What Are a SYN Flood Attack and an ACK Flood Attack?
A SYN flood attack is a typical denial of service (DoS) attack. Utilizing the loop hole in the Transmission Control Protocol (TCP), the attacker sends a huge number of forged TCP connection requests to the target to exhaust its resources (fully loaded CPU or insufficient memory). Consequently, the target fails to respond to normal connection requests.
An ACK flood attack works in a similar mechanism as a SYN flood attack.
An ACK flood attack is when an attacker attempts to overload a server with TCP ACK packets. Like other DDoS attacks, the goal of an ACK flood is to deny service to other users by slowing down or crashing the target using junk data. The targeted server has to process each ACK packet received, which uses so much computing power that it is unable to serve legitimate users.
About Anti-DDoS FAQs
- What Is Anti-DDoS?
- 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 Is the Million-level IP Address Blacklist Database?
- How Will Anti-DDoS Be Triggered to Scrub Traffic?
- Does Anti-DDoS Traffic Cleaning Affect Normal Services?
- How Does Anti-DDoS Scrub Traffic?
- What Are the Restrictions of Anti-DDoS?
- What Is the Protection Capacity of Anti-DDoS?
- What Data Can Be Provided by Anti-DDoS?
- In Which Regions Is Anti-DDoS Available?
- What Is the Maximum Protection Capacity Provided by HUAWEI CLOUD Anti-DDoS for Free?
- Which Services Can Use Anti-DDoS?
- Can Anti-DDoS Be Used Across Clouds?
- How to Determine Whether an Attack Occurs?
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