With the colossal development of PC organizations and the immense expansion in the number of utilizations that depend on it, network security is acquiring expanding significance. Additionally, practically all PC frameworks experience the ill effects of safety weaknesses which are both troublesome and monetarily exorbitant to be addressed by the makers. In this way, the job of Intrusion Detection Systems (IDSs), as unique reason gadgets to recognize irregularities and assaults in an organization, is turning out to be more significant. Cyber-attacks detection using intrusion detection system IDS along with WEKA simulation tool. In this paper, we represent the activities and detection of the malicious nodes with information to the system administrator. Various types of cyber-attacks occurring recently now. To safeguard the system from various assaults, an intrusion detection system allows for simple identification of potential threats.