reverse mapping checking getaddrinfo failed - POSSIBLE BREAK-IN

Chris Adams cmadams at
Fri Jan 23 06:01:50 EST 2009

Once upon a time, Tiago Marques <a28427 at> said:
> This is the full message that i'm getting:
> reverse mapping checking getaddrinfo for ***.***.***.*** failed - POSSIBLE
> I've searched google but didn't found any good answer about this. What
> exactly is happening?

Your sshd was built with tcp_wrappers, which checks for matching forward
and reverse DNS (and the connecting IP has reverse DNS that does not
resolve in forward DNS).  It is really mostly a nuisance message.

Chris Adams <cmadams at>
Systems and Network Administrator - HiWAAY Internet Services
I don't speak for anybody but myself - that's enough trouble.

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