9 use PVE
::Exception
qw(raise raise_param_exc);
10 use PVE
::JSONSchema
qw(register_standard_option get_standard_option);
13 use PVE
::Tools
qw($IPV4RE);
18 use PVE
::Tools
qw(run_command lock_file dir_glob_foreach);
21 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
22 my $clusterfw_conf_filename = "/etc/pve/firewall/cluster.fw";
24 # dynamically include PVE::QemuServer and PVE::OpenVZ
25 # to avoid dependency problems
28 require PVE
::QemuServer
;
29 $have_qemu_server = 1;
35 $have_pve_manager = 1;
38 PVE
::JSONSchema
::register_format
('IPv4orCIDR', \
&pve_verify_ipv4_or_cidr
);
39 sub pve_verify_ipv4_or_cidr
{
40 my ($cidr, $noerr) = @_;
42 if ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
43 return $cidr if Net
::IP-
>new($cidr);
44 return undef if $noerr;
45 die Net
::IP
::Error
() . "\n";
47 return undef if $noerr;
48 die "value does not look like a valid IP address or CIDR network\n";
51 PVE
::JSONSchema
::register_standard_option
('ipset-name', {
52 description
=> "IP set name.",
54 pattern
=> '[A-Za-z][A-Za-z0-9\-\_]+',
59 PVE
::JSONSchema
::register_standard_option
('pve-fw-alias', {
60 description
=> "Alias name.",
62 pattern
=> '[A-Za-z][A-Za-z0-9\-\_]+',
67 PVE
::JSONSchema
::register_standard_option
('pve-fw-loglevel' => {
68 description
=> "Log level.",
70 enum
=> ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
74 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
75 my $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
77 PVE
::JSONSchema
::register_standard_option
('pve-security-group-name', {
78 description
=> "Security Group name.",
80 pattern
=> $security_group_name_pattern,
85 my $feature_ipset_nomatch = 0;
87 my (undef, undef, $release) = POSIX
::uname
();
88 if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
89 my ($major, $minor) = ($1, $2);
90 $feature_ipset_nomatch = 1 if ($major > 3) ||
91 ($major == 3 && $minor >= 7);
98 my $nodename = PVE
::INotify
::nodename
();
100 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
102 my $default_log_level = 'info';
104 my $log_level_hash = {
115 # imported/converted from: /usr/share/shorewall/macro.*
116 my $pve_fw_macros = {
119 { action
=> 'PARAM', proto
=> 'udp', dport
=> '10080' },
120 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10080' },
123 "Auth (identd) traffic",
124 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '113' },
127 "Border Gateway Protocol traffic",
128 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '179' },
131 "BitTorrent traffic for BitTorrent 3.1 and earlier",
132 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6889' },
133 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
136 "BitTorrent traffic for BitTorrent 3.2 and later",
137 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6999' },
138 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
141 "Concurrent Versions System pserver traffic",
142 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2401' },
145 "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
146 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1494' },
147 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1604' },
148 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2598' },
151 "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
152 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3689' },
153 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3689' },
156 "Distributed Checksum Clearinghouse spam filtering mechanism",
157 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6277' },
160 "Forwarded DHCP traffic",
161 { action
=> 'PARAM', proto
=> 'udp', dport
=> '67:68', sport
=> '67:68' },
164 "Domain Name System traffic (upd and tcp)",
165 { action
=> 'PARAM', proto
=> 'udp', dport
=> '53' },
166 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '53' },
169 "Distributed Compiler service",
170 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3632' },
173 "File Transfer Protocol",
174 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '21' },
177 "Finger protocol (RFC 742)",
178 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '79' },
181 "GNUnet secure peer-to-peer networking traffic",
182 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2086' },
183 { action
=> 'PARAM', proto
=> 'udp', dport
=> '2086' },
184 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1080' },
185 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1080' },
188 "Generic Routing Encapsulation tunneling protocol",
189 { action
=> 'PARAM', proto
=> '47' },
192 "Git distributed revision control traffic",
193 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9418' },
196 "OpenPGP HTTP keyserver protocol traffic",
197 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '11371' },
200 "Hypertext Transfer Protocol (WWW)",
201 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
204 "Hypertext Transfer Protocol (WWW) over SSL",
205 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
208 "Internet Cache Protocol V2 (Squid) traffic",
209 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3130' },
212 "AOL Instant Messenger traffic",
213 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5190' },
216 "Internet Message Access Protocol",
217 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '143' },
220 "Internet Message Access Protocol over SSL",
221 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '993' },
224 "IPIP capsulation traffic",
225 { action
=> 'PARAM', proto
=> '94' },
229 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
230 { action
=> 'PARAM', proto
=> '50' },
233 "IPsec authentication (AH) traffic",
234 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
235 { action
=> 'PARAM', proto
=> '51' },
238 "IPsec traffic and Nat-Traversal",
239 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500' },
240 { action
=> 'PARAM', proto
=> 'udp', dport
=> '4500' },
241 { action
=> 'PARAM', proto
=> '50' },
244 "Internet Relay Chat traffic",
245 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6667' },
248 "HP Jetdirect printing",
249 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9100' },
252 "Layer 2 Tunneling Protocol traffic",
253 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1701' },
256 "Lightweight Directory Access Protocol traffic",
257 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '389' },
260 "Secure Lightweight Directory Access Protocol traffic",
261 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '636' },
264 "Microsoft Notification Protocol",
265 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1863' },
268 "Microsoft SQL Server",
269 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1433' },
272 "Mail traffic (SMTP, SMTPS, Submission)",
273 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
274 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
275 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
278 "Munin networked resource monitoring traffic",
279 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '4949' },
283 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3306' },
286 "NNTP traffic (Usenet).",
287 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '119' },
290 "Encrypted NNTP traffic (Usenet)",
291 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '563' },
294 "Network Time Protocol (ntpd)",
295 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
298 "OSPF multicast traffic",
299 { action
=> 'PARAM', proto
=> '89' },
303 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1194' },
306 "Symantec PCAnywere (tm)",
307 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5632' },
308 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5631' },
312 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '110' },
315 "Encrypted POP3 traffic",
316 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '995' },
319 "Point-to-Point Tunneling Protocol",
320 { action
=> 'PARAM', proto
=> '47' },
321 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1723' },
325 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
329 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5432' },
332 "Line Printer protocol printing",
333 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '515' },
336 "Microsoft Remote Desktop Protocol traffic",
337 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3389' },
340 "Routing Information Protocol (bidirectional)",
341 { action
=> 'PARAM', proto
=> 'udp', dport
=> '520' },
344 "BIND remote management protocol",
345 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '953' },
348 "Razor Antispam System",
349 { action
=> 'ACCEPT', proto
=> 'tcp', dport
=> '2703' },
352 "Remote time retrieval (rdate)",
353 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
357 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '873' },
360 "SANE network scanning",
361 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6566' },
364 "Microsoft SMB traffic",
365 { action
=> 'PARAM', proto
=> 'udp', dport
=> '135,445' },
366 { action
=> 'PARAM', proto
=> 'udp', dport
=> '137:139' },
367 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
368 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '135,139,445' },
371 "Samba Web Administration Tool",
372 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '901' },
375 "Simple Mail Transfer Protocol",
376 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
379 "Encrypted Simple Mail Transfer Protocol",
380 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
383 "Simple Network Management Protocol",
384 { action
=> 'PARAM', proto
=> 'udp', dport
=> '161:162' },
385 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '161' },
388 "Spam Assassin SPAMD traffic",
389 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '783' },
392 "Secure shell traffic",
393 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '22' },
396 "Subversion server (svnserve)",
397 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3690' },
400 "SixXS IPv6 Deployment and Tunnel Broker",
401 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3874' },
