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

After purchasing the CDN service, users will be more concerned about the actual effect in the process of using it. First of all, make sure that it has been activated successfully, and then follow the basic steps to add accelerated domain names and configure CNAME. After all, you can test whether the CDN acceleration is successful. What are the respective advantages of cdn and high-defense servers in defending against DDOS attacks, and how should users choose?

For many Internet companies, DDOS attacks are not unfamiliar, and every enterprise that has been attacked by DDOS has lingering fears. Because DDOS attacks can not be solved completely, they can only be mitigated through defense. DDoS is an acronym for Distributed Denial of Service, and its translation into Chinese means distributed denial of service. Mainly through a large number of legitimate requests to occupy a lot of network resources, so that legitimate users can not get the response of the service, which is one of the most powerful and difficult to defend attacks. At present, there are two mainstream ways to defend against DDOS attacks: one is to use high-defense servers, and the other is to use high-defense CDN. Which is better? Let's talk about it in detail through many years of high defense experience.

High defense server

The high defense server adopts stand-alone defense or cluster defense, and the attack is directly hit on the source server. The high-defense server mainly protects against DDoS attacks by regularly scanning existing network nodes, configuring firewalls in backbone nodes, finding possible security vulnerabilities, using enough machines to withstand hacker attacks, making full use of network equipment to protect network resources, and filtering unnecessary services and ports. To really do a good job in high defense, it is obviously not enough to rely on hard defense alone. Strong computer rooms will make strategies on hard defense to deal with different kinds of attacks. If the defense strategy is not in place, the attack will still lead to excessive bandwidth, CPU and memory utilization of the server, which will directly affect the origin server and cause service interruption and other problems.

High defense CDN

The full name of CDN defense is Content Delivery Network Defense, that is, content diversion network traffic defense. The principle of high-defense CDN is to build a content distribution network on the network, relying on the edge servers deployed everywhere, through the load balancing, content distribution, scheduling and other functional modules of the central platform, so that users can get the content they need nearby without directly visiting the source server of the website. Its principle is simply to set up multiple high-defense CDN nodes, when there is a CDN node attack, all nodes bear. The site will not be inaccessible because a node is killed by an attack, and the source IP of the site can be hidden. Here is a key point: once you have connected to the high-defense CDN, do not disclose the IP address of the source server, otherwise an attacker can bypass the CDN and attack the source server directly.

The above is for you to introduce the principle of high defense server and high defense CDN defense DDOS attack. To put it simply, the high-defense server is a server with a defense system installed, while the high-defense CDN plays a defensive role by distributing technology to hide the real IP. Each of them has different advantages and disadvantages, so we can't directly say which defense ability is good. The enterprise chooses which defense method should also be chosen according to the actual attack on its website. Now the quality of network security service providers is uneven, many security service providers attract enterprises at very low prices, but there is a certain cost to defend DDOS, and it is definitely a problem if the price is too low. Therefore, when accessing high-defense services, enterprises must choose a professional security platform, not only see the price and cost, once not selected, it is likely to cause very bad and serious consequences to the enterprise.

If there is anything else you need to know, 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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