RFC4669

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Network Working Group D. Nelson Request for Comments: 4669 Enterasys Networks Obsoletes: 2619 August 2006 Category: Standards Track

           RADIUS Authentication Server MIB for IPv6

Status of This Memo

This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (2006).

Abstract

This memo defines a set of extensions that instrument RADIUS authentication server functions. These extensions represent a portion of the Management Information Base (MIB) for use with network management protocols in the Internet community. Using these extensions, IP-based management stations can manage RADIUS authentication servers.

This memo obsoletes RFC 2619 by deprecating the MIB table containing IPv4-only address formats and defining a new table to add support for version-neutral IP address formats. The remaining MIB objects from RFC 2619 are carried forward into this document. This memo also adds UNITS and REFERENCE clauses to selected objects.

Introduction

This memo defines a portion of the Management Information Base (MIB) for use with network management protocols in the Internet community. The objects defined within this memo relate to the Remote Authentication Dial-In User Service (RADIUS) Authentication Server as defined in RFC 2865 RFC2865.

Terminology

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119 RFC2119.

This document uses terminology from RFC 2865 RFC2865.

This document uses the word "malformed" with respect to RADIUS packets, particularly in the context of counters of "malformed packets". While RFC 2865 does not provide an explicit definition of "malformed", malformed generally means that the implementation has determined the packet does not match the format defined in RFC 2865. Some implementations may determine that packets are malformed when the Vendor Specific Attribute (VSA) format does not follow the RFC 2865 recommendations for VSAs. Those implementations are used in deployments today, and thus set the de facto definition of "malformed".

The Internet-Standard Management Framework

For a detailed overview of the documents that describe the current Internet-Standard Management Framework, please refer to section 7 of RFC 3410 RFC3410.

Managed objects are accessed via a virtual information store, termed the Management Information Base or MIB. MIB objects are generally accessed through the Simple Network Management Protocol (SNMP). Objects in the MIB are defined using the mechanisms defined in the Structure of Management Information (SMI). This memo specifies a MIB module that is compliant to the SMIv2, which is described in STD 58, RFC 2578 RFC2578, STD 58, RFC 2579 RFC2579 and STD 58, RFC 2580 RFC2580.

Scope of Changes

This document obsoletes RFC 2619 RFC2619, RADIUS Authentication Server MIB, by deprecating the radiusAuthClientTable table and adding a new table, radiusAuthClientExtTable, containing radiusAuthClientInetAddressType and radiusAuthClientInetAddress. The

purpose of these added MIB objects is to support version-neutral IP addressing formats. The existing table containing radiusAuthClientAddress is deprecated. The remaining MIB objects from RFC 2619 are carried forward into this document. This memo also adds UNITS and REFERENCE clauses to selected objects.

RFC 4001 RFC4001, which defines the SMI Textual Conventions for version-neutral IP addresses, contains the following recommendation.

'In particular, when revising a MIB module that contains IPv4 specific tables, it is suggested to define new tables using the textual conventions defined in this memo RFC4001 that support all versions of IP. The status of the new tables SHOULD be "current", whereas the status of the old IP version specific tables SHOULD be changed to "deprecated". The other approach, of having multiple similar tables for different IP versions, is strongly discouraged.'

Structure of the MIB Module

The RADIUS authentication protocol, described in RFC 2865 RFC2865, distinguishes between the client function and the server function. In RADIUS authentication, clients send Access-Requests, and servers reply with Access-Accepts, Access-Rejects, and Access-Challenges. Typically, NAS devices implement the client function, and thus would be expected to implement the RADIUS authentication client MIB, while RADIUS authentication servers implement the server function, and thus would be expected to implement the RADIUS authentication server MIB.

However, it is possible for a RADIUS authentication entity to perform both client and server functions. For example, a RADIUS proxy may act as a server to one or more RADIUS authentication clients, while simultaneously acting as an authentication client to one or more authentication servers. In such situations, it is expected that RADIUS entities combining client and server functionality will support both the client and server MIBs. The server MIB is defined in this document, and the client MIB is defined in RFC4668.

This MIB module contains fourteen scalars as well as a single table, the RADIUS Authentication Client Table, which contains one row for each RADIUS authentication client with which the server shares a secret. Each entry in the RADIUS Authentication Client Table includes thirteen columns presenting a view of the activity of the RADIUS authentication server.

This MIB imports from RFC2578, RFC2580, RFC3411, and RFC4001.

