Hi, I thought this was a bit familiar. You may want to look at: http://www.squid-cache.org/mail-archive/squid-users/200508/0168.html and http://www.squid-cache.org/mail-archive/squid-users/200508/0170.html John. -- --------------------------------------------------------------- John Horne, University of Plymouth, UK Tel: +44 (0)1752 233914 E-mail: John.Horne@xxxxxxxxxxxxxx Fax: +44 (0)1752 233839