Challenge-response with mod_auth_radius

[Arnaud Dostes <arnaud.dostes@unicible.ch>]

Hello,

We would like to use freeradius with a 'home made' challenge response 
authentication scheme (we will build our own module) using 
mod_auth_radius.

Ultimately we would like to prompt the user (after successfull 
authentication) with a challenge that he would have to enter in a securID 
like device and enter his response in the mod_auth_radius prompt.

I've been toying with freeradius and mod_auth_radius for a few days now, 
and I still haven't succeeded in prompting the user with a challenge from 
the RADIUS server.

Could anyone point me in the right direction ? Is it possible ? We're 
using mod_auth_radius as a basic client, but we could use any type of NAS.

Best regards,
Arnaud