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Re: ssh fingerprint mismatch for one single client

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On Sun, Sep 20, 2020 at 01:59:41PM -0300, Beco wrote:
> Thank you all so much for thid new batch of input Mick, LARAC, David, Tomas
> and Reco
> Bellow I'll try to answer in a brief way all at once:
> 
> 
> 
> 
> On Sun, 20 Sep 2020 at 00:34, mick crane <mick.crane@gmail.com> wrote:
> > Is this Putty or something with keys on student's PC ?
> 
> No keys on PUTTY. Log in with password.
> 
> > If worked before maybe something went wrong with the saved connection
> > but that doesn't explain why cannot connect via phone>router WIFI unless
> > there is separate issue there.
> 
> Exactly. How come phone>wifi don't work, and phone>mobile-net works ?

Yes. Given the data you've provided, I retract my first hunch: it seems
your student is seeing a different host:

 - either DNS resolves to a different IP address -- then you'd see
   different IP addresses for your server as viewed from your student's
   workstation wrt the "rest of the world

 - or routing sends your student to a different host (claiming the
   same IP address, that stinks ;-)

Traceroute might help in the second case. Besides, you wouldn't see your
student's access attempts in your server logs -- after all, he's knocking
at another door.

Cheers
 - t

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Thread

ssh fingerprint mismatch for one single client Beco <rcb@beco.cc> - 2020-09-19 23:30 +0200
  Re: ssh fingerprint mismatch for one single client Lucas Castro <lucas@gnuabordo.com.br> - 2020-09-19 23:50 +0200
    Re: ssh fingerprint mismatch for one single client Beco <rcb@beco.cc> - 2020-09-20 00:40 +0200
  Re: ssh fingerprint mismatch for one single client mick crane <mick.crane@gmail.com> - 2020-09-20 00:00 +0200
    Re: ssh fingerprint mismatch for one single client Beco <rcb@beco.cc> - 2020-09-20 00:50 +0200
      Re: ssh fingerprint mismatch for one single client mick crane <mick.crane@gmail.com> - 2020-09-20 05:40 +0200
      Re: ssh fingerprint mismatch for one single client David Christensen <dpchrist@holgerdanske.com> - 2020-09-20 08:00 +0200
  Re: ssh fingerprint mismatch for one single client Reco <recoverym4n@enotuniq.net> - 2020-09-20 10:50 +0200
    Re: ssh fingerprint mismatch for one single client Beco <rcb@beco.cc> - 2020-09-20 19:10 +0200
      Re: ssh fingerprint mismatch for one single client Beco <rcb@beco.cc> - 2020-09-20 19:20 +0200
      Re: ssh fingerprint mismatch for one single client Reco <recoverym4n@enotuniq.net> - 2020-09-20 19:30 +0200
      Re: ssh fingerprint mismatch for one single client Fabien Roucaute <fabien.roucaute@free.fr> - 2020-09-20 20:40 +0200
      Re: ssh fingerprint mismatch for one single client tomas@tuxteam.de - 2020-09-21 09:20 +0200
        (solved) Re: ssh fingerprint mismatch for one single client Beco <rcb@beco.cc> - 2020-09-23 02:00 +0200
  Re: ssh fingerprint mismatch for one single client <tomas@tuxteam.de> - 2020-09-20 10:50 +0200

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