|
Network Working Group Request for Comments: 4669 Obsoletes: 2619 Category: Standards Track |
D. Nelson Enterasys Networks August 2006 |
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 © The Internet Society (2006).
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.
1. Introduction
2. Terminology
3. The Internet-Standard Management Framework
4. Scope of Changes
5. Structure of the MIB Module
6. Deprecated Objects
7. Definitions
8. Security Considerations
9. References
9.1. Normative References
9.2. Informative References
Appendix A. Acknowledgements
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].
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".
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].
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.'
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].
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:
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.
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: bernarda@microsoft.com"
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
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.
[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.
[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.
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.
David B. Nelson
Enterasys Networks
50 Minuteman Road
Andover, MA 01810
USA
EMail: dnelson@enterasys.com
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