The community AP has password to associate with and then a captive portal with simple message and button to click to join. The AR150 was the first and only to associate with it. Subsequent attempts to connect the other 2 routers through the webgui fail with multiple browsers across Androids, iPhones, Linux and Windows desktops. Awhile back I’d heard something about DNS rebinding protection being the factor. There isnt a way to alter upstream records without violating terms of service. I think that I am in need of external DDNS or IDaaS. I will give GoodCloud a shot with the MT300Nv2. The AR750 I connected to ARRIS modem/router it was connected to before (got my service restored from ISP).