I need to know the correct way to use any kind of voip client installed on iphone or android, without exposing asterisk to security risk.
By now, asterisk is behind a NAT, in the same LAN as my Voip phones and it works correctly.
I installed 3cx client on my iphone and configured itself as asterisk extension. Obviously it works only when the Iphone is connected to the corporate WLAN and it stops to work on the internet side.
what I have to do? Have I to NAT the 5060?