Obligatory plugs http://www.onsight.com/ Onsight, Inc, Linux/Unix/Network Security Consultancy. http://www.buildinglinuxvpns.net/ Building Linux VPNs website http://lists.onsight.com/ "Linux Security: Tips, Tricks, and Hackery" weekly newsletter. http://www.hackinglinuxexposed.com/articles/ "Linux Security: Tips, Tricks, and Hackery" archives.