Snort mailing list archives

Re: DDOS shaft synflood


From: Ryan Russell <ryan () securityfocus com>
Date: Fri, 28 Dec 2001 17:13:55 -0700 (MST)

On Fri, 28 Dec 2001, Steve Ochani wrote:

12/27-22:56:14.501565 [**] [1:241:2] DDOS shaft synflood [**]
[Classification: Attempted Denial of Service] [Priority: 2] {TCP}
198.xxx.xxx.xxx:1466 -> 213.xxx.xxx.xxx:1

That rule simply looks for SYN packets with a particular sequence number.
Those are bound to happen normally on occasion.  However, the port number
1 is a bit strange.  Which one of those address ranges is your net?

                                                Ryan


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