Relaying Traffic to Self-Host with CGNAT

This video started as the answer to a simple question - how can I self-host a service for my friends and family, behind cgnat, without requiring them to install any apps (like tunnels)? This video turned into a bunch of different ways to proxy IPv4 to IPv6, so you can receive IPv6 traffic natively and bring in legacy traffic from a VPS which does have public IPv4.
While I’m giving you a lot of different examples and methods here, you can mix and match a lot of them to fit your needs.