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
8. 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.
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
[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: dnelson@enterasys.com
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