Kerio Control Web Filter Is Not Activated Categorization Is Disabled Hot Guide

Are you using a , a virtual machine, or a software installation?

Step 2: Override the Local Reliability Detection Logic via SSH

Kerio Control's reliability depends on stable DNS resolution to reach its update servers. The firewall performs automatic DNS checks to confirm connectivity. This process is often the source of the problem.

If your local internet connection suffers from high latency or sporadic packet drops, Kerio’s built-in "Reliability Detection" mechanism will aggressively disable the Web Filter. You can turn off this safety check using the command line. Enable SSH access in the Kerio Control advanced settings.

If the system time on your Kerio Control appliance differs significantly from actual time, SSL/TLS handshakes with registration servers will fail. Are you using a , a virtual machine,

: Zvelo key tokens expire every 21 days. If your firewall has been offline or has incorrect time settings, it may fail to update this token. Advanced CLI Solution (If Reliability Check is Stuck)

Ensure the status box shows an active green state without error banners.

Confirm that the expiration date is valid.

: If the system date and time on the firewall appliance drift, the SSL/TLS handshakes needed to renew security licenses or fetch URL updates will fail. Step-by-Step Resolution Strategies Method 1: Bypass the Reliability Detection Check via SSH This process is often the source of the problem

By following this guide, you should restore full URL categorization within 30 minutes and prevent future recurrences through proactive monitoring.

Add a rule :

Kerio Control is a comprehensive network security solution that provides firewall protection, VPN, and content filtering. The web filter is a crucial component that allows administrators to control and monitor internet access, block specific web categories, and ensure that users are not accessing inappropriate or harmful content.

Start with and Step 5 (DNS) – these resolve the majority of "hot" support tickets. For persistent issues, enable debug logs and contact GFI support with the output. Enable SSH access in the Kerio Control advanced settings

Do you need the specific to check your current license status or verify the winroute.cfg contents?

typically indicates a communication failure between your Kerio Control appliance and the backend categorization servers (Zvelo)

If the issue persists, check for any hotfixes or updates for Kerio Control. GFI (the company behind Kerio) periodically releases updates and hotfixes that can resolve known issues.

For categorization to work accurately on secure sites, ensure HTTPS Filtering (decrypt and filter) is enabled under Content Filter > HTTPS Filtering .