ftp.cc.uoc.gr
rfc4668
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 29
Network Working Group                                          D. Nelson
Request for Comments: 4668                            Enterasys Networks
Obsoletes: 2618                                              August 2006
Category: Standards Track


               RADIUS Authentication Client MIB for IPv6

Status of This Memo

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

Copyright Notice

   Copyright (C) The Internet Society (2006).

Abstract

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

   This memo obsoletes RFC 2618 by deprecating the MIB table containing
   IPv4-only address formats and defining a new table to add support for
   version-neutral IP address formats.  The remaining MIB objects from
   RFC 2618 are carried forward into this document.  The memo also adds
   UNITS and REFERENCE clauses to selected objects.

Table of Contents

   1. Introduction ....................................................3
   2. Terminology .....................................................3
   3. The Internet-Standard Management Framework ......................3
   4. Scope of Changes ................................................3
   5. Structure of the MIB Module .....................................4
   6. Deprecated Objects ..............................................5
   7. Definitions .....................................................5
   8. Security Considerations ........................................20
   9. References .....................................................22
      9.1. Normative References ......................................22
      9.2. Informative References ....................................22
   Appendix A. Acknowledgements ......................................23

1.  Introduction

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

2.  Terminology

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

   This document uses terminology from RFC 2865 [RFC2865].

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

3.  The Internet-Standard Management Framework

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

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

4.  Scope of Changes

   This document obsoletes RFC 2618 [RFC2618], RADIUS Authentication
   Client MIB, by deprecating the radiusAuthServerTable table and adding
   a new table, radiusAuthServerExtTable, containing
   radiusAuthServerInetAddressType, radiusAuthServerInetAddress, and

   radiusAuthClientServerInetPortNumber.  The purpose of these added MIB
   objects is to support version-neutral IP addressing formats.  The
   existing table containing radiusAuthServerAddress and
   radiusAuthClientServerPortNumber is deprecated.  The remaining MIB
   objects are carried forward from RFC 2618 into this document.  This
   memo also adds UNITS and REFERENCE clauses to selected objects.

   RFC 4001 [RFC4001], which defines the SMI Textual Conventions for
   IPv6 addresses, contains the following recommendation.

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

5.  Structure of the MIB Module

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

   However, it is possible for a RADIUS authentication entity to perform
   both client and server functions.  For example, a RADIUS proxy may
   act as a server to one or more RADIUS authentication clients, while
   simultaneously acting as an authentication client to one or more
   authentication servers.  In such situations, it is expected that
   RADIUS entities combining client and server functionality will
   support both the client and server MIBs.  The client MIB is defined
   in this document, and the server MIB is defined in [RFC4669].

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

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

6.  Deprecated Objects

   The deprecated table in this MIB is carried forward from RFC 2618
   [RFC2618].  There are two conditions under which it MAY be desirable
   for managed entities to continue to support the deprecated table:

   1.  The managed entity only supports IPv4 address formats.

   2.  The managed entity supports both IPv4 and IPv6 address formats,
       and the deprecated table is supported for backwards compatibility
       with older management stations.  This option SHOULD only be used
       when the IP addresses in the new table are in IPv4 format and can
       accurately be represented in both the new table and the
       deprecated table.

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

7.  Definitions

EID 29 (Verified) is as follows:

Section: 7

Original Text:

[[Around the page break from page 8 to page 9, and once more,
near the top of page 14]]

   --
   -- AccessRequests + PendingRequests + ClientTimeouts =
   -- Successfully received
   --

Corrected Text:

   --
   -- AccessRequests - PendingRequests - ClientTimeouts =
   -- Successfully received
   --
Notes:
I strongly suspect that this is wrong (-- and it does not either
match the presentation style of the formulae above in the text).
Conceptually, it makes no sense to count 'PendingRequests' and
'ClientTimeouts' as 'Successfully received', and the subsequent
DESCRIPTION clauses strongly support my suspicion that both
instances of this formula in fact be as above.

