UserZoom on restricted networks

Understand the settings for UserZoom to work when you are behind a firewall/proxy or on other restricted networks.

This article applies to: uz logo tiny.png UserZoom

Plan Availability: All Plans
👥 User roles: Owner, Admins, Researchers, and Collaborators
For more information, see our article on how to find your plan and user role.


On this page:



Unmoderated studies on restricted networks

Your IT department may have restrictions set up on your network or computer. To get around these restrictions, and use an internal page for a study, follow these steps:

  1. Whitelist *
    For firewalls or proxies that don’t support wildcards, this is the list of domains to whitelist.
  2. If your study requires access to the UserZoom extension, whitelist the Chrome Web Store.
  3. If you need more help, we’re here for you.



Moderated studies on restricted networks

Your IT department may have restrictions set up on your network or computer. To make sure your router, firewall, or networking device is not blocking access, follow these steps:

  1. Whitelist the following domains:
    • *
    • *
  2. Open the following ports:
    • TCP port 443 (required)
    • UDP port 3478 (required to allow UDP traffic for video and audio data) 
    • Any range up to 2K UDP ports within the 1025 - 65535 range
      While Moderated might work without opening any UDP ports, we have seen that not allowing UDP traffic can result in intermittent audio and video issues during a session. If you would need a list of specific IPs for which to allow UDP traffic, please reach out to us.
  3. Make sure WebRTC traffic is not blocked.
    • WebRTC traffic can be blocked even if you have the above ports open.
    • To update WebRTC information, check the settings of your browser.
    • For assistance with updating this information, refer to your browser's Help section.
  4. In addition to HTTP, WSS (WebSocket) protocol needs to be supported within the corporate network as it is required for real-time communication and state synchronization between participants.

If you need more help, we’re here for you.


Participant WebRTC issues

  • Participants may see this issue when joining via VPN.
  • Ask them to disconnect from their VPN and connect again.



UserZoom extension

  • To enable downloads of the UserZoom extension at your company, you might need your security team or browser admin to whitelist access to it from the Google or Mozilla Web Stores.
  • Whitelisting the UserZoom extension ensures a smooth installation process and helps keep your browsing experience secure.
  • Follow the steps below based on your browser.



  • Between April 29, 2024, and June 1, 2024, we are rolling out an update to our Chrome browser extension to enhance security and performance.
  • Due to this upcoming update, your organization may need to review, and possibly renew, the whitelisting to ensure the existing and new extensions continue operating smoothly.

To whitelist the UserZoom extension in Chrome, follow these steps:

  1. Go to your Google Admin console (
  2. Navigate to Devices Chrome management.
  3. Click Apps & extensions.
  4. Choose From the Chrome Web Store.
  5. Enter the UserZoom extension ID:
    • Before April 29: 2024: jhgccgnbbhnlhgkhkdpmciognioebcoa
    • After April 29, 2024: lpkhnilfhgbkijcldgcabigenfmhkebg
  6. Click Save.




Coming soon!



Please provide any feedback you have on this article. Your feedback will be used to improve the article and should take no more than 5 minutes to complete. Article evaluations will remain completely confidential unless you request a follow-up. 

Was this article helpful?
1 out of 1 found this helpful