Radius
https://ja.wikipedia.org/wiki/RADIUS
「このページは著作権侵害のおそれが指摘されており、事実関係の調査が依頼されています。」

転載元はよく知らない。 IETFのRFC(request for commnet)だけからの理解をするために、まずRFCを読む

読む目的によって、全部読むか、全部に加えてそれぞれのRFCで参照しているRFCも全部読むか、現在有効な文書だけ読むか、現在重要な文書だけ読むかの4種類を想定

＜この項は書きかけです。順次追記します。＞

重要な文書だけ読む

RADIUSの著名な書籍を読み、その参考文献、引用しているRFCだけ読む。
この方法だと、今回の目的のうち、RFCだけから理解するという作業にならなくなってしまう。

現在有効な文書だけ読む

下記検索結果からObsolatedとなっているもの以外を読む。
ここから始める。

まず、表題にRADIUSの文字があるものだけ最初に読む(1)。

RFC editor search
https://www.rfc-editor.org/search/rfc_search.php

読んだものからURLをつける。

少し作業を進めてみると、
RFC2865,2866, 2867, 2868, 2869の5文書が中核文書だと思ってもいいかもしれない。

もし、構造が変わるのであれば、前の文書をObsolateして、新しい文書番号をつけるはずだから。
（どんどん新しい文書にしていくものと、古い文書を大切にしてUpdateするものもあるかもしれず、かならずしも新番号がつかなければ中核とは限らないかもしれない。）

Radius RFCを全部読む

RFC Editor Searchで、Rasiusで検索した結果が下記。
他の通信規約の場合に、略称が全く出てこない文章もあったような気がする。
全部読む過程で、関連文書、変更文書などが、この一覧にないかを確認する。

Radius RFCで参照しているRFCも読む

ReferenceのRFCを理解していないと、本質的な事項がわからないかもしれない。

例えば、
[4] Postel, J., "User Datagram Protocol", STD 6, RFC 768, August 1980.
はTCPと共存する通信規約で重要である。TCPの上で動くか、UDPの上で動くかで、上の規約の特徴が生きるかどうかがかかっている本質的な参照と、部分的な調整上で参照しているRFCでは必読度が違うかもしれない。
今回は、参照通信規約の重み付けは行なっていない。（重要度を評価するほど理解していない）

参考資料(reference)

RADIUSプロトコル概要
https://qiita.com/noppe78/items/2fb87f45200ad09195ec

シングル構成のRADIUSサーバを、HA環境に移行した時のメモ
https://qiita.com/nagase/items/8316e02f16acf4567326

SoftEther + (Radius + Google-Authenticator) でMFA認証VPN
https://qiita.com/m0559reen/items/87d86968f5cc36fbff1c

OneLoginのRADIUSを使ってAWS WorkSpacesのMFAを実現したときに詰まったところ
https://qiita.com/14kw/items/f2b7790a57b06e292810

Cisco WLC と FreeRADIUS を利用した EAP-TLS認証
https://qiita.com/haruca_tech/items/a9cf4a9168f325e65513

FreeRADIUS
https://qiita.com/eiuemura/items/3dcad222a9a295359b10

EC2上にRADIUSサーバを構築する手順
https://qiita.com/tokino/items/e9e17ec6f253e86bff4e

一覧(list)

Best Current Practice: B.C.P.
Draft Standard: D.S.
Experimental: Exp.
Informational: Inf.
Proposed Standard: P.S.

RFC 2865

Remote Authentication Dial In User Service (RADIUS) https://www.rfc-editor.org/rfc/rfc2865.txt C. Rigney, S. Willens, A. Rubens, W. Simpson June 2000 Errata, Obsoletes RFC 2138, Updated by RFC 2868, RFC 3575, RFC 5080, RFC 6929, RFC 8044 Draft Standard

