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Starting with firmware version 8.4.27, all snom firmware versions for all snom phones with the exception of the D120 & D305 include the ability to build secure VoIP-Infrastructures via OpenVPN-Technology.
Snom decided to use OpenVPN because it is compatible with SSL/TLS, RSA Certificates and X509 PKI, NAT, DHCP and TUN/TAP virtual devices.
To be able to use the VPN client on your Snom phone, download the patch here from the Firmware Update Center.
This means that almost every current Snom phone could have a built-in VPN client.Â
Further information about the configuration can be found here: Configuring VPN on Snom Deskphones
Of course, they also need a VPN server.
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