i got a problem with my router, its a Linksys WRT310N and the link up top dosn't have it, my router also asks for a "Internal Port" right after External Port, and my router has three diffrent catagories for fowarding like
-Single Port Forwarding
-Port Range Forwarding
-Port Range Triggering
i need help only on that so far, il try by myself until i figure something out.