Hello

Would appreciate any help - I have been trying to set up port forwarding on my home network but without any success.

Model of network: ADSL2+ modem -> Main Deco -> 2 other deco connected in mesh

Main computer is connected via ethernet to Main Deco.

I think there is a double-NAT set up (main deco receives an internal IP address) which I am unable to get around by setting up the Main Deco as DMZ host. 

I have forwarded ports on the deco app to the main computer (which receives a static internal IP 192.168.68.110) and the same ports on the modem.  I have also tried de-activating the ADSL modem firewall and have activated UPnP on both the modem and deco system. 

I can't figure out what I'm missing - thanks for your help!