DOCUMENT:Q193987  20-OCT-2000  [sna]
TITLE   :Win95 Client May Trap When Client/Server Encryption is Enabled.
PRODUCT :Microsoft SNA Server
PROD/VER:WINDOWS:4.0,4.0 SP1
OPER/SYS:
KEYWORDS:kbfixlist

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The information in this article applies to:

 - Microsoft SNA Server, versions 4.0, 4.0 SP1 
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SYMPTOMS
========

SNA Server Windows 95 clients that connect to an SNA Server from a non- trusted
Windows NT domain may generate an access violation in Snakrnl.dll if the SNA
Server is configured to support data encryption for the Everyone group. This
problem has been observed when starting the SNA Server Win3270 tool, which led
to the following error message being displayed:

   WIN3270 caused an invalid page fault in module Snakrnl.dll at 0137:620867e7.

This problem may occur when running the SNA Server Windows 95 client on Windows
95, Windows 98, or Windows NT.

CAUSE
=====

Data encryption is not supported across non-trusted Windows NT domains. If the
decryption fails, the received data will be processed as a good message, which
causes an access violation in Snakrnl.dll.

RESOLUTION
==========

Microsoft has confirmed this to be a problem in SNA Server versions 4.0 and 4.0
Service Pack 1. This problem was corrected in the latest SNA Server version 4.0
U.S. Service Pack. For information on obtaining this Service Pack, query on the
following word in the Microsoft Knowledge Base (without the spaces):

   S E R V P A C K


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

The updated causes the client connection to be closed. In addition, the
following error message is displayed, "ERROR - Reading SNA Server
Configuration", rather than generating an access violation.

Additional query words:

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Keywords          :  kbfixlist
Technology        : kbAudDeveloper kbSNAServSearch kbSNAServ400 kbSNAServ400SP1
Version           : WINDOWS:4.0,4.0 SP1
Issue type        : kbbug
Solution Type     : kbfix

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