Network 版 (精华区)

发信人: first (匆匆), 信区: Network
标  题: 使用代理服务器提高访问速度
发信站: 紫 丁 香 (Wed Sep 23 16:41:52 1998), 转信



                                           使用代理服务器提高访问速度

                    　　Proxy Server (代理服务器)是 Internet 链路级网关所提供的一种重要的安
                    全功能，它的工作主要在开放系统互联 (OSI) 模型的对话层，主要的功能有：

                    　　1.连接 Internet 与 Intranet 充当 FireWall (防火墙)：因为所有内部网
                    的用户通过代理服务器访问外界时，只映射为一个 IP 地址，所以外界不能直接
                    访问到内部网；同时可以设置 IP 地址过滤，限制内部网对外部的访问权限;

                    　　2.节省 IP 开销：如前面所讲，所有用户对外只占用一个 IP，所以不必租用
                    过多的 IP 地址，以降低网络的维护成本。当然也有它不利的一面，如许多网络
                    黑客通过这种方法隐藏自己的真实 IP 地址，而逃过监视;

                    　　3.提高访问速度：通常代理服务器都设置一个较大的硬盘缓冲区(可能高达几
                    个GB)，当有外界的信息通过时，同时也将其保存到缓冲区中，当其他用户再访问
                    相同的信息时，则直接由缓冲区中取出信息，传给用户，以提高访问速度；另
                    外，由于许多代理服务器(正是下面所介绍的)多连接到有足够带宽的网络中，所
                    以通过它寻找目标，比你自己找要快许多;

                    　　鉴于国内个别 ISP 对一些网点有 IP 地址审查, 使大家不能访问一些站点,
                    而以往都是通过设置 Proxy 服务器来访问, 多为台湾站点, 访问速度慢、并且台
                    湾地区对美国的一些公司来讲, 同样是有种种限制(如 Micro$oft 的 128bits
                    IE, 只允许美国/加拿大 Download), 这里向大家介绍一个不用设置 Proxy , 同
                    样可以实现以上功能的美国站点(现只支持 http 协议):
                    http://www.anonymizer.com/surf_free.html , 试过如何?

                    　　下面同时提供几个高速 Proxy 服务器给大家, 当你用它访问欧洲、日本、澳
                    洲等非美国站点时, 比台湾的那些几十倍. 对国内不同地区, 使用每种的效果不
                    同, 可试验几次, 找到适合自己的, 但别忘了告诉我使用效果如何? 给你认为满
                    意的 Proxy Site 投一票。当然也有个缺点 --- 我不知道你是谁了.

                    　　另外提醒大家，Proxy 并不一定是为了使你找到受限访问的站点，如果能够
                    找到合适的 Proxy Site，同样能够提高你平时的访问/下载速度。

                    服务器设置
                    说明
                                 Proxy 设置
                                                              http
                                                                    ftp
                                                                         gopher
                                                                                 wais
                                                                                        自动设置文
                                                                                        件
                    有
                    (Fastest)
                                 access.adobe.com
                                                              8080
                                                                    8080
                                                                         8080
                                                                                 8080
                                                                                        　
                    有
                                 cache.ann-arbor.cic.net
                                                              3128
                                                                    3128
                                                                         3128
                                                                                 unknow
                                                                                        有
                                                                                        (Netscape)
                    有
                                 wwwproxy.cs.umd.edu
                                                              8080
                                                                    8080
                                                                         8080
                                                                                 8080
                                                                                        　
                    有 (Fast)
                                 proxy.pacificcoast.net
                                                              3128
                                                                    3128
                                                                         unknow
                                                                                 unknow
                                                                                        　
                    有
                                 www-proxy.cis.yale.edu
                                 ftp-proxy.cis.yale.edu
                                 gopher-proxy.cis.yale.edu
                                 wais-proxy.cis.yale.edu
                                                              8080
                                                                    8080
                                                                         8080
                                                                                 8080
                                                                                        　
                    有
                                 proxy.line.net
                                                              3128
                                                                    3128
                                                                         3128
                                                                                 unknow
                                                                                        　
                    有
                                 proxy.imar.net
                                                              3128
                                                                    3128
                                                                         3128
                                                                                 unknow
                                                                                        　
                    有
                                 proxy.macau.ctm.net
                                                              8080
                                                                    8080
                                                                         8080
                                                                                 unknow
                                                                                        　


                    　　国内 Proxy: (仅对个别用户可以提高速度, 且非公开应用)

                    服务器设置说
                    明
                                   Proxy 设置
                                                             http
                                                                   ftp
                                                                        gopher
                                                                                wais
                                                                                        自动设置文
                                                                                        件
                    无
                                   gatekpr.dq.cnpc.com.cn
                                                             8080
                                                                   8080
                                                                        unknow
                                                                                unknow
                                                                                        无
                    无
                                   proxy.szptt.net.cn
                                                             8080
                                                                   8080
                                                                        8080
                                                                                unknow
                                                                                        无



                                                   

                                                         
  

  

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