The Vault is a small form factor PC built for use as a network appliance that can be loaded with an Operating System (OS) for firewall / routers, hypervisors, or many other applications . The FW4C is based on a 4x 2.5 Gbps network port design that leverages a low power, but versatile Intel Pentium J3710 CPU. This CPU supports AES-NI, Intel’s Hardware Acceleration for Encryption. The Vault uses standard Intel components (including Intel network ports) which results in compatibility with a variety of operating systems, including a number of open source firewall projects. The Vault is fanless so it has no moving parts, which results in an incredibly durable platform that can be used in less than ideal environments. Its all aluminum enclosure (no plastic here) is a giant heat sink, keeping the CPU cool.
For more information on tested OS compatibility with the Vault, please see this link.