use WCF service method returns The Caller was not authenticated by the service

Question

I have a project with several WCF services compiled, and accessible by another project on the same machine. Now I’m trying to connect to one of these services from another machine. I put the service refence URL, but it asks me for authentication. What should I do to connect to the service? I have all the available methods, but when running the program gives me the authentication error. I have the service on the web.config so:

  <!--Companies Service-->
  <service name="BusinessServicesImplementation.CompaniesService"
           behaviorConfiguration="BusinessServicesImplementation.GeneralServiceBehavior">
    <endpoint address=""
              binding="wsHttpBinding"
              bindingConfiguration="wsHttpTransactionalBinding"
              contract="BusinessServicesImplementation.ICompanyService">
      <identity>
        <dns value="localhost"/>
      </identity>
    </endpoint>
    <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
  </service>

On the client’s side I have:

<binding name="WSHttpBinding_ICompanyService" transactionFlow="true" />
...
<endpoint address="http://URLEXTERIORÀMÁQUINA/Services/CompaniesService.svc"
          binding="wsHttpBinding" bindingConfiguration="WSHttpBinding_ICompanyService"
          contract="CompaniesService.ICompanyService" name="WSHttpBinding_ICompanyService">
          <identity>
            <dns value="localhost" />
          </identity>
        </endpoint> 

In the design of the same machine of the service I have the address at endpoint as localhost, the rest is all the same and has been working for many years (it was done for a long time before I joined the company). How can I fix it? Thanks

Answer 1

Maybe it’s the machine’s firewall that’s preventing incoming requests. Checks which port the service is using and releases it in the Windows firewall.