udpEndpointLocalAddressType object representing the
appropriate address type.
As this object is used in the index for the
udpEndpointTable, implementors of this table should be
careful not to create entries that would result in OIDs
with more than 128 subidentifiers; else the information
cannot be accessed using SNMPv1, SNMPv2c, or SNMPv3."
::= { udpEndpointEntry 2 }
udpEndpointLocalPort OBJECT-TYPE
SYNTAX InetPortNumber
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The local port number for this UDP endpoint."
::= { udpEndpointEntry 3 }
udpEndpointRemoteAddressType OBJECT-TYPE
SYNTAX InetAddressType
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The address type of udpEndpointRemoteAddress. Only
IPv4, IPv4z, IPv6, and IPv6z addresses are expected, or
unknown(0) if datagrams for all remote IP addresses are
accepted. Also, note that some combinations of
udpEndpointLocalAdressType and
udpEndpointRemoteAddressType are not supported. In
particular, if the value of this object is not
unknown(0), it is expected to always refer to the
same IP version as udpEndpointLocalAddressType."
::= { udpEndpointEntry 4 }
udpEndpointRemoteAddress OBJECT-TYPE
SYNTAX InetAddress
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The remote IP address for this UDP endpoint. If
datagrams from any remote system are to be accepted,
this value is ’’h (a zero-length octet-string).
Otherwise, it has the type described by
udpEndpointRemoteAddressType and is the address of the
remote system from which datagrams are to be accepted
(or to which all datagrams will be sent).
As this object is used in the index for the
udpEndpointTable, implementors of this table should be
careful not to create entries that would result in OIDs
with more than 128 subidentifiers; else the information
cannot be accessed using SNMPv1, SNMPv2c, or SNMPv3."
::= { udpEndpointEntry 5 }
udpEndpointRemotePort OBJECT-TYPE
SYNTAX InetPortNumber
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The remote port number for this UDP endpoint. If
datagrams from any remote system are to be accepted,
this value is zero."
::= { udpEndpointEntry 6 }
udpEndpointInstance OBJECT-TYPE
SYNTAX Unsigned32 (1..’ffffffff’h)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The instance of this tuple. This object is used to
distinguish among multiple processes ’connected’ to
the same UDP endpoint. For example, on a system
implementing the BSD sockets interface, this would be
used to support the SO_REUSEADDR and SO_REUSEPORT
socket options."
::= { udpEndpointEntry 7 }
udpEndpointProcess OBJECT-TYPE
SYNTAX Unsigned32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The system’s process ID for the process associated with
this endpoint, or zero if there is no such process.
This value is expected to be the same as
HOST-RESOURCES-MIB::hrSWRunIndex or SYSAPPL-MIB::
sysApplElmtRunIndex for some row in the appropriate
tables."
::= { udpEndpointEntry 8 }
-- The deprecated UDP Listener table
-- The deprecated UDP listener table only contains information
-- about this entity’s IPv4 UDP end-points on which a local
-- application is currently accepting datagrams. It does not
-- provide more detailed connection information, or information
-- about IPv6 endpoints.
udpTable OBJECT-TYPE
SYNTAX SEQUENCE OF UdpEntry
MAX-ACCESS not-accessible
STATUS deprecated
DESCRIPTION
"A table containing IPv4-specific UDP listener
information. It contains information about all local
IPv4 UDP end-points on which an application is
currently accepting datagrams. This table has been
deprecated in favor of the version neutral
udpEndpointTable."
::= { udp 5 }
udpEntry OBJECT-TYPE
SYNTAX UdpEntry
MAX-ACCESS not-accessible
STATUS deprecated
DESCRIPTION
"Information about a particular current UDP listener."
INDEX { udpLocalAddress, udpLocalPort }
::= { udpTable 1 }
UdpEntry ::= SEQUENCE {
udpLocalAddress IpAddress,
udpLocalPort Integer32
}
udpLocalAddress OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The local IP address for this UDP listener. In the
case of a UDP listener that is willing to accept
datagrams for any IP interface associated with the
node, the value 0.0.0.0 is used."
