreach my $rule (@{$std_chains->{$chain}}) {
3214 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
3216 die "rule $rule as string - should not happen";
3222 sub generate_ipset_chains {
3223 my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3225 foreach my $ipset (keys %{$ipsets}) {
3227 my $options = $ipsets->{$ipset};
3229 if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3230 if (my $ips = $device_ips->{$1}) {
3231 $options = [@$options, @$ips];
3237 foreach my $entry (@$options) {
3238 next if $entry->{errors}; # skip entries with errors
3241 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3242 ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3244 ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3246 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3248 # ip_compress_address takes an address only, no CIDR
3249 my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3250 $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3251 $cidr .= $prefix_len if defined($prefix_len);
3257 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3262 foreach my $ipversion (4, 6) {
3263 my $data = $nethash->{$ipversion};
3265 my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3267 my $hashsize = scalar(@$options);
3268 if ($hashsize <= 64) {
3271 $hashsize = round_powerof2($hashsize);
3274 my $family = $ipversion == "6" ? "inet6" : "inet";
3276 $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3278 foreach my $cidr (sort keys %$data) {
3279 my $entry = $data->{$cidr};
3281 my $cmd = "add $name $cidr";
3282 if ($entry->{nomatch}) {
3283 if ($feature_ipset_nomatch) {
3284 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3286 warn "ignore !$cidr - nomatch not supported by kernel\n";
3289 push @{$ipset_ruleset->{$name}}, $cmd;
3296 sub round_powerof2 {
3300 $int |= $int >> $_ foreach (1,2,4,8,16);
3304 sub load_clusterfw_conf {
3305 my ($filename, $verbose) = @_;
3307 $filename = $clusterfw_conf_filename if !defined($filename);
3309 my $cluster_conf = {};
3310 if (my $fh = IO::File->new($filename, O_RDONLY)) {
3311 $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3314 return $cluster_conf;
3317 sub save_clusterfw_conf {
3318 my ($cluster_conf) = @_;
3322 my $options = $cluster_conf->{options};
3323 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3325 my $aliases = $cluster_conf->{aliases};
3326 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3328 $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3330 my $rules = $cluster_conf->{rules};
3331 if ($rules && scalar(@$rules)) {
3332 $raw .= "[RULES]\n\n";
3333 $raw .= &$format_rules($rules, 1);
3337 if ($cluster_conf->{groups}) {
3338 foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3339 my $rules = $cluster_conf->{groups}->{$group};
3340 if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3341 my $utf8comment = encode('utf8
', $comment);
3342 $raw .= "[group $group] # $utf8comment\n\n";
3344 $raw .= "[group $group]\n\n";
3347 $raw .= &$format_rules($rules, 0);
3353 mkdir $pvefw_conf_dir;
3354 PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3356 unlink $clusterfw_conf_filename;
3360 sub load_hostfw_conf {
3361 my ($cluster_conf, $filename, $verbose) = @_;
3363 $filename = $hostfw_conf_filename if !defined($filename);
3365 my $hostfw_conf = {};
3366 if (my $fh = IO::File->new($filename, O_RDONLY)) {
3367 $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3369 return $hostfw_conf;
3372 sub save_hostfw_conf {
3373 my ($hostfw_conf) = @_;
3377 my $options = $hostfw_conf->{options};
3378 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3380 my $rules = $hostfw_conf->{rules};
3381 if ($rules && scalar(@$rules)) {
3382 $raw .= "[RULES]\n\n";
3383 $raw .= &$format_rules($rules, 1);
3388 PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3390 unlink $hostfw_conf_filename;
3395 my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3399 # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3400 $pve_std_chains = dclone($pve_std_chains_conf);
3402 if ($vmdata) { # test mode
3403 my $testdir = $vmdata->{testdir} || die "no test directory specified";
3404 my $filename = "$testdir/cluster.fw";
3405 $cluster_conf = load_clusterfw_conf($filename, $verbose);
3407 $filename = "$testdir/host.fw";
3408 $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3410 $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3411 } else { # normal operation
3412 $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3414 $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3416 $vmdata = read_local_vm_config();
3417 $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3420 return ({},{},{}) if !$cluster_conf->{options}->{enable};
3423 if ($cluster_conf->{aliases}->{local_network}) {
3424 $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3427 ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3429 $cluster_conf->{aliases}->{local_network} = {
3430 name => 'local_network
', cidr => $localnet, ipversion => $localnet_ver };
3433 push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3435 my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3436 my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3437 my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $verbose);
3438 my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3440 return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
3443 sub compile_iptables_filter {
3444 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3448 ruleset_create_chain($ruleset, "PVEFW-INPUT");
3449 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3451 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3453 my $hostfw_options = $hostfw_conf->{options} || {};
3455 # fixme: what log level should we use here?
