Linux与Linux之间的互拔

答案：
一．Linux与Linux之间的互拔： 
请看图一： 
我家里： 办公室： 
机器名：j128 机器名：vms68 
OS: RedHat5.1 OS: RedHat5.1 
IP: 192.168.88.128 <----电话网----> IP: 192.168.89.68 <---> 
Internet 
| [ttyS0] [ttyS1] [ttyS0] 
|网线 
| 
机器名：j003 
OS: Win98 
IP: 192.168.88.3 
第一步要配置Linux为ppp服务器，允许拔入，如姚飞所说： 
使用mgetty 
(以下假设modem装在ttyS0) 
cd /etc 
vi inittab 
add : 
d1:2345:respawn:/sbin/mgetty ttyS0 # COM1口允许拔入 
d2:2345:respawn:/sbin/mgetty ttyS1 # COM2口允许拔入 
then: init q # 重读配置文件/etc/inittab 
注意, 如果想拔号出去, pppd 使用的设备也必须是/dev/ttyS0或/dev/ttyS1, 
而不是/dev/modem, 要不然是拨不出去的. 
我这样做后，j128和vms68都可允许拔入，但还不是ppp server，还需要以下几步： 
在vms68里： 
adduser ppp #新加一个用户 
passwd ppp #为ppp起个密码 
在/home/ppp下建一个脚本ppplogin，内容如下： 
exec /usr/sbin/pppd 115200 modem asyncmap 0 proxyarp \ 
192.168.89.68:192.193.89.69 
##### LOCALIP:REMOTEIP 
vi /etc/passwd 
将这行ppp:xxxx:505:505:ppp acount:/home/ppp:/bin/bash 
改为ppp:xxxx:505:505:ppp acount:/home/ppp:/home/ppp/ppplogin 
在j128里： 
adduser ppp #新加一个用户 
passwd ppp #为ppp起个密码 
在/home/ppp下建一个脚本ppplogin，内容如下： 
exec /usr/sbin/pppd 115200 modem asyncmap 0 proxyarp \ 
0.0.0.0:0.0.0.0.0 ###等vms68分配ip地址 
vi /etc/passwd 
将这行ppp:xxxx:505:505:ppp acount:/home/ppp:/bin/bash 
改为ppp:xxxx:505:505:ppp acount:/home/ppp:/home/ppp/ppplogin 
下一步要配j128拔到vms68，这很简单， 
跟拔到Internet是一样的，文件ppp-onvms68如下： 
# Script to initiate a ppp connection. This is the first part of the 
# pair of scripts. This is not a secure pair of scripts as the codes 
# are visible with the ps command. However, it is 易做图. 
# 
# These are the parameters. Change as needed. 
TELEPHONE=xxxx # The telephone number for the connection 
ACCOUNT=ppp # The account name for logon (as in George Burns) 
PASSWORD=xxxx # The password for this account (and Gracie Allen) 
