| In recent years, with the rapid development of China's E-government, the efficiency of the government and the level of information technology have been improved, which has brought great convenience to a vast number of citizens and the society. In the background of the continuous development of Internet technology, information security incidents occur frequently at home and abroad. Due to its characteristics of its importance and confidential, the E-government does not allow such accidents; otherwise it will cause great adverse effects to the society, and it may even be a threat to national security. In view of the present situation of E-government system network, this paper analyzes different kinds of threats and demands in many aspects of network security, combing with the popular security technologies, and put forward the feasible measures.This paper first introduces some popular security technologies and strategies, mainly on the data encryption, identity authentication, intrusion detection system, firewall etc. Then this paper further analyzes security requirements of E-government network and offers feasible solutions.Concerning the development of the Internet technology, e-government network is facing the threat of many types of network intrusions, thus this his paper designs a set of e-government network intrusion detection system based on protocol analysis and pattern matching, this system mainly consists of five parts, namely the data capture part, protocol analysis part, rules analysis part, rules matching part, etc.. The main innovation of this article are(1) in the data capture part, this paper analyzes the reasons why the data capture rate is low, and puts forward a design scheme based on NAPI and memory mapping technology, which significantly improves the data capture rate.(2) By means of the protocol analysis technology along with the fact that network protocols are very standard to filter packets, which reduce the complexity of rule matching algorithm significantly. |
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