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+Internet Engineering Task Force (IETF) R. Danyliw
+Request for Comments: 9141 Software Engineering Institute
+Updates: 2077, 2418, 2648, 2954, 2955, 3020, November 2021
+ 3083, 3201, 3202, 3295, 3684, 3962,
+ 3970, 4036, 4131, 4251, 4323, 4546,
+ 4547, 4639, 4682, 5098, 5428, 6756,
+ 7241
+Category: Standards Track
+ISSN: 2070-1721
+
+
+ Updating References to the IETF FTP Service
+
+Abstract
+
+ The IETF FTP service running at ftp.ietf.org, ops.ietf.org, and
+ ietf.org will be retired. A number of published RFCs in the IETF and
+ IAB streams include URIs that reference this FTP service. To ensure
+ that the materials referenced using the IETF FTP service can still be
+ found, this document updates the FTP-based references in these
+ affected documents with HTTPS URIs.
+
+Status of This Memo
+
+ This is an Internet Standards Track document.
+
+ This document is a product of the Internet Engineering Task Force
+ (IETF). It represents the consensus of the IETF community. It has
+ received public review and has been approved for publication by the
+ Internet Engineering Steering Group (IESG). Further information on
+ Internet Standards is available in Section 2 of RFC 7841.
+
+ Information about the current status of this document, any errata,
+ and how to provide feedback on it may be obtained at
+ https://www.rfc-editor.org/info/rfc9141.
+
+Copyright Notice
+
+ Copyright (c) 2021 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
+ (https://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 Revised BSD License text as described in Section 4.e of the
+ Trust Legal Provisions and are provided without warranty as described
+ in the Revised BSD License.
+
+Table of Contents
+
+ 1. Introduction
+ 2. Conventions and Definitions
+ 3. Updated References
+ 3.1. RFC 2077
+ 3.2. RFC 2418
+ 3.3. RFC 2648
+ 3.4. RFC 2954
+ 3.5. RFC 2955
+ 3.6. RFC 3020
+ 3.7. RFC 3083
+ 3.8. RFC 3201
+ 3.9. RFC 3202
+ 3.10. RFC 3295
+ 3.11. RFC 3684
+ 3.12. RFC 3962
+ 3.13. RFC 3970
+ 3.14. RFC 4036
+ 3.15. RFC 4131
+ 3.16. RFC 4251
+ 3.17. RFC 4323
+ 3.18. RFC 4546
+ 3.19. RFC 4547
+ 3.20. RFC 4639
+ 3.21. RFC 4682
+ 3.22. RFC 5098
+ 3.23. RFC 5428
+ 3.24. RFC 6756
+ 3.25. RFC 7241
+ 3.26. Generic Guidance
+ 4. Security Considerations
+ 5. IANA Considerations
+ 6. References
+ 6.1. Normative References
+ 6.2. Informative References
+ Acknowledgments
+ Author's Address
+
+1. Introduction
+
+ After community consultation in late 2020, it was decided to retire
+ the IETF FTP service running at ftp.ietf.org, ops.ietf.org, and
+ ietf.org [FTP-RETIREMENT]. Appendix B of [FTP-RETIREMENT-PLAN]
+ identifies 30 RFCs published in the IETF and IAB streams between
+ 1997-2006 that have at least one explicit or inline reference to a
+ URI pointing to the IETF FTP service. To ensure that the materials
+ referenced using the IETF FTP service can still be found, this
+ document formally updates those RFCs that had not been updated by
+ other documents with HTTPS URIs to the same materials.
+
+ Section 3 enumerates each of the affected RFCs and provides
+ replacement text.
+
+2. Conventions and Definitions
+
+ The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
+ "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
+ "OPTIONAL" in this document are to be interpreted as described in
+ BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all
+ capitals, as shown here.
+
+ The original text from an RFC to be updated will be quoted with
+ "OLD", and the replacement text will be quoted with "NEW".
+
+3. Updated References
+
+ This document updates the following RFCs.