402 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3740' },
403 { action
=> 'PARAM', proto
=> '41' },
404 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5072,8374' },
407 "Squid web proxy traffic",
408 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3128' },
411 "Mail message submission traffic",
412 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
415 "Syslog protocol (RFC 5424) traffic",
416 { action
=> 'PARAM', proto
=> 'udp', dport
=> '514' },
417 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '514' },
420 "Trivial File Transfer Protocol traffic",
421 { action
=> 'PARAM', proto
=> 'udp', dport
=> '69' },
425 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '23' },
429 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '992' },
432 "RFC 868 Time protocol",
433 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
436 "Traceroute (for up to 30 hops) traffic",
437 { action
=> 'PARAM', proto
=> 'udp', dport
=> '33434:33524' },
438 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
441 "VNC traffic for VNC display's 0 - 9",
442 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5900:5909' },
445 "VNC traffic from Vncservers to Vncviewers in listen mode",
446 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5500' },
449 "WWW traffic (HTTP and HTTPS)",
450 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
451 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
454 "Web Cache/Proxy traffic (port 8080)",
455 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '8080' },
459 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10000' },
462 "Whois (nicname, RFC 3912) traffic",
463 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '43' },
467 my $pve_fw_parsed_macros;
468 my $pve_fw_macro_descr;
469 my $pve_fw_preferred_macro_names = {};
471 my $pve_std_chains = {
472 'PVEFW-SET-ACCEPT-MARK' => [
473 "-j MARK --set-mark 1",
475 'PVEFW-DropBroadcast' => [
476 # same as shorewall 'Broadcast'
477 # simply DROP BROADCAST/MULTICAST/ANYCAST
478 # we can use this to reduce logging
479 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
480 { action
=> 'DROP', dsttype
=> 'MULTICAST' },
481 { action
=> 'DROP', dsttype
=> 'ANYCAST' },
482 { action
=> 'DROP', dest
=> '224.0.0.0/4' },
485 # same as shorewall 'reject'
486 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
487 { action
=> 'DROP', source
=> '224.0.0.0/4' },
488 { action
=> 'DROP', proto
=> 'icmp' },
489 "-p tcp -j REJECT --reject-with tcp-reset",
490 "-p udp -j REJECT --reject-with icmp-port-unreachable",
491 "-p icmp -j REJECT --reject-with icmp-host-unreachable",
492 "-j REJECT --reject-with icmp-host-prohibited",
495 # same as shorewall 'Drop', which is equal to DROP,
496 # but REJECT/DROP some packages to reduce logging,
497 # and ACCEPT critical ICMP types
498 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
499 # we are not interested in BROADCAST/MULTICAST/ANYCAST
500 { action
=> 'PVEFW-DropBroadcast' },
501 # ACCEPT critical ICMP types
502 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
503 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
504 # Drop packets with INVALID state
505 "-m conntrack --ctstate INVALID -j DROP",
506 # Drop Microsoft SMB noise
507 { action
=> 'DROP', proto
=> 'udp', dport
=> '135,445', nbdport
=> 2 },
508 { action
=> 'DROP', proto
=> 'udp', dport
=> '137:139'},
509 { action
=> 'DROP', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
510 { action
=> 'DROP', proto
=> 'tcp', dport
=> '135,139,445', nbdport
=> 3 },
511 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
512 # Drop new/NotSyn traffic so that it doesn't get logged
513 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
515 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
518 # same as shorewall 'Reject', which is equal to Reject,
519 # but REJECT/DROP some packages to reduce logging,
520 # and ACCEPT critical ICMP types
521 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
522 # we are not interested in BROADCAST/MULTICAST/ANYCAST
523 { action
=> 'PVEFW-DropBroadcast' },
524 # ACCEPT critical ICMP types
525 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
526 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
527 # Drop packets with INVALID state
528 "-m conntrack --ctstate INVALID -j DROP",
529 # Drop Microsoft SMB noise
530 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '135,445', nbdport
=> 2 },
531 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '137:139'},
532 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
533 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '135,139,445', nbdport
=> 3 },
534 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
535 # Drop new/NotSyn traffic so that it doesn't get logged
536 "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
538 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
540 'PVEFW-tcpflags' => [
541 # same as shorewall tcpflags action.
542 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
543 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
544 "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
545 "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
546 "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
547 "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
550 # same as shorewall smurfs action
551 # Filter packets for smurfs (packets with a broadcast address as the source).
552 "-s 0.0.0.0/32 -j RETURN",
553 "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
554 "-s 224.0.0.0/4 -g PVEFW-smurflog",
558 # iptables -p icmp -h
559 my $icmp_type_names = {
562 'destination-unreachable' => 1,
563 'network-unreachable' => 1,
564 'host-unreachable' => 1,
565 'protocol-unreachable' => 1,
566 'port-unreachable' => 1,
567 'fragmentation-needed' => 1,
568 'source-route-failed' => 1,
569 'network-unknown' => 1,
571 'network-prohibited' => 1,
572 'host-prohibited' => 1,
573 'TOS-network-unreachable' => 1,
574 'TOS-host-unreachable' => 1,
575 'communication-prohibited' => 1,
576 'host-precedence-violation' => 1,
577 'precedence-cutoff' => 1,
578 'source-quench' => 1,
580 'network-redirect' => 1,
581 'host-redirect' => 1,
582 'TOS-network-redirect' => 1,
583 'TOS-host-redirect' => 1,
585 'router-advertisement' => 1,
586 'router-solicitation' => 1,
587 'time-exceeded' => 1,
588 'ttl-zero-during-transit' => 1,
589 'ttl-zero-during-reassembly' => 1,
590 'parameter-problem' => 1,
591 'ip-header-bad' => 1,
592 'required-option-missing' => 1,
593 'timestamp-request' => 1,
594 'timestamp-reply' => 1,
595 'address-mask-request' => 1,
596 'address-mask-reply' => 1,
599 sub init_firewall_macros
{
601 $pve_fw_parsed_macros = {};
603 foreach my $k (keys %$pve_fw_macros) {
604 my $lc_name = lc($k);
605 my $macro = $pve_fw_macros->{$k};
606 if (!ref($macro->[0])) {
607 $pve_fw_macro_descr->{$k} = shift @$macro;
609 $pve_fw_preferred_macro_names->{$lc_name} = $k;
610 $pve_fw_parsed_macros->{$k} = $macro;
614 init_firewall_macros
();
617 return wantarray ?
($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
622 sub get_etc_services
{
624 return $etc_services if $etc_services;
626 my $filename = "/etc/services";
628 my $fh = IO
::File-
>new($filename, O_RDONLY
);
630 warn "unable to read '$filename' - $!\n";
636 while (my $line = <$fh>) {
638 next if $line =~m/^#/;
639 next if ($line =~m/^\s*$/);
641 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
642 $services->{byid
}->{$2}->{name
} = $1;
643 $services->{byid
}->{$2}->{port
} = $2;
644 $services->{byid
}->{$2}->{$3} = 1;
645 $services->{byname
}->{$1} = $services->{byid
}->{$2};
651 $etc_services = $services;
654 return $etc_services;
659 sub get_etc_protocols
{
660 return $etc_protocols if $etc_protocols;
662 my $filename = "/etc/protocols";
664 my $fh = IO
::File-
>new($filename, O_RDONLY
);
666 warn "unable to read '$filename' - $!\n";
672 while (my $line = <$fh>) {
674 next if $line =~m/^#/;
675 next if ($line =~m/^\s*$/);
677 if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
678 $protocols->{byid
}->{$2}->{name
} = $1;
679 $protocols->{byname
}->{$1} = $protocols->{byid
}->{$2};
685 $etc_protocols = $protocols;
687 return $etc_protocols;
690 sub parse_address_list
{
693 return if $str =~ m/^(\+)(\S+)$/; # ipset ref
694 return if $str =~ m/^${ip_alias_pattern}$/;
698 foreach my $elem (split(/,/, $str)) {
700 if (!Net
::IP-
>new($elem)) {
701 my $err = Net
::IP
::Error
();
702 die "invalid IP address: $err\n";
704 $iprange = 1 if $elem =~ m/-/;
707 die "you can use a range in a list\n" if $iprange && $count > 1;
710 sub parse_port_name_number_or_range
{
713 my $services = PVE
::Firewall
::get_etc_services
();
717 foreach my $item (split(/,/, $str)) {
719 if ($item =~ m/^(\d+):(\d+)$/) {
720 my ($port1, $port2) = ($1, $2);
721 die "invalid port '$port1'\n" if $port1 > 65535;
722 die "invalid port '$port2'\n" if $port2 > 65535;
723 } elsif ($item =~ m/^(\d+)$/) {
725 die "invalid port '$port'\n" if $port > 65535;
727 if ($icmp_type_names->{$item}) {
730 die "invalid port '$item'\n" if !$services->{byname
}->{$item};
735 die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
740 PVE
::JSONSchema
::register_format
('pve-fw-port-spec', \
&pve_fw_verify_port_spec
);
741 sub pve_fw_verify_port_spec
{
744 parse_port_name_number_or_range
($portstr);
749 PVE
::JSONSchema
::register_format
('pve-fw-v4addr-spec', \
&pve_fw_verify_v4addr_spec
);
750 sub pve_fw_verify_v4addr_spec
{
753 parse_address_list
($list);
758 PVE
::JSONSchema
::register_format
('pve-fw-protocol-spec', \
&pve_fw_verify_protocol_spec
);
759 sub pve_fw_verify_protocol_spec
{
762 my $protocols = get_etc_protocols
();
764 die "unknown protocol '$proto'\n" if $proto &&
765 !(defined($protocols->{byname
}->{$proto}) ||
766 defined($protocols->{byid
}->{$proto}));
772 # helper function for API
774 sub copy_opject_with_digest
{
777 my $sha = Digest
::SHA-
>new('sha1');
780 foreach my $k (sort keys %$object) {
781 my $v = $object->{$k};
782 next if !defined($v);
784 $sha->add($k, ':', $v, "\n");
787 my $digest = $sha->hexdigest;
789 $res->{digest
} = $digest;
791 return wantarray ?
