@Joseph-TP  So I then looked at your second link and this caught my eye "1) If it is not a public IP address, it means there is another router or NAT in front of the TP-Link router, which blocks the VPN connection, you will need to open a service port on the front router or NAT device for the VPN connection, and then change the private WAN IP address to your real public IP address in the .ovpn file (for OpenVPN) and .conf file (for WireGuard VPN)." You also asked about network topology, so I use this ISP in Hyderabad, India called ACT Fibernet. They basically pull an ethernet cable into your house, which is then directly plugged into this TPLink router. It is a PPPoe type of connection, userid and pwd for which is saved in the wifi router. So what might be happening is that there is another router on a pole somewhere on the street from where they pull these ethernet cables into several customers houses. I obviously will not have access to that to do open a Port. So I am out of luck it looks like.