Hackers can attack servers in various ways, and the attack on high defense servers may call more resources than ordinary servers, including data-driven attack, forged information attack, protocol vulnerability attack and resend attack. However, high defense server has higher defense performance and is not easy to be broken.
There are many ways for hackers to attack the server, and the attack on high defense server may call more resources than ordinary server. Let’s introduce some common attack ways.
Data driven attack
Data-driven attack refers to the attack launched when a hacker sends or copies a seemingly harmless special program to the target computer and is executed. The attack can allow hackers to modify files related to network security on the target computer, so that hackers are more likely to invade the target computer in the next time. Data driven attacks mainly include buffer overflow attack, format string attack, input verification attack, synchronization vulnerability attack, trust vulnerability attack, etc.
The attack of forgery information refers to that hackers construct a false report path between the source computer and the target computer by sending the forgery router information, so as to obtain the bank account password and other personal sensitive information in these packets.
Attack on protocol weakness
In LAN, the source path option of IP address allows IP packets to choose a path to the target computer by themselves. When the hacker tries to connect an unreachable computer x behind the firewall, he only needs to set the IP address source path option in the sent request message, so that a certain destination address of the message points to the firewall, but the final address points to the computer X.
当报文到达防火墙时被允许通过，因为它指向的是防火墙而不是计算机 X。防火墙的 IP 层处理该报文的源路径被改变，并发送到内部网上，报文就这样到达了不可到达的计算机 X，从而实现了针对信息协议弱点攻击。
Packets are allowed to pass when they reach the firewall, because it points to the firewall instead of computer X. The IP layer of the firewall processes that the source path of the message is changed and sent to the intranet, so that the message reaches the unreachable computer x, thus realizing the vulnerability attack against the information protocol.
重新发送攻击就是指黑客收集特定的 IP 数据包篡改其数据，然后再将这些 IP 数据包一一重新发送，从而欺骗接收数据的目标计算机，实现攻击，破坏服务器安全。
Resend attack means that hackers collect specific IP packets to tamper with their data, and then resend these IP packets one by one, so as to cheat the target computer receiving the data, realize the attack and destroy the security of the server.
However, compared with general servers, high defense servers have higher defense performance and are not easy to be broken.