Deprecated Objects

The deprecated table in this MIB is carried forward from RFC 2619 RFC2619. There are two conditions under which it MAY be desirable for managed entities to continue to support the deprecated table:

1. The managed entity only supports IPv4 address formats.

2. The managed entity supports both IPv4 and IPv6 address formats,

   and the deprecated table is supported for backwards compatibility
   with older management stations.  This option SHOULD only be used
   when the IP addresses in the new table are in IPv4 format and can
   accurately be represented in both the new table and the
   deprecated table.

Managed entities SHOULD NOT instantiate row entries in the deprecated table, containing IPv4-only address objects, when the RADIUS client address represented in such a table row is not an IPv4 address. Managed entities SHOULD NOT return inaccurate values of IP address or SNMP object access errors for IPv4-only address objects in otherwise populated tables. When row entries exist in both the deprecated IPv4-only table and the new IP-version-neutral table that describe the same RADIUS client, the row indexes SHOULD be the same for the corresponding rows in each table, to facilitate correlation of these related rows by management applications.

Definitions

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

IMPORTS

      MODULE-IDENTITY, OBJECT-TYPE, OBJECT-IDENTITY,
      Counter32, Integer32,
      IpAddress, TimeTicks, mib-2      FROM SNMPv2-SMI
      SnmpAdminString                  FROM SNMP-FRAMEWORK-MIB
      InetAddressType, InetAddress     FROM INET-ADDRESS-MIB
      MODULE-COMPLIANCE, OBJECT-GROUP  FROM SNMPv2-CONF;

radiusAuthServMIB MODULE-IDENTITY

      LAST-UPDATED "200608210000Z"  -- 21 August 2006
      ORGANIZATION "IETF RADIUS Extensions Working Group."
      CONTACT-INFO
             " Bernard Aboba
               Microsoft
               One Microsoft Way
               Redmond, WA  98052
               US
               Phone: +1 425 936 6605
               EMail: [email protected]"
      DESCRIPTION
            "The MIB module for entities implementing the server
             side of the Remote Authentication Dial-In User
             Service (RADIUS) authentication protocol.  Copyright
             (C) The Internet Society (2006).  This version of this
             MIB module is part of RFC 4669; see the RFC itself for
             full legal notices."
      REVISION "200608210000Z"  -- 21 August 2006
      DESCRIPTION
            "Revised version as published in RFC 4669.  This
             version obsoletes that of RFC 2619 by deprecating the
             MIB table containing IPv4-only address formats and
             defining a new table to add support for version-neutral
             IP address formats.  The remaining MIB objects from RFC
             2619 are carried forward into this version."
      REVISION "199906110000Z"  -- 11 Jun 1999
      DESCRIPTION "Initial version as published in RFC 2619."
      ::= { radiusAuthentication 1 }

radiusMIB OBJECT-IDENTITY

      STATUS  current
      DESCRIPTION
            "The OID assigned to RADIUS MIB work by the IANA."
       ::= { mib-2 67 }

radiusAuthentication OBJECT IDENTIFIER ::= {radiusMIB 1}

radiusAuthServMIBObjects OBJECT IDENTIFIER

       ::= { radiusAuthServMIB 1 }

radiusAuthServ OBJECT IDENTIFIER

       ::= { radiusAuthServMIBObjects 1 }

radiusAuthServIdent OBJECT-TYPE

      SYNTAX      SnmpAdminString
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
            "The implementation identification string for the
             RADIUS authentication server software in use on the
             system, for example, 'FNS-2.1'."
      ::= {radiusAuthServ 1}

radiusAuthServUpTime OBJECT-TYPE

      SYNTAX      TimeTicks
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
            "If the server has a persistent state (e.g., a
             process), this value will be the time elapsed (in
             hundredths of a second) since the server process
             was started.  For software without persistent state,
             this value will be zero."
      ::= {radiusAuthServ 2}

radiusAuthServResetTime OBJECT-TYPE

      SYNTAX      TimeTicks
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
            "If the server has a persistent state (e.g., a process)
             and supports a 'reset' operation (e.g., can be told to
             re-read configuration files), this value will be the
             time elapsed (in hundredths of a second) since the
             server was 'reset.'  For software that does not
             have persistence or does not support a 'reset'
             operation, this value will be zero."
      ::= {radiusAuthServ 3}

radiusAuthServConfigReset OBJECT-TYPE

      SYNTAX INTEGER { other(1),
                       reset(2),
                       initializing(3),
                       running(4)}
      MAX-ACCESS  read-write
      STATUS      current
      DESCRIPTION
             "Status/action object to reinitialize any persistent
              server state.  When set to reset(2), any persistent
              server state (such as a process) is reinitialized as
              if the server had just been started.  This value will
              never be returned by a read operation.  When read,
              one of the following values will be returned:
                  other(1) - server in some unknown state;
                  initializing(3) - server (re)initializing;
                  running(4) - server currently running."
      ::= {radiusAuthServ 4}

