bardissi said:That is correct each cloud provider has a different firewall mechanism to do port forwarding.
On another note since all of your phones would be remote to this server are you planning on using the 3cx proxy?
There is another option.
We offer a hosted Session Border Controller that allows as many remote phones as you want to connect to your 3cx server without the tunnel or stun. It solves the sip traversal problem and you wont have an issue with multiple phones behind the same public ip at any remote site.
Let me know if you are interested in testing it out!
George
[email protected]
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