How to change WSDL URL from internal machine name to public?

<serviceBehaviors>
   <behavior name="<name>">
     <!-- Other options would go here -->
     <useRequestHeadersForMetadataAddress>
       <defaultPorts> <!-- Use your own port numbers -->
          <add scheme="http" port="81" />
          <add scheme="https" port="444" />
        </defaultPorts>
      </useRequestHeadersForMetadataAddress>
   </behavior>
</serviceBehaviors>

Kaynak: https://stackoverflow.com/questions/5007270/how-to-change-wsdl-url-from-internal-machine-name-to-public?answertab=votes#tab-top