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Versions: 00 01 02 03 04 RFC 2621
RADIUS Working Group Glen Zorn
INTERNET-DRAFT Microsoft
Category: Informational Bernard Aboba
<draft-ietf-radius-acc-servmib-04.txt> Microsoft
10 February 1999
RADIUS Accounting Server 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."
To view the list Internet-Draft Shadow Directories, see
http://www.ietf.org/shadow.html.
The distribution of this memo is unlimited. It is filed as <draft-ietf-
radius-acc-servmib-04.txt>, and expires August 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
server 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 servers.
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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 servers.
RADIUS accounting servers are today widely deployed by dialup Internet
Service Providers, in order to provide accounting services. As a result,
the effective management of RADIUS accounting servers 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 produced 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 thirteen scalars as well as a single table:
(1) the RADIUS Accounting Client Table contains one row for each
RADIUS accounting client that the server shares a secret with.
Each entry in the RADIUS Accounting Client Table includes eleven columns
presenting a view of the activity of the RADIUS accounting server.
7. Definitions
RADIUS-ACC-SERVER-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY, OBJECT-TYPE, OBJECT-IDENTITY,
Counter32, Integer32,
IpAddress, TimeTicks FROM SNMPv2-SMI
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SnmpAdminString FROM SNMP-FRAMEWORK-MIB
MODULE-COMPLIANCE, OBJECT-GROUP FROM SNMPv2-CONF
mib-2 FROM RFC1213-MIB;
radiusAccServMIB MODULE-IDENTITY
LAST-UPDATED "9901290000Z" -- 29 Jan 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 server
side of the Remote Access Dialin User Service (RADIUS)
accounting protocol."
REVISION "9901290000Z" -- 29 Jan 1999
DESCRIPTION "Initial version as published in RFC xxxx"
-- RCC xxxx to be assigned by IANA
::= { radiusAccounting 1 }
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}
radiusAccServMIBObjects OBJECT IDENTIFIER ::= { radiusAccServMIB 1 }
radiusAccServ OBJECT IDENTIFIER ::= { radiusAccServMIBObjects 1 }
radiusAccServIdent OBJECT-TYPE
SYNTAX SnmpAdminString
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The implementation identification string for the
RADIUS accounting server software in use on the
system, for example; `FNS-2.1'"
::= {radiusAccServ 1}
radiusAccServUpTime OBJECT-TYPE
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SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"If the server has a persistent state (e.g., a process),
this value will be the time elapsed (in hundredths of a
second) since the server process was started.
For software without persistent state, this value will
be zero."
::= {radiusAccServ 2}
radiusAccServResetTime OBJECT-TYPE
SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"If the server has a persistent state (e.g., a process)
and supports a `reset' operation (e.g., can be told to
re-read configuration files), this value will be the
time elapsed (in hundredths of a second) since the
server was `reset.' For software that does not
have persistence or does not support a `reset' operation,
this value will be zero."
::= {radiusAccServ 3}
radiusAccServConfigReset OBJECT-TYPE
SYNTAX INTEGER { other(1),
reset(2),
initializing(3),
running(4)}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"Status/action object to reinitialize any persistent
server state. When set to reset(2), any persistent
server state (such as a process) is reinitialized as if
the server had just been started. This value will
never be returned by a read operation. When read, one of
the following values will be returned:
other(1) - server in some unknown state;
initializing(3) - server (re)initializing;
running(4) - server currently running."
::= {radiusAccServ 4}
-- New Stats proposed by Dale E. Reed Jr (daler@iea.com)
radiusAccServTotalRequests OBJECT-TYPE
SYNTAX Counter32
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MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of packets received on the
accounting port."
::= { radiusAccServ 5 }
radiusAccServTotalInvalidRequests OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS Accounting-Request packets
received from unknown addresses."
::= { radiusAccServ 6 }
radiusAccServTotalDupRequests OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of duplicate RADIUS Accounting-Request
packets received."
::= { radiusAccServ 7 }
radiusAccServTotalResponses OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS Accounting-Response packets sent."
::= { radiusAccServ 8 }
radiusAccServTotalMalformedRequests OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of malformed RADIUS Accounting-Request
packets received. Bad authenticators or unknown
types are not included as malformed Access-Requests."
::= { radiusAccServ 9 }
radiusAccServTotalBadAuthenticators OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
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"The number of RADIUS Accounting-Request packets
which contained invalid Signature attributes."
::= { radiusAccServ 10 }
radiusAccServTotalPacketsDropped OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of incoming packets silently discarded
for a reason other than malformed, bad authenticators,
or unknown types."
::= { radiusAccServ 11 }
radiusAccServTotalNoRecords OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS Accounting-Request packets
which were received and responded to but not
recorded."
::= { radiusAccServ 12 }
radiusAccServTotalUnknownTypes OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS packets of unknowntype which
were received."
::= { radiusAccServ 13 }
-- End of new
radiusAccClientTable OBJECT-TYPE
SYNTAX SEQUENCE OF RadiusAccClientEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The (conceptual) table listing the RADIUS accounting
clients with which the server shares a secret."
::= { radiusAccServ 14 }
radiusAccClientEntry OBJECT-TYPE
SYNTAX RadiusAccClientEntry
MAX-ACCESS not-accessible
STATUS current
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DESCRIPTION
"An entry (conceptual row) representing a RADIUS
accounting client with which the server shares a secret."