+
+ [RFC2077] [RFC2418] [RFC2648] [RFC2954] [RFC2955] [RFC3020] [RFC3083]
+ [RFC3201] [RFC3202] [RFC3295] [RFC3684] [RFC3962] [RFC3970] [RFC4036]
+ [RFC4131] [RFC4251] [RFC4323] [RFC4546] [RFC4547] [RFC4639] [RFC4682]
+ [RFC5098] [RFC5428]
+
+ Additionally, with permission of the IAB, [RFC6756] and [RFC7241] are
+ also updated.
+
+3.1. RFC 2077
+
+ Section 3 of [RFC2077] is updated as follows:
+
+ OLD:
+
+ | Copies of RFCs are available on:
+ |
+ | ftp://ftp.isi.edu/in-notes/
+ |
+ | Copies of Internet-Drafts are available on:
+ |
+ | ftp://ftp.ietf.org/internet-drafts/
+
+ NEW:
+
+ | Copies of RFCs are available on:
+ |
+ | https://www.rfc-editor.org/rfc/
+ |
+ | Copies of Internet-Drafts are available on:
+ |
+ | https://www.ietf.org/id/
+
+3.2. RFC 2418
+
+ Section 2.2 of [RFC2418] is updated as follows:
+
+ OLD:
+
+ | Those archives are located at ftp://ftp.ietf.org/ietf-mail-
+ | archive.
+
+ NEW:
+
+ | Those archives are located at https://www.ietf.org/ietf-ftp/ietf-
+ | mail-archive/.
+
+3.3. RFC 2648
+
+ Section 2 of [RFC2648] is updated below. Note that the scripts in
+ Appendix A have not been updated.
+
+ OLD:
+
+ | The list of minutes maintained by the IETF for each working group
+ | and conference in the subtree pointed at by the URL
+ | ftp://ietf.org/ietf/ is considered the definitive assignment of
+ | URNs for working group or birds of a feather minutes.
+
+ NEW:
+
+ | The list of minutes maintained by the IETF for each working group
+ | and conference in the subtree pointed at by the URL
+ | https://www.ietf.org/how/meetings/proceedings/ is considered the
+ | definitive assignment of URNs for working group or birds of a
+ | feather minutes.
+
+3.4. RFC 2954
+
+ The CONTACT-INFO in the MIB in Section 3 of [RFC2954] contains an
+ outdated email archive reference. The revised reference is as
+ follows:
+
+ OLD:
+
+ | Email Archive:
+ |
+ | ftp://ftp.ietf.org/ietf-mail-archive/frnetmib
+
+ NEW:
+
+ | Email Archive:
+ |
+ | https://www.ietf.org/ietf-ftp/ietf-mail-archive/frnetmib/
+
+3.5. RFC 2955
+
+ The CONTACT-INFO in the MIB in Section 4 of [RFC2955] contains an
+ outdated email archive reference. The revised reference is as
+ follows:
+
+ OLD:
+
+ | Email Archive:
+ |
+ | ftp://ftp.ietf.org/ietf-mail-archive/frnetmib
+
+ NEW:
+
+ | Email Archive:
+ |
+ | https://www.ietf.org/ietf-ftp/ietf-mail-archive/frnetmib/
+
+3.6. RFC 3020
+
+ The CONTACT-INFO in the MIB in Section 3 of [RFC3020] contains an
+ outdated email archive reference. The revised reference is as
+ follows:
+
+ OLD:
+
+ | Email Archive: ftp://ftp.ietf.org/ietf-mail-archive/frnetmib
+
+ NEW:
+
+ | Email Archive: https://www.ietf.org/ietf-ftp/ietf-mail-archive/
+ | frnetmib/
+
+3.7. RFC 3083
+
+ The CONTACT-INFO in the MIB in Section 4 of [RFC3083] contains an
+ outdated email archive reference. The revised reference is as
+ follows:
+
+ OLD:
+
+ | Archive: ftp://ftp.ietf.org/ietf-mail-archive/ipcdn
+
+ NEW:
+
+ | Archive: https://www.ietf.org/ietf-ftp/ietf-mail-archive/ipcdn/
