Introducing Firestarter

Firestarter is a complete firewalling tool for Linux. Use the firewall creation wizard to create a basic firewall, then streamline it further using the powerful dynamic rules modifiers. Open and close ports with a few clicks, or stealth your services giving access only to a select few. Watch the real-time hit monitor as attackers probe your machine for open ports, in vain. Firestarter takes full advantage of GNOME but will work in most environments.