use warnings;
use strict;
use Data::Dumper;
+use Digest::SHA;
use PVE::Tools;
use PVE::QemuServer;
use File::Path;
use IO::File;
use Net::IP;
+use PVE::Tools qw(run_command lock_file);
use Data::Dumper;
-my $macros;
-sub get_shorewall_macros {
+my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
+
+# 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-logflags' => [
+ # same as shorewall logflags action. (fixme: enable/disable logging)
+ "-j LOG --log-prefix \"logflags-dropped:\" --log-level 4 --log-ip-options",
+ "-j DROP",
+ ],
+ '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-smurflog' => [
+ # same as shorewall smurflog. (fixme: enable/disable logging)
+ "-j LOG --log-prefix \"smurfs-dropped\" --log-level 4",
+ "-j DROP",
+ ],
+ '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 = {};
- return $macros if $macros;
+ while (my $line = <$fh>) {
+ chomp ($line);
+ next if $line =~m/^#/;
+ next if ($line =~m/^\s*$/);
- foreach my $path (</usr/share/shorewall/macro.*>) {
- if ($path =~ m|/macro\.(\S+)$|) {
- $macros->{$1} = 1;
+ if ($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};
}
}
- return $macros;
+
+ close($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;
}
-my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
+sub parse_port_name_number_or_range {
+ my ($str) = @_;
-my $generate_input_rule = sub {
- my ($zoneinfo, $rule, $net, $netid) = @_;
+ 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};
+ }
+ }
+ }
- my $zone = $net->{zone} || die "internal error";
- my $zid = $zoneinfo->{$zone}->{zoneref} || die "internal error";
- my $tap = $net->{tap} || die "internal error";
+ return ($nbports);
+}
- my $dest = "$zid:$tap";
+my $bridge_firewall_enabled = 0;
- if ($rule->{dest}) {
- $dest .= ":$rule->{dest}";
- }
+sub enable_bridge_firewall {
- my $action = $rule->{service} ?
- "$rule->{service}($rule->{action})" : $rule->{action};
+ return if $bridge_firewall_enabled; # only once
- my $sources = [];
+ system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables");
+ system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-ip6tables");
- if (!$rule->{source}) {
- push @$sources, 'all';
- } elsif ($zoneinfo->{$zone}->{type} eq 'bport') {
- my $bridge_zone = $zoneinfo->{$zone}->{bridge_zone} || die "internal error";
- my $zoneref = $zoneinfo->{$bridge_zone}->{zoneref} || die "internal error";
+ $bridge_firewall_enabled = 1;
+}
- # using 'all' does not work, so we create one rule for
- # each related zone on the same bridge
- push @$sources, "${zoneref}:$rule->{source}";
- foreach my $z (keys %$zoneinfo) {
- next if $z eq $zone;
- next if !$zoneinfo->{$z}->{bridge_zone};
- next if $zoneinfo->{$z}->{bridge_zone} ne $bridge_zone;
- $zoneref = $zoneinfo->{$z}->{zoneref} || die "internal error";
- push @$sources, "${zoneref}:$rule->{source}";
- }
- } else {
- push @$sources, "all:$rule->{source}";
- }
+my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
- my $out = '';
+sub iptables {
+ my ($cmd) = @_;
- foreach my $source (@$sources) {
- $out .= sprintf($rule_format, $action, $source, $dest, $rule->{proto} || '-',
- $rule->{dport} || '-', $rule->{sport} || '-');
- }
+ run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {});
+}
- return $out;
-};
+sub iptables_restore_cmdlist {
+ my ($cmdlist) = @_;
-my $generate_output_rule = sub {
- my ($zoneinfo, $rule, $net, $netid) = @_;
+ run_command("/sbin/iptables-restore -n", input => $cmdlist);
+}
- my $zone = $net->{zone} || die "internal error";
- my $zid = $zoneinfo->{$zone}->{zoneref} || die "internal error";
- my $tap = $net->{tap} || die "internal error";
+sub iptables_get_chains {
- my $action = $rule->{service} ?