radiusAuthServTotalAccessRequests OBJECT-TYPE

       SYNTAX Counter32
       UNITS "packets"
       MAX-ACCESS read-only
       STATUS current
       DESCRIPTION
              "The number of packets received on the
               authentication port."
       REFERENCE "RFC 2865 section 4.1"
       ::= { radiusAuthServ 5}

radiusAuthServTotalInvalidRequests OBJECT-TYPE

       SYNTAX Counter32
       UNITS "packets"
       MAX-ACCESS read-only
       STATUS current
       DESCRIPTION
             "The number of RADIUS Access-Request packets
              received from unknown addresses."
       REFERENCE "RFC 2865 section 4.1"
       ::= { radiusAuthServ 6 }

radiusAuthServTotalDupAccessRequests OBJECT-TYPE

      SYNTAX Counter32
      UNITS "packets"
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
            "The number of duplicate RADIUS Access-Request
             packets received."
      REFERENCE "RFC 2865 section 4.1"
      ::= { radiusAuthServ 7 }

radiusAuthServTotalAccessAccepts OBJECT-TYPE

      SYNTAX Counter32
      UNITS "packets"
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
            "The number of RADIUS Access-Accept packets sent."
      REFERENCE "RFC 2865 section 4.2"
      ::= { radiusAuthServ 8 }

radiusAuthServTotalAccessRejects OBJECT-TYPE

     SYNTAX Counter32
     UNITS "packets"
     MAX-ACCESS read-only
     STATUS current
     DESCRIPTION
           "The number of RADIUS Access-Reject packets sent."
     REFERENCE "RFC 2865 section 4.3"
     ::= { radiusAuthServ 9 }

radiusAuthServTotalAccessChallenges OBJECT-TYPE

     SYNTAX Counter32
     UNITS "packets"
     MAX-ACCESS read-only
     STATUS current
     DESCRIPTION
           "The number of RADIUS Access-Challenge packets sent."
     REFERENCE "RFC 2865 section 4.4"
     ::= { radiusAuthServ 10 }

radiusAuthServTotalMalformedAccessRequests OBJECT-TYPE

     SYNTAX Counter32
     UNITS "packets"
     MAX-ACCESS read-only
     STATUS current
     DESCRIPTION
           "The number of malformed RADIUS Access-Request
            packets received.  Bad authenticators
            and unknown types are not included as
            malformed Access-Requests."
     REFERENCE "RFC 2865 section 4.1"
     ::= { radiusAuthServ 11 }

radiusAuthServTotalBadAuthenticators OBJECT-TYPE

     SYNTAX Counter32
     UNITS "packets"
     MAX-ACCESS read-only
     STATUS current
     DESCRIPTION
           "The number of RADIUS Authentication-Request packets
            that contained invalid Message Authenticator
            attributes received."
     REFERENCE "RFC 2865 section 3"
     ::= { radiusAuthServ 12 }

radiusAuthServTotalPacketsDropped OBJECT-TYPE

     SYNTAX Counter32
     UNITS "packets"
     MAX-ACCESS read-only
     STATUS current
     DESCRIPTION
           "The number of incoming packets
            silently discarded for some reason other
            than malformed, bad authenticators or
            unknown types."
     REFERENCE "RFC 2865 section 3"
     ::= { radiusAuthServ 13 }

radiusAuthServTotalUnknownTypes OBJECT-TYPE

     SYNTAX Counter32
     UNITS "packets"
     MAX-ACCESS read-only
     STATUS current
     DESCRIPTION
           "The number of RADIUS packets of unknown type that
            were received."
     REFERENCE "RFC 2865 section 4"
     ::= { radiusAuthServ 14 }

radiusAuthClientTable OBJECT-TYPE

      SYNTAX     SEQUENCE OF RadiusAuthClientEntry
      MAX-ACCESS not-accessible
      STATUS     deprecated
      DESCRIPTION
            "The (conceptual) table listing the RADIUS
             authentication clients with which the server shares
             a secret."
      ::= { radiusAuthServ 15 }

radiusAuthClientEntry OBJECT-TYPE

      SYNTAX     RadiusAuthClientEntry
      MAX-ACCESS not-accessible
      STATUS     deprecated
      DESCRIPTION
            "An entry (conceptual row) representing a RADIUS
             authentication client with which the server shares a
             secret."
      INDEX      { radiusAuthClientIndex }
      ::= { radiusAuthClientTable 1 }

