BadTuxWall will help you to implement your own firewall on a Linux operating system using an efficient graphical user interface. It also allows you to generate iptables scripts, export them and share them with friends.
TEF is a fully-featured, secure and has advanced capabilities including the intuitive Xsentry easy-to-use administration graphical user interface with WYSIWYG (What You See Is What You Get) front end which has drag and drop security policy deployment.