For the very first time i tried to selfhost a static site (lighttpd + duckdns) but I’ve failed… Is it even possible to selfhost a static site from “router 2” while i’m behind two routers? “Router 1” is from ISP and i have no possibility to change any settings except subnet, standard gateway, dhcp on/off and DMZ. -> no port forwarding. "Router 2 is Asus with port-forwarding available and i’m using an OpenVPN configuration on it (if that matters). DuckDNS could see the external ip from R2, but i couldn’t access it.
I’m actually behind 3 routers and still hosting stuff to the internet. My house is behind cgnat, I have two isp routers, which both connect to a pfsense router (ip of which is in the dmz of each isp router).
My pfsense router and a free vps hosted at oracle are both connected via tailscale. Pfsense router advertises specific subnet addresses to the tailnet. VPS uses caddy to reverse proxy to those subnet addresses to expose them to the internet.