RadiusAuthClientEntry ::= SEQUENCE {

      radiusAuthClientIndex                           Integer32,
      radiusAuthClientAddress                         IpAddress,
      radiusAuthClientID                        SnmpAdminString,
      radiusAuthServAccessRequests                    Counter32,
      radiusAuthServDupAccessRequests                 Counter32,
      radiusAuthServAccessAccepts                     Counter32,
      radiusAuthServAccessRejects                     Counter32,
      radiusAuthServAccessChallenges                  Counter32,
      radiusAuthServMalformedAccessRequests           Counter32,
      radiusAuthServBadAuthenticators                 Counter32,
      radiusAuthServPacketsDropped                    Counter32,
      radiusAuthServUnknownTypes                      Counter32

}

radiusAuthClientIndex OBJECT-TYPE

      SYNTAX     Integer32 (1..2147483647)
      MAX-ACCESS not-accessible
      STATUS     deprecated
      DESCRIPTION
            "A number uniquely identifying each RADIUS
             authentication client with which this server
             communicates."
      ::= { radiusAuthClientEntry 1 }

radiusAuthClientAddress OBJECT-TYPE

      SYNTAX     IpAddress
      MAX-ACCESS read-only
      STATUS     deprecated
      DESCRIPTION
            "The NAS-IP-Address of the RADIUS authentication client
             referred to in this table entry."
      REFERENCE "RFC 2865 section 2"
      ::= { radiusAuthClientEntry 2 }

radiusAuthClientID OBJECT-TYPE

      SYNTAX     SnmpAdminString
      MAX-ACCESS read-only
      STATUS     deprecated
      DESCRIPTION
            "The NAS-Identifier of the RADIUS authentication client
             referred to in this table entry.  This is not
             necessarily the same as sysName in MIB II."
      REFERENCE "RFC 2865 section 5.32"
      ::= { radiusAuthClientEntry 3 }

-- Server Counters

-- -- Responses = AccessAccepts + AccessRejects + AccessChallenges -- -- Requests - DupRequests - BadAuthenticators - MalformedRequests - -- UnknownTypes - PacketsDropped - Responses = Pending -- -- Requests - DupRequests - BadAuthenticators - MalformedRequests - -- UnknownTypes - PacketsDropped = entries logged

radiusAuthServAccessRequests OBJECT-TYPE

      SYNTAX Counter32
      UNITS "packets"
      MAX-ACCESS read-only
      STATUS deprecated
      DESCRIPTION
            "The number of packets received on the authentication
             port from this client."
      REFERENCE "RFC 2865 section 4.1"
      ::= { radiusAuthClientEntry  4 }

radiusAuthServDupAccessRequests OBJECT-TYPE

      SYNTAX Counter32
      UNITS "packets"
      MAX-ACCESS read-only
      STATUS deprecated
      DESCRIPTION
            "The number of duplicate RADIUS Access-Request
             packets received from this client."
      REFERENCE "RFC 2865 section 4.1"
      ::= { radiusAuthClientEntry  5 }

radiusAuthServAccessAccepts OBJECT-TYPE

      SYNTAX Counter32
      UNITS "packets"
      MAX-ACCESS read-only
      STATUS deprecated
      DESCRIPTION
            "The number of RADIUS Access-Accept packets
             sent to this client."
      REFERENCE "RFC 2865 section 4.2"
      ::= { radiusAuthClientEntry  6 }

radiusAuthServAccessRejects OBJECT-TYPE

     SYNTAX Counter32
     UNITS "packets"
     MAX-ACCESS read-only
     STATUS deprecated
     DESCRIPTION
            "The number of RADIUS Access-Reject packets
             sent to this client."
      REFERENCE "RFC 2865 section 4.3"
      ::= { radiusAuthClientEntry  7 }

radiusAuthServAccessChallenges OBJECT-TYPE

      SYNTAX Counter32
      UNITS "packets"
      MAX-ACCESS read-only
      STATUS deprecated
      DESCRIPTION
            "The number of RADIUS Access-Challenge packets
             sent to this client."
      REFERENCE "RFC 2865 section 4.4"
      ::= { radiusAuthClientEntry  8 }

