[CentOS] pastebin service with office LAN and not exposed to the Internet

Thu Jun 21 12:47:31 UTC 2012
John Doe <jdmls at yahoo.com>

From: Kaushal Shriyan <kaushalshriyan at gmail.com>

> i would like to set a pastebin server within my organization in LAN is
> there a step by step guide to configure and install on CentOS 5.8?

First, where do you find the pastebin software/code...?