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Network Working Group                                         N. FreedRequest for Comments: 2248                                    InnosoftObsoletes:1565                                               S. KilleCategory: Standards Track                             ISODE Consortium                                                          January 1998Network Services Monitoring MIBStatus of this Memo   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 Notice   Copyright (C) The Internet Society (1998).  All Rights Reserved.1.  Introduction   A networked application is a realization of some well defined service   on one or more host computers that is accessible via some network,   uses some network for its internal operations, or both.   There are a wide range of networked applications for which it is   appropriate to provide SNMP monitoring of their network usage.  This   includes applications using both TCP/IP and OSI networking.  This   document defines a MIB which contains the elements common to the   monitoring of any network service application.  This information   includes a table of all monitorable network service applications, a   count of the associations (connections) to each application, and   basic information about the parameters and status of each   application-related association.   This MIB may be used on its own for any application, and for most   simple applications this will suffice.  This MIB is also designed to   serve as a building block which can be used in conjunction with   application-specific monitoring and management.  Two examples of this   are MIBs defining additional variables for monitoring a Message   Transfer Agent (MTA) service or a Directory Service Agent (DSA)   service. It is expected that further MIBs of this nature will be   specified.Freed & Kille               Standards Track                     [Page 1]

RFC 2248                  Network Services MIB              January 1998   This MIB does not attempt to provide facilities for management of the   host or hosts the network service application runs on, nor does it   provide facilities for monitoring applications that provide something   other than a network service.  Host resource and general application   monitoring is handled by the Host Resources MIB at present;   development of an additional application MIB is currently underway in   the IETF.2.  Table of Contents1 Introduction ...............................................12 Table of Contents ..........................................23 The SNMPv2 Network Management Framework ....................23.1 Object Definitions .......................................34 Rationale for having a Network Services Monitoring MIB .....34.1 General Relationship to Other MIBs .......................44.2 Restriction of Scope .....................................44.3 Configuration Information ................................45 Application Objects ........................................56 Definitions ................................................57 Changes made sinceRFC 1565 ................................168 Acknowledgements ...........................................169 References .................................................1610 Security Considerations ...................................1711 Author and Chair Addresses ................................1812 Full Copyright Statement ..................................193.  The SNMPv2 Network Management Framework   The SNMPv2 Network Management Framework consists of seven major   components.  They are:   oRFC 1902 [1] which defines the SMI, the mechanisms used for        describing and naming objects for the purpose of management.   oRFC 1903 [2] defines textual conventions for SNMPv2.   oRFC 1904 [3] defines conformance statements for SNMPv2.   oRFC 1905 [4] defines  transport mappings for SNMPv2.   oRFC 1906 [5] defines the protocol operations used for network        access to managed objects.   oRFC 1907 [6] defines the Management Information Base for SNMPv2.   oRFC 1908 [7] specifies coexistance between SNMP and SNMPv2.Freed & Kille               Standards Track                     [Page 2]

RFC 2248                  Network Services MIB              January 1998   The Framework permits new objects to be defined for the purpose of   experimentation and evaluation.3.1.  Object Definitions   Managed objects are accessed via a virtual information store, termed   the Management Information Base or MIB. Objects in the MIB are   defined using the subset of Abstract Syntax Notation One (ASN.1)   defined in the SMI.  In particular, each object type is named by an   OBJECT IDENTIFIER, an administratively assigned name. The object type   together with an object instance serves to uniquely identify a   specific instantiation of the object.  For human convenience, we   often use a textual string, termed the descriptor, to refer to the   object type.4.  Rationale for having a Network Services Monitoring MIB   Much effort has been expended in developing tools to manage lower   layer network facilities.  However, relatively little work has been   done on managing application layer entities.  It is neither efficient   nor reasonable to manage all aspects of application layer entities   using only lower layer information. Moreover, the difficulty of   managing application entities in this way increases dramatically as   application entities become more complex.   This leads to a substantial need to monitor applications which   provide network services, particularly distributed components such as   MTAs and DSAs, by monitoring specific aspects of the application   itself.  Reasons to monitor such components include but are not   limited to measuring load, detecting broken connectivity, isolating   system failures, and locating congestion.   In order to manage network service applications effectively two   requirements must be met:    (1)   It must be possible to monitor a large number of components          (typical for a large organization).    (2)   Application monitoring must be integrated into general network          management.   This specification defines simple read-only access; this is   sufficient to determine up/down status and provide an indication of a   broad class of operational problems.Freed & Kille               Standards Track                     [Page 3]