($res, $digest) : $res;
794 sub copy_list_with_digest
{
797 my $sha = Digest
::SHA-
>new('sha1');
800 foreach my $entry (@$list) {
802 foreach my $k (sort keys %$entry) {
803 my $v = $entry->{$k};
804 next if !defined($v);
806 $sha->add($k, ':', $v, "\n");
811 my $digest = $sha->hexdigest;
813 foreach my $entry (@$res) {
814 $entry->{digest
} = $digest;
817 return wantarray ?
($res, $digest) : $res;
820 my $rule_properties = {
822 description
=> "Update rule at position <pos>.",
827 digest
=> get_standard_option
('pve-config-digest'),
831 enum
=> ['in', 'out', 'group'],
834 description
=> "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
837 pattern
=> $security_group_name_pattern,
846 iface
=> get_standard_option
('pve-iface', { optional
=> 1 }),
848 type
=> 'string', format
=> 'pve-fw-v4addr-spec',
852 type
=> 'string', format
=> 'pve-fw-v4addr-spec',
856 type
=> 'string', format
=> 'pve-fw-protocol-spec',
864 type
=> 'string', format
=> 'pve-fw-port-spec',
868 type
=> 'string', format
=> 'pve-fw-port-spec',
877 sub add_rule_properties
{
878 my ($properties) = @_;
880 foreach my $k (keys %$rule_properties) {
881 my $h = $rule_properties->{$k};
882 # copy data, so that we can modify later without side effects
883 foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
889 sub delete_rule_properties
{
890 my ($rule, $delete_str) = @_;
892 foreach my $opt (PVE
::Tools
::split_list
($delete_str)) {
893 raise_param_exc
({ 'delete' => "no such property ('$opt')"})
894 if !defined($rule_properties->{$opt});
895 raise_param_exc
({ 'delete' => "unable to delete required property '$opt'"})
896 if $opt eq 'type' || $opt eq 'action';
897 delete $rule->{$opt};
903 my $apply_macro = sub {
904 my ($macro_name, $param, $verify) = @_;
906 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
907 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
911 foreach my $templ (@$macro_rules) {
914 foreach my $k (keys %$templ) {
915 my $v = $templ->{$k};
918 $param_used->{$k} = 1;
919 } elsif ($v eq 'DEST') {
921 $param_used->{dest
} = 1;
922 } elsif ($v eq 'SOURCE') {
923 $v = $param->{source
};
924 $param_used->{source
} = 1;
928 my $msg = "missing parameter '$k' in macro '$macro_name'";
929 raise_param_exc
({ macro => $msg }) if $verify;
934 foreach my $k (keys %$param) {
935 next if $k eq 'macro';
936 next if !defined($param->{$k});
937 next if $param_used->{$k};
938 if (defined($rule->{$k})) {
939 if ($rule->{$k} ne $param->{$k}) {
940 my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
941 raise_param_exc
({ $k => $msg }) if $verify;
945 $rule->{$k} = $param->{$k};
955 my ($rule, $allow_groups) = @_;
957 my $type = $rule->{type
};
959 raise_param_exc
({ type
=> "missing property"}) if !$type;
960 raise_param_exc
({ action
=> "missing property"}) if !$rule->{action
};
962 if ($type eq 'in' || $type eq 'out') {
963 raise_param_exc
({ action
=> "unknown action '$rule->{action}'"})
964 if $rule->{action
} !~ m/^(ACCEPT|DROP|REJECT)$/;
965 } elsif ($type eq 'group') {
966 raise_param_exc
({ type
=> "security groups not allowed"})
968 raise_param_exc
({ action
=> "invalid characters in security group name"})
969 if $rule->{action
} !~ m/^${security_group_name_pattern}$/;
971 raise_param_exc
({ type
=> "unknown rule type '$type'"});
974 if ($rule->{iface
}) {
975 eval { PVE
::JSONSchema
::pve_verify_iface
($rule->{iface
}); };
976 raise_param_exc
({ iface
=> $@ }) if $@;
979 if ($rule->{macro}) {
980 my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})};
981 raise_param_exc
({ macro => "unknown macro '$rule->{macro}'"}) if !$preferred_name;
982 $rule->{macro} = $preferred_name;
985 if ($rule->{dport
}) {
986 eval { parse_port_name_number_or_range
($rule->{dport
}); };
987 raise_param_exc
({ dport
=> $@ }) if $@;
990 if ($rule->{sport
}) {
991 eval { parse_port_name_number_or_range
($rule->{sport
}); };
992 raise_param_exc
({ sport
=> $@ }) if $@;
995 if ($rule->{source
}) {
996 eval { parse_address_list
($rule->{source
}); };
997 raise_param_exc
({ source
=> $@ }) if $@;
1000 if ($rule->{dest
}) {
1001 eval { parse_address_list
($rule->{dest
}); };
1002 raise_param_exc
({ dest
=> $@ }) if $@;
1005 if ($rule->{macro}) {
1006 &$apply_macro($rule->{macro}, $rule, 1);
1012 sub copy_rule_data
{
1013 my ($rule, $param) = @_;
1015 foreach my $k (keys %$rule_properties) {
1016 if (defined(my $v = $param->{$k})) {
1017 if ($v eq '' || $v eq '-') {
1033 my $bridge_firewall_enabled = 0;
1035 sub enable_bridge_firewall
{
1037 return if $bridge_firewall_enabled; # only once
1039 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1040 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1042 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1043 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/ipv4/tcp_syncookies", "1");
1045 $bridge_firewall_enabled = 1;
1048 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1050 sub iptables_restore_cmdlist
{
1053 run_command
("/sbin/iptables-restore -n", input
=> $cmdlist);
1056 sub ipset_restore_cmdlist
{
1059 run_command
("/usr/sbin/ipset restore", input
=> $cmdlist);
1062 sub iptables_get_chains
{
1066 # check what chains we want to track
1067 my $is_pvefw_chain = sub {
1070 return 1 if $name =~ m/^PVEFW-\S+$/;
1072 return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1074 return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1076 return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1078 return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1079 return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1091 return if $line =~ m/^#/;
1092 return if $line =~ m/^\s*$/;
1094 if ($line =~ m/^\*(\S+)$/) {
1099 return if $table ne 'filter';
1101 if ($line =~ m/^:(\S+)\s/) {
1103 return if !&$is_pvefw_chain($chain);
1104 $res->{$chain} = "unknown";
1105 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1106 my ($chain, $sig) = ($1, $2);
1107 return if !&$is_pvefw_chain($chain);
1108 $res->{$chain} = $sig;
1109 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1112 # simply ignore the rest
1117 run_command
("/sbin/iptables-save", outfunc
=> $parser);
1119 return wantarray ?
($res, $hooks) : $res;
1122 sub iptables_chain_digest
{
1124 my $digest = Digest
::SHA-
>new('sha1');
1125 foreach my $rule (@$rules) { # order is important
1126 $digest->add($rule);
1128 return $digest->b64digest;
1131 sub ipset_chain_digest
{
1134 my $digest = Digest
::SHA-
>new('sha1');
1135 foreach my $rule (sort @$rules) { # note: sorted
1136 $digest->add($rule);
1138 return $digest->b64digest;
1141 sub ipset_get_chains
{
1149 return if $line =~ m/^#/;
1150 return if $line =~ m/^\s*$/;
1151 if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1153 $line =~ s/\s+$//; # delete trailing white space
1154 push @{$chains->{$chain}}, $line;
1156 # simply ignore the rest
1161 run_command
("/usr/sbin/ipset save", outfunc
=> $parser);
1163 # compute digest for each chain
1164 foreach my $chain (keys %$chains) {
1165 $res->{$chain} = ipset_chain_digest
($chains->{$chain});
1171 sub ruleset_generate_cmdstr
{
1172 my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1174 return if defined($rule->{enable
}) && !$rule->{enable
};
1176 die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1178 my $nbdport = defined($rule->{dport
}) ? parse_port_name_number_or_range
($rule->{dport
}) : 0;
1179 my $nbsport = defined($rule->{sport
}) ? parse_port_name_number_or_range
($rule->{sport
}) : 0;
1183 push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in
};
1184 push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out
};
1186 my $source = $rule->{source
};
1187 my $dest = $rule->{dest
};
1190 if ($source =~ m/^\+/) {
1191 if ($source =~ m/^\+(${security_group_name_pattern})$/) {
1192 die "no such ipset '$1'\n" if !$cluster_conf->{ipset
}->{$1};
1193 push @cmd, "-m set --match-set PVEFW-$1 src";
1195 die "invalid security group name '$source'\n";
1197 } elsif ($source =~ m/^${ip_alias_pattern}$/){
1198 my $alias = lc($source);
1199 my $e = $cluster_conf->{aliases
}->{$alias};
1200 die "no such alias $source\n" if !$e;
1201 push @cmd, "-s $e->{cidr}";
1202 } elsif ($source =~ m/\-/){
1203 push @cmd, "-m iprange --src-range $source";
1206 push @cmd, "-s $source";
1211 if ($dest =~ m/^\+/) {
1212 if ($dest =~ m/^\+(${security_group_name_pattern})$/) {
1213 die "no such ipset '$1'\n" if !$cluster_conf->{ipset
}->{$1};
1214 push @cmd, "-m set --match-set PVEFW-$1 dst";
1216 die "invalid security group name '$dest'\n";
1218 } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1219 my $alias = lc($dest);
1220 my $e = $cluster_conf->{aliases
}->{$alias};
1221 die "no such alias $dest" if !$e;
1222 push @cmd, "-d $e->{cidr}";
1223 } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1224 push @cmd, "-m iprange --dst-range $dest";
1227 push @cmd, "-d $dest";
1231 if ($rule->{proto
}) {
1232 push @cmd, "-p $rule->{proto}";
1235 $multiport++ if $nbdport > 1;
1236 $multiport++ if $nbsport > 1;
1238 push @cmd, "--match multiport" if $multiport;
1240 die "multiport: option '--sports' cannot be used together with '--dports'\n"
1241 if ($multiport == 2) && ($rule->{dport
} ne $rule->{sport
});
1243 if ($rule->{dport
}) {
1244 if ($rule->{proto
} && $rule->{proto
} eq 'icmp') {
1245 # Note: we use dport to store --icmp-type
1246 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport
}});
1247 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1250 if ($multiport == 2) {
1251 push @cmd, "--ports $rule->{dport}";
1253 push @cmd, "--dports $rule->{dport}";
1256 push @cmd, "--dport $rule->{dport}";
1261 if ($rule->{sport
}) {
1263 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1265 push @cmd, "--sport $rule->{sport}";
1268 } elsif ($rule->{dport
} || $rule->{sport
}) {
1269 warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport
};
1270 warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport
};
1273 push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype
};
1275 if (my $action = $rule->{action
}) {
1276 $action = $actions->{$action} if defined($actions->{$action});
1277 $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1278 push @cmd, $goto ?
