Model :

Hardware Version : Not Clear

Firmware Version :

ISP :

Hello every one
I need to remote control a couple of devices in a country house.
I installed a Gateway connected to the router that I need to connect via DDNS and fort forwarding to an app on my iPhone.
I tested this configuration with a different router in another house and it works
But it is no working with a MR3420 v2 firmware version 3.16.9 Build 150319 Rel.60489n

This is what i've done

Dynamic DNS



Virtual server



Reserved IP for the gateway




Any suggestion?
Thanks a lot