Network Working Group S. Perreault Internet-Draft Viagenie Obsoletes: 4008 (if approved) T. Tsou Intended status: Standards Track Huawei Technologies (USA) Expires: August 25, 2013 S. Sivakumar Cisco Systems February 21, 2013 Additional Managed Objects for Network Address Translators (NAT) draft-ietf-behave-nat-mib-04 Abstract This memo defines a portion of the Management Information Base (MIB) for devices implementing Network Address Translator (NAT) function. This MIB module may be used for monitoring of a device capable of NAT function. Status of this Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at http://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." This Internet-Draft will expire on August 25, 2013. Copyright Notice Copyright (c) 2013 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of Perreault, et al. Expires August 25, 2013 [Page 1] Internet-Draft NEW NAT MIB February 2013 the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. The Internet-Standard Management Framework . . . . . . . . . . 3 3. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3.1. Deprecated Features . . . . . . . . . . . . . . . . . . . 3 3.2. New Features . . . . . . . . . . . . . . . . . . . . . . . 4 3.3. Realms . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4. Definitions . . . . . . . . . . . . . . . . . . . . . . . . . 6 5. Security Considerations . . . . . . . . . . . . . . . . . . . 78 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 79 7. References . . . . . . . . . . . . . . . . . . . . . . . . . . 79 7.1. Normative References . . . . . . . . . . . . . . . . . . . 79 7.2. Informative References . . . . . . . . . . . . . . . . . . 80 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 80 Perreault, et al. Expires August 25, 2013 [Page 2] Internet-Draft NEW NAT MIB February 2013 1. Introduction This memo defines a portion of the Management Information Base (MIB) for devices implementing NAT function. This MIB module may be used for monitoring of a device capable of NAT function. Using it for configuration is deprecated. NAT types and their characteristics are defined in [RFC2663]. Traditional NAT function, in particular is defined in [RFC3022]. This MIB does not address the firewall functions and must not be used for configuring or monitoring these. Section 2 provides references to the SNMP management framework, which was used as the basis for the MIB module definition. Section 3 provides an overview of the MIB features. Lastly, Section 4 has the complete NAT MIB definition. 2. The Internet-Standard Management Framework For a detailed overview of the documents that describe the current Internet-Standard Management Framework, please refer to section 7 of [RFC3410]. Managed objects are accessed via a virtual information store, termed the Management Information Base or MIB. MIB objects are generally accessed through the Simple Network Management Protocol (SNMP). Objects in the MIB are defined using the mechanisms defined in the Structure of Management Information (SMI). This memo specifies a MIB module that is compliant to the SMIv2, which is described in [RFC2578], [RFC2579] and [RFC2580]. 3. Overview 3.1. Deprecated Features All objects defined in [RFC4008] have been marked with "STATUS deprecated" for the following reasons: Writability: Experience with NAT has shown that implementations vary tremendously. The NAT algorithms and data structures have little in common across devices, and this results in wildly incompatible configuration parameters. Therefore, few implementations were ever able to claim full compliance. Lesson learned: the MIB should be read-only as much as possible. Perreault, et al. Expires August 25, 2013 [Page 3] Internet-Draft NEW NAT MIB February 2013 Exposing configuration parameters: Even in read-only mode, many configuration parameters were exposed by [RFC4008] (e.g. timeouts). Since implementations vary wildly in their sets of configuration parameters, few implementations could claim even basic compliance. Lesson learned: the NAT MIB's purpose is not to expose configuration parameters. Interfaces: Objects from [RFC4008] tie NAT state with interfaces (e.g. the interface table, the way map entries are grouped by interface). Many NAT implementations either never keep track of the interface or associate a mapping to a set of interfaces. Since interfaces are at the core of [RFC4008], many NAT devices were unable to have a proper implementation. Lesson learned: NAT is a logical function that may be independent of interfaces. Do not tie NAT state with interfaces. NAT service types: [RFC4008] used four categories of NAT service: basicNat, napt, bidirectionalNat, twiceNat. These are ill-defined and many implementations either use different categories or do not use categories at all. Lesson learned: do not try to categorize NAT types. Limited transport protocol set: The set of transport protocols was defined as: other, icmp, udp, tcp. Furthermore, the numeric values corresponding to those labels were arbitrary, without relation to the actual standard protocol numbers. This meant that NAT implementations were limited to those protocols and were unable to expose information about DCCP, SCTP, etc. Lesson learned: use standard transport protocol numbers. 3.2. New Features New features in this module are as follows: Counters: Many new counters are introduced. Most of them are available in two variants: global and per-transport protocol. Limits: A few limits on the quantity of state data stored by the NAT device. Some of them can trigger notifications. Perreault, et al. Expires August 25, 2013 [Page 4] Internet-Draft NEW NAT MIB February 2013 Address+Port Pools: Pools of external addresses and ports are often used in enterprise and ISP settings. Pools are listed in a table, each with its range of addresses and ports. It is possible to inspect each pool's usage, to set limits, and to receive notifications when thresholds are crossed. Address Mappings: NATs that have an "IP address pooling" behavior of "Paired" [RFC4787] maintain a mapping from internal address to external address. This module allows inspection of this mapping table. Mapping table indexed by external 3-tuple: It is often necessary to determine the internal address that is mapped to a given external address and port. This MIB provides this table with an index to accomplish this efficiently, without having to iterate over all mappings. Realms: See Section 3.3. RFC 4787 terminology: Mapping table entries indicate the mapping behavior, the filtering behavior, and the address pooling behavior that were used to create the mapping. Subscriber awareness: With the advent of CGN deployment, a set of subscriber specific counters, limits and parameters are added. 3.3. Realms Current NAT devices commonly allow the internal and external parts of a mapping to come from different realms. The meaning of "realm" is implementation-dependent. On some implementations it can be equivalent to the name of a VPN Routing and Forwarding table (VRF). On others it is simply the numeric index of a virtual routing table. Note that this usage of "realm" is completely different from the one in [RFC4008]. This MIB allows the realm to be indicated where it makes sense. The format is an SnmpAdminString. On platforms that identify realms with integers, the string representation of the integer is used instead. The empty string has special meaning: it refers to the default realm. Note that many MIBs implicitly support realms in one form or another by using SNMPv3 contexts. See for example the OSPFv2 MIB [RFC4750]. This method cannot be used for the NAT MIB because mapppings can belong to two realms simultaneously: the internal part can be in one realm while the external part is in another. In such cases the NAT function acts like a "wormhole" between two realms. Using contexts would implicitly impose the restriction that all objects would have Perreault, et al. Expires August 25, 2013 [Page 5] Internet-Draft NEW NAT MIB February 2013 to belong to the same realm. 4. Definitions This MIB module IMPORTs objects from [RFC2578], [RFC2579], and [RFC4001]. NAT-MIB DEFINITIONS ::= BEGIN IMPORTS MODULE-IDENTITY, OBJECT-TYPE, Integer32, Unsigned32, Gauge32, Counter64, TimeTicks, mib-2, NOTIFICATION-TYPE FROM SNMPv2-SMI TEXTUAL-CONVENTION, StorageType, RowStatus FROM SNMPv2-TC MODULE-COMPLIANCE, NOTIFICATION-GROUP, OBJECT-GROUP FROM SNMPv2-CONF ifIndex, ifCounterDiscontinuityGroup FROM IF-MIB SnmpAdminString FROM SNMP-FRAMEWORK-MIB InetAddressType, InetAddress, InetPortNumber FROM INET-ADDRESS-MIB; natMIB MODULE-IDENTITY LAST-UPDATED "200001010000Z" ORGANIZATION "TBD" CONTACT-INFO "TBD" DESCRIPTION "This MIB module defines the generic managed objects for NAT." REVISION "200503210000Z" -- 21th March 2005 DESCRIPTION Perreault, et al. Expires August 25, 2013 [Page 6] Internet-Draft NEW NAT MIB February 2013 "Initial version, published as RFC 4008." REVISION "200001010000Z" DESCRIPTION "Dummy version. RFC Editor must replace this." ::= { mib-2 123 } natMIBObjects OBJECT IDENTIFIER ::= { natMIB 1 } NatProtocolType ::= TEXTUAL-CONVENTION STATUS deprecated DESCRIPTION "A list of protocols that support the network address translation. Inclusion of the values is not intended to imply that those protocols need to be supported. Any change in this TEXTUAL-CONVENTION should also be reflected in the definition of NatProtocolMap, which is a BITS representation of this." SYNTAX INTEGER { none (1), -- not specified other (2), -- none of the following icmp (3), udp (4), tcp (5) } NatProtocolMap ::= TEXTUAL-CONVENTION STATUS deprecated DESCRIPTION "A bitmap of protocol identifiers that support the network address translation. Any change in this TEXTUAL-CONVENTION should also be reflected in the definition of NatProtocolType." SYNTAX BITS { other (0), icmp (1), udp (2), tcp (3) } NatAddrMapId ::= TEXTUAL-CONVENTION DISPLAY-HINT "d" STATUS deprecated DESCRIPTION "A unique id that is assigned to each address map by a NAT enabled device." SYNTAX Unsigned32 (1..4294967295) Perreault, et al. Expires August 25, 2013 [Page 7] Internet-Draft NEW NAT MIB February 2013 NatBindIdOrZero ::= TEXTUAL-CONVENTION DISPLAY-HINT "d" STATUS deprecated DESCRIPTION "A unique id that is assigned to each bind by a NAT enabled device. The bind id will be zero in the case of a Symmetric NAT." SYNTAX Unsigned32 (0..4294967295) NatBindId ::= TEXTUAL-CONVENTION DISPLAY-HINT "d" STATUS deprecated DESCRIPTION "A unique id that is assigned to each bind by a NAT enabled device." SYNTAX Unsigned32 (1..4294967295) NatSessionId ::= TEXTUAL-CONVENTION DISPLAY-HINT "d" STATUS deprecated DESCRIPTION "A unique id that is assigned to each session by a NAT enabled device." SYNTAX Unsigned32 (1..4294967295) NatBindMode ::= TEXTUAL-CONVENTION STATUS deprecated DESCRIPTION "An indication of whether the bind is an address bind or an address port bind." SYNTAX INTEGER { addressBind (1), addressPortBind (2) } NatAssociationType ::= TEXTUAL-CONVENTION STATUS deprecated DESCRIPTION "An indication of whether the association is static or dynamic." SYNTAX INTEGER { static (1), dynamic (2) } NatTranslationEntity ::= TEXTUAL-CONVENTION STATUS deprecated DESCRIPTION Perreault, et al. Expires August 25, 2013 [Page 8] Internet-Draft NEW NAT MIB February 2013 "An indication of a) the direction of a session for which an address map entry, address bind or port bind is applicable, and b) the entity (source or destination) within the session that is subject to translation." SYNTAX BITS { inboundSrcEndPoint (0), outboundDstEndPoint(1), inboundDstEndPoint (2), outboundSrcEndPoint(3) } ProtocolNumber ::= TEXTUAL-CONVENTION DISPLAY-HINT "d" STATUS current DESCRIPTION "A transport protocol number, from the 'protocol-numbers' IANA registry." SYNTAX Unsigned32 (0..255) NatPoolId ::= TEXTUAL-CONVENTION DISPLAY-HINT "d" STATUS current DESCRIPTION "A unique ID that is assigned to each pool." SYNTAX Unsigned32 (1..4294967295) NatBehaviorType ::= TEXTUAL-CONVENTION STATUS current DESCRIPTION "Behavior type as described in [RFC4787] sections 4.1 and 5." SYNTAX INTEGER { endpointIndependent (0), addressDependent (1), addressAndPortDependent (2) } NatPoolingType ::= TEXTUAL-CONVENTION STATUS current DESCRIPTION "Pooling type as described in [RFC4787] sections 4.1." SYNTAX INTEGER { arbitrary (0), paired (1) } -- Perreault, et al. Expires August 25, 2013 [Page 9] Internet-Draft NEW NAT MIB February 2013 -- Default Values for the Bind and NAT Protocol Timers -- natDefTimeouts OBJECT IDENTIFIER ::= { natMIBObjects 1 } natNotifCtrl OBJECT IDENTIFIER ::= { natMIBObjects 2 } -- -- Address Bind and Port Bind related NAT configuration -- natBindDefIdleTimeout OBJECT-TYPE SYNTAX Unsigned32 (0..4294967295) UNITS "seconds" MAX-ACCESS read-write STATUS deprecated DESCRIPTION "The default Bind (Address Bind or Port Bind) idle timeout parameter. If the agent is capable of storing non-volatile configuration, then the value of this object must be restored after a re-initialization of the management system." DEFVAL { 0 } ::= { natDefTimeouts 1 } -- -- UDP related NAT configuration -- natUdpDefIdleTimeout OBJECT-TYPE SYNTAX Unsigned32 (1..4294967295) UNITS "seconds" MAX-ACCESS read-write STATUS deprecated DESCRIPTION "The default UDP idle timeout parameter. If the agent is capable of storing non-volatile configuration, then the value of this object must be restored after a re-initialization of the management system." DEFVAL { 300 } ::= { natDefTimeouts 2 } -- -- ICMP related NAT configuration Perreault, et al. Expires August 25, 2013 [Page 10] Internet-Draft NEW NAT MIB February 2013 -- natIcmpDefIdleTimeout OBJECT-TYPE SYNTAX