Authentication with MACADDRESS and PASSWORD

It's possibile to enable autentication with Freeradius server using MACADDRESS (username) and password (textmode) ? I've try this: 0014853077be Cleartext-Password := "passwordtest" Tunnel-Private-Group-ID := 3 Using MACADDRESS for "password" it works fine, but I dont know how to set password on client (Mac/Linux/windows) Thanks Paolo