"-g $action" : "-j $action";
1281 return scalar(@cmd) ?
join(' ', @cmd) : undef;
1284 sub ruleset_generate_rule
{
1285 my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1289 if ($rule->{macro}) {
1290 $rules = &$apply_macro($rule->{macro}, $rule);
1295 # update all or nothing
1298 foreach my $tmp (@$rules) {
1299 if (my $cmdstr = ruleset_generate_cmdstr
($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
1300 push @cmds, $cmdstr;
1304 foreach my $cmdstr (@cmds) {
1305 ruleset_addrule
($ruleset, $chain, $cmdstr);
1309 sub ruleset_generate_rule_insert
{
1310 my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1312 die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1314 if (my $cmdstr = ruleset_generate_cmdstr
($ruleset, $chain, $rule, $actions, $goto)) {
1315 ruleset_insertrule
($ruleset, $chain, $cmdstr);
1319 sub ruleset_create_chain
{
1320 my ($ruleset, $chain) = @_;
1322 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1323 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1325 die "chain '$chain' already exists\n" if $ruleset->{$chain};
1327 $ruleset->{$chain} = [];
1330 sub ruleset_chain_exist
{
1331 my ($ruleset, $chain) = @_;
1333 return $ruleset->{$chain} ?
1 : undef;
1336 sub ruleset_addrule
{
1337 my ($ruleset, $chain, $rule) = @_;
1339 die "no such chain '$chain'\n" if !$ruleset->{$chain};
1341 push @{$ruleset->{$chain}}, "-A $chain $rule";
1344 sub ruleset_insertrule
{
1345 my ($ruleset, $chain, $rule) = @_;
1347 die "no such chain '$chain'\n" if !$ruleset->{$chain};
1349 unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1352 sub get_log_rule_base
{
1353 my ($chain, $vmid, $msg, $loglevel) = @_;
1355 die "internal error - no log level" if !defined($loglevel);
1357 $vmid = 0 if !defined($vmid);
1359 # Note: we use special format for prefix to pass further
1360 # info to log daemon (VMID, LOGVELEL and CHAIN)
1362 return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1365 sub ruleset_addlog {
1366 my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1368 return if !defined($loglevel);
1370 my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1372 $logrule = "$rule $logrule" if defined($rule);
1374 ruleset_addrule($ruleset, $chain, $logrule);
1377 sub ruleset_add_chain_policy {
1378 my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1380 if ($policy eq 'ACCEPT') {
1382 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1383 { ACCEPT => $accept_action});
1385 } elsif ($policy eq 'DROP') {
1387 ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop
");
1389 ruleset_addlog($ruleset, $chain, $vmid, "policy
$policy: ", $loglevel);
1391 ruleset_addrule($ruleset, $chain, "-j DROP
");
1392 } elsif ($policy eq 'REJECT') {
1393 ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject
");
1395 ruleset_addlog($ruleset, $chain, $vmid, "policy
$policy: ", $loglevel);
1397 ruleset_addrule($ruleset, $chain, "-g PVEFW-reject
");
1400 die "internal error
: unknown policy
'$policy'";
1404 sub ruleset_chain_add_conn_filters {
1405 my ($ruleset, $chain, $accept) = @_;
1407 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
-j DROP
");
1408 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
-j
$accept");
1411 sub ruleset_chain_add_input_filters {
1412 my ($ruleset, $chain, $options, $cluster_conf, $loglevel) = @_;
1414 if ($cluster_conf->{ipset}->{blacklist}){
1415 ruleset_addlog($ruleset, $chain, 0, "DROP
: ", $loglevel, "-m set
--match-set PVEFW-blacklist src
");
1416 ruleset_addrule($ruleset, $chain, "-m set
--match-set PVEFW-blacklist src
-j DROP
");
1419 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1420 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
,NEW
-j PVEFW-smurfs
");
1423 if ($options->{tcpflags}) {
1424 ruleset_addrule($ruleset, $chain, "-p tcp
-j PVEFW-tcpflags
");
1428 sub ruleset_create_vm_chain {
1429 my ($ruleset, $chain, $options, $host_options, $macaddr, $direction) = @_;
1431 ruleset_create_chain($ruleset, $chain);
1432 my $accept = generate_nfqueue($options);
1434 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1435 if ($direction eq 'OUT') {
1436 ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1437 proto => 'udp', sport => 68, dport => 67 });
1439 ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1440 proto => 'udp', sport => 67, dport => 68 });
1444 if ($direction eq 'OUT') {
1445 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1446 ruleset_addrule($ruleset, $chain, "-m mac
! --mac-source
$macaddr -j DROP
");
1448 ruleset_addrule($ruleset, $chain, "-j MARK
--set-mark
0"); # clear mark
1452 sub ruleset_add_group_rule {
1453 my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action) = @_;
1455 my $group = $rule->{action};
1456 my $group_chain = "GROUP-
$group-$direction";
1457 if(!ruleset_chain_exist($ruleset, $group_chain)){
1458 generate_group_rules($ruleset, $cluster_conf, $group);
1461 if ($direction eq 'OUT' && $rule->{iface_out}) {
1462 ruleset_addrule($ruleset, $chain, "-o
$rule->{iface_out
} -j
$group_chain");
1463 } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1464 ruleset_addrule($ruleset, $chain, "-i
$rule->{iface_in
} -j
$group_chain");
1466 ruleset_addrule($ruleset, $chain, "-j
$group_chain");
1469 ruleset_addrule($ruleset, $chain, "-m mark
--mark
1 -j
$action");
1472 sub ruleset_generate_vm_rules {
1473 my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
1475 my $lc_direction = lc($direction);
1477 my $in_accept = generate_nfqueue($options);
1479 foreach my $rule (@$rules) {
1480 next if $rule->{iface} && $rule->{iface} ne $netid;
1481 next if !$rule->{enable};
1482 if ($rule->{type} eq 'group') {
1483 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1484 $direction eq 'OUT' ? 'RETURN' : $in_accept);
1486 next if $rule->{type} ne $lc_direction;
1488 if ($direction eq 'OUT') {
1489 ruleset_generate_rule($ruleset, $chain, $rule,
1490 { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" },
1491 undef, $cluster_conf);
1493 ruleset_generate_rule($ruleset, $chain, $rule,
1494 { ACCEPT => $in_accept , REJECT => "PVEFW-reject
" },
1495 undef, $cluster_conf);
1503 sub generate_nfqueue {
1506 if ($options->{ips}) {
1507 my $action = "NFQUEUE
";
1508 if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1509 if (defined($3) && defined($1)) {
1510 $action .= " --queue-balance
$1:$3";
1511 } elsif (defined($1)) {
1512 $action .= " --queue-num
$1";
1515 $action .= " --queue-bypass
" if $feature_ipset_nomatch; #need kernel 3.10
1522 sub ruleset_generate_vm_ipsrules {
1523 my ($ruleset, $options, $direction, $iface) = @_;
1525 if ($options->{ips} && $direction eq 'IN') {
1526 my $nfqueue = generate_nfqueue($options);
1528 if (!ruleset_chain_exist($ruleset, "PVEFW-IPS
")) {
1529 ruleset_create_chain($ruleset, "PVEFW-IPS
");
1532 ruleset_addrule($ruleset, "PVEFW-IPS
", "-m physdev
--physdev-out
$iface --physdev-is-bridged
-j
$nfqueue");
1536 sub generate_venet_rules_direction {
1537 my ($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1539 my $lc_direction = lc($direction);
1541 my $rules = $vmfw_conf->{rules};
1543 my $options = $vmfw_conf->{options};
1544 my $hostfw_options = $vmfw_conf->{options};
1545 my $loglevel = get_option_log_level($options, "log_level_
${lc_direction
}");
1547 my $chain = "venet0-
$vmid-$direction";
1549 ruleset_create_vm_chain($ruleset, $chain, $options, $hostfw_options, undef, $direction);
1551 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
1556 if ($direction eq 'OUT') {
1557 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1559 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1562 my $accept = generate_nfqueue($options);
1563 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : $accept;
1564 ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1566 if ($direction eq 'OUT') {
1567 ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT
", {
1570 iface_in => 'venet0'});
1572 ruleset_generate_rule($ruleset, "PVEFW-VENET-IN
", {
1575 iface_out => 'venet0'});
1579 sub generate_tap_rules_direction {
1580 my ($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction) = @_;
