diff --git a/repos/libports/run/nic_router.run b/repos/libports/run/nic_router.run
index d1e2c1520a..800ae33f0d 100644
--- a/repos/libports/run/nic_router.run
+++ b/repos/libports/run/nic_router.run
@@ -8,7 +8,8 @@ proc enable_test_3 { } { return 1 }
 proc enable_test_4 { } { return 1 }
 proc enable_test_5 { } { return 1 }
 proc enable_test_6 { } { return 1 }
-proc nr_of_clients { } { return 6 }
+proc enable_test_7 { } { return 0 }
+proc nr_of_clients { } { return 7 }
 
 source ${genode_dir}/repos/libports/run/nic_router.inc
 
@@ -18,8 +19,9 @@ create_boot_directory
 
 proc test_1_config { } {
 	if {[enable_test_1]} { return "
-		[client_config udp_client_1 udp 10.0.98.55 10.0.98.33 255.255.255.0 nic_router 1337 10.0.98.33]
-		[server_config udp_server_1 udp 10.0.99.55 10.0.99.33 255.255.255.0 nic_router 1337 ]" }
+		[client_config       udp_client_1 udp 10.0.98.55 10.0.98.33 255.255.255.0 nic_router 1337 10.0.98.33]
+		[client_config lan_1_udp_client_1 udp 10.0.99.56 10.0.99.33 255.255.255.0 nic_router 1337 10.0.99.55]
+		[server_config lan_1_udp_server_1 udp 10.0.99.55 10.0.99.33 255.255.255.0 nic_router 1337 ]" }
 }
 
 proc test_2_config { } {
@@ -52,6 +54,15 @@ proc test_6_config { } {
 		[server_config http_server_3 http 10.0.2.203    10.0.2.1    255.255.255.0 nic_bridge 2345 ]" }
 }
 
+proc test_7_config { } {
+	if {[enable_test_7]} { return "
+		[client_config lan_2_client_1 http 100.200.0.128 100.200.0.1 255.255.0.0   nic_router 2345 10.0.2.204]
+		[client_config lan_2_client_2 http 100.200.0.64  100.200.0.1 255.255.0.0   nic_router 3456 10.0.2.240]
+		[client_config lan_2_client_3 http 100.200.0.32  100.200.0.1 255.255.0.0   nic_router 3456 10.0.2.240]
+		[server_config lan_3_server_1 http 10.0.2.204    10.0.2.1    255.255.255.0 nic_router 2345 ]
+		[server_config lan_3_server_2 http 10.0.2.240    10.0.2.1    255.255.255.0 nic_router 3456 ]" }
+}
+
 append config {
 <config prio_levels="2">
 	<parent-provides>
@@ -98,7 +109,7 @@ append config {
 			<policy label_prefix="udp_client_3"  domain="udp_client_3"  />
 			<policy label_prefix="http_server_1" domain="http_server_1" />
 			<policy label_prefix="http_server_2" domain="http_server_2" />
-			<policy label_prefix="udp_server_1"  domain="udp_server_1"  />
+			<policy label_prefix="lan_1"         domain="lan_1"  />
 			<policy label_prefix="udp_server_2"  domain="udp_server_2"  />
 
 			<domain name="uplink" interface="10.0.2.55/24" gateway="10.0.2.1">
@@ -110,7 +121,7 @@ append config {
 			</domain>
 
 			<domain name="udp_client_1" interface="10.0.98.33/24">
-				<udp-forward port="1337" domain="udp_server_1" to="10.0.99.55" />
+				<udp-forward port="1337" domain="lan_1" to="10.0.99.55" />
 			</domain>
 
 			<domain name="http_client_3" interface="100.200.0.1/24">
@@ -125,9 +136,23 @@ append config {
 
 			<domain name="http_server_1" interface="192.168.1.1/24" />
 			<domain name="http_server_2" interface="192.168.2.1/24" />
-			<domain name="udp_server_1"  interface="10.0.99.33/24"  />
+			<domain name="lan_1"         interface="10.0.99.33/24"  />
 			<domain name="udp_server_2"  interface="18.17.16.14/24" />
 
+			<policy label_prefix="lan_2" domain="lan_2" />
+			<policy label_prefix="lan_3" domain="lan_3" />
+
+			<domain name="lan_2" interface="100.200.0.1/24">
+				<tcp dst="10.0.0.0/16">
+					<permit port="2345" domain="lan_3" />
+					<permit port="3456" domain="lan_3" />
+				</tcp>
+			</domain>
+
+			<domain name="lan_3" interface="10.0.2.1/24">
+				<nat domain="lan_2" tcp-ports="18" />
+			</domain>
+
 		</config>
 		<route>
 			<service name="Nic"> <child name="nic_bridge"/> </service>
@@ -158,6 +183,7 @@ append config {
 	} [test_4_config] {
 	} [test_5_config] {
 	} [test_6_config] {
+	} [test_7_config] {
 
 </config> }