dhcpcd-discuss

On 15/06/2020 12:15, Stuart Henderson wrote:
> On 2020/06/13 17:30, Bruce Ferrell wrote:
> > I'm in the process of tracking down the MAC address of all the android
> > devices... Like my Amazon smart plugs.  They don't to respond to pings so
> > it's an interesting issue to track down.
>
> btw, for this you might like the program called "arp-scan".

There is a known issue with some Pi boards where they don't respond to ARP 
requests either unless the interface is in promiscous mode.
There is a recent thread on this list about it.

I also have parpd, a Proxy ARP Daemon.
https://roy.marples.name/projects/parpd/

You could set this do proxy a subnet outside your real one and run it in debug 
foreground mode.
It will log all incoming ARP requests along with the MAC address of the sender.

Roy