question on challenge message

[Alan DeKok]

Nagaraj Venkatapuram <nagaraj2 at gmail.com> wrote:
> what is the configuration required on radius server(freeradius ver1.0.5) to
> send challenge messages to the radius client ?
> How does Radius server determine when to send challenge messages to the
> client ?

  The authentication protocol determines when the server challenges
the client.  The client controls the authentication protocol.

  Alan DeKok.