Unsigned32 (1..4294967295) UNITS "seconds" MAX-ACCESS read-write STATUS deprecated DESCRIPTION "The default ICMP idle timeout parameter. If the agent is capable of storing non-volatile configuration, then the value of this object must be restored after a re-initialization of the management system." DEFVAL { 300 } ::= { natDefTimeouts 3 } -- -- Other protocol parameters -- natOtherDefIdleTimeout OBJECT-TYPE SYNTAX Unsigned32 (1..4294967295) UNITS "seconds" MAX-ACCESS read-write STATUS deprecated DESCRIPTION "The default idle timeout parameter for protocols represented by the value other (2) in NatProtocolType. If the agent is capable of storing non-volatile configuration, then the value of this object must be restored after a re-initialization of the management system." DEFVAL { 60 } ::= { natDefTimeouts 4 } -- -- TCP related NAT Timers -- natTcpDefIdleTimeout OBJECT-TYPE SYNTAX Unsigned32 (1..4294967295) UNITS "seconds" MAX-ACCESS read-write STATUS deprecated DESCRIPTION Perreault, et al. Expires August 25, 2013 [Page 11] Internet-Draft NEW NAT MIB February 2013 "The default time interval that a NAT session for an established TCP connection is allowed to remain valid without any activity on the TCP connection. If the agent is capable of storing non-volatile configuration, then the value of this object must be restored after a re-initialization of the management system." DEFVAL { 86400 } ::= { natDefTimeouts 5 } natTcpDefNegTimeout OBJECT-TYPE SYNTAX Unsigned32 (1..4294967295) UNITS "seconds" MAX-ACCESS read-write STATUS deprecated DESCRIPTION "The default time interval that a NAT session for a TCP connection that is not in the established state is allowed to remain valid without any activity on the TCP connection. If the agent is capable of storing non-volatile configuration, then the value of this object must be restored after a re-initialization of the management system." DEFVAL { 60 } ::= { natDefTimeouts 6 } natNotifThrottlingInterval OBJECT-TYPE SYNTAX Integer32 (0 | 5..3600) UNITS "seconds" MAX-ACCESS read-write STATUS deprecated DESCRIPTION "This object controls the generation of the natPacketDiscard notification. If this object has a value of zero, then no natPacketDiscard notifications will be transmitted by the agent. If this object has a non-zero value, then the agent must not generate more than one natPacketDiscard 'notification-event' in the indicated period, where a 'notification-event' is the generation of a single notification PDU type to a list of notification destinations. If additional NAT packets are discarded Perreault, et al. Expires August 25, 2013 [Page 12] Internet-Draft NEW NAT MIB February 2013 within the throttling period, then notification-events for these changes must be suppressed by the agent until the current throttling period expires. If natNotifThrottlingInterval notification generation is enabled, the suggested default throttling period is 60 seconds, but generation of the natPacketDiscard notification should be disabled by default. If the agent is capable of storing non-volatile configuration, then the value of this object must be restored after a re-initialization of the management system. The actual transmission of notifications is controlled via the MIB modules in RFC 3413." DEFVAL { 0 } ::= { natNotifCtrl 1 } -- -- The NAT Interface Table -- natInterfaceTable OBJECT-TYPE SYNTAX SEQUENCE OF NatInterfaceEntry MAX-ACCESS not-accessible STATUS deprecated DESCRIPTION "This table specifies the attributes for interfaces on a device supporting NAT function." ::= { natMIBObjects 3 } natInterfaceEntry OBJECT-TYPE SYNTAX NatInterfaceEntry MAX-ACCESS not-accessible STATUS deprecated DESCRIPTION "Each entry in the natInterfaceTable holds a set of parameters for an interface, instantiated by ifIndex. Therefore, the interface index must have been assigned, according to the applicable procedures, before it can be meaningfully used. Generally, this means that the interface must exist. When natStorageType is of type nonVolatile, however, this may reflect the configuration for an interface whose ifIndex has been assigned but for which the supporting Perreault, et al. Expires August 25, 2013 [Page 13] Internet-Draft NEW NAT MIB February 2013 implementation is not currently present." INDEX { ifIndex } ::= { natInterfaceTable 1 } NatInterfaceEntry ::= SEQUENCE { natInterfaceRealm INTEGER, natInterfaceServiceType BITS, natInterfaceInTranslates Counter64, natInterfaceOutTranslates Counter64, natInterfaceDiscards Counter64, natInterfaceStorageType StorageType, natInterfaceRowStatus RowStatus } natInterfaceRealm OBJECT-TYPE SYNTAX INTEGER { private (1), public (2) } MAX-ACCESS read-create STATUS deprecated DESCRIPTION "This object identifies whether this interface is connected to the private or the public realm." DEFVAL { public } ::= { natInterfaceEntry 1 } natInterfaceServiceType OBJECT-TYPE SYNTAX BITS { basicNat (0), napt (1), bidirectionalNat (2), twiceNat (3) } MAX-ACCESS read-create STATUS deprecated DESCRIPTION "An indication of the direction in which new sessions are permitted and the extent of translation done within the IP and transport headers." ::= { natInterfaceEntry 2 } natInterfaceInTranslates OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS deprecated DESCRIPTION "Number of packets received on this interface that Perreault, et al. Expires August 25, 2013 [Page 14] Internet-Draft NEW NAT MIB February 2013 were translated. Discontinuities in the value of this counter can occur at reinitialization of the management system and at other times as indicated by the value of ifCounterDiscontinuityTime on the relevant interface." ::= { natInterfaceEntry 3 } natInterfaceOutTranslates OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS deprecated DESCRIPTION "Number of translated packets that were sent out this interface. Discontinuities in the value of this counter can occur at reinitialization of the management system and at other times as indicated by the value of ifCounterDiscontinuityTime on the relevant interface." ::= { natInterfaceEntry 4 } natInterfaceDiscards OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS deprecated DESCRIPTION "Number of packets that had to be rejected/dropped due to a lack of resources for this interface. Discontinuities in the value of this counter can occur at reinitialization of the management system and at other times as indicated by the value of ifCounterDiscontinuityTime on the relevant interface." ::= { natInterfaceEntry 5 } natInterfaceStorageType OBJECT-TYPE SYNTAX StorageType MAX-ACCESS read-create STATUS deprecated DESCRIPTION "The storage type for this conceptual row. Conceptual rows having the value 'permanent' need not allow write-access to any columnar objects in the row." REFERENCE "Textual Conventions for SMIv2, Section 2." DEFVAL { nonVolatile } ::= { natInterfaceEntry 6 } Perreault, et al. Expires August 25, 2013 [Page 15] Internet-Draft NEW NAT MIB February 2013 natInterfaceRowStatus OBJECT-TYPE SYNTAX RowStatus MAX-ACCESS read-create STATUS deprecated DESCRIPTION "The status of this conceptual row. Until instances of all corresponding columns are appropriately configured, the value of the corresponding instance of the natInterfaceRowStatus column is 'notReady'. In particular, a newly created row cannot be made active until the corresponding instance of natInterfaceServiceType has been set. None of the objects in this row may be modified while the value of this object is active(1)." REFERENCE "Textual Conventions for SMIv2, Section 2." ::= { natInterfaceEntry 7 } -- -- The Address Map Table -- natAddrMapTable OBJECT-TYPE SYNTAX SEQUENCE OF NatAddrMapEntry MAX-ACCESS not-accessible STATUS deprecated DESCRIPTION "This table lists address map parameters for NAT." ::= { natMIBObjects 4 } natAddrMapEntry OBJECT-TYPE SYNTAX NatAddrMapEntry MAX-ACCESS not-accessible STATUS deprecated DESCRIPTION "This entry represents an address map to be used for NAT and contributes to the dynamic and/or static address mapping tables of the NAT device." INDEX { ifIndex, natAddrMapIndex } ::= { natAddrMapTable 1 } NatAddrMapEntry ::= SEQUENCE { natAddrMapIndex NatAddrMapId, Perreault, et al. Expires August 25, 2013 [Page 16] Internet-Draft NEW NAT MIB February 2013 natAddrMapName SnmpAdminString, natAddrMapEntryType NatAssociationType, natAddrMapTranslationEntity NatTranslationEntity, natAddrMapLocalAddrType InetAddressType, natAddrMapLocalAddrFrom InetAddress, natAddrMapLocalAddrTo InetAddress, natAddrMapLocalPortFrom InetPortNumber, natAddrMapLocalPortTo InetPortNumber, natAddrMapGlobalAddrType InetAddressType, natAddrMapGlobalAddrFrom InetAddress, natAddrMapGlobalAddrTo InetAddress, natAddrMapGlobalPortFrom InetPortNumber, natAddrMapGlobalPortTo InetPortNumber, natAddrMapProtocol NatProtocolMap, natAddrMapInTranslates Counter64, natAddrMapOutTranslates Counter64, natAddrMapDiscards Counter64, natAddrMapAddrUsed Gauge32, natAddrMapStorageType StorageType, natAddrMapRowStatus RowStatus } natAddrMapIndex OBJECT-TYPE SYNTAX NatAddrMapId MAX-ACCESS not-accessible STATUS deprecated DESCRIPTION "Along with ifIndex, this object uniquely identifies an entry in the natAddrMapTable. Address map entries are applied in the order specified by natAddrMapIndex." ::= { natAddrMapEntry 1 } natAddrMapName OBJECT-TYPE SYNTAX SnmpAdminString (SIZE(1..32)) MAX-ACCESS read-create STATUS deprecated DESCRIPTION "Name identifying all map entries in the table associated with the same interface. All map entries with the same ifIndex MUST have the same map name." ::= { natAddrMapEntry 2 } natAddrMapEntryType OBJECT-TYPE SYNTAX NatAssociationType MAX-ACCESS read-create STATUS deprecated DESCRIPTION Perreault, et al. Expires August 25, 2013 [Page 17] Internet-Draft NEW NAT MIB February 2013 "This parameter can be used to set up static or dynamic address maps." ::= { natAddrMapEntry 3 } natAddrMapTranslationEntity OBJECT-TYPE SYNTAX NatTranslationEntity MAX-ACCESS read-create STATUS deprecated DESCRIPTION "The end-point entity (source or destination) in inbound or outbound sessions (i.e., first packets) that may be translated by an address map entry. Session direction (inbound or outbound) is derived from the direction of the first packet of a session traversing a NAT interface. NAT address (and Transport-ID) maps may be defined to effect inbound or outbound sessions. Traditionally, address maps for Basic NAT and NAPT are configured on a public interface for outbound sessions, effecting translation of source end-point. The value of this object must be set to outboundSrcEndPoint for those interfaces. Alternately, if address maps for Basic NAT and NAPT were to be configured on a private interface, the desired value for this object for the map entries would be inboundSrcEndPoint (i.e., effecting translation of source end-point for inbound sessions). If TwiceNAT were to be configured on a private interface, the desired value for this object for the map entries would be a bitmask of inboundSrcEndPoint and inboundDstEndPoint." ::= { natAddrMapEntry 4 } natAddrMapLocalAddrType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS read-create STATUS deprecated DESCRIPTION "This object specifies the address type used for natAddrMapLocalAddrFrom and natAddrMapLocalAddrTo." ::= { natAddrMapEntry 5 } natAddrMapLocalAddrFrom OBJECT-TYPE SYNTAX InetAddress Perreault, et al. Expires August 25, 2013 [Page 18] Internet-Draft NEW NAT MIB February 2013 MAX-ACCESS read-create STATUS deprecated DESCRIPTION "This object specifies the first IP address of the range of IP addresses mapped by this translation entry. The value of this object must be less than or equal to the value of the natAddrMapLocalAddrTo object. The type of this address is determined by the value of the natAddrMapLocalAddrType object." ::= { natAddrMapEntry 6 } natAddrMapLocalAddrTo OBJECT-TYPE SYNTAX InetAddress MAX-ACCESS read-create STATUS deprecated DESCRIPTION "This object specifies the last IP address of the range of IP addresses mapped by this translation entry. If only a single address is being mapped, the value of this object is equal to the value of natAddrMapLocalAddrFrom. For a static NAT, the number of addresses in the range defined by natAddrMapLocalAddrFrom and natAddrMapLocalAddrTo must be equal to the number of addresses in the range defined by natAddrMapGlobalAddrFrom and natAddrMapGlobalAddrTo. The value of this object must be greater than or equal to the value of the natAddrMapLocalAddrFrom object. The type of this address is determined by the value of the natAddrMapLocalAddrType object." ::= { natAddrMapEntry 7 } natAddrMapLocalPortFrom OBJECT-TYPE SYNTAX InetPortNumber MAX-ACCESS read-create STATUS deprecated DESCRIPTION "If this conceptual row describes a Basic NAT address mapping, then the value of this object must be zero. If this conceptual row describes NAPT, then the value of this object specifies the first port number in the range of ports being mapped. The value of this object must be less than or equal to the value of the natAddrMapLocalPortTo object. If the translation specifies a single port, then the value of this object is equal to the value of natAddrMapLocalPortTo." DEFVAL { 0 } Perreault, et al. Expires August 25, 2013 [Page 19] Internet-Draft NEW NAT MIB February 2013 ::= { natAddrMapEntry 8 } natAddrMapLocalPortTo OBJECT-TYPE SYNTAX InetPortNumber MAX-ACCESS read-create STATUS deprecated DESCRIPTION "If this conceptual row describes a Basic NAT address mapping, then the value of this object must be zero. If this conceptual row describes NAPT, then the value of this object specifies the last port number in the range of ports being mapped. The