-package PVE::Firewall;
-
-use warnings;
-use strict;
-use Data::Dumper;
-use Digest::SHA;
-use PVE::Tools;
-use PVE::QemuServer;
-use File::Basename;
-use File::Path;
-use IO::File;
-use Net::IP;
-use PVE::Tools qw(run_command lock_file);
-
-use Data::Dumper;
-
-my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
-my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
-
-my $default_log_level = 'info';
-
-my $log_level_hash = {
- debug => 7,
- info => 6,
- notice => 5,
- warning => 4,
- err => 3,
- crit => 2,
- alert => 1,
- emerg => 0,
-};
-
-# imported/converted from: /usr/share/shorewall/macro.*
-my $pve_fw_macros = {
- 'Amanda' => [
- { action => 'PARAM', proto => 'udp', dport => '10080' },
- { action => 'PARAM', proto => 'tcp', dport => '10080' },
- ],
- 'Auth' => [
- { action => 'PARAM', proto => 'tcp', dport => '113' },
- ],
- 'BGP' => [
- { action => 'PARAM', proto => 'tcp', dport => '179' },
- ],
- 'BitTorrent' => [
- { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
- { action => 'PARAM', proto => 'udp', dport => '6881' },
- ],
- 'BitTorrent32' => [
- { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
- { action => 'PARAM', proto => 'udp', dport => '6881' },
- ],
- 'CVS' => [
- { action => 'PARAM', proto => 'tcp', dport => '2401' },
- ],
- 'Citrix' => [
- { action => 'PARAM', proto => 'tcp', dport => '1494' },
- { action => 'PARAM', proto => 'udp', dport => '1604' },
- { action => 'PARAM', proto => 'tcp', dport => '2598' },
- ],
- 'DAAP' => [
- { action => 'PARAM', proto => 'tcp', dport => '3689' },
- { action => 'PARAM', proto => 'udp', dport => '3689' },
- ],
- 'DCC' => [
- { action => 'PARAM', proto => 'tcp', dport => '6277' },
- ],
- 'DHCPfwd' => [
- { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' },
- ],
- 'DNS' => [
- { action => 'PARAM', proto => 'udp', dport => '53' },
- { action => 'PARAM', proto => 'tcp', dport => '53' },
- ],
- 'Distcc' => [
- { action => 'PARAM', proto => 'tcp', dport => '3632' },
- ],
- 'Edonkey' => [
- { action => 'PARAM', proto => 'tcp', dport => '4662' },
- { action => 'PARAM', proto => 'udp', dport => '4665' },
- ],
- 'FTP' => [
- { action => 'PARAM', proto => 'tcp', dport => '21' },
- ],
- 'Finger' => [
- { action => 'PARAM', proto => 'tcp', dport => '79' },
- ],
- 'GNUnet' => [
- { action => 'PARAM', proto => 'tcp', dport => '2086' },
- { action => 'PARAM', proto => 'udp', dport => '2086' },
- { action => 'PARAM', proto => 'tcp', dport => '1080' },
- { action => 'PARAM', proto => 'udp', dport => '1080' },
- ],
- 'GRE' => [
- { action => 'PARAM', proto => '47' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
- ],
- 'Git' => [
- { action => 'PARAM', proto => 'tcp', dport => '9418' },
- ],
- 'Gnutella' => [
- { action => 'PARAM', proto => 'tcp', dport => '6346' },
- { action => 'PARAM', proto => 'udp', dport => '6346' },
- ],
- 'HKP' => [
- { action => 'PARAM', proto => 'tcp', dport => '11371' },
- ],
- 'HTTP' => [
- { action => 'PARAM', proto => 'tcp', dport => '80' },
- ],
- 'HTTPS' => [
- { action => 'PARAM', proto => 'tcp', dport => '443' },
- ],
- 'ICPV2' => [
- { action => 'PARAM', proto => 'udp', dport => '3130' },
- ],
- 'ICQ' => [
- { action => 'PARAM', proto => 'tcp', dport => '5190' },
- ],
- 'IMAP' => [
- { action => 'PARAM', proto => 'tcp', dport => '143' },
- ],
- 'IMAPS' => [
- { action => 'PARAM', proto => 'tcp', dport => '993' },
- ],
- 'IPIP' => [
- { action => 'PARAM', proto => '94' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' },
- ],
- 'IPP' => [
- { action => 'PARAM', proto => 'tcp', dport => '631' },
- ],
- 'IPPbrd' => [
- { action => 'PARAM', proto => 'udp', dport => '631' },
- ],
- 'IPPserver' => [
- { action => 'PARAM', source => 'SOURCE', dest => 'DEST', proto => 'tcp', dport => '631' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '631' },
- ],
- 'IPsec' => [
- { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
- { action => 'PARAM', proto => '50' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
- ],
- 'IPsecah' => [
- { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
- { action => 'PARAM', proto => '51' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' },
- ],
- 'IPsecnat' => [
- { action => 'PARAM', proto => 'udp', dport => '500' },
- { action => 'PARAM', proto => 'udp', dport => '4500' },
- { action => 'PARAM', proto => '50' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
- ],
- 'IRC' => [
- { action => 'PARAM', proto => 'tcp', dport => '6667' },
- ],
- 'JabberPlain' => [
- { action => 'PARAM', proto => 'tcp', dport => '5222' },
- ],
- 'JabberSecure' => [
- { action => 'PARAM', proto => 'tcp', dport => '5223' },
- ],
- 'Jabberd' => [
- { action => 'PARAM', proto => 'tcp', dport => '5269' },
- ],
- 'Jetdirect' => [
- { action => 'PARAM', proto => 'tcp', dport => '9100' },
- ],
- 'L2TP' => [
- { action => 'PARAM', proto => 'udp', dport => '1701' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' },
- ],
- 'LDAP' => [
- { action => 'PARAM', proto => 'tcp', dport => '389' },
- ],
- 'LDAPS' => [
- { action => 'PARAM', proto => 'tcp', dport => '636' },
- ],
- 'MSNP' => [
- { action => 'PARAM', proto => 'tcp', dport => '1863' },
- ],
- 'MSSQL' => [
- { action => 'PARAM', proto => 'tcp', dport => '1433' },
- ],
- 'Mail' => [
- { action => 'PARAM', proto => 'tcp', dport => '25' },
- { action => 'PARAM', proto => 'tcp', dport => '465' },
- { action => 'PARAM', proto => 'tcp', dport => '587' },
- ],
- 'Munin' => [
- { action => 'PARAM', proto => 'tcp', dport => '4949' },
- ],
- 'MySQL' => [
- { action => 'PARAM', proto => 'tcp', dport => '3306' },
- ],
- 'NNTP' => [
- { action => 'PARAM', proto => 'tcp', dport => '119' },
- ],
- 'NNTPS' => [
- { action => 'PARAM', proto => 'tcp', dport => '563' },
- ],
- 'NTP' => [
- { action => 'PARAM', proto => 'udp', dport => '123' },
- ],
