Occasionally corporate networks (firewalls) or virtual private networks (VPNs) may block all video and/or audio services from operating in browsers. This can result in audio or video not working, or an inability to access the twine service.

Checklist to triage connection issues for participants:

  1. If participants are on a VPN have them disable it

  2. Have participants connect using their own private network versus a corporate network

  3. Update your IT Department's allow list with twine domains and IPs to ensure corporate networks do not block the service

Adding Domains and IPs to an allow list

The following domains are used to provide the web service. Please have your IT department update the allow list with the following domains:

Core Product

  • *.twine.nyc

  • appweb.twine.nyc

  • {custom_domain}.twine.nyc ➡️ In the event you are leveraging a custom subdomain please ensure it is added to the allow list

  • https://auth.workos.com/* ➡️. In the event you are leveraging Single Sign-On (SSO)


We leverage an audio/video infrastructure service called Twilio. Twilio has a list of IP addresses and protocols to be updated in your allow list by your IT department.

Twilio IP Ranges: https://www.twilio.com/docs/video/ip-addresses

We also leverage Cloudflare for hosting purposes. The list of IP addresses can be found here: https://www.cloudflare.com/ips/

Share this article with your IT department and they should be able to take care of updating the allow list.

If you have other questions feel free to reach out!

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