Finding yourself on the Foobanizer9000, a computer built by 9000 foos, this computer is so complicated luckily it serves manual pages through a network service. As the old saying goes, everything you need is in the manual.
$ nc moar.ctfcompetition.com 1337
The manpage lets you execute commands when prefixed with !, so you can list files and will notice the following file that you can read out:
!cat /home/moar/disable_dmz.sh
flag: CTF{SOmething-CATastr0phic}