- 'NTPbi' => [
- { action => 'PARAM', proto => 'udp', dport => '123' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' },
- ],
- 'NTPbrd' => [
- { action => 'PARAM', proto => 'udp', dport => '123' },
- { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '123' },
- ],
- 'OSPF' => [
- { action => 'PARAM', proto => '89' },
- ],
- 'OpenVPN' => [
- { action => 'PARAM', proto => 'udp', dport => '1194' },
- ],
- 'PCA' => [
- { action => 'PARAM', proto => 'udp', dport => '5632' },
- { action => 'PARAM', proto => 'tcp', dport => '5631' },
- ],
- 'POP3' => [
- { action => 'PARAM', proto => 'tcp', dport => '110' },
- ],
- 'POP3S' => [
- { action => 'PARAM', proto => 'tcp', dport => '995' },
- ],
- 'PPtP' => [
- { action => 'PARAM', proto => '47' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
- { action => 'PARAM', proto => 'tcp', dport => '1723' },
- ],
- 'Ping' => [
- { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
- ],
- 'PostgreSQL' => [
- { action => 'PARAM', proto => 'tcp', dport => '5432' },
- ],
- 'Printer' => [
- { action => 'PARAM', proto => 'tcp', dport => '515' },
- ],
- 'RDP' => [
- { action => 'PARAM', proto => 'tcp', dport => '3389' },
- ],
- 'RIPbi' => [
- { action => 'PARAM', proto => 'udp', dport => '520' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' },
- ],
- 'RNDC' => [
- { action => 'PARAM', proto => 'tcp', dport => '953' },
- ],
- 'Razor' => [
- { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
- ],
- 'Rdate' => [
- { action => 'PARAM', proto => 'tcp', dport => '37' },
- ],
- 'Rsync' => [
- { action => 'PARAM', proto => 'tcp', dport => '873' },
- ],
- 'SANE' => [
- { action => 'PARAM', proto => 'tcp', dport => '6566' },
- ],
- 'SMB' => [
- { action => 'PARAM', proto => 'udp', dport => '135,445' },
- { action => 'PARAM', proto => 'udp', dport => '137:139' },
- { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
- { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
- ],
- 'SMBBI' => [
- { action => 'PARAM', proto => 'udp', dport => '135,445' },
- { action => 'PARAM', proto => 'udp', dport => '137:139' },
- { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
- { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' },
- ],
- 'SMBswat' => [
- { action => 'PARAM', proto => 'tcp', dport => '901' },
- ],
- 'SMTP' => [
- { action => 'PARAM', proto => 'tcp', dport => '25' },
- ],
- 'SMTPS' => [
- { action => 'PARAM', proto => 'tcp', dport => '465' },
- ],
- 'SNMP' => [
- { action => 'PARAM', proto => 'udp', dport => '161:162' },
- { action => 'PARAM', proto => 'tcp', dport => '161' },
- ],
- 'SPAMD' => [
- { action => 'PARAM', proto => 'tcp', dport => '783' },
- ],
- 'SSH' => [
- { action => 'PARAM', proto => 'tcp', dport => '22' },
- ],
- 'SVN' => [
- { action => 'PARAM', proto => 'tcp', dport => '3690' },
- ],
- 'SixXS' => [
- { action => 'PARAM', proto => 'tcp', dport => '3874' },
- { action => 'PARAM', proto => 'udp', dport => '3740' },
- { action => 'PARAM', proto => '41' },
- { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
- ],
- 'Squid' => [
- { action => 'PARAM', proto => 'tcp', dport => '3128' },
- ],
- 'Submission' => [
- { action => 'PARAM', proto => 'tcp', dport => '587' },
- ],
- 'Syslog' => [
- { action => 'PARAM', proto => 'udp', dport => '514' },
- { action => 'PARAM', proto => 'tcp', dport => '514' },
- ],
- 'TFTP' => [
- { action => 'PARAM', proto => 'udp', dport => '69' },
- ],
- 'Telnet' => [
- { action => 'PARAM', proto => 'tcp', dport => '23' },
- ],
- 'Telnets' => [
- { action => 'PARAM', proto => 'tcp', dport => '992' },
- ],
- 'Time' => [
- { action => 'PARAM', proto => 'tcp', dport => '37' },
- ],
- 'Trcrt' => [
- { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
- { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
- ],
- 'VNC' => [
- { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
- ],
- 'VNCL' => [
- { action => 'PARAM', proto => 'tcp', dport => '5500' },
- ],
- 'Web' => [
- { action => 'PARAM', proto => 'tcp', dport => '80' },
- { action => 'PARAM', proto => 'tcp', dport => '443' },
- ],
- 'Webcache' => [
- { action => 'PARAM', proto => 'tcp', dport => '8080' },
- ],
- 'Webmin' => [
- { action => 'PARAM', proto => 'tcp', dport => '10000' },
- ],
- 'Whois' => [
- { action => 'PARAM', proto => 'tcp', dport => '43' },
- ],
-};
-
-my $pve_fw_parsed_macros;
-my $pve_fw_preferred_macro_names = {};
-
-my $pve_std_chains = {
- 'PVEFW-SET-ACCEPT-MARK' => [
- "-j MARK --set-mark 1",
- ],
- 'PVEFW-DropBroadcast' => [
- # same as shorewall 'Broadcast'
- # simply DROP BROADCAST/MULTICAST/ANYCAST
- # we can use this to reduce logging
- { action => 'DROP', dsttype => 'BROADCAST' },
- { action => 'DROP', dsttype => 'MULTICAST' },
- { action => 'DROP', dsttype => 'ANYCAST' },
- { action => 'DROP', dest => '224.0.0.0/4' },
- ],
- 'PVEFW-reject' => [
- # same as shorewall 'reject'
- { action => 'DROP', dsttype => 'BROADCAST' },
- { action => 'DROP', source => '224.0.0.0/4' },
- { action => 'DROP', proto => 'icmp' },
- "-p tcp -j REJECT --reject-with tcp-reset",
- "-p udp -j REJECT --reject-with icmp-port-unreachable",
- "-p icmp -j REJECT --reject-with icmp-host-unreachable",
- "-j REJECT --reject-with icmp-host-prohibited",
- ],
- 'PVEFW-Drop' => [
- # same as shorewall 'Drop', which is equal to DROP,
- # but REJECT/DROP some packages to reduce logging,
- # and ACCEPT critical ICMP types
- { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
- # we are not interested in BROADCAST/MULTICAST/ANYCAST
- { action => 'PVEFW-DropBroadcast' },
- # ACCEPT critical ICMP types
- { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
- { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
- # Drop packets with INVALID state
- "-m conntrack --ctstate INVALID -j DROP",
- # Drop Microsoft SMB noise
- { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
