Hi! I used to run Plex and forward a port through my vpn so I could access the service outside my network, like on vacation. This meant I could keep my vpn on and still access my content. I use Cloudflared to access other services in this way.
Now that my vpn has stopped allowing port forwarding, how can I again access my content while keeping my network private and secure?
You had your Plex open to the public with that setup. That's not secure at all, unless you wanted anyone to access it.
If you can port forward from your own IP and it's kind of stable, you can run a wire guard server to access your network and Plex.
If you can't portforward you can try a mesh network like tailscale.. there are other solutions as well. The fastest apparently is netwmaker, but you need to have a server with public IP. You can use a cheap VPS.
Tailscale would take less than 30 minutes to set up including software install and login on server and any client device (phone, laptop, etc). It uses wireguard, it just hosts the public part for connection management.