3456 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3458 ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3460 ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3461 ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3463 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3465 ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3466 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3468 generate_std_chains($ruleset, $hostfw_options, $ipversion);
3470 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3472 if ($hostfw_enable) {
3473 eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3474 warn $@ if $@; # just to be sure - should not happen
3477 # generate firewall rules for QEMU VMs
3478 foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3480 my $conf = $vmdata->{qemu}->{$vmid};
3481 my $vmfw_conf = $vmfw_configs->{$vmid};
3482 return if !$vmfw_conf;
3484 foreach my $netid (sort keys %$conf) {
3485 next if $netid !~ m/^net(\d+)$/;
3486 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3487 next if !$net->{firewall};
3488 my $iface = "tap${vmid}i$1";
3490 my $macaddr = $net->{macaddr};
3491 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3492 $vmfw_conf, $vmid, 'IN
', $ipversion);
3493 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3494 $vmfw_conf, $vmid, 'OUT
', $ipversion);
3497 warn $@ if $@; # just to be sure - should not happen
3500 # generate firewall rules for LXC containers
3501 foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3503 my $conf = $vmdata->{lxc}->{$vmid};
3504 my $vmfw_conf = $vmfw_configs->{$vmid};
3505 return if !$vmfw_conf;
3507 if ($vmfw_conf->{options}->{enable}) {
3508 foreach my $netid (sort keys %$conf) {
3509 next if $netid !~ m/^net(\d+)$/;
3510 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3511 next if !$net->{firewall};
3512 my $iface = "veth${vmid}i$1";
3513 my $macaddr = $net->{hwaddr};
3514 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3515 $vmfw_conf, $vmid, 'IN
', $ipversion);
3516 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3517 $vmfw_conf, $vmid, 'OUT
', $ipversion);
3521 warn $@ if $@; # just to be sure - should not happen
3524 if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3525 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3531 sub mac_to_linklocal {
3533 my @parts = split(/:/, $macaddr);
3534 # The standard link local address uses the fe80::/64 prefix with the
3535 # modified EUI-64 identifier derived from the MAC address by flipping the
3536 # universal/local bit and inserting FF:FE in the middle.
3538 $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3539 my @meui64 = (@parts[0,1,2], 'ff
', 'fe
', @parts[3,4,5]);
3540 return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3543 sub compile_ipsets {
3544 my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3547 if ($cluster_conf->{aliases}->{local_network}) {
3548 $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3551 ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3553 $cluster_conf->{aliases}->{local_network} = {
3554 name => 'local_network
', cidr => $localnet, ipversion => $localnet_ver };
3557 push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3560 my $ipset_ruleset = {};
3562 # generate ipsets for QEMU VMs
3563 foreach my $vmid (keys %{$vmdata->{qemu}}) {
3565 my $conf = $vmdata->{qemu}->{$vmid};
3566 my $vmfw_conf = $vmfw_configs->{$vmid};
3567 return if !$vmfw_conf;
3569 # When the 'ipfilter
' option is enabled every device for which there
3570 # is no 'ipfilter-netX
' ipset defiend gets an implicit empty default
3572 # The reason is that ipfilter ipsets are always filled with standard
3573 # IPv6 link-local filters.
3574 my $ipsets = $vmfw_conf->{ipset};
3575 my $implicit_sets = {};
3577 my $device_ips = {};
3578 foreach my $netid (keys %$conf) {
3579 next if $netid !~ m/^net(\d+)$/;
3580 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3581 next if !$net->{firewall};
3583 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3584 $implicit_sets->{"ipfilter-$netid"} = [];
3587 my $macaddr = $net->{macaddr};
3588 my $linklocal = mac_to_linklocal($macaddr);
3589 $device_ips->{$netid} = [
3590 { cidr => $linklocal },
3591 { cidr => 'fe80
::/10', nomatch => 1 }
3595 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3596 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3598 warn $@ if $@; # just to be sure - should not happen
3601 # generate firewall rules for LXC containers
3602 foreach my $vmid (keys %{$vmdata->{lxc}}) {
3604 my $conf = $vmdata->{lxc}->{$vmid};
3605 my $vmfw_conf = $vmfw_configs->{$vmid};
3606 return if !$vmfw_conf;
3608 # When the 'ipfilter
' option is enabled every device for which there
3609 # is no 'ipfilter-netX
' ipset defiend gets an implicit empty default
3611 # The reason is that ipfilter ipsets are always filled with standard
3612 # IPv6 link-local filters, as well as the IP addresses configured
3613 # for the container.
