WCFTestClient The HTTP request is unauthorized with client authentication scheme 'Anonymous'

Question

I've created one WCF service and deployed it on Server. When I browse this service it gives me positive response with ?wsdl URL. Now I'm trying to test the service through WCF Test client. It shows proper metadata. But when I try to invoke any of the method from the service it shows me an exception... here are the erro details with stack trace..

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

Server stack trace:

at
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'.

Server stack trace:

at
System.ServiceModel.Channels.HttpChannelUtilities.ValidateAuthentication(HttpWebRequest request, HttpWebResponse response, WebException responseException, HttpChannelFactory factory)

Client Bindings:

Server Bindings:

Client's Client Section:

Server's Services Section:

user_131345 · Answer

I didn't have control over the security configuration for the service I was calling into, but got the same error. I was able to fix my client as follows.

In the config, set up the security mode:
```
  
  
```

In the code, set the proxy class to allow impersonation (I added a reference to a service called customer):

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

user_27483 · Answer

I see this isn't answered yet, this is an exact quote from here:

WSHttpBinding will try and perform an internal negotiate at the SSP layer. In order for this to be successful, you will need to allow anonymous in IIS for the VDir. WCF will then by default perfrom an SPNEGO for window credentials. Allowing anonymous at IIS layer is not allowing anyone in, it is deferring to the WCF stack.

I found this via: http://fczaja.blogspot.com/2009/10/http-request-is-unauthorized-with.html

After googling: http://www.google.tt/#hl=en&source=hp&q=+The+HTTP+request+is+unauthorized+with+client+authentication+scheme+%27Anonymous

user_164377 · Answer

Just got this problem on a development machine (production works just fine). I modify my config in IIS to allow anonymous access and put my name and password as credential.

Not the best way I am sure but it works for testing purposes.

user_9875486 · Answer

I had this error too , and finally this codes worked for me in dot net core 3.1

first install svcutil in command prompt : dotnet tool install --global dotnet-svcutil

Then close command prompt and open it again.

Then create the Reference.cs in command prompt :

dotnet-svcutil http://YourService.com/SayHello.svc

(It needs an enter key and UserName and Password)

Add a folder named Connected Services to project root.

Copy Reference.cs file to Connected Services folder.

Add these 4 lines to Reference.cs after lines where creating BasicHttpBinding and setting MaxBufferSize :

result.Security.Mode = BasicHttpSecurityMode.TransportCredentialOnly;
result.Security.Transport.ClientCredentialType = HttpClientCredentialType.Basic;
result.Security.Transport.ProxyCredentialType = HttpProxyCredentialType.None;
result.Security.Message.ClientCredentialType = BasicHttpMessageCredentialType.UserName;

Use this service in your Controller :

public async Task Get()
    {
        try
        {
            var client = new EstelamClient();
            client.ClientCredentials.UserName.UserName = "YourUserName";
            client.ClientCredentials.UserName.Password = "YourPassword";
            var res = await client.EmployeeCheckAsync("service parameters");
            return res.ToString();
        }
        catch (Exception ex)
        {
            return ex.Message + " ************ stack : " + ex.StackTrace;
        }

    }

Do not forget install these packages in csproj :

WCFTestClient The HTTP request is unauthorized with client authentication scheme 'Anonymous'

10 Answers