The TACACS+ Protocol
draft-ietf-opsawg-tacacs-06

Document Type Active Internet-Draft (opsawg WG)
Last updated 2017-05-07 (latest revision 2017-02-18)
Replaces draft-dahm-opsawg-tacacs
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Send notices to opsawg-chairs@ietf.org
Operations                                                       T. Dahm
Internet-Draft                                                    A. Ota
Intended status: Informational                                Google Inc
Expires: August 22, 2017                                  D. Medway Gash
                                                     Cisco Systems, Inc.
                                                               D. Carrel
                                                           vIPtela, Inc.
                                                                L. Grant
                                                       February 18, 2017

                          The TACACS+ Protocol
                      draft-ietf-opsawg-tacacs-06

Abstract

   TACACS+ provides Device Administration for routers, network access
   servers and other networked computing devices via one or more
   centralized servers.  This document describes the protocol that is
   used by TACACS+.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on August 22, 2017.

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   Copyright (c) 2017 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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   (http://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

Dahm, et al.             Expires August 22, 2017                [Page 1]
Internet-Draft            The TACACS+ Protocol             February 2017

   to this document.  Code Components extracted from this document must
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   This document may contain material from IETF Documents or IETF
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   than English.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Technical Definitions . . . . . . . . . . . . . . . . . . . .   4
   3.  TACACS+ Connections and Sessions  . . . . . . . . . . . . . .   4
     3.1.  Connection  . . . . . . . . . . . . . . . . . . . . . . .   4
     3.2.  Session . . . . . . . . . . . . . . . . . . . . . . . . .   4
     3.3.  Single Connect Mode . . . . . . . . . . . . . . . . . . .   5
     3.4.  Session Completion  . . . . . . . . . . . . . . . . . . .   5
     3.5.  Treatment of Enumerated Protocol Values . . . . . . . . .   6
     3.6.  Text Encoding . . . . . . . . . . . . . . . . . . . . . .   7
     3.7.  Data Obfuscation  . . . . . . . . . . . . . . . . . . . .   7
     3.8.  The TACACS+ Packet Header . . . . . . . . . . . . . . . .   9
     3.9.  The TACACS+ Packet Body . . . . . . . . . . . . . . . . .  11
   4.  Authentication  . . . . . . . . . . . . . . . . . . . . . . .  11
     4.1.  The Authentication START Packet Body  . . . . . . . . . .  11
     4.2.  The Authentication REPLY Packet Body  . . . . . . . . . .  14
     4.3.  The Authentication CONTINUE Packet Body . . . . . . . . .  15
     4.4.  Description of Authentication Process . . . . . . . . . .  16
       4.4.1.  Version Behaviour . . . . . . . . . . . . . . . . . .  17
       4.4.2.  Common Authentication Flows . . . . . . . . . . . . .  17
       4.4.3.  Aborting an Authentication Session  . . . . . . . . .  21
   5.  Authorization . . . . . . . . . . . . . . . . . . . . . . . .  22
     5.1.  The Authorization REQUEST Packet Body . . . . . . . . . .  23
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