I was wondering if there is a solution as my server is always griefed when i make Bungee server The "Hacker" is only needed to know my ip address from my sub server and then create his bungee then add my server info and connect through his bungee on my server and grief Is there any solution for this Thanks in advance
Firewalls. There is even a tutorial on how to set these up on the bungeecord wiki https://www.spigotmc.org/threads/1-8-1-11-bungeecord.392/ If your Spigot servers are hosted on the same machine as your BungeeCord, you should setup your servers so that they only listen to the localhost (127.0.0.1). That way they can't even be joined directly from outside.