13 use Socket
qw(AF_INET AF_INET6 inet_ntop inet_pton);
14 use Storable
qw(dclone);
18 use PVE
::Exception
qw(raise raise_param_exc);
20 use PVE
::JSONSchema
qw(register_standard_option get_standard_option);
24 use PVE
::Tools
qw($IPV4RE $IPV6RE);
25 use PVE
::Tools
qw(run_command lock_file dir_glob_foreach);
27 use PVE
::Firewall
::Helpers
;
29 my $pvefw_conf_dir = "/etc/pve/firewall";
30 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
32 # dynamically include PVE::QemuServer and PVE::LXC
33 # to avoid dependency problems
36 require PVE
::QemuServer
;
37 require PVE
::QemuConfig
;
38 $have_qemu_server = 1;
47 my $pve_fw_status_dir = "/var/lib/pve-firewall";
49 mkdir $pve_fw_status_dir; # make sure this exists
51 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
52 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
53 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
55 my $max_alias_name_length = 64;
56 my $max_ipset_name_length = 64;
57 my $max_group_name_length = 18;
59 my $PROTOCOLS_WITH_PORTS = {
61 udplite
=> 1, 136 => 1,
67 PVE
::JSONSchema
::register_format
('IPorCIDR', \
&pve_verify_ip_or_cidr
);
68 sub pve_verify_ip_or_cidr
{
69 my ($cidr, $noerr) = @_;
71 if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(?:/\d+)?$!) {
72 # Net::IP throws an error if the masked CIDR part isn't zero, e.g., `192.168.1.155/24`
73 # fails but `192.168.1.0/24` succeeds. clean_cidr removes the non zero bits from the CIDR.
74 my $clean_cidr = clean_cidr
($cidr);
75 return $cidr if Net
::IP-
>new($clean_cidr);
76 return undef if $noerr;
78 die Net
::IP
::Error
() . "\n";
80 return undef if $noerr;
81 die "value does not look like a valid IP address or CIDR network\n";
84 PVE
::JSONSchema
::register_format
('IPorCIDRorAlias', \
&pve_verify_ip_or_cidr_or_alias
);
85 sub pve_verify_ip_or_cidr_or_alias
{
86 my ($cidr, $noerr) = @_;
88 return if $cidr =~ m
@^(dc
/|guest/)?
(?
:$ip_alias_pattern)$@;
90 return pve_verify_ip_or_cidr
($cidr, $noerr);
95 my ($ip, $len) = split('/', $cidr);
96 return $cidr if !$len;
97 my $ver = ($ip =~ m!^$IPV4RE$!) ?
4 : 6;
99 my $bin_ip = Net
::IP
::ip_iptobin
( Net
::IP
::ip_expand_address
($ip, $ver), $ver);
100 my $bin_mask = Net
::IP
::ip_get_mask
($len, $ver);
101 my $clean_ip = Net
::IP
::ip_compress_address
( Net
::IP
::ip_bintoip
($bin_ip & $bin_mask, $ver), $ver);
103 return "${clean_ip}/$len";
106 PVE
::JSONSchema
::register_standard_option
('ipset-name', {
107 description
=> "IP set name.",
109 pattern
=> $ipset_name_pattern,
111 maxLength
=> $max_ipset_name_length,
114 PVE
::JSONSchema
::register_standard_option
('pve-fw-alias', {
115 description
=> "Alias name.",
117 pattern
=> $ip_alias_pattern,
119 maxLength
=> $max_alias_name_length,
122 PVE
::JSONSchema
::register_standard_option
('pve-fw-loglevel' => {
123 description
=> "Log level.",
125 enum
=> ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
129 PVE
::JSONSchema
::register_standard_option
('pve-security-group-name', {
130 description
=> "Security Group name.",
132 pattern
=> $security_group_name_pattern,
134 maxLength
=> $max_group_name_length,
137 my $feature_ipset_nomatch = 0;
139 my (undef, undef, $release) = POSIX
::uname
();
140 if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
141 my ($major, $minor) = ($1, $2);
142 $feature_ipset_nomatch = 1 if ($major > 3) ||
143 ($major == 3 && $minor >= 7);
148 my $nodename = PVE
::INotify
::nodename
();
149 my $hostfw_conf_filename = "/etc/pve/nodes/$nodename/host.fw";
151 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
153 my $default_log_level = 'nolog'; # avoid logs by default
154 my $global_log_ratelimit = '--limit 1/sec';
156 my $log_level_hash = {
178 # sport => port[,port[,port]].. or port:port
179 # dport => port[,port[,port]].. or port:port
180 # log => optional, loglevel
181 # logmsg => optional, logmsg - overwrites default
182 # iface_in => incomin interface
183 # iface_out => outgoing interface
184 # match => optional, overwrites generation of match
185 # target => optional, overwrites action
187 # we need to overwrite some macros for ipv6
188 my $pve_ipv6fw_macros = {
190 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'echo-request' },
192 'NeighborDiscovery' => [
193 "IPv6 neighbor solicitation, neighbor and router advertisement",
194 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'router-solicitation' },
195 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'router-advertisement' },
196 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'neighbor-solicitation' },
197 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'neighbor-advertisement' },
201 { action
=> 'PARAM', proto
=> 'udp', dport
=> '546:547', sport
=> '546:547' },
204 { action
=> 'PARAM', proto
=> 'udp', dport
=> '33434:33524' },
205 { action
=> 'PARAM', proto
=> 'icmpv6', dport
=> 'echo-request' },
209 # imported/converted from: /usr/share/shorewall/macro.*
210 my $pve_fw_macros = {
213 { action
=> 'PARAM', proto
=> 'udp', dport
=> '10080' },
214 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10080' },
217 "Auth (identd) traffic",
218 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '113' },
221 "Border Gateway Protocol traffic",
222 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '179' },
225 "BitTorrent traffic for BitTorrent 3.1 and earlier",
226 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6889' },
227 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
230 "BitTorrent traffic for BitTorrent 3.2 and later",
231 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6881:6999' },
232 { action
=> 'PARAM', proto
=> 'udp', dport
=> '6881' },
235 "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Daemons)",
236 # Legacy port for protocol v1
237 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6789' },
238 # New port for protocol v2
239 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3300' },
240 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6800:7300' },
243 "Concurrent Versions System pserver traffic",
244 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2401' },
247 "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
248 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1494' },
249 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1604' },
250 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2598' },
253 "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
254 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3689' },
255 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3689' },
258 "Distributed Checksum Clearinghouse spam filtering mechanism",
259 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6277' },
262 "Forwarded DHCP traffic",
263 { action
=> 'PARAM', proto
=> 'udp', dport
=> '67:68', sport
=> '67:68' },
266 "Domain Name System traffic (upd and tcp)",
267 { action
=> 'PARAM', proto
=> 'udp', dport
=> '53' },
268 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '53' },
271 "Distributed Compiler service",
272 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3632' },
275 "File Transfer Protocol",
276 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '21' },
279 "Finger protocol (RFC 742)",
280 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '79' },
283 "GNUnet secure peer-to-peer networking traffic",
284 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2086' },
285 { action
=> 'PARAM', proto
=> 'udp', dport
=> '2086' },
286 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1080' },
287 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1080' },
290 "Generic Routing Encapsulation tunneling protocol",
291 { action
=> 'PARAM', proto
=> '47' },
294 "Git distributed revision control traffic",
295 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9418' },
298 "OpenPGP HTTP key server protocol traffic",
299 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '11371' },
302 "Hypertext Transfer Protocol (WWW)",
303 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
306 "Hypertext Transfer Protocol (WWW) over SSL",
307 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
310 "Internet Cache Protocol V2 (Squid) traffic",
311 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3130' },
314 "AOL Instant Messenger traffic",
315 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5190' },
318 "Internet Message Access Protocol",
319 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '143' },
322 "Internet Message Access Protocol over SSL",
323 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '993' },
326 "IPIP capsulation traffic",
327 { action
=> 'PARAM', proto
=> '94' },
331 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
332 { action
=> 'PARAM', proto
=> '50' },
335 "IPsec authentication (AH) traffic",
336 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500', sport
=> '500' },
337 { action
=> 'PARAM', proto
=> '51' },
340 "IPsec traffic and Nat-Traversal",
341 { action
=> 'PARAM', proto
=> 'udp', dport
=> '500' },
342 { action
=> 'PARAM', proto
=> 'udp', dport
=> '4500' },
343 { action
=> 'PARAM', proto
=> '50' },
346 "Internet Relay Chat traffic",
347 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6667' },
350 "HP Jetdirect printing",
351 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '9100' },
354 "Layer 2 Tunneling Protocol traffic",
355 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1701' },
358 "Lightweight Directory Access Protocol traffic",
359 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '389' },
362 "Secure Lightweight Directory Access Protocol traffic",
363 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '636' },
366 "Microsoft Notification Protocol",
367 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1863' },
370 "Microsoft SQL Server",
371 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1433' },
374 "Mail traffic (SMTP, SMTPS, Submission)",
375 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
376 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
377 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
381 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5353' },
384 "Munin networked resource monitoring traffic",
385 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '4949' },
389 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3306' },
392 "NNTP traffic (Usenet).",
393 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '119' },
396 "Encrypted NNTP traffic (Usenet)",
397 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '563' },
400 "Network Time Protocol (ntpd)",
401 { action
=> 'PARAM', proto
=> 'udp', dport
=> '123' },
404 "OSPF multicast traffic",
405 { action
=> 'PARAM', proto
=> '89' },
409 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1194' },
412 "Symantec PCAnywere (tm)",
413 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5632' },
414 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5631' },
417 "Proxmox Mail Gateway web interface",
418 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '8006' },
422 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '110' },
425 "Encrypted POP3 traffic",
426 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '995' },
429 "Point-to-Point Tunneling Protocol",
430 { action
=> 'PARAM', proto
=> '47' },
431 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '1723' },
435 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
439 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5432' },
442 "Line Printer protocol printing",
443 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '515' },
446 "Microsoft Remote Desktop Protocol traffic",
447 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3389' },
450 "Routing Information Protocol (bidirectional)",
451 { action
=> 'PARAM', proto
=> 'udp', dport
=> '520' },
454 "BIND remote management protocol",
455 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '953' },
458 "Razor Antispam System",
459 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '2703' },
462 "Remote time retrieval (rdate)",
463 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
467 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '873' },
470 "SANE network scanning",
471 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '6566' },
474 "Microsoft SMB traffic",
475 { action
=> 'PARAM', proto
=> 'udp', dport
=> '135,445' },
476 { action
=> 'PARAM', proto
=> 'udp', dport
=> '137:139' },
477 { action
=> 'PARAM', proto
=> 'udp', dport
=> '1024:65535', sport
=> '137' },
478 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '135,139,445' },
481 "Samba Web Administration Tool",
482 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '901' },
485 "Simple Mail Transfer Protocol",
486 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '25' },
489 "Encrypted Simple Mail Transfer Protocol",
490 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '465' },
493 "Simple Network Management Protocol",
494 { action
=> 'PARAM', proto
=> 'udp', dport
=> '161:162' },
495 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '161' },
498 "Spam Assassin SPAMD traffic",
499 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '783' },
502 "Secure shell traffic",
503 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '22' },
506 "Subversion server (svnserve)",
507 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3690' },
510 "SixXS IPv6 Deployment and Tunnel Broker",
511 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3874' },
512 { action
=> 'PARAM', proto
=> 'udp', dport
=> '3740' },
513 { action
=> 'PARAM', proto
=> '41' },
514 { action
=> 'PARAM', proto
=> 'udp', dport
=> '5072,8374' },
517 "Proxmox VE SPICE display proxy traffic",
518 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3128' },
521 "Squid web proxy traffic",
522 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '3128' },
525 "Mail message submission traffic",
526 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '587' },
529 "Syslog protocol (RFC 5424) traffic",
530 { action
=> 'PARAM', proto
=> 'udp', dport
=> '514' },
531 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '514' },
534 "Trivial File Transfer Protocol traffic",
535 { action
=> 'PARAM', proto
=> 'udp', dport
=> '69' },
539 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '23' },
543 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '992' },
546 "RFC 868 Time protocol",
547 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '37' },
550 "Traceroute (for up to 30 hops) traffic",
551 { action
=> 'PARAM', proto
=> 'udp', dport
=> '33434:33524' },
552 { action
=> 'PARAM', proto
=> 'icmp', dport
=> 'echo-request' },
555 "VNC traffic for VNC display's 0 - 99",
556 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5900:5999' },
559 "VNC traffic from Vncservers to Vncviewers in listen mode",
560 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '5500' },
563 "WWW traffic (HTTP and HTTPS)",
564 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '80' },
565 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '443' },
568 "Web Cache/Proxy traffic (port 8080)",
569 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '8080' },
573 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '10000' },
576 "Whois (nicname, RFC 3912) traffic",
577 { action
=> 'PARAM', proto
=> 'tcp', dport
=> '43' },
581 my $pve_fw_helpers = {
582 'amanda' => { proto
=> 'udp', dport
=> '10080', 'v4' => 1, 'v6' => 1 },
583 'ftp' => { proto
=> 'tcp', dport
=> '21', 'v4' => 1, 'v6' => 1},
584 'irc' => { proto
=> 'tcp', dport
=> '6667', 'v4' => 1 },
585 'netbios-ns' => { proto
=> 'udp', dport
=> '137', 'v4' => 1 },
586 'pptp' => { proto
=> 'tcp', dport
=> '1723', 'v4' => 1, },
587 'sane' => { proto
=> 'tcp', dport
=> '6566', 'v4' => 1, 'v6' => 1 },
588 'sip' => { proto
=> 'udp', dport
=> '5060', 'v4' => 1, 'v6' => 1 },
589 'snmp' => { proto
=> 'udp', dport
=> '161', 'v4' => 1 },
590 'tftp' => { proto
=> 'udp', dport
=> '69', 'v4' => 1, 'v6' => 1},
593 my $pve_fw_parsed_macros;
594 my $pve_fw_macro_descr;
595 my $pve_fw_macro_ipversion = {};
596 my $pve_fw_preferred_macro_names = {};
598 my $FWACCEPTMARK_ON = "0x80000000/0x80000000";
599 my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
601 my $pve_std_chains = {};
602 my $pve_std_chains_conf = {};
603 $pve_std_chains_conf->{4} = {
604 'PVEFW-SET-ACCEPT-MARK' => [
605 { target
=> "-j MARK --set-mark $FWACCEPTMARK_ON" },
607 'PVEFW-DropBroadcast' => [
608 # same as shorewall 'Broadcast'
609 # simply DROP BROADCAST/MULTICAST/ANYCAST
610 # we can use this to reduce logging
611 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
612 { action
=> 'DROP', dsttype
=> 'MULTICAST' },
613 { action
=> 'DROP', dsttype
=> 'ANYCAST' },
614 { action
=> 'DROP', dest
=> '224.0.0.0/4' },
617 # same as shorewall 'reject'
618 { action
=> 'DROP', dsttype
=> 'BROADCAST' },
619 { action
=> 'DROP', source
=> '224.0.0.0/4' },
620 { action
=> 'DROP', proto
=> 'icmp' },
621 { match
=> '-p tcp', target
=> '-j REJECT --reject-with tcp-reset' },
622 { match
=> '-p udp', target
=> '-j REJECT --reject-with icmp-port-unreachable' },
623 { match
=> '-p icmp', target
=> '-j REJECT --reject-with icmp-host-unreachable' },
624 { target
=> '-j REJECT --reject-with icmp-host-prohibited' },
627 # same as shorewall 'Drop', which is equal to DROP,
628 # but REJECT/DROP some packages to reduce logging,
629 # and ACCEPT critical ICMP types
630 # we are not interested in BROADCAST/MULTICAST/ANYCAST
631 { action
=> 'PVEFW-DropBroadcast' },
632 # ACCEPT critical ICMP types
633 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
634 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
635 # Drop packets with INVALID state
636 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
637 # Drop Microsoft SMB noise
638 { action
=> 'DROP', proto
=> 'udp', dport
=> '135,445' },
639 { action
=> 'DROP', proto
=> 'udp', dport
=> '137:139' },
640 { action
=> 'DROP', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
641 { action
=> 'DROP', proto
=> 'tcp', dport
=> '135,139,445' },
642 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
643 # Drop new/NotSyn traffic so that it doesn't get logged
644 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
646 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
649 # same as shorewall 'Reject', which is equal to Reject,
650 # but REJECT/DROP some packages to reduce logging,
651 # and ACCEPT critical ICMP types
652 # we are not interested in BROADCAST/MULTICAST/ANYCAST
653 { action
=> 'PVEFW-DropBroadcast' },
654 # ACCEPT critical ICMP types
655 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'fragmentation-needed' },
656 { action
=> 'ACCEPT', proto
=> 'icmp', dport
=> 'time-exceeded' },
657 # Drop packets with INVALID state
658 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
659 # Drop Microsoft SMB noise
660 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '135,445' },
661 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '137:139'},
662 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
663 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '135,139,445' },
664 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
665 # Drop new/NotSyn traffic so that it doesn't get logged
666 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
668 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
670 'PVEFW-tcpflags' => [
671 # same as shorewall tcpflags action.
