Configure Kerio Control to send email alerts to the administrator when license expiration dates approach or when update failures occur.
Restart the Kerio engine or reboot the appliance to commit the change. 3. Verify System Time and NTP Synchronization
Troubleshooting "Kerio Control Web Filter is Not Activated, Categorization is Disabled" Configure Kerio Control to send email alerts to
The error indicates that your firewall cannot classify web pages, which often leads to intermittent internet dropouts or unblocked malicious content . This critical issue typically stems from unreliable DNS queries sent to Kerio update servers, expired Zvelo URL database tokens , or subscription synchronization errors.
: Go to Content Filter > Applications and Web Categories , uncheck Enable Kerio Control Web Filter , click Apply , wait a moment, re-check it, and click Apply again to force the system to clear its cache and try re-authorizing. Upstream ISPs often drop or throttle heavy volumes
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 .
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Connect to your firewall terminal using an SSH client (like PuTTY). Change directories to the core routing folder: cd /opt/kerio/winroute Use code with caution.