@Xexus A short comment before I go to work, check route details on Anyconnect VPN. is it like this is full tunnel and resurs outside tunnel is not aviable..

@Clive_A It looks like a scan has been made against the WAN ip from the LAN on the router, then there will be a similar result. I have seen several others do this and they complain about the router...

@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