Kerio Control Web Filter Is Not Activated Categorization Is Disabled Fixed Info

Avoid using Google DNS (8.8.8.8) for Zvelo queries, as it can cause "Invalid Authorization" errors.

If you are seeing the error in your Kerio Control administration interface, your network's content filtering has essentially been paralyzed. This error prevents the firewall from identifying website categories (like social media, gambling, or malware sites), meaning your custom URL rules won’t work.

Ensure your upstream ISP modem or router isn't blocking traffic. Kerio Control requires open outbound access for:

If Kerio Control is behind another upstream firewall, create an explicit allow rule to those destinations. Avoid using Google DNS (8

Run:

After completing the steps:

He swapped the internal DNS for Google’s 8.8.8.8 to ensure the appliance wasn't lost in translation. Still, the status remained "Not Activated." The Breakthrough Ensure your upstream ISP modem or router isn't

There are several reasons why the Kerio Control web filter may not be activated, and categorization is disabled. Some of the common causes include:

By following these steps, you should see the status change to and your categorization rules will resume functioning immediately.

Seeing the error message means your network is currently exposed to malicious websites and unauthorized content. When this error occurs, Kerio Control stops communicating with its cloud-based categorization servers, effectively disabling your URL filtering policies. Still, the status remained "Not Activated

After deletion, Kerio will redownload a fresh copy on the next update cycle (usually within 5 minutes).

Restart categorization/update service