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Source: Microsoft Support
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IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:
When you attempt to install an application on Windows Essential Business Server 2008, you receive an error message stating that TCP/IP port 10000 is already in use.
This error may occur if another process running on a Windows Essential Business Server 2008 computer is using the RPC dynamically allocated TCP port 10000. TCP port 10000 is the port that may be used by NDMP backup applications for its connections. If another process is using this port, an application’s setup may fail.
Windows uses remote procedure call (RPC) dynamic port allocation. During RPC dynamic port allocation, the RPC service assigns an RPC program a random port number that is more than 1024. Occasionally, RPC may assign TCP port 10000 to a program or service.
WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.
To work around this problem, modify the registry to exclude TCP port 10000 from the RPC port range. To do this, follow these steps:
Start Registry Editor (Regedt32.exe). You cannot use the Regedit.exe version of Registry Editor to complete these steps because you must create a multi-string registry value.
Locate and then click to select the following registry subkey:
In the RPC subkey, add a new subkey, and then name it Internet. In the Internet subkey, add the following values:
• Value Name: Ports Data Type: REG_MULTI_SZ Data: 10000
• Value Name: PortsInternetAvailable Data Type: REG_SZ Data: N
• Value Name: UseInternetPorts Data Type: REG_SZ Data: Y
Note You must restart the server for these changes to take effect.
For additional information about how to configure RPC port ranges, click the following article number to view the article in the Microsoft Knowledge Base:
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