References

[1] Rigney, C., Rubens, A., Simpson, W. and S. Willens, "Remote Authentication Dial In User Service (RADIUS)", RFC 2138, April 1997.
[2] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March, 1997.
[3] Rivest, R. and S. Dusse, "The MD5 Message-Digest Algorithm", RFC 1321, April 1992.
[4] Postel, J., "User Datagram Protocol", STD 6, RFC 768, August 1980.
[5] Rigney, C., "RADIUS Accounting", RFC 2866, June 2000.
[6] Reynolds, J. and J. Postel, "Assigned Numbers", STD 2, RFC 1700, October 1994.
[7] Yergeau, F., "UTF-8, a transformation format of ISO 10646", RFC 2279, January 1998.
[8] Aboba, B. and M. Beadles, "The Network Access Identifier", RFC 2486, January 1999.
[9] Kaufman, C., Perlman, R., and Speciner, M., "Network Security: Private Communications in a Public World", Prentice Hall, March 1995, ISBN 0-13-061466-1.
[10] Jacobson, V., "Compressing TCP/IP headers for low-speed serial links", RFC 1144, February 1990.
[11] ISO 8859. International Standard -- Information Processing -- 8-bit Single-Byte Coded Graphic Character Sets -- Part 1: Latin Alphabet No. 1, ISO 8859-1:1987.
[12] Sklower, K., Lloyd, B., McGregor, G., Carr, D. and T. Coradetti, "The PPP Multilink Protocol (MP)", RFC 1990, August 1996.
[13] Alvestrand, H. and T. Narten, "Guidelines for Writing an IANA Considerations Section in RFCs", BCP 26, RFC 2434, October 1998.
[14] Galvin, J., McCloghrie, K. and J. Davin, "SNMP Security Protocols", RFC 1352, July 1992.
[15] Dobbertin, H., "The Status of MD5 After a Recent Attack", CryptoBytes Vol.2 No.2, Summer 1996.

RFC 2866

RFC 2866 RADIUS Accounting https://www.rfc-editor.org/rfc/rfc2866.txt C. Rigney June 2000Errata, Obsoletes RFC 2139, Updated by RFC 2867, RFC 5080, RFC 5997 Informational

References

[1] Rigney, C., "RADIUS Accounting", RFC 2139, April 1997.
[2] Rigney, C., Willens, S., Rubens, A. and W. Simpson, "Remote Authentication Dial In User Service (RADIUS)", RFC 2865, June 2000.
[3] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March, 1997.
[4] Postel, J., "User Datagram Protocol", STD 6, RFC 768, August 1980.
[5] Rivest, R. and S. Dusse, "The MD5 Message-Digest Algorithm", RFC1321, April 1992.
[6] Reynolds, J. and J. Postel, "Assigned Numbers", STD 2, RFC 1700, October 1994.
[7] Yergeau, F., "UTF-8, a transformation format of ISO 10646", RFC2279, January 1998.
[8] Alvestrand, H. and T. Narten, "Guidelines for Writing an IANA Considerations Section in RFCs", BCP 26, RFC 2434, October 1998.

RFC 2867

RFC 2867 RADIUS Accounting Modifications for Tunnel Protocol Supporthttps://www.rfc-editor.org/rfc/rfc2867.txt G. Zorn, B. Aboba, D. Mitton June 2000 Errata, Updates RFC 2866 Inf.

References

[1] Rigney, C., "RADIUS Accounting", RFC 2866, June 2000.
[2] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997.
[3] Zorn, G., Leifer, D., Rubens, A., Shriver, J., Holdrege, M. and I. Goyret, "RADIUS Attributes for Tunnel Protocol Support", RFC 2868, June 2000.
[4] Townsley, W., Valencia, A., Rubens, A., Pall, G., Zorn, G. and B. Palter, "Layer Two Tunneling Protocol "L2TP"", RFC 2661, August 1999.
[5] Hamzeh, K., Pall, G., Verthein, W., Taarud, J., Little, W. and G. Zorn, "Point-to-Point Tunneling Protocol (PPTP)", RFC 2637, July 1999.

RFC 2868

RFC2868 RADIUS Attributes for Tunnel Protocol Support https://www.rfc-editor.org/rfc/rfc2868.txt| G. Zorn, D. Leifer, A. Rubens, J. Shriver, M. Holdrege, I. Goyret June 2000 Errata, Updates RFC 2865, Updated by RFC 3575 Inf.

