RAS Authentication Rechallenge Resets Compression Flag

• Microsoft Windows NT Server version 4.0
• Microsoft Routing & Remote Access Service Update for Windows NT Server version 4.0
• Microsoft Windows NT Server version 4.0, Terminal Server Edition

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

To resolve this problem, obtain the latest service pack for Windows NT 4.0 or Windows NT Server 4.0, Terminal Server Edition. For additional information, please see the following article in the Microsoft Knowledge Base:

Q152734 How to Obtain the Latest Windows NT 4.0 Service Pack

STATUS

Microsoft has confirmed this to be a problem in Windows NT 4.0 and Windows NT Server 4.0, Terminal Server Edition. This problem was first corrected in Windows NT 4.0 Service Pack 4.0 and Windows NT Server 4.0, Terminal Server Edition Service Pack 4.

Keywords : kbinterop kbnetwork NT4SP4Fix ntras ntnetserv kbfix4.00.sp4 kbbug4.00.sp3 ntrouter NTSrv
Version : WinNT:4.0
Platform : winnt
Issue type : kbbug