Kerio Control Web Filter Is Not Activated Categorization Is Disabled Hot Jun 2026

If the filter has disabled itself due to perceived unreliability (often triggered by DNS timeouts), you can force it back on using these SSH commands via the Kerio Control console Access the directory cd /opt/kerio/winroute Disable reliability detection ./tinydbclient "update SiteFilter set DetectReliability=0" Restart the service /etc/boxinit.d/60winroute restart Fix DNS and Authorization Issues

Erase localized firebase cache directories to free up system disk space. If you need help implementing these changes, let me know:

: Ensure your system time is accurate and synchronized with an NTP server, as mismatched times can cause license and certificate errors. GFI Support exact SSH commands

Kerio deactivates the filter if 10 consecutive DNS queries fail within one minute. Usually, it tries to re-enable itself after one hour, but a manual restart is often faster. 2. Resolve "Invalid Authorization" Failures

(208.67.222.222). Avoid using Google DNS (8.8.8.8) for Zvelo lookups as it can cause authorization failures support.keriocontrol.gfi.com Restart the System If the filter has disabled itself due to

Keep standard configuration backups so you can restore settings quickly if a system rollback is required.

I can provide the exact configuration scripts or commands tailored to your deployment. Share public link

By resolving upstream DNS latency and configuring direct routing rules for backend databases, your GFI KerioControl engine will continuously process web profiles without throwing categorization warnings or dropping client sessions.

Web Filter categorization disabled. Serial number: ko-197974 Usually, it tries to re-enable itself after one

If your error log specifically mentions "Invalid Authorization," it likely means the has expired (tokens typically last 21 days).

Use a reliable pool like pool.ntp.org or your local region's NTP server.

: Using certain DNS servers (like Google's) for all traffic can sometimes interfere with Zvelo's authorization tokens. in the admin interface. Custom DNS Forwarding *.zvelo.com Cloudflare (1.1.1.1) or (208.67.222.222). the Kerio Control appliance after making this change. Check Winroute Config : Ensure the DiaServerUrl is correctly set. /opt/kerio/winroute/winroute.cfg , verify that the value is v4.url.zvelo.com Activation Verification Navigate to Content Filter Applications and Web Categories Enable Kerio Control Web Filter is checked. Test a URL in the field to see if it provides a category. License Issues

Fixing Kerio Control Error: "Web Filter is Not Activated, Categorization is Disabled" Avoid using Google DNS (8

Web Filter categorization disabled. Serial number: ko-197974

: 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

When this error occurs, your network losing its primary line of defense against web threats. This comprehensive guide explains why this happens and provides step-by-step solutions to fix it. Why This Error Happens

: Kerio Control performs automatic reliability checks. If it fails to receive DNS responses 10 times in a row within one minute, it marks the Web Filter as "not reliable" and disables categorization.