- "$rule->{service}($rule->{action})" : $rule->{action};
-
- my $dest;
+ my $res = {};
- if (!$rule->{dest}) {
- $dest = 'all';
- } else {
- $dest = "all:$rule->{dest}";
- }
+ # check what chains we want to track
+ my $is_pvefw_chain = sub {
+ my $name = shift;
- return sprintf($rule_format, $action, "$zid:$tap", $dest,
- $rule->{proto} || '-', $rule->{dport} || '-', $rule->{sport} || '-');
-};
+ return 1 if $name =~ m/^PVEFW-\S+$/;
-# we need complete VM configuration of all VMs (openvz/qemu)
-# in vmdata
+ return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
+ return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT)$/;
+ return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
-my $compile_shorewall = sub {
- my ($targetdir, $vmdata, $rules) = @_;
+ return undef;
+ };
- # remove existing data ?
- foreach my $file (qw(params zones rules interfaces maclist policy)) {
- unlink "$targetdir/$file";
- }
+ my $table = '';
- my $netinfo;
+ my $parser = sub {
+ my $line = shift;
- my $zoneinfo = {
- fw => { type => 'firewall' },
- };
+ return if $line =~ m/^#/;
+ return if $line =~ m/^\s*$/;
- my $maclist = {};
+ if ($line =~ m/^\*(\S+)$/) {
+ $table = $1;
+ return;
+ }
- my $register_bridge;
+ return if $table ne 'filter';
- $register_bridge = sub {
- my ($bridge, $vlan) = @_;
+ if ($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;
+ }
+ };
- my $zone = 'z' . $bridge;
+ run_command("/sbin/iptables-save", outfunc => $parser);
- return $zone if $zoneinfo->{$zone};
+ return $res;
+}
- my $ext_zone = "z${bridge}ext";
+sub iptables_chain_exist {
+ my ($chain) = @_;
- $zoneinfo->{$zone} = {
- type => 'bridge',
- bridge => $bridge,
- bridge_ext_zone => $ext_zone,
- };
+ eval{
+ iptables("-n --list $chain");
+ };
+ return undef if $@;
- # physical input devices
- my $dir = "/sys/class/net/$bridge/brif";
- my $physical = {};
- PVE::Tools::dir_glob_foreach($dir, '((eth|bond).+)', sub {
- my ($slave) = @_;
- $physical->{$slave} = 1;
- });
+ return 1;
+}
- $zoneinfo->{$ext_zone} = {
- type => 'bport',
- bridge_zone => $zone,
- ifaces => $physical,
- };
+sub iptables_rule_exist {
+ my ($rule) = @_;
- return &$register_bridge("${bridge}v${vlan}") if defined($vlan);
-
- return $zone;
+ eval{
+ iptables("-C $rule");
};
+ return undef if $@;
- my $register_bridge_port = sub {
- my ($bridge, $vlan, $vmzone, $tap) = @_;
+ return 1;
+}
- my $bridge_zone = &$register_bridge($bridge, $vlan);
- my $zone = $bridge_zone . $vmzone;
+sub ruleset_generate_rule {
+ my ($ruleset, $chain, $rule, $actions, $goto) = @_;
- if (!$zoneinfo->{$zone}) {
- $zoneinfo->{$zone} = {
- type => 'bport',
- bridge_zone => $bridge_zone,
- ifaces => {},
- };
- }
+ return if $rule->{disable};
- $zoneinfo->{$zone}->{ifaces}->{$tap} = 1;
-
- return $zone;
- };
+ my $cmd = '';
- foreach my $vmid (keys %{$vmdata->{qemu}}) {
- $netinfo->{$vmid} = {};
- my $conf = $vmdata->{qemu}->{$vmid};
- foreach my $opt (keys %$conf) {
- next if $opt !~ m/^net(\d+)$/;
- my $netnum = $1;
- my $net = PVE::QemuServer::parse_net($conf->{$opt});
- next if !$net;
- die "implement me" if !$net->{bridge};
+ $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});
- my $vmzone = $conf->{zone} || "vm$vmid";
- $net->{tap} = "tap${vmid}i${netnum}";
- $maclist->{$net->{tap}} = $net->{macaddr} || die "internal error";
