HTTP proxy to block ads and customize webpages
Next Generation Open Source Firewall
Anti Spam SMTP Gateway
OWASP ModSecurity Core Rule Set (CRS) Project
High-performance WAF built on the OpenResty stack
IOSec Addons are enhancements for web security and crawler detection
Easy to use firewall for linux beginners.
Lomalarga is a VPN-like service based on SSH and Linux.