3614 my $ipsets = $vmfw_conf->{ipset};
3615 my $implicit_sets = {};
3617 my $device_ips = {};
3618 foreach my $netid (keys %$conf) {
3619 next if $netid !~ m/^net(\d+)$/;
3620 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3621 next if !$net->{firewall};
3623 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3624 $implicit_sets->{"ipfilter-$netid"} = [];
3627 my $macaddr = $net->{hwaddr};
3628 my $linklocal = mac_to_linklocal($macaddr);
3629 my $set = $device_ips->{$netid} = [
3630 { cidr => $linklocal },
3631 { cidr => 'fe80
::/10', nomatch => 1 }
3633 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3634 push @$set, { cidr => $1 };
3636 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3637 push @$set, { cidr => $1 };
3641 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3642 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3644 warn $@ if $@; # just to be sure - should not happen
3647 generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3649 return $ipset_ruleset;
3652 sub compile_ebtables_filter {
3653 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $verbose) = @_;
3655 return ({}, {}) if !$cluster_conf->{options}->{enable};
3659 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3662 ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3663 #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED
', to speedup rules
3664 ruleset_addrule($ruleset, 'PVEFW-FORWARD
', '-p IPv4
', '-j ACCEPT
');
3665 ruleset_addrule($ruleset, 'PVEFW-FORWARD
', '-p IPv6
', '-j ACCEPT
');
3666 ruleset_addrule($ruleset, 'PVEFW-FORWARD
', '-o fwln
+', '-j PVEFW-FWBR-OUT
');
3668 # generate firewall rules for QEMU VMs
3669 foreach my $vmid (keys %{$vmdata->{qemu}}) {
3671 my $conf = $vmdata->{qemu}->{$vmid};
3672 my $vmfw_conf = $vmfw_configs->{$vmid};
3673 return if !$vmfw_conf;
3675 foreach my $netid (keys %$conf) {
3676 next if $netid !~ m/^net(\d+)$/;
3677 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3678 next if !$net->{firewall};
3679 my $iface = "tap${vmid}i$1";
3680 my $macaddr = $net->{macaddr};
3682 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid);
3686 warn $@ if $@; # just to be sure - should not happen
3689 # generate firewall rules for LXC containers
3690 foreach my $vmid (keys %{$vmdata->{lxc}}) {
3692 my $conf = $vmdata->{lxc}->{$vmid};
3694 my $vmfw_conf = $vmfw_configs->{$vmid};
3695 return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3697 foreach my $netid (keys %$conf) {
3698 next if $netid !~ m/^net(\d+)$/;
3699 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3700 next if !$net->{firewall};
3701 my $iface = "veth${vmid}i$1";
3702 my $macaddr = $net->{hwaddr};
3703 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid);
3706 warn $@ if $@; # just to be sure - should not happen
3712 sub generate_tap_layer2filter {
3713 my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid) = @_;
3714 my $options = $vmfw_conf->{options};
3716 my $tapchain = $iface."-OUT";
3718 # ebtables remove zeros from mac pairs
3719 $macaddr =~ s/0([0-9a-f])/$1/ig;
3720 $macaddr = lc($macaddr);
3722 ruleset_create_chain($ruleset, $tapchain);
3724 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
3725 ruleset_addrule($ruleset, $tapchain, "-s ! $macaddr", '-j DROP
');
3728 if (defined($options->{layer2_protocols})){
3729 foreach my $proto (split(/,/, $options->{layer2_protocols})) {
3730 ruleset_addrule($ruleset, $tapchain, "-p $proto", '-j ACCEPT
');
3732 ruleset_addrule($ruleset, $tapchain, '', "-j DROP");
3734 ruleset_addrule($ruleset, $tapchain, '', '-j ACCEPT
');
3737 ruleset_addrule($ruleset, 'PVEFW-FWBR-OUT
', "-i $iface", "-j $tapchain");