+
+3.8. RFC 3201
+
+ The CONTACT-INFO in the MIB in Section 6 of [RFC3201] contains an
+ outdated email archive reference. The revised reference is as
+ follows:
+
+ OLD:
+
+ | Email Archive: ftp://ftp.ietf.org/ietf-mail-archive/frnetmib
+
+ NEW:
+
+ | Email Archive: https://www.ietf.org/ietf-ftp/ietf-mail-archive/
+ | frnetmib/
+
+3.9. RFC 3202
+
+ The CONTACT-INFO in the MIB in Section 7 of [RFC3202] contains an
+ outdated email archive reference. The revised reference is as
+ follows:
+
+ OLD:
+
+ | Email Archive: ftp://ftp.ietf.org/ietf-mail-archive/frnetmib
+
+ NEW:
+
+ | Email Archive: https://www.ietf.org/ietf-ftp/ietf-mail-archive/
+ | frnetmib/
+
+3.10. RFC 3295
+
+ The CONTACT-INFO in the MIB in Section 4 of [RFC3295] contains an
+ outdated email archive reference. The revised reference is as
+ follows:
+
+ OLD:
+
+ | Email Archive:
+ |
+ | ftp://ftp.ietf.org/ietf-mail-archive/gsmp/
+
+ NEW:
+
+ | Email Archive:
+ |
+ | https://www.ietf.org/ietf-ftp/ietf-mail-archive/gsmp/
+
+3.11. RFC 3684
+
+ Two informative references in Section 14.2 of [RFC3684] are updated
+ as follows:
+
+ OLD:
+
+ | [7] Ogier, R., Message in IETF email archive for MANET,
+ | ftp://ftp.ietf.org/ietf-mail-archive/manet/2002-02.mail, February
+ | 2002.
+
+ NEW:
+
+ | [7] Ogier, R., Message in IETF email archive for MANET,
+ | https://www.ietf.org/ietf-ftp/ietf-mail-archive/
+ | manet/2002-02.mail, February 2002.
+
+ OLD:
+
+ | [9] Ogier, R., Message in IETF email archive for MANET,
+ | ftp://ftp.ietf.org/ietf-mail-archive/manet/2002-03.mail, March
+ | 2002.
+
+ NEW:
+
+ | [9] Ogier, R., Message in IETF email archive for MANET,
+ | https://www.ietf.org/ietf-ftp/ietf-mail-archive/
+ | manet/2002-03.mail, March 2002.
+
+3.12. RFC 3962
+
+ An informative reference in [RFC3962] is updated as follows:
+
+ OLD:
+
+ | [LEACH] Leach, P., email to IETF Kerberos working group mailing
+ | list, 5 May 2003, ftp://ftp.ietf.org/ietf-mail-archive/krb-
+ | wg/2003-05.mail.
+
+ NEW:
+
+ | [LEACH] Leach, P., email to IETF Kerberos working group mailing
+ | list, 5 May 2003, https://www.ietf.org/ietf-ftp/ietf-mail-archive/
+ | krb-wg/2003-05.mail.
+
+3.13. RFC 3970
+
+ The CONTACT-INFO in the MIB in Section 5 of [RFC3970] contains an
+ outdated email archive reference. The revised reference is as
+ follows:
+
+ OLD:
+
+ | Archive: ftp://ops.ietf.org/pub/lists
+
+ NEW:
+
+ | Archive: https://www.ietf.org/ietf-ftp/concluded-wg-ietf-mail-
+ | archive/tewg/
+
+3.14. RFC 4036
+
+ The CONTACT-INFO in the MIB in Section 4 of [RFC4036] contains an
+ outdated email archive reference. The revised reference is as
+ follows:
+
+ OLD:
+
+ | Archive: ftp://ftp.ietf.org/ietf-mail-archive/ipcdn
+
+ NEW:
+
+ | Archive: https://www.ietf.org/ietf-ftp/ietf-mail-archive/ipcdn/
+
+3.15. RFC 4131
+
+ The CONTACT-INFO in the MIB in Section 3 of [RFC4131] contains an
+ outdated email archive reference. The revised reference is as
+ follows:
+
+ OLD:
+
+ | Archive: ftp://ftp.ietf.org/ietf-mail-archive/ipcdn.
