Request for Comments: 4668 Enterasys Networks
Obsoletes: 2618 August 2006
Category: Standards Track
RADIUS Authentication Client MIB for IPv6
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 (2006).
Abstract
This memo defines a set of extensions that instrument RADIUS
authentication 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
authentication clients.
This memo obsoletes RFC 2618 by deprecating the MIB table containing
IPv4-only address formats and defining a new table to add support for
version-neutral IP address formats. The remaining MIB objects from
RFC 2618 are carried forward into this document. The memo also adds
UNITS and REFERENCE clauses to selected objects.
Table of Contents
1. Introduction ....................................................3
2. Terminology .....................................................3
3. The Internet-Standard Management Framework ......................3
4. Scope of Changes ................................................3
5. Structure of the MIB Module .....................................4
6. Deprecated Objects ..............................................5
7. Definitions .....................................................5
8. Security Considerations ........................................20
9. References .....................................................22
9.1. Normative References ......................................22
9.2. Informative References ....................................22
Appendix A. Acknowledgements ......................................23
1. Introduction
This memo defines a portion of the Management Information Base (MIB)
for use with network management protocols in the Internet community.
The objects defined within this memo relate to the Remote
Authentication Dial-In User Service (RADIUS) Authentication Client as
defined in RFC 2865 [RFC2865].
2. Terminology
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119].
This document uses terminology from RFC 2865 [RFC2865].
This document uses the word "malformed" with respect to RADIUS
packets, particularly in the context of counters of "malformed
packets". While RFC 2865 does not provide an explicit definition of
"malformed", malformed generally means that the implementation has
determined the packet does not match the format defined in RFC 2865.
Some implementations may determine that packets are malformed when
the Vendor Specific Attribute (VSA) format does not follow the RFC
2865 recommendations for VSAs. Those implementations are used in
deployments today, and thus set the de facto definition of
"malformed".
3. The Internet-Standard Management Framework
For a detailed overview of the documents that describe the current
Internet-Standard Management Framework, please refer to section 7 of
RFC 3410 [RFC3410].
Managed objects are accessed via a virtual information store, termed
the Management Information Base or MIB. MIB objects are generally
accessed through the Simple Network Management Protocol (SNMP).
Objects in the MIB are defined using the mechanisms defined in the
Structure of Management Information (SMI). This memo specifies a MIB
module that is compliant to the SMIv2, which is described in STD 58,
RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and STD 58, RFC 2580
[RFC2580].
4. Scope of Changes
This document obsoletes RFC 2618 [RFC2618], RADIUS Authentication
Client MIB, by deprecating the radiusAuthServerTable table and adding
a new table, radiusAuthServerExtTable, containing
radiusAuthServerInetAddressType, radiusAuthServerInetAddress, and
radiusAuthClientServerInetPortNumber. The purpose of these added MIB
objects is to support version-neutral IP addressing formats. The
existing table containing radiusAuthServerAddress and
radiusAuthClientServerPortNumber is deprecated. The remaining MIB
objects are carried forward from RFC 2618 into this document. This
memo also adds UNITS and REFERENCE clauses to selected objects.
RFC 4001 [RFC4001], which defines the SMI Textual Conventions for
IPv6 addresses, contains the following recommendation.
’In particular, when revising a MIB module that contains IPv4
specific tables, it is suggested to define new tables using the
textual conventions defined in this memo [RFC4001] that support all
versions of IP. The status of the new tables SHOULD be "current",
whereas the status of the old IP version specific tables SHOULD be
changed to "deprecated". The other approach, of having multiple
similar tables for different IP versions, is strongly discouraged.’
5. Structure of the MIB Module
The RADIUS authentication protocol, described in RFC 2865 [RFC2865],
distinguishes between the client function and the server function.
In RADIUS authentication, clients send Access-Requests, and servers
reply with Access-Accepts, Access-Rejects, and Access-Challenges.
Typically, Network Access Server (NAS) devices implement the client
function, and thus would be expected to implement the RADIUS
authentication client MIB, while RADIUS authentication servers
implement the server function, and thus would be expected to
implement the RADIUS authentication server MIB.
However, it is possible for a RADIUS authentication entity to perform
both client and server functions. For example, a RADIUS proxy may
act as a server to one or more RADIUS authentication clients, while
simultaneously acting as an authentication client to one or more
authentication servers. In such situations, it is expected that
RADIUS entities combining client and server functionality will
support both the client and server MIBs. The client MIB is defined
in this document, and the server MIB is defined in [RFC4669].
This MIB module contains two scalars as well as a single table, the
RADIUS Authentication Server Table, which contains one row for each
RADIUS authentication server with which the client shares a secret.
Each entry in the RADIUS Authentication Server Table includes sixteen
columns presenting a view of the activity of the RADIUS
authentication client.
This MIB imports from [RFC2578], [RFC2580], [RFC3411], and [RFC4001].