1582 my $lc_direction = lc($direction);
1584 my $rules = $vmfw_conf->{rules};
1586 my $options = $vmfw_conf->{options};
1587 my $hostfw_options = $hostfw_conf->{options};
1588 my $loglevel = get_option_log_level($options, "log_level_
${lc_direction
}");
1590 my $tapchain = "$iface-$direction";
1592 ruleset_create_vm_chain($ruleset, $tapchain, $options, $hostfw_options, $macaddr, $direction);
1594 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
1596 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
1601 if ($direction eq 'OUT') {
1602 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1604 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1607 my $accept = generate_nfqueue($options);
1608 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : $accept;
1609 ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1611 # plug the tap chain to bridge chain
1612 if ($direction eq 'IN') {
1613 ruleset_addrule($ruleset, "PVEFW-FWBR-IN
",
1614 "-m physdev
--physdev-is-bridged
--physdev-out
$iface -j
$tapchain");
1616 ruleset_addrule($ruleset, "PVEFW-FWBR-OUT
",
1617 "-m physdev
--physdev-is-bridged
--physdev-in
$iface -j
$tapchain");
1621 sub enable_host_firewall {
1622 my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1624 my $options = $hostfw_conf->{options};
1625 my $cluster_options = $cluster_conf->{options};
1626 my $rules = $hostfw_conf->{rules};
1627 my $cluster_rules = $cluster_conf->{rules};
1629 # host inbound firewall
1630 my $chain = "PVEFW-HOST-IN
";
1631 ruleset_create_chain($ruleset, $chain);
1633 my $loglevel = get_option_log_level($options, "log_level_in
");
1635 ruleset_addrule($ruleset, $chain, "-i lo
-j ACCEPT
");
1637 ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1638 ruleset_chain_add_input_filters($ruleset, $chain, $options, $cluster_conf, $loglevel);
1640 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
-j ACCEPT
");
1641 ruleset_addrule($ruleset, $chain, "-p udp
-m conntrack
--ctstate NEW
--dport
5404:5405 -j ACCEPT
");
1642 ruleset_addrule($ruleset, $chain, "-p udp
-m udp
--dport
9000 -j ACCEPT
"); #corosync
1644 # we use RETURN because we need to check also tap rules
1645 my $accept_action = 'RETURN';
1647 # add host rules first, so that cluster wide rules can be overwritten
1648 foreach my $rule (@$rules, @$cluster_rules) {
1649 $rule->{iface_in} = $rule->{iface} if $rule->{iface};
1650 if ($rule->{type} eq 'group') {
1651 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action);
1652 } elsif ($rule->{type} eq 'in') {
1653 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" },
1654 undef, $cluster_conf);
1656 delete $rule->{iface_in};
1659 # implement input policy
1660 my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1661 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1663 # host outbound firewall
1664 $chain = "PVEFW-HOST-OUT
";
1665 ruleset_create_chain($ruleset, $chain);
1667 $loglevel = get_option_log_level($options, "log_level_out
");
1669 ruleset_addrule($ruleset, $chain, "-o lo
-j ACCEPT
");
1671 ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1673 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
-j ACCEPT
");
1674 ruleset_addrule($ruleset, $chain, "-p udp
-m conntrack
--ctstate NEW
--dport
5404:5405 -j ACCEPT
");
1675 ruleset_addrule($ruleset, $chain, "-p udp
-m udp
--dport
9000 -j ACCEPT
"); #corosync
1677 # we use RETURN because we may want to check other thigs later
1678 $accept_action = 'RETURN';
1680 # add host rules first, so that cluster wide rules can be overwritten
1681 foreach my $rule (@$rules, @$cluster_rules) {
1682 $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1683 if ($rule->{type} eq 'group') {
1684 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action);
1685 } elsif ($rule->{type} eq 'out') {
1686 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" },
1687 undef, $cluster_conf);
1689 delete $rule->{iface_out};
1692 # implement output policy
1693 $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
1694 ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1696 ruleset_addrule($ruleset, "PVEFW-OUTPUT
", "-j PVEFW-HOST-OUT
");
1697 ruleset_addrule($ruleset, "PVEFW-INPUT
", "-j PVEFW-HOST-IN
");
1700 sub generate_group_rules {
1701 my ($ruleset, $cluster_conf, $group) = @_;
1703 my $rules = $cluster_conf->{groups}->{$group};
1706 warn "no such security group
'$group'\n";
1707 $rules = []; # create empty chain
1710 my $chain = "GROUP-
${group
}-IN
";
1712 ruleset_create_chain($ruleset, $chain);
1713 ruleset_addrule($ruleset, $chain, "-j MARK
--set-mark
0"); # clear mark
1715 foreach my $rule (@$rules) {
1716 next if $rule->{type} ne 'in';
1717 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" }, undef, $cluster_conf);
1720 $chain = "GROUP-
${group
}-OUT
";
1722 ruleset_create_chain($ruleset, $chain);
1723 ruleset_addrule($ruleset, $chain, "-j MARK
--set-mark
0"); # clear mark
1725 foreach my $rule (@$rules) {
1726 next if $rule->{type} ne 'out';
1727 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1728 # check also other tap rules later
1729 ruleset_generate_rule($ruleset, $chain, $rule,
1730 { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject
" }, undef, $cluster_conf);
1735 my $valid_netdev_names = {};
1736 for (my $i = 0; $i < $MAX_NETS; $i++) {
1737 $valid_netdev_names->{"net
$i"} = 1;
1741 my ($line, $allow_iface, $allow_groups) = @_;
1743 my ($type, $action, $macro, $iface, $source, $dest, $proto, $dport, $sport);
1747 # we can add single line comments to the end of the rule
1748 my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
1750 # we can disable a rule when prefixed with '|'
1753 $enable = 0 if $line =~ s/^\|//;
1755 $line =~ s/^(\S+)\s+(\S+)\s*// ||
1756 die "unable to parse rule
: $line\n";
1761 if ($type eq 'in' || $type eq 'out') {
1762 if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1764 } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1766 my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1767 die "unknown
macro '$1'\n" if !$preferred_name;
1768 $macro = $preferred_name;
1770 die "unknown action
'$action'\n";
1772 } elsif ($type eq 'group') {
1773 die "groups disabled
\n" if !$allow_groups;
1774 die "invalid characters
in group name
\n" if $action !~ m/^${security_group_name_pattern}$/;
1776 die "unknown rule type
'$type'\n";
1779 while (length($line)) {
1780 if ($line =~ s/^-i (\S+)\s*//) {
1781 die "parameter
-i
not allowed
\n" if !$allow_iface;
1783 PVE::JSONSchema::pve_verify_iface($iface);
1787 last if $type eq 'group';
1789 if ($line =~ s/^-p (\S+)\s*//) {
1791 pve_fw_verify_protocol_spec($proto);
1794 if ($line =~ s/^-dport (\S+)\s*//) {
1796 parse_port_name_number_or_range($dport);
1799 if ($line =~ s/^-sport (\S+)\s*//) {
1801 parse_port_name_number_or_range($sport);
1804 if ($line =~ s/^-source (\S+)\s*//) {
1806 parse_address_list($source);
1809 if ($line =~ s/^-dest (\S+)\s*//) {
1811 parse_address_list($dest);
1818 die "unable to parse rule parameters
: $line\n" if length($line);
1823 comment => $comment,
1835 sub parse_vmfw_option {
1840 my $loglevels = "emerg
|alert
|crit
|err
|warning
|notice
|info
|debug
|nolog
";
1842 if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
1845 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1847 $value = $2 ? lc($3) : '';
1848 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1851 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1856 die "can
't parse option '$line'\n"
1859 return ($opt, $value);
1862 sub parse_hostfw_option {
1867 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1869 if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
1872 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1874 $value = $2 ? lc($3) : '';
1875 } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
1880 die "can't parse option
'$line'\n"
1883 return ($opt, $value);
1886 sub parse_clusterfw_option {
1891 if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1894 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1899 die "can
't parse option '$line'\n"
1902 return ($opt, $value);
1905 sub parse_clusterfw_alias {
