Virtual Private Network (Vpn) - Matrix SPARSH VP710 User Manual

Virtual Private Network (VPN)

Virtual Private Network is a secured private network connection built on top of the public telecommunication
infrastructure, such as the Internet. It has become more prevalent due to the benefits of scalability, reliability,
convenience and security. VPN provides remote offices or individual users with secure access to their
organization's network. Image
There are two types of VPN access:
• Remote-access VPN
• Site-to-Site VPN
Remote-access VPN: Remote-access VPN connects an individual device to a network. It allows employees to
access their company's intranet from home or outside the office.
Site-to-Site VPN: Site-to-Site VPN connect two networks together.It allows employees in geographically separated
offices to share one cohesive virtual network.
VPN can be also classified by the protocols used to tunnel the traffic. It provides security through tunneling
protocols: IPSec, SSL, L2TP and PPTP.
VPN Technology
IP phone supports SSL VPN, which provides remote-access VPN capabilities through SSL.OpenVPN is a full
featured SSL VPN software solution. It creates secure connections in remote access facilities, designed to work
with the TUN/TAP virtual network interface.
TUN and TAP are virtual network kernel devices. TAP simulates a link layer device and provides a virtual point-to-
point connection, while TUN simulates a network layer device and provides a virtual network segment.
IP phone use OpenVPN to achieve VPN feature. To prevent disclosure of private information, tunnel endpoints
must authenticate each other before secure VPN tunnel is established.
642 Matrix SPARSH VP710 User Guide