Proxy EAP-TTLS inner auth type

Hi, I was tryin to figure out if it is possible to proxy only the inner auth type of EAP-TTLS. The only information I could find on this is: http://lists.cistron.nl/pipermail/freeradius-users/2005-March/042098.html This talks about PEAP. Is the same possible for EAP-TTLS? Also i could not find any information about the attribute "proxy_tunnel_request_as_eap" mentioned in the previous mail. Can someone please point me to any documentation on how to configure the server to terminate the tunnel and proxy the inner auth type. Thanks in advance. Regards, -Sayantan