I noticed two unknown entries in the connection history of my Asus router last Saturday, and subsequently changed the network passwords for the main SSID and the two sub-SSIDs which are more limited, and each intended for a specific device, a radio and a printer, which have more limited access to the local networks.

I bonded the MAC address of the printer and radio to their respective SSIDs, and changed those passwords too to something that’s very strong, in each case.

But for the main SSID, the main wireless access, I really hesitate to list and hard-bond all known MAC IDs of our equipment, but I might have to: one of the two ‘unknown’ IDs, called ‘Intel Corporate’, has been able to connect since Saturday, I can see from looking at the ASUS history today.

Annoyingly, the ASUS interface does not give any details about ‘Intel Corporate’ except the name – if it gave the MAC, I could set the router to reject it.

The only way I can find the MAC is to sit in front of the ‘currently connected’ ASUS panel and wait for it to come up, which is not realistic.

Is there some software or technique I can use to find out more about this apparent intruder? I figured at first that it might be a legitimate device, but a process of elimination on Saturday indicates that it is not anything that I own.

Hard-coding device MACs for the main network is really a ‘nuclear’ option for me, and I’d like to avoid it.