diff --git a/firewall/firewall-add b/firewall/firewall-add
index c84b4b7..2a3a29d 100755
--- a/firewall/firewall-add
+++ b/firewall/firewall-add
@@ -54,12 +54,12 @@ if [[ "$NSENTER" == "true" ]] ; then
 		iptables="nsenter -t $(docker inspect --format {{.State.Pid}} $NAME) -n -- $IPTABLES -t nat";
 		
 		if [[ "$PREROUTING" == "true" ]] ; then
-			LINES=$($iptables --line-number -n | grep $COMMENT | awk '{print $1}'| tac)
+			LINES=$($iptables --line-number -n | grep $COMMENT | grep PREROUTING |awk '{print $1}'| tac)
 
 				# DELETE UNECESSARY LINES FROM PREVIOUS RULES
 				if [ -n "$LINES" ] ; then
 					for i in $LINES; do 
-						$iptables -D PREROUTING $i
+						$iptables -D $i
 						sleep 0.1
 					done
 				fi
@@ -67,12 +67,12 @@ if [[ "$NSENTER" == "true" ]] ; then
 			$iptables -I PREROUTING -d $SOURCE_IP -p $PROTOCOL --dport $SOURCE_PORT -m comment --comment "$COMMENT" -j DNAT --to $TARGET_IP:$TARGET_PORT
 			
 		elif [[ "$POSTROUTING" == "true" ]] ; then
-			LINES=$($iptables --line-number -n | grep $COMMENT | awk '{print $1}'| tac)
+			LINES=$($iptables --line-number -n | grep $COMMENT | grep POSTROUTING | awk '{print $1}'| tac)
 
 				# DELETE UNECESSARY LINES FROM PREVIOUS RULES
 				if [ -n "$LINES" ] ; then
 					for i in $LINES; do 
-						$iptables -D POSTROUTING $i
+						$iptables -D $i
 						sleep 0.1
 					done
 				fi