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Ssh Login Password Prompt Too Slow

Recently, I experienced an issue with ssh authentication – password prompt taking too long on one of the linux servers.  After some research on internet, I found the solution which I would like to share.

1. Turn off - UseDNS by setting the value to "no" in your /etc/ssh/sshd_config

UseDNS no

2. Restart sshd Demon

# service sshd restart

Once you restart sshd demon, you should experience the password prompt appearing instantly.