LOCAL_IP=0.0.0.0 # Local IP address if known. Dynamic = 0.0.0.0 
REMOTE_IP=0.0.0.0 # Remote IP address if desired. Normally 0.0.0.0 
NETMASK=255.255.255.0 # The proper netmask if needed 
# 
# Export them so that they will be available at ppp-on-dialer time. 
export TELEPHONE ACCOUNT PASSWORD 
# 
# This is the location of the script which dials the phone and logs 
# in. Please use the absolute file name as the $PATH variable is not 
# used on the connect option. (To do so on a root account would be 
# a security hole so dont ask.) 
# 
DIALER_SCRIPT=/home/ppp/ppp-on-dialer 
# 
# Initiate the connection 
# 
# I put most of the common options on this command. Please, dont 
# forget the lock option or some programs such as mgetty will not 
# work. The asyncmap and escape will permit the PPP link to work with 
# a telnet or rlogin connection. You are welcome to make any changes 
# as desired. Dont use the defaultroute option if you currently 
# have a default route to an ethernet gateway. 
# 
exec /usr/sbin/pppd /dev/ttyS0 115200 modem $LOCAL_IP:$REMOTE_IP \ 
defaultroute lock crtscts asyncmap 0 connect $DIALER_SCRIPT \ 
debug 
现在配vms68拔到j128，文件ppp-onj128如下: 
# Script to initiate a ppp connection. This is the first part of the 
# pair of scripts. This is not a secure pair of scripts as the codes 
# are visible with the ps command. However, it is 易做图. 
# 
# These are the parameters. Change as needed. 
TELEPHONE=xxxx # The telephone number for the connection 
ACCOUNT=ppp # The account name for logon (as in George Burns) 
PASSWORD=xxxx # The password for this account (and Gracie Allen) 
LOCAL_IP=192.168.89.68 # Local IP address if known. Dynamic = 0.0.0.0 
REMOTE_IP=192.168.89.69 # Remote IP address if desired. Normally 0.0.0.0 
NETMASK=255.255.255.0 # The proper netmask if needed 
# 
# Export them so that they will be available at ppp-on-dialer time. 
export TELEPHONE ACCOUNT PASSWORD 
# 
# This is the location of the script which dials the phone and logs 
# in. Please use the absolute file name as the $PATH variable is not 
# used on the connect option. (To do so on a root account would be 
# a security hole so dont ask.) 
# 
DIALER_SCRIPT=/home/ppp/ppp-on-dialer 
# 
# Initiate the connection 
# 
# I put most of the common options on this command. Please, dont 
# forget the lock option or some programs such as mgetty will not 
# work. The asyncmap and escape will permit the PPP link to work with 
# a telnet or rlogin connection. You are welcome to make any changes 
# as desired. Dont use the defaultroute option if you currently 
# have a default route to an ethernet gateway. 
# 
exec /usr/sbin/pppd /dev/ttyS1 115200 modem $LOCAL_IP:$REMOTE_IP \ 
lock crtscts asyncmap 0 connect $DIALER_SCRIPT \ 
debug 
这里要注意LOCAL_IP和REMOTE_IP要给值，还有的是在pppd里没有defaultroute。 
因为vms68还要拔上Internet，所以不要defaultroute。 
在j128上用ppp-onvms68拔上vms68，连通后telnet vms68，执行以下命令： 
nohup sleep 30;ppp-onj128 
然后在j128上断线，等待vms68拔入。拔通后，在j128上要执行以下命令： 
route add -net 192.168.89.0 gw 192.168.89.69 ppp0 
route add default gw 192.168.89.69 ppp0 
ipfwadm -F -a m -S 192.168.88.0/24 -D 0.0.0.0/0 
现在可再telnet vms68，在vms68上拔号上网，这样j003可通过j128，再通 
过vms68上网，我也不用付任何费用。 

二．Win98与Linux之间的互拔： 
请看图二： 
我家里： 办公室： 
机器名：j128 机器名：vms68 
OS: RedHat5.1 OS: RedHat5.1 
IP: 192.168.88.128 IP: 192.168.89.68 <---> 
Internet 
| [ttyS1] [ttyS0] 
|网线 | 
| | 
机器名：j003 | 
OS: Win98 --------------------------- 
IP: 192.168.88.3 电话网 
这里vms68要象第一步所说的，要配成允许拔入的ppp server。 
这里主要是win98的配置，首先象上Internet那样，在拔号网络里新建一个连接， 
要注意两点，一要设置连通后弹出终端窗口，二是最主要的，在“控制面板”里 
选“调制解调器”，选用来连线的modem，选“属性”按钮，选“连接”，再选 
“高级”按钮，再在“附加设置”里输入&C0S0=001。 
为什么要这样做？因为win98自带的ppp client会自动退出当远端ppp server挂线 
时，因此要骗一骗win98，要modem不要报告断线，并自动应答拔入。&C0就是要 
modem不要检测carrier，s0=001要modem在响一下后就应答。 
现在配vms68拔到j003，文件ppp-onj003如下: 