6. Deprecated Objects
The deprecated table in this MIB is carried forward from RFC 2618
[RFC2618]. There are two conditions under which it MAY be desirable
for managed entities to continue to support the deprecated table:
1. The managed entity only supports IPv4 address formats.
2. The managed entity supports both IPv4 and IPv6 address formats,
and the deprecated table is supported for backwards compatibility
with older management stations. This option SHOULD only be used
when the IP addresses in the new table are in IPv4 format and can
accurately be represented in both the new table and the
deprecated table.
Managed entities SHOULD NOT instantiate row entries in the deprecated
table, containing IPv4-only address objects, when the RADIUS server
address represented in such a table row is not an IPv4 address.
Managed entities SHOULD NOT return inaccurate values of IP address or
SNMP object access errors for IPv4-only address objects in otherwise
populated tables. When row entries exist in both the deprecated
IPv4-only table and the new IP-version-neutral table that describe
the same RADIUS server, the row indexes SHOULD be the same for the
corresponding rows in each table, to facilitate correlation of these
related rows by management applications.
7. Definitions
RADIUS-AUTH-CLIENT-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY, OBJECT-TYPE, OBJECT-IDENTITY,
Counter32, Integer32, Gauge32,
IpAddress, TimeTicks, mib-2 FROM SNMPv2-SMI
SnmpAdminString FROM SNMP-FRAMEWORK-MIB
InetAddressType, InetAddress,
InetPortNumber FROM INET-ADDRESS-MIB
MODULE-COMPLIANCE, OBJECT-GROUP FROM SNMPv2-CONF;
radiusAuthClientMIB MODULE-IDENTITY
LAST-UPDATED "200608210000Z" -- 21 August 2006
ORGANIZATION "IETF RADIUS Extensions 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 Authentication Dial-In User Service
(RADIUS) authentication protocol. Copyright (C) The
Internet Society (2006). This version of this MIB
module is part of RFC 4668; see the RFC itself for
full legal notices."
REVISION "200608210000Z" -- 21 August 2006
DESCRIPTION
"Revised version as published in RFC 4668. This
version obsoletes that of RFC 2618 by deprecating
the MIB table containing IPv4-only address formats
and defining a new table to add support for version
neutral IP address formats. The remaining MIB objects
from RFC 2618 are carried forward into this version."
REVISION "199906110000Z" -- 11 Jun 1999
DESCRIPTION "Initial version as published in RFC 2618."
::= { radiusAuthentication 2 }
radiusMIB OBJECT-IDENTITY
STATUS current
DESCRIPTION
"The OID assigned to RADIUS MIB work by the IANA."
::= { mib-2 67 }
radiusAuthentication OBJECT IDENTIFIER ::= {radiusMIB 1}
radiusAuthClientMIBObjects OBJECT IDENTIFIER
::= { radiusAuthClientMIB 1 }
radiusAuthClient OBJECT IDENTIFIER
::= { radiusAuthClientMIBObjects 1 }
radiusAuthClientInvalidServerAddresses OBJECT-TYPE
SYNTAX Counter32
UNITS "packets"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS Access-Response packets
received from unknown addresses."
::= { radiusAuthClient 1 }
radiusAuthClientIdentifier OBJECT-TYPE
SYNTAX SnmpAdminString
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The NAS-Identifier of the RADIUS authentication client.
This is not necessarily the same as sysName in MIB II."
REFERENCE "RFC 2865 section 5.32"
::= { radiusAuthClient 2 }
radiusAuthServerTable OBJECT-TYPE
SYNTAX SEQUENCE OF RadiusAuthServerEntry
MAX-ACCESS not-accessible
STATUS deprecated
DESCRIPTION
"The (conceptual) table listing the RADIUS authentication
servers with which the client shares a secret."
::= { radiusAuthClient 3 }
radiusAuthServerEntry OBJECT-TYPE
SYNTAX RadiusAuthServerEntry
MAX-ACCESS not-accessible
STATUS deprecated
DESCRIPTION
"An entry (conceptual row) representing a RADIUS
authentication server with which the client shares
a secret."
INDEX { radiusAuthServerIndex }
::= { radiusAuthServerTable 1 }
RadiusAuthServerEntry ::= SEQUENCE {
radiusAuthServerIndex Integer32,
radiusAuthServerAddress IpAddress,
radiusAuthClientServerPortNumber Integer32,
radiusAuthClientRoundTripTime TimeTicks,
radiusAuthClientAccessRequests Counter32,
radiusAuthClientAccessRetransmissions Counter32,
radiusAuthClientAccessAccepts Counter32,
radiusAuthClientAccessRejects Counter32,
radiusAuthClientAccessChallenges Counter32,
radiusAuthClientMalformedAccessResponses Counter32,
radiusAuthClientBadAuthenticators Counter32,
radiusAuthClientPendingRequests Gauge32,
radiusAuthClientTimeouts Counter32,
radiusAuthClientUnknownTypes Counter32,
radiusAuthClientPacketsDropped Counter32
}
radiusAuthServerIndex OBJECT-TYPE
SYNTAX Integer32 (1..2147483647)
MAX-ACCESS not-accessible
STATUS deprecated
DESCRIPTION
"A number uniquely identifying each RADIUS
Authentication server with which this client
communicates."
