Firewall 

  • Clients (Browser and App) should allow outgoing UDP connections to the public internet and allow return traffic in response. Since our service provider uses dynamic IP addresses, it is not possible to specify a range of IP addresses requests go to.
  • Clients (Browser and App) must also allow incoming connections from chunderm.gll.twilio.com and matrix.twilio.com. Also, they must be allowed to make outgoing connections from any port in the ephemeral range (1024-65535).

 

The following ports / port ranges must be opened in order to ensure the continued usage of voice services:

 

Phone on the browser

 

ComponentAddressClient-side port usedServer-side port usedProtocol
Signaling

chunderw-gll.twilio.com

chunderw-vpc-gll.twilio.com

au1: chunderw-vpc-gll-au1.twilio.com
br1: chunderw-vpc-gll-br1.twilio.com
ie1: chunderw-vpc-gll-ie1.twilio.com
jp1: chunderw-vpc-gll-jp1.twilio.com
sg1: chunderw-vpc-gll-sg1.twilio.com
us1: chunderw-vpc-gll-us1.twilio.com


Any443TCP
Presencematrix.twilio.com
Any443TCP
RTPAny static IP pulled from the ranges mentionedAny10,000-20,000UDP
 Insights eventgw.twilio.com Any 443 TCP

 

Phone on the mobile app

 

ComponentAddressClient-side port usedServer-side port usedProtocol
Signalingchunderm.gll.twilio.com
Any10194TCP
Presencematrix.twilio.com
Any443TCP
RTPAny static IP pulled from the ranges mentionedAny10,000-20,000UDP

 

 Testing firewall and port configuration

For more details, refer to our service provider’s list of network connectivity requirements.

 

 

Read more: Browser requirements | Network requirements