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

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Runinglee 2018-02-12 18:03:47

文章标签 ssh转发 文章分类 运维

一、搭建SSH方向代理准备：

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

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 ]

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 | grep 7233 tcp 0 0 0.0.0.0:7233 0.0.0.0:* LISTEN 2392/sshd
tcp 0 0 :::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.

复制代码 [root@192.168.4.194 ~]# ssh -p 7233 root@120.25.68.60 root@120.25.68.60's password: Last login: Thu Mar 24 11:01:15 2016 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) 复制代码

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. 参见 http://www.cnblogs.com/phpdragon/p/4521116.html

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

复制代码 #!/bin/sh

if [ -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

exit 1 复制代码

3.客户端编写代理链接守护脚本 ssh_agent_deamon.sh

复制代码 ######################################################################### #######File Name: ssh_agent_deamon.sh #######Author: phpdragon #####mail: phpdragon@qq.com #####Created Time: Thu 24 Mar 2016 01:55:49 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=22

while true ; 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 复制代码

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。

PS:

http://blog.163.com/digoal@126/blog/static/163877040201451464251856

http://www.cnblogs.com/wangkangluo1/archive/2011/06/29/2093727.html

http://www.cnblogs.com/peida/archive/2013/03/08/2949194.html