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首先安装好CentOS6以后要安装rp-pppoe这个软件，centos之前的版本所adsl-setup这个命令安装，到centos6改了。

需要光驱内放好CentOS安装盘

挂载光盘

#mount /dev/cdrom /media

找出文件路径

# find /media -name 'rp-pppoe*'

这个文件没有依赖项，可以直接安装

#rpm -ivh /media/CentOS_6.0_Final/Packages/rp-pppoe-3.10-8.el6.i686.rpm

安装好以后可以开始设置ADSL和DNS信息

#pppoe-setup

Welcome to the PPPoE client setup.  First, I will run some checks on

your system to make sure the PPPoE client is installed properly...The following DSL config was found on your system:  Device:      Name:  ppp0         DSLppp0Please enter the device if you want to configure the present DSL config(default ppp0) or enter 'n' if you want to create a new one: ppp0LOGIN NAMEEnter your Login Name (default root): 中国电信或者网通给你的ADSL用户名，注意电信给的有ad打头INTERFACEEnter the Ethernet interface connected to the PPPoE modemFor Solaris, this is likely to be something like /dev/hme0.For Linux, it will be ethX, where 'X' is a number.(default eth0): eth0← 指定网络接入设备，一块网卡的情况下，一般为默认eth0Do you want the link to come up on demand, or stay up continuously?If you want it to come up on demand, enter the idle time in secondsafter which the link should be dropped.  If you want the link tostay up permanently, enter 'no' (two letters, lower-case.)NOTE: Demand-activated links do not interact well with dynamic IPaddresses.  You may have some problems with demand-activated links.Enter the demand value (default no): ← 直接按回车，接受默认设置，询问的是，adsl连接以后，是否持续保持连接。或者是自动的断开，在指定的时间（以秒数计算）内。多数情况下，我们希望手动的打开关闭连接。所以这里选择默认的no。DNSPlease enter the IP address of your ISP's primary DNS server.If your ISP claims that 'the server will provide dynamic DNS addresses',enter 'server' (all lower-case) here.If you just press enter, I will assume you know what you aredoing and not modify your DNS setup.Enter the DNS information here: 202.96.209.5 第一个DNS建议手动设置，不然可能连不上Please enter the IP address of your ISP's secondary DNS server.If you just press enter, I will assume there is only one DNS server.Enter the secondary DNS server address here: 202.96.209.133 第二个DNS建议手动设置，不然可能连不上PASSWORDPlease enter your Password: 输入ADSL的连接密码Please re-enter your Password: ← 再次确认输入ADSL的连接密码USERCTRLPlease enter 'yes' (three letters, lower-case.) if you want to allownormal user to start or stop DSL connection (default yes): yes← 填入no，不允许一般用户控制PPPoE的连接FIREWALLINGPlease choose the firewall rules to use.  Note that these rules arevery basic.  You are strongly encouraged to use a more sophisticatedfirewall setup; however, these will provide basic security.  If youare running any servers on your machine, you must choose 'NONE' andset up firewalling yourself.  Otherwise, the firewall rules will denyaccess to all standard servers like Web, e-mail, ftp, etc.  If youare using SSH, the rules will block outgoing SSH connections whichallocate a privileged source port.The firewall choices are:0 - NONE: This script will not set any firewall rules.  You are responsible          for ensuring the security of your machine.  You are STRONGLY          recommended to use some kind of firewall rules.1 - STANDALONE: Appropriate for a basic stand-alone web-surfing workstation2 - MASQUERADE: Appropriate for a machine acting as an Internet gateway                for a LANChoose a type of firewall (0-2): 0← 输入0，不在这里使用防火墙Start this connection at boot timeDo you want to start this connection at boot time?Please enter no or yes (default no):yes← 填入yes，在系统启动时自动连接ADSL

Accept these settings and adjust configuration files (y/n)? y← 配置信息确认无误后，键入y同意设置

** Summary of what you entered **

Ethernet Interface:eth0

User name:

[root@localhost ~]# pppoe-start← 启动ADSL pppoe连接

[root@localhost ~]# pppoe-status 设置完成后我们看看adsl状态

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