do you absolutly think that people like to hold your hand and coddle you through every step of the way on this? a LARGE part of homebrew is to figure things out for yourself. forums are only meant as a push in the right direction.
and what good is a router with no WAN port. None other than the fact you can disable DHCP in it and use it as a switch.
I did read that you transferred a game. this means your setup was working. this has nothing to do with your software, but rather it's a hardware problem. get a good router and it should be fixed. are you that damn oblivious that I have to keep restating? Until you get the hint, this thread is locked. don't create another one on this topic.
you already have a solution, yet you refuse to take it. now it's time to force you into taking it.