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Asked: 2026-06-15T16:14:20+00:00

I have an ASP.NET MVC 4 web service. On my dev box, I’m running

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I have an ASP.NET MVC 4 web service. On my dev box, I’m running IIS Express 7.5, so we’re calling localhost:port. I have set it to use Windows Authentication and switched off Anonymous.

On my client, if I set

HttpWebRequest.Credentials = CredentialCache.DefaultNetworkCredentials;

it works. But if I set the credentials to my other Windows domain account,

HttpWebRequest.Credentials = new NetworkCredential("lpuplett", "catsGoW00f", "ntdom"));

then I get a 401 Unauthorized. Am I misunderstanding something; should this work?

I’ve tried adding the credentials to a CredentialCache object and setting the cache.

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1 Answer

  1. Editorial Team

    From comment in linked duplicate question:

    You need to specify the authentication type. When the server
    challenges the client with NTLM authentication the
    ICredentials.GetCredential method will be called on
    WebClient.Credentials with authType = “NTLM”. If you used
    WebClient.Credential = new NetworkCredential(…) as no authentication
    type is specified the client won’t be able to respond correctly.
    CredentialCache already implements this functionality. – Darin
    Dimitrov Nov 5 ’09 at 14:57

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