1、檢查是否安裝 rp-pppoe 包
rpm -qa rp-pppoe
如果沒有安裝，則通過yum安裝
yum install -y rp-pppoe
2、服務端
（1）設置支持IP轉發
vi /etc/sysctl.conf
net.ipv4.ip_forward = 1 # 修改為1
（2）修改服務器配置
vi /etc/ppp/pppoe-server-options
# PPP options for the PPPoE server # LIC: GPL require-pap # 認證方式為pap, 還可以配置為chap方式 login lcp-echo-interval 10 lcp-echo-failure 2
（3）添加認證賬戶
添加系統賬戶
useradd test # 添加系統用戶test passwd test # 設置賬戶密碼, 這里設置密碼為 123
添加pppoe認證賬戶，認證賬戶必須為系統賬戶，這里使用剛添加的 test/123
# 若采用chap認證方式
vi /etc/ppp/chap-secrets
# Secrets for authentication using CHAP
# client server secret IP addresses
"test" * "123" *
# 若采用pap認證方式
vi /etc/ppp/pap-secrets
# Secrets for authentication using PAP
# client server secret IP addresses
"test" * "123" *
（4）修改配置文件 /etc/ppp/options
vi /etc/ppp/options
# local # local for chap auth # auth for pap lock # lock for pap
（5）啟動pppoe服務
pppoe-server -I eth1 -L 192.168.0.101 -R 192.168.0.200 -N 10
# -L 虛擬PPPoE接口
# -R 起始地址
# -N 地址個數
3、客戶端
（1）與服務端一樣，先安裝 rp-pppoe 包
（2）使用root用戶，執行 pppoe-setup
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... LOGIN NAME Enter your Login Name (default root): test # 輸入撥號認證賬戶 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): # 默認以 eth0 連接撥號 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): 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: PASSWORD Please enter your Password: # 輸入認證賬戶密碼 Please re-enter your Password: USERCTRL Please enter 'yes' (three letters, lower-case.) if you want to allow normal user to start or stop DSL connection (default yes): 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 Start this connection at boot time Do you want to start this connection at boot time? Please enter no or yes (default no):no ** Summary of what you entered ** Ethernet Interface: eth0 User name: test Activate-on-demand: No DNS: Do not adjust Firewalling: NONE User Control: yes Accept these settings and adjust configuration files (y/n)?y
輸入y之后，會提示 ifup ppp0 撥號
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.
撥號成功后，ppp0的ip為從服務端分配的地址。