Kerio Control Web Filter Is Not Activated Categorization Is Disabled Fixed | ULTIMATE → |

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

He corrected the system time to the current second. NTP Refresh: He forced a synchronization with pool.ntp.org . Service Restart: He toggled the Web Filter off and back on.

The firewall cannot resolve the hostnames of the external categorization servers.

Misconfiguration can make it seem like web filter is inactive.

Ensure your firewall allows outgoing traffic on (HTTPS) and Port 80 (HTTP) to Kerio's update servers. Ensure your Kerio Control is using reliable DNS

user wants a long article about fixing the "Kerio Control web filter is not activated, categorization is disabled" error. I need to provide a comprehensive troubleshooting guide. I'll follow the search plan provided. search results from the initial plan have provided several promising leads. Result 0 appears to be a support article about resolving web filter categorization issues, result 1 discusses invalid authorization, result 2 covers license activation failures, and result 3 provides information on web filter licensing. I should open these to gather detailed information for the article. article "Resolving Web Filter Invalid authorization failures" provides a clear solution related to DNS settings and Zvelo tokens. "Warning Logs in Kerio Control" shows examples of the error messages. The license activation article explains connectivity and storage issues. The "Kerio Control Licensing Process" outlines optional components like the Web Filter. These are all relevant to the user's query. I should also search for information on how to enable the web filter and possibly about reliability detection. 0 seems to be about disabling reliability detection. This might be part of a workaround. I should open it. article provides a specific fix via SSH commands to disable reliability detection. Now I have a good set of sources covering the error's causes and solutions. I'll structure the article with the following sections: introduction, understanding the error and the importance of licensing, configuring DNS forwarding correctly, setting correct system time and connectivity, addressing token expiration with SSH modifications, disabling reliability detection as a temporary workaround, final checklist for verification, and a conclusion. I will cite the relevant sources throughout. message "Kerio Control web filter is not activated, categorization is disabled" in your logs indicates a breakdown in the web filtering service. This often appears alongside entries like DNS response 'FAILURE: Invalid authorization' to query... . This guide provides a structured, step-by-step approach to diagnosing and resolving the root cause, covering essential areas from basic licensing to advanced command-line fixes.

If the filter remains disabled due to network instability, you can manually disable the "Reliability" check.

The error is a common issue that strips away your network's primary line of defense. When this error occurs, your firewall stops sorting websites into categories like "Gambling," "Social Media," or "Malware," leaving your entire network exposed to security threats and productivity leaks.

By systematically working through the fixes – from restarting the service to forcing a database update and verifying outbound connectivity – you can restore full categorization. Once fixed, your web filtering policies (blocking adult content, social media during work hours, or malicious sites) will function correctly again. NTP Refresh: He forced a synchronization with pool

: Kerio Control sends automatic DNS queries to update servers. If it fails to receive a response 10 times within 1 minute, it marks the Web Filter as "unreliable" and disables categorization. Invalid Authorization : This often stems from an expired

Run the following command: /etc/boxinit.d/60kerio-webfilter restart Verify the status in the UI after a few minutes. 4. Final Verification

Standard ISP or Google DNS servers (8.8.8.8) can cause authorization token failures for the domain *.zvelo.com . Redirecting these specific queries to faster public resolvers resolves the authentication loop.

Use a reliable, universal NTP server pool such as pool.ntp.org or ://google.com . Misconfiguration can make it seem like web filter

Even if your license appears active, re-entering it can re-trigger the activation of the web filter module.

This article provides a comprehensive guide to understanding this error, why it occurs, and how to permanently, allowing you to re-enable web filtering and ensure your network security. 1. Understanding the Error: What Does This Mean?

If the trial period (30 days) has ended and a specific license was not purchased, categorization will be disabled. Manual Enablement: Content Filter Applications and Web Categories and ensure Enable Kerio Control Web Filter is checked. License Refresh: If you recently renewed, you may need to perform an offline registration by downloading the license file from the Kerio Product Registration page 4. Checking the Logs If the status persists, check the Error logs

Then re-download categories.

If your firewall cannot reach the internet, perform an by importing a .key file through the Configuration Assistant . 3. Verification of Fix

Expired software maintenance or missing Kerio Control Web Filter add-on licenses.