# Script to initiate a ppp connection. This is the first part of the 
# pair of scripts. This is not a secure pair of scripts as the codes 
# are visible with the ps command. However, it is 易做图. 
# 
# These are the parameters. Change as needed. 
TELEPHONE=xxxx # The telephone number for the connection 
#ACCOUNT=ppp # The account name for logon (as in George Burns) 
#PASSWORD=xxxx # The password for this account (and Gracie Allen) 
LOCAL_IP=192.168.89.68 # Local IP address if known. Dynamic = 0.0.0.0 
REMOTE_IP=192.168.89.69 # Remote IP address if desired. Normally 0.0.0.0 
NETMASK=255.255.255.0 # The proper netmask if needed 
# 
# Export them so that they will be available at ppp-on-dialer time. 
export TELEPHONE ###ACCOUNT PASSWORD 
# 
# This is the location of the script which dials the phone and logs 
# in. Please use the absolute file name as the $PATH variable is not 
# used on the connect option. (To do so on a root account would be 
# a security hole so dont ask.) 
# 
DIALER_SCRIPT=/home/ppp/ppp-on-dialer 
# 
# Initiate the connection 
# 
# I put most of the common options on this command. Please, dont 
# forget the lock option or some programs such as mgetty will not 
# work. The asyncmap and escape will permit the PPP link to work with 
# a telnet or rlogin connection. You are welcome to make any changes 
# as desired. Dont use the defaultroute option if you currently 
# have a default route to an ethernet gateway. 
# 
exec /usr/sbin/pppd /dev/ttyS1 115200 modem $LOCAL_IP:$REMOTE_IP \ 
lock crtscts asyncmap 0 connect $DIALER_SCRIPT \ 
debug 
这里要注意LOCAL_IP和REMOTE_IP要给值，还有的是在pppd里没有defaultroute。 
因为vms68还要拔上Internet，所以不要defaultroute。还有这里没有ACOUNT和 
PASSWORD，因为WIN98的PPP CLIENT不要用户名和密码，因此在PPP-ON-DIALER里 
要把送ACOUNT和PASSWORD的那两行去掉。 
J003通过拔号拔上VMS68后，要TELNET VMS68，在VMS68里执行以下脚本： 
kill `cat /var/run/ppp0.pid` ###注意如果是用ppp1，就用ppp1.pid 
nohup sleep 30;ppp-onj003 
这里要特别注意的一点是一定要在linux里断线，因为在WIN98里断线，则WIN98 
的PPP CLIENT就会退出，就不会应答呼叫。 
现在WIN98和LINUX之间就可以实现回拔了，但要注意WIN98的路由问题。 
在win98下要自配一下路由，在win98的目录里有route程序，它的格式如下： 
route print/add/delete/change (直接打route就有帮助看) 
象我的j003，在没有拔号时，用route print得到如下信息：(行号是我加上的) 
Active Routes: 
Network Address Netmask Gateway Address Inte易做图ce Metric 
1 0.0.0.0 0.0.0.0 192.168.88.128 192.168.88.3 1 
2 127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1 
3 192.168.88.0 255.255.255.0 192.168.88.3 192.168.88.3 1 
4 192.168.88.3 255.255.255.255 127.0.0.1 127.0.0.1 1 
5 192.168.88.255 255.255.255.255 192.168.88.3 192.168.88.3 1 
6 224.0.0.0 224.0.0.0 192.168.88.3 192.168.88.3 1 
7 255.255.255.255 255.255.255.255 192.168.88.3 0.0.0.0 1 
通过拔号网络拔入vms68后，用route print得到如下信息： 
Active Routes: 
Network Address Netmask Gateway Address Inte易做图ce Metric 
1* 0.0.0.0 0.0.0.0 192.168.89.69 192.168.89.69 1 
2* 0.0.0.0 0.0.0.0 192.168.88.128 192.168.88.3 2 
3 127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1 
4 192.168.88.0 255.255.255.0 192.168.88.3 192.168.88.3 2 
5 192.168.88.3 255.255.255.255 127.0.0.1 127.0.0.1 1 
6 192.168.88.255 255.255.255.255 192.168.88.3 192.168.88.3 1 
7 192.168.89.0 255.255.255.0 192.168.89.69 192.168.89.69 1 
8 192.168.89.69 255.255.255.255 127.0.0.1 127.0.0.1 1 
9 224.0.0.0 224.0.0.0 192.168.88.3 192.168.88.3 1 
10 224.0.0.0 224.0.0.0 192.168.89.69 192.168.89.69 1 
11 255.255.255.255 255.255.255.255 192.168.89.69 192.168.89.69 1 
注意我打＊号的地方，从WIN98拔号到LINUX，WIN98会自动配置路由，从LINUX拔号到WIN98? 
