The Anycast Technology Application In The DNS System

With the development of Internet application technology,the combination of traditional business and the Internet is becoming more and more general,so a lot of new business such as IPTV,online shopping,Internet mobile phone,online games and e-mail emerge.The development of these businesses,on the one hand,greatly increases the Internet traffic,on the other hand,greatly enhances the dependence of the Internet users.DNS(Domain Name System),as an important support system of the Internet,is the foundation of Internet business applications and the important factor that influencing internet applications' operation.So Liaoning Unicom has been making deep research on the DNS construction,and the main goal is to improve the system performance,reliability and extendibility.Anycast technology is a flexible load-balancing technology.It not only can achieve load balancing in a node,but also can realize the user access according to the nearest region.The biggest feature is less investment for achieving load balancing.It is mainly applicable to all types of telecommunications-level ISP operators.F.root is just achieved by this way.In recent years,more and more Internet security incidents have proved that,because of the bottleneck of the new connection numbers,the four layer switchboard is not suitable for application in large-scale DNS network business.Based on the current situation in Liaoning Unicom DNS system,this paper will analyze the key technology of DNS security protection,including main security protection means,system deployment architecture analysis,etc.The paper will also deeply analyze the problems of network construction and other potential safety problems.And based on Anycast technology,from the three levels of DNS deployment architecture,DNS security,DNS security response process,the paper put forward the Liaoning Unicom DNS system distributed deployment plan.The plan will solve the performance bottleneck of 4-level layers technology in the old Liaoning Unicom DNS system,realize the nearest node access and load sharing,and also eliminate the single node fault in original network architecture.The optimized Liaoning Unicom DNS system has more flexible and reasonable network structure,increases system performance,safety and reliability,and improves the protection and control ability of the management system against attacks.