diff --git a/web-splash/web-splash-functions.inc b/web-splash/web-splash-functions.inc
index e6a4d1a..4aea67b 100644
--- a/web-splash/web-splash-functions.inc
+++ b/web-splash/web-splash-functions.inc
@@ -91,14 +91,20 @@ get_IP_list()
 register_IP()
 # add a new allowed IP
 {
-	eval `echo "$RULE_ADD" | sed "s/_IP_/$1/g"`
+	if get_IP_list | grep -q "^$1$"
+		then	echo "die IP $1 war bereits freigeschaltet!"
+		else	eval `echo "$RULE_ADD" | sed "s/_IP_/$1/g"`
+	  fi
 }
 
 
 unregister_IP()
 # remove the specified IP
 {
-	eval `echo "$RULE_DEL" | sed "s/_IP_/$1/g"`
+	if get_IP_list | grep -q "^$1$"
+		then	eval `echo "$RULE_DEL" | sed "s/_IP_/$1/g"`
+		else	echo "die IP $1 war nicht freigeschaltet!"
+	  fi
 }