拒绝服务 Dos(Dos 是 Denial ofservice 的缩写,中文意思是拒绝服务)是一种非常简单的使攻击目标瘫痪的损人不利己的破坏攻击,一般都是利用 TCP/IP 协议的弱点或系统漏洞对目标系统发起大规模的进攻,导致攻击目标无法为合法的用户提供服务。从攻击角度看,目的就是另目标主机的网络连接速度减慢或完全瘫痪;而从被攻击者的角度看,当遭到攻击时,系统通常会出现一些异常现象:比如系统蓝屏、CPU 占用率100%等。由于目前还没有针对拒绝服务的有效解决方法, Denial of service Dos (Dos Denial of service abbreviation, the Chinese means denial of service) is a very simple harm to the attack target paralyzed destructive attacks, the general is to use the TCP / IP protocol vulnerabilities or system vulnerabilities to the target The system launched a large-scale attack, resulting in the target can not serve legitimate users. From an attack point of view, the purpose is to slow down or completely paralyze the network connection speed of the target host. From the attacker’s point of view, the system usually encounters some anomalies when it is attacked: for example, the system blue screen and the CPU usage 100% and so on. Since there is no effective solution to denial of service at present,