Troubleshooting Kerio Control: "Web Filter is Not Activated, Categorization is Disabled"
This effectively neuters your firewall’s ability to block social media, malware domains, or adult content. Without categorization, your URL rules become useless. This article provides a deep-dive into why this happens and a step-by-step guide to reactivating the filter.
Keep standard configuration backups saved to MyKerio or an external FTP server.
If you just purchased a renewal, go to tab and click Update License Info to pull the new dates from the Kerio servers. 2. Fix System Time and NTP Settings Troubleshooting Kerio Control: "Web Filter is Not Activated,
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To ensure the filter is correctly set up once the activation issue is resolved: Enable the Filter : Navigate to Content Filter Applications and Web Categories and ensure Enable Kerio Control Web Filter is checked. Test a URL
Are you seeing a specific error in the logs, or is the checkbox just grayed out? Using Kerio Control Web Filter Keep standard configuration backups saved to MyKerio or
: High latency or a slow internet link can prevent the system from reaching the update servers. Expired Authorization Tokens
Ensure your WAN interface has reliable DNS servers configured. Try changing to public DNS (e.g., ) to test if your ISP's DNS is the bottleneck. 4. Check Content Filter Rules
Click . (Note: Ensure you have your License Number handy before doing this). Fix System Time and NTP Settings This public
The firewall cannot reach the Kerio activation and categorization servers.
: Navigate to Configuration > DNS . Check Enable custom DNS forwarding and add a rule for *.zvelo.com to use Cloudflare (1.1.1.1) or OpenDNS (208.67.222.222) instead. 3. Fix Licensing and Activation Issues