Kerio Control Web Filter Is Not Activated Categorization Is Disabled Hot Jun 2026

Your firewall automatically disables categorization when backend synchronization loops fail. The security framework relies on persistent, low-latency lookups to classify active browsing sessions. The primary causes for this specific disruption include:

Remove the corrupted database or update files (Note: exact paths may vary slightly by version; ensure you back up files if unsure): rm -rf * Use code with caution. Restart the Kerio Control service: /etc/boxinit.d/60kcontrol start Use code with caution.

shows: Categorization: Enabled License: Valid Database version: [date]

We recommend using reliable public resolvers like Google DNS ( 8.8.8.8 and 8.8.4.4 ) or Cloudflare ( 1.1.1.1 ). Restart the Kerio Control service: /etc/boxinit

Click and check if the current time matches your actual local time exactly. 4. Configure Traffic Rules for Kerio Updates

Document version: 1.0 – Applicable to Kerio Control 9.x and later.

Restart the service:

Click the button and accept the security warning.

| | 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). |

Establish an to your Kerio Control appliance using a client like PuTTY. Log in using your root administrative credentials. Navigate to the installation directory by running: cd /opt/kerio/winroute Use code with caution. Restart the Kerio Control service: /etc/boxinit

Ensure that Kerio Control can reliably resolve DNS names for its own servers. Using problematic custom DNS servers is a frequent cause.

For system administrators and IT professionals relying on to secure their network, the Web Filter is not activated alert is an immediate red flag. This error signifies that the firewall's ability to inspect, categorize, and filter web content based on URL ratings is compromised. When this module fails, your carefully constructed content filtering policies become ineffective, leaving the network potentially vulnerable and users with unrestricted access to all websites.