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Implementation of NAT-PT translation gateway based on netfilter framework

Wang Shuai

Abstract

Because of the coexistence of IPv4 and IPv6 networks,the communication between the networks of these two kinds is a problem must be solved during the transition from IPv4 to IPv6.The application of the NAT-PT translation gateway is one way to solve this problem.Firstly,the NAT-PT mechanism is researched,and the process of address-translation in the NAT-PT mechanism is discussed as a special focus.Then the Linux netfilter function framework is introduced.Finally,a modularized design of the NAT-PT translation gateway is brought forward,which is based on the netfilter function framework.This modularized NAT-PT translation gateway is easy to implement and have the further function expansion.

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Key concepts: Nat, IPv4, Computer science, Network address translation, IPv6, NAT traversal, Translation (biology), Gateway (web page)