References

[1] Hamzeh, K., Pall, G., Verthein, W., Taarud, J., Little, W. and G. Zorn, "Point-to-Point Tunneling Protocol (PPTP)", RFC 2637, July 1999.
[2] Valencia, A., Littlewood, M. and T. Kolar, T., "Cisco Layer Two Forwarding (Protocol) 'L2F'", RFC 2341, May 1998.
[3] Townsley, W., Valencia, A., Rubens, A., Pall, G., Zorn, G. and B. Palter, "Layer Two Tunnelling Protocol (L2TP)", RFC 2661, August 1999.
[4] Hamzeh, K., "Ascend Tunnel Management Protocol - ATMP", RFC 2107, February 1997.
[5] Kent, S. and R. Atkinson, "Security Architecture for the Internet Protocol", RFC 2401, November 1998.
[6] Perkins, C., "IP Encapsulation within IP", RFC 2003, October 1996.
[7] Perkins, C., "Minimal Encapsulation within IP", RFC 2004, October 1996.
[8] Atkinson, R., "IP Encapsulating Security Payload (ESP)", RFC 1827, August 1995.
[9] Hanks, S., Li, T., Farinacci, D. and P. Traina, "Generic Routing Encapsulation (GRE)", RFC 1701, October 1994.
[10] Simpson, W., "IP in IP Tunneling", RFC 1853, October 1995.
[11] Zorn, G. and D. Mitton, "RADIUS Accounting Modifications for Tunnel Protocol Support", RFC 2867, June 2000.
[12] Rigney, C., Willens, S., Rubens, A. and W. Simpson, "Remote Authentication Dial in User Service (RADIUS)", RFC 2865, June 2000.
[13] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997.
[14] Reynolds, J. and J. Postel, "Assigned Numbers", STD 2, RFC 1700, October 1994.
[15] Rigney, C., Willats, W. and P. Calhoun, "RADIUS Extensions", RFC 2869, June 2000.
[16] Narten, T. and H. Alvestrand, "Guidelines for writing an IANA Considerations Section in RFCs", BCP 26, RFC 2434, October 1998.
[17] Hinden, R. and S. Deering, "IP Version 6 Addressing Architecture", RFC 2373, July 1998.

RFC2869

RFC2869 RADIUS Extensions https://www.rfc-editor.org/rfc/rfc2869.txt C. Rigney, W. Willats, P. Calhoun June 2000 Updated by RFC 3579, RFC 5080 Inf.

References

[1] Rigney, C., Willens, S., Rubens, A. and W. Simpson, "Remote Authentication Dial In User Service (RADIUS)", RFC 2865, June 2000.
[2] Rigney, C., "RADIUS Accounting", RFC 2866, June 2000.
[3] Blunk, L. and J. Vollbrecht, "PPP Extensible Authentication Protocol (EAP)", RFC 2284, March 1998.
[4] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March, 1997.
[5] Reynolds, J. and J. Postel, "Assigned Numbers", STD 2, RFC 1700, October 1994.
[6] Zorn, G., Leifer, D., Rubens, A., Shriver, J., Holdrege, M. and I. Goyret, "RADIUS Attributes for Tunnel Protocol Support", RFC 2868, June 2000.
[7] Zorn, G., Aboba, B. and D. Mitton, "RADIUS Accounting Modifications for Tunnel Protocol Support", RFC 2867, June 2000.
[8] Yergeau, F., "UTF-8, a transformation format of ISO 10646", RFC 2279, January 1998.
[9] Krawczyk, H., Bellare, M. and R. Canetti, "HMAC: Keyed-Hashing for Message Authentication", RFC 2104, February 1997.
[10] Alvestrand, H. and T. Narten, "Guidelines for Writing an IANA Considerations Section in RFCs", BCP 26, RFC 2434, October 1998.
[11] Slatalla, M., and Quittner, J., "Masters of Deception." HarperCollins, New York, 1995.

RFC3579

RFC3579 RADIUS (Remote Authentication Dial In User Service) Support For Extensible Authentication Protocol (EAP)https://www.ietf.org/rfc/rfc3579.txt B. Aboba, P. Calhoun September 2003, Updates RFC 2869, Updated by RFC 5080, Inf.

