FreeRADIUS configation/consultancy for EAP-TTLS

The project is to configure FreeRADIUS (and provide configuration guidelines) for EAP-TTLS authentication on FreeRADIUS, when authentication requests are proxied to the existing billing system (xtradius-baed, not EAP-aware). During the initial tests eapol_test will be used, but at the final stage the testing with the real Wimax equipment is required.