radiusAuthServMalformedAccessRequests OBJECT-TYPE

      SYNTAX Counter32
      UNITS "packets"
      MAX-ACCESS read-only
      STATUS deprecated
      DESCRIPTION
            "The number of malformed RADIUS Access-Request
             packets received from this client.
             Bad authenticators and unknown types are not included
             as malformed Access-Requests."
      REFERENCE "RFC 2865 section 3"
      ::= { radiusAuthClientEntry  9 }

radiusAuthServBadAuthenticators OBJECT-TYPE

      SYNTAX Counter32
      UNITS "packets"
      MAX-ACCESS read-only
      STATUS deprecated
      DESCRIPTION
            "The number of RADIUS Authentication-Request packets
             that contained invalid Message Authenticator
             attributes received from this client."
      REFERENCE "RFC 2865 section 3"
      ::= { radiusAuthClientEntry  10 }

radiusAuthServPacketsDropped OBJECT-TYPE

     SYNTAX Counter32
     UNITS "packets"
     MAX-ACCESS read-only
     STATUS deprecated
     DESCRIPTION
             "The number of incoming packets from this
              client silently discarded for some reason other
              than malformed, bad authenticators or
              unknown types."
      REFERENCE "RFC 2865 section 3"
      ::= { radiusAuthClientEntry  11 }

radiusAuthServUnknownTypes OBJECT-TYPE

      SYNTAX Counter32
      UNITS "packets"
      MAX-ACCESS read-only
      STATUS deprecated
      DESCRIPTION
            "The number of RADIUS packets of unknown type that
             were received from this client."
      REFERENCE "RFC 2865 section 4"
      ::= { radiusAuthClientEntry  12 }

-- New MIB objects added in this revision

radiusAuthClientExtTable OBJECT-TYPE

      SYNTAX     SEQUENCE OF RadiusAuthClientExtEntry
      MAX-ACCESS not-accessible
      STATUS     current
      DESCRIPTION
            "The (conceptual) table listing the RADIUS
             authentication clients with which the server shares
             a secret."
      ::= { radiusAuthServ 16 }

radiusAuthClientExtEntry OBJECT-TYPE

      SYNTAX     RadiusAuthClientExtEntry
      MAX-ACCESS not-accessible
      STATUS     current
      DESCRIPTION
            "An entry (conceptual row) representing a RADIUS
             authentication client with which the server shares a
             secret."
      INDEX      { radiusAuthClientExtIndex }
      ::= { radiusAuthClientExtTable 1 }

RadiusAuthClientExtEntry ::= SEQUENCE {

      radiusAuthClientExtIndex                 Integer32,
      radiusAuthClientInetAddressType          InetAddressType,
      radiusAuthClientInetAddress              InetAddress,
      radiusAuthClientExtID                    SnmpAdminString,
      radiusAuthServExtAccessRequests          Counter32,
      radiusAuthServExtDupAccessRequests       Counter32,
      radiusAuthServExtAccessAccepts           Counter32,
      radiusAuthServExtAccessRejects           Counter32,
      radiusAuthServExtAccessChallenges        Counter32,
      radiusAuthServExtMalformedAccessRequests Counter32,
      radiusAuthServExtBadAuthenticators       Counter32,
      radiusAuthServExtPacketsDropped          Counter32,
      radiusAuthServExtUnknownTypes            Counter32,
      radiusAuthServCounterDiscontinuity       TimeTicks

}

radiusAuthClientExtIndex OBJECT-TYPE

      SYNTAX     Integer32 (1..2147483647)
      MAX-ACCESS not-accessible
      STATUS     current
      DESCRIPTION
            "A number uniquely identifying each RADIUS
             authentication client with which this server
             communicates."
      ::= { radiusAuthClientExtEntry 1 }

radiusAuthClientInetAddressType OBJECT-TYPE

        SYNTAX     InetAddressType
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
              "The type of address format used for the
               radiusAuthClientInetAddress object."
        ::= { radiusAuthClientExtEntry 2 }
  radiusAuthClientInetAddress OBJECT-TYPE
        SYNTAX     InetAddress
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
              "The IP address of the RADIUS authentication
               client referred to in this table entry, using
               the version-neutral IP address format."
        ::= { radiusAuthClientExtEntry 3 }

radiusAuthClientExtID OBJECT-TYPE

      SYNTAX     SnmpAdminString
      MAX-ACCESS read-only
      STATUS     current
      DESCRIPTION
            "The NAS-Identifier of the RADIUS authentication client
             referred to in this table entry.  This is not
             necessarily the same as sysName in MIB II."
      REFERENCE "RFC 2865 section 5.32"
      ::= { radiusAuthClientExtEntry 4 }

