How To Change The Binding of a WCF Service - wcf

Question

I have a very simple (see any getting started sample online) wcf service library. And i can run it via the WCF Test Client exe on localhost. But when accessing it via another client tool, like soapUI, i get errors. I believe the errors are related to security configuration of the service.
How can i change the binding of a service, like is suggested in this post:
"Invalid or expired security context token" when running after a debugging restart
Is this in app.config or web.config. my project doesnt even have a web.config.
Here's my app.config:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<system.web>
<compilation debug="true" />
</system.web>
<!-- When deploying the service library project, the content of the config file must be added to the host's
app.config file. System.Configuration does not support config files for libraries. -->
<system.serviceModel>
<services>
<service name="NorthwindServices.ProductService">
<host>
<baseAddresses>
<add baseAddress = "http://localhost:8732/Design_Time_Addresses/NorthwindServices/ProductService/" />
</baseAddresses>
</host>
<endpoint address ="" binding="wsHttpBinding"
contract="NorthwindServices.IProducts">
<identity>
<dns value="localhost"/>
</identity>
</endpoint>
<endpoint address="mex" binding="mexHttpBinding"
contract="IMetadataExchange"/>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior>
<!-- To avoid disclosing metadata information,
set the value below to false and remove the metadata endpoint above before deployment -->
<serviceMetadata httpGetEnabled="True"/>
<!-- To receive exception details in faults for debugging purposes,
set the value below to true. Set to false before deployment
to avoid disclosing exception information -->
<serviceDebug includeExceptionDetailInFaults="False" />
</behavior>
</serviceBehaviors>
</behaviors>
</system.serviceModel>
</configuration>