用ssh反向隧道访问内网机器

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@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
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IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that the RSA host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
Please contact your system administrator.
Add correct host key in /home/conbar/.ssh/known_hosts to get rid of this message.
Offending key in /home/conbar/.ssh/known_hosts:10
RSA host key for  has changed and you have requested strict checking.

Host key verification failed.

会出现这信息是因为，第一次SSH连现时，会生成一个认证，储存在客户端（也就是用SSH联机其他电脑的那个，自己操作的那个）中的known_hosts，但是如果服务器端重灌过了，认证信息当然也会更改，服务器端与客户端不同时，就会跳出错误啦～因此，只要把电脑中的认证信息删除，联机时重新生成，就一切完美啦～要删除很简单，只要在客户端输入一个指令

ssh-keygen -R服务器端的IP或网址

接下来在联机一次，会出现

Are you sure you want to continue connecting（yes/no）？

输入yes，就完成联机啦！同时，新的认证也生成了

http://blog.allenchou.cc/warning-remote-host-identification-has-changed/