+
+ NEW:
+
+ | Archive: https://www.ietf.org/ietf-ftp/ietf-mail-archive/ipcdn/.
+
+3.16. RFC 4251
+
+ An informative reference in [RFC4251] is updated as follows:
+
+ OLD:
+
+ | [DAI] Dai, W., "An attack against SSH2 protocol", Email to the
+ | SECSH Working Group ietf-ssh@netbsd.org ftp:// ftp.ietf.org/ietf-
+ | mail-archive/secsh/2002-02.mail, Feb 2002.
+
+ NEW:
+
+ | [DAI] Dai, W., "An attack against SSH2 protocol", Email to the
+ | SECSH Working Group ietf-ssh@netbsd.org https://www.ietf.org/ietf-
+ | ftp/ietf-mail-archive/ secsh/2002-02.mail, Feb 2002.
+
+3.17. RFC 4323
+
+ The CONTACT-INFO in the MIB in Section 5 of [RFC4323] contains an
+ outdated email archive reference. The revised reference is as
+ follows:
+
+ OLD:
+
+ | Archive: ftp://ftp.ietf.org/ietf-mail-archive/ipcdn
+
+ NEW:
+
+ | Archive: https://www.ietf.org/ietf-ftp/ietf-mail-archive/ipcdn/
+
+3.18. RFC 4546
+
+ The CONTACT-INFO in the MIB in Section 4 of [RFC4546] contains an
+ outdated email archive reference. The revised reference is as
+ follows:
+
+ OLD:
+
+ | Archive: ftp://ftp.ietf.org/ietf-mail-archive/ipcdn
+
+ NEW:
+
+ | Archive: https://www.ietf.org/ietf-ftp/ietf-mail-archive/ipcdn/
+
+3.19. RFC 4547
+
+ The CONTACT-INFO in the MIB in Section 4 of [RFC4547] contains an
+ outdated email archive reference. The revised reference is as
+ follows:
+
+ OLD:
+
+ | Archive: ftp://ftp.ietf.org/ietf-mail-archive/ipcdn
+
+ NEW:
+
+ | Archive: https://www.ietf.org/ietf-ftp/ietf-mail-archive/ipcdn/
+
+3.20. RFC 4639
+
+ The CONTACT-INFO in the MIB in Section 4 of [RFC4639] contains an
+ outdated email archive reference. The revised reference is as
+ follows:
+
+ OLD:
+
+ | Archive: ftp://ftp.ietf.org/ietf-mail-archive/ipcdn
+
+ NEW:
+
+ | Archive: https://www.ietf.org/ietf-ftp/ietf-mail-archive/ipcdn/
+
+3.21. RFC 4682
+
+ The CONTACT-INFO in the MIB in Section 4 of [RFC4682] contains an
+ outdated email archive reference. The revised reference is as
+ follows:
+
+ OLD:
+
+ | Archive: ftp://ftp.ietf.org/ietf-mail-archive/ipcdn
+
+ NEW:
+
+ | Archive: https://www.ietf.org/ietf-ftp/ietf-mail-archive/ipcdn/
+
+3.22. RFC 5098
+
+ The CONTACT-INFO in the MIB in Section 5 of [RFC5098] contains an
+ outdated email archive reference. The revised reference is as
+ follows:
+
+ OLD:
+
+ | Archive: ftp://ftp.ietf.org/ietf-mail-archive/ipcdn
+
+ NEW:
+
+ | Archive: https://www.ietf.org/ietf-ftp/ietf-mail-archive/ipcdn/
+
+3.23. RFC 5428
+
+ The CONTACT-INFO in the MIB in Section 6 of [RFC5428] contains an
+ outdated email archive reference. The revised reference is as
+ follows:
+
+ OLD:
+
+ | Archive: ftp://ftp.ietf.org/ietf-mail-archive/ipcdn
+
+ NEW:
+
+ | Archive: https://www.ietf.org/ietf-ftp/ietf-mail-archive/ipcdn/
+
+3.24. RFC 6756
+
+ Section 2.8.1 of [RFC6756] is updated as follows:
+
+ OLD:
+
+ | Current list and status of all IETF RFCs:
+ |
+ | ftp://ftp.ietf.org/rfc/rfc-index.txt
+ |
+ | Current list and description of all IETF Internet-Drafts:
+ |