References

6.1. Normative References
[RFC1321] Rivest, R., "The MD5 Message-Digest Algorithm", RFC 1321, April 1992.
[RFC2104] Krawczyk, H., Bellare, M. and R. Canetti, "HMAC: Keyed-Hashing for Message Authentication", RFC 2104, February 1997.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC2279] Yergeau, F., "UTF-8, a transformation format of ISO 10646", RFC 2279, January 1998.
[RFC2284] Blunk, L. and J. Vollbrecht, "PPP Extensible Authentication Protocol (EAP)", RFC 2284, March 1998.
[RFC2401] Atkinson, R. and S. Kent, "Security Architecture for the Internet Protocol", RFC 2401, November 1998.
[RFC2406] Kent, S. and R. Atkinson, "IP Encapsulating Security Payload (ESP)", RFC 2406, November 1998.
[RFC2409] Harkins, D. and D. Carrel, "The Internet Key Exchange (IKE)", RFC 2409, November 1998.
[RFC2486] Aboba, B. and M. Beadles, "The Network Access Identifier", RFC 2486, January 1999.
[RFC2865] Rigney, C., Willens, S., Rubens, A. and W. Simpson, "Remote Authentication Dial In User Service (RADIUS)", RFC 2865, June 2000.
[RFC2988] Paxson, V. and M. Allman, "Computing TCP's Retransmission Timer", RFC 2988, November 2000.
[RFC3162] Aboba, B., Zorn, G. and D. Mitton, "RADIUS and IP6", RFC 3162, August 2001.
[RFC3280] Housley, R., Polk, W., Ford, W. and D. Solo, "Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile", RFC 3280, April 2002.
[RFC3576] Chiba, M., Dommety, G., Eklund, M., Mitton, D. and B. Aboba, "Dynamic Authorization Extensions to Remote Authentication Dial In User Service (RADIUS)", RFC 3576, July 2003.
6.2. Informative References
[RFC826] Plummer, D., "An Ethernet Address Resolution Protocol", STD 37, RFC 826, November 1982.
[RFC1510] Kohl, J. and C. Neuman, "The Kerberos Network Authentication Service (V5)", RFC 1510, September 1993.
[RFC1661] Simpson, W., "The Point-to-Point Protocol (PPP)", STD 51, RFC 1661, July 1994.
[RFC2548] Zorn, G., "Microsoft Vendor-specific RADIUS Attributes", RFC 2548, March 1999.
[RFC2607] Aboba, B. and J. Vollbrecht, "Proxy Chaining and Policy Implementation in Roaming", RFC 2607, June 1999.
[RFC2716] Aboba, B. and D. Simon,"PPP EAP TLS Authentication Protocol", RFC 2716, October 1999.
[RFC2866] Rigney, C., "RADIUS Accounting", RFC 2866, June 2000.
[RFC2867] Zorn, G., Aboba, B. and D. Mitton, "RADIUS Accounting Modifications for Tunnel Protocol Support", RFC 2867, June 2000.
[RFC2868] Zorn, G., Leifer, D., Rubens, A., Shriver, J., Holdrege, M. and I. Goyret, "RADIUS Attributes for Tunnel Protocol Support", RFC 2868, June 2000.
[RFC2869] Rigney, C., Willats, W. and P. Calhoun, "RADIUS Extensions", RFC 2869, June 2000.
[RFC2983] Black, D. "Differentiated Services and Tunnels", RFC 2983, October 2000.
[RFC3580] Congdon, P., Aboba, B., Smith, A., Zorn, G. and J. Roese, "IEEE 802.1X Remote Authentication Dial In User Service (RADIUS) Usage Guidelines", RFC 3580, September 2003.
[IEEE802] IEEE Standards for Local and Metropolitan Area Networks: Overview and Architecture, ANSI/IEEE Std 802, 1990.
[IEEE8021X] IEEE Standards for Local and Metropolitan Area Networks: Port based Network Access Control, IEEE Std 802.1X-2001, June 2001.
[MD5Attack] Dobbertin, H., "The Status of MD5 After a Recent Attack", CryptoBytes Vol.2 No.2, Summer 1996.
[Masters] Slatalla, M. and J. Quittner, "Masters of Deception." HarperCollins, New York, 1995.
[NASREQ] Calhoun, P., et al., "Diameter Network Access Server Application", Work in Progress.

