One command to rule them all!

sudo apt-get install nmap tcpdump ngrep etherape ethereal ettercap kismet aircrack john airsnort dsniff hping3 fragroute arpwatch nessus nessusd openssh-server netcat whois perl python ruby airsnort ntop iptraf nbtscan tor privoxy nikto cheops-ng stunnel fping tcptraceroute firestarter socat vncviewer wordlist anon-proxy network-manager network-manager-gnome

After that you should have a workstation capable of being used for GOOD in the hands of a security admin.