_ExcerptWebRTCFirewallConfig

To make our WebRTC solution more resilient, we use two WebRTC providers. You must add IP addresses for both providers:

• Vonage WebRTC provider

  When using WebRTC, you must use IPv4 over IPv6 in prefix policies.

  Purpose	Protocol	Source IP	Source port	Destination port	Destination IP
  Signalling/presence	TCP	Your local network addresses	*Ephemeral range	443	See Destination IP addresses.
  Media	UDP

  *Ephemeral Range: The application will select any available port from a range depending on the operating system. On most machines, the port range is 1,024 to 65,535.

  
  

  Destination IP addresses
  Your firewall settings should allow outbound traffic as specified in the following list:
  
• Backup WebRTC provider
  Add all the IP addresses listed in the following pages to your allowlist:
  • https://www.twilio.com/docs/stun-turn/regions
  • https://www.twilio.com/docs/voice/client/javascript/voice-client-js-and-mobile-sdks-network-connectivity-requirements

If your agents use VPN clients, you must also add *.nexmo.com to your allowlist; failure to do so may result in agents not being able to use WebRTC.

Where relevant, you must also add *.nexmo.com to the VPN's proxy bypass list and then restart your agents' clients.