I know cloudlfare and other cloud providers often provide geoblocking features if you host with them.
Does anybody know of any similar foss packages for us self-hosters?
I know I don’t have any need for somebody outside of my country to access my server, so geoblocking IPs would be a great security feature.
It depends on what specific thing you want to add geoblocking to, but often something like the MaxMind GeoIP database, which then can feed into a firewall to pre-emptively geo-block at a connection level, or as part of e.g. nginx geolocating the IP a of the connecting IP then making the blocking decision at request time.
There’s a project that works with Traefik’s forward-auth middleware to do this, which is probably how I would go about it if I wanted it at an HTTP level.
Yep SWAG reverse proxy (which uses ngjnx) can use Maxmind for geoblocking pretty easily