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

Navigate directly to the software application directory by running: cd /opt/kerio/winroute Use code with caution.

Note: This forces the filter to stay active even if it has trouble reaching the update servers. Configuration Check

Ensure that your Kerio Control appliance is using stable, public DNS servers for forwarding.

Also test the license validation server:

Fix DNS forwarders or bypass internal DNS for Kerio's update domains. Navigate directly to the software application directory by

The most basic, yet frequently overlooked, cause for a disabled web filter is licensing. The Kerio Control Web Filter requires a specialized premium subscription module.

: If you use Google DNS (8.8.8.8), the filter might fail due to "Invalid Authorization" tokens. It is recommended to use Cloudflare (1.1.1.1) (208.67.222.222) for better compatibility with Zvelo. Verify Licensing

Kerio Control must communicate with external cloud servers to categorize websites and verify your subscription status. If your firewall cannot reach these servers, it disables categorization. Allow Outbound Ports

The Web Filter is a separate module within your Kerio Control license. Log into the . Navigate to Dashboard . Also test the license validation server: Fix DNS

If your internet connection works but fluctuates in latency, Kerio's built-in reliability checker can trigger false positives and disable filtering. Disabling this check forces the filter to stay active.

Kerio Control needs to communicate with the external categorization service to function.

Resolving this error requires a systematic approach. Start with the most common (licensing) and then move through each potential cause.

If the "hot" warning still glares at you from the dashboard, remember: The service wants to work. It is "hot" because it is trying desperately to reconnect. Your job is to remove the roadblock—be it a $50 expired subscription or a wrong DNS entry. Do not ignore this message; an offline web filter is an open door for productivity loss and cyber threats. : If you use Google DNS (8

Web Filter categorization disabled. Serial number: ko-197974

If your structural Software Maintenance evaluation has crossed its 30-day trial window, the active taxonomy engine instantly disables itself. Ensure subscription statuses show active, unexpired timelines. Verifying and Troubleshooting Content Filtering

Upstream ISPs often drop or throttle heavy volumes of short-lived TXT/DNS requests generated by real-time classification engines. Route zvelo-specific tracking requests away from local ISP infrastructure to high-availability alternative public resolvers. Log into your interface. Navigate to Configuration > DNS .