关键词: 关键词：办公网络, P2DR, 安全策略, VPN, 认证, 授权, 入侵检测

Abstract:

With the rapid development of Internet technology, office network has become an indispensable working platform of

daily management for governments, schools and enterprises. Because of the complexity of the procedure controlling and the

sensibility of the data, compared with the general public network, office network needs to be more secure and reliable. This

essay analyzes the main threatening sources and the attacking approaches of office network on the basis of structures,

functions and characteristics of office network. According to the requirements of P2DR network safety model, it separates the

security strategy into 3 layers, which is network layer, system layer and application layer. Besides, it also elaborates the

security principles and the approaches of each layer.
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Key words: Key words:office network, P2DR, security policy, VPN, authentication, authorization, IDS