As mentioned, Kerio Control uses Zvelo's infrastructure. The communication is secured with an authorization token. These tokens have a limited lifespan and must be renewed periodically.
If the local database is corrupted, the service may start but categorization remains disabled.
: Often, simply restarting the Kerio Control engine or the entire appliance restores internet access and re-activates the filter. Check DNS Forwarders As mentioned, Kerio Control uses Zvelo's infrastructure
Kerio Control includes a cloud-based or locally cached URL categorization database. Unlike simple domain blacklists, the Web Filter evaluates the content category of a requested URL (e.g., facebook.com → "Social Networking"). Firewall rules can then allow or deny traffic based on these categories.
:Kerio Control disables the Web Filter if it fails 10 consecutive DNS checks within one minute. If the local database is corrupted, the service
Before diving into technical configurations, check the administrative console.
Through years of troubleshooting Kerio installations, these five culprits account for 99% of these errors: Unlike simple domain blacklists, the Web Filter evaluates
为了更好地防患于未然，建议您将以下融入到日常管理中：
Troubleshooting "Kerio Control Web Filter is Not Activated: Categorization is Disabled"
If stopped, start them manually. If they crash immediately, proceed to debug logs (Step 7).
