On Fri, Feb 25, 2000 at 11:22:35AM -0500, John Davis wrote: > Hello > > I keep getting HOST IDENTIFICATION HAS CHANGED! errors. How do I prevent > these errors and how do I ensure > that my machines are not under attack from someone? > > On one machine, I get this message everytime I connect to it. I have tried > to reinstall ssh via apt-get remove/install ssh, > and I still get the error message everytime.
Reinstalling ssh won't solve the problem as some simple reading would make clear. See below. > suit:~$ ssh mrfan > @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ > @ WARNING: 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 host key has just been changed. > Please contact your system administrator. [ start paying attention now :) ] > Add correct host key in /home/davis/.ssh/known_hosts to get rid of this > message. Try following the directions given here. Take a look at your ~/.ssh/known_hosts file and make sure the key for mrfan listed in the file matches the key on mrfan. Cheers, -- Nathan Norman "Eschew Obfuscation" Network Engineer GPG Key ID 1024D/51F98BB7 http://home.midco.net/~nnorman/ Key fingerprint = C5F4 A147 416C E0BF AB73 8BEF F0C8 255C 51F9 8BB7
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