-- Server Counters

-- -- Responses = AccessAccepts + AccessRejects + AccessChallenges -- -- Requests - DupRequests - BadAuthenticators - MalformedRequests - -- UnknownTypes - PacketsDropped - Responses = Pending -- -- Requests - DupRequests - BadAuthenticators - MalformedRequests - -- UnknownTypes - PacketsDropped = entries logged

radiusAuthServExtAccessRequests OBJECT-TYPE

      SYNTAX Counter32
      UNITS "packets"
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
            "The number of packets received on the authentication
             port from this client.  This counter may experience a
             discontinuity when the RADIUS Server module within the
             managed entity is reinitialized, as indicated by the
             current value of radiusAuthServCounterDiscontinuity."
      REFERENCE "RFC 2865 section 4.1"
      ::= { radiusAuthClientExtEntry  5 }

radiusAuthServExtDupAccessRequests OBJECT-TYPE

      SYNTAX Counter32
      UNITS "packets"
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
            "The number of duplicate RADIUS Access-Request
             packets received from this client.  This counter may
             experience a discontinuity when the RADIUS Server
             module within the managed entity is reinitialized, as
             indicated by the current value of
             radiusAuthServCounterDiscontinuity."
      REFERENCE "RFC 2865 section 4.1"
      ::= { radiusAuthClientExtEntry  6 }

radiusAuthServExtAccessAccepts OBJECT-TYPE

      SYNTAX Counter32
      UNITS "packets"
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
            "The number of RADIUS Access-Accept packets
             sent to this client.  This counter may experience a
             discontinuity when the RADIUS Server module within the
             managed entity is reinitialized, as indicated by the
             current value of radiusAuthServCounterDiscontinuity."
      REFERENCE "RFC 2865 section 4.2"
      ::= { radiusAuthClientExtEntry  7 }

radiusAuthServExtAccessRejects OBJECT-TYPE

     SYNTAX Counter32
     UNITS "packets"
     MAX-ACCESS read-only
     STATUS current
     DESCRIPTION
            "The number of RADIUS Access-Reject packets
             sent to this client.  This counter may experience a
             discontinuity when the RADIUS Server module within the
             managed entity is reinitialized, as indicated by the
             current value of radiusAuthServCounterDiscontinuity."
      REFERENCE "RFC 2865 section 4.3"
      ::= { radiusAuthClientExtEntry  8 }

radiusAuthServExtAccessChallenges OBJECT-TYPE

      SYNTAX Counter32
      UNITS "packets"
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
            "The number of RADIUS Access-Challenge packets
             sent to this client.  This counter may experience a
             discontinuity when the RADIUS Server module within the
             managed entity is reinitialized, as indicated by the
             current value of radiusAuthServCounterDiscontinuity."
      REFERENCE "RFC 2865 section 4.4"
      ::= { radiusAuthClientExtEntry  9 }

radiusAuthServExtMalformedAccessRequests OBJECT-TYPE

      SYNTAX Counter32
      UNITS "packets"
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
            "The number of malformed RADIUS Access-Request
             packets received from this client.  Bad authenticators
             and unknown types are not included as malformed
             Access-Requests.  This counter may experience a
             discontinuity when the RADIUS Server module within the
             managed entity is reinitialized, as indicated by the
             current value of radiusAuthServCounterDiscontinuity."
      REFERENCE "RFC 2865 sections 3, 4.1"
      ::= { radiusAuthClientExtEntry  10 }

radiusAuthServExtBadAuthenticators OBJECT-TYPE

      SYNTAX Counter32
      UNITS "packets"
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
            "The number of RADIUS Authentication-Request packets
             that contained invalid Message Authenticator
             attributes received from this client.  This counter
             may experience a discontinuity when the RADIUS Server
             module within the managed entity is reinitialized, as
             indicated by the current value of
             radiusAuthServCounterDiscontinuity."
      REFERENCE "RFC 2865 section 3"
      ::= { radiusAuthClientExtEntry  11 }

radiusAuthServExtPacketsDropped OBJECT-TYPE

     SYNTAX Counter32
     UNITS "packets"
     MAX-ACCESS read-only
     STATUS current
     DESCRIPTION
            "The number of incoming packets from this client
             silently discarded for some reason other than
             malformed, bad authenticators or unknown types.
             This counter may experience a discontinuity when the
             RADIUS Server module within the managed entity is
             reinitialized, as indicated by the current value of
             radiusAuthServCounterDiscontinuity."
      REFERENCE "RFC 2865 section 3"
      ::= { radiusAuthClientExtEntry  12 }

