Network Working Group S. De Cnodder

Network Working Group S. De Cnodder
Request for Comments: 4673 Alcatel
Category: Informational N. Jonnala
M. Chiba
Cisco Systems, Inc.
September 2006

RADIUS Dynamic Authorization Server MIB

Status of This Memo

This memo provides information for the Internet community. It does
not specify an Internet standard of any kind. Distribution of this
memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (2006).

Abstract

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 the Remote Authentication Dial-In User
Service (RADIUS) (RFC 2865) Dynamic Authorization Server (DAS)
functions that support the dynamic authorization extensions as
defined in RFC 3576.

Table of Contents

1. Introduction ....................................................2
1.1. Requirements Notation ......................................2
1.2. Terminology ................................................2
2. The Internet-Standard Management Framework ......................2
3. Overview ........................................................3
4. RADIUS Dynamic Authorization Server MIB Definitions .............5
5. Security Considerations ........................................20
6. IANA Considerations ............................................21
7. Acknowledgements ...............................................21
8. References .....................................................21
8.1. Normative References ......................................21
8.2. Informative References ....................................22

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RFC 4673 RADIUS Dynamic Authorization Server MIB September 2006

1. Introduction

This memo defines a portion of the Management Information Base (MIB)
for use with network management protocols in the Internet community.
It is becoming increasingly important to support Dynamic
Authorization extensions on the network access server (NAS) devices
to handle the Disconnect and Change-of-Authorization (CoA) messages
as described in [RFC3576]. As a result, the effective management of
RADIUS Dynamic Authorization entities is of considerable importance.
This RADIUS Dynamic Authorization Server (DAS) MIB complements the
managed objects used for managing RADIUS authentication and
accounting clients as described in [RFC4668] and [RFC4670],
respectively.

1.1. Requirements Notation

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 [RFC2119].

1.2. Terminology

Dynamic Authorization Server (DAS)

The component that resides on the NAS that processes the Disconnect
and Change-of-Authorization (CoA) Request packets [RFC3576] sent by
the Dynamic Authorization Client.

Dynamic Authorization Client (DAC)

The component that sends Disconnect and CoA-Request packets to the
Dynamic Authorization Server. Although this component often resides
on the RADIUS server, it is also possible for it to be located on a
separate host, such as a Rating Engine.

Dynamic Authorization Server Port

The UDP port on which the Dynamic Authorization Server listens for
the Disconnect and CoA requests sent by the Dynamic Authorization
Client.

2. 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
[RFC3410].

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RFC 4673 RADIUS Dynamic Authorization Server MIB September 2006

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].

3. Overview

"Dynamic Authorization Extensions to RADIUS" [RFC3576] defines the
operation of Disconnect-Request, Disconnect-ACK, Disconnect-NAK,
CoA-Request, CoA-ACK, and CoA-NAK packets. Typically, NAS devices
implement the DAS function, and thus would be expected to implement
the RADIUS Dynamic Authorization Server MIB, whereas DACs implement
the client function and thus would be expected to implement the
RADIUS Dynamic Authorization Client MIB.

However, it is possible for a RADIUS Dynamic Authorization entity to
perform both client and server functions. For example, a RADIUS
proxy may act as a DAS to one or more DACs while simultaneously
acting as a DAC to one or more DASs. In such situations, it is
expected that RADIUS entities combining client and server
functionality will support both the client and server MIBs.

This memo describes the MIB for Dynamic Authorization Servers and
relates to the following documents as follows:

[RFC4668] describes the MIB for a RADIUS Auth Client MIB.

[RFC4669] describes the MIB for a RADIUS Auth Server MIB.

[RFC4670] describes the MIB for a RADIUS Acct Client MIB.

[RFC4671] describes the MIB for a RADIUS Acct Server MIB.

[RFC4672] describes the MIB for a RADIUS Dynamic Auth Client.

A NAS typically implements the MIBs for a RADIUS Authentication
Client, a RADIUS accounting client, and a RADIUS Dynamic
Authorization Server. However, any one MIB can be implemented
without implementing any of the other MIBs; i.e., the MIBs have no
dependencies on each other. A typical case would be for a device to
implement the MIBs RADIUS authentication server, RADIUS accounting
server, and RADIUS Dynamic Authorization Client. A RADIUS proxy
might implement any, all, or a subset of the MIBs listed above and
the MIB as defined in this document.

