3CX Quick Start Guide - Enable Two-factor Authentication on Users

This video demonstrates how to implement two-factor authentication on a user or users in the 3CX Admin Console.
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[@madsongz78]

3cx sbc must use internet static ip, right?

[@voxtelesys]

Greetings, and thanks for the comment!
You will need to assign the device/machine running the 3CX SBC a Private (RFC1918) Static IP. This machine must be running all the time otherwise the phones connected to it will no longer function, at least until the machine starts up again.