The final command in this process will restart the entire Kerio Control service, temporarily disrupting all internet traffic on your network. Therefore, you should only perform this procedure outside of business hours or during a scheduled maintenance window.
Log into your Kerio Control console using a tool like PuTTY . Navigate to the Directory: cd /opt/kerio/winroute Use code with caution. Copied to clipboard Run the Update Command: ./tinydbclient "update SiteFilter set DetectReliability=0" Use code with caution. Copied to clipboard Restart the Service: /etc/boxinit.d/60winroute restart Use code with caution. Copied to clipboard Secondary Fixes & Prevention
Ensure your Kerio Control is using reliable DNS servers (like 8.8.8.8 or 1.1.1.1) under Configuration > DNS . 3. Clear the Web Filter Cache The final command in this process will restart
Ensure is checked and click Apply .
Ensure your WAN interface has valid, working DNS servers (e.g., or ISP provided). Navigate to the Directory: cd /opt/kerio/winroute Use code
Now that we have explored the causes and symptoms of the issue, let's move on to the step-by-step guide to fix it:
nslookup updates.gfi.com curl -I https://download.kerio.com/control/categorization/latest.dat Copied to clipboard Secondary Fixes & Prevention Ensure
If it returns a category, the filter is active. If it says "Unable to categorize," the authorization issue persists. support.keriocontrol.gfi.com To help you further, could you let me know: of Kerio Control are you running? Do you see an " Invalid Authorization DNS response timeout " error in your Software Maintenance currently active?
Add a rule for *.zvelo.com to use Cloudflare ( 1.1.1.1 ) or OpenDNS ( 208.67.222.222 ).