Hi,
welcome on our list! :-)
To do this, first of all, I should block OGMs from a particular station. I tried with ebtables in order to block all the packets with source MACa (where MACa is the MAC address of the station I would prevent to communicate with me), but I failed.
Does anyone know a working way to do what I described before?
I think it would be easier to help you, if described in more detail what exactly you tried so far and why it was not successful. Please give us all the settings & commands involved otherwise we have to guess what is going on.
Cheers, Marek