X-Git-Url: https://git.proxmox.com/?p=pve-firewall.git;a=blobdiff_plain;f=src%2FPVE%2FFirewall.pm;h=6ac303831a62f630d437ef0e0508decd2b72f5ac;hp=bda5ff94623af8753cea83f41d5e0b395638b782;hb=33efd363ab32d3f8f6a9c49e481cb62a8da40b5d;hpb=7a33215176202a1f4304843cff598b2206619876

diff --git a/src/PVE/Firewall.pm b/src/PVE/Firewall.pm
index bda5ff9..6ac3038 100644
--- a/src/PVE/Firewall.pm
+++ b/src/PVE/Firewall.pm
@@ -12,12 +12,15 @@ use PVE::JSONSchema qw(register_standard_option get_standard_option);
 use PVE::Cluster;
 use PVE::ProcFSTools;
 use PVE::Tools qw($IPV4RE $IPV6RE);
+use PVE::Network;
+use PVE::SafeSyslog;
 use File::Basename;
 use File::Path;
 use IO::File;
 use Net::IP;
 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
 use Encode;
+use Storable qw(dclone);
 
 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
 my $pvefw_conf_dir = "/etc/pve/firewall";
@@ -49,7 +52,15 @@ our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
 
 my $max_alias_name_length = 64;
 my $max_ipset_name_length = 64;
-my $max_group_name_length = 20;
+my $max_group_name_length = 18;
+
+my $PROTOCOLS_WITH_PORTS = {
+    udp => 1,     17 => 1,
+    udplite => 1, 136 => 1,
+    tcp => 1,     6 => 1,
+    dccp => 1,    33 => 1,
+    sctp => 1,    132 => 1,
+};
 
 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
 sub pve_verify_ip_or_cidr {
@@ -132,6 +143,21 @@ my $log_level_hash = {
     emerg => 0,
 };
 
+# %rule
+#
+# name => optional
+# enable => [0|1]
+# action =>
+# proto =>
+# sport => port[,port[,port]].. or port:port
+# dport => port[,port[,port]].. or port:port
+# log => optional, loglevel
+# logmsg => optional, logmsg - overwrites default
+# iface_in => incomin interface
+# iface_out => outgoing interface
+# match => optional, overwrites generation of match
+# target => optional, overwrites action
+
 # we need to overwrite some macros for ipv6
 my $pve_ipv6fw_macros = {
     'Ping' => [
@@ -145,6 +171,7 @@ my $pve_ipv6fw_macros = {
 	{ action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
     ],
     'DHCPv6' => [
+	"DHCPv6 traffic",
 	{ action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
     ],
     'Trcrt' => [
@@ -320,6 +347,10 @@ my $pve_fw_macros = {
 	{ action => 'PARAM', proto => 'tcp', dport => '465' },
 	{ action => 'PARAM', proto => 'tcp', dport => '587' },
     ],
+    'MDNS' => [
+	"Multicast DNS",
+	{ action => 'PARAM', proto => 'udp', dport => '5353' },
+    ],
     'Munin' => [
 	"Munin networked resource monitoring traffic",
 	{ action => 'PARAM', proto => 'tcp', dport => '4949' },
@@ -515,10 +546,14 @@ my $pve_fw_macro_descr;
 my $pve_fw_macro_ipversion = {};
 my $pve_fw_preferred_macro_names = {};
 
+my $FWACCEPTMARK_ON  = "0x80000000/0x80000000";
+my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
+
 my $pve_std_chains = {};
-$pve_std_chains->{4} = {
+my $pve_std_chains_conf = {};
+$pve_std_chains_conf->{4} = {
     'PVEFW-SET-ACCEPT-MARK' => [
-	"-j MARK --set-mark 1",
+	{ target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
     ],
     'PVEFW-DropBroadcast' => [
 	# same as shorewall 'Broadcast'
@@ -534,10 +569,10 @@ $pve_std_chains->{4} = {
 	{ 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",
+	{ match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
+	{ match => '-p udp', target => '-j REJECT --reject-with icmp-port-unreachable' },
+	{ match => '-p icmp', target => '-j REJECT --reject-with icmp-host-unreachable' },
+	{ target => '-j REJECT --reject-with icmp-host-prohibited' },
     ],
     'PVEFW-Drop' => [
 	# same as shorewall 'Drop', which is equal to DROP,
@@ -550,15 +585,15 @@ $pve_std_chains->{4} = {
 	{ 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",
+	{ action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 	# 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 => '135,445' },
+	{ 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 => 'tcp', dport => '135,139,445' },
 	{ 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",
+	{ action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 	# Drop DNS replies
 	{ action => 'DROP', proto => 'udp', sport => 53 },
     ],
@@ -573,119 +608,126 @@ $pve_std_chains->{4} = {
 	{ 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",
+	{ action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 	# Drop Microsoft SMB noise
-	{ action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
+	{ action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
 	{ 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 => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
 	{ 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",
+	{ action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 	# 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",
+	{ match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
+	{ match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
+	{ match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
+	{ match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
+	{ match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-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", # allow DHCP
-	"-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
-	"-s 224.0.0.0/4 -g PVEFW-smurflog",
+	{ match => '-s 0.0.0.0/32', target => '-j RETURN' }, # allow DHCP
+	{ match => '-m addrtype --src-type BROADCAST', target => '-g PVEFW-smurflog' },
+	{ match => '-s 224.0.0.0/4', target => '-g PVEFW-smurflog' },
+    ],
+    'PVEFW-smurflog' => [
+	{ action => 'DROP', logmsg => 'DROP: ' },
+    ],
+    'PVEFW-logflags' => [
+	{ action => 'DROP', logmsg => 'DROP: ' },
     ],
 };
 
-$pve_std_chains->{6} = {
+$pve_std_chains_conf->{6} = {
     'PVEFW-SET-ACCEPT-MARK' => [
-        "-j MARK --set-mark 1",
+	{ target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
     ],
     'PVEFW-DropBroadcast' => [
-        # same as shorewall 'Broadcast'
-        # simply DROP BROADCAST/MULTICAST/ANYCAST
-        # we can use this to reduce logging
-        #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
+	# same as shorewall 'Broadcast'
+	# simply DROP BROADCAST/MULTICAST/ANYCAST
+	# we can use this to reduce logging
+	#{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 	# ipv6 addrtype does not work with kernel 2.6.32
 	#{ action => 'DROP', dsttype => 'MULTICAST' },
-        #{ action => 'DROP', dsttype => 'ANYCAST' },
-        { action => 'DROP', dest => 'ff00::/8' },
-        #{ action => 'DROP', dest => '224.0.0.0/4' },
+	#{ action => 'DROP', dsttype => 'ANYCAST' },
+	{ action => 'DROP', dest => 'ff00::/8' },
+	#{ 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' },
+	# same as shorewall 'reject'
+	#{ action => 'DROP', dsttype => 'BROADCAST' },
+	#{ action => 'DROP', source => '224.0.0.0/4' },
 	{ action => 'DROP', proto => 'icmpv6' },
-        "-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",
+	{ match => '-p tcp', target => '-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
+	# 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 => 'icmpv6', dport => 'destination-unreachable' },
-        { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
-        { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
-
-        # Drop packets with INVALID state
-        "-m conntrack --ctstate INVALID -j DROP",
-        # Drop Microsoft SMB noise
-	{ action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
+	# we are not interested in BROADCAST/MULTICAST/ANYCAST
+	{ action => 'PVEFW-DropBroadcast' },
+	# ACCEPT critical ICMP types
+	{ action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
+	{ action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
+	{ action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
+	# Drop packets with INVALID state
+	{ action => 'DROP', match => '-m conntrack --ctstate INVALID', },
+	# Drop Microsoft SMB noise
+	{ action => 'DROP', proto => 'udp', dport => '135,445' },
 	{ 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 => 'tcp', dport => '135,139,445' },
 	{ 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
+	# Drop new/NotSyn traffic so that it doesn't get logged
+	{ action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
+	# 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 => 'icmpv6', dport => 'destination-unreachable' },
-        { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
-        { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
-
-        # 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 },
+	# 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 => 'icmpv6', dport => 'destination-unreachable' },
+	{ action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
+	{ action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
+	# Drop packets with INVALID state
+	{ action => 'DROP', match => '-m conntrack --ctstate INVALID', },
+	# Drop Microsoft SMB noise
+	{ action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
+	{ 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' },
+	{ action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
+	# Drop new/NotSyn traffic so that it doesn't get logged
+	{ action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
+	# 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",
+	# same as shorewall tcpflags action.
+	# Packets arriving on this interface are checked for som illegal combinations of TCP flags
+	{ match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
+	{ match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
+	{ match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
+	{ match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
+	{ match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
+    ],
+    'PVEFW-logflags' => [
+	{ action => 'DROP', logmsg => 'DROP: ' },
     ],
 };
 
