RADIUS Accounting Client MIB
draft-ietf-radius-acc-clientmib-05
The information below is for an old version of the document that is already published as an RFC.
| Document | Type | RFC Internet-Draft (radius WG) | |
|---|---|---|---|
| Authors | Glen Zorn , Dr. Bernard D. Aboba | ||
| Last updated | 2013-03-02 (Latest revision 1999-04-01) | ||
| Stream | Internet Engineering Task Force (IETF) | ||
| Formats | plain text htmlized pdfized bibtex | ||
| Stream | WG state | (None) | |
| Document shepherd | (None) | ||
| IESG | IESG state | RFC 2620 (Informational) | |
| Consensus boilerplate | Unknown | ||
| Telechat date | (None) | ||
| Responsible AD | (None) | ||
| Send notices to | (None) |
draft-ietf-radius-acc-clientmib-05
RADIUS Working Group Bernard Aboba
INTERNET-DRAFT Microsoft
Category: Informational Glen Zorn
<draft-ietf-radius-acc-clientmib-05.txt> Microsoft
31 March 1999
RADIUS Accounting Client MIB
1. Status of this Memo
This document is an Internet-Draft and is in full conformance with all
provisions of Section 10 of RFC2026.
Internet-Drafts are working documents of the Internet Engineering Task
Force (IETF), its areas, and its working groups. Note that other groups
may also distribute working documents as Internet-Drafts. Internet-
Drafts are draft documents valid for a maximum of six months and may be
updated, replaced, or obsoleted by other documents at any time. It is
inappropriate to use Internet- Drafts as reference material or to cite
them other than as "work in progress."
The list of current Internet-Drafts can be accessed at
http://www.ietf.org/ietf/1id-abstracts.txt
The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html.
The distribution of this memo is unlimited. It is filed as <draft-ietf-
radius-acc-clientmib-05.txt>, and expires October 1, 1999. Please send
comments to the authors.
2. Copyright Notice
Copyright (C) The Internet Society (1999). All Rights Reserved.
3. Abstract
This memo defines a set of extensions which instrument RADIUS accounting
client functions. These extensions represent a portion of the Management
Information Base (MIB) for use with network management protocols in the
Internet community. Using these extensions IP-based management stations
can manage RADIUS accounting clients.
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4. Introduction
This memo defines a portion of the Management Information Base (MIB) for
use with network management protocols in the Internet community. In
particular, it describes managed objects used for managing RADIUS
accounting clients.
Today a wide range of network devices, including routers and NASes, act
as RADIUS accounting clients in order to provide accounting services.
As a result, the effective management of RADIUS accounting clients is of
considerable importance.
5. The SNMP Management Framework
The SNMP Management Framework presently consists of five major
components:
o An overall architecture, described in RFC 2271 [1].
o Mechanisms for describing and naming objects and events for the
purpose of management. The first version of this Structure of
Management Information (SMI) is called SMIv1 and described in
RFC 1155 [2], RFC 1212 [3] and RFC 1215 [4]. The second version,
called SMIv2, is described in RFC 1902 [5], RFC 1903 [6] and RFC
1904 [7].
o Message protocols for transferring management information. The
first version of the SNMP message protocol is called SNMPv1 and
described in RFC 1157 [8]. A second version of the SNMP message
protocol, which is not an Internet standards track protocol, is
called SNMPv2c and described in RFC 1901 [9] and RFC 1906 [10].
The third version of the message protocol is called SNMPv3 and
described in RFC 1906 [10], RFC 2272 [11] and RFC 2274 [12].
o Protocol operations for accessing management information. The
first set of protocol operations and associated PDU formats is
described in RFC 1157 [8]. A second set of protocol operations
and associated PDU formats is described in RFC 1905 [13].
o A set of fundamental applications described in RFC 2273 [14] and
the view-based access control mechanism described in RFC 2275
[15].
Managed objects are accessed via a virtual information store, termed the
Management Information Base or MIB. Objects in the MIB are defined
using the mechanisms defined in the SMI.
