Solved

Kerbros failng when using FQDN

Posted on 2011-02-18
3
321 Views
Last Modified: 2012-05-11
While using FQDN kerbros fails to authenicate a user when opening c$ share on a Windows 7 Machine.  The machines in question are members of domain yyy.zzz the machines authenicate when the machine_name.yyy.zzz is called.  But does not when the FQDN is changes to machine_name.FFF.TTT.yyy.zzz.  DNS has both entires in there tables.  We have it this way for software development and when we deploy the machines to another environment.  The error we are receiving is KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN.  The Domain is running in Windows 2008 mod of operations.
0
Comment
Question by:copenjs
  • 2
3 Comments
 
LVL 8

Accepted Solution

by:
Toxacon earned 500 total points
ID: 34931867
Windows Kerberos is bound to the domain name yyy.zzz, not to the DNS name of the computer. DNS is only for name resolution, not for authentication. Kerberos is for authentication and it authenticates only on the specified realm which is the domain DNS name (yyy.zzz). For Kerberos, fff.ttt.yyy.zzz is a "foreigner" and it has no idea on realm list where that realm could be, so the Principal is unknown.
0
 

Author Comment

by:copenjs
ID: 34942436
Thanks for the clarificaiton. Do you know if there is a way to associate the canonical name with the active directory name so that the canonical name will authenticate?
0
 
LVL 8

Expert Comment

by:Toxacon
ID: 34943741
Umm, I'm not sure if I understood the question correctly as the canonicalName in AD will always reflect the actual name in the object, in this case, the computer name.
0

Featured Post

6 Surprising Benefits of Threat Intelligence

All sorts of threat intelligence is available on the web. Intelligence you can learn from, and use to anticipate and prepare for future attacks.

Join & Write a Comment

Hallo! I guess almost every Windows Administrator must have got stumped with this question "Where does WINDOWS store a users cached credentials? Every user who had once logged onto a Server/Desktop while it was connected to the domain could sti…
Introduction: I have always been a big fan of Windows but my liking towards it is slowly being eroded by the variety of other Applications that I encounter, when I browse the Web. Most of the software available is free and maybe Open Source too. …
In this video, we discuss why the need for additional vertical screen space has become more important in recent years, namely, due to the transition in the marketplace of 4x3 computer screens to 16x9 and 16x10 screens (so-called widescreen format). …
With the advent of Windows 10, Microsoft is pushing a Get Windows 10 icon into the notification area (system tray) of qualifying computers. There are many reasons for wanting to remove this icon. This two-part Experts Exchange video Micro Tutorial s…

743 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

11 Experts available now in Live!

Get 1:1 Help Now