用語(term)

RFC3579

authenticator

         The end of the link requiring the authentication.  Also
         known as the Network Access Server (NAS) or RADIUS client.
         Within IEEE 802.1X terminology, the term Authenticator is
         used.

peer

  The other end of the point-to-point link (PPP),
         point-to-point LAN segment (IEEE 802.1X) or wireless link,
         which is being authenticated by the authenticator.  In IEEE
         802.1X, this end is known as the Supplicant.

authentication server

         An authentication server is an entity that provides an
         authentication service to an authenticator (NAS).  This
         service verifies from the credentials provided by the peer,
         the claim of identity made by the peer; it also may provide
         credentials allowing the peer to verify the identity of the
         authentication server.  Within this document it is assumed
         that the NAS operates as a pass-through, forwarding EAP
         packets between the RADIUS server and the EAP peer.
         Therefore the RADIUS server operates as an authentication
         server.

displayable message

         This is interpreted to be a human readable string of
         characters, and MUST NOT affect operation of the protocol.
         The message encoding MUST follow the UTF-8 transformation
         format [RFC2279].

Network Access Server (NAS)

         The device providing access to the network.  Also known as
         the Authenticator (IEEE 802.1X or EAP terminology) or
         RADIUS client.

RFC2865, RFC2866, RFC2869

service

       The NAS provides a service to the dial-in user, such as PPP
         or Telnet.

RFC3579

service

      The NAS provides a service to the user, such as IEEE 802 or
         PPP.

RFC2865

session

        Each service provided by the NAS to a dial-in user
         constitutes a session, with the beginning of the session
         defined as the point where service is first provided and
         the end of the session defined as the point where service
         is ended.  A user may have multiple sessions in parallel or
         series if the NAS supports that.

RFC2866

session

        Each service provided by the NAS to a dial-in user
         constitutes a session, with the beginning of the session
         defined as the point where service is first provided and
         the end of the session defined as the point where service
         is ended.  A user may have multiple sessions in parallel or
         series if the NAS supports that, with each session
         generating a separate start and stop accounting record with
         its own Acct-Session-Id.

RFC2869

session

        Each service provided by the NAS to a dial-in user
         constitutes a session, with the beginning of the session
         defined as the point where service is first provided and
         the end of the session defined as the point where service
         is ended.  A user may have multiple sessions in parallel or
         series if the NAS supports that, with each session
         generating a separate start and stop accounting record.

##RFC3579
###session
Each service provided by the NAS to a peer constitutes a
session, with the beginning of the session defined as the
point where service is first provided and the end of the
session defined as the point where service is ended. A
peer may have multiple sessions in parallel or series if
the NAS supports that, with each session generating a
separate start and stop accounting record.

RFC2865, RFC2866, 2869, RFC3579

silently discard

         This means the implementation discards the packet without
         further processing.  The implementation SHOULD provide the
         capability of logging the error, including the contents of
         the silently discarded packet, and SHOULD record the event
         in a statistics counter.

