I have FeePBX version 184.108.40.206 running as a vm with one commercial module – EndPoint manager. All works except I’m having trouble provisioning Yealink IP phone on site 2, site 1 is where PBX server is. I must mention that softphone works ok over vpn and I can provision extension with free version of Zoiper app.
During IP phone provision, the phone gets correct extension and gets assigned with correct admin password set by me in PBX but finial step fails all the time
We use SonicWall firewalls on both sites, I added option 66 to DHCP.
The phone I’m having trouble with is Yealing T42S, I also attached the diagram for better understanding.
It’s very possible I oversight something in the PBX firewall or edge firewalls but can’t figure out what.