diff --git a/configure_NAT_from_RULES b/configure_NAT_from_RULES
index 7516f28..66aa34f 100755
--- a/configure_NAT_from_RULES
+++ b/configure_NAT_from_RULES
@@ -76,6 +76,18 @@ for rule in "${RULES[@]}"; do
     esac
 done
 
+case "$action" in
+    "up")
+        firewall-cmd --permanent --direct --add-rule ipv4 nat POSTROUTING 0 -o "$INTERFACE_SOURCE" -s "$FORWARD_TO_IP" -j SNAT --to-source "$ORIGINAL_DESTINATION_IP"
+        ;;
+    "down")
+        firewall-cmd --permanent --direct --remove-rule ipv4 nat POSTROUTING 0 -o "$INTERFACE_SOURCE" -s "$FORWARD_TO_IP" -j SNAT --to-source "$ORIGINAL_DESTINATION_IP"
+        ;;
+    *)
+        echo "Invalid action. Use 'up' or 'down'."
+        exit 1
+        ;;
+
 firewall-cmd --reload > /dev/null
 
 echo -e "\nDone! Don't forget to add/remove the rules in the security list."