Squid 2.5 S7 usese a Bluecoat as parent proxy. Sometimes Bluecoat gives access-denied errors and all further requests of the user are denied. A Bluecoat administrator posted this problem in the appropiate list: http://forums.bluecoat.com/viewtopic.php?p=382#382 Now there is the question: What auth mode are you using? Sounds like squid has a persistent single connection to ProxySG. ProxySG will remember that that session was authenticated as a specific user, and subsequent requests on that same TCP connection would be considered authenticated from that first user. Any hints? Mit freundlichem Gruß/Yours sincerely Werner Rost GMT-FIR - Netzwerk ZF Boge Elastmetall GmbH Friesdorfer Str. 175, 53175 Bonn, Deutschland/Germany Telefon/Phone +49 228 3825 - 420 Telefax/Fax +49 228 3825 - 398 werner.rost@xxxxxx