@Tony Thanks for the hint, it was the MAC for main deco I input in ATT box setting. I finally managed it to work. It turns out that I was right to suspect it should be some other MAC of the same main...

@Tony Thanks for the response. After a few hours of digging, I believe the issue has something to do with the weird fact that main deco is not showing up in the devices list of BGW210. The main deco...

@Jets Thanks for the hint! Although I don't perfectly understand what this is all about, but a quick google regarding bridge mode makes all senses to me now. Unfortunately, my ISP modem/router (an...

My deco system is working in router mode and the main deco is connected to ISP modem/router via ethernet. I need to open a port for a service to run on my computer. If I'm understanding this right,...