The Program Design of Network Firewall Based on Windows

This thesis focuses on the design of the personal firewall and its realization under the operation system of Windows. Firstly, the paper presents the background of introducing of the personal firewall, the development of Domestic and foreign personal firewall, the security problem of network and the technology of computer firewall. Then, analyses thoroughly the technology of the capturing of network data under the operation system of Windows, and introduces overall frame about the operation system of Windows as well as structural drawing about the network system of Windows. Finally, the paper explains the design of the project and the implement of all the modules in detail, illuminates the testing and the analysis of performance of the program, and summarizes the entire paper. During the development, we adopt the software designing idea of structurization and modularization, which improves the transplantation and agility of the system. Three modules communicate each other, adopting the share memory technology, the message of Windows and the I/O controlling code.