3CX is hosted on Google cloud with other 15+ instances that work perfect! This is Debian installation. Instance is working for more than 1 week.hi johnvam
Is this a Debian PBX that has just been added to your instance manager or was it already working?
Have you checked the network at the PBX end that it still allows the traffic to pass for those ports?
Instance Public IP is Static! Also FQDN matches the Public IP of the instance!Ok then, can you check the instance is indeed still online and working (no stopped services or anything) and also ensure that the FQDN of the PBX matches its IP address that it holds currently in the Google Compute Engine panel?
I have done it many times... also tried to reboot the server many times...Could be a number of things at play here, for a quick test you can disable instance manager on the host machine and press ok to save, then enable it again and allow it to reconnect.
Which ports are used for instance manager for ingress and egress?Please check the VM firewall options in this case, I believe on the Google firewall the Egress will be 'allow all' if you haven't made any changes.
View attachment 11472
Can you also let me know what version that specific PBX is running?
Founded in 2005, when VoIP was an emerging technology, 3CX has gone on to establish itself as a global leader in business communications.