I'm new to Zywall USG 20W but have never had this issue with other routers including Zywall 2 Plus.
I have ports forwarding to a DVR. I can view the DVR from anywhere in the world using »*ip-address-here*:*port-number-here*/
Anywhere other than on a computer on my own USG 20W LANs (LAN1, LAN2, WLAN1, etc.)
I'm created a service called DVR that specifies the desired port.
I have NAT type virtual server, interface WAN1, original IP any, mapped IP to my DVR, both ports set to my DVR service.
And I have a firewall rule to allow my NAT through form anywhere sending this port's traffic to my DVR.
it works form the outside world but not from within? What am I doing wrong?