from pending
RADIUS-AUTH-CLIENT-MIB DEFINITIONS ::= BEGIN IMPORTS MODULE-IDENTITY, OBJECT-TYPE, OBJECT-IDENTITY, Counter32, Integer32, Gauge32, IpAddress, TimeTicks, mib-2 FROM SNMPv2-SMI SnmpAdminString FROM SNMP-FRAMEWORK-MIB InetAddressType, InetAddress, InetPortNumber FROM INET-ADDRESS-MIB MODULE-COMPLIANCE, OBJECT-GROUP FROM SNMPv2-CONF; radiusAuthClientMIB MODULE-IDENTITY LAST-UPDATED "200608210000Z" -- 21 August 2006 ORGANIZATION "IETF RADIUS Extensions Working Group." CONTACT-INFO " Bernard Aboba Microsoft One Microsoft Way Redmond, WA 98052 US Phone: +1 425 936 6605 EMail: bernarda@microsoft.com" DESCRIPTION "The MIB module for entities implementing the client side of the Remote Authentication Dial-In User Service (RADIUS) authentication protocol. Copyright (C) The Internet Society (2006). This version of this MIB module is part of RFC 4668; see the RFC itself for full legal notices." REVISION "200608210000Z" -- 21 August 2006 DESCRIPTION "Revised version as published in RFC 4668. This version obsoletes that of RFC 2618 by deprecating the MIB table containing IPv4-only address formats and defining a new table to add support for version neutral IP address formats. The remaining MIB objects from RFC 2618 are carried forward into this version." REVISION "199906110000Z" -- 11 Jun 1999 DESCRIPTION "Initial version as published in RFC 2618." ::= { radiusAuthentication 2 } radiusMIB OBJECT-IDENTITY STATUS current DESCRIPTION "The OID assigned to RADIUS MIB work by the IANA." ::= { mib-2 67 } radiusAuthentication OBJECT IDENTIFIER ::= {radiusMIB 1} radiusAuthClientMIBObjects OBJECT IDENTIFIER ::= { radiusAuthClientMIB 1 } radiusAuthClient OBJECT IDENTIFIER ::= { radiusAuthClientMIBObjects 1 } radiusAuthClientInvalidServerAddresses OBJECT-TYPE SYNTAX Counter32 UNITS "packets" MAX-ACCESS read-only STATUS current DESCRIPTION "The number of RADIUS Access-Response packets received from unknown addresses." ::= { radiusAuthClient 1 } radiusAuthClientIdentifier OBJECT-TYPE SYNTAX SnmpAdminString MAX-ACCESS read-only STATUS current DESCRIPTION "The NAS-Identifier of the RADIUS authentication client. This is not necessarily the same as sysName in MIB II." REFERENCE "RFC 2865 section 5.32" ::= { radiusAuthClient 2 } radiusAuthServerTable OBJECT-TYPE SYNTAX SEQUENCE OF RadiusAuthServerEntry MAX-ACCESS not-accessible STATUS deprecated DESCRIPTION "The (conceptual) table listing the RADIUS authentication servers with which the client shares a secret." ::= { radiusAuthClient 3 } radiusAuthServerEntry OBJECT-TYPE SYNTAX RadiusAuthServerEntry MAX-ACCESS not-accessible STATUS deprecated DESCRIPTION "An entry (conceptual row) representing a RADIUS authentication server with which the client shares a secret." INDEX { radiusAuthServerIndex } ::= { radiusAuthServerTable 1 } RadiusAuthServerEntry ::= SEQUENCE { radiusAuthServerIndex Integer32, radiusAuthServerAddress IpAddress, radiusAuthClientServerPortNumber Integer32, radiusAuthClientRoundTripTime TimeTicks, radiusAuthClientAccessRequests Counter32, radiusAuthClientAccessRetransmissions Counter32, radiusAuthClientAccessAccepts Counter32, radiusAuthClientAccessRejects Counter32, radiusAuthClientAccessChallenges Counter32, radiusAuthClientMalformedAccessResponses Counter32, radiusAuthClientBadAuthenticators Counter32, radiusAuthClientPendingRequests Gauge32, radiusAuthClientTimeouts Counter32, radiusAuthClientUnknownTypes Counter32, radiusAuthClientPacketsDropped Counter32 } radiusAuthServerIndex OBJECT-TYPE SYNTAX Integer32 (1..2147483647) MAX-ACCESS not-accessible STATUS deprecated DESCRIPTION "A number uniquely identifying each RADIUS Authentication server with which this client communicates." ::= { radiusAuthServerEntry 1 } radiusAuthServerAddress OBJECT-TYPE SYNTAX IpAddress MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The IP address of