Linux下怎么样拨号上网
Linux在去年可谓春风得意,现在风头依然很劲,人们逐渐发现在Windows之外还有更好的选择,Lin ux被寄予了厚望,希望有一天它把能够取代Windows,它的创始人Linus Torvalds也成为因特网时代 的英雄。作为天天面对Windows的电脑爱好者来说,对Windows是既爱又恨,因而怎能错过Linux呢?更何 况它是免费的午餐。
Linux是因特网时代的神话,在Linux系统中各种Internet的软件、工具应有尽有也就不足为奇了 。但是对大多数用户来说,通过Modem拨号上网是联结Internet的唯一途径,在此笔者以Redhat5.1为 例,详细介绍一种拨号上网的方法,希望Linux的新手能够尽快通过Linux去畅游Internet,体会Linu x强大的网络功能,获取更多Linux的知识。 先假设你的计算机已经安装好了Redhat5.1或者以上版本的Linux,并且Modem已经连接在计算机 上。 第一步:准备Modem 需要确定Modem在计算机的哪个串口上。最简单的办法是启动Windows95,在控制面板中察看Mode m的属性;在Linux下有一种简单的办法是:先确认Modem已经连接在计算机上,打开Modem电源,MR、HS 灯应该是亮的,然后在提示符下输入以下命令: echo AT>/dev/ttyS0 如果Modem的TR灯亮了,表明Modem连结在COM1口,否则,再试/dev/ttyS1、/dev/ ttyS2、/dev/ttyS3。 第二步:准备核心 版本2.0.34的Linux核心已经内置了PPP功能,在此需要确认一下Linux的版本,如果是Redh at5.1就可以跳过这一步,因为Redhat5.1的内核版本即是2.0.34。否则就可能需要重新编译Linux 内核以便支持PPP。 第三步:准备拨号脚本 在RedHat5.1中,已经在/usr/doc/ppp-2.3.3/scripts目录下为我们提供了拨 号脚本程序的样本,需要我们做的是把其拷贝到正确的目录并把其改为可执行文件,具体操作如下: cp/usr/doc/ ppp-2.3.3/scripts/ppp-on/usr/sbin cp/usr/doc/ ppp-2.3.3/scripts/ppp-off/usr/sbin cp/usr/doc/ ppp-2.3.3/scripts/ppp-on-dialer/etc/ppp cd/usr/sbin chmod+x ppp-on chmod+x ppp-off cd/etc/ppp chmod+x ppp-on-dialer 然后根据你的ISP做相应的少许改动。以下是笔者所用的两个脚本ppp-on和ppp-on-dialer的 内容: ppp-on的内容: #!/bin/sh # # Script to initiate a ppp connection. This is the first part of the # pair of scripts. This is not a secure pair of scr ipts as the codes # are visible with the'ps' command. However, it is simple. # # These are the parameters. Change as needed. TELEPHONE=96340# ISP提供的上网电话号码 ACCOUNT=yuangq#账号名称 PASSWORD=654321#登录密码,注意修改本文件权限以便保密:) LOCAL_IP=0.0.0.0#本地IP地址,0.0.0.0表示由ISP动态分配 REMOTE_IP=0.0.0.0#远端IP地址,一般为0.0.0.0 NETMASK=255.255.255.0#子网掩码地址 # # Export them so that they will be available at'ppp -on-dialer' time. export TELEPHONE ACCOUNT PASSWORD # # This is the location of the script which dials th e phone and logs # in. Please use the absolute file name as the$PATH variable is not # used on the connect option.(To do so on a'root' a ccount would be # a security hole so don't ask.) # DIALER_SCRIPT=/etc/ppp/ppp-on-dialer # # Initiate the connection # # I put most of the common options on this command. Please, don't # forget the'lock' option or some programs such as mgetty will not # work. The asyncmap and escape will permit the PPP link to work with # a telnet or rlogin connection. You are welcome to make any changes # as desired. Don't use the'defaultroute' option if you currently # have a default route to an ethernet gateway. # exec/usr/sbin/pppd debug lock modem crtscts/dev/tty S1115200 \ asyncmap20A0000 escape FF kdebug0$LOCAL_IP:$REMOTE_ IP \ noipdefault netmask$NETMASK defaultroute connect$DI ALER_SCRIPT& ppp-on-dialer的内容: #!/bin/sh # # This is part2 of the ppp-on script. It will perfo rm the connection # protocol for the desired connection. # exec chat-v \ TIMEOUT3 \ ABORT'\nBUSY\r' \ ABORT'\nNO ANSWER\r' \ ABORT'\nRINGING\r\n\r\nRINGING\r' \ '' \rAT \ 'OK-+++\c-OK' ATH0 \ TIMEOUT30 \ 上一篇: Linux的常用网络命令 下一篇: Linux下拨号网络配置 更多相关文章
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