RFC 2742
Definitions of Managed Objects for Extensible SNMP Agents
RFC 2742: Definitions of Managed Objects for Extensible SNMP Agents 💖
Okay bestie, let's start with the header stuff 🎀 This one comes from the Network Working Group and it's a Standards Track doc, so it's an official spec, not just an opinion piece. It was published in January 2000 🦋
The authors are L. Heintz (Cisco Systems), S. Gudur (Independent Consultant), and M. Ellison, Ed. (Ellison Software Consulting, Inc.). The header doesn't name any RFC that it obsoletes or updates, so it doesn't replace or change anything else 🙈
Status of this Memo
So this doc is a Standards Track protocol spec for the whole Internet community, and it's literally asking for discussion and suggestions for improvements 🫶 If you want to know where it officially stands, check the "Internet Official Protocol Standards" (STD 1) list. And the distribution of this memo is unlimited ✨
Copyright Notice
Copyright (C) The Internet Society (2000). All Rights Reserved.
Abstract
This memo defines a portion of the Management Information Base (MIB) for use with network management protocols in the Internet community 🌸 Specifically, it describes objects that manage SNMP agents using the Agent Extensibility (AgentX) Protocol. The MIB module is compliant to the SMIv2 and semantically identical to the peer SMIv1 definitions, so it's giving double compatibility 👑
Table of Contents
1. The SNMP Management Framework ............................... 2
2. Introduction ................................................ 3
3. AgentX MIB Overview ......................................... 3
4. Managed Object Definitions for AgentX ....................... 4
5. Intellectual Property ....................................... 15
6. Acknowledgements ............................................ 16
7. Security Considerations ..................................... 16
8. References .................................................. 17
9. Authors' and Editor's Addresses ............................. 19
10. Full Copyright Statement ................................... 201. The SNMP Management Framework ✨
Okay so the SNMP Management Framework is made of five major components, and I'm obsessed with how they fit together 💅
- An overall architecture, described in RFC 2571 [1].
- Mechanisms for describing and naming objects and events for the purpose of management. The first version of this Structure of Management Information (SMI) is called SMIv1 and is described in STD 16, RFC 1155 [2], STD 16, RFC 1212 [3] and RFC 1215 [4]. The second version, called SMIv2, is described in STD 58, RFC 2578 [5], STD 58, RFC 2579 [6] and STD 58, RFC 2580 [7].
- Message protocols for transferring management information. The first version of the SNMP message protocol is called SNMPv1 and is described in STD 15, RFC 1157 [8]. A second version of the SNMP message protocol, which is not an Internet standards track protocol, is called SNMPv2c and is described in RFC 1901 [9] and RFC 1906 [10]. The third version of the message protocol is called SNMPv3 and is described in RFC 1906 [10], RFC 2572 [11] and RFC 2574 [12].
- Protocol operations for accessing management information. The first set of protocol operations and associated PDU formats is described in STD 15, RFC 1157 [8]. A second set of protocol operations and associated PDU formats is described in RFC 1905 [13].
- A set of fundamental applications described in RFC 2573 [14] and the view-based access control mechanism described in RFC 2575 [15].
If you want a more detailed intro to the current SNMP Management Framework, go check out RFC 2570 [16] 🧚
Managed objects are accessed through a virtual information store called the Management Information Base, or MIB 🦋 Objects in the MIB are defined using the mechanisms defined in the SMI.
This memo specifies a MIB module that is compliant to the SMIv2. A MIB conforming to the SMIv1 can be produced through the appropriate translations. The resulting translated MIB must be semantically equivalent, except where objects or events are omitted because no translation is possible (use of Counter64). Some machine readable information in SMIv2 will be converted into textual descriptions in SMIv1 during the translation process. However, this loss of machine readable information is not considered to change the semantics of the MIB 💜
2. Introduction 🌈
The SNMP Agent Extensibility Protocol (AgentX) is a protocol used to spread the implementation of an SNMP agent across a single "master agent" and multiple "subagents". See [17] for details about the AgentX protocol 🫶
The goals of the AgentX MIB are:
- List the set of subagent connections that currently have logical sessions open with the master agent.
