To allow users to use their 3CX apps remotely, on Android, iOS or Windows, you need to ensure that these ports are open: 1. Port 5090 (inbound, UDP and TCP) for the 3CX tunnel. 2. Port 443 or 5001 (inbound, TCP) HTTPSfor Presence and Provisioning, or thecustom HTTPS port you specified. 3. Port 443 (outbound, TCP) for Google Android Push. 4. Port 44...

To create and participate in web-based meetings, the 3CX-hosted cloud service must be able to communicate with the 3CX PBX and vice versa. To do so, these ports need to be configured: 1. Port 443 (inbound, TCP) must be allowed for participants to connect your 3CX System 2. 3CX System: Port 443 (outbound, TCP) must be allowed to connect to 3CX’s clo...

A 3CX System connects to various services provided by 3CX in the cloud. 1. SMTP Service: Cloud Service for SMTP Messages smtp-proxy.3cx.net, 2528 (outbound, TCP) 2. Activation Service: Activation of 3CX Products activate.3cx.com,443 (outbound, TCP, uninspected traffic) 3. RPS Service: Provisioning of Remote IP Phones rps.3cx.com, 443 (outbound, TCP...