VyOS is a Linux-based operating system for routers and firewalls that allows you to configure all network functions via single unified command line interface just like in classic hardware routers. It includes static and dynamic routing (OSPF, RIP, and BGP), stateful firewall and NAT, various VPN options (IPsec, OpenVPN, PPTP, L2TP), DHCP server and more. The system is fully open source and extensible.