Source Ports in ARF Reports
draft-kucherawy-marf-source-ports-01

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Authors Richard Clayton , Murray Kucherawy 
Last updated 2012-04-18
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Individual submission                                         R. Clayton
Internet-Draft                                   University of Cambridge
Updates: 5965, 6591 (if approved)                           M. Kucherawy
Intended status: Standards Track                         Cloudmark, Inc.
Expires: October 20, 2012                                 April 18, 2012

                      Source Ports in ARF Reports
                  draft-kucherawy-marf-source-ports-01

Abstract

   This document registers an additional header field for use in Abuse
   Reporting Format reports to permit the identification of the source
   port of the connection involved in an abuse incident.

   This memo updates RFC5965 and RFC6591.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on October 20, 2012.

Copyright Notice

   Copyright (c) 2012 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
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   the Trust Legal Provisions and are provided without warranty as

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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . 3
   2.  Keywords  . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
   3.  Source-Port Field Definition  . . . . . . . . . . . . . . . . . 3
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 3
   5.  Security Considerations . . . . . . . . . . . . . . . . . . . . 4
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . . . 4
     6.1.  Normative References  . . . . . . . . . . . . . . . . . . . 4
     6.2.  Informative References  . . . . . . . . . . . . . . . . . . 4
   Appendix A.  Acknowledgements . . . . . . . . . . . . . . . . . . . 5

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1.  Introduction

   [ARF] defined the Abuse Reporting Format, a new header message format
   for use in reporting incidents of email abuse.  It was extended by
   [I-D.IETF-MARF-AUTHFAILURE-REPORT] to enable reporting of email
   authentication failures.  Although those specifications gave the
   capability to include the source IP address in the report, the source
   port was not included.  As explained in [LOG], the deployment of IP
   sharing techniques means it can now be essential to include source
   port values in reports if unambiguous identification of the origin of
   abuse is to be achieved.

   Accordingly, this memo registers an ARF reporting field to contain
   this information and provides guidance for its use.

2.  Keywords

   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 [KEYWORDS].

3.  Source-Port Field Definition

   A new ARF reporting field called "Source-Port" is defined.  When
   present in a report, it MUST contain the TCP or UDP source port
   matching the "Source-IP" field in the same report, thereby describing
   completely the origin of the abuse incident.

   Per, [ABNF], the formal syntax is:

     source-port = "Source-Port:" [CFWS] 1*DIGIT [CFWS] CRLF

   "CFWS" is imported from [MAIL].

   When any report is generated that includes the "Source-IP" reporting
   field, this field SHOULD also be present.

4.  IANA Considerations

   IANA is requested to add the following entry to the Feedback Report
   Header Fields registry:

   Field Name:  Source-Port

   Description:  TCP or UDP source port from which the reported
      connection originated

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   Multiple Appearances:  No

   Related Feedback-Type:  any

   Reference:  [this memo]

   Status:  current

5.  Security Considerations

   This extension introduces no new security considerations not already
   covered in [ARF].

6.  References

6.1.  Normative References

   [ABNF]                              Crocker, D. and P. Overell,
                                       "Augmented BNF for Syntax
                                       Specifications: ABNF", STD 68,
                                       RFC 5234, January 2008.

   [ARF]                               Shafranovich, Y., Levine, J., and
                                       M. Kucherawy, "An Extensible
                                       Format for Email Feedback
                                       Reports", RFC 5965, August 2010.

   [I-D.IETF-MARF-AUTHFAILURE-REPORT]  Fontana, H., "Authentication
                                       Failure Reporting using the Abuse
                                       Report Format", I-D draft-ietf-
                                       marf-authfailure-report,
                                       January 2012.

   [KEYWORDS]                          Bradner, S., "Key words for use
                                       in RFCs to Indicate Requirement
                                       Levels", BCP 14, RFC 2119,
                                       March 1997.

   [MAIL]                              Resnick, P., Ed., "Internet
                                       Message Format", RFC 5322,
                                       October 2008.

6.2.  Informative References

   [LOG]                               Durand, A., Gashinsky, I., Lee,
                                       D., and S. Sheppard, "Logging
                                       Recommendations for  Internet-
                                       Facing Servers", RFC 6302,

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                                       June 2011.

Appendix A.  Acknowledgements

   The authors wish to acknowledge the following for their review and
   constructive criticism of this proposal: (names)

   The idea for this work originated within the Messaging Anti-Abuse
   Working Group (MAAWG).

Authors' Addresses

   Richard Clayton
   University of Cambridge
   Computer Laboratory
   JJ Thomson Avenue
   Cambridge  CB3 0FD
   United Kingdom

   Phone: +44 1223 763570
   EMail: richard.clayton@cl.cam.ac.uk

   Murray S. Kucherawy
   Cloudmark, Inc.
   128 King St., 2nd Floor
   San Francisco, CA  94107
   US

   Phone: +1 415 946 3800
   EMail: msk@cloudmark.com

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