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Date: Thu, 01 Sep 2005 11:10:45 -0400
From: Chuck Swiger <cswiger@mac.com>
Organization: The Courts of Chaos
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To: Dark Star <dead_line@hotmail.com>
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Cc: freebsd-questions@freebsd.org
Subject: Re: Limiting closed port
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Dark Star wrote:
>   /kernel: Limiting closed port RST response from 243 to 200 packets per 
> second
>   /kernel: Limiting closed port RST response from 222 to 200 packets per 
> second
>   /kernel: Limiting closed port RST response from 238 to 200 packets per 
> second
> 
>   I think its sometype of scan or attack.

It's almost certainly a portscan.  Per se, that's not an attack, but if someone 
follows up trying to exploit open services, it would be.

>   My server has a range of ips, I'm not sure what is this? how to 
> protect it? IPFW will prevent this?

Yes, IPFW, PF, or another firewall can prevent this traffic.

>   how do i know, this attack to what IP excatly?

Run "tcpdump -n".

-- 
-Chuck