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VyOS is a firewall software and router platform that evolved from the Vyatta Core. Using a command-line interface, VyOS allows users to configure routing, switching, VPN services (including OpenVPN and IPsec) and firewalling. It is an open-source network operating system designed for integration into physical or virtual environments. Offering strong support for IPv4 and IPv6 routing protocols, VyOS can be deployed on low-resource embedded systems or scale upwards to handle more complex network setups in data centers or enterprise scenarios.