672 # Packets arriving on this interface are checked for some illegal combinations of TCP flags
673 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target
=> '-g PVEFW-logflags' },
674 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target
=> '-g PVEFW-logflags' },
675 { match
=> '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target
=> '-g PVEFW-logflags' },
676 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target
=> '-g PVEFW-logflags' },
677 { match
=> '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target
=> '-g PVEFW-logflags' },
680 # same as shorewall smurfs action
681 # Filter packets for smurfs (packets with a broadcast address as the source).
682 { match
=> '-s 0.0.0.0/32', target
=> '-j RETURN' }, # allow DHCP
683 { match
=> '-m addrtype --src-type BROADCAST', target
=> '-g PVEFW-smurflog' },
684 { match
=> '-s 224.0.0.0/4', target
=> '-g PVEFW-smurflog' },
686 'PVEFW-smurflog' => [
687 { action
=> 'DROP', logmsg
=> 'DROP: ' },
689 'PVEFW-logflags' => [
690 { action
=> 'DROP', logmsg
=> 'DROP: ' },
694 $pve_std_chains_conf->{6} = {
695 'PVEFW-SET-ACCEPT-MARK' => [
696 { target
=> "-j MARK --set-mark $FWACCEPTMARK_ON" },
698 'PVEFW-DropBroadcast' => [
699 # same as shorewall 'Broadcast'
700 # simply DROP BROADCAST/MULTICAST/ANYCAST
701 # we can use this to reduce logging
702 #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
703 # ipv6 addrtype does not work with kernel 2.6.32
704 #{ action => 'DROP', dsttype => 'MULTICAST' },
705 #{ action => 'DROP', dsttype => 'ANYCAST' },
706 { action
=> 'DROP', dest
=> 'ff00::/8' },
707 #{ action => 'DROP', dest => '224.0.0.0/4' },
710 { action
=> 'DROP', proto
=> 'icmpv6' },
711 { match
=> '-p tcp', target
=> '-j REJECT --reject-with tcp-reset' },
712 { match
=> '-p udp', target
=> '-j REJECT --reject-with icmp6-port-unreachable' },
713 { target
=> '-j REJECT --reject-with icmp6-adm-prohibited' },
716 # same as shorewall 'Drop', which is equal to DROP,
717 # but REJECT/DROP some packages to reduce logging,
718 # and ACCEPT critical ICMP types
719 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
720 # we are not interested in BROADCAST/MULTICAST/ANYCAST
721 { action
=> 'PVEFW-DropBroadcast' },
722 # ACCEPT critical ICMP types
723 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'destination-unreachable' },
724 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'time-exceeded' },
725 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'packet-too-big' },
726 # Drop packets with INVALID state
727 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
728 # Drop Microsoft SMB noise
729 { action
=> 'DROP', proto
=> 'udp', dport
=> '135,445' },
730 { action
=> 'DROP', proto
=> 'udp', dport
=> '137:139'},
731 { action
=> 'DROP', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
732 { action
=> 'DROP', proto
=> 'tcp', dport
=> '135,139,445' },
733 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
734 # Drop new/NotSyn traffic so that it doesn't get logged
735 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
737 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
740 # same as shorewall 'Reject', which is equal to Reject,
741 # but REJECT/DROP some packages to reduce logging,
742 # and ACCEPT critical ICMP types
743 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '43' }, # REJECT 'auth'
744 # we are not interested in BROADCAST/MULTICAST/ANYCAST
745 { action
=> 'PVEFW-DropBroadcast' },
746 # ACCEPT critical ICMP types
747 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'destination-unreachable' },
748 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'time-exceeded' },
749 { action
=> 'ACCEPT', proto
=> 'icmpv6', dport
=> 'packet-too-big' },
750 # Drop packets with INVALID state
751 { action
=> 'DROP', match
=> '-m conntrack --ctstate INVALID', },
752 # Drop Microsoft SMB noise
753 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '135,445' },
754 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '137:139' },
755 { action
=> 'PVEFW-reject', proto
=> 'udp', dport
=> '1024:65535', sport
=> 137 },
756 { action
=> 'PVEFW-reject', proto
=> 'tcp', dport
=> '135,139,445' },
757 { action
=> 'DROP', proto
=> 'udp', dport
=> 1900 }, # UPnP
758 # Drop new/NotSyn traffic so that it doesn't get logged
759 { action
=> 'DROP', match
=> '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
761 { action
=> 'DROP', proto
=> 'udp', sport
=> 53 },
763 'PVEFW-tcpflags' => [
764 # same as shorewall tcpflags action.
765 # Packets arriving on this interface are checked for some illegal combinations of TCP flags
766 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target
=> '-g PVEFW-logflags' },
767 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target
=> '-g PVEFW-logflags' },
768 { match
=> '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target
=> '-g PVEFW-logflags' },
769 { match
=> '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target
=> '-g PVEFW-logflags' },
770 { match
=> '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target
=> '-g PVEFW-logflags' },
772 'PVEFW-logflags' => [
773 { action
=> 'DROP', logmsg
=> 'DROP: ' },
777 # iptables -p icmp -h
778 my $icmp_type_names = {
781 'destination-unreachable' => 1,
782 'network-unreachable' => 1,
783 'host-unreachable' => 1,
784 'protocol-unreachable' => 1,
785 'port-unreachable' => 1,
786 'fragmentation-needed' => 1,
787 'source-route-failed' => 1,
788 'network-unknown' => 1,
790 'network-prohibited' => 1,
791 'host-prohibited' => 1,
792 'TOS-network-unreachable' => 1,
793 'TOS-host-unreachable' => 1,
794 'communication-prohibited' => 1,
795 'host-precedence-violation' => 1,
796 'precedence-cutoff' => 1,
797 'source-quench' => 1,
799 'network-redirect' => 1,
800 'host-redirect' => 1,
801 'TOS-network-redirect' => 1,
802 'TOS-host-redirect' => 1,
804 'router-advertisement' => 1,
805 'router-solicitation' => 1,
806 'time-exceeded' => 1,
807 'ttl-zero-during-transit' => 1,
808 'ttl-zero-during-reassembly' => 1,
809 'parameter-problem' => 1,
810 'ip-header-bad' => 1,
811 'required-option-missing' => 1,
812 'timestamp-request' => 1,
813 'timestamp-reply' => 1,
814 'address-mask-request' => 1,
815 'address-mask-reply' => 1,
818 # ip6tables -p icmpv6 -h
820 my $icmpv6_type_names = {
821 'destination-unreachable' => 1,
823 'communication-prohibited' => 1,
825 'address-unreachable' => 1,
826 'port-unreachable' => 1,
827 'failed-policy' => 1,
829 'packet-too-big' => 1,
830 'time-exceeded' => 1,
831 'ttl-zero-during-transit' => 1,
832 'ttl-zero-during-reassembly' => 1,
833 'parameter-problem' => 1,
835 'unknown-header-type' => 1,
836 'unknown-option' => 1,
839 'router-solicitation' => 1,
840 'router-advertisement' => 1,
841 'neighbor-solicitation' => 1,
842 'neighbour-solicitation' => 1,
843 'neighbor-advertisement' => 1,
844 'neighbour-advertisement' => 1,
848 my $is_valid_icmp_type = sub {
849 my ($type, $valid_types) = @_;
851 if ($type =~ m/^\d+$/) {
852 # values for icmp-type range between 0 and 255 (8 bit field)
853 die "invalid icmp-type '$type'\n" if $type > 255;
855 die "unknown icmp-type '$type'\n" if !defined($valid_types->{$type});
859 my $proto_is_icmp = sub {
861 return $proto eq 'icmp' || $proto eq 'icmpv6' || $proto eq 'ipv6-icmp';
864 sub init_firewall_macros
{
866 $pve_fw_parsed_macros = {};
869 my ($k, $macro) = @_;
870 my $lc_name = lc($k);
871 $pve_fw_macro_ipversion->{$k} = 0;
872 while (!ref($macro->[0])) {
873 my $desc = shift @$macro;
874 if ($desc eq 'ipv4only') {
875 $pve_fw_macro_ipversion->{$k} = 4;
876 } elsif ($desc eq 'ipv6only') {
877 $pve_fw_macro_ipversion->{$k} = 6;
879 $pve_fw_macro_descr->{$k} = $desc;
882 $pve_fw_preferred_macro_names->{$lc_name} = $k;
883 $pve_fw_parsed_macros->{$k} = $macro;
886 foreach my $k (keys %$pve_fw_macros) {
887 &$parse($k, $pve_fw_macros->{$k});
890 foreach my $k (keys %$pve_ipv6fw_macros) {
891 next if $pve_fw_parsed_macros->{$k};
892 &$parse($k, $pve_ipv6fw_macros->{$k});
893 $pve_fw_macro_ipversion->{$k} = 6;
897 init_firewall_macros
();
900 return wantarray ?
($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
905 sub get_etc_services
{
907 return $etc_services if $etc_services;
909 my $filename = "/etc/services";
911 my $fh = IO
::File-
>new($filename, O_RDONLY
);
913 warn "unable to read '$filename' - $!\n";
919 while (my $line = <$fh>) {
921 next if $line =~m/^#/;
922 next if ($line =~m/^\s*$/);
924 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp|sctp).*$!) {
925 $services->{byid
}->{$2}->{name
} = $1;
926 $services->{byid
}->{$2}->{port
} = $2;
927 $services->{byid
}->{$2}->{$3} = 1;
928 $services->{byname
}->{$1} = $services->{byid
}->{$2};
934 $etc_services = $services;
937 return $etc_services;
940 sub parse_protocol_file
{
943 my $fh = IO
::File-
>new($filename, O_RDONLY
);
945 warn "unable to read '$filename' - $!\n";
951 while (my $line = <$fh>) {
953 next if $line =~m/^#/;
954 next if ($line =~m/^\s*$/);
956 if ($line =~ m!^(\S+)\s+(\d+)(?:\s+.*)?$!) {
957 $protocols->{byid
}->{$2}->{name
} = $1;
958 $protocols->{byname
}->{$1} = $protocols->{byid
}->{$2};
969 sub get_etc_protocols
{
970 return $etc_protocols if $etc_protocols;
972 my $protocols = parse_protocol_file
('/etc/protocols');
974 # add special case for ICMP v6
975 $protocols->{byid
}->{icmpv6
}->{name
} = "icmpv6";
976 $protocols->{byname
}->{icmpv6
} = $protocols->{byid
}->{icmpv6
};
978 $etc_protocols = $protocols;
980 return $etc_protocols;
985 sub get_etc_ethertypes
{
986 $etc_ethertypes = parse_protocol_file
('/etc/ethertypes')
988 return $etc_ethertypes;
994 my ($new_value) = @_;
996 $__local_network = $new_value if defined($new_value);
998 return $__local_network if defined($__local_network);
1001 my $nodename = PVE
::INotify
::nodename
();
1003 my $ip = PVE
::Cluster
::remote_node_ip
($nodename);
1005 my $testip = Net
::IP-
>new($ip);
1007 my $isv6 = $testip->version == 6;
1008 my $routes = $isv6 ? PVE
::ProcFSTools
::read_proc_net_ipv6_route
()
1009 : PVE
::ProcFSTools
::read_proc_net_route
();
1010 foreach my $entry (@$routes) {
1013 $mask = $entry->{prefix
};
1014 next if !$mask; # skip the default route...
1016 $mask = $PVE::Network
::ipv4_mask_hash_localnet-
>{$entry->{mask
}};
1017 next if !defined($mask);
1019 my $cidr = "$entry->{dest}/$mask";
1020 my $testnet = Net
::IP-
>new($cidr);
1021 my $overlap = $testnet->overlaps($testip);
1022 if ($overlap == $Net::IP
::IP_B_IN_A_OVERLAP
||
1023 $overlap == $Net::IP
::IP_IDENTICAL
)
1025 $__local_network = $cidr;
1032 return $__local_network;
1035 # ipset names are limited to 31 characters,
1036 # and we use '-v4' or '-v6' to indicate IP versions,
1037 # and we use '_swap' suffix for atomic update,
1038 # for example PVEFW-${VMID}-${ipset_name}_swap
1040 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
1042 sub compute_ipset_chain_name
{
1043 my ($vmid, $ipset_name, $ipversion) = @_;
1045 $vmid = 0 if !defined($vmid);
1047 my $id = "$vmid-${ipset_name}-v$ipversion";
1049 if (length($id) > $max_iptables_ipset_name_length) {
1050 $id = PVE
::Tools
::fnv31a_hex
($id);
1056 sub compute_ipfilter_ipset_name
{
1059 return "ipfilter-$iface";
1062 sub parse_address_list
{
1065 if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
1066 die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
1070 if ($str =~ m
@^(dc
/|guest/)?
${ip_alias_pattern
}$@) {
1071 die "alias name too long\n" if length($str) > $max_alias_name_length;
1079 my @elements = split(/,/, $str);
1080 die "extraneous commas in list\n" if $str ne join(',', @elements);
1081 foreach my $elem (@elements) {
1083 my $ip = Net
::IP-
>new($elem);
1085 my $err = Net
::IP
::Error
();
1086 die "invalid IP address: $err\n";
1088 $iprange = 1 if $elem =~ m/-/;
1090 my $new_ipversion = Net
::IP
::ip_is_ipv6
($ip->ip()) ?
6 : 4;
1092 die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
1093 if $ipversion && ($new_ipversion != $ipversion);
1095 $ipversion = $new_ipversion;
1098 die "you can't use a range in a list\n" if $iprange && $count > 1;
1103 # $dport must only be set to 1 if the parsed parameter is dport and the
1104 # protocol is one of the ICMP variants - ICMP type values used to be stored in
1105 # the dport parameter.
1106 sub parse_port_name_number_or_range
{
1107 my ($str, $dport) = @_;
1109 my $services = PVE
::Firewall
::get_etc_services
();
1113 my @elements = split(/,/, $str);
1114 die "extraneous commas in list\n" if $str ne join(',', @elements);
1115 foreach my $item (@elements) {
1116 if ($item =~ m/^([0-9]+):([0-9]+)$/) {
1118 my ($port1, $port2) = ($1, $2);
1119 die "invalid port '$port1'\n" if $port1 > 65535;
1120 die "invalid port '$port2'\n" if $port2 > 65535;
1121 die "backwards range '$port1:$port2' not allowed, did you mean '$port2:$port1'?\n" if $port1 > $port2;
1122 } elsif ($item =~ m/^([0-9]+)$/) {
1125 die "invalid port '$port'\n" if $port > 65535;
1127 if ($dport && $icmp_type_names->{$item}) {
1129 } elsif ($dport && $icmpv6_type_names->{$item}) {
1132 die "invalid port '$item'\n" if !$services->{byname
}->{$item};
1137 die "ICMP ports not allowed in port range\n" if $icmp_port && $count > 0;
1139 # I really don't like to use the word number here, but it's the only thing
1140 # that makes sense in a literal way. The range 1:100 counts as 2, not as
1141 # one and not as 100...
1142 die "too many entries in port list (> 15 numbers)\n"
1145 return (scalar(@elements) > 1);
1148 PVE
::JSONSchema
::register_format
('pve-fw-conntrack-helper', \
&pve_fw_verify_conntrack_helper
);
1149 sub pve_fw_verify_conntrack_helper
{
1152 my @helpers = split(/,/, $list);
1153 die "extraneous commas in list\n" if $list ne join(',', @helpers);
1154 foreach my $helper (@helpers) {
1155 die "unknown helper $helper" if !$pve_fw_helpers->{$helper};
1161 PVE
::JSONSchema
::register_format
('pve-fw-sport-spec', \
&pve_fw_verify_sport_spec
);
1162 sub pve_fw_verify_sport_spec
{
1165 parse_port_name_number_or_range
($portstr, 0);
1170 PVE
::JSONSchema
::register_format
('pve-fw-dport-spec', \
&pve_fw_verify_dport_spec
);
1171 sub pve_fw_verify_dport_spec
{
1174 parse_port_name_number_or_range
($portstr, 1);
1179 PVE
::JSONSchema
::register_format
('pve-fw-addr-spec', \
&pve_fw_verify_addr_spec
);
1180 sub pve_fw_verify_addr_spec
{
1183 parse_address_list
($list);
1188 PVE
::JSONSchema
::register_format
('pve-fw-protocol-spec', \
&pve_fw_verify_protocol_spec
);
1189 sub pve_fw_verify_protocol_spec
{
1192 my $protocols = get_etc_protocols
();
1194 die "unknown protocol '$proto'\n" if $proto &&
1195 !(defined($protocols->{byname
}->{$proto}) ||
1196 defined($protocols->{byid
}->{$proto}));
1201 PVE
::JSONSchema
::register_format
('pve-fw-icmp-type-spec', \
&pve_fw_verify_icmp_type_spec
);
1202 sub pve_fw_verify_icmp_type_spec
{
1203 my ($icmp_type) = @_;
1205 if ($icmp_type_names->{$icmp_type} || $icmpv6_type_names->{$icmp_type}) {
1209 die "invalid icmp-type value '$icmp_type'\n" if $icmp_type ne '';
1215 # helper function for API
1217 sub copy_opject_with_digest
{
1220 my $sha = Digest
::SHA-
>new('sha1');
1223 foreach my $k (sort keys %$object) {
1224 my $v = $object->{$k};
1225 next if !defined($v);
1227 $sha->add($k, ':', $v, "\n");
1230 my $digest = $sha->hexdigest;
1232 $res->{digest
} = $digest;
1234 return wantarray ?
