Kerio Control Web Filter Is Not Activated Categorization Is Disabled Fixed ((hot)) May 2026

When your Kerio Control Web Filter shows as "not activated" and categorization is disabled, it is typically caused by license issues, DNS resolution failures, or an expired Zvelo authorization token. 🛠️ Step-by-Step Fixes 1. Fix DNS Forwarding for Zvelo

By following the steps outlined in this write-up, you should be able to resolve the issue of the Kerio Control Web Filter not activating or categorization being disabled. If the problem persists, consider seeking assistance from Kerio Control support or a qualified network administrator. Regularly updating and monitoring your Kerio Control installation can help prevent such issues and ensure optimal performance. When your Kerio Control Web Filter shows as

1. Go to Status > Interfaces.
2. Ensure the firewall has internet connectivity.
3. Navigate to Configuration > DNS.
4. Ensure valid DNS servers are configured (e.g., Google DNS 8.8.8.8 or your ISP DNS). If the firewall cannot resolve DNS, it cannot download the category list, and the Web Filter will default to "disabled."

This forces the system to keep the Web Filter active regardless of DNS response timeouts. C. Verify License Activation Ensure the Web Filter module has a valid license. Check the License Registration status on the dashboard. Go to Status > Interfaces

Without categorization, the firewall was blind. Employees could wander into the darkest corners of the internet, and Mark’s beautifully crafted security policies were nothing more than suggestions. The Investigation This forces the system to keep the Web

How to Fix "Kerio Control Web Filter is Not Activated, Categorization is Disabled"

Do you see any "Certificate" or "Time Sync" errors in your logs?

Ensure "Kerio Control Web Filter" is checked in Content Filter settings.