%A NIM.: 19106050027 Muhamad Nashiruddin Zaki %O Pembimbing: Mandahadi Kusuma, M.Eng. %T ANALISIS DAN IMPLEMENTASI OPEN-SOURCE HOST INTRUSION DETECTION SYSTEM SECURITY (OSSEC) PADA SMK NEGERI 2 SUKOHARJO %X Computer networks, as systems of communication and information exchange, require effective security planning to prevent network security threats, such as Distributed Denial of Service (DDoS) attacks, port scanning, brute force attacks, malware, and so on. This study discusses the implementation of a computer security system in the form of an Intrusion Detection System (IDS) to protect computer networks from potential security attacks. OSSEC (Open Source Host-based Intrusion Detection System Security) is one of the IDS software used to detect attacks on network devices, log them, and notify administrators. A case study at SMK Negeri 2 Sukoharjo showed deficiencies in the network security system, motivating us to conduct a study entitled "Analysis and Implementation of Open Source Host Intrusion Detection System Security (OSSEC) at SMK Negeri 2 Sukoharjo." This study aims to evaluate the security of the school's network system against internal and external threats by implementing OSSEC as a network monitoring tool. The results of this study are that the OSSEC system can detect and record various types of attacks against connected computer devices and is capable of running active response to prevent attacks. %K IDS, OSSEC, Pengujian Penetrasi %D 2023 %I UIN SUNAN KALIJAGA YOGYAKARTA %L digilib63108