::= { udpEntry 1 }
udpLocalPort OBJECT-TYPE
SYNTAX Integer32 (0..65535)
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The local port number for this UDP listener."
::= { udpEntry 2 }
-- conformance information
udpMIBConformance OBJECT IDENTIFIER ::= { udpMIB 2 }
udpMIBCompliances OBJECT IDENTIFIER ::= { udpMIBConformance 1 }
udpMIBGroups OBJECT IDENTIFIER ::= { udpMIBConformance 2 }
-- compliance statements
udpMIBCompliance2 MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"The compliance statement for systems that implement
UDP.
There are a number of INDEX objects that cannot be
represented in the form of OBJECT clauses in SMIv2, but
for which we have the following compliance
requirements, expressed in OBJECT clause form in this
description clause:
-- OBJECT udpEndpointLocalAddressType
-- SYNTAX InetAddressType { unknown(0), ipv4(1),
-- ipv6(2), ipv4z(3),
-- ipv6z(4) }
-- DESCRIPTION
-- Support for dns(5) is not required.
-- OBJECT udpEndpointLocalAddress
-- SYNTAX InetAddress (SIZE(0|4|8|16|20))
-- DESCRIPTION
-- Support is only required for zero-length
-- octet-strings, and for scoped and unscoped
-- IPv4 and IPv6 addresses.
-- OBJECT udpEndpointRemoteAddressType
-- SYNTAX InetAddressType { unknown(0), ipv4(1),
-- ipv6(2), ipv4z(3),
-- ipv6z(4) }
-- DESCRIPTION
-- Support for dns(5) is not required.
-- OBJECT udpEndpointRemoteAddress
-- SYNTAX InetAddress (SIZE(0|4|8|16|20))
-- DESCRIPTION
-- Support is only required for zero-length
-- octet-strings, and for scoped and unscoped
-- IPv4 and IPv6 addresses.
"
MODULE -- this module
MANDATORY-GROUPS { udpBaseGroup, udpEndpointGroup }
GROUP udpHCGroup
DESCRIPTION
"This group is mandatory for systems that
are capable of receiving or transmitting more than
1 million UDP datagrams per second. 1 million
datagrams per second will cause a Counter32 to
wrap in just over an hour."
::= { udpMIBCompliances 2 }
udpMIBCompliance MODULE-COMPLIANCE
STATUS deprecated
DESCRIPTION
"The compliance statement for IPv4-only systems that
implement UDP. For IP version independence, this
compliance statement is deprecated in favor of
udpMIBCompliance2. However, agents are still
encouraged to implement these objects in order to
interoperate with the deployed base of managers."
MODULE -- this module
MANDATORY-GROUPS { udpGroup }
::= { udpMIBCompliances 1 }
-- units of conformance
udpGroup OBJECT-GROUP
OBJECTS { udpInDatagrams, udpNoPorts,
udpInErrors, udpOutDatagrams,
udpLocalAddress, udpLocalPort }
STATUS deprecated
DESCRIPTION
"The deprecated group of objects providing for
management of UDP over IPv4."
::= { udpMIBGroups 1 }
udpBaseGroup OBJECT-GROUP
OBJECTS { udpInDatagrams, udpNoPorts, udpInErrors,
udpOutDatagrams }
STATUS current
DESCRIPTION
"The group of objects providing for counters of UDP
statistics."
::= { udpMIBGroups 2 }
udpHCGroup OBJECT-GROUP
OBJECTS { udpHCInDatagrams, udpHCOutDatagrams }
STATUS current
DESCRIPTION
"The group of objects providing for counters of high
speed UDP implementations."
::= { udpMIBGroups 3 }
udpEndpointGroup OBJECT-GROUP
OBJECTS { udpEndpointProcess }
STATUS current
DESCRIPTION
"The group of objects providing for the IP version
independent management of UDP ’endpoints’."
