AntiTamper Network with Mac ID

[equalizer]

Hi.
I think someone is tampering with a network.  Is it possible to read the Mac address of a remote device.

Im currently using "local res = os.execute('ping -c 1 -W 1 ' .. ip)" but ping failing for few minutes does is not reliably telling me a device being swapped out reliably.

Hope there is a easy solution :-)

Robert.

[admin]

This should be done on your router. But MAC address can be easily changed on most devices so this method is not reliable.