Network Working Group S. De Cnodder

Network Working Group S. De Cnodder
Request for Comments: 4672 Alcatel
Category: Informational N. Jonnala
M. Chiba
Cisco Systems, Inc.
September 2006

RADIUS Dynamic Authorization Client 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) (RFC2865) Dynamic Authorization Client (DAC)
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 ......................3
3. Overview ........................................................3
4. RADIUS Dynamic Authorization Client MIB Definitions .............3
5. Security Considerations ........................................19
6. IANA Considerations ............................................20
7. Acknowledgements ...............................................20
8. References .....................................................21
8.1. Normative References ......................................21
8.2. Informative References ....................................21

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RFC 4672 RADIUS Dynamic Authorization Client 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.
In particular, it describes the Remote Authentication Dial-In User
Service (RADIUS) [RFC2865] Dynamic Authorization Client (DAC)
functions that support the dynamic authorization extensions as
defined in RFC 3576.

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 Client MIB complements the managed
objects used for managing RADIUS authentication and accounting
servers, as described in [RFC4669] and [RFC4671], 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 this component 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.

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RFC 4672 RADIUS Dynamic Authorization Client MIB September 2006

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].

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. [RFC4673] defines the
Dynamic Authorization Server MIB and the relationship with other MIB
modules. This MIB module for the Dynamic Authorization Client
contains the following:

1. Two scalar objects

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

4. RADIUS Dynamic Authorization Client MIB Definitions

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

IMPORTS
MODULE-IDENTITY, OBJECT-TYPE,
Counter32, Gauge32, Integer32,
mib-2, TimeTicks FROM SNMPv2-SMI -- [RFC2578]
SnmpAdminString FROM SNMP-FRAMEWORK-MIB -- [RFC3411]
InetAddressType, InetAddress,
InetPortNumber FROM INET-ADDRESS-MIB -- [RFC4001]
MODULE-COMPLIANCE,
OBJECT-GROUP FROM SNMPv2-CONF; -- [RFC2580]

radiusDynAuthClientMIB MODULE-IDENTITY
LAST-UPDATED "200608290000Z" -- 29 August 2006
ORGANIZATION "IETF RADEXT Working Group"
CONTACT-INFO
" Stefaan De Cnodder

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RFC 4672 RADIUS Dynamic Authorization Client MIB September 2006

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 client
side of the Dynamic Authorization Extensions to the
Remote Authentication Dial-In User Service (RADIUS)
protocol. Copyright (C) The Internet Society (2006).
Initial version as published in RFC 4672;
for full legal notices see the RFC itself."

REVISION "200609290000Z" -- 29 August 2006
DESCRIPTION "Initial version as published in RFC 4672"
::= { mib-2 145 }

radiusDynAuthClientMIBObjects OBJECT IDENTIFIER ::=
{ radiusDynAuthClientMIB 1 }

radiusDynAuthClientScalars OBJECT IDENTIFIER ::=
{ radiusDynAuthClientMIBObjects 1 }

radiusDynAuthClientDisconInvalidServerAddresses OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Disconnect-Ack and Disconnect-NAK packets

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received from unknown addresses. This counter may
experience a discontinuity when the DAC module
(re)starts, as indicated by the value of
radiusDynAuthClientCounterDiscontinuity."
::= { radiusDynAuthClientScalars 1 }

radiusDynAuthClientCoAInvalidServerAddresses OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of CoA-Ack and CoA-NAK packets received from
unknown addresses. Disconnect-NAK packets received
from unknown addresses. This counter may experience a
discontinuity when the DAC module (re)starts, as
indicated by the value of
radiusDynAuthClientCounterDiscontinuity."
::= { radiusDynAuthClientScalars 2 }

radiusDynAuthServerTable OBJECT-TYPE
SYNTAX SEQUENCE OF RadiusDynAuthServerEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The (conceptual) table listing the RADIUS Dynamic
Authorization Servers with which the client shares a
secret."
::= { radiusDynAuthClientMIBObjects 2 }

radiusDynAuthServerEntry OBJECT-TYPE
SYNTAX RadiusDynAuthServerEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry (conceptual row) representing one Dynamic
Authorization Server with which the client shares a
secret."
INDEX { radiusDynAuthServerIndex }
::= { radiusDynAuthServerTable 1 }

