Unable to establish secure connection to Zoom error - How to fix

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Unable to establish secure connection to Zoom error - How to fix
Credit: Zoom

If you are getting the "Unable to establish a secure connection to Zoom" error message while trying to connect to a Zoom meeting, we can help!

Zoom is an incredibly popular and powerful video conferencing tool, used by millions of people around the world for everything from remote work and education to personal and social interactions.

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Despite its many benefits, however, Zoom is not without its flaws. Install error code 10004, error code 3160, and of course, the dreaded "Unable to establish secure connection to Zoom" error have been plaguing Zoom users for years.

In this article, we will explore some common solutions to help you fix this connection error and successfully join your Zoom call.

How to fix "Unable to establish secure connection to Zoom" error

The "Unable to establish secure connection to Zoom" error can be frustrating to deal with, especially if you are trying to join an important meeting or class. Luckily, we have found some proven solutions to this problem on online forums.

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Here are some suggestions to fix the "Unable to establish secure connection to Zoom" error:

  • Click on View Certificates and see if you/your organization is using pfSense/pfBlocker. If so, go to Firewall > pfBlockerNG > DNSBL and scroll down to the bottom to the Custom Domain Whitelist, and then, whitelist ".zoom.us". Afterwards, force a rule update by going to Update > Select 'Force' Option - Reload and run it.
  • Under the profile setting in Zoom, look for calendar and contacts Integration. Delete the existing integration settings and create a new one.

Hopefully, one of our suggestions will fix the issue for you. If not, you can use the web client to join Zoom meetings. Also, it is worth reaching out to the Zoom support team to see if they can provide any further assistance.

Read more: Is Zoom private and secure - Does Zoom use end-to-end encryption?

What is "Unable to establish secure connection to Zoom" error?

The "Unable to establish secure connection to Zoom" error typically occurs when firewall/router solutions such as pfBlockerNG blocks you from connecting to a Zoom server that is not listed in the list of trusted servers.

So, to fix the "Unable to establish secure connection to Zoom" error, just check the logs to see if any Zoom servers are blocked by the firewall. If so, just whitelist those servers and you will be able to connect to Zoom again.

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Happy Zooming!