This issue’s DVD comes with the BackTrack 5 R1 [1][2][3] pen test distribution. BackTrack provides a great collection of pen testing and security auditing tools. You can boot into BackTrack Live from the DVD or install BackTrack permanently on your hard disk.
BackTrack, an Ubuntu-based penetration-testing distribution, offers "major improvements" over previous releases, including support for 32- and 64-bit architectures, KDE 4, Gnome, and Fluxbox.