[lacnog] Fwd: RFC 7112 on Implications of Oversized IPv6 Header Chains

[Fernando Gont]

FYI: <http://www.rfc-editor.org/rfc/rfc7112.txt>

Hace tanto que este documento venía incubandose que hoy me quede sin
dormir para que no se demore mas. :-)


Si Ud. se encuentra tomando mate con bizcochitos, y quiere enterarse de
que se trata la cuestión, sin cortar con la mateada, la idea es así de
simple:

Hasta el momento, las especificaciones permitian la existencia de
paquetes tan ridiculos que tenian la cadena de encabezados IPv6
desparramada en varios fragmentos. Este doumento actualiza la norma base
de IPv6 (RFC 2460), de modo de prohibir dichos paquetes. Es decir, se
requiere que la cadena completa de encabezados siempre este presente en
el primer fragmento (obviamente en los casos que se usa fragmentacion..
ya que sino este problema no se presenta).

Las implicancias de esta actulización son que a partir de ahora, uno
puede realizar filtrado de paquetes "sin estado" (steteless) -- lo cual
es agradable. :-)

Pero no joda... siga tomando mate, que esto lo puede lee en otro momento ;-)

Saludos,
Fernando




-------- Original Message --------
Subject: RFC 7112 on Implications of Oversized IPv6 Header Chains
Date: Wed, 29 Jan 2014 09:30:44 -0800 (PST)
From: rfc-editor en rfc-editor.org
To: ietf-announce en ietf.org, rfc-dist en rfc-editor.org
CC: drafts-update-ref en iana.org, ipv6 en ietf.org, rfc-editor en rfc-editor.org

A new Request for Comments is now available in online RFC libraries.


        RFC 7112

        Title:      Implications of Oversized IPv6 Header
                    Chains
        Author:     F. Gont, V. Manral,
                    R. Bonica
        Status:     Standards Track
        Stream:     IETF
        Date:       January 2014
        Mailbox:    fgont en si6networks.com,
                    vishwas en ionosnetworks.com,
                    rbonica en juniper.net
        Pages:      8
        Characters: 15897
        Updates:    RFC 2460

        I-D Tag:    draft-ietf-6man-oversized-header-chain-09.txt

        URL:        http://www.rfc-editor.org/rfc/rfc7112.txt

The IPv6 specification allows IPv6 Header Chains of an arbitrary
size.  The specification also allows options that can, in turn,
extend each of the headers.  In those scenarios in which the IPv6
Header Chain or options are unusually long and packets are
fragmented, or scenarios in which the fragment size is very small,
the First Fragment of a packet may fail to include the entire IPv6
Header Chain.  This document discusses the interoperability and
security problems of such traffic, and updates RFC 2460 such that the
First Fragment of a packet is required to contain the entire IPv6
Header Chain.

This document is a product of the IPv6 Maintenance Working Group of the
IETF.

This is now a Proposed Standard.

STANDARDS TRACK: This document specifies an Internet standards track
protocol for the Internet community,and requests discussion and suggestions
for improvements.  Please refer to the current edition of the Internet
Official Protocol Standards (STD 1) for the standardization state and
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