if it's a real concern that there will be people inside your network spoofing mac addresses.
then lock down the ports on your switch to only allow macs on given assigned ports.
if you;re concerned that malicious people will come into your building and plug in a random machine, then deactivate un-used switch ports. (and lock active ports to individual macs.
Another method would be to set a really low threshold for mac flapping. -though you'll have hours of head scratching if you forget about that later.
if you aren't on the same network segment then spoofing macs doesn't really work.
if you don't have a decent managed switch then it's not really possible to prevent.
This is the kind of thing that you can't really investigate at home properly. (or at least not with standard "home" type equipment.
then lock down the ports on your switch to only allow macs on given assigned ports.
if you;re concerned that malicious people will come into your building and plug in a random machine, then deactivate un-used switch ports. (and lock active ports to individual macs.
Another method would be to set a really low threshold for mac flapping. -though you'll have hours of head scratching if you forget about that later.
if you aren't on the same network segment then spoofing macs doesn't really work.
if you don't have a decent managed switch then it's not really possible to prevent.
This is the kind of thing that you can't really investigate at home properly. (or at least not with standard "home" type equipment.