X-Git-Url: https://git.proxmox.com/?p=pve-firewall.git;a=blobdiff_plain;f=src%2FPVE%2FFirewall.pm;h=76684f9676ddc5a49bfcd3ab61b4725d72e8bf75;hp=3b6b24588274829e639e314cdb9cebacb19e1afb;hb=d31689ee39ce7365231f02301ec8770dfc633eb8;hpb=e2c627332f86e357b06773208feb5e235b53e307

diff --git a/src/PVE/Firewall.pm b/src/PVE/Firewall.pm
index 3b6b245..76684f9 100644
--- a/src/PVE/Firewall.pm
+++ b/src/PVE/Firewall.pm
@@ -19,7 +19,8 @@ use PVE::Tools qw(run_command lock_file dir_glob_foreach);
 use Encode;
 
 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
-my $clusterfw_conf_filename = "/etc/pve/firewall/cluster.fw";
+my $pvefw_conf_dir = "/etc/pve/firewall";
+my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
 
 # dynamically include PVE::QemuServer and PVE::OpenVZ
 # to avoid dependency problems
@@ -35,6 +36,14 @@ eval {
     $have_pve_manager = 1;
 };
 
+my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
+my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
+my $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
+
+my $max_alias_name_length = 64;
+my $max_ipset_name_length = 64;
+my $max_group_name_length = 20;
+
 PVE::JSONSchema::register_format('IPv4orCIDR', \&pve_verify_ipv4_or_cidr);
 sub pve_verify_ipv4_or_cidr {
     my ($cidr, $noerr) = @_;
@@ -48,20 +57,35 @@ sub pve_verify_ipv4_or_cidr {
     die "value does not look like a valid IP address or CIDR network\n";
 }
 
+PVE::JSONSchema::register_format('IPv4orCIDRorAlias', \&pve_verify_ipv4_or_cidr_or_alias);
+sub pve_verify_ipv4_or_cidr_or_alias {
+    my ($cidr, $noerr) = @_;
+
+    return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
+
+    if ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
+	return $cidr if Net::IP->new($cidr);
+	return undef if $noerr;
+	die Net::IP::Error() . "\n";
+    }
+    return undef if $noerr;
+    die "value does not look like a valid IP address or CIDR network\n";
+}
+
 PVE::JSONSchema::register_standard_option('ipset-name', {
     description => "IP set name.",
     type => 'string',
-    pattern => '[A-Za-z][A-Za-z0-9\-\_]+',
+    pattern => $ipset_name_pattern,
     minLength => 2,
-    maxLength => 20,
+    maxLength => $max_ipset_name_length,
 });
 
 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
     description => "Alias name.",
     type => 'string',
-    pattern => '[A-Za-z][A-Za-z0-9\-\_]+',
+    pattern => $ip_alias_pattern,
     minLength => 2,
-    maxLength => 20,
+    maxLength => $max_alias_name_length,
 });
 
 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
@@ -71,19 +95,12 @@ PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
     optional => 1,
 });
 
-my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
-my $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
-
-my $max_alias_name_length = 64;
-my $max_ipset_name_length = 64;
-
-
 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
     description => "Security Group name.",
     type => 'string',
     pattern => $security_group_name_pattern,
     minLength => 2,
-    maxLength => 20,
+    maxLength => $max_group_name_length,
 });
 
 my $feature_ipset_nomatch = 0;
@@ -472,7 +489,8 @@ my $pve_fw_parsed_macros;
 my $pve_fw_macro_descr;
 my $pve_fw_preferred_macro_names = {};
 
-my $pve_std_chains = {
+my $pve_std_chains = {};
+$pve_std_chains->{4} = {
     'PVEFW-SET-ACCEPT-MARK' => [
 	"-j MARK --set-mark 1",
     ],
@@ -743,7 +761,10 @@ sub local_network {
     return $__local_network;
 }
 