RFC 2248                  Network Services MIB              January 19984.1.  General Relationship to Other MIBs   This MIB is intended to only provide facilities common to the   monitoring of any network service application.  It does not provide   all the facilities necessary to monitor any specific application.   Each specific type of network service application is expected to have   a MIB of its own that makes use of these common facilities.4.2.  Restriction of Scope   The framework provided here is very minimal; there is a lot more that   could be done. For example:    (1)   General network service application configuration monitoring          and control.    (2)   Detailed examination and modification of individual entries in          service-specific request queues.    (3)   Probing to determine the status of a specific request (e.g.          the location of a mail message with a specific message-id).    (4)   Requesting that certain actions be performed (e.g. forcing an          immediate connection and transfer of pending messages to some          specific system).   All these capabilities are both impressive and useful.  However,   these capabilities would require provisions for strict security   checking.  These capabilities would also mandate a much more complex   design, with many characteristics likely to be fairly   implementation-specific.  As a result such facilities are likely to   be both contentious and difficult to implement.   This document religiously keeps things simple and focuses on the   basic monitoring aspect of managing applications providing network   services.  The goal here is to provide a framework which is simple,   useful, and widely implementable.4.3.  Configuration Information   This MIB attempts to provide information about the operational   aspects of an application. Further information about the actual   configuration of a given application may be kept in other places; the   applDirectoryName or applURL may be used to point to places where   such information is kept.Freed & Kille               Standards Track                     [Page 4]

RFC 2248                  Network Services MIB              January 19985.  Application Objects   This MIB defines a set of general purpose attributes which would be   appropriate for a range of applications that provide network   services.  Both OSI and non-OSI services can be accomodated.   Additional tables defined in extensions to this MIB provide   attributes specific to specific network services.   A table is defined which will have one row for each operational   network service application on the system.  The only static   information held on the application is its name.  All other static   information should be obtained from various directory services.  The   applDirectoryName is an external key, which allows an SNMP MIB entry   to be cleanly related to the X.500 Directory.  In SNMP terms, the   applications are grouped in a table called applTable, which is   indexed by an integer key applIndex.   The type of the application will be determined by one or both of:    (1)   Additional MIB variables specific to the applications.    (2)   An association to the application of a specific protocol.6.  Definitions    NETWORK-SERVICES-MIB DEFINITIONS ::= BEGINIMPORTS    OBJECT-TYPE, Counter32, Gauge32, MODULE-IDENTITY, mib-2      FROM SNMPv2-SMI    DisplayString, TimeStamp, TEXTUAL-CONVENTION      FROM SNMPv2-TC    MODULE-COMPLIANCE, OBJECT-GROUP      FROM SNMPv2-CONF;application MODULE-IDENTITY    LAST-UPDATED "9708170000Z"    ORGANIZATION "IETF Mail and Directory Management Working Group"    CONTACT-INFO      "        Ned Freed       Postal: Innosoft International, Inc.               1050 Lakes Drive               West Covina, CA 91790               US          Tel: +1 626 919 3600          Fax: +1 626 919 3614Freed & Kille               Standards Track                     [Page 5]

RFC 2248                  Network Services MIB              January 1998       E-Mail: ned.freed@innosoft.com"    DESCRIPTION      "The MIB module describing network service applications"    REVISION "9311280000Z"    DESCRIPTION      "The original version of this MIB was published inRFC 1565"    ::= {mib-2 27}-- Textual conventions-- DistinguishedName is used to refer to objects in the-- directory.DistinguishedName ::= TEXTUAL-CONVENTION    STATUS current    DESCRIPTION        "A Distinguished Name represented in accordance withRFC 1779 [8]."    SYNTAX DisplayString-- Uniform Resource Locators are stored in URLStrings.URLString ::= TEXTUAL-CONVENTION    STATUS current    DESCRIPTION        "A Uniform Resource Locator represented in accordance         withRFC 1738 [10]."    SYNTAX DisplayString-- The basic applTable contains a list of the application-- entities.applTable OBJECT-TYPE    SYNTAX SEQUENCE OF ApplEntry    MAX-ACCESS not-accessible    STATUS current    DESCRIPTION        "The table holding objects which apply to all different         kinds of applications providing network services.         Each network service application capable of being         monitored should have a single entry in this table."    ::= {application 1}applEntry OBJECT-TYPE    SYNTAX ApplEntry    MAX-ACCESS not-accessible    STATUS current    DESCRIPTIONFreed & Kille               Standards Track                     [Page 6]

