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Q160828: Network Monitor Parses DNS WINS Lookup Queries as DNS Packets

Article: Q160828
Product(s): Microsoft Windows NT
Version(s): WinNT:4.0
Operating System(s): 
Keyword(s): kbnetwork
Last Modified: 10-AUG-2001

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The information in this article applies to:

- Microsoft Windows NT Workstation version 4.0 
- Microsoft Windows NT Server version 4.0 
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SYMPTOMS
========

If you use Network Monitor to capture a trace of the Microsoft Domain Name
Service (DNS) server doing a WINS lookup and display the capture, the Protocol
column will say DNS even when the packet being sent to the WINS server is a
NetBT packet destined for port 137.

CAUSE
=====

Network Monitor parses DNS WINS Lookup packets as if they were DNS protocol
packets. These are actually NetBT packets and should be parsed as such.

STATUS
======

Microsoft has confirmed this to be a problem in Windows NT Server version 4.0.
We are researching this problem and will post new information here in the
Microsoft Knowledge Base as it becomes available.

MORE INFORMATION
================

The capture will display the WINS Lookup name query as:

  + UDP: Src Port: DNS, (53); Dst Port: NETBIOS Name Service (137); Length
  = 58 (0x3A)
  + DNS: 0x8002:Std Qry for EKEFFCEJEDEPDECACACACACACACACAAA. of type
  Unknown Type

You would expect to see the following:

  + UDP: Src Port: DNS, (53); Dst Port: NETBIOS Name Service (137); Length
  = 58 (0x3A)
  + NBT: NS: Query req. for COMPUTER1

Additional query words: netmon
======================================================================
Keywords          : kbnetwork 
Technology        : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT400search kbWinNTSsearch kbWinNTS400search kbWinNTS400
Version           : WinNT:4.0

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