- { action => 'DROP', proto => 'udp', dport => '137:139'},
- { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
- { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
- { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
- # Drop new/NotSyn traffic so that it doesn't get logged
- "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
- # Drop DNS replies
- { action => 'DROP', proto => 'udp', sport => 53 },
- ],
- 'PVEFW-Reject' => [
- # same as shorewall 'Reject', which is equal to Reject,
- # but REJECT/DROP some packages to reduce logging,
- # and ACCEPT critical ICMP types
- { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
- # we are not interested in BROADCAST/MULTICAST/ANYCAST
- { action => 'PVEFW-DropBroadcast' },
- # ACCEPT critical ICMP types
- { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
- { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
- # Drop packets with INVALID state
- "-m conntrack --ctstate INVALID -j DROP",
- # Drop Microsoft SMB noise
- { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
- { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
- { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
- { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
- { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
- # Drop new/NotSyn traffic so that it doesn't get logged
- "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
- # Drop DNS replies
- { action => 'DROP', proto => 'udp', sport => 53 },
- ],
- 'PVEFW-tcpflags' => [
- # same as shorewall tcpflags action.
- # Packets arriving on this interface are checked for som illegal combinations of TCP flags
- "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
- "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
- "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
- "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
- "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
- ],
- 'PVEFW-smurfs' => [
- # same as shorewall smurfs action
- # Filter packets for smurfs (packets with a broadcast address as the source).
- "-s 0.0.0.0/32 -j RETURN",
- "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
- "-s 224.0.0.0/4 -g PVEFW-smurflog",
- ],
-};
-
-# iptables -p icmp -h
-my $icmp_type_names = {
- any => 1,
- 'echo-reply' => 1,
- 'destination-unreachable' => 1,
- 'network-unreachable' => 1,
- 'host-unreachable' => 1,
- 'protocol-unreachable' => 1,
- 'port-unreachable' => 1,
- 'fragmentation-needed' => 1,
- 'source-route-failed' => 1,
- 'network-unknown' => 1,
- 'host-unknown' => 1,
- 'network-prohibited' => 1,
- 'host-prohibited' => 1,
- 'TOS-network-unreachable' => 1,
- 'TOS-host-unreachable' => 1,
- 'communication-prohibited' => 1,
- 'host-precedence-violation' => 1,
- 'precedence-cutoff' => 1,
- 'source-quench' => 1,
- 'redirect' => 1,
- 'network-redirect' => 1,
- 'host-redirect' => 1,
- 'TOS-network-redirect' => 1,
- 'TOS-host-redirect' => 1,
- 'echo-request' => 1,
- 'router-advertisement' => 1,
- 'router-solicitation' => 1,
- 'time-exceeded' => 1,
- 'ttl-zero-during-transit' => 1,
- 'ttl-zero-during-reassembly' => 1,
- 'parameter-problem' => 1,
- 'ip-header-bad' => 1,
- 'required-option-missing' => 1,
- 'timestamp-request' => 1,
- 'timestamp-reply' => 1,
- 'address-mask-request' => 1,
- 'address-mask-reply' => 1,
-};
-
-sub get_firewall_macros {
-
- return $pve_fw_parsed_macros if $pve_fw_parsed_macros;
-
- $pve_fw_parsed_macros = {};
-
- foreach my $k (keys %$pve_fw_macros) {
- my $name = lc($k);
-
- my $macro = $pve_fw_macros->{$k};
- $pve_fw_preferred_macro_names->{$name} = $k;
- $pve_fw_parsed_macros->{$name} = $macro;
- }
-
- return $pve_fw_parsed_macros;
-}
-
-my $etc_services;
-
-sub get_etc_services {
-
- return $etc_services if $etc_services;
-
- my $filename = "/etc/services";
-
- my $fh = IO::File->new($filename, O_RDONLY);
- if (!$fh) {
- warn "unable to read '$filename' - $!\n";
- return {};
- }
-
- my $services = {};
-
- while (my $line = <$fh>) {
- chomp ($line);
- next if $line =~m/^#/;
- next if ($line =~m/^\s*$/);
-
- if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
- $services->{byid}->{$2}->{name} = $1;
- $services->{byid}->{$2}->{port} = $2;
- $services->{byid}->{$2}->{$3} = 1;
- $services->{byname}->{$1} = $services->{byid}->{$2};
- }
- }
-
- close($fh);
-
- $etc_services = $services;
-
-
- return $etc_services;
-}
-
-my $etc_protocols;
-
-sub get_etc_protocols {
- return $etc_protocols if $etc_protocols;
-
- my $filename = "/etc/protocols";
-
- my $fh = IO::File->new($filename, O_RDONLY);
- if (!$fh) {
- warn "unable to read '$filename' - $!\n";
- return {};
- }
-
- my $protocols = {};
-
- while (my $line = <$fh>) {
- chomp ($line);
- next if $line =~m/^#/;
- next if ($line =~m/^\s*$/);
-
- if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
- $protocols->{byid}->{$2}->{name} = $1;
- $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
- }
- }
-
- close($fh);
-
- $etc_protocols = $protocols;
-
- return $etc_protocols;
-}
-
-sub parse_address_list {
- my ($str) = @_;
-
- my $nbaor = 0;
- foreach my $aor (split(/,/, $str)) {
- if (!Net::IP->new($aor)) {
- my $err = Net::IP::Error();
- die "invalid IP address: $err\n";
- }else{
- $nbaor++;
- }
- }
- return $nbaor;
-}
-
-sub parse_port_name_number_or_range {
- my ($str) = @_;
-
- my $services = PVE::Firewall::get_etc_services();
- my $nbports = 0;
- foreach my $item (split(/,/, $str)) {
- my $portlist = "";
- my $oldpon = undef;
- $nbports++;
- foreach my $pon (split(':', $item, 2)) {
- $pon = $services->{byname}->{$pon}->{port} if $services->{byname}->{$pon}->{port};
- if ($pon =~ m/^\d+$/){
- die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535;
- die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon);
- $oldpon = $pon;
- }else{
- die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon};
