Before attempting a pentest, we first need to identify the active machines that are on the target network range.
A simple way could be by performing a ping on the target network. Of course, this can be rejected or known by a host, and we don't want that.
Let's begin the process of locating active machines by opening a terminal window:
nmap -sP 18.104.22.168 Starting Nmap 5.61TEST4 ( http://nmap.org ) at 2012-04-27 23:30 CDT Nmap scan report for test-target.net (22.214.171.124) Host is up (0.00058s latency). Nmap done: 1 IP address (1 host up) scanned in 0.06 seconds