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PONot passing Credentials to WCF Service resulting in a 401
 

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    <p>I'm tearing my hair out on this one, I have a WCF service that I can call through the browser and it works fine, when I call it from the web application with the below method I get a <strong>(401) Unauthorized</strong> error. And the service does not get called. What's more, when I run my web application from my local machine (debug mode using IIS Express) pointed at my dev server (IIS7) it works but when I deploy my web application to the dev server and point it to the dev server services it fails wit the 401 error. I think this is something to do with IIS7 but I'm not 100% sure and help would be super useful.</p> <p>I have looked online for the answers but thus far the best I have found is <a href="http://jgvimalan.wordpress.com/2010/10/14/using-windows-identity-and-impersonation-with-wcf-on-iis-7/">this</a>.</p> <p>My service call is as follows:</p> <pre><code>var request = (HttpWebRequest) WebRequest.Create(url); request.Method = "GET"; request.ContentType = "application/json; charset=utf-8"; request.AuthenticationLevel = AuthenticationLevel.MutualAuthRequested; request.Credentials = CredentialCache.DefaultCredentials; WebResponse responce = request.GetResponse(); Stream reader = responce.GetResponseStream(); var sReader = new StreamReader(reader); string outResult = sReader.ReadToEnd(); sReader.Close(); var result = (T) JsonConvert.DeserializeObject(outResult, typeof (T)); return result; </code></pre> <p>My configuration for the service looks like this :</p> <pre><code> &lt;service name="RGMPServices.Householding.Services.AccountService" behaviorConfiguration="Default"&gt; &lt;endpoint address="" kind="webHttpEndpoint" endpointConfiguration="SecuredHttpEndpointBinding" contract="RGMPServices.Householding.Contracts.IAccountService" /&gt; &lt;/service&gt; &lt;service name="RGMPServices.Householding.Services.HouseholdService" behaviorConfiguration="Default"&gt; &lt;endpoint address="" kind="webHttpEndpoint" endpointConfiguration="SecuredHttpEndpointBinding" contract="RGMPServices.Householding.Contracts.IHouseholdService" /&gt; &lt;/service&gt; &lt;service name="RGMPServices.Householding.Services.UserService" behaviorConfiguration="Default"&gt; &lt;endpoint address="" kind="webHttpEndpoint" endpointConfiguration="SecuredHttpEndpointBinding" contract="RGMPServices.Householding.Contracts.IUserService" /&gt; &lt;/service&gt; &lt;/services&gt; &lt;behaviors&gt; &lt;endpointBehaviors&gt; &lt;behavior name="webBehaviour"&gt; &lt;webHttp /&gt; &lt;/behavior&gt; &lt;/endpointBehaviors&gt; &lt;serviceBehaviors&gt; &lt;behavior name="Default"&gt; &lt;serviceMetadata httpGetEnabled="true" httpsGetEnabled="true" /&gt; &lt;serviceDebug includeExceptionDetailInFaults="true" /&gt; &lt;/behavior&gt; &lt;/serviceBehaviors&gt; &lt;/behaviors&gt; &lt;standardEndpoints&gt; &lt;webHttpEndpoint&gt; &lt;standardEndpoint name="SecuredHttpEndpointBinding" helpEnabled="true" automaticFormatSelectionEnabled="true"&gt; &lt;security mode="TransportCredentialOnly"&gt; &lt;transport clientCredentialType="Windows" /&gt; &lt;/security&gt; &lt;/standardEndpoint&gt; &lt;/webHttpEndpoint&gt; &lt;/standardEndpoints&gt; </code></pre> <hr> <p>I have put some logging on the client service call, just before I call the service, the response is:</p> <blockquote> <p>DEBUG 2013-10-01 13:15:13,569 452ms ServiceGetSingle - Passing Login: MYLANDOMAIN\MYLANUSERNAME</p> <p>ERROR 2013-10-01 13:15:13,631 514ms ServiceGetSingle - ERROR Calling ServiceGetSingle with user credentials login: MYLANDOMAIN\MYLANUSERNAME System.Net.WebException: The remote server returned an error: (401) Unauthorized. at System.Net.HttpWebRequest.GetResponse() at Householding.Common.ServiceHelper.ServiceGetSingle[T](String url)</p> </blockquote> <p>The code looks like:</p> <pre><code>logger.Debug("Passing Login: " + System.Security.Principal.WindowsIdentity.GetCurrent().Name) </code></pre> <hr> <p>Even when I set the AppPool for my website to my domain account it is still not authorising me to access the WCF Service, but again: it's working for the browser. So weird!</p>
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    1. COIt's not always easy getting WCF and windows authentication working. Try Fiddler on the client to trace the http flow. Also try configuring WCF tracing on the server: http://msdn.microsoft.com/en-us/library/ms733025.aspx
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