($res, $digest) : $res;
1237 sub copy_list_with_digest
{
1240 my $sha = Digest
::SHA-
>new('sha1');
1243 foreach my $entry (@$list) {
1245 foreach my $k (sort keys %$entry) {
1246 my $v = $entry->{$k};
1247 next if !defined($v);
1249 # Note: digest ignores refs ($rule->{errors})
1250 # since Digest::SHA expects a series of bytes,
1251 # we have to encode the value here to prevent errors when
1252 # using utf8 characters (eg. in comments)
1253 $sha->add($k, ':', encode_utf8
($v), "\n") if !ref($v); ;
1258 my $digest = $sha->hexdigest;
1260 foreach my $entry (@$res) {
1261 $entry->{digest
} = $digest;
1264 return wantarray ?
($res, $digest) : $res;
1267 our $cluster_option_properties = {
1269 description
=> "Enable or disable the firewall cluster wide.",
1275 description
=> "Enable ebtables rules cluster wide.",
1281 description
=> "Input policy.",
1284 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1287 description
=> "Output policy.",
1290 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1293 description
=> "Log ratelimiting settings",
1294 type
=> 'string', format
=> {
1297 description
=> 'Enable or disable log rate limiting',
1303 description
=> 'Frequency with which the burst bucket gets refilled',
1305 pattern
=> '[1-9][0-9]*\/(second|minute|hour|day)',
1306 format_description
=> 'rate',
1307 default => '1/second',
1313 description
=> 'Initial burst of packages which will always get logged before the rate is applied',
1321 our $host_option_properties = {
1323 description
=> "Enable host firewall rules.",
1327 log_level_in
=> get_standard_option
('pve-fw-loglevel', {
1328 description
=> "Log level for incoming traffic." }),
1329 log_level_out
=> get_standard_option
('pve-fw-loglevel', {
1330 description
=> "Log level for outgoing traffic." }),
1331 tcp_flags_log_level
=> get_standard_option
('pve-fw-loglevel', {
1332 description
=> "Log level for illegal tcp flags filter." }),
1333 smurf_log_level
=> get_standard_option
('pve-fw-loglevel', {
1334 description
=> "Log level for SMURFS filter." }),
1336 description
=> "Enable SMURFS filter.",
1341 description
=> "Filter illegal combinations of TCP flags.",
1346 nf_conntrack_max
=> {
1347 description
=> "Maximum number of tracked connections.",
1353 nf_conntrack_tcp_timeout_established
=> {
1354 description
=> "Conntrack established timeout.",
1360 nf_conntrack_tcp_timeout_syn_recv
=> {
1361 description
=> "Conntrack syn recv timeout.",
1369 description
=> "Enable NDP (Neighbor Discovery Protocol).",
1374 nf_conntrack_allow_invalid
=> {
1375 description
=> "Allow invalid packets on connection tracking.",
1380 nf_conntrack_helpers
=> {
1381 type
=> 'string', format
=> 'pve-fw-conntrack-helper',
1382 description
=> "Enable conntrack helpers for specific protocols. ".
1383 "Supported protocols: amanda, ftp, irc, netbios-ns, pptp, sane, sip, snmp, tftp",
1387 protection_synflood
=> {
1388 description
=> "Enable synflood protection",
1393 protection_synflood_rate
=> {
1394 description
=> "Synflood protection rate syn/sec by ip src.",
1399 protection_synflood_burst
=> {
1400 description
=> "Synflood protection rate burst by ip src.",
1405 log_nf_conntrack
=> {
1406 description
=> "Enable logging of conntrack information.",
1412 description
=> "Enable nftables based firewall (tech preview)",
1419 our $vm_option_properties = {
1421 description
=> "Enable/disable firewall rules.",
1427 description
=> "Enable/disable MAC address filter.",
1433 description
=> "Enable DHCP.",
1439 description
=> "Enable NDP (Neighbor Discovery Protocol).",
1445 description
=> "Allow sending Router Advertisement.",
1450 description
=> "Enable default IP filters. " .
1451 "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1452 "for every interface. Such ipsets implicitly contain sane default " .
1453 "restrictions such as restricting IPv6 link local addresses to " .
1454 "the one derived from the interface's MAC address. For containers " .
1455 "the configured IP addresses will be implicitly added.",
1460 description
=> "Input policy.",
1463 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1466 description
=> "Output policy.",
1469 enum
=> ['ACCEPT', 'REJECT', 'DROP'],
1471 log_level_in
=> get_standard_option
('pve-fw-loglevel', {
1472 description
=> "Log level for incoming traffic." }),
1473 log_level_out
=> get_standard_option
('pve-fw-loglevel', {
1474 description
=> "Log level for outgoing traffic." }),
1479 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.";
1481 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.";
1483 my $rule_properties = {
1485 description
=> "Update rule at position <pos>.",
1490 digest
=> get_standard_option
('pve-config-digest'),
1492 description
=> "Rule type.",
1495 enum
=> ['in', 'out', 'group'],
1498 description
=> "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1501 pattern
=> $security_group_name_pattern,
1506 description
=> "Use predefined standard macro.",
1511 iface
=> get_standard_option
('pve-iface', {
1512 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.",
1516 description
=> "Restrict packet source address. $addr_list_descr",
1517 type
=> 'string', format
=> 'pve-fw-addr-spec',
1522 description
=> "Restrict packet destination address. $addr_list_descr",
1523 type
=> 'string', format
=> 'pve-fw-addr-spec',
1528 description
=> "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1529 type
=> 'string', format
=> 'pve-fw-protocol-spec',
1533 description
=> "Flag to enable/disable a rule.",
1538 log => get_standard_option
('pve-fw-loglevel', {
1539 description
=> "Log level for firewall rule.",
1542 description
=> "Restrict TCP/UDP source port. $port_descr",
1543 type
=> 'string', format
=> 'pve-fw-sport-spec',
1547 description
=> "Restrict TCP/UDP destination port. $port_descr",
1548 type
=> 'string', format
=> 'pve-fw-dport-spec',
1552 description
=> "Descriptive comment.",
1557 description
=> "Specify icmp-type. Only valid if proto equals 'icmp' or 'icmpv6'/'ipv6-icmp'.",
1558 type
=> 'string', format
=> 'pve-fw-icmp-type-spec',
1563 sub add_rule_properties
{
1564 my ($properties) = @_;
1566 foreach my $k (keys %$rule_properties) {
1567 my $h = $rule_properties->{$k};
1568 # copy data, so that we can modify later without side effects
1569 foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1575 sub delete_rule_properties
{
1576 my ($rule, $delete_str) = @_;
1578 foreach my $opt (PVE
::Tools
::split_list
($delete_str)) {
1579 raise_param_exc
({ 'delete' => "no such property ('$opt')"})
1580 if !defined($rule_properties->{$opt});
1581 raise_param_exc
({ 'delete' => "unable to delete required property '$opt'"})
1582 if $opt eq 'type' || $opt eq 'action';
1583 delete $rule->{$opt};
1589 my $apply_macro = sub {
1590 my ($macro_name, $param, $verify, $ipversion) = @_;
1592 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1593 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1595 if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1596 $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1599 # skip macros which are specific to another ipversion
1600 if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1601 return if $ipversion != $required;
1606 foreach my $templ (@$macro_rules) {
1608 my $param_used = {};
1609 foreach my $k (keys %$templ) {
1610 my $v = $templ->{$k};
1611 if ($v eq 'PARAM') {
1613 $param_used->{$k} = 1;
1614 } elsif ($v eq 'DEST') {
1615 $v = $param->{dest
};
1616 $param_used->{dest
} = 1;
1617 } elsif ($v eq 'SOURCE') {
1618 $v = $param->{source
};
1619 $param_used->{source
} = 1;
1623 my $msg = "missing parameter '$k' in macro '$macro_name'";
1624 raise_param_exc
({ macro => $msg }) if $verify;
1629 foreach my $k (keys %$param) {
1630 next if $k eq 'macro';
1631 next if !defined($param->{$k});
1632 next if $param_used->{$k};
1633 if (defined($rule->{$k})) {
1634 if ($rule->{$k} ne $param->{$k}) {
1635 my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1636 raise_param_exc
({ $k => $msg }) if $verify;
1640 $rule->{$k} = $param->{$k};
1643 push @$rules, $rule;
1649 my $rule_env_iface_lookup = {
1658 my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1660 my $allow_groups = $rule_env eq 'group' ?
0 : 1;
1662 my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1663 die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1665 my $errors = $rule->{errors
} || {};
1667 my $error_count = 0;
1669 my $add_error = sub {
1670 my ($param, $msg) = @_;
1672 raise_param_exc
({ $param => $msg }) if !$noerr;
1674 $errors->{$param} = $msg if !$errors->{$param};
1678 my $set_ip_version = sub {
1681 die "detected mixed ipv4/ipv6 addresses in rule\n"
1682 if $ipversion && ($vers != $ipversion);
1687 my $check_ipset_or_alias_property = sub {
1688 my ($name, $expected_ipversion) = @_;
1690 if (my $value = $rule->{$name}) {
1691 if ($value =~ m/^\+/) {
1692 if ($value =~ m
@^\+(guest
/|dc/)?
(${ipset_name_pattern
})$@) {
1693 &$add_error($name, "no such ipset '$2'")
1694 if !($cluster_conf->{ipset
}->{$2} || ($fw_conf && $fw_conf->{ipset
}->{$2}));
1697 &$add_error($name, "invalid ipset name '$value'");
1699 } elsif ($value =~ m
@^(guest
/|dc/)?
(${ip_alias_pattern
})$@){
1700 my $scope = $1 // "";
1702 &$add_error($name, "no such alias '$value'")
1703 if !($cluster_conf->{aliases
}->{$alias} || ($fw_conf && $fw_conf->{aliases
}->{$alias}));
1706 if ($scope ne 'dc/' && $fw_conf) {
1707 $e = $fw_conf->{aliases
}->{$alias};
1709 if ($scope ne 'guest/' && !$e && $cluster_conf) {
1710 $e = $cluster_conf->{aliases
}->{$alias};
1713 &$set_ip_version($e->{ipversion
});
1718 my $type = $rule->{type
};
1719 my $action = $rule->{action
};
1721 &$add_error('type', "missing property") if !$type;
1722 &$add_error('action', "missing property") if !$action;
1725 if ($type eq 'in' || $type eq 'out') {
1726 &$add_error('action', "unknown action '$action'")
1727 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1728 } elsif ($type eq 'group') {
1729 &$add_error('type', "security groups not allowed")
1731 &$add_error('action', "invalid characters in security group name")
1732 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1734 &$add_error('type', "unknown rule type '$type'");
1738 if ($rule->{iface
}) {
1739 &$add_error('type', "parameter -i not allowed for this rule type")
1741 eval { PVE
::JSONSchema
::pve_verify_iface
($rule->{iface
}); };
1742 &$add_error('iface', $@) if $@;
1743 if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1744 &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1745 if $rule->{iface
} !~ m/^net(\d+)$/;
1749 if ($rule->{macro}) {
1750 if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1751 $rule->{macro} = $preferred_name;
1753 &$add_error('macro', "unknown macro '$rule->{macro}'");
1758 if ($rule->{proto
}) {
1759 eval { pve_fw_verify_protocol_spec
($rule->{proto
}); };
1760 &$add_error('proto', $@) if $@;
1761 &$set_ip_version(4) if $rule->{proto
} eq 'icmp';
1762 &$set_ip_version(6) if $rule->{proto
} eq 'icmpv6';
1763 &$set_ip_version(6) if $rule->{proto
} eq 'ipv6-icmp';
1764 $is_icmp = $proto_is_icmp->($rule->{proto
});
1767 if ($rule->{dport
}) {
1768 eval { parse_port_name_number_or_range
($rule->{dport
}, $is_icmp); };
1769 &$add_error('dport', $@) if $@;
1770 my $proto = $rule->{proto
};
1771 &$add_error('proto', "missing property - 'dport' requires this property")
1773 &$add_error('dport', "protocol '$proto' does not support ports")
1774 if !$PROTOCOLS_WITH_PORTS->{$proto} && !$is_icmp; #special cases
1777 if (my $icmp_type = $rule ->{'icmp-type'}) {
1778 my $proto = $rule->{proto
};
1779 &$add_error('proto', "missing property - 'icmp-type' requires this property")
1781 &$add_error('icmp-type', "'icmp-type' cannot be specified together with 'dport'")
1783 if ($proto eq 'icmp' && !$icmp_type_names->{$icmp_type}) {
1784 &$add_error('icmp-type', "invalid icmp-type '$icmp_type' for proto 'icmp'");
1785 } elsif (($proto eq 'icmpv6' || $proto eq 'ipv6-icmp') && !$icmpv6_type_names->{$icmp_type}) {
1786 &$add_error('icmp-type', "invalid icmp-type '$icmp_type' for proto '$proto'");
1790 if ($rule->{sport
}) {
1791 eval { parse_port_name_number_or_range
($rule->{sport
}, 0); };
1792 &$add_error('sport', $@) if $@;
1793 my $proto = $rule->{proto
};
1794 &$add_error('proto', "missing property - 'sport' requires this property")
1796 &$add_error('sport', "protocol '$proto' does not support ports")
1797 if !$PROTOCOLS_WITH_PORTS->{$proto};
1800 if ($rule->{source
}) {
1802 my $source_ipversion = parse_address_list
($rule->{source
});
1803 &$set_ip_version($source_ipversion);
1805 &$add_error('source', $@) if $@;
1806 &$check_ipset_or_alias_property('source', $ipversion);
1809 if ($rule->{dest
}) {
1811 my $dest_ipversion = parse_address_list
($rule->{dest
});
1812 &$set_ip_version($dest_ipversion);
1814 &$add_error('dest', $@) if $@;
1815 &$check_ipset_or_alias_property('dest', $ipversion);
1818 $rule->{ipversion
} = $ipversion if $ipversion;
1820 if ($rule->{macro} && !$error_count) {
1821 eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1823 if (ref($err) eq "PVE::Exception" && $err->{errors
}) {
1824 my $eh = $err->{errors
};
1825 foreach my $p (keys %$eh) {
1826 &$add_error($p, $eh->{$p});
1829 &$add_error('macro', "$err");
1834 $rule->{errors
} = $errors if $error_count;
1839 sub copy_rule_data
{
1840 my ($rule, $param) = @_;
1842 foreach my $k (keys %$rule_properties) {
1843 if (defined(my $v = $param->{$k})) {
1844 if ($v eq '' || $v eq '-') {
1855 sub rules_modify_permissions
{
1856 my ($rule_env) = @_;
1858 if ($rule_env eq 'host') {
1860 check
=> ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1862 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1864 check
=> ['perm', '/', [ 'Sys.Modify' ]],
1866 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1868 check
=> ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1875 sub rules_audit_permissions
{
1876 my ($rule_env) = @_;
1878 if ($rule_env eq 'host') {
1880 check
=> ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1882 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1884 check
=> ['perm', '/', [ 'Sys.Audit' ]],
1886 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1888 check
=> ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1897 sub enable_bridge_firewall
{
1900 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1901 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1903 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1904 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/ipv4/tcp_syncookies", "1");
1908 sub iptables_restore_cmdlist
{
1909 my ($cmdlist, $table) = @_;
1911 $table = 'filter' if !$table;
1912 run_command
(['iptables-restore', '-T', $table, '-n'], input
=> $cmdlist, errmsg
=> "iptables_restore_cmdlist");
1915 sub ip6tables_restore_cmdlist
{
1916 my ($cmdlist, $table) = @_;
1918 $table = 'filter' if !$table;
1919 run_command
(['ip6tables-restore', '-T', $table, '-n'], input
=> $cmdlist, errmsg
=> "iptables_restore_cmdlist");
1922 sub ipset_restore_cmdlist
{
1925 run_command
(['ipset', 'restore'], input
=> $cmdlist, errmsg
=> "ipset_restore_cmdlist");
1928 sub ebtables_restore_cmdlist
{
1931 run_command
(['ebtables-restore'], input
=> $cmdlist, errmsg
=> "ebtables_restore_cmdlist");
1934 sub iptables_get_chains
{
1935 my ($iptablescmd, $t) = @_;
1937 $iptablescmd = "iptables" if !$iptablescmd;
1938 $t = 'filter' if !$t;
1942 # check what chains we want to track
1943 my $is_pvefw_chain = sub {
1946 return 1 if $name =~ m/^PVEFW-\S+$/;
1948 return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1950 return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1952 return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1953 return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1965 return if $line =~ m/^#/;
1966 return if $line =~ m/^\s*$/;
1968 if ($line =~ m/^\*(\S+)$/) {
1973 return if $table ne $t;
1975 if ($line =~ m/^:(\S+)\s/) {
1977 return if !&$is_pvefw_chain($chain);
1978 $res->{$chain} = "unknown";
1979 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1980 my ($chain, $sig) = ($1, $2);
1981 return if !&$is_pvefw_chain($chain);
1982 $res->{$chain} = $sig;
1983 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD|PREROUTING)\s+-j\s+PVEFW-\1$/) {
1986 # simply ignore the rest
1991 run_command
(["$iptablescmd-save"], outfunc
=> $parser);
1993 return wantarray ?
