The distinction between a forwarder & a deployment client is blurred in SL. For forwarding all you need to do is open/listen to a port on the server & tell the forwarder to send data there. (splunk add forward-server ...). In the latest release, it's recommended that all forwarders also be deployment clients (splunk set deploy-poll ...). This ties into the server class concept where forwarders (configured as deployment clients) can be managed in groups.