SOLVED: If you want to connect to 3CX remotely using the 3CX Apps, you only need to port forward/NAT port 5090 (TCP/UDP) on the firewall in front of the 3CX PBX
EdgerouterX - Outgoing Traffic VLAN Firewall 3CX | Ubiquiti Community
3CX Online Advanced Training: NAT and Port Forwarding - YouTube
3CX port forwarding in Fortigate (with Static NAT 1:1) - YouTube
Ports Used by 3CX – Aatrox Communications
Guide on How to Configure pfSense for 3CX Phone System
Sip PBX 3CX Ack - Discussions - Sophos Firewall - Sophos Community
3CX Firewall Checker Client Application Helps Troubleshoot Remote Extensions – Ank Technologies Pvt Ltd – IP PBX | IP Phones | Video IP Phones | Wireless IP Phones | IP Audio System
3CX Firewall Check failed on Sophos XG210 - Discussions - Sophos Firewall - Sophos Community
Sophos XG configuration for 3CX - General Internet Connectivity & Telecom
Guide on How to Configure pfSense for 3CX Phone System
3CX Port Forwarding Issue - Discussions - Sophos Firewall - Sophos Community
3CX Phone System – Installation - vInfrastructure Blog
Create a Maintainable Phone System in the Cloud with SBC – Aatrox Communications
3cx Firewall Problem | Ubiquiti Community
3CX port forwarding in Fortigate (static NAT 1:1) | HOTKEY404
Calaméo - Call Center Ingles Convertido
Solved - ports to be opened on firewall | 3CX Forums
3CX Best Practices | Voxtelesys
Which IP´s and ports are JEDWare using? – JEDWare Help Center
3CX port forwarding in Fortigate (static NAT 1:1) | HOTKEY404
Sophos XG configuration for 3CX - General Internet Connectivity & Telecom
