linux redhat9.0/fedora4.0下adsl上網和配置全過程(轉)

linux redhat9.0/fedora4.0下adsl上網和配置全過程(轉)[@more@]現在有很多想學習linux的人, 就是因為不能配置上網,所以不想學習現在我從adsl配置到nat全過程如下:
1)安裝rp-pppoe-3.5-2包
在安裝系統時,對新使用者一般選擇全部安裝的,那就安裝了,以後rpm, 或者tarball了,這很方便,對初學者:
eg:
rpm -ivh rp-pppoe-3.5-2.rpm

tarball 安裝:
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
步驟:
a) adsl-setup
出現:
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:
//這是我已經安裝過了,主要是寫文件:選擇預設按回車

LOGIN NAME

Enter your Login Name (default lanlgn409ldj@zgcnc):
//這是我已經安裝過了,:沒有安裝是輸入adsl使用者名稱
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):
//選擇預設按回車
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):
//選擇預設按回車
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:
// 輸入server自動得到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):
//選擇預設按回車問你是否連線

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):
//是否設定firwall
Do you want to start this connection at boot time?
Please enter no or yes (default no):
//啟動時是否連線
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)?
//是否寫入配置檔案裡 選擇 y

3)假如你是用別人的mac連線
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)測試一下
ping
5)做nat
echo "1" > /proc/sys/net/ipv4/ip_forward //這很重要,路由轉發
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 ,
1一般網路卡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 兩塊網路卡nat:
只是那個 eth0:0 改成了 eth1 而已啦,其它都是一樣的設定
6)dns 設定
在裡面/etc/resolv.conf
把你的ip寫入裡面去
nameserver 192.168.0.1
然後重啟要不然,客戶機不能上網