diff --git a/Shorewall-perl/Shorewall/Chains.pm b/Shorewall-perl/Shorewall/Chains.pm
index d48486ff1..575bd8e4c 100644
--- a/Shorewall-perl/Shorewall/Chains.pm
+++ b/Shorewall-perl/Shorewall/Chains.pm
@@ -98,6 +98,8 @@ our @EXPORT = qw( STANDARD
 		  do_ratelimit
 		  do_user
 		  do_tos
+		  match_source_dev
+		  match_dest_dev
 		  iprange_match
 		  match_source_net
 		  match_dest_net
@@ -1029,6 +1031,32 @@ sub do_tos( $ ) {
     $tos ne '-' ? "-m tos --tos $tos " : '';
 }
 
+#
+# Match Source Interface
+#
+sub match_source_dev( $ ) {
+    my $interface = shift;
+    my $interfaceref =  $interfaces{$interface};
+    if ( $interfaceref->{options}{port} ) {
+	"-i $interfaceref->{bridge} -m physdev --physdev-in $interface ";
+    } else {
+	"-i $interface ";
+    }
+}    
+
+#
+# Match Dest device
+#
+sub match_dest_dev( $ ) {
+    my $interface = shift;
+    my $interfaceref =  $interfaces{$interface};
+    if ( $interfaceref->{options}{port} ) {
+	"-o $interfaceref->{bridge} -m physdev --physdev-out $interface ";
+    } else {
+	"-o $interface ";
+    }
+}    
+
 #
 # Avoid generating a second '-m iprange' in a single rule.
 #
@@ -1414,6 +1442,8 @@ sub expand_rule( $$$$$$$$$$ )
 	    #
 	    # An interface in the SOURCE column of a masq file
 	    #
+	    fatal_error "Bridge ports may not appear in the SOURCE column of this file" if port_to_bridge( $iiface );
+
 	    my $networks = get_interface_nets ( $iiface );
 
 	    add_command( $chainref , join( '', 'for source in ', $networks, '; do' ) );
@@ -1424,9 +1454,8 @@ sub expand_rule( $$$$$$$$$$ )
 	    #
 	    $chainref->{loopcount}++;
 	} else {
-	    fatal_error "Source Interface ($iiface) not allowed when the source zone is $firewall_zone"
-		if $restriction & OUTPUT_RESTRICT;
-	    $rule .= "-i $iiface ";
+	    fatal_error "Source Interface ($iiface) not allowed when the source zone is $firewall_zone" if $restriction & OUTPUT_RESTRICT;
+	    $rule .= match_source_dev( $iiface );
 	}
     }
 
@@ -1480,13 +1509,19 @@ sub expand_rule( $$$$$$$$$$ )
 	    #
 	    # ADDRESS 'detect' in the masq file.
 	    #
+	    fatal_error "Bridge port ( $diface) not allowed" if port_to_bridge( $diface );
 	    add_command( $chainref , 'for dest in ' . get_interface_addresses( $diface) . '; do' );
 	    $rule .= '-d $dest';
 	    $chainref->{loopcount}++;
 	} else {
-	    fatal_error "Destination Interface ($diface) not allowed when the destination zone is $firewall_zone"
-		if $restriction & INPUT_RESTRICT;
-	    $rule .= "-o $diface ";
+	    fatal_error "Destination Interface ($diface) not allowed when the destination zone is $firewall_zone" if $restriction & INPUT_RESTRICT;
+
+	    if ( $iiface ) {
+		my $bridge = port_to_bridge( $diface );
+		fatal_error "Source interface ( $iiface) is not a port on the same bridge as the destination interface ( $diface )" if $bridge && $bridge ne source_port_to_bridge( $iiface );
+	    }
+
+	    $rule .= match_dest_dev( $diface );
 	}
     }
 
diff --git a/Shorewall-perl/Shorewall/Interfaces.pm b/Shorewall-perl/Shorewall/Interfaces.pm
index 55618d56e..8fb576897 100644
--- a/Shorewall-perl/Shorewall/Interfaces.pm
+++ b/Shorewall-perl/Shorewall/Interfaces.pm
@@ -38,6 +38,7 @@ our @ISA = qw(Exporter);
 our @EXPORT = qw( add_group_to_zone
 		  validate_interfaces_file
 		  known_interface
+		  port_to_bridge
 		  interface_is_optional
 		  find_interfaces_by_option
 		  get_interface_option
@@ -182,13 +183,15 @@ sub validate_interfaces_file()
 
     my $first_entry = 1;
 
