A content filter is a program designed to control what content is allowed to be displayed, especially to restrict access to certain Web materials.
The content filter determines what content will be available on a particular machine or network.
Website blocking according to domain, type of URL or content category.
Blocking by regular expressions.
Blocking of downloads according to the type of file.
Blocking applications that access the Internet.
Blocking by users and time slots.
Active Directory / OpenLDAP authentication.