the RADIUS authentication server referred to in this table entry." ::= { radiusAuthServerEntry 2 } radiusAuthClientServerPortNumber OBJECT-TYPE SYNTAX Integer32 (0..65535) MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The UDP port the client is using to send requests to this server." REFERENCE "RFC 2865 section 3" ::= { radiusAuthServerEntry 3 } radiusAuthClientRoundTripTime OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The time interval (in hundredths of a second) between the most recent Access-Reply/Access-Challenge and the Access-Request that matched it from this RADIUS authentication server." ::= { radiusAuthServerEntry 4 } -- Request/Response statistics -- -- TotalIncomingPackets = Accepts + Rejects + Challenges + -- UnknownTypes -- -- TotalIncomingPackets - MalformedResponses - -- BadAuthenticators - UnknownTypes - PacketsDropped = -- Successfully received -- -- AccessRequests + PendingRequests + ClientTimeouts = -- Successfully received -- -- radiusAuthClientAccessRequests OBJECT-TYPE SYNTAX Counter32 UNITS "packets" MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The number of RADIUS Access-Request packets sent to this server. This does not include retransmissions." REFERENCE "RFC 2865 section 4.1" ::= { radiusAuthServerEntry 5 } radiusAuthClientAccessRetransmissions OBJECT-TYPE SYNTAX Counter32 UNITS "packets" MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The number of RADIUS Access-Request packets retransmitted to this RADIUS authentication server." REFERENCE "RFC 2865 sections 2.5, 4.1" ::= { radiusAuthServerEntry 6 } radiusAuthClientAccessAccepts OBJECT-TYPE SYNTAX Counter32 UNITS "packets" MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The number of RADIUS Access-Accept packets (valid or invalid) received from this server." REFERENCE "RFC 2865 section 4.2" ::= { radiusAuthServerEntry 7 } radiusAuthClientAccessRejects OBJECT-TYPE SYNTAX Counter32 UNITS "packets" MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The number of RADIUS Access-Reject packets (valid or invalid) received from this server." REFERENCE "RFC 2865 section 4.3" ::= { radiusAuthServerEntry 8 } radiusAuthClientAccessChallenges OBJECT-TYPE SYNTAX Counter32 UNITS "packets" MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The number of RADIUS Access-Challenge packets (valid or invalid) received from this server." REFERENCE "RFC 2865 section 4.4" ::= { radiusAuthServerEntry 9 } -- "Access-Response" includes an Access-Accept, Access-Challenge -- or Access-Reject radiusAuthClientMalformedAccessResponses OBJECT-TYPE SYNTAX Counter32 UNITS "packets" MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The number of malformed RADIUS Access-Response packets received from this server. Malformed packets include packets with an invalid length. Bad authenticators or Message Authenticator attributes or unknown types are not included as malformed access responses." ::= { radiusAuthServerEntry 10 } radiusAuthClientBadAuthenticators OBJECT-TYPE SYNTAX Counter32 UNITS "packets" MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The number of RADIUS Access-Response packets containing invalid authenticators or Message Authenticator attributes received from this server." REFERENCE "RFC 2865 section 3, RFC 2869 section 5.14" ::= { radiusAuthServerEntry 11 } radiusAuthClientPendingRequests OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The number of RADIUS Access-Request packets destined for this server that have not yet timed out or received a response. This variable is incremented when an Access-Request is sent and decremented due to receipt of an Access-Accept, Access-Reject, Access-Challenge, timeout, or retransmission." REFERENCE "RFC 2865 section 2" ::= { radiusAuthServerEntry 12 } radiusAuthClientTimeouts OBJECT-TYPE SYNTAX Counter32 UNITS "timeouts" MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The number of authentication timeouts to this server. After a timeout, the client may retry to the same server, send to a different server, or give up. A retry to the same server is counted as a retransmit as well as a timeout. A send to a different server is counted as a Request as well as a timeout." REFERENCE "RFC 2865 section 2, RFC 2869 section 2.3.2" ::= { radiusAuthServerEntry 13 } radiusAuthClientUnknownTypes OBJECT-TYPE SYNTAX Counter32 UNITS "packets" MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The number of RADIUS packets of unknown type that were received from this server on the authentication port." ::= { radiusAuthServerEntry 14 } radiusAuthClientPacketsDropped OBJECT-TYPE SYNTAX Counter32 UNITS "packets" MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The number of RADIUS packets that were received from this server on the authentication port and dropped for some other reason." ::= { radiusAuthServerEntry 15 } -- New MIB Objects in this revision radiusAuthServerExtTable OBJECT-TYPE SYNTAX SEQUENCE OF RadiusAuthServerExtEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The (conceptual) table listing the RADIUS authentication servers with which the client shares a secret." ::= { radiusAuthClient 4 } radiusAuthServerExtEntry OBJECT-TYPE SYNTAX RadiusAuthServerExtEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry (conceptual row) representing a RADIUS authentication server with which the client shares a secret." INDEX { radiusAuthServerExtIndex } ::= { radiusAuthServerExtTable 1 } RadiusAuthServerExtEntry ::= SEQUENCE { radiusAuthServerExtIndex Integer32, radiusAuthServerInetAddressType InetAddressType, radiusAuthServerInetAddress InetAddress, radiusAuthClientServerInetPortNumber InetPortNumber, radiusAuthClientExtRoundTripTime TimeTicks, radiusAuthClientExtAccessRequests Counter32, radiusAuthClientExtAccessRetransmissions Counter32, radiusAuthClientExtAccessAccepts Counter32, radiusAuthClientExtAccessRejects Counter32, radiusAuthClientExtAccessChallenges Counter32, radiusAuthClientExtMalformedAccessResponses Counter32, radiusAuthClientExtBadAuthenticators Counter32, radiusAuthClientExtPendingRequests Gauge32, radiusAuthClientExtTimeouts Counter32, radiusAuthClientExtUnknownTypes Counter32, radiusAuthClientExtPacketsDropped Counter32, radiusAuthClientCounterDiscontinuity TimeTicks } radiusAuthServerExtIndex OBJECT-TYPE SYNTAX Integer32 (1..2147483647) MAX-ACCESS not-accessible STATUS current DESCRIPTION "A number uniquely identifying each RADIUS Authentication server with which this client communicates." ::= { radiusAuthServerExtEntry 1 } radiusAuthServerInetAddressType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS read-only STATUS current DESCRIPTION "The type of address format used for the radiusAuthServerInetAddress object." ::= { radiusAuthServerExtEntry 2 } radiusAuthServerInetAddress OBJECT-TYPE SYNTAX InetAddress MAX-ACCESS read-only STATUS current DESCRIPTION "The IP address of the RADIUS authentication server referred to in this table entry, using the version-neutral IP address format." ::= { radiusAuthServerExtEntry 3 } radiusAuthClientServerInetPortNumber OBJECT-TYPE SYNTAX InetPortNumber ( 1..65535 ) MAX-ACCESS read-only STATUS current DESCRIPTION "The UDP port the client is using to send requests to this server. The value of zero (0) is invalid." REFERENCE "RFC 2865 section 3" ::= { radiusAuthServerExtEntry 4 } radiusAuthClientExtRoundTripTime OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS current DESCRIPTION "The time interval (in hundredths of a second) between the most recent Access-Reply/Access-Challenge and the Access-Request that matched it from this RADIUS authentication server." REFERENCE "RFC 2865 section 2" ::= { radiusAuthServerExtEntry 5 } -- Request/Response