Microsoft KB Archive/312893

= RPC clients cannot connect to the servers that are behind ISA Server =

Article ID: 312893

Article Last Modified on 10/31/2006

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APPLIES TO


 * Microsoft Internet Security and Acceleration Server 2000 Standard Edition

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This article was previously published under Q312893



SYMPTOMS
Remote Procedure Call (RPC) client computers (for example, Microsoft Outlook clients that use RPC), cannot connect to an RPC server (for example, a Microsoft Exchange server that is behind Internet Security and Acceleration [ISA] Server) when the RPC server has more than four Internet protocol (IP) addresses that are bound to its network adapter. This problem occurs when you use server publishing to publish the multihomed RPC server on the ISA Server.



CAUSE
This problem occurs because the RPC filter in ISA Server does not publish when the server that is hosting the RPC program is multihomed with more than four IP addresses.



RESOLUTION
To resolve this problem, obtain latest service pack for ISA Server 2000. For more information about the latest service pack, click the following article number to view the article in the Microsoft Knowledge Base:

313139 How to obtain the latest Internet Security and Acceleration Server 2000 service pack



WORKAROUND
The work around this problem, reduce the number of IP addresses to less than four IP addresses that are bound to the RPC server.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.

This problem was corrected in ISA Server 2000 SP1.

Keywords: kbenv kbfix kbprb KB312893

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