Kerio Control does not rely solely on static blocklists. Instead, it uses . When a user requests a website, the Kerio appliance queries a remote categorization server (provided by Kerio’s parent company, GFI Software, or a third-party partner like McAfee). The server returns a category ID (e.g., 92 for “Gambling”). The appliance then applies your content rules.
This article explains why this message appears, the seven most common causes, and step-by-step solutions to restore full web filtering functionality. To understand the error, you must first know how Kerio Control’s web filter works. Kerio Control does not rely solely on static blocklists
However, administrators occasionally encounter a frustrating problem. Despite enabling web filtering, the system refuses to filter traffic. The dashboard or logs repeatedly state: The server returns a category ID (e
nslookup categorization.gfi.com Alternatively, use (depending on version): To understand the error, you must first know
