Connecting external server in Freeradius-Module via HTTP-Proxy

Hi, I am trying to achieve below thing in my module 1.I am trying to connect to external server for authentication and authorization (Both working fine) in public network. 2. If the external server is in intranet(http proxy) we are facing issue, Is there is any conifg where we can do configure the *HTTP proxy* so that all the network which goes via this radius-server can go through this *HTTP proxy*. Thanks, Shivaprasad