This critical issue typically stems from . Below is a complete guide to diagnosing and fixing the underlying causes. Direct Root Causes
The Kerio Control Web Filter is not activated - categorization is disabled error is a critical failure of a core security module. However, it is also a highly diagnosable problem with a clear set of troubleshooting steps.
To resolve this "disabled" state, administrators often use the following official GFI Support steps:
Troubleshooting "Kerio Control Web Filter is Not Activated / Categorization is Disabled"
Click , hit Apply , and reboot the firewall appliance to clear out old cache files. 2. Disable Reliability Detection via SSH This critical issue typically stems from
Ensure the DiaServerUrl value in your configuration is set to v4.url.zvelo.com .
: Kerio Control performs automatic DNS health checks. If 10 consecutive queries fail within one minute, the system marks the Web Filter as "not reliable" and disables it.
Alternatively, via CLI:
Web Filter categorization disabled. Serial number: ko-197974 However, it is also a highly diagnosable problem
If the service is stuck in a frantic "hot" retry loop, force a reset:
If the filter keeps disabling due to minor network fluctuations, you can disable the "Reliability Detection" feature via the Kerio Control Console: Connect to your Kerio Control appliance via . Navigate to the directory: cd /opt/kerio/winroute .
If Kerio Control cannot resolve the update server addresses, the synchronization fails. Go to .
The Web Filter is a premium add-on component. If you run an unregistered or trial deployment, the component turns itself off 30 days after installation. Open the administrator dashboard. Go to > License Details . categorization is disabled." Often
Ensure your primary and secondary DNS forwarders are operational (e.g., Google DNS 8.8.8.8 or Cloudflare 1.1.1.1 ).
Imagine this: You are in the middle of a busy workday. A user reports they can suddenly access Netflix, Reddit, or a known malware site. You log into your Kerio Control firewall (formerly WinRoute) and navigate to the section. Instead of the usual green checkmarks, you are greeted with a red warning: "Web Filter is not activated, categorization is disabled." Often, administrators notice a specific artifact appended to this description: "hot."
Do you need the specific to check your current license status or verify the winroute.cfg contents?