Ollie, Your "how to" done the trick! Thanks. I've Googled high and low and never found this for dhcp on port 1067. Before I always had to do; ' DHCPORT="1067" ' & ' prog = dhcpd -p $DHCPORT ' ,,,which no longer works... I'm now nmapping fine on port 1067 ,,,:-) Thanks again, Barry Cisna