RFC文書の参照関係

RFC	obsolate	updates	updated	reference	title
2865	2138			2138	Remote Authentication Dial In User Service (RADIUS)
				2119	Key words for use in RFCs to Indicate Requirement Levels
				1321	The MD5 Message-Digest Algorithm
				768	User Datagram Protocol
				2866	RADIUS Accounting
				1700	Assigned Numbers
				2279	UTF-8, a transformation format of ISO 10646
				2486	The Network Access Identifier
				1144	Compressing TCP/IP headers for low-speed serial links
				1990	The PPP Multilink Protocol (MP)
				2434	Guidelines for Writing an IANA Considerations Section in RFCs
				1352	SNMP Security Protocols
			2868		RADIUS Attributes for Tunnel Protocol Support
			3575		IANA Considerations for RADIUS (Remote Authentication Dial In User Service)
			5080		Common Remote Authentication Dial In User Service (RADIUS) Implementation Issues and Suggested Fixes
			6929		Remote Authentication Dial In User Service (RADIUS) Protocol Extensions
			8044		Data Types in RADIUS
2866	2139			2139	RADIUS Accounting
				2865	Remote Authentication Dial In User Service (RADIUS)
				2119	Key words for use in RFCs to Indicate Requirement Levels
				768	User Datagram Protocol
				1321	The MD5 Message-Digest Algorithm
				1700	Assigned Numbers
				2279	UTF-8, a transformation format of ISO 10646
				2434	Guidelines for Writing an IANA Considerations Section in RFCs
			2867		RADIUS Accounting Modifications for Tunnel Protocol Support
			5080		Common Remote Authentication Dial In User Service (RADIUS) Implementation Issues and Suggested Fixes
			5997		Use of Status-Server Packets in the Remote Authentication Dial In User Service (RADIUS) Protocol
2867		2866		2866	RADIUS Accounting
				2119	Key words for use in RFCs to Indicate Requirement Levels
				2868	RADIUS Attributes for Tunnel Protocol Support
				2661	Layer Two Tunneling Protocol "L2TP"
				2637	Point-to-Point Tunneling Protocol (PPTP)
2868		2865			Remote Authentication Dial In User Service (RADIUS)
			3575		IANA Considerations for RADIUS (Remote Authentication Dial In User Service)
				2637	Point-to-Point Tunneling Protocol (PPTP)
				2341	Cisco Layer Two Forwarding (Protocol) 'L2F
				2661	Layer Two Tunneling Protocol "L2TP"
				2107	Ascend Tunnel Management Protocol - ATMP
				2401	Security Architecture for the Internet Protocol
				2001	IP Encapsulation within IP
				2004	Minimal Encapsulation within IP
				1827	IP Encapsulating Security Payload (ESP)
				1701	Generic Routing Encapsulation (GRE)
				1853	IP in IP Tunneling
				2867	RADIUS Accounting Modifications for Tunnel Protocol Support
				2865	Remote Authentication Dial in User Service (RADIUS)
				2119	Key words for use in RFCs to Indicate Requirement Levels
				1700	Assigned Numbers
				2869	RADIUS Extensions"
				2434	Guidelines for Writing an IANA Considerations Section in RFCs
				2373	IP Version 6 Addressing Architecture
2869			3579
			5080		Common Remote Authentication Dial In User Service (RADIUS) Implementation Issues and Suggested Fixes
				2865	Remote Authentication Dial in User Service (RADIUS)
				2866	RADIUS Accounting
				2284	PPP Extensible Authentication Protocol (EAP)
				2119	Key words for use in RFCs to Indicate Requirement Levels
				1700	Assigned Numbers
				2868	RADIUS Attributes for Tunnel Protocol Support
				2867	RADIUS Accounting Modifications for Tunnel Protocol Support
				2279	UTF-8, a transformation format of ISO 10646
				2104	HMAC: Keyed-Hashing for Message Authentication"
				2434	Guidelines for Writing an IANA Considerations Section in RFCs
3579		2869			RADIUS Extensions
				1321	The MD5 Message-Digest Algorithm
				2104	HMAC: Keyed-Hashing for Message Authentication
				2119	Key words for use in RFCs to Indicate Requirement Levels
				2279	UTF-8, a transformation format of ISO 10646
				2284	PPP Extensible Authentication Protocol (EAP)
				2401	Security Architecture for the Internet Protocol
				2406	IP Encapsulating Security Payload (ESP)
				2409	The Internet Key Exchange (IKE)
				2486	The Network Access Identifier
				2865	Remote Authentication Dial In User Service (RADIUS)
				2988	Computing TCP's Retransmission Timer
				3162	RADIUS and IP6
				3280	Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile
				3576	Dynamic Authorization Extensions to Remote Authentication Dial In User Service (RADIUS)
				826	An Ethernet Address Resolution Protocol
				1510	The Kerberos Network Authentication Service (V5)
				1661	The Point-to-Point Protocol (PPP)
				2548	Microsoft Vendor-specific RADIUS Attributes
				2607	Proxy Chaining and Policy Implementation in Roaming
				2716	PPP EAP TLS Authentication Protocol"
				2866	RADIUS Accounting
				2867	RADIUS Accounting Modifications for Tunnel Protocol Support
				2868	RADIUS Attributes for Tunnel Protocol Support
				2869	RADIUS Extensions
				2983	Differentiated Services and Tunnels
				3580	IEEE 802.1X Remote Authentication Dial In User Service (RADIUS) Usage Guidelines

＜この記事は個人の過去の経験に基づく個人の感想です。現在所属する組織、業務とは関係がありません。＞

文書履歴(document history)

ver. 0.01 初稿　５文書(RFC2865,2866, 2867, 2868, 2869)の参考文献、参照関係整理　20190211 午前　
ver. 0.02 RFC3579, 用語(term)追記　20190211 夕
ver. 0.03 表題追記 20190318
ver. 0.04 みだし修正 20210707

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