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Q164987: Hard-Coded Socket of 451 Causes LANtegrity Software to Fail

Article: Q164987
Product(s): Microsoft Windows NT
Version(s): winnt:4.0
Operating System(s): 
Keyword(s): kbbuglist kbfixlist
Last Modified: 09-AUG-2001

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The information in this article applies to:

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

A Microsoft Windows NT client for NetWare fails to connect to a LANtegrity
server.

CAUSE
=====

LANtegrity is a process that runs on a Novell NetWare server, which enables a
NetWare server to automatically take over for any down or failed NetWare server
in a network.

When a LANtegrity Server stands in for a down server, it advertises (SAPs) itself
under the name of the down server as providing its file and print services.
Thereafter, the LANtegrity server responds to any login requests directed to the
down server.

A Windows NT client for NetWare correctly locates the new server address, but,
because Windows NT is hard-coded to socket 0x451, it connects to the wrong
socket. This proves to be a problem when LANtegrity stands in for a NetWare
server, because LANtegrity allocates a dynamic IPX address for the server it is
standing in for.

  Bad.cap:

- Client --> "Read Property Value" request for DTW4 (a server LANtegrity is
  standing in for)

- Server <-- "Read Property Value" response. This contains the IPX address
  (10123:1:4007)

- Client --> "Connect Request" going to IPX address 10123:1:451 (the wrong
  socket number)

Note that the client finds the correct network/node number, but uses the fixed
NCP socket of 0x451.

RESOLUTION
==========

Obtain the fix referenced below, which contains an updated Nwrdr.sys driver.

STATUS
======

Microsoft has confirmed this to be a problem in Windows NT version 4.0. This
problem was corrected in the latest Microsoft Windows NT 4.0 U.S. Service Pack.
For information on obtaining the service pack, query on the following word in
the Microsoft Knowledge Base (without the spaces):

  S E R V P A C K


Additional query words: prodnt LANtegrity

======================================================================
Keywords          :  kbbuglist kbfixlist
Technology        : kbWinNTsearch kbWinNT400search kbWinNTSsearch kbWinNTS400search kbWinNTS400
Version           : winnt:4.0
Issue type        : kbbug

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