-my $max_iptables_ipset_name_length = 27;
+# ipset names are limited to 31 characters, and we use '_swap' 
+# suffix for atomic update, for example PVEFW-${VMID}-${ipset_name}_swap
+
+my $max_iptables_ipset_name_length = 31 - length("_swap");
 
 sub compute_ipset_chain_name {
     my ($vmid, $ipset_name) = @_;
@@ -760,6 +781,12 @@ sub compute_ipset_chain_name {
     return "PVEFW-$id";
 }
 
+sub compute_ipfilter_ipset_name {
+    my ($iface) = @_;
+
+    return "ipfilter-$iface";
+}
+
 sub parse_address_list {
     my ($str) = @_;
 
@@ -775,6 +802,8 @@ sub parse_address_list {
 
     my $count = 0;
     my $iprange = 0;
+    my $ipversion = undef;
+
     foreach my $elem (split(/,/, $str)) {
 	$count++;
 	if (!Net::IP->new($elem)) {
@@ -782,9 +811,11 @@ sub parse_address_list {
 	    die "invalid IP address: $err\n";
 	}
 	$iprange = 1 if $elem =~ m/-/;
+	$ipversion = Net::IP::ip_get_version($elem); #fixme : don't work with range
     }
 
     die "you can use a range in a list\n" if $iprange && $count > 1;
+    return $ipversion;
 }
 
 sub parse_port_name_number_or_range {
@@ -826,8 +857,8 @@ sub pve_fw_verify_port_spec {
    return $portstr;
 }
 
-PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
-sub pve_fw_verify_v4addr_spec {
+PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
+sub pve_fw_verify_addr_spec {
    my ($list) = @_;
 
    parse_address_list($list);
@@ -926,11 +957,11 @@ my $rule_properties = {
     },
     iface => get_standard_option('pve-iface', { optional => 1 }),
     source => {
-	type => 'string', format => 'pve-fw-v4addr-spec',
+	type => 'string', format => 'pve-fw-addr-spec',
 	optional => 1,
     },
     dest => {
-	type => 'string', format => 'pve-fw-v4addr-spec',
+	type => 'string', format => 'pve-fw-addr-spec',
 	optional => 1,
     },
     proto => {
@@ -1044,6 +1075,7 @@ sub verify_rule {
     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
 
     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
+    my $ipversion = undef;
 
     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
@@ -1065,12 +1097,12 @@ sub verify_rule {
 
 	if (my $value = $rule->{$name}) {
 	    if ($value =~ m/^\+/) {
-		if ($value =~ m/^\+(${security_group_name_pattern})$/) {
+		if ($value =~ m/^\+(${ipset_name_pattern})$/) {
 		    &$add_error($name, "no such ipset '$1'")
 			if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
 
 		} else {
-		    &$add_error($name, "invalid security group name '$value'");
+		    &$add_error($name, "invalid ipset name '$value'");
 		}
 	    } elsif ($value =~ m/^${ip_alias_pattern}$/){
 		my $alias = lc($value);
@@ -1142,13 +1174,13 @@ sub verify_rule {
     }
 
     if ($rule->{source}) {
-	eval { parse_address_list($rule->{source}); };
+	eval { $ipversion = parse_address_list($rule->{source}); };
 	&$add_error('source', $@) if $@;
 	&$check_ipset_or_alias_property('source');
     }
 
     if ($rule->{dest}) {
-	eval { parse_address_list($rule->{dest}); };
+	eval { $ipversion = parse_address_list($rule->{dest}); };
 	&$add_error('dest', $@) if $@;
 	&$check_ipset_or_alias_property('dest');
     }
@@ -1168,6 +1200,7 @@ sub verify_rule {
     }
 
     $rule->{errors} = $errors if $error_count;
+    $rule->{ipversion} = $ipversion if $ipversion;
 
     return $rule;
 }
@@ -1188,6 +1221,46 @@ sub copy_rule_data {
     return $rule;
 }
 
