I just setup a minecraft server on an old laptop, but to make it acessible i needed to open up a port. Currently, these are the ufw rules i have. when my friends want to connect, i will have them find their public ip and ill whilelist only them. is this secure enough? thanks
IP white lists and firewall exceptions will help, but exposing ports on your home router is almost always a bad idea, especially for something as trivial as a game server.
I would highly recommend Tailscale. It's free for up to 3 users, and if you have more friends than that, I would have them all sign up with free accounts and then share your laptop device with their tailnets.
It's very easy to setup and use, costs nothing, and will be far more secure than opening ports and trying to set up IP white lists, protocol limitations, etc.
Tailscale creates something called an "overlay network" it's basically a virtual LAN that exists on top of your real network and can be extended to other people and devices over the internet. It's fully encrypted, fast, and like I said, very easy to set up.
?...It's a great tool that provides all the security of VPN access without having to struggle with the more technical aspects of spinning up your own VPN, and it's zero cost for personal use.
You could also use Netbird if you wanted, but I have been using Tailscale extensively and it's awesome.