diff --git a/Shorewall-perl/Shorewall/Chains.pm b/Shorewall-perl/Shorewall/Chains.pm
index e7144c1c2..87dedd981 100644
--- a/Shorewall-perl/Shorewall/Chains.pm
+++ b/Shorewall-perl/Shorewall/Chains.pm
@@ -589,11 +589,15 @@ sub use_input_chain($) {
     # We must use the interfaces's chain if the interface is associated with multiple zone nets
     #    
     return 1 if $interfaceref->{nets} != 1;
-    
+    #
+    # Interface associated with a single zone -- use the zone's input chain if it has one
+    #
     my $chainref = $filter_table->{zone_input_chain $interfaceref->{zone}};
 
     return 1 if $chainref;
-
+    #
+    # Use the '<zone>2fw' chain if it is referenced.
+    #
     $chainref = $filter_table->{join( '' , $interfaceref->{zone} , '2' , firewall_zone )};
 
     ! $chainref->{referenced};
@@ -624,11 +628,15 @@ sub use_output_chain($) {
     # We must use the interfaces's chain if the interface is associated with multiple zone nets
     #    
     return 1 if $interfaceref->{nets} != 1;
-    
+    #
+    # Interface associated with a single zone -- use the zone's output chain if it has one
+    #    
     my $chainref = $filter_table->{zone_output_chain $interfaceref->{zone}};
 
     return 1 if $chainref;
-
+    #
+    # Use the 'fw2<zone>' chain if it is referenced.
+    #
     $chainref = $filter_table->{join( '', firewall_zone , '2', $interfaceref->{zone} )};
 
     ! $chainref->{referenced};
diff --git a/Shorewall-perl/Shorewall/Rules.pm b/Shorewall-perl/Shorewall/Rules.pm
index a3ea4d7b6..a72468899 100644
--- a/Shorewall-perl/Shorewall/Rules.pm
+++ b/Shorewall-perl/Shorewall/Rules.pm
@@ -1502,19 +1502,6 @@ sub generate_matrix() {
     my $preroutingref = ensure_chain 'nat', 'dnat';
     my $fw = firewall_zone;
 
-    #
-    # Add the jumps to the interface chains from filter FORWARD, INPUT, OUTPUT
-    #
-    for my $interface ( @interfaces ) {
-	
-	add_rule $filter_table->{FORWARD} , match_source_dev( $interface ) . "-j " . forward_chain $interface if use_forward_chain $interface;
-	add_rule $filter_table->{INPUT}   , match_source_dev( $interface ) . "-j " . input_chain($interface)  if use_input_chain $interface;
-
-	if ( use_output_chain $interface ) {
-	    add_rule $filter_table->{OUTPUT}  , "-o $interface -j " . output_chain $interface unless get_interface_option( $interface, 'port' );
-	}
-    }
-
     #
     # Set up forwarding chain for each zone
     #
@@ -1883,6 +1870,19 @@ sub generate_matrix() {
 	addnatjump 'POSTROUTING' , masq_chain( $interface ) , match_dest_dev( $interface );
     }
 
+    #
+    # Add the jumps to the interface chains from filter FORWARD, INPUT, OUTPUT
+    #
+    for my $interface ( @interfaces ) {
+	
+	add_rule $filter_table->{FORWARD} , match_source_dev( $interface ) . "-j " . forward_chain $interface if use_forward_chain $interface;
+	add_rule $filter_table->{INPUT}   , match_source_dev( $interface ) . "-j " . input_chain($interface)  if use_input_chain $interface;
+
+	if ( use_output_chain $interface ) {
+	    add_rule $filter_table->{OUTPUT}  , "-o $interface -j " . output_chain $interface unless get_interface_option( $interface, 'port' );
+	}
+    }
+
     my $chainref = $filter_table->{"${fw}2${fw}"};
 
     add_rule $filter_table->{OUTPUT} , "-o lo -j " . ($chainref->{referenced} ? "$chainref->{name}" : 'ACCEPT' );
diff --git a/Shorewall-perl/Shorewall/Zones.pm b/Shorewall-perl/Shorewall/Zones.pm
index c054ea8f0..5bd711550 100644
--- a/Shorewall-perl/Shorewall/Zones.pm
+++ b/Shorewall-perl/Shorewall/Zones.pm
@@ -633,27 +633,26 @@ sub validate_interfaces_file( $ )
 
 	    fatal_error "Invalid Interface Name ($interface:$port)" unless $port =~ /^[\w.@%-]+\+?$/;
 
-	    $interfaces{$port}{bridge} = $bridge = $interface;
+	    $bridge = $interface;
 	    $interface = $port;
 	} else {
 	    fatal_error "Duplicate Interface ($interface)" if $interfaces{$interface};
 	    fatal_error "Zones of type 'bport' may only be associated with bridge ports" if $zone && $zoneref->{type} eq 'bport4';
-	    $interfaces{$interface}{bridge} = $interface;
+	    $bridge = $interface;
 	}
 
-	$interfaces{$interface}{name} = $interface;
-	$interfaces{$interface}{nets} = 0;
-	$interfaces{$interface}{number} = ++$num;
-	
 	my $wildcard = 0;
+	my $root;
 
 	if ( $interface =~ /\+$/ ) {
 	    $wildcard = 1;
-	    $interfaces{$interface}{root} = substr( $interface, 0, -1 );
+	    $root = substr( $interface, 0, -1 );
 	} else {
-	    $interfaces{$interface}{root} = $interface;
+	    $root = $interface;
 	}
 
+	my $broadcasts;
+
 	unless ( $networks eq '' || $networks eq 'detect' ) {
 	    my @broadcasts = split $networks, 'address';
 
@@ -664,7 +663,7 @@ sub validate_interfaces_file( $ )
 	    if ( $capabilities{ADDRTYPE} ) {
 		warning_message 'Shorewall no longer uses broadcast addresses in rule generation when Address Type Match is available';
 	    } else {
-		$interfaces{$interface}{broadcasts} = \@broadcasts;
+		$broadcasts = \@broadcasts;
 	    }
 	}
 
@@ -728,8 +727,16 @@ sub validate_interfaces_file( $ )
 	    $options{port} = 1;
 	}
 
-	$interfaces{$interface}{options} = $optionsref = \%options;
+	$optionsref = \%options;
 
+	$interfaces{$interface} = { name       => $interface ,
+				    bridge     => $bridge ,
+				    nets       => 0 ,
+				    number     => ++$num ,
+				    root       => $root ,
+				    broadcasts => $broadcasts ,
+				    options    => $optionsref };
+ 
 	push @ifaces, $interface;
 
 	my @networks = allipv4;