Sometimes the service itself is turned off manually or due to a configuration error.
This error typically occurs when Kerio Control determines that its connection to the (Zvelo) is unreliable, often due to DNS timeouts or expired authorization tokens . When the system fails to reach these servers ten times within a single minute, it automatically disables the Web Filter to prevent it from blocking legitimate traffic by mistake. 🛠️ Immediate Fix: Disable Reliability Detection Sometimes the service itself is turned off manually
: Categorization is handled by an external service (Zvelo). If your DNS settings (like using Google's DNS) interfere with reaching *.zvelo.com , the filter may fail. Cloudflare (1.1.1.1) as custom DNS forwarding servers GFI Support How to Re-enable the Web Filter Sometimes the service itself is turned off manually