I know its not ideal for a server, but I've seen it done myself and even tried it so I know it can work, even if a little laggy
So does anyone have any ideas how I would do what I am trying to?

Hello everyone, I recently bought a Raspberry pi Model B and I'd like to use for various things, including to host a Minecraft server. I've been able to host an online server with the help of tutorials, but the problem is that I'd like to host a normal LAN server that can only be accessed on the net...