For some reason, my network has two routers (one built into the modem and then a second one). I'm not sure how to access through two though. I've tried setting up both to open the same port number going to the same final static IP (the IP of the computer) and I've tried port forwarding the first router to the second's IP then port forwarding the second's IP to the computer's static IP. Neither work.
The first router is Zyxel EZ-660R and the second is some linksys if that helps. I've tried following the Portforward website but its guide doesn't seem to work for my situation.