Hi Matthew,
I can't downgrade the firmware because otherwise the IAP103 are not supported.
I could try to use an external RADIUS Server but I can't add other services to the customer.
Your third suggestion sounds interesting. I will try it in the next days.
P.S: Matthew, I know well that MAC AUTH is easy to bypass, but the customer has requested it, even if I have explain to him all the cons.
Thanks,
Massimo