3740 sub get_ruleset_status {
3741 my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3743 my $statushash = {};
3745 foreach my $chain (sort keys %$ruleset) {
3746 my $sig = &$digest_fn($ruleset->{$chain});
3748 $statushash->{$chain}->{sig} = $sig;
3750 my $oldsig = $active_chains->{$chain};
3751 if (!defined($oldsig)) {
3752 $statushash->{$chain}->{action} = 'create
';
3754 if ($oldsig eq $sig) {
3755 $statushash->{$chain}->{action} = 'exists';
3757 $statushash->{$chain}->{action} = 'update
';
3760 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3761 foreach my $cmd (@{$ruleset->{$chain}}) {
3762 print "\t$cmd\n" if $verbose;
3766 foreach my $chain (sort keys %$active_chains) {
3767 if (!defined($ruleset->{$chain})) {
3768 my $sig = $active_chains->{$chain};
3769 $statushash->{$chain}->{action} = 'delete';
3770 $statushash->{$chain}->{sig} = $sig;
3771 print "delete $chain ($sig)\n" if $verbose;
3778 sub print_sig_rule {
3779 my ($chain, $sig) = @_;
3781 # We just use this to store a SHA1 checksum used to detect changes
3782 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3785 sub get_ruleset_cmdlist {
3786 my ($ruleset, $verbose, $iptablescmd) = @_;
3788 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3790 my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3791 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3793 # create missing chains first
3794 foreach my $chain (sort keys %$ruleset) {
3795 my $stat = $statushash->{$chain};
3796 die "internal error" if !$stat;
3797 next if $stat->{action} ne 'create
';
3799 $cmdlist .= ":$chain - [0:0]\n";
3802 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3803 my $chain = "PVEFW-$h";
3804 if ($ruleset->{$chain} && !$hooks->{$h}) {
3805 $cmdlist .= "-A $h -j $chain\n";
3809 foreach my $chain (sort keys %$ruleset) {
3810 my $stat = $statushash->{$chain};
3811 die "internal error" if !$stat;
3813 if ($stat->{action
} eq 'update' || $stat->{action
} eq 'create') {
3814 $cmdlist .= "-F $chain\n";
3815 foreach my $cmd (@{$ruleset->{$chain}}) {
3816 $cmdlist .= "$cmd\n";
3818 $cmdlist .= print_sig_rule
($chain, $stat->{sig
});
3819 } elsif ($stat->{action
} eq 'delete') {
3820 die "internal error"; # this should not happen
3821 } elsif ($stat->{action
} eq 'exists') {
3824 die "internal error - unknown status '$stat->{action}'";
3828 foreach my $chain (keys %$statushash) {
3829 next if $statushash->{$chain}->{action
} ne 'delete';
3830 $cmdlist .= "-F $chain\n";
3832 foreach my $chain (keys %$statushash) {
3833 next if $statushash->{$chain}->{action
} ne 'delete';
3834 next if $chain eq 'PVEFW-INPUT';
3835 next if $chain eq 'PVEFW-OUTPUT';
3836 next if $chain eq 'PVEFW-FORWARD';
3837 $cmdlist .= "-X $chain\n";
3840 my $changes = $cmdlist ne "*filter\n" ?
1 : 0;
3842 $cmdlist .= "COMMIT\n";
3844 return wantarray ?
($cmdlist, $changes) : $cmdlist;
3847 sub get_ebtables_cmdlist
{
3848 my ($ruleset, $verbose) = @_;
3851 my $cmdlist = "*filter\n";
3853 my ($active_chains, $hooks) = ebtables_get_chains
();
3854 my $statushash = get_ruleset_status
($ruleset, $active_chains, \
&iptables_chain_digest
, $verbose);
3856 # create chains first
3857 foreach my $chain (sort keys %$ruleset) {
3858 my $stat = $statushash->{$chain};
3859 die "internal error" if !$stat;
3860 $cmdlist .= ":$chain ACCEPT\n";
3863 if ($ruleset->{FORWARD
}) {
3864 $cmdlist .= "-A FORWARD -j PVEFW-FORWARD\n";
3867 foreach my $chain (sort keys %$ruleset) {
3868 my $stat = $statushash->{$chain};
3869 die "internal error" if !$stat;
3870 $changes = 1 if ($stat->{action
} ne 'exists');
3872 foreach my $cmd (@{$ruleset->{$chain}}) {
3873 $cmdlist .= "$cmd\n";
3877 return wantarray ?