INDEX { radiusAccClientIndex }
::= { radiusAccClientTable 1 }
RadiusAccClientEntry ::= SEQUENCE {
radiusAccClientIndex Integer32,
radiusAccClientAddress IpAddress,
radiusAccClientID SnmpAdminString,
radiusAccServPacketsDropped Counter32,
radiusAccServRequests Counter32,
radiusAccServDupRequests Counter32,
radiusAccServResponses Counter32,
radiusAccServBadAuthenticators Counter32,
radiusAccServMalformedRequests Counter32,
radiusAccServNoRecords Counter32,
radiusAccServUnknownTypes Counter32
}
radiusAccClientIndex OBJECT-TYPE
SYNTAX Integer32 (1..MAX)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A number uniquely identifying each RADIUS accounting
client with which this server communicates."
::= { radiusAccClientEntry 1 }
radiusAccClientAddress OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The NAS-IP-Address of the RADIUS accounting client
referred to in this table entry."
::= { radiusAccClientEntry 2 }
radiusAccClientID OBJECT-TYPE
SYNTAX SnmpAdminString
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The NAS-Identifier of the RADIUS accounting client
referred to in this table entry. This is not necessarily
the same as sysName in MIB II."
::= { radiusAccClientEntry 3 }
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-- Server Counters
--
-- Requests - DupRequests - BadAuthenticators - MalformedRequests -
-- UnknownTypes - PacketsDropped - Responses = Pending
--
-- Requests - DupRequests - BadAuthenticators - MalformedRequests -
-- UnknownTypes - PacketsDropped - NoRecords = entries logged
radiusAccServPacketsDropped OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of incoming packets received
from this client and silently discarded
for a reason other than malformed, bad
authenticators, or unknown types."
::= { radiusAccClientEntry 4 }
radiusAccServRequests OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of packets received from this
client on the accounting port."
::= { radiusAccClientEntry 5 }
radiusAccServDupRequests OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of duplicate RADIUS Accounting-Request
packets received from this client."
::= { radiusAccClientEntry 6 }
radiusAccServResponses OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS Accounting-Response packets
sent to this client."
::= { radiusAccClientEntry 7 }
radiusAccServBadAuthenticators OBJECT-TYPE
SYNTAX Counter32
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MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS Accounting-Request packets
which contained invalid authenticators received
from this client."
::= { radiusAccClientEntry 8 }
radiusAccServMalformedRequests OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of malformed RADIUS Accounting-Request
packets which were received from this client.
Bad authenticators and unknown types
are not included as malformed Accounting-Requests."
::= { radiusAccClientEntry 9 }
radiusAccServNoRecords OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS Accounting-Request packets
which were received and responded to but not
recorded."
::= { radiusAccClientEntry 10 }
radiusAccServUnknownTypes OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS packets of unknown type which
were received from this client."
::= { radiusAccClientEntry 11 }
-- conformance information
radiusAccServMIBConformance
OBJECT IDENTIFIER ::= { radiusAccServMIB 2 }
radiusAccServMIBCompliances
OBJECT IDENTIFIER ::= { radiusAccServMIBConformance 1 }
radiusAccServMIBGroups
OBJECT IDENTIFIER ::= { radiusAccServMIBConformance 2 }
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-- compliance statements
radiusAccServMIBCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"The compliance statement for accounting servers
implementing the RADIUS Accounting Server MIB."
MODULE -- this module
MANDATORY-GROUPS { radiusAccServMIBGroup }
OBJECT radiusAccServConfigReset
WRITE-SYNTAX INTEGER { reset(2) }
DESCRIPTION "The only SETable value is 'reset' (2)."
::= { radiusAccServMIBCompliances 1 }
-- units of conformance
radiusAccServMIBGroup OBJECT-GROUP
OBJECTS {radiusAccServIdent,
radiusAccServUpTime,
radiusAccServResetTime,
radiusAccServConfigReset,
radiusAccServTotalRequests,
radiusAccServTotalInvalidRequests,
radiusAccServTotalDupRequests,
radiusAccServTotalResponses,
radiusAccServTotalMalformedRequests,
radiusAccServTotalBadAuthenticators,
radiusAccServTotalPacketsDropped,
radiusAccServTotalNoRecords,
radiusAccServTotalUnknownTypes,
radiusAccClientAddress,
radiusAccClientID,
radiusAccServPacketsDropped,
radiusAccServRequests,
radiusAccServDupRequests,
radiusAccServResponses,
radiusAccServBadAuthenticators,
radiusAccServMalformedRequests,
radiusAccServNoRecords,
radiusAccServUnknownTypes
}
STATUS current
DESCRIPTION
"The collection of objects providing management of
a RADIUS Accounting Server."
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::= { radiusAccServMIBGroups 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.
[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,
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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.
[12] Blumenthal, U., and B. Wijnen, "User-based Securi 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 196.
[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 management objects (radiusAccServConfigReset) defined in this
MIB that have a MAX-ACCESS clause of read-write and/or read-create.
Such objects may be considered sensitive or vulnerable in some network
environments. The support for SET operations in a non-secure
environment without proper protection can have a negative effect on
network operations.
There are a number of managed objects in this MIB that may contain
sensitive information. These are:
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radiusAccClientAddress
This can be used to determine the address of the RADIUS
accounting client with which the server is communicating.
This information could be useful in impersonating the client.
radiusAccClientID
This can be used to determine the client ID for the accounting
client with which the server is communicating. This
information could be useful in impersonating the client.
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
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
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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
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-servermib-04.txt>, and
expires August 1, 1999.
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