Use arp-scan to find hidden devices in your network

If you have a device that is on the same network but not responding to any requests such as ping, HTTP, HTTPS etc…

Installation:

apt-get install arp-scan

Scan it:

arp-scan --interface=eth0 --localnet

Here, –interface=eth0 represents the interface to use for scanning, and –localnet makes arp-scan scan all possible IP addresses on the network. You can omit the –interface option, in which case arp-scan will search the system interface list for the lowest numbered, configured up interface.