RFC 2248                  Network Services MIB              January 1998      "An entry associated with a single network service       application."    INDEX {applIndex}    ::= {applTable 1}ApplEntry ::= SEQUENCE {    applIndex        INTEGER,    applName        DisplayString,    applDirectoryName        DistinguishedName,    applVersion        DisplayString,    applUptime        TimeStamp,    applOperStatus        INTEGER,    applLastChange        TimeStamp,    applInboundAssociations        Gauge32,    applOutboundAssociations        Gauge32,    applAccumulatedInboundAssociations        Counter32,    applAccumulatedOutboundAssociations        Counter32,    applLastInboundActivity        TimeStamp,    applLastOutboundActivity        TimeStamp,    applRejectedInboundAssociations        Counter32,    applFailedOutboundAssociations        Counter32,    applDescription        DisplayString,    applURL        URLString}applIndex OBJECT-TYPE    SYNTAX INTEGER (1..2147483647)    MAX-ACCESS not-accessible    STATUS current    DESCRIPTION      "An index to uniquely identify the network serviceFreed & Kille               Standards Track                     [Page 7]

RFC 2248                  Network Services MIB              January 1998       application. This attribute is the index used for       lexicographic ordering of the table."    ::= {applEntry 1}applName OBJECT-TYPE    SYNTAX DisplayString    MAX-ACCESS read-only    STATUS current    DESCRIPTION      "The name the network service application chooses to be       known by."    ::= {applEntry 2}applDirectoryName OBJECT-TYPE    SYNTAX DistinguishedName    MAX-ACCESS read-only    STATUS current    DESCRIPTION      "The Distinguished Name of the directory entry where       static information about this application is stored.       An empty string indicates that no information about       the application is available in the directory."    ::= {applEntry 3}applVersion OBJECT-TYPE    SYNTAX DisplayString    MAX-ACCESS read-only    STATUS current    DESCRIPTION      "The version of network service application software.       This field is usually defined by the vendor of the       network service application software."    ::= {applEntry 4}applUptime OBJECT-TYPE    SYNTAX TimeStamp    MAX-ACCESS read-only    STATUS current    DESCRIPTION      "The value of sysUpTime at the time the network service       application was last initialized.  If the application was       last initialized prior to the last initialization of the       network management subsystem, then this object contains       a zero value."    ::= {applEntry 5}Freed & Kille               Standards Track                     [Page 8]

RFC 2248                  Network Services MIB              January 1998applOperStatus OBJECT-TYPE    SYNTAX INTEGER {      up(1),      down(2),      halted(3),      congested(4),      restarting(5),      quiescing(6)    }    MAX-ACCESS read-only    STATUS current    DESCRIPTION      "Indicates the operational status of the network service       application. 'down' indicates that the network service is       not available. 'up' indicates that the network service       is operational and available.  'halted' indicates that the       service is operational but not available.  'congested'       indicates that the service is operational but no additional       inbound associations can be accomodated.  'restarting'       indicates that the service is currently unavailable but is       in the process of restarting and will be available soon.       'quiescing' indicates that service is currently operational       but is in the process of shutting down. Additional inbound       associations may be rejected by applications in the       'quiescing' state."    ::= {applEntry 6}applLastChange OBJECT-TYPE    SYNTAX TimeStamp    MAX-ACCESS read-only    STATUS current    DESCRIPTION      "The value of sysUpTime at the time the network service       application entered its current operational state.  If       the current state was entered prior to the last       initialization of the local network management subsystem,       then this object contains a zero value."    ::= {applEntry 7}applInboundAssociations OBJECT-TYPE    SYNTAX Gauge32    MAX-ACCESS read-only    STATUS current    DESCRIPTION      "The number of current associations to the network service       application, where it is the responder.  An inbound       assocation occurs when a another application successfully       connects to this one."Freed & Kille               Standards Track                     [Page 9]