+sub rules_modify_permissions {
+    my ($rule_env) = @_;
+
+    if ($rule_env eq 'host') {
+	return {
+	    check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
+	};
+    } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
+	return {
+	    check => ['perm', '/', [ 'Sys.Modify' ]],
+	};
+    } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
+	return {
+	    check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
+	}
+    }
+
+    return undef;
+}
+
+sub rules_audit_permissions {
+    my ($rule_env) = @_;
+
+    if ($rule_env eq 'host') {
+	return {
+	    check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
+	};
+    } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
+	return {
+	    check => ['perm', '/', [ 'Sys.Audit' ]],
+	};
+    } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
+	return {
+	    check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
+	}
+    }
+
+    return undef;
+}
+
 # core functions
 my $bridge_firewall_enabled = 0;
 
@@ -1348,7 +1421,7 @@ sub ruleset_generate_cmdstr {
 
     if ($source) {
         if ($source =~ m/^\+/) {
-	    if ($source =~ m/^\+(${security_group_name_pattern})$/) {
+	    if ($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);
@@ -1377,7 +1450,7 @@ sub ruleset_generate_cmdstr {
 
     if ($dest) {
         if ($dest =~ m/^\+/) {
-	    if ($dest =~ m/^\+(${security_group_name_pattern})$/) {
+	    if ($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);
@@ -1607,7 +1680,7 @@ sub ruleset_chain_add_input_filters {
 }
 
 sub ruleset_create_vm_chain {
-    my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
+    my ($ruleset, $chain, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
 
     ruleset_create_chain($ruleset, $chain);
     my $accept = generate_nfqueue($options);
@@ -1626,6 +1699,9 @@ sub ruleset_create_vm_chain {
 	if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
 	    ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
 	}
+	if ($ipfilter_ipset) {
+	    ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
+	}
 	ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
     }
 }
@@ -1726,7 +1802,7 @@ sub generate_venet_rules_direction {
 
     my $chain = "venet0-$vmid-$direction";
 
-    ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
+    ruleset_create_vm_chain($ruleset, $chain, $options, undef, undef, $direction);
 
     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction);
 
@@ -1768,24 +1844,34 @@ sub generate_tap_rules_direction {
 
     my $tapchain = "$iface-$direction";
 
-    ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
+    my $ipfilter_name = compute_ipfilter_ipset_name($netid);
+    my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name)
+	if $vmfw_conf->{ipset}->{$ipfilter_name};	
 
-    ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options);
+    # create chain with mac and ip filter
+    ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $ipfilter_ipset, $direction);
 
-    ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
+    if ($options->{enable}) {
+	ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options);
 
-    # implement policy
-    my $policy;
+	ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
 
-    if ($direction eq 'OUT') {
-	$policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
-    } else {
+	# implement policy
+	my $policy;
+
+	if ($direction eq 'OUT') {
+	    $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
+	} else {
 	$policy = $options->{policy_in} || 'DROP'; # allow nothing by default
-    }
+	}
 
-    my $accept = generate_nfqueue($options);
-    my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
-    ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
+	my $accept = generate_nfqueue($options);
+	my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
+	ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
+    } else {
+	my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
+	ruleset_add_chain_policy($ruleset, $tapchain, $vmid, 'ACCEPT', $loglevel, $accept_action);
+    }
 
     # plug the tap chain to bridge chain
     if ($direction eq 'IN') {
@@ -1955,8 +2041,6 @@ for (my $i = 0; $i < $MAX_NETS; $i++)  {
 sub parse_fw_rule {
     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
 
-    chomp $line;
-
     my $orig_line = $line;
 
     my $rule = {};
@@ -2050,7 +2134,6 @@ sub parse_vmfw_option {
 	$opt = lc($1);
 	$value = $2;
     } else {
-	chomp $line;
 	die "can't parse option '$line'\n"
     }
 
@@ -2074,7 +2157,6 @@ sub parse_hostfw_option {
 	$opt = lc($1);
 	$value = int($2);
     } else {
-	chomp $line;
 	die "can't parse option '$line'\n"
     }
 
@@ -2093,13 +2175,27 @@ sub parse_clusterfw_option {
 	$opt = lc($1);
 	$value = uc($3);
     } else {
-	chomp $line;
 	die "can't parse option '$line'\n"
     }
 
     return ($opt, $value);
 }
 
+sub resolve_alias {
+    my ($clusterfw_conf, $fw_conf, $cidr) = @_;
+
+    if ($cidr !~ m/^\d/) {
+	my $alias = lc($cidr);
+	my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
+	$e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
+	return $e->{cidr} if $e;
+	
+	die "no such alias '$cidr'\n";
+    }
+
+    return $cidr;
+}
+
 sub parse_alias {
     my ($line) = @_;
 
