Freeradius Shared Secret?

Hi,

I'm wondering how you can set the shared secret on the freeradius server.

I checked already freeradius.org and the wiki pages.

I cannot find it anywhere!!

For those who are wondering what I mean by the shared secret: It' s the password used for interacting with the Radius client or authenticator.

If somebody knows who to administer this shared secret , please let me know.

Kind regards,Ralf.