Merit Network
Can't find what you're looking for? Search the Mail Archives.
  About Merit   Services   Network   Resources & Support   Network Research   News   Events   Home

Discussion Communities: Merit Network Email List Archives

North American Network Operators Group

Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical

Forwarded: 47th IETF: ITRACE BOF

  • From: Steven M. Bellovin
  • Date: Wed Mar 01 19:58:09 2000


------- Forwarded Message

Return-Path: <ietf-123-owner@loki.ietf.org>
Received: from postal.research.att.com
	by fetchmail-4.5.7 POP3
	for <smb/localhost> (single-drop); Wed, 01 Mar 2000 19:23:02 EST
Received: from mail-green.research.att.com (mail-green.research.att.com [135.207.30.103])
	by postal.research.att.com (8.8.7/8.8.7) with ESMTP id TAA10215
	for <smb@postal.research.att.com>; Wed, 1 Mar 2000 19:20:12 -0500 (EST)
Received: by mail-green.research.att.com (Postfix)
	id 1F98A1E032; Wed,  1 Mar 2000 19:20:12 -0500 (EST)
Received: from loki.ietf.org (loki.ietf.org [132.151.1.177])
	by mail-green.research.att.com (Postfix) with ESMTP
	id 10D301E036; Wed,  1 Mar 2000 19:20:07 -0500 (EST)
Received: (from adm@localhost)
	by loki.ietf.org (8.9.1b+Sun/8.9.1) id SAA05354
	for ietf-123-outbound.01@ietf.org; Wed, 1 Mar 2000 18:25:00 -0500 (EST)
Received: from ietf.org (odin.ietf.org [10.27.2.28])
	by loki.ietf.org (8.9.1b+Sun/8.9.1) with ESMTP id SAA05280
	for <all-ietf@loki.ietf.org>; Wed, 1 Mar 2000 18:13:06 -0500 (EST)
Received: from CNRI.Reston.VA.US (localhost [127.0.0.1])
	by ietf.org (8.9.1a/8.9.1a) with ESMTP id SAA16131;
	Wed, 1 Mar 2000 18:13:04 -0500 (EST)
Delivered-To: smb@research.att.com
Message-Id: <200003012313.SAA16131@ietf.org>
To: IETF-Announce: ;
From: ietf-secretariat@ietf.org
Cc: new-work@ietf.org
Subject: 47th IETF: ITRACE BOF
Date: Wed, 01 Mar 2000 18:13:03 -0500
Sender: mbeaulie@cnri.reston.va.us
Content-Type: text
X-UIDL: de9f75cb7001aedbabad2854bdf994cd

ICMP Traceback BOF (itrace)

Thursday, March 30 at 1530-1730
===============================

CHAIR: Steve Bellovin <smb@research.att.com>

DESCRIPTION:

The purpose of the BoF is to look at a mechanism to help address the 
problem of tracing back denial of service attacks.  The suggested
mechanism is that with low probability (order 1/20,000), a router
seeing a packet would send to the destination an ICMP message giving
as much information as it knows about the immediate previous hop of 
that packet.  With enough of these messages -- and if one is being 
flooded, by definition there will be a lot of traffic, so that the 
low probabilities will still result in a reasonably complete set of 
traceback packets.

Such a mechanism has other uses as well.  It lets people trace down
the source of accidentally-emitted bogus packets, i.e., those with
RFC1918 addresses.  It helps characterize the reverse path, which
traceroute does not do.

The output will be a standards-track RFC describing the packet format, 
and the conditions under which it should be sent.  Issues include 
authentication, router load, and host load.

AGENDA:

  Introduction, motivation        15 min
  Marcus Leech's prototype        20 min
  Open issues list                30 min
  Charter                         20 min



------- End of Forwarded Message



		--Steve Bellovin







Discussion Communities


About Merit | Services | Network | Resources & Support | Network Research
News | Events | Contact | Site Map | Merit Network Home


Merit Network, Inc.