Manage Request Filtering rules in Kentico's admin interface, to block unwanted requests immediately before Kentico processes them. Rules can be based on exact URL, regex pattern, IP, user agent or HTTP referrer.
Configure Request Filtering rules through a custom module, or app, in the Kentico admin interface. These rules are loaded into memory when the application starts, or whenever they are changed.
Every HTTP request is checked against your rules. If there’s a match, that request is blocked immediately. No database queries are executed and nothing is logged in Kentico - the application is blissfully unaware that the request was even made.
For more info see http://www.getstarted.com.au/Blog/March-2016/Kentico-Request-Filtering-Module
To install this module, 9.0 with at least hotfix 7 applied is necessary.