Microsoft KB Archive/153070

= Some IPC$ Connections Cannot Be Disconnected =

Article ID: 153070

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Server 3.5
 * Microsoft Windows NT Server 3.51

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This article was previously published under Q153070



SYMPTOMS
When you connect to a Microsoft Windows NT version 3.51 server share, an initial connection is made to IPC$ and the connection is assigned to the username in Server Manager. This connection should drop off after the username has been authenticated, but it does not. However, it can be disconnected manually in Server Manager as long as the connection is still associated with the username.

Once you disconnect from the resource, the IPC$ connection is enabled until Autodisconnect disconnects it. At the point that you disconnect from the resource, the IPC$ connection is associated with your computer name. The IPC$ connection cannot be broken in Server Manager. Autodisconnect will break it unless it has been made unavailable.



RESOLUTION
 Enable Autodisconnect and set for a time appropriate for your environment. This can be done via the command line:

NET CONFIG SERVER /AUTODISCONNECT:

NOTE: The Windows NT Server service is self-tuning, normally the server configuration parameters are auto-configured (calculated and set) each time you boot Windows NT. If you run NET CONFIG SERVER in conjunction with the /AUTODISCONNECT, /SERVCOMMENT or /HIDDEN switches, the current values for the automatically tuned parameters are displayed and written to the registry. Once these parameters are written to the registry, you cannot tune the Server service using Control Panel Networks. If you changed any of the Server service settings, Windows NT is no longer able to automatically tune the Server service for your new configuration. To avoid losing the Server service's auto self-tuning capability, make the change through registry editor instead from a command line or Control Panel Network.

For more information, see the following articles in the Microsoft Knowledge base:

128167 Server Service Configuration and Tuning

138365 How the Autodisconnect Works in Windows NT

 Make an explicit connection to the IPC$ share and then disconnect from it.

NET USE \\servername\ipc$

NET USE \\servername\ipc$ /d

-or- Upgrade to Microsoft Windows NT version 4.0, where this problem has been corrected.

Keywords: KB153070

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