($res, $hooks) : $res;
1996 sub iptables_chain_digest
{
1998 my $digest = Digest
::SHA-
>new('sha1');
1999 foreach my $rule (@$rules) { # order is important
2000 $digest->add($rule);
2002 return $digest->b64digest;
2005 sub ipset_chain_digest
{
2008 my $digest = Digest
::SHA-
>new('sha1');
2009 foreach my $rule (sort @$rules) { # note: sorted
2010 $digest->add($rule);
2012 return $digest->b64digest;
2015 sub ipset_get_chains
{
2023 return if $line =~ m/^#/;
2024 return if $line =~ m/^\s*$/;
2025 if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
2027 # ignore initval from ipset v7.7+, won't set that yet so it'd mess up change detection
2028 $line =~ s/\binitval 0x[0-9a-f]+//;
2029 $line =~ s/\s+$//; # delete trailing white space
2030 push @{$chains->{$chain}}, $line;
2032 # simply ignore the rest
2037 run_command
(['ipset', 'save'], outfunc
=> $parser);
2039 # compute digest for each chain
2040 foreach my $chain (keys %$chains) {
2041 $res->{$chain} = ipset_chain_digest
($chains->{$chain});
2047 sub ebtables_get_chains
{
2054 return if $line =~ m/^#/;
2055 return if $line =~ m/^\s*$/;
2056 if ($line =~ m/^\*(\S+)$/) {
2061 return if $table ne "filter";
2063 if ($line =~ m/^:(\S+)\s(ACCEPT|DROP|RETURN)$/) {
2064 # Make sure we know chains exist even if they're empty.
2065 $chains->{$1} //= [];
2066 $res->{$1}->{policy
} = $2;
2067 } elsif ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
2070 push @{$chains->{$chain}}, $line;
2072 # simply ignore the rest
2077 run_command
(['ebtables-save'], outfunc
=> $parser);
2078 # compute digest for each chain and store rules as well
2079 foreach my $chain (keys %$chains) {
2080 $res->{$chain}->{rules
} = $chains->{$chain};
2081 $res->{$chain}->{sig
} = iptables_chain_digest
($chains->{$chain});
2086 # substitute action of rule according to action hash
2087 sub rule_substitude_action
{
2088 my ($rule, $actions) = @_;
2090 if (my $action = $rule->{action
}) {
2091 $rule->{action
} = $actions->{$action} if defined($actions->{$action});
2095 # generate a src or dst match
2096 # $dir(ection) is either d or s
2097 sub ipt_gen_src_or_dst_match
{
2098 my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
2103 } elsif ($dir eq 'd') {
2106 die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
2110 if ($adr =~ m/^\+/) {
2111 if ($adr =~ m
@^\+(guest
/|dc/)?
(${ipset_name_pattern
})$@) {
2112 my $scope = $1 // "";
2115 if ($scope ne 'dc/' && $fw_conf && $fw_conf->{ipset
}->{$name}) {
2116 $ipset_chain = compute_ipset_chain_name
($fw_conf->{vmid
}, $name, $ipversion);
2117 } elsif ($scope ne 'guest/' && $cluster_conf && $cluster_conf->{ipset
}->{$name}) {
2118 $ipset_chain = compute_ipset_chain_name
(0, $name, $ipversion);
2120 die "no such ipset '$name'\n";
2122 $match = "-m set --match-set ${ipset_chain} ${srcdst}";
2124 die "invalid security group name '$adr'\n";
2126 } elsif ($adr =~ m
@^(dc
/|guest/)?
(${ip_alias_pattern
})$@){
2127 my $scope = $1 // "";
2130 if ($scope ne 'dc/' && $fw_conf) {
2131 $e = $fw_conf->{aliases
}->{$alias};
2133 if ($scope ne 'guest/' && !$e && $cluster_conf) {
2134 $e = $cluster_conf->{aliases
}->{$alias};
2136 die "no such alias '$adr'\n" if !$e;
2137 $match = "-${dir} $e->{cidr}";
2138 } elsif ($adr =~ m/\-/){
2139 $match = "-m iprange --${srcdst}-range $adr";
2141 $match = "-${dir} $adr";
2147 # convert a %rule to an array of iptables commands
2148 sub ipt_rule_to_cmds
{
2149 my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
2151 die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
2155 if (defined $rule->{match
}) {
2156 push @match, $rule->{match
};
2158 push @match, "-i $rule->{iface_in}" if $rule->{iface_in
};
2159 push @match, "-o $rule->{iface_out}" if $rule->{iface_out
};
2161 if ($rule->{source
}) {
2162 push @match, ipt_gen_src_or_dst_match
($rule->{source
}, 's', $ipversion, $cluster_conf, $fw_conf);
2164 if ($rule->{dest
}) {
2165 push @match, ipt_gen_src_or_dst_match
($rule->{dest
}, 'd', $ipversion, $cluster_conf, $fw_conf);
2168 if (my $proto = $rule->{proto
}) {
2169 push @match, "-p $proto";
2170 my $is_icmp = $proto_is_icmp->($proto);
2172 my $multidport = defined($rule->{dport
}) && parse_port_name_number_or_range
($rule->{dport
}, $is_icmp);
2173 my $multisport = defined($rule->{sport
}) && parse_port_name_number_or_range
($rule->{sport
}, 0);
2175 my $add_dport = sub {
2176 return if !defined($rule->{dport
});
2178 # NOTE: we re-use dport to store --icmp-type for icmp* protocol
2179 if ($proto eq 'icmp') {
2180 $is_valid_icmp_type->($rule->{dport
}, $icmp_type_names);
2181 push @match, "-m icmp --icmp-type $rule->{dport}";
2182 } elsif ($proto eq 'icmpv6') {
2183 $is_valid_icmp_type->($rule->{dport
}, $icmpv6_type_names);
2184 push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
2185 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
2186 die "protocol $proto does not have ports\n";
2187 } elsif ($multidport) {
2188 push @match, "--match multiport", "--dports $rule->{dport}";
2190 return if !$rule->{dport
};
2191 push @match, "--dport $rule->{dport}";
2195 my $add_sport = sub {
2196 return if !$rule->{sport
};
2198 die "protocol $proto does not have ports\n"
2199 if !$PROTOCOLS_WITH_PORTS->{$proto};
2201 push @match, "--match multiport", "--sports $rule->{sport}";
2203 push @match, "--sport $rule->{sport}";
2207 my $add_icmp_type = sub {
2208 return if !defined($rule->{'icmp-type'}) || $rule->{'icmp-type'} eq '';
2210 die "'icmp-type' can only be set if 'icmp', 'icmpv6' or 'ipv6-icmp' is specified\n"
2212 my $type = $proto eq 'icmp' ?
'icmp-type' : 'icmpv6-type';
2214 push @match, "-m $proto --$type $rule->{'icmp-type'}";
2217 # order matters - single port before multiport!
2219 $add_dport->() if $multisport;
2221 $add_dport->() if !$multisport;
2222 } elsif ($rule->{dport
} || $rule->{sport
}) {
2223 die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport
};
2224 die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport
};
2227 push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype
};
2229 my $matchstr = scalar(@match) ?
join(' ', @match) : "";
2232 if (defined $rule->{target
}) {
2233 $targetstr = $rule->{target
};
2235 my $action = (defined $rule->{action
}) ?
$rule->{action
} : "";
2236 $targetstr = $action eq 'PVEFW-SET-ACCEPT-MARK' ?
"-g $action" : "-j $action";
2240 my $log = $rule->{log};
2241 if (defined($log) && $log ne 'nolog') {
2242 my $loglevel = $log_level_hash->{$log};
2243 my $logaction = get_log_rule_base
($chain, $vmid, $rule->{logmsg
}, $loglevel);
2244 push @iptcmds, "-A $chain $matchstr $logaction";
2246 push @iptcmds, "-A $chain $matchstr $targetstr";
2250 sub ruleset_generate_rule
{
2251 my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf, $vmid) = @_;
2255 if ($rule->{macro}) {
2256 $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
2261 # update all or nothing
2263 foreach my $r (@$rules) {
2264 push @ipt_rule_cmds, ipt_rule_to_cmds
($r, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid);
2266 foreach my $c (@ipt_rule_cmds) {
2267 ruleset_add_ipt_cmd
($ruleset, $chain, $c);
2271 sub ruleset_create_chain
{
2272 my ($ruleset, $chain) = @_;
2274 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
2275 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
2277 die "chain '$chain' already exists\n" if $ruleset->{$chain};
2279 $ruleset->{$chain} = [];
2282 sub ruleset_chain_exist
{
2283 my ($ruleset, $chain) = @_;
2285 return $ruleset->{$chain} ?
1 : undef;
2288 # add an iptables command (like generated by ipt_rule_to_cmds) to a chain
2289 sub ruleset_add_ipt_cmd
{
2290 my ($ruleset, $chain, $iptcmd) = @_;
2292 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2294 push @{$ruleset->{$chain}}, $iptcmd;
2297 sub ruleset_addrule
{
2298 my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
2300 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2303 my $loglevel = $log_level_hash->{$log};
2304 my $logaction = get_log_rule_base
($chain, $vmid, $logmsg, $loglevel);
2305 push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
2307 # for stable ebtables digests avoid double-spaces to match ebtables-save output
2308 $match .= ' ' if length($match);
2309 push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
2312 sub ruleset_insertrule
{
2313 my ($ruleset, $chain, $match, $action, $log) = @_;
2315 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2317 unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2320 sub get_log_rule_base
{
2321 my ($chain, $vmid, $msg, $loglevel) = @_;
2323 $vmid = 0 if !defined($vmid);
2324 $msg = "" if !defined($msg);
2327 if (defined($global_log_ratelimit)) {
2328 $rlimit = "-m limit $global_log_ratelimit ";
2331 # Note: we use special format for prefix to pass further
2332 # info to log daemon (VMID, LOGLEVEL and CHAIN)
2333 return "${rlimit}-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2336 sub ruleset_add_chain_policy {
2337 my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2339 if ($policy eq 'ACCEPT') {
2341 my $rule = { action => 'ACCEPT' };
2342 rule_substitude_action($rule, { ACCEPT => $accept_action});
2343 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2345 } elsif ($policy eq 'DROP') {
2347 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop
");
2349 ruleset_addrule($ruleset, $chain, "", "-j DROP
", $loglevel, "policy
$policy: ", $vmid);
2350 } elsif ($policy eq 'REJECT') {
2351 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject
");
2353 ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject
", $loglevel, "policy
$policy: ", $vmid);
2356 die "internal error
: unknown policy
'$policy'";
2360 sub ruleset_chain_add_ndp {
2361 my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2362 return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2364 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-solicitation
", $accept);
2365 if ($direction ne 'OUT' || $options->{radv}) {
2366 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-advertisement
", $accept);
2368 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type neighbor-solicitation
", $accept);
2369 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type neighbor-advertisement
", $accept);
2372 sub ruleset_chain_add_conn_filters {
2373 my ($ruleset, $chain, $allow_invalid, $accept) = @_;
2375 if (!$allow_invalid) {
2376 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
", "-j DROP
");
2378 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate RELATED
,ESTABLISHED
", "-j
$accept");
2381 sub ruleset_chain_add_input_filters {
2382 my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2384 if ($cluster_conf->{ipset}->{blacklist}){
2385 if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist
")) {
2386 ruleset_create_chain($ruleset, "PVEFW-blacklist
");
2387 ruleset_addrule($ruleset, "PVEFW-blacklist
", "", "-j DROP
", $loglevel, "DROP
: ", 0);
2389 my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2390 ruleset_addrule($ruleset, $chain, "-m set
--match-set
${ipset_chain
} src
", "-j PVEFW-blacklist
");
2393 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2394 if ($ipversion == 4) {
2395 ruleset_addrule($ruleset, $chain, "-m conntrack
--ctstate INVALID
,NEW
", "-j PVEFW-smurfs
");
2399 if ($options->{tcpflags}) {
2400 ruleset_addrule($ruleset, $chain, "-p tcp
", "-j PVEFW-tcpflags
");
2404 sub ruleset_create_vm_chain {
2405 my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2407 ruleset_create_chain($ruleset, $chain);
2408 my $accept = generate_nfqueue($options);
2410 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2411 if ($ipversion == 4) {
2412 if ($direction eq 'OUT') {
2413 ruleset_generate_rule($ruleset, $chain, $ipversion,
2414 { action => 'PVEFW-SET-ACCEPT-MARK',
2415 proto => 'udp', sport => 68, dport => 67 });
2417 ruleset_generate_rule($ruleset, $chain, $ipversion,
2418 { action => 'ACCEPT',
2419 proto => 'udp', sport => 67, dport => 68 });
2421 } elsif ($ipversion == 6) {
2422 if ($direction eq 'OUT') {
2423 ruleset_generate_rule($ruleset, $chain, $ipversion,
2424 { action => 'PVEFW-SET-ACCEPT-MARK',
2425 proto => 'udp', sport => 546, dport => 547 });
2427 ruleset_generate_rule($ruleset, $chain, $ipversion,
2428 { action => 'ACCEPT',
2429 proto => 'udp', sport => 547, dport => 546 });
2435 if ($direction eq 'OUT') {
2436 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2437 ruleset_addrule($ruleset, $chain, "-m mac
! --mac-source
$macaddr", "-j DROP
");
2439 if ($ipversion == 6 && !$options->{radv}) {
2440 ruleset_addrule($ruleset, $chain, "-p icmpv6
--icmpv6-type router-advertisement
", "-j DROP
");
2442 if ($ipfilter_ipset) {
2443 ruleset_addrule($ruleset, $chain, "-m set
! --match-set
$ipfilter_ipset src
", "-j DROP
");
2445 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2448 my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j
$accept";
2449 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2452 sub ruleset_add_group_rule {
2453 my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2455 my $group = $rule->{action};
2456 my $group_chain = "GROUP-
$group-$direction";
2457 if(!ruleset_chain_exist($ruleset, $group_chain)){
2458 generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2461 if ($direction eq 'OUT' && $rule->{iface_out}) {
2462 ruleset_addrule($ruleset, $chain, "-o
$rule->{iface_out
}", "-j
$group_chain");
2463 } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2464 ruleset_addrule($ruleset, $chain, "-i
$rule->{iface_in
}", "-j
$group_chain");
2466 ruleset_addrule($ruleset, $chain, "", "-j
$group_chain");
2469 ruleset_addrule($ruleset, $chain, "-m mark
--mark
$FWACCEPTMARK_ON", "-j
$action");
2472 sub ruleset_generate_vm_rules {
2473 my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion, $vmid) = @_;
2475 my $lc_direction = lc($direction);
2477 my $in_accept = generate_nfqueue($options);
2479 foreach my $rule (@$rules) {
2480 next if $rule->{iface} && $rule->{iface} ne $netid;
2481 next if !$rule->{enable} || $rule->{errors};
2482 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2484 if ($rule->{type} eq 'group') {
2485 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2486 $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2488 next if $rule->{type} ne $lc_direction;
2490 $rule->{logmsg} = "$rule->{action
}: ";
2491 if ($direction eq 'OUT') {
2492 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" });
2493 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2495 rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject
" });
2496 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2504 sub generate_nfqueue {
2507 if ($options->{ips}) {
2508 my $action = "NFQUEUE
";
2509 if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2510 if (defined($3) && defined($1)) {
2511 $action .= " --queue-balance
$1:$3";
2512 } elsif (defined($1)) {
2513 $action .= " --queue-num
$1";
2516 $action .= " --queue-bypass
" if $feature_ipset_nomatch; #need kernel 3.10
2523 sub ruleset_generate_vm_ipsrules {
2524 my ($ruleset, $options, $direction, $iface) = @_;
2526 if ($options->{ips} && $direction eq 'IN') {
2527 my $nfqueue = generate_nfqueue($options);
2529 if (!ruleset_chain_exist($ruleset, "PVEFW-IPS
")) {
2530 ruleset_create_chain($ruleset, "PVEFW-IPS
");
2533 ruleset_addrule($ruleset, "PVEFW-IPS
", "-m physdev
--physdev-out
$iface --physdev-is-bridged
", "-j
$nfqueue");
2537 sub generate_tap_rules_direction {
2538 my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2540 my $lc_direction = lc($direction);
2542 my $rules = $vmfw_conf->{rules};
2544 my $options = $vmfw_conf->{options};
2545 my $loglevel = get_option_log_level($options, "log_level_
${lc_direction
}");
2547 my $tapchain = "$iface-$direction";
2549 my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2551 $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2552 if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2554 if ($options->{enable}) {
2555 # create chain with mac and ip filter
2556 ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2558 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion, $vmid);
2560 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2565 if ($direction eq 'OUT') {
2566 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2568 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2571 my $accept = generate_nfqueue($options);
2572 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : $accept;