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RFC 4673 RADIUS Dynamic Authorization Server MIB September 2006

+---------------+ +---------------+
User 1----| | Disconnect-Request | |
| Dynamic | CoA-Request | Dynamic |
User 2----| Authorization |<---------------------| Authorization |
| Server |--------------------->| Client |
User 3----| (DAS) | Disconnect-Ack | (DAC) |
| | Disconnect-NAK | |
+---------------+ CoA-Ack/CoA-NAK +---------------+

Figure 1. Mapping of clients and servers

This MIB module for the Dynamic Authorization Server contains the
following:

1. Three scalar objects.

2. One Dynamic Authorization Client Table. This table contains one
row for each DAC with which the DAS shares a secret.

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RFC 4673 RADIUS Dynamic Authorization Server MIB September 2006

4. RADIUS Dynamic Authorization Server MIB Definitions

RADIUS-DYNAUTH-SERVER-MIB DEFINITIONS ::= BEGIN

IMPORTS
MODULE-IDENTITY, OBJECT-TYPE,
Counter32, Integer32, mib-2,
TimeTicks FROM SNMPv2-SMI -- [RFC2578]
SnmpAdminString FROM SNMP-FRAMEWORK-MIB -- [RFC3411]
InetAddressType,
InetAddress FROM INET-ADDRESS-MIB -- [RFC4001]
MODULE-COMPLIANCE,
OBJECT-GROUP FROM SNMPv2-CONF; -- [RFC2580]

radiusDynAuthServerMIB MODULE-IDENTITY
LAST-UPDATED "200608290000Z" -- 29 August 2006
ORGANIZATION "IETF RADEXT Working Group"
CONTACT-INFO
" Stefaan De Cnodder
Alcatel
Francis Wellesplein 1
B-2018 Antwerp
Belgium

Phone: +32 3 240 85 15
EMail: [email protected]

Nagi Reddy Jonnala
Cisco Systems, Inc.
Divyasree Chambers, B Wing,
O'Shaugnessy Road,
Bangalore-560027, India.

Phone: +91 94487 60828
EMail: [email protected]

Murtaza Chiba
Cisco Systems, Inc.
170 West Tasman Dr.
San Jose CA, 95134

Phone: +1 408 525 7198
EMail: [email protected] "
DESCRIPTION
"The MIB module for entities implementing the server
side of the Dynamic Authorization Extensions to the
Remote Authentication Dial-In User Service (RADIUS)
protocol. Copyright (C) The Internet Society (2006).

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RFC 4673 RADIUS Dynamic Authorization Server MIB September 2006

Initial version as published in RFC 4673; for full
legal notices see the RFC itself."

REVISION "200608290000Z" -- 29 August 2006
DESCRIPTION "Initial version as published in RFC 4673."
::= { mib-2 146 }

radiusDynAuthServerMIBObjects OBJECT IDENTIFIER ::=
{ radiusDynAuthServerMIB 1 }

radiusDynAuthServerScalars OBJECT IDENTIFIER ::=
{ radiusDynAuthServerMIBObjects 1 }

radiusDynAuthServerDisconInvalidClientAddresses OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Disconnect-Request packets received from
unknown addresses. This counter may experience a
discontinuity when the DAS module (re)starts, as
indicated by the value of
radiusDynAuthServerCounterDiscontinuity."
::= { radiusDynAuthServerScalars 1 }

radiusDynAuthServerCoAInvalidClientAddresses OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of CoA-Request packets received from unknown
addresses. This counter may experience a discontinuity
when the DAS module (re)starts, as indicated by the
value of radiusDynAuthServerCounterDiscontinuity."
::= { radiusDynAuthServerScalars 2 }

radiusDynAuthServerIdentifier OBJECT-TYPE
SYNTAX SnmpAdminString
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The NAS-Identifier of the RADIUS Dynamic Authorization
Server. This is not necessarily the same as sysName in
MIB II."
REFERENCE
"RFC 2865, Section 5.32, NAS-Identifier."
::= { radiusDynAuthServerScalars 3 }

