Study of Based on UDP Protocol to Traverse NAT Under P2P Network Environment

With the IPV4 address gradually being exhausted,Internet instead of u sing NAT technology to solve the problem of IP address shortage,At the same time to the P2P network traffic with great difficulties.NAT traversal for P2P netwo rk problems,First,This paper analyzes the impact of NAT to P2P network traffic and proposed several methods of NAT traversal.Second,the use of UDP protocol U DP hole technology allows the UDP hole to achieve the P2P network traverse NAT. Finally,an example of a UDP hole technology workflow.The results confirm that UDP punching technology is applied to P2P network,which can ensure the security and the robust of network as well.