One more thing I am using Samba, I could not use mskutil. Is there any issue with Kerberos and Samba. OS: Redhat EL6.2 squid-3.1 thanks, -----Original Message----- From: Markus Moeller [mailto:huaraz@xxxxxxxxxxxxxxxx] Sent: Sunday, June 24, 2012 2:59 PM To: squid-users@xxxxxxxxxxxxxxx Subject: Re: Squid Kerberos authentication error Can you check that the squid user has read access to the Kerberos keytab ? Did you set the environment variable KRB5_KTNAME pointing to the Kerberos keytab in the startup script ? Markus "Navas" <vmnavas@xxxxxxxxx> wrote in message news:000301cd51e5$7f9e64e0$7edb2ea0$@gmail.com... > Hi, > I am trying to setup squid to authenticate as AD with kerberos as per > the following document > > http://wiki.squid-cache.org/ConfigExamples/Authenticate/WindowsActiveD > irecto > ry > > but I am getting following error in cache log, > > authenticateNegotiateHandleReply: Error validating user via Negotiate. > Error > returned 'BH gss_acquire_cred() failed: Unspecified GSS failure. > Minor code may provide more information. Unknown error' > > appreciated for your kind help .. > > thanks, > > abusam > >