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radiusDynAuthClientTable OBJECT-TYPE
SYNTAX SEQUENCE OF RadiusDynAuthClientEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The (conceptual) table listing the RADIUS Dynamic
Authorization Clients with which the server shares a
secret."
::= { radiusDynAuthServerMIBObjects 2 }

radiusDynAuthClientEntry OBJECT-TYPE
SYNTAX RadiusDynAuthClientEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry (conceptual row) representing one Dynamic
Authorization Client with which the server shares a
secret."
INDEX { radiusDynAuthClientIndex }
::= { radiusDynAuthClientTable 1 }

RadiusDynAuthClientEntry ::= SEQUENCE {
radiusDynAuthClientIndex Integer32,
radiusDynAuthClientAddressType InetAddressType,
radiusDynAuthClientAddress InetAddress,
radiusDynAuthServDisconRequests Counter32,
radiusDynAuthServDisconAuthOnlyRequests Counter32,
radiusDynAuthServDupDisconRequests Counter32,
radiusDynAuthServDisconAcks Counter32,
radiusDynAuthServDisconNaks Counter32,
radiusDynAuthServDisconNakAuthOnlyRequests Counter32,
radiusDynAuthServDisconNakSessNoContext Counter32,
radiusDynAuthServDisconUserSessRemoved Counter32,
radiusDynAuthServMalformedDisconRequests Counter32,
radiusDynAuthServDisconBadAuthenticators Counter32,
radiusDynAuthServDisconPacketsDropped Counter32,
radiusDynAuthServCoARequests Counter32,
radiusDynAuthServCoAAuthOnlyRequests Counter32,
radiusDynAuthServDupCoARequests Counter32,
radiusDynAuthServCoAAcks Counter32,
radiusDynAuthServCoANaks Counter32,
radiusDynAuthServCoANakAuthOnlyRequests Counter32,
radiusDynAuthServCoANakSessNoContext Counter32,
radiusDynAuthServCoAUserSessChanged Counter32,
radiusDynAuthServMalformedCoARequests Counter32,
radiusDynAuthServCoABadAuthenticators Counter32,
radiusDynAuthServCoAPacketsDropped Counter32,
radiusDynAuthServUnknownTypes Counter32,

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RFC 4673 RADIUS Dynamic Authorization Server MIB September 2006

radiusDynAuthServerCounterDiscontinuity TimeTicks
}

radiusDynAuthClientIndex OBJECT-TYPE
SYNTAX Integer32 (1..2147483647)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A number uniquely identifying each RADIUS Dynamic
Authorization Client with which this Dynamic
Authorization Server communicates. This number is
allocated by the agent implementing this MIB module
and is unique in this context."
::= { radiusDynAuthClientEntry 1 }

radiusDynAuthClientAddressType OBJECT-TYPE
SYNTAX InetAddressType
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The type of IP address of the RADIUS Dynamic
Authorization Client referred to in this table entry."
::= { radiusDynAuthClientEntry 2 }

radiusDynAuthClientAddress OBJECT-TYPE
SYNTAX InetAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The IP address value of the RADIUS Dynamic
Authorization Client referred to in this table entry,
using the version neutral IP address format. The type
of this address is determined by the value of
the radiusDynAuthClientAddressType object."
::= { radiusDynAuthClientEntry 3 }

radiusDynAuthServDisconRequests OBJECT-TYPE
SYNTAX Counter32
UNITS "requests"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS Disconnect-Requests received
from this Dynamic Authorization Client. This also
includes the RADIUS Disconnect-Requests that have a
Service-Type attribute with value 'Authorize Only'.
This counter may experience a discontinuity when the

