As the title says, I am having issues getting our Yealink T42G and T46S phones to provision via STUN.
Specs:
Windows 10
3CX 16.0.622
T42G Firmware 29.83.0.130 Stock Template
Firewall Sophos UTM SG
Valid HTTPS cert on 3CX Web Services
We have all of the required firewall ports open and DNAT...