I have a cable modem and a wireless router. We have 4 laptop clients connected. We all use http, which is port 80. I use a direct connect program that uses TCP port 612. I forwarded 612 to my computer using the router's NAT. Why do I need to forward that port to me? Why don't we forward port 80? I know we all use 80, so is that why? The packets get sent everywhere? What if someone else wanted to us that DC program on port 612?
To me, port-forwarding seems like a paradox. I understand why you'd use it: to forward w/e packets are coming through that port to your computer. I know I can only forward a port to one computer, so I don't get why 80 isn't forwarded -- well, more than 1 computer obviosuly.
Does anyone understand what I'm getting at?