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. Can CDN prevent attacks.

Can cdn defend against attacks? The website can defend against certain attacks by using cdn. After binding the website domain name to the server ip in the cdn background, it will automatically generate a resolution record value, and then resolve the website domain name to this record value.

Because the website domain name is not resolved to the server ip, the website server ip will not be exposed on the public network, and hackers will not be able to know what the ip address of the website server is, so they will not be able to attack the server.

The principle of protecting website server from attack by cdn

1. To use CDN, you need to bind the website domain name and the website server IP in the backend configuration. After the configuration is bound, a cname record value will be automatically generated. Modify the website domain name resolution, and resolve the website domain name to the specified cname record value. Because the website domain name is not resolved to the website server IP, others cannot know what the website server IP is.

2. CDN nodes are deployed in various regions. After using CDN, visitors can access the website when they visit the CDN node. Intelligent dns automatically allocates nodes for visitors to connect to the node with the fastest response, solving the problems of network bottlenecks, congestion and delays that affect access speed due to cross-region and cross-operator.

Third, the content of the website is distributed to the nodes where the CDN is deployed in each region, and the caching technology caches all the cacheable content on the node. Visitors do not need to request data from the website server when they visit the website. When there is no content on the CDN node, they will request data from the website server, reducing a lot of access pressure on the website server.

4. After using CDN, the website server is hidden in the backend, and the attacker cannot attack the website server, but can only attack the nodes deployed at the front end. When the attack traffic is detected, it will be automatically intercepted and cleaned, and the targeted defense strategy can be carried out according to different website program attack methods to defend against attacks more effectively, even in the case of attack, it will not affect website access.

The above is about cdn anti-attack introduction, the website's virtual host can enjoy Baidu's massive CDN node resources for free, rich node resources, covering the world, unlimited traffic to provide users with acceleration services.

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