Clicking on the genlist menu item in Backtrack Linux opens a terminal window and outputs the genlist help menu at the top. Genlist is a Perl script written to provide an easy way to generate a list of live hosts on a network or set of networks so you can then begin analyzing those hosts. All the genlist Perl script does is call nmap with the -sP switch and parse the results so only the live IP addresses are output and as simple as it seems its a handy little tool if you do penetration testing on a regular basis. Below we describe genlist in more detail and show an example of genlist in action.
TCtrace is like a brother to itrace and traceroute but it uses TCP SYN packets to trace. This makes it possible for you to trace through firewalls if you know one TCP service that is allowed to pass from the outside. Once again its a very simple tool like the last few I have reviewed and it has one specific function.
The next tool I am going to look at is a really great ruby script written by my friend Carlos (Dark operator) Perez. Its called Dnsrecon and is included in Backtrack 4. This is a simple tool written for target enumeration during authorized penetration test engagements. This tool provides different methods for enumerating targets via DNS service.