I have been able to successfull setup a freePBX distro on a Vultr server via the ISO install. i have everything working except i am unable to recive incoming audio which what i think is a nat issue of some type.
I started our by opening in the Vultr Firewall
UDP 10000-20000
UDP 5161
UDP 5060
but i have tried enable Nat, disable Nat
then i just open
UDP 0-65535
and then do this with the idea that the Freepbx boxes firewall would handle, But i get nothing for incoming audio.
You are needlessly using the vultr firewall, you don’t need Nat, the machine has a public IP , look to any firewalls/routers between your extensions and the vultr ip