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This memo specifies a MIB module that is compliant to the SMIv2. A MIB
conforming to the SMIv1 can be poduced through the appropriate
translations. The resulting translated MIB must be semantically
equivalent, except where objects or events are omitted because no
translation is possible (use of Counter64). Some machine readable
information in SMIv2 will be converted into textual descriptions in
SMIv1 during the translation process. However, this loss of machine
readable information is not considered to change the semantics of the
MIB.
6. Overview
The RADIUS accounting protocol, described in [16], distinguishes between
the client function and the server function. In RADIUS accounting,
clients send Accounting-Requests, and servers reply with Accounting-
Responses. Typically NAS devices implement the client function, and thus
would be expected to implement the RADIUS accounting client MIB, while
RADIUS accounting servers implement the server function, and thus would
be expected to implement the RADIUS accounting server MIB.
However, it is possible for a RADIUS accounting entity to perform both
client and server functions. For example, a RADIUS proxy may act as a
server to one or more RADIUS accounting clients, while simultaneously
acting as an accounting client to one or more accounting servers. In
such situations, it is expected that RADIUS entities combining client
and server functionality will support both the client and server MIBs.
6.1. Selected objects
This MIB module contains two scalars as well as a single table:
(1) the RADIUS Accounting Server Table contains one row for each
RADIUS server that the client shares a secret with.
Each entry in the RADIUS Accounting Server Table includes thirteen
columns presenting a view of the activity of the RADIUS client.
7. Definitions
RADIUS-ACC-CLIENT-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY, OBJECT-TYPE, OBJECT-IDENTITY,
Counter32, Integer32, Gauge32,
IpAddress, TimeTicks FROM SNMPv2-SMI
SnmpAdminString FROM SNMP-FRAMEWORK-MIB
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MODULE-COMPLIANCE, OBJECT-GROUP FROM SNMPv2-CONF
mib-2 FROM RFC1213-MIB;
radiusAccClientMIB MODULE-IDENTITY
LAST-UPDATED "9903290000Z" -- 29 Mar 1999
ORGANIZATION "IETF RADIUS Working Group."
CONTACT-INFO
" Bernard Aboba
Microsoft
One Microsoft Way
Redmond, WA 98052
US
Phone: +1 425 936 6605
EMail: bernarda@microsoft.com"
DESCRIPTION
"The MIB module for entities implementing the client side of
the Remote Access Dialin User Service (RADIUS) accounting
protocol."
REVISION "9903290000Z" -- 29 Mar 1999
DESCRIPTION "Initial version as published in RFC xxxx"
-- RCC xxxx to be assigned by IANA
::= { radiusAccounting 2 }
radiusMIB OBJECT-IDENTITY
STATUS current
DESCRIPTION
"The OID assigned to RADIUS MIB work by the IANA."
::= { mib-2 xxx } -- To be assigned by IANA
radiusAccounting OBJECT IDENTIFIER ::= {radiusMIB 2}
radiusAccClientMIBObjects OBJECT IDENTIFIER ::= { radiusAccClientMIB 1 }
radiusAccClient OBJECT IDENTIFIER ::= { radiusAccClientMIBObjects 1 }
radiusAccClientInvalidServerAddresses OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS Accounting-Response packets
received from unknown addresses."
::= { radiusAccClient 1 }
radiusAccClientIdentifier OBJECT-TYPE
SYNTAX SnmpAdminString
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MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The NAS-Identifier of the RADIUS accounting client. This
is not necessarily the same as sysName in MIB II."
::= { radiusAccClient 2 }
radiusAccServerTable OBJECT-TYPE
SYNTAX SEQUENCE OF RadiusAccServerEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The (conceptual) table listing the RADIUS accounting
servers with which the client shares a secret."
::= { radiusAccClient 3 }
radiusAccServerEntry OBJECT-TYPE
SYNTAX RadiusAccServerEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry (conceptual row) representing a RADIUS
accounting server with which the client shares a secret."
