课程第29次

botang

192.168.0.4 ssh  连接 192.168.0.5的时候， 前者是Alice，后者是Bob
（谁输入密码谁是Alice, 谁有公钥和私钥对谁是Bob）




如果BOB的公钥不对的话，Alice出现：

1. [root@station4 ssh]# ssh 192.168.0.5
   
2. ssh_exchange_identification: read: Connection reset by peer
   
3. [root@station4 ssh]# ssh 192.168.0.5
   
4. @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
   
5. @    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
   
6. @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
   
7. IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
   
8. Someone could be eavesdropping on you right now (man-in-the-middle attack)!
   
9. It is also possible that a host key has just been changed.
   
10. The fingerprint for the ECDSA key sent by the remote host is
    
11. SHA256:mD3xiUZRelmK4f4aQPpn/CyWd0umnJ5UAYDwQ6tZd10.
    
12. Please contact your system administrator.
    
13. Add correct host key in /root/.ssh/known_hosts to get rid of this message.
    
14. Offending ECDSA key in /root/.ssh/known_hosts:4
    
15. ECDSA host key for 192.168.0.5 has changed and you have requested strict checking.
    
16. Host key verification failed.
    

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