- $net->{zone} = &$register_bridge_port($net->{bridge}, $net->{tag}, $vmzone, $net->{tap});
- $netinfo->{$vmid}->{$opt} = $net;
+ if ($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 $rule->{sport};
}
- #print Dumper($netinfo);
+ $cmd .= " -m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
- # NOTE: zone names have length limit, so we need to
- # translate them into shorter names
+ 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";
+ }
- my $zoneid = 0;
- my $zonemap = { fw => 'fw' };
+ ruleset_addrule($ruleset, $chain, $cmd) if $cmd;
+}
- my $lookup_zonename = sub {
- my ($zone) = @_;
+sub ruleset_create_chain {
+ my ($ruleset, $chain) = @_;
- return $zonemap->{$zone} if defined($zonemap->{$zone});
- $zonemap->{$zone} = 'z' . $zoneid++;
+ die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
- return $zonemap->{$zone};
- };
+ die "chain '$chain' already exists\n" if $ruleset->{$chain};
- foreach my $z (sort keys %$zoneinfo) {
- $zoneinfo->{$z}->{id} = &$lookup_zonename($z);
- $zoneinfo->{$z}->{zonevar} = uc($z);
- $zoneinfo->{$z}->{zoneref} = '$' . $zoneinfo->{$z}->{zonevar};
- }
+ $ruleset->{$chain} = [];
+}
+
+sub ruleset_chain_exist {
+ my ($ruleset, $chain) = @_;
+
+ return $ruleset->{$chain} ? 1 : undef;
+}
+
+sub ruleset_addrule {
+ my ($ruleset, $chain, $rule) = @_;
- my $out;
+ die "no such chain '$chain'\n" if !$ruleset->{$chain};
- # dump params file
- $out = "# PVE zones\n";
- foreach my $z (sort keys %$zoneinfo) {
- $out .= "$zoneinfo->{$z}->{zonevar}=$zoneinfo->{$z}->{id}\n";
+ push @{$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");
}
- PVE::Tools::file_set_contents("$targetdir/params", $out);
- # dump zone file
+ if (!ruleset_chain_exist($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
+ }
- my $format = "%-30s %-10s %-15s\n";
- $out = sprintf($format, '#ZONE', 'TYPE', 'OPTIONS');
-
- foreach my $z (sort keys %$zoneinfo) {
- my $zid = $zoneinfo->{$z}->{zoneref};
- if ($zoneinfo->{$z}->{type} eq 'firewall') {
- $out .= sprintf($format, $zid, $zoneinfo->{$z}->{type}, '');
- } elsif ($zoneinfo->{$z}->{type} eq 'bridge') {
- $out .= sprintf($format, $zid, 'ipv4', '');
- } elsif ($zoneinfo->{$z}->{type} eq 'bport') {
- my $bridge_zone = $zoneinfo->{$z}->{bridge_zone} || die "internal error";
- my $bzid = $zoneinfo->{$bridge_zone}->{zoneref} || die "internal error";
- $out .= sprintf($format, "$zid:$bzid", 'bport', '');
- } else {
- die "internal error";
- }
+ 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");
}
- $out .= sprintf("#LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE\n");
+ if (!ruleset_chain_exist($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, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j ACCEPT ");
+ }
+}
- PVE::Tools::file_set_contents("$targetdir/zones", $out);
+sub generate_tap_rules_direction {
+ my ($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, $direction) = @_;
- # dump interfaces
+ my $rules = $vmfw_conf->{lc($direction)};
+ my $options = $vmfw_conf->{options};
- $format = "%-25s %-20s %-10s %-15s\n";
- $out = sprintf($format, '#ZONE', 'INTERFACE', 'BROADCAST', 'OPTIONS');
+ my $tapchain = "$iface-$direction";
- my $maclist_format = "%-15s %-15s %-15s\n";
- my $macs = sprintf($maclist_format, '#DISPOSITION', 'INTERFACE', 'MACZONE');