::= { udpMIBGroups 4 }
END
4. Acknowledgements
This document contains a modified subset of RFC 1213 and replaces
RFCs 2013 and 2454. Acknowledgments are therefore due to the authors
and editors of these documents for their excellent work.
5. Contributors
This document is an output of the IPv6 MIB revision team, and
contributors to earlier versions of this document include:
Bill Fenner, AT&T Labs -- Research
Email: fenner@research.at.com
Brian Haberman
Email: brian@innovationslab.net
Shawn A. Routhier, Wind River
Email: sar@epilogue.com
Juergen Schoenwalder, TU Braunschweig
Email: schoenw@ibr.cs.tu-bs.de
Dave Thaler, Microsoft
Email: dthaler@windows.microsoft.com
Much of Keith McCloghrie’s text from RFC1213/RFC2013 remains in this
document, and the structure of the MIB is due to him.
Mike Daniele wrote the original IPv6 UDP MIB in RFC2454.
Juergen Schoenwalder provided much of the text for section 2.
6. 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 module 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:
The indices of the udpEndpointTable and udpTable contain information
on the listeners on an entity. In particular, the
udpEndpointLocalPort and udpLocalPort objects in the indices can be
used to identify what ports are open on the machine and what attacks
are likely to succeed, without the attacker having to run a port
scanner.
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 the implementors 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).
Furthermore, 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.
7. IANA Considerations
The MIB module in this document uses the following IANA-assigned
OBJECT IDENTIFIER values, recorded in the SMI Numbers registry:
+------------+-------------------------+
| Descriptor | OBJECT IDENTIFIER value |
+------------+-------------------------+
| udp | { mib-2 7} |
| udpMIB | { mib-2 50 } |
+------------+-------------------------+
8. References
8.1. Normative References
[RFC0768] Postel, J., "User Datagram Protocol", STD 6, RFC 768,
August 1980.
[RFC2578] McCloghrie, K., Perkins, D., and J. Schoenwaelder,
"Structure of Management Information Version 2 (SMIv2)",
STD 58, RFC 2578, April 1999.
[RFC2579] McCloghrie, K., Perkins, D., and J. Schoenwaelder,
"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.
[RFC3418] Presuhn, R., "Management Information Base (MIB) for the
Simple Network Management Protocol (SNMP)", STD 62, RFC
3418, December 2002.
[RFC4001] Daniele, M., Haberman, B., Routhier, S., and J.
Schoenwaelder, "Textual Conventions for Internet Network
Addresses", RFC 4001, February 2005.
8.2. Informative References
[RFC1213] McCloghrie, K. and M. Rose, "Management Information Base
for Network Management of TCP/IP-based internets:MIB-II",
STD 17, RFC 1213, March 1991.
[RFC2013] McCloghrie, K., "SNMPv2 Management Information Base for
the User Datagram Protocol using SMIv2", RFC 2013,
November 1996.
[RFC2287] Krupczak, C. and J. Saperia, "Definitions of System-Level
Managed Objects for Applications", RFC 2287, February
1998.
[RFC2454] Daniele, M., "IP Version 6 Management Information Base for
the User Datagram Protocol", RFC 2454, December 1998.
[RFC2790] Waldbusser, S. and P. Grillo, "Host Resources MIB", RFC
2790, March 2000.
[RFC3410] Case, J., Mundy, R., Partain, D., and B. Stewart,
"Introduction and Applicability Statements for Internet-
Standard Management Framework", RFC 3410, December 2002.
Authors’ Addresses
Bill Fenner
AT&T Labs -- Research
75 Willow Rd
Menlo Park, CA 94025
USA
EMail: fenner@research.att.com
John Flick
Hewlett-Packard Company
8000 Foothills Blvd. M/S 5557
Roseville, CA 95747-5557
USA
EMail: john.flick@hp.com
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