Specify FQDN for Google Android Push

[JCC_Admin]

Hi,

I am setting up a tight Outbound rules for 3CX server, as shown in the Firewall & Router Configuration documentation all services that requires outbound connections have specific IPs/FQDN to be limited instead of opening entire port like 443 to all IPs except for Google Android Push which requires port 443 (except Video Conferencing which we do not use).
What is the IP rage or FQDN that should be specified for Android Push?

 

[TheodorosG_3CX]

I would suggest that you check the below complete troubleshooting guideline as the PBX will contact the Google FCM:
• https://www.3cx.com/docs/android-push-troubleshooting/