Kerio Control Web Filter Is Not Activated Categorization Is Disabled Work ^new^ (Recommended × 2027)
Kerio Control sends automatic DNS queries to reach update servers. If these fail 10 times in a row, categorization is automatically disabled for reliability.
For persistent cases where the Web Filter remains disabled despite restored connectivity, you must manually reset the reliability detection mechanism via SSH. This is the definitive fix for the Serial number: ko-197974 error. Kerio Control sends automatic DNS queries to reach
Kerio Control sends automatic DNS queries to reach update servers. If these fail 10 times in a row, categorization is automatically disabled for reliability.
For persistent cases where the Web Filter remains disabled despite restored connectivity, you must manually reset the reliability detection mechanism via SSH. This is the definitive fix for the Serial number: ko-197974 error.
To avoid issues with the Kerio Control web filter in the future, follow these best practices:
Unable to categorize 'example.com' by Kerio Web Filter. DNS response 'FAILURE: Invalid authorization'
: Hold Shift while clicking Status > System Health in the admin interface and click Enable SSH . Connect via SSH using an app like PuTTY.