@@ -2121,7 +2217,7 @@ sub parse_alias {
     return undef;
 }
 
-sub generic_fw_rules_parser {
+sub generic_fw_config_parser {
     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
 
     my $section;
@@ -2133,6 +2229,8 @@ sub generic_fw_rules_parser {
 	next if $line =~ m/^#/;
 	next if $line =~ m/^\s*$/;
 
+	chomp $line;
+
 	my $linenr = $fh->input_line_number();
 	my $prefix = "$filename (line $linenr)";
 
@@ -2150,6 +2248,16 @@ sub generic_fw_rules_parser {
 	    $section = 'groups';
 	    $group = lc($1);
 	    my $comment = $2;
+	    eval {
+		die "security group name too long\n" if length($group) > $max_group_name_length;
+		die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
+	    };
+	    if (my $err = $@) {
+		($section, $group, $comment) = undef;
+		warn "$prefix: $err";
+		next;
+	    }
+	    
 	    $res->{$section}->{$group} = [];
 	    $res->{group_comments}->{$group} =  decode('utf8', $comment)
 		if $comment;
@@ -2165,6 +2273,16 @@ sub generic_fw_rules_parser {
 	    $section = 'ipset';
 	    $group = lc($1);
 	    my $comment = $2;
+	    eval {	
+		die "ipset name too long\n" if length($group) > $max_ipset_name_length;
+		die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
+	    };
+	    if (my $err = $@) {
+		($section, $group, $comment) = undef;
+		warn "$prefix: $err";
+		next;
+	    }
+
 	    $res->{$section}->{$group} = [];
 	    $res->{ipset_comments}->{$group} = decode('utf8', $comment)
 		if $comment;
@@ -2218,20 +2336,36 @@ sub generic_fw_rules_parser {
 	    $line =~ m/^(\!)?\s*(\S+)\s*$/;
 	    my $nomatch = $1;
 	    my $cidr = $2;
+	    my $errors;
 
-	    if($cidr !~ m/^${ip_alias_pattern}$/) {
-		$cidr =~ s|/32$||;
+	    if ($nomatch && !$feature_ipset_nomatch) {
+		$errors->{nomatch} = "nomatch not supported by kernel";
+	    }
 
-		eval { pve_verify_ipv4_or_cidr($cidr); };
-		if (my $err = $@) {
-		    warn "$prefix: $cidr - $err";
-		    next;
+	    eval { 
+		if ($cidr =~ m/^${ip_alias_pattern}$/) {
+		    resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
+		} else {
+		    $cidr =~ s|/32$||;
+		    pve_verify_ipv4_or_cidr_or_alias($cidr);
 		}
+	    };
+	    if (my $err = $@) {
+		chomp $err;
+		$errors->{cidr} = $err;
 	    }
 
 	    my $entry = { cidr => $cidr };
 	    $entry->{nomatch} = 1 if $nomatch;
 	    $entry->{comment} = $comment if $comment;
+	    $entry->{errors} =  $errors if $errors;
+
+	    if ($verbose && $errors) {
+		warn "$prefix - errors in ipset '$group': $line\n";
+		foreach my $p (keys %{$errors}) {
+		    warn "  $p: $errors->{$p}\n";
+		}
+	    }
 
 	    push @{$res->{$section}->{$group}}, $entry;
 	} else {
@@ -2243,15 +2377,15 @@ sub generic_fw_rules_parser {
     return $res;
 }
 
-sub parse_host_fw_rules {
+sub parse_hostfw_config {
     my ($filename, $fh, $cluster_conf, $verbose) = @_;
 
     my $empty_conf = { rules => [], options => {}};
 
-    return generic_fw_rules_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
+    return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
 }
 