- }
- }
- }
-
- return ($nbports);
-}
-
-my $bridge_firewall_enabled = 0;
-
-sub enable_bridge_firewall {
-
- return if $bridge_firewall_enabled; # only once
-
- system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables");
- system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-ip6tables");
-
- $bridge_firewall_enabled = 1;
-}
-
-my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
-
-sub iptables {
- my ($cmd) = @_;
-
- run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {});
-}
-
-sub iptables_restore_cmdlist {
- my ($cmdlist) = @_;
-
- run_command("/sbin/iptables-restore -n", input => $cmdlist);
-}
-
-sub iptables_get_chains {
-
- my $res = {};
-
- # check what chains we want to track
- my $is_pvefw_chain = sub {
- my $name = shift;
-
- return 1 if $name =~ m/^PVEFW-\S+$/;
-
- return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
- return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT)$/;
- return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
-
- return undef;
- };
-
- my $table = '';
-
- my $parser = sub {
- my $line = shift;
-
- return if $line =~ m/^#/;
- return if $line =~ m/^\s*$/;
-
- if ($line =~ m/^\*(\S+)$/) {
- $table = $1;
- return;
- }
-
- return if $table ne 'filter';
-
- if ($line =~ m/^:(\S+)\s/) {
- my $chain = $1;
- return if !&$is_pvefw_chain($chain);
- $res->{$chain} = "unknown";
- } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
- my ($chain, $sig) = ($1, $2);
- return if !&$is_pvefw_chain($chain);
- $res->{$chain} = $sig;
- } else {
- # simply ignore the rest
- return;
- }
- };
-
- run_command("/sbin/iptables-save", outfunc => $parser);
-
- return $res;
-}
-
-sub iptables_chain_exist {
- my ($chain) = @_;
-
- eval{
- iptables("-n --list $chain");
- };
- return undef if $@;
-
- return 1;
-}
-
-sub iptables_rule_exist {
- my ($rule) = @_;
-
- eval{
- iptables("-C $rule");
- };
- return undef if $@;
-
- return 1;
-}
-
-sub ruleset_generate_rule {
- my ($ruleset, $chain, $rule, $actions, $goto) = @_;
-
- return if $rule->{disable};
-
- my $cmd = '';
-
- $cmd .= " -m iprange --src-range" if $rule->{nbsource} && $rule->{nbsource} > 1;
- $cmd .= " -s $rule->{source}" if $rule->{source};
- $cmd .= " -m iprange --dst-range" if $rule->{nbdest} && $rule->{nbdest} > 1;
- $cmd .= " -d $rule->{dest}" if $rule->{dest};
-
- if ($rule->{proto}) {
- $cmd .= " -p $rule->{proto}";
-
- my $multiport = 0;
- $multiport++ if $rule->{nbdport} && ($rule->{nbdport} > 1);
- $multiport++ if $rule->{nbsport} && ($rule->{nbsport} > 1);
-
- $cmd .= " --match multiport" if $multiport;
-
- die "multiport: option '--sports' cannot be used together with '--dports'\n"
- if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
-
- if ($rule->{dport}) {
- if ($rule->{proto} && $rule->{proto} eq 'icmp') {
- # Note: we use dport to store --icmp-type
- die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
- $cmd .= " -m icmp --icmp-type $rule->{dport}";
- } else {
- if ($rule->{nbdport} && $rule->{nbdport} > 1) {
- if ($multiport == 2) {
- $cmd .= " --ports $rule->{dport}";
- } else {
- $cmd .= " --dports $rule->{dport}";
- }
- } else {
- $cmd .= " --dport $rule->{dport}";
- }
- }
- }
-
- if ($rule->{sport}) {
- if ($rule->{nbsport} && $rule->{nbsport} > 1) {
- $cmd .= " --sports $rule->{sport}" if $multiport != 2;
- } else {
- $cmd .= " --sport $rule->{sport}";
- }
- }
- } elsif ($rule->{dport} || $rule->{sport}) {
- warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
- warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
- }
-
- $cmd .= " -m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
-
- if (my $action = $rule->{action}) {
- $action = $actions->{$action} if defined($actions->{$action});
- $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
- $cmd .= $goto ? " -g $action" : " -j $action";
- }
-
- ruleset_addrule($ruleset, $chain, $cmd) if $cmd;
-}
-
-sub ruleset_create_chain {
- my ($ruleset, $chain) = @_;
-
- die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
-
- die "chain '$chain' already exists\n" if $ruleset->{$chain};
-
- $ruleset->{$chain} = [];
-}
-
-sub ruleset_chain_exist {
- my ($ruleset, $chain) = @_;
-
- return $ruleset->{$chain} ? 1 : undef;
-}
-
-sub ruleset_addrule {
- my ($ruleset, $chain, $rule) = @_;
-
- die "no such chain '$chain'\n" if !$ruleset->{$chain};
-
- push @{$ruleset->{$chain}}, "-A $chain $rule";
-}
-
-sub ruleset_insertrule {
- my ($ruleset, $chain, $rule) = @_;
-
- die "no such chain '$chain'\n" if !$ruleset->{$chain};
-
- unshift @{$ruleset->{$chain}}, "-A $chain $rule";
-}
-
-sub generate_bridge_chains {
- my ($ruleset, $bridge) = @_;
-
- if (!ruleset_chain_exist($ruleset, "PVEFW-FORWARD")){
- ruleset_create_chain($ruleset, "PVEFW-FORWARD");
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
- }
-
- if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
- ruleset_create_chain($ruleset, "$bridge-FW");
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j DROP"); # disable interbridge routing
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j DROP"); # disable interbridge routing
- }
-
- if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
- ruleset_create_chain($ruleset, "$bridge-OUT");
- ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-in -j $bridge-OUT");
- }
-
- if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
- ruleset_create_chain($ruleset, "$bridge-IN");
- ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j $bridge-IN");
- ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
- # accept traffic to unmanaged bridge ports
- ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j ACCEPT ");
- }
-}
-
-sub generate_tap_rules_direction {
- my ($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, $direction) = @_;
-
- my $lc_direction = lc($direction);
- my $rules = $vmfw_conf->{$lc_direction};
