We have added a new article in Microsoft ISA Server  section. The detail of this article is

Title: The ISA Server RPC Filter Blocks RPC Traffic after Windows Server 2003 SP1 is Installed on a Computer that is Running ISA Server 2004 or ISA Server 2000

Purpose: After you install the windows server 2003 service pack 1, the ISA Server remote procedure call (RPC) filter blocks RPC traffic between networks. The purpose of this article is to solve this problem.

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