DDoS attack is a kind of distributed denial of service attack that utilizes a large number of controlled computers or devices to launch massive requests or packets to the target server, which will make the target server unable to operate normally or crash.

Its goal is to exhaust the network system bandwidth,anti DDOS memory, CPU, and other resources of the target management server, preventing requests from legitimate users from being able to respond positively.

If you want to determine whether you have been subjected to a DDOS attack, you can compare it in several ways: 1.

1. Websites that cannot be accessed properly or are slow to access.

This may be because network bandwidth or server resources virtual Machine cloud are being used and normal access requests are not being processed.

2. Unusually high utilization of server resources such as CPU, memory, and network.

This may be due to the fact that the web server is responding to a large number of invalid requests or packets, resulting in resource overload.

3. A large number of abnormal access logs occur in the server logs.

This may be due to the attacker using a forged IP address or user agent to mask their true identity.

4. Some unusual traffic fluctuations in vpshosting network monitoring tools.

This is possible because attackers use reflection amplification and other techniques to increase attack traffic.

If we find ourselves under a DDoS attack, there are several measures we can take:

1. High-security servers.

High-security servers are specialized servers that can withstand high-intensity DDoS attacks. They usually have powerful hardware configurations and firewall devices that can filter out most of the malicious traffic.

2. CDN service.

CDN service refers to the distribution of website content to multiple nodes, allowing users to access the nearest node, improving the speed and stability of website access.CDN service can hide the real IP address of the website to prevent direct DDoS attacks, distribute traffic to all nodes, and reduce the pressure on the source station.

3.DDoS cleaning service.

DDoS cleaning service refers to real-time analysis and filtering of data in the network through professional software or hardware equipment to identify and remove abnormal traffic and ensure that normal traffic can reach the target server.

4. Adjust the server resource configuration and optimize the design of website code.

Adjusting server configuration can improve server performance and fault tolerance, such as increasing the length of the half-connection queue, enabling SYNCookie and so on. Optimizing website code can reduce unnecessary resource consumption and vulnerability risks, such as the use of caching, compression, authentication and other technologies.

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