Internet Engineering Task Force (IETF) S. Winter
Request for Comments: 6614 RESTENA
Category: Experimental M. McCauley
ISSN: 2070-1721 OSC
S. Venaas
K. Wierenga
Cisco
May 2012
Transport Layer Security (TLS) Encryption for RADIUS
Abstract
This document specifies a transport profile for RADIUS using
Transport Layer Security (TLS) over TCP as the transport protocol.
This enables dynamic trust relationships between RADIUS servers.
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for examination, experimental implementation, and
evaluation.
This document defines an Experimental Protocol for the Internet
community. 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). Not
all documents approved by the IESG are a candidate for any level of
Internet Standard; see Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc6614.
Winter, et al. Experimental [Page 1]RFC 6614 RADIUS over TLS May 2012Copyright 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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Table of Contents
1. Introduction ....................................................3
1.1. Requirements Language ......................................3
1.2. Terminology ................................................4
1.3. Document Status ............................................4
2. Normative: Transport Layer Security for RADIUS/TCP ..............5
2.1. TCP port and Packet Types ..................................5
2.2. TLS Negotiation ............................................5
2.3. Connection Setup ...........................................5
2.4. Connecting Client Identity .................................7
2.5. RADIUS Datagrams ...........................................8
3. Informative: Design Decisions ..................................10
3.1. Implications of Dynamic Peer Discovery ....................10
3.2. X.509 Certificate Considerations ..........................10
3.3. Ciphersuites and Compression Negotiation Considerations ...11
3.4. RADIUS Datagram Considerations ............................11
4. Compatibility with Other RADIUS Transports .....................12
5. Diameter Compatibility .........................................13
6. Security Considerations ........................................13
7. IANA Considerations ............................................14
8. Acknowledgements ...............................................15
9. References .....................................................15
9.1. Normative References ......................................15
9.2. Informative References ....................................16
Appendix A. Implementation Overview: Radiator .....................18
Appendix B. Implementation Overview: radsecproxy ..................19
Appendix C. Assessment of Crypto-Agility Requirements .............20
Winter, et al. Experimental [Page 2]RFC 6614 RADIUS over TLS May 20121. Introduction
The RADIUS protocol [RFC2865] is a widely deployed authentication and
authorization protocol. The supplementary RADIUS Accounting
specification [RFC2866] provides accounting mechanisms, thus
datatracker.ietf.org