Kerio Control | Web Filter Is Not Activated Categorization Is Disabled Work

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SSL/TLS certificates secure the categorization API. If the firewall’s system time is off by more than a few minutes, certificate validation fails, and categorization is automatically disabled.

If your license has expired, you must renew it through your vendor. After obtaining a new license file: This public link is valid for 7 days

The Web Filter uses an external service (Zvelo) which requires a valid authorization token. These tokens expire every . If your DNS settings prevent the token from renewing, categorization will be disabled.

The most common cause is that the Kerio Control Web Filter license has expired or is invalid. As noted in 1.2.2 , an invalid authorization error ("FAILURE: Invalid authorization") indicates that the registration server cannot verify your license. Can’t copy the link right now

Even with licensing and DNS resolved, the Web Filter may be manually disabled:

A surprisingly frequent cause of Web Filter failures is an incorrect system time on the Kerio Control appliance. If the system time is significantly off, it can break HTTPS/TLS certificate validation and prevent the firewall from securely communicating with the web categorization servers. If the firewall’s system time is off by

If the Web Filter module is disabled, you will see the error immediately.

prevents ISP DNS throttling when the Web Filter makes many requests to Zvelo's database. To configure:

Set up email alerts for Web Filter alerts in the Alerts settings.