1.网络配置
#ifconfig eth0
ifconfig 命令显示信息说明：
Link encap 网络接口类型，如以太网或PPP等
HWadrr 网卡的 Mac 地址。每一块网卡都有自己的编号，用于在以太网协议下定位网络主机
inet addr 此接口对应的 IP 地址
网络接口状态标志 UP — 网络接口被启用
RUNNING — 接口正在运行
BROADCAST — 支持广播 IP 寻址方式
MULTICAST — 支持多播 IP 寻址方式
LOOPBACK — 表示本地回环设备接口
MTU Message transfer unit, 此接口所能传输的最大 frame 数
Metric 此接口的 Metric 数，用于引导路由决策
Bcast 广播地址，通常是网络的最后一个 IP 地址
Mask 子网掩码
RX packets 接收的封包总数、错误数、遗失数和溢流数
TX packets 发送的封包总数、错误数、遗失数和溢流数
collisions 冲突数（当多个 NIC 同时使用网线传输数据时会产生冲突）
txqueuelen 指出网络接口可以存储的数据包的个数
RX bytes 与 RX packets 类似，表示接收的具体字节数
TX bytes 与 TX packets 类似，表示发送的具体字节数
Interrupt 网卡使用的中断（IRQ）
Base address 网卡使用的内存地址
Welcome to the ADSL 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): ← 填入ADSL连接的用户名
INTERFACE
Enter the Ethernet interface connected to the ADSL 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): ← 指定网络接入设备，一块网卡的情况下，一般为默认eth0
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): ← 直接按回车，接受默认设置，断线后不自动拨号
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: ← 如果知道DNS服务器的信息在此填入。不知道的情况按回车跳过
PASSWORD
Please 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
USERCTRL
Please enter 'yes' (two letters, lower-case.) if you want to allow
normal user to start or stop DSL connection (default yes): no ← 填入no，不允许一般用户控制PPPoE的连接
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 ← 输入0，不在这里使用防火墙
Start this connection at boot time
Do 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
** Summary of what you entered **
Ethernet Interface: eth0
User name: caun870293@ca.dti.ne.jp
Activate-on-demand: No
DNS: Do not adjust
Firewalling: NONE
User Control: no
Accept these settings and adjust configuration files (y/n)? y ← 配置信息确认无误后，键入y同意设置否则，输入n重新输入。
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)
?
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/adsl-status /etc/sysconfig/network-scripts/ifcfg-ppp0'
to see the link status.
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