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- What's New
- Function Overview
- Service Overview
- Getting Started
- User Guide
- Best Practices
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API Reference
- API Usage Guidelines
- Before You Start
- API Overview
- API Calling
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API
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Anti-DDoS Management
- Querying the List of Defense Statuses of EIPs
- Querying Optional Anti-DDoS Defense Policies
- Querying Weekly Defense Statistics
- Querying Configured Anti-DDoS Defense Policies
- Updating Anti-DDoS Defense Policies
- Querying the Traffic of a Specified EIP
- Querying Events of a Specified EIP
- Querying Configured Anti-DDoS Defense Policies
- Anti-DDoS Task Management
- Alarm configuration management
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Anti-DDoS Management
- Examples
- Appendix
- Out-of-Date APIs
- SDK Reference
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FAQs
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General FAQs
- What Are Regions and AZs?
- What Is the Black Hole Policy of HUAWEI CLOUD?
- What Are a SYN Flood Attack and an ACK Flood Attack?
- What Is a CC Attack?
- What Is a Slow HTTP Attack?
- What Are a UDP Attack and a TCP Attack?
- What Are the Differences Between DDoS Attacks and Challenge Collapsar Attacks?
- Does Anti-DDoS Provide SDKs and APIs?
- CNAD Basic (Anti-DDoS) FAQs
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General FAQs
- Videos
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What Is a DDoS Attack?
DoS attacks are also called flood attacks. They intend to exhaust the network or system resources on the target computer, causing service interruption or suspension. Consequently, legitimate users fail to access network services. A DDoS attack involves multiple compromised computers controlled by an attacker flooding the targeted server with superfluous requests. Table 1 describes the common DDoS attacks.
Attack Type |
Description |
Example |
---|---|---|
Network layer attack |
Occupies the network bandwidth with volumetric traffic, causing your service to be unable to respond to legitimate access requests. |
NTP flood attack |
Transport layer DDoS attack |
Occupies the connection resources of the server, resulting in denial of services. |
SYN flood, ACK flood, and ICMP flood attacks. |
Session layer attack |
Occupies SSL session resources of the server, resulting in denial of services. |
SSL slow connection attack |
Application layer attack |
Occupies the application processing resources of the server and consumes its processing performance, resulting in denial of services. |
HTTP GET flood attack and HTTP POST flood attack |
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