+ ruleset_create_chain($ruleset, $tapchain);
- foreach my $z (sort keys %$zoneinfo) {
- my $zid = $zoneinfo->{$z}->{zoneref};
- if ($zoneinfo->{$z}->{type} eq 'firewall') {
- # do nothing;
- } elsif ($zoneinfo->{$z}->{type} eq 'bridge') {
- my $bridge = $zoneinfo->{$z}->{bridge} || die "internal error";
- $out .= sprintf($format, $zid, $bridge, 'detect', 'bridge,optional');
- } elsif ($zoneinfo->{$z}->{type} eq 'bport') {
- my $ifaces = $zoneinfo->{$z}->{ifaces};
- foreach my $iface (sort keys %$ifaces) {
- my $bridge_zone = $zoneinfo->{$z}->{bridge_zone} || die "internal error";
- my $bridge = $zoneinfo->{$bridge_zone}->{bridge} || die "internal error";
- my $iftxt = "$bridge:$iface";
+ if (!(defined($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, $tapchain, "-p udp -m udp --dport 67:68 -j ACCEPT");
+ }
- if ($maclist->{$iface}) {
- $out .= sprintf($format, $zid, $iftxt, '-', 'maclist');
- $macs .= sprintf($maclist_format, 'ACCEPT', $iface, $maclist->{$iface});
+ 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 {
- $out .= sprintf($format, $zid, $iftxt, '-', '');
+ ruleset_generate_rule($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, $tapchain, "-g PVEFW-SET-ACCEPT-MARK");
} else {
- die "internal error";
+ ruleset_addrule($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 4");
+ 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 4");
+ ruleset_addrule($ruleset, $tapchain, "-g PVEFW-reject");
+ } else {
+ # should not happen
+ die "internal error: unknown policy '$policy'";
}
- $out .= sprintf("#LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE\n");
+ # 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", $rule);
- PVE::Tools::file_set_contents("$targetdir/interfaces", $out);
+ if ($direction eq 'OUT'){
+ # add tap->host rules
+ my $rule = "-m physdev --physdev-$physdevdirection $iface -j $tapchain";
+ ruleset_addrule($ruleset, "PVEFW-INPUT", $rule);
+ }
+}
- # dump maclist
- PVE::Tools::file_set_contents("$targetdir/maclist", $macs);
+sub enablehostfw {
+ my ($ruleset, $rules, $group_rules) = @_;
- # dump policy
+ # fixme: allow security groups
- $format = "%-15s %-15s %-15s %s\n";
- $out = sprintf($format, '#SOURCE', 'DEST', 'POLICY', 'LOG');
- $out .= sprintf($format, 'fw', 'all', 'ACCEPT', '');
+ # host inbound firewall
+ my $chain = "PVEFW-HOST-IN";
+ ruleset_create_chain($ruleset, $chain);
- # we need to disable intra-zone traffic on bridges. Else traffic
- # from untracked interfaces simply pass the firewall
- foreach my $z (sort keys %$zoneinfo) {
- my $zid = $zoneinfo->{$z}->{zoneref};
- if ($zoneinfo->{$z}->{type} eq 'bridge') {
- $out .= sprintf($format, $zid, $zid, 'REJECT', 'info');
- }
+ ruleset_addrule($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, $chain, "-j LOG --log-prefix \"kvmhost-IN dropped: \" --log-level 4");
+ ruleset_addrule($ruleset, $chain, "-j DROP");
+
+ # host outbound firewall
+ $chain = "PVEFW-HOST-OUT";
+ ruleset_create_chain($ruleset, $chain);
+
+ ruleset_addrule($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" });
+ }
}
- $out .= sprintf($format, 'all', 'all', 'REJECT', 'info');
- PVE::Tools::file_set_contents("$targetdir/policy", $out);
+ ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-OUT dropped: \" --log-level 4");
+ ruleset_addrule($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" });