value of this object must be greater than or equal to the value of the natAddrMapLocalPortFrom object. If the translation specifies a single port, then the value of this object is equal to the value of natAddrMapLocalPortFrom." DEFVAL { 0 } ::= { natAddrMapEntry 9 } natAddrMapGlobalAddrType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS read-create STATUS deprecated DESCRIPTION "This object specifies the address type used for natAddrMapGlobalAddrFrom and natAddrMapGlobalAddrTo." ::= { natAddrMapEntry 10 } natAddrMapGlobalAddrFrom OBJECT-TYPE SYNTAX InetAddress MAX-ACCESS read-create STATUS deprecated DESCRIPTION "This object specifies the first IP address of the range of IP addresses being mapped to. The value of this object must be less than or equal to the value of the natAddrMapGlobalAddrTo object. The type of this address is determined by the value of the natAddrMapGlobalAddrType object." ::= { natAddrMapEntry 11 } natAddrMapGlobalAddrTo OBJECT-TYPE SYNTAX InetAddress MAX-ACCESS read-create STATUS deprecated DESCRIPTION Perreault, et al. Expires August 25, 2013 [Page 20] Internet-Draft NEW NAT MIB February 2013 "This object specifies the last IP address of the range of IP addresses being mapped to. If only a single address is being mapped to, the value of this object is equal to the value of natAddrMapGlobalAddrFrom. For a static NAT, the number of addresses in the range defined by natAddrMapGlobalAddrFrom and natAddrMapGlobalAddrTo must be equal to the number of addresses in the range defined by natAddrMapLocalAddrFrom and natAddrMapLocalAddrTo. The value of this object must be greater than or equal to the value of the natAddrMapGlobalAddrFrom object. The type of this address is determined by the value of the natAddrMapGlobalAddrType object." ::= { natAddrMapEntry 12 } natAddrMapGlobalPortFrom OBJECT-TYPE SYNTAX InetPortNumber MAX-ACCESS read-create STATUS deprecated DESCRIPTION "If this conceptual row describes a Basic NAT address mapping, then the value of this object must be zero. If this conceptual row describes NAPT, then the value of this object specifies the first port number in the range of ports being mapped to. The value of this object must be less than or equal to the value of the natAddrMapGlobalPortTo object. If the translation specifies a single port, then the value of this object is equal to the value natAddrMapGlobalPortTo." DEFVAL { 0 } ::= { natAddrMapEntry 13 } natAddrMapGlobalPortTo OBJECT-TYPE SYNTAX InetPortNumber MAX-ACCESS read-create STATUS deprecated DESCRIPTION "If this conceptual row describes a Basic NAT address mapping, then the value of this object must be zero. If this conceptual row describes NAPT, then the value of this object specifies the last port number in the range of ports being mapped to. The value of this object must be greater than or equal to the value of the natAddrMapGlobalPortFrom object. If the translation specifies a single port, then the value of this Perreault, et al. Expires August 25, 2013 [Page 21] Internet-Draft NEW NAT MIB February 2013 object is equal to the value of natAddrMapGlobalPortFrom." DEFVAL { 0 } ::= { natAddrMapEntry 14 } natAddrMapProtocol OBJECT-TYPE SYNTAX NatProtocolMap MAX-ACCESS read-create STATUS deprecated DESCRIPTION "This object specifies a bitmap of protocol identifiers." ::= { natAddrMapEntry 15 } natAddrMapInTranslates OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The number of inbound packets pertaining to this address map entry that were translated. Discontinuities in the value of this counter can occur at reinitialization of the management system and at other times, as indicated by the value of ifCounterDiscontinuityTime on the relevant interface." ::= { natAddrMapEntry 16 } natAddrMapOutTranslates OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The number of outbound packets pertaining to this address map entry that were translated. Discontinuities in the value of this counter can occur at reinitialization of the management system and at other times, as indicated by the value of ifCounterDiscontinuityTime on the relevant interface." ::= { natAddrMapEntry 17 } natAddrMapDiscards OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The number of packets pertaining to this address map entry that were dropped due to lack of addresses in the address pool identified by this address map. The value of Perreault, et al. Expires August 25, 2013 [Page 22] Internet-Draft NEW NAT MIB February 2013 this object must always be zero in case of static address map. Discontinuities in the value of this counter can occur at reinitialization of the management system and at other times, as indicated by the value of ifCounterDiscontinuityTime on the relevant interface." ::= { natAddrMapEntry 18 } natAddrMapAddrUsed OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The number of addresses pertaining to this address map that are currently being used from the NAT pool. The value of this object must always be zero in the case of a static address map." ::= { natAddrMapEntry 19 } natAddrMapStorageType OBJECT-TYPE SYNTAX StorageType MAX-ACCESS read-create STATUS deprecated DESCRIPTION "The storage type for this conceptual row. Conceptual rows having the value 'permanent' need not allow write-access to any columnar objects in the row." REFERENCE "Textual Conventions for SMIv2, Section 2." DEFVAL { nonVolatile } ::= { natAddrMapEntry 20 } natAddrMapRowStatus OBJECT-TYPE SYNTAX RowStatus MAX-ACCESS read-create STATUS deprecated DESCRIPTION "The status of this conceptual row. Until instances of all corresponding columns are appropriately configured, the value of the corresponding instance of the natAddrMapRowStatus column is 'notReady'. None of the objects in this row may be modified while the value of this object is active(1)." Perreault, et al. Expires August 25, 2013 [Page 23] Internet-Draft NEW NAT MIB February 2013 REFERENCE "Textual Conventions for SMIv2, Section 2." ::= { natAddrMapEntry 21 } -- -- Address Bind section -- natAddrBindNumberOfEntries OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS deprecated DESCRIPTION "This object maintains a count of the number of entries that currently exist in the natAddrBindTable." ::= { natMIBObjects 5 } -- -- The NAT Address BIND Table -- natAddrBindTable OBJECT-TYPE SYNTAX SEQUENCE OF NatAddrBindEntry MAX-ACCESS not-accessible STATUS deprecated DESCRIPTION "This table holds information about the currently active NAT BINDs." ::= { natMIBObjects 6 } natAddrBindEntry OBJECT-TYPE SYNTAX NatAddrBindEntry MAX-ACCESS not-accessible STATUS deprecated DESCRIPTION "Each entry in this table holds information about an active address BIND. These entries are lost upon agent restart. This row has indexing which may create variables with more than 128 subidentifiers. Implementers of this table must be careful not to create entries that would result in OIDs which exceed the 128 subidentifier limit. Otherwise, the information cannot be accessed using SNMPv1, SNMPv2c or SNMPv3." INDEX { ifIndex, natAddrBindLocalAddrType, natAddrBindLocalAddr } ::= { natAddrBindTable 1 } Perreault, et al. Expires August 25, 2013 [Page 24] Internet-Draft NEW NAT MIB February 2013 NatAddrBindEntry ::= SEQUENCE { natAddrBindLocalAddrType InetAddressType, natAddrBindLocalAddr InetAddress, natAddrBindGlobalAddrType InetAddressType, natAddrBindGlobalAddr InetAddress, natAddrBindId NatBindId, natAddrBindTranslationEntity NatTranslationEntity, natAddrBindType NatAssociationType, natAddrBindMapIndex NatAddrMapId, natAddrBindSessions Gauge32, natAddrBindMaxIdleTime TimeTicks, natAddrBindCurrentIdleTime TimeTicks, natAddrBindInTranslates Counter64, natAddrBindOutTranslates Counter64 } natAddrBindLocalAddrType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS not-accessible STATUS deprecated DESCRIPTION "This object specifies the address type used for natAddrBindLocalAddr." ::= { natAddrBindEntry 1 } natAddrBindLocalAddr OBJECT-TYPE SYNTAX InetAddress MAX-ACCESS not-accessible STATUS deprecated DESCRIPTION "This object represents the private-realm specific network layer address, which maps to the public-realm address represented by natAddrBindGlobalAddr. The type of this address is determined by the value of the natAddrBindLocalAddrType object." ::= { natAddrBindEntry 2 } natAddrBindGlobalAddrType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS read-only STATUS deprecated DESCRIPTION "This object specifies the address type used for natAddrBindGlobalAddr." ::= { natAddrBindEntry 3 } natAddrBindGlobalAddr OBJECT-TYPE Perreault, et al. Expires August 25, 2013 [Page 25] Internet-Draft NEW NAT MIB February 2013 SYNTAX InetAddress MAX-ACCESS read-only STATUS deprecated DESCRIPTION "This object represents the public-realm network layer address that maps to the private-realm network layer address represented by natAddrBindLocalAddr. The type of this address is determined by the value of the natAddrBindGlobalAddrType object." ::= { natAddrBindEntry 4 } natAddrBindId OBJECT-TYPE SYNTAX NatBindId MAX-ACCESS read-only STATUS deprecated DESCRIPTION "This object represents a bind id that is dynamically assigned to each bind by a NAT enabled device. Each bind is represented by a bind id that is unique across both, the natAddrBindTable and the natAddrPortBindTable." ::= { natAddrBindEntry 5 } natAddrBindTranslationEntity OBJECT-TYPE SYNTAX NatTranslationEntity MAX-ACCESS read-only STATUS deprecated DESCRIPTION "This object represents the direction of sessions for which this bind is applicable and the endpoint entity (source or destination) within the sessions that is subject to translation using the BIND. Orientation of the bind can be a superset of translationEntity of the address map entry which forms the basis for this bind. For example, if the translationEntity of an address map entry is outboundSrcEndPoint, the translationEntity of a bind derived from this map entry may either be outboundSrcEndPoint or it may be bidirectional (a bitmask of outboundSrcEndPoint and inboundDstEndPoint)." ::= { natAddrBindEntry 6 } natAddrBindType OBJECT-TYPE SYNTAX NatAssociationType Perreault, et al. Expires August 25, 2013 [Page 26] Internet-Draft NEW NAT MIB February 2013 MAX-ACCESS read-only STATUS deprecated DESCRIPTION "This object indicates whether the bind is static or dynamic." ::= { natAddrBindEntry 7 } natAddrBindMapIndex OBJECT-TYPE SYNTAX NatAddrMapId MAX-ACCESS read-only STATUS deprecated DESCRIPTION "This object is a pointer to the natAddrMapTable entry (and the parameters of that entry) which was used in creating this BIND. This object, in conjunction with the ifIndex (which identifies a unique addrMapName) points to a unique entry in the natAddrMapTable." ::= { natAddrBindEntry 8 } natAddrBindSessions OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS deprecated DESCRIPTION "Number of sessions currently using this BIND." ::= { natAddrBindEntry 9 } natAddrBindMaxIdleTime OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS deprecated DESCRIPTION "This object indicates the maximum time for which this bind can be idle with no sessions attached to it. The value of this object is of relevance only for dynamic NAT." ::= { natAddrBindEntry 10 } natAddrBindCurrentIdleTime OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS deprecated DESCRIPTION "At any given instance, this object indicates the time that this bind has been idle without any sessions attached to it. Perreault, et al. Expires August 25, 2013 [Page 27] Internet-Draft NEW NAT MIB February 2013 The value of this object is of relevance only for dynamic NAT." ::= { natAddrBindEntry 11 } natAddrBindInTranslates OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The number of inbound packets that were successfully translated by using this bind entry. Discontinuities in the value of this counter can occur at reinitialization of the management system and at other times, as indicated by the value of ifCounterDiscontinuityTime on the relevant interface." ::= { natAddrBindEntry 12 } natAddrBindOutTranslates OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The number of outbound packets that were successfully translated using this bind entry. Discontinuities in the value of this counter can occur at reinitialization of the management system and at other times as indicated by the value of ifCounterDiscontinuityTime on the relevant interface." ::= { natAddrBindEntry 13 } -- -- Address Port Bind section -- natAddrPortBindNumberOfEntries OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS deprecated DESCRIPTION "This object maintains a count of the number of entries that currently exist in the natAddrPortBindTable." ::= { natMIBObjects 7 } -- -- The NAT Address Port Bind Table -- Perreault, et al. Expires August 25, 2013 [Page 28] Internet-Draft NEW NAT MIB February 2013 natAddrPortBindTable OBJECT-TYPE SYNTAX SEQUENCE OF NatAddrPortBindEntry MAX-ACCESS not-accessible STATUS deprecated DESCRIPTION "This table holds information about the currently active NAPT BINDs." ::= { natMIBObjects 8 } natAddrPortBindEntry OBJECT-TYPE SYNTAX NatAddrPortBindEntry MAX-ACCESS not-accessible STATUS deprecated DESCRIPTION "Each entry in the this table holds information about a NAPT bind that is currently active. These entries are lost upon agent restart. This row has indexing which may create variables with more than 128 subidentifiers. Implementers of this table must be careful not to create entries which would result in OIDs that exceed the 128 subidentifier limit. Otherwise, the information cannot be accessed using SNMPv1, SNMPv2c or SNMPv3." INDEX { ifIndex, natAddrPortBindLocalAddrType, natAddrPortBindLocalAddr, natAddrPortBindLocalPort, natAddrPortBindProtocol } ::= { natAddrPortBindTable 1 } NatAddrPortBindEntry ::= SEQUENCE { natAddrPortBindLocalAddrType InetAddressType, natAddrPortBindLocalAddr InetAddress, natAddrPortBindLocalPort InetPortNumber, natAddrPortBindProtocol NatProtocolType, natAddrPortBindGlobalAddrType InetAddressType, natAddrPortBindGlobalAddr InetAddress, natAddrPortBindGlobalPort InetPortNumber, natAddrPortBindId NatBindId, natAddrPortBindTranslationEntity NatTranslationEntity, natAddrPortBindType NatAssociationType, natAddrPortBindMapIndex NatAddrMapId, natAddrPortBindSessions Gauge32, natAddrPortBindMaxIdleTime TimeTicks, natAddrPortBindCurrentIdleTime TimeTicks, natAddrPortBindInTranslates Counter64, natAddrPortBindOutTranslates Counter64 } Perreault, et al. Expires August 25, 2013 [Page 29] Internet-Draft NEW NAT MIB February 2013 natAddrPortBindLocalAddrType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS not-accessible STATUS deprecated DESCRIPTION "This object specifies the address type used for natAddrPortBindLocalAddr." ::= { natAddrPortBindEntry 1 } natAddrPortBindLocalAddr OBJECT-TYPE SYNTAX InetAddress MAX-ACCESS not-accessible STATUS deprecated DESCRIPTION "This object represents the private-realm specific network layer address which, in conjunction with natAddrPortBindLocalPort, maps to the public-realm network layer address and transport id represented by natAddrPortBindGlobalAddr and natAddrPortBindGlobalPort respectively. The type of this address is determined by the value of the natAddrPortBindLocalAddrType object." ::= { natAddrPortBindEntry 2 } natAddrPortBindLocalPort OBJECT-TYPE SYNTAX InetPortNumber MAX-ACCESS not-accessible STATUS deprecated DESCRIPTION "For a protocol value TCP or UDP, this object represents the private-realm specific port number. On the other hand, for ICMP a bind is created only for query/response type ICMP messages such as ICMP echo, Timestamp, and Information request messages, and this object represents the private-realm specific identifier in the ICMP message, as defined in RFC 792 for ICMPv4 and in RFC 2463 for ICMPv6. This object, together with natAddrPortBindProtocol, natAddrPortBindLocalAddrType, and natAddrPortBindLocalAddr, constitutes a session endpoint in the private realm. A bind entry binds a private realm specific endpoint to a public realm specific endpoint, as represented by the tuple of (natAddrPortBindGlobalPort, natAddrPortBindProtocol, natAddrPortBindGlobalAddrType, and natAddrPortBindGlobalAddr)." Perreault, et al. Expires August 25, 2013 [Page 30] Internet-Draft NEW NAT MIB February 2013 ::= { natAddrPortBindEntry 3 } natAddrPortBindProtocol OBJECT-TYPE SYNTAX NatProtocolType MAX-ACCESS not-accessible STATUS deprecated DESCRIPTION "This object specifies a protocol identifier. If the value of this object is none(1), then this bind entry applies to all IP traffic. Any other value of this object specifies the class of IP traffic to which this BIND applies." ::= { natAddrPortBindEntry 4 } natAddrPortBindGlobalAddrType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS read-only STATUS deprecated DESCRIPTION "This object specifies the address type used for natAddrPortBindGlobalAddr." ::= { natAddrPortBindEntry 5 } natAddrPortBindGlobalAddr OBJECT-TYPE SYNTAX InetAddress MAX-ACCESS read-only STATUS deprecated DESCRIPTION "This object represents the public-realm specific network layer address that, in conjunction with natAddrPortBindGlobalPort, maps to the private-realm network layer address and transport id represented by natAddrPortBindLocalAddr and natAddrPortBindLocalPort, respectively. The type of this address is determined by the value of the natAddrPortBindGlobalAddrType object." ::= { natAddrPortBindEntry 6 } natAddrPortBindGlobalPort OBJECT-TYPE SYNTAX InetPortNumber MAX-ACCESS read-only STATUS deprecated DESCRIPTION "For a protocol value TCP or UDP, this object represents the public-realm specific port number. On the other hand, for ICMP a bind is created only for query/response Perreault, et al. Expires August 25, 2013 [Page 31] Internet-Draft NEW NAT MIB February 2013 type ICMP messages such as ICMP echo, Timestamp, and Information request messages, and this object represents the public-realm specific identifier in the ICMP message, as defined in RFC 792 for ICMPv4 and in RFC 2463 for ICMPv6. This object, together with natAddrPortBindProtocol, natAddrPortBindGlobalAddrType, and natAddrPortBindGlobalAddr, constitutes a session endpoint in the public realm. A bind entry binds a public realm specific endpoint to a private realm specific endpoint, as represented by the tuple of (natAddrPortBindLocalPort, natAddrPortBindProtocol, natAddrPortBindLocalAddrType, and natAddrPortBindLocalAddr)." ::= { natAddrPortBindEntry 7 } natAddrPortBindId OBJECT-TYPE SYNTAX NatBindId MAX-ACCESS read-only STATUS deprecated DESCRIPTION "This object represents a bind id that is dynamically assigned to each bind by a NAT enabled device. Each bind is represented by a unique bind id across both the natAddrBindTable and the natAddrPortBindTable." ::= { natAddrPortBindEntry 8 } natAddrPortBindTranslationEntity OBJECT-TYPE SYNTAX NatTranslationEntity MAX-ACCESS read-only STATUS deprecated DESCRIPTION "This object represents the direction of sessions for which this bind is applicable and the entity (source or destination) within the sessions that is subject to translation with the BIND. Orientation of the bind can be a superset of the translationEntity of the address map entry that forms the basis for this bind. For example, if the translationEntity of an address map entry is outboundSrcEndPoint, the translationEntity of a bind derived from this map entry may either be outboundSrcEndPoint or may be bidirectional (a bitmask of outboundSrcEndPoint and inboundDstEndPoint)." Perreault, et al. Expires August 25, 2013 [Page 32] Internet-Draft NEW NAT MIB February 2013 ::= { natAddrPortBindEntry 9 } natAddrPortBindType OBJECT-TYPE SYNTAX NatAssociationType MAX-ACCESS read-only STATUS deprecated DESCRIPTION "This object indicates whether the bind is static or dynamic." ::= { natAddrPortBindEntry 10 } natAddrPortBindMapIndex OBJECT-TYPE SYNTAX NatAddrMapId MAX-ACCESS read-only STATUS deprecated DESCRIPTION "This object is a pointer to the natAddrMapTable entry (and the parameters of that entry) used in creating this BIND. This object, in conjunction with the ifIndex (which identifies a unique addrMapName), points to a unique entry in the natAddrMapTable." ::= { natAddrPortBindEntry 11 } natAddrPortBindSessions OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS deprecated DESCRIPTION "Number of sessions currently using this BIND." ::= { natAddrPortBindEntry 12 } natAddrPortBindMaxIdleTime OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS deprecated DESCRIPTION "This object indicates the maximum time for which this bind can be idle without any sessions attached to it. The value of this object is of relevance only for dynamic NAT." ::= { natAddrPortBindEntry 13 } natAddrPortBindCurrentIdleTime OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS deprecated Perreault, et al. Expires August 25, 2013 [Page 33] Internet-Draft NEW NAT MIB February 2013 DESCRIPTION "At any given instance, this object indicates the time that this bind has been idle without any sessions attached to it. The value of this object is of relevance only for dynamic NAT." ::= { natAddrPortBindEntry 14 } natAddrPortBindInTranslates OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The number of inbound packets that were translated as per this bind entry. Discontinuities in the value of this counter can occur at reinitialization of the management system and at other times, as indicated by the value of ifCounterDiscontinuityTime on the relevant interface." ::= { natAddrPortBindEntry 15 } natAddrPortBindOutTranslates OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The number of outbound packets that were translated as per this bind entry. Discontinuities in the value of this counter can occur at reinitialization of the management system and at other times, as indicated by the value of ifCounterDiscontinuityTime on the relevant interface." ::= { natAddrPortBindEntry 16 } -- -- The Session Table -- natSessionTable OBJECT-TYPE SYNTAX SEQUENCE OF NatSessionEntry MAX-ACCESS not-accessible STATUS deprecated DESCRIPTION "The (conceptual) table containing one entry for each NAT session currently active on this NAT device." Perreault, et al. Expires August 25, 2013 [Page 34] Internet-Draft NEW NAT MIB February 2013 ::= { natMIBObjects 9 } natSessionEntry OBJECT-TYPE SYNTAX NatSessionEntry MAX-ACCESS not-accessible STATUS deprecated DESCRIPTION "An entry (conceptual row) containing information about an active NAT session on this NAT device. These entries are lost upon agent restart." INDEX { ifIndex, natSessionIndex } ::= { natSessionTable 1 } NatSessionEntry ::= SEQUENCE { natSessionIndex NatSessionId, natSessionPrivateSrcEPBindId NatBindIdOrZero, natSessionPrivateSrcEPBindMode NatBindMode, natSessionPrivateDstEPBindId NatBindIdOrZero, natSessionPrivateDstEPBindMode NatBindMode, natSessionDirection INTEGER, natSessionUpTime TimeTicks, natSessionAddrMapIndex NatAddrMapId, natSessionProtocolType NatProtocolType, natSessionPrivateAddrType InetAddressType, natSessionPrivateSrcAddr InetAddress, natSessionPrivateSrcPort InetPortNumber, natSessionPrivateDstAddr InetAddress, natSessionPrivateDstPort InetPortNumber, natSessionPublicAddrType InetAddressType, natSessionPublicSrcAddr InetAddress, natSessionPublicSrcPort InetPortNumber, natSessionPublicDstAddr InetAddress, natSessionPublicDstPort InetPortNumber, natSessionMaxIdleTime TimeTicks, natSessionCurrentIdleTime TimeTicks, natSessionInTranslates Counter64, natSessionOutTranslates Counter64 } natSessionIndex OBJECT-TYPE SYNTAX NatSessionId MAX-ACCESS not-accessible STATUS deprecated DESCRIPTION "The session ID for this NAT session." ::= { natSessionEntry 1 } natSessionPrivateSrcEPBindId OBJECT-TYPE Perreault, et al. Expires August 25, 2013 [Page 35] Internet-Draft NEW NAT MIB February 2013 SYNTAX NatBindIdOrZero MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The bind id associated between private and public source end points. In the case of Symmetric-NAT, this should be set to zero." ::= { natSessionEntry 2 } natSessionPrivateSrcEPBindMode OBJECT-TYPE SYNTAX NatBindMode MAX-ACCESS read-only STATUS deprecated DESCRIPTION "This object indicates whether the bind indicated by the object natSessionPrivateSrcEPBindId is an address bind or an address port bind." ::= { natSessionEntry 3 } natSessionPrivateDstEPBindId OBJECT-TYPE SYNTAX NatBindIdOrZero MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The bind id associated between private and public destination end points." ::= { natSessionEntry 4 } natSessionPrivateDstEPBindMode OBJECT-TYPE SYNTAX NatBindMode MAX-ACCESS read-only STATUS deprecated DESCRIPTION "This object indicates whether the bind indicated by the object natSessionPrivateDstEPBindId is an address bind or an address port bind." ::= { natSessionEntry 5 } natSessionDirection OBJECT-TYPE SYNTAX INTEGER { inbound (1), outbound (2) } MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The direction of this session with respect to the Perreault, et al. Expires August 25, 2013 [Page 36] Internet-Draft NEW NAT MIB February 2013 local network. 'inbound' indicates that this session was initiated from the public network into the private network. 'outbound' indicates that this session was initiated from the private network into the public network." ::= { natSessionEntry 6 } natSessionUpTime OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The up time of this session in one-hundredths of a second." ::= { natSessionEntry 7 } natSessionAddrMapIndex OBJECT-TYPE SYNTAX NatAddrMapId MAX-ACCESS read-only STATUS deprecated DESCRIPTION "This object is a pointer to the natAddrMapTable entry (and the parameters of that entry) used in creating this session. This object, in conjunction with the ifIndex (which identifies a unique addrMapName), points to a unique entry in the natAddrMapTable." ::= { natSessionEntry 8 } natSessionProtocolType OBJECT-TYPE SYNTAX NatProtocolType MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The protocol type of this session." ::= { natSessionEntry 9 } natSessionPrivateAddrType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS read-only STATUS deprecated DESCRIPTION "This object specifies the address type used for natSessionPrivateSrcAddr and natSessionPrivateDstAddr." ::= { natSessionEntry 10 } natSessionPrivateSrcAddr OBJECT-TYPE SYNTAX InetAddress MAX-ACCESS read-only Perreault, et al. Expires August 25, 2013 [Page 37] Internet-Draft NEW NAT MIB February 2013 STATUS deprecated DESCRIPTION "The source IP address of the session endpoint that lies in the private network. The value of this object must be zero only when the natSessionPrivateSrcEPBindId object has a zero value. When the value of this object is zero, the NAT session lookup will match any IP address to this field. The type of this address is determined by the value of the natSessionPrivateAddrType object." ::= { natSessionEntry 11 } natSessionPrivateSrcPort OBJECT-TYPE SYNTAX InetPortNumber MAX-ACCESS read-only STATUS deprecated DESCRIPTION "When the value of protocol is TCP or UDP, this object represents the source port in the first packet of session while in private-realm. On the other hand, when the protocol is ICMP, a NAT session is created only for query/response type ICMP messages such as ICMP echo, Timestamp, and Information request messages, and this object represents the private-realm specific