CacheGuard Gateway

CacheGuard Gateway is a free, open-source network security appliance for startups, growing businesses, and SMEs/SMBs that need enterprise-grade protection without the complexity or cost.

Unlike pfSense or OPNsense which require plugins and significant expertise to reach feature parity, CacheGuard works out of the box. Install it on any x86 bare-metal machine or VM and your network is fully protected in under an hour.

CacheGuard-OS is not an app running on top of an existing OS. It IS the OS — a fully custom network appliance operating system built from scratch over more than 20 years, now fully open source on GitHub.

One ISO includes everything: firewall, VPN server, web antivirus, URL filtering, SSL inspection, WAF, reverse proxy, load balancer and QoS traffic shaping. No plugins needed, no compatibility issues, no surprises. Completely free for any number of users. Optional paid support available.

Source code: https://github.com/cacheguard/CacheGuard-OS