Kerio Control Web Filter Is Not Activated Categorization Is Disabled Hot Jun 2026

💡 If the error persists, check the Debug Log . Right-click in the log window, select Messages , and enable "Web Filter" and "License" logging to see exactly why the connection is dropping. If you'd like, let me know: What version of Kerio Control are you running? Is your license currently valid or recently expired? Are you seeing any DNS or connection errors in the logs? Share public link

: Users report that when the filter is "disabled," the entire security policy for web access may fail open or closed depending on configuration, leading to either security gaps or frustrated users unable to access legit sites.

Kerio Control sends automated background check queries to ensure its update servers are reachable. If these queries fail 10 times in a row within a single minute, the firewall marks the Web Filter as unreliable and disables it. 💡 If the error persists, check the Debug Log

Access your Kerio Control console via SSH (e.g., using PuTTY ). Navigate to the directory: cd /opt/kerio/winroute .

At its heart, Kerio Control's Web Filter relies on a third-party service, currently provided by , to maintain a dynamic, real-time database of website categorizations. When a user requests a webpage, the firewall sends a query to this service. The service responds with the page's category (e.g., "Social Networking," "Streaming Media," "Productivity"). Based on this rating and your predefined content rules, Kerio Control either allows or denies the connection. Is your license currently valid or recently expired

Once you have completed these steps, you must check if the database is communicating correctly:

The consequences of having an inactive web filter and disabled categorization include: Kerio Control sends automated background check queries to

If the filter keeps disabling due to minor network fluctuations, you can disable the "Reliability Detection" feature via the Kerio Control Console: Connect to your Kerio Control appliance via . Navigate to the directory: cd /opt/kerio/winroute .