Free UTM appliance: firewall, VPN, WAF and antivirus in one ISO.
Powerfull Web Application Firewall for PHP
Webinterface to (un)ban IPs in Fail2Ban
A client for the MikroTik RouterOS API protocol, written in PHP.
Open source voucher management / hotspot system
Manager Update Platform/Packages for pfSense Multisite
IOSec Addons are enhancements for web security and crawler detection
a secure, open source OS for use inside USEagency facilities
Detect Flooder IPs, Reduce Attack Surface against HTTP Flood Attacks
Lomalarga is a VPN-like service based on SSH and Linux.