Kerio Control Web Filter Is Not Activated Categorization Is Disabled Hot

Web Filter categorization disabled. Serial number: ko-197974

Go to → Network → DNS .

| | Typical Symptom | |-----------|----------------------| | Expired or missing license | Web Filter shows "Not Activated" in Dashboard; grace period ended. | | DNS resolution failure | Kerio Control cannot resolve update.gfi.com or category cloud servers. | | Firewall rules blocking the appliance itself | Local policy prevents Kerio Control from outbound HTTPS (port 443). | | Corrupted local cache | Database files for categories are damaged. | | Proxy mode misconfiguration | Using transparent proxy on a non-standard port without proper SSL interception. | | Time/date sync issue | Certificate validation fails if system time is incorrect. | | Version-specific bug | Known issues in older releases (e.g., 9.2.x, 9.3.x). |

There are three primary reasons why this status occurs:

: Once logged in, find the section related to the web filter. This could be under "Configuration" > "Content Filtering" > "Web Filter". Web Filter categorization disabled

This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later.

Ensure the following services are :

When you see "Web Filter is not activated, categorization is disabled," the firewall has lost communication with that database or the licensing server. The tag usually refers to a transient, high-priority failure state—often indicating a timeout or a license reset that requires immediate re-activation.

The service will re-download category data from GFI (may take 5–15 minutes). | | DNS resolution failure | Kerio Control

As mentioned, Kerio Control uses Zvelo's infrastructure. The communication is secured with an authorization token. These tokens have a limited lifespan and must be renewed periodically.

user wants a comprehensive article about the Kerio Control error "web filter is not activated categorization is disabled hot". This seems like a technical support article. I need to search for the cause, solutions, and context for this error. I'll start by searching for the exact error message and then look into related topics like web filtering, categorization, licensing, and troubleshooting. search results show several relevant pages. I need to open them to gather detailed information. I'll open the first few results, including the one from support.keriocontrol.gfi.com and others. search results provide a good amount of information. I will structure the article with an introduction explaining the error, its primary causes (license issues, DNS and connectivity, authorization token expiration), and then provide comprehensive solutions. I'll also include a section on related errors and a conclusion. The article will be long and detailed, drawing from the provided sources."Kerio Control Web Filter Is Not Activated - Categorization Is Disabled" is an error that points directly to a breakdown in one of the firewall's most critical security functions. This article provides a detailed guide to understanding why this happens and, more importantly, how to fix it efficiently.**

After installing a new license, restart the Kerio Control Filtering Service via Status → Services .

Resolving Web Filter Invalid authorization failures - KerioControl | | Proxy mode misconfiguration | Using transparent

: Ensure that your Kerio Control's web filter database is up to date. An outdated database might lead to incorrect categorization or failure to block/allow sites as intended.

To permanently resolve the error and restore secure web categories, execute the following technical deployment steps in your administration infrastructure: 1. Configure Custom DNS Forwarding Rules

Test by creating a temporary rule: Block category “Streaming” → Visit YouTube → Should be blocked.