Hi everyone,
We're troubleshooting an issue on a corporate network protected by Cisco Umbrella.
A browser-based time calculation tool works normally on unmanaged networks, but when users access it from our office environment, some JavaScript functions stop responding after the page loads. The page itself is accessible, but updating the time fields no longer recalculates the results until the page is refreshed.
One example is this work hours calculator: https://mauricettecalcul.fr/
There are no JavaScript errors in the browser console, and the issue occurs in both Chrome and Edge only when traffic passes through our corporate network.
At the moment, we're trying to determine whether SSL inspection, DNS filtering, or another Umbrella policy could be interfering with the site's scripts without completely blocking access.
Has anyone experienced similar behavior with Cisco Umbrella or Secure Access? If so, what logs or policies would you check first to identify the root cause?
Thanks in advance for your advice.
