Operation Manual

542 COMfortel 1400IP/2600IP/3600IP - Firmware V2.2G - Operation and Configuration V03 07/2015

Settings

Network

VPN

A VPN (Virtual Private Network) is a private, closed network within an open network, such as

the Internet. Data packets are encrypted, and VPN subscribers can be required to authenticate

themselves, to ensure that the data packets are transferred between subscribers without being

vulnerable to eavesdropping or manipulation.

The telephone uses OpenVPN libraries to establish a VPN over a TLS/SSL-encrypted

connection.

However, you must make the following settings before you can use the telephone to set up a

VPN:

• configure the VPN network interface type (Settings > Providers & PBXs)

• OpenVPN configuration file, saving in the telephone

• OpenVPN certificate, saving in the telephone

• OpenVPN, enabling

Important: When you restart the telephone, its time is reset unless it is

updated automatically by a time server (NTP server). As data packets are

given a time stamp when they are encrypted, it is important that the current

time is set on the telephone ( Apps > Settings > System > Date

& Time). A connection cannot be established via a VPN if a data packet time

stamp is different from the time on the telephone.

Saving the OpenVPN Configuration File in the Telephone

The OpenVPN configuration file contains all the settings needed to establish a VPN

connection, such as the encryption type and references to the required certificates.

You can save this configuration file as follows:

• Using the configuration manager

Requirements:

– an OpenVPN configuration file (openvpn.cfg) saved on the hard disk

1. Open the Settings > Network > VPN screen.

2. Under Config file, click Search.

A file selection dialogue opens.