OpenSnitch is a GNU/Linux port of the Little Snitch firewall
A firewall for humans.
CacheGuard Gateway is a UTM, a WAF, and a QoS management appliance.
Anti Spam SMTP Gateway
Share a VPN connection with VMs or containers
Small Content Filtering And Web Acceleration Appliance
High-performance WAF built on the OpenResty stack
High interaction honeypot solution for Linux based systems