[AFMUG] vehicle tracking systems and open WiFi hotspot

[Ken Hohhof]

Fast food franchise at tollway oasis had us set up an open guest hotspot as 
a Virtual AP on their Mikrotik, and we see random WiFi connections and DHCP 
leases for MAC addresses starting with 00:16:A4 and hostnames starting with 
UA followed by a bunch of numbers.  The WiFi signal is always low, 
around -90.

Doing some research on the web, I think this may be due to vehicle tracking 
systems,  I'm not sure if these are vehicles in the parking lot or whizzing 
by on the tollroad.  Also not sure if they are from the vehicle or the 
intermodal container it is carrying.

I'm not sure it is a big problem, we have the DHCP lease time set to 30 
minutes.

Has anyone else run into this, and if so, did you take any action?  I guess 
we could block connections from those MAC addresses, or maybe set a higher 
signal threshold to connect.  Or maybe we should just let them check their 
location or call the mothership or whatever they do.

BTW, don't say this is a DOS attack trying to exhaust the DHCP leases, they 
dribble in 1 or at most 2 at a time.  If we had the DHCP leases set to 30 
days, it could be a problem unless we expanded the pool.