radiusAuthServExtUnknownTypes OBJECT-TYPE

      SYNTAX Counter32
      UNITS "packets"
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
            "The number of RADIUS packets of unknown type that
             were received from this client.  This counter may
             experience a discontinuity when the RADIUS Server
             module within the managed entity is reinitialized, as
             indicated by the current value of
             radiusAuthServCounterDiscontinuity."
      REFERENCE "RFC 2865 section 4"
      ::= { radiusAuthClientExtEntry  13 }

radiusAuthServCounterDiscontinuity OBJECT-TYPE

        SYNTAX TimeTicks
        UNITS "centiseconds"
        MAX-ACCESS read-only
        STATUS current
        DESCRIPTION
              "The number of centiseconds since the last
               discontinuity in the RADIUS Server counters.
               A discontinuity may be the result of a
               reinitialization of the RADIUS Server module
               within the managed entity."
        ::= { radiusAuthClientExtEntry 14 }

-- conformance information

radiusAuthServMIBConformance OBJECT IDENTIFIER

      ::= { radiusAuthServMIB 2 }

radiusAuthServMIBCompliances OBJECT IDENTIFIER

      ::= { radiusAuthServMIBConformance 1 }

radiusAuthServMIBGroups OBJECT IDENTIFIER

      ::= { radiusAuthServMIBConformance 2 }

-- compliance statements

radiusAuthServMIBCompliance MODULE-COMPLIANCE

           STATUS  deprecated
           DESCRIPTION
                 "The compliance statement for authentication
                  servers implementing the RADIUS Authentication
                  Server MIB.  Implementation of this module is for
                  IPv4-only entities, or for backwards compatibility
                  use with entities that support both IPv4 and
                  IPv6."
           MODULE  -- this module
           MANDATORY-GROUPS { radiusAuthServMIBGroup }
           OBJECT        radiusAuthServConfigReset
           WRITE-SYNTAX  INTEGER { reset(2) }
           DESCRIPTION  "The only SETable value is 'reset' (2)."
           ::= { radiusAuthServMIBCompliances 1 }

radiusAuthServMIBExtCompliance MODULE-COMPLIANCE

           STATUS  current
           DESCRIPTION
                 "The compliance statement for authentication
                  servers implementing the RADIUS Authentication
                  Server IPv6 Extensions MIB.  Implementation of
                  this module is for entities that support IPv6,
                  or support IPv4 and IPv6."
           MODULE  -- this module
           MANDATORY-GROUPS { radiusAuthServExtMIBGroup }
           OBJECT        radiusAuthServConfigReset
           WRITE-SYNTAX  INTEGER { reset(2) }
           DESCRIPTION  "The only SETable value is 'reset' (2)."
           OBJECT radiusAuthClientInetAddressType
           SYNTAX InetAddressType { ipv4(1), ipv6(2) }
           DESCRIPTION
             "An implementation is only required to support
              IPv4 and globally unique IPv6 addresses."
           OBJECT radiusAuthClientInetAddress
           SYNTAX InetAddress ( SIZE (4|16) )
           DESCRIPTION
             "An implementation is only required to support
              IPv4 and globally unique IPv6 addresses."
           ::= { radiusAuthServMIBCompliances 2 }

-- units of conformance

radiusAuthServMIBGroup OBJECT-GROUP

     OBJECTS {radiusAuthServIdent,
              radiusAuthServUpTime,
              radiusAuthServResetTime,
              radiusAuthServConfigReset,
              radiusAuthServTotalAccessRequests,
              radiusAuthServTotalInvalidRequests,
              radiusAuthServTotalDupAccessRequests,
              radiusAuthServTotalAccessAccepts,
              radiusAuthServTotalAccessRejects,
              radiusAuthServTotalAccessChallenges,
              radiusAuthServTotalMalformedAccessRequests,
              radiusAuthServTotalBadAuthenticators,
              radiusAuthServTotalPacketsDropped,
              radiusAuthServTotalUnknownTypes,
              radiusAuthClientAddress,
              radiusAuthClientID,
              radiusAuthServAccessRequests,
              radiusAuthServDupAccessRequests,
              radiusAuthServAccessAccepts,
              radiusAuthServAccessRejects,
              radiusAuthServAccessChallenges,
              radiusAuthServMalformedAccessRequests,
              radiusAuthServBadAuthenticators,
              radiusAuthServPacketsDropped,
              radiusAuthServUnknownTypes
             }
     STATUS  deprecated
     DESCRIPTION
           "The collection of objects providing management of
            a RADIUS Authentication Server."
     ::= { radiusAuthServMIBGroups 1 }

