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You may also wish to visit the A-Series IP Phones for Asterisk Overview for additional information and links to related articles.
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In other to enable VPN service, you need to have a OpenVPN server and Client OpenVPN configuration file (client.ovpn), a Root (CA) certificate (ca.crt) ,client KEY (client.key), and client CRT (client.crt) files.
Files: client.ovpn , ca.crt , client.key and client.crt will be uploaded to the phone.
If you are using setting up the phones via configuration files, please note that the files that should be uploaded to the phone must be available outside of the VPN
Digium A-Phone supports HTTP authentication basic and digest as well as connecting without authentication.
Configuration files that are downloaded by the phone will be stored in the phone and will be used for subsequent reboots.
OpenVPN server configuration must not require manual password entry in order to connect. The phone does not provide the user a means of inputting user and/or password credentials as a part of VPN connection.
Only Certificates within CRT format are supported.
Web interface configuration
Log into the web interface by surfing to the IP of the phone on your network. The default username is admin, and the default password is 789.
Click on Network and then click on the VPN tab.
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Apply Changes and exit the GUI.
Using configuration files
Phone configuration file example:
A2x VPN Configuration Example
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ca.crt
client.crt
client.key
client.ovpn
Creating OpenVPN configuration files
OpenVPN is very extensive in terms of the configuration options and therefore is almost impossible for us to test each possible scenario as how you should setup this file is depended on your OpenVPN Server configuration. If you need assistance adding additional parameter please contact your IT Network team as they should provide more information about what parameters are needed in your VPN implementation. if you are implementing a new OpenVPN, you can use the example below, we have confirmed that the following configuration works with Digium A-Phones
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Testing the Configuration
When the Enable VPN Tunnel element is enabled on the phone, the phone will display a lock in the status bar, e.g.:
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