Kerio — Control Web Filter Is Not Activated Categorization Is Disabled Fixed

Check your forwarder settings. If you are using ISP-provided DNS servers that are unstable, replace them with reliable public DNS resolvers.

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

If your Kerio Control is behind another router or ISP firewall, it must be allowed to communicate with the activation servers.

SSL/TLS connections to update servers fail if your system clock is wrong. Go to > Advanced Options > Time Server . Enable NTP synchronization. Ensure the Time Zone matches your actual location. 5. Check Proxy Settings Check your forwarder settings

Test network and DNS

On Windows-based Kerio Control installations, the web filter module may fail to register with the OS.

Before diving into solutions, it helps to understand why this happens. The web filter relies on a few key components: SSL/TLS connections to update servers fail if your

The Web Filter relies heavily on DNS to communicate with the Zvelo servers. Incorrect DNS settings are a frequent cause of "Invalid Authorization" errors.

This article addresses the common "Kerio Control Web Filter is not activated; categorization is disabled" error. This issue typically prevents the firewall from effectively blocking or allowing websites based on their category, leaving your network vulnerable or causing connectivity disruptions. Understanding the Error

Even if the web filter is active, it might appear "not activated" if your content rules are not correctly set up. Ensure the Time Zone matches your actual location

So, why does the Kerio Control web filter not activate, and categorization become disabled? There are several possible causes:

Review SSL inspection / proxy settings

Check Web Filter status and logs