diff --git a/Samples6/three-interfaces/interfaces b/Samples6/three-interfaces/interfaces
index 588ba3955..7bf0d2855 100644
--- a/Samples6/three-interfaces/interfaces
+++ b/Samples6/three-interfaces/interfaces
@@ -12,6 +12,6 @@
 # For information about entries in this file, type "man shorewall6-interfaces"
 ###############################################################################
 #ZONE	INTERFACE	BROADCAST	OPTIONS
-net     eth0            detect          tcpflags
-loc     eth1            detect          tcpflags
-dmz     eth2            detect
+net     eth0            detect          tcpflags,forward=1
+loc     eth1            detect          tcpflags,forward=1
+dmz     eth2            detect		tcpflags,forward=1
diff --git a/Samples6/two-interfaces/interfaces b/Samples6/two-interfaces/interfaces
index fb7662159..6641eb4b6 100644
--- a/Samples6/two-interfaces/interfaces
+++ b/Samples6/two-interfaces/interfaces
@@ -12,5 +12,5 @@
 # For information about entries in this file, type "man shorewall6-interfaces"
 ###############################################################################
 #ZONE	INTERFACE	BROADCAST	OPTIONS
-net     eth0            detect          tcpflags
-loc     eth1            detect          tcpflags
+net     eth0            detect          tcpflags,forward=1
+loc     eth1            detect          tcpflags,forward=1