@@ -818,7 +860,7 @@ sub get_etc_services {
 	next if $line =~m/^#/;
 	next if ($line =~m/^\s*$/);
 
-	if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
+	if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp|sctp).*$!) {
 	    $services->{byid}->{$2}->{name} = $1;
 	    $services->{byid}->{$2}->{port} = $2;
 	    $services->{byid}->{$2}->{$3} = 1;
@@ -834,12 +876,8 @@ sub get_etc_services {
     return $etc_services;
 }
 
-my $etc_protocols;
-
-sub get_etc_protocols {
-    return $etc_protocols if $etc_protocols;
-
-    my $filename = "/etc/protocols";
+sub parse_protocol_file {
+    my ($filename) = @_;
 
     my $fh = IO::File->new($filename, O_RDONLY);
     if (!$fh) {
@@ -854,7 +892,7 @@ sub get_etc_protocols {
 	next if $line =~m/^#/;
 	next if ($line =~m/^\s*$/);
 
-	if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
+	if ($line =~ m!^(\S+)\s+(\d+)(?:\s+.*)?$!) {
 	    $protocols->{byid}->{$2}->{name} = $1;
 	    $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 	}
@@ -862,6 +900,16 @@ sub get_etc_protocols {
 
     close($fh);
 
+    return $protocols;
+}
+
+my $etc_protocols;
+
+sub get_etc_protocols {
+    return $etc_protocols if $etc_protocols;
+
+    my $protocols = parse_protocol_file('/etc/protocols');
+
     # add special case for ICMP v6
     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
@@ -871,23 +919,13 @@ sub get_etc_protocols {
     return $etc_protocols;
 }
 
-my $ipv4_mask_hash_localnet = {
-    '255.255.0.0' => 16,
-    '255.255.128.0' => 17,
-    '255.255.192.0' => 18,
-    '255.255.224.0' => 19,
-    '255.255.240.0' => 20,
-    '255.255.248.0' => 21,
-    '255.255.252.0' => 22,
-    '255.255.254.0' => 23,
-    '255.255.255.0' => 24,
-    '255.255.255.128' => 25,
-    '255.255.255.192' => 26,
-    '255.255.255.224' => 27,
-    '255.255.255.240' => 28,
-    '255.255.255.248' => 29,
-    '255.255.255.252' => 30,
-};
+my $etc_ethertypes;
+
+sub get_etc_ethertypes {
+    $etc_ethertypes = parse_protocol_file('/etc/ethertypes')
+	if !$etc_ethertypes;
+    return $etc_ethertypes;
+}
 
 my $__local_network;
 
@@ -912,13 +950,17 @@ sub local_network {
 	    my $mask;
 	    if ($isv6) {
 		$mask = $entry->{prefix};
+		next if !$mask; # skip the default route...
 	    } else {
-		$mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
+		$mask = $PVE::Network::ipv4_mask_hash_localnet->{$entry->{mask}};
 		next if !defined($mask);
 	    }
 	    my $cidr = "$entry->{dest}/$mask";
 	    my $testnet = Net::IP->new($cidr);
-	    if ($testnet->overlaps($testip) == $Net::IP::IP_B_IN_A_OVERLAP) {
+	    my $overlap = $testnet->overlaps($testip);
+	    if ($overlap == $Net::IP::IP_B_IN_A_OVERLAP ||
+	        $overlap == $Net::IP::IP_IDENTICAL)
+	    {
 		$__local_network = $cidr;
 		return;
 	    }
@@ -973,7 +1015,9 @@ sub parse_address_list {
     my $iprange = 0;
     my $ipversion;
 
-    foreach my $elem (split(/,/, $str)) {
+    my @elements = split(/,/, $str);
+    die "extraneous commas in list\n" if $str ne join(',', @elements);
+    foreach my $elem (@elements) {
 	$count++;
 	my $ip = Net::IP->new($elem);
 	if (!$ip) {
@@ -1002,13 +1046,17 @@ sub parse_port_name_number_or_range {
     my $count = 0;
     my $icmp_port = 0;
 
-    foreach my $item (split(/,/, $str)) {
-	$count++;
-	if ($item =~ m/^(\d+):(\d+)$/) {
+    my @elements = split(/,/, $str);
+    die "extraneous commas in list\n" if $str ne join(',', @elements);
+    foreach my $item (@elements) {
+	if ($item =~ m/^([0-9]+):([0-9]+)$/) {
+	    $count += 2;
 	    my ($port1, $port2) = ($1, $2);
 	    die "invalid port '$port1'\n" if $port1 > 65535;
 	    die "invalid port '$port2'\n" if $port2 > 65535;
-	} elsif ($item =~ m/^(\d+)$/) {
+	    die "backwards range '$port1:$port2' not allowed, did you mean '$port2:$port1'?\n" if $port1 > $port2;
+	} elsif ($item =~ m/^([0-9]+)$/) {
+	    $count += 1;
 	    my $port = $1;
 	    die "invalid port '$port'\n" if $port > 65535;
 	} else {
@@ -1022,9 +1070,15 @@ sub parse_port_name_number_or_range {
 	}
     }
 
-    die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
+    die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 0;
 
-    return $count;
+    # I really don't like to use the word number here, but it's the only thing
+    # that makes sense in a literal way. The range 1:100 counts as 2, not as
+    # one and not as 100...
+    die "too many entries in port list (> 15 numbers)\n"
+	if $count > 15;
+
+    return (scalar(@elements) > 1);
 }
 
 PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
@@ -1120,6 +1174,137 @@ sub copy_list_with_digest {
     return wantarray ? ($res, $digest) : $res;
 }
 
