Is Disabled Work — Kerio Control Web Filter Is Not Activated Categorization

: In many cases, Kerio Control will automatically attempt to revert to normal operation after if the connection is restored. SSH Fix (Manual Reset)

Kerio Control cannot resolve the Zvelo URL checking servers.

On the tab, verify that the predefined rule "Kerio Control Web Filter categories and applications" is enabled. Feature Comparison: Troubleshooting Steps Primary Fix DNS Timeout Error logs show "DNS response timeout" Use Cloudflare/OpenDNS for *.zvelo.com Invalid Auth "Invalid authorization" in logs Update to the latest version or reboot to refresh tokens Expired License Options are grayed out Renew GFI subscription : In many cases, Kerio Control will automatically

If expired, renew the license and click under Configuration > License . 2. Check DNS and Network Connectivity

A simple restart of the firewall often restores connectivity and resets the failure counters. Disable "Detect Reliability" (via SSH) Once you've resolved the problem

To prevent categorization from disabling unexpectedly in the future, implement these best practices:

| Preventive Measure | Why | |--------------------|-----| | Set up monitoring alerts | Receive email notification if categorization stops. | | Regularly check license expiry | Add a calendar reminder 30 days before renewal. | | Use redundant DNS servers | Prevents single-point-of-failure resolution issues. | | Document upstream proxy changes | Any proxy change requires updating Kerio. | | Test after updates | Category servers change IPs; test every quarter. | : In many cases

Kerio Control must have accurate time and reliable DNS to reach the update servers.

Once you've resolved the problem, following these best practices can help prevent it from recurring:

Before fixing the issue, it is important to understand what "Categorization Disabled" actually means.