Microsoft KB Archive/128977

= RASPHONE Hangs After Making PPP Connection To Server =

Article ID: 128977

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Workstation 3.5
 * Microsoft Windows NT Server 3.5

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This article was previously published under Q128977



SYMPTOMS
The Windows NT 3.5 Remote Access application (RASPHONE.EXE) hangs after connecting to a service provider using PPP. You are able to exit RASPHONE by choosing End Task from the Task List, but you can continue to use RASPHONE until you shutdown and restart Windows NT. Additionally, the modem remains connected to the remote PPP server after you have forced RASPHONE application to end. You are unable to use the modem with either RASPHONE or another communications application until you shutdown and restart Windows NT.



CAUSE
This problem occurs if the remote PPP server sends an LCP echo request packet with an illegal length. RASPPPEN.DLL performs no length checking on an echo request.



STATUS
Microsoft has confirmed this to be a problem in Windows NT version 3.5. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

Additional query words: prodnt

Keywords: KB128977

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