How do i configure Kerberos authentication for a website alias (Host (A) entry in dns)

Hey,

Have you tried disabling strict name checking on the server?

This article isn't entirely relevant. But it does describe how to turn it off well enough:

http://support.microsoft.com/kb/281308

Presumably you enabled Kerberos Delegation on the server account?

HTH

Chris

Hi,

Thanks for the info, looks like this might help as i do get the system erro 52 if i do "net view intranet". I will reboot the server tonight and see if this solves the issue.

I had already enabled kerberos delegation on the server account.

Thanks

Anthony

Hi Chris,

This didn't solve the problem. I am still getting the anonymous logon error when using the alias.

Any other ideas?

Anthony

Well that's annoying...

The site is appearing on Internet Explorer as an Intranet Site isn't it?

Chris

Yeah i have added it to the local intranet sites list and "logon with current username and password" is selected in the security options.

Anthony

Is it showing logon failures in the Security log at all (on the server)? That is, is it attempting and failing?

The only other thing I can think of at the moment is blocking anonymous access to that portion of the site.

I'll have a look around for other bits. Got to finish off a bit of my own application that intends to operate in the same way as this.

Chris

This is what i get for each address

http://intranet.domain.com/hr

Successful Network Logon:
       User Name:      USERNAME
       Domain:            DOMAIN
       Logon ID:            (0x0,0x9EE35E)
       Logon Type:      3
       Logon Process:      NtLmSsp
       Authentication Package:      NTLM       
       Logon GUID:      -
       Caller User Name:      -
       Caller Domain:      -
       Caller Logon ID:      -
       Caller Process ID: -
       Transited Services: -

http://webserver.domain.com/hr

Description:
Successful Network Logon:
       User Name:      USERNAME
       Domain:            DOMAIN
       Logon ID:            (0x0,0x9E73D9)
       Logon Type:      3
       Logon Process:      Kerberos
       Authentication Package:      Kerberos       
       Logon GUID:      {13fa1301-ce28-0bbb-fab6-d6eccd89a9e7}
       Caller User Name:      -
       Caller Domain:      -
       Caller Logon ID:      -
       Caller Process ID: -
       Transited Services: -

It uses NTLM for the alias but kerberos for webserver name.

Okay that makes sense then.

Can we just verify those Service Principal Names again.

Is this really how the SPN entries appear?

HTTP/intranet webserver
HTTP/intranet.domain.com webserver

What command did you use to add those?

Using SetSPN like this:

setspn -a HTTP/intranet webserver

Should have given you:

HTTP/intranet

Which the client uses to locate a server to send a Kerberos Ticket to.

Chris

These are all the spn's that are setup for the webserver.

HOST/webserver
HOST/webserver.domain.com
HTTP/intranet webserver
HTTP/intranet.domain.com
MSOLAPSvc/webserver
MSOLAPSvc/webserver.domain.com

Im not sure what the bottom 2 are for as i didn't put them there. The two HTTP entries I added manually using adsiedit.msc.

Anthony

that should have been HTTP/intranet.domain.com webserver

Your a star.

Works like a charm now.

Thanks for sticking with me.

Anthony

You're welcome, glad we got there in the end :)

Chris