OWASP Coraza WAF is a golang modsecurity compatible firewall library
Free UTM appliance: firewall, VPN, WAF and antivirus in one ISO.
Next Generation Open Source Firewall
Firewall log analyzer
Anti Spam SMTP Gateway
Prevent and Protect Your HTML5 Video, Music , Audio From Download Free
A client for the MikroTik RouterOS API protocol, written in PHP.
IOSec Addons are enhancements for web security and crawler detection
Detect Flooder IPs, Reduce Attack Surface against HTTP Flood Attacks
Lomalarga is a VPN-like service based on SSH and Linux.