$ ssh hostname
reverse mapping checking getaddrinfo for client.example.com [10.0.0.1] failed - POSSIBLE BREAK-IN ATTEMPT!
username@hostname password:
Resolution
There are several ways to resolve this issue:
- Setup a Reverse DNS Record (aka PTR Record) for the SSH client.
- Ensure
UseDNS noandGSSAPIAuthentication noare set in/etc/ssh/sshd_configon the SSH server, then restart the sshd. - Confirm that
/etc/hostson the SSH server has an entry for the SSH client IP address and hostname.
Recent Comments