: Kerio Control sends automated DNS health checks to update servers. If it fails to get a response 10 consecutive times within 1 minute, it flags the connection as unreliable and disables categorization.
Fix DNS forwarders or bypass internal DNS for Kerio's update domains. : Kerio Control sends automated DNS health checks
To force the Web Filter back into an active state and prevent it from disabling itself due to "unreliability," you can disable the reliability check using the GFI Support recommended commands: Log in to the Kerio Control console via SSH (e.g., using Navigate to the configuration directory: cd /opt/kerio/winroute Disable the reliability detection and reset the status: ./tinydbclient "update SiteFilter set DetectReliability=0" Restart the Kerio Control engine: /etc/boxinit.d/60winroute restart support.keriocontrol.gfi.com Permanent Fixes & Troubleshooting To force the Web Filter back into an
If the hotfix above does not resolve the issue permanently, check these configurations: Custom DNS Forwarding check these configurations: Custom DNS Forwarding