+our $cluster_option_properties = {
+    enable => {
+	description => "Enable or disable the firewall cluster wide.",
+	type => 'integer',
+	minimum => 0,
+	optional => 1,
+    },
+    ebtables => {
+	description => "Enable ebtables rules cluster wide.",
+	type => 'boolean',
+	default => 1,
+	optional => 1,
+    },
+    policy_in => {
+	description => "Input policy.",
+	type => 'string',
+	optional => 1,
+	enum => ['ACCEPT', 'REJECT', 'DROP'],
+    },
+    policy_out => {
+	description => "Output policy.",
+	type => 'string',
+	optional => 1,
+	enum => ['ACCEPT', 'REJECT', 'DROP'],
+    },
+};
+
+our $host_option_properties = {
+    enable => {
+	description => "Enable host firewall rules.",
+	type => 'boolean',
+	optional => 1,
+    },
+    log_level_in =>  get_standard_option('pve-fw-loglevel', {
+	description => "Log level for incoming traffic." }),
+    log_level_out =>  get_standard_option('pve-fw-loglevel', {
+	description => "Log level for outgoing traffic." }),
+    tcp_flags_log_level =>  get_standard_option('pve-fw-loglevel', {
+	description => "Log level for illegal tcp flags filter." }),
+    smurf_log_level =>  get_standard_option('pve-fw-loglevel', {
+	description => "Log level for SMURFS filter." }),
+    nosmurfs => {
+	description => "Enable SMURFS filter.",
+	type => 'boolean',
+	optional => 1,
+    },
+    tcpflags => {
+	description => "Filter illegal combinations of TCP flags.",
+	type => 'boolean',
+	optional => 1,
+    },
+    nf_conntrack_max => {
+	description => "Maximum number of tracked connections.",
+	type => 'integer',
+	optional => 1,
+	minimum => 32768,
+    },
+    nf_conntrack_tcp_timeout_established => {
+	description => "Conntrack established timeout.",
+	type => 'integer',
+	optional => 1,
+	minimum => 7875,
+    },
+    ndp => {
+	description => "Enable NDP.",
+	type => 'boolean',
+	optional => 1,
+    },
+    nf_conntrack_allow_invalid => {
+	description => "Allow invalid packets on connection tracking.",
+	type => 'boolean',
+	default => 0,
+	optional => 1,
+    },
+};
+
+our $vm_option_properties = {
+    enable => {
+	description => "Enable/disable firewall rules.",
+	type => 'boolean',
+	optional => 1,
+    },
+    macfilter => {
+	description => "Enable/disable MAC address filter.",
+	type => 'boolean',
+	optional => 1,
+    },
+    dhcp => {
+	description => "Enable DHCP.",
+	type => 'boolean',
+	optional => 1,
+    },
+    ndp => {
+	description => "Enable NDP.",
+	type => 'boolean',
+	optional => 1,
+    },
+    radv => {
+	description => "Allow sending Router Advertisement.",
+	type => 'boolean',
+	optional => 1,
+    },
+    ipfilter => {
+	description => "Enable default IP filters. " .
+	   "This is equivalent to adding an empty ipfilter-net<id> ipset " .
+	   "for every interface. Such ipsets implicitly contain sane default " .
+	   "restrictions such as restricting IPv6 link local addresses to " .
+	   "the one derived from the interface's MAC address. For containers " .
+	   "the configured IP addresses will be implicitly added.",
+	type => 'boolean',
+	optional => 1,
+    },
+    policy_in => {
+	description => "Input policy.",
+	type => 'string',
+	optional => 1,
+	enum => ['ACCEPT', 'REJECT', 'DROP'],
+    },
+    policy_out => {
+	description => "Output policy.",
+	type => 'string',
+	optional => 1,
+	enum => ['ACCEPT', 'REJECT', 'DROP'],
+    },
+    log_level_in =>  get_standard_option('pve-fw-loglevel', {
+	description => "Log level for incoming traffic." }),
+    log_level_out =>  get_standard_option('pve-fw-loglevel', {
+	description => "Log level for outgoing traffic." }),
+
+};
+
 
 my $addr_list_descr = "This can refer to a single IP address, an IP set ('+ipsetname') or an IP alias definition. You can also specify an address range like '20.34.101.207-201.3.9.99', or a list of IP addresses and networks (entries are separated by comma). Please do not mix IPv4 and IPv6 addresses inside such lists.";
 
@@ -1134,6 +1319,7 @@ my $rule_properties = {
     },
     digest => get_standard_option('pve-config-digest'),
     type => {
+	description => "Rule type.",
 	type => 'string',
 	optional => 1,
 	enum => ['in', 'out', 'group'],
@@ -1147,6 +1333,7 @@ my $rule_properties = {
 	minLength => 2,
     },
     macro => {
+	description => "Use predefined standard macro.",
 	type => 'string',
 	optional => 1,
 	maxLength => 128,
@@ -1171,6 +1358,7 @@ my $rule_properties = {
 	optional => 1,
     },
     enable => {
+	description => "Flag to enable/disable a rule.",
         type => 'integer',
 	minimum => 0,
 	optional => 1,
@@ -1186,6 +1374,7 @@ my $rule_properties = {
 	optional => 1,
     },
     comment => {
+	description => "Descriptive comment.",
 	type => 'string',
 	optional => 1,
     },
@@ -1388,15 +1577,22 @@ sub verify_rule {
     if ($rule->{dport}) {
 	eval { parse_port_name_number_or_range($rule->{dport}, 1); };
 	&$add_error('dport', $@) if $@;
+	my $proto = $rule->{proto};
 	&$add_error('proto', "missing property - 'dport' requires this property")
-	    if !$rule->{proto};
+	    if !$proto;
+	&$add_error('dport', "protocol '$proto' does not support ports")
+	    if !$PROTOCOLS_WITH_PORTS->{$proto} &&
+		$proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
     }
 
     if ($rule->{sport}) {
 	eval { parse_port_name_number_or_range($rule->{sport}, 0); };
 	&$add_error('sport', $@) if $@;
+	my $proto = $rule->{proto};
 	&$add_error('proto', "missing property - 'sport' requires this property")
-	    if !$rule->{proto};
+	    if !$proto;
+	&$add_error('sport', "protocol '$proto' does not support ports")
+	    if !$PROTOCOLS_WITH_PORTS->{$proto};
     }
 
     if ($rule->{source}) {
@@ -1510,8 +1706,6 @@ sub enable_bridge_firewall {
     $bridge_firewall_enabled = 1;
 }
 
-my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
-
 sub iptables_restore_cmdlist {
     my ($cmdlist) = @_;
 
@@ -1530,6 +1724,12 @@ sub ipset_restore_cmdlist {
     run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
 }
 
+sub ebtables_restore_cmdlist {
+    my ($cmdlist) = @_;
+
+    run_command("/sbin/ebtables-restore", input => $cmdlist, errmsg => "ebtables_restore_cmdlist");
+}
+
 sub iptables_get_chains {
     my ($iptablescmd) = @_;
 
@@ -1640,144 +1840,184 @@ sub ipset_get_chains {
     return $res;
 }
 
-sub ruleset_generate_cmdstr {
-    my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
+sub ebtables_get_chains {
 
-    return if defined($rule->{enable}) && !$rule->{enable};
-    return if $rule->{errors};
+    my $res = {};
+    my $chains = {};
+    my $parser = sub {
+	my $line = shift;
+	return if $line =~ m/^#/;
+	return if $line =~ m/^\s*$/;
+	if ($line =~ m/^:(\S+)\s\S+$/) {
+	    # Make sure we know chains exist even if they're empty.
+	    $chains->{$1} //= [];
+	} elsif ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
+	    my $chain = $1;
+	    $line =~ s/\s+$//;
+	    push @{$chains->{$chain}}, $line;
+	} else {
+	    # simply ignore the rest
+	    return;
+	}
+    };
 
-    die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
+    run_command("/sbin/ebtables-save", outfunc => $parser);
+    # compute digest for each chain and store rules as well
+    foreach my $chain (keys %$chains) {
+	$res->{$chain}->{rules} = $chains->{$chain};
+	$res->{$chain}->{sig} = iptables_chain_digest($chains->{$chain});
+    }
+    return $res;
+}
 
-    my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}, 1) : 0;
-    my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}, 0) : 0;
+# substitude action of rule according to action hash
+sub rule_substitude_action {
+    my ($rule, $actions) = @_;
 
-    my @cmd = ();
+    if (my $action = $rule->{action}) {
+	$rule->{action} = $actions->{$action} if defined($actions->{$action});
+    }
+}
 
-    push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
-    push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
+# generate a src or dst match
+# $dir(ection) is either d or s
+sub ipt_gen_src_or_dst_match {
+    my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
 
-    my $source = $rule->{source};
-    my $dest = $rule->{dest};
+    my $srcdst;
+    if ($dir eq 's') {
+	$srcdst = "src";
+    } elsif ($dir eq 'd') {
+	$srcdst = "dst";
+    } else {
+	die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
+    }
 