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DAS module (re)starts as indicated by the value of
radiusDynAuthServerCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.1, Disconnect Messages (DM)."
::= { radiusDynAuthClientEntry 4 }

radiusDynAuthServDisconAuthOnlyRequests OBJECT-TYPE
SYNTAX Counter32
UNITS "requests"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS Disconnect-Requests that include
a Service-Type attribute with value 'Authorize Only'
received from this Dynamic Authorization Client. This
counter may experience a discontinuity when the DAS
module (re)starts, as indicated by the value of
radiusDynAuthServerCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.1, Disconnect Messages (DM)."
::= { radiusDynAuthClientEntry 5 }

radiusDynAuthServDupDisconRequests OBJECT-TYPE
SYNTAX Counter32
UNITS "requests"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of duplicate RADIUS Disconnect-Request
packets received from this Dynamic Authorization
Client. This counter may experience a discontinuity
when the DAS module (re)starts, as indicated by the
value of radiusDynAuthServerCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.1, Disconnect Messages (DM)."
::= { radiusDynAuthClientEntry 6 }

radiusDynAuthServDisconAcks OBJECT-TYPE
SYNTAX Counter32
UNITS "replies"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS Disconnect-ACK packets sent to
this Dynamic Authorization Client. This counter may
experience a discontinuity when the DAS module
(re)starts, as indicated by the value of
radiusDynAuthServerCounterDiscontinuity."

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REFERENCE
"RFC 3576, Section 2.1, Disconnect Messages (DM)."
::= { radiusDynAuthClientEntry 7 }

radiusDynAuthServDisconNaks OBJECT-TYPE
SYNTAX Counter32
UNITS "replies"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS Disconnect-NAK packets
sent to this Dynamic Authorization Client. This
includes the RADIUS Disconnect-NAK packets sent
with a Service-Type attribute with value 'Authorize
Only' and the RADIUS Disconnect-NAK packets sent
because no session context was found. This counter
may experience a discontinuity when the DAS module
(re)starts, as indicated by the value of
radiusDynAuthServerCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.1, Disconnect Messages (DM)."
::= { radiusDynAuthClientEntry 8 }

radiusDynAuthServDisconNakAuthOnlyRequests OBJECT-TYPE
SYNTAX Counter32
UNITS "replies"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS Disconnect-NAK packets that
include a Service-Type attribute with value
'Authorize Only' sent to this Dynamic Authorization
Client. This counter may experience a discontinuity
when the DAS module (re)starts, as indicated by the
value of radiusDynAuthServerCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.1, Disconnect Messages (DM)."
::= { radiusDynAuthClientEntry 9 }

radiusDynAuthServDisconNakSessNoContext OBJECT-TYPE
SYNTAX Counter32
UNITS "replies"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS Disconnect-NAK packets
sent to this Dynamic Authorization Client
because no session context was found. This counter may

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experience a discontinuity when the DAS module
(re)starts, as indicated by the value of
radiusDynAuthServerCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.1, Disconnect Messages (DM)."
::= { radiusDynAuthClientEntry 10 }

radiusDynAuthServDisconUserSessRemoved OBJECT-TYPE
SYNTAX Counter32
UNITS "sessions"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of user sessions removed for the
Disconnect-Requests received from this
Dynamic Authorization Client. Depending on site-
specific policies, a single Disconnect request
can remove multiple user sessions. In cases where
this Dynamic Authorization Server has no
knowledge of the number of user sessions that
are affected by a single request, each such
Disconnect-Request will count as a single
affected user session only. This counter may experience
a discontinuity when the DAS module (re)starts, as
indicated by the value of
radiusDynAuthServerCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.1, Disconnect Messages (DM)."
::= { radiusDynAuthClientEntry 11 }

radiusDynAuthServMalformedDisconRequests OBJECT-TYPE
SYNTAX Counter32
UNITS "requests"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of malformed RADIUS Disconnect-Request
packets received from this Dynamic Authorization
Client. Bad authenticators and unknown types are not
included as malformed Disconnect-Requests. This counter
may experience a discontinuity when the DAS module
(re)starts, as indicated by the value of
radiusDynAuthServerCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.1, Disconnect Messages (DM), and
Section 2.3, Packet Format."
::= { radiusDynAuthClientEntry 12 }

