Solved

SBs box detecting another SBS box and shutting services down.

Posted on 2011-02-25
4
779 Views
Last Modified: 2012-06-27
SBS 2003 server detects another SBS server and throws a paddy, but there isnt another SBS server on the network.
Does anyone know how it detects other SBS servers and how i can replicate it so I can locate the 'other SBS server' myself?

Details:
SBS 2003, SP2. Single NIC, All FMSO roles, DHCP, DNS.
192.168.1.x / 24 network behind a Netgear internet router.

Eventid 1011:
Multiple domain controllers running Windows Server 2003 for Small Business Server have been detected in your domain. To prevent this computer from shutting down in the future, you must remove all but one of these from the domain.
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
0
Comment
Question by:Steve
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 23

Expert Comment

by:ormerodrutter
ID: 34980172
Have you or anyone in some point in the past tried to add a SBS into the network?

In your case you will need to use Ntdsutil to remove orphan DC. Make sure you remove the right one.

http://www.pcreview.co.uk/forums/manually-removing-orphaned-child-domain-and-dc-issue-t2371308.html
http://support.microsoft.com/kb/555846
0
 
LVL 58

Expert Comment

by:Cliff Galiher
ID: 34983662
The error is a generic one actually generated by the licensing service. All it *really* means (despite what it says) is taht your server is no longer in licensing compliance. This usually means that one of the required roles (FSMO, GC) were transferred or lost from the SBS server. your standard AD tools )DCdiag, SBS BPA) will help you find out which role(s) are missing and resolve the situation.

-Cliff
0
 
LVL 27

Accepted Solution

by:
Steve earned 0 total points
ID: 34987051
as advised above there is and never has been another SBS on the network, and ALL FMSO roles were present and correct. Thanks for the help though.

After a bit of digging and testing I've worked it out.
It seems that the SBS checks any domains listed in it's DNS cache to see if it has any competition on the network.
This is quite clever as it means that if two systems reside on the same network and make even a single reference to each other it will be listed i the DNS cache and will be checked. On checking it will see ports open and be able to work out who the PDC is. If it's behind a router (eg on the internet) these ports will be closed and the server is happy it cannot see the other server.

In this case, some idiot had run Spybot on the server and had not been aware this adds a HUGE number of domains to the HOSTS file and points them all to 127.0.01.

While this is a basic way of stopping users/malware from accessing the sites, it also mean the server did it's usual checks on these domains listed in it's cache and ended up seeing itself, thinking it had competition and throwing a paddy..... (Proof that computers really are dumb...)

Deleted entries from hosts file and cleared cache and all is now fine. No other SBS boxes have been seen and the server is behaving itself again...Yey!
0
 
LVL 27

Author Closing Comment

by:Steve
ID: 35025084
Expert's comments were just reiterating items already advised in the original question.
Located the issue myself and may as well leave in knowledge base for others who may have the same issue.
0

Featured Post

Free NetCrunch network monitor licenses!

Only on Experts-Exchange: Sign-up for a free-trial and we'll send you your permanent license!

Here is what you get: 30 Nodes | Unlimited Sensors | No Time Restrictions | Absolutely FREE!

Act now. This offer ends July 14, 2017.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I've often see, or have been asked, the question about the difference between the Exchange 2010 SP1 version, available as part of Small Business Server (SBS) 2011, and the “normal” Exchange 2010 SP1 Standard. The answer to the question is relativ…
While rebooting windows server 2003 server , it's showing "active directory rebuilding indices please wait" at startup. It took a little while for this process to complete and once we logged on not all the services were started so another reboot is …
In this video, viewers will be given step by step instructions on adjusting mouse, pointer and cursor visibility in Microsoft Windows 10. The video seeks to educate those who are struggling with the new Windows 10 Graphical User Interface. Change Cu…
This is my first video review of Microsoft Bookings, I will be doing a part two with a bit more information, but wanted to get this out to you folks.

717 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