Kerio Control Web Filter Is Not Activated Categorization Is Disabled Hot ~upd~ -

Kerio Control: Web Filter Not Activated & Categorization Disabled

"Kerio Control Web Filter is not activated, categorization is disabled"

The error message typically occurs because the firewall has failed to reach the external categorization servers (zvelo.com) multiple times, causing it to mark the service as unreliable and disable it . Immediate Fixes

| Action | Purpose | |--------|---------| | Monitor license expiry (30-day reminder) | Avoid unexpected expiration | | Whitelist Kerio’s update domains in outbound rules | Ensure categorization works | | Enable NTP and system health alerts | Prevent time sync failures | | Schedule automatic database updates | Keep categories current | | Backup configuration monthly | Quick restore after corruption | Kerio Control: Web Filter Not Activated & Categorization

"Web Filter is not activated": This does not necessarily mean you haven't purchased a license. In Kerio Control, this often refers to the engine responsible for scanning traffic being in a standby or error state. The system cannot process HTTP/HTTPS traffic for content rules.
"Categorization is disabled": Kerio Control relies on a cloud-based database (maintained by GFI/Kerio) to sort websites into categories (e.g., Gambling, Social Media, Malware). If categorization is disabled, the firewall cannot identify the content of a website, forcing it to apply the "Default" rule—which is often set to "Allow" or "Block" without nuance.

License or subscription issue — Web Filter/categorization subscription expired or not recognized.
Kerio Control update or database corruption — category DB failed to load.
Network/connectivity problems — appliance cannot reach the categorization service or update servers.
Misconfiguration — web filter disabled in policies or global settings.
Disk space or memory constraints — service failed to start.
Time/date misconfiguration — TLS or subscription validation fails due to incorrect system clock.
Software bug — known regression in specific Kerio Control versions.