This tab shows the list of banned IP addresses for a site that is selected by the Site drop-down list. If you select (global), IPs that are banned globally for all sites will be displayed. New IPs can be added to the lists using the New banned IP link. You can edit () or delete () listed IP addresses.
More resources can be found at Developer's Guide -> Modules -> Banned IPs -> Overview.
Page url: http://devnet.kentico.com/docs/5_5r2/contexthelp/index.html?banip_list.htm