($cmdlist, $changes) : $cmdlist;
3880 sub get_ipset_cmdlist
{
3881 my ($ruleset, $verbose) = @_;
3885 my $delete_cmdlist = "";
3887 my $active_chains = ipset_get_chains
();
3888 my $statushash = get_ruleset_status
($ruleset, $active_chains, \
&ipset_chain_digest
, $verbose);
3890 # remove stale _swap chains
3891 foreach my $chain (keys %$active_chains) {
3892 if ($chain =~ m/^PVEFW-\S+_swap$/) {
3893 $cmdlist .= "destroy $chain\n";
3897 foreach my $chain (keys %$ruleset) {
3898 my $stat = $statushash->{$chain};
3899 die "internal error" if !$stat;
3901 if ($stat->{action
} eq 'create') {
3902 foreach my $cmd (@{$ruleset->{$chain}}) {
3903 $cmdlist .= "$cmd\n";
3908 foreach my $chain (keys %$ruleset) {
3909 my $stat = $statushash->{$chain};
3910 die "internal error" if !$stat;
3912 if ($stat->{action
} eq 'update') {
3913 my $chain_swap = $chain."_swap";
3915 foreach my $cmd (@{$ruleset->{$chain}}) {
3916 $cmd =~ s/$chain/$chain_swap/;
3917 $cmdlist .= "$cmd\n";
3919 $cmdlist .= "swap $chain_swap $chain\n";
3920 $cmdlist .= "flush $chain_swap\n";
3921 $cmdlist .= "destroy $chain_swap\n";
3925 # the remove unused chains
3926 foreach my $chain (keys %$statushash) {
3927 next if $statushash->{$chain}->{action
} ne 'delete';
3929 $delete_cmdlist .= "flush $chain\n";
3930 $delete_cmdlist .= "destroy $chain\n";
3933 my $changes = ($cmdlist || $delete_cmdlist) ?
1 : 0;
3935 return ($cmdlist, $delete_cmdlist, $changes);
3939 my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset, $verbose) = @_;
3941 enable_bridge_firewall
();
3943 my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3944 get_ipset_cmdlist
($ipset_ruleset, $verbose);
3946 my ($cmdlist, $changes) = get_ruleset_cmdlist
($ruleset, $verbose);
3947 my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist
($rulesetv6, $verbose, "ip6tables");
3948 my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist
($ebtables_ruleset, $verbose);
3951 if ($ipset_changes) {
3952 print "ipset changes:\n";
3953 print $ipset_create_cmdlist if $ipset_create_cmdlist;
3954 print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3958 print "iptables changes:\n";
3963 print "ip6tables changes:\n";
3967 if ($ebtables_changes) {
3968 print "ebtables changes:\n";
3969 print $ebtables_cmdlist;
3973 my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3974 PVE
::Tools
::file_set_contents
($tmpfile, $ipset_create_cmdlist || '');
3976 ipset_restore_cmdlist
($ipset_create_cmdlist);
3978 $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3979 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlist || '');
3981 iptables_restore_cmdlist
($cmdlist);
3983 $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3984 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlistv6 || '');
3986 ip6tables_restore_cmdlist
($cmdlistv6);
3988 $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3989 PVE
::Tools
::file_set_contents
($tmpfile, $ipset_delete_cmdlist || '');
3991 ipset_restore_cmdlist
($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3993 ebtables_restore_cmdlist
($ebtables_cmdlist);
3995 $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
3996 PVE
::Tools
::file_set_contents
($tmpfile, $ebtables_cmdlist || '');
3998 # test: re-read status and check if everything is up to date
3999 my $active_chains = iptables_get_chains
();
4000 my $statushash = get_ruleset_status
($ruleset, $active_chains, \
&iptables_chain_digest
, 0);
4003 foreach my $chain (sort keys %$ruleset) {
4004 my $stat = $statushash->{$chain};
4005 if ($stat->{action
} ne 'exists') {
4006 warn "unable to update chain '$chain'\n";
