Alan,

Thank you for you time.
I downloaded, compiled and installed the 2.1.7 version.
I replaced my /usr/local/raddb folder by the 2.1.7 raddb folder and used that to make sure my config didnt conflict.
I only modified radiusd.conf to add experimental.conf and added "python" in the post-auth section of site-enabled/default

[root@someserver freeradius-server-2.1.7]# /usr/local/sbin/radiusd -X
FreeRADIUS Version 2.1.7, for host x86_64-unknown-linux-gnu, built on Oct 21 2009 at 15:24:29

--*snip*--

including configuration file /usr/local/etc/raddb/experimental.conf

--*snip*--

Module: Checking post-auth {...} for more modules to load
Module: Instantiating echo_NAS_Info
exec echo_NAS_Info {
    wait = yes
    program = "/bin/echo %{User-Name}, %{NAS-IP-Address}, %{NAS-Port} "
    input_pairs = "request"
    output_pairs = "reply"
    shell_escape = yes
}
/usr/local/etc/raddb/sites-enabled/default[423]: Failed to find module "python".
/usr/local/etc/raddb/sites-enabled/default[380]: Errors parsing post-auth section.

Is there anything else I should do ?

--
Philippe-Alexandre Lemelin