What about dedicated machines behind NAT? A premise customer with an SSL VPN router/firewall loses functionality when 3CX takes ports 80 and 443 in the NAT.@sotrix
When you install the System, you have an XML file and in there, you can specify the local port of the system.
If you want to go with this option, feel free to do so, however, keep in mind that 3CX system should be dedicated as per our manual (no support can be provided in case something is wrong).
Founded in 2005, when VoIP was an emerging technology, 3CX has gone on to establish itself as a global leader in business communications.