两台ubuntu本本共享3G网络

aoskas · #1

3G：华为EC122 电信3G(包月还是又算时，又算流量的，有一边到限值，就1角钱一分钟了！抢人）
EC122 上网。

以下东西多为抄的。没有什么技术可言！写在这里只是备忘！引用了哥子们的东西。请原著者上来领谢！！本人真诚致谢！！

一：EC122升级到最新的版本
二：装EC122驱动
网上找来的：

硬件信息如下:
　　$ lsusb grep -i Huawei
Bus 003 Device 006: ID 12d1:1001 Huawei Technologies Co., Ltd. E620 USB Modem
$

　　这个3G网卡支撑国产电信天翼3G准则 CDMA2000 ，下载内核网速刚开始为40K/S，然后彪到了200K+/S (不是在做广告……)

笔者运用软件平台为 Debian5.02，系统细致参数为
　　$ cat /proc/version
Linux version 2.6.26-2-686 (Debian 2.6.26-19) ([email protected]) (gcc version 4.1.3 20080704 (prerelease) (Debian 4.1.2-25)) #1 SMP Wed Aug 19 06:06:52 UTC 2009
$

　　1. 安装驱动

插入3G网卡到USB接口后，GNU/Linux识别该硬件，自动将其挂载到 /media/ChinaTelecom 目录下

　$ pwd
/media/ChinaTelecom
$ ls -F
AutoRun.exe*　 autorun.inf*　 autorun.sh*　　　　 Linux/　 SysConfig.dat*
autorun.ico*　 autorun.ini*　 install_linux*　 setup/
$ ./install_linux

　　这样，驱动就安装好了……快吧

2. 配置拨号上网

笔者喜好用 wvdial 同时维护 “3G、连手机蓝牙、连手机USB” 3种拨号方式，所以下面推选用 wvdial 3G拨号及其配置流程

先推选配置流程 :
插入3G网卡到USB接口后，待其识别该硬件，运行
　　$ sudo wvdialconf
[sudo] passWord for c-aries:
Editing `/etc/wvdial.conf'.

Scanning your serial ports for a modem.

... (省略)

Found a modem on /dev/ttyUSB_utps_modem.
Modem configuration written to /etc/wvdial.conf.
ttyUSB_utps_modem<Info>: Speed 115200; init "ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0"
ttyUSB_utps_pcui<Info>: Speed 9600; init "ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0"
$
　这里默认配置已写入文件 /etc/wvdial.conf 如下
　　$ cat /etc/wvdial.conf
[Dialer Defaults]
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
Modem Type = Analog Modem
; Phone = <Target Phone Number>
ISDN = 0
; Username = <Your Login Name>
Init1 = ATZ
; Password = <Your Password>
Modem = /dev/ttyUSB_utps_modem
Baud = 115200

　　修改成
　　$ cat /etc/wvdial.conf
[Dialer 3G]
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
Modem Type = Analog Modem
Phone = #777
ISDN = 0
Username = [email protected]
Init1 = ATZ
Password = vnet.mobi
Modem = /dev/ttyUSB_utps_modem
Baud = 115200

　　拨号运行命令
　　$ sudo wvdial 3g
--> WvDial: Internet dialer version 1.60
--> Cannot get information for serial port.
--> Initializing modem.
--> Sending: ATZ
ATZ
OK
--> Sending: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
OK
--> Modem initialized.
--> Sending: ATDT#777
--> Waiting for carrier.
ATDT#777
CONNECT
--> Carrier detected.　 Waiting for prompt.
~[7f]}#@!}!}!} }5}"}&} } } } }#}%B#}%}%}&&qe8@F~
--> PPP negotiation detected.
--> Starting pppd at Sun Mar　 7 09:44:49 2010
--> Pid of pppd: 26853
--> Using interface ppp0
--> pppd: ≒s HPs
--> pppd: ≒s HPs
--> pppd: ≒s HPs
--> pppd: ≒s HPs
--> pppd: ≒s HPs
--> local　 IP address 113.113.169.226
--> pppd: ≒s HPs
--> remote IP address 10.10.88.48
--> pppd: ≒s HPs
--> primary　　 DNS address 202.96.128.86
--> pppd: ≒s HPs
--> secondary DNS address 220.192.32.103
--> pppd: ≒s HPs
3. 附赠-我的wvdial.conf
　　$ cat /etc/wvdial.conf

[Dialer usb]
Init1 = ATZ
Init2 = AT&FE0V1&C1S0=0
Init3 = AT+cgdcont=1,"IP","CMNET","",0,0
Password = 172
New PPPD = yes
Phone = *99***2#
Idle Seconds = 3000
Modem Type = USB Modem
Stupid Mode = 1
Baud = 460800
Auto DNS = 1
Dial Command = ATD
Ask Password = 0
ISDN = 0
Username = 172
FlowControl = NOFLOW
Modem = /dev/ttyACM0

[Dialer bt]
Init1 = ATZ
Init2 = AT&FE0V1&C1S0=0
Init3 = AT+cgdcont=1,"IP","CMNET","",0,0
Password = 172
New PPPD = yes
Phone = *99***2#
Idle Seconds = 3000
Modem Type = BlueTooth Modem
Stupid Mode = 1
Baud = 460800
Auto DNS = 1
Dial Command = ATD
Ask Password = 0
ISDN = 0
Username = 172
FlowControl = NOFLOW
Modem = /dev/rfcomm0

[Dialer 3G]
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
Modem Type = Analog Modem
Phone = #777
ISDN = 0
Username = [email protected]
Init1 = ATZ
Password = vnet.mobi
Modem = /dev/ttyUSB_utps_modem
Baud = 115200

三：主机转发！
装EC122的本本在NetworkManager点创建新的无线网
输入网名: aaaa
输入密码wep 40/128密码: xxxxx
这个就建好了。开通它
键入：ifconfig
ppp0:xxxxxxxxxxxxxxxxxxxxxxx
wlan0:10.42.43.1

下边是网上找来的：
设定一条NAT rule,加入到/etc/rc.local文件中.
iptables -F
iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -t nat -A POSTROUTING -s 10.42.43.0/24 -o ppp0 -j SNAT MASQUERADE

开启IP转发
修改/etc/sysctl.conf，取消这一行的注释：
net.ipv4.ip_forward= 1
然后使之立即生效
sudo sysctl -p

四：联网
另一台机就不用说了，
连接aaaa 输入密码就可以了。能上网！就是转发时，DNS有点慢。也许是我的本本都太老了点。二台都是迅驰的cup的！845和915平台的！