Script or MT configuracion

Hi everyone,

I think it is the correct forum instead of http://forum.mikrotik.com/viewforum.php?f=14.

My scenario is I have several PPPoE servers in several Datacenters and I have a unique RADIUS server to authenticate the pppoe clients. It works fine.
As in all networks, there are some pppoe clients which I do not want to permit its connection (they are not yet my customers now ). However, his MT device pppoe-client is still active and his devices sends pppoe requets.

I want to black them in my firewall automatically. It means when a pppoe request are block X times, then it appear in my firewall.

Is it necessary to implement a script or there is a configuration way.

Thanks,
Santiago