Checkrad

[Aurélio de Souza Ribeiro Neto]

Hello,

     When FreeRadius uses the checkrad to check simultaneous use?

     When FreeRadius receives an authentication Packet, what's the flow? 
I'm using MySQL.

     In FreeRadius manual the Authentication Flow is:

     Authorize: Radwho or Checkrad?
     Auhtenticate
     Post-Auth
     Send Response

     I don't know If i'm clear, but I want to know What's the sequence 
of Radwho and Checkrad in process.

Thanks