1.檢查自己的機器是否安裝了rp-pppoe
[root@hadoop1 Desktop]# rpm -qa rp-pppoe
rp-pppoe-3.8-5.fc10.i386
2.如果沒有安裝rp-pppoe,則安裝
[root@hadoop1 Downloads]# rpm -ivh rp-pppoe-3.8-5.fc10.i386.rpm
3.執行asdl-setup,如過沒有該命令，執行pppoe-setup
pppoe-setup: 設置撥號參數，使用一次就行了。
pppoe-connect: 在終端裏輸入用以撥號上網。
pppoe-stop: 很容易理解，這是用來斷開鏈接的。
[root@hadoop1 ~]# pppoe-setup
然後你會看到pppoe-setup會輸出如下的提示。
Welcome to the PPPoE client setup. First, I will run some checks on
your system to make sure the PPPoE client is installed properly...
現在它提示你輸入你在ISP所用的用戶名（也叫做帳號,比如我家就是座機號碼）。
LOGIN NAME
Enter your Login Name (default work): 051212345678
然後你會看到如下提示，這時他會提示你輸入使用連接的乙太網介面，不需要輸入任何內容，默認值即可。
INTERFACE
Enter the Ethernet interface connected to the PPPoE modem
For Solaris, this is likely to be something like /dev/hme0.
For Linux, it will be ethX, where 'X' is a number.
(default eth0):
現在系統要求詢問你是否希望在沒有聯網的情況下，系統是否在空閑一段時間後，自動切斷同網絡的連接。我不喜歡這樣，我希望在不用的時候，自己手動斷掉連接。於是選擇默認值，直接輸入回車。
Do 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 seconds
after which the link should be dropped. If you want the link to
stay up permanently, enter 'no' (two letters, lower-case.)
NOTE: Demand-activated links do not interact well with dynamic IP
addresses. You may have some problems with demand-activated links.
Enter the demand value (default no):
接下來，要求你輸入如何設置DNS參數，我選擇的是輸入：server。
DNS
Please 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 are
doing and not modify your DNS setup.
Enter the DNS information here: server
現在，要求你輸入對應於帳戶的密碼,系統會讓你輸入兩次密碼確認。
PASSWORD
Please enter your Password: xxxxxx
Please re-enter your Password: xxxxxx
對於下面的提問，你可以不予理會，使用系統的默認參數即可。
USERCTRL
Please enter 'yes' (three letters, lower-case.) if you want to allow
normal user to start or stop DSL connection (default yes):
下面要求你輸入防火牆的選擇，我選擇了沒有使用防火牆。
FIREWALLING
Please choose the firewall rules to use. Note that these rules are
very basic. You are strongly encouraged to use a more sophisticated
firewall setup; however, these will provide basic security. If you
are running any servers on your machine, you must choose 'NONE' and
set up firewalling yourself. Otherwise, the firewall rules will deny
access to all standard servers like Web, e-mail, ftp, etc.If you
are using SSH, the rules will block outgoing SSH connections which
allocate 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 workstation
2 - MASQUERADE: Appropriate for a machine acting as an Internet gateway
for a LAN
Choose a type of firewall (0-2): 0
現在它要求你確定是否在系統啟動時自動去撥號，一般來講，這是一種浪費，所以我們選擇輸入默認值，直接輸入回車即可。
Start this connection at boot time
Do you want to start this connection at boot time?
Please enter no or yes (default no):
現在，系統開始總結你設置的參數。要求你確認，此時，你可以輸入一個小y來確認。
** Summary of what you entered **
Ethernet Interface: eth0
User name: *sunzhou_110
Activate-on-demand: No
DNS addresses: Supplied by ISP's server
Firewalling: NONE
User Control: yes
Accept these settings and adjust configuration files (y/n)? y
Adjusting /etc/sysconfig/network-scripts/ifcfg-ppp0
Adjusting /etc/ppp/chap-secrets and /etc/ppp/pap-secrets
(But first backing it up to /etc/ppp/chap-secrets.bak)
(But first backing it up to /etc/ppp/pap-secrets.bak)
好了，當你看到這句話表明你的參數設置結束了。
Congratulations, it should be all set up!
Type '/sbin/ifup ppp0' to bring up your xDSL link and '/sbin/ifdown ppp0'
to bring it down.
Type '/sbin/pppoe-status /etc/sysconfig/network-scripts/ifcfg-ppp0'
to see the link status.
但是，此時你還無法聯網，你必須手動建立連接， 此時需要運行pppoe-connect命令。如果你看到了類似下面的輸出表明你可以上網了。
[root@cynicholas ~]# pppoe-connect
RTNETLINK answers: No such process
Using interface ppp0
Connect: ppp0 <--> /dev/pts/2
PAP authentication succeeded
local IP address 121.228.29.197
remote IP address 218.4.77.56
primary DNS address 61.177.7.1
secondary DNS address 221.228.255.1
此時你可以運行下面的命令，如果看到功能變數名稱被正確解析且有回應，則一切OK
[root@hadoop1 ~]# ping www.baidu.com
PING www.a.shifen.com (119.75.218.45) 56(84) bytes of data.
64 bytes from 119.75.218.45: icmp_req=1 ttl=56 time=29.6 ms
64 bytes from 119.75.218.45: icmp_req=2 ttl=56 time=30.2 ms
64 bytes from 119.75.218.45: icmp_req=3 ttl=56 time=29.3 ms
64 bytes from 119.75.218.45: icmp_req=4 ttl=56 time=29.3 ms
64 bytes from 119.75.218.45: icmp_req=5 ttl=56 time=30.0 ms
64 bytes from 119.75.218.45: icmp_req=6 ttl=56 time=28.7 ms
最後，如果需要斷掉連接，可以運行下面這個命令：
[root@cynicholas~]# pppoe-stop
Terminating on signal 15
Connect time 0.6 minutes.
Sent 2558 bytes, received 2166 bytes
cat: /var/run/pppoe-adsl.pid.start: No such file or directory
pppoe: read (asyncReadFromPPP): Session 5001: Input/output error
如果你看到了最後一行的錯誤報告，不予理會它。
如果輸入pppoe-connect,一直不停採用一下辦法解決
網絡鏈接-DSL-添加上面的賬戶和密碼，進行鏈接即可。
From:CSDN
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