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radiusDynAuthServDisconBadAuthenticators OBJECT-TYPE
SYNTAX Counter32
UNITS "requests"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS Disconnect-Request packets
that contained an invalid Authenticator field
received from this Dynamic Authorization Client. This
counter may experience a discontinuity when the DAS
module (re)starts, as indicated by the value of
radiusDynAuthServerCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.1, Disconnect Messages (DM), and
Section 2.3, Packet Format."
::= { radiusDynAuthClientEntry 13 }

radiusDynAuthServDisconPacketsDropped OBJECT-TYPE
SYNTAX Counter32
UNITS "requests"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of incoming Disconnect-Requests
from this Dynamic Authorization Client silently
discarded by the server application for some reason
other than malformed, bad authenticators, or unknown
types. This counter may experience a discontinuity
when the DAS module (re)starts, as indicated by the
value of radiusDynAuthServerCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.1, Disconnect Messages (DM), and
Section 2.3, Packet Format."
::= { radiusDynAuthClientEntry 14 }

radiusDynAuthServCoARequests OBJECT-TYPE
SYNTAX Counter32
UNITS "requests"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS CoA-requests received from this
Dynamic Authorization Client. This also includes
the CoA requests that have a Service-Type attribute
with value 'Authorize Only'. This counter may
experience a discontinuity when the DAS module
(re)starts, as indicated by the value of
radiusDynAuthServerCounterDiscontinuity."

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REFERENCE
"RFC 3576, Section 2.2, Change-of-Authorization
Messages (CoA)."
::= { radiusDynAuthClientEntry 15 }

radiusDynAuthServCoAAuthOnlyRequests OBJECT-TYPE
SYNTAX Counter32
UNITS "requests"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS CoA-requests that include a
Service-Type attribute with value 'Authorize Only'
received from this Dynamic Authorization Client. This
counter may experience a discontinuity when the DAS
module (re)starts, as indicated by the value of
radiusDynAuthServerCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.2, Change-of-Authorization
Messages (CoA)."
::= { radiusDynAuthClientEntry 16 }

radiusDynAuthServDupCoARequests OBJECT-TYPE
SYNTAX Counter32
UNITS "requests"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of duplicate RADIUS CoA-Request packets
received from this Dynamic Authorization Client. This
counter may experience a discontinuity when the DAS
module (re)starts, as indicated by the value of
radiusDynAuthServerCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.2, Change-of-Authorization
Messages (CoA)."
::= { radiusDynAuthClientEntry 17 }

radiusDynAuthServCoAAcks OBJECT-TYPE
SYNTAX Counter32
UNITS "replies"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS CoA-ACK packets sent to this
Dynamic Authorization Client. This counter may
experience a discontinuity when the DAS module

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(re)starts, as indicated by the value of
radiusDynAuthServerCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.2, Change-of-Authorization
Messages (CoA)."
::= { radiusDynAuthClientEntry 18 }

radiusDynAuthServCoANaks OBJECT-TYPE
SYNTAX Counter32
UNITS "replies"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS CoA-NAK packets sent to
this Dynamic Authorization Client. This includes
the RADIUS CoA-NAK packets sent with a Service-Type
attribute with value 'Authorize Only' and the RADIUS
CoA-NAK packets sent because no session context was
found. This counter may experience a discontinuity
when the DAS module (re)starts, as indicated by the
value of radiusDynAuthServerCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.2, Change-of-Authorization
Messages (CoA)."
::= { radiusDynAuthClientEntry 19 }

radiusDynAuthServCoANakAuthOnlyRequests OBJECT-TYPE
SYNTAX Counter32
UNITS "replies"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS CoA-NAK packets that include a
Service-Type attribute with value 'Authorize Only'
sent to this Dynamic Authorization Client. This counter
may experience a discontinuity when the DAS module
(re)starts, as indicated by the value of
radiusDynAuthServerCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.2, Change-of-Authorization
Messages (CoA)."
::= { radiusDynAuthClientEntry 20 }

radiusDynAuthServCoANakSessNoContext OBJECT-TYPE
SYNTAX Counter32
UNITS "replies"
MAX-ACCESS read-only
STATUS current

