[CentOS] Delay in SSH login..

Tue Apr 4 00:05:38 UTC 2006
Jim Perrin <jperrin at gmail.com>

> =========================================
>  Can you please advice what is the correct way to disable it.

Sure. A brief reading from TFM:

UseDNS: Specifies whether sshd should lookup the remote host name and
check that the resolved host name for the remote IP address maps back
to the very same IP address.  The default is "yes".

If you're going to disable DNS lookups, set this to 'NO'.

Any sufficiently advanced technology is indistinguishable from magic.
-Arthur C. Clarke