A Novel Solution based on NAT Traversal for High-speed Accessing the Campus Network from the Public Network

Bing Liu,Meng Liu,Meng Du,Jie Liu

doi:10.19026/rjaset.7.244

Abstract

Chinese universities use the multi-outgoing exports to solve the problem of the traffic of bandwidth to the Internet for the campus network, but the world wide web servers in the campus network might still be accessed very slowly by some users outside the campus network (from the public network). We discuss and analyze the reasons for slowly accessing to the campus network form the public networks and a novel solution for high-speed accessing to the campus network for the local client in public network is put forward. We first introduce an NAT (Network Address Translation) traversal approach based on reverse TCP (Transmission Control Protocol) connection, which has the advantage of not requiring any intermediary server. We test our NAT traversal approach in real network environment and the results show that it is effective. Meanwhile, we also test the network performance between the campus network and the local public network after the NAT Router between them has been traversed by our approach and the results show that the network performance by the second export accessing to the campus network is much better than by the campus network export.

Highlights

In early times Chinese university campus network accessed the Internet through the CERNET (Chinese Education and Research Network)
The access bandwidth of CERNET backbone to the Internet cannot follow the development of the whole CERNET, the access speed to the public network would be still so slow
The local client in the public network can be behind NAT box, but we only considered those local clients that have their own global IP address in this study

Summary

Introduction

In early times Chinese university campus network accessed the Internet through the CERNET (Chinese Education and Research Network). Some universities upgrade their links to the Internet. They increase a new 155 M fiber link or upgrade the link to 1 G. The access bandwidth of CERNET backbone to the Internet cannot follow the development of the whole CERNET, the access speed to the public network would be still so slow. Some universities increase the second or the third access link offered by the local ISP (Internet Service Provider), such as China Telecom or China Unicom, to the Internet. For distributing users’ accessing to the Internet, some universities all take the following policies:

Methods

Conclusion