The remote server returned an error: (401) Unauthorized

Question

I developed a remoting service (hosting .NET type in the ISS). IIS is configured to use "Integrated Windows Auth".

It works perfectly when I execute unit test the service on the "localhost" (the code below is the code I use for testing), but after I have deployed a service to the test server (which in another another domain), it started throwing a "System.Net.WebException: The remote server returned an error: (401) Unauthorized." exception.

    string url = string.Concat(@"http://", serverName, "/", ServiceName);

    IDictionary props = new Hashtable();
    props["useDefaultCredentials"] = true;
    props["useAuthenticatedConnectionSharing"] = true;

    BinaryServerFormatterSinkProvider srv = new BinaryServerFormatterSinkProvider();
    BinaryClientFormatterSinkProvider clnt = new BinaryClientFormatterSinkProvider();
    this.channel = new HttpChannel(props, clnt, srv);

    ChannelServices.RegisterChannel(this.channel, false);

    IMyService service = Activator.GetObject(typeof(IMyService), url) as IMyService;

    service.GetData();// this error returns "System.Net.WebException: The remote server returned an error: (401) Unauthorized." exception.

What might be the issue? Is it domain related? May be it has something to do with a configuration of the default web proxy?

Answer 1

What credentials are you using? Is the system using Windows authentication? If so, does the other domain accept users from your domain?

You may have to define a trust relationship between domains, or log in with different and appropriate credentials for the server's domain.