A Distributed Denial of Service attack (DDoS) is a type of network attack in which an attacker attempts to overload a target server's bandwidth and system resources by sending a large number of false requests to it, thereby rendering the target server unable to function properly. In order to deal with this threat, DDoS high-defense IP services have emerged. This article will introduce the principle and working mechanism of DDoS high-defense IP.

　　1. Threat detection:

　　The first step of the high-defense DDoS IP service is to detect potential DDoS attack threats in network traffic. This is usually achieved by:

　　Traffic analysis: The high-defense IP system will monitor incoming traffic and analyze its characteristics, including traffic size, source IP address, destination port, etc. An unusually large number of traffic requests may indicate a potential attack.

　　Behavior analysis: The high-defense IP system can also analyze the behavior of traffic, such as request frequency, connection establishment method, etc. Abnormal behavior may indicate that a DDoS attack is underway.

　　Blacklist and whitelist: High-defense IP systems can use blacklists and whitelists to blacklist known attacker IP addresses and allow access by legitimate user IP addresses.

　　2. Traffic filtering and cleaning:

　　Once a potential attack is detected, the DDoS high-defense IP system will take measures to filter and clean malicious traffic to ensure that legitimate traffic can be delivered normally.

　　Diversion of attack traffic: The high-defense IP system can divert traffic from the target server to multiple cleaning centers to balance the load and mitigate attacks.

　　Traffic filtering: High-defense IP systems use various technologies, such as access control lists (ACLs), deep packet inspection (DPI), and firewall rules, to filter out malicious traffic in DDoS attacks.

　　Request verification: The high-defense IP system can require requests from clients to be verified to ensure that the requests are legitimate.

　　3. Load balancing:

　　Once the traffic is cleaned and filtered, the Anti-DDoS IP system will evenly distribute legitimate traffic to the target server to ensure that the server can handle the request normally.

　　4. Real-time monitoring and adaptive response:

　　The high-defense DDoS IP system not only detects and cleans traffic, but also continuously monitors network traffic and takes adaptive responses. If a new DDoS attack threat appears, the system will automatically adjust its filtering policy to deal with the new threat.

　　5. Reporting and logging:

　　High-defense IP systems usually generate reports and logs to record attack events and how they were handled. These logs can be used to analyze attacks, determine the type of attack, and take further security measures.

　　Generally speaking, the principle of DDoS high defense IP service is to protect the target server from DDoS attacks through traffic detection, filtering, cleaning and load balancing, as well as real-time monitoring and adaptive response. These services play a key role in protecting network security and ensuring business continuity, especially for online businesses and critical infrastructure.