Kerio Control Web Filter Is Not Activated Categorization Is Disabled Work [patched] May 2026

The "Kerio Control Web Filter is not activated / categorization is disabled" issue typically stems from connectivity failures to backend servers or license validation errors. Primary Causes and Solutions

The first wave was innocent. A freshman in Ms. Albright’s history class searched for "Roman Empire engineering." Without categorization, the filter didn't know if this was "Education" or "Weapons." The system defaulted to a limbo state—it let everything through, but it also forgot how to cache or prioritize. The "Kerio Control Web Filter is not activated

, causing the Web Filter to enter a "not activated" or "disabled" state for safety. support.keriocontrol.gfi.com Why this happens DNS Failures Attempt 3 automated re-enable attempts over 10 minutes,

Step 4: Check for "Deny" Rules Blocking the Service

Ironically, strict firewall rules can sometimes block the services required to run the firewall's own features. Command & Control

Create or verify a rule at the top of the firewall ruleset:

Default behavior (reasonable assumptions)

• Attempt 3 automated re-enable attempts over 10 minutes, then switch to fallback policy.
• Notify primary admin immediately and escalate after 30 minutes.
• Keep web access blocked for categories: Malware, Phishing, Command & Control, Adult.