6tisch Working Group M. Richardson
Internet-Draft Sandelman Software Works
Intended status: Informational J. Latour
Expires: September 12, 2019 CIRA Labs
F. Khan
Twelve Dot Systems
March 11, 2019

MUD processing and extensions for Secure Home Gateway Project


This document details the mechanism used by the CIRA Secure Home Gateway and CIRA MUD integration server to return MUD artifacts to participating gateway systems.

The work in [I-D.ietf-opsawg-mud] creates a relationship between a device's manufacturer and a border gateway that may need to enforce policy. This document ads an additional relationship to a service provider, trusted by the border gateway to enhance or modify the stated security policy.

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 https://datatracker.ietf.org/drafts/current/.

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This Internet-Draft will expire on September 12, 2019.

Copyright Notice

Copyright (c) 2019 IETF Trust and the persons identified as the document authors. All rights reserved.

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Table of Contents

1. Introduction

This document details how the CIRALabs Secure Home Gateway uses MUD files.

[I-D.richardson-shg-mud-quarantined-access] details an extension to mark certain ACLs as providing firmware update access.

The second issue addressed by the document is the question of whether and when the MUD file should be specific to a specific version of the device firmware.

The third issue is that an intermediary (ISP, or third-party security service) may want to extend or amend a MUD file received from a manufacturer. In order to maintain an audit trail of changes, a way to encode the previous MUD URL and signature file (and status) is provided.

2. Terminology

The major new term, compared to the MUD document is the term

a device which has shown behaviour forbidden by a MUD file ACL, and has subsequently been denied further access to the network.

3. Requirements Language

In this document, the key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" are to be interpreted as described in BCP 14, RFC 2119 [RFC2119] and indicate requirement levels for compliant STuPiD implementations.

4. Security Considerations


5. IANA Considerations


6. Acknowledgements

This work was supported by the Canadian Internet Registration Authority (cira.ca).

7. Normative References

[I-D.ietf-opsawg-mud] Lear, E., Droms, R. and D. Romascanu, "Manufacturer Usage Description Specification", Internet-Draft draft-ietf-opsawg-mud-25, June 2018.
[I-D.richardson-shg-mud-quarantined-access] Richardson, M., "Manufacturer Usuage Description for quarantined access to firmware", Internet-Draft draft-richardson-shg-mud-quarantined-access-00, January 2019.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997.

Authors' Addresses

Michael Richardson Sandelman Software Works EMail: mcr+ietf@sandelman.ca
Jacques Latour CIRA Labs EMail: Jacques.Latour@cira.ca
Faud Khan Twelve Dot Systems EMail: faud.khan@twelvedot.com