The Design And Implementation Of NAT In Giga-Bit Firewall Based On NP

With the rapid development of Internet and the sharp increase of network crime, Network Security issue has become very austere and received more and more attention. In this dissertation, I will introduce my research and development work related to Network Security during my graduate studying period.The dissertation is divided into two parts, one part is the Design and Implementation of NAT Subsystem in The Giga-bit Ffirewall based on NP, the other is the Design and Implementation of Control and Management Subsystem in WLAN Inspection Device. In each part, I will first introduce relative theory of the theme, then I will give out my design and realization scheme.The content is as followed:Chapter one introduces the characteristics and functions of Network Processor, mainly describes the architecture and IXA software framework of Intel IXP2400 Network Processor.Chapter two briefly introduces the concept,classification and key technologies of Firewall Technologies.Chapter three first introduces function design of The Giga-bit Packet Filter Firewall, then discusses module design and implementation of Firewall based on IXP2400.Chapter four describes the design, coding and testing of NAT Subsystem in detail.Chapter five introduces some technologies about WLAN and relative theories of Windows Sockets Network Programming,then focuses on the Design and Implementation of Control and Management Subsystem in WLAN Inspection Device.