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

Flush the DNS cache within Kerio Control by clicking the button under the DNS module. 4. Adjust Traffic Rules for Cloud Communication

The "Kerio Control Web Filter is not activated" error is almost always resolved by addressing or forcing a manual license synchronization . By systematically auditing your connection rules, updating DNS to a public provider, and clearing out stuck cache directories over SSH, you can restore full web categorization and bring your network policies back online.

Outbound traffic from the Kerio host itself to the licensing servers is being blocked by upstream ISP routers or misconfigured traffic rules. Flush the DNS cache within Kerio Control by

If Kerio Control fails 10 consecutive DNS check queries within 1 minute, it considers the Web Filter "unreliable" and disables it automatically. support.keriocontrol.gfi.com Fix via SSH cd /opt/kerio/winroute ./tinydbclient "update SiteFilter set DetectReliability=0" /etc/boxinit.d/60winroute restart Use code with caution. Copied to clipboard

: Use a client like PuTTY to SSH into your Kerio Control appliance. Execute the Fix : support

Try disabling and re-enabling the Web Filter to resolve activation issues.

Changes to GFI Software’s licensing backend can occasionally cause older product keys to desynchronize. Log into your online. By systematically auditing your connection rules

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

The Zvelo categorization servers must be resolved correctly. Some public DNS servers can cause the "Invalid authorization" error.

SSH into the box or access local console