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HTTP 401 on WebAppl. with Kerberos Auth

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Hi all,

Trying to figure out how to get this working. A webapp (Topdesk) is published under the portal hostname. TopDesk has been setup with Kerberos Authentication. A SPN has been setup in TopDesk like this http/servername.domain

When i do a setspn -q http/servername.domain i get a big list of servers and services that are registered with a service account. That service account is only used for Kerberos auth, and has the option enabled to be delegated for authentication to any service (kerberos only).

I published the application and set it up for Kerberos Auth. When i logon to UAG portal and open the application i get a "You do not have permissions to view this folder or page".

The Webmonitor shows a Unable to reply to a HTTP 401 request.

Fiddler does not give any information.

I started a capture in Network Monitor and see some Kerberos v5 messages. 

First one: KerberosV5:TGS Request Realm: DOMAIN Sname: http/servername.domain
Second: KerberosV5:KRB_ERROR  - KDC_ERR_BADOPTION (13)

I am a little lost now on what i can do. But could this point to a situation where the Logon FORM of the application doesnt understand what UAG is trying to do with its LoginForm.xml? In other words, could this be that i have to make a custom Form? Or is the issue different, maybe one step before the FORM thingy?

I also checked TMG logging and saw some messages about a Kerberos Ticket being generated and delivered to me. After that the  401 message came in.

Thanks for the help!


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