The filter uses a token that expires every 21 days. If your system time is incorrect or you are using blocked DNS servers, the "Invalid Authorization" error may trigger. Ensure your is synced with an NTP server. Check the Error Log for "Invalid Authorization" messages. Manual Activation
: In the administration interface, go to Advanced Options > SSH and enable it. The filter uses a token that expires every 21 days
This message means Kerio Control’s web filtering engine cannot categorize or block web content because the URL categorization service is offline or disabled. As a result, the Web Filter feature won’t evaluate sites by category and will either allow or block traffic only by IP/URL rules or default policy. The steps below diagnose common causes and restore categorization and web filtering. Check the Error Log for "Invalid Authorization" messages
: Restart the Kerio Control appliance after making DNS changes. Fix 2: Disable Reliability Detection via SSH As a result, the Web Filter feature won’t
: The Web Filter uses a Zvelo key token that expires every 21 days. If your firewall hasn't been able to reach the registration servers, this token will lapse.
Ensure your firewall allows outgoing traffic on (HTTPS) and Port 80 (HTTP) to Kerio's update servers.
The error message "Kerio Control Web Filter is not activated, categorization is disabled"