+ }
+ }
- # dump rules
- $out = '';
+ $chain = "GROUP-${group}-OUT";
- $out = sprintf($rule_format, '#ACTION', 'SOURCE', 'DEST', 'PROTO', 'DPORT', 'SPORT');
- foreach my $vmid (sort keys %$rules) {
- my $inrules = $rules->{$vmid}->{in};
- my $outrules = $rules->{$vmid}->{out};
+ ruleset_create_chain($ruleset, $chain);
+ ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
- if (scalar(@$inrules)) {
- $out .= "# IN to VM $vmid\n";
- foreach my $rule (@$inrules) {
- foreach my $netid (keys %{$netinfo->{$vmid}}) {
- my $net = $netinfo->{$vmid}->{$netid};
- next if $rule->{iface} && $rule->{iface} ne $netid;
- $out .= &$generate_input_rule($zoneinfo, $rule, $net, $netid);
+ if ($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};
+ $param_used->{source} = 1;
}
- }
- }
- if (scalar(@$outrules)) {
- $out .= "# OUT from VM $vmid\n";
- foreach my $rule (@$outrules) {
- foreach my $netid (keys %{$netinfo->{$vmid}}) {
- my $net = $netinfo->{$vmid}->{$netid};
- next if $rule->{iface} && $rule->{iface} ne $netid;
- $out .= &$generate_output_rule($zoneinfo, $rule, $net, $netid);
+ die "missing parameter '$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, $param;
}
- PVE::Tools::file_set_contents("$targetdir/rules", $out);
-};
+ 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 $rules;
+}
-sub parse_fw_rules {
- my ($filename, $fh) = @_;
+sub parse_fw_option {
+ my ($line) = @_;
- my $section;
+ my ($opt, $value);
- my $res = { in => [], out => [] };
+ if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
+ $opt = lc($1);
+ $value = int($2);
+ } elsif ($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"
+ }
- my $macros = PVE::Firewall::get_shorewall_macros();
+ return ($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 $line =~ m/^\s*$/;
- if ($line =~ m/^\[(in|out)\]\s*$/i) {
+ 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 "$prefix: skip line - no section";
next;
}
- next if !$section;
- my ($action, $iface, $source, $dest, $proto, $dport, $sport) =
- split(/\s+/, $line);
+ next if !$res->{$section}; # skip undefined section
- if (!$action) {
- warn "skip incomplete line\n";
+ if ($section eq 'options') {
+ eval {
+ my ($opt, $value) = parse_fw_option($line);
+ $res->{options}->{$opt} = $value;
+ };
+ warn "$prefix: $@" if $@;
next;
}
- my $service;
- if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
- # OK
- } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
- ($service, $action) = ($1, $2);
- if (!$macros->{$service}) {
- warn "unknown service '$service'\n";
- next;
- }
- } else {
- warn "unknown action '$action'\n";
+ my $rules;
+ eval { $rules = parse_fw_rule($line, 1, 1); };
+ if (my $err = $@) {
+ warn "$prefix: $err";
next;
}
- $iface = undef if $iface && $iface eq '-';
- if ($iface && $iface !~ m/^(net0|net1|net2|net3|net4|net5)$/) {
- warn "unknown interface '$iface'\n";
+ push @{$res->{$section}}, @$rules;
+ }
+
+ return $res;
+}
+
+sub parse_host_fw_rules {
+ my ($filename, $fh) = @_;
+
+ my $res = { in => [], out => [] };
+
+ 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/^\[(in|out)\]\s*$/i) {
+ $section = lc($1);
+ next;
+ }
+ if (!$section) {
+ warn "$prefix: skip line - no section";
next;
}
- $proto = undef if $proto && $proto eq '-';
- if ($proto && $proto !~ m/^(icmp|tcp|udp)$/) {
