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1.引言 本专题仅对当前出现的几种地址盗用情况进行研究,同时开发基于PC平台的简单专用网络管理软件。 2.防止盗用方式 由于目前上海交大校园网采用集中路由管理,各院系所分配的IP地址范围并没有严格意义上的区分,实际应用中不同网段的IP地址都是通过同一路由连接CERNET,并通过清华大学的国际出口与Internet相互连通。这样一台主机就可以使用其他院系的IP地址上网,并联往国外,从而将大量的网络费用转嫁到其他的院系。同时,如果盗用者非法使用IP地址上网,就会使使用该IP地址的合法用户被摒弃在网络以外,带来不必要的损失。这就要求网络中心一方面进行全校网络使用者IP及MAC地址的登记工作,另一方面为防止地址的盗用,还应该在网络中心设置网管监测,同时接收用户举报。
1. Introduction This topic only studies the current situation of several kinds of address misappropriation, and at the same time, develops a simple dedicated network management software based on the PC platform. 2. Prevent the theft mode As the current Shanghai Jiaotong University campus network using centralized routing management, the department assigned IP address range and there is no strict sense of distinction, the actual application of different network segment IP addresses are connected through the same route CERNET, And through the Tsinghua University’s international exports and Internet connectivity. Such a host can use the IP addresses of other faculties to connect to the Internet and in parallel to other countries, thereby transferring a large amount of network costs to other faculties. At the same time, if an unauthorized person uses an IP address to access the Internet, legitimate users using the IP address are abandoned outside the network, causing unnecessary losses. This requires the network center on the one hand the school network users IP and MAC address registration, on the other hand, to prevent the address of theft, but also in the network center set up network monitoring, while receiving user reports.