Hello List, Can someone please point me to a resource describing what an external acl program must return and how. In my quest to "bind" an IP to a username I have created the following: ip_to_user.sh #!/bin/bash while [ 1 ] do while read ip do ip_done="0"; echo "Auth'ing $ip..." >> /var/log/ip_to_user.log if [ $ip = "1.2.3.4" ]; then echo "OK user=user" echo "OK user=user" >> /var/log/ip_to_user.log ip_done="1"; fi done done That seems to work, but at some stage all 5 of them use 100% CPU - even when they are not auth'ing. Did I miss something ? Thanks, Pieter ?This e-mail is sent on the Terms and Conditions that can be accessed by Clicking on this link http://www.vodacom.net/legal/email.aspx "