[Docs] [txt|pdf|xml] [Tracker] [WG] [Email] [Diff1] [Diff2] [Nits]
Versions: (draft-mauch-bgp-reject) 00 01 02
03 04 05 06 07 08 RFC 8212
Global Routing Operations J. Mauch
Internet-Draft J. Snijders
Intended status: Standards Track NTT
Expires: November 11, 2016 May 10, 2016
By default reject propagation when no policy is associated with a BGP
peering session.
draft-ietf-grow-bgp-reject-01
Abstract
This document defines the default behaviour of a BGP speaker when no
explicit policy is associated with a BGP peering session.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on November 11, 2016.
Copyright Notice
Copyright (c) 2016 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Mauch & Snijders Expires November 11, 2016 [Page 1]
Internet-Draft BGP-DEFAULT-REJECT May 2016
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Requirements Language . . . . . . . . . . . . . . . . . . . . 2
3. Solution Requirements . . . . . . . . . . . . . . . . . . . . 2
4. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 3
5. Security Considerations . . . . . . . . . . . . . . . . . . . 3
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 3
7. References . . . . . . . . . . . . . . . . . . . . . . . . . 3
7.1. Normative References . . . . . . . . . . . . . . . . . . 3
7.2. Informative References . . . . . . . . . . . . . . . . . 4
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 4
1. Introduction
BGP [RFC4271] speakers have many default settings which need to be
revisited as part of improving the routing ecosystem. There is a
need to provide guidance to BGP implementors for the default
behaviors of a well functioning internet ecosystem. Routing leaks
[I-D.ietf-idr-route-leak-detection-mitigation] are part of the
problem, but software defects and operator misconfigurations are just
a few of the attacks on internet stability we aim to address.
Usually BGP speakers accept all routes from a configured peer or
neighbor. This practice dates back to the early days of internet
protocols in being very permissive in offering routing information to
allow all networks to reach each other. With the core of the
internet becoming more densely interconnected the risk of a
misbehaving edge device or BGP speaking customer poses signficiant
risks to the reachability of critical services.
This proposal intends to solve this situation by requiring the
explicit configuration of BGP policy for any non-iBGP speaking
session such as customers, peers or confederation boundaries. When
this solution is implemented, devices will no longer pass routes
without explicit policy.
2. Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119].
3. Solution Requirements
The following requirements apply to the solution described in this
document:
Mauch & Snijders Expires November 11, 2016 [Page 2]
Internet-Draft BGP-DEFAULT-REJECT May 2016
o Software MUST mark any routes from an eBGP peer as 'invalid' in
the Adj-RIB-In, if no explicit policy was configured.
o Software MUST NOT advertise any routes to an eBGP peer without an
operator configuring a policy.
o Software MUST NOT require a configuration directive to operate in
this mode.
o Software MUST provide protection from internal failures preventing
the advertisement and acceptance of routes.
o Software MAY provide a configuration option to disable this
security capability.
4. Acknowledgements
The authors would like to thank the following people for their
comments and support: Shane Amante, Christopher Morrow, Robert
Raszuk, Greg Skinner.
5. Security Considerations
This document addresses the basic security posture of a BGP speaking
device within a network. Operators have a need for implementors to
address the problem through a behavior change to mitigate against
possible attacks from a permissive security posture. Attacks and
inadvertent advertisements cause business impact necessitating this
default behavior.
6. IANA Considerations
This document has no actions for IANA.
7. References
7.1. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<http://www.rfc-editor.org/info/rfc2119>.
[RFC4271] Rekhter, Y., Ed., Li, T., Ed., and S. Hares, Ed., "A
Border Gateway Protocol 4 (BGP-4)", RFC 4271,
DOI 10.17487/RFC4271, January 2006,
<http://www.rfc-editor.org/info/rfc4271>.
Mauch & Snijders Expires November 11, 2016 [Page 3]
Internet-Draft BGP-DEFAULT-REJECT May 2016
7.2. Informative References
[I-D.ietf-idr-route-leak-detection-mitigation]
Sriram, K., Montgomery, D., Dickson, B., Patel, K., and A.
Robachevsky, "Methods for Detection and Mitigation of BGP
Route Leaks", draft-ietf-idr-route-leak-detection-
mitigation-02 (work in progress), March 2016.
Authors' Addresses
Jared Mauch
NTT Communications, Inc.
8285 Reese Lane
Ann Arbor Michigan 48103
US
Email: jmauch@us.ntt.net
Job Snijders
NTT Communications, Inc.
Theodorus Majofskistraat 100
Amsterdam 1065 SZ
NL
Email: job@ntt.net
Mauch & Snijders Expires November 11, 2016 [Page 4]
Html markup produced by rfcmarkup 1.129d, available from
https://tools.ietf.org/tools/rfcmarkup/