Leaderboard

If local port is different from external port, then local port is ignored and is made the same as the external port. I verified it with wireshark. I had to redirect external port to local port on my machine's firewall. I use wireguard on linux.

Maybe, you should connect to AirVPN through wireguard server on your home computer or a VPS. Make sure you don't nest wireguard in wireguard. You could route packets between two wireguard interfaces. Routing between two wireguard interfaces doesn't nest wireguard inside wireguard. Proton VPN has a feature named alternative routing which offers different entry points for people behind a restrictive firewall that prohibits connecting to VPN entry points. https://proton.me/blog/anti-censorship-alternative-routing