... Gateway is distributed as an open source OS called CacheGuard-OS that you can install on a virtual or hardware machine of your choice. Once installed on a machine, CacheGuard-OS transforms that machine into a network appliance to implement as a gateway to the internet. In addition to the Web Gateway, CacheGuard-OS includes multitude of other services such as VPN, WAF and WAN optimization.
CacheGuard products are especially designed to address SME requirements by providing functional solutions.