1908 # we can add single line comments to the end of the line
1909 my $comment = decode('utf8
', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
1911 if ($line =~ m/^(\S+)\s(\S+)$/) {
1912 my ($name, $cidr) = ($1, $2);
1914 pve_verify_ipv4_or_cidr($cidr);
1919 $data->{comment} = $comment if $comment;
1926 sub parse_vm_fw_rules {
1927 my ($filename, $fh) = @_;
1929 my $res = { rules => [], options => {}};
1933 while (defined(my $line = <$fh>)) {
1934 next if $line =~ m/^#/;
1935 next if $line =~ m/^\s*$/;
1937 my $linenr = $fh->input_line_number();
1938 my $prefix = "$filename (line $linenr)";
1940 if ($line =~ m/^\[(\S+)\]\s*$/i) {
1942 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1946 warn "$prefix: skip line - no section";
1950 next if !$res->{$section}; # skip undefined section
1952 if ($section eq 'options
') {
1954 my ($opt, $value) = parse_vmfw_option($line);
1955 $res->{options}->{$opt} = $value;
1957 warn "$prefix: $@" if $@;
1962 eval { $rule = parse_fw_rule($line, 1, 1); };
1964 warn "$prefix: $err";
1968 push @{$res->{$section}}, $rule;
1974 sub parse_host_fw_rules {
1975 my ($filename, $fh) = @_;
1977 my $res = { rules => [], options => {}};
1981 while (defined(my $line = <$fh>)) {
1982 next if $line =~ m/^#/;
1983 next if $line =~ m/^\s*$/;
1985 my $linenr = $fh->input_line_number();
1986 my $prefix = "$filename (line $linenr)";
1988 if ($line =~ m/^\[(\S+)\]\s*$/i) {
1990 warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1994 warn "$prefix: skip line - no section";
1998 next if !$res->{$section}; # skip undefined section
2000 if ($section eq 'options
') {
2002 my ($opt, $value) = parse_hostfw_option($line);
2003 $res->{options}->{$opt} = $value;
2005 warn "$prefix: $@" if $@;
2010 eval { $rule = parse_fw_rule($line, 1, 1); };
2012 warn "$prefix: $err";
2016 push @{$res->{$section}}, $rule;
2022 sub parse_cluster_fw_rules {
2023 my ($filename, $fh) = @_;
2033 group_comments => {},
2035 ipset_comments => {},
2038 while (defined(my $line = <$fh>)) {
2039 next if $line =~ m/^#/;
2040 next if $line =~ m/^\s*$/;
2042 my $linenr = $fh->input_line_number();
2043 my $prefix = "$filename (line $linenr)";
2045 if ($line =~ m/^\[options\]$/i) {
2046 $section = 'options
';
2050 if ($line =~ m/^\[aliases\]$/i) {
2051 $section = 'aliases
';
2055 if ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2056 $section = 'groups
';
2059 $res->{$section}->{$group} = [];
2060 $res->{group_comments}->{$group} = decode('utf8
', $comment)
2065 if ($line =~ m/^\[rules\]$/i) {
2070 if ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2074 $res->{$section}->{$group} = [];
2075 $res->{ipset_comments}->{$group} = decode('utf8
', $comment)
2081 warn "$prefix: skip line - no section\n";
2085 if ($section eq 'options
') {
2087 my ($opt, $value) = parse_clusterfw_option($line);
2088 $res->{options}->{$opt} = $value;
2090 warn "$prefix: $@" if $@;
2091 } elsif ($section eq 'aliases
') {
2093 my $data = parse_clusterfw_alias($line);
2094 $res->{aliases}->{lc($data->{name})} = $data;
2096 warn "$prefix: $@" if $@;
2097 } elsif ($section eq 'rules
') {
2099 eval { $rule = parse_fw_rule($line, 1, 1); };
2101 warn "$prefix: $err";
2104 push @{$res->{$section}}, $rule;
2105 } elsif ($section eq 'groups
') {
2107 eval { $rule = parse_fw_rule($line, 0, 0); };
2109 warn "$prefix: $err";
2112 push @{$res->{$section}->{$group}}, $rule;
2113 } elsif ($section eq 'ipset
') {
2114 # we can add single line comments to the end of the rule
2115 my $comment = decode('utf8
', $1) if $line =~ s/#\s*(.*?)\s*$//;
2117 $line =~ m/^(\!)?\s*(\S+)\s*$/;
2121 if($cidr !~ m/^${ip_alias_pattern}$/) {
2124 eval { pve_verify_ipv4_or_cidr($cidr); };
2126 warn "$prefix: $cidr - $err";
2131 my $entry = { cidr => $cidr };
2132 $entry->{nomatch} = 1 if $nomatch;
2133 $entry->{comment} = $comment if $comment;
2135 push @{$res->{$section}->{$group}}, $entry;
2143 my ($code, @param) = @_;
2147 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2154 sub read_local_vm_config {
2159 my $vmdata = { openvz => $openvz, qemu => $qemu };
2161 my $vmlist = PVE::Cluster::get_vmlist();
2162 return $vmdata if !$vmlist || !$vmlist->{ids};
2163 my $ids = $vmlist->{ids};
2165 foreach my $vmid (keys %$ids) {
2166 next if !$vmid; # skip VE0
2167 my $d = $ids->{$vmid};
2168 next if !$d->{node} || $d->{node} ne $nodename;
2169 next if !$d->{type};
2170 if ($d->{type} eq 'openvz
') {
2171 if ($have_pve_manager) {
2172 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2173 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2174 $openvz->{$vmid} = $conf;
2177 } elsif ($d->{type} eq 'qemu
') {
2178 if ($have_qemu_server) {
2179 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2180 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2181 $qemu->{$vmid} = $conf;
2190 sub load_vmfw_conf {
2191 my ($vmid, $dir) = @_;
2195 $dir = "/etc/pve/firewall" if !defined($dir);
2197 my $filename = "$dir/$vmid.fw";
2198 if (my $fh = IO::File->new($filename, O_RDONLY)) {
2199 $vmfw_conf = parse_vm_fw_rules($filename, $fh);
2205 my $format_rules = sub {
2206 my ($rules, $allow_iface) = @_;
2210 foreach my $rule (@$rules) {
2211 if ($rule->{type} eq 'in' || $rule->{type} eq 'out
' || $rule->{type} eq 'group
') {
2212 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2213 $raw .= uc($rule->{type});
2214 if ($rule->{macro}) {
2215 $raw .= " $rule->{macro}($rule->{action})";
2217 $raw .= " " . $rule->{action};
2219 if ($allow_iface && $rule->{iface}) {
2220 $raw .= " -i $rule->{iface}";
2223 if ($rule->{type} ne 'group
') {
2224 $raw .= " -source $rule->{source}" if $rule->{source};
2225 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2226 $raw .= " -p $rule->{proto}" if $rule->{proto};
2227 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2228 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2231 $raw .= " # " . encode('utf8
', $rule->{comment})
2232 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2235 die "unknown rule type '$rule->{type
}'";
2242 my $format_options = sub {
2247 $raw .= "[OPTIONS]\n\n";
2248 foreach my $opt (keys %$options) {
2249 $raw .= "$opt: $options->{$opt}\n";
2256 my $format_aliases = sub {
2261 $raw .= "[ALIASES]\n\n";
2262 foreach my $k (keys %$aliases) {
2263 my $e = $aliases->{$k};
2264 $raw .= "$e->{name} $e->{cidr}";
2265 $raw .= " # " . encode('utf8
', $e->{comment})
2266 if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2274 my $format_ipset = sub {
2280 foreach my $entry (@$options) {
2281 $nethash->{$entry->{cidr}} = $entry;
2284 foreach my $cidr (sort keys %$nethash) {
2285 my $entry = $nethash->{$cidr};
2286 my $line = $entry->{nomatch} ? '!' : '';
2287 $line .= $entry->{cidr};
2288 $line .= " # " . encode('utf8
', $entry->{comment})
2289 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2296 sub save_vmfw_conf {
2297 my ($vmid, $vmfw_conf) = @_;
2301 my $options = $vmfw_conf->{options};
2302 $raw .= &$format_options($options) if scalar(keys %$options);
2304 my $rules = $vmfw_conf->{rules} || [];
2305 if (scalar(@$rules)) {
2306 $raw .= "[RULES]\n\n";
2307 $raw .= &$format_rules($rules, 1);
2311 my $filename = "/etc/pve/firewall/$vmid.fw";
2312 PVE::Tools::file_set_contents($filename, $raw);
2315 sub read_vm_firewall_configs {
2316 my ($vmdata, $dir) = @_;
2318 my $vmfw_configs = {};
2320 foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
2321 my $vmfw_conf = load_vmfw_conf($vmid, $dir);
2322 next if !$vmfw_conf->{options}; # skip if file does not exists
2323 $vmfw_configs->{$vmid} = $vmfw_conf;
2326 return $vmfw_configs;
2329 sub get_option_log_level {
2330 my ($options, $k) = @_;
2332 my $v = $options->{$k};
2333 $v = $default_log_level if !defined($v);
2335 return undef if $v eq '' || $v eq 'nolog
';
2337 $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2339 return $v if ($v >= 0) && ($v <= 7);
2341 warn "unknown log level ($k = '$v')\n";
2346 sub generate_std_chains {
2347 my ($ruleset, $options) = @_;
2349 my $loglevel = get_option_log_level($options, 'smurf_log_level
');
2351 # same as shorewall smurflog.
