Is there a way to discover what subnet a device is using?

[Ken D'Ambrosio]

On 2020-03-05 08:01, Chris Green wrote:
> So is there any tool that I can install on my laptop which will try
> and get some sort of response from the WD box and help me identify the
> IP address?

Your best bet: plug the laptop and the WD box straight into each other, 
and use Wireshark to sniff traffic (be sure "promiscuous" is set!).  
It'll likely do *something* when it comes up, like try to check for an 
NTP server or something.  The being-plugged-into-each-other is 
important; merely being on the same switch won't work, as the switch 
will be smart enough to not send unicast packets on all interfaces, so 
your laptop won't see them.  (There are ways around that, but far easier 
just to plug straight into each other.)

Good luck!

-Ken