Additional ports can be helpful if you're setting up a plugin like Votifier or Dynmap that requires a port to be open!
How to add a port...
Go to the Additional Ports menu, by clicking either of the boxed options on your server's panel page
Click Add Port on the left
The table will show your new port number, in this example my port would be 8178
You can repeat this in order to get a maximum of 3 additional ports
Configure your plugin to use the port number in it's config file. If the plugin asks for an IP address to bind to, this would be 0.0.0.0. Then, the port will be accessible through your server's IP, for example if your server IP is 12.34.56.78:25578 then you will be able to access a plugin running on port 8178 through 12.34.56.78:8178
How to add a port...
Go to the Additional Ports menu, by clicking either of the boxed options on your server's panel page
Click Add Port on the left
The table will show your new port number, in this example my port would be 8178
You can repeat this in order to get a maximum of 3 additional ports
Configure your plugin to use the port number in it's config file. If the plugin asks for an IP address to bind to, this would be 0.0.0.0. Then, the port will be accessible through your server's IP, for example if your server IP is 12.34.56.78:25578 then you will be able to access a plugin running on port 8178 through 12.34.56.78:8178
Updated on: 19 / 02 / 2021