http://www.portforward.com/english/rout ... rindex.htm
Do EXACTLY as they say without missing ANYTHING, and you should have everything set up correctly.
-Scroll down the page and find your router and click on the name.
-Skip the advertisment page
-scroll down and select Flight Simulator 2004
-next click on the Static IP Address guide and complete it exactly as it says to do!
Direct link: http://www.portforward.com/networking/staticip.htm
(Not all systems will work with this setup, that's OK, set everything back to default like it says, and then move on to the next step)
-follow the step by step instructions for EACH port listed. Where it tells you to enter 2302, make it 2300 instead.
Your router's firewall should look like this when you are done:
(differing router's will have differing pages, but the open ports will be the same, regardless of design or maker)

-Now, You must