Free Open Source firewall -Firestarter PDF  | Print |  E-mail
It's built into Ubuntu 7 and 8 and it's a great way to setup a stateful inspection firewall for zero money and about 15' of your time on any Linux distribution and with hardware that will cost you less than USD 500.

Ask a typical Linux sysadmin and she'll say use iptables - which is true if you know what you're doing and have some time to fool around with it and get it right. One of our Linux clients recently asked us if there wasnt a better way and - truth be told there is

Firestarter is an Open Source program with a GUI for setup and configuration. It can be installed on a Linux desktop, server or on a dedicated box.

Firestarter features

  • Free
  • GUI based set up wizard
  • Real-time event monitor shows intrusion attempts
  • Enables Internet connection sharing, optionally with DHCP service for the clients
  • Allows you to define both inbound and outbound access policy
  • Open or stealth ports, shaping your firewalling with just a few mouse clicks
  • Enable port forwarding to LAN (easily!)
  • Whitelists and blacklists
  • View active network connections,
  • Advanced Linux kernel tuning features provide protection from flooding, broadcasting and spoofing
  • Support for tuning ICMP parameters to stop Denial of Service (DoS) attacks
  • Support for tuning ToS parameters to improve services for connected client computers
You can download it Here
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