Microsoft KB Archive/246467

= RAS Server Stops Responding to New PPP Connection Requests =

Article ID: 246467

Article Last Modified on 11/2/2006

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APPLIES TO


 * Microsoft Windows NT Server 4.0 Standard Edition

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This article was previously published under Q246467



SYMPTOMS
A Windows NT 4.0-based server that is running Remote Access Services (RAS) may stop responding to new Point-to-Point protocol (PPP) requests from clients. When this occurs, the server appears to continue servicing existing PPP connections, but no new connections are accepted.

This problem occurs only on multiple-processor computers, on which PPP logging is enabled on the server.



CAUSE
When two threads attempt to write to the PPP log file at the same time, a problem in the kernel may cause the thread that is currently writing to the file to enter a wait state from which it never returns. Because the PPP process cannot proceed until log file write operations have finished, the Rasman.exe process stops responding (hangs), putting the computer into a state in which it cannot accept more PPP connections.



RESOLUTION
A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The English-language version of this fix should have the following file attributes or later:   Date      Time                 Size     File name     Platform --  11/18/1999  04:16p             952,896  Ntkrnlmp.exe   i386 11/18/1999 04:14p             932,736  Ntoskrnl.exe   i386 11/18/1999 04:13p           1,403,968  Ntkrnlmp.exe   Alpha 11/18/1999 04:13p           1,375,744  Ntoskrnl.exe   Alpha



WORKAROUND
To work around this problem, disable PPP logging on multiple-processor RAS servers.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

Keywords: kbhotfixserver kbqfe kbbug kbfix KB246467

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