Kerio Control Web Filter Is Not Activated Categorization — Is Disabled Hot Fixed

: The synchronization framework relies on authentication key tokens provided via Kerio centralized registry pools. These authorization tokens expire every 21 days. If standard upstream requests time out, the system cannot fetch valid tokens, showing an Invalid Authorization fault in the warning log.

: If "Invalid Authorization" appears in logs, it may be due to an expired Zvelo key token (usually valid for 21 days), often caused by specific DNS forwarding issues. support.keriocontrol.gfi.com SSH commands

: 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. : The synchronization framework relies on authentication key

Remove the cache directory:

: After making DNS changes, a full reboot is often required to clear the "Invalid Authorization" status and fetch a fresh 21-day token. support.keriocontrol.gfi.com Verify Basic Activation : If "Invalid Authorization" appears in logs, it

The keyword "hot" likely refers to the urgency of this issue. Because disabling categorization directly impacts security and compliance (e.g., allowing access to malware or explicit content), administrators need a hot fix immediately.

While troubleshooting, you can maintain some control by using instead of category-based ones. Since categorization is disabled, rules that rely on "Applications and Web Categories" will fail, but manual rules (e.g., blocking facebook.com directly) will still work. Remove the cache directory: : After making DNS

Open the primary configuration file located at /opt/kerio/winroute/winroute.cfg . Find the DiaServerUrl property.

Click the button and accept the security warning.

Check the box for and click Edit (or Add ). Set the DNS name field to exactly *.zvelo.com .