Shulou(Shulou.com)06/02 Report--

Today, I will talk to you about how virtual hosts defend against ddos attacks. Many people may not know much about it. In order to make you understand better, the editor has summarized the following for you. I hope you can get something according to this article.

DDoS means distributed denial of service, the purpose of denial of service attack is very clear, is to prevent legitimate users from accessing normal network resources, so as to achieve the purpose of the attacker. DDoS's attack strategy focuses on sending a large number of seemingly legitimate network packets to the victim hosts through many "zombie hosts" (hosts that have been invaded or indirectly exploited by attackers), resulting in network congestion or server resource exhaustion, resulting in a denial of service.

Once the distributed denial of service attack is implemented, the attack network packets will flood the victim host, thus flooding the network packets of legitimate users, resulting in legitimate users can not normally access the network resources of the server. Common DDoS attacks include SYN Flood, ACK Flood, UDP Flood, ICMP Flood, TCP Flood, Connections Flood, Script Flood, Proxy Flood and so on.

DDoS attacks initiate a large number of connections to visit your site, generating a large number of connections and traffic, resulting in high server load and insufficient bandwidth, but will not affect the site data. DDoS attack has a certain pertinence, at present, there is no good solution, only in the form of network disconnection so that the attack source can not find the target host.

Investigation suggestion

Check whether there are vulnerabilities in the website program and server data, and transfer the content of the site that may be attacked to avoid the same attack again.

Please observe whether it is a malicious attack from a competitor and conduct a comprehensive investigation to deal with it.

Precautionary measures

Program prevention: it is recommended to encrypt your program by zend, MD5 and other encryption methods in the program code to avoid vulnerabilities in the program that lead to Trojans being implanted into Trojans, and finally allow hackers to take advantage of this vulnerability to launch DDoS attacks.

Enhanced host security measures: it is recommended that you do not use the default remote port, and all passwords on the server should use complex passwords, such as remote password, FTP password, database password and so on. Simple passwords can be easily deciphered by hackers, and eventually customers' hosts are treated as broilers to launch DDoS attacks on other servers.

After reading the above, do you have any further understanding of how the virtual host can defend against ddos attacks? If you want to know more knowledge or related content, please follow the industry information channel, thank you for your support.

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