From owner-freebsd-questions Mon Nov 24 10:42:02 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id KAA23004 for questions-outgoing; Mon, 24 Nov 1997 10:42:02 -0800 (PST) (envelope-from owner-freebsd-questions) Received: from cobblers.csc.ncsu.edu (cobblers.csc.ncsu.edu [152.1.75.165]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id KAA22990 for ; Mon, 24 Nov 1997 10:41:53 -0800 (PST) (envelope-from fwang2@cobblers.csc.ncsu.edu) Received: from localhost (fwang2@localhost) by cobblers.csc.ncsu.edu (8.8.7/8.8.7) with SMTP id NAA13036 for ; Mon, 24 Nov 1997 13:40:53 -0500 (EST) (envelope-from fwang2@cobblers.csc.ncsu.edu) Date: Mon, 24 Nov 1997 13:40:53 -0500 (EST) From: "Oliver R. Wang " To: FreeBSD Questions Subject: land attack - technical explaination? Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@freebsd.org X-Loop: FreeBSD.org Precedence: bulk Hi there What I know about "land" attack is that it send a TCP packet with source address, source port, destination address, destination port set as the same. My question is can someone explain to me why this will cause system degradation or even crash? What's fix in FreeBSD? If there isn't a short answer, pointer of info is appreciated. /oliver