-sub parse_vm_fw_rules {
+sub parse_vmfw_config {
     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
 
     my $empty_conf = {
@@ -2262,10 +2396,10 @@ sub parse_vm_fw_rules {
 	ipset_comments => {},
     };
 
-    return generic_fw_rules_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
+    return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
 }
 
-sub parse_cluster_fw_rules {
+sub parse_clusterfw_config {
     my ($filename, $fh, $verbose) = @_;
 
     my $section;
@@ -2281,7 +2415,7 @@ sub parse_cluster_fw_rules {
 	ipset_comments => {},
     };
 
-    return generic_fw_rules_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
+    return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
 }
 
 sub run_locked {
@@ -2337,11 +2471,11 @@ sub load_vmfw_conf {
 
     my $vmfw_conf = {};
 
-    $dir = "/etc/pve/firewall" if !defined($dir);
+    $dir = $pvefw_conf_dir if !defined($dir);
 
     my $filename = "$dir/$vmid.fw";
     if (my $fh = IO::File->new($filename, O_RDONLY)) {
-	$vmfw_conf = parse_vm_fw_rules($filename, $fh, $cluster_conf, $rule_env, $verbose);
+	$vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
 	$vmfw_conf->{vmid} = $vmid;
     }
 
@@ -2457,21 +2591,23 @@ sub save_vmfw_conf {
     my $raw = '';
 
     my $options = $vmfw_conf->{options};
-    $raw .= &$format_options($options) if scalar(keys %$options);
+    $raw .= &$format_options($options) if $options && scalar(keys %$options);
 
     my $aliases = $vmfw_conf->{aliases};
-    $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
+    $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
 
-    $raw .= &$format_ipsets($vmfw_conf);
+    $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
 
     my $rules = $vmfw_conf->{rules} || [];
-    if (scalar(@$rules)) {
+    if ($rules && scalar(@$rules)) {
 	$raw .= "[RULES]\n\n";
 	$raw .= &$format_rules($rules, 1);
 	$raw .= "\n";
     }
 
-    my $filename = "/etc/pve/firewall/$vmid.fw";
+    mkdir $pvefw_conf_dir;
+
+    my $filename = "$pvefw_conf_dir/$vmid.fw";
     PVE::Tools::file_set_contents($filename, $raw);
 }
 
@@ -2512,29 +2648,35 @@ sub get_option_log_level {
 }
 
 sub generate_std_chains {
-    my ($ruleset, $options) = @_;
+    my ($ruleset, $options, $ipversion) = @_;
+
+    my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
 
     my $loglevel = get_option_log_level($options, 'smurf_log_level');
 
-    # same as shorewall smurflog.
-    my $chain = 'PVEFW-smurflog';
-    $pve_std_chains->{$chain} = [];
+    my $chain;
 
-    push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
-    push @{$pve_std_chains->{$chain}}, "-j DROP";
+    if ($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";
+    }
 
     # same as shorewall logflags action.
     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
     $chain = 'PVEFW-logflags';
-    $pve_std_chains->{$chain} = [];
+    $std_chains->{$chain} = [];
 
     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
-    push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
-    push @{$pve_std_chains->{$chain}}, "-j DROP";
+    push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
+    push @{$std_chains->{$chain}}, "-j DROP";
 
-    foreach my $chain (keys %$pve_std_chains) {
+    foreach my $chain (keys %$std_chains) {
 	ruleset_create_chain($ruleset, $chain);
-	foreach my $rule (@{$pve_std_chains->{$chain}}) {
+	foreach my $rule (@{$std_chains->{$chain}}) {
 	    if (ref($rule)) {
 		ruleset_generate_rule($ruleset, $chain, $rule);
 	    } else {
@@ -2570,20 +2712,12 @@ sub generate_ipset {
     # remove duplicates
     my $nethash = {};
     foreach my $entry (@$options) {
-	my $cidr = $entry->{cidr};
-	if ($cidr =~ m/^${ip_alias_pattern}$/) {
-	    my $alias = lc($cidr);
-	    my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
-	    $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
-	    if ($e) {
-		$entry->{cidr} = $e->{cidr};
-		$nethash->{$entry->{cidr}} = $entry;
-	    } else {
-		warn "no such alias '$cidr'\n";
-	    }
-	} else {
-	    $nethash->{$entry->{cidr}} = $entry;
-	}
+	next if $entry->{errors}; # skip entries with errors
+	eval {
+	    my $cidr = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
+	    $nethash->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
+	};
+	warn $@ if $@;
     }
 