+ | ftp://ftp.ietf.org/internet-drafts/1id-abstracts.txt
+
+ NEW:
+
+ | Current list and status of all IETF RFCs:
+ |
+ | https://www.rfc-editor.org/rfc/rfc-index.txt
+ |
+ | Current list and description of all IETF Internet-Drafts:
+ |
+ | https://www.ietf.org/id/1id-abstracts.txt
+
+3.25. RFC 7241
+
+ Appendix B.2 of [RFC7241] is updated as follows:
+
+ OLD:
+
+ | Current list and description of all IETF Internet-Drafts:
+ |
+ | <ftp://ftp.ietf.org/internet-drafts/1id-abstracts.txt>
+
+ NEW:
+
+ | Current list and description of all IETF Internet-Drafts:
+ |
+ | <https://www.ietf.org/id/1id-abstracts.txt>
+
+3.26. Generic Guidance
+
+ If any other RFC not explicitly mentioned in an earlier section
+ contains a reference of the form "ftp://ftp.ietf.org/<path>", the
+ reference MUST be replaced with a URI of the form
+ "https://www.ietf.org/ietf-ftp/<path>".
+
+4. Security Considerations
+
+ This document does not alter the security considerations of the
+ updated documents.
+
+ This document replaces URIs to the IETF infrastructure that use an
+ FTP scheme with equivalent HTTPS scheme URIs. These updates ensure
+ the continued availability of content referenced in previously
+ published RFCs when the IETF FTP service is retired. Additionally,
+ the replacement of the cleartext FTP with HTTPS will ensure that
+ resources on the IETF infrastructure can be accessed in a more secure
+ way. For example, HTTPS provides an encrypted channel that includes
+ protections, such as verifying the server's identity per the
+ certificate verification behavior of the client and integrity and
+ confidentiality protection commensurate with the negotiated TLS
+ protocol version and ciphersuite.
+
+5. IANA Considerations
+
+ This document has no IANA actions.
+
+6. References
+
+6.1. Normative References
+
+ [RFC2077] Nelson, S., Parks, C., and M. Ardron, "The Model Primary
+ Content Type for Multipurpose Internet Mail Extensions",
+ RFC 2077, DOI 10.17487/RFC2077, January 1997,
+ <https://www.rfc-editor.org/info/rfc2077>.
+
+ [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
+ Requirement Levels", BCP 14, RFC 2119,
+ DOI 10.17487/RFC2119, March 1997,
+ <https://www.rfc-editor.org/info/rfc2119>.
+
+ [RFC2418] Bradner, S., "IETF Working Group Guidelines and
+ Procedures", BCP 25, RFC 2418, DOI 10.17487/RFC2418,
+ September 1998, <https://www.rfc-editor.org/info/rfc2418>.
+
+ [RFC2648] Moats, R., "A URN Namespace for IETF Documents", RFC 2648,
+ DOI 10.17487/RFC2648, August 1999,
+ <https://www.rfc-editor.org/info/rfc2648>.
+
+ [RFC2954] Rehbehn, K. and D. Fowler, "Definitions of Managed Objects
+ for Frame Relay Service", RFC 2954, DOI 10.17487/RFC2954,
+ October 2000, <https://www.rfc-editor.org/info/rfc2954>.
+
+ [RFC2955] Rehbehn, K., Nicklass, O., and G. Mouradian, "Definitions
+ of Managed Objects for Monitoring and Controlling the
+ Frame Relay/ATM PVC Service Interworking Function",
+ RFC 2955, DOI 10.17487/RFC2955, October 2000,
+ <https://www.rfc-editor.org/info/rfc2955>.