-    if ($source) {
-        if ($source =~ m/^\+/) {
-	    if ($source =~ m/^\+(${ipset_name_pattern})$/) {
-		my $name = $1;
-		if ($fw_conf && $fw_conf->{ipset}->{$name}) {
-		    my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
-		    push @cmd, "-m set --match-set ${ipset_chain} src";
-		} elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
-		    my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
-		    push @cmd, "-m set --match-set ${ipset_chain} src";
-		} else {
-		    die "no such ipset '$name'\n";
-		}
+    my $match;
+    if ($adr =~ m/^\+/) {
+	if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
+	    my $name = $1;
+	    my $ipset_chain;
+	    if ($fw_conf && $fw_conf->{ipset}->{$name}) {
+		$ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
+	    } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
+		$ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
 	    } else {
-		die "invalid security group name '$source'\n";
+		die "no such ipset '$name'\n";
 	    }
-	} elsif ($source =~ m/^${ip_alias_pattern}$/){
-	    my $alias = lc($source);
-	    my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
-	    $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
-	    die "no such alias '$source'\n" if !$e;
-	    push @cmd, "-s $e->{cidr}";
-        } elsif ($source =~ m/\-/){
-	    push @cmd, "-m iprange --src-range $source";
+	    $match = "-m set --match-set ${ipset_chain} ${srcdst}";
 	} else {
-	    push @cmd, "-s $source";
-        }
+	    die "invalid security group name '$adr'\n";
+	}
+    } elsif ($adr =~ m/^${ip_alias_pattern}$/){
+	my $alias = lc($adr);
+	my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
+	$e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
+	die "no such alias '$adr'\n" if !$e;
+	$match = "-${dir} $e->{cidr}";
+    } elsif ($adr =~ m/\-/){
+	$match = "-m iprange --${srcdst}-range $adr";
+    } else {
+	$match = "-${dir} $adr";
     }
 
-    if ($dest) {
-        if ($dest =~ m/^\+/) {
-	    if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
-		my $name = $1;
-		if ($fw_conf && $fw_conf->{ipset}->{$name}) {
-		    my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
-		    push @cmd, "-m set --match-set ${ipset_chain} dst";
-		} elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
-		    my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
-		    push @cmd, "-m set --match-set ${ipset_chain} dst";
+    return $match;
+}
+
+# convert a %rule to an array of iptables commands
+sub ipt_rule_to_cmds {
+    my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
+
+    die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
+
+    my @match = ();
+
+    if (defined $rule->{match}) {
+	push @match, $rule->{match};
+    } else {
+	push @match, "-i $rule->{iface_in}" if $rule->{iface_in};
+	push @match, "-o $rule->{iface_out}" if $rule->{iface_out};
+
+	if ($rule->{source}) {
+	    push @match, ipt_gen_src_or_dst_match($rule->{source}, 's', $ipversion, $cluster_conf, $fw_conf);
+	}
+	if ($rule->{dest}) {
+	    push @match, ipt_gen_src_or_dst_match($rule->{dest}, 'd', $ipversion, $cluster_conf, $fw_conf);
+	}
+
+	if (my $proto = $rule->{proto}) {
+	    push @match, "-p $proto";
+
+	    my $multidport = defined($rule->{dport}) && parse_port_name_number_or_range($rule->{dport}, 1);
+	    my $multisport = defined($rule->{sport}) && parse_port_name_number_or_range($rule->{sport}, 0);
+
+	    my $add_dport = sub {
+		return if !$rule->{dport};
+
+		if ($proto eq 'icmp') {
+		    # Note: we use dport to store --icmp-type
+		    die "unknown icmp-type '$rule->{dport}'\n"
+			if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
+		    push @match, "-m icmp --icmp-type $rule->{dport}";
+		} elsif ($proto eq 'icmpv6') {
+		    # Note: we use dport to store --icmpv6-type
+		    die "unknown icmpv6-type '$rule->{dport}'\n"
+			if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
+		    push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
+		} elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
+		    die "protocol $proto does not have ports\n";
+		} elsif ($multidport) {
+		    push @match, "--match multiport", "--dports $rule->{dport}";
 		} else {
-		    die "no such ipset '$name'\n";
+		    push @match, "--dport $rule->{dport}";
 		}
-	    } else {
-		die "invalid security group name '$dest'\n";
-	    }
-	} elsif ($dest =~ m/^${ip_alias_pattern}$/){
-	    my $alias = lc($dest);
-	    my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
-	    $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
-	    die "no such alias '$dest'\n" if !$e;
-	    push @cmd, "-d $e->{cidr}";
-        } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
-	    push @cmd, "-m iprange --dst-range $dest";
-	} else {
-	    push @cmd, "-d $dest";
-        }
-    }
+	    };
 
-    if ($rule->{proto}) {
-	push @cmd, "-p $rule->{proto}";
-
-	my $multiport = 0;
-	$multiport++ if $nbdport > 1;
-	$multiport++ if $nbsport > 1;
-
-	push @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 $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
-		push @cmd, "-m icmp --icmp-type $rule->{dport}";
-	    } elsif ($rule->{proto} && $rule->{proto} eq 'icmpv6') {
-		# Note: we use dport to store --icmpv6-type
-		die "unknown icmpv6-type '$rule->{dport}'\n"
-		    if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
-		push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
-	    } else {
-		if ($nbdport > 1) {
-		    if ($multiport == 2) {
-			push @cmd,  "--ports $rule->{dport}";
-		    } else {
-			push @cmd, "--dports $rule->{dport}";
-		    }
+	    my $add_sport = sub {
+		return if !$rule->{sport};
+
+		die "protocol $proto does not have ports\n"
+		    if !$PROTOCOLS_WITH_PORTS->{$proto};
+		if ($multisport) {
+		    push @match, "--match multiport", "--sports $rule->{sport}";
 		} else {
-		    push @cmd, "--dport $rule->{dport}";
+		    push @match, "--sport $rule->{sport}";
 		}
-	    }
-	}
+	    };
 
-	if ($rule->{sport}) {
-	    if ($nbsport > 1) {
-		push @cmd, "--sports $rule->{sport}" if $multiport != 2;
-	    } else {
-		push @cmd, "--sport $rule->{sport}";
-	    }
+	    # order matters - single port before multiport!
+	    $add_dport->() if $multisport;
+	    $add_sport->();
+	    $add_dport->() if !$multisport;
+	} elsif ($rule->{dport} || $rule->{sport}) {
+	    die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
+	    die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
 	}
-    } elsif ($rule->{dport} || $rule->{sport}) {
-	die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
-	die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
-    }
 
-    push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
+	push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
+    }
+    my $matchstr = scalar(@match) ? join(' ', @match) : "";
 
-    if (my $action = $rule->{action}) {
-	$action = $actions->{$action} if defined($actions->{$action});
-	$goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
-	push @cmd, $goto ? "-g $action" : "-j $action";
+    my $targetstr;
+    if (defined $rule->{target}) {
+	$targetstr = $rule->{target};
+    } else {
+	my $action = (defined $rule->{action}) ? $rule->{action} : "";
+	my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
+	$targetstr = ($goto) ? "-g $action" : "-j $action";
     }
 
-    return scalar(@cmd) ? join(' ', @cmd) : undef;
+    my @iptcmds;
+    if (defined $rule->{log} && $rule->{log}) {
+	my $logaction = get_log_rule_base($chain, $vmid, $rule->{logmsg}, $rule->{log});
+	push @iptcmds, "-A $chain $matchstr $logaction";
+    }
+    push @iptcmds, "-A $chain $matchstr $targetstr";
+    return @iptcmds;
 }
 
 sub ruleset_generate_rule {
-    my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
+    my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf) = @_;
 
     my $rules;
 
