| Item | Expected Status | |------|----------------| | License → Web Filter | Licensed | | Web Filter → Categorization | Enabled (green) | | Last update | Within 24 hours | | Test a known category | e.g., facebook.com → Shows Social Networking |
Clear cache / reset web filter settings
| Component to Check | Action | Expected Result | | :--- | :--- | :--- | | | Navigate to Logs > Warning Log | No new "Invalid authorization" or "categorization disabled" errors. | | Test URL Categorization | Under Content Filter > Applications and Web Categories , use the "Test URL" tool with a common site like google.com . | The tool returns a category (e.g., "Search Engines / Portals") without an error. | | Manual URL Check | Go to Content Filter > Applications and Web Categories and click the Add button. Enter a test URL (e.g., youtube.com ). Ensure the "Detected Content" column shows a category. | The category is displayed, confirming the filter is working. | | User Experience | Ask a non-admin user to browse to a known blocked category. | The site is blocked, and a block page is shown, confirming policy enforcement. | | Item | Expected Status | |------|----------------| |
Kerio downloads a local copy of the categorization database. If that database is outdated or corrupt, forcing a fresh download helps. | | Manual URL Check | Go to
Ensure it points to a reliable public DNS server rather than an internal loop. We recommend using robust public DNS servers for testing: 8.8.8.8 and 8.8.4.4 Cloudflare DNS: 1.1.1.1 | The category is displayed, confirming the filter
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.
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