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Руководство администратора Страница: 272

Yealink CP860 [272/417] Procedure

Administrator’s Guide for CP860 IP conference phones

260

Remote-access VPN allows employees to access their company's intranet from home or

outside the office, and site-to-site VPN 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.

IP phones support SSL VPN, which provides remote-access VPN capabilities through SSL.

OpenVPN is a full featured SSL VPN software solution that creates secure connections in

remote access facilities, designed to work with the

TUN/TAP

virtual networking 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 phones use OpenVPN to achieve the VPN

feature. To prevent disclosure of private information, tunnel endpoints must authenticate

each other before secure VPN tunnel is established. After the VPN feature is configured

properly on the IP phone, the IP phone acts as a VPN client and uses the certificates to

authenticate the VPN server.

To use VPN, the compressed package of VPN-related files should be uploaded to the IP

phone in advance. The file format of the compressed package must be *.tar. The

VPN-related files are: certificates (ca.crt and client.crt), key (client.key) and the

configuration file (vpn.cnf) of the VPN client. For more information on how to package a

TAR file, refer to

OpenVPN Feature on Yealink IP Phones

, available online:

http://www.yealink.com/DocumentDownload.aspx?CateId=142&flag=142.

Procedure

VPN can be configured using the configuration files or locally.

Configuration File

y000000000037.cfg

Configure the OpenVPN feature

and upload a TAR file to the IP

phone.

Parameters:

network.vpn_enable

openvpn.url

Local

Web User Interface

Configure VPN feature and

upload a TAR package to the IP

phone.

Navigate to:

http://<phoneIPAddress>/servl

et?p=network-adv&q=load

Phone User Interface

Configure VPN feature.

Yealink CP860 [272/417] Procedure

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