Kerio Control Web Filter Is Not Activated Categorization Is Disabled Fixed !free! Jun 2026

Verify that outbound traffic to Kerio/GFI update servers isn't being intercepted by an upstream proxy or an ISP-level content filter. 5. Restart the Kerio Control Engine

💡 If the filter is active but specific sites are still failing, try enabling HTTPS Decryption in the Content Filter settings; otherwise, the filter cannot see the full URL to categorize it.

The Kerio Control appliance must be able to resolve the addresses of the backend categorization servers. If the firewall itself cannot resolve DNS, the Web Filter will fail to activate.

The most effective way to force the filter back into an "Activated" state is through the SSH console. This prevents the system from automatically disabling the filter when it encounters a brief connection hiccup. Verify that outbound traffic to Kerio/GFI update servers

After applying the fixes, you must ensure the filter itself is enabled in the settings.

For HTTPS sites, Kerio Control must to categorize URLs. Without SSL inspection, only SNI-based partial categorization works.

Here is a structured troubleshooting guide to pinpoint and solve the problem. The Kerio Control appliance must be able to

To understand the gravity of the failure, one must first understand the architecture of Kerio Control’s filtering mechanism. The system does not function as a monolithic block; rather, it relies on a symbiotic relationship between two distinct elements:

If you suspect a corrupted database, rebuild it to resolve categorization issues.

Look for red text or an exclamation mark next to Categorization status . This prevents the system from automatically disabling the

"Kerio Control Web Filter is not activated. Categorization is disabled."

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After restart, wait 2–3 minutes and refresh the Web Filter page.

Kerio Control must be allowed to communicate outbound on specific ports to contact the categorization cloud networks.

Check if any upstream ISP routers or parental control devices are blocking these outbound requests. Step 4: Synchronize System Time (NTP)