Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Vyatta manufactures an open source router/firewall/VPN product for Internet Protocol version 4 (IPv4) and IPv6 networks. A free download of Vyatta has been available since March 2006. The system is a specialized Debian-based Linux distribution with networking applications such as Quagga, OpenVPN, and many others. A standardized management console, similar to Juniper JUNOS or Cisco IOS, in addition to a web-based GUI and traditional Linux system commands, provides configuration of the system and applications.