Website security courses DDOS attack defense Raiders

a, why DDOS? With the continuous increase of />


is the abbreviation of Service, which means "distributed denial of service", then what is the denial of service (Denial of Service)? It can be understood that all can lead to legitimate users can not access the normal network service behavior is a denial of service attack. That is a denial of service attack is very clear, is to prevent legitimate users access to the normal cyber source, so as to achieve the purpose of the attacker not to be divulged. Although the same is a denial of service attack, but DDOS and DOS is different, DDOS attack strategy focused by many "bots" (by attackers invaded or indirect use of the host) to the victim host sends a large number of seemingly legitimate network packets, resulting in network congestion and server resource depletion and cause a denial of service. Distributed denial of service attack once implemented, attack network packets will be like a flood victim, thus the legitimate users of the network packet flooded, leading to the legitimate users can not access the server normal cyber source, therefore, denial of service attacks also called "flood attacks", common DDOS attacks SYN Flood ACK, Flood, UDP Flood, ICMP Flood, TCP Flood, Connections Flood, Script Flood, Proxy Flood; and DOS is focused on by Based on the attack host specific vulnerability leads to network stack failure, system crash, host crashes can not provide normal network service function, resulting in a denial of service attacks, common DOS TearDrop, Land, Jolt, IGMP Nuker, Boink, Smurf, Bonk, OOB etc.. The two kind of denial of service attacks, great harm is mainly DDOS attacks, because it is difficult to prevent, as for the DOS attack, through to the host server patch or install firewall software can be a good guard, after the paper will detail how to deal with DDOS attacks.

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