RE: Defending againts simultanious attacks

["Plant, Dean" <dean.plant@xxxxxxxxxx>]

Mohd Syakir wrote:
> Hi,
> 
> i have one centos 4.3 box, exposed to the internet.
> since several weeks ago, i found numerous attemps to connect through
> SSH, but failed.
> 
> they tried with many username, including root.
> it's comes from different IP. some of them are foreign website.
> 
> How do i make my centos become smarter in handling this kind of
> attacks. 
> 
> eventhough i've disable all the user accounts, left only the admin
> accounts. making the password so hard, longer and combining alphabet,
> numbers and characters... yet i dont want the attackers keep on
> trying.

Also use rate limit in iptables

Search for "iptables limit ssh" for examples.

Dean
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