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

This message indicates that Kerio Control's URL filtering engine—which categorizes websites (e.g., Social Media, Malware, Adult Content)—is either unlicensed, misconfigured, or experiencing a service interruption. When this happens, any firewall rule relying on will fail silently, potentially allowing blocked content or blocking allowed content depending on your rule logic.

: Kerio Control relies on DNS to communicate with the Zvelo update servers for web categorization. Unreliable ISP connections, slow internet link speeds, or incorrect DNS forwarding settings can cause these automated checks to fail. This is a frequent root cause of the categorization disabled error. This message indicates that Kerio Control's URL filtering

: In many cases, a simple reboot restores connectivity and reactivates the filter automatically. Unreliable ISP connections, slow internet link speeds, or

For categorization to work accurately on secure sites, ensure HTTPS Filtering (decrypt and filter) is enabled under Content Filter > HTTPS Filtering . For categorization to work accurately on secure sites,