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DESCRIPTION
"The number of RADIUS CoA-NAK packets sent to this
Dynamic Authorization Client because no session context
was found. This counter may experience a discontinuity
when the DAS module (re)starts, as indicated by the
value of radiusDynAuthServerCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.2, Change-of-Authorization
Messages (CoA)."
::= { radiusDynAuthClientEntry 21 }

radiusDynAuthServCoAUserSessChanged OBJECT-TYPE
SYNTAX Counter32
UNITS "sessions"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of user sessions authorization
changed for the CoA-Requests received from this
Dynamic Authorization Client. Depending on site-
specific policies, a single CoA request can change
multiple user sessions' authorization. In cases where
this Dynamic Authorization Server has no knowledge of
the number of user sessions that are affected by a
single request, each such CoA-Request will
count as a single affected user session only. This
counter may experience a discontinuity when the DAS
module (re)starts, as indicated by the value of
radiusDynAuthServerCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.2, Change-of-Authorization
Messages (CoA)."
::= { radiusDynAuthClientEntry 22 }

radiusDynAuthServMalformedCoARequests OBJECT-TYPE
SYNTAX Counter32
UNITS "requests"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of malformed RADIUS CoA-Request packets
received from this Dynamic Authorization Client. Bad
authenticators and unknown types are not included as
malformed CoA-Requests. This counter may experience a
discontinuity when the DAS module (re)starts, as
indicated by the value of
radiusDynAuthServerCounterDiscontinuity."
REFERENCE

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"RFC 3576, Section 2.2, Change-of-Authorization
Messages (CoA), and Section 2.3, Packet Format."
::= { radiusDynAuthClientEntry 23 }

radiusDynAuthServCoABadAuthenticators OBJECT-TYPE
SYNTAX Counter32
UNITS "requests"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS CoA-Request packets that
contained an invalid Authenticator field received
from this Dynamic Authorization Client. This counter
may experience a discontinuity when the DAS module
(re)starts, as indicated by the value of
radiusDynAuthServerCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.2, Change-of-Authorization
Messages (CoA), and Section 2.3, Packet Format."
::= { radiusDynAuthClientEntry 24 }

radiusDynAuthServCoAPacketsDropped OBJECT-TYPE
SYNTAX Counter32
UNITS "requests"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of incoming CoA packets from this
Dynamic Authorization Client silently discarded
by the server application for some reason other than
malformed, bad authenticators, or unknown types. This
counter may experience a discontinuity when the DAS
module (re)starts, as indicated by the value of
radiusDynAuthServerCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.2, Change-of-Authorization
Messages (CoA), and Section 2.3, Packet Format."
::= { radiusDynAuthClientEntry 25 }

radiusDynAuthServUnknownTypes OBJECT-TYPE
SYNTAX Counter32
UNITS "requests"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of incoming packets of unknown types that
were received on the Dynamic Authorization port. This
counter may experience a discontinuity when the DAS

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RFC 4673 RADIUS Dynamic Authorization Server MIB September 2006

module (re)starts, as indicated by the value of
radiusDynAuthServerCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.3, Packet Format."
::= { radiusDynAuthClientEntry 26 }

radiusDynAuthServerCounterDiscontinuity OBJECT-TYPE
SYNTAX TimeTicks
UNITS "hundredths of a second"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The time (in hundredths of a second) since the
last counter discontinuity. A discontinuity may
be the result of a reinitialization of the DAS
module within the managed entity."
::= { radiusDynAuthClientEntry 27 }

-- conformance information

radiusDynAuthServerMIBConformance
OBJECT IDENTIFIER ::= { radiusDynAuthServerMIB 2 }
radiusDynAuthServerMIBCompliances
OBJECT IDENTIFIER ::= { radiusDynAuthServerMIBConformance 1 }
radiusDynAuthServerMIBGroups
OBJECT IDENTIFIER ::= { radiusDynAuthServerMIBConformance 2 }

-- compliance statements

radiusAuthServerMIBCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"The compliance statement for entities implementing
the RADIUS Dynamic Authorization Server. Implementation
of this module is for entities that support IPv4 and/or
IPv6."
MODULE -- this module
MANDATORY-GROUPS { radiusDynAuthServerMIBGroup }

OBJECT radiusDynAuthClientAddressType
SYNTAX InetAddressType { ipv4(1), ipv6(2) }
DESCRIPTION
"An implementation is only required to support IPv4 and
globally unique IPv6 addresses."

OBJECT radiusDynAuthClientAddress
SYNTAX InetAddress (SIZE(4|16))

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RFC 4673 RADIUS Dynamic Authorization Server MIB September 2006

DESCRIPTION
"An implementation is only required to support IPv4 and
globally unique IPv6 addresses."

