DNS Version Request

 # nmap -sUV -p53 scanme.insecure.org

Starting nmap 3.50 ( http://www.insecure.org/nmap/ )
Interesting ports on scanme.insecure.org (205.217.153.55):
PORT   STATE SERVICE VERSION
53/udp open  domain  ISC Bind 9.2.1

Nmap run completed -- 1 IP address (1 host up) scanned in 0.948 seconds

Some companies run an interesting "version" of Bind:
Playboy.Com  "Move on, I'm already patched. kthxbye."
Altria.Com "You are not cleared for that information"
Sans.Org/Giac.Net "All accesses are logged"