INDEX { radiusAccServerIndex }
::= { radiusAccServerTable 1 }
RadiusAccServerEntry ::= SEQUENCE {
radiusAccServerIndex Integer32,
radiusAccServerAddress IpAddress,
radiusAccClientServerPortNumber Integer32,
radiusAccClientRoundTripTime TimeTicks,
radiusAccClientRequests Counter32,
radiusAccClientRetransmissions Counter32,
radiusAccClientResponses Counter32,
radiusAccClientMalformedResponses Counter32,
radiusAccClientBadAuthenticators Counter32,
radiusAccClientPendingRequests Gauge32,
radiusAccClientTimeouts Counter32,
radiusAccClientUnknownTypes Counter32,
radiusAccClientPacketsDropped Counter32
}
radiusAccServerIndex OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A number uniquely identifying each RADIUS
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Accounting server with which this client
communicates."
::= { radiusAccServerEntry 1 }
radiusAccServerAddress OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The IP address of the RADIUS accounting server
referred to in this table entry."
::= { radiusAccServerEntry 2 }
radiusAccClientServerPortNumber OBJECT-TYPE
SYNTAX Integer32 (0..65535)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The UDP port the client is using to send requests to
this server."
::= { radiusAccServerEntry 3 }
radiusAccClientRoundTripTime OBJECT-TYPE
SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The time interval between the most recent
Accounting-Response and the Accounting-Request that
matched it from this RADIUS accounting server."
::= { radiusAccServerEntry 4 }
-- Request/Response statistics
--
-- Requests = Responses + PendingRequests + ClientTimeouts
--
-- Responses - MalformedResponses - BadAuthenticators -
-- UnknownTypes - PacketsDropped = Successfully received
radiusAccClientRequests OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS Accounting-Request packets
sent. This does not include retransmissions."
::= { radiusAccServerEntry 5 }
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radiusAccClientRetransmissions OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS Accounting-Request packets
retransmitted to this RADIUS accounting server.
Retransmissions include retries where the
Identifier and Acct-Delay have been updated, as
well as those in which they remain the same."
::= { radiusAccServerEntry 6 }
radiusAccClientResponses OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS packets received on the
accounting port from this server."
::= { radiusAccServerEntry 7 }
radiusAccClientMalformedResponses OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of malformed RADIUS Accounting-Response
packets received from this server. Malformed packets
include packets with an invalid length. Bad
authenticators and unknown types are not included as
malformed accounting responses."
::= { radiusAccServerEntry 8 }
radiusAccClientBadAuthenticators OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS Accounting-Response
packets which contained invalid authenticators
received from this server."
::= { radiusAccServerEntry 9 }
radiusAccClientPendingRequests OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
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"The number of RADIUS Accounting-Request packets
sent to this server that have not yet timed out or
received a response. This variable is incremented when an
Accounting-Request is sent and decremented due to
receipt of an Accounting-Response, a timeout or
a retransmission."
::= { radiusAccServerEntry 10 }
radiusAccClientTimeouts OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of accounting timeouts to this server.
After a timeout the client may retry to the same
server, send to a different server, or give up.
A retry to the same server is counted as a
retransmit as well as a timeout. A send to a different
server is counted as an Accounting-Request as well as a timeout."
::= { radiusAccServerEntry 11 }
radiusAccClientUnknownTypes OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS packets of unknown type which
were received from this server on the accounting port."
::= { radiusAccServerEntry 12 }
radiusAccClientPacketsDropped OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS packets which were received from
this server on the accounting port and dropped for some other
reason."
::= { radiusAccServerEntry 13 }
-- conformance information
radiusAccClientMIBConformance
OBJECT IDENTIFIER ::= { radiusAccClientMIB 2 }
radiusAccClientMIBCompliances
OBJECT IDENTIFIER ::= { radiusAccClientMIBConformance 1 }
radiusAccClientMIBGroups
OBJECT IDENTIFIER ::= { radiusAccClientMIBConformance 2 }
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-- compliance statements
radiusAccClientMIBCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"The compliance statement for accounting clients
implementing the RADIUS Accounting Client MIB."
