Outbound traffic from the Kerio host itself to the licensing servers is being blocked by upstream ISP routers or misconfigured traffic rules.
The categorization database is downloaded from GFI’s update servers. If your firewall blocks its own updates, you’ll see this error.
Use an SSH client (like PuTTY) to log into your Kerio Control appliance using root credentials. Stop the Kerio Control engine by running: /etc/boxinit.d/60winroute stop Use code with caution.
: Do not use Google's DNS (8.8.8.8) as the primary forwarder for *.zvelo.com . Outbound traffic from the Kerio host itself to
The web filter relies on URL categorization databases. If categorization is disabled or fails to load, the filter won’t activate.
The system reveals its logic: Kerio Control sends automatic DNS queries to reach update servers. If these fail 10 times in a row within a single minute, the filter decides it can't be trusted and shuts down its categorization engine. This is often caused by: DNS Reliability
If you recently reinstalled, ensure you have completed the Activation Wizard . Quick Verification Steps Use an SSH client (like PuTTY) to log
Large time drifts can cause certificate and token failures. Ensure the system time is synchronized. Verify Admin Settings: Navigate to Content Filter Applications and Web Categories
This article provides to permanently fix this issue, ranging from simple licensing checks to advanced command-line resets.
If the license is active, navigate to -> Activation . The web filter relies on URL categorization databases
By following these steps and ensuring that your Kerio Control software is correctly configured, you should be able to resolve the issue of the web filter not being activated and categorization being disabled.
If it returns a category, the filter is active. If it says "Unable to categorize," the authorization issue persists. support.keriocontrol.gfi.com To help you further, could you let me know: of Kerio Control are you running? Do you see an " Invalid Authorization DNS response timeout " error in your Software Maintenance currently active?
