Kerberos not being used, only NTLM - Login failed for user '(null)'

[DougM]

We have a Win2K3 Server running an ASP .NET application that connects
to a Win2K3 server running SQL 2000 on the backend.

Whenever a user opens the application page in their client browser
they get the error message:
"The following error occurred whilst loading the page: Login failed
for user '(null)'. Reason: Not associated with a trusted SQL Server
connection."

We have been through all the newsgroups, the Microsoft
"Troubleshooting Kerberos Delegation" whitepaper, the Microsoft
"Troubleshooting Kerberos Errors" whitepaper and it appears as though
Kerberos has been turned off for IIS on this middle tier server. When
a client connects it doesn't even attempt Kerberos authentication but
immediately authenticates with NTLM, which explains the login failure
for user '(null)' error. What we can't work out is why Kerberos isn't
even attempted.

Thanks in advance,
Doug.

[Ken Schaefer]

See responses in microsoft.public.inetserver.iis.security

Cheers
Ken


"DougM" <doogie_of_oz@hotmail.com> wrote in message
news:68ac046a.0409212310.68071ac9@posting.google.c om...

> We have a Win2K3 Server running an ASP .NET application that connects
> to a Win2K3 server running SQL 2000 on the backend.
>
> Whenever a user opens the application page in their client browser
> they get the error message:
> "The following error occurred whilst loading the page: Login failed
> for user '(null)'. Reason: Not associated with a trusted SQL Server
> connection."
>
> We have been through all the newsgroups, the Microsoft
> "Troubleshooting Kerberos Delegation" whitepaper, the Microsoft
> "Troubleshooting Kerberos Errors" whitepaper and it appears as though
> Kerberos has been turned off for IIS on this middle tier server. When
> a client connects it doesn't even attempt Kerberos authentication but
> immediately authenticates with NTLM, which explains the login failure
> for user '(null)' error. What we can't work out is why Kerberos isn't
> even attempted.
>
> Thanks in advance,
> Doug.