Kerio Control Web Filter Is Not Activated Categorization Is Disabled Fixed !!better!! May 2026

Ensure your Kerio Control is using reliable DNS servers (like 8.8.8.8 or 1.1.1.1) under Configuration > DNS . 3. Clear the Web Filter Cache

The Kerio Control Web Filter is a premium add-on service powered by Cyren (or GFI, depending on your version). It requires a valid, active subscription. Go to Status > License Details .

Click Update License Info to force the appliance to check in with the GFI servers. 2. Check DNS Resolution on the Firewall Ensure your Kerio Control is using reliable DNS

Go to Status > System Health and use the Debug or Ping tool (or SSH into the box). Try to ping google.com or ://kerio.com .

By following these steps, you should see the status change to and your categorization rules will resume functioning immediately. It requires a valid, active subscription

Ensure HTTPS (Port 443) and HTTP (Port 80) are open for the firewall’s own outbound traffic.

GFI/Kerio frequently updates the URLs used for categorization and licensing. If you are running a very old version of Kerio Control, it may be trying to contact a retired server. Go to . or malware sites)

If you are seeing the error in your Kerio Control administration interface, your network's content filtering has essentially been paralyzed. This error prevents the firewall from identifying website categories (like social media, gambling, or malware sites), meaning your custom URL rules won’t work.