I want to host a small game server for friends and myself in my home but doesn't want to open up the firewall. Any tunneling solutions supports UDP? Thnaks.
You might try ZeroTier. You'll each need a tiny client app, but its super easy to install and setup, and extremely secure. Free to use with up to 25 devices.
For non tech savy people, is ZeroTier easier to config than Tailscale? I tried Tailscale and everyone needs a account before start playing, which can be a fraction.
Im not sure how difficult it is to setup a Tailscale client, honestly.
The Zerotier setup is just installing and joining a network by an id. The Windows version has a bit of a GUI, where you have to right-click on a status bar icon, click Join network, paste in the id and join. The Linux version of the client has a cli, which is imho even better, as you can just send them a whole command to copy into the terminal.
I admin a Zerotier network for a bunch of kids that wanna play Minecraft, and they havent had many problems setting up.