RadiusDynAuthServerEntry ::= SEQUENCE {
radiusDynAuthServerIndex Integer32,
radiusDynAuthServerAddressType InetAddressType,
radiusDynAuthServerAddress InetAddress,
radiusDynAuthServerClientPortNumber InetPortNumber,
radiusDynAuthServerID SnmpAdminString,
radiusDynAuthClientRoundTripTime TimeTicks,
radiusDynAuthClientDisconRequests Counter32,

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radiusDynAuthClientDisconAuthOnlyRequests Counter32,
radiusDynAuthClientDisconRetransmissions Counter32,
radiusDynAuthClientDisconAcks Counter32,
radiusDynAuthClientDisconNaks Counter32,
radiusDynAuthClientDisconNakAuthOnlyRequest Counter32,
radiusDynAuthClientDisconNakSessNoContext Counter32,
radiusDynAuthClientMalformedDisconResponses Counter32,
radiusDynAuthClientDisconBadAuthenticators Counter32,
radiusDynAuthClientDisconPendingRequests Gauge32,
radiusDynAuthClientDisconTimeouts Counter32,
radiusDynAuthClientDisconPacketsDropped Counter32,
radiusDynAuthClientCoARequests Counter32,
radiusDynAuthClientCoAAuthOnlyRequest Counter32,
radiusDynAuthClientCoARetransmissions Counter32,
radiusDynAuthClientCoAAcks Counter32,
radiusDynAuthClientCoANaks Counter32,
radiusDynAuthClientCoANakAuthOnlyRequest Counter32,
radiusDynAuthClientCoANakSessNoContext Counter32,
radiusDynAuthClientMalformedCoAResponses Counter32,
radiusDynAuthClientCoABadAuthenticators Counter32,
radiusDynAuthClientCoAPendingRequests Gauge32,
radiusDynAuthClientCoATimeouts Counter32,
radiusDynAuthClientCoAPacketsDropped Counter32,
radiusDynAuthClientUnknownTypes Counter32,
radiusDynAuthClientCounterDiscontinuity TimeTicks
}

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

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

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radiusDynAuthServerAddress OBJECT-TYPE
SYNTAX InetAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The IP address value of the RADIUS Dynamic
Authorization Server 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
radiusDynAuthServerAddressType object."
::= { radiusDynAuthServerEntry 3 }

radiusDynAuthServerClientPortNumber OBJECT-TYPE
SYNTAX InetPortNumber (1..65535)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The UDP destination port that the RADIUS Dynamic
Authorization Client is using to send requests to this
server. The value zero is invalid."
::= { radiusDynAuthServerEntry 4 }

radiusDynAuthServerID OBJECT-TYPE
SYNTAX SnmpAdminString
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The NAS-Identifier of the RADIUS Dynamic Authorization
Server referred to in this table entry. This is not
necessarily the same as sysName in MIB II."
REFERENCE
"RFC 2865, Section 5.32, NAS-Identifier."
::= { radiusDynAuthServerEntry 5 }

radiusDynAuthClientRoundTripTime OBJECT-TYPE
SYNTAX TimeTicks
UNITS "hundredths of a second"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The time interval (in hundredths of a second) between
the most recent Disconnect or CoA request and the
receipt of the corresponding Disconnect or CoA reply.
A value of zero is returned if no reply has been
received yet from this server."
::= { radiusDynAuthServerEntry 6 }