RFC 2248                  Network Services MIB              January 1998    ::= {applEntry 8}applOutboundAssociations OBJECT-TYPE    SYNTAX Gauge32    MAX-ACCESS read-only    STATUS current    DESCRIPTION      "The number of current associations to the network service       application, where it is the initiator.  An outbound       association occurs when this application successfully       connects to another one."    ::= {applEntry 9}applAccumulatedInboundAssociations OBJECT-TYPE    SYNTAX Counter32    MAX-ACCESS read-only    STATUS current    DESCRIPTION      "The total number of associations to the application entity       since application initialization, where it was the responder."    ::= {applEntry 10}applAccumulatedOutboundAssociations OBJECT-TYPE    SYNTAX Counter32    MAX-ACCESS read-only    STATUS current    DESCRIPTION      "The total number of associations to the application entity       since application initialization, where it was the initiator."    ::= {applEntry 11}applLastInboundActivity OBJECT-TYPE    SYNTAX TimeStamp    MAX-ACCESS read-only    STATUS current    DESCRIPTION      "The value of sysUpTime at the time this application last       had an inbound association.  If the last association       occurred prior to the last initialization of the network       subsystem, then this object contains a zero value."    ::= {applEntry 12}applLastOutboundActivity OBJECT-TYPE    SYNTAX TimeStamp    MAX-ACCESS read-only    STATUS current    DESCRIPTION      "The value of sysUpTime at the time this application lastFreed & Kille               Standards Track                    [Page 10]

RFC 2248                  Network Services MIB              January 1998       had an outbound association.  If the last association       occurred prior to the last initialization of the network       subsystem, then this object contains a zero value."    ::= {applEntry 13}applRejectedInboundAssociations OBJECT-TYPE    SYNTAX Counter32    MAX-ACCESS read-only    STATUS current    DESCRIPTION      "The total number of inbound associations the application       entity has rejected, since application initialization.       Rejected associations are not counted in the accumulated       association totals.  Note that this only counts       associations the application entity has rejected itself;       it does not count rejections that occur at lower layers       of the network.  Thus, this counter may not reflect the       true number of failed inbound associations."    ::= {applEntry 14}applFailedOutboundAssociations OBJECT-TYPE    SYNTAX Counter32    MAX-ACCESS read-only    STATUS current    DESCRIPTION      "The total number associations where the application entity       is initiator and association establishment has failed,       since application initialization.  Failed associations are       not counted in the accumulated association totals."    ::= {applEntry 15}applDescription OBJECT-TYPE    SYNTAX DisplayString    MAX-ACCESS read-only    STATUS current    DESCRIPTION      "A text description of the application.  This information       is intended to identify and briefly describe the       application in a status display."    ::= {applEntry 16}applURL OBJECT-TYPE    SYNTAX URLString    MAX-ACCESS read-only    STATUS current    DESCRIPTION      "A URL pointing to a description of the application.       This information is intended to identify and describeFreed & Kille               Standards Track                    [Page 11]

RFC 2248                  Network Services MIB              January 1998       the application in a status display."    ::= {applEntry 17}-- The assocTable augments the information in the applTable-- with information about associations.  Note that two levels-- of compliance are specified below, depending on whether-- association monitoring is mandated.assocTable OBJECT-TYPE    SYNTAX SEQUENCE OF AssocEntry    MAX-ACCESS not-accessible    STATUS current    DESCRIPTION        "The table holding a set of all active application         associations."    ::= {application 2}assocEntry OBJECT-TYPE    SYNTAX AssocEntry    MAX-ACCESS not-accessible    STATUS current    DESCRIPTION      "An entry associated with an association for a network       service application."    INDEX {applIndex, assocIndex}    ::= {assocTable 1}AssocEntry ::= SEQUENCE {    assocIndex        INTEGER,    assocRemoteApplication        DisplayString,    assocApplicationProtocol        OBJECT IDENTIFIER,    assocApplicationType        INTEGER,    assocDuration        TimeStamp}assocIndex OBJECT-TYPE    SYNTAX INTEGER (1..2147483647)    MAX-ACCESS not-accessible    STATUS current    DESCRIPTION      "An index to uniquely identify each association for a network       service application.  This attribute is the index that isFreed & Kille               Standards Track                    [Page 12]

