Hello,
I'm looking for a recommended method to facilitate mobile users who have asked for SIP Clients on their smartphones. We use IP tables for allowing access to our server so putting an app on the device to register the IP is not a problem. But, I'm hesitant because I worry about SIP credentials sending in the clear. I'm not sure if TLS with Asterisk, or using a vpn to the server would be best. Can anyone refer a good working solution?
Thank you,