About the author Dru Lavigne is the author of ONLamp.com's FreeBSD Basics column and has been an avid BSD user since FreeBSD 2.2.1. As an IT instructor, she specializes in networking, routing, and security. She is also responsible for ISECOM's Protocol Database, which can be found at http://www.isecom.org . Contributors The following people contributed their hacks, writing, and inspiration to t...