-
- my $options = $vmfw_conf->{options};
- my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
-
- my $tapchain = "$iface-$direction";
-
- ruleset_create_chain($ruleset, $tapchain);
-
- if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
- ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
- }
-
- if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
- ruleset_addrule($ruleset, $tapchain, "-p udp -m udp --dport 67:68 -j ACCEPT");
- }
-
- if ($options->{tcpflags}) {
- ruleset_addrule($ruleset, $tapchain, "-p tcp -j PVEFW-tcpflags");
- }
-
- ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate INVALID -j DROP");
- ruleset_addrule($ruleset, $tapchain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
-
- if ($direction eq 'OUT' && defined($macaddr) &&
- !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
- ruleset_addrule($ruleset, $tapchain, "-m mac ! --mac-source $macaddr -j DROP");
- }
-
- if ($rules) {
- foreach my $rule (@$rules) {
- next if $rule->{iface} && $rule->{iface} ne $netid;
- # we go to $bridge-IN if accept in out rules
- if($rule->{action} =~ m/^(GROUP-(\S+))$/){
- $rule->{action} .= "-$direction";
- # generate empty group rule if don't exist
- if(!ruleset_chain_exist($ruleset, $rule->{action})){
- generate_group_rules($ruleset, $group_rules, $2);
- }
- ruleset_generate_rule($ruleset, $tapchain, $rule);
- ruleset_addrule($ruleset, $tapchain, "-m mark --mark 1 -j RETURN")
- if $direction eq 'OUT';
- } else {
- if ($direction eq 'OUT') {
- ruleset_generate_rule($ruleset, $tapchain, $rule,
- { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
- } else {
- ruleset_generate_rule($ruleset, $tapchain, $rule, { REJECT => "PVEFW-reject" });
- }
- }
- }
- }
-
- # implement policy
- my $policy;
-
- if ($direction eq 'OUT') {
- $policy = $options->{'policy-out'} || 'ACCEPT'; # allow everything by default
- } else {
- $policy = $options->{'policy-in'} || 'DROP'; # allow everything by default
- }
-
- if ($policy eq 'ACCEPT') {
- if ($direction eq 'OUT') {
- ruleset_addrule($ruleset, $tapchain, "-g PVEFW-SET-ACCEPT-MARK");
- } else {
- ruleset_addrule($ruleset, $tapchain, "-j ACCEPT");
- }
- } elsif ($policy eq 'DROP') {
-
- ruleset_addrule($ruleset, $tapchain, "-j PVEFW-Drop");
-
- ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-dropped: \" --log-level $loglevel")
- if defined($loglevel);
-
- ruleset_addrule($ruleset, $tapchain, "-j DROP");
- } elsif ($policy eq 'REJECT') {
- ruleset_addrule($ruleset, $tapchain, "-j PVEFW-Reject");
-
- ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-reject: \" --log-level $loglevel")
- if defined($loglevel);
-
- ruleset_addrule($ruleset, $tapchain, "-g PVEFW-reject");
- } else {
- # should not happen
- die "internal error: unknown policy '$policy'";
- }
-
- # plug the tap chain to bridge chain
- my $physdevdirection = $direction eq 'IN' ? "out" : "in";
- my $rule = "-m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain";
- ruleset_insertrule($ruleset, "$bridge-$direction", $rule);
-
- if ($direction eq 'OUT'){
- # add tap->host rules
- my $rule = "-m physdev --physdev-$physdevdirection $iface -j $tapchain";
- ruleset_addrule($ruleset, "PVEFW-INPUT", $rule);
- }
-}
-
-sub enablehostfw {
- my ($ruleset, $rules, $group_rules) = @_;
-
- # fixme: allow security groups
-
- my $options = $rules->{options};
-
- # host inbound firewall
- my $chain = "PVEFW-HOST-IN";
- ruleset_create_chain($ruleset, $chain);
-
- my $loglevel = get_option_log_level($options, "log_level_in");
-
- ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
- ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
- ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
- ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
- ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
- ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
-
- if ($rules->{in}) {
- foreach my $rule (@{$rules->{in}}) {
- # we use RETURN because we need to check also tap rules
- ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => 'RETURN', REJECT => "PVEFW-reject" });
- }
- }
-
- ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-IN dropped: \" --log-level $loglevel")
- if defined($loglevel);
-
- ruleset_addrule($ruleset, $chain, "-j DROP");
-
- # host outbound firewall
- $chain = "PVEFW-HOST-OUT";
- ruleset_create_chain($ruleset, $chain);
-
- $loglevel = get_option_log_level($options, "log_level_out");
-
- ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
- ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
- ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
- ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
- ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW -m multiport --dports 5404,5405 -j ACCEPT");
- ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
-
- if ($rules->{out}) {
- foreach my $rule (@{$rules->{out}}) {
- # we use RETURN because we need to check also tap rules
- ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => 'RETURN', REJECT => "PVEFW-reject" });
- }
- }
-
- ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-OUT dropped: \" --log-level $loglevel")
- if defined($loglevel);
-
- ruleset_addrule($ruleset, $chain, "-j DROP");
-
- ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
- ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
-}
-
-sub generate_group_rules {
- my ($ruleset, $group_rules, $group) = @_;
-
- my $rules = $group_rules->{$group};
-
- die "no such security group '$group'\n" if !$rules;
-
- my $chain = "GROUP-${group}-IN";
-
- ruleset_create_chain($ruleset, $chain);
-
- if ($rules->{in}) {
- foreach my $rule (@{$rules->{in}}) {
- ruleset_generate_rule($ruleset, $chain, $rule, { REJECT => "PVEFW-reject" });
- }
- }
-
- $chain = "GROUP-${group}-OUT";
-
- ruleset_create_chain($ruleset, $chain);
- ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
-
- if ($rules->{out}) {
- foreach my $rule (@{$rules->{out}}) {
- # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
- # check also other tap rules later
- ruleset_generate_rule($ruleset, $chain, $rule,
- { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
- }
- }
-}
-
-my $MAX_NETS = 32;
-my $valid_netdev_names = {};
-for (my $i = 0; $i < $MAX_NETS; $i++) {
- $valid_netdev_names->{"net$i"} = 1;
-}
-
-sub parse_fw_rule {
- my ($line, $need_iface, $allow_groups) = @_;
-
- my $macros = get_firewall_macros();
- my $protocols = get_etc_protocols();
-
- my ($action, $iface, $source, $dest, $proto, $dport, $sport);
-
- # we can add single line comments to the end of the rule
- my $comment = $1 if $line =~ s/#\s*(.*?)\s*$//;
-
- # we can disable a rule when prefixed with '|'
- my $disable = 1 if $line =~ s/^\|//;
-
- my @data = split(/\s+/, $line);
- my $expected_elements = $need_iface ? 7 : 6;
-
- die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
-
- if ($need_iface) {
- ($action, $iface, $source, $dest, $proto, $dport, $sport) = @data
- } else {
- ($action, $source, $dest, $proto, $dport, $sport) = @data;
- }
-
- die "incomplete rule\n" if !$action;
-
- my $macro;
- my $macro_name;
-
- if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
- # OK
- } elsif ($allow_groups && $action =~ m/^GROUP-(:?\S+)$/) {
- # OK
- } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
- ($macro_name, $action) = ($1, $2);
- my $lc_macro_name = lc($macro_name);
- my $preferred_name = $pve_fw_preferred_macro_names->{$lc_macro_name};
- $macro_name = $preferred_name if $preferred_name;
- $macro = $macros->{$lc_macro_name};
- die "unknown macro '$macro_name'\n" if !$macro;
- } else {
- die "unknown action '$action'\n";
- }
-
- if ($need_iface) {
- $iface = undef if $iface && $iface eq '-';
- die "unknown interface '$iface'\n"
- if defined($iface) && !$valid_netdev_names->{$iface};
- }
-
- $proto = undef if $proto && $proto eq '-';
- die "unknown protokol '$proto'\n" if $proto &&
- !(defined($protocols->{byname}->{$proto}) ||
- defined($protocols->{byid}->{$proto}));
-
- $source = undef if $source && $source eq '-';
- $dest = undef if $dest && $dest eq '-';
-
- $dport = undef if $dport && $dport eq '-';
- $sport = undef if $sport && $sport eq '-';
-
- my $nbsource = undef;
- my $nbdest = undef;
-
- $nbsource = parse_address_list($source) if $source;
- $nbdest = parse_address_list($dest) if $dest;
-
- my $rules = [];
-
- my $param = {
- disable => $disable,
- comment => $comment,
- action => $action,
- iface => $iface,
- source => $source,
- dest => $dest,
- nbsource => $nbsource,
- nbdest => $nbdest,
- proto => $proto,
- dport => $dport,
- sport => $sport,
- };
-
- if ($macro) {
- foreach my $templ (@$macro) {
- my $rule = {};
- my $param_used = {};
- foreach my $k (keys %$templ) {
- my $v = $templ->{$k};
- if ($v eq 'PARAM') {
- $v = $param->{$k};
- $param_used->{$k} = 1;
- } elsif ($v eq 'DEST') {
- $v = $param->{dest};
- $param_used->{dest} = 1;
- } elsif ($v eq 'SOURCE') {
- $v = $param->{source};
- $param_used->{source} = 1;
- }
-
- die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
- $rule->{$k} = $v;
- }
- foreach my $k (keys %$param) {
- next if !defined($param->{$k});
- next if $param_used->{$k};
- if (defined($rule->{$k})) {
- die "parameter '$k' already define in macro (value = '$rule->{$k}')\n"
- if $rule->{$k} ne $param->{$k};
- } else {
- $rule->{$k} = $param->{$k};
- }
- }
- push @$rules, $rule;
- }
- } else {
- push @$rules, $param;
- }
-
- foreach my $rule (@$rules) {
- $rule->{nbdport} = parse_port_name_number_or_range($rule->{dport})
- if defined($rule->{dport});
- $rule->{nbsport} = parse_port_name_number_or_range($rule->{sport})
- if defined($rule->{sport});
- }
-
- return $rules;
-}
-
-sub parse_vmfw_option {
- my ($line) = @_;
-
- my ($opt, $value);
-
- my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
-
- if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
- $opt = lc($1);
- $value = int($2);
- } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
- $opt = lc($1);
- $value = $2 ? lc($3) : '';
- } elsif ($line =~ m/^(policy-(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
- $opt = lc($1);
- $value = uc($3);
- } else {
- chomp $line;
- die "can't parse option '$line'\n"
- }
-
- return ($opt, $value);
-}
-
-sub parse_hostfw_option {
- my ($line) = @_;
-
- my ($opt, $value);
-
- my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
-
- if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
- $opt = lc($1);
- $value = int($2);
- } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
- $opt = lc($1);
- $value = $2 ? lc($3) : '';
- } elsif ($line =~ m/^(policy-(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
- $opt = lc($1);
- $value = uc($3);
- } else {
- chomp $line;
- die "can't parse option '$line'\n"
- }
-
- return ($opt, $value);
-}
-
-sub parse_vm_fw_rules {
- my ($filename, $fh) = @_;
-
- my $res = { in => [], out => [], options => {}};
-
- my $section;
-
- while (defined(my $line = <$fh>)) {
- next if $line =~ m/^#/;
- next if $line =~ m/^\s*$/;
-
- my $linenr = $fh->input_line_number();
- my $prefix = "$filename (line $linenr)";
-
- if ($line =~ m/^\[(\S+)\]\s*$/i) {
- $section = lc($1);
- warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
- next;
- }
- if (!$section) {
- warn "$prefix: skip line - no section";
- next;
- }
-
- next if !$res->{$section}; # skip undefined section
-
- if ($section eq 'options') {
- eval {
- my ($opt, $value) = parse_vmfw_option($line);
- $res->{options}->{$opt} = $value;
- };
- warn "$prefix: $@" if $@;
- next;
- }
-
- my $rules;
- eval { $rules = parse_fw_rule($line, 1, 1); };
- if (my $err = $@) {
- warn "$prefix: $err";
- next;
- }
-
- push @{$res->{$section}}, @$rules;
