A system for stealthy authentication across closed ports, communication in which information arrives encoded in the form of connection attempts to closed ports.
PktFilter is a software that can configure the IP filtering device driver found in Windows 2000/XP/Server 2003, with filtering rules following a syntax similar to IP Filter
combines Comodo's sturdy firewall and state-of-the-art antivirus protection in one suite. Defends your PC against 1 billion executables including viruses, root kits, Trojans, and zero-day attacks. And even with all these great features, CIS is free. Users are also asked to install the Comodo SafeSearch and Ask.com toolbars, so be careful.
"A (growing) collection of on-line wizards - for creating complex linux configuration files and scripts using simple web-enabled point-and-click methods. LinWiz://SimpleFirewall was the first of these - launched in March 2003, now replaced by LinWiz://PersonalFirewall and LinWiz://ServerFirewall."