[CentOS] Iptables questions

2010/8/11 John Doe <jdmls at yahoo.com>:
> From: Whit Blauvelt <whit at transpect.com>
>
>> On Tue, Aug 10, 2010 at 07:12:59PM -0400, Bob Hoffman wrote:
>> > I have  a server sitting right on the net and the constant barrage of 100s
> of
>> >  Ips trying thousands of times at port 22 is insane.
>> You're quite sane.  Anyone likely to hit your ssh at its new port is likely
>> to try port 22 first.  So if they show up there first, blocking them is good
>> - unless you have  legitimate users who may forget to go to your special port
>> and so get locked  out after trying the default port first.
>
> There's also port knocking...

how about enabling ssh login only with public keys ?

--
Eero,
RHCE