root@HANNIBAL-PC0:/home/surferbro# nmap -sP 192.168.1.1/24

Starting Nmap 6.00 ( http://nmap.org ) at 2014-11-05 15:04 CET
Nmap scan report for mygateway1.ar7 (192.168.1.1)
Host is up (0.00043s latency).
MAC Address: 00:1E:E3:CF:4F:02 (T&W Electronics (ShenZhen) Co.)
Nmap scan report for 192.168.1.2
Host is up.
Nmap scan report for 192.168.1.3
Host is up (0.0013s latency).
MAC Address: 00:1F:C6:3A:8E:32 (Asustek Computer)
Nmap done: 256 IP addresses (3 hosts up) scanned in 26.49 seconds