+    my @ifaces;
+
     while ( read_a_line ) {
 
 	if ( $first_entry ) {
 	    progress_message2 "$doing $fn...";
 	    $first_entry = 0;
 	}
-
+	
 	my ($zone, $interface, $networks, $options ) = split_line 2, 4, 'interfaces file';
 	my $zoneref;
 	my $bridge = '';
@@ -209,23 +212,32 @@ sub validate_interfaces_file()
 
 	fatal_error "Invalid INTERFACE" if defined $extra || ! $interface;	
 
-	fatal_error "Duplicate Interface ($interface)" if $interfaces{$interface};
-
-	fatal_error "Invalid Interface Name: $interface" if $interface eq '+';
+	fatal_error "Invalid Interface Name ( $interface )" if $interface eq '+';
 
 	if ( defined $port ) {
 	    require_capability( 'PHYSDEV_MATCH', 'Bridge Ports', '');
 	    require_capability( 'KLUDGEFREE', 'Bridge Ports', '');
+	    fatal_error "Duplicate Interface ( $port )" if $interfaces{$port};
 	    fatal_error "$interface is not a defined bridge" unless $interfaces{$interface} && $interfaces{$interface}{options}{bridge};
-	    fatal_error "Invalid Bridge Port Name ($port)"   unless $port =~ /^([\w.@%-]+\+?)$/;
+	    fatal_error "Invalid Interface Name ( $interface:$port )" unless $port =~ /^[\w.@%-]+\+?$/;
 	    fatal_error "Bridge Ports may only be associated with 'bport' zones" if $zone && $zoneref->{type} ne 'bport4';
+
+	    if ( $zone ) {
+		if ( $zoneref->{bridge} ) {
+		    fatal_error "Bridge Port zones may only be associated with a single bridge" if $zoneref->{bridge} ne $interface;
+		} else {
+		    $zoneref->{bridge} = $interface;
+		}
+	    }
+
 	    $interfaces{$port}{bridge} = $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;
 	}
-
+    
 	my $wildcard = 0;
 
 	if ( $interface =~ /\+$/ ) {
@@ -234,7 +246,7 @@ sub validate_interfaces_file()
 	} else {	    
 	    $interfaces{$interface}{root} = $interface;
 	}
-
+    
 	unless ( $networks eq '' || $networks eq 'detect' ) {
 
 	    for my $address ( split /,/, $networks ) {
@@ -300,7 +312,7 @@ sub validate_interfaces_file()
 	
 	$interfaces{$interface}{options} = $optionsref = \%options;
 
-	push @interfaces, $interface;
+	push @ifaces, $interface;
 
 	my @networks;
 
@@ -316,10 +328,27 @@ sub validate_interfaces_file()
 	add_group_to_zone( $zone, $zoneref->{type}, $interface, \@networks, $optionsref ) if $zone && @networks;
 
     	$interfaces{$interface}{zone} = $zone; #Must follow the call to add_group_to_zone()
-
+    
 	progress_message "   Interface \"$line\" Validated";
 
     }
+
+    #
+    # We now assemble the @interfaces array such that bridge ports immediately precede their associated bridge
+    #
+    for my $interface ( @ifaces ) {
+	my $interfaceref = $interfaces{$interface};
+	
+	next if $interfaceref->{options}{port};
+	
+	if ( $interfaceref->{options}{bridge} ) {
+	    for my $port ( grep $interfaces{$_}{options}{port} && $interfaces{$_}{bridge} eq $interface, @ifaces ) {
+		push @interfaces, $port;
+	    }
+	}
+	
+	push @interfaces, $interface;
+    }	
 }
 
