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BackTrack 5 Cookbook by David De Smet, Willie Pritchett

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Identifying active machines

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.

How to do it...

Let's begin the process of locating active machines by opening a terminal window:

  1. Using Nmap we can find if a host is up or not, shown as follows:
    nmap -sP 216.27.130.162
    
    Starting Nmap 5.61TEST4 ( http://nmap.org ) at 2012-04-27 23:30 CDT
    Nmap scan report for test-target.net (216.27.130.162)
    Host is up (0.00058s latency).
    Nmap done: 1 IP address (1 host up) scanned in 0.06 seconds
    
  2. We can also use Nping (Nmap suite), which gives us a more detailed view:

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