Sometimes the service is simply turned off. To fix this:
/etc/init.d/kerio-control stop rm -f /var/kerio/kerio-control/categorization.db* /etc/init.d/kerio-control start
The Kerio Control Web Filter uses real-time cloud lookups (powered by Webroot/BrightCloud) to categorize websites. If the firewall cannot resolve these cloud server addresses, categorization is automatically disabled. Sometimes the service is simply turned off
: Ensure your license includes the "Kerio Control Web Filter" module. GFI Support 4. Firewall Blocking Update Servers
The error is almost always resolvable without reinstalling the entire firewall. In most cases, the root cause is either a simple licensing expiration, a DNS failure, or a corrupted local database. : Ensure your license includes the "Kerio Control
: Through the SSH console, verify that the DiaServerUrl in /opt/kerio/winroute/winroute.cfg is set to v4.url.zvelo.com . Phase 3: Technical Fix via SSH
For network administrators using the Kerio Control firewall, encountering the error is a critical issue. This error completely halts URL traffic filtering, leaving your network vulnerable to malicious websites and unauthorized content. In most cases, the root cause is either
Look at the Dashboard license tile to ensure it's not in "Trial" or "Unregistered" mode.
The Kerio Control Web Filter relies on a cloud-based categorization database (powered by Kerio's security partners, such as Cyren or Webroot, depending on your version). When the Kerio Control appliance cannot validate its license or connect to the cloud categorization servers, it disables the web filter entirely to prevent system instability. Root Causes of the Activation Failure
If the license is active but shows an error, click to force a sync with the GFI/Kerio activation servers. Step 2: Fix DNS and Connectivity Issues