Re: DDOS shaft synflood

[Steve Ochani <jpegny () optonline net>]

On 28 Dec 2001 at 17:13, Ryan Russell wrote:

> 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?

This was just one occurrence I picked out, i had quite a lot occur on the 27th and now no 
more. They ranged to all ranges of ports, low to high. The 198 address was a machine on my 
net.



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