| | Typical Symptom | |-----------|----------------------| | Expired or missing license | Web Filter shows "Not Activated" in Dashboard; grace period ended. | | DNS resolution failure | Kerio Control cannot resolve update.gfi.com or category cloud servers. | | Firewall rules blocking the appliance itself | Local policy prevents Kerio Control from outbound HTTPS (port 443). | | Corrupted local cache | Database files for categories are damaged. | | Proxy mode misconfiguration | Using transparent proxy on a non-standard port without proper SSL interception. | | Time/date sync issue | Certificate validation fails if system time is incorrect. | | Version-specific bug | Known issues in older releases (e.g., 9.2.x, 9.3.x). |
Set your custom DNS forwarding servers for *.zvelo.com to ( 1.1.1.1 ) or OpenDNS ( 208.67.222.222 ). Avoid using only Google DNS (8.8.8.8) as it can sometimes cause these authorization failures. | | Corrupted local cache | Database files
The error "Web Filter categorization is disabled" usually occurs when Kerio Control determines the categorization service (provided by ) is unreliable due to failed DNS checks | | Version-specific bug | Known issues in older releases (e
to disable the reliability check and restart the service: | | Corrupted local cache | Database files