Beryl AX - Setting up Wireguard Client fails

[newHere88]

Hello everyone, I know I must be doing SOMETHING wrong but I cannot quite figure out what my mistake is. I am using a FRITZ!Box 7590 as my home ISP router as well as my Wireguard Server that I wish to connect to while traveling with my newly purchased Beryl AX router (literally arrived an hour ago).

So what I did was naturally I set up the Wireguard server on my Fritzbox and downloaded the config to upload on my Beryl as the Wireguard Client but this always seems to fail. As Endpoint I am trying to use the myfritz DDNS address. Is this the way to do it or is this a mistake?

Attached a screenshot of my config if this helps anyone. I blacked out most of it maybe I am too paranoid but all that info was essentially spat out by my Fritzbox except for the endpoint. That was not generated at all.

[Tagor]

"Gnat" is likely a typo for Carrier-Grade NAT (CGNAT), which is a technology that allows internet service providers (ISPs) to conserve limited IPv4 addresses. With CGNAT, multiple customers share a single public IPv4 address by translating their private IP addresses to the shared public one at the ISP's network. This is often seen in the context of IPv4 exhaustion and the ongoing migration to IPv6.

I had same Issues and told the ISP (1&1) to switch of IPV6 and give me back IPV4 again.
Called them Sunday and Monday its was done. Solved all Issues.