[CentOS] One server not showing SSH port, the other is.

Tue Oct 12 06:39:57 UTC 2010
Sean Hart <boardnutz at blacklight.net>

> Just disable password authentication on ssh and use only keyfiles ..
> --
My initial thought exactly.  Keys, and require passwords on the keys 
too.  Although if you want to be wicked paranoid, knocking + keys would 
work too.