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  1. Authentication failed when connecting to 3CX phone system

    I installed 3CX Phone System 11.0 on Windows Server 2012. The server is a dedicated server with 1 public IP. I opened some required ports on firewall and got pass for all firewall check: 5060 (TCP and UDP), 5080 (TCP and UDP), 5090 (TCP and UDP), 9000-9049 (UDP). I configured 3CX Tunnel...
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