Gatekeeper Pro™ is a personal security server that provides corporate level security yet fits into the palm of your hand. It protects your PC from the outside while connected to a network. Packed with a robust hardened operating system and best-of breed security software Gatekeeper Pro model sole purpose is to protect computer from all Internet threats. Gatekeeper Pro features “Pass-through Mode” connection to a wired network through its Ethernet Network Ports.