I have been trying for a week now and can't get into a single realistic or Sim game

[Raw Kryptonite]

Best to write down the mac, go to the router and set that mac in the dmz. You can leave it on DHCP that way if you want.
Another good thing to do is to also put that mac in the QOS (quality of service) tab and set priority to "high". Your router will dedicate the bulk of the bandwidth to the console. Anything else online will take a backseat to it so that you don't get any sags in performance. Also known as "the marriage saver" when your wife has a laptop online while you're hosting. LOL