Question

I keep getting this error when i try to access forms that calls WCF functions.
Actually it works on my local machine but when it is in the server, this things happens 🙁

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.  

Stack Trace:

[WebException: The remote server returned an error: (401) Unauthorized.]
 System.Net.HttpWebRequest.GetResponse() +6115603
 System.ServiceModel.Channels.HttpChannelRequest.WaitForReply(TimeSpan timeout) +48

 [MessageSecurityException: The HTTP request is unauthorized with client authentication scheme 'Anonymous'. The authentication header received from the server was 'Negotiate,NTLM'.]
 System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg) +9439503
 System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type) +345
 Project.WCFUser.Users.HaveAccess(String userid, String filename) +0
 Project.WCFUser.Users.HaveAccess(String userid, String filename) in C:\Documents and Settings\MyPC\My Documents\Visual Studio 2010\Project\Project\Project\Service References\Users\Reference.cs:71
 Project.View.User.Details.Page_Load(Object sender, EventArgs e) in C:\Documents and Settings\MyPC\My Documents\Visual Studio 2010\Project\Project\Project\View\User\Details.aspx.cs:50
System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
 System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
System.Web.UI.Control.OnLoad(EventArgs e) +91
System.Web.UI.Control.LoadRecursive() +74
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2207

Answer 1

This error was solved by changing my security settings inside the web.config

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