See ACK Flood Attack
In an ACK flood attack, the attacker sends a large number of ACK packets to the target server through a botnet. As a result, the packets cause link congestion with an excessive load, or requests with changing source addresses or destination ports sent at extremely high rates cause an abnormality in the forwarding device and then lead to network breakdown, or processing capability of the target server is exhausted and the server fails to provide services normally.
Anti Distributed Denial of Service refers to protection against DDoS attacks.
A Challenge Collapsar (CC) attack is targeted at web servers or application programs by means of standard GET or POST requests used for obtaining information. If the requests involve Universal Resource Identifiers (URIs) of database operations or URIs consuming other system resources, server resources are exhausted and the target servers will be unable to respond normally.
A denial-of-service (DoS) attack (a flood attack) is an attempt to use up the network or system resources of a computer to temporarily interrupt or stop services on the computer, thereby causing users unable to access the services normally. A DDoS attack is one in which two or more compromised computers are used to attack a single target, thereby causing denial of service for users of the targeted computer.
In a slow HTTP attack, after managing to establish a connection with an HTTP server, the attacker specifies a large content-length and sends packets at very low rates, such as one byte per one to 10 seconds, and maintains the connection. If the client builds more such connections, available connections on the server will be exhausted bit by bit, causing the server unable to provide services.
See SYN Flood Attack
In a SYN flood attack, the malicious client (the attacker) uses forged SYN packets (the source addresses of which are fake or non-existent) to send connection requests to the target server. The target server acknowledges those requests by returning SYN-ACK. However, the client does not respond to the server with an expected ACK packet. As a result, the target server has a large number of half-open connections that last until timeout. Those connections exhaust server resources, causing the target server to fail to create normal TCP connections, as expected by the attacker.
In Transmission Control Protocol (TCP) attacks, attackers send forged TCP packets to target servers, with abnormal flag settings intended to make the servers unresponsive to normal user requests.
Traffic cleaning is a network security service used to precisely identify and discard abnormal traffic on a network to ensure passing of normal traffic. Traffic cleaning is mainly used to protect computers against DDoS attacks.
See UDP Flood Attack
In a User Datagram Protocol (UDP) flood attack, the attacker sends a large number of typically large UDP packets over a botnet at very high rates, thereby exhausting server resources and causing servers unresponsive to normal user requests.
Thank you for your score！Your feedback would help us improve the website.