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radiusDynAuthClientDisconRequests OBJECT-TYPE
SYNTAX Counter32
UNITS "requests"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS Disconnect-Requests sent
to this Dynamic Authorization Server. This also
includes the RADIUS Disconnect-Requests that have a
Service-Type attribute with value 'Authorize Only'.
Disconnect-NAK packets received from unknown addresses.
This counter may experience a discontinuity when the
DAC module (re)starts, as indicated by the value of
radiusDynAuthClientCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.1, Disconnect Messages (DM)."
::= { radiusDynAuthServerEntry 7 }

radiusDynAuthClientDisconAuthOnlyRequests 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'
sent to this Dynamic Authorization Server.
Disconnect-NAK packets received from unknown addresses.
This counter may experience a discontinuity when the
DAC module (re)starts, as indicated by the value of
radiusDynAuthClientCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.1, Disconnect Messages (DM)."
::= { radiusDynAuthServerEntry 8 }

radiusDynAuthClientDisconRetransmissions OBJECT-TYPE
SYNTAX Counter32
UNITS "retransmissions"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS Disconnect-request packets
retransmitted to this RADIUS Dynamic Authorization
Server. Disconnect-NAK packets received from unknown
addresses. This counter may experience a discontinuity
when the DAC module (re)starts, as indicated by the
value of radiusDynAuthClientCounterDiscontinuity."
REFERENCE

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"RFC 3576, Section 2.1, Disconnect Messages (DM)."
::= { radiusDynAuthServerEntry 9 }

radiusDynAuthClientDisconAcks OBJECT-TYPE
SYNTAX Counter32
UNITS "replies"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS Disconnect-ACK packets
received from this Dynamic Authorization Server. This
counter may experience a discontinuity when the DAC
module (re)starts, as indicated by the value of
radiusDynAuthClientCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.1, Disconnect Messages (DM)."
::= { radiusDynAuthServerEntry 10 }

radiusDynAuthClientDisconNaks OBJECT-TYPE
SYNTAX Counter32
UNITS "replies"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS Disconnect-NAK packets
received from this Dynamic Authorization Server.
This includes the RADIUS Disconnect-NAK packets
received with a Service-Type attribute with value
'Authorize Only' and the RADIUS Disconnect-NAK
packets received if no session context was found. This
counter may experience a discontinuity when the DAC
module (re)starts, as indicated by the value of
radiusDynAuthClientCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.1, Disconnect Messages (DM)."
::= { radiusDynAuthServerEntry 11 }

radiusDynAuthClientDisconNakAuthOnlyRequest 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' received from this Dynamic
Authorization Server. This counter may experience a
discontinuity when the DAC module (re)starts, as

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indicated by the value of
radiusDynAuthClientCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.1, Disconnect Messages (DM)."
::= { radiusDynAuthServerEntry 12 }

radiusDynAuthClientDisconNakSessNoContext OBJECT-TYPE
SYNTAX Counter32
UNITS "replies"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS Disconnect-NAK packets
received from this Dynamic Authorization Server
because no session context was found; i.e., it
includes an Error-Cause attribute with value 503
('Session Context Not Found'). This counter may
experience a discontinuity when the DAC module
(re)starts, as indicated by the value of
radiusDynAuthClientCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.1, Disconnect Messages (DM)."
::= { radiusDynAuthServerEntry 13 }

radiusDynAuthClientMalformedDisconResponses OBJECT-TYPE
SYNTAX Counter32
UNITS "replies"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of malformed RADIUS Disconnect-Ack and
Disconnect-NAK packets received from this Dynamic
Authorization Server. Bad authenticators and unknown
types are not included as malformed Disconnect-Ack and
Disconnect-NAK packets. This counter may experience a
discontinuity when the DAC module (re)starts, as
indicated by the value of
radiusDynAuthClientCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.1, Disconnect Messages (DM), and
Section 2.3, Packet Format."
::= { radiusDynAuthServerEntry 14 }

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

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DESCRIPTION
"The number of RADIUS Disconnect-Ack and Disconnect-NAK
packets that contained invalid Authenticator field
received from this Dynamic Authorization Server. This
counter may experience a discontinuity when the DAC
module (re)starts, as indicated by the value of
radiusDynAuthClientCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.1, Disconnect Messages (DM), and
Section 2.3, Packet Format."
::= { radiusDynAuthServerEntry 15 }

