I have a host name whose dns points to my home IP. I use this for game servers for my buddies. Should I be worried about my home IP being easily accessible like this, and should I get a physical firewall appliance to protect myself?
Servers are running Windows Server 2019 and Mac OSX.
Yes, don't expose Windows to the internet 😒
https://opnsense.org/ is a good system if you want an easy to install and open-source firewall.
Edit: no need to buy their official hardware. Any x86 system with two network ports will do.
It sounds like they're just exposing a game server, not windows.