[Labs-l] Fingerprint change

Wed Aug 26 23:33:17 UTC 2015

No, the banner is shown BEFORE authentication is made; see sshd_config
<http://linux.die.net/man/5/sshd_config>.

On Wed, Aug 26, 2015 at 7:19 PM, Tim Landscheidt <tim at tim-landscheidt.de>
wrote:

> (anonymous) wrote:
>
> >>> It looks like a temporal error. Now there is no warning.
>
> >> This happens when our network service crashes.  While the network
> >> service is down, all traffic bound for a specific instance instead hits
> >> the network server.  Ssh blithely tries to log in there, sees the wrong
> >> host key, and complains.
>
> >> This was a side-effect of the upgrade I'm in the middle of.  I'm done
> >> with the networking stuff so the problem shouldn't recur immediately.  I
> >> don't know how to avoid it entirely :(
>
> > As that host is not supposed to get any connection, I would
> > put a Banner entry on sshd_config saying "This is not the
> > drone you were expecting to log into" (or a more elaborate
> > phrase of your email :P).
> > That would at least hint that instead of panicking we should
> > go to irc to bug you for crashing the network service ;)
>
> Isn't the banner only shown after establishing the connec-
> tion, i. e. after the user would "fix" the host's finger-
> print?
>
> Tim
>
>
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