radiusDynAuthClientDisconPendingRequests OBJECT-TYPE
SYNTAX Gauge32
UNITS "requests"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS Disconnect-request packets
destined for this server that have not yet timed out
or received a response. This variable is incremented
when an Disconnect-Request is sent and decremented
due to receipt of a Disconnect-Ack, a Disconnect-NAK,
a timeout, or a retransmission."
REFERENCE
"RFC 3576, Section 2.1, Disconnect Messages (DM)."
::= { radiusDynAuthServerEntry 16 }

radiusDynAuthClientDisconTimeouts OBJECT-TYPE
SYNTAX Counter32
UNITS "timeouts"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Disconnect request timeouts to this
server. After a timeout, the client may retry to the
same server or give up. A retry to the same server is
counted as a retransmit and as a timeout. A send
to a different server is counted as a
Disconnect-Request and as a timeout. This counter
may experience a discontinuity when the DAC module
(re)starts, as indicated by the value of
radiusDynAuthClientCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.1, Disconnect Messages (DM)."
::= { radiusDynAuthServerEntry 17 }

radiusDynAuthClientDisconPacketsDropped OBJECT-TYPE

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SYNTAX Counter32
UNITS "replies"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of incoming Disconnect-Ack and
Disconnect-NAK packets from this Dynamic Authorization
Server silently discarded by the client application for
some reason other than malformed, bad authenticators,
or unknown types. This counter may experience a
discontinuity when the DAC module (re)starts, as
indicated by the value of
radiusDynAuthClientCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.1, Disconnect Messages (DM), and
Section 2.3, Packet Format."
::= { radiusDynAuthServerEntry 18 }

radiusDynAuthClientCoARequests OBJECT-TYPE
SYNTAX Counter32
UNITS "requests"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS CoA-Requests sent to this
Dynamic Authorization Server. This also includes
CoA requests that have a Service-Type attribute
with value 'Authorize Only'. This counter may
experience a discontinuity when the DAC module
(re)starts, as indicated by the value of
radiusDynAuthClientCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.2, Change-of-Authorization
Messages (CoA)."
::= { radiusDynAuthServerEntry 19 }

radiusDynAuthClientCoAAuthOnlyRequest 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'
sent to this Dynamic Authorization Client. This
counter may experience a discontinuity when the DAC
module (re)starts, as indicated by the value of
radiusDynAuthClientCounterDiscontinuity."

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REFERENCE
"RFC 3576, Section 2.2, Change-of-Authorization
Messages (CoA)."
::= { radiusDynAuthServerEntry 20 }

radiusDynAuthClientCoARetransmissions OBJECT-TYPE
SYNTAX Counter32
UNITS "retransmissions"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS CoA-request packets
retransmitted to this RADIUS Dynamic Authorization
Server. This counter may experience a discontinuity
when the DAC module (re)starts, as indicated by the
value of radiusDynAuthClientCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.2, Change-of-Authorization
Messages (CoA)."
::= { radiusDynAuthServerEntry 21 }

radiusDynAuthClientCoAAcks OBJECT-TYPE
SYNTAX Counter32
UNITS "replies"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS CoA-ACK packets received from
this Dynamic Authorization Server. This counter may
experience a discontinuity when the DAC module
(re)starts, as indicated by the value of
radiusDynAuthClientCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.2, Change-of-Authorization
Messages (CoA)."
::= { radiusDynAuthServerEntry 22 }

radiusDynAuthClientCoANaks OBJECT-TYPE
SYNTAX Counter32
UNITS "replies"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS CoA-NAK packets received from
this Dynamic Authorization Server. This includes the
RADIUS CoA-NAK packets received with a Service-Type
attribute with value 'Authorize Only' and the RADIUS
CoA-NAK packets received because no session context

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was found. This counter may experience a discontinuity
when the DAC module (re)starts, as indicated by the
value of radiusDynAuthClientCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.2, Change-of-Authorization
Messages (CoA)."
::= { radiusDynAuthServerEntry 23 }

radiusDynAuthClientCoANakAuthOnlyRequest 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'
received from this Dynamic Authorization Server. This
counter may experience a discontinuity when the DAC
module (re)starts, as indicated by the value of
radiusDynAuthClientCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.2, Change-of-Authorization
Messages (CoA)."
::= { radiusDynAuthServerEntry 24 }

radiusDynAuthClientCoANakSessNoContext OBJECT-TYPE
SYNTAX Counter32
UNITS "replies"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS CoA-NAK packets received from
this Dynamic Authorization Server because no session
context was found; i.e., it includes an Error-Cause
attribute with value 503 ('Session Context Not Found').
This counter may experience a discontinuity when the
DAC module (re)starts as indicated by the value of
radiusDynAuthClientCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.2, Change-of-Authorization
Messages (CoA)."
::= { radiusDynAuthServerEntry 25 }

