This is my first instuctable so don't be hating!
Pictures taken from www.PortForward.com
Step 1: Static IP
By the way i'm assuming your running on the same system as me (Windows XP) but i believe it is fairly similar on all systems anyway.
To start your going to need to figure out your current IP address and other little things.
Start by clicking start (convenient isn't it) click run and type in "cmd" and hit enter. once in here type in "Ipconfig /all" and hit enter. a few lines of information should pop up. Write down the IP address, Subnet mask, Default Gateway and DNS servers
Step 2: Setting Up Your Static IP Address
Once your in this window look under the "this connection uses the following items:" and right click "internet protocol" and yet again select "properties". A window should pop up. But before you change anything jot down the current information shown just incase things get screwed up.I want you to click "Use the following IP address".
Step 3: Setting Up Your Static IP Address Cont'
So if your routers IP is 192.168.1.1(Which it is by default) then you'll want something like 192.168.1.200. The last numbers can't be anything though it should be between 1-254 and definately shouldn't be the same as the routers IP address or this won't work.
Now once you've found out your IP adress your going to use and entered it, i want you to enter the information you got before(from cmd) and put on that piece of paper. Subnet mask, Default gateway and the DNS servers should all be the same as before.
Now test your connection by opening up a new internet window or refreshing the current one. Hopefully it works, if it doesn't your going to need to call who ever provides your internet and ask them what your DNS servers are(Because this is usually the problem). Once they tell you, simply just enter this into the correct spot. Test your connection, and if it works Great! you can now start Port forwarding your router!
Step 4: Port Forwarding Your Router
Now once in here it will be different for all routers. I'll teach you how to do it with a Linksys.
Click the applications and gaming link, it should be near the top of the page. The menu should now have changed and there will bea few tabs at the top of it but you're going to use "Port range forwarding" once you've gone to this new menu type in the name of the application your going to port forward (ex. Warcraft3). Now your going to need to know which ports this game needs open. For Warcraft 3 its 6112-6119 both TCP and UDP. so in start put 6112, end put 6119 and under TCP UDP select BOTH then there will be a little box thats blank for you to enter the last digits of your ip address so do so. Then make sure to hit the "enabled" button now hit save settings and your done!
Step 5: Problems?
Step 6: Hosting
First open Warcraft 3(quiet obvious isn't it?) and hit Battle.Net and log in.
Once you've logged in click on the customs game tab(i believe the keyboard shortcut is G) and look for the Creat game button and click it. Now your most likely going to want to host a map you've downloaded so open the "download" folder and find the map you are looking for (they are sorted first by how many players can play it then by Name) and once you've found it just click it once to select it and type in an appropriate name.
If the map is X Hero Siege then your most lickely going to want to name it "X Hero Siege" but someone might have already hosted with that name and it won't let you host, so what i usually do is just add a few exclamation marks (X Hero Siege!!!) once in the game wait for people to join, and it should usually be instant depending on how popular the map your hosting is.
If nobody joins that means you may have messed up port forwarding/People hate the map your playing/ your hosting on the wrong port.
so if your port is set up wrong in the game exit battle.net until your at the main screen and click options then the gameplay tab and near the bottom of the screen you'll see "Game Port" make sure it is 6112 as this is the default for Warcraft 3. Now hit ok go back and try to host if it still doesn't work i recommend downloading this file to portforward incase you've messed it up :)
https://portforward.com/store/pfconfig.cgi but i believe you have to buy it for it to actually work but if you really need to port forward i recommend it cause its really easy to use(You don't even need to know your IP!)
Step 7: Good Luck
Hope you liked my Instructable!
(Tell me if you got it working or not)