Win32Exception:The target principal name is incorrect when calling a WCF service with WebClient

Question

I put together a quick chunk of example code with linqpad showing a WCF webservice call without creating a proxy class from the WSDL. Here\'s what I have:

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Answer 1

Try using AuthenticationManager.CustomTargetNameDictionary to specify the SPN you want to use when invoking that URL with WebClient:

http://blogs.msdn.com/b/jpsanders/archive/2009/03/20/httpwebrequest-class-does-not-use-port-number-in-spn-when-using-kerberos.aspx

http://msdn.microsoft.com/en-us/library/system.net.authenticationmanager.customtargetnamedictionary.aspx