Azitech

Azimout's Linux weblog

reverse mapping failed

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When you ssh into a machine from the same subnet, it tries to reverse-lookup you IP address. When that failes, sshd writes a message in your /var/log/auth.log saying:

reverse mapping checking getaddrinfo for rfc-1918 [ip_address_here] failed – POSSIBLE BREAK-IN ATTEMPT!

To stop getting that, add the names of your subnet machines in /etc/hosts

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Written by azimout

01/11/2009 at 14:03

Posted in Problems

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