OWASP Coraza WAF is a golang modsecurity compatible firewall library
A firewall for humans.
A simple, portable port scanner
This Tool blocks a Mass of IP's via the Windows Firewall - IP Blocker
OPNsense is an open source, easy to use firewall and routing platform
360-FAAR Analyze FW1 Cisco Netscreen Policy Offline Using Config/Logs
A client for the MikroTik RouterOS API protocol, written in PHP.
flex-fw is a small and fast console frontend to iptables