Enterprise Network Security

The extensive application of Internet indicates that we are now in a great new era of information. In order to compete with others to realize the goal of enlarging the production scale and getting more benefit, enterprises should have built their own network, which is called Intranet. The security of Intranet has become a key problem after the appearance of Intranet. In order to find a good way to solve the problem, we have to analyze and evaluate all kinds of network threats and attacks, then get the countermeasure and solution. In this paper, we will do something to find a solution for Intranet security.This paper is divided into five chapters, we can get its main ideas as follows:Chapter I : Introducing the summary of Internet and network information security, and its development at home and abroad.Chapter II :Discussing network frangibility and threats such as computer virus, hacker etc.Chapter III: Expounding main network security techniques including data Encryption, Authentication, Kerberos, Virtual Private Network (VPN), Access Control, Security Protocol and Intrusion Detection Systems and Antivirus technique etc.Chapter IV: Introducing network security strategy and protocol.Chapter V: First discussing the design of process and principle for Intranet security system, then designing a solution scheme of Intranet security for enterprises. In this scheme, All kinds of threats and attacks are taken into account. Then we will make full use of various network security techniques to deal with them.