Shulou(Shulou.com)06/03 Report--

Compared with other CDN service providers, the main advantages of CDN include stable and fast, cost-effective, easy to use, efficient and intelligent. More users will ask about the advantage of stability and speed. Generally speaking, CDN is characterized by sharing the pressure on the origin server, avoiding network congestion, accelerating the distribution of website content in different regions and different scenarios, and improving the speed of resource access. So what are the advantages of the high-defense server of CDN analogy? in fact, I think it still depends on your actual needs to choose, it is best to cooperate with the use of the effect is even better, now give you a brief introduction to the comparison of these two products.

In this era of the Internet, about DDOS attacks, I think it should be the most common thing for major Internet companies. DDOS attacks are very scary, which means "distributed denial of service" and is a malicious resource-taking behavior. Attackers use illegally controlled machines or attack software to send a large number of invalid requests to the server where the target website is located, so that the resources of the server are occupied so that the service requests of normal users can not be processed. The website opens slowly or stops the network service.

At present, there are two main ways to defend against DDoS attacks: one is to use high-defense servers, and the other is to use high-defense CDN. Why is the defense capability of high-defense CDN better than that of high-defense servers, and where is the protective effect of high-defense CDN better than high-defense servers?

First of all, understand what the defense mechanism of the high defense server is.

At present, the high defense server mainly protects against DDoS attacks by regularly scanning existing network nodes, configuring firewalls in backbone nodes, finding possible security loopholes, using enough machines to withstand hacker attacks, making full use of network equipment to protect network resources, and filtering unnecessary services and ports. However, the DDoS attack is directly hit on the source server. If the defense strategy is not in place, the attack will still lead to excessive bandwidth CPU memory utilization of the server, or even directly affect the origin server, resulting in problems such as jam, website failure and access.

High defense server is to do early and high defense solution, the defense principle of high defense server is hardware and software firewall plus bandwidth to resist attacks, the initial defense effect is very good, but with the development of the Internet, the attack mode is no longer monotonous, there are different attacks for different website programs, and the high defense server is still the same user a set of defense strategy to deal with a variety of different attacks. So the defense effect is naturally not good.

The high defense server adopts stand-alone defense or cluster defense, and the attack is directly hit on the source server. The attack may cause the bandwidth CPU memory utilization of the server to reach 100%, and may even directly affect the origin server, resulting in problems such as jam, website failure and inaccessibility.

High-defense cdn is more popular than high-defense server at present, the principle is simply to set up multiple high-defense CDN nodes, when there is a CDN node attack, all nodes bear. It will not lead to the inaccessibility of the website because a node is killed by an attack, but the price is relatively high because of the good effect.

High-defense cdn can be said to be a website high-defense scheme upgraded on the basis of high-defense server, but it is completely different from high-defense server and has more efficient defense capability.

First, the website server is hidden in the back end, and the high defense cdn node is deployed in the front end to ensure that the website server will not suffer targeted attacks.

Second, the high-defense cdn defense mechanism is not only single, there are different defense strategies for different website programs, then there is no need to worry about new attacks, you can immediately deploy targeted defense strategies according to the attack mode, efficiently intercept cleaning attacks, and minimize the impact of attacks on websites.

Third, high-defense cdn caching technology reduces the request for data between visitors and the website server, reduces the pressure of the website server, and improves the stability of the website server.

The network high defense CDN adopts multi-node distribution, which can solve the access speed of different network users in different regions, reduce the pressure on the website server, and hide the origin server ip, so that the attacker can not find the origin server ip and directly attack the source server, so that the attack can hit the CDN node. Each node of CDN is a stand-alone defense, and each node has a corresponding defense of package defense. Unless the attack exceeds the package defense, the website will not be affected and can provide security for customers' websites.

If there is anything else you don't understand, you can find our CDN technical engineer on the official website. CDN technical engineer has more than ten years of experience in the industry, so it will be more detailed and professional than the editor's answer. Official website link www.yisu.com

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