diff --git a/Shorewall6/shorewall6.conf b/Shorewall6/shorewall6.conf
index f2f073530..ae414dea1 100644
--- a/Shorewall6/shorewall6.conf
+++ b/Shorewall6/shorewall6.conf
@@ -179,6 +179,8 @@ ZONE2ZONE=2
 
 BLACKLIST_DISPOSITION=DROP
 
+MACLIST_DISPOSITION=REJECT
+
 SFILTER_DISPOSITION=DROP
 
 SMURF_DISPOSITION=DROP