Remote Authentication Dial In User Service (RADIUS)
RFC 2138
| Document | Type |
RFC - Proposed Standard
(April 1997; No errata)
Obsoleted by RFC 2865
Obsoletes RFC 2058
|
|
|---|---|---|---|
| Last updated | 2013-03-02 | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 2138 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | (None) | ||
| Send notices to | (None) | ||
Network Working Group C. Rigney
Request for Comments: 2138 Livingston
Obsoletes: 2058 A. Rubens
Category: Standards Track Merit
W. Simpson
Daydreamer
S. Willens
Livingston
April 1997
Remote Authentication Dial In User Service (RADIUS)
Status of this Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Abstract
This document describes a protocol for carrying authentication,
authorization, and configuration information between a Network Access
Server which desires to authenticate its links and a shared
Authentication Server.
Implementation Note
This memo documents the RADIUS protocol. There has been some
confusion in the assignment of port numbers for this protocol. The
early deployment of RADIUS was done using the erroneously chosen port
number 1645, which conflicts with the "datametrics" service. The
officially assigned port number for RADIUS is 1812.
Table of Contents
1. Introduction .......................................... 3
1.1 Specification of Requirements ................... 4
1.2 Terminology ..................................... 5
2. Operation ............................................. 5
2.1 Challenge/Response .............................. 7
2.2 Interoperation with PAP and CHAP ................ 7
2.3 Why UDP? ........................................ 8
3. Packet Format ......................................... 10
4. Packet Types .......................................... 13
4.1 Access-Request .................................. 13
Rigney, et. al. Standards Track [Page 1]
RFC 2138 RADIUS April 1997
4.2 Access-Accept ................................... 14
4.3 Access-Reject ................................... 15
4.4 Access-Challenge ................................ 17
5. Attributes ............................................ 18
5.1 User-Name ....................................... 21
5.2 User-Password ................................... 22
5.3 CHAP-Password ................................... 23
5.4 NAS-IP-Address .................................. 24
5.5 NAS-Port ........................................ 25
5.6 Service-Type .................................... 26
5.7 Framed-Protocol ................................. 28
5.8 Framed-IP-Address ............................... 29
5.9 Framed-IP-Netmask ............................... 29
5.10 Framed-Routing .................................. 30
5.11 Filter-Id ....................................... 31
5.12 Framed-MTU ...................................... 32
5.13 Framed-Compression .............................. 33
5.14 Login-IP-Host ................................... 33
5.15 Login-Service ................................... 34
5.16 Login-TCP-Port .................................. 35
5.17 (unassigned) .................................... 36
5.18 Reply-Message ................................... 36
5.19 Callback-Number ................................. 37
5.20 Callback-Id ..................................... 38
5.21 (unassigned) .................................... 38
5.22 Framed-Route .................................... 39
5.23 Framed-IPX-Network .............................. 40
5.24 State ........................................... 40
5.25 Class ........................................... 41
5.26 Vendor-Specific ................................. 42
5.27 Session-Timeout ................................. 44
5.28 Idle-Timeout .................................... 44
5.29 Termination-Action .............................. 45
5.30 Called-Station-Id ............................... 46
5.31 Calling-Station-Id .............................. 47
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