关键词:内核模块;数据包;netfilterDesign and Development of Simple Internet Management and Controlling System under Linux
Abstract
With the permeation of Internet,the importance of Internet management and controlling becomes more prominent, It is related to the further development and permeation even the existence of Internet. To promote the development of Internet, it is possible to develop a mature Internet controlling system which can be managed and controlled under the current technical conditions. It can build a natural defense between internal and external network through managing and controlling the data of Internet. It is the core of this system that builds an overall Internet controlling agreement and realizes the model function of controlling and management. This system realizes the management and controlling of Internet data successfully by doing its design whose modules mainly based on the data controlling and filtering mechanism of Netfilter, under Linux. The modules have success in realizing the data managements. From practice, it concludes that data controlling mechanism of Netfilter can succeed in managing and filtering the whole data under Linux. This thesis introduces some basic concepts of MCS and edition environment of C language under Linux, firstly. Then it introduced realization of controlling module of Linux, Netfilter in Kernel, which highlight the structure of Netfilter in IPv4 and realization of Linux. Lastly it mentioned the strategy of MCS modules edition and how to design the function modules of MCS. So one simple modules of MCS of which doing dynamic insertion and suddenly unloading through controlling agreement sent by programs is designed successfully under Linux, following these skills. These modules also realize the management and controlling of ICMP data, HTTP websites and FTP Servers, respectively.