This is a purely informative rendering of an RFC that includes verified errata. This rendering may not be used as a reference.

The following 'Verified' errata have been incorporated in this document: EID 25, EID 888
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

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].

   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.

              +---------------+                      +---------------+
    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.

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: stefaan.de_cnodder@alcatel.be

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

                Phone: +91 94487 60828
                EMail: njonnala@cisco.com

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

                Phone: +1 408 525 7198
                EMail: mchiba@cisco.com "
       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).

            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 }

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,
       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

              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."

       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

              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 }

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."

       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

              (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

       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

             "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

              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  "centiseconds" 
EID 25 (Verified) is as follows:

Section: 4

Original Text:

hundredths of a second

Corrected Text:

centiseconds
Notes:
Why not use the common ISO-standard unit-multiple name, "centiseconds" (abbreviation: "cs"), instead of the long-winded "hundredths of a second" ?

This applies to the UNITS and the DESCRIPTION clause of
- radiusDynAuthServerCounterDiscontinuity (RFC 4673, page 17),

from pending

--VERIFIER COMMENT--
well, yes, centiseconds can be used as well but both terms are the same.
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)) 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 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 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. 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. 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. Authors' Addresses Stefaan De Cnodder Alcatel Francis Wellesplein 1 B-2018 Antwerp Belgium Phone: +32 3 240 85 15 EMail: stefaan.de_cnodder@alcatel.be Nagi Reddy Jonnala Cisco Systems, Inc. Divyasree Chambers, B Wing, O'Shaugnessy Road Bangalore-560027, India Phone: +91 94487 60828 EMail: njonnala@cisco.com Murtaza Chiba Cisco Systems, Inc. 170 West Tasman Dr. San Jose CA, 95134 Phone: +1 408 525 7198 EMail: mchiba@cisco.com 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. This document and the information contained herein are provided on an "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY AND THE INTERNET ENGINEERING TASK FORCE DISCLAIM 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. Intellectual Property The IETF takes no position regarding the validity or scope of any Intellectual Property Rights or other rights that might be claimed to pertain to the implementation or use of the technology described in this document or the extent to which any license under such rights might or might not be available; nor does it represent that it has made any independent effort to identify any such rights. Information on the procedures with respect to rights in RFC documents can be found in BCP 78 and BCP 79. Copies of IPR disclosures made to the IETF Secretariat and any assurances of licenses to be made available, or the result of an attempt made to obtain a general license or permission for the use of such proprietary rights by implementers or users of this specification can be obtained from the IETF on-line IPR repository at http://www.ietf.org/ipr. The IETF invites any interested party to bring to its attention any copyrights, patents or patent applications, or other proprietary rights that may cover technology that may be required to implement this standard. Please address the information to the IETF at ietf-ipr@ietf.org. Acknowledgement Funding for the RFC Editor function is provided by the IETF Administrative Support Activity (IASA).
EID 888 (Verified) is as follows:

Section: 99

Original Text:

severe MIB module structural problem
-- issue instantiated similarly in both RFC 4672 and 4673

Let's start with RFC 4672 and the RADIUS-DYNAUTH-CLIENT-MIB module.

On page 5 of RFC 4672, two module-global scalar objects are specified;
the DESCRIPTION clause of the
radiusDynAuthClientDisconInvalidServerAddresses OBJECT-TYPE says:

                                           [...].  This counter may
                 experience a discontinuity when the DAC module
                 (re)starts, as indicated by the value of
                 radiusDynAuthClientCounterDiscontinuity."

and the literally same sentence appears again in the DESCRIPTION
clause of the radiusDynAuthClientCoAInvalidServerAddresses OBJECT-TYPE.

This would make sense iff radiusDynAuthClientCounterDiscontinuity
would have been defined as another module-global scalar MIB object.
But unfortunately, radiusDynAuthClientCounterDiscontinuity is a
tabular row object in the radiusDynAuthServerTable, with separate
instances for every radiusDynAuthServerIndex instantiated there.
So, which object instance should be taken for reference ???
Moreover, should ever the radiusDynAuthServerTable be empty,
no such CounterDiscontinuity objects would be instantiated,
invalidating the semantical integrity of the MIB module.

Thus, let's take a closer look at the DESCRIPTION clause of the
radiusDynAuthClientCounterDiscontinuity OBJECT-TYPE, on page 17
of the RFC:

          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."

It remains unclear which scope was intended, i.e. whether "the last
counter discontinuity" was meant to just cover the counters within
the same conceptual row of the table, of it was meant to cover all
the counter objects in the MIB module.
If the former interpretation is to be accepted, the references
to this object from the scalar objects' DESCRIPTIONS quoted above
would be severely ambiguous.
In case of the latter interpretation, the semantics of this object
indeed do not depend in any way on the conceptual row, i.e. the
related radiusDynAuthServerIndex instance; but if an object of
the same semantics appears in every table row instantiated, all
of its instances must have the same value at any point in time.
Hence, the object with that semantics should have been modeled
as a module-global scalar object, and not as a tabular object !!!

IMHO, such a single, module-global scalar object would perhaps be
sufficient for the desired purpose.

In a similar way, the module-global scalar counters in the
RADIUS-DYNAUTH-SERVER-MIB module,
radiusDynAuthServerDisconInvalidClientAddresses and
adiusDynAuthServerCoAInvalidClientAddresses,
as specified on page 6 of RFC 4673, refer to the object,
radiusDynAuthServerCounterDiscontinuity,
which turns out to be a tabular row object in the
radiusDynAuthClientTable, not another scalar object,
thus leading to the same kind of ambiguity.

Taken altogether, the specifications are ambigous and will certainly
lead to interoperability problems.

I strongly propose to revise these MIB module specifications as
soon as possible.

Corrected Text:

None
Notes:
from pending

--VERIFIER COMMENT--
seems to be correct. The scalars do not have a discontinuity object.
That sentence should be removed or either an object has to be added. It
seems that the other mibs like RFC4668 also does not have such an object
for the scalars while it has a discontinuity timer for the objects in
the table... It should be for all or for none I would think.