@@ -1788,26 +2028,12 @@ sub ruleset_generate_rule {
     }
 
     # update all or nothing
-
-    my @cmds = ();
-    foreach my $tmp (@$rules) {
-	if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
-	    push @cmds, $cmdstr;
-	}
+    my @ipt_rule_cmds;
+    foreach my $r (@$rules) {
+	push @ipt_rule_cmds, ipt_rule_to_cmds($r, $chain, $ipversion, $cluster_conf, $fw_conf);
     }
-
-    foreach my $cmdstr (@cmds) {
-	ruleset_addrule($ruleset, $chain, $cmdstr);
-    }
-}
-
-sub ruleset_generate_rule_insert {
-    my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
-
-    die "implement me" if $rule->{macro}; # not implemented, because not needed so far
-
-    if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $rule, $actions, $goto)) {
-	ruleset_insertrule($ruleset, $chain, $cmdstr);
+    foreach my $c (@ipt_rule_cmds) {
+	ruleset_add_ipt_cmd($ruleset, $chain, $c);
     }
 }
 
@@ -1828,68 +2054,67 @@ sub ruleset_chain_exist {
     return $ruleset->{$chain} ? 1 : undef;
 }
 
+# add an iptables command (like generated by ipt_rule_to_cmds) to a chain
+sub ruleset_add_ipt_cmd {
+   my ($ruleset, $chain, $iptcmd) = @_;
+
+   die "no such chain '$chain'\n" if !$ruleset->{$chain};
+
+   push @{$ruleset->{$chain}}, $iptcmd;
+}
+
 sub ruleset_addrule {
-   my ($ruleset, $chain, $rule) = @_;
+   my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
 
    die "no such chain '$chain'\n" if !$ruleset->{$chain};
 
-   push @{$ruleset->{$chain}}, "-A $chain $rule";
+   if (defined($log) && $log) {
+	my $logaction = get_log_rule_base($chain, $vmid, $logmsg, $log);
+	push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
+   }
+   # for stable ebtables digests avoid double-spaces to match ebtables-save output
+   $match .= ' ' if length($match);
+   push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
 }
 
 sub ruleset_insertrule {
-   my ($ruleset, $chain, $rule) = @_;
+   my ($ruleset, $chain, $match, $action, $log) = @_;
 
    die "no such chain '$chain'\n" if !$ruleset->{$chain};
 
-   unshift @{$ruleset->{$chain}}, "-A $chain $rule";
+   unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
 }
 
 sub get_log_rule_base {
     my ($chain, $vmid, $msg, $loglevel) = @_;
 
-    die "internal error - no log level" if !defined($loglevel);
-
     $vmid = 0 if !defined($vmid);
+    $msg = "" if !defined($msg);
 
     # Note: we use special format for prefix to pass further
-    # info to log daemon (VMID, LOGVELEL and CHAIN)
+    # info to log daemon (VMID, LOGLEVEL and CHAIN)
 
     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
 }
 
-sub ruleset_addlog {
-    my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
-
-    return if !defined($loglevel);
-
-    my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
-
-    $logrule = "$rule $logrule" if defined($rule);
-
-    ruleset_addrule($ruleset, $chain, $logrule);
-}
-
 sub ruleset_add_chain_policy {
     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
 
     if ($policy eq 'ACCEPT') {
 
-	ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
-			      { ACCEPT =>  $accept_action});
+	my $rule = { action => 'ACCEPT' };
+	rule_substitude_action($rule, { ACCEPT =>  $accept_action});
+	ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
 
     } elsif ($policy eq 'DROP') {
 
-	ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
+	ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop");
 
-	ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
-
-	ruleset_addrule($ruleset, $chain, "-j DROP");
+	ruleset_addrule($ruleset, $chain, "", "-j DROP", $loglevel, "policy $policy: ", $vmid);
     } elsif ($policy eq 'REJECT') {
-	ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
-
-	ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
+	ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject");
 
-	ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
+	ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject", $loglevel, "policy $policy: ", $vmid);
     } else {
 	# should not happen
 	die "internal error: unknown policy '$policy'";
@@ -1900,19 +2125,21 @@ sub ruleset_chain_add_ndp {
     my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
 
-    ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation $accept");
+    ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation", $accept);
     if ($direction ne 'OUT' || $options->{radv}) {
-	ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement $accept");
+	ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", $accept);
     }
-    ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation $accept");
-    ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement $accept");
+    ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation", $accept);
+    ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement", $accept);
 }
 
 sub ruleset_chain_add_conn_filters {
-    my ($ruleset, $chain, $accept) = @_;
+    my ($ruleset, $chain, $allow_invalid, $accept) = @_;
 
-    ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
-    ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
+    if (!$allow_invalid) {
+	ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID", "-j DROP");
+    }
+    ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED", "-j $accept");
 }
 
 sub ruleset_chain_add_input_filters {
@@ -1921,21 +2148,20 @@ sub ruleset_chain_add_input_filters {
     if ($cluster_conf->{ipset}->{blacklist}){
 	if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
 	    ruleset_create_chain($ruleset, "PVEFW-blacklist");
-	    ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
-	    ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
+	    ruleset_addrule($ruleset, "PVEFW-blacklist", "", "-j DROP", $loglevel, "DROP: ");
 	}
 	my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
-	ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
+	ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src", "-j PVEFW-blacklist");
     }
 
     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
 	if ($ipversion == 4) {
-	    ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
+	    ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW", "-j PVEFW-smurfs");
 	}
     }
 
     if ($options->{tcpflags}) {
-	ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
+	ruleset_addrule($ruleset, $chain, "-p tcp", "-j PVEFW-tcpflags");
     }
 }
 
@@ -1972,15 +2198,15 @@ sub ruleset_create_vm_chain {
 
     if ($direction eq 'OUT') {
 	if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
-	    ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
+	    ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr", "-j DROP");
 	}
 	if ($ipversion == 6 && !$options->{radv}) {
-	    ruleset_addrule($ruleset, $chain, '-p icmpv6 --icmpv6-type router-advertisement -j DROP');
+	    ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", "-j DROP");
 	}
 	if ($ipfilter_ipset) {
-	    ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
+	    ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src", "-j DROP");
 	}
-	ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
+	ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
     }
 
     my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
@@ -1997,14 +2223,14 @@ sub ruleset_add_group_rule {
     }
 
     if ($direction eq 'OUT' && $rule->{iface_out}) {
-	ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
+	ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out}", "-j $group_chain");
     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
-	ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
+	ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in}", "-j $group_chain");
     } else {
-	ruleset_addrule($ruleset, $chain, "-j $group_chain");
+	ruleset_addrule($ruleset, $chain, "", "-j $group_chain");
     }
 
-    ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
+    ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON", "-j $action");
 }
 
 sub ruleset_generate_vm_rules {
@@ -2026,13 +2252,11 @@ sub ruleset_generate_vm_rules {
 	    next if $rule->{type} ne $lc_direction;
 	    eval {
 		if ($direction eq 'OUT') {
-		    ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
-					  { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
-					  undef, $cluster_conf, $vmfw_conf);
+		    rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
+		    ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf);
 		} else {
-		    ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
-					  { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
-					  undef, $cluster_conf, $vmfw_conf);
+		    rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject" });
+		    ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf);
 		}
 	    };
 	    warn $@ if $@;
@@ -2069,7 +2293,7 @@ sub ruleset_generate_vm_ipsrules {
 	    ruleset_create_chain($ruleset, "PVEFW-IPS");
 	}
 
-        ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
+        ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged", "-j $nfqueue");
     }
 }
 
@@ -2103,7 +2327,7 @@ sub generate_tap_rules_direction {
 	if ($direction eq 'OUT') {
 	    $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
 	} else {
-	$policy = $options->{policy_in} || 'DROP'; # allow nothing by default
+	    $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
 	}
 
 	my $accept = generate_nfqueue($options);
@@ -2117,10 +2341,10 @@ sub generate_tap_rules_direction {
     # plug the tap chain to bridge chain
     if ($direction eq 'IN') {
 	ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
-			"-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
+			"-m physdev --physdev-is-bridged --physdev-out $iface", "-j $tapchain");
     } else {
 	ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
-			"-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
+			"-m physdev --physdev-is-bridged --physdev-in $iface", "-j $tapchain");
     }
 }
 
