Design And Implementation Of The Management System Of The Public Security Internal Network Security Monitoring System

At present, the network controlling and management systems have been widely applied in the whole nation for security purposes. Currently, a series of available monitoring systems have been developed by a number of commercial and organizational agencies, for solving the problem of"one machine, dual use". Here, we developed a simple preliminary LAN monitoring system, suitable for being applied in city-level governments to reduce costs.The first chapter is dealing with the current security situatuion of internal network of the security departments. We also give a brief introduction, describe the research background, and propose the major contents of the present study. In the second chapter, we introduce the knowledge of database and programming environmet in detail. In the third chapter, we analyze the customer requirements for security monitoring, and design the principal modules for the whole system. In the fourth chapter, we mainly present the implementation of the modules of the systems. Finally, in the last chapter, the test design and cases for the system are present.Our study achieved the following modules:1) Detecting and identifying the connection way for the computers being monitored, including MODEM, ASDL, pairs of network cards, and offline behaviors.2) Recording the information all kinds of illegal access to internet for the computer, including online time, duration time, computer's IP and MAC addresses and so on.3) Recording the detailed information on the illegal computer, including name, department, network connection ways (proxy or dial-up).4) Easy query of data sets for the purpose of security searching and checking.5) Saving and uploading the suspected alert data to the high-level security monitoring center; developing the platform of information sharing and publishing; realizing the submission of alert data using email system.Features of present network monitoring security system:1) The monitoring platform is built on the basis of server/browser (B/S) framework. On the server side, SQL Server 2000 and ACCESS database software are used. 2) The system design follows the object-oriented strategy, developed under the three-tier framework, therefore the class structure for each module can be clearly present. In the design of database, we graph the relationships among the data, which can be vividly understood. In the whole development process, we can effectively accelerate the programming and reduce the design mistakes.3) Our system extensively used the developing environment of Visual Studio 2005, which can easily make the system realized. By using .Net Framework 2.0 and VB.Net, the developing effectiveness is very high, and the system is stable.4) On the design of system testing, we not only used the traditional V- and X-type testing design, but also introduced an improved testing method. The entire testing is carried out by the combination of the black and white box units, to make the testing more efficient and flexible.