MODULE -- this module
MANDATORY-GROUPS { radiusAccClientMIBGroup }
::= { radiusAccClientMIBCompliances 1 }
-- units of conformance
radiusAccClientMIBGroup OBJECT-GROUP
OBJECTS { radiusAccClientIdentifier,
radiusAccClientInvalidServerAddresses,
radiusAccServerAddress,
radiusAccClientServerPortNumber,
radiusAccClientRoundTripTime,
radiusAccClientRequests,
radiusAccClientRetransmissions,
radiusAccClientResponses,
radiusAccClientMalformedResponses,
radiusAccClientBadAuthenticators,
radiusAccClientPendingRequests,
radiusAccClientTimeouts,
radiusAccClientUnknownTypes,
radiusAccClientPacketsDropped
}
STATUS current
DESCRIPTION
"The basic collection of objects providing management of
RADIUS Accounting Clients."
::= { radiusAccClientMIBGroups 1 }
END
8. References
[1] Harrington, D., Presuhn, R., and B. Wijnen, "An Architecture for
Describing SNMP Management Frameworks", RFC 2271, Cabletron
Systems, Inc., BMC Software, Inc., IBM T. J. Watson Research,
January 1998.
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[2] Rose, M., and K. McCloghrie, "Structure and Identification of
Management Information for TCP/IP-based Internets", RFC 1155,
Performance Systems International, Hughes LAN Systems, May 1990.
[3] Rose, M., and K. McCloghrie, "Concise MIB Definitions", RFC 1212,
Performance Systems International, Hughes LAN Systems, March 1991.
[4] M. Rose, "A Convention for Defining Traps for use with the SNMP",
RFC 1215, Performance Systems International, March 1991.
[5] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, "Structure
of Management Information for Version 2 of the Simple Network
Management Protocol (SNMPv2)", RFC 1902, SNMP Research,Inc., Cisco
Systems, Inc., Dover Beach Consulting, Inc., International Network
Services, January 1996.
[6] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, "Textual
Conventions for Version 2 of the Simple Network Management Protocol
(SNMPv2)", RFC 1903, SNMP Research, Inc., Cisco Systems, Inc.,
Dover Beach Consulting, Inc., International Network Services,
January 1996.
[7] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, "Conformance
Statements for Version 2 of the Simple Network Management Protocol
(SNMPv2)", RFC 1904, SNMP Research, Inc., Cisco Systems, Inc.,
Dover Beach Consulting, Inc., International Network Services,
January 1996.
[8] Case, J., Fedor, M., Schoffstall, M., and J. Davin, "Simple Network
Management Protocol", RFC 1157, SNMP Research, Performance Systems
International, Performance Systems International, MIT Laboratory
for Computer Science, May 1990.
[9] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser,
"Introduction to Community-based SNMPv2", RFC 1901, SNMP Research,
Inc., Cisco Systems, Inc., Dover Beach Consulting, Inc.,
International Network Services, January 1996.
[10] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, "Transport
Mappings for Version 2 of the Simple Network Management Protocol
(SNMPv2)", RFC 1906, SNMP Research, Inc., Cisco Systems, Inc.,
Dover Beach Consulting, Inc., International Network Services,
January 1996.
[11] Case, J., Harrington D., Presuhn R., and B. Wijnen, "Message
Processing and Dispatching for the Simple Network Management
Protocol (SNMP)", RFC 2272, SNMP Research, Inc., Cabletron Systems,
Inc., BMC Software, Inc., IBM T. J. Watson Research, January 1998.
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[12] Blumenthal, U., and B. Wijnen, "User-based Security Model (USM) for
version 3 of the Simple Network Management Protocol (SNMPv3)", RFC
2274, IBM T. J. Watson Research, January 1998.
