Click , and then reboot the Kerio Control Appliance to clear out stale cached tokens.
Web Filter categorization disabled. Serial number: ko-197974
When Kerio Control flags this specific error, it means the underlying database engine (typically powered by Zvelo) cannot validate categories for requested URLs. The firewall safeguards network speed and reliability by disabling the filter entirely if it determines the engine is unresponsive. The primary causes include: Technical Mechanism Click , and then reboot the Kerio Control
Ensure outbound is completely unblocked on any upstream modem or carrier gateway, as Kerio needs this path to check license legitimacy.
This comprehensive guide breaks down the root causes of this error and provides a step-by-step framework to resolve it permanently. Direct Overview of the Core Causes The firewall safeguards network speed and reliability by
Add a rule :
If logs show an "Invalid Authorization" error, your Zvelo token may be stuck or expired. Direct Overview of the Core Causes Add a
Occasionally, the local cache of the categorization database becomes corrupt. You can force Kerio to redownload the module. Go to > Kerio Control Web Filter . Uncheck Enable Kerio Control Web Filter , click Apply . Wait 30 seconds, then re-check the box and click Apply .
Click the button and accept the security warning.
Ensure the following services are :