Ensure the value v4.url.zvelo.com is correctly set in the configuration file located at /opt/kerio/winroute/winroute.cfg .
The error typically occurs when the firewall cannot reach the Zvelo categorization servers or when the license token has expired. This is often triggered by DNS failures, where the system marks the filter as "unreliable" after multiple failed connection attempts. Core Troubleshooting Steps 1. Verify DNS and Reachability
Note that the Web Filter is disabled by default for the Guest Interface to allow users to reach the welcome page without authentication. Ensure the value v4
If the filter keeps disabling due to minor network fluctuations, you can disable the "Reliability Detection" feature via the Kerio Control Console: Connect to your Kerio Control appliance via . Navigate to the directory: cd /opt/kerio/winroute .
Ensure your Kerio Control Web Filter license is active. Without a valid subscription, the module defaults to a trial state and eventually disables itself. Core Troubleshooting Steps 1
Do you need the specific to check your current license status or verify the winroute.cfg contents?
Web Filter categorization disabled. Serial number: ko-197974 Navigate to the directory: cd /opt/kerio/winroute
Sometimes a simple reboot after changing DNS settings is required to force a new token request. 3. Advanced SSH Fix (Disable Reliability Detection)