- Identify each subagent connection transport address and type.
- Identify each subagent session vendor, AgentX protocol version, and other characteristics.
- Identify the set of MIB objects each session implements, the context in which the objects are registered, and the priority of the registration.
- Determine protocol operational parameters such as the timeout interval for responses from a session and the priority at which a session registers a particular MIB region.
- Allow (but do not require) managers to explicitly close subagent sessions with the master agent. 🔥
3. AgentX MIB Overview 🍓
This MIB is organized into four groups. The agentxGeneral group provides information describing the master agent's AgentX support, including the protocol version supported. The agentxConnection group provides information describing the current set of connections capable of carrying AgentX sessions. The agentxSession group provides information describing the current set of AgentX sessions. The agentxRegistration group provides information describing the current set of registrations.
Three tables form the heart of this MIB 💖 They're the connection, session, and registration tables.
Entries in the registration table have a many-to-one relationship with entries in the session table. This relationship is expressed through the two common indices, agentxSessionIndex and agentxConnIndex. Entries in the registration table also have a many-to-one relationship with entries in the connection table, expressed through the common index agentxConnIndex.
Entries in the session table have a many-to-one relationship with entries in the connection table. This relationship is expressed through the common index agentxConnIndex ✨
4. Managed Object Definitions for AgentX 👑
Here's the actual MIB module, copied exactly as written 💅
AGENTX-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY, OBJECT-TYPE, Unsigned32, mib-2
FROM SNMPv2-SMI
SnmpAdminString
FROM SNMP-FRAMEWORK-MIB
MODULE-COMPLIANCE, OBJECT-GROUP
FROM SNMPv2-CONF
TEXTUAL-CONVENTION, TimeStamp, TruthValue, TDomain
FROM SNMPv2-TC;
agentxMIB MODULE-IDENTITY
LAST-UPDATED "200001100000Z" -- Midnight 10 January 2000
ORGANIZATION "AgentX Working Group"
CONTACT-INFO "WG-email: agentx@dorothy.bmc.com
Subscribe: agentx-request@dorothy.bmc.com
WG-email Archive: ftp://ftp.peer.com/pub/agentx/archives
FTP repository: ftp://ftp.peer.com/pub/agentx
http://www.ietf.org/html.charters/agentx-charter.html
Chair: Bob Natale
ACE*COMM Corporation
Email: bnatale@acecomm.com
WG editor: Mark Ellison
Ellison Software Consulting, Inc.
Email: ellison@world.std.com
Co-author: Lauren Heintz
Cisco Systems,
EMail: lheintz@cisco.com
Co-author: Smitha Gudur
Independent Consultant
Email: sgudur@hotmail.com
"
DESCRIPTION "This is the MIB module for the SNMP Agent Extensibility
Protocol (AgentX). This MIB module will be implemented by
the master agent.
"
REVISION "200001100000Z" -- Midnight 10 January 2000
DESCRIPTION
"Initial version published as RFC 2742."
::= { mib-2 74 }
-- Textual Conventions
AgentxTAddress ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"Denotes a transport service address. This is identical to
the TAddress textual convention (SNMPv2-SMI) except that
zero-length values are permitted.
"
SYNTAX OCTET STRING (SIZE (0..255))
-- Administrative assignments
agentxObjects OBJECT IDENTIFIER ::= { agentxMIB 1 }
agentxGeneral OBJECT IDENTIFIER ::= { agentxObjects 1 }
agentxConnection OBJECT IDENTIFIER ::= { agentxObjects 2 }
agentxSession OBJECT IDENTIFIER ::= { agentxObjects 3 }
agentxRegistration OBJECT IDENTIFIER ::= { agentxObjects 4 }
agentxDefaultTimeout OBJECT-TYPE
SYNTAX INTEGER (0..255)
UNITS "seconds"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The default length of time, in seconds, that the master
agent should allow to elapse after dispatching a message
to a session before it regards the subagent as not
responding. This is a system-wide value that may
override the timeout value associated with a particular
session (agentxSessionTimeout) or a particular registered
MIB region (agentxRegTimeout). If the associated value of
agentxSessionTimeout and agentxRegTimeout are zero, or
impractical in accordance with implementation-specific
procedure of the master agent, the value represented by
this object will be the effective timeout value for the
master agent to await a response to a dispatch from a
given subagent.
"
DEFVAL { 5 }
::= { agentxGeneral 1 }
agentxMasterAgentXVer OBJECT-TYPE
SYNTAX INTEGER (1..255)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The AgentX protocol version supported by this master agent.
The current protocol version is 1. Note that the master agent
must also allow interaction with earlier version subagents.
"
::= { agentxGeneral 2 }
-- The AgentX Subagent Connection Group
agentxConnTableLastChange OBJECT-TYPE
SYNTAX TimeStamp
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of sysUpTime when the last row creation or deletion
occurred in the agentxConnectionTable.
"
::= { agentxConnection 1 }
agentxConnectionTable OBJECT-TYPE
SYNTAX SEQUENCE OF AgentxConnectionEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The agentxConnectionTable tracks all current AgentX transport
connections. There may be zero, one, or more AgentX sessions
carried on a given AgentX connection.
"
::= { agentxConnection 2 }
agentxConnectionEntry OBJECT-TYPE
SYNTAX AgentxConnectionEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An agentxConnectionEntry contains information describing a
single AgentX transport connection. A connection may be
used to support zero or more AgentX sessions. An entry is
created when a new transport connection is established,
and is destroyed when the transport connection is terminated.
"
INDEX { agentxConnIndex }
::= { agentxConnectionTable 1 }
AgentxConnectionEntry ::= SEQUENCE {
agentxConnIndex Unsigned32,
agentxConnOpenTime TimeStamp,
agentxConnTransportDomain TDomain,
agentxConnTransportAddress AgentxTAddress }okay so the connection table is where we start, and it's giving organized 🎀✨
agentxConnIndex OBJECT-TYPE
SYNTAX Unsigned32 (1..4294967295)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"agentxConnIndex contains the value that uniquely identifies
an open transport connection used by this master agent
to provide AgentX service. Values of this index should
not be re-used. The value assigned to a given transport
connection is constant for the lifetime of that connection.
"
::= { agentxConnectionEntry 1 }
agentxConnOpenTime OBJECT-TYPE
SYNTAX TimeStamp
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of sysUpTime when this connection was established
and, therefore, its value when this entry was added to the table.
"
::= { agentxConnectionEntry 2 }
agentxConnTransportDomain OBJECT-TYPE
SYNTAX TDomain
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The transport protocol in use for this connection to the
subagent.
"
::= { agentxConnectionEntry 3 }
agentxConnTransportAddress OBJECT-TYPE
SYNTAX AgentxTAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The transport address of the remote (subagent) end of this
connection to the master agent. This object may be zero-length
for unix-domain sockets (and possibly other types of transport
addresses) since the subagent need not bind a filename to its
local socket.
"
::= { agentxConnectionEntry 4 }Next up is the session group 🦋 It's basically the list of every subagent session that's currently alive, with all the little details about each one.
-- The AgentX Subagent Session Group
agentxSessionTableLastChange OBJECT-TYPE
SYNTAX TimeStamp
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of sysUpTime when the last row creation or deletion
occurred in the agentxSessionTable.
"
::= { agentxSession 1 }
agentxSessionTable OBJECT-TYPE
SYNTAX SEQUENCE OF AgentxSessionEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of AgentX subagent sessions currently in effect.
"
::= { agentxSession 2 }
agentxSessionEntry OBJECT-TYPE
SYNTAX AgentxSessionEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Information about a single open session between the AgentX
master agent and a subagent is contained in this entry. An
entry is created when a new session is successfully established
and is destroyed either when the subagent transport connection
has terminated or when the subagent session is closed.