? 
WIN98就得手工配置路由，打＊号的就是要在LINUX拔号到WIN98时要手工加上的。 
现在TELNET上VMS68执行回拔脚本，连通后用route print得到如下信息： 
Active Routes: 
Network Address Netmask Gateway Address Inte易做图ce Metric 
1 0.0.0.0 0.0.0.0 192.168.88.128 192.168.88.3 1 
2 127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1 
3 192.168.88.0 255.255.255.0 192.168.88.3 192.168.88.3 1 
4 192.168.88.3 255.255.255.255 127.0.0.1 127.0.0.1 1 
5 192.168.88.255 255.255.255.255 192.168.88.3 192.168.88.3 1 
6 192.168.89.0 255.255.255.0 192.168.89.69 192.168.89.69 1 
7 192.168.89.69 255.255.255.255 127.0.0.1 127.0.0.1 1 
8 224.0.0.0 224.0.0.0 192.168.89.69 192.168.89.69 1 
9 224.0.0.0 224.0.0.0 192.168.88.3 192.168.88.3 1 
10 255.255.255.255 255.255.255.255 192.168.89.69 192.168.89.69 1 
现在可看到跟上面的不同了，要在WIN98的DOS窗口下执行以下批处理： 
route change 0.0.0.0 mask 0.0.0.0 192.168.88.128 metric 2 
route add 0.0.0.0 mask 0.0.0.0 192.168.89.69 
现在再用route print就会得到如下信息： 
. 
Active Routes: 
Network Address Netmask Gateway Address Inte易做图ce Metric 
1 0.0.0.0 0.0.0.0 192.168.89.69 192.168.89.69 1 
2 0.0.0.0 0.0.0.0 192.168.88.128 192.168.88.3 2 
3 127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1 
4 192.168.88.0 255.255.255.0 192.168.88.3 192.168.88.3 1 
5 192.168.88.3 255.255.255.255 127.0.0.1 127.0.0.1 1 
6 192.168.88.255 255.255.255.255 192.168.88.3 192.168.88.3 1 
7 192.168.89.0 255.255.255.0 192.168.89.69 192.168.89.69 1 
8 192.168.89.69 255.255.255.255 127.0.0.1 127.0.0.1 1 
9 224.0.0.0 224.0.0.0 192.168.88.3 192.168.88.3 1 
10 224.0.0.0 224.0.0.0 192.168.89.69 192.168.89.69 1 
11 255.255.255.255 255.255.255.255 192.168.89.69 192.168.89.69 1 
现在可TELNET上VMS68，在VMS68上拔号到INTERNET，现在J003可通过VMS68上网了。 
一些不足的地方： 
一．要手工的地方太多，不大方便，请朋友们再改良一下。 
二．只能用两个串口，我没有玩过多用户卡，请有经验的朋友指点一下在LINUX下用那种多用户卡最好，在那有卖，多少钱

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