I have read the thread advised by you however i dont think that it is related to my environment (Active directory with parent&child domains having full trust two ways between each with a Single Squid Server and not a cluster). So i think that registering SPN on a single domain should work. And as i said that previously in my test environments i have tested it many a times and it works. If you you could explain in detail then i may get better idea about what u mean. regards, Bilal ---------------------------------------- > Date: Mon, 28 Jun 2010 10:34:07 +0200 > From: e.lesouef@xxxxxxx > To: squid-users@xxxxxxxxxxxxxxx > Subject: Re: squid_kerb_auth (parseNegTokenInit failed with rc=102) > > Hi, > > I think you might be interested by this thread : > > http://www.squid-cache.org/mail-archive/squid-users/201006/0128.html > > Le Mon, 28 Jun 2010 07:57:38 +0000, > "GIGO ." a écrit : > >> >> Hi all, >> >> I am unable to do kerberos authentication in my live enviroment as >> appose to the test enviroment where it was successful. My environment >> is Active Direcory Single Forest Multidomain with each domain having >> multiple domain controllers. >> > > -- > Emmanuel Lesouef _________________________________________________________________ Hotmail: Free, trusted and rich email service. https://signup.live.com/signup.aspx?id=60969