...To obtain a CacheGuard appliance, download CacheGuard-OS and install it on the bare-metal or virtual machine of your choice.
CacheGuard UTM is a firewall, a VPN server, a filtering proxy, and a WAF (Web Application Firewall). In addition, it provides WAN optimisation features. CacheGuard UTM is specifically designed to meet organisational requirements by offering functional and easy-to-manage security solutions.
CacheGuard-OS is distributed as a free and open-source operating system. It is based on the Linux kernel and primarily utilises NetFilter, IPRoute2, OpenSSL, StrongSwan, ClamAV, Squid, Apache, ModSecurity, and numerous other well-known open-source components.