使用 ssh -R 穿透局域网访问内部服务器主机，反向代理 无人值守化

一、搭建SSH反向代理

准备：

局域网主机(虚拟主机)： 192.168.6.233 CentOS 6.7

阿里云服务器：120.25.68.60 CentOS 6.7

 

1. 阿里云服务器120.25.68.60上需要修改sshd_config配置文件：

[root@120.25.68.60 ~]# vi /etc/ssh/sshd_config GatewayPorts yes [root@120.25.68.60 ~]# service sshd reload Reloading sshd: [ OK ] 2. 通过局域网虚拟机192.168.6.233连接到120.25.68.60开启反向端口代理，输入阿里云服务器密码.

root@192.168.6.233:~ # ssh -CqTfnN -R 0.0.0.0:7233:192.168.6.233:22 root@120.25.68.60 root@120.25.68.60\'s password:

 

3.在阿里云服务器120.25.68.60上可以看到这个监听.

[root@120.25.68.60 ~]# netstat -anp | grep7233 tcp 000.0.0.0:72330.0.0.0:* LISTEN 2392/sshd tcp 00 :::7233 :::* LISTEN 2392/sshd

 

4.现在到其他客户机上连接阿里云服务器120.25.68.60的7233端口,输入局域网虚拟主机192.168.6.233的主机密码.

[root@192.168.4.194 ~]# ssh -p 7233 root@120.25.68.60 root@120.25.68.60\'s password: Last login: Thu Mar 2411:01:152016 from 192.168.6.233 [root@phpdragon_233 ~]# ifconfig eth0 Link encap:Ethernet HWaddr 00:50:56:34:8B:4D inet addr:192.168.6.233 Bcast:192.168.6.255 Mask:255.255.255.0 inet6 addr: fe80::250:56ff:fe34:8b4d/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:1321125 errors:0 dropped:0 overruns:0 frame:0 TX packets:1232406 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:450626290 (429.7 MiB) TX bytes:273698355 (261.0 MiB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:524375 errors:0 dropped:0 overruns:0 frame:0 TX packets:524375 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:43705227 (41.6 MiB) TX bytes:43705227 (41.6 MiB)

 

到这里反向代理的测试完成，功能OK.

 

二、反向代理无人值守化 1.设置局域网主机192.168.6.233免密码登录到阿里云120.25.68.60. 

ssh-keygen -t rsa -P \'\'scp ~/.ssh/id_rsa.pub root@120.25.68.60:/tmp/id_rsa.pub_233 ssh -l root 120.25.68.60cat /tmp/id_rsa.pub_233 >> ~/.ssh/authorized_keys

 

2.阿里云服务器编写ssh代理关闭脚本kill_ssh_agent.sh

#!/bin/shif [ -n "$1" ] && [ "$1" -gt "0" ];then PID=$(netstat -anp | grep $1 | awk\'/sshd/ && !/awk/{print $7}\') PID=${PID%%/*} if [ -n "${PID}" ];then kill -9 $PID && exit 0 fi fi exit 1

 

3.客户端编写代理链接守护脚本ssh_agent_deamon.sh

######################################################################### # File Name: ssh_agent_deamon.sh # Author: phpdragon # mail: phpdragon@qq.com # Created Time: Thu 24 Mar 201601:55:49 PM CST ######################################################################### #!/bin/bash ROMOTE_USERNAME=root ROMOTE_SERVER_IP="120.25.68.60" ROMOTE_PORT=7233 ###[ /sbin/ifconfig|sed -n \'/inet addr/s/^[^:]*:([0-9.]{7,15}) .*/1/p\'|grep -v 127.0.0.1 ] LOCALHOST_IP=`/sbin/ifconfig -a|grep inet|grep -v 127.0.0.1|grep -v inet6|awk\'{print $2}\'|tr -d "addr:"` LOCALHOST_PORT=22whiletrue ; do PID=$(ssh -l root ${ROMOTE_SERVER_IP} netstat -anp | grep ${ROMOTE_PORT} | awk\'/sshd/ && !/awk/{print $7}\') PID=${PID%%/*} if [ -n "$PID" ] && [ "$PID" -gt "0" ];then sleep 30s else /usr/bin/ssh -l root ${ROMOTE_SERVER_IP} /bin/sh /data/kill_ssh_agent.sh ${ROMOTE_PORT} /usr/bin/ssh -CqTfnN -R 0.0.0.0:${ROMOTE_PORT}:${LOCALHOST_IP}:${LOCALHOST_PORT} ${ROMOTE_USERNAME}@${ROMOTE_SERVER_IP} fi done exit 0

 

4.设置ssh连接为长连接

vi /etc/ssh/sshd_config #每1分钟发送一个心跳信号给客户端 ClientAliveInterval 60 #最大超时次数,客户端不响应则关闭连接 ClientAliveCountMax 3

 

5.设置为随机启动

vi /etc/rc.local /bin/sh /data/ssh_agent_deamon.sh &

 

到此设置完毕。