If you are unsure of how to make these changes, please contact your IT department.
Bandwidth Requirements
Video sharing should adapt to the available bandwidth but we recommend a bandwidth of 5Mbps.
Endpoints to Whitelist
Please allow access outbound to all of the following hostnames/IP addresses, and ensure inbound traffic is allowed in response to the outbound connections.TCP 443 (ensure HTTPS inspection is bypassed for these hostnames):
- global.vss.twilio.com
- sdkgw.us1.twilio.com
TCP 443 + UDP 3478 + UDP 10,000 - 60,000:
(column 1)
- 13.210.2.128 - 13.210.2.159
- 54.252.254.64 - 54.252.254.127
- 3.25.42.128 - 3.25.42.255
- 18.231.105.32 - 18.231.105.63
- 177.71.206.192 - 177.71.206.255
- 18.230.125.0 - 18.230.125.127
- 52.59.186.0 - 52.59.186.31
- 18.195.48.224 - 18.195.48.255
- 18.156.18.128 - 18.156.18.255
- 52.215.253.0 - 52.215.253.63
- 54.171.127.192 - 54.171.127.255
- 52.215.127.0 - 52.215.127.255
- 3.249.63.128 - 3.249.63.255
- 52.66.193.96 - 52.66.193.127
- 52.66.194.0 - 52.66.194.63
(column 2)
- 3.7.35.128 - 3.7.35.255
- 13.115.244.0 - 13.115.244.31
- 54.65.63.192 - 54.65.63.255
- 18.180.220.128 - 18.180.220.255
- 13.229.255.0 - 13.229.255.31
- 54.169.127.128 - 54.169.127.191
- 18.141.157.128 - 18.141.157.255
- 34.203.254.0 - 34.203.254.255
- 54.172.60.0 - 54.172.61.255
- 34.203.250.0 - 34.203.251.255
- 3.235.111.128 - 3.235.111.255
- 34.216.110.128 - 34.216.110.159
- 54.244.51.0 - 54.244.51.255
- 44.234.69.0 - 44.234.69.127
Running a Test
Please access the following website to run a test, and allow access to your microphone/camera: https://networktest.twilio.com/
At least one (or more) of the following must pass:
- NTS: TURN UDP Connectivity - this is recommended for optimal quality
- NTS: TURN TCP Connectivity
- NTS: TURN TLS Connectivity
This test must pass:
- Video: Test Group Room with TURN
If any of the above tests fail, please verify the above endpoints have been whitelisted and there is no HTTPS inspection enabled on the two hostnames before attempting the test again.
If you find the test stalls on "Voice" and never proceeds to the rest, temporarily whitelist *.twilio.com, ensure HTTPS inspection is off for *.twilio.com, and then retry the test.
If you then see a successful test result as per the above required passing tests, you can safely remove the whitelist and HTTPS inspection bypass for *.twilio.com, assuming the two specific hostnames have been whitelisted and are bypassed for HTTPS inspection.
Points of Note
- As media traffic flows over UDP, we STRONGLY RECOMMEND that you ensure any policies which would drop UDP packets, such as UDP flood prevention, are turned off
- Any network device which drops UDP packets would cause the video and/or audio to stutter.
support.meettheteacher.com. (n.d.). Video: Network Requirements for Firewalls and Web-Filters - Meet the Teacher. [online] Available at: https://support.meettheteacher.com/article/829-virtual-conferences-network-requirements-for-firewalls-and-web-filters .