"
INDEX { agentxConnIndex, agentxSessionIndex }
::= { agentxSessionTable 1 }
AgentxSessionEntry ::= SEQUENCE {
agentxSessionIndex Unsigned32,
agentxSessionObjectID OBJECT IDENTIFIER,
agentxSessionDescr SnmpAdminString,
agentxSessionAdminStatus INTEGER,
agentxSessionOpenTime TimeStamp,
agentxSessionAgentXVer INTEGER,
agentxSessionTimeout INTEGER
}
agentxSessionIndex OBJECT-TYPE
SYNTAX Unsigned32 (0..4294967295)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A unique index for the subagent session. It is the same as
h.sessionID defined in the agentx header. Note that if
a subagent's session with the master agent is closed for
any reason its index should not be re-used.
A value of zero(0) is specifically allowed in order
to be compatible with the definition of h.sessionId.
"
::= { agentxSessionEntry 1 }
agentxSessionObjectID OBJECT-TYPE
SYNTAX OBJECT IDENTIFIER
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This is taken from the o.id field of the agentx-Open-PDU.
This attribute will report a value of '0.0' for subagents
not supporting the notion of an AgentX session object
identifier.
"
::= { agentxSessionEntry 2 }
agentxSessionDescr OBJECT-TYPE
SYNTAX SnmpAdminString
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A textual description of the session. This is analogous to
sysDescr defined in the SNMPv2-MIB in RFC 1907 [19] and is
taken from the o.descr field of the agentx-Open-PDU.
This attribute will report a zero-length string value for
subagents not supporting the notion of a session description.
"
::= { agentxSessionEntry 3 }
agentxSessionAdminStatus OBJECT-TYPE
SYNTAX INTEGER {
up(1),
down(2)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The administrative (desired) status of the session. Setting
the value to 'down(2)' closes the subagent session (with c.reason
set to 'reasonByManager').
"
::= { agentxSessionEntry 4 }
agentxSessionOpenTime OBJECT-TYPE
SYNTAX TimeStamp
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of sysUpTime when this session was opened and,
therefore, its value when this entry was added to the table.
"
::= { agentxSessionEntry 5 }
agentxSessionAgentXVer OBJECT-TYPE
SYNTAX INTEGER (1..255)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The version of the AgentX protocol supported by the
session. This must be less than or equal to the value of
agentxMasterAgentXVer.
"
::= { agentxSessionEntry 6 }
agentxSessionTimeout OBJECT-TYPE
SYNTAX INTEGER (0..255)
UNITS "seconds"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The length of time, in seconds, that a master agent should
allow to elapse after dispatching a message to this session
before it regards the subagent as not responding. This value
is taken from the o.timeout field of the agentx-Open-PDU.
This is a session-specific value that may be overridden by
values associated with the specific registered MIB regions
(see agentxRegTimeout). A value of zero(0) indicates that
the master agent's default timeout value should be used
(see agentxDefaultTimeout).
"
::= { agentxSessionEntry 7 }Last chunk for this part: the registration group 💅 This one tracks which regions each session has registered, plus the priority, timeout, and range info for every region.
-- The AgentX Registration Group
agentxRegistrationTableLastChange OBJECT-TYPE
SYNTAX TimeStamp
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of sysUpTime when the last row creation or deletion
occurred in the agentxRegistrationTable.
"
::= { agentxRegistration 1 }
agentxRegistrationTable OBJECT-TYPE
SYNTAX SEQUENCE OF AgentxRegistrationEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of registered regions.
"
::= { agentxRegistration 2 }
agentxRegistrationEntry OBJECT-TYPE
SYNTAX AgentxRegistrationEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Contains information for a single registered region. An
entry is created when a session successfully registers a
region and is destroyed for any of three reasons: this region
is unregistered by the session, the session is closed,
or the subagent connection is closed.
