In recent years, there have been to studied to construct a new network infrastructure for accepting evolved network technology. There is a research of controlling the network by "Flow". Flow is used a combination of layers of L4 from L2, to identify the communication network traffic. High Performance Packet Processing Engine (HPPPE), that FUJITSU developed, is one of the next generation packet processing engine. This system can process data from low-layer up to high-layer according to the format of the data being used per service. HPPPE provides service functions as add-on. In Saga University, user authentication system for using network named Open gate has been developed and used widely from 2001. In this study, we have developed network user authentication gateway system like Open gate using "HPPPE". This system determines using the network and ending the network based on "Flow".