--- 1/draft-ietf-grow-bgp-reject-02.txt 2017-02-21 13:13:13.259414895 -0800 +++ 2/draft-ietf-grow-bgp-reject-03.txt 2017-02-21 13:13:13.271415177 -0800 @@ -1,27 +1,26 @@ Global Routing Operations J. Mauch Internet-Draft J. Snijders Intended status: Standards Track NTT -Expires: May 4, 2017 G. Hankins +Expires: August 25, 2017 G. Hankins Nokia - October 31, 2016 + February 21, 2017 - Default IPv4 and IPv6 Unicast EBGP Route Propagation Behavior Without - Policies - draft-ietf-grow-bgp-reject-02 + Default EBGP Route Propagation Behavior Without Policies + draft-ietf-grow-bgp-reject-03 Abstract This document defines the default behavior of a BGP speaker when - there is no import or export policy associated with a BGP session for - the IPv4 or IPv6 Unicast Address Family. + there is no import or export policy associated with an External BGP + session. 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]. Status of This Memo This Internet-Draft is submitted in full conformance with the @@ -30,25 +29,25 @@ 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 May 4, 2017. + This Internet-Draft will expire on August 25, 2017. Copyright Notice - Copyright (c) 2016 IETF Trust and the persons identified as the + Copyright (c) 2017 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 @@ -70,69 +69,71 @@ 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 implementers for the default behaviors of a well functioning Internet ecosystem. Routing leaks [RFC7908] 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. - Many BGP speakers send and accept all routes from a peer by default. - This practice dates back to the early days of the Internet, where - operators were permissive in offering routing information to allow - all networks to reach each other. As the Internet has become more - densely interconnected, the risk of a misbehaving BGP speaker poses + Many deployed BGP speakers send and accept any and all route + announcements between their BGP neighbors by default. This practice + dates back to the early days of the Internet, where operators were + permissive in sending routing information to allow all networks to + reach each other. As the Internet has become more densely + interconnected, the risk of a misbehaving BGP speaker poses significant risks to Internet routing. This specification intends to improve this situation by requiring the - explicit configuration of a BGP import and export policy for any EBGP - speaking session such as customers, peers, or confederation - boundaries in a base router or VPN instances. When this solution is - implemented, BGP speakers do not accept or send routes without - policies configured on EBGP sessions. + explicit configuration of a BGP import and export policy for any + External BGP (EBGP) session such as customers, peers, or + confederation boundaries in a base router or VPN instances. When + this solution is implemented, BGP speakers do not accept or send + routes without policies configured on EBGP sessions. 2. Solution Requirements - The following requirements for the IPv4 and IPv6 Unicast Address - Family apply to the solution described in this document: + The following requirements apply to the solution described in this + document: - o Software MUST consider any routes from an EBGP peer invalid, if no - import policy was configured. + o Software MUST consider any routes ineligible for route selection + (section 9.1.1 [RFC4271]), if no import policy was configured for + the EBGP peer. o Software MUST NOT advertise any routes to an EBGP peer, if no export policy was configured. - o Software SHOULD provide protection from internal failures - preventing the advertisement and acceptance of routes. + o Software SHOULD fall back to an "import nothing" and "export + nothing" mode following failure of internal components, such as a + policy engine. o Software MUST operate in this mode by default. o Software MAY provide a configuration option to disable this security capability. 3. Acknowledgments The authors would like to thank the following people for their comments, support and review: Shane Amante, Christopher Morrow, - Robert Raszuk, Greg Skinner, Adam Chappell, Sriram Kotikalapudi, and - Brian Dickson. + Robert Raszuk, Greg Skinner, Adam Chappell, Sriram Kotikalapudi, + Brian Dickson, Jeffrey Haas, and John Heasley. 4. Security Considerations - This document addresses the basic security behavior of how a BGP - speaker propagates routes in a default configuration without - policies. Operators have a need for implementers to address the - problem through a behavior change to mitigate against possible - attacks from a permissive security behavior. Attacks and inadvertent - advertisements cause business impact that can be mitigated by a - secure default behavior. + This document addresses a basic routing security flaw caused by + permissive default routing policy configurations. Operators need + implementers to address this problem with more secure defaults to + mitigate collateral damage on Internet routing. Inadvertent or + adversarial advertisements cause business impact that can be + mitigated by a secure default behavior. 5. IANA Considerations This document has no actions for IANA. 6. Contributors The following people contributed to successful deployment of solution described in this document: