Network Working Group B. Aboba Request for Comments: 3575 Microsoft Updates: 2865 July 2003 Category: Standard Track IANA Considerations for RADIUS (Remote Authentication Dial In User Service) 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. Copyright Notice Copyright (C) The Internet Society (2003). All Rights Reserved.
AbstractThis document describes the IANA considerations for the Remote Authentication Dial In User Service (RADIUS). This document updates RFC 2865. RFC2865], in accordance with BCP 26, [RFC2434]. It also reserves Packet Type Codes that are or have been in use on the Internet. RFC2119].
BCP 26: "name space", "assigned value", "registration". The following policies are used here with the meanings defined in BCP 26: "Private Use", "First Come First Served", "Expert Review", "Specification Required", "IESG Approval", "IETF Consensus", "Standards Action". RFC2865]. RADIUS is not intended as a general-purpose protocol, and allocations SHOULD NOT be made for purposes unrelated to Authentication, Authorization or Accounting. RFC2865], while Type Codes 40-45, 250-253 are allocated by this document. Type Codes 250-253 are allocated for Experimental Uses, and 254-255 are reserved. Packet Type Codes 6-10, 12-13, 21-34, 50-51 have no meaning defined by an IETF RFC, but are reserved until a specification is provided for them. This is being done to avoid interoperability problems with software that implements non-standard RADIUS extensions that are or
have been in use on the Internet. Because a new Packet Type has considerable impact on interoperability, a new Packet Type Code requires IESG Approval. The intention is that any allocation will be accompanied by a published RFC. Type Codes 52-249 should be allocated first; when these are exhausted, Type Codes 14-20, 35-39, 46-49 may be allocated. For a list of Type Codes, see Appendix A. Attribute Types have a range from 1 to 255, and are the scarcest resource in RADIUS, thus must be allocated with care. Attributes 1-53,55,60-88,90-91,94-100 have been allocated, with 17 and 21 available for re-use. Attributes 17, 21, 54, 56-59, 89, 101-191 may be allocated by IETF Consensus. It is recommended that attributes 17 and 21 be used only after all others are exhausted. Note that RADIUS defines a mechanism for Vendor-Specific extensions (Attribute 26) for functions specific only to one vendor's implementation of RADIUS, where no interoperability is deemed useful. For functions specific only to one vendor's implementation of RADIUS, the use of that should be encouraged instead of the allocation of global attribute types. As noted in [RFC2865]: Attribute Type Values 192-223 are reserved for experimental use, values 224-240 are reserved for implementation-specific use, and values 241-255 are reserved and should not be used. Therefore Attribute Type values 192-240 are considered Private Use, and values 241-255 require Standards Action. Certain attributes (for example, NAS-Port-Type) in RADIUS define a list of values to correspond with various meanings. There can be 4 billion (2^32) values for each attribute. Additional values can be allocated by the Designated Expert. The exception to this policy is the Service-Type attribute (6), whose values define new modes of operation for RADIUS. Values 1-16 of the Service-Type attribute have been allocated. Allocation of new Service-Type values are by IETF Consensus. The intention is that any allocation will be accompanied by a published RFC. [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC2434] Narten, T. and H. Alvestrand, "Guidelines for Writing an IANA Considerations Section in RFCs", BCP 26, RFC 2434, October 1998. [RFC2865] Rigney, C., Willens, S., Rubens, A. and W. Simpson, "Remote Authentication Dial In User Service (RADIUS)", RFC 2865, June 2000. [RFC2607] Aboba, B. and J. Vollbrecht, "Proxy Chaining and Policy Implementation in Roaming", RFC 2607, June 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. [RFC2869bis] Aboba, B. and P. Calhoun, "RADIUS Support for Extensible Authentication Protocol (EAP)", Work in Progress. [RFC2882] Mitton, D., "Network Access Servers Requirements: Extended RADIUS Practices", RFC 2882, July 2000. [RFC3162] Aboba, B., Zorn, G. and D. Mitton, "RADIUS and IPv6", RFC 3162, August 2001. [DynAuth] 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. RFC2434] are generally applicable to this document. Security considerations relating to the RADIUS protocol are discussed in [RFC2607], [RFC2865], [RFC3162], [DynAuth], and [RFC2869bis].
DynAuth], are being formally allocated here. Codes 40-45 were listed in [RFC2882] and have been implemented and used. Given their current widespread usage, these assignments are not reclaimable in practice. # Message Reference ---- ------------------------- --------- 1 Access-Request [RFC2865] 2 Access-Accept [RFC2865] 3 Access-Reject [RFC2865] 4 Accounting-Request [RFC2865] 5 Accounting-Response [RFC2865] 6 Accounting-Status [RFC2882] (now Interim Accounting) 7 Password-Request [RFC2882] 8 Password-Ack [RFC2882] 9 Password-Reject [RFC2882] 10 Accounting-Message [RFC2882] 11 Access-Challenge [RFC2865] 12 Status-Server (experimental) [RFC2865] 13 Status-Client (experimental) [RFC2865] 21 Resource-Free-Request [RFC2882] 22 Resource-Free-Response [RFC2882] 23 Resource-Query-Request [RFC2882] 24 Resource-Query-Response [RFC2882] 25 Alternate-Resource- Reclaim-Request [RFC2882] 26 NAS-Reboot-Request [RFC2882] 27 NAS-Reboot-Response [RFC2882] 28 Reserved 29 Next-Passcode [RFC2882]
# Message Reference ---- ------------------------- --------- 30 New-Pin [RFC2882] 31 Terminate-Session [RFC2882] 32 Password-Expired [RFC2882] 33 Event-Request [RFC2882] 34 Event-Response [RFC2882] 40 Disconnect-Request [DynAuth] 41 Disconnect-ACK [DynAuth] 42 Disconnect-NAK [DynAuth] 43 CoA-Request [DynAuth] 44 CoA-ACK [DynAuth] 45 CoA-NAK [DynAuth] 50 IP-Address-Allocate [RFC2882] 51 IP-Address-Release [RFC2882] 250-253 Experimental Use 254 Reserved 255 Reserved [RFC2865]
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