"
INDEX { agentxConnIndex, agentxSessionIndex, agentxRegIndex }
::= { agentxRegistrationTable 1 }
AgentxRegistrationEntry ::= SEQUENCE {
agentxRegIndex Unsigned32,
agentxRegContext OCTET STRING,
agentxRegStart OBJECT IDENTIFIER,
agentxRegRangeSubId Unsigned32,
agentxRegUpperBound Unsigned32,
agentxRegPriority Unsigned32,
agentxRegTimeout INTEGER,
agentxRegInstance TruthValue }
agentxRegIndex OBJECT-TYPE
SYNTAX Unsigned32 (1..4294967295)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"agentxRegIndex uniquely identifies a registration entry.
This value is constant for the lifetime of an entry.
"
::= { agentxRegistrationEntry 1 }
agentxRegContext OBJECT-TYPE
SYNTAX OCTET STRING
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The context in which the session supports the objects in this
region. A zero-length context indicates the default context.
"
::= { agentxRegistrationEntry 2 }
agentxRegStart OBJECT-TYPE
SYNTAX OBJECT IDENTIFIER
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The starting OBJECT IDENTIFIER of this registration entry. The
session identified by agentxSessionIndex implements objects
starting at this value (inclusive). Note that this value could
identify an object type, an object instance, or a partial object
instance.
"
::= { agentxRegistrationEntry 3 }
agentxRegRangeSubId OBJECT-TYPE
SYNTAX Unsigned32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"agentxRegRangeSubId is used to specify the range. This is
taken from r.region_subid in the registration PDU. If the value
of this object is zero, no range is specified. If it is non-zero,
it identifies the `nth' sub-identifier in r.region for which
this entry's agentxRegUpperBound value is substituted in the
OID for purposes of defining the region's upper bound.
"
::= { agentxRegistrationEntry 4 }
agentxRegUpperBound OBJECT-TYPE
SYNTAX Unsigned32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"agentxRegUpperBound represents the upper-bound sub-identifier in
a registration. This is taken from the r.upper_bound in the
registration PDU. If agentxRegRangeSubid (r.region_subid) is
zero, this value is also zero and is not used to define an upper
bound for this registration.
"
::= { agentxRegistrationEntry 5 }
agentxRegPriority OBJECT-TYPE
SYNTAX Unsigned32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The registration priority. Lower values have higher priority.
This value is taken from r.priority in the register PDU.
Sessions should use the value of 127 for r.priority if a
default value is desired.
"
::= { agentxRegistrationEntry 6 }
agentxRegTimeout OBJECT-TYPE
SYNTAX INTEGER (0..255)
UNITS "seconds"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The timeout value, in seconds, for responses to
requests associated with this registered MIB region.
A value of zero(0) indicates the default value (indicated
by by agentxSessionTimeout or agentxDefaultTimeout) is to
be used. This value is taken from the r.timeout field of
the agentx-Register-PDU.
"
::= { agentxRegistrationEntry 7 }
agentxRegInstance OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of agentxRegInstance is `true' for
registrations for which the INSTANCE_REGISTRATION
was set, and is `false' for all other registrations.
"
::= { agentxRegistrationEntry 8 }Now the conformance bits 🧚 This is where the MIB says which groups and compliance statements belong to AgentX, and what an agent is allowed to do with the session admin status.
-- Conformance Statements for AgentX
agentxConformance OBJECT IDENTIFIER ::= { agentxMIB 2 }
agentxMIBGroups OBJECT IDENTIFIER ::= { agentxConformance 1 }
agentxMIBCompliances OBJECT IDENTIFIER ::= { agentxConformance 2 }
-- Compliance Statements for AgentX
agentxMIBCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"The compliance statement for SNMP entities that implement the
AgentX protocol. Note that a compliant agent can implement all
objects in this MIB module as read-only.
"
MODULE -- this module
MANDATORY-GROUPS { agentxMIBGroup }
OBJECT agentxSessionAdminStatus
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required.
