Setting velocity/proxy server

Start the server and when it has finished installing, Navigate to the velocity.toml file via the file manager.
Enable Private IP on the backends
You should see the private ip for your backend server on the network tab
Go to your proxy, and scroll down until you see the [servers] list
Copy the IPs to your backend servers, and add them like this for example:
Search for player-info-forwarding-mode, and change this to modern

Navigate to your Minecraft PaperMC Server
Go to the folder, config → paper-global.yml
Press CTRL+F if you are on a windows machine, and search for velocity
Change enabled: false to true and add the secret of which we had copied earlier from the proxy server.
Navigate to server.properties and change online_mode=true to false.
Last of all, Go to the bukkit.yml file, and change connection_throttle = 4000 to -1.

Connect to your network server via the proxy server and enjoy!