What is a high-defense CDN? Detailed explanation of core principles and protective functions

with the rapid development of digital business, websites and online systems are facing increasingly severe cyber attack threats. Large-traffic DDoS attacks, CC attacks, etc. may lead to business paralysis at any time, bringing immeasurable losses to enterprises. In order to deal with such threats, high-defense CDN, which integrates information delivery and protection capabilities, has gradually become the core choice of enterprise cyber security protection. This article will comprehensively interpret the core content of high-defense CDN from the definition, operation principle to actual protection value, and help enterprises and practitioners clearly understand the role of this protection tool.

What kind of network protection tool is CDN?

many people are familiar with the information delivery function of ordinary CDN, but the positioning of high-defense CDN is not clear.

1, the basic definition of high CDN

high-defense CDN is a network service that integrates the protection ability of large-traffic attacks on the basis of the information delivery function of ordinary CDN. It not only has the characteristics of ordinary CDN caching content nearby and accelerating user access, but also can identify and clean various large-traffic attacks through high-defense nodes deployed around the world to avoid attack traffic directly reaching the source server.

2, the core difference between high protection CDN and ordinary CDN

the core goal of ordinary CDN is to improve user access speed, only with the basic ability to intercept small traffic attacks; and high-defense CDN attack protection as one of the core functions, equipped with professional traffic cleaning equipment and intelligent attack identification system, can resist hundreds of G or even thousands of G large traffic DDoS attacks, while not affecting the normal user's access experience in the protection process.

What is the core operating principle of CDN?

high-defense CDN can achieve content acceleration and attack protection at the same time, the core lies in its unique node architecture and traffic processing mechanism, the following will disassemble the key links of its operation.

1, multi-node distributed traffic scheduling

high-defense CDN deploys a large number of high-defense nodes around the world. When a user initiates an access request, the system will intelligently dispatch to the node closest to the user, and at the same time introduce all traffic into the high-defense node for detection. This distributed architecture can not only realize content distribution nearby, but also disperse attack traffic to multiple nodes for processing, avoiding a single node from failure due to traffic overload.

2, intelligent traffic cleaning and attack identification

when the traffic enters the high-defense CDN node, the system will identify the normal traffic and attack traffic through multiple detection mechanisms. It will analyze the traffic characteristics, request frequency, source IP and other information based on preset rules and machine learning models, filter and clean the malicious attack traffic, and only forward the normal user access traffic to the source server to isolate the impact of the attack on the source station from the root cause.

3. What core protection functions can high-protection CDN achieve?

understand the protection role of high-defense CDN, is the core basis for enterprises to choose such services, it can form an effective defense against a variety of common network attacks.

1, protect against high-traffic DDoS attacks

DDoS attacks occupy source server resources by forging a large number of false requests, which is one of the main threats faced by enterprises. With massive node bandwidth and professional traffic cleaning system, high-defense CDN can undertake and clean hundreds of G of attack traffic, intercept malicious traffic at the node level, and ensure that the source server only receives normal user requests to maintain stable operation of the business.

2, blocking CC attacks and malicious crawlers

CC attack consumes server resources by simulating normal users to initiate high-frequency requests, and malicious crawlers will steal website content and data. High-protection CDN can intelligently distinguish normal users from malicious requests by identifying the behavioral characteristics, frequency and source of requests, and intercept CC attacks at speed limit. IP ban or request block for malicious crawlers to protect website resources and data security.

3, hidden source station real Internet Protocol Address

high-defense CDN will forward all user requests through the node, and users and attackers can only obtain the Internet Protocol Address of the high-defense CDN node, and cannot directly obtain the real IP of the source station. This function avoids attackers from directly targeting the source station from the root cause to launch targeted attacks, further enhancing the security of the business system.

What are the application scenarios of high-protection CDN?

not all businesses need high-protection CDN, and clarifying its application scenarios can help enterprises choose protection solutions more accurately.

1, e-commerce and financial business platform

e-commerce platform in the promotion period, the daily operation of the financial platform, is a high target of network attacks, once the attack may lead to transaction interruption, user data leakage. CDN can provide a stable large traffic protection for this kind of business, to ensure the continuous operation of the business, while improving the user's access speed and experience.

2, game and live online business

games and live broadcast services have extremely high requirements for network latency and stability, and are easy to become the target of DDoS attacks. High-defense CDN can not only achieve low-latency access through node distribution, but also resist large-traffic attacks in real time, avoid game cards, live broadcast interruptions and other issues, and provide users with a smooth experience.

To sum up, high-defense CDN is a comprehensive network service that integrates content acceleration and attack protection. It can effectively resist DDoS, CC and other network attacks through distributed node architecture and intelligent traffic cleaning mechanism, and at the same time hide the source station IP to improve business security. It is suitable for e-commerce, finance, games and other vulnerable online businesses, and is an important security tool for enterprises to ensure stable operation of business and improve user experience.