A Computer Based Test (CBT) Local Area Network (LAN) security center was developed using XAMPP (Cross-Platform Apache MariaDB PHP and Perl) integrated net-base application and JAVA object-oriented programming language, using a backend Oracle database (JBuilder and NetBeans) where the Media Access Control (MAC) address of the users will be saved and using hard to spoof measure that is correlated to location of LAN to prevent MAC address spoof. This security system is controlled through the network via the server and controls all clients that choose to use the resources like e-exam platform, e-library, etc. It also views the activities of the users in the network (surveillance system). The security system also keeps history/records of all detection sensor/ MAC address of users, to track any activities carried with the resources. The performance under test was found to be satisfactory, as all unauthorized users are blocked and appropriate warning messages are sent to the client's system by the server when the user attempts to login. This eliminates external users from gaining access to the examination platform.