From: Dietmar Maurer Date: Mon, 3 Mar 2014 08:40:04 +0000 (+0100) Subject: assemble debian package X-Git-Url: https://git.proxmox.com/?p=pve-firewall.git;a=commitdiff_plain;h=bb272dd311e39cd0d76a01d28c600363e95bc731 assemble debian package --- diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..7477d96 --- /dev/null +++ b/Makefile @@ -0,0 +1,55 @@ +RELEASE=3.3 + +VERSION=1.0 +PKGREL=1 + +PACKAGE=pve-firewall + +PREFIX=/usr +BINDIR=${PREFIX}/bin +SBINDIR=${PREFIX}/sbin +MANDIR=${PREFIX}/share/man +DOCDIR=${PREFIX}/share/doc +MAN1DIR=${MANDIR}/man1/ +PERLDIR=${PREFIX}/share/perl5 + +ARCH=all +GITVERSION:=$(shell cat .git/refs/heads/master) + +DEB=${PACKAGE}_${VERSION}-${PKGREL}_${ARCH}.deb + +all: ${DEB} + +.PHONY: dinstall +dinstall: deb + dpkg -i ${DEB} + + +.PHONY: deb +deb ${DEB}: + rm -rf build + rsync -a src/ build + rsync -a debian/ build/debian + echo "git clone git://git.proxmox.com/git/pve-firewall.git\\ngit checkout ${GITVERSION}" > build/debian/SOURCE + # install + cd build; dpkg-buildpackage -rfakeroot -b -us -uc + lintian ${DEB} + +.PHONY: clean +clean: + rm -rf *~ debian/*~ src/*~ *.deb *.changes build ${PACKAGE}-*.tar.gz + +.PHONY: distclean +distclean: clean + + +.PHONY: upload +upload: ${DEB} + umount /pve/${RELEASE}; mount /pve/${RELEASE} -o rw + mkdir -p /pve/${RELEASE}/extra + rm -f /pve/${RELEASE}/extra/${PACKAGE}_*.deb + rm -f /pve/${RELEASE}/extra/Packages* + cp ${DEB} /pve/${RELEASE}/extra + cd /pve/${RELEASE}/extra; dpkg-scanpackages . /dev/null > Packages; gzip -9c Packages > Packages.gz + umount /pve/${RELEASE}; mount /pve/${RELEASE} -o ro + diff --git a/PVE/Firewall.pm b/PVE/Firewall.pm deleted file mode 100644 index d18809a..0000000 --- a/PVE/Firewall.pm +++ /dev/null @@ -1,1725 +0,0 @@ -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; diff --git a/debian/changelog b/debian/changelog new file mode 100644 index 0000000..0c99eaf --- /dev/null +++ b/debian/changelog @@ -0,0 +1,6 @@ +pve-firewall (1.0-1) unstable; urgency=low + + * initial package + + -- Proxmox Support Team Mon, 03 Mar 2014 08:37:06 +0100 + diff --git a/debian/compat b/debian/compat new file mode 100644 index 0000000..7f8f011 --- /dev/null +++ b/debian/compat @@ -0,0 +1 @@ +7 diff --git a/debian/control b/debian/control new file mode 100644 index 0000000..1387783 --- /dev/null +++ b/debian/control @@ -0,0 +1,12 @@ +Source: pve-firewall +Section: admin +Priority: extra +Maintainer: Proxmox Support Team +Build-Depends: debhelper (>= 7.0.50~) +Standards-Version: 3.8.4 + +Package: pve-firewall +Architecture: all +Depends: ${perl:Depends}, ${misc:Depends}, libpve-common-perl, qemu-server +Description: Proxmox VE Firewall + This package contains the Proxmox VE Firewall. diff --git a/debian/copyright b/debian/copyright new file mode 100644 index 0000000..af9303c --- /dev/null +++ b/debian/copyright @@ -0,0 +1,16 @@ +Copyright (C) 2014 Proxmox Server Solutions GmbH + +This software is written by Proxmox Server Solutions GmbH + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU Affero General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Affero General Public License for more details. + +You should have received a copy of the GNU Affero General Public License +along with this program. If not, see . diff --git a/debian/docs b/debian/docs new file mode 100644 index 0000000..8696672 --- /dev/null +++ b/debian/docs @@ -0,0 +1 @@ +debian/SOURCE diff --git a/debian/rules b/debian/rules new file mode 100755 index 0000000..b760bee --- /dev/null +++ b/debian/rules @@ -0,0 +1,13 @@ +#!