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

Usually 1–5 minutes. Restart the firewall engine for immediate effect.

| Preventive Measure | Why | |--------------------|-----| | Set up monitoring alerts | Receive email notification if categorization stops. | | Regularly check license expiry | Add a calendar reminder 30 days before renewal. | | Use redundant DNS servers | Prevents single-point-of-failure resolution issues. | | Document upstream proxy changes | Any proxy change requires updating Kerio. | | Test after updates | Category servers change IPs; test every quarter. | Q1: Can I use Kerio Control without cloud categorization? Yes, but only with static URL lists, IP-based rules, or by disabling web filtering entirely. Dynamic filtering will not work. Usually 1–5 minutes

If categorization is disabled , the appliance cannot query the cloud. Consequently, no website receives a category, and all content rules dependent on categories fail silently. | | Regularly check license expiry | Add

Indirectly. HTTPS filtering (SSL inspection) is separate. However, if categorization is disabled, you cannot block HTTPS sites based on category, even if SSL inspection is on. | | Test after updates | Category servers

This article explains why this message appears, the seven most common causes, and step-by-step solutions to restore full web filtering functionality. To understand the error, you must first know how Kerio Control’s web filter works.