DTLS as a Transport Layer for RADIUS

The information below is for an old version of the document
Document Type Expired Internet-Draft (radext WG)
Author Alan DeKok 
Last updated 2010-10-12 (latest revision 2010-10-08)
Stream Internet Engineering Task Force (IETF)
Expired & archived
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Stream WG state WG Document
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The RADIUS protocol [RFC2865] has limited support for authentication and encryption of RADIUS packets. The protocol transports data "in the clear", although some parts of the packets can have "hidden" content. Packets may be replayed verbatim by an attacker, and client-server authentication is based on fixed shared secrets. This document specifies how the Datagram Transport Layer Security (DTLS) protocol may be used as a fix for these problems. It also describes how implementations of this proposal can co-exist with current RADIUS systems.


Alan DeKok (aland@freeradius.org)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)