X-Git-Url: https://git.proxmox.com/?p=pve-firewall.git;a=blobdiff_plain;f=PVE%2FFirewall.pm;h=f5ae88f392bd76fbb9e5c10374f6957509507a95;hp=1b52ca3a2029f326d2040d5517a3a03803db9db5;hb=35b66e9d6bd3243b3afd979b3305e7c9e5f48c57;hpb=8c32a215951ba04399f29ef651bdf8dc3fdd3011

diff --git a/PVE/Firewall.pm b/PVE/Firewall.pm
index 1b52ca3..f5ae88f 100644
--- a/PVE/Firewall.pm
+++ b/PVE/Firewall.pm
@@ -16,18 +16,334 @@ use Data::Dumper;
 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 
 # todo: define more MACROS
-# inspired by: /usr/share/shorewall/macro.*
+# imported/converted from: /usr/share/shorewall/macro.*
 my $pve_fw_macros = {
-    BitTorrent => [
+    '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' } 
+	{ 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' },
     ],
-    HTTP => [
+    '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 => [
+    '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 => '8' },
+    ],
+    '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 => '8' },
+    ],
+    '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;
@@ -73,6 +389,7 @@ sub get_etc_services {
 
 	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};
 	}
@@ -141,9 +458,13 @@ sub parse_port_name_number_or_range {
     my $nbports = 0;
     foreach my $item (split(/,/, $str)) {
 	my $portlist = "";
+	my $oldpon = undef;
 	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 && $pon > 65536;
+		die "invalid port '$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};
 	    }
@@ -322,7 +643,7 @@ sub generate_bridge_chains {
     if (!ruleset_chain_exist($ruleset, "PVEFW-FORWARD")){
 	ruleset_create_chain($ruleset, "PVEFW-FORWARD");
 
-	ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m state --state RELATED,ESTABLISHED -j ACCEPT");
+	ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
 	ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-in --physdev-is-bridged -j PVEFW-BRIDGE-OUT");
 	ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-out --physdev-is-bridged -j PVEFW-BRIDGE-IN");
     }
@@ -348,8 +669,8 @@ sub generate_tap_rules_direction {
 
     ruleset_create_chain($ruleset, $tapchain);
 
-    ruleset_addrule($ruleset, $tapchain, "-m state --state INVALID -j DROP");
-    ruleset_addrule($ruleset, $tapchain, "-m state --state RELATED,ESTABLISHED -j ACCEPT");
+    ruleset_addrule($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)) {
 	ruleset_addrule($ruleset, $tapchain, "-m mac ! --mac-source $macaddr -j DROP");
@@ -399,11 +720,11 @@ sub enablehostfw {
     my $chain = "PVEFW-HOST-IN";
     ruleset_create_chain($ruleset, $chain);
 
-    ruleset_addrule($ruleset, $chain, "-m state --state INVALID -j DROP");
-    ruleset_addrule($ruleset, $chain, "-m state --state RELATED,ESTABLISHED -j ACCEPT");
+    ruleset_addrule($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, $chain, "-p udp -m state --state NEW -m multiport --dports 5404,5405 -j ACCEPT");
+    ruleset_addrule($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}) {
@@ -421,11 +742,11 @@ sub enablehostfw {
     $chain = "PVEFW-HOST-OUT";
     ruleset_create_chain($ruleset, $chain);
 
-    ruleset_addrule($ruleset, $chain, "-m state --state INVALID -j DROP");
-    ruleset_addrule($ruleset, $chain, "-m state --state RELATED,ESTABLISHED -j ACCEPT");
+    ruleset_addrule($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, $chain, "-p udp -m state --state NEW -m multiport --dports 5404,5405 -j ACCEPT");
+    ruleset_addrule($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}) {
@@ -565,7 +886,14 @@ sub parse_fw_rule {
 	    my $rule = {};
 	    foreach my $k (keys %$templ) {
 		my $v = $templ->{$k};
-		$v = $param->{$k} if $v eq 'PARAM';
+		if ($v eq 'PARAM') {
+		    $v = $param->{$k};
+		} elsif ($v eq 'DEST') {
+		    $v = $param->{dest};
+		} elsif ($v eq 'SOURCE') {
+		    $v = $param->{source};
+		}
+
 		die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
 		$rule->{$k} = $v;
 	    }
@@ -585,10 +913,29 @@ sub parse_fw_rule {
     return $rules;
 }
 
