| Nowadays we are in the information age. Network is becoming more and more important in enterprises, enterprises are paying more attention to secure network, but the security problem of network is also more and more serious. The traditional static network security model and the single network security techniques could not meet the demands of enterprises and the simple dynamic network security model can't protect network of enterprise effectively when it is faced with kinds of modern intrusion techniques, so enterprises need an all-around network security protection model.This article analyses the network security situation of enterprises in china, simply introduces P2DR model and describes some useful security techniques and products in the network security field, including firewall, IDS, honey pot and social engineering. After that the article gives a new dynamic security model which is based on P2DR. The new model has four parts: security policy, security management, security techniques and security training. Security policy is the kernel of the model, which controls the other three parts; Management is a bridge of the policy and the technique; there are advanced security products in the technique part; it is very helpful to improve the performance of network security protection. Enterprise pays more attention to training employees to know network security.After detailed description of all parts in the model, the model will be used in large enterprises and this article introduces in terms of different angles of security policy, network structure and management. At the end, we can find out this new model can be used effectively in large enterprises and it can be a selection when large enterprises are eager to establish a secure network.This article just does some research on the model which is used in large enterprises and the implementation of this model in other kinds of enterprises will be further researched. |
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