2573 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2575 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK
" : 'ACCEPT';
2576 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2579 # plug the tap chain to bridge chain
2580 if ($direction eq 'IN') {
2581 ruleset_addrule($ruleset, "PVEFW-FWBR-IN
",
2582 "-m physdev
--physdev-is-bridged
--physdev-out
$iface", "-j
$tapchain");
2584 ruleset_addrule($ruleset, "PVEFW-FWBR-OUT
",
2585 "-m physdev
--physdev-is-bridged
--physdev-in
$iface", "-j
$tapchain");
2589 sub enable_host_firewall {
2590 my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf) = @_;
2592 my $options = $hostfw_conf->{options};
2593 my $cluster_options = $cluster_conf->{options};
2594 my $rules = $hostfw_conf->{rules};
2595 my $cluster_rules = $cluster_conf->{rules};
2597 # corosync preparation
2598 my $corosync_rule = "-p udp
--dport
5404:5405";
2599 my $corosync_local_addresses = {};
2600 my $multicast_enabled;
2601 my $local_hostname = PVE::INotify::nodename();
2602 if (defined($corosync_conf)) {
2603 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2604 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2606 if ($node_name eq $local_hostname) {
2607 $corosync_local_addresses->{$key} = $node_ip;
2611 # allow multicast only if enabled in config
2612 my $corosync_transport = $corosync_conf->{main}->{totem}->{transport};
2613 $multicast_enabled = defined($corosync_transport) && $corosync_transport eq 'udp';
2616 # host inbound firewall
2617 my $chain = "PVEFW-HOST-IN
";
2618 ruleset_create_chain($ruleset, $chain);
2620 my $loglevel = get_option_log_level($options, "log_level_in
");
2622 ruleset_addrule($ruleset, $chain, "-i lo
", "-j ACCEPT
");
2624 ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2625 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2626 ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2628 # we use RETURN because we need to check also tap rules
2629 my $accept_action = 'RETURN';
2631 ruleset_addrule($ruleset, $chain, "-p igmp
", "-j
$accept_action"); # important for multicast
2633 # add host rules first, so that cluster wide rules can be overwritten
2634 foreach my $rule (@$rules, @$cluster_rules) {
2635 next if !$rule->{enable} || $rule->{errors};
2636 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2638 $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2641 $rule->{logmsg} = "$rule->{action
}: ";
2642 if ($rule->{type} eq 'group') {
2643 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2644 } elsif ($rule->{type} eq 'in') {
2645 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" });
2646 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2650 delete $rule->{iface_in};
2653 # allow standard traffic for management ipset (includes cluster network)
2654 my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management
", $ipversion);
2655 my $mngmntsrc = "-m set
--match-set
${mngmnt_ipset_chain
} src
";
2656 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
8006", "-j
$accept_action"); # PVE API
2657 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
5900:5999", "-j
$accept_action"); # PVE VNC Console
2658 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
3128", "-j
$accept_action"); # SPICE Proxy
2659 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
22", "-j
$accept_action"); # SSH
2660 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp
--dport
60000:60050", "-j
$accept_action"); # Migration
2662 # corosync inbound rules
2663 if (defined($corosync_conf)) {
2664 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
$corosync_rule", "-j
$accept_action")
2665 if $multicast_enabled;
2667 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2668 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2669 my $destination = $corosync_local_addresses->{$key};
2671 if ($node_name ne $local_hostname && defined($destination)) {
2672 # accept only traffic on same ring
2673 ruleset_addrule($ruleset, $chain, "-d
$destination -s
$node_ip $corosync_rule", "-j
$accept_action");
2678 # implement input policy
2679 my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2680 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2682 # host outbound firewall
2683 $chain = "PVEFW-HOST-OUT
";
2684 ruleset_create_chain($ruleset, $chain);
2686 $loglevel = get_option_log_level($options, "log_level_out
");
2688 ruleset_addrule($ruleset, $chain, "-o lo
", "-j ACCEPT
");
2690 ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2692 # we use RETURN because we may want to check other thigs later
2693 $accept_action = 'RETURN';
2694 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j
$accept_action");
2696 ruleset_addrule($ruleset, $chain, "-p igmp
", "-j
$accept_action"); # important for multicast
2698 # add host rules first, so that cluster wide rules can be overwritten
2699 foreach my $rule (@$rules, @$cluster_rules) {
2700 next if !$rule->{enable} || $rule->{errors};
2701 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2703 $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2705 $rule->{logmsg} = "$rule->{action
}: ";
2706 if ($rule->{type} eq 'group') {
2707 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2708 } elsif ($rule->{type} eq 'out') {
2709 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject
" });
2710 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2714 delete $rule->{iface_out};
2717 # allow standard traffic on cluster network
2718 my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2719 my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2721 if ($localnet && ($ipversion == $localnet_ver)) {
2722 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
8006", "-j
$accept_action"); # PVE API
2723 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
22", "-j
$accept_action"); # SSH
2724 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
5900:5999", "-j
$accept_action"); # PVE VNC Console
2725 ruleset_addrule($ruleset, $chain, "-d
$localnet -p tcp
--dport
3128", "-j
$accept_action"); # SPICE Proxy
2728 # corosync outbound rules
2729 if (defined($corosync_conf)) {
2730 ruleset_addrule($ruleset, $chain, "-m addrtype
--dst-type MULTICAST
$corosync_rule", "-j
$accept_action")
2731 if $multicast_enabled;
2733 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2734 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2735 my $source = $corosync_local_addresses->{$key};
2737 if ($node_name ne $local_hostname && defined($source)) {
2738 # accept only traffic on same ring
2739 ruleset_addrule($ruleset, $chain, "-s
$source -d
$node_ip $corosync_rule", "-j
$accept_action");
2744 # implement output policy
2745 $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2746 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2748 ruleset_addrule($ruleset, "PVEFW-OUTPUT
", "", "-j PVEFW-HOST-OUT
");
2749 ruleset_addrule($ruleset, "PVEFW-INPUT
", "", "-j PVEFW-HOST-IN
");
2752 sub generate_group_rules {
2753 my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2755 my $rules = $cluster_conf->{groups}->{$group};
2758 warn "no such security group
'$group'\n";
2759 $rules = []; # create empty chain
2762 my $chain = "GROUP-
${group
}-IN
";
2764 ruleset_create_chain($ruleset, $chain);
2765 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2767 foreach my $rule (@$rules) {
2768 next if $rule->{type} ne 'in';
2769 next if !$rule->{enable} || $rule->{errors};
2770 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2771 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK
", REJECT => "PVEFW-reject
" });
2772 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2775 $chain = "GROUP-
${group
}-OUT
";
2777 ruleset_create_chain($ruleset, $chain);
2778 ruleset_addrule($ruleset, $chain, "", "-j MARK
--set-mark
$FWACCEPTMARK_OFF"); # clear mark
2780 foreach my $rule (@$rules) {
2781 next if $rule->{type} ne 'out';
2782 next if !$rule->{enable} || $rule->{errors};
2783 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2784 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2785 # check also other tap rules later
2786 rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject
" });
2787 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2792 my $valid_netdev_names = {};
2793 for (my $i = 0; $i < $MAX_NETS; $i++) {
2794 $valid_netdev_names->{"net
$i"} = 1;
2797 sub get_mark_values {
2798 my ($value, $mask) = @_;
2799 $value = hex($value) if $value =~ /^0x/;
2800 $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2801 $mask = 0xffffffff if !defined($mask);
2802 return ($value, $mask);
2806 my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env) = @_;
2808 my $orig_line = $line;
2812 # we can add single line comments to the end of the rule
2813 if ($line =~ s/#\s*(.*?)\s*$//) {
2814 $rule->{comment} = decode('utf8', $1);
2817 # we can disable a rule when prefixed with '|'
2819 $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2821 $line =~ s/^(\S+)\s+(\S+)\s*// ||
2822 die "unable to parse rule
: $line\n";
2824 $rule->{type} = lc($1);
2825 $rule->{action} = $2;
2827 if ($rule->{type} eq 'in' || $rule->{type} eq 'out') {
2828 if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2829 $rule->{macro} = $1;
2830 $rule->{action} = $2;
2834 while (length($line)) {
2835 if ($line =~ s/^-i (\S+)\s*//) {
2836 $rule->{iface} = $1;
2840 last if $rule->{type} eq 'group';
2842 if ($line =~ s/^(?:-p|--?proto) (\S+)\s*//) {
2843 $rule->{proto} = $1;
2847 if ($line =~ s/^--?dport (\S+)\s*//) {
2848 $rule->{dport} = $1;
2852 if ($line =~ s/^--?sport (\S+)\s*//) {
2853 $rule->{sport} = $1;
2856 if ($line =~ s/^--?source (\S+)\s*//) {
2857 $rule->{source} = $1;
2860 if ($line =~ s/^--?dest (\S+)\s*//) {
2864 if ($line =~ s/^--?log (emerg|alert|crit|err|warning|notice|info|debug|nolog)\s*//) {
2868 if ($line =~ s/^--?icmp-type (\S+)\s*//) {
2869 $rule->{'icmp-type'} = $1;
2876 die "unable to parse rule parameters
: $line\n" if length($line);
2878 $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2879 if ($rule->{errors}) {
2880 # The verbose flag really means we're running from the CLI and want
2881 # output on the console - in the other case we really want such errors
2882 # to go into the syslog instead.
2883 my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2884 $log->("$prefix - errors
in rule parameters
: $orig_line\n");
2885 foreach my $p (keys %{$rule->{errors}}) {
2886 $log->(" $p: $rule->{errors
}->{$p}\n");
2893 sub verify_ethertype {
2895 my $types = get_etc_ethertypes();
2896 die "unknown ethernet protocol type
: $value\n"
2897 if !defined($types->{byname}->{$value}) &&
2898 !defined($types->{byid}->{$value});
2901 sub parse_vmfw_option {
2906 my $loglevels = "emerg
|alert
|crit
|err
|warning
|notice
|info
|debug
|nolog
";
2908 if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2911 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2913 $value = $2 ? lc($3) : '';
2914 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2917 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2920 } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
2923 verify_ethertype($_) foreach split(/\s*,\s*/, $value);
2925 die "can
't parse option '$line'\n"
2928 return ($opt, $value);
2931 sub parse_hostfw_option {
2936 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2938 if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid|protection_synflood|nftables):\s*(0|1)\s*$/i) {
2941 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2943 $value = $2 ? lc($3) : '';
2944 } elsif ($line =~ m/^(nf_conntrack_helpers):\s*(((\S+)[,]?)+)\s*$/i) {
2947 pve_fw_verify_conntrack_helper($value);
2948 } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established|nf_conntrack_tcp_timeout_syn_recv|protection_synflood_rate|protection_synflood_burst|protection_limit):\s*(\d+)\s*$/i) {
2952 die "can't parse option
'$line'\n"
2955 return ($opt, $value);
2958 sub parse_clusterfw_option {
2963 if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2966 if (($value > 1) && ((time() - $value) > 60)) {
2969 } elsif ($line =~ m/^(ebtables):\s*(0|1)\s*$/i) {
2972 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2975 } elsif ($line =~ m/^(log_ratelimit):\s*(\S+)\s*$/) {
2979 die "can
't parse option '$line'\n"
2982 return ($opt, $value);
2986 my ($clusterfw_conf, $fw_conf, $cidr, $scope) = @_;
2988 # When we're on the cluster level
, the cluster config only gets
2989 # saved into fw_conf, so we need some extra handling here (to
2991 my ($cluster_config, $local_config);
2992 if (!$clusterfw_conf) {
2993 ($cluster_config, $local_config) = ($fw_conf, undef);
2995 ($cluster_config, $local_config) = ($clusterfw_conf, $fw_conf);
2998 my $alias = lc($cidr);
3000 if ($scope ne 'dc/' && $local_config) {
3001 $e = $local_config->{aliases
}->{$alias};
3003 if ($scope ne 'guest/' && !$e && $cluster_config) {
3004 $e = $cluster_config->{aliases
}->{$alias};
3007 die "no such alias '$cidr'\n" if !$e;;
3009 return wantarray ?
($e->{cidr
}, $e->{ipversion
}) : $e->{cidr
};
3012 sub parse_ip_or_cidr
{
3017 if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
3020 } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
3024 die "value does not look like a valid IP address or CIDR network\n";
3027 return wantarray ?
($cidr, $ipversion) : $cidr;
3033 # we can add single line comments to the end of the line
3034 my $comment = $line =~ s/\s*#\s*(.*?)\s*$// ? decode
('utf8', $1) : undef;
3036 if ($line =~ m/^(\S+)\s(\S+)$/) {
3037 my ($name, $cidr) = ($1, $2);
3040 ($cidr, $ipversion) = parse_ip_or_cidr
($cidr);
3045 ipversion
=> $ipversion,
3047 $data->{comment
} = $comment if $comment;
3054 sub generic_fw_config_parser
{
3055 my ($filename, $cluster_conf, $empty_conf, $rule_env) = @_;
3060 my $res = $empty_conf;
3063 if ($filename =~ m!^/etc/pve/(.*)$!) {
3064 $raw = PVE
::Cluster
::get_config
($1);
3066 $raw = eval { PVE
::Tools
::file_get_contents
($filename) }; # ignore errors
3070 my $curr_group_keys = {};
3073 while ($raw =~ /^\h*(.*?)\h*$/gm) {
3076 next if $line =~ m/^#/;
3077 next if $line =~ m/^\s*$/;
3080 my $prefix = "$filename (line $linenr)";
3082 if ($empty_conf->{options
} && ($line =~ m/^\[options\]$/i)) {
3083 $section = 'options';
3087 if ($empty_conf->{aliases
} && ($line =~ m/^\[aliases\]$/i)) {
3088 $section = 'aliases';
3092 if ($empty_conf->{groups
} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
3093 $section = 'groups';
3097 die "security group name too long\n" if length($group) > $max_group_name_length;
3098 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
3101 ($section, $group, $comment) = undef;
3102 warn "$prefix: $err";
3106 $res->{$section}->{$group} = [];
3107 $res->{group_comments
}->{$group} = decode
('utf8', $comment)
3112 if ($empty_conf->{rules
} && ($line =~ m/^\[rules\]$/i)) {
3117 if ($empty_conf->{ipset
} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
3122 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
3123 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
3126 ($section, $group, $comment) = undef;
3127 warn "$prefix: $err";
3131 $res->{$section}->{$group} = [];
3132 $curr_group_keys = {};
3134 $res->{ipset_comments
}->{$group} = decode
('utf8', $comment)
3140 warn "$prefix: skip line - no section\n";
3144 if ($section eq 'options') {
3147 if ($rule_env eq 'cluster') {
3148 ($opt, $value) = parse_clusterfw_option
($line);
3149 } elsif ($rule_env eq 'host') {
3150 ($opt, $value) = parse_hostfw_option
($line);
3152 ($opt, $value) = parse_vmfw_option
($line);
3154 $res->{options
}->{$opt} = $value;
3156 warn "$prefix: $@" if $@;
3157 } elsif ($section eq 'aliases') {
3159 my $data = parse_alias
($line);
3160 $res->{aliases
}->{lc($data->{name
})} = $data;
3162 warn "$prefix: $@" if $@;
3163 } elsif ($section eq 'rules') {
3165 eval { $rule = parse_fw_rule
($prefix, $line, $cluster_conf, $res, $rule_env); };
3167 warn "$prefix: $err";
3170 push @{$res->{$section}}, $rule;
3171 } elsif ($section eq 'groups') {
3173 eval { $rule = parse_fw_rule
($prefix, $line, $cluster_conf, undef, 'group'); };
3175 warn "$prefix: $err";
3178 push @{$res->{$section}->{$group}}, $rule;
3179 } elsif ($section eq 'ipset') {
3180 # we can add single line comments to the end of the rule
3181 my $comment = $line =~ s/#\s*(.*?)\s*$// ? decode
('utf8', $1) : undef;
3183 $line =~ m/^(\!)?\s*(\S+)\s*$/;
3188 if ($nomatch && !$feature_ipset_nomatch) {
3189 $errors->{nomatch
} = "nomatch not supported by kernel";
3193 if ($cidr =~ m
@^(dc
/|guest/)?