/usr/bin/make -f +# -*- makefile -*- +# Sample debian/rules that uses debhelper. +# This file was originally written by Joey Hess and Craig Small. +# As a special exception, when this file is copied by dh-make into a +# dh-make output file, you may use that output file without restriction. +# This special exception was added by Craig Small in version 0.37 of dh-make. + +# Uncomment this to turn on verbose mode. +#export DH_VERBOSE=1 + +%: + dh $@ diff --git a/pvefw b/pvefw deleted file mode 100755 index 1eff5ca..0000000 --- a/pvefw +++ /dev/null @@ -1,242 +0,0 @@ -#!/usr/bin/perl -w - -use strict; -use lib qw(.); -use PVE::Firewall; - -use PVE::SafeSyslog; -use PVE::Cluster; -use PVE::INotify; -use PVE::RPCEnvironment; - -use PVE::JSONSchema qw(get_standard_option); - -use PVE::CLIHandler; - -use base qw(PVE::CLIHandler); - -$ENV{'PATH'} = '/sbin:/bin:/usr/sbin:/usr/bin'; - -initlog ('pvefw'); - -die "please run as root\n" if $> != 0; - -PVE::INotify::inotify_init(); - -my $rpcenv = PVE::RPCEnvironment->init('cli'); - -$rpcenv->init_request(); -$rpcenv->set_language($ENV{LANG}); -$rpcenv->set_user('root@pam'); - -__PACKAGE__->register_method ({ - name => 'compile', - path => 'compile', - method => 'POST', - description => "Compile amd print firewall rules. This is only for testing.", - parameters => { - additionalProperties => 0, - properties => { - verbose => { - description => "Verbose output.", - type => "boolean", - optional => 1, - }, - }, - }, - returns => { type => 'null' }, - - code => sub { - my ($param) = @_; - - my $rpcenv = PVE::RPCEnvironment::get(); - - $param->{verbose} = 1 - if !defined($param->{verbose}) && ($rpcenv->{type} eq 'cli'); - - my $code = sub { - my $ruleset = PVE::Firewall::compile(); - PVE::Firewall::get_ruleset_status($ruleset, 1) if $param->{verbose}; - }; - - PVE::Firewall::run_locked($code); - - return undef; - }}); - -__PACKAGE__->register_method ({ - name => 'status', - path => 'status', - method => 'GET', - description => "Get firewall status.", - parameters => { - additionalProperties => 0, - properties => {}, - }, - returns => { - type => 'object', - additionalProperties => 0, - properties => { - status => { - type => 'string', - enum => ['unknown', 'stopped', 'active'], - }, - changes => { - description => "Set when there are pending changes.", - type => 'boolean', - optional => 1, - } - }, - }, - code => sub { - my ($param) = @_; - - my $rpcenv = PVE::RPCEnvironment::get(); - - $param->{verbose} = 1 - if !defined($param->{verbose}) && ($rpcenv->{type} eq 'cli'); - - my $code = sub { - my $status = PVE::Firewall::read_pvefw_status(); - - my $res = { status => $status }; - if ($status eq 'active') { - my $ruleset = PVE::Firewall::compile(); - my $cmdlist = PVE::Firewall::get_rulset_cmdlist($ruleset); - - if ($cmdlist ne "*filter\nCOMMIT\n") { - $res->{changes} = 1; - } - } - - return $res; - }; - - return PVE::Firewall::run_locked($code); - }}); - -__PACKAGE__->register_method ({ - name => 'start', - path => 'start', - method => 'POST', - description => "Start (or simply update if already active) firewall.", - parameters => { - additionalProperties => 0, - properties => { - verbose => { - description => "Verbose output.", - type => "boolean", - optional => 1, - default => 0, - }, - }, - }, - returns => { type => 'null' }, - - code => sub { - my ($param) = @_; - - PVE::Firewall::update(1, $param->{verbose}); - - return undef; - }}); - -__PACKAGE__->register_method ({ - name => 'update', - path => 'update', - method => 'POST', - description => "Check firewall rules. Then update the rules if the firewall is active.", - parameters => { - additionalProperties => 0, - properties => { - verbose => { - description => "Verbose output.", - type => "boolean", - optional => 1, - default => 0, - }, - }, - }, - returns => { type => 'null' }, - - code => sub { - my ($param) = @_; - - PVE::Firewall::update(0, $param->{verbose}); - - return undef; - }}); - -__PACKAGE__->register_method ({ - name => 'stop', - path => 'stop', - method => 'POST', - description => "Stop firewall. This will remove all rules installed by this script. The host is then unprotected.", - parameters => { - additionalProperties => 0, - properties => {}, - }, - returns => { type => 'null' }, - - code => sub { - my ($param) = @_; - - my $code = sub { - - my $chash = PVE::Firewall::iptables_get_chains(); - my $cmdlist = "*filter\n"; - my $rule = "INPUT -j PVEFW-INPUT"; - if (PVE::Firewall::iptables_rule_exist($rule)) { - $cmdlist .