OWASP Coraza WAF is a golang modsecurity compatible firewall library
A high-performance MySQL proxy
Antivirus eCAP adapter for Squid 3.1 and above.
A java PCAP and DPI library
Blocking and monitoring of network traffic based on geography.
One of the most advanced DNS Proxy and DNS Firewall in one product.
OWASP ModSecurity Core Rule Set (CRS) Project
LumoGate is a Windows Wifi Hotspot Management Software
A powerful network security tool, easy, safe and totally free.
PeerGuardian - a privacy oriented firewall application
network control and reporting
a secure, open source OS for use inside USEagency facilities
IDS + IPS for RouterOS (mikrotik)