Hi guys. I've followed the guide for installing the Debian version 15 on OVH. All good, phones register, firewall test OK. But... I cannot get the Trunk to register, tried different trunks, also from the templates. I have tested the trunk and it's working directly from a Yealink T48G and even from another 3CX install I have locally. Error message is: SIP Server/Call Manager ID: 12293 Registration at XXXX has failed. Destination (sip:XXXX@XXXX:5060) is not reachable, DNS error resolving FQDN, or service is not available. Anyone having experienced the same issue on OVH? All is basic setup as per the guidelines/manuals from 3CX.