= "-D $rule\n"; - } - $rule = "OUTPUT -j PVEFW-OUTPUT"; - if (PVE::Firewall::iptables_rule_exist($rule)) { - $cmdlist .= "-D $rule\n"; - } - - $rule = "FORWARD -j PVEFW-FORWARD"; - if (PVE::Firewall::iptables_rule_exist($rule)) { - $cmdlist .= "-D $rule\n"; - } - - foreach my $chain (keys %$chash) { - $cmdlist .= "-F $chain\n"; - } - foreach my $chain (keys %$chash) { - $cmdlist .= "-X $chain\n"; - } - $cmdlist .= "COMMIT\n"; - - PVE::Firewall::iptables_restore_cmdlist($cmdlist); - - PVE::Firewall::save_pvefw_status('stopped'); - }; - - PVE::Firewall::run_locked($code); - - return undef; - }}); - -my $nodename = PVE::INotify::nodename(); - -my $cmddef = { - compile => [ __PACKAGE__, 'compile', []], - start => [ __PACKAGE__, 'start', []], - update => [ __PACKAGE__, 'update', []], - status => [ __PACKAGE__, 'status', [], undef, sub { - my $res = shift; - if ($res->{changes}) { - print "Status: $res->{status} (pending changes)\n"; - } else { - print "Status: $res->{status}\n"; - } - }], - stop => [ __PACKAGE__, 'stop', []], -}; - -my $cmd = shift; - -PVE::CLIHandler::handle_cmd($cmddef, "pvefw", $cmd, \@ARGV, undef, $0); - -exit(0); - diff --git a/src/Makefile b/src/Makefile new file mode 100644 index 0000000..3a578cd --- /dev/null +++ b/src/Makefile @@ -0,0 +1,29 @@ + +PREFIX=/usr +BINDIR=${PREFIX}/bin +SBINDIR=${PREFIX}/bin +MANDIR=${PREFIX}/share/man +DOCDIR=${PREFIX}/share/doc +MAN1DIR=${MANDIR}/man1/ +PERLDIR=${PREFIX}/share/perl5 + +LIB_SOURCES= \ + Firewall.pm + +all: + +.PHONY: install +install: + install -d -m 0755 ${DESTDIR}/${SBINDIR} + install -m 0755 pvefw ${DESTDIR}/${SBINDIR} + install -d -m 0755 ${DESTDIR}${PERLDIR}/PVE + for i in ${LIB_SOURCES}; do install -D -m 0644 PVE/$$i ${DESTDIR}${PERLDIR}/PVE/$$i; done + + +.PHONY: clean +clean: + rm -rf *~ + +.PHONY: distclean +distclean: clean + diff --git a/src/PVE/Firewall.pm b/src/PVE/Firewall.pm new file mode 100644 index 0000000..d18809a --- /dev/null +++ b/src/PVE/Firewall.pm @@ -0,0 +1,1725 @@ +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; diff --git a/src/pvefw b/src/pvefw new file mode 100755 index 0000000..1eff5ca --- /dev/null +++ b/src/pvefw @@ -0,0 +1,242 @@ +#!/usr/bin/perl -w + +use strict; +use lib qw(.); +use PVE::Firewall; + +use PVE::SafeSyslog; +use PVE::Cluster; +use PVE::INotify; +use PVE::RPCEnvironment; + +use PVE::JSONSchema qw(get_standard_option); + +use PVE::CLIHandler; + +use base qw(PVE::CLIHandler); + +$ENV{'PATH'} = '/sbin:/bin:/usr/sbin:/usr/bin'; + +initlog ('pvefw'); + +die "please run as root\n" if $> != 0; + +PVE::INotify::inotify_init(); + +my $rpcenv = PVE::RPCEnvironment->init('cli'); + +$rpcenv->init_request(); +$rpcenv->set_language($ENV{LANG}); +$rpcenv->set_user('root@pam'); + +__PACKAGE__->register_method ({ + name => 'compile', + path => 'compile', + method => 'POST', + description => "Compile amd print firewall rules. This is only for testing.", + parameters => { + additionalProperties => 0, + properties => { + verbose => { + description => "Verbose output.", + type => "boolean", + optional => 1, + }, + }, + }, + returns => { type => 'null' }, + + code => sub { + my ($param) = @_; + + my $rpcenv = PVE::RPCEnvironment::get(); + + $param->{verbose} = 1 + if !defined($param->{verbose}) && ($rpcenv->{type} eq 'cli'); + + my $code = sub { + my $ruleset = PVE::Firewall::compile(); + PVE::Firewall::get_ruleset_status($ruleset, 1) if $param->{verbose}; + }; + + PVE::Firewall::run_locked($code); + + return undef; + }}); + +__PACKAGE__->register_method ({ + name => 'status', + path => 'status', + method => 'GET', + description => "Get firewall status.", + parameters => { + additionalProperties => 0, + properties => {}, + }, + returns => { + type => 'object', + additionalProperties => 0, + properties => { + status => { + type => 'string', + enum => ['unknown', 'stopped', 'active'], + }, + changes => { + description => "Set when there are pending changes.", + type => 'boolean', + optional => 1, + } + }, + }, + code => sub { + my ($param) = @_; + + my $rpcenv = PVE::RPCEnvironment::get(); + + $param->{verbose} = 1 + if !defined($param->{verbose}) && ($rpcenv->{type} eq 'cli'); + + my $code = sub { + my $status = PVE::Firewall::read_pvefw_status(); + + my $res = { status => $status }; + if ($status eq 'active') { + my $ruleset = PVE::Firewall::compile(); + my $cmdlist = PVE::Firewall::get_rulset_cmdlist($ruleset); + + if ($cmdlist ne "*filter\nCOMMIT\n") { + $res->{changes} = 1; + } + } + + return $res; + }; + + return PVE::Firewall::run_locked($code); + }}); + +__PACKAGE__->register_method ({ + name => 'start', + path => 'start', + method => 'POST', + description => "Start (or simply update if already active) firewall.", + parameters => { + additionalProperties => 0, + properties => { + verbose => { + description => "Verbose output.", + type => "boolean", + optional => 1, + default => 0, + }, + }, + }, + returns => { type => 'null' }, + + code => sub { + my ($param) = @_; + + PVE::Firewall::update(1, $param->{verbose}); + + return undef; + }}); + +__PACKAGE__->register_method ({ + name => 'update', + path => 'update', + method => 'POST', + description => "Check firewall rules. Then update the rules if the firewall is active.", + parameters => { + additionalProperties => 0, + properties => { + verbose => { + description => "Verbose output.", + type => "boolean", + optional => 1, + default => 0, + }, + }, + }, + returns => { type => 'null' }, + + code => sub { + my ($param) = @_; + + PVE::Firewall::update(0, $param->{verbose}); + + return undef; + }}); + +__PACKAGE__->register_method ({ + name => 'stop', + path => 'stop', + method => 'POST', + description => "Stop firewall. This will remove all rules installed by this script. The host is then unprotected.", + parameters => { + additionalProperties => 0, + properties => {}, + }, + returns => { type => 'null' }, + + code => sub { + my ($param) = @_; + + my $code = sub { + + my $chash = PVE::Firewall::iptables_get_chains(); + my $cmdlist = "*filter\n"; + my $rule = "INPUT -j PVEFW-INPUT"; + if (PVE::Firewall::iptables_rule_exist($rule)) { + $cmdlist .= "-D $rule\n"; + } + $rule = "OUTPUT -j PVEFW-OUTPUT"; + if (PVE::Firewall::iptables_rule_exist($rule)) { + $cmdlist .= "-D $rule\n"; + } + + $rule = "FORWARD -j PVEFW-FORWARD"; + if (PVE::Firewall::iptables_rule_exist($rule)) { + $cmdlist .= "-D $rule\n"; + } + + foreach my $chain (keys %$chash) { + $cmdlist .= "-F $chain\n"; + } + foreach my $chain (keys %$chash) { + $cmdlist .= "-X $chain\n"; + } + $cmdlist .= "COMMIT\n"; + + PVE::Firewall::iptables_restore_cmdlist($cmdlist); + + PVE::Firewall::save_pvefw_status('stopped'); + }; + + PVE::Firewall::run_locked($code); + + return undef; + }}); + +my $nodename = PVE::INotify::nodename(); + +my $cmddef = { + compile => [ __PACKAGE__, 'compile', []], + start => [ __PACKAGE__, 'start', []], + update => [ __PACKAGE__, 'update', []], + status => [ __PACKAGE__, 'status', [], undef, sub { + my $res = shift; + if ($res->{changes}) { + print "Status: $res->{status} (pending changes)\n"; + } else { + print "Status: $res->{status}\n"; + } + }], + stop => [ __PACKAGE__, 'stop', []], +}; + +my $cmd = shift; + +PVE::CLIHandler::handle_cmd($cmddef, "pvefw", $cmd, \@ARGV, undef, $0); + +exit(0); +