Question

I have a simple setup, a WPF application running on the machine and a WCF service hosted within a Windows Service on the same machine (always on the same machine). When i debug on one computer i can easily access the local WCF Service. When i run it on another machine i get an error:

“The server has rejected the client credentials.”

Some of my observations are, that at my local machine i have no domain/network. Its my home machine. When at a customers site, it will not run, and gives the above error. Anyone got any ideas on why this is different on these computers?

/Brian

Edit:

Contract:

[ServiceContract(Namespace = "http://www.greenweb.dk/motiondetection")]
    public interface IMotionDetection
    {
        [OperationContract]
        bool GetMotionDetected();
    }

App.Config

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <system.serviceModel>
    <bindings />
    <client />
    <services>
      <service name="GreenWebPlayerMotionDetectionService.MotionDetected" behaviorConfiguration="MotionDetectionBehavior">
        <host>
          <baseAddresses>
            <add baseAddress="net.pipe://localhost/GreenWebMotionDetectionService/"/>
          </baseAddresses>
        </host>
        <endpoint address="" contract="GreenWebPlayerMotionDetectionService.IMotionDetection" binding="netNamedPipeBinding"/>
        <endpoint address="mex" contract="IMetadataExchange" binding="mexNamedPipeBinding"/>
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior name="MotionDetectionBehavior">
          <serviceMetadata httpGetEnabled="false"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
  </system.serviceModel> 
</configuration>

Edit 2
Security will not be a problem, no security is neeed, the computer on which it runs is already isolated from everything else.

EDIt 3
Have set <security mode="None"></security> on both the client and the server, now im getting this error: “There was an error reading from the pipe: Unrecognized error 109 (0x6)”

I can’t figure out whether this is a step in the right direction

Answer 1

The problem seems to be the security. Instead of None i set the client and server to be “EncryptAndSign”. This however wasnt enough when the host was a windows service. I abandoned the windows service approach and hosted it in a windows application instead – then it worked immediately…go figure!