Asus RT-AC88U Port Forwarding WAN Issue

Hi everyone, I need some help regarding port forwarding using a ASUS RT-AC88U router. I set a static IP address on a Web Power Switch that I am trying to access over the Internet. I configured port forwarding in the router with the IP address of the Web Power Switch to Port 80, and set the Protocol for both TCP and UDP. I also set up DDNS using myname.asuscomm.com.


When I use a computer on the same LAN as the Web Power Switch, I can ping and connect to the switch using the local IP address...

Asus RT-AC88U Port Forwarding WAN Issue