Firewall

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Guarddog is a firewall configuration utility for Linux systems. Guarddog is aimed at two groups of users. Novice to intermediate users who are not experts in TCP/IP networking and security, and those users who don't want the hassle of dealing with cryptic shell scripts and ipchains/iptables parameters.

* Easy to use goal oriented GUI
* Application protocol based

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Firewall Builder consists of an object-oriented GUI and a set of policy compilers for various firewall platforms. In Firewall Builder, firewall policy is a set of rules, each rule consists of abstract objects which represent real network objects and services (hosts, routers, firewalls, networks, protocols).

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Firestarter is a complete firewall tool for managing an observing your machine. It features an easy to use firewall wizard to quickly create a firewall. Using the program you can then open and close ports with a few clicks, or stealth your machine giving access only to a select few. The real-time hit monitor shows attackers probing your machine.