C# - WCF works on local machine, but not over network

Question

I have a problem with my WCF in a C# appliction. I am able to call the Service when server and client are on the same PC, but i get a timeout on the request if server and client are on different PCs. I have opened the ports in the firewall (I use port 9998) and I even tried to shut the firewall down. The app.config of the server looks like following:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5"/></startup>
  <system.serviceModel>
    <behaviors>
      <serviceBehaviors>
        <behavior name="SMS_ServiceBehavior">
          <serviceMetadata />
        </behavior>
      </serviceBehaviors>
    </behaviors>
    <services>
      <service behaviorConfiguration="SMS_ServiceBehavior" name="SMSapplication.SMS_Service">
        <endpoint address="http://10.20.5.100:9998/SMS_Service" binding="basicHttpBinding"
          bindingConfiguration="" name="SMS_ServiceEndpoint" contract="SMSapplication.ISMS_Service" />
        <endpoint address="http://10.20.5.100:9998/mex" binding="mexHttpBinding"
          bindingConfiguration="" name="mex" contract="IMetadataExchange" />
      </service>
    </services>
  </system.serviceModel>
</configuration>

Does anyone please have an idea what else I could try or where the error could be?

Answer 1

The config file of the client looks like this:

    <?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <startup> 
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
    </startup>
    <system.serviceModel>
        <bindings>
            <basicHttpBinding>
                <binding name="SMS_ServiceEndpoint" />
            </basicHttpBinding>
        </bindings>
        <client>
            <endpoint address="http://localhost:9998/SMS_Service" binding="basicHttpBinding"
                bindingConfiguration="SMS_ServiceEndpoint" contract="SMS_Service.ISMS_Service"
                name="SMS_ServiceEndpoint" />
        </client>
    </system.serviceModel>
</configuration>

Answer 2

I take care in the code by following:

SMS_Service.SMS_ServiceClient client = new SMS_Service.SMS_ServiceClient();
client.Endpoint.Address = new EndpointAddress(new Uri("http://10.20.5.100:9998/SMS_Service"), client.Endpoint.Address.Identity, client.Endpoint.Address.Headers);
client.Open();
client.DoWork("test");
client.Close();