identification icon

I'm currently trying to work around internet outage issues & when trying to use a USB phone-modem for internet I noticed on the [Network Map] page where it's saying it's connected (even though it can't be used) there's an icon next to the DDNS Name that looks like a Padlock with the securement...

Ok, My OCD is getting the better of me here.... I have an RT-AC68U with Merlin's Firmware:380.57 installed. I have noticed my Connected Client List shows the devices connected with an Icon next to their other details. This Icon might be an Apple Logo, Sony Logo, Tablet or Phone or even in the...