Great stuff, although very verbose. It learns you a lot of stuff that's already configured if you are able to connect to the internet. Currently not many people are using these advanced features. This has several reasons. While the provided documentation is verbose, it is not very hands on.
Traffic control is almost undocumented.
2.4 Housekeeping notes There are several things which should be noted about this document. While I wrote most of it, I really don't want it to stay that way. I am a strong believer in Open Source, so I encourage you to send feedback, updates, patches etcetera. Do not hesitate to inform me of typos or plain old errors. If my English sounds somewhat wooden, please realise that I'm not a native speaker.