[3464] in bugtraq

home help back first fref pref prev next nref lref last post

Re: Excellent host SYN-attack fix for BSD hosts

daemon@ATHENA.MIT.EDU (Alan Cox)
Tue Oct 15 13:56:37 1996

Date: 	Tue, 15 Oct 1996 09:27:20 +0100
Reply-To: Alan Cox <coxa@cableol.net>
From: Alan Cox <coxa@cableol.net>
X-To:         jaw@Op.Net
To: Multiple recipients of list BUGTRAQ <BUGTRAQ@NETSPACE.ORG>
In-Reply-To:  <199610141743.NAA23076@sulcus.op.net> from "Jeff Weisberg" at Oct
              14, 96 01:43:09 pm

> | It also breaks TCP's algorithm for
> | recognizing stale data.
>
> how so?

The ISS must always be going forward, and at a suitable rate. If you look
at things like the MD5 secret based secure sequence numbers you will
see that they are monotonically increasing w.r.t. a single IP address

Alan

home help back first fref pref prev next nref lref last post