::= { radiusAuthServerEntry 1 }
radiusAuthServerAddress OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The IP address of the RADIUS authentication server
referred to in this table entry."
::= { radiusAuthServerEntry 2 }
radiusAuthClientServerPortNumber OBJECT-TYPE
SYNTAX Integer32 (0..65535)
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The UDP port the client is using to send requests to
this server."
REFERENCE "RFC 2865 section 3"
::= { radiusAuthServerEntry 3 }
radiusAuthClientRoundTripTime OBJECT-TYPE
SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The time interval (in hundredths of a second) between
the most recent Access-Reply/Access-Challenge and the
Access-Request that matched it from this RADIUS
authentication server."
::= { radiusAuthServerEntry 4 }
-- Request/Response statistics
--
-- TotalIncomingPackets = Accepts + Rejects + Challenges +
-- UnknownTypes
--
-- TotalIncomingPackets - MalformedResponses -
-- BadAuthenticators - UnknownTypes - PacketsDropped =
-- Successfully received
--
-- AccessRequests + PendingRequests + ClientTimeouts =
-- Successfully received
--
--
radiusAuthClientAccessRequests OBJECT-TYPE
SYNTAX Counter32
UNITS "packets"
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The number of RADIUS Access-Request packets sent
to this server. This does not include retransmissions."
REFERENCE "RFC 2865 section 4.1"
::= { radiusAuthServerEntry 5 }
radiusAuthClientAccessRetransmissions OBJECT-TYPE
SYNTAX Counter32
UNITS "packets"
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The number of RADIUS Access-Request packets
retransmitted to this RADIUS authentication server."
REFERENCE "RFC 2865 sections 2.5, 4.1"
::= { radiusAuthServerEntry 6 }
radiusAuthClientAccessAccepts OBJECT-TYPE
SYNTAX Counter32
UNITS "packets"
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The number of RADIUS Access-Accept packets
(valid or invalid) received from this server."
REFERENCE "RFC 2865 section 4.2"
::= { radiusAuthServerEntry 7 }
radiusAuthClientAccessRejects OBJECT-TYPE
SYNTAX Counter32
UNITS "packets"
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The number of RADIUS Access-Reject packets
(valid or invalid) received from this server."
REFERENCE "RFC 2865 section 4.3"
::= { radiusAuthServerEntry 8 }
radiusAuthClientAccessChallenges OBJECT-TYPE
SYNTAX Counter32
UNITS "packets"
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The number of RADIUS Access-Challenge packets
(valid or invalid) received from this server."
REFERENCE "RFC 2865 section 4.4"
::= { radiusAuthServerEntry 9 }
-- "Access-Response" includes an Access-Accept, Access-Challenge
-- or Access-Reject
radiusAuthClientMalformedAccessResponses OBJECT-TYPE
SYNTAX Counter32
UNITS "packets"
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The number of malformed RADIUS Access-Response
packets received from this server.
Malformed packets include packets with
an invalid length. Bad authenticators or
Message Authenticator attributes or unknown types
are not included as malformed access responses."
::= { radiusAuthServerEntry 10 }
radiusAuthClientBadAuthenticators OBJECT-TYPE
SYNTAX Counter32
UNITS "packets"
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The number of RADIUS Access-Response packets
containing invalid authenticators or Message
Authenticator attributes received from this server."
REFERENCE "RFC 2865 section 3, RFC 2869 section 5.14"
::= { radiusAuthServerEntry 11 }
radiusAuthClientPendingRequests OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The number of RADIUS Access-Request packets
destined for this server that have not yet timed out
or received a response. This variable is incremented
when an Access-Request is sent and decremented due to
receipt of an Access-Accept, Access-Reject,
Access-Challenge, timeout, or retransmission."
REFERENCE "RFC 2865 section 2"
::= { radiusAuthServerEntry 12 }
radiusAuthClientTimeouts OBJECT-TYPE
SYNTAX Counter32
UNITS "timeouts"
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The number of authentication 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 a Request as well as a timeout."
REFERENCE "RFC 2865 section 2, RFC 2869 section 2.3.2"
::= { radiusAuthServerEntry 13 }
radiusAuthClientUnknownTypes OBJECT-TYPE
SYNTAX Counter32
UNITS "packets"
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The number of RADIUS packets of unknown type that
were received from this server on the authentication
port."
::= { radiusAuthServerEntry 14 }
radiusAuthClientPacketsDropped OBJECT-TYPE
SYNTAX Counter32
UNITS "packets"
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The number of RADIUS packets that were
received from this server on the authentication port
and dropped for some other reason."
::= { radiusAuthServerEntry 15 }
-- New MIB Objects in this revision
radiusAuthServerExtTable OBJECT-TYPE
SYNTAX SEQUENCE OF RadiusAuthServerExtEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The (conceptual) table listing the RADIUS authentication
servers with which the client shares a secret."
::= { radiusAuthClient 4 }
radiusAuthServerExtEntry OBJECT-TYPE
SYNTAX RadiusAuthServerExtEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry (conceptual row) representing a RADIUS