Inspection deep packet (DPI) is a type of filter packets in a computer network is that the header section or the data packets in the network for the existence of the information is inappropriate based on the criteria predefined. If the pack allowed became known from the filter and passes otherwise, depending on the route, another sent, or to collect statistical data and review stored. IP packets from one part of the data, along with several headers have been formed. Network equipment is generally the first header need.