PPPoE即：Point to Point Protocol over Ethnet
首先在终端中输入：sudo pppoeconf
检测以太网卡，如果检测到则会看到一下内容：
┌─────────┤ ALL DEVICES FOUND? ├────────┐
│ │
│ I found 1 ethernet device: │
│ eth1 │
│ │
│ Are all your ethernet interfaces listed above? │
│ (If No, modconf will be started so you can load the card │
│ drivers manually). │
│ │
│ Or press ESC to abort here. │
│ │
│ │
│ │
│ │
└─────────────────────────────┘
Yes回车
┌───────────┤ OKAY TO MODIFY ├─────────────┐
│ │
│ If you continue with this program, the configuration file │
│ /etc/ppp/peers/dsl-provider will be modified. Please make sure │
│ that you have a backup copy before saying Yes. │
│ │
│ Continue with configuration? │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
└──────────────────────────────────┘
Yes 回车：
┌─────────────┤ POPULAR OPTIONS ├─────-─────┐
│ │
│ Most people using popular dialup providers prefer the options │
│ 'noauth' and 'defaultroute' in their configuration and remove the │
│ 'nodetach' option. Should I check your configuration file and │
│ change these settings where neccessary? │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
└──────────────────────────────────┘
Yes回车：
┌─────────┤ ENTER USERNAME ├──────────┐
│ Please enter the username which you usually need for the │
│ PPP login to your provider in the input box below. If │
│ you wish to see the help screen, delete the username and │
│ press OK. │
│ │
│ username________________________________________________ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
└─────────────────────────────┘
删除username,然后输入服务提供商(电信或者其它)给你的用户名，回车：
┌──────────┤ ENTER PASSWORD ├─────────┐
│ Please enter the password which you usually need for the │
│ PPP login to your provider in the input box below. │
│ │
│ NOTE: you can see the password in plain text while │
│ typing. │
│ │
│ ________________________________________________________ │
│ │
│ │
│ │
│ │
│ │
│ │
└────────────────────--────────┘
然后输入服务提供商(电信或者其它)给你的密码，回车：
┌─────────┤ USE PEER DNS ├───────────┐
│ │
│ You need at least one DNS IP address to resolve the │
│ normal host names. Normally your provider sends you │
│ addresses of useable servers when the connection is │
│ established. Would you like to add these addresses │
│ automatically to the list of nameservers in your local │
│ /etc/resolv.conf file? (recommended) │
│ │
│ │
│ │
│ │
│ │
│ │
└─────────────────────────────┘
服务提供商将DNS ip 地址发送给我们，写入/etc/resolv.conf文件
Yes 回车：
┌────────────┤ LIMITED MSS PROBLEM ├──-───────┐
│ │
│ Many providers have routers that do not support TCP packets with a │
│ MSS higher than 1460. Usually, outgoing packets have this MSS when │
│ they go through one real Ethernet link with the default MTU size │
│ (1500). Unfortunately, if you are forwarding packets from other │
│ hosts (i.e. doing masquerading) the MSS may be increased depending │
│ on the packet size and the route to the client hosts, so your │
│ client machines won't be able to connect to some sites. There is a │
│ solution: the maximum MSS can be limited by pppoe. You can find │
│ more details about this issue in the pppoe documentation. │
│ │
│ Should pppoe clamp MSS at 1452 bytes? │
│ │
│ If unsure, say yes. │
│ │
│ (If you still get problems described above, try psetting to 1412 in│
│ the dsl-provider file.) │
│ │
│ │
│ │
└──────────────────────────────────┘
Yes 回车：
┌───────────────┤ DONE ├─────────┐
│ │
│ Your PPPD is configured now. Would you like to start the │
│ connection at boot time? │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
└─────────────────────────────┘
配置成功，询问是否启动时自动连接网络，Yes回车：
┌─────────┤ ESTABLISH A CONNECTION ├──────┐
│ │
│ Now, you can make a DSL connection with "pon │
│ dsl-provider" and terminate it with "poff". Would you │
│ like to start the connection now? │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
└─────────────────────────────┘
开始连接Yes回车：
┌──────────┤ CONNECTION INITIATED ├──────┐
│ │
│ The DSL connection has been triggered. You can use the │
│ "plog" command to see the status or "ifconfig ppp0" for │
│ general interface info. │
│ │
│ │
│ │
│ │
└─────────────────────────────┘
连接成功，我们可以利用plog或ifconfig ppp0命令查看网络状态。
总结：
配置PPPoE命令：sudo pppoeconf 一般在第一次或者修改了用户名密码时使用
启动PPPoE的命令： pon dsl-provider
关闭网络的命令：poff
查看网络状态的命令：plog或ifconfig ppp0
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