Kerio Control Web Filter Is Not Activated Categorization Is Disabled Work Link

: The Web Filter relies on reaching *.zvelo.com . Configure custom DNS forwarding for this domain to reliable servers like Cloudflare ( 1.1.1.1 ) or OpenDNS ( 208.67.222.222 ) rather than internal or ISP servers that might time out.

If the system text or logs say or "Web Filter is not activated," the firewall cannot identify what type of traffic is passing through. Consequently, it cannot enforce rules based on those categories (e.g., "Block Gambling"), causing the filter to effectively stop working or allow all traffic.

Once you've resolved the problem, following these best practices can help prevent it from recurring:

Under , choose URL Hostname instead of choosing an application category. : The Web Filter relies on reaching *

Uncheck , click Apply , wait 30 seconds, re-check it, and click Apply again. This restarts the backend categorization daemon. 6. Address the Legacy "Cyren" Sub-Engine Issue

The "Kerio Control Web Filter is not activated. Categorization is disabled" error is serious but entirely solvable. By systematically verifying your license, enabling the module, checking DNS connectivity, and, if necessary, resetting the reliability detection via SSH, you can restore full filtering functionality to your network.

This specific error in Kerio Control typically occurs when the firewall loses its connection to the categorization servers or encounters a DNS timeout Consequently, it cannot enforce rules based on those

If the box is already checked, uncheck it, save, then re-check and save again. This forces a reinitialization of the categorization service.

Leo stared at the Kerio dashboard. The message was still there, mocking him:

If a legitimate website is being blocked, you can manually whitelist it by adding the URL to the exceptions list in the same section. This restarts the backend categorization daemon

Several factors can contribute to the Kerio Control web filter not being activated, including:

: Change your custom DNS forwarding servers for *.zvelo.com to Cloudflare ( 1.1.1.1 ) or OpenDNS ( 208.67.222.222 ).

If your network connects to the internet via a corporate proxy, Kerio Control must be told to use it.

This guide provides a comprehensive overview of why this issue happens, how to troubleshoot it, and the necessary steps to restore functionality. What Does "Web Filter Not Activated/Disabled" Mean?

The error message "Kerio Control Web Filter is not activated. Categorization is disabled." can be triggered by several distinct scenarios. Correctly identifying the root cause is the first step toward an effective solution.