How to remove strict RSA key checking in SSH and what's the problem here?

Posted by setatakahashi on Server Fault See other posts from Server Fault or by setatakahashi
Published on 2009-05-08T11:34:43Z Indexed on 2014/06/07 3:32 UTC
Read the original article Hit count: 506

Filed under:

security

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ssh

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rsa

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man-in-the-middle

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hostkey

I have a Linux server that whenever I connect it shows me the message that changed the SSH host key:

$ ssh root@host1 @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 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 93:a2:1b:1c:5f:3e:68:47:bf:79:56:52:f0:ec:03:6b. Please contact your system administrator. Add correct host key in /home/emerson/.ssh/known_hosts to get rid of this message. Offending key in /home/emerson/.ssh/known_hosts:377

RSA host key for host1 has changed and you have requested strict checking. Host key verification failed.

It keeps me for a very few seconds logged in and then it closes the connection.

host1:~/.ssh # Read from remote host host1: Connection reset by peer Connection to host1 closed.

Does anyone know what's happening and what I could do to solve this problem?

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