There's not much here, like the title suggests it's just a playground.

Some code that might be of interest:
PortKnocker.txt: a basic Port Knocking Daemon written in Perl.
IPAdd.txt: a Perl script to add a list of additional IP addresses to eth0
open_basedir.txt: a Perl script to turn off open_basedir restrictions for all domains on a Plesk 8 or 9 server.