diff --git a/parental-control/files/etc/init.d/parentalcontrol b/parental-control/files/etc/init.d/parentalcontrol
index 72cbe5af1..bd90c0ac9 100755
--- a/parental-control/files/etc/init.d/parentalcontrol
+++ b/parental-control/files/etc/init.d/parentalcontrol
@@ -44,8 +44,10 @@ configure_fw_rules() {
 		else
 			# Now flush the existing connections, otherwise,
 			# URL filtering cannot be performed on already open sites.
-			if [ -n "$(which conntrack)" ]; then
-				sleep 5
+			if which hw_nat > /dev/null 2>&1; then
+				hw_nat -! > /dev/null 2>&1
+			fi
+			if which conntrack > /dev/null 2>&1; then
 				conntrack -F > /dev/null 2>&1
 			fi