在Linux下配置pppoe，一般有以下步骤：

1. 安装pppoe软件。这个不多说，ape-get install pppoe即可。

2. 设置拨号属性： [cpp] view plain copy root@ubuntu:~# pppoe-setup

详细过程如下：

用户名： [cpp] view plain copy USER NAME

>>> Enter your PPPoE user name (default test): test

接口(网卡)： [cpp] view plain copy INTERFACE

>>> Enter the Ethernet interface connected to the DSL modem

For Solaris, this is likely to be something like /dev/hme0.

For Linux, it will be ethn, where 'n' is a number.

(default eth0): eth0

dns： [cpp] view plain copy >>> Enter the DNS information here:

密码： [cpp] view plain copy PASSWORD

>>> Please enter your PPPoE password:

>>> Please re-enter your PPPoE password:

防火墙： [cpp] view plain copy 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 workstation

2 - MASQUERADE: Appropriate for a machine acting as an Internet gateway

for a LAN

>>> Choose a type of firewall (0-2): 0

保存设置： [cpp] view plain copy Ethernet Interface: eth0

User name:          test

Activate-on-demand: No

DNS:                Do not adjust

Firewalling:        NONE

>>> Accept these settings and adjust configuration files (y/n)? y

保存成功了。 [cpp] view plain copy Congratulations, it should be all set up!

Type 'pppoe-start' to bring up your PPPoE link and 'pppoe-stop' to bring

it down.  Type 'pppoe-status' to see the link status.

3. 开始拨号 [cpp] view plain copy root@ubuntu:~# pppoe-start

到了这一步，如果没有问题的话，应该就可以正常连上pppoe服务器了。

但在实际操作时，我遇到了以下两个问题：

问题1： [cpp] view plain copy root@ubuntu:~# pppoe-setup

Welcome to the Roaring Penguin PPPoE client setup.  First, I will run

some checks on your system to make sure the PPPoE client is installed

properly...

Oops, I can't execute the program '/usr/local/sbin/pppd'.  You

must install the PPP software suite, version 2.3.10 or later.

原因：目录/usr/local/sbin/没有pppd文件

解决方法：

将/usr/sbin/pppoe-setup脚本里PPPD=/usr/local/sbin/pppd

改为PPPD=/usr/sbin/pppd，保存修改后即恢复可正常

问题2： [cpp] view plain copy root@ubuntu:~# pppoe-status: Link is down (can't read pppoe PID file /var/run/pppoe.conf-pppoe.pid.pppoe)

尝试运行pppoe-connect，出现和问题一类似的错误

原因：同问题1所述

解决方法和问题1中类似：

将/usr/sbin/pppoe-connect脚本里PPPD=/usr/local/sbin/pppd

改为PPPD=/usr/sbin/pppd，保存修改后即恢复可正常

总结：

在配置pppoe时遇到奇怪的问题，很有可能是有相应的脚本的路径设置不当造成。