+
+ [RFC3020] Pate, P., Lynch, B., and K. Rehbehn, "Definitions of
+ Managed Objects for Monitoring and Controlling the UNI/NNI
+ Multilink Frame Relay Function", RFC 3020,
+ DOI 10.17487/RFC3020, December 2000,
+ <https://www.rfc-editor.org/info/rfc3020>.
+
+ [RFC3083] Woundy, R., "Baseline Privacy Interface Management
+ Information Base for DOCSIS Compliant Cable Modems and
+ Cable Modem Termination Systems", RFC 3083,
+ DOI 10.17487/RFC3083, March 2001,
+ <https://www.rfc-editor.org/info/rfc3083>.
+
+ [RFC3201] Steinberger, R. and O. Nicklass, "Definitions of Managed
+ Objects for Circuit to Interface Translation", RFC 3201,
+ DOI 10.17487/RFC3201, January 2002,
+ <https://www.rfc-editor.org/info/rfc3201>.
+
+ [RFC3202] Steinberger, R. and O. Nicklass, "Definitions of Managed
+ Objects for Frame Relay Service Level Definitions",
+ RFC 3202, DOI 10.17487/RFC3202, January 2002,
+ <https://www.rfc-editor.org/info/rfc3202>.
+
+ [RFC3295] Sjostrand, H., Buerkle, J., and B. Srinivasan,
+ "Definitions of Managed Objects for the General Switch
+ Management Protocol (GSMP)", RFC 3295,
+ DOI 10.17487/RFC3295, June 2002,
+ <https://www.rfc-editor.org/info/rfc3295>.
+
+ [RFC3684] Ogier, R., Templin, F., and M. Lewis, "Topology
+ Dissemination Based on Reverse-Path Forwarding (TBRPF)",
+ RFC 3684, DOI 10.17487/RFC3684, February 2004,
+ <https://www.rfc-editor.org/info/rfc3684>.
+
+ [RFC3962] Raeburn, K., "Advanced Encryption Standard (AES)
+ Encryption for Kerberos 5", RFC 3962,
+ DOI 10.17487/RFC3962, February 2005,
+ <https://www.rfc-editor.org/info/rfc3962>.
+
+ [RFC3970] Kompella, K., "A Traffic Engineering (TE) MIB", RFC 3970,
+ DOI 10.17487/RFC3970, January 2005,
+ <https://www.rfc-editor.org/info/rfc3970>.
+
+ [RFC4036] Sawyer, W., "Management Information Base for Data Over
+ Cable Service Interface Specification (DOCSIS) Cable Modem
+ Termination Systems for Subscriber Management", RFC 4036,
+ DOI 10.17487/RFC4036, April 2005,
+ <https://www.rfc-editor.org/info/rfc4036>.
+
+ [RFC4131] Green, S., Ozawa, K., Cardona, E., Ed., and A. Katsnelson,
+ "Management Information Base for Data Over Cable Service
+ Interface Specification (DOCSIS) Cable Modems and Cable
+ Modem Termination Systems for Baseline Privacy Plus",
+ RFC 4131, DOI 10.17487/RFC4131, September 2005,
+ <https://www.rfc-editor.org/info/rfc4131>.
+
+ [RFC4251] Ylonen, T. and C. Lonvick, Ed., "The Secure Shell (SSH)
+ Protocol Architecture", RFC 4251, DOI 10.17487/RFC4251,
+ January 2006, <https://www.rfc-editor.org/info/rfc4251>.
+
+ [RFC4323] Patrick, M. and W. Murwin, "Data Over Cable System
+ Interface Specification Quality of Service Management
+ Information Base (DOCSIS-QoS MIB)", RFC 4323,
+ DOI 10.17487/RFC4323, January 2006,
+ <https://www.rfc-editor.org/info/rfc4323>.
+
+ [RFC4546] Raftus, D. and E. Cardona, "Radio Frequency (RF) Interface
+ Management Information Base for Data over Cable Service
+ Interface Specifications (DOCSIS) 2.0 Compliant RF
+ Interfaces", RFC 4546, DOI 10.17487/RFC4546, June 2006,
+ <https://www.rfc-editor.org/info/rfc4546>.
