The Design And Implementation Solution That IPV4Cdn Resources Are Forwarded Through IPV6Network

IPv6network addressing is considered as the next IP network address plan. Compared with IPv4network addressing, IPv6offers more IP addresses and makes improvements on safety and end-to-end communication. The next IP network will enter a transitional era of IPv4and IPv6will exist together. During this period, the problem how the IPv6end-user will visit the IPv4services and resources can not be ignored.Nowadays, major Internet Content Providers deploy content delivery network to decrease the retransmission of the redundant data and relieve the heave load of the original servers and make significant improvements on end-users visiting speed. The major Internet services such as video on demand, online games and searching all use CDN solution to optimize their service quality. Currently, the operators of content delivery network mostly deploy their intranet on IPv4network. Meanwhile, the Internet services mentioned above do not provide IPv6accessing for IPv6single stack end users. Under the circumstances, the IPv6users will be stopped from accessing the services and resources in IPv4network. This problem is very likely to leading to bandwidth wasting of IPv6network due to not so-many services using IPv6. Therefore Internet Content Providers are not willing to move their services to IPv6, which is not such a good phenomenon for IPv6deployment.By using open source software Open VPN, this system deployed a tunnel service on IPv6networks. OpenVPN client software leads IPv4traffic of the client to its virtual network interface card and forwards it through IPv6network. This is system is deployed on CERNET2network and is open to all IPv6users, proving its feasibility and robustness.Forwarding IPv4network traffic in IPv4-in-IPv6tunnel with OpenVPN and redirecting the customer traffic to access IPv4web services with NAT64, this thesis combines OpenVPN and NAT64to provide a solution to forward IPv4CDN resource with IPv6and complete the engineering implementations deploying the servers on CERNET2’s IPv6network. And this project has proved an important practical value for pushing IPv4’s transition to IPv6deployment.