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

If the license is valid and the internet is working, the service may be stuck.

: After making DNS changes, a full reboot is often required to clear the "Invalid Authorization" status and fetch a fresh 21-day token. support.keriocontrol.gfi.com Verify Basic Activation

To resolve the error "Kerio Control Web Filter is not activated, categorization is disabled," you typically need to address communication issues with the

: Kerio Control sends automated background DNS queries to verify connection stability. If it fails to receive a response 10 consecutive times within 1 minute, the firewall marks the connection as unreliable and automatically disables the Kerio Control Web Filter . If the license is valid and the internet

Check the box for and click Edit (or Add ). Set the DNS name field to exactly *.zvelo.com .

If you have a license but it won't load, check for disk space issues. You may need to clear cache files from the /var/kerio/webctrl/ folder to free up room for the license file. Temporary Workarounds

Input a domain into the tool to verify classification. Web Admin Test Engine Authorization Audit Scan for FAILURE: Invalid authorization or timeout codes. Warning Log / Error Log If it fails to receive a response 10

Kerio Control's reliability depends on stable DNS resolution to reach its update servers. The firewall performs automatic DNS checks to confirm connectivity. This process is often the source of the problem.

Follow these steps in order to restore functionality.

If you want, I can produce a tailored checklist or step-by-step script for your specific Kerio Control version and environment—tell me the appliance OS/version, whether you use cloud categorization, and any recent changes. If you have a license but it won't

Navigate to > Applications and Web Categories . Ensure Enable Kerio Control Web Filter is checked.

Ensure its value is explicitly set to the official cluster: v4.url.zvelo.com . Save the file changes and restart the system. 4. Verify License Subscriptions and Trial Status

Navigate to in the web administration interface.