RFC 2248                  Network Services MIB              January 1998       used for lexicographic ordering of the table.  Note that the       table is also indexed by the applIndex."    ::= {assocEntry 1}assocRemoteApplication OBJECT-TYPE    SYNTAX DisplayString    MAX-ACCESS read-only    STATUS current    DESCRIPTION      "The name of the system running remote network service       application.  For an IP-based application this should be       either a domain name or IP address.  For an OSI application       it should be the string encoded distinguished name of the       managed object.  For X.400(1984) MTAs which do not have a       Distinguished Name, theRFC 1327 [9] syntax       'mta in globalid' should be used. Note, however, that not       all connections an MTA are necessarily to another MTA."    ::= {assocEntry 2}assocApplicationProtocol OBJECT-TYPE    SYNTAX OBJECT IDENTIFIER    MAX-ACCESS read-only    STATUS current    DESCRIPTION      "An identification of the protocol being used for the       application.  For an OSI Application, this will be the       Application Context.  For Internet applications, the IANA       maintains a registry of the OIDs which correspond to       well-known applications.  If the application protocol is       not listed in the registry, an OID value of the form       {applTCPProtoID port} or {applUDProtoID port} are used for       TCP-based and UDP-based protocols, respectively. In either       case 'port' corresponds to the primary port number being       used by the protocol."    ::= {assocEntry 3}assocApplicationType OBJECT-TYPE    SYNTAX INTEGER {        ua-initiator(1),        ua-responder(2),        peer-initiator(3),        peer-responder(4)}    MAX-ACCESS read-only    STATUS current    DESCRIPTION      "This indicates whether the remote application is some type of       client making use of this network service (e.g. a Mail User       Agent) or a server acting as a peer. Also indicated is whetherFreed & Kille               Standards Track                    [Page 13]

RFC 2248                  Network Services MIB              January 1998       the remote end initiated an incoming connection to the network       service or responded to an outgoing connection made by the       local application.  MTAs and messaging gateways are       considered to be peers for the purposes of this variable."    ::= {assocEntry 4}assocDuration OBJECT-TYPE    SYNTAX TimeStamp    MAX-ACCESS read-only    STATUS current    DESCRIPTION      "The value of sysUpTime at the time this association was       started.  If this association started prior to the last       initialization of the network subsystem, then this       object contains a zero value."    ::= {assocEntry 5}-- Conformance informationapplConformance OBJECT IDENTIFIER ::= {application 3}applGroups      OBJECT IDENTIFIER ::= {applConformance 1}applCompliances OBJECT IDENTIFIER ::= {applConformance 2}-- Compliance statementsapplCompliance MODULE-COMPLIANCE    STATUS current    DESCRIPTION      "The compliance statement for SNMPv2 entities       which implement the Network Services Monitoring MIB       for basic monitoring of network service applications."    MODULE  -- this module      MANDATORY-GROUPS {applGroup}    ::= {applCompliances 1}assocCompliance MODULE-COMPLIANCE    STATUS current    DESCRIPTION      "The compliance statement for SNMPv2 entities which       implement the Network Services Monitoring MIB for basic       monitoring of network service applications and their       associations."    MODULE  -- this module      MANDATORY-GROUPS {applGroup, assocGroup}    ::= {applCompliances 2}Freed & Kille               Standards Track                    [Page 14]

RFC 2248                  Network Services MIB              January 1998-- Units of conformanceapplGroup OBJECT-GROUP    OBJECTS {      applName, applVersion, applUptime, applOperStatus,      applLastChange, applInboundAssociations,      applOutboundAssociations, applAccumulatedInboundAssociations,      applAccumulatedOutboundAssociations, applLastInboundActivity,      applLastOutboundActivity, applRejectedInboundAssociations,      applFailedOutboundAssociations, applDescription, applURL}    STATUS current    DESCRIPTION      "A collection of objects providing basic monitoring of       network service applications."    ::= {applGroups 1}assocGroup OBJECT-GROUP    OBJECTS {      assocRemoteApplication, assocApplicationProtocol,      assocApplicationType, assocDuration}    STATUS current    DESCRIPTION      "A collection of objects providing basic monitoring of       network service applications' associations."    ::= {applGroups 2}-- OIDs of the form {applTCPProtoID port} are intended to be used-- for TCP-based protocols that don't have OIDs assigned by other-- means. {applUDPProtoID port} serves the same purpose for-- UDP-based protocols. In either case 'port' corresponds to-- the primary port number being used by the protocol. For example,-- assuming no other OID is assigned for SMTP, an OID of-- {applTCPProtoID 25} could be used, since SMTP is a TCP-based-- protocol that uses port 25 as its primary port.applTCPProtoID OBJECT IDENTIFIER ::= {application 4}applUDPProtoID OBJECT IDENTIFIER ::= {application 5}ENDFreed & Kille               Standards Track                    [Page 15]