@@ -2138,16 +2362,16 @@ sub enable_host_firewall {
 
     my $loglevel = get_option_log_level($options, "log_level_in");
 
-    ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
+    ruleset_addrule($ruleset, $chain, "-i lo", "-j ACCEPT");
 
-    ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
+    ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
 
     # we use RETURN because we need to check also tap rules
     my $accept_action = 'RETURN';
 
-    ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
+    ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
 
     # add host rules first, so that cluster wide rules can be overwritten
     foreach my $rule (@$rules, @$cluster_rules) {
@@ -2160,9 +2384,8 @@ sub enable_host_firewall {
 	    if ($rule->{type} eq 'group') {
 		ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
 	    } elsif ($rule->{type} eq 'in') {
-		ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, 
-				      { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
-				      undef, $cluster_conf, $hostfw_conf);
+		rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
+		ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf);
 	    }
 	};
 	warn $@ if $@;
@@ -2172,19 +2395,19 @@ sub enable_host_firewall {
     # allow standard traffic for management ipset (includes cluster network)
     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
-    ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
-    ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
-    ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
-    ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
+    ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006", "-j $accept_action");  # PVE API
+    ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
+    ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
+    ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22", "-j $accept_action");  # SSH
 
     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
 
     # corosync
     if ($localnet && ($ipversion == $localnet_ver)) {
-	my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
-	ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
-	ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
+	my $corosync_rule = "-p udp --dport 5404:5405";
+	ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule", "-j $accept_action");
+	ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
     }
 
     # implement input policy
@@ -2197,15 +2420,15 @@ sub enable_host_firewall {
 
     $loglevel = get_option_log_level($options, "log_level_out");
 
-    ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
+    ruleset_addrule($ruleset, $chain, "-o lo", "-j ACCEPT");
 
-    ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
+    ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
 
     # we use RETURN because we may want to check other thigs later
     $accept_action = 'RETURN';
     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
 
-    ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
+    ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
 
     # add host rules first, so that cluster wide rules can be overwritten
     foreach my $rule (@$rules, @$cluster_rules) {
@@ -2217,9 +2440,8 @@ sub enable_host_firewall {
 	    if ($rule->{type} eq 'group') {
 		ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
 	    } elsif ($rule->{type} eq 'out') {
-		ruleset_generate_rule($ruleset, $chain, $ipversion, 
-				      $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
-				      undef, $cluster_conf, $hostfw_conf);
+		rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
+		ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf);
 	    }
 	};
 	warn $@ if $@;
@@ -2228,22 +2450,22 @@ sub enable_host_firewall {
 
     # allow standard traffic on cluster network
     if ($localnet && ($ipversion == $localnet_ver)) {
-	ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
-	ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
-	ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
-	ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
-
-	my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
-	ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
-	ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
+	ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006", "-j $accept_action");  # PVE API
+	ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22", "-j $accept_action");  # SSH
+	ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
+	ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
+
+	my $corosync_rule = "-p udp --dport 5404:5405";
+	ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule", "-j $accept_action");
+	ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
     }
 
     # implement output policy
     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
 
-    ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
-    ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
+    ruleset_addrule($ruleset, "PVEFW-OUTPUT", "", "-j PVEFW-HOST-OUT");
+    ruleset_addrule($ruleset, "PVEFW-INPUT", "", "-j PVEFW-HOST-IN");
 }
 
 sub generate_group_rules {
@@ -2259,29 +2481,29 @@ sub generate_group_rules {
     my $chain = "GROUP-${group}-IN";
 
     ruleset_create_chain($ruleset, $chain);
-    ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
+    ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
 
     foreach my $rule (@$rules) {
 	next if $rule->{type} ne 'in';
+	next if !$rule->{enable} || $rule->{errors};
 	next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
-	ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, 
-			      { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, 
-			      undef, $cluster_conf);
+	rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
+	ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
     }
 
     $chain = "GROUP-${group}-OUT";
 
     ruleset_create_chain($ruleset, $chain);
-    ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
+    ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
 
     foreach my $rule (@$rules) {
 	next if $rule->{type} ne 'out';
+	next if !$rule->{enable} || $rule->{errors};
 	next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
 	# we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
 	# check also other tap rules later
-	ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
-			      { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, 
-			      undef, $cluster_conf);
+	rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
+	ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
     }
 }
 
@@ -2291,6 +2513,14 @@ for (my $i = 0; $i < $MAX_NETS; $i++)  {
     $valid_netdev_names->{"net$i"} = 1;
 }
 
+sub get_mark_values {
+    my ($value, $mask) = @_;
+    $value = hex($value) if $value =~ /^0x/;
+    $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
+    $mask = 0xffffffff if !defined($mask);
+    return ($value, $mask);
+}
+
 sub parse_fw_rule {
     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
 
@@ -2357,16 +2587,28 @@ sub parse_fw_rule {
     die "unable to parse rule parameters: $line\n" if length($line);
 
     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
-    if ($verbose && $rule->{errors}) {
-	warn "$prefix - errors in rule parameters: $orig_line\n";
+    if ($rule->{errors}) {
+	# The verbose flag really means we're running from the CLI and want
+	# output on the console - in the other case we really want such errors
+	# to go into the syslog instead.
+	my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
+	$log->("$prefix - errors in rule parameters: $orig_line\n");
 	foreach my $p (keys %{$rule->{errors}}) {
-	    warn "  $p: $rule->{errors}->{$p}\n";
+	    $log->("  $p: $rule->{errors}->{$p}\n");
 	}
     }
 
     return $rule;
 }
 
+sub verify_ethertype {
+    my ($value) = @_;
+    my $types = get_etc_ethertypes();
+    die "unknown ethernet protocol type: $value\n"
+	if !defined($types->{byname}->{$value}) &&
+	   !defined($types->{byid}->{$value});
+}
+
 sub parse_vmfw_option {
     my ($line) = @_;
 
@@ -2386,6 +2628,10 @@ sub parse_vmfw_option {
     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
 	$opt = lc($1);
 	$value = $2;
+    } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
+	$opt = lc($1);
+	$value = $2;
+	verify_ethertype($_) foreach split(/\s*,\s*/, $value);
     } else {
 	die "can't parse option '$line'\n"
     }
@@ -2400,7 +2646,7 @@ sub parse_hostfw_option {
 
     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
 
-    if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
+    if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid):\s*(0|1)\s*$/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) {
@@ -2427,6 +2673,9 @@ sub parse_clusterfw_option {
 	if (($value > 1) && ((time() - $value) > 60)) {
 	    $value = 0
 	}
+    } elsif ($line =~ m/^(ebtables):\s*(0|1)\s*$/i) {
+	$opt = lc($1);
+	$value = int($2);
     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
 	$opt = lc($1);
 	$value = uc($3);
@@ -2628,6 +2877,10 @@ sub generic_fw_config_parser {
 		$errors->{cidr} = $err;
 	    }
 
+	    if ($cidr =~ m!/0+$!) {
+		$errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
+	    }
+
 	    my $entry = { cidr => $cidr };
 	    $entry->{nomatch} = 1 if $nomatch;
 	    $entry->{comment} = $comment if $comment;
@@ -2952,26 +3205,21 @@ sub generate_std_chains {
     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
 
     my $loglevel = get_option_log_level($options, 'smurf_log_level');
-
-    my $chain;
-
-    if ($ipversion == 4) {
-	# same as shorewall smurflog.
-	$chain = 'PVEFW-smurflog';
-	$std_chains->{$chain} = [];
-	
-	push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
-	push @{$std_chains->{$chain}}, "-j DROP";
+    my $chain = 'PVEFW-smurflog';
+    if ( $std_chains->{$chain} ) {
+	foreach my $r (@{$std_chains->{$chain}}) {
+	  $r->{log} = $loglevel;
+	}
     }
 
