[CentOS] SSH Automatic Log-on Failure - Centos 5.5

m.roth at 5-cent.us wrote:
> Always Learning wrote:
...
>> Blush, blush .... access is on a non-standard port and then restricted
>> to a few IP addresses.  I don't want my servers taken over by others.
>>
> Security through obscurity doesn't work. Are you familiar with nmap?

If port scanning is a concern, how about implementing port-knocking?

(Granted, it's not always practical.)