KGateway is a frontend to configure IPChains & IPMasquerade. It is develop using Python, Qt, and KDE libraries. You can configure firewalls, In/Out/Forward rules, and IP Masquerading using an easy GUI interface. KGateway detects your language configuration and KDE enviroment, and installs nicely into KDE Network options.
You can download it from the following link: https://packetstormsecurity.com/files/download/10962/KGateway-1.0.tar.gz
Source: https://packetstormsecurity.com/files/10962/KGateway-1.0.tar.gz.html