     # same as shorewall logflags action.
     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
     $chain = 'PVEFW-logflags';
-    $std_chains->{$chain} = [];
-
-    # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
-    push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
-    push @{$std_chains->{$chain}}, "-j DROP";
+    if ( $std_chains->{$chain} ) {
+	foreach my $r (@{$std_chains->{$chain}}) {
+	  $r->{log} = $loglevel;
+	}
+    }
 
     foreach my $chain (keys %$std_chains) {
 	ruleset_create_chain($ruleset, $chain);
@@ -2979,7 +3227,7 @@ sub generate_std_chains {
 	    if (ref($rule)) {
 		ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
 	    } else {
-		ruleset_addrule($ruleset, $chain, $rule);
+		die "rule $rule as string - should not happen";
 	    }
 	}
     }
@@ -3162,6 +3410,9 @@ sub compile {
 
     my $vmfw_configs;
 
+    # fixme: once we read standard chains from config this needs to be put in test/standard cases below
+    $pve_std_chains = dclone($pve_std_chains_conf);
+
     if ($vmdata) { # test mode
 	my $testdir = $vmdata->{testdir} || die "no test directory specified";
 	my $filename = "$testdir/cluster.fw";
@@ -3180,7 +3431,7 @@ sub compile {
 	$vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
     }
 
-    return ({},{},{}) if !$cluster_conf->{options}->{enable};
+    return ({},{},{},{}) if !$cluster_conf->{options}->{enable};
 
     my $localnet;
     if ($cluster_conf->{aliases}->{local_network}) {
@@ -3189,7 +3440,7 @@ sub compile {
 	my $localnet_ver;
 	($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
 
-	$cluster_conf->{aliases}->{local_network} = { 
+	$cluster_conf->{aliases}->{local_network} = {
 	    name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
     }
 
@@ -3197,9 +3448,10 @@ sub compile {
 
     my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
     my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
+    my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $verbose);
     my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
 
-    return ($ruleset, $ipset_ruleset, $rulesetv6);
+    return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
 }
 
 sub compile_iptables_filter {
@@ -3217,15 +3469,16 @@ sub compile_iptables_filter {
     # fixme: what log level should we use here?
     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
 
-    ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
+    my $conn_allow_invalid = $hostfw_options->{nf_conntrack_allow_invalid} // 0;
+    ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", $conn_allow_invalid, "ACCEPT");
 
     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
 
-    ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
+    ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
 
     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
-    ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
+    ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
 
     generate_std_chains($ruleset, $hostfw_options, $ipversion);
 
@@ -3237,13 +3490,13 @@ sub compile_iptables_filter {
     }
 
     # generate firewall rules for QEMU VMs
-    foreach my $vmid (keys %{$vmdata->{qemu}}) {
+    foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
 	eval {
 	    my $conf = $vmdata->{qemu}->{$vmid};
 	    my $vmfw_conf = $vmfw_configs->{$vmid};
 	    return if !$vmfw_conf;
 
-	    foreach my $netid (keys %$conf) {
+	    foreach my $netid (sort keys %$conf) {
 		next if $netid !~ m/^net(\d+)$/;
 		my $net = PVE::QemuServer::parse_net($conf->{$netid});
 		next if !$net->{firewall};
@@ -3260,14 +3513,14 @@ sub compile_iptables_filter {
     }
 
     # generate firewall rules for LXC containers
-    foreach my $vmid (keys %{$vmdata->{lxc}}) {
+    foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
         eval {
             my $conf = $vmdata->{lxc}->{$vmid};
             my $vmfw_conf = $vmfw_configs->{$vmid};
             return if !$vmfw_conf;
 
             if ($vmfw_conf->{options}->{enable}) {
-		foreach my $netid (keys %$conf) {
+		foreach my $netid (sort keys %$conf) {
                     next if $netid !~ m/^net(\d+)$/;
                     my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
                     next if !$net->{firewall};
@@ -3284,7 +3537,7 @@ sub compile_iptables_filter {
     }
 
     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
-	ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
+	ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
     }
 
     return $ruleset;
@@ -3392,10 +3645,10 @@ sub compile_ipsets {
 		    { cidr => $linklocal },
 		    { cidr => 'fe80::/10', nomatch => 1 }
 		];
-		if ($net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
+		if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
 		    push @$set, { cidr => $1 };
 		}
-		if ($net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
+		if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
 		    push @$set, { cidr => $1 };
 		}
 	    }
@@ -3411,17 +3664,148 @@ sub compile_ipsets {
     return $ipset_ruleset;
 }
 
+sub compile_ebtables_filter {
+    my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $verbose) = @_;
+
+    if (!($cluster_conf->{options}->{ebtables} // 1)) {
+	return {};
+    }
+
+    my $ruleset = {};
+
+    ruleset_create_chain($ruleset, "PVEFW-FORWARD");
+
+    ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
+    #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED', to speedup rules
+    ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv4', '-j ACCEPT');
+    ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv6', '-j ACCEPT');
+    ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-o fwln+', '-j PVEFW-FWBR-OUT');
+
+    # generate firewall rules for QEMU VMs
+    foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
+	eval {
+	    my $conf = $vmdata->{qemu}->{$vmid};
+	    my $vmfw_conf = $vmfw_configs->{$vmid};
+	    return if !$vmfw_conf;
+	    my $ipsets = $vmfw_conf->{ipset};
+
+	    foreach my $netid (sort keys %$conf) {
+		next if $netid !~ m/^net(\d+)$/;
+		my $net = PVE::QemuServer::parse_net($conf->{$netid});
+		next if !$net->{firewall};
+		my $iface = "tap${vmid}i$1";
+		my $macaddr = $net->{macaddr};
+		my $arpfilter = [];
+		if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
+		    foreach my $ipaddr (@$ipset) {
+			my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
+			next if !$ip || ($version && $version != 4);
+			push(@$arpfilter, $ip);
+		    }
+		}
+		generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
+	    }
+	};
+	warn $@ if $@; # just to be sure - should not happen
+    }
+
+    # generate firewall rules for LXC containers
+    foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
+	eval {
+	    my $conf = $vmdata->{lxc}->{$vmid};
+
+	    my $vmfw_conf = $vmfw_configs->{$vmid};
+	    return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
+	    my $ipsets = $vmfw_conf->{ipset};
+
+	    foreach my $netid (sort keys %$conf) {
+		next if $netid !~ m/^net(\d+)$/;
+		my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
+		next if !$net->{firewall};
+		my $iface = "veth${vmid}i$1";
+		my $macaddr = $net->{hwaddr};
+		my $arpfilter = [];
+		if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
+		    foreach my $ipaddr (@$ipset) {
+			my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
+			next if !$ip || ($version && $version != 4);
+			push(@$arpfilter, $ip);
+		    }
+		}
+		push(@$arpfilter, $net->{ip}) if $net->{ip} && $vmfw_conf->{options}->{ipfilter};
+		generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
+	    }
+	};
+	warn $@ if $@; # just to be sure - should not happen
+    }
+
+    return $ruleset;
+}
+
+sub generate_tap_layer2filter {
+    my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter) = @_;
+    my $options = $vmfw_conf->{options};
+
+    my $tapchain = $iface."-OUT";
+
+    # ebtables remove zeros from mac pairs
+    $macaddr =~ s/0([0-9a-f])/$1/ig;
+    $macaddr = lc($macaddr);
+
+    ruleset_create_chain($ruleset, $tapchain);
+
+    if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
+	    ruleset_addrule($ruleset, $tapchain, "-s ! $macaddr", '-j DROP');
+    }
+
+    if (@$arpfilter){
+	my $arpchain = $tapchain."-ARP";
+	ruleset_addrule($ruleset, $tapchain, "-p ARP", "-j $arpchain");
+	ruleset_create_chain($ruleset, $arpchain);
+
+	foreach my $ip (@{$arpfilter}) {
+	    ruleset_addrule($ruleset, $arpchain, "-p ARP --arp-ip-src $ip", '-j RETURN');
+	}
+	ruleset_addrule($ruleset, $arpchain, '', '-j DROP');
+    }
+
+    if (defined($options->{layer2_protocols})){
+	my $protochain = $tapchain."-PROTO";
+	ruleset_addrule($ruleset, $tapchain, '', "-j $protochain");
+	ruleset_create_chain($ruleset, $protochain);
+
+	foreach my $proto (split(/,/, $options->{layer2_protocols})) {
+	    ruleset_addrule($ruleset, $protochain, "-p $proto", '-j RETURN');
+	}
+	ruleset_addrule($ruleset, $protochain, '', '-j DROP');
+    }
+
+    ruleset_addrule($ruleset, $tapchain, '', '-j ACCEPT');
+
+    ruleset_addrule($ruleset, 'PVEFW-FWBR-OUT', "-i $iface", "-j $tapchain");
+}
+
+# the parameter $change_only_regex changes two things if defined:
+# * all chains not matching it will be left intact
+# * both the $active_chains hash and the returned status_hash have different
+#   structure (they contain a key named 'rules').
 sub get_ruleset_status {
-    my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
+    my ($ruleset, $active_chains, $digest_fn, $verbose, $change_only_regex) = @_;
 