"
::= { agentxMIBCompliances 1 } agentxMIBGroup OBJECT-GROUP
OBJECTS {
agentxDefaultTimeout,
agentxMasterAgentXVer,
agentxConnTableLastChange,
agentxConnOpenTime,
agentxConnTransportDomain,
agentxConnTransportAddress,
agentxSessionTableLastChange,
agentxSessionTimeout,
agentxSessionObjectID,
agentxSessionDescr,
agentxSessionAdminStatus,
agentxSessionOpenTime,
agentxSessionAgentXVer,
agentxRegistrationTableLastChange,
agentxRegContext,
agentxRegStart,
agentxRegRangeSubId,
agentxRegUpperBound,
agentxRegPriority,
agentxRegTimeout,
agentxRegInstance
}
STATUS current
DESCRIPTION
"All accessible objects in the AgentX MIB.
"
::= { agentxMIBGroups 1 }
ENDokay so this is the big group bundle 💅 It's basically the list of every accessible object in the AgentX MIB, all lumped together under agentxMIBGroups 1. The status is current, so it's the live, up-to-date version 🎀✨
And that's the end of the MIB module, bestie 🧚
5. Intellectual Property 🦋
okay so the IETF is not taking a side on whether any intellectual property or other rights might apply to building or using the tech in this doc 🙈 It also doesn't claim it went hunting for those rights. If you want the IETF's rules on rights for standards-track and standards-related stuff, check BCP-11. Any claims of rights that were made available for publication, plus any licence assurances, or the results of trying to get a general licence or permission for implementers or users, can be requested from the IETF Secretariat 📬
The IETF also invites anyone to flag any copyrights, patents, patent applications, or other proprietary rights that might cover tech needed to practise this standard 🌸 Send that info to the IETF Executive Director, periodt 💖
6. Acknowledgements 🫶
This doc is the result of the hard work of the IETF AgentX Working Group (WG) 👑
This MIB is an evolution of the Subagent MIB by Bert Wijnen (wijnen@vnet.ibm.com), which was itself derived from the SMUX-MIB by Marshall Rose [18]. Iconic lineage, honestly 🌈
Huge thanks to these AgentX WG members:
Mike Daniele (Compaq Computer Corporation)
Dale Francisco (Cisco Systems)
Bob Natale (ACE*COMM Corporation)
Randy Presuhn (BMC Software, Inc.)
Shawn Routhier (Epilogue)
Mike Thatcher (Independent Consultant)Special shoutout to:
Maria Greene (Xedia)And a special acknowledgement too for the people who joined the 1998 AgentX testing summit (bakeoff) held in Sunnyvale, California 🍓 They were the real MVPs:
Jeff Case (SNMP Research, Inc.)
Mike Daniele (Compaq Computer Corporation)
Mark Ellison (Ellison Software Consulting, Inc.)
Lauren Heintz (BMC Software, Inc.)
Verne Hyde (Independent Consultant)
Bob Natale (ACE*COMM Corporation)
Shawn Routhier (Epilogue)
Mike Thatcher (Independent Consultant)
Bert Wijnen (IBM T. J. Watson Research Center)7. Security Considerations 🔐
okay bestie, this section is serious, so read it closely 💀
There is a single management object defined in this MIB that has a MAX-ACCESS clause of read-write. This object may be considered sensitive or vulnerable in some network environments. Supporting SET operations in a non-secure environment, without proper protection, can have a negative effect on network operations 😭
There is a single managed object in this MIB that may contain sensitive information. That object is agentxSessionAdminStatus. Setting agentxSessionAdminStatus to an inappropriate value can effectively prevent access to management information, or provide access to inappropriate information 🙈
So it is really important to control even GET access to these objects, and possibly to encrypt the values of these objects when they're sent over the network via SNMP. Not every version of SNMP has features for a secure environment, so keep that in mind 🫣
SNMPv1 by itself is not a secure environment 🚨 Even if the network itself is secure (for example, by using IPSec), there is still no control over who on the secure network is allowed to access and GET/SET (read/change/create/delete) the objects in this MIB. Not it 🙅♀️
Implementers are recommended to consider the security features provided by the SNMPv3 framework. Specifically, the use of the User-based Security Model RFC 2574 [12] and the View-based Access Control Model RFC 2575 [15] is recommended 🛡️💜
Last but not least, it is then a customer/user responsibility to make sure the SNMP entity giving access to an instance of this MIB is properly configured. Access to the objects should be given only to those principals (users) who have legitimate rights to GET or SET (change/delete) them 👑
8. References 📚
- [1] Harrington, D., Presuhn, R. and B. Wijnen, "An Architecture for Describing SNMP Management Frameworks", RFC 2571, April 1999.