     foreach my $cidr (sort keys %$nethash) {
@@ -2617,7 +2751,7 @@ sub load_clusterfw_conf {
 
     my $cluster_conf = {};
     if (my $fh = IO::File->new($filename, O_RDONLY)) {
-	$cluster_conf = parse_cluster_fw_rules($filename, $fh, $verbose);
+	$cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
     }
 
     return $cluster_conf;
@@ -2629,33 +2763,36 @@ sub save_clusterfw_conf {
     my $raw = '';
 
     my $options = $cluster_conf->{options};
-    $raw .= &$format_options($options) if scalar(keys %$options);
+    $raw .= &$format_options($options) if $options && scalar(keys %$options);
 
     my $aliases = $cluster_conf->{aliases};
-    $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
+    $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
 
-    $raw .= &$format_ipsets($cluster_conf);
+    $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
  
     my $rules = $cluster_conf->{rules};
-    if (scalar(@$rules)) {
+    if ($rules && scalar(@$rules)) {
 	$raw .= "[RULES]\n\n";
 	$raw .= &$format_rules($rules, 1);
 	$raw .= "\n";
     }
 
-    foreach my $group (sort keys %{$cluster_conf->{groups}}) {
-	my $rules = $cluster_conf->{groups}->{$group};
-	if (my $comment = $cluster_conf->{group_comments}->{$group}) {
-	    my $utf8comment = encode('utf8', $comment);
-	    $raw .= "[group $group] # $utf8comment\n\n";
-	} else {
-	    $raw .= "[group $group]\n\n";
-	}
+    if ($cluster_conf->{groups}) {
+	foreach my $group (sort keys %{$cluster_conf->{groups}}) {
+	    my $rules = $cluster_conf->{groups}->{$group};
+	    if (my $comment = $cluster_conf->{group_comments}->{$group}) {
+		my $utf8comment = encode('utf8', $comment);
+		$raw .= "[group $group] # $utf8comment\n\n";
+	    } else {
+		$raw .= "[group $group]\n\n";
+	    }
 
-	$raw .= &$format_rules($rules, 0);
-	$raw .= "\n";
+	    $raw .= &$format_rules($rules, 0);
+	    $raw .= "\n";
+	}
     }
 
+    mkdir $pvefw_conf_dir;
     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
 }
 
@@ -2666,7 +2803,7 @@ sub load_hostfw_conf {
 
     my $hostfw_conf = {};
     if (my $fh = IO::File->new($filename, O_RDONLY)) {
-	$hostfw_conf = parse_host_fw_rules($filename, $fh, $cluster_conf, $verbose);
+	$hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
     }
     return $hostfw_conf;
 }
@@ -2677,10 +2814,10 @@ sub save_hostfw_conf {
     my $raw = '';
 
     my $options = $hostfw_conf->{options};
-    $raw .= &$format_options($options) if scalar(keys %$options);
+    $raw .= &$format_options($options) if $options && scalar(keys %$options);
 
     my $rules = $hostfw_conf->{rules};
-    if (scalar(@$rules)) {
+    if ($rules && scalar(@$rules)) {
 	$raw .= "[RULES]\n\n";
 	$raw .= &$format_rules($rules, 1);
 	$raw .= "\n";
@@ -2712,6 +2849,13 @@ sub compile {
 	$vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
     }
 
+    my ($ruleset, $ipset_ruleset) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
+    return ($ruleset, $ipset_ruleset);
+}
+
+sub compile_iptables_filter {
+    my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
+
     $cluster_conf->{ipset}->{venet0} = [];
     my $venet0_ipset_chain = compute_ipset_chain_name(0, 'venet0');
 