statistics -- -- TotalIncomingPackets = Accepts + Rejects + Challenges + -- UnknownTypes -- -- TotalIncomingPackets - MalformedResponses - -- BadAuthenticators - UnknownTypes - PacketsDropped = -- Successfully received -- -- AccessRequests + PendingRequests + ClientTimeouts = -- Successfully received -- -- radiusAuthClientExtAccessRequests OBJECT-TYPE SYNTAX Counter32 UNITS "packets" MAX-ACCESS read-only STATUS current DESCRIPTION "The number of RADIUS Access-Request packets sent to this server. This does not include retransmissions. This counter may experience a discontinuity when the RADIUS Client module within the managed entity is reinitialized, as indicated by the current value of radiusAuthClientCounterDiscontinuity." REFERENCE "RFC 2865 section 4.1" ::= { radiusAuthServerExtEntry 6 } radiusAuthClientExtAccessRetransmissions OBJECT-TYPE SYNTAX Counter32 UNITS "packets" MAX-ACCESS read-only STATUS current DESCRIPTION "The number of RADIUS Access-Request packets retransmitted to this RADIUS authentication server. This counter may experience a discontinuity when the RADIUS Client module within the managed entity is reinitialized, as indicated by the current value of radiusAuthClientCounterDiscontinuity." REFERENCE "RFC 2865 sections 2.5, 4.1" ::= { radiusAuthServerExtEntry 7 } radiusAuthClientExtAccessAccepts OBJECT-TYPE SYNTAX Counter32 UNITS "packets" MAX-ACCESS read-only STATUS current DESCRIPTION "The number of RADIUS Access-Accept packets (valid or invalid) received from this server. This counter may experience a discontinuity when the RADIUS Client module within the managed entity is reinitialized, as indicated by the current value of radiusAuthClientCounterDiscontinuity." REFERENCE "RFC 2865 section 4.2" ::= { radiusAuthServerExtEntry 8 } radiusAuthClientExtAccessRejects OBJECT-TYPE SYNTAX Counter32 UNITS "packets" MAX-ACCESS read-only STATUS current DESCRIPTION "The number of RADIUS Access-Reject packets (valid or invalid) received from this server. This counter may experience a discontinuity when the RADIUS Client module within the managed entity is reinitialized, as indicated by the current value of radiusAuthClientCounterDiscontinuity." REFERENCE "RFC 2865 section 4.3" ::= { radiusAuthServerExtEntry 9 } radiusAuthClientExtAccessChallenges OBJECT-TYPE SYNTAX Counter32 UNITS "packets" MAX-ACCESS read-only STATUS current DESCRIPTION "The number of RADIUS Access-Challenge packets (valid or invalid) received from this server. This counter may experience a discontinuity when the RADIUS Client module within the managed entity is reinitialized, as indicated by the current value of radiusAuthClientCounterDiscontinuity." REFERENCE "RFC 2865 section 4.4" ::= { radiusAuthServerExtEntry 10 } -- "Access-Response" includes an Access-Accept, Access-Challenge, -- or Access-Reject radiusAuthClientExtMalformedAccessResponses OBJECT-TYPE SYNTAX Counter32 UNITS "packets" MAX-ACCESS read-only STATUS current DESCRIPTION "The number of malformed RADIUS Access-Response packets received from this server. Malformed packets include packets with an invalid length. Bad authenticators or Message Authenticator attributes or unknown types are not included as malformed access responses. This counter may experience a discontinuity when the RADIUS Client module within the managed entity is reinitialized, as indicated by the current value of radiusAuthClientCounterDiscontinuity." REFERENCE "RFC 2865 sections 3, 4" ::= { radiusAuthServerExtEntry 11 } radiusAuthClientExtBadAuthenticators OBJECT-TYPE SYNTAX Counter32 UNITS "packets" MAX-ACCESS read-only STATUS current DESCRIPTION "The number of RADIUS Access-Response packets containing invalid authenticators or Message Authenticator attributes received from this server. This counter may experience a discontinuity when the RADIUS Client module within the