Kaladix BlueShield is a high level firewall tool for configuring packet filtering, policy routing and traffic shaping / traffic policing under GNU/Linux.
With BlueShield you can easily create and maintain your statefull packet filter rules, apply policy based routing or shape and police traffic flowing through your firewall. All configurations are done in only one human readable file that supports templating and variables.
This is site is work in progess, but all downloads and documentation is there