@@ -2725,6 +2869,8 @@ sub compile {
 
     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
 
+    return ({}, {}) if !$cluster_conf->{options}->{enable};
+
     my $ruleset = {};
 
     ruleset_create_chain($ruleset, "PVEFW-INPUT");
@@ -2757,7 +2903,7 @@ sub compile {
 
     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
 
-    generate_std_chains($ruleset, $hostfw_options);
+    generate_std_chains($ruleset, $hostfw_options, $ipversion);
 
     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
 
@@ -2776,7 +2922,6 @@ sub compile {
 	    my $conf = $vmdata->{qemu}->{$vmid};
 	    my $vmfw_conf = $vmfw_configs->{$vmid};
 	    return if !$vmfw_conf;
-	    return if !$vmfw_conf->{options}->{enable};
 
 	    generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
 
@@ -2803,32 +2948,34 @@ sub compile {
 
 	    my $vmfw_conf = $vmfw_configs->{$vmid};
 	    return if !$vmfw_conf;
-	    return if !$vmfw_conf->{options}->{enable};
 
 	    generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
 
-	    if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
-		my $ip = $conf->{ip_address}->{value};
-		$ip =~ s/\s+/,/g;
-		parse_address_list($ip); # make sure we have a valid $ip list
+	    if ($vmfw_conf->{options}->{enable}) {
+		if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
+		    my $ip = $conf->{ip_address}->{value};
+		    $ip =~ s/\s+/,/g;
+		    parse_address_list($ip); # make sure we have a valid $ip list
 
-		my @ips = split(',', $ip);
+		    my @ips = split(',', $ip);
 
-		foreach my $singleip (@ips) {
-		    my $venet0ipset = {};
-		    $venet0ipset->{cidr} = $singleip;
-		    push @{$cluster_conf->{ipset}->{venet0}}, $venet0ipset;
-		}
+		    foreach my $singleip (@ips) {
+			my $venet0ipset = {};
+			$venet0ipset->{cidr} = $singleip;
+			push @{$cluster_conf->{ipset}->{venet0}}, $venet0ipset;
+		    }
 
-		generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
-		generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
+		    generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
+		    generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
+		}
 	    }
 
 	    if ($conf->{netif} && $conf->{netif}->{value}) {
 		my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
 		foreach my $netid (keys %$netif) {
 		    my $d = $netif->{$netid};
-
+		    my $bridge = $d->{bridge};
+		    next if !$bridge || $bridge !~ m/^vmbr\d+(v(\d+))?f$/; # firewall enabled ?
 		    my $macaddr = $d->{mac};
 		    my $iface = $d->{host_ifname};
 		    generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
@@ -2913,8 +3060,9 @@ sub get_ruleset_cmdlist {
     }
 
     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
-	if (!$hooks->{$h}) {
-	    $cmdlist .= "-A $h -j PVEFW-$h\n";
+	my $chain = "PVEFW-$h";
+	if ($ruleset->{$chain} && !$hooks->{$h}) {
+	    $cmdlist .= "-A $h -j $chain\n";
 	}
     }
 
@@ -3114,6 +3262,17 @@ sub remove_pvefw_chains {
     $cmdlist .= "COMMIT\n";
 
     iptables_restore_cmdlist($cmdlist);
+
+    my $ipset_chains = ipset_get_chains();
+
+    $cmdlist = "";
+ 
+    foreach my $chain (keys %$ipset_chains) {
+       $cmdlist .= "flush $chain\n";
+       $cmdlist .= "destroy $chain\n";
+    }
+
+    ipset_restore_cmdlist($cmdlist) if $cmdlist; 
 }
 
 sub init {
@@ -3132,11 +3291,7 @@ sub update {
 	my $cluster_conf = load_clusterfw_conf();
 	my $cluster_options = $cluster_conf->{options};
 
-	my $enable = $cluster_options->{enable};
-
-	die "Firewall is disabled - cannot start\n" if !$enable;
-
-	if (!$enable) {
+	if (!$cluster_options->{enable}) {
 	    PVE::Firewall::remove_pvefw_chains();
 	    return;
 	}