managed entity is reinitialized, as indicated by the current value of radiusAuthClientCounterDiscontinuity." REFERENCE "RFC 2865 section 3" ::= { radiusAuthServerExtEntry 12 } radiusAuthClientExtPendingRequests OBJECT-TYPE SYNTAX Gauge32 UNITS "packets" MAX-ACCESS read-only STATUS current DESCRIPTION "The number of RADIUS Access-Request packets destined for this server that have not yet timed out or received a response. This variable is incremented when an Access-Request is sent and decremented due to receipt of an Access-Accept, Access-Reject, Access-Challenge, timeout, or retransmission." REFERENCE "RFC 2865 section 2" ::= { radiusAuthServerExtEntry 13 } radiusAuthClientExtTimeouts OBJECT-TYPE SYNTAX Counter32 UNITS "timeouts" MAX-ACCESS read-only STATUS current DESCRIPTION "The number of authentication timeouts to this server. After a timeout, the client may retry to the same server, send to a different server, or give up. A retry to the same server is counted as a retransmit as well as a timeout. A send to a different server is counted as a Request as well as a timeout. This counter may experience a discontinuity when the RADIUS Client module within the managed entity is reinitialized, as indicated by the current value of radiusAuthClientCounterDiscontinuity." REFERENCE "RFC 2865 sections 2.5, 4.1" ::= { radiusAuthServerExtEntry 14 } radiusAuthClientExtUnknownTypes 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 server on the authentication port. This counter may experience a discontinuity when the RADIUS Client module within the managed entity is reinitialized, as indicated by the current value of radiusAuthClientCounterDiscontinuity." REFERENCE "RFC 2865 section 4" ::= { radiusAuthServerExtEntry 15 } radiusAuthClientExtPacketsDropped OBJECT-TYPE SYNTAX Counter32 UNITS "packets" MAX-ACCESS read-only STATUS current DESCRIPTION "The number of RADIUS packets that were received from this server on the authentication port and dropped for some other reason. This counter may experience a discontinuity when the RADIUS Client module within the managed entity is reinitialized, as indicated by the current value of radiusAuthClientCounterDiscontinuity." ::= { radiusAuthServerExtEntry 16 } radiusAuthClientCounterDiscontinuity OBJECT-TYPE SYNTAX TimeTicks UNITS "centiseconds" MAX-ACCESS read-only STATUS current DESCRIPTION "The number of centiseconds since the last discontinuity in the RADIUS Client counters. A discontinuity may be the result of a reinitialization of the RADIUS Client module within the managed entity." ::= { radiusAuthServerExtEntry 17 } -- conformance information radiusAuthClientMIBConformance OBJECT IDENTIFIER ::= { radiusAuthClientMIB 2 } radiusAuthClientMIBCompliances OBJECT IDENTIFIER ::= { radiusAuthClientMIBConformance 1 } radiusAuthClientMIBGroups OBJECT IDENTIFIER ::= { radiusAuthClientMIBConformance 2 } -- compliance statements radiusAuthClientMIBCompliance MODULE-COMPLIANCE STATUS deprecated DESCRIPTION "The compliance statement for authentication clients implementing the RADIUS Authentication Client 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 { radiusAuthClientMIBGroup } ::= { radiusAuthClientMIBCompliances 1 } radiusAuthClientExtMIBCompliance MODULE-COMPLIANCE STATUS current DESCRIPTION "The compliance statement for authentication clients implementing the RADIUS Authentication Client IPv6 Extensions MIB. Implementation of this module is for entities that support IPv6, or support IPv4 and IPv6." MODULE -- this module MANDATORY-GROUPS { radiusAuthClientExtMIBGroup } OBJECT radiusAuthServerInetAddressType SYNTAX InetAddressType { ipv4(1), ipv6(2) } DESCRIPTION "An implementation is only required to support IPv4 and globally unique IPv6 addresses." OBJECT radiusAuthServerInetAddress SYNTAX InetAddress ( SIZE (4|16) ) DESCRIPTION "An implementation is