Error accessing uncompiled pages using ISA Server 2006 SP1

Posted by Bravax on Stack Overflow See other posts from Stack Overflow or by Bravax
Published on 2009-03-09T14:52:46Z Indexed on 2010/06/09 0:32 UTC
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We are in the processing of configuring a portal to use ISA Server as our front end security provider.
So we are using ISA Server 2006 SP1.

Unfortunately when we access .net applications through ISA Server, the first time they are accessed.
i.e. They are not compiled yet, the following error appears:
Error Code: 500 Internal Server Error. The parameter is incorrect. (87)

In the ISA Monitoring logs, this shows:

Failed Connection Attempt
Log type: Web Proxy (Reverse)
Status: 87 The parameter is incorrect.

Once the application is compiled, the error never appears.
Does anyone know how to resolve this, so the site works correctly the first time?

Some additional information:

  • The websites accessed are running on windows server 2008 64 bit - standard edition, and occurs for Sharepoint as well as standard .net websites.
  • ISA Server is running on Windows server 2003 R2 SP2 Standard eidtion
  • The firewall on the windows server 2008 box allows all access. (To rule this out.)
  • Nothing odd appears in the IIS logs or firewall logs.

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