(${ip_alias_pattern
}$)@) {
3194 my $scope = $1 // "";
3196 resolve_alias
($cluster_conf, $res, $alias, $scope); # make sure alias exists
3198 $cidr = parse_ip_or_cidr
($cidr);
3200 die "duplicate ipset entry for '$cidr'\n"
3201 if defined($curr_group_keys->{$cidr});
3205 $errors->{cidr
} = $err;
3208 if ($cidr =~ m!/0+$!) {
3209 $errors->{cidr
} = "a zero prefix is not allowed in ipset entries\n";
3212 my $entry = { cidr
=> $cidr };
3213 $entry->{nomatch
} = 1 if $nomatch;
3214 $entry->{comment
} = $comment if $comment;
3215 $entry->{errors
} = $errors if $errors;
3217 if ($verbose && $errors) {
3218 warn "$prefix - errors in ipset '$group': $line\n";
3219 foreach my $p (keys %{$errors}) {
3220 warn " $p: $errors->{$p}\n";
3224 push @{$res->{$section}->{$group}}, $entry;
3225 $curr_group_keys->{$cidr} = 1;
3227 warn "$prefix: skip line - unknown section\n";
3235 # this is only used to prevent concurrent runs of rule compilation/application
3236 # see lock_*_conf for cfs locks protectiong config modification
3238 my ($code, @param) = @_;
3242 my $res = lock_file
($pve_fw_lock_filename, $timeout, $code, @param);
3249 sub read_local_vm_config
{
3254 my $vmdata = { qemu
=> $qemu, lxc
=> $lxc };
3256 my $vmlist = PVE
::Cluster
::get_vmlist
();
3257 return $vmdata if !$vmlist || !$vmlist->{ids
};
3258 my $ids = $vmlist->{ids
};
3260 foreach my $vmid (keys %$ids) {
3261 next if !$vmid; # skip VE0
3262 my $d = $ids->{$vmid};
3263 next if !$d->{node
} || $d->{node
} ne $nodename;
3264 next if !$d->{type
};
3265 if ($d->{type
} eq 'qemu') {
3266 if ($have_qemu_server) {
3267 my $cfspath = PVE
::QemuConfig-
>cfs_config_path($vmid);
3268 if (my $conf = PVE
::Cluster
::cfs_read_file
($cfspath)) {
3269 $qemu->{$vmid} = $conf;
3272 } elsif ($d->{type
} eq 'lxc') {
3274 my $cfspath = PVE
::LXC
::Config-
>cfs_config_path($vmid);
3275 if (my $conf = PVE
::Cluster
::cfs_read_file
($cfspath)) {
3276 $lxc->{$vmid} = $conf;
3285 # FIXME: move use sites over to moved helper and break older packages, then remove this here
3286 sub lock_vmfw_conf
{
3287 return PVE
::Firewall
::Helpers
::lock_vmfw_conf
(@_);
3290 sub load_vmfw_conf
{
3291 my ($cluster_conf, $rule_env, $vmid, $dir) = @_;
3293 $dir = $pvefw_conf_dir if !defined($dir);
3294 my $filename = "$dir/$vmid.fw";
3301 ipset_comments
=> {},
3304 my $vmfw_conf = generic_fw_config_parser
($filename, $cluster_conf, $empty_conf, $rule_env);
3305 $vmfw_conf->{vmid
} = $vmid;
3310 my $format_rules = sub {
3311 my ($rules, $allow_iface) = @_;
3315 foreach my $rule (@$rules) {
3316 if ($rule->{type
} eq 'in' || $rule->{type
} eq 'out' || $rule->{type
} eq 'group') {
3317 $raw .= '|' if defined($rule->{enable
}) && !$rule->{enable
};
3318 $raw .= uc($rule->{type
});
3319 if ($rule->{macro}) {
3320 $raw .= " $rule->{macro}($rule->{action})";
3322 $raw .= " " . $rule->{action
};
3324 if ($allow_iface && $rule->{iface
}) {
3325 $raw .= " -i $rule->{iface}";
3328 if ($rule->{type
} ne 'group') {
3329 $raw .= " -source $rule->{source}" if $rule->{source
};
3330 $raw .= " -dest $rule->{dest}" if $rule->{dest
};
3331 $raw .= " -p $rule->{proto}" if $rule->{proto
};
3332 $raw .= " -dport $rule->{dport}" if $rule->{dport
};
3333 $raw .= " -sport $rule->{sport}" if $rule->{sport
};
3334 $raw .= " -log $rule->{log}" if $rule->{log};
3335 $raw .= " -icmp-type $rule->{'icmp-type'}" if defined($rule->{'icmp-type'}) && $rule->{'icmp-type'} ne '';
3338 $raw .= " # " . encode
('utf8', $rule->{comment
})
3339 if $rule->{comment
} && $rule->{comment
} !~ m/^\s*$/;
3342 die "unknown rule type '$rule->{type}'";
3349 my $format_options = sub {
3354 $raw .= "[OPTIONS]\n\n";
3355 foreach my $opt (keys %$options) {
3356 $raw .= "$opt: $options->{$opt}\n";
3363 my $format_aliases = sub {
3368 $raw .= "[ALIASES]\n\n";
3369 foreach my $k (sort keys %$aliases) {
3370 my $e = $aliases->{$k};
3371 $raw .= "$e->{name} $e->{cidr}";
3372 $raw .= " # " . encode
('utf8', $e->{comment
})
3373 if $e->{comment
} && $e->{comment
} !~ m/^\s*$/;
3381 my $format_ipsets = sub {
3386 foreach my $ipset (sort keys %{$fw_conf->{ipset
}}) {
3387 if (my $comment = $fw_conf->{ipset_comments
}->{$ipset}) {
3388 my $utf8comment = encode
('utf8', $comment);
3389 $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3391 $raw .= "[IPSET $ipset]\n\n";
3393 my $options = $fw_conf->{ipset
}->{$ipset};
3396 foreach my $entry (@$options) {
3397 my $cidr = $entry->{cidr
};
3398 if (defined($nethash->{$cidr})) {
3399 warn "ignoring duplicate ipset entry '$cidr'\n";
3403 $nethash->{$cidr} = $entry;
3406 foreach my $cidr (sort keys %$nethash) {
3407 my $entry = $nethash->{$cidr};
3408 my $line = $entry->{nomatch
} ?
'!' : '';
3409 $line .= $entry->{cidr
};
3410 $line .= " # " . encode
('utf8', $entry->{comment
})
3411 if $entry->{comment
} && $entry->{comment
} !~ m/^\s*$/;
3421 sub save_vmfw_conf
{
3422 my ($vmid, $vmfw_conf) = @_;
3426 my $options = $vmfw_conf->{options
};
3427 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3429 my $aliases = $vmfw_conf->{aliases
};
3430 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3432 $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset
};
3434 my $rules = $vmfw_conf->{rules
} || [];
3435 if ($rules && scalar(@$rules)) {
3436 $raw .= "[RULES]\n\n";
3437 $raw .= &$format_rules($rules, 1);
3441 my $filename = "$pvefw_conf_dir/$vmid.fw";
3443 mkdir $pvefw_conf_dir;
3444 PVE
::Tools
::file_set_contents
($filename, $raw);
3450 # FIXME: remove with 8.0 and break older qemu-server/pve-container
3451 sub remove_vmfw_conf
{
3452 return PVE
::Firewall
::Helpers
::remove_vmfw_conf
(@_);
3455 # FIXME: remove with 8.0 and break older qemu-server/pve-container
3456 sub clone_vmfw_conf
{
3457 return PVE
::Firewall
::Helpers
::clone_vmfw_conf
(@_);
3460 sub read_vm_firewall_configs
{
3461 my ($cluster_conf, $vmdata, $dir) = @_;
3463 my $vmfw_configs = {};
3465 foreach my $vmid (keys %{$vmdata->{qemu
}}) {
3466 my $vmfw_conf = load_vmfw_conf
($cluster_conf, 'vm', $vmid, $dir);
3467 next if !$vmfw_conf->{options
}; # skip if file does not exist
3468 $vmfw_configs->{$vmid} = $vmfw_conf;
3470 foreach my $vmid (keys %{$vmdata->{lxc
}}) {
3471 my $vmfw_conf = load_vmfw_conf
($cluster_conf, 'ct', $vmid, $dir);
3472 next if !$vmfw_conf->{options
}; # skip if file does not exist
3473 $vmfw_configs->{$vmid} = $vmfw_conf;
3476 return $vmfw_configs;
3479 sub get_option_log_level
{
3480 my ($options, $k) = @_;
3482 my $v = $options->{$k};
3483 $v = $default_log_level if !defined($v);
3485 return undef if $v eq '' || $v eq 'nolog';
3487 return $v if defined($log_level_hash->{$v});
3489 warn "unknown log level ($k = '$v')\n";
3494 sub generate_std_chains
{
3495 my ($ruleset, $options, $ipversion) = @_;
3497 my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3499 my $loglevel = get_option_log_level
($options, 'smurf_log_level');
3500 my $chain = 'PVEFW-smurflog';
3501 if ( $std_chains->{$chain} ) {
3502 foreach my $r (@{$std_chains->{$chain}}) {
3503 $r->{log} = $loglevel;
3507 # same as shorewall logflags action.
3508 $loglevel = get_option_log_level
($options, 'tcp_flags_log_level');
3509 $chain = 'PVEFW-logflags';
3510 if ( $std_chains->{$chain} ) {
3511 foreach my $r (@{$std_chains->{$chain}}) {
3512 $r->{log} = $loglevel;
3516 foreach my $chain (keys %$std_chains) {
3517 ruleset_create_chain
($ruleset, $chain);
3518 foreach my $rule (@{$std_chains->{$chain}}) {
3520 ruleset_generate_rule
($ruleset, $chain, $ipversion, $rule, 0);
3522 die "rule $rule as string - should not happen";
3528 sub generate_ipset_chains
{
3529 my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3531 foreach my $ipset (keys %{$ipsets}) {
3533 my $options = $ipsets->{$ipset};
3535 if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3536 if (my $ips = $device_ips->{$1}) {
3537 $options = [@$options, @$ips];
3543 foreach my $entry (@$options) {
3544 next if $entry->{errors
}; # skip entries with errors
3547 if ($entry->{cidr
} =~ m
@^(dc
/|guest/)?
(${ip_alias_pattern
})$@) {
3548 my $scope = $1 // "";
3550 ($cidr, $ver) = resolve_alias
($clusterfw_conf, $fw_conf, $alias, $scope);
3552 ($cidr, $ver) = parse_ip_or_cidr
($entry->{cidr
});
3554 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3556 # ip_compress_address takes an address only, no CIDR
3557 my ($addr, $prefix_len) = ($cidr =~ m
@^([^/]*)(/.*)?
$@);
3558 $cidr = lc(Net
::IP
::ip_compress_address
($addr, 6));
3559 $cidr .= $prefix_len if defined($prefix_len);
3565 $nethash->{$ver}->{$cidr} = { cidr
=> $cidr, nomatch
=> $entry->{nomatch
} };
3570 foreach my $ipversion (4, 6) {
3571 my $data = $nethash->{$ipversion};
3573 my $name = compute_ipset_chain_name
($fw_conf->{vmid
}, $ipset, $ipversion);
3575 my $hashsize = scalar(@$options);
3576 if ($hashsize <= 64) {
3579 $hashsize = round_powerof2
($hashsize);
3582 my $bucketsize = 12; # lower than the default of 14, faster but slightly more memory use
3584 my $family = $ipversion == "6" ?
"inet6" : "inet";
3586 $ipset_ruleset->{$name} = [
3587 "create $name hash:net family $family hashsize $hashsize maxelem $hashsize bucketsize $bucketsize"
3590 foreach my $cidr (sort keys %$data) {
3591 my $entry = $data->{$cidr};
3593 my $cmd = "add $name $cidr";
3594 if ($entry->{nomatch
}) {
3595 if ($feature_ipset_nomatch) {
3596 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3598 warn "ignore !$cidr - nomatch not supported by kernel\n";
3601 push @{$ipset_ruleset->{$name}}, $cmd;
3608 sub round_powerof2
{
3612 $int |= $int >> $_ foreach (1,2,4,8,16);
3616 my $set_global_log_ratelimit = sub {
3617 my $cluster_opts = shift;
3619 $global_log_ratelimit = '--limit 1/sec';
3620 if (defined(my $log_rlimit = $cluster_opts->{log_ratelimit
})) {
3621 my $ll_format = $cluster_option_properties->{log_ratelimit
}->{format
};
3622 my $limit = PVE
::JSONSchema
::parse_property_string
($ll_format, $log_rlimit);
3624 if ($limit->{enable
}) {
3625 if (my $rate = $limit->{rate
}) {
3626 $global_log_ratelimit = "--limit $rate";
3628 if (my $burst = $limit->{burst
}) {
3629 $global_log_ratelimit .= " --limit-burst $burst";
3632 $global_log_ratelimit = undef;
3637 sub lock_clusterfw_conf
{
3638 my ($timeout, $code, @param) = @_;
3640 my $res = PVE
::Cluster
::cfs_lock_firewall
("cluster", $timeout, $code, @param);
3646 sub load_clusterfw_conf
{
3647 my ($filename) = @_;
3649 $filename = $clusterfw_conf_filename if !defined($filename);
3655 group_comments
=> {},
3657 ipset_comments
=> {},
3660 my $cluster_conf = generic_fw_config_parser
($filename, $empty_conf, $empty_conf, 'cluster');
3661 $set_global_log_ratelimit->($cluster_conf->{options
});
3663 return $cluster_conf;
3666 sub save_clusterfw_conf
{
3667 my ($cluster_conf) = @_;
3671 my $options = $cluster_conf->{options
};
3672 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3674 my $aliases = $cluster_conf->{aliases
};
3675 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3677 $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset
};
3679 my $rules = $cluster_conf->{rules
};
3680 if ($rules && scalar(@$rules)) {
3681 $raw .= "[RULES]\n\n";
3682 $raw .= &$format_rules($rules, 1);
3686 if ($cluster_conf->{groups
}) {
3687 foreach my $group (sort keys %{$cluster_conf->{groups
}}) {
3688 my $rules = $cluster_conf->{groups
}->{$group};
3689 if (my $comment = $cluster_conf->{group_comments
}->{$group}) {
3690 my $utf8comment = encode
('utf8', $comment);
3691 $raw .= "[group $group] # $utf8comment\n\n";
3693 $raw .= "[group $group]\n\n";
3696 $raw .= &$format_rules($rules, 0);
3702 mkdir $pvefw_conf_dir;
3703 PVE
::Tools
::file_set_contents
($clusterfw_conf_filename, $raw);
3705 unlink $clusterfw_conf_filename;
3709 sub lock_hostfw_conf
: prototype($$$@) {
3710 my ($node, $timeout, $code, @param) = @_;
3712 $node = $nodename if !defined($node);
3714 my $res = PVE
::Cluster
::cfs_lock_firewall
("host-$node", $timeout, $code, @param);
3720 sub load_hostfw_conf
{
3721 my ($cluster_conf, $filename) = @_;
3723 $filename = $hostfw_conf_filename if !defined($filename);
3725 my $empty_conf = { rules
=> [], options
=> {}};
3726 return generic_fw_config_parser
($filename, $cluster_conf, $empty_conf, 'host');
3729 sub save_hostfw_conf
{
3730 my ($hostfw_conf, $filename) = @_;
3732 $filename = $hostfw_conf_filename if !defined($filename);
3736 my $options = $hostfw_conf->{options
};
3737 $raw .= &$format_options($options) if $options && scalar(keys %$options);
3739 my $rules = $hostfw_conf->{rules
};
3740 if ($rules && scalar(@$rules)) {
3741 $raw .= "[RULES]\n\n";
3742 $raw .= &$format_rules($rules, 1);
3747 PVE
::Tools
::file_set_contents
($filename, $raw);
3754 my ($cluster_conf, $hostfw_conf, $vmdata, $corosync_conf) = @_;
3758 # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3759 $pve_std_chains = dclone
($pve_std_chains_conf);
3761 if ($vmdata) { # test mode
3762 my $testdir = $vmdata->{testdir
} || die "no test directory specified";
3763 my $filename = "$testdir/cluster.fw";
3764 $cluster_conf = load_clusterfw_conf
($filename);
3766 $filename = "$testdir/host.fw";
3767 $hostfw_conf = load_hostfw_conf
($cluster_conf, $filename);
3769 $vmfw_configs = read_vm_firewall_configs
($cluster_conf, $vmdata, $testdir);
3770 } else { # normal operation
3771 $cluster_conf = load_clusterfw_conf
(undef) if !$cluster_conf;
3773 $hostfw_conf = load_hostfw_conf
($cluster_conf, undef) if !$hostfw_conf;
3775 # cfs_update is handled by daemon or API
3776 $corosync_conf = PVE
::Cluster
::cfs_read_file
("corosync.conf")
3777 if !defined($corosync_conf) && PVE
::Corosync
::check_conf_exists
(1);
3779 $vmdata = read_local_vm_config
();
3780 $vmfw_configs = read_vm_firewall_configs
($cluster_conf, $vmdata, undef);
3783 return ({},{},{},{}) if !$cluster_conf->{options
}->{enable
};
3786 if ($cluster_conf->{aliases
}->{local_network
}) {
3787 $localnet = $cluster_conf->{aliases
}->{local_network
}->{cidr
};
3790 ($localnet, $localnet_ver) = parse_ip_or_cidr
(local_network
() || '127.0.0.0/8');
3792 $cluster_conf->{aliases
}->{local_network
} = {
3793 name
=> 'local_network', cidr
=> $localnet, ipversion
=> $localnet_ver };
3796 push @{$cluster_conf->{ipset
}->{management
}}, { cidr
=> $localnet };
3800 $ruleset->{filter
} = compile_iptables_filter
($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3801 $ruleset->{raw
} = compile_iptables_raw
($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3802 $rulesetv6->{filter
} = compile_iptables_filter
($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
3803 $rulesetv6->{raw
} = compile_iptables_raw
($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
3804 my $ebtables_ruleset = compile_ebtables_filter
($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata);
3805 my $ipset_ruleset = compile_ipsets
($cluster_conf, $vmfw_configs, $vmdata);
3807 return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
3810 sub compile_iptables_raw
{
3811 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
3815 my $hostfw_options = $hostfw_conf->{options
} || {};
3816 my $protection_synflood = $hostfw_options->{protection_synflood
} || 0;
3817 my $conntrack_helpers = $hostfw_options->{nf_conntrack_helpers
} || '';
3819 ruleset_create_chain
($ruleset, "PVEFW-PREROUTING") if $protection_synflood != 0 || $conntrack_helpers ne '';
3821 if($protection_synflood) {
3823 my $protection_synflood_rate = $hostfw_options->{protection_synflood_rate
} ?