- warn "unknown protokol '$proto'\n";
+ my $rules;
+ eval { $rules = parse_fw_rule($line, 1, 1); };
+ if (my $err = $@) {
+ warn "$prefix: $err";
next;
}
- $source = undef if $source && $source eq '-';
- $dest = undef if $dest && $dest eq '-';
+ push @{$res->{$section}}, @$rules;
+ }
- $dport = undef if $dport && $dport eq '-';
- $sport = undef if $sport && $sport eq '-';
+ return $res;
+}
- eval {
- parse_address_list($source) if $source;
- parse_address_list($dest) if $dest;
+sub parse_group_fw_rules {
+ my ($filename, $fh) = @_;
- };
- if (my $err = $@) {
- warn $err;
+ 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;
+ }
- my $rule = {
- action => $action,
- service => $service,
- iface => $iface,
- source => $source,
- dest => $dest,
- proto => $proto,
- dport => $dport,
- sport => $sport,
- };
+ return $res;
+}
- push @{$res->{$section}}, $rule;
- }
+sub run_locked {
+ my ($code, @param) = @_;
+
+ my $timeout = 10;
+
+ my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
+
+ die $@ if $@;
return $res;
}
my $list = PVE::QemuServer::config_list();
foreach my $vmid (keys %$list) {
- #next if !($vmid eq '100' || $vmid eq '102');
my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
$qemu->{$vmid} = $conf;
my $fh = IO::File->new($filename, O_RDONLY);
next if !$fh;
- $rules->{$vmid} = parse_fw_rules($filename, $fh);
+ $rules->{$vmid} = parse_vm_fw_rules($filename, $fh);
}
return $rules;
}
-sub compile {
+sub generate_std_chains {
+ my ($ruleset) = @_;
+
+ 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 compile {
my $vmdata = read_local_vm_config();
my $rules = read_vm_firewall_rules($vmdata);
- # print Dumper($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");
+
+ generate_std_chains($ruleset);
+
+ my $enable_hostfw = 0;
+ $filename = "/etc/pve/local/host.fw";
+ if (my $fh = IO::File->new($filename, O_RDONLY)) {
+ my $host_rules = parse_host_fw_rules($filename, $fh);
+
+ $enable_hostfw = 1;
+
+ enablehostfw($ruleset, $host_rules, $group_rules);
+ }
+
+ # 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, $bridge, 'OUT');
+ }
+ }
+
+ if ($enable_hostfw) {
+ # 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 $swdir = '/etc/shorewall';
- mkdir $swdir;
+ 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 $verbose;
+ }
+ }
- &$compile_shorewall($swdir, $vmdata, $rules);
+ 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;
+ }
+ }
- PVE::Tools::run_command(['shorewall', 'compile']);
+ return $statushash;
}
-sub compile_and_start {
- my ($restart) = @_;
+sub print_ruleset {
+ my ($ruleset) = @_;
+
+ get_ruleset_status($ruleset, 1);
+}
- compile();
+sub print_sig_rule {
+ my ($chain, $sig) = @_;
- PVE::Tools::run_command(['shorewall', $restart ? 'restart' : 'start']);
+ # We just use this to store a SHA1 checksum used to detect changes
+ return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
}
+sub apply_ruleset {
+ my ($ruleset, $verbose) = @_;
+
+ enable_bridge_firewall();
+
+ 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";
+
+ print $cmdlist if $verbose;
+
+ iptables_restore_cmdlist($cmdlist);
+
+ # test: re-read status and check if everything is up to date
+ $statushash = get_ruleset_status($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;
+}
1;
projects / pve-firewall.git / blobdiff