Minecraft Sever. No one but me can Join my sever?

[The Tadpole]

You need the WAN IP address, and in your router you need to set up port forwarding to forward the port 25565 to your computer. Follow the instructions:
- Find your router manufacturer and model number
- Go to http://portforward.com/english/routers/p...rindex.htm
- Click on your router's manufacturer
- Click on your router's model number
- Find and click on Minecraft
- Follow the instructions given
If your router is not on the list, try the closest one to your model number from your manufacturer, it'll have similar instructions.
If Minecraft isn't on your router's instructions tutorial, use another game except substitute that port for 25565 instead.