I use the built-in l2tp server in ER8411 to connect to it from the outside. The client is Windows 10. There are no problems with pptp and openvpn running on the er 8411.

Hello, I'm asking for your help, I hope I can get some advice. I need to set up a connection to the l2tp server. But judging by the logs, the tunnel is not being formed. The ER8411 is located behind...