diff -ru ipkungfu-0.6.1.orig/ipkungfu.in ipkungfu-0.6.1/ipkungfu.in
--- ipkungfu-0.6.1.orig/ipkungfu.in	2007-01-22 04:47:04.000000000 +0100
+++ ipkungfu-0.6.1/ipkungfu.in	2007-07-04 12:49:23.000000000 +0200
@@ -753,11 +753,15 @@
 fi
 
 function delTestChain {
-# {{{ Flush and delete test chains
-	$IPTABLES -t filter -F SYSTEST
-	$IPTABLES -t filter -X SYSTEST
-	$IPTABLES -t mangle -F SYSTEST
-	$IPTABLES -t mangle -X SYSTEST
+# {{{ Flush and delete test chains, if exist
+	if $IPTABLES -t filter -L SYSTEST > /dev/null 2>&1 ; then
+		$IPTABLES -t filter -F SYSTEST
+		$IPTABLES -t filter -X SYSTEST
+	fi
+	if $IPTABLES -t mangle -L SYSTEST > /dev/null 2>&1 ; then
+		$IPTABLES -t mangle -F SYSTEST
+		$IPTABLES -t mangle -X SYSTEST
+	fi
 # }}}
 }