Starting with firmware version 8.4.27, all Snom firmware versions for Snom 370, 8xx and 7×0 include the ability to build secure VoIP-Infrastructures via OpenVPN-Technology: in this post I will show step-by-step how to configure a Snom 720 to connect to an Asterisk pbx installed on CentOs 5.2 (for the others Snom phone supporting OpnVpn the procedure is the same).

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