- }
-
- return $res;
-}
-
-sub parse_host_fw_rules {
- my ($filename, $fh) = @_;
-
- my $res = { in => [], out => [], options => {}};
-
- my $section;
-
- while (defined(my $line = <$fh>)) {
- next if $line =~ m/^#/;
- next if $line =~ m/^\s*$/;
-
- my $linenr = $fh->input_line_number();
- my $prefix = "$filename (line $linenr)";
-
- if ($line =~ m/^\[(\S+)\]\s*$/i) {
- $section = lc($1);
- warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
- next;
- }
- if (!$section) {
- warn "$prefix: skip line - no section";
- next;
- }
-
- next if !$res->{$section}; # skip undefined section
-
- if ($section eq 'options') {
- eval {
- print "PARSE:$line\n";
- my ($opt, $value) = parse_hostfw_option($line);
- $res->{options}->{$opt} = $value;
- };
- warn "$prefix: $@" if $@;
- next;
- }
-
- my $rules;
- eval { $rules = parse_fw_rule($line, 1, 1); };
- if (my $err = $@) {
- warn "$prefix: $err";
- next;
- }
-
- push @{$res->{$section}}, @$rules;
- }
-
- return $res;
-}
-
-sub parse_group_fw_rules {
- my ($filename, $fh) = @_;
-
- my $section;
- my $group;
-
- my $res = { in => [], out => [] };
-
- while (defined(my $line = <$fh>)) {
- next if $line =~ m/^#/;
- next if $line =~ m/^\s*$/;
-
- my $linenr = $fh->input_line_number();
- my $prefix = "$filename (line $linenr)";
-
- if ($line =~ m/^\[(in|out):(\S+)\]\s*$/i) {
- $section = lc($1);
- $group = lc($2);
- next;
- }
- if (!$section || !$group) {
- warn "$prefix: skip line - no section";
- next;
- }
-
- my $rules;
- eval { $rules = parse_fw_rule($line, 0, 0); };
- if (my $err = $@) {
- warn "$prefix: $err";
- next;
- }
-
- push @{$res->{$group}->{$section}}, @$rules;
- }
-
- return $res;
-}
-
-sub run_locked {
- my ($code, @param) = @_;
-
- my $timeout = 10;
-
- my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
-
- die $@ if $@;
-
- return $res;
-}
-
-sub read_local_vm_config {
-
- my $openvz = {};
-
- my $qemu = {};
-
- my $list = PVE::QemuServer::config_list();
-
- foreach my $vmid (keys %$list) {
- my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
- if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
- $qemu->{$vmid} = $conf;
- }
- }
-
- my $vmdata = { openvz => $openvz, qemu => $qemu };
-
- return $vmdata;
-};
-
-sub read_vm_firewall_rules {
- my ($vmdata) = @_;
- my $rules = {};
- foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
- my $filename = "/etc/pve/firewall/$vmid.fw";
- my $fh = IO::File->new($filename, O_RDONLY);
- next if !$fh;
-
- $rules->{$vmid} = parse_vm_fw_rules($filename, $fh);
- }
-
- return $rules;
-}
-
-sub get_option_log_level {
- my ($options, $k) = @_;
-
- my $v = $options->{$k};
- $v = $default_log_level if !defined($v);
-
- return undef if $v eq '' || $v eq 'nolog';
-
- $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
-
- return $v if ($v >= 0) && ($v <= 7);
-
- warn "unknown log level ($k = '$v')\n";
-
- return undef;
-}
-
-sub generate_std_chains {
- my ($ruleset, $options) = @_;
-
- my $loglevel = get_option_log_level($options, 'smurf_log_level');
-
- # same as shorewall smurflog.
- if (defined($loglevel)) {
- $pve_std_chains-> {'PVEFW-smurflog'} = [
- "-j LOG --log-prefix \"smurfs-dropped\" --log-level $loglevel",
- "-j DROP",
- ];
- } else {
- $pve_std_chains-> {'PVEFW-smurflog'} = [ "-j DROP" ];
- }
-
- # same as shorewall logflags action.
- $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
- if (defined($loglevel)) {
- $pve_std_chains-> {'PVEFW-logflags'} = [
- "-j LOG --log-prefix \"logflags-dropped:\" --log-level $loglevel --log-ip-options",
- "-j DROP",
- ];
- } else {
- $pve_std_chains-> {'PVEFW-logflags'} = [ "-j DROP" ];
- }
-
- foreach my $chain (keys %$pve_std_chains) {
- ruleset_create_chain($ruleset, $chain);
- foreach my $rule (@{$pve_std_chains->{$chain}}) {
- if (ref($rule)) {
- ruleset_generate_rule($ruleset, $chain, $rule);
- } else {
- ruleset_addrule($ruleset, $chain, $rule);
- }
- }
- }
-}
-
-sub save_pvefw_status {
- my ($status) = @_;
-
- die "unknown status '$status' - internal error"
- if $status !~ m/^(stopped|active)$/;
-
- mkdir dirname($pve_fw_status_filename);
- PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
-}
-
-sub read_pvefw_status {
-
- my $status = 'unknown';
-
- return 'stopped' if ! -f $pve_fw_status_filename;
-
- eval {
- $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
- };
- warn $@ if $@;
-
- return $status;
-}
-
-sub compile {
- my $vmdata = read_local_vm_config();
- my $rules = read_vm_firewall_rules($vmdata);
-
- my $group_rules = {};
- my $filename = "/etc/pve/firewall/groups.fw";
- if (my $fh = IO::File->new($filename, O_RDONLY)) {
- $group_rules = parse_group_fw_rules($filename, $fh);
- }
-
- #print Dumper($rules);
-
- my $ruleset = {};
-
- ruleset_create_chain($ruleset, "PVEFW-INPUT");
- ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
- ruleset_create_chain($ruleset, "PVEFW-FORWARD");
-
- my $host_options = {};
- my $host_rules;
-
- $filename = "/etc/pve/local/host.fw";
- if (my $fh = IO::File->new($filename, O_RDONLY)) {
- $host_rules = parse_host_fw_rules($filename, $fh);
- $host_options = $host_rules->{options};
- }
-
- generate_std_chains($ruleset, $host_options);
-
- my $hotsfw_enable = $host_rules && !(defined($host_options->{enable}) && ($host_options->{enable} == 0));
-
- enablehostfw($ruleset, $host_rules, $group_rules) if $hotsfw_enable;
-
- # generate firewall rules for QEMU VMs
- foreach my $vmid (keys %{$vmdata->{qemu}}) {
- my $conf = $vmdata->{qemu}->{$vmid};
- my $vmfw_conf = $rules->{$vmid};
- next if !$vmfw_conf;
- next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
-
- foreach my $netid (keys %$conf) {
- next if $netid !~ m/^net(\d+)$/;
- my $net = PVE::QemuServer::parse_net($conf->{$netid});
- next if !$net;
- my $iface = "tap${vmid}i$1";
-
- my $bridge = $net->{bridge};
- next if !$bridge; # fixme: ?
