A: Follow these steps to try and get connected to the Minecraft server
- Restart your computer
 - Clear your DNS cache
 - Open command prompt with administrative privileges
 - Type: ipconfig /flushdns
 - Hit enter
 - Force update your client
 
- Restart your server
 - Undo any changes made through FTP
 - Ensure that you have the correct IP. Your ISP can change this without warning and you may be using an old IP address.
 
The Minecraft wiki also has a set of instructions on how to setup your router
Minecraft port forwarding
If you still can't connect to your Minecraft server
- Backup your server
 - Open server properties
 - Change the world name
 - Restart Server