网络攻击下端口安全保护建模仿真

Modeling and Simulation of Port Security Protection under Network Attack

在网络攻击下的网络系统环境发生变化时,无法确定干扰信道环境的因素,传统的网络攻击下端口安全保护建模中,缺少反映网络攻击时的干扰情况,导致网络攻击下端口安全保护建模准确性低、概率估计差的问题。提出基于干扰模型的网络攻击下端口中断概率估计模型,给出网络攻击下系统环境的干扰模型。依据上述干扰模型,对不同的信道环境进行干扰分析,并运算基站接收到的通知信号的信噪比,判断信噪比和既定门限值的关系,分析基站是否接收到通知信号。判断其它用户端口对基站的干扰和已知门限值的关系,确定是否中断对用户端口的服务。仿真结果表明,所提方法能够很好的完成对网络攻击下端口中断概率优化估计。

An interference model of＂ system environment under the network attack is established, and a port inter- rupt probability estimation model under the network attack is put forward based on the interference model. According to the interference model, the interference in different channels is analyzed, the signal - to - noise ratio （SNR） of the received signal at base station is calaulated, the relationship between the SNR and the given threshold is ob- tained, and it is used to judge whether the base station receives the signal. According to the relationship between the interference of other user port on the base station and the known threshold method, determine whether the service for the user port is interrupted. The simulation results show that the proposed method can complete port interrupt probability estimation under the network attack.