Hi there. 

My setup is as follows. I have a Mikrotik router with a Deco E4 set up as a main deco and 3 other deco's. I am setting up my Smart Home and I am using Home assistant. I would like to access it from outside my home and have done my port forwarding on the Deco E4, but it does not work as it is not the Internet facing router. I have tried to connect to my MikroTek router to try and set up DMZ as suggested on the Deco E4 troubleshooting, but cannot connect to the router ip address. Is there a way someone can guide me to set it up please? Should I first unplug the E4 from the router before trying to acces it? 

Thank you in advance for any help.

Kind regards

Guitarman1