+
+ [RFC4547] Ahmad, A. and G. Nakanishi, "Event Notification Management
+ Information Base for Data over Cable Service Interface
+ Specifications (DOCSIS)-Compliant Cable Modems and Cable
+ Modem Termination Systems", RFC 4547,
+ DOI 10.17487/RFC4547, June 2006,
+ <https://www.rfc-editor.org/info/rfc4547>.
+
+ [RFC4639] Woundy, R. and K. Marez, "Cable Device Management
+ Information Base for Data-Over-Cable Service Interface
+ Specification (DOCSIS) Compliant Cable Modems and Cable
+ Modem Termination Systems", RFC 4639,
+ DOI 10.17487/RFC4639, December 2006,
+ <https://www.rfc-editor.org/info/rfc4639>.
+
+ [RFC4682] Nechamkin, E. and J-F. Mule, "Multimedia Terminal Adapter
+ (MTA) Management Information Base for PacketCable- and
+ IPCablecom-Compliant Devices", RFC 4682,
+ DOI 10.17487/RFC4682, December 2006,
+ <https://www.rfc-editor.org/info/rfc4682>.
+
+ [RFC5098] Beacham, G., Kumar, S., and S. Channabasappa, "Signaling
+ MIB for PacketCable and IPCablecom Multimedia Terminal
+ Adapters (MTAs)", RFC 5098, DOI 10.17487/RFC5098, February
+ 2008, <https://www.rfc-editor.org/info/rfc5098>.
+
+ [RFC5428] Channabasappa, S., De Ketelaere, W., and E. Nechamkin,
+ "Management Event Management Information Base (MIB) for
+ PacketCable- and IPCablecom-Compliant Devices", RFC 5428,
+ DOI 10.17487/RFC5428, April 2009,
+ <https://www.rfc-editor.org/info/rfc5428>.
+
+ [RFC6756] Trowbridge, S., Ed., Lear, E., Ed., Fishman, G., Ed., and
+ S. Bradner, Ed., "Internet Engineering Task Force and
+ International Telecommunication Union - Telecommunication
+ Standardization Sector Collaboration Guidelines",
+ RFC 6756, DOI 10.17487/RFC6756, September 2012,
+ <https://www.rfc-editor.org/info/rfc6756>.
+
+ [RFC7241] Dawkins, S., Thaler, P., Romascanu, D., and B. Aboba, Ed.,
+ "The IEEE 802/IETF Relationship", RFC 7241,
+ DOI 10.17487/RFC7241, July 2014,
+ <https://www.rfc-editor.org/info/rfc7241>.
+
+ [RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
+ 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
+ May 2017, <https://www.rfc-editor.org/info/rfc8174>.
+
+6.2. Informative References
+
+ [FTP-RETIREMENT]
+ Danyliw, R., "Retirement of the IETF FTP Service", message
+ to the IETF mailing list, 3 March 2021,
+ <https://mailarchive.ietf.org/arch/msg/ietf/vi-
+ 8bFqlgBFjB2jJ1SIAGHiNRdg/>.
+
+ [FTP-RETIREMENT-PLAN]
+ "Retiring the IETF FTP Service (Revised Plan)", March
+ 2021, <https://www.ietf.org/media/documents/Revised-
+ Retiring-IETF-FTP-Service-2021-03.pdf>.
+
+Acknowledgments
+
+ Thank you to Robert Sparks, Glen Barney, Henrik Levkowetz, and Russ
+ Housley on the IETF Tools Team for the operations and maintenance
+ information that informed the community discussion at
+ [FTP-RETIREMENT].
+
+ Additionally, thank you to Brian Carpenter, Martin Duke, Russ
+ Housley, Benjamin Kaduk, Eric Kline, Murray Kucherawy, Mirja
+ Kühlewind, Scott Mansfield, Tom Petch, John Scudder, and Rob Wilton
+ for their valuable feedback and reviews of the specific document
+ updates.
+
+ Finally, thank you to Éric Vyncke for the sponsoring this document
+ and the AD review.
+
+Author's Address
+
+ Roman Danyliw
+ Software Engineering Institute
+
+ Email: rdd@cert.org