OOOOOOOOh I get it now , the concept is to create a new user in guacamole interface *without* *password* . this stop him from connection by usingg jdbc , and after this you create a user with the same identity in radius . and by this way you make sure that guacamole go to radius for authentification and you jdbc for Users Data . Thank you very much For your Help People and if anyone have a question I m ready to answer
*EZZAKI Kamal*