GROUP radiusDynAuthServerAuthOnlyGroup
DESCRIPTION
"Only required for Dynamic Authorization Clients that
are supporting Service-Type attributes with value
'Authorize-Only'."

GROUP radiusDynAuthServerNoSessGroup
DESCRIPTION
"This group is not required if the Dynamic
Authorization Server cannot easily determine whether
a session exists (e.g., in case of a RADIUS
proxy)."

::= { radiusDynAuthServerMIBCompliances 1 }

-- units of conformance

radiusDynAuthServerMIBGroup OBJECT-GROUP
OBJECTS { radiusDynAuthServerDisconInvalidClientAddresses,
radiusDynAuthServerCoAInvalidClientAddresses,
radiusDynAuthServerIdentifier,
radiusDynAuthClientAddressType,
radiusDynAuthClientAddress,
radiusDynAuthServDisconRequests,
radiusDynAuthServDupDisconRequests,
radiusDynAuthServDisconAcks,
radiusDynAuthServDisconNaks,
radiusDynAuthServDisconUserSessRemoved,
radiusDynAuthServMalformedDisconRequests,
radiusDynAuthServDisconBadAuthenticators,
radiusDynAuthServDisconPacketsDropped,
radiusDynAuthServCoARequests,
radiusDynAuthServDupCoARequests,
radiusDynAuthServCoAAcks,
radiusDynAuthServCoANaks,
radiusDynAuthServCoAUserSessChanged,
radiusDynAuthServMalformedCoARequests,
radiusDynAuthServCoABadAuthenticators,
radiusDynAuthServCoAPacketsDropped,
radiusDynAuthServUnknownTypes,
radiusDynAuthServerCounterDiscontinuity
}
STATUS current

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RFC 4673 RADIUS Dynamic Authorization Server MIB September 2006

DESCRIPTION
"The collection of objects providing management of
a RADIUS Dynamic Authorization Server."
::= { radiusDynAuthServerMIBGroups 1 }

radiusDynAuthServerAuthOnlyGroup OBJECT-GROUP
OBJECTS { radiusDynAuthServDisconAuthOnlyRequests,
radiusDynAuthServDisconNakAuthOnlyRequests,
radiusDynAuthServCoAAuthOnlyRequests,
radiusDynAuthServCoANakAuthOnlyRequests
}
STATUS current
DESCRIPTION
"The collection of objects supporting the RADIUS
messages including Service-Type attribute with
value 'Authorize Only'."
::= { radiusDynAuthServerMIBGroups 2 }

radiusDynAuthServerNoSessGroup OBJECT-GROUP
OBJECTS { radiusDynAuthServDisconNakSessNoContext,
radiusDynAuthServCoANakSessNoContext
}
STATUS current
DESCRIPTION
"The collection of objects supporting the RADIUS
messages that are referring to non-existing sessions."
::= { radiusDynAuthServerMIBGroups 3 }

END

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RFC 4673 RADIUS Dynamic Authorization Server MIB September 2006

5. Security Considerations

There are no management objects defined in this MIB module that have
a MAX-ACCESS clause of read-write and/or read-create. So, if this
MIB module is implemented correctly, then there is no risk that an
intruder can alter or create any management objects of this MIB
module via direct SNMP SET operations.

Some of the readable objects in this MIB module (i.e., objects with a
MAX-ACCESS other than not-accessible) may be considered sensitive or
vulnerable in some network environments. It is thus important to
control even GET and/or NOTIFY access to these objects and possibly
to even encrypt the values of these objects when sending them over
the network via SNMP. These are the tables and objects and their
sensitivity/vulnerability:

radiusDynAuthClientAddress and radiusDynAuthClientAddressType

These can be used to determine the address of the DAC with which
the DAS is communicating. This information could be useful in
mounting an attack on the DAC.

radiusDynAuthServerIdentifier

This can be used to determine the Identifier of the DAS. This
information could be useful in impersonating the DAS.

SNMP versions prior to SNMPv3 did not include adequate security.
Even if the network itself is secure (for example by using IPsec),
even then, 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 module.

