Assuming the user will not be connecting over vpn, but is both remote and non-technical, how would you expose Jellyfin to them securely?
At the very minimum stick a reverse proxy in front like caddy, nginx, or Traefik. Then have some middleware like crowdsec to inspect what’s going on. Then whitelist the IP or the country IP block.
There is much more but those would be the bare minimum.
Reverse proxy with auth in front of the actual jellyfin login. Like pangolin.
Possibly mTLS, which you’d configure in your reverse proxy. You could email them the certificate and instructions on installing it. I believe for Chromium browsers on Windows you basically just double click the cert and click through the wizard. Firefox I know has a thing in the settings for importing the cert. Android you just tap on the cert and make sure it opens with ‘Certificate Installer’ if it gives you the option.
I recently did exactly this. Only works with the web UI, no apps support it, but working well and those without the cert just get a 400 error. Not sure if non technical tbh, since you will get warnings when adding your root certificates to any device, and that might scare some who don’t understand what it does.
Also set it up through wireguard, so can punch out of double NAT.

