曹诗敏 王娟
摘要:特殊网络是指与传统的客户端/服务端结构不同或者使用了特殊技术或工具形成的网络,前者以P2P网络为代表,后者以匿名网络、僵尸网络等为代表。这类网络相较传统网络更加高效、隐蔽、目的性强,难以用传统方法进行监管,带来了一系列管理和安全问题。传统流量识别技术不能有效应对特殊网络的流量识别,针对特殊网络的流量识别成为网络管理及网络安全领域新的热点。本文首先简要介绍传统网络的流量识别技术;进而介绍三种常见的特殊网络以及对应的流量识别技术,其中重点介绍目前Internet中最成功的公共匿名通信网络,即Tor网络的流量识别进展及存在问题。
关键词:特殊网络;流量识别;P2P网络;僵尸网络;匿名网络;Tor
中图分类号:TP391 文献标识码:A 文章编号:1009-3044(2018)17-0022-05
Abstract: The special network is different from the traditional client/server structure, with which formed by using the special technologies or tools, the former is represented by the P2P network, the latter is represented by anonymous network and botnet. Compared with traditional network, the special network is more efficient, covert and purposeful, and it is difficult to analysis with traditional methods, resulting in a series of management and security problems. The traditional traffic identification technology cannot effectively deal with the traffic identification of special network, and the traffic identification of special network becomes a new hot spot in network management and network security fields. Firstly, this paper introduced the traffic identification technology of traditional network, then three common special network, and the corresponding traffic identification technology were introduced, which focused on the most successful public anonymous communication network of Internet, namely the progress and existing problems of Tor network traffic identification.
Key words: the special network; traffic identification; P2P network; Botnet; anonymous network; Tor
1 引言
網络流量分析是有助于维护网络持续、高效和安全运行的一种手段,它广泛应用于网络管理中的安全监控和服务质量的改善[1],常见的产品如入侵检测系统(Intrusion Detection System:IDS)、防火墙、流量控制设备、负载均衡设备等也都和流量分析技术直接相关。对网络流量的分析可以很好地了解网络的运行规律,同时分析网络应用产生的流量以了解应用的运行情况。其次,流量分析还是了解网络用户的网络行为的重要途径,每个网络用户的网络行为都是相互影响的,同时会对网络的运行产生影响,用户在网络中的每个网络行为都伴随着网络流量的产生,通过对用户的网络流量的分析能够直观地了解用户的网络行为。……