Attempting to SSH into my server, I got the "SOMEONE DOING SOMETHING NASTY" message. First time. The message states, "It is also possible that a host key has just been changed."
I am not clear about the meaning of "just".
Does it mean "has recently changed" or does it mean "no big deal, the key has changed".
Either way, I want to know WHY would the key change? I am not aware of anything I did that would cause it to change.
My IP address has not changed. I am working with this server on various ports and everything is normal.
All of the questions about this problem recommend to remove the old key in my known_hosts file, and I have done that.
Is this dramatic error message meant to be basically ignored, or could there really be someone doing something nasty?