I have tried this and it doesn't work. You can authenticate at the Squid server or pass the NTLM authentication on to the server, but you can't authenticate at both places. You would have to ask someone smarter then me why but I believe you are asking the client to authenticate twice and that just doesn't work. Jeff F> -----Original Message----- From: Phibee Network Operation Center [mailto:noc@xxxxxxxxxx] Sent: Wednesday, November 04, 2009 8:04 AM To: squid-users@xxxxxxxxxxxxxxx Subject: Auth NTLM ? Hi i have a small problems : My user use a NTLM authentification on my squid proxy, when he want going on a web site that request a authentification, he receive a Authentification Faild without a user/pass request if he don't put the proxy, the web site request the login/pass and that's work. Anyone have a idea why ? Does squid sent the l/p of the first ntlm auth at the second server automatiquely ? thanks Jerome *** The information in this e-mail is confidential and intended solely for the individual or entity to whom it is addressed. If you have received this e-mail in error please notify the sender by return e-mail delete this e-mail and refrain from any disclosure or action based on the information. ***