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DCOM port range configuration problems
Article ID: 217351 - View products that this article applies to.
This article was previously published under Q217351
You may notice the following symptoms:
This problem occurs because of improper configuration of the port range settings in the
HKEY_LOCAL_MACHINE\Software\Microsoft\Rpc\Internetregistry key or because the port restrictions for a protocol are configured through the DCOMCNFG protocol property page.
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/322756/ )How to back up and restore the registry in Windows
To resolve this problem, use one of the following methods:
Configuring the computer to use a range of ports can break other applications on the system. On systems that are running Microsoft Windows NT 4.0 Service Pack 4 and later, the best alternative is to configure the DCOM application to use the static endpoint by using the AppId key.
To configure the DCOM application to use a static port by using TCP/IP as the DCOM protocol, follow these steps:
On the Client Computer:
For more information regarding the mapping for the .exe name, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/216051/ )FIX: DCOMCNFG NT 4.0 SP4 Does Not Write .exe Name under HKCR\APPID