This filter consists of preconfigured categories and referer keywords. The referer categories contain lists of common websites that belong to the respective category.
E.g. Torrent Category contains Thepiratebay.org
Additional keywords that are part of the URL can be entered in the Keyword section. This can be a substring or a whole domain.
Invert Option: Is to invert the filter and only allow traffic from the listed categories / keywords. Use with caution!