If you forward a Port its usually forwarded from WAN to a LAN Device.
Per Default all Ports are blocked from WAN to LAN, as in your picture.
for ex:
You have a webserver running on a server in your network on the IP 192.168.1.4
To reach this server from the internet you have to forward eg Port 80 from WAN to LAN 192.168.1.4
the rule would be like:
FROM WAN forward PORT 80 to LAN 192.168.1.4
all other Ports are still blocked from WAN to LAN in this case
br
maxell182
