DOCUMENT:Q182281  09-AUG-2001  [winnt]
TITLE   :Remote Access Service Callback Authentication Does Not Work
PRODUCT :Microsoft Windows NT
PROD/VER:WINNT:3.5,3.51,4.0
OPER/SYS:
KEYWORDS:kb3rdparty kbhw kbnetwork kbHardware

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The information in this article applies to:

 - Microsoft Windows NT Workstation versions 3.5, 3.51, 4.0 
 - Microsoft Windows NT Server versions 3.5, 3.51, 4.0 
 - Microsoft Windows NT Server, Enterprise Edition version 4.0 
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SYMPTOMS
========

Callback authentication may not work with Windows NT-based Remote Access Service
(RAS) servers when you attempt to connect to a Shiva LanRover Access Switch
version 4.5 or an IBM 8235 Remote Access Server.


CAUSE
=====

This behavior can occur with remote access devices that do not support the
Microsoft Call Back Challenge Protocol (CBCP) for callback authentication.

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

The Shiva LanRover Access Switch version 4.5 and the IBM 8235 Remote Access
Server use Shiva's proprietary Shiva Password Authentication Protocol (SPAP) for
callback authentication and do not support CBCP. Contact the manufacturer for
more information.

For information about how to contact Shiva or IBM, query in the Knowledge Base
for one of the following articles:

   ARTICLE-ID: Q65416
   TITLE : Hardware and Software Third-Party Vendor Contact List, A-K

   ARTICLE-ID: Q60781
   TITLE : Hardware and Software Third-Party Vendor Contact List, L-P

   ARTICLE-ID: Q60782
   TITLE : Hardware and Software Third-Party Vendor Contact List, Q-Z


The third-party products discussed here are manufactured by vendors independent
of Microsoft; we make no warranty, implied or otherwise, regarding these
products' performance or reliability.

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Keywords          : kb3rdparty kbhw kbnetwork kbHardware 
Technology        : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT351search kbWinNT350search kbWinNT400search kbWinNTW350 kbWinNTW350search kbWinNTW351search kbWinNTW351 kbWinNTSsearch kbWinNTSEntSearch kbWinNTSEnt400 kbWinNTS400search kbWinNTS400 kbWinNTS351 kbWinNTS350 kbWinNTS351search kbWinNTS350search
Version           : WINNT:3.5,3.51,4.0
Issue type        : kbprb

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