I have a Linksys Router model WRT54GS, and I use it for my home network. One of my kids insists on using P2P and it doesn't really look like I can block P2P traffic on my router. So, I am wondering if there is a way to narrow down the traffic. I am not sure if I can describe it correctly but a friend of mine said that I could narrow his MAC address to a few ports. That way, even if he uses P2P the traffic will be slow. Is there a way to narrow down the P2P traffic on my router, or block P2P all together?