WireGuard, Frustration
I tried everything. Tried every tutorial, every guide I could find, every variation between guides, but I just cannot do it.
This is not fun. There are no error messages, nothing I can debug, nothing I can do to find out where the issue lies.
I dont know where the issue lies and after trying for 4 days, I will have to admit defeat.
I guess Connecting through Wireguard Directly to a Device in a Homenetwork behind CG-NAT via DDNS just isnt possible.
WireGuard, Frustration
Okay, Wireguard you win. I guess I am giving Hetzner money to act as a bridge so you stop giving me the silent treatment.
re: WireGuard, Frustration
So apparently threatening Wireguard with giving Hetzner Money Worked.
I didnt change any settings, so my best guess is that the old "Have you tried turning (your client) on and off again" was the issue.
I still have to test it more, but now I have a Wireguard tunnel getting over IPv6 through CGNAT.
I still need to increase safety a bit more, by fully isolating the Server from the Rest of the Network, but now I can access it remotely.