[expert] ssh reverse mapping problem

[Svante Signell]

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