Could you please provide more details? What is the issue exactly?
Which device acts as a server? Does that device have a public IP address?
Could you please share the configurations from both devices? Before posting it here, make sure you hide any sensitive information, such as IP addresses, passwords, etc.
Additionally, could you please execute the following commands from the command line, hide any sensitive information from the output, and share it here? Command line instructions are available here. Make sure you use ‘root’ as the username.
The FritzBox acts as the VPN Server. The struggle is, that I don’t know if my config is correct or not. When I enable VPN I would expect an error message or something in the LOG (UI) but there is nothing. Need to state, that I am not familiar with the router OS. Would the command line commands tell me if the connection has been established ? I checked but routing was still via Rutx11 LTE directly to the Internet. Could not reach the FritzBox. Would Wireguard be the easier option here ?
Will check on the command line commands during the week as the router is running in a camper van I don’t have access 24/7