Gordon Messmer wrote:
In other words, the hostkeys would be identical.
I think what the error indicates is that a client tried to connect to SSH, and the host key there did not match the fingerprint in the client's "known_hosts" database.
It seems to me that someone attempted an ssh connection while spoofing our internal address. Is such a thing even possible? If so then how does it work?
In the situation as you've described it, probably not.
It would be best to go to your logs themselves for the full log entry and context, rather than relying on a report that summarizes log entries.
Looks like someone trying to break in. You *are* running fail2ban, are you not? If not, you need to install and fire it up, now.
I see a *lot* of this... but then, I work for a US gov't federal contractor (civilian sector), and let me assure you, I get tired of all the attempts from China, Brazil, and other places trying to ssh in - it really clutters my logfiles.
mark