Firewall able to analyze visitor behavior & provide adapted response
Next Generation Open Source Firewall
Intelligently block brute-force attacks by aggregating system logs
Free UTM appliance: firewall, VPN, WAF and antivirus in one ISO.
Firewall log analyzer
Network Security Appliance Linux Distribution
Robust and flexible VPN network tunnelling
Anti Spam SMTP Gateway
A simple, portable port scanner
ipset set listing wrapper script
Powerfull Web Application Firewall for PHP
Programmable completion code (bash) for ip[6]tables (netfilter.org)
Webinterface to (un)ban IPs in Fail2Ban
Network Firewall Linux Kernel Module with Conflict Resolution Engine
Open source voucher management / hotspot system
bash programmable completion for conntrack-tools (netfilter.org)
pfck - pf check - organizes flow information by host
IOSec Addons are enhancements for web security and crawler detection