Re: [squid-users] Re: Kerberos with LDAP authentication failover and iTunes auth problems

From: Brett Lymn <>
Date: Wed, 28 Dec 2011 16:57:59 +1030

On Wed, Dec 28, 2011 at 05:23:55PM +1100, James Robertson wrote:
> Because I implemented Kerberos first I already had a machine account
> in Active Directory that was created by the msktutil utility.
> When I researched implementing ntlm_auth the documentation mentions
> joining the computer to AD using "net ads join". This was an issue
> because I already had the computer account and didn't want to hose
> anything that the Negotiate/Kerberos might use and researched how to
> use a pre-existing computer account in AD but could not find anything,
> so in the end I just ran it (which worked). However after I did this
> Negotiate/Kerberos was broken. I fixed it by resetting the computer
> account and running "msktutil --auto-update" to update the computer
> accounts password. NTLM still worked after this.

Don't use the machine account for the kerberos SPN if you also want to
use NTLM. Create a new user account and use that for generating the
kerberos keytab, this allows you to use NTLM as well without the creds
getting stomped.

Brett Lymn
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Received on Wed Dec 28 2011 - 06:28:11 MST

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