4011 my $active_chainsv6 = iptables_get_chains
("ip6tables");
4012 my $statushashv6 = get_ruleset_status
($rulesetv6, $active_chainsv6, \
&iptables_chain_digest
, 0);
4014 foreach my $chain (sort keys %$rulesetv6) {
4015 my $stat = $statushashv6->{$chain};
4016 if ($stat->{action
} ne 'exists') {
4017 warn "unable to update chain '$chain'\n";
4022 my $active_ebtables_chains = ebtables_get_chains
();
4023 my $ebtables_statushash = get_ruleset_status
($ebtables_ruleset, $active_ebtables_chains, \
&iptables_chain_digest
, 0);
4025 foreach my $chain (sort keys %$ebtables_ruleset) {
4026 my $stat = $ebtables_statushash->{$chain};
4027 if ($stat->{action
} ne 'exists') {
4028 warn "ebtables : unable to update chain '$chain'\n";
4033 die "unable to apply firewall changes\n" if $errors;
4035 update_nf_conntrack_max
($hostfw_conf);
4037 update_nf_conntrack_tcp_timeout_established
($hostfw_conf);
4041 sub update_nf_conntrack_max
{
4042 my ($hostfw_conf) = @_;
4044 my $max = 65536; # reasonable default
4046 my $options = $hostfw_conf->{options
} || {};
4048 if (defined($options->{nf_conntrack_max
}) && ($options->{nf_conntrack_max
} > $max)) {
4049 $max = $options->{nf_conntrack_max
};
4050 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
4053 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
4054 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
4056 my $current = int(PVE
::Tools
::file_read_firstline
($filename_nf_conntrack_max) || $max);
4058 if ($current != $max) {
4059 my $hashsize = int($max/4);
4060 PVE
::ProcFSTools
::write_proc_entry
($filename_hashsize, $hashsize);
4061 PVE
::ProcFSTools
::write_proc_entry
($filename_nf_conntrack_max, $max);
4065 sub update_nf_conntrack_tcp_timeout_established
{
4066 my ($hostfw_conf) = @_;
4068 my $options = $hostfw_conf->{options
} || {};
4070 my $value = defined($options->{nf_conntrack_tcp_timeout_established
}) ?
$options->{nf_conntrack_tcp_timeout_established
} : 432000;
4072 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
4075 sub remove_pvefw_chains
{
4077 PVE
::Firewall
::remove_pvefw_chains_iptables
("iptables");
4078 PVE
::Firewall
::remove_pvefw_chains_iptables
("ip6tables");
4079 PVE
::Firewall
::remove_pvefw_chains_ipset
();
4083 sub remove_pvefw_chains_iptables
{
4084 my ($iptablescmd) = @_;
4086 my ($chash, $hooks) = iptables_get_chains
($iptablescmd);
4087 my $cmdlist = "*filter\n";
4089 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
4091 $cmdlist .= "-D $h -j PVEFW-$h\n";
4095 foreach my $chain (keys %$chash) {
4096 $cmdlist .= "-F $chain\n";
4099 foreach my $chain (keys %$chash) {
4100 $cmdlist .= "-X $chain\n";
4102 $cmdlist .= "COMMIT\n";
4104 if($iptablescmd eq "ip6tables") {
4105 ip6tables_restore_cmdlist
($cmdlist);
4107 iptables_restore_cmdlist
($cmdlist);
4111 sub remove_pvefw_chains_ipset
{
4113 my $ipset_chains = ipset_get_chains
();
4117 foreach my $chain (keys %$ipset_chains) {
4118 $cmdlist .= "flush $chain\n";
4119 $cmdlist .= "destroy $chain\n";
4122 ipset_restore_cmdlist
($cmdlist) if $cmdlist;
4126 my $cluster_conf = load_clusterfw_conf
();
4127 my $cluster_options = $cluster_conf->{options
};
4128 my $enable = $cluster_options->{enable
};
4132 # load required modules here
4138 my $cluster_conf = load_clusterfw_conf
();
4139 my $cluster_options = $cluster_conf->{options
};
4141 if (!$cluster_options->{enable
}) {
4142 PVE
::Firewall
::remove_pvefw_chains
();
4146 my $hostfw_conf = load_hostfw_conf
($cluster_conf);
4148 my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile
($cluster_conf, $hostfw_conf);
4150 apply_ruleset
($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);