-
- $bridge .= "v$net->{tag}" if $net->{tag};
-
-
- generate_bridge_chains($ruleset, $bridge);
-
- my $macaddr = $net->{macaddr};
- generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'IN');
- generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'OUT');
- }
- }
-
- if ($hotsfw_enable) {
- # allow traffic from lo (ourself)
- ruleset_addrule($ruleset, "PVEFW-INPUT", "-i lo -j ACCEPT");
- }
-
- return $ruleset;
-}
-
-sub get_ruleset_status {
- my ($ruleset, $verbose) = @_;
-
- my $active_chains = iptables_get_chains();
-
- my $statushash = {};
-
- foreach my $chain (sort keys %$ruleset) {
- my $digest = Digest::SHA->new('sha1');
- foreach my $cmd (@{$ruleset->{$chain}}) {
- $digest->add("$cmd\n");
- }
- my $sig = $digest->b64digest;
- $statushash->{$chain}->{sig} = $sig;
-
- my $oldsig = $active_chains->{$chain};
- if (!defined($oldsig)) {
- $statushash->{$chain}->{action} = 'create';
- } else {
- if ($oldsig eq $sig) {
- $statushash->{$chain}->{action} = 'exists';
- } else {
- $statushash->{$chain}->{action} = 'update';
- }
- }
- print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
- foreach my $cmd (@{$ruleset->{$chain}}) {
- print "\t$cmd\n" if $verbose;
- }
- }
-
- foreach my $chain (sort keys %$active_chains) {
- if (!defined($ruleset->{$chain})) {
- my $sig = $active_chains->{$chain};
- $statushash->{$chain}->{action} = 'delete';
- $statushash->{$chain}->{sig} = $sig;
- print "delete $chain ($sig)\n" if $verbose;
- }
- }
-
- return $statushash;
-}
-
-sub print_ruleset {
- my ($ruleset) = @_;
-
- get_ruleset_status($ruleset, 1);
-}
-
-sub print_sig_rule {
- my ($chain, $sig) = @_;
-
- # We just use this to store a SHA1 checksum used to detect changes
- return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
-}
-
-sub get_rulset_cmdlist {
- my ($ruleset, $verbose) = @_;
-
- my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
-
- my $statushash = get_ruleset_status($ruleset, $verbose);
-
- # create missing chains first
- foreach my $chain (sort keys %$ruleset) {
- my $stat = $statushash->{$chain};
- die "internal error" if !$stat;
- next if $stat->{action} ne 'create';
-
- $cmdlist .= ":$chain - [0:0]\n";
- }
-
- my $rule = "INPUT -j PVEFW-INPUT";
- if (!PVE::Firewall::iptables_rule_exist($rule)) {
- $cmdlist .= "-A $rule\n";
- }
- $rule = "OUTPUT -j PVEFW-OUTPUT";
- if (!PVE::Firewall::iptables_rule_exist($rule)) {
- $cmdlist .= "-A $rule\n";
- }
-
- $rule = "FORWARD -j PVEFW-FORWARD";
- if (!PVE::Firewall::iptables_rule_exist($rule)) {
- $cmdlist .= "-A $rule\n";
- }
-
- foreach my $chain (sort keys %$ruleset) {
- my $stat = $statushash->{$chain};
- die "internal error" if !$stat;
-
- if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
- $cmdlist .= "-F $chain\n";
- foreach my $cmd (@{$ruleset->{$chain}}) {
- $cmdlist .= "$cmd\n";
- }
- $cmdlist .= print_sig_rule($chain, $stat->{sig});
- } elsif ($stat->{action} eq 'delete') {
- die "internal error"; # this should not happen
- } elsif ($stat->{action} eq 'exists') {
- # do nothing
- } else {
- die "internal error - unknown status '$stat->{action}'";
- }
- }
-
- foreach my $chain (keys %$statushash) {
- next if $statushash->{$chain}->{action} ne 'delete';
- $cmdlist .= "-F $chain\n";
- }
- foreach my $chain (keys %$statushash) {
- next if $statushash->{$chain}->{action} ne 'delete';
- next if $chain eq 'PVEFW-INPUT';
- next if $chain eq 'PVEFW-OUTPUT';
- next if $chain eq 'PVEFW-FORWARD';
- $cmdlist .= "-X $chain\n";
- }
-
- $cmdlist .= "COMMIT\n";
-
- return $cmdlist;
-}
-
-sub apply_ruleset {
- my ($ruleset, $verbose) = @_;
-
- enable_bridge_firewall();
-
- my $cmdlist = get_rulset_cmdlist($ruleset, $verbose);
-
- print $cmdlist if $verbose;
-
- iptables_restore_cmdlist($cmdlist);
-
- # test: re-read status and check if everything is up to date
- my $statushash = get_ruleset_status($ruleset);
-
- my $errors;
- foreach my $chain (sort keys %$ruleset) {
- my $stat = $statushash->{$chain};
- if ($stat->{action} ne 'exists') {
- warn "unable to update chain '$chain'\n";
- $errors = 1;
- }
- }
-
- die "unable to apply firewall changes\n" if $errors;
-}
-
-sub update {
- my ($start, $verbose) = @_;
-
- my $code = sub {
- my $status = read_pvefw_status();
-
- my $ruleset = PVE::Firewall::compile();
-
- if ($start || $status eq 'active') {
-
- save_pvefw_status('active') if ($status ne 'active');
-
- PVE::Firewall::apply_ruleset($ruleset, $verbose);
- } else {
- print "Firewall not active (status = $status)\n" if $verbose;
- }
- };
-
- run_locked($code);
-}
-
-
-1;
projects / pve-firewall.git / commitdiff