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

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RFC 4672 RADIUS Dynamic Authorization Client MIB September 2006

DESCRIPTION
"The number of malformed RADIUS CoA-Ack and CoA-NAK
packets received from this Dynamic Authorization
Server. Bad authenticators and unknown types are
not included as malformed CoA-Ack and CoA-NAK packets.
This counter may experience a discontinuity when the
DAC module (re)starts, as indicated by the value of
radiusDynAuthClientCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.2, Change-of-Authorization
Messages (CoA), and Section 2.3, Packet Format."
::= { radiusDynAuthServerEntry 26 }

radiusDynAuthClientCoABadAuthenticators OBJECT-TYPE
SYNTAX Counter32
UNITS "replies"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS CoA-Ack and CoA-NAK packets
that contained invalid Authenticator field
received from this Dynamic Authorization Server.
This counter may experience a discontinuity when the
DAC module (re)starts, as indicated by the value of
radiusDynAuthClientCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.2, Change-of-Authorization
Messages (CoA), and Section 2.3, Packet Format."
::= { radiusDynAuthServerEntry 27 }

radiusDynAuthClientCoAPendingRequests OBJECT-TYPE
SYNTAX Gauge32
UNITS "requests"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of RADIUS CoA-request packets destined for
this server that have not yet timed out or received a
response. This variable is incremented when an
CoA-Request is sent and decremented due to receipt of
a CoA-Ack, a CoA-NAK, or a timeout, or a
retransmission."
REFERENCE
"RFC 3576, Section 2.2, Change-of-Authorization
Messages (CoA)."
::= { radiusDynAuthServerEntry 28 }

radiusDynAuthClientCoATimeouts OBJECT-TYPE

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SYNTAX Counter32
UNITS "timeouts"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of CoA request timeouts to this server.
After a timeout, the client may retry to the same
server or give up. A retry to the same server is
counted as a retransmit and as a timeout. A send to
a different server is counted as a CoA-Request and
as a timeout. This counter may experience a
discontinuity when the DAC module (re)starts, as
indicated by the value of
radiusDynAuthClientCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.2, Change-of-Authorization
Messages (CoA)."
::= { radiusDynAuthServerEntry 29 }

radiusDynAuthClientCoAPacketsDropped OBJECT-TYPE
SYNTAX Counter32
UNITS "replies"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of incoming CoA-Ack and CoA-NAK from this
Dynamic Authorization Server silently discarded by the
client application for some reason other than
malformed, bad authenticators, or unknown types. This
counter may experience a discontinuity when the DAC
module (re)starts, as indicated by the value of
radiusDynAuthClientCounterDiscontinuity."
REFERENCE
"RFC 3576, Section 2.2, Change-of-Authorization
Messages (CoA), and Section 2.3, Packet Format."
::= { radiusDynAuthServerEntry 30 }

radiusDynAuthClientUnknownTypes OBJECT-TYPE
SYNTAX Counter32
UNITS "replies"
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
DAC module (re)starts, as indicated by the value of
radiusDynAuthClientCounterDiscontinuity."

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RFC 4672 RADIUS Dynamic Authorization Client MIB September 2006

REFERENCE
"RFC 3576, Section 2.3, Packet Format."
::= { radiusDynAuthServerEntry 31 }

radiusDynAuthClientCounterDiscontinuity 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 DAC
module within the managed entity."
::= { radiusDynAuthServerEntry 32 }

-- conformance information

radiusDynAuthClientMIBConformance
OBJECT IDENTIFIER ::= { radiusDynAuthClientMIB 2 }
radiusDynAuthClientMIBCompliances
OBJECT IDENTIFIER ::= { radiusDynAuthClientMIBConformance 1 }
radiusDynAuthClientMIBGroups
OBJECT IDENTIFIER ::= { radiusDynAuthClientMIBConformance 2 }
-- compliance statements

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

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

OBJECT radiusDynAuthServerAddress
SYNTAX InetAddress (SIZE(4|16))
DESCRIPTION
"An implementation is only required to support IPv4 and
globally unique IPv6 addresses."

