(A) One Freeradius server on Debian 6: freeradius installation and client.conf configuration

(B) Another Debian 6 box with sshd: libpam-radius-auth installation

(C) Several Windows and Linux ssh clients

In (A) freeradius server, can I define the ssh users in client.conf file only ???

In (B) debian sshd box server, do I have to install a radius client in addition to libpam-radius-auth package ??? And do I have to define any ssh user here ???

Please, I need a good howto because I'm lost.

Thanks a lot,

Roberto