Kerio Control Web Filter Is Not Activated Categorization Is Disabled Hot _best_ May 2026

Troubleshooting Guide: "Kerio Control Web Filter is not activated. Categorization is disabled"

Introduction

If you are a network administrator managing a Kerio Control firewall (formerly WinRoute), you may have encountered a frustrating red banner or log entry stating:

  1. Go to Diagnostics > Ping.
  2. Ping update.kwf.kerio.com.
  3. Expected result: A reply.
  4. Next, test TCP port 443 (HTTPS) connectivity to the category servers.
  5. Pro-tip: If pings work but categorization fails, your firewall might block its own outgoing HTTPS requests. Check the Traffic Policy – ensure the Kerio Control engine itself is allowed to connect outbound (usually via the loopback or localhost).

Workaround 3: Roll back to a known good config

Restore a configuration backup from a date when the Web Filter was working. Sometimes a corrupt rule or mis-saved setting is the culprit. Troubleshooting Guide: "Kerio Control Web Filter is not

Fix Authorization & DNS IssuesCategorization often fails due to an "Invalid Authorization" error, which usually means the Zvelo key token (valid for 21 days) has expired or cannot be refreshed. Go to Diagnostics > Ping

If you want, I can produce a tailored checklist or step-by-step script for your specific Kerio Control version and environment—tell me the appliance OS/version, whether you use cloud categorization, and any recent changes. Workaround 3: Roll back to a known good

Check system time

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