Which ports must I open to access Hosted by 3CX instances?

Question:
We have a very strict corporate firewall setup on the internet. Which ports must I allow (outbound traffic)  to access all services for instances hosted by 3CX?

Answer:
To access your instance hosted by us, you must allow traffic to the given IPv4 and IPv6 addresses of your instance. You can find them in your Management Console >> Dashboard >> Information.
Then allow outbound traffic to the following ports:
  • TCP 443 (default) or 5001 if present in the restored backup
  • TCP & UPD 5060
  • TCP & UDP 5090
  • TCP 5061
  • TCP 5062
  • UDP 9000-10999