$hostfw_options->{protection_synflood_rate
} : 200;
3824 my $protection_synflood_burst = $hostfw_options->{protection_synflood_burst
} ?
$hostfw_options->{protection_synflood_burst
} : 1000;
3825 my $protection_synflood_limit = $hostfw_options->{protection_synflood_limit
} ?
$hostfw_options->{protection_synflood_limit
} : 3000;
3826 my $protection_synflood_expire = $hostfw_options->{nf_conntrack_tcp_timeout_syn_recv
} ?
$hostfw_options->{nf_conntrack_tcp_timeout_syn_recv
} : 60;
3827 $protection_synflood_expire = $protection_synflood_expire * 1000;
3828 my $protection_synflood_mask = $ipversion == 4 ?
32 : 64;
3830 ruleset_addrule
($ruleset, "PVEFW-PREROUTING", "-p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -m hashlimit --hashlimit-above $protection_synflood_rate/sec --hashlimit-burst $protection_synflood_burst --hashlimit-mode srcip --hashlimit-name syn --hashlimit-htable-size 2097152 --hashlimit-srcmask $protection_synflood_mask --hashlimit-htable-expire $protection_synflood_expire", "-j DROP");
3833 foreach my $conntrack_helper (split(/,/, $conntrack_helpers)) {
3834 my $helper = $pve_fw_helpers->{$conntrack_helper};
3835 ruleset_addrule
($ruleset, "PVEFW-PREROUTING", "-p $helper->{proto} -m $helper->{proto} --dport $helper->{dport} -j CT", "--helper $conntrack_helper") if $helper && $helper->{"v$ipversion"};
3841 sub compile_iptables_filter
{
3842 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
3846 ruleset_create_chain
($ruleset, "PVEFW-INPUT");
3847 ruleset_create_chain
($ruleset, "PVEFW-OUTPUT");
3849 ruleset_create_chain
($ruleset, "PVEFW-FORWARD");
3851 my $hostfw_options = $hostfw_conf->{options
} || {};
3853 # fixme: what log level should we use here?
3854 my $loglevel = get_option_log_level
($hostfw_options, "log_level_out");
3856 my $conn_allow_invalid = $hostfw_options->{nf_conntrack_allow_invalid
} // 0;
3857 ruleset_chain_add_conn_filters
($ruleset, "PVEFW-FORWARD", $conn_allow_invalid, "ACCEPT");
3859 ruleset_create_chain
($ruleset, "PVEFW-FWBR-IN");
3860 ruleset_chain_add_input_filters
($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3862 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3864 ruleset_create_chain
($ruleset, "PVEFW-FWBR-OUT");
3865 ruleset_addrule
($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3867 generate_std_chains
($ruleset, $hostfw_options, $ipversion);
3869 my $hostfw_enable = !(defined($hostfw_options->{enable
}) && ($hostfw_options->{enable
} == 0));
3871 if ($hostfw_enable) {
3872 eval { enable_host_firewall
($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf); };
3873 warn $@ if $@; # just to be sure - should not happen
3876 # generate firewall rules for QEMU VMs
3877 foreach my $vmid (sort keys %{$vmdata->{qemu
}}) {
3879 my $conf = $vmdata->{qemu
}->{$vmid};
3880 my $vmfw_conf = $vmfw_configs->{$vmid};
3881 return if !$vmfw_conf || !$vmfw_conf->{options
}->{enable
};
3883 foreach my $netid (sort keys %$conf) {
3884 next if $netid !~ m/^net(\d+)$/;
3885 my $net = PVE
::QemuServer
::parse_net
($conf->{$netid});
3886 next if !$net->{firewall
};
3888 my $iface = "tap${vmid}i$1";
3889 my $macaddr = $net->{macaddr
};
3890 generate_tap_rules_direction
($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3891 $vmfw_conf, $vmid, 'IN', $ipversion);
3892 generate_tap_rules_direction
($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3893 $vmfw_conf, $vmid, 'OUT', $ipversion);
3896 warn $@ if $@; # just to be sure - should not happen
3899 # generate firewall rules for LXC containers
3900 foreach my $vmid (sort keys %{$vmdata->{lxc
}}) {
3902 my $conf = $vmdata->{lxc
}->{$vmid};
3903 my $vmfw_conf = $vmfw_configs->{$vmid};
3904 return if !$vmfw_conf || !$vmfw_conf->{options
}->{enable
};
3906 foreach my $netid (sort keys %$conf) {
3907 next if $netid !~ m/^net(\d+)$/;
3908 my $net = PVE
::LXC
::Config-
>parse_lxc_network($conf->{$netid});
3909 next if !$net->{firewall
};
3911 my $iface = "veth${vmid}i$1";
3912 my $macaddr = $net->{hwaddr
};
3913 generate_tap_rules_direction
($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3914 $vmfw_conf, $vmid, 'IN', $ipversion);
3915 generate_tap_rules_direction
($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3916 $vmfw_conf, $vmid, 'OUT', $ipversion);
3919 warn $@ if $@; # just to be sure - should not happen
3922 if (ruleset_chain_exist
($ruleset, "PVEFW-IPS")){
3923 ruleset_insertrule
($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3929 sub mac_to_linklocal
{
3931 my @parts = split(/:/, $macaddr);
3932 # The standard link local address uses the fe80::/64 prefix with the
3933 # modified EUI-64 identifier derived from the MAC address by flipping the
3934 # universal/local bit and inserting FF:FE in the middle.
3936 $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3937 my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3938 return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3941 sub compile_ipsets
{
3942 my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3945 if ($cluster_conf->{aliases
}->{local_network
}) {
3946 $localnet = $cluster_conf->{aliases
}->{local_network
}->{cidr
};
3949 ($localnet, $localnet_ver) = parse_ip_or_cidr
(local_network
() || '127.0.0.0/8');
3951 $cluster_conf->{aliases
}->{local_network
} = {
3952 name
=> 'local_network', cidr
=> $localnet, ipversion
=> $localnet_ver };
3955 push @{$cluster_conf->{ipset
}->{management
}}, { cidr
=> $localnet };
3958 my $ipset_ruleset = {};
3960 # generate ipsets for QEMU VMs
3961 foreach my $vmid (keys %{$vmdata->{qemu
}}) {
3963 my $conf = $vmdata->{qemu
}->{$vmid};
3964 my $vmfw_conf = $vmfw_configs->{$vmid};
3965 return if !$vmfw_conf;
3967 # When the 'ipfilter' option is enabled every device for which there
3968 # is no 'ipfilter-netX' ipset defined gets an implicit empty default
3970 # The reason is that ipfilter ipsets are always filled with standard
3971 # IPv6 link-local filters.
3972 my $ipsets = $vmfw_conf->{ipset
};
3973 my $implicit_sets = {};
3975 my $device_ips = {};
3976 foreach my $netid (keys %$conf) {
3977 next if $netid !~ m/^net(\d+)$/;
3978 my $net = PVE
::QemuServer
::parse_net
($conf->{$netid});
3979 next if !$net->{firewall
};
3981 if ($vmfw_conf->{options
}->{ipfilter
} && !$ipsets->{"ipfilter-$netid"}) {
3982 $implicit_sets->{"ipfilter-$netid"} = [];
3985 my $macaddr = $net->{macaddr
};
3986 my $linklocal = mac_to_linklocal
($macaddr);
3987 $device_ips->{$netid} = [
3988 { cidr
=> $linklocal },
3989 { cidr
=> 'fe80::/10', nomatch
=> 1 }
3993 generate_ipset_chains
($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3994 generate_ipset_chains
($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3996 warn $@ if $@; # just to be sure - should not happen
3999 # generate firewall rules for LXC containers
4000 foreach my $vmid (keys %{$vmdata->{lxc
}}) {
4002 my $conf = $vmdata->{lxc
}->{$vmid};
4003 my $vmfw_conf = $vmfw_configs->{$vmid};
4004 return if !$vmfw_conf;
4006 # When the 'ipfilter' option is enabled every device for which there
4007 # is no 'ipfilter-netX' ipset defined gets an implicit empty default
4009 # The reason is that ipfilter ipsets are always filled with standard
4010 # IPv6 link-local filters, as well as the IP addresses configured
4011 # for the container.
4012 my $ipsets = $vmfw_conf->{ipset
};
4013 my $implicit_sets = {};
4015 my $device_ips = {};
4016 foreach my $netid (keys %$conf) {
4017 next if $netid !~ m/^net(\d+)$/;
4018 my $net = PVE
::LXC
::Config-
>parse_lxc_network($conf->{$netid});
4019 next if !$net->{firewall
};
4021 if ($vmfw_conf->{options
}->{ipfilter
} && !$ipsets->{"ipfilter-$netid"}) {
4022 $implicit_sets->{"ipfilter-$netid"} = [];
4025 my $macaddr = $net->{hwaddr
};
4026 my $linklocal = mac_to_linklocal
($macaddr);
4027 my $set = $device_ips->{$netid} = [
4028 { cidr
=> $linklocal },
4029 { cidr
=> 'fe80::/10', nomatch
=> 1 }
4031 if (defined($net->{ip
}) && $net->{ip
} =~ m!^($IPV4RE)(?:/\d+)?$!) {
4032 push @$set, { cidr
=> $1 };
4034 if (defined($net->{ip6
}) && $net->{ip6
} =~ m!^($IPV6RE)(?:/\d+)?$!) {
4035 push @$set, { cidr
=> $1 };
4039 generate_ipset_chains
($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
4040 generate_ipset_chains
($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
4042 warn $@ if $@; # just to be sure - should not happen
4045 generate_ipset_chains
($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset
});
4047 return $ipset_ruleset;
4050 sub compile_ebtables_filter
{
4051 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata) = @_;
4053 if (!($cluster_conf->{options
}->{ebtables
} // 1)) {
4059 ruleset_create_chain
($ruleset, "PVEFW-FORWARD");
4061 ruleset_create_chain
($ruleset, "PVEFW-FWBR-OUT");
4062 #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED', to speedup rules
4063 ruleset_addrule
($ruleset, 'PVEFW-FORWARD', '-p IPv4', '-j ACCEPT');
4064 ruleset_addrule
($ruleset, 'PVEFW-FORWARD', '-p IPv6', '-j ACCEPT');
4065 ruleset_addrule
($ruleset, 'PVEFW-FORWARD', '-o fwln+', '-j PVEFW-FWBR-OUT');
4067 # generate firewall rules for QEMU VMs
4068 foreach my $vmid (sort keys %{$vmdata->{qemu
}}) {
4070 my $conf = $vmdata->{qemu
}->{$vmid};
4071 my $vmfw_conf = $vmfw_configs->{$vmid};
4072 return if !$vmfw_conf || !$vmfw_conf->{options
}->{enable
};
4073 my $ipsets = $vmfw_conf->{ipset
};
4075 foreach my $netid (sort keys %$conf) {
4076 next if $netid !~ m/^net(\d+)$/;
4077 my $net = PVE
::QemuServer
::parse_net
($conf->{$netid});
4078 next if !$net->{firewall
};
4079 my $iface = "tap${vmid}i$1";
4080 my $macaddr = $net->{macaddr
};
4082 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
4083 foreach my $ipaddr (@$ipset) {
4084 my($ip, $version) = parse_ip_or_cidr
($ipaddr->{cidr
});
4085 next if !$ip || ($version && $version != 4);
4086 push(@$arpfilter, $ip);
4089 generate_tap_layer2filter
($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
4092 warn $@ if $@; # just to be sure - should not happen
4095 # generate firewall rules for LXC containers
4096 foreach my $vmid (sort keys %{$vmdata->{lxc
}}) {
4098 my $conf = $vmdata->{lxc
}->{$vmid};
4100 my $vmfw_conf = $vmfw_configs->{$vmid};
4101 return if !$vmfw_conf || !$vmfw_conf->{options
}->{enable
};
4102 my $ipsets = $vmfw_conf->{ipset
};
4104 foreach my $netid (sort keys %$conf) {
4105 next if $netid !~ m/^net(\d+)$/;
4106 my $net = PVE
::LXC
::Config-
>parse_lxc_network($conf->{$netid});
4107 next if !$net->{firewall
};
4108 my $iface = "veth${vmid}i$1";
4109 my $macaddr = $net->{hwaddr
};
4111 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
4112 foreach my $ipaddr (@$ipset) {
4113 my($ip, $version) = parse_ip_or_cidr
($ipaddr->{cidr
});
4114 next if !$ip || ($version && $version != 4);
4115 push(@$arpfilter, $ip);
4118 if (defined(my $ip = $net->{ip
}) && $vmfw_conf->{options
}->{ipfilter
}) {
4119 # ebtables changes this to a .0/MASK network but we just
4120 # want the address here, no network - see #2193
4122 if ($ip ne 'dhcp') {
4123 push @$arpfilter, $ip;
4126 generate_tap_layer2filter
($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
4129 warn $@ if $@; # just to be sure - should not happen
4135 sub generate_tap_layer2filter
{
4136 my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter) = @_;
4137 my $options = $vmfw_conf->{options
};
4139 my $tapchain = $iface."-OUT";
4141 # ebtables remove zeros from mac pairs
4142 $macaddr =~ s/0([0-9a-f])/$1/ig;
4143 $macaddr = lc($macaddr);
4145 ruleset_create_chain
($ruleset, $tapchain);
4147 if (defined($macaddr) && !(defined($options->{macfilter
}) && $options->{macfilter
} == 0)) {
4148 ruleset_addrule
($ruleset, $tapchain, "-s ! $macaddr", '-j DROP');
4152 my $arpchain = $tapchain."-ARP";
4153 ruleset_addrule
($ruleset, $tapchain, "-p ARP", "-j $arpchain");
4154 ruleset_create_chain
($ruleset, $arpchain);
4156 foreach my $ip (@{$arpfilter}) {
4157 ruleset_addrule
($ruleset, $arpchain, "-p ARP --arp-ip-src $ip", '-j RETURN');
4159 ruleset_addrule
($ruleset, $arpchain, '', '-j DROP');
4162 if (defined($options->{layer2_protocols
})){
4163 my $protochain = $tapchain."-PROTO";
4164 ruleset_addrule
($ruleset, $tapchain, '', "-j $protochain");
4165 ruleset_create_chain
($ruleset, $protochain);
4167 foreach my $proto (split(/,/, $options->{layer2_protocols
})) {
4168 ruleset_addrule
($ruleset, $protochain, "-p $proto", '-j RETURN');
4170 ruleset_addrule
($ruleset, $protochain, '', '-j DROP');
4173 ruleset_addrule
($ruleset, $tapchain, '', '-j ACCEPT');
4175 ruleset_addrule
($ruleset, 'PVEFW-FWBR-OUT', "-i $iface", "-j $tapchain");
4178 # the parameter $change_only_regex changes two things if defined:
4179 # * all chains not matching it will be left intact
4180 # * both the $active_chains hash and the returned status_hash have different
4181 # structure (they contain a key named 'rules').
4182 sub get_ruleset_status
{
4183 my ($ruleset, $active_chains, $digest_fn, $change_only_regex) = @_;
4185 my $statushash = {};
4187 foreach my $chain (sort keys %$ruleset) {
4188 my $rules = $ruleset->{$chain};
4189 my $sig = &$digest_fn($rules);
4192 $statushash->{$chain}->{sig
} = $sig;
4193 if (defined($change_only_regex)) {
4194 $oldsig = $active_chains->{$chain}->{sig
};
4195 $statushash->{$chain}->{rules
} = $rules;
4197 $oldsig = $active_chains->{$chain};
4199 if (!defined($oldsig)) {
4200 $statushash->{$chain}->{action
} = 'create';
4202 if ($oldsig eq $sig) {
4203 $statushash->{$chain}->{action
} = 'exists';
4205 $statushash->{$chain}->{action
} = 'update';
4209 print "$statushash->{$chain}->{action} $chain ($sig)\n";
4210 foreach my $cmd (@{$rules}) {
4216 foreach my $chain (sort keys %$active_chains) {
4217 next if defined($ruleset->{$chain});
4218 my $action = 'delete';
4219 my $sig = $active_chains->{$chain};
4220 if (defined($change_only_regex)) {
4221 $action = 'ignore' if ($chain !~ m/$change_only_regex/);
4222 $statushash->{$chain}->{rules
} = $active_chains->{$chain}->{rules
};
4223 $statushash->{$chain}->{policy
} = $active_chains->{$chain}->{policy
};
4226 $statushash->{$chain}->{action
} = $action;
4227 $statushash->{$chain}->{sig
} = $sig;
4228 print "$action $chain ($sig)\n" if $verbose;
4234 sub print_sig_rule
{
4235 my ($chain, $sig) = @_;
4237 # We just use this to store a SHA1 checksum used to detect changes
4238 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
4241 sub get_ruleset_cmdlist {
4242 my ($ruleset, $iptablescmd, $table) = @_;
4244 $table = 'filter' if !$table;
4246 my $cmdlist = "*$table\n"; # we pass this to iptables-restore;
4248 my ($active_chains, $hooks) = iptables_get_chains($iptablescmd, $table);
4249 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
4251 # create missing chains first
4252 foreach my $chain (sort keys %$ruleset) {
4253 my $stat = $statushash->{$chain};
4254 die "internal error
" if !$stat;
4255 next if $stat->{action} ne 'create';
4257 $cmdlist .= ":$chain - [0:0]\n";
4260 foreach my $h (qw(INPUT OUTPUT FORWARD PREROUTING)) {
4261 my $chain = "PVEFW-$h";
4262 if ($ruleset->{$chain} && !$hooks->{$h}) {
4263 $cmdlist .= "-A $h -j $chain\n";
4267 foreach my $chain (sort keys %$ruleset) {
4268 my $stat = $statushash->{$chain};
4269 die "internal error" if !$stat;
4271 if ($stat->{action
} eq 'update' || $stat->{action
} eq 'create') {
4272 $cmdlist .= "-F $chain\n";
4273 foreach my $cmd (@{$ruleset->{$chain}}) {
4274 $cmdlist .= "$cmd\n";
4276 $cmdlist .= print_sig_rule
($chain, $stat->{sig
});
4277 } elsif ($stat->{action
} eq 'delete') {
4278 die "internal error"; # this should not happen
4279 } elsif ($stat->{action
} eq 'exists') {
4282 die "internal error - unknown status '$stat->{action}'";
4286 foreach my $chain (keys %$statushash) {
4287 next if $statushash->{$chain}->{action
} ne 'delete';
4288 $cmdlist .= "-F $chain\n";
4290 foreach my $chain (keys %$statushash) {
4291 next if $statushash->{$chain}->{action
} ne 'delete';
4292 next if $chain eq 'PVEFW-INPUT';
4293 next if $chain eq 'PVEFW-OUTPUT';
4294 next if $chain eq 'PVEFW-FORWARD';
4295 next if $chain eq 'PVEFW-PREROUTING';
4296 $cmdlist .= "-X $chain\n";
4299 my $changes = $cmdlist ne "*$table\n" ?
