This is an indication that reverse dns does not work for user from ip
address aa.bb.cc. try adding that ip address in /etc/hosts. that might
help.
On Thu, 1 Feb 2001, Svante Signell wrote:
> Shall I take this seriously? Which programs to check? Where to look?
>
> Feb 1 20:20:10 computer sshd[864]: WARNING: /etc/ssh/primes does not
> exist, using old prime
> Feb 1 20:20:15 computer sshd[864]: reverse mapping checking
> getaddrinfo for aa.bb.cc failed - POSSIBLE BREAKIN ATTEMPT!
> Feb 1 20:20:15 compaq sshd[864]: Accepted password for user from
> xx.yy.zz port 1020 ssh2
>