2352 my $chain = 'PVEFW-smurflog
';
2353 $pve_std_chains->{$chain} = [];
2355 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2356 push @{$pve_std_chains->{$chain}}, "-j DROP";
2358 # same as shorewall logflags action.
2359 $loglevel = get_option_log_level($options, 'tcp_flags_log_level
');
2360 $chain = 'PVEFW-logflags
';
2361 $pve_std_chains->{$chain} = [];
2363 # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2364 push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2365 push @{$pve_std_chains->{$chain}}, "-j DROP";
2367 foreach my $chain (keys %$pve_std_chains) {
2368 ruleset_create_chain($ruleset, $chain);
2369 foreach my $rule (@{$pve_std_chains->{$chain}}) {
2371 ruleset_generate_rule($ruleset, $chain, $rule);
2373 ruleset_addrule($ruleset, $chain, $rule);
2379 sub generate_ipset_chains {
2380 my ($ipset_ruleset, $fw_conf) = @_;
2382 foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2383 generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset}, $fw_conf->{aliases});
2387 sub generate_ipset {
2388 my ($ipset_ruleset, $name, $options, $aliases) = @_;
2390 my $hashsize = scalar(@$options);
2391 if ($hashsize <= 64) {
2394 $hashsize = round_powerof2($hashsize);
2397 push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
2401 foreach my $entry (@$options) {
2402 my $cidr = $entry->{cidr};
2403 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2404 my $alias = lc($cidr);
2405 if ($aliases->{$alias}) {
2406 $entry->{cidr} = $aliases->{$alias}->{cidr};
2407 $nethash->{$entry->{cidr}} = $entry;
2409 warn "no such alias '$cidr'\n" if !$aliases->{$alias};
2412 $nethash->{$entry->{cidr}} = $entry;
2416 foreach my $cidr (sort keys %$nethash) {
2417 my $entry = $nethash->{$cidr};
2419 my $cmd = "add $name $cidr";
2420 if ($entry->{nomatch}) {
2421 if ($feature_ipset_nomatch) {
2422 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2424 warn "ignore !$cidr - nomatch not supported by kernel\n";
2427 push @{$ipset_ruleset->{$name}}, $cmd;
2432 sub round_powerof2 {
2436 $int |= $int >> $_ foreach (1,2,4,8,16);
2440 sub load_clusterfw_conf {
2441 my ($filename) = @_;
2443 $filename = $clusterfw_conf_filename if !defined($filename);
2445 my $cluster_conf = {};
2446 if (my $fh = IO::File->new($filename, O_RDONLY)) {
2447 $cluster_conf = parse_cluster_fw_rules($filename, $fh);
2450 return $cluster_conf;
2453 sub save_clusterfw_conf {
2454 my ($cluster_conf) = @_;
2458 my $options = $cluster_conf->{options};
2459 $raw .= &$format_options($options) if scalar(keys %$options);
2461 my $aliases = $cluster_conf->{aliases};
2462 $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
2464 foreach my $ipset (sort keys %{$cluster_conf->{ipset}}) {
2465 if (my $comment = $cluster_conf->{ipset_comments}->{$ipset}) {
2466 my $utf8comment = encode('utf8
', $comment);
2467 $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2469 $raw .= "[IPSET $ipset]\n\n";
2471 my $options = $cluster_conf->{ipset}->{$ipset};
2472 $raw .= &$format_ipset($options);
2476 my $rules = $cluster_conf->{rules};
2477 if (scalar(@$rules)) {
2478 $raw .= "[RULES]\n\n";
2479 $raw .= &$format_rules($rules, 1);
2483 foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2484 my $rules = $cluster_conf->{groups}->{$group};
2485 if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2486 my $utf8comment = encode('utf8
', $comment);
2487 $raw .= "[group $group] # $utf8comment\n\n";
2489 $raw .= "[group $group]\n\n";
2492 $raw .= &$format_rules($rules, 0);
2496 PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2499 sub load_hostfw_conf {
2500 my ($filename) = @_;
2502 $filename = $hostfw_conf_filename if !defined($filename);
2504 my $hostfw_conf = {};
2505 if (my $fh = IO::File->new($filename, O_RDONLY)) {
2506 $hostfw_conf = parse_host_fw_rules($filename, $fh);
2508 return $hostfw_conf;
2511 sub save_hostfw_conf {
2512 my ($hostfw_conf) = @_;
2516 my $options = $hostfw_conf->{options};
2517 $raw .= &$format_options($options) if scalar(keys %$options);
2519 my $rules = $hostfw_conf->{rules};
2520 if (scalar(@$rules)) {
2521 $raw .= "[RULES]\n\n";
2522 $raw .= &$format_rules($rules, 1);
2526 PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2530 my ($cluster_conf, $hostfw_conf, $vmdata) = @_;
2534 if ($vmdata) { # test mode
2535 my $testdir = $vmdata->{testdir} || die "no test directory specified";
2536 my $filename = "$testdir/cluster.fw";
2537 die "missing test file '$filename'\n" if ! -f $filename;
2538 $cluster_conf = load_clusterfw_conf($filename);
2540 $filename = "$testdir/host.fw";
2541 die "missing test file '$filename'\n" if ! -f $filename;
2542 $hostfw_conf = load_hostfw_conf($filename);
2544 $vmfw_configs = read_vm_firewall_configs($vmdata, $testdir);
2545 } else { # normal operation
2546 $cluster_conf = load_clusterfw_conf() if !$cluster_conf;
2548 $hostfw_conf = load_hostfw_conf() if !$hostfw_conf;
2550 $vmdata = read_local_vm_config();
2551 $vmfw_configs = read_vm_firewall_configs($vmdata);
2555 $cluster_conf->{ipset}->{venet0} = [];
2559 ruleset_create_chain($ruleset, "PVEFW-INPUT");
2560 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2562 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2564 my $hostfw_options = $hostfw_conf->{options} || {};
2566 # fixme: what log level should we use here?
