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Problem :

I have created one of the WCF service and deployed it on the Server. When I browse this service it gives me positive response with the wsdl URL. Now I am trying to test my service through the WCF Test client. It shows me proper metadata. But when I try to invoke any of my method from a service it shows me the exception. Below are the error details with stack trace..

The HTTP request is unauthorized with client authentication scheme 'Anonymous'. The authentication header received from the server was 'Negotiate,NTLM'.

The Server stack trace :

System.ServiceModel.Channels.HttpChannelUtilities.ValidateAuthentication(HttpWebRequest request, HttpWebResponse response, WebException responseException, HttpChannelFactory factory)
The HTTP request is unauthorized with client authentication scheme 'Anonymous'. The authentication header received from the server was 'Negotiate,NTLM'.


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1 Answer

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Solution :

I did not have the control over my security configuration for a service I was calling into, but got a same error. I was able to fix my client as shown below :

1.In your config, set up the security mode as shown below :

<security mode="TransportCredentialOnly">
<transport clientCredentialType="Windows" proxyCredentialType="None" realm="" />
<message clientCredentialType="UserName" algorithmSuite="Default" />

2.In your code, set up the proxy class to allow impersonation (I have added the reference to a service called customer) as shown below :

Customer_PortClient proxy = new Customer_PortClient();
proxy.ClientCredentials.Windows.AllowedImpersonationLevel = System.Security.Principal.TokenImpersonationLevel.Impersonation;


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