Ok, so one of my housemates hasn't paid his contribution of the internet charge, and is being a real dick about giving me the money. Is there any way I can block his computer from accessing the internet through my AEBS? He connects via ethernet, so if I were to set MAC control, would his computer be blocked, or does that only work for wireless clients? There are 3 other people in the house (including myself) who need access to the internet. Any help you can give me would be greatly appreciated.