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NetBios name requests: Which service or application is sending them?

Medium Priority
207 Views
Last Modified: 2010-03-18
Hi!

I have a problem: It all started when the IT services removed an old server from the net. Whenever one tries to open a simple text file or anything or right click some file or folder on whatever drive as e.g. C: or even the USB stick it takes more than 20 seconds till that action happens. Using a network protocol analyzer I found out that after the mouse event there are sent a number of name request via DNS and NetBios regarding that old server. When all of them returned an error after 20 seconds the chosen action is finally executed.

When I switch off NetBios over TCP/IP then opening files works without delay as it should. But this is probably not a clean solution since something in the background will still ask for the old server.

How can I find the application or service which is initiating the name requests so that I can change its settings?

I looked already for network drives but all the drives I can find are working correctly. It is also strange that the name requests are send no matter what file on what drive I try to access.

Since a lot of computers in our office have this problem and our IT services left us alone with this saying they can't find any problem, I would appreciate your help.

Thanks a million in advance!
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Fatal_ExceptionSystems Engineer
Top Expert 2005

Commented:
Try flushing and refreshing the Browser Cache and DNS cache..

nbtstat -RR

ipconfig /flushdns
ipconfig /registerdns

Author

Commented:
Thanks for the suggestion!

I am not in my office right now but I will definitely try that later.

But shouldn't that happen automatically after shutting down Windows normally? This situation is enduring since over half a year already and I assume almost 20 PCs are affected so that it seems strange if old cashes are persisting for such a long time in so many PCs.
Fatal_ExceptionSystems Engineer
Top Expert 2005

Commented:
Yes, it should, but try this as a first step to verify...  :)

Author

Commented:
Flushing those too cashes did not help. Any other suggestions?
Fatal_ExceptionSystems Engineer
Top Expert 2005

Commented:
Somewhere there is a lingering reference to that old server..  are you running a WINs server?  If so, ck it..

BTW:  turning off Netbios should not affect your PCs..  It is an older technology that is not necessary if you are running a DNS server...

Author

Commented:
Sorry, I neglected some "harmless" links in the registry: There were some file associations set to executables on the old server. Correcting these links solved the problem.

Thanks for your helpful comments!
Fatal_ExceptionSystems Engineer
Top Expert 2005

Commented:
:)
PAQed with points refunded (250)

Computer101
EE Admin

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