I run a CS server in a small LAN. I really need an ability to BAN players by their MACs. If I ban their IPs - they can easily change it. I can't ban their IDs, coz they all have the same one - VALVE_ID_LAN. I also CAN'T re-configure my LAN for IP->MAC bindings - I just dont have such access. So, is it possible by AMXX or any other server mod (or even metamod) to ban players by MACs?