Design of a distributed network address translation system architecture

Network Address Translation (NAT) is a widely used important technology to mitigate the shortage problem of IPv4 addresses in Internet nowadays. However, the performance bottleneck caused by NAT´s traditional client-server structure brings the problem of low reliability. In this paper, we proposed a novel Distributed Network Address Translation (DNAT) system. DNAT designs a cooperation mechanism of multiple NAT systems through three layers architecture to improve the network access ability and reliability. The main function unit in each layer enhances the performance of NAT system for large number of network access request. DNAT outperforms traditional NAT system in reliability and expansibility.