 #
@@ -349,6 +378,24 @@ sub known_interface($)
     0;
 }
 
+#
+# Return the bridge associated with the passed interface. If the interface is not a bridge port,
+# return ''
+#
+sub port_to_bridge( $ ) {
+    my $portref = $interfaces{$_[0]};
+    return $portref && $portref->{options}{port} ? $portref->{bridge} : '';
+}
+
+#
+# Return the bridge associated with the passed interface. If the interface is not a bridge port, return 
+# the name of the interface itself.
+#
+sub source_port_to_bridge( $ ) {
+    my $portref = $interfaces{$_[0]};
+    return $portref ? $portref->{bridge} : '';
+}
+
 #
 # Return the 'optional' setting of the passed interface
 #
diff --git a/Shorewall-perl/Shorewall/Rules.pm b/Shorewall-perl/Shorewall/Rules.pm
index 87c42b8ba..adf786f45 100644
--- a/Shorewall-perl/Shorewall/Rules.pm
+++ b/Shorewall-perl/Shorewall/Rules.pm
@@ -1374,32 +1374,6 @@ sub generate_matrix() {
 	add_rule $chainref, "-j $name";
     }
 
-    #
-    # Match Source Interface
-    #
-    sub match_source_dev( $ ) {
-	my $interface = shift;
-	my $interfaceref =  $interfaces{$interface};
-	if ( $interfaceref->{options}{port} ) {
-	    "-i $interfaceref->{bridge} -m physdev --physdev-in $interface ";
-	} else {
-	    "-i $interface ";
-	}
-    }    
-
-    #
-    # Match Dest device
-    #
-    sub match_dest_dev( $ ) {
-	my $interface = shift;
-	my $interfaceref =  $interfaces{$interface};
-	if ( $interfaceref->{options}{port} ) {
-	    "-o $interfaceref->{bridge} -m physdev --physdev-out $interface ";
-	} else {
-	    "-o $interface ";
-	}
-    }    
-
     #
     # Insert the passed exclusions at the front of the passed chain.
     #
@@ -1611,6 +1585,10 @@ sub generate_matrix() {
 		    next if ( %{ $zoneref->{interfaces} } < 2 ) && ! ( $zoneref->{options}{in_out}{routeback} || @$exclusions );
 		}
 
+		if ( $zone1ref->{type} eq 'bport4' ) {
+		    next unless $zoneref->{bridge} eq $zone1ref->{bridge};
+		}
+
 		if ( $chain =~ /2all$/ ) {
 		    if ( $chain ne $last_chain ) {
 			$last_chain = $chain;
@@ -1665,6 +1643,10 @@ sub generate_matrix() {
 		next ZONE1 if ( $num_ifaces = %{$zoneref->{interfaces}} ) < 2 && ! ( $zoneref->{options}{in_out}{routeback} || @$exclusions );
 	    }
 
+	    if ( $zone1ref->{type} eq 'bport4' ) {
+		next ZONE1 unless $zoneref->{bridge} eq $zone1ref->{bridge};
+	    }
+
 	    my $chainref    = $filter_table->{$chain};
 	    my $exclusions1 = $zone1ref->{exclusions};
 
diff --git a/Shorewall-perl/Shorewall/Zones.pm b/Shorewall-perl/Shorewall/Zones.pm
index 64f06a101..3257cc1e6 100644
--- a/Shorewall-perl/Shorewall/Zones.pm
+++ b/Shorewall-perl/Shorewall/Zones.pm
@@ -234,12 +234,6 @@ sub determine_zones()
 	    $zoneref->{type} = 'ipsec4';
 	} elsif ( $type =~ /^bport4?$/i ) {
 	    fatal_error "Bridge Port zones must have a single parent zone" unless @parents == 1;
-
-	    for my $p ( @parents ) {
-		my $interfaceref =  $interfaces{$1};
-		fatal_error "Parent Zone $p is not associated with device $1" unless $interfaceref && $interfaceref->{zone} eq $zone;
-	    }
-
 	    $zoneref->{type} = 'bport4';
 	    
 	} elsif ( $type eq 'firewall' ) {