organizations are already using, or causing applications to use a
hop limit that results in extra bandwidth usage.
mallocScopeNameTable:
Unauthorized modifications to this table can result in incorrect
or misleading scope names being presented to users, resulting in
potentially using the wrong scope for application data.
madcapConfigExtraAllocationTime,madcapConfigOfferHold:
Unauthorized modifications to these objects can result in
reservations lasting too long, potentially resulting in denial of
service if allocation ranges are small.
madcapConfigNoResponseDelay:
Unauthorized modifications can result in a client not being able
to allocate multicast addresses.
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 GET and/or NOTIFY access to these objects and possibly to
encrypt the values of these objects when sending them over the
network via SNMP. These are the tables and objects and their
sensitivity/vulnerability:
mallocRequestLeaseIdentifier:
If address allocation servers are configured to allow renewal or
release purely on the basis of knowledge of the Lease Identifier,
then unauthorized read access to mallocRequestLeaseIdentifier can
be used in a denial-of-service attack.
SNMP versions prior to SNMPv3 did not include adequate security.
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 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 for only those
principals (users) with legitimate rights to have access to GET or
SET (change/create/delete) objects.
7. Acknowledgements
This MIB module was updated based on feedback from the IETF's
Multicast Address Allocation (MALLOC) Working Group. Lars Viklund,
Frank Strauss, and Mike Heard provided helpful feedback on this
document.
8. Intellectual Property Statement
The IETF takes no position regarding the validity or scope of any
intellectual property or other rights that might be claimed to
pertain to the implementation or use of the technology described in
this document or the extent to which any license under such rights
might or might not be available; neither does it represent that it
has made any effort to identify any such rights. Information on the
IETF's procedures with respect to rights in standards-track and
standards-related documentation can be found in BCP-11. Copies of
claims of rights made available for publication and any assurances of
licenses to be made available, or the result of an attempt made to
obtain a general license or permission for the use of such
proprietary rights by implementors or users of this specification can
be obtained from the IETF Secretariat.
The IETF invites any interested party to bring to its attention any
copyrights, patents or patent applications, or other proprietary
rights which may cover technology that may be required to practice
this standard. Please address the information to the IETF Executive
Director.
9. References
9.1. Normative References
[ARCH] Thaler, D., Handley, M. and D. Estrin, "The Internet
Multicast Address Allocation Architecture", RFC2908,
September 2000.
[MADCAP] Hanna, S., Patel, B. and M. Shah, "Multicast Address
Dynamic Client Allocation Protocol (MADCAP)", RFC2730,
December 1999.
[RFC2578] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J.,
Rose, M. and S. Waldbusser, "Structure of Management
Information Version 2 (SMIv2)", STD 58, RFC2578, April
1999.
[RFC2579] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J.,
Rose, M. and S. Waldbusser, "Textual Conventions for
SMIv2", STD 58, RFC2579, April 1999.
[RFC2580] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J.,
Rose, M. and S. Waldbusser, "Conformance Statements for
SMIv2", STD 58, RFC2580, April 1999.
[RFC2932] McCloghrie, K., Farinacci, D. and D. Thaler, "IPv4
Multicast Routing MIB", RFC2932, October 2000.
[RFC3291] Daniele, M., Haberman, B., Routhier, S. and J.
Schoenwaelder, "Textual Conventions for Internet Network
Addresses", RFC3291, May 2002.
[RFC3411] Harrington, D., Presuhn, R. and B. Wijnen, "An Architecture
for Describing Simple Network Management Protocol (SNMP)
Management Frameworks", STD 62, RFC3411, December 2002.
9.2. Informative References
[IPSEC] Kent, S. and R. Atkinson, "Security Architecture for the
Internet Protocol", RFC2401, November 1998.
[MZAP] Handley, M., Thaler, D. and R. Kermode, "Multicast-Scope
Zone Announcement Protocol (MZAP)", RFC2776, February
2000.
[RFC3410] Case, J., Mundy, R., Partain, D. and B. Stewart,
"Introduction and Applicability Statements for Internet
Standard Management Framework", RFC3410, December 2002.
10. Author's Address
Dave Thaler
Microsoft Corporation
One Microsoft Way
Redmond, WA 98052-6399
Phone: +1 425 703 8835
EMail: dthaler@microsoft.com
11. Full Copyright Statement
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