Hi! In the article: http://www.shorewall.net/PortKnocking.html the link to http://www.soloport.com/iptables.html is broken. I would''ve sent in a patch, but I don''t know where this article is mirrored. ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d