[13] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, "Protocol
Operations for Version 2 of the Simple Network Management Protocol
(SNMPv2)", RFC 1905, SNMP Research, Inc., Cisco Systems, Inc.,
Dover Beach Consulting, Inc., International Network Services,
January 16.
[14] Levi, D., Meyer, P., and B. Stewart, "SNMPv3 Applications", RFC
2273, SNMP Research, Inc., Secure Computing Corporation, Cisco
Systems, January 1998
[15] Wijnen, B., Presuhn, R., and K. McCloghrie, "View-based Access
Control Model (VACM) for the Simple Network Management Protocol
(SNMP)", RFC 2275, IBM T. J. Watson Research, BMC Software, Inc.,
Cisco Systems, Inc., January 1998
[16] Rigney, C., "RADIUS Accounting", RFC 2139, April 1997.
9. Security considerations
There are no management objects defined in this MIB that have a MAX-
ACCESS clause of read-write and/or read-create. So, if this MIB is
implemented correctly, then there is no risk that an intruder can alter
or create any management objects of this MIB via direct SNMP SET
opertions.
There are a number of managed objects in this MIB that may contain
sensitive information. These are:
radiusAccServerAddress
This can be used to determine the address of the RADIUS
accounting server with which the client is communicating. This
information could be useful in mounting an attack on the
acounting server, which may contain sensitive financial data.
radiusAccClientServerPortNumber
This can be used to determine the port number on which the
RADIUS accounting client is sending. This information could be
useful in impersonating the client in order to send fraudulent
data to the accounting server.
It is thus important to control even GET access to these objects and
possibly to even encrypt the values of these object when sending them
over the network via SNMP. Not all versions of SNMP provide features
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for such a secure environment.
SNMPv1 by itself is not a secure environment. Even if the network itself
is secure (for example by using IPSec), there is no control as to who on
the secure network is allowed to access and GET/SET
(read/change/create/delete) the objects in this MIB.
It is recommended that the implementers consider the security features
as provided by the SNMPv3 framework. Specifically, the use of the User-
based Security Model RFC 2274 [12] and the View-based Access Control
Model RFC 2275 [15] is recommended. Using these security features,
customer/users can give access to the objects only to those principals
(users) that have legitimate rights to GET or SET (change/create/delete)
them.
10. Acknowledgments
The authors acknowledge the contributions of the RADIUS Working Group in
the development of this MIB. Thanks to Narendra Gidwani of Microsoft,
Allan C. Rubens of MERIT, Carl Rigney of Livingston and Peter Heitman of
American Internet Corporation for useful discussions of this problem
space.
11. Authors' Addresses
Bernard Aboba
Microsoft Corporation
One Microsoft Way
Redmond, WA 98052
Phone: 425-936-6605
EMail: bernarda@microsoft.com
Glen Zorn
Microsoft Corporation
One Microsoft Way
Redmond, WA 98052
Phone: 425-703-1559
EMail: glennz@microsoft.com
12. Full Copyright Statement
Copyright (C) The Internet Society (1999). All Rights Reserved.
This document and translations of it may be copied and furnished to
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others, and derivative works that comment on or otherwise explain it or
assist in its implmentation may be prepared, copied, published and
distributed, in whole or in part, without restriction of any kind,
provided that the above copyright notice and this paragraph are included
on all such copies and derivative works. However, this document itself
may not be modified in any way, such as by removing the copyright notice
or references to the Internet Society or other Internet organizations,
except as needed for the purpose of developing Internet standards in
which case the procedures for copyrights defined in the Internet
Standards process must be followed, or as required to translate it into
languages other than English. The limited permissions granted above are
perpetual and will not be revoked by the Internet Society or its
successors or assigns. This document and the information contained
herein is provided on an "AS IS" basis and THE INTERNET SOCIETY AND THE
INTERNET ENGINEERING TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE
INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE."
13. Expiration Date
This memo is filed as <draft-ietf-radius-acc-clientmib-05.txt>, and
expires October 1, 1999.
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