Request Help On setting up SSL using external server certs on freeradius

Hi Guys, I am trying to achieve below thing. I am written radius module which will do Authentication and authorization with external identity providers. Thee module is working fine as the part of hardening I thought of enabling the SSL(server certs) so that all client request to server and server to clients go via this SSL. I am try to read the documents and even deploying radius ( http://deployingradius.com/) its only talk about tls for *EAP* Auth type. Is Configure the SSL between radius server and clients is required? if required can any one point to how to configure it. Regards, Shivaprasad