How to configure corporate firewall
Ensure that your corporate firewall has the following ports and IP addresses in its whitelist.
Web and mobile SDK traffic
8000-18000 UDP, 20000-30000 UDP, 443 TCP, 12093 TCP ports for Web gateways and media servers
443 port for load balancer. The balancer's IP addresses:
35.204.101.31
82.202.208.155
84.201.130.55
84.201.128.92
31.184.223.90
69.167.178.93
SIP traffic
5060 TCP/UDP or 5061 SIP/TLS port for Session border controller
8000-18000 UDP for media servers