Hi, In my experience, I came across the problem when Windows clients access files on Windows servers (e.g. IIS, SharePoint, etc.) and the server kept prompting user to enter user id and password. Amos is right and my problem was with NTLM authentication. I solved the problem with Squid version, e.g. 2.6 or 3.1, that supports connection pinning :- http://wiki.squid-cache.org/Features/ConnPin Regards, John Mok _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx http://lists.squid-cache.org/listinfo/squid-users