LuLu is the free open-source macOS firewall
Next Generation Open Source Firewall
OpenWRT ©VMWare ©ESXi Appliance NAT router
PeerGuardian - a privacy oriented firewall application
360-FAAR Analyze FW1 Cisco Netscreen Policy Offline Using Config/Logs
KnockIt! is a port Knocking tool for MAC OSX
IoT Device, Gateway, Server platform
Detect Flooder IPs, Reduce Attack Surface against HTTP Flood Attacks