In Linux, Iptables is a user space application program that allows a system administrator to configure the tables provided by the Linux kernel firewall (implemented as different Netfilter modules) and the chains and rules it stores (from Wikipedia)
The Iptables rules aren’t too complicate but if you don’t want to do it I suggest to use UFW .
Ufw was created to ease iptables firewall configuration, ufw provides a user friendly way to create an IPv4 or IPv6 host-based firewall.
There are two Gui for UFW :
the GTK+ : GUFW
KDE control module : UFW KDE
I compiled the KDE control module for KDE 4.6.5 under Debian Sid for AMD64
Fell free to download from here
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