RAS Authentication Rechallenge Resets Compression Flag

 Last reviewed: November 19, 1997
Article ID: Q176502
The information in this article applies to:
  • Microsoft Windows NT Server version 4.0
  • Routing and Remote Access Service Update for Windows NT Server 4.0

SYMPTOMS

When you are connected to a Remote Access Service (RAS) server with either a Windows NT RAS Client or a Windows NT Routing and Remote Access Service (RRAS) Client that is using software compression, the compression flag may get reset. This will cause the RAS server to discard any packets from your RAS or RRAS Client.

CAUSE

The RAS server rechallenged the client's authentication by issuing an LCPConfigRequest after the connection has been established. During this reauthentication, the compression flag is reset so that the server thinks the client is not using compression; however, the client is still sending compressed data.

RESOLUTION

Obtain the following fix or wait for the next Windows NT service pack.

This fix should have the following timestamp: 

   10/23/97  07:55 PM                27,408 Raschap.dll (Intel)
   10/23/97  07:52 PM                45,328 Raschap.dll (Alpha)
NOTE: Service Pack 3 must be applied to Windows NT 4.0 prior to applying this fix.

STATUS

Microsoft has confirmed this to be a problem in Windows NT version 4.0. A supported fix is now available, but has not been fully regression tested and should be applied only to systems experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft recommends that you wait for the next Service Pack that contains this fix. Contact Microsoft Technical Support for more information.

Microsoft has confirmed this to be a problem in Routing and Remote Access Update for 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. 

Keywords          : kbbug4.00.sp3 kbfix4.00 ntnetserv NTRAS ntrouter NTSrv kbinterop kbnetwork kbbuglist
Version           : WinNT:4.0
Platform          : winnt
Issue type        : kbbug
Solution Type     : kbfix

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Last reviewed: November 19, 1997
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