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RFC 4672 RADIUS Dynamic Authorization Client MIB September 2006

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

GROUP radiusDynAuthClientNoSessGroup
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)."

::= { radiusDynAuthClientMIBCompliances 1 }

-- units of conformance

radiusDynAuthClientMIBGroup OBJECT-GROUP
OBJECTS { radiusDynAuthClientDisconInvalidServerAddresses,
radiusDynAuthClientCoAInvalidServerAddresses,
radiusDynAuthServerAddressType,
radiusDynAuthServerAddress,
radiusDynAuthServerClientPortNumber,
radiusDynAuthServerID,
radiusDynAuthClientRoundTripTime,
radiusDynAuthClientDisconRequests,
radiusDynAuthClientDisconRetransmissions,
radiusDynAuthClientDisconAcks,
radiusDynAuthClientDisconNaks,
radiusDynAuthClientMalformedDisconResponses,
radiusDynAuthClientDisconBadAuthenticators,
radiusDynAuthClientDisconPendingRequests,
radiusDynAuthClientDisconTimeouts,
radiusDynAuthClientDisconPacketsDropped,
radiusDynAuthClientCoARequests,
radiusDynAuthClientCoARetransmissions,
radiusDynAuthClientCoAAcks,
radiusDynAuthClientCoANaks,
radiusDynAuthClientMalformedCoAResponses,
radiusDynAuthClientCoABadAuthenticators,
radiusDynAuthClientCoAPendingRequests,
radiusDynAuthClientCoATimeouts,
radiusDynAuthClientCoAPacketsDropped,
radiusDynAuthClientUnknownTypes,
radiusDynAuthClientCounterDiscontinuity
}
STATUS current

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RFC 4672 RADIUS Dynamic Authorization Client MIB September 2006

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

radiusDynAuthClientAuthOnlyGroup OBJECT-GROUP
OBJECTS { radiusDynAuthClientDisconAuthOnlyRequests,
radiusDynAuthClientDisconNakAuthOnlyRequest,
radiusDynAuthClientCoAAuthOnlyRequest,
radiusDynAuthClientCoANakAuthOnlyRequest
}
STATUS current
DESCRIPTION
"The collection of objects supporting the RADIUS
messages including Service-Type attribute with
value 'Authorize Only'."
::= { radiusDynAuthClientMIBGroups 2 }

radiusDynAuthClientNoSessGroup OBJECT-GROUP
OBJECTS { radiusDynAuthClientDisconNakSessNoContext,
radiusDynAuthClientCoANakSessNoContext
}
STATUS current
DESCRIPTION
"The collection of objects supporting the RADIUS
messages that are referring to non-existing sessions."
::= { radiusDynAuthClientMIBGroups 3 }

END

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:

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RFC 4672 RADIUS Dynamic Authorization Client MIB September 2006

radiusDynAuthServerAddress and radiusDynAuthServerAddressType

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

radiusDynAuthServerID

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

radiusDynAuthServerClientPortNumber

This can be used to determine the destination port number to which
the DAC is sending. This information could be useful in mounting
an attack on 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.

6. IANA Considerations

The IANA has assigned OID number 145 under mib-2.

7. Acknowledgements

The authors would also 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.

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RFC 4672 RADIUS Dynamic Authorization Client MIB September 2006

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.

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.

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

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

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RFC 4672 RADIUS Dynamic Authorization Client MIB September 2006

[RFC4673] De Cnodder, S., Jonnala, N., and M. Chiba, "RADIUS Dynamic
Authorization Server MIB", RFC 4673, 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 4672 RADIUS Dynamic Authorization Client 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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Acknowledgement

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