2567 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2569 ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
2571 ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
2572 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set PVEFW-venet0 src -j PVEFW-VENET-OUT");
2573 ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set PVEFW-venet0 src -j PVEFW-VENET-OUT");
2575 ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
2576 ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options, $cluster_conf, $loglevel);
2578 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
2580 ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
2581 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
2583 ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
2584 ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options, $cluster_conf, $loglevel);
2586 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set PVEFW-venet0 dst -j PVEFW-VENET-IN");
2588 generate_std_chains($ruleset, $hostfw_options);
2590 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2592 enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
2594 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set PVEFW-venet0 dst -j PVEFW-VENET-IN");
2596 # generate firewall rules for QEMU VMs
2597 foreach my $vmid (keys %{$vmdata->{qemu}}) {
2598 my $conf = $vmdata->{qemu}->{$vmid};
2599 my $vmfw_conf = $vmfw_configs->{$vmid};
2600 next if !$vmfw_conf;
2601 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2603 foreach my $netid (keys %$conf) {
2604 next if $netid !~ m/^net(\d+)$/;
2605 my $net = PVE::QemuServer::parse_net($conf->{$netid});
2606 next if !$net->{firewall};
2607 my $iface = "tap${vmid}i$1";
2609 my $macaddr = $net->{macaddr};
2610 generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2611 $vmfw_conf, $vmid, 'IN
');
2612 generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2613 $vmfw_conf, $vmid, 'OUT
');
2617 # generate firewall rules for OpenVZ containers
2618 foreach my $vmid (keys %{$vmdata->{openvz}}) {
2619 my $conf = $vmdata->{openvz}->{$vmid};
2621 my $vmfw_conf = $vmfw_configs->{$vmid};
2622 next if !$vmfw_conf;
2623 next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2625 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2626 my $ip = $conf->{ip_address}->{value};
2628 parse_address_list($ip); # make sure we have a valid $ip list
2630 my @ips = split(',', $ip);
2632 foreach my $singleip (@ips) {
2633 my $venet0ipset = {};
2634 $venet0ipset->{cidr} = $singleip;
2635 push @{$cluster_conf->{ipset}->{venet0}}, $venet0ipset;
2638 generate_venet_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, 'IN
');
2639 generate_venet_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, 'OUT
');
2642 if ($conf->{netif} && $conf->{netif}->{value}) {
2643 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2644 foreach my $netid (keys %$netif) {
2645 my $d = $netif->{$netid};
2647 my $macaddr = $d->{mac};
2648 my $iface = $d->{host_ifname};
2649 generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2650 $vmfw_conf, $vmid, 'IN
');
2651 generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2652 $vmfw_conf, $vmid, 'OUT
');
2657 if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
2658 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
2661 my $ipset_ruleset = {};
2662 generate_ipset_chains($ipset_ruleset, $cluster_conf);
2664 return ($ruleset, $ipset_ruleset);
2667 sub get_ruleset_status {
2668 my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2670 my $statushash = {};
2672 foreach my $chain (sort keys %$ruleset) {
2673 my $sig = &$digest_fn($ruleset->{$chain});
2675 $statushash->{$chain}->{sig} = $sig;
2677 my $oldsig = $active_chains->{$chain};
2678 if (!defined($oldsig)) {
2679 $statushash->{$chain}->{action} = 'create
';
2681 if ($oldsig eq $sig) {
2682 $statushash->{$chain}->{action} = 'exists';
2684 $statushash->{$chain}->{action} = 'update
';
2687 print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2688 foreach my $cmd (@{$ruleset->{$chain}}) {
2689 print "\t$cmd\n" if $verbose;
2693 foreach my $chain (sort keys %$active_chains) {
2694 if (!defined($ruleset->{$chain})) {
2695 my $sig = $active_chains->{$chain};
2696 $statushash->{$chain}->{action} = 'delete';
2697 $statushash->{$chain}->{sig} = $sig;
2698 print "delete $chain ($sig)\n" if $verbose;
2705 sub print_sig_rule {
2706 my ($chain, $sig) = @_;
2708 # We just use this to store a SHA1 checksum used to detect changes
2709 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2712 sub get_ruleset_cmdlist {
2713 my ($ruleset, $verbose) = @_;
2715 my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2717 my ($active_chains, $hooks) = iptables_get_chains();
2718 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2720 # create missing chains first
2721 foreach my $chain (sort keys %$ruleset) {
2722 my $stat = $statushash->{$chain};
2723 die "internal error" if !$stat;
2724 next if $stat->{action} ne 'create
';
2726 $cmdlist .= ":$chain - [0:0]\n";
2729 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2730 if (!$hooks->{$h}) {
2731 $cmdlist .= "-A $h -j PVEFW-$h\n";
2735 foreach my $chain (sort keys %$ruleset) {
2736 my $stat = $statushash->{$chain};
2737 die "internal error" if !$stat;
2739 if ($stat->{action
} eq 'update' || $stat->{action
} eq 'create') {
2740 $cmdlist .= "-F $chain\n";
2741 foreach my $cmd (@{$ruleset->{$chain}}) {
2742 $cmdlist .= "$cmd\n";
2744 $cmdlist .= print_sig_rule
($chain, $stat->{sig
});
2745 } elsif ($stat->{action
} eq 'delete') {
2746 die "internal error"; # this should not happen
2747 } elsif ($stat->{action
} eq 'exists') {
2750 die "internal error - unknown status '$stat->{action}'";
2754 foreach my $chain (keys %$statushash) {
2755 next if $statushash->{$chain}->{action
} ne 'delete';
2756 $cmdlist .= "-F $chain\n";
2758 foreach my $chain (keys %$statushash) {
2759 next if $statushash->{$chain}->{action
} ne 'delete';
2760 next if $chain eq 'PVEFW-INPUT';
2761 next if $chain eq 'PVEFW-OUTPUT';
2762 next if $chain eq 'PVEFW-FORWARD';
2763 $cmdlist .= "-X $chain\n";
2766 my $changes = $cmdlist ne "*filter\n" ?
1 : 0;
2768 $cmdlist .= "COMMIT\n";
2770 return wantarray ?
($cmdlist, $changes) : $cmdlist;
2773 sub get_ipset_cmdlist
{
2774 my ($ruleset, $verbose) = @_;
2778 my $delete_cmdlist = "";
2780 my $active_chains = ipset_get_chains
();
2781 my $statushash = get_ruleset_status
($ruleset, $active_chains, \
&ipset_chain_digest
, $verbose);
2783 # remove stale _swap chains
2784 foreach my $chain (keys %$active_chains) {
2785 if ($chain =~ m/^PVEFW-\S+_swap$/) {
2786 $cmdlist .= "destroy $chain\n";
2790 foreach my $chain (sort keys %$ruleset) {
2791 my $stat = $statushash->{$chain};
2792 die "internal error" if !$stat;
2794 if ($stat->{action
} eq 'create') {
2795 foreach my $cmd (@{$ruleset->{$chain}}) {
2796 $cmdlist .= "$cmd\n";
2800 if ($stat->{action
} eq 'update') {
2801 my $chain_swap = $chain."_swap";
2803 foreach my $cmd (@{$ruleset->{$chain}}) {
2804 $cmd =~ s/$chain/$chain_swap/;
2805 $cmdlist .= "$cmd\n";
2807 $cmdlist .= "swap $chain_swap $chain\n";
2808 $cmdlist .= "flush $chain_swap\n";
2809 $cmdlist .= "destroy $chain_swap\n";
2814 foreach my $chain (keys %$statushash) {
2815 next if $statushash->{$chain}->{action
} ne 'delete';
2817 $delete_cmdlist .= "flush $chain\n";
2818 $delete_cmdlist .= "destroy $chain\n";
2821 my $changes = ($cmdlist || $delete_cmdlist) ?
1 : 0;
2823 return ($cmdlist, $delete_cmdlist, $changes);
2827 my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
2829 enable_bridge_firewall
();
2831 my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
2832 get_ipset_cmdlist
($ipset_ruleset, undef, $verbose);
2834 my ($cmdlist, $changes) = get_ruleset_cmdlist
($ruleset, $verbose);
2837 if ($ipset_changes) {
2838 print "ipset changes:\n";
2839 print $ipset_create_cmdlist if $ipset_create_cmdlist;
2840 print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2844 print "iptables changes:\n";
2849 ipset_restore_cmdlist
($ipset_create_cmdlist);
2851 iptables_restore_cmdlist
($cmdlist);
2853 ipset_restore_cmdlist
($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2855 # test: re-read status and check if everything is up to date
2856 my $active_chains = iptables_get_chains
();
2857 my $statushash = get_ruleset_status
($ruleset, $active_chains, \
&iptables_chain_digest
, 0);
2860 foreach my $chain (sort keys %$ruleset) {
2861 my $stat = $statushash->{$chain};
2862 if ($stat->{action
} ne 'exists') {
2863 warn "unable to update chain '$chain'\n";
2868 die "unable to apply firewall changes\n" if $errors;
2870 update_nf_conntrack_max
($hostfw_conf);
2872 update_nf_conntrack_tcp_timeout_established
($hostfw_conf);
2876 sub update_nf_conntrack_max
{
2877 my ($hostfw_conf) = @_;
2879 my $max = 65536; # reasonable default
2881 my $options = $hostfw_conf->{options
} || {};
2883 if (defined($options->{nf_conntrack_max
}) && ($options->{nf_conntrack_max
} > $max)) {
2884 $max = $options->{nf_conntrack_max
};
2885 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2888 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2889 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2891 my $current = int(PVE
::Tools
::file_read_firstline
($filename_nf_conntrack_max) || $max);
2893 if ($current != $max) {
2894 my $hashsize = int($max/4);
2895 PVE
::ProcFSTools
::write_proc_entry
($filename_hashsize, $hashsize);
2896 PVE
::ProcFSTools
::write_proc_entry
($filename_nf_conntrack_max, $max);
2900 sub update_nf_conntrack_tcp_timeout_established
{
2901 my ($hostfw_conf) = @_;
2903 my $options = $hostfw_conf->{options
} || {};
2905 my $value = defined($options->{nf_conntrack_tcp_timeout_established
}) ?
$options->{nf_conntrack_tcp_timeout_established
} : 432000;
2907 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
2910 sub remove_pvefw_chains
{
2912 my ($chash, $hooks) = iptables_get_chains
();
2913 my $cmdlist = "*filter\n";
2915 foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2917 $cmdlist .= "-D $h -j PVEFW-$h\n";
2921 foreach my $chain (keys %$chash) {
2922 $cmdlist .= "-F $chain\n";
2925 foreach my $chain (keys %$chash) {
2926 $cmdlist .= "-X $chain\n";
2928 $cmdlist .= "COMMIT\n";
2930 iptables_restore_cmdlist
($cmdlist);
2938 my $cluster_conf = load_clusterfw_conf
();
2939 my $cluster_options = $cluster_conf->{options
};
2941 my $enable = $cluster_options->{enable
};
2943 die "Firewall is disabled - cannot start\n" if !$enable;
2946 PVE
::Firewall
::remove_pvefw_chains
();
2947 print "Firewall disabled\n" if $verbose;
2951 my $hostfw_conf = load_hostfw_conf
();
2953 my ($ruleset, $ipset_ruleset) = compile
($cluster_conf, $hostfw_conf);
2955 apply_ruleset
($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);