Intelligently block brute-force attacks by aggregating system logs
Firewall log analyzer
Anti Spam SMTP Gateway
A simple, portable port scanner
Create and delete block rules for the Windows firewall
ipset set listing wrapper script
360-FAAR Analyze FW1 Cisco Netscreen Policy Offline Using Config/Logs
Programmable completion code (bash) for ipset (netfilter.org)
High interaction honeypot solution for Linux based systems
Easy to use firewall for linux beginners.
iptables web interface
Server and Client applications for testing network connectivity.