+sub parse_fw_option {
+    my ($line) = @_;
+
+    my ($opt, $value);
+
+    if ($line =~ m/^enable:\s*(0|1)\s*$/i) {
+	$opt = 'enable';
+	$value = int($1);
+    } elsif ($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 => [] };
+    my $res = { in => [], out => [], options => {}};
 
     my $section;
 
@@ -599,8 +946,9 @@ sub parse_vm_fw_rules {
 	my $linenr = $fh->input_line_number();
 	my $prefix = "$filename (line $linenr)";
 
-	if ($line =~ m/^\[(in|out)\]\s*$/i) {
+	if ($line =~ m/^\[(\S+)\]\s*$/i) {
 	    $section = lc($1);
+	    warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
 	    next;
 	}
 	if (!$section) {
@@ -608,6 +956,17 @@ sub parse_vm_fw_rules {
 	    next;
 	}
 
+	next if !$res->{$section}; # skip undefined section
+
+	if ($section eq 'options') {
+	    eval { 
+		my ($opt, $value) = parse_fw_option($line); 
+		$res->{options}->{$opt} = $value;
+	    };
+	    warn "$prefix: $@" if $@;
+	    next;
+	}
+
 	my $rules;
 	eval { $rules = parse_fw_rule($line, 1, 1); };
 	if (my $err = $@) {
@@ -755,23 +1114,30 @@ sub compile {
 
     my $ruleset = {};
 
-    # setup host firewall rules
     ruleset_create_chain($ruleset, "PVEFW-INPUT");
     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
+    ruleset_create_chain($ruleset, "PVEFW-FORWARD");
 
     ruleset_create_chain($ruleset, "PVEFW-SET-ACCEPT-MARK");
     ruleset_addrule($ruleset, "PVEFW-SET-ACCEPT-MARK", "-j MARK --set-mark 1");
 
+    my $enable_hostfw = 0;
     $filename = "/etc/pve/local/host.fw";
     if (my $fh = IO::File->new($filename, O_RDONLY)) {
 	my $host_rules = parse_host_fw_rules($filename, $fh);
+
+	$enable_hostfw = 1;
+
 	enablehostfw($ruleset, $host_rules, $group_rules);
     }
 
     # generate firewall rules for QEMU VMs 
     foreach my $vmid (keys %{$vmdata->{qemu}}) {
 	my $conf = $vmdata->{qemu}->{$vmid};
+
 	next if !$rules->{$vmid};
+	my $options = $rules->{$vmid}->{options};
+	next if defined($options->{enable}) && ($options->{enable} == 0);
 
 	foreach my $netid (keys %$conf) {
 	    next if $netid !~ m/^net(\d+)$/;
@@ -784,6 +1150,7 @@ sub compile {
 
 	    $bridge .= "v$net->{tag}" if $net->{tag};
 
+
 	    generate_bridge_chains($ruleset, $bridge);
 
 	    my $macaddr = $net->{macaddr};
@@ -791,6 +1158,12 @@ sub compile {
 	    generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $rules->{$vmid}->{out}, $bridge, 'OUT');
 	}
     }
+
+    if ($enable_hostfw) {
+	# allow traffic from lo (ourself)
+	ruleset_addrule($ruleset, "PVEFW-INPUT", "-i lo -j ACCEPT");
+    }
+
     return $ruleset;
 }
 
@@ -907,6 +1280,9 @@ sub apply_ruleset {
     }
     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";
     }