@yves_b, THANK YOU! The main Deco is the only device connected to the modem, and it was configured to obtain an IP via fixed allocation (not DHCP). I changed it to obtain a dynamic IP and also...

@David-TP thanks for your help. The main Deco (which is the only device connected to the modem) shows up in the "Choose from" list. That screenshot is below. The MAC address listed (ending in :20) is...

Hi, I'm trying to get my Deco M9 to work in IP Passthrough mode with my AT&T BGW320-505 router for port forwarding. Following a process I've seen recommended for this modem that instructs setting up...