     my $statushash = {};
 
     foreach my $chain (sort keys %$ruleset) {
-	my $sig = &$digest_fn($ruleset->{$chain});
+	my $rules = $ruleset->{$chain};
+	my $sig = &$digest_fn($rules);
+	my $oldsig;
 
 	$statushash->{$chain}->{sig} = $sig;
-
-	my $oldsig = $active_chains->{$chain};
+	if (defined($change_only_regex)) {
+	    $oldsig = $active_chains->{$chain}->{sig};
+	    $statushash->{$chain}->{rules} = $rules;
+	} else {
+	    $oldsig = $active_chains->{$chain};
+	}
 	if (!defined($oldsig)) {
 	    $statushash->{$chain}->{action} = 'create';
 	} else {
@@ -3431,19 +3815,26 @@ sub get_ruleset_status {
 		$statushash->{$chain}->{action} = 'update';
 	    }
 	}
-	print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
-	foreach my $cmd (@{$ruleset->{$chain}}) {
-	    print "\t$cmd\n" if $verbose;
+	if ($verbose) {
+	    print "$statushash->{$chain}->{action} $chain ($sig)\n";
+	    foreach my $cmd (@{$rules}) {
+		print "\t$cmd\n";
+	    }
 	}
     }
 
     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 $verbose;
+	next if defined($ruleset->{$chain});
+	my $action = 'delete';
+	my $sig = $active_chains->{$chain};
+	if (defined($change_only_regex)) {
+	    $action = 'ignore' if ($chain !~ m/$change_only_regex/);
+	    $statushash->{$chain}->{rules} = $active_chains->{$chain}->{rules};
+	    $sig = $sig->{sig};
 	}
+	$statushash->{$chain}->{action} = $action;
+	$statushash->{$chain}->{sig} = $sig;
+	print "$action $chain ($sig)\n" if $verbose;
     }
 
     return $statushash;
@@ -3518,6 +3909,46 @@ sub get_ruleset_cmdlist {
     return wantarray ? ($cmdlist, $changes) : $cmdlist;
 }
 
+my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tap|veth)\d+i\d+-(?:IN|OUT)/;
+
+sub get_ebtables_cmdlist {
+    my ($ruleset, $verbose) = @_;
+
+    my $changes = 0;
+    my $cmdlist = "*filter\n";
+
+    my $active_chains = ebtables_get_chains();
+    my $statushash = get_ruleset_status($ruleset, $active_chains,
+					\&iptables_chain_digest, $verbose,
+					$pve_ebtables_chainname_regex);
+
+    # create chains first and make sure PVE rules are evaluated if active
+    my $append_pve_to_forward = '-A FORWARD -j PVEFW-FORWARD';
+    my $pve_include = 0;
+    foreach my $chain (sort keys %$statushash) {
+	next if ($statushash->{$chain}->{action} eq 'delete');
+	$cmdlist .= ":$chain ACCEPT\n";
+	$pve_include = 1 if ($chain eq 'PVEFW-FORWARD');
+    }
+
+    foreach my $chain (sort keys %$statushash) {
+	my $stat = $statushash->{$chain};
+	next if ($stat->{action} eq 'delete');
+	$changes = 1 if ($stat->{action} !~ 'ignore|exists');
+
+	foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
+	    if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
+		next if ! $pve_include;
+		$pve_include = 0;
+	    }
+	    $cmdlist .= "$cmd\n";
+	}
+    }
+    $cmdlist .= "$append_pve_to_forward\n" if $pve_include;
+
+    return wantarray ? ($cmdlist, $changes) : $cmdlist;
+}
+
 sub get_ipset_cmdlist {
     my ($ruleset, $verbose) = @_;
 
@@ -3577,7 +4008,7 @@ sub get_ipset_cmdlist {
 }
 
 sub apply_ruleset {
-    my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
+    my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset, $verbose) = @_;
 
     enable_bridge_firewall();
 
@@ -3586,6 +4017,7 @@ sub apply_ruleset {
 
     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
+    my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist($ebtables_ruleset, $verbose);
 
     if ($verbose) {
 	if ($ipset_changes) {
@@ -3603,6 +4035,11 @@ sub apply_ruleset {
 	    print "ip6tables changes:\n";
 	    print $cmdlistv6;
 	}
+
+	if ($ebtables_changes) {
+	    print "ebtables changes:\n";
+	    print $ebtables_cmdlist;
+	}
     }
 
     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
@@ -3625,6 +4062,11 @@ sub apply_ruleset {
 
     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
 
+    ebtables_restore_cmdlist($ebtables_cmdlist);
+
+    $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
+    PVE::Tools::file_set_contents($tmpfile, $ebtables_cmdlist || '');
+
     # test: re-read status and check if everything is up to date
     my $active_chains = iptables_get_chains();
     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
@@ -3649,12 +4091,26 @@ sub apply_ruleset {
 	}
     }
 
+    my $active_ebtables_chains = ebtables_get_chains();
+    my $ebtables_statushash = get_ruleset_status($ebtables_ruleset,
+				$active_ebtables_chains, \&iptables_chain_digest,
+				0, $pve_ebtables_chainname_regex);
+
+    foreach my $chain (sort keys %$ebtables_ruleset) {
+	my $stat = $ebtables_statushash->{$chain};
+	if ($stat->{action} ne 'exists') {
+	    warn "ebtables : unable to update chain '$chain'\n";
+	    $errors = 1;
+	}
+    }
+
     die "unable to apply firewall changes\n" if $errors;
 
     update_nf_conntrack_max($hostfw_conf);
 
     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
 
+    update_nf_conntrack_logging($hostfw_conf);
 }
 
 sub update_nf_conntrack_max {
@@ -3691,6 +4147,23 @@ sub update_nf_conntrack_tcp_timeout_established {
     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
 }
 
+my $log_nf_conntrack_enabled = undef;
+sub update_nf_conntrack_logging {
+    my ($hostfw_conf) = @_;
+
+    my $options = $hostfw_conf->{options} || {};
+    my $value = $options->{log_nf_conntrack} || 0;
+    if (!defined($log_nf_conntrack_enabled)
+	|| $value != $log_nf_conntrack_enabled)
+    {
+	my $tmpfile = "$pve_fw_status_dir/log_nf_conntrack";
+	PVE::Tools::file_set_contents($tmpfile, $value);
+
+	PVE::Tools::run_command([qw(systemctl try-reload-or-restart pvefw-logger.service)]);
+	$log_nf_conntrack_enabled = $value;
+    }
+}
+
 sub remove_pvefw_chains {
 
     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
@@ -3764,9 +4237,9 @@ sub update {
 
 	my $hostfw_conf = load_hostfw_conf($cluster_conf);
 
-	my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
+	my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile($cluster_conf, $hostfw_conf);
 
-	apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
+	apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
     };
 
     run_locked($code);