RFC 2248                  Network Services MIB              January 19987.  Changes made sinceRFC 1565   The only changes made to this document since it was issued asRFC1565 [11] are the following:    (1)   applDescription and applURL fields have been added.  These          fields are intended to identify and describe the application.    (2)   A number of DESCRIPTION fields have been reworded, hopefully          making them clearer.    (3)   The new "quiescing" state has been added to applOperStatus.    (4)   The prose about "dynamic single threaded processes" has been          removed -- it was simply too confusing.    (5)   Various RFC references have been updated to refer to more          recent versions.    (6)   The MIB has been renamed from APPLICATION-MIB to NETWORK-          SERVICES-MIB.  This was done because an application MIB is now          under development within the IETF that provides very different          functionality from this MIB.8.  Acknowledgements   This document is a product of the Mail and Directory Management   (MADMAN) Working Group. It is based on an earlier MIB designed by S.   Kille, T.  Lenggenhager, D. Partain, and W. Yeong.  The Electronic   Mail Association's TSC committee was instrumental in  providing   feedback on and suggesting enhancements toRFC 1565 [11] that have   led to the present document.9.  References   [1]  SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M., and        S. Waldbusser, "Structure of Management Information for Version        2 of the Simple Network Management Protocol (SNMPv2)",RFC 1902,        January 1996.   [2]  SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M., and        S. Waldbusser, "Textual Conventions for Version 2 of the Simple        Network Management Protocol (SNMPv2)",RFC 1903, January 1996.   [3]  SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M., and        S. Waldbusser, "Conformance Statements for Version 2 of the        Simple Network Management Protocol (SNMPv2)",RFC 1904, January        1996.Freed & Kille               Standards Track                    [Page 16]

RFC 2248                  Network Services MIB              January 1998   [4]  SNMPv2 Working Group, 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.   [5]  SNMPv2 Working Group, 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.   [6]  SNMPv2 Working Group, 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.   [7]  SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M., and        S. Waldbusser, "Coexistence between Version 1 and Version 2 of        the Internet-standard Network Management Framework",RFC 1908,        January 1996.   [8]  Kille, S., "A String Representation of Distinguished Names",RFC1779, March 1995.   [9]  Kille, S., "Mapping between X.400(1988) / ISO 10021 andRFC822",RFC 1327, May 1992.   [10] Berners-Lee, T., Masinter, L. and M. McCahill, Uniform Resource        Locators (URL)",RFC 1738, December 1994.   [11] Freed, N., and S. Kille, "Network Services Monitoring MIB",RFC1565, January 1994.10.  Security Considerations   This MIB does not offer write access, and as such cannot be used to   actively attack a system. However, this MIB does provide passive   information about the existance, type, and configuration of   applications on a given host that could potentially indicate some   sort of vulnerability. Finally, the information MIB provides about   network usage could be used to analyze network traffic patterns.Freed & Kille               Standards Track                    [Page 17]

RFC 2248                  Network Services MIB              January 199811.  Author and Chair Addresses   Ned Freed   Innosoft International, Inc.   1050 Lakes Drive   West Covina, CA 91790   USA   Phone: +1 626 919 3600   Fax: +1 626 919 3614   EMail: ned.freed@innosoft.com   Steve Kille, MADMAN WG Chair   ISODE Consortium   The Dome, The Square   Richmond TW9 1DT   UK   Phone: +44 181 332 9091   EMail: S.Kille@isode.comFreed & Kille               Standards Track                    [Page 18]

RFC 2248                  Network Services MIB              January 199812.  Full Copyright Statement   Copyright (C) The Internet Society (1998). All Rights Reserved.   This document and translations of it may be copied and furnished  to   others, and derivative works that comment on or otherwise  explain it   or assist in its implementation may be prepared, copied,  published   and distributed, in whole or in part, without  restriction of any   kind, provided that the above copyright notice  and this paragraph   are included on all such copies and derivative  works.  However, this   document itself may not be modified in any  way, such as by removing   the copyright notice or references to the  Internet Society or other   Internet organizations, except as needed for the purpose of   developing Internet standards in which case the  procedures for   copyrights defined in the Internet Standards  process must be   followed, or as required to translate it into languages other than   English.   The limited permissions granted above are perpetual and will not be   revoked by the Internet Society or its successors or assigns.   This document and the information contained herein is provided on  an   "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET  ENGINEERING   TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR  IMPLIED, INCLUDING   BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF  THE INFORMATION   HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.Freed & Kille               Standards Track                    [Page 19]

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