--- 1/draft-ietf-idr-shutdown-08.txt 2017-05-25 21:13:11.062218745 -0700 +++ 2/draft-ietf-idr-shutdown-09.txt 2017-05-25 21:13:11.082219217 -0700 @@ -1,21 +1,21 @@ IDR J. Snijders Internet-Draft NTT Updates: 4486 (if approved) J. Heitz Intended status: Standards Track Cisco -Expires: November 6, 2017 J. Scudder +Expires: November 25, 2017 J. Scudder Juniper - May 5, 2017 + May 24, 2017 BGP Administrative Shutdown Communication - draft-ietf-idr-shutdown-08 + draft-ietf-idr-shutdown-09 Abstract This document enhances the BGP Cease NOTIFICATION message "Administrative Shutdown" and "Administrative Reset" subcodes for operators to transmit a short freeform message to describe why a BGP session was shutdown or reset. This document updates RFC 4486. Requirements Language @@ -31,21 +31,21 @@ 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 6, 2017. + This Internet-Draft will expire on November 25, 2017. Copyright Notice 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 @@ -166,24 +166,28 @@ Reset" in the "Cease NOTIFICATION message subcodes" registry under the "Border Gateway Protocol (BGP) Parameters" group in addition to [RFC4486]. 6. Security Considerations This document uses UTF-8 encoding for the Shutdown Communication. There are a number of security issues with UNICODE. Implementers and operator are advised to review UNICODE TR36 [UTR36] to learn about these issues. UTF-8 "Shortest Form" encoding is REQUIRED to guard - against the technical issues outlined in UTR36. However, the visual - spoofing due to character confusion still persists. This - specification minimizes the effects of visual spoofing by limiting - the length of the Shutdown Communication. + against the technical issues outlined in UTR36. + + As BGP Shutdown Communications are likely to appear in syslog output, + there is a risk that carefully constructed Shutdown Communication + might be formatted by receiving systems in a way to make them appear + as additional syslog messages. To limit the ability to mount such an + attack, the BGP Shutdown Communication is limited to 128 octets in + length. Users of this mechanism should be aware that unless a transport that provides integrity is used for the BGP session in question, a Shutdown Communication message could be forged. Unless a transport that provides confidentiality is used, a Shutdown Communication message could be snooped by an attacker. These issues are common to any BGP message but may be of greater interest in the context of this proposal since the information carried in the message is generally expected to be used for human-to-human communication. Refer to the related considerations in [RFC4271] and [RFC4272]. @@ -258,35 +262,35 @@ [UTR36] Davis, M. and M. Suignard, "Unicode Security Considerations", Unicode Technical Report #36, August 2010, . Appendix A. Acknowledgements The authors would like to gratefully acknowledge Tom Scholl, David Freedman, Jared Mauch, Jeff Haas, Peter Hessler, Bruno Decraene, John Heasley, Peter van Dijk, Arjen Zonneveld, James Bensley, Susan Hares, - Saku Ytti, Lou Berger, and Alvaro Retana. + Saku Ytti, Lou Berger, Alvaro Retana, and Adam Roach. Authors' Addresses Job Snijders NTT Communications Theodorus Majofskistraat 100 Amsterdam 1065 SZ The Netherlands Email: job@ntt.net Jakob Heitz Cisco 170 West Tasman Drive - San Jose, CA 95054 + San Jose, CA 95134 USA Email: jheitz@cisco.com John Scudder Juniper Networks 1194 N. Mathilda Ave Sunnyvale, CA 94089 USA