yes, usualy on your computer you need to login to your ROUTER, the instructions will tell you how to do that, for most Link SYS routers
it is loading up your browser on a Comp that the router is connected to and typing in the address bar
http://Http://192.168.1.1
and then it will have a User name and Password that you need to punch in, the instructions will tell you what the default ones are if no one changed them. most defaults are User name :administrator and PW:administrator
once logged into the router you will find many configurations pages, your instructions will show you the right page to goto top punch in MAC addresses to allow for open Ports! punch it in and it will WORK!