- [2] Rose, M. and K. McCloghrie, "Structure and Identification of Management Information for TCP/IP-based Internets", STD 16, RFC 1155, May 1990.
- [3] Rose, M. and K. McCloghrie, "Concise MIB Definitions", STD 16, RFC 1212, March 1991.
- [4] Rose, M., "A Convention for Defining Traps for use with the SNMP", RFC 1215, March 1991.
- [5] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M. and S. Waldbusser, "Structure of Management Information Version 2 (SMIv2)", STD 58, RFC 2578, April 1999.
- [6] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M. and S. Waldbusser, "Textual Conventions for SMIv2", STD 58, RFC 2579, April 1999.
- [7] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M. and S. Waldbusser, "Conformance Statements for SMIv2", STD 58, RFC 2580, April 1999.
- [8] Case, J., Fedor, M., Schoffstall, M. and J. Davin, "Simple Network Management Protocol", STD 15, RFC 1157, May 1990.
- [9] Case, J., McCloghrie, K., Rose, M. and S. Waldbusser, "Introduction to Community-based SNMPv2", RFC 1901, January 1996.
- [10] Case, J., McCloghrie, K., Rose, M. and S. Waldbusser, "Transport Mappings for Version 2 of the Simple Network Management Protocol (SNMPv2)", RFC 1906, January 1996.
- [11] Case, J., Harrington D., Presuhn R. and B. Wijnen, "Message Processing and Dispatching for the Simple Network Management Protocol (SNMP)", RFC 2572, April 1999.
- [12] Blumenthal, U. and B. Wijnen, "User-based Security Model (USM) for version 3 of the Simple Network Management Protocol (SNMPv3)", RFC 2574, April 1999.
- [13] Case, J., McCloghrie, K., Rose, M. and S. Waldbusser, "Protocol Operations for Version 2 of the Simple Network Management Protocol (SNMPv2)", RFC 1905, January 1996.
- [14] Levi, D., Meyer, P. and B. Stewart, "SNMP Applications", RFC 2573, April 1999.
- [15] Wijnen, B., Presuhn, R. and K. McCloghrie, "View-based Access Control Model (VACM) for the Simple Network Management Protocol (SNMP)", RFC 2575, April 1999.
- [16] Case, J., Mundy, R., Partain, D. and B. Stewart, "Introduction to Version 3 of the Internet-standard Network Management Framework", RFC 2570, April 1999.
- [17] Daniele, M., Wijnen, B., Ellison, M. and D. Francisco, "Agent Extensibility (AgentX) Protocol, Version 1", RFC 2741, January 2000.
- [18] Rose, M., "SNMP MUX Protocol and MIB", RFC 1227, May 1991.
- [19] Case, J., McCloghrie, K., Rose, M. and S. Waldbusser, "Management Information Base for Version 2 of the Simple Network Management Protocol (SNMPv2)", RFC 1907, January 1996.
9. Authors' and Editor's Addresses 📮
Lauren Heintz
Cisco Systems
1450 North McDowell Blvd.
Petaluma, CA 94954-6515
USA
Phone: +1 707-793-1714
EMail: lheintz@cisco.com
Smitha Gudur
Independent Consultant
EMail: sgudur@hotmail.com
Mark Ellison (WG editor)
Ellison Software Consulting, Inc.
38 Salem Road
Atkinso, NH 03811
USA
Phone: +1 603-362-9270
Email: ellison@world.std.com10. Full Copyright Statement 💖
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Acknowledgement 🎀
Funding for the RFC Editor function is currently provided by the Internet Society. 👑 That's a wrap, bestie 💅✨
📦 where this page comes from
- ietf: rfc2742 2000-01
- 💖 girlified by claude-haiku-5-5 on : a language model's rewrite of the original, under its terms