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02.04.2008 at 09:08AM PST, ID: 23135387
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Attachment Details

Can't resolve UDP port 137 queries

Asked by MarketingDrive in Internet Protocols, Network Analysis Software

Tags: UDP Port 137 NetBIOS DNS

I'm hoping someone can help here. We transitioned from one network to a new one last year when we were sold off. We built the network from scratch. However, since I've been monitoring network traffic I'm seeing an inordinate amount of UDP traffic over port 137 coming from a variety of machines going to our old network IP scheme.

Here's what I've checked:
DHCP, AD and DNS servers: no DNS entries of old IP scheme, no NetBIOS entries of old network.
Old printers: all printers and printer ports mapped to old IP scheme have been removed
Flushed DNS cache
Ran WireShark to confirm NBNS queries
Looked for HOST files/LMHOSTS files - none show any entries

I'm out of ideas what to try or look for. I'm seeing this traffic being generated from a variety of machines on our network, so I'm pretty sure these queries are all coming from the same cause. If I can nail it down on one machine, I'm sure it will fix the problem on all.

PS: I've also done a search on EE and none of the answers to questions similar to mine helped. :)Start Free Trial
[+][-]02.04.2008 at 09:25PM PST, ID: 20820830

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[+][-]02.05.2008 at 07:15AM PST, ID: 20823520

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[+][-]02.05.2008 at 12:23PM PST, ID: 20826489

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[+][-]02.13.2008 at 11:35AM PST, ID: 20887299

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About this solution

Zones: Internet Protocols, Network Analysis Software
Tags: UDP Port 137 NetBIOS DNS
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Solution Provided By: dkarpekin
Participating Experts: 2
Solution Grade: A
 
 
[+][-]02.13.2008 at 11:43AM PST, ID: 20887379

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