@Xexus Ok, so it's not that easy to figure out. the question is whether you must consult with those who have SSTP and AnyConnect VPN and ask if they can see anything in the logs. on TP-Link there...

@kogan there is no doubt that there is something that is not quite as it should be with your network, but now I wanted to test a little more here and I adopted an EAP653 here to labbing a little...

@Xexus SSTP use port 443 and problaby do Anyconnect the same so there should be no problem to get this thrue your router. what firmware version is installed on your ER605?

@Clive_A

@Clive_A Yes, it is possible that there is an error on the wg server, but then this error is only against TP-Link routers. I have a connection to the wg server from mobile phones, PCs and unifi...

@Clive_A OK , if you have succeeded, there is hope, but have you tried against a wireguard server or have you only connected to other TP-Link routers? I have experienced that it works against other...