linux redhat9.0/fedora4.0下adsl上网和配置全过程-红联Linux系统门户

现在有很多想学习linux的人, 就是因为不能配置上网,所以不想学习现在我从adsl配置到nat全过程如下:
1)安装rp-pppoe-3.5-2包
在安装系统时,对新用户一般选择全部安装的,那就安装了,以后rpm, 或者tarball了,这很方便,对初学者:
eg:
rpm -ivh rp-pppoe-3.5-2.rpm

tarball 安装:
tar zxvf rp-pppoe-3.5-2.tar.gz
cd rp-pppoe-3.5-2
./configure
make
make install

2)rp-pppoe-3.5-2配置
步骤:
a) adsl-setup
出现:
Welcome to the ADSL client setup. First, I will run some checks on
your system to make sure the PPPoE client is installed properly...

The following DSL config was found on your system:

Device: Name:
ppp0

Please enter the device if you want to configure the present DSL config
(default ppp0) or enter 'n' if you want to create a new one:
//这是我已经安装过了,主要是写文档:选择默认按回车

LOGIN NAME

Enter your Login Name (default lanlgn409ldj@zgcnc):
//这是我已经安装过了,:没有安装是输入adsl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):
//选择默认按回车
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):
//选择默认按回车
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:
// 输入server自动得到dns,server的ip
PASSWORD

Please enter your Password:

USERCTRL

Please enter 'yes' (two letters, lower-case.) if you want to allow
normal user to start or stop DSL connection (default yes):
//选择默认按回车问你是否连接

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):
//是否设置firwall
Do you want to start this connection at boot time?
Please enter no or yes (default no):
//启动时是否连接
Do you want to start this connection at boot time?
Please enter no or yes (default no):

** Summary of what you entered **

Ethernet Interface: eth0
User name: lanlgn409ldj@zgcnc
Activate-on-demand: No
DNS: Do not adjust
Firewalling: NONE
User Control: yes
Accept these settings and adjust configuration files (y/n)?
//是否写入配置文件里选择 y

3)假如你是用别人的mac连接
1 redhat9.0改mac:
ifconfig eth0 down
ifconfig eth0 hw ether 5254ab323d51
ifconfig eth0 up
ifup ppp0

2 fedora 4.0改mac:
ifdown eth0
ifconfig eth0 hw ether 5254ab323d51
ifup eth0
ifup ppp0 & adsl-start
4)测试一下
ping www.baidu.com
5)做nat
echo "1" > /proc/sys/net/ipv4/ip_forward //这很重要,路由转发
modprobe ip_tables
modprobe ip_nat_ftp
modprobe ip_nat_irc
modprobe ip_conntrack
modprobe ip_conntrack_ftp
modprobe ip_conntrack_irc
/sbin/iptables -F
/sbin/iptables -X
/sbin/iptables -Z
/sbin/iptables -F -t nat
/sbin/iptables -X -t nat
/sbin/iptables -Z -t nat
/sbin/iptables -P INPUT ACCEPT
/sbin/iptables -P OUTPUT ACCEPT
/sbin/iptables -P FORWARD ACCEPT
/sbin/iptables -t nat -P PREROUTING ACCEPT
/sbin/iptables -t nat -P POSTROUTING ACCEPT
/sbin/iptables -t nat -P OUTPUT ACCEPT
/sbin/iptables -t nat -A POSTROUTING -o ppp0 -s 192.168.0.0/24 -j MASQUERADE//不是adsl也可以把ppp0改成eth0 ,
1一般网卡nat:
[root@test root]# vi /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
BOOTPROTO=dhcp
BROADCAST=192.168.0.255
IPADDR=192.168.0.1
NETMASK=255.255.255.0
NETWORK=192.168.0.0
ONBOOT=yes

[root@test root]# vi /etc/sysconfig/network-scripts/ifcfg-eth0:0
DEVICE=eth0:0
BOOTPROTO=static
BROADCAST=192.168..255
IPADDR=192.168.1.2
NETMASK=255.255.255.0
NETWORK=192.168..0
ONBOOT=yes
2 两块网卡nat:
只是那? eth0:0 改成了 eth1 而已啦,其它都是一样的设置
6)dns 设置
在里面/etc/resolv.conf
把你的ip写入里面去
nameserver 192.168.0.1
然后重启要不然,客户机不能上网

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linux redhat9.0/fedora4.0下adsl上网和配置全过程

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