Kerio Control Web Filter Is Not Activated Categorization Is Disabled Fixed 'link' Instant

If the UI is unresponsive or the filter refuses to activate despite a valid license, a service restart via SSH or the local console often resolves the "stuck" state.

Ensure you are running the latest version of Kerio Control. Check for updates and install the latest version if necessary.

Don’t let a disabled web filter leave your network exposed. Use this guide to diagnose, repair, and prevent the problem from returning.

If Kerio Control detects multiple DNS timeouts (10 failures within 1 minute), it may automatically disable the Web Filter as "unreliable". You can manually disable this safety check via SSH: Log in to the console. Navigate to /opt/kerio/winroute ./tinydbclient "update SiteFilter set DetectReliability=0" Restart the service using /etc/boxinit.d/60winroute restart 3. Verify License and Module Activation If the UI is unresponsive or the filter

You must restart Kerio Control after changing these DNS settings to clear the cached status. 2. Disable "Reliability Detection" (SSH)

Do you see any specific errors in the or Warning Log modules?

Kerio sends automated check queries to cloud infrastructure. If a response is dropped 10 consecutive times within 1 minute, the firewall marks the backend engine as unreliable and completely disables categorization. Don’t let a disabled web filter leave your network exposed

: Create a rule allowing traffic from the Firewall itself to: prod-update.kerio.com register.kerio.com control-update.kerio.com support.keriocontrol.gfi.com Verification Steps Navigate to Content Filter Applications and Web Categories and enter any website (e.g., google.com

Navigate to Configuration > Content Filter > Web Filter and look at the license status. If it says "Expired," you must renew your subscription.

Web Filter categorization disabled. Serial number: ko-197974 You can manually disable this safety check via

Alternatively, click and re-enter your license key to refresh the registration file. 2. Fix Appliance DNS Settings

The Web Filter module license is either missing, mismatched, or expired. Step-by-Step Fixes Fix 1: Modify the Reliability Check via SSH