radiusAuthServExtMIBGroup OBJECT-GROUP

     OBJECTS {radiusAuthServIdent,
              radiusAuthServUpTime,
              radiusAuthServResetTime,
              radiusAuthServConfigReset,
              radiusAuthServTotalAccessRequests,
              radiusAuthServTotalInvalidRequests,
              radiusAuthServTotalDupAccessRequests,
              radiusAuthServTotalAccessAccepts,
              radiusAuthServTotalAccessRejects,
              radiusAuthServTotalAccessChallenges,
              radiusAuthServTotalMalformedAccessRequests,
              radiusAuthServTotalBadAuthenticators,
              radiusAuthServTotalPacketsDropped,
              radiusAuthServTotalUnknownTypes,
              radiusAuthClientInetAddressType,
              radiusAuthClientInetAddress,
              radiusAuthClientExtID,
              radiusAuthServExtAccessRequests,
              radiusAuthServExtDupAccessRequests,
              radiusAuthServExtAccessAccepts,
              radiusAuthServExtAccessRejects,
              radiusAuthServExtAccessChallenges,
              radiusAuthServExtMalformedAccessRequests,
              radiusAuthServExtBadAuthenticators,
              radiusAuthServExtPacketsDropped,
              radiusAuthServExtUnknownTypes,
              radiusAuthServCounterDiscontinuity
             }
     STATUS  current
     DESCRIPTION
           "The collection of objects providing management of
            a RADIUS Authentication Server."
     ::= { radiusAuthServMIBGroups 2 }

END

Security Considerations

There are a number of management objects defined in this MIB that have a MAX-ACCESS clause of read-write and/or read-create. Such objects may be considered sensitive or vulnerable in some network environments. The support for SET operations in a non-secure environment without proper protection can have a negative effect on network operations. These are:

radiusAuthServConfigReset

  This object can be used to reinitialize the persistent state of
  any server.  When set to reset(2), any persistent server state
  (such as a process) is reinitialized as if the server had just
  been started.  Depending on the server implementation details,
  this action may or may not interrupt the processing of pending
  request in the server.  Abuse of this object may lead to a Denial
  of Service attack on the server.

There are a number of managed objects in this MIB that may contain sensitive information. These are:

radiusAuthClientIPAddress

  This can be used to determine the address of the RADIUS
  authentication client with which the server is communicating.
  This information could be useful in mounting an attack on the
  authentication client.

radiusAuthClientInetAddress

  This can be used to determine the address of the RADIUS
  authentication client with which the server is communicating.
  This information could be useful in mounting an attack on the
  authentication client.

It is thus important to control even GET access to these objects and possibly to even encrypt the values of these object when sending them over the network via SNMP. Not all versions of SNMP provide features for such a secure environment.

SNMP versions prior to SNMPv3 do not provide a secure environment. Even if the network itself is secure (for example by using IPsec), there is no control as to who on the secure network is allowed to access and GET/SET (read/change/create/delete) the objects in this MIB.

It is RECOMMENDED that 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.

References

Normative References

RFC2119 Bradner, S., "Key words for use in RFCs to Indicate

          Requirement Levels", BCP 14, RFC 2119, March 1997.

RFC2578 McCloghrie, K., Ed., Perkins, D., Ed., and J.

          Schoenwaelder, Ed., "Structure of Management Information
          Version 2 (SMIv2)", STD 58, RFC 2578, April 1999.

RFC2579 McCloghrie, K., Ed., Perkins, D., Ed., and J.

          Schoenwaelder, Ed., "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.

RFC2865 Rigney, C., Willens, S., Rubens, A., and W. Simpson,

          "Remote Authentication Dial In User Service (RADIUS)",
          RFC 2865, June 2000.

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.

RFC4001 Daniele, M., Haberman, B., Routhier, S., and J.

          Schoenwaelder, "Textual Conventions for Internet Network
          Addresses", RFC 4001, February 2005.

Informative References

RFC2619 Zorn, G. and B. Aboba, "RADIUS Authentication Server MIB",

          RFC 2619, June 1999.

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.

Appendix A. Acknowledgements

The authors of the original MIB are Bernard Aboba and Glen Zorn.

Many thanks to all reviewers, especially to David Harrington, Dan Romascanu, C.M. Heard, Bruno Pape, Greg Weber, and Bert Wijnen.

Author's Address

David B. Nelson Enterasys Networks 50 Minuteman Road Andover, MA 01810 USA

EMail: [email protected]

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