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

Are you seeing any specific in the Kerio Control Error Log when you try to enable the filter?

: Kerio Control sends automatic DNS queries to update servers. If it fails to receive a response 10 times within 1 minute, it marks the Web Filter as "unreliable" and disables categorization. Invalid Authorization : This often stems from an expired

Click the button. This refreshes the relationship with the GFI services. 3. Check DNS Settings (Crucial) Kerio Control requires accurate DNS to reach ://kerio.com . Go to Configuration > Interfaces . Are you seeing any specific in the Kerio

Locate the checkbox labeled and ensure it is checked. Click Edit or look at your forwarding list. Add reliable, highly redundant public servers to the list: Google DNS: 8.8.8.8 and 8.8.4.4 Cloudflare DNS: 1.1.1.1 and 1.0.0.1 Click Apply to execute the configuration change.

Try disabling and re-enabling the Web Filter to resolve activation issues. Invalid Authorization : This often stems from an

He pinged the Kerio update servers. The packets returned instantly.

Users report that web filtering is not functioning as expected in Kerio Control. When checking the settings, the status shows “Not Activated” and “Categorization is Disabled.” As a result, URL filtering, content rules, and category-based policies are not enforced. Check DNS Settings (Crucial) Kerio Control requires accurate

Ensure your firewall allows outgoing traffic on (HTTPS) and Port 80 (HTTP) to Kerio's update servers.

No categorization data appears in traffic logs.

When managing an enterprise network with , encountering the error "Kerio Control Web Filter is not activated, categorization is disabled" can severely expose your local network. This critical warning signifies that Kerio's cloud-based third-party content database (Zvelo) has stopped communicating with your firewall.