identifier in the ICMP message, as defined in RFC 792 for ICMPv4 and in RFC 2463 for ICMPv6. The value of this object must be zero when the natSessionPrivateSrcEPBindId object has zero value and value of natSessionPrivateSrcEPBindMode is addressPortBind(2). In such a case, the NAT session lookup will match any port number to this field. The value of this object must be zero when the object is not a representative field (SrcPort, DstPort, or ICMP identifier) of the session tuple in either the public realm or the private realm." ::= { natSessionEntry 12 } natSessionPrivateDstAddr OBJECT-TYPE SYNTAX InetAddress MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The destination IP address of the session endpoint that lies in the private network. Perreault, et al. Expires August 25, 2013 [Page 38] Internet-Draft NEW NAT MIB February 2013 The value of this object must be zero when the natSessionPrivateDstEPBindId object has a zero value. In such a scenario, the NAT session lookup will match any IP address to this field. The type of this address is determined by the value of the natSessionPrivateAddrType object." ::= { natSessionEntry 13 } natSessionPrivateDstPort OBJECT-TYPE SYNTAX InetPortNumber MAX-ACCESS read-only STATUS deprecated DESCRIPTION "When the value of protocol is TCP or UDP, this object represents the destination port in the first packet of session while in private-realm. On the other hand, when the protocol is ICMP, this object is not relevant and should be set to zero. The value of this object must be zero when the natSessionPrivateDstEPBindId object has a zero value and natSessionPrivateDstEPBindMode is set to addressPortBind(2). In such a case, the NAT session lookup will match any port number to this field. The value of this object must be zero when the object is not a representative field (SrcPort, DstPort, or ICMP identifier) of the session tuple in either the public realm or the private realm." ::= { natSessionEntry 14 } natSessionPublicAddrType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS read-only STATUS deprecated DESCRIPTION "This object specifies the address type used for natSessionPublicSrcAddr and natSessionPublicDstAddr." ::= { natSessionEntry 15 } natSessionPublicSrcAddr OBJECT-TYPE SYNTAX InetAddress MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The source IP address of the session endpoint that lies in the public network. Perreault, et al. Expires August 25, 2013 [Page 39] Internet-Draft NEW NAT MIB February 2013 The value of this object must be zero when the natSessionPrivateSrcEPBindId object has a zero value. In such a scenario, the NAT session lookup will match any IP address to this field. The type of this address is determined by the value of the natSessionPublicAddrType object." ::= { natSessionEntry 16 } natSessionPublicSrcPort OBJECT-TYPE SYNTAX InetPortNumber MAX-ACCESS read-only STATUS deprecated DESCRIPTION "When the value of protocol is TCP or UDP, this object represents the source port in the first packet of session while in public-realm. On the other hand, when protocol is ICMP, a NAT session is created only for query/response type ICMP messages such as ICMP echo, Timestamp, and Information request messages, and this object represents the public-realm specific identifier in the ICMP message, as defined in RFC 792 for ICMPv4 and in RFC 2463 for ICMPv6. The value of this object must be zero when the natSessionPrivateSrcEPBindId object has a zero value and natSessionPrivateSrcEPBindMode is set to addressPortBind(2). In such a scenario, the NAT session lookup will match any port number to this field. The value of this object must be zero when the object is not a representative field (SrcPort, DstPort or ICMP identifier) of the session tuple in either the public realm or the private realm." ::= { natSessionEntry 17 } natSessionPublicDstAddr OBJECT-TYPE SYNTAX InetAddress MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The destination IP address of the session endpoint that lies in the public network. The value of this object must be non-zero when the natSessionPrivateDstEPBindId object has a non-zero value. If the value of this object and the Perreault, et al. Expires August 25, 2013 [Page 40] Internet-Draft NEW NAT MIB February 2013 corresponding natSessionPrivateDstEPBindId object value is zero, then the NAT session lookup will match any IP address to this field. The type of this address is determined by the value of the natSessionPublicAddrType object." ::= { natSessionEntry 18 } natSessionPublicDstPort OBJECT-TYPE SYNTAX InetPortNumber MAX-ACCESS read-only STATUS deprecated DESCRIPTION "When the value of protocol is TCP or UDP, this object represents the destination port in the first packet of session while in public-realm. On the other hand, when the protocol is ICMP, this object is not relevant for translation and should be zero. The value of this object must be zero when the natSessionPrivateDstEPBindId object has a zero value and natSessionPrivateDstEPBindMode is addressPortBind(2). In such a scenario, the NAT session lookup will match any port number to this field. The value of this object must be zero when the object is not a representative field (SrcPort, DstPort, or ICMP identifier) of the session tuple in either the public realm or the private realm." ::= { natSessionEntry 19 } natSessionMaxIdleTime OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The max time for which this session can be idle without detecting a packet." ::= { natSessionEntry 20 } natSessionCurrentIdleTime OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The time since a packet belonging to this session was last detected." Perreault, et al. Expires August 25, 2013 [Page 41] Internet-Draft NEW NAT MIB February 2013 ::= { natSessionEntry 21 } natSessionInTranslates OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The number of inbound packets that were translated for this session. Discontinuities in the value of this counter can occur at reinitialization of the management system and at other times, as indicated by the value of ifCounterDiscontinuityTime on the relevant interface." ::= { natSessionEntry 22 } natSessionOutTranslates OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The number of outbound packets that were translated for this session. Discontinuities in the value of this counter can occur at reinitialization of the management system and at other times, as indicated by the value of ifCounterDiscontinuityTime on the relevant interface." ::= { natSessionEntry 23 } -- -- The Protocol table -- natProtocolTable OBJECT-TYPE SYNTAX SEQUENCE OF NatProtocolEntry MAX-ACCESS not-accessible STATUS deprecated DESCRIPTION "The (conceptual) table containing per protocol NAT statistics." ::= { natMIBObjects 10 } natProtocolEntry OBJECT-TYPE SYNTAX NatProtocolEntry MAX-ACCESS not-accessible STATUS deprecated DESCRIPTION Perreault, et al. Expires August 25, 2013 [Page 42] Internet-Draft NEW NAT MIB February 2013 "An entry (conceptual row) containing NAT statistics pertaining to a particular protocol." INDEX { natProtocol } ::= { natProtocolTable 1 } NatProtocolEntry ::= SEQUENCE { natProtocol NatProtocolType, natProtocolInTranslates Counter64, natProtocolOutTranslates Counter64, natProtocolDiscards Counter64 } natProtocol OBJECT-TYPE SYNTAX NatProtocolType MAX-ACCESS not-accessible STATUS deprecated DESCRIPTION "This object represents the protocol pertaining to which parameters are reported." ::= { natProtocolEntry 1 } natProtocolInTranslates OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The number of inbound packets pertaining to the protocol identified by natProtocol that underwent NAT. Discontinuities in the value of this counter can occur at reinitialization of the management system and at other times, as indicated by the value of ifCounterDiscontinuityTime on the relevant interface." ::= { natProtocolEntry 2 } natProtocolOutTranslates OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The number of outbound packets pertaining to the protocol identified by natProtocol that underwent NAT. Discontinuities in the value of this counter can occur at reinitialization of the management system and at other times, as indicated by the value of ifCounterDiscontinuityTime on the relevant interface." ::= { natProtocolEntry 3 } Perreault, et al. Expires August 25, 2013 [Page 43] Internet-Draft NEW NAT MIB February 2013 natProtocolDiscards OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The number of packets pertaining to the protocol identified by natProtocol that had to be rejected/dropped due to lack of resources. These rejections could be due to session timeout, resource unavailability, lack of address space, etc. Discontinuities in the value of this counter can occur at reinitialization of the management system and at other times, as indicated by the value of ifCounterDiscontinuityTime on the relevant interface." ::= { natProtocolEntry 4 } -- -- Notifications section -- natMIBNotifications OBJECT IDENTIFIER ::= { natMIB 0 } -- -- Notifications -- natPacketDiscard NOTIFICATION-TYPE OBJECTS { ifIndex } STATUS deprecated DESCRIPTION "This notification is generated when IP packets are discarded by the NAT function; e.g., due to lack of mapping space when NAT is out of addresses or ports. Note that the generation of natPacketDiscard notifications is throttled by the agent, as specified by the 'natNotifThrottlingInterval' object." ::= { natMIBNotifications 1 } natNotifPoolWatermarkLow NOTIFICATION-TYPE OBJECTS { natPoolIndex } STATUS current DESCRIPTION "This notification is generated when the specified pool's number of free addresses becomes lower than or equal to the specified threshold. The threshold is specified by the natPoolWatermarkLow object" Perreault, et al. Expires August 25, 2013 [Page 44] Internet-Draft NEW NAT MIB February 2013 ::= { natMIBNotifications 2 } natNotifPoolWatermarkHigh NOTIFICATION-TYPE OBJECTS { natPoolIndex } STATUS current DESCRIPTION "This notification is generated when the specified pool's number of free addresses becomes greater than or equal to the specified threshold. The threshold is specified by the natPoolWatermarkHigh object" ::= { natMIBNotifications 3 } natNotifMappings NOTIFICATION-TYPE OBJECTS { natCntMappings } STATUS current DESCRIPTION "This notification is generated when natCntMappings exceeds the value of natMappingsNotifyThreshold." ::= { natMIBNotifications 4 } natNotifAddrMappings NOTIFICATION-TYPE OBJECTS { natCntAddressMappings } STATUS current DESCRIPTION "This notification is generated when natCntAddressMappings exceeds the value of natAddrMapNotifyThreshold." ::= { natMIBNotifications 5 } natNotifSubscriberMappings NOTIFICATION-TYPE OBJECTS { natSubscriberCntMappings } STATUS current DESCRIPTION "This notification is generated when natSubscriberCntMappings exceeds the value of natSubscriberMapNotifyThresh, unless natSubscriberMapNotifyThresh is zero.." ::= { NatNotifications 6 } -- -- Conformance information. -- natMIBConformance OBJECT IDENTIFIER ::= { natMIB 2 } natMIBGroups OBJECT IDENTIFIER ::= { natMIBConformance 1 } natMIBCompliances OBJECT IDENTIFIER ::= { natMIBConformance 2 } Perreault, et al. Expires August 25, 2013 [Page 45] Internet-Draft NEW NAT MIB February 2013 -- -- Units of conformance -- natConfigGroup OBJECT-GROUP OBJECTS { natInterfaceRealm, natInterfaceServiceType, natInterfaceStorageType, natInterfaceRowStatus, natAddrMapName, natAddrMapEntryType, natAddrMapTranslationEntity, natAddrMapLocalAddrType, natAddrMapLocalAddrFrom, natAddrMapLocalAddrTo, natAddrMapLocalPortFrom, natAddrMapLocalPortTo, natAddrMapGlobalAddrType, natAddrMapGlobalAddrFrom, natAddrMapGlobalAddrTo, natAddrMapGlobalPortFrom, natAddrMapGlobalPortTo, natAddrMapProtocol, natAddrMapStorageType, natAddrMapRowStatus, natBindDefIdleTimeout, natUdpDefIdleTimeout, natIcmpDefIdleTimeout, natOtherDefIdleTimeout, natTcpDefIdleTimeout, natTcpDefNegTimeout, natNotifThrottlingInterval } STATUS deprecated DESCRIPTION "A collection of configuration-related information required to support management of devices supporting NAT." ::= { natMIBGroups 1 } natTranslationGroup OBJECT-GROUP OBJECTS { natAddrBindNumberOfEntries, natAddrBindGlobalAddrType, natAddrBindGlobalAddr, natAddrBindId, natAddrBindTranslationEntity, natAddrBindType, natAddrBindMapIndex, natAddrBindSessions, Perreault, et al. Expires August 25, 2013 [Page 46] Internet-Draft NEW NAT MIB February 2013 natAddrBindMaxIdleTime, natAddrBindCurrentIdleTime, natAddrBindInTranslates, natAddrBindOutTranslates, natAddrPortBindNumberOfEntries, natAddrPortBindGlobalAddrType, natAddrPortBindGlobalAddr, natAddrPortBindGlobalPort, natAddrPortBindId, natAddrPortBindTranslationEntity, natAddrPortBindType, natAddrPortBindMapIndex, natAddrPortBindSessions, natAddrPortBindMaxIdleTime, natAddrPortBindCurrentIdleTime, natAddrPortBindInTranslates, natAddrPortBindOutTranslates, natSessionPrivateSrcEPBindId, natSessionPrivateSrcEPBindMode, natSessionPrivateDstEPBindId, natSessionPrivateDstEPBindMode, natSessionDirection, natSessionUpTime, natSessionAddrMapIndex, natSessionProtocolType, natSessionPrivateAddrType, natSessionPrivateSrcAddr, natSessionPrivateSrcPort, natSessionPrivateDstAddr, natSessionPrivateDstPort, natSessionPublicAddrType, natSessionPublicSrcAddr, natSessionPublicSrcPort, natSessionPublicDstAddr, natSessionPublicDstPort, natSessionMaxIdleTime, natSessionCurrentIdleTime, natSessionInTranslates, natSessionOutTranslates } STATUS deprecated DESCRIPTION "A collection of BIND-related objects required to support management of devices supporting NAT." ::= { natMIBGroups 2 } natStatsInterfaceGroup OBJECT-GROUP OBJECTS { natInterfaceInTranslates, Perreault, et al. Expires August 25, 2013 [Page 47] Internet-Draft NEW NAT MIB February 2013 natInterfaceOutTranslates, natInterfaceDiscards } STATUS deprecated DESCRIPTION "A collection of NAT statistics associated with the interface on which NAT is configured, to aid troubleshooting/monitoring of the NAT operation." ::= { natMIBGroups 3 } natStatsProtocolGroup OBJECT-GROUP OBJECTS { natProtocolInTranslates, natProtocolOutTranslates, natProtocolDiscards } STATUS deprecated DESCRIPTION "A collection of protocol specific NAT statistics, to aid troubleshooting/monitoring of NAT operation." ::= { natMIBGroups 4 } natStatsAddrMapGroup OBJECT-GROUP OBJECTS { natAddrMapInTranslates, natAddrMapOutTranslates, natAddrMapDiscards, natAddrMapAddrUsed } STATUS deprecated DESCRIPTION "A collection of address map specific NAT statistics, to aid troubleshooting/monitoring of NAT operation." ::= { natMIBGroups 5 } natMIBNotificationGroup NOTIFICATION-GROUP NOTIFICATIONS { natPacketDiscard } STATUS deprecated DESCRIPTION "A collection of notifications generated by devices supporting this MIB." ::= { natMIBGroups 6 } natGroupBasicObjects OBJECT-GROUP OBJECTS { natCntTranslates, natCntOOP, natCntResource, natCntStateMismatch, natCntQuota, natCntMappings, natCntMapCreations, natCntMapRemovals, natCntProtocolTranslates, Perreault, et al. Expires August 25, 2013 [Page 48] Internet-Draft NEW NAT MIB February 2013 natCntProtocolOOP, natCntProtocolResource, natCntProtocolStateMismatch, natCntProtocolQuota, natCntProtocolMappings, natCntProtocolMapCreations, natCntProtocolMapRemovals, natLimitMappings, natMappingsNotifyThreshold, natPoolIndex, natPoolRealm, natPoolUsage, natPoolWatermarkLow, natPoolWatermarkHigh, natPoolPortMin, natPoolPortMax, natPoolRangePoolIndex, natPoolRangeEnd, natPoolRangeAllocatedPorts, natMappingIntRealm, natMappingIntAddressType, natMappingIntAddress, natMappingIntPort, natMappingPool, natMappingMapBehavior, natMappingFilterBehavior, natMappingAddressPooling } STATUS current DESCRIPTION "Basic counters, limits, and thresholds." ::= { natMIBGroups 7 } natGroupAddrMapObjects OBJECT-GROUP OBJECTS { natCntAddressMappings, natCntAddrMapCreations, natCntAddrMapRemovals, natLimitAddressMappings, natAddrMapNotifyThreshold, natMapIntAddrExtRealm, natMapIntAddrExt } STATUS current DESCRIPTION "Objects that require 'Paired IP address pooling' behavior [RFC4787]." ::= { natMIBGroups 8 } natGroupFragmentObjects OBJECT-GROUP OBJECTS { natLimitFragments } Perreault, et al. Expires August 25, 2013 [Page 49] Internet-Draft NEW NAT MIB February 2013 STATUS current DESCRIPTION "Objects that require 'Receive Fragments Out of Order' behavior [RFC4787]." ::= { natMIBGroups 9 } natGroupBasicNotifications NOTIFICATION-GROUP NOTIFICATIONS { natNotifPoolWatermarkLow, natNotifPoolWatermarkHigh, natNotifMappings } STATUS current DESCRIPTION "Basic notifications." ::= { natMIBGroups 11 } natGroupAddrMapNotifications NOTIFICATION-GROUP NOTIFICATIONS { natNotifAddrMappings } STATUS current DESCRIPTION "Notifications about address mappings." ::= { natMIBGroups 12 } natGroupSubscriberObjects OBJECT-GROUP OBJECTS { natSubscriberIntPrefixType, natSubscriberIntPrefix, natSubscriberIntPrefixLength, natSubscriberPool, natSubscriberCntTranslates, natSubscriberCntOOP, natSubscriberCntResource, natSubscriberCntStateMismatch, natSubscriberCntQuota, natSubscriberCntMappings, natSubscriberCntMapCreations, natSubscriberCntMapRemovals, natSubscriberLimitMappings, natLimitSubscribers } STATUS current DESCRIPTION "Per-subscriber counters, limits, and thresholds." ::= { natMIBGroups 13 } natGroupSubscriberNotifications NOTIFICATION-GROUP NOTIFICATIONS { natSubscriberMapNotifyThresh } STATUS current DESCRIPTION "Subscriber notifications." Perreault, et al. Expires August 25, 2013 [Page 50] Internet-Draft NEW NAT MIB February 2013 ::= { natMIBGroups 14 } -- -- Compliance statements -- natMIBFullCompliance MODULE-COMPLIANCE STATUS deprecated DESCRIPTION "When this MIB is implemented with support for read-create, then such an implementation can claim full compliance. Such devices can then be both monitored and configured with this MIB. The following index objects cannot be added as OBJECT clauses but nevertheless have the compliance requirements: " -- OBJECT natAddrBindLocalAddrType -- SYNTAX InetAddressType { ipv4(1), ipv6(2) } -- DESCRIPTION -- "An implementation is required to support -- global IPv4 and/or IPv6 addresses, depending -- on its support for IPv4 and IPv6." -- OBJECT natAddrBindLocalAddr -- SYNTAX InetAddress (SIZE(4|16)) -- DESCRIPTION -- "An implementation is required to support -- global IPv4 and/or IPv6 addresses, depending -- on its support for IPv4 and IPv6." -- OBJECT natAddrPortBindLocalAddrType -- SYNTAX InetAddressType { ipv4(1), ipv6(2) } -- DESCRIPTION -- "An implementation is required to support -- global IPv4 and/or IPv6 addresses, depending -- on its support for IPv4 and IPv6." -- OBJECT natAddrPortBindLocalAddr -- SYNTAX InetAddress (SIZE(4|16)) -- DESCRIPTION -- "An implementation is required to support -- global IPv4 and/or IPv6 addresses, depending -- on its support for IPv4 and IPv6." MODULE IF-MIB -- The interfaces MIB, RFC2863 MANDATORY-GROUPS { ifCounterDiscontinuityGroup Perreault, et al. Expires August 25, 2013 [Page 51] Internet-Draft NEW NAT MIB February 2013 } MODULE -- this module MANDATORY-GROUPS { natConfigGroup, natTranslationGroup, natStatsInterfaceGroup } GROUP natStatsProtocolGroup DESCRIPTION "This group is optional." GROUP natStatsAddrMapGroup DESCRIPTION "This group is optional." GROUP natMIBNotificationGroup DESCRIPTION "This group is optional." OBJECT natAddrMapLocalAddrType SYNTAX InetAddressType { ipv4(1), ipv6(2) } DESCRIPTION "An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natAddrMapLocalAddrFrom SYNTAX InetAddress (SIZE(4|16)) DESCRIPTION "An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natAddrMapLocalAddrTo SYNTAX InetAddress (SIZE(4|16)) DESCRIPTION "An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natAddrMapGlobalAddrType SYNTAX InetAddressType { ipv4(1), ipv6(2) } DESCRIPTION "An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natAddrMapGlobalAddrFrom SYNTAX InetAddress (SIZE(4|16)) DESCRIPTION "An implementation is required to support global IPv4 Perreault, et al. Expires August 25, 2013 [Page 52] Internet-Draft NEW NAT MIB February 2013 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natAddrMapGlobalAddrTo SYNTAX InetAddress (SIZE(4|16)) DESCRIPTION "An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natAddrBindGlobalAddrType SYNTAX InetAddressType { ipv4(1), ipv6(2) } DESCRIPTION "An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natAddrBindGlobalAddr SYNTAX InetAddress (SIZE(4|16)) DESCRIPTION "An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natAddrPortBindGlobalAddrType SYNTAX InetAddressType { ipv4(1), ipv6(2) } DESCRIPTION "An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natAddrPortBindGlobalAddr SYNTAX InetAddress (SIZE(4|16)) DESCRIPTION "An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natSessionPrivateAddrType SYNTAX InetAddressType { ipv4(1), ipv6(2) } DESCRIPTION "An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natSessionPrivateSrcAddr SYNTAX InetAddress (SIZE(4|16)) DESCRIPTION Perreault, et al. Expires August 25, 2013 [Page 53] Internet-Draft NEW NAT MIB February 2013 "An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natSessionPrivateDstAddr SYNTAX InetAddress (SIZE(4|16)) DESCRIPTION "An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natSessionPublicAddrType SYNTAX InetAddressType { ipv4(1), ipv6(2) } DESCRIPTION "An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natSessionPublicSrcAddr SYNTAX InetAddress (SIZE(4|16)) DESCRIPTION "An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natSessionPublicDstAddr SYNTAX InetAddress (SIZE(4|16)) DESCRIPTION "An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." ::= { natMIBCompliances 1 } natMIBReadOnlyCompliance MODULE-COMPLIANCE STATUS deprecated DESCRIPTION "When this MIB is implemented without support for read-create (i.e., in read-only mode), then such an implementation can claim read-only compliance. Such a device can then be monitored but cannot be configured with this MIB. The following index objects cannot be added as OBJECT clauses but nevertheless have the compliance requirements: " Perreault, et al. Expires August 25, 2013 [Page 54] Internet-Draft NEW NAT MIB February 2013 -- OBJECT natAddrBindLocalAddrType -- SYNTAX InetAddressType { ipv4(1), ipv6(2) } -- DESCRIPTION -- "An implementation is required to support -- global IPv4 and/or IPv6 addresses, depending -- on its support for IPv4 and IPv6." -- OBJECT natAddrBindLocalAddr -- SYNTAX InetAddress (SIZE(4|16)) -- DESCRIPTION -- "An implementation is required to support -- global IPv4 and/or IPv6 addresses, depending -- on its support for IPv4 and IPv6." -- OBJECT natAddrPortBindLocalAddrType -- SYNTAX InetAddressType { ipv4(1), ipv6(2) } -- DESCRIPTION -- "An implementation is required to support -- global IPv4 and/or IPv6 addresses, depending -- on its support for IPv4 and IPv6." -- OBJECT natAddrPortBindLocalAddr -- SYNTAX InetAddress (SIZE(4|16)) -- DESCRIPTION -- "An implementation is required to support -- global IPv4 and/or IPv6 addresses, depending -- on its support for IPv4 and IPv6." MODULE IF-MIB -- The interfaces MIB, RFC2863 MANDATORY-GROUPS { ifCounterDiscontinuityGroup } MODULE -- this module MANDATORY-GROUPS { natConfigGroup, natTranslationGroup, natStatsInterfaceGroup } GROUP natStatsProtocolGroup DESCRIPTION "This group is optional." GROUP natStatsAddrMapGroup DESCRIPTION "This group is optional." GROUP natMIBNotificationGroup DESCRIPTION "This group is optional." OBJECT natInterfaceRowStatus SYNTAX RowStatus { active(1) } Perreault, et al. Expires August 25, 2013 [Page 55] Internet-Draft NEW NAT MIB February 2013 MIN-ACCESS read-only DESCRIPTION "Write access is not required, and active is the only status that needs to be supported." OBJECT natAddrMapLocalAddrType SYNTAX InetAddressType { ipv4(1), ipv6(2) } MIN-ACCESS read-only DESCRIPTION "Write access is not required. An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natAddrMapLocalAddrFrom SYNTAX InetAddress (SIZE(4|16)) MIN-ACCESS read-only DESCRIPTION "Write access is not required. An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natAddrMapLocalAddrTo SYNTAX InetAddress (SIZE(4|16)) MIN-ACCESS read-only DESCRIPTION "Write access is not required. An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natAddrMapGlobalAddrType SYNTAX InetAddressType { ipv4(1), ipv6(2) } MIN-ACCESS read-only DESCRIPTION "Write access is not required. An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natAddrMapGlobalAddrFrom SYNTAX InetAddress (SIZE(4|16)) MIN-ACCESS read-only DESCRIPTION "Write access is not required. An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natAddrMapGlobalAddrTo SYNTAX InetAddress (SIZE(4|16)) MIN-ACCESS read-only Perreault, et al. Expires August 25, 2013 [Page 56] Internet-Draft NEW NAT MIB February 2013 DESCRIPTION "Write access is not required. An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natAddrMapRowStatus SYNTAX RowStatus { active(1) } MIN-ACCESS read-only DESCRIPTION "Write access is not required, and active is the only status that needs to be supported." OBJECT natAddrBindGlobalAddrType SYNTAX InetAddressType { ipv4(1), ipv6(2) } DESCRIPTION "An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natAddrBindGlobalAddr SYNTAX InetAddress (SIZE(4|16)) DESCRIPTION "An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natAddrPortBindGlobalAddrType SYNTAX InetAddressType { ipv4(1), ipv6(2) } DESCRIPTION "An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natAddrPortBindGlobalAddr SYNTAX InetAddress (SIZE(4|16)) DESCRIPTION "An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natSessionPrivateAddrType SYNTAX InetAddressType { ipv4(1), ipv6(2) } DESCRIPTION "An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natSessionPrivateSrcAddr Perreault, et al. Expires August 25, 2013 [Page 57] Internet-Draft NEW NAT MIB February 2013 SYNTAX InetAddress (SIZE(4|16)) DESCRIPTION "An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natSessionPrivateDstAddr SYNTAX InetAddress (SIZE(4|16)) DESCRIPTION "An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natSessionPublicAddrType SYNTAX InetAddressType { ipv4(1), ipv6(2) } DESCRIPTION "An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natSessionPublicSrcAddr SYNTAX InetAddress (SIZE(4|16)) DESCRIPTION "An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." OBJECT natSessionPublicDstAddr SYNTAX InetAddress (SIZE(4|16)) DESCRIPTION "An implementation is required to support global IPv4 and/or IPv6 addresses, depending on its support for IPv4 and IPv6." ::= { natMIBCompliances 2 } natBasicCompliance MODULE-COMPLIANCE STATUS current DESCRIPTION "Basic compliance with this MIB is attained when the objects contained in the mandatory groups are implemented." MODULE -- this module MANDATORY-GROUPS { natGroupBasicObjects, natGroupBasicNotifications } ::= { natMIBCompliances 3 } natAddrMapCompliance MODULE-COMPLIANCE STATUS current Perreault, et al. Expires August 25, 2013 [Page 58] Internet-Draft NEW NAT MIB February 2013 DESCRIPTION "NATs that have 'Paired IP address pooling' behavior [RFC4787] and implement the objects in this group can claim this level of compliance." MODULE -- this module MANDATORY-GROUPS { natGroupBasicObjects, natGroupBasicNotifications, natGroupAddrMapObjects, natGroupAddrMapNotifications } ::= { natMIBCompliances 4 } natFragmentsCompliance