分布式代理服务器的实现

研究了在Internet上使用分布式代理服务器进行网络管理的方案 在此方案中 ,对用户身份采用分布式验证 在每一部门设立一个代理服务器 ,所有本部门的用户信息存放在该部门的代理服务器的用户数据库中 这样一方面克服了以往网络中心对用户认证采用集中式管理引起的网络中心负荷过重的缺点 ;另一方面增强了系统的安全性并有利于系统的扩充 另外 ,网络管理部门对Internet用户使用网络资源的权限能够进行动态限制 ,不仅可以控制用户的上网时间 ,还可以灵活的控制用户访问的字节数 此外 ,对用户使用网络资源的情况可以按访问时间或流量分别进行计费

The Implementation of Distributed Proxy Servers

Distributed proxy servers are applied in the management of network on Internet. In the scheme, the network managing department ascertains the identity of users through distributed authentication, and a proxy server is built in every department ,and all local users information is stored in the database of the proxy server in the local department .Therefore, on the one hand ,they can overcome the disadvantage of overloading of the network center caused by the centralized management of the network users ; on the other hand,system security is strengthened and the expansion of the system becomes easy. Besides, the network managing department can dynamically limit the privilege of users, and control not only access time,but also access bytes. Finally, the network managing department can also charge users according to access time or access flow.