Why does 'localhost' in web references cause SocketExceptions?

Posted by Sam on Stack Overflow See other posts from Stack Overflow or by Sam
Published on 2010-03-24T11:19:53Z Indexed on 2010/03/24 11:23 UTC
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.NET

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web-services

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deployment

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localhost

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socketexception

I have two .net web services deployed to the same IIS server using SSL, one that references the other.

If I set that web reference to 'localhost', some calls fail with this exception:

System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.Net.WebException: Unable to connect to the remote server ---> System.Net.Sockets.SocketException: No connection could be made because the target machine actively refused it

If I set it to the actual machine name, it works.

Why?

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