Over the years we have moved from system to system and along the way we have lost some of our content.  We've been making an effort to find some of it and make it available on the web again.  Here is a presentation that Stephan Schonberg did back in 2001 before we were using any kind of CMS system.  Consequently it is in a bunch of seperate HTML files, so I just linked to it directly.

Here it is:

 An Introduction To Linux Network Security