It is RECOMMENDED that implementers consider the security features as
provided by the SNMPv3 framework (see [RFC3410], section 8),
including full support for the SNMPv3 cryptographic mechanisms (for
authentication and privacy).

Further, deployment of SNMP versions prior to SNMPv3 is NOT
RECOMMENDED. Instead, it is RECOMMENDED to deploy SNMPv3 and to
enable cryptographic security. It is then a customer/operator
responsibility to ensure that the SNMP entity giving access to an
instance of this MIB module is properly configured to give access to
the objects only to those principals (users) that have legitimate
rights to indeed GET or SET (change/create/delete) them.

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RFC 4673 RADIUS Dynamic Authorization Server MIB September 2006

6. IANA Considerations

The IANA has assigned OID number 146 under mib-2.

7. Acknowledgements

The authors would like to acknowledge the following people for their
comments on this document: Bernard Aboba, Alan DeKok, David Nelson,
Anjaneyulu Pata, Dan Romascanu, Juergen Schoenwaelder, Greg Weber,
Bert Wijnen, and Glen Zorn.

8. References

8.1. Normative References

[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.

[RFC2578] McCloghrie, K., Perkins, D., and J. Schoenwaelder,
"Structure of Management Information Version 2 (SMIv2)",
STD 58, RFC 2578, April 1999.

[RFC2579] McCloghrie, K., Perkins, D., and J. Schoenwaelder,
"Textual Conventions for SMIv2", STD 58, RFC 2579, April
1999.

[RFC2580] McCloghrie, K., Perkins, D., and J. Schoenwaelder,
"Conformance Statements for SMIv2", STD 58, RFC 2580,
April 1999.

[RFC3411] Harrington, D., Presuhn, R., and B. Wijnen, "An
Architecture for Describing Simple Network Management
Protocol (SNMP) Management Frameworks", STD 62, RFC 3411,
December 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.

[RFC4001] Daniele, M., Haberman, B., Routhier, S., and J.
Schoenwaelder, "Textual Conventions for Internet Network
Addresses", RFC 4001, February 2005.

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RFC 4673 RADIUS Dynamic Authorization Server MIB September 2006

8.2. Informative References

[RFC2865] Rigney, C., Willens, S., Rubens, A., and W. Simpson,
"Remote Authentication Dial In User Service (RADIUS)", RFC
2865, June 2000.

[RFC3410] Case, J., Mundy, R., Partain, D., and B. Stewart,
"Introduction and Applicability Statements for Internet-
Standard Management Framework", RFC 3410, December 2002.

[RFC4668] Nelson, D., "RADIUS Authentication Client MIB for IPv6",
RFC 4668, August 2006.

[RFC4669] Nelson, D., "RADIUS Authentication Server MIB for IPv6",
RFC 4669, August 2006.

[RFC4670] Nelson, D., "RADIUS Accounting Client MIB for IPv6", RFC
4670, August 2006.

[RFC4671] Nelson, D., "RADIUS Accounting Server MIB for IPv6", RFC
4671, August 2006.

[RFC4672] De Cnodder, S., Jonnala, N., and M. Chiba, "RADIUS Dynamic
Authorization Client MIB", RFC 4672, September 2006.

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RFC 4673 RADIUS Dynamic Authorization Server MIB September 2006

Authors' Addresses

Stefaan De Cnodder
Alcatel
Francis Wellesplein 1
B-2018 Antwerp
Belgium

Phone: +32 3 240 85 15
EMail: [email protected]

Nagi Reddy Jonnala
Cisco Systems, Inc.
Divyasree Chambers, B Wing, O'Shaugnessy Road
Bangalore-560027, India

Phone: +91 94487 60828
EMail: [email protected]

Murtaza Chiba
Cisco Systems, Inc.
170 West Tasman Dr.
San Jose CA, 95134

Phone: +1 408 525 7198
EMail: [email protected]

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RFC 4673 RADIUS Dynamic Authorization Server MIB September 2006

Full Copyright Statement

Copyright (C) The Internet Society (2006).

This document is subject to the rights, licenses and restrictions
contained in BCP 78, and except as set forth therein, the authors
retain all their rights.

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OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY AND THE INTERNET
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