I recently set up a CentOS Linux OpenVPN server for a small office, and this is a complete howto writeup of the process. These instructions contain everything you need for configuring the server (including firewall rules!). Also included are complete instructions for setting up both mac and windows client machines.
howto
Small Office Linux OpenVPN Server
Submitted by philiph on Sat, 02/19/2011 - 18:46(via www.hollenback.net)
Making your Linksys WRT54GL wireless router open source with dd-wrt
Submitted by philiph on Tue, 01/20/2009 - 14:51(via www.hollenback.net)
I finally got around to upgrading my Linksys WRT54GL home wireless router to an open-source firmware, dd-wrt. This was more confusing than it should have been, mainly due to the large number of options available for wireless router firmwares. However, once I got that all sorted out the actual install was surprisingly easy and satisfying. This howto contains my notes on that process.
Using LVM to migrate a CentOS system to a mirrored RAID
Submitted by philiph on Mon, 01/19/2009 - 02:34(via www.hollenback.net)
I recently had to migrate a CentOS 5 system from a single hard drive to a mirrored RAID configuration. Since I had set up the system with LVM originally I was able to do this (mostly) seamlessly while the machine was in production. This howto details the steps I took and the commands necessary to migrate the system.