{"id":30225,"date":"2025-07-02T09:59:17","date_gmt":"2025-07-02T14:59:17","guid":{"rendered":"https:\/\/kaceli.com\/a\/?p=30225"},"modified":"2025-07-02T10:03:38","modified_gmt":"2025-07-02T15:03:38","slug":"fixing-zoom-untrusted-server-certificate-issue-with-untangle-arista-firewall","status":"publish","type":"post","link":"https:\/\/kaceli.com\/a\/fixing-zoom-untrusted-server-certificate-issue-with-untangle-arista-firewall\/","title":{"rendered":"Fixing Zoom Untrusted Server Certificate Issue with Untangle Arista Firewall"},"content":{"rendered":"

\"image<\/a>Introduction<\/h2>\n

When using Zoom behind an Untangle Arista firewall, you might encounter an “untrusted server certificate” error when attempting to launch the Zoom application. This issue typically arises due to the firewall’s security settings intercepting and inspecting SSL traffic, which can cause Zoom to flag the connection as untrusted. Fortunately, there\u2019s a straightforward solution to resolve this problem by configuring an exception in the Untangle Arista firewall.<\/p>\n

The Problem<\/h2>\n

The Untangle Arista firewall\u2019s Threat Prevention Module may intercept Zoom\u2019s SSL connections, causing the Zoom client to display an “untrusted server certificate” error. This prevents users from joining or hosting Zoom meetings, disrupting workflows and communication.<\/p>\n

The Solution<\/h2>\n

To fix this issue, you need to add an exception for Zoom\u2019s domains in the Untangle Arista firewall\u2019s Threat Prevention Module. Follow these steps:<\/p>\n

    \n
  1. \n

    Log in to the Untangle Arista Admin Interface<\/strong>:<\/p>\n

      \n
    • \n

      Access the firewall\u2019s web-based administration panel using your admin credentials.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n

    • \n

      Navigate to the Threat Prevention Module<\/strong>:<\/p>\n

        \n
      • \n

        From the main dashboard, go to the Apps<\/strong> section and select the Threat Prevention<\/strong> module (sometimes referred to as Web Filter or SSL Inspector, depending on the firmware version).<\/p>\n<\/li>\n<\/ul>\n<\/li>\n

      • \n

        Add an Exception for Zoom<\/strong>:<\/p>\n

          \n
        • \n

          Locate the Pass Sites<\/b> tab.<\/p>\n<\/li>\n

        • \n

          Click Add Rule<\/strong> or Create Exception<\/strong>.<\/p>\n<\/li>\n

        • \n

          In the Domain<\/strong> or Hostname<\/strong> field, enter *.zoom.us<\/span> to cover all subdomains used by Zoom.<\/p>\n<\/li>\n

        • Save the changes.<\/li>\n<\/ul>\n<\/li>\n
        • \n

          Apply the Configuration<\/strong>:<\/p>\n

            \n
          • \n

            Click Apply<\/strong> or Save<\/strong> to update the firewall\u2019s settings.<\/p>\n<\/li>\n

          • \n

            The firewall may take a moment to apply the new configuration.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n

          • \n

            Test Zoom<\/strong>:<\/p>\n

              \n
            • \n

              Launch the Zoom client or refresh the Zoom web interface.<\/p>\n<\/li>\n

            • \n

              Verify that the “untrusted server certificate” error no longer appears and that you can connect to meetings without issues.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n

              Why This Works<\/h2>\n

              The *.zoom.us<\/span> exception instructs the Untangle Arista firewall to bypass SSL inspection for Zoom\u2019s domains. This prevents the firewall from intercepting and re-signing Zoom\u2019s SSL certificates, allowing the Zoom client to trust the connection and function correctly.<\/p>\n

              Additional Notes<\/h2>\n
                \n
              • Other Firewalls<\/strong>: If you\u2019re using a different firewall appliance, the process may vary, but the principle of adding an SSL inspection bypass for *.zoom.us<\/span> typically applies.<\/li>\n
              • \n

                Security Considerations<\/strong>: Bypassing SSL inspection for Zoom\u2019s domains is generally safe, as Zoom uses secure, encrypted connections. However, always review your organization\u2019s security policies before making changes.<\/p>\n<\/li>\n<\/ul>\n

                Conclusion<\/h2>\n

                By adding a *.zoom.us<\/span> exception in the Untangle Arista firewall\u2019s Threat Prevention Module, you can quickly resolve the “untrusted server certificate” issue and restore seamless Zoom functionality. This simple fix ensures your team can continue collaborating without interruption.<\/p>\n","protected":false},"excerpt":{"rendered":"

                Introduction When using Zoom behind an Untangle Arista firewall, you might encounter an “untrusted server certificate” error when attempting to launch the Zoom application. This issue typically arises due to the firewall’s security settings intercepting and inspecting SSL traffic, which can cause Zoom to flag the connection as untrusted. Fortunately, there\u2019s a straightforward solution to […]<\/p>\n","protected":false},"author":1,"featured_media":30226,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_eb_attr":"","footnotes":""},"categories":[6,7],"tags":[448,450,449,447,451,452],"class_list":["post-30225","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-malesuada","category-health","tag-firewall","tag-ssl-inspection","tag-untangle-arista","tag-zoom","tag-zoom-error","tag-zoom-fix"],"_links":{"self":[{"href":"https:\/\/kaceli.com\/a\/wp-json\/wp\/v2\/posts\/30225","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kaceli.com\/a\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kaceli.com\/a\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kaceli.com\/a\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kaceli.com\/a\/wp-json\/wp\/v2\/comments?post=30225"}],"version-history":[{"count":0,"href":"https:\/\/kaceli.com\/a\/wp-json\/wp\/v2\/posts\/30225\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/kaceli.com\/a\/wp-json\/wp\/v2\/media\/30226"}],"wp:attachment":[{"href":"https:\/\/kaceli.com\/a\/wp-json\/wp\/v2\/media?parent=30225"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kaceli.com\/a\/wp-json\/wp\/v2\/categories?post=30225"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kaceli.com\/a\/wp-json\/wp\/v2\/tags?post=30225"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}