1.Click the start button located on the bottom left of your screen.
2. Windows 7 and vista users: Type in CMD and click on the first result.
Windows XP or older users: Click on run and type in CMD. and type in ipconfig

3. Scroll all the way up and you should see default gateway, open up your internet browser and type in that address. HINT: THERE SHOULD BE NO .COM OR WWW.

4. Now we have to figure out the login information. This may vary from the brand of router you have. You may want to check with your parents to see if they have changed it. If they haven't or it is your own setup, look on this list www.phenoelit-us.org/dpl/dpl.html find the corresponding router brand and look at the default logins.

5. Once you've gotten into the router page, you should see something that says port forwarding, or something about games. Click on that link.

6. On the port forwarding page, click on add a custom service, or anything that seems to be similar to that as it may vary for different routers. Now you should be prompted for a service name, which can be whatever you want (ex. BukkitServer) a protocol (should be TCP/UDP, if you router only has a option for one of those at a time choose TCP, then after you add it go back and add one for UDP) a starting and ending port (can be whatever, should be 25565 for both) and a server IP address (go back to the CMD and use the IPv4 address on there) now click apply.

7. You should be done now! Go to www.whatismyip.com and you should be able to connect to your server with that IP address. If you can not, make sure you have your server running on your computer, and make sure any antivirus/firewalls are disabled.

If you have any questions or issues please post in the comments and I will respond asap.

FAQ:
Coming soon.