1 : 0;
4301 $cmdlist .= "COMMIT\n";
4303 return wantarray ?
($cmdlist, $changes) : $cmdlist;
4306 my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tap|veth)\d+i\d+-(?:IN|OUT)/;
4308 sub get_ebtables_cmdlist
{
4312 my $cmdlist = "*filter\n";
4314 my $active_chains = ebtables_get_chains
();
4315 my $statushash = get_ruleset_status
($ruleset, $active_chains,
4316 \
&iptables_chain_digest
,
4317 $pve_ebtables_chainname_regex);
4319 # create chains first and make sure PVE rules are evaluated if active
4320 my $append_pve_to_forward = '-A FORWARD -j PVEFW-FORWARD';
4321 my $pve_include = 0;
4322 foreach my $chain (sort keys %$statushash) {
4323 next if ($statushash->{$chain}->{action
} eq 'delete');
4324 my $policy = $statushash->{$chain}->{policy
} // 'ACCEPT';
4325 $cmdlist .= ":$chain $policy\n";
4326 $pve_include = 1 if ($chain eq 'PVEFW-FORWARD');
4329 foreach my $chain (sort keys %$statushash) {
4330 my $stat = $statushash->{$chain};
4331 $changes = 1 if ($stat->{action
} !~ 'ignore|exists');
4332 next if ($stat->{action
} eq 'delete');
4334 foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
4335 if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
4336 next if ! $pve_include;
4339 $cmdlist .= "$cmd\n";
4342 $cmdlist .= "$append_pve_to_forward\n" if $pve_include;
4344 return wantarray ?
($cmdlist, $changes) : $cmdlist;
4347 sub get_ipset_cmdlist
{
4352 my $delete_cmdlist = "";
4354 my $active_chains = ipset_get_chains
();
4355 my $statushash = get_ruleset_status
($ruleset, $active_chains, \
&ipset_chain_digest
);
4357 # remove stale _swap chains
4358 foreach my $chain (keys %$active_chains) {
4359 if ($chain =~ m/^PVEFW-\S+_swap$/) {
4360 $cmdlist .= "destroy $chain\n";
4364 foreach my $chain (keys %$ruleset) {
4365 my $stat = $statushash->{$chain};
4366 die "internal error" if !$stat;
4368 if ($stat->{action
} eq 'create') {
4369 foreach my $cmd (@{$ruleset->{$chain}}) {
4370 $cmdlist .= "$cmd\n";
4375 foreach my $chain (keys %$ruleset) {
4376 my $stat = $statushash->{$chain};
4377 die "internal error" if !$stat;
4379 if ($stat->{action
} eq 'update') {
4380 my $chain_swap = $chain."_swap";
4382 foreach my $cmd (@{$ruleset->{$chain}}) {
4383 $cmd =~ s/$chain/$chain_swap/;
4384 $cmdlist .= "$cmd\n";
4386 $cmdlist .= "swap $chain_swap $chain\n";
4387 $cmdlist .= "flush $chain_swap\n";
4388 $cmdlist .= "destroy $chain_swap\n";
4392 # the remove unused chains
4393 foreach my $chain (keys %$statushash) {
4394 next if $statushash->{$chain}->{action
} ne 'delete';
4396 $delete_cmdlist .= "flush $chain\n";
4397 $delete_cmdlist .= "destroy $chain\n";
4400 my $changes = ($cmdlist || $delete_cmdlist) ?
1 : 0;
4402 return ($cmdlist, $delete_cmdlist, $changes);
4406 my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = @_;
4408 enable_bridge_firewall
();
4410 my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
4411 get_ipset_cmdlist
($ipset_ruleset);
4413 my ($cmdlist, $changes) = get_ruleset_cmdlist
($ruleset->{filter
});
4414 my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist
($rulesetv6->{filter
}, "ip6tables");
4415 my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist
($ebtables_ruleset);
4416 my ($cmdlist_raw, $changes_raw) = get_ruleset_cmdlist
($ruleset->{raw
}, undef, 'raw');
4417 my ($cmdlistv6_raw, $changesv6_raw) = get_ruleset_cmdlist
($rulesetv6->{raw
}, "ip6tables", 'raw');
4420 if ($ipset_changes) {
4421 print "ipset changes:\n";
4422 print $ipset_create_cmdlist if $ipset_create_cmdlist;
4423 print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
4427 print "iptables changes:\n";
4432 print "ip6tables changes:\n";
4437 print "iptables table raw changes:\n";
4441 if ($changesv6_raw) {
4442 print "ip6tables table raw changes:\n";
4443 print $cmdlistv6_raw;
4446 if ($ebtables_changes) {
4447 print "ebtables changes:\n";
4448 print $ebtables_cmdlist;
4452 my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
4453 PVE
::Tools
::file_set_contents
($tmpfile, $ipset_create_cmdlist || '');
4455 ipset_restore_cmdlist
($ipset_create_cmdlist);
4457 $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
4458 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlist || '');
4460 iptables_restore_cmdlist
($cmdlist);
4462 $tmpfile = "$pve_fw_status_dir/ip4cmdlistraw";
4463 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlist_raw || '');
4465 iptables_restore_cmdlist
($cmdlist_raw, 'raw');
4467 $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
4468 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlistv6 || '');
4470 ip6tables_restore_cmdlist
($cmdlistv6);
4472 $tmpfile = "$pve_fw_status_dir/ip6cmdlistraw";
4473 PVE
::Tools
::file_set_contents
($tmpfile, $cmdlistv6_raw || '');
4475 ip6tables_restore_cmdlist
($cmdlistv6_raw, 'raw');
4477 $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
4478 PVE
::Tools
::file_set_contents
($tmpfile, $ipset_delete_cmdlist || '');
4480 ipset_restore_cmdlist
($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
4482 ebtables_restore_cmdlist
($ebtables_cmdlist);
4484 $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
4485 PVE
::Tools
::file_set_contents
($tmpfile, $ebtables_cmdlist || '');
4487 # test: re-read status and check if everything is up to date
4488 my $ruleset_filter = $ruleset->{filter
};
4489 my $active_chains = iptables_get_chains
();
4490 my $statushash = get_ruleset_status
($ruleset_filter, $active_chains, \
&iptables_chain_digest
);
4493 foreach my $chain (sort keys %$ruleset_filter) {
4494 my $stat = $statushash->{$chain};
4495 if ($stat->{action
} ne 'exists') {
4496 warn "unable to update chain '$chain'\n";
4501 my $rulesetv6_filter = $rulesetv6->{filter
};
4502 my $active_chainsv6 = iptables_get_chains
("ip6tables");
4503 my $statushashv6 = get_ruleset_status
($rulesetv6_filter, $active_chainsv6, \
&iptables_chain_digest
);
4505 foreach my $chain (sort keys %$rulesetv6_filter) {
4506 my $stat = $statushashv6->{$chain};
4507 if ($stat->{action
} ne 'exists') {
4508 warn "unable to update chain '$chain'\n";
4513 my $ruleset_raw = $ruleset->{raw
};
4514 my $active_chains_raw = iptables_get_chains
(undef, 'raw');
4515 my $statushash_raw = get_ruleset_status
($ruleset_raw, $active_chains_raw, \
&iptables_chain_digest
);
4517 foreach my $chain (sort keys %$ruleset_raw) {
4518 my $stat = $statushash_raw->{$chain};
4519 if ($stat->{action
} ne 'exists') {
4520 warn "unable to update chain '$chain'\n";
4525 my $rulesetv6_raw = $rulesetv6->{raw
};
4526 my $active_chainsv6_raw = iptables_get_chains
("ip6tables", 'raw');
4527 my $statushashv6_raw = get_ruleset_status
($rulesetv6_raw, $active_chainsv6_raw, \
&iptables_chain_digest
);
4529 foreach my $chain (sort keys %$rulesetv6_raw) {
4530 my $stat = $statushashv6_raw->{$chain};
4531 if ($stat->{action
} ne 'exists') {
4532 warn "unable to update chain '$chain'\n";
4537 my $active_ebtables_chains = ebtables_get_chains
();
4538 my $ebtables_statushash = get_ruleset_status
($ebtables_ruleset,
4539 $active_ebtables_chains, \
&iptables_chain_digest
,
4540 $pve_ebtables_chainname_regex);
4542 foreach my $chain (sort keys %$ebtables_ruleset) {
4543 my $stat = $ebtables_statushash->{$chain};
4544 if ($stat->{action
} ne 'exists') {
4545 warn "ebtables : unable to update chain '$chain'\n";
4550 die "unable to apply firewall changes\n" if $errors;
4552 update_nf_conntrack_max
($hostfw_conf);
4554 update_nf_conntrack_tcp_timeout_established
($hostfw_conf);
4556 update_nf_conntrack_tcp_timeout_syn_recv
($hostfw_conf);
4558 update_nf_conntrack_logging
($hostfw_conf);
4561 sub update_nf_conntrack_max
{
4562 my ($hostfw_conf) = @_;
4564 my $max = 262144; # reasonable default (2^16 * 4), see nf_conntrack-sysctl docs
4566 my $options = $hostfw_conf->{options
} || {};
4568 if (defined($options->{nf_conntrack_max
}) && ($options->{nf_conntrack_max
} > $max)) {
4569 $max = $options->{nf_conntrack_max
};
4570 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
4573 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
4574 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
4576 my $current = int(PVE
::Tools
::file_read_firstline
($filename_nf_conntrack_max) || $max);
4578 if ($current != $max) {
4579 my $hashsize = int($max/4);
4580 PVE
::ProcFSTools
::write_proc_entry
($filename_hashsize, $hashsize);
4581 PVE
::ProcFSTools
::write_proc_entry
($filename_nf_conntrack_max, $max);
4585 sub update_nf_conntrack_tcp_timeout_established
{
4586 my ($hostfw_conf) = @_;
4588 my $options = $hostfw_conf->{options
} || {};
4590 my $value = defined($options->{nf_conntrack_tcp_timeout_established
}) ?
$options->{nf_conntrack_tcp_timeout_established
} : 432000;
4592 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
4595 sub update_nf_conntrack_tcp_timeout_syn_recv
{
4596 my ($hostfw_conf) = @_;
4598 my $options = $hostfw_conf->{options
} || {};
4600 my $value = defined($options->{nf_conntrack_tcp_timeout_syn_recv
}) ?
$options->{nf_conntrack_tcp_timeout_syn_recev
} : 60;
4602 PVE
::ProcFSTools
::write_proc_entry
("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_syn_recv", $value);
4605 my $log_nf_conntrack_enabled = undef;
4606 sub update_nf_conntrack_logging
{
4607 my ($hostfw_conf) = @_;
4609 my $options = $hostfw_conf->{options
} || {};
4610 my $value = $options->{log_nf_conntrack
} || 0;
4611 if (!defined($log_nf_conntrack_enabled)
4612 || $value != $log_nf_conntrack_enabled)
4614 my $tmpfile = "$pve_fw_status_dir/log_nf_conntrack";
4615 PVE
::Tools
::file_set_contents
($tmpfile, $value);
4617 run_command
([qw(systemctl try-reload-or-restart pvefw-logger.service)]);
4618 $log_nf_conntrack_enabled = $value;
4622 sub remove_pvefw_chains
{
4624 PVE
::Firewall
::remove_pvefw_chains_iptables
("iptables");
4625 PVE
::Firewall
::remove_pvefw_chains_iptables
("ip6tables");
4626 PVE
::Firewall
::remove_pvefw_chains_iptables
("iptables", "raw");
4627 PVE
::Firewall
::remove_pvefw_chains_iptables
("ip6tables", "raw");
4628 PVE
::Firewall
::remove_pvefw_chains_ipset
();
4629 PVE
::Firewall
::remove_pvefw_chains_ebtables
();
4633 sub remove_pvefw_chains_iptables
{
4634 my ($iptablescmd, $table) = @_;
4636 $table = 'filter' if !$table;
4638 my ($chash, $hooks) = iptables_get_chains
($iptablescmd, $table);
4639 my $cmdlist = "*$table\n";
4641 foreach my $h (qw(INPUT OUTPUT FORWARD PREROUTING)) {
4643 $cmdlist .= "-D $h -j PVEFW-$h\n";
4647 foreach my $chain (keys %$chash) {
4648 $cmdlist .= "-F $chain\n";
4651 foreach my $chain (keys %$chash) {
4652 $cmdlist .= "-X $chain\n";
4654 $cmdlist .= "COMMIT\n";
4656 if($iptablescmd eq "ip6tables") {
4657 ip6tables_restore_cmdlist
($cmdlist, $table);
4659 iptables_restore_cmdlist
($cmdlist, $table);
4663 sub remove_pvefw_chains_ipset
{
4665 my $ipset_chains = ipset_get_chains
();
4669 foreach my $chain (keys %$ipset_chains) {
4670 $cmdlist .= "flush $chain\n";
4671 $cmdlist .= "destroy $chain\n";
4674 ipset_restore_cmdlist
($cmdlist) if $cmdlist;
4677 sub remove_pvefw_chains_ebtables
{
4678 # apply empty ruleset = remove all our chains
4679 ebtables_restore_cmdlist
(get_ebtables_cmdlist
({}));
4683 my ($cluster_conf, $host_conf) = @_;
4685 if (!-x
"/usr/libexec/proxmox/proxmox-firewall") {
4689 $cluster_conf = load_clusterfw_conf
() if !defined($cluster_conf);
4690 $host_conf = load_hostfw_conf
($cluster_conf) if !defined($host_conf);
4692 return $host_conf->{options
}->{nftables
};
4695 my sub update_force_nftables_disable_flag
{
4696 my ($cluster_firewall_enabled, $is_nftables) = @_;
4698 # This is checked in proxmox-firewall to avoid log-spam due to failing to parse the config
4699 my $FORCE_NFT_DISABLE_FLAG_FILE = "/run/proxmox-nftables-firewall-force-disable";
4701 if (!($cluster_firewall_enabled && $is_nftables)) {
4702 if (! -e
$FORCE_NFT_DISABLE_FLAG_FILE) {
4703 open(my $_fh, '>', $FORCE_NFT_DISABLE_FLAG_FILE)
4704 or warn "failed to create flag file '$FORCE_NFT_DISABLE_FLAG_FILE' – $!\n";
4707 unlink($FORCE_NFT_DISABLE_FLAG_FILE)
4708 or $!{ENOENT
} or warn "failed to unlink flag file '$FORCE_NFT_DISABLE_FLAG_FILE' - $!\n";
4712 sub is_enabled_and_not_nftables
{
4713 my ($cluster_conf, $host_conf) = @_;
4715 $cluster_conf = load_clusterfw_conf
() if !defined($cluster_conf);
4716 $host_conf = load_hostfw_conf
($cluster_conf) if !defined($host_conf);
4718 my $is_nftables = is_nftables
($cluster_conf, $host_conf);
4720 update_force_nftables_disable_flag
($cluster_conf->{options
}->{enable
}, $is_nftables);
4722 return $cluster_conf->{options
}->{enable
} && !$is_nftables;
4726 return if !is_enabled_and_not_nftables
();
4728 # load required modules here
4734 my $cluster_conf = load_clusterfw_conf
();
4735 my $hostfw_conf = load_hostfw_conf
($cluster_conf);
4737 if (!is_enabled_and_not_nftables
($cluster_conf, $hostfw_conf)) {
4738 PVE
::Firewall
::remove_pvefw_chains
();
4742 my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile
($cluster_conf, $hostfw_conf);
4744 apply_ruleset
($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);