nmap

nmap versions lower than 5.30BETA1: nmap -sP 192.168.1.* newer nmap versions: nmap -sn 192.168.1.* This gives me hostnames along with IP adresses, and only pings the hosts to discover them. This will only give you the hostnames if you run it as root. EDIT: As of Nmap 5.30BETA1 [2010-03-29] -sP has been replaced with -sn … Read more

If you’re using nmap, MAC addresses are only available if you’re on the same network segment as the target. Newer versions of nmap will only show the MAC address to you if you’re running as root. i.e.: sudo nmap -sP -n 192.168.0.0/24