Re: public key access error
From: Bill Unruh (unruh_at_string.physics.ubc.ca)
Date: 10/29/04
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Date: 29 Oct 2004 21:56:10 GMT
"Daniel Huang" <danielhuang@hotmail.com> writes:
]Hi, I have one Linux client machine A get reinstalled yesterday and the it's
]ssh hostkey got changed.
Yes. If you saved the old key (in /etc/ssh) just put it back and all will
be well. If you did not, next time remember to always save the whole of
/etc/ before you reinstall.
]but We used to login in to this machine A with public key through another
]unix machine B which we dont' have root access.
]Since the linux client A box's host key was changed , so when we try to ssh
]to the linux A from the unix machine B, we got reject as the B still trying
]to remember the old linux B host key.
]I remove the host key from the known_hosts file from unix B, still got msg:
They can be there either as host name or as ip address, or both. Remove
both.
] @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
] @ 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
] 23:00:20:83:de:02:95:f1:e3:34:be:57:3f:cf:2c:e7.
] Please contact your system administrator.
] Add correct host key in /home/xahria/.ssh/known_hosts to get rid of this
]message.
] Offending key in /home/xahria/.ssh/known_hosts:8
This tells you which line in known_hosts you need to remove.
Remove it.
] RSA host key for localhost has changed and you have requested strict
]checking.
] Host key verification failed.
]looks like the unix B's stricthostkeychecking=yes, and won't allow us to
]change any machine's host key.
]Any idea on this ?
Remove line 8 in /home/xahria/.ssh/known_hosts
]Thanks
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