Analysis and Realize of the NAT Network Scheme Based on Port Mapping

At present,information network is developing very fast,network address translation(NAT,Network Address T ranslation)in computer networks play a very important role.The application of NAT technology,can help slow available IP address space of the problem of insufficient.Aiming at a certain local area network connected to the case of internet,discusses the port mapping based on PAT technology currently used frequently,analyses that ISP distribution of public IP address pool and the router WAN port IP is not on the same segment of the case,the configuration mode of NAT.The internal network users through the PAT conversion for the public IP address,access to Internet.