The Security Research Of Linux System And The Design And Implement Of The New Type Of Sniffer

With the popularization of the internet, Linux system is widely used as network server, its security is concerned more and more.This thesis, firstly, studied the Linux system and some leaks of the applications running on it, discussed the ways how to defend the attacks to Linux servers, and introduced the security of Linux file systems.Secondly, it discussed how to set up a safe Linux system in the way of basic safety mechanism, data delivering encrypts, firewall and so on.Finally, it still analyzed Linux sniffer software. In view of the disadvantages of those software, I thought out a new-fashioned sniffer in terms of the actual requirements, and detailed made out its requirement analysis, summary designation and concrete realizations, then carried it out. At the same time, I also put forward the way to keep away from the sniff attack.In the end of this article, I pointed out some shortcomings and bugs in my designation and predicted the future of Linux network security.