only required to support IPv4 and globally unique IPv6 addresses." ::= { radiusAuthClientMIBCompliances 2 } -- units of conformance radiusAuthClientMIBGroup OBJECT-GROUP OBJECTS { radiusAuthClientIdentifier, radiusAuthClientInvalidServerAddresses, radiusAuthServerAddress, radiusAuthClientServerPortNumber, radiusAuthClientRoundTripTime, radiusAuthClientAccessRequests, radiusAuthClientAccessRetransmissions, radiusAuthClientAccessAccepts, radiusAuthClientAccessRejects, radiusAuthClientAccessChallenges, radiusAuthClientMalformedAccessResponses, radiusAuthClientBadAuthenticators, radiusAuthClientPendingRequests, radiusAuthClientTimeouts, radiusAuthClientUnknownTypes, radiusAuthClientPacketsDropped } STATUS deprecated DESCRIPTION "The basic collection of objects providing management of RADIUS Authentication Clients." ::= { radiusAuthClientMIBGroups 1 } radiusAuthClientExtMIBGroup OBJECT-GROUP OBJECTS { radiusAuthClientIdentifier, radiusAuthClientInvalidServerAddresses, radiusAuthServerInetAddressType, radiusAuthServerInetAddress, radiusAuthClientServerInetPortNumber, radiusAuthClientExtRoundTripTime, radiusAuthClientExtAccessRequests, radiusAuthClientExtAccessRetransmissions, radiusAuthClientExtAccessAccepts, radiusAuthClientExtAccessRejects, radiusAuthClientExtAccessChallenges, radiusAuthClientExtMalformedAccessResponses, radiusAuthClientExtBadAuthenticators, radiusAuthClientExtPendingRequests, radiusAuthClientExtTimeouts, radiusAuthClientExtUnknownTypes, radiusAuthClientExtPacketsDropped, radiusAuthClientCounterDiscontinuity } STATUS current DESCRIPTION "The collection of extended objects providing management of RADIUS Authentication Clients using version-neutral IP address format." ::= { radiusAuthClientMIBGroups 2 } END 8. Security Considerations There are no management objects defined in this MIB that have a MAX- ACCESS clause of read-write and/or read-create. So, if this MIB is implemented correctly, then there is no risk that an intruder can alter or create any management objects of this MIB 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: radiusAuthServerIPAddress This can be used to determine the address of the RADIUS authentication server with which the client is communicating. This information could be useful in mounting an attack on the authentication server. radiusAuthClientServerPortNumber This can be used to determine the port number on which the RADIUS authentication client is sending. This information could be useful in impersonating the client in order to send data to the authentication server. radiusAuthServerInetAddress This can be used to determine the address of the RADIUS authentication server with which the client is communicating. This information could be useful in mounting an attack on the authentication server. radiusAuthClientServerInetPortNumber This can be used to determine the port number on which the RADIUS authentication client is sending. This information could be useful in impersonating the client in order to send data to the authentication server. 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. 9. References 9.1. Normative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. [RFC2578] McCloghrie, K., 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. 9.2. Informative References [RFC2618] Aboba, B. and G. Zorn, "RADIUS Authentication Client MIB", RFC 2618, 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. [RFC4669] Nelson, D., "RADIUS Authentication Server MIB for IPv6", RFC 4669, August 2006. Appendix A. Acknowledgements The authors of the original MIB are Bernard Aboba and Glen Zorn. Many thanks to all reviewers, especially to Dave 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: dnelson@enterasys.com Full Copyright Statement Copyright (C) The Internet Society (2006). 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