RRAS Event ID 20103 When Using Microsoft Proxy Server Version 1.0

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This article was previously published under Q178272

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SYMPTOMS

Your Windows NT Routing and Remote Access Service (RRAS) server, which is also running Microsoft Proxy Server version 1.0, may log one or more of the following event log errors in Event Viewer:

   Event ID   : 7000
   Source     : Service Control Manager
   Description: The IP Filter Driver service failed to start due
                to the following error: The system cannot find the
                file specified.

-or-

   Event ID   : 20103
   Source     : Router
   Description: Unable to load c:\winnt\system32\iprtrmgr.dll

-or-

   Event ID   : 7024
   Source     : Service Control Manager
   Description: The Routing and Remote Access Service service
   terminated with the service-specific error 110.

NOTE: This problem only happens after you have enabling filtering in RRAS Admin.

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CAUSE

RRAS does not install the file Ipfltdrv.sys if it detects that Microsoft Proxy Server is already installed on the computer.

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RESOLUTION

To workaround this issue, use one of the following methods:

Manually copy the file Ipfltdrv.sys from the RRAS directory into the %Systemroot%\System32\Drivers folder.

NOTE: The default folder for RRAS is C:\Routing, but it may vary depending on how you installed the update.

-or-
Upgrade to Microsoft Proxy Server version 2.0.

-or-
Uninstall RRAS and reinstall the update on a different server.

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

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