MODULE-COMPLIANCE STATUS current DESCRIPTION "NATs that have 'Receive Fragments Out of Order' behavior [RFC4787] and implement the objects in this group can claim this level of compliance." MODULE -- this module MANDATORY-GROUPS { natGroupBasicObjects, natGroupBasicNotifications, natGroupFragmentObjects } ::= { natMIBCompliances 5 } natCGNCompliance MODULE-COMPLIANCE STATUS current DESCRIPTION "NATs that have 'Paired IP address pooling' and 'Receive Fragments Out of Order' behavior [RFC4787] and implement the objects in this group can claim this level of compliance. This level of compliance is to be expected of a CGN compliant with [I-D.ietf-behave-lsn-requiremnents]." MODULE -- this module MANDATORY-GROUPS { natGroupBasicObjects, natGroupBasicNotifications, natGroupAddrMapObjects, natGroupAddrMapNotifications, natGroupFragmentObjects, natGroupSubscriberObjects, natGroupSubscriberNotifications } ::= { natMIBCompliances 6 } -- counters natCounters OBJECT IDENTIFIER ::= { natMIBObjects 11 } natCntTranslates OBJECT-TYPE SYNTAX Counter64 Perreault, et al. Expires August 25, 2013 [Page 59] Internet-Draft NEW NAT MIB February 2013 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of packets to which NAT has been applied." ::= { natCounters 1 } natCntOOP OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of packets to which NAT could not be applied because no external port was available, excluding quota limitations." ::= { natCounters 2 } natCntResource OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of packets to which NAT could not be applied because of resource constraints (excluding out-of-ports condition)." ::= { natCounters 3 } natCntStateMismatch OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of packets to which NAT could not be applied because of mapping state mismatch. For example, a TCP packet that matches an existing mapping but is dropped because its flags are incompatible with the current state of the mapping would cause this counter to be incremented." ::= { natCounters 4 } natCntQuota OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of packets to which NAT could not be applied because of quota limitations. Quotas include absolute limits as well as limits on rate of allocation." ::= { natCounters 5 } natCntMappings OBJECT-TYPE SYNTAX Gauge32 Perreault, et al. Expires August 25, 2013 [Page 60] Internet-Draft NEW NAT MIB February 2013 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of currently active mappings. Equal to natCntMapRemovals - natCntMapCreations." ::= { natCounters 6 } natCntMapCreations OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of mapping creations. This includes static mappings." ::= { natCounters 7 } natCntMapRemovals OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of mapping removals. This includes static mappings." ::= { natCounters 8 } natCntAddressMappings OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of active address mappings. Equal to natCntAddrMapRemovals - natCntAddrMapCreations." ::= { natCounters 9 } natCntAddrMapCreations OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of address mapping creations. This includes static mappings." ::= { natCounters 10 } natCntAddrMapRemovals OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION Perreault, et al. Expires August 25, 2013 [Page 61] Internet-Draft NEW NAT MIB February 2013 "Number of address mapping removals. This includes static mappings." ::= { natCounters 11 } natCntProtocolTable OBJECT-TYPE SYNTAX SEQUENCE OF NatCntProtocolEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "Table of protocols with per-protocol counters." ::= { natCounters 128 } natCntProtocolEntry OBJECT-TYPE SYNTAX NatCntProtocolEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "Per-protocol counters." INDEX { natCntProtocolNumber } ::= { natCntProtocolTable 1 } NatCntProtocolEntry ::= SEQUENCE { natCntProtocolNumber ProtocolNumber, natCntProtocolTranslates Counter64, natCntProtocolOOP Counter64, natCntProtocolResource Counter64, natCntProtocolStateMismatch Counter64, natCntProtocolQuota Counter64, natCntProtocolMappings Gauge32, natCntProtocolMapCreations Counter64, natCntProtocolMapRemovals Counter64 } natCntProtocolNumber OBJECT-TYPE SYNTAX ProtocolNumber MAX-ACCESS not-accessible STATUS current DESCRIPTION "Counters in this conceptual row apply to packets using the transport protocol identified by this object's value." ::= { natCntProtocolEntry 1 } natCntProtocolTranslates OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION Perreault, et al. Expires August 25, 2013 [Page 62] Internet-Draft NEW NAT MIB February 2013 "The number of packets to which NAT has been applied." ::= { natCntProtocolEntry 2 } natCntProtocolOOP OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of packets to which NAT could not be applied because no external port was available." ::= { natCntProtocolEntry 3 } natCntProtocolResource OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of packets to which NAT could not be applied because of resource constraints (excluding out-of-ports condition)." ::= { natCntProtocolEntry 4 } natCntProtocolStateMismatch OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of packets to which NAT could not be applied because of state table mismatch. For example, a TCP packet that matches an existing mapping but is dropped because its flags are incompatible with the current state of the mapping would cause this counter to be incremented." ::= { natCntProtocolEntry 5 } natCntProtocolQuota OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of packets to which NAT could not be applied because of exceeded quotas. Quotas include absolute limits as well as limits on rate of allocation." ::= { natCntProtocolEntry 6 } natCntProtocolMappings OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION Perreault, et al. Expires August 25, 2013 [Page 63] Internet-Draft NEW NAT MIB February 2013 "Number of active mappings. Equal to natCntMapRemovals - natCntMapCreations." ::= { natCntProtocolEntry 7 } natCntProtocolMapCreations OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of mapping creations. This includes static mappings." ::= { natCntProtocolEntry 8 } natCntProtocolMapRemovals OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of mapping removals. This includes statis mappings." ::= { natCntProtocolEntry 9 } -- limits natLimits OBJECT IDENTIFIER ::= { natMIBObjects 12 } natLimitMappings OBJECT-TYPE SYNTAX Unsigned32 MAX-ACCESS read-write STATUS current DESCRIPTION "Global limit on the total number of mappings. Zero means unlimited." ::= { natLimits 1 } natMappingsNotifyThreshold OBJECT-TYPE SYNTAX Unsigned32 MAX-ACCESS read-write STATUS current DESCRIPTION "See natNotifMappings." ::= { natLimits 2 } natLimitAddressMappings OBJECT-TYPE SYNTAX Unsigned32 MAX-ACCESS read-write STATUS current DESCRIPTION Perreault, et al. Expires August 25, 2013 [Page 64] Internet-Draft NEW NAT MIB February 2013 "Global limit on the total number of internal-to-external address mappings. Zero means unlimited. This limit is only applicable to NATs that have an 'IP address pooling' behavior of 'Paired' [RFC4787]." ::= { natLimits 3 } natAddrMapNotifyThreshold OBJECT-TYPE SYNTAX Unsigned32 MAX-ACCESS read-write STATUS current DESCRIPTION "See natNotifAddrMappings." ::= { natLimits 4 } natLimitFragments OBJECT-TYPE SYNTAX Unsigned32 MAX-ACCESS read-write STATUS current DESCRIPTION "Global limit on the total number of fragments pending reassembly. Zero means unlimited. This limit is only applicable to NATs having 'Receive Fragments Out of Order' behavior [RFC4787]." ::= { natLimits 5 } natLimitSubscribers OBJECT-TYPE SYNTAX Unsigned32 MAX-ACCESS read-write STATUS current DESCRIPTION "Global limit on the number of subscribers with active mappings. Zero means unlimited." ::= { natLimits 6 } -- pools natPoolObjects OBJECT IDENTIFIER ::= { natMIBObjects 13 } natPoolTable OBJECT-TYPE SYNTAX SEQUENCE OF NatPoolEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "Table of pools." Perreault, et al. Expires August 25, 2013 [Page 65] Internet-Draft NEW NAT MIB February 2013 ::= { natPoolObjects 1 } natPoolEntry OBJECT-TYPE SYNTAX NatPoolEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "Entry in the table of pools." INDEX { natPoolIndex } ::= { natPoolTable 1 } NatPoolEntry ::= SEQUENCE { natPoolIndex NatPoolId, natPoolRealm SnmpAdminString, natPoolUsage Integer32, natPoolWatermarkLow Integer32, natPoolWatermarkHigh Integer32, natPoolPortMin InetPortNumber, natPoolPortMax InetPortNumber } natPoolIndex OBJECT-TYPE SYNTAX NatPoolId MAX-ACCESS read-only STATUS current DESCRIPTION "Index of an address pool." ::= { natPoolEntry 1 } natPoolRealm OBJECT-TYPE SYNTAX SnmpAdminString (SIZE (0..32)) MAX-ACCESS read-only STATUS current DESCRIPTION "Realm to which this pool's addresses belong." ::= { natPoolEntry 2 } natPoolUsage OBJECT-TYPE SYNTAX Integer32 (0..100) MAX-ACCESS read-only STATUS current DESCRIPTION "Percentage of the pool's total number of external ports currently mapped." ::= { natPoolEntry 3 } natPoolWatermarkLow OBJECT-TYPE Perreault, et al. Expires August 25, 2013 [Page 66] Internet-Draft NEW NAT MIB February 2013 SYNTAX Integer32 (-1|0..100) MAX-ACCESS read-create STATUS current DESCRIPTION "Low watermark on a pool's usage, in percentage of the total number of ports available. If set to -1, the watermark is disabled. Otherwise when natPoolUsage becomes lower than or equal to natPoolWatermarkLow, a notification is sent. The NAT may also start behaving in low usage mode (this is implementation-defined)." ::= { natPoolEntry 4 } natPoolWatermarkHigh OBJECT-TYPE SYNTAX Integer32 (-1|0..100) MAX-ACCESS read-create STATUS current DESCRIPTION "High watermark on a pool's usage, in percentage of the total number of ports available. If set to -1, the watermark is disabled. Otherwise, when natPoolUsage becomes higher than or equal to natPoolWatermarkHigh, a notification is sent. The NAT may also start behaving in high usage mode (this is implementation-defined)." ::= { natPoolEntry 5 } natPoolPortMin OBJECT-TYPE SYNTAX InetPortNumber MAX-ACCESS read-create STATUS current DESCRIPTION "Minimal port number to be allocated in this pool." ::= { natPoolEntry 6 } natPoolPortMax OBJECT-TYPE SYNTAX InetPortNumber MAX-ACCESS read-create STATUS current DESCRIPTION "Maximal port number to be allocated in this pool." ::= { natPoolEntry 7 } natPoolRangeTable OBJECT-TYPE SYNTAX SEQUENCE OF NatPoolRangeEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "This table contains address ranges used by pool entries." Perreault, et al. Expires August 25, 2013 [Page 67] Internet-Draft NEW NAT MIB February 2013 ::= { natPoolObjects 2 } natPoolRangeEntry OBJECT-TYPE SYNTAX NatPoolRangeEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "NAT pool address range." INDEX { natPoolRangeType, natPoolRangeBegin } ::= { natPoolRangeTable 1 } NatPoolRangeEntry ::= SEQUENCE { natPoolRangePoolIndex NatPoolId, natPoolRangeType InetAddressType, natPoolRangeBegin InetAddress, natPoolRangeEnd InetAddress, natPoolRangeAllocatedPorts Gauge32 } natPoolRangePoolIndex OBJECT-TYPE SYNTAX NatPoolId MAX-ACCESS read-only STATUS current DESCRIPTION "Index of the address pool to which this address range belongs. See natPoolIndex." ::= { natPoolRangeEntry 1 } natPoolRangeType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS not-accessible STATUS current DESCRIPTION "The address type of natPoolRangeBegin and natPoolRangeEnd." ::= { natPoolRangeEntry 2 } natPoolRangeBegin OBJECT-TYPE SYNTAX InetAddress (SIZE (4|16)) MAX-ACCESS not-accessible STATUS current DESCRIPTION "Lowest address included in this range." ::= { natPoolRangeEntry 3 } natPoolRangeEnd OBJECT-TYPE Perreault, et al. Expires August 25, 2013 [Page 68] Internet-Draft NEW NAT MIB February 2013 SYNTAX InetAddress (SIZE (4|16)) MAX-ACCESS read-only STATUS current DESCRIPTION "Highest address included in this range." ::= { natPoolRangeEntry 4 } natPoolRangeAllocatedPorts OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of ports currently allocated on the addresses in this range." ::= { natPoolRangeEntry 5 } -- indexed mapping tables natMapObjects OBJECT IDENTIFIER ::= { natMIBObjects 14 } natMapIntAddrTable OBJECT-TYPE SYNTAX SEQUENCE OF NatMapIntAddrEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "Table of mappings from internal to external address. This table is only applicable to NATs that have an 'IP address pooling' behavior of 'Paired' [RFC4787]." ::= { natMapObjects 1 } natMapIntAddrEntry OBJECT-TYPE SYNTAX NatMapIntAddrEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "Mapping from internal to external address." INDEX { natMapIntAddrIntRealm, natMapIntAddrType, natMapIntAddrInt } ::= { natMapIntAddrTable 1 } NatMapIntAddrEntry ::= SEQUENCE { natMapIntAddrIntRealm SnmpAdminString, natMapIntAddrExtRealm SnmpAdminString, natMapIntAddrType InetAddressType, Perreault, et al. Expires August 25, 2013 [Page 69] Internet-Draft NEW NAT MIB February 2013 natMapIntAddrInt InetAddress, natMapIntAddrExt InetAddress } natMapIntAddrIntRealm OBJECT-TYPE SYNTAX SnmpAdminString (SIZE(0..32)) MAX-ACCESS not-accessible STATUS current DESCRIPTION "Realm to which natMapIntAddrInt belongs." ::= { natMapIntAddrEntry 1 } natMapIntAddrExtRealm OBJECT-TYPE SYNTAX SnmpAdminString MAX-ACCESS read-only STATUS current DESCRIPTION "Realm to which natMapIntAddrExt belongs." ::= { natMapIntAddrEntry 2 } natMapIntAddrType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS not-accessible STATUS current DESCRIPTION "Address type for natMapIntAddrInt and natMapIntAddrExt." ::= { natMapIntAddrEntry 3 } natMapIntAddrInt OBJECT-TYPE SYNTAX InetAddress (SIZE (4|16)) MAX-ACCESS not-accessible STATUS current DESCRIPTION "Internal address." ::= { natMapIntAddrEntry 4 } natMapIntAddrExt OBJECT-TYPE SYNTAX InetAddress MAX-ACCESS read-only STATUS current DESCRIPTION "External address." ::= { natMapIntAddrEntry 5 } natMappingTable OBJECT-TYPE SYNTAX SEQUENCE OF NatMappingTableEntry MAX-ACCESS not-accessible STATUS current Perreault, et al. Expires August 25, 2013 [Page 70] Internet-Draft NEW NAT MIB February 2013 DESCRIPTION "Table of mappings indexed by external 3-tuple." ::= { natMapObjects 2 } natMappingTableEntry OBJECT-TYPE SYNTAX NatMappingTableEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "A single NAT mapping." INDEX { natMappingProto, natMappingExtRealm, natMappingExtAddressType, natMappingExtAddress, natMappingExtPort } ::= { natMappingTable 1 } NatMappingTableEntry ::= SEQUENCE { natMappingProto ProtocolNumber, natMappingExtRealm SnmpAdminString, natMappingExtAddressType InetAddressType, natMappingExtAddress InetAddress, natMappingExtPort InetPortNumber, natMappingIntRealm SnmpAdminString, natMappingIntAddressType InetAddressType, natMappingIntAddress InetAddress, natMappingIntPort InetPortNumber, natMappingPool NatPoolId, natMappingMapBehavior NatBehaviorType, natMappingFilterBehavior NatBehaviorType, natMappingAddressPooling NatPoolingType } natMappingProto OBJECT-TYPE SYNTAX ProtocolNumber MAX-ACCESS not-accessible STATUS current DESCRIPTION "The mapping's transport protocol number." ::= { natMappingTableEntry 1 } natMappingExtRealm OBJECT-TYPE SYNTAX SnmpAdminString (SIZE(0..32)) MAX-ACCESS not-accessible STATUS current DESCRIPTION "The realm to which natMappingExtAddress belongs." Perreault, et al. Expires August 25, 2013 [Page 71] Internet-Draft NEW NAT MIB February 2013 ::= { natMappingTableEntry 2 } natMappingExtAddressType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS not-accessible STATUS current DESCRIPTION "Type of the mapping's external address." ::= { natMappingTableEntry 3 } natMappingExtAddress OBJECT-TYPE SYNTAX InetAddress (SIZE (4|16)) MAX-ACCESS not-accessible STATUS current DESCRIPTION "The mapping's external address. If this is the undefined address, all external addresses are mapped to the internal address." ::= { natMappingTableEntry 4 } natMappingExtPort OBJECT-TYPE SYNTAX InetPortNumber MAX-ACCESS not-accessible STATUS current DESCRIPTION "The mapping's external port number. If this is zero, all external ports are mapped to the internal port." ::= { natMappingTableEntry 5 } natMappingIntRealm OBJECT-TYPE SYNTAX SnmpAdminString MAX-ACCESS read-only STATUS current DESCRIPTION "The realm to which natMappingIntAddress belongs." ::= { natMappingTableEntry 6 } natMappingIntAddressType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS read-only STATUS current DESCRIPTION "Type of the mapping's internal address." ::= { natMappingTableEntry 7 } natMappingIntAddress OBJECT-TYPE SYNTAX InetAddress MAX-ACCESS read-only Perreault, et al. Expires August 25, 2013 [Page 72] Internet-Draft NEW NAT MIB February 2013 STATUS current DESCRIPTION "The mapping's internal address. If this is the undefined address, addresses are not translated." ::= { natMappingTableEntry 8 } natMappingIntPort OBJECT-TYPE SYNTAX InetPortNumber MAX-ACCESS read-only STATUS current DESCRIPTION "The mapping's internal port number. If this is zero, ports are not translated." ::= { natMappingTableEntry 9 } natMappingPool OBJECT-TYPE SYNTAX NatPoolId (0|1..4294967295) MAX-ACCESS read-only STATUS current DESCRIPTION "Index of the pool that contains this mapping's external address and port. If zero, no pool is associated with this mapping." ::= { natMappingTableEntry 10 } natMappingMapBehavior OBJECT-TYPE SYNTAX NatBehaviorType MAX-ACCESS read-only STATUS current DESCRIPTION "Mapping behavior as described in [RFC4787] section 4.1." ::= { natMappingTableEntry 11 } natMappingFilterBehavior OBJECT-TYPE SYNTAX NatBehaviorType MAX-ACCESS read-only STATUS current DESCRIPTION "Filtering behavior as described in [RFC4787] section 5." ::= { natMappingTableEntry 12 } natMappingAddressPooling OBJECT-TYPE SYNTAX NatPoolingType MAX-ACCESS read-only STATUS current DESCRIPTION "Type of address pooling behavior that was used to create this mapping." ::= { natMappingTableEntry 13 } Perreault, et al. Expires August 25, 2013 [Page 73] Internet-Draft NEW NAT MIB February 2013 -- subscribers natSubscribers OBJECT IDENTIFIER ::= { NatObjects 5 } natSubscribersTable OBJECT-TYPE SYNTAX SEQUENCE OF natSubscribersTableEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "Table of CGN subscribers." ::= { natSubscribers 1 } natSubscribersTableEntry OBJECT-TYPE SYNTAX natSubscribersTableEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "Each entry describes a single CGN subscriber." INDEX { natSubscriberIdentifierType, natSubscriberIdentifier } ::= { natSubscribersTable 1 } natSubscribersTableEntry ::= SEQUENCE { natSubscriberIdentifierType InetAddressType, natSubscriberIdentifier InetAddress, natSubscriberIntPrefixType InetAddressType, natSubscriberIntPrefix InetAddress, natSubscriberIntPrefixLength InetAddressPrefixLength, natSubscriberPool NatPoolIndex, natSubscriberCntTranslates Counter64, natSubscriberCntOOP Counter64, natSubscriberCntResource Counter64, natSubscriberCntStateMismatch Counter64, natSubscriberCntQuota Counter64, natSubscriberCntMappings Gauge32, natSubscriberCntMapCreations Counter64, natSubscriberCntMapRemovals Counter64, natSubscriberLimitMappings Unsigned32, natSubscriberMapNotifyThresh Unsigned32 } natSubscriberIdentifierType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS not-accessible STATUS current DESCRIPTION "Address type of the subscriber identifier." Perreault, et al. Expires August 25, 2013 [Page 74] Internet-Draft NEW NAT MIB February 2013 ::= { natSubscribersTableEntry 1 } natSubscriberIdentifier OBJECT-TYPE SYNTAX InetAddress (SIZE (4|16)) MAX-ACCESS not-accessible STATUS current DESCRIPTION "Address used for uniquely identifying the subscriber. In traditional NAT, this is the internal address assigned to the CPE. In case an address range is assigned to a subscriber, the first address in the range is used as identifier. For tunnelled connectivity (e.g., DS-Lite [RFC6333]), the outer address is used as identifier (i.e., the IPv6 address in the case of DS-Lite)." ::= { natSubscribersTableEntry 2 } natSubscriberIntPrefixType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS read-only STATUS current DESCRIPTION "Subscriber's internal prefix type." ::= { natSubscribersTableEntry 3 } natSubscriberIntPrefix OBJECT-TYPE SYNTAX InetAddress MAX-ACCESS read-only STATUS current DESCRIPTION "Prefix assigned to a subscriber's CPE." ::= { natSubscribersTableEntry 4 } natSubscriberIntPrefixLength OBJECT-TYPE SYNTAX InetAddressPrefixLength MAX-ACCESS read-only STATUS current DESCRIPTION "Length of the prefix assigned to a subscriber's CPE, in bits. In case a single address is assigned, this will be 32 for IPv4 and 128 for IPv6." ::= { natSubscribersTableEntry 5 } natSubscriberPool OBJECT-TYPE SYNTAX NatPoolIndex MAX-ACCESS read-only STATUS current DESCRIPTION Perreault, et al. Expires August 25, 2013 [Page 75] Internet-Draft NEW NAT MIB February 2013 "External address pool to which this subscriber belongs." ::= { natSubscribersTableEntry 6 } natSubscriberCntTranslates OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of packets received from or sent to this subscriber and to which NAT has been applied." ::= { natSubscribersTableEntry 7 } natSubscriberCntOOP OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of packets received from this subscriber to which NAT could not be applied because no external port was available, excluding quota limitations." ::= { natSubscribersTableEntry 8 } natSubscriberCntResource OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of packets received from this subscriber to which NAT could not be applied because of resource constraints (excluding out-of-ports condition)." ::= { natSubscribersTableEntry 9 } natSubscriberCntStateMismatch OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of packets received from or destined to this subscriber to which NAT could not be applied because of mapping state mismatch. For example, a TCP packet that matches an existing mapping but is dropped because its flags are incompatible with the current state of the mapping would cause this counter to be incremented." ::= { natSubscribersTableEntry 10 } natSubscriberCntQuota OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only Perreault, et al. Expires August 25, 2013 [Page 76] Internet-Draft NEW NAT MIB February 2013 STATUS current DESCRIPTION "The number of packets received from or destined to this subscriber to which NAT could not be applied because of quota limitations. Quotas include absolute limits as well as limits on the rate of allocation." ::= { natSubscribersTableEntry 11 } natSubscriberCntMappings OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of currently active mappings created by or for this subscriber. Equal to natSubscriberCntMapRemovals - natSubscriberCntMapCreations." ::= { natSubscribersTableEntry 12 } natSubscriberCntMapCreations OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of mappings created by or for this subscriber." ::= { natSubscribersTableEntry 13 } natSubscriberCntMapRemovals OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of mappings removed by or for this subscriber." ::= { natSubscribersTableEntry 14 } natSubscriberLimitMappings OBJECT-TYPE SYNTAX Unsigned32 MAX-ACCESS read-write STATUS current DESCRIPTION "Limit on the number of active mappings created by or for this subscriber. Zero means unlimited." ::= { natSubscribersTableEntry 15 } natSubscriberMapNotifyThresh OBJECT-TYPE SYNTAX Unsigned32 MAX-ACCESS read-write Perreault, et al. Expires August 25, 2013 [Page 77] Internet-Draft NEW NAT MIB February 2013 STATUS current DESCRIPTION "See NatNotifSubscriberMappings." ::= { natSubscribersTableEntry 16 } END 5. Security Considerations Unauthorized access to the write-able objects could cause a denial of service and/or widespread network disturbance. Hence, the support for SET operations in a non-secure environment without proper protection can have a negative effect on network operations. At this writing, no security holes have been identified beyond those that SNMP Security is itself intended to address. These relate primarily to controlled access to sensitive information and the ability to configure a device - or which might result from operator error, which is beyond the scope of any security architecture. There are a number of managed objects in this MIB that may contain information that may be sensitive from a business perspective, in that they may represent NAT state information. Various objects can reveal the identity of private hosts that are engaged in a session with external end nodes. A curious outsider could monitor these to assess the number of private hosts being supported by the NAT device. Further, a disgruntled former employee of an enterprise could use the information to break into specific private hosts by intercepting the existing sessions or originating new sessions into the host. There are no objects that are sensitive in their own right, such as passwords or monetary amounts. It may even be important to control GET access to these objects and possibly to encrypt the values of these objects when they are sent over the network via SNMP. Not all versions of SNMP provide features for such a secure environment. 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. It is recommended that the 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). Perreault, et al. Expires August 25, 2013 [Page 78] Internet-Draft NEW NAT MIB February 2013 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. 6. IANA Considerations IANA has assigned object identifier 123 to the natMIB module, with prefix iso.org.dod.internet.mgmt.mib-2 in the Network Management Parameters registry [1]. 7. References 7.1. Normative References [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. [RFC2663] Srisuresh, P. and M. Holdrege, "IP Network Address Translator (NAT) Terminology and Considerations", RFC 2663, August 1999. [RFC3022] Srisuresh, P. and K. Egevang, "Traditional IP Network Address Translator (Traditional NAT)", RFC 3022, January 2001. [RFC4001] Daniele, M., Haberman, B., Routhier, S., and J. Schoenwaelder, "Textual Conventions for Internet Network Addresses", RFC 4001, February 2005. [RFC4750] Joyal, D., Galecki, P., Giacalone, S., Coltun, R., and F. Baker, "OSPF Version 2 Management Information Base", RFC 4750, December 2006. Perreault, et al. Expires August 25, 2013 [Page 79] Internet-Draft NEW NAT MIB February 2013 [RFC4787] Audet, F. and C. Jennings, "Network Address Translation (NAT) Behavioral Requirements for Unicast UDP", BCP 127, RFC 4787, January 2007. 7.2. Informative References [RFC3410] Case, J., Mundy, R., Partain, D., and B. Stewart, "Introduction and Applicability Statements for Internet- Standard Management Framework", RFC 3410, December 2002. [RFC4008] Rohit, R., Srisuresh, P., Raghunarayan, R., Pai, N., and C. Wang, "Definitions of Managed Objects for Network Address Translators (NAT)", RFC 4008, March 2005. URIs [1] Authors' Addresses Simon Perreault Viagenie 246 Aberdeen Quebec, QC G1R 2E1 Canada Phone: +1 418 656 9254 Email: simon.perreault@viagenie.ca URI: http://viagenie.ca Tina Tsou Huawei Technologies (USA) 2330 Central Expressway Santa Clara, CA 95050 USA Phone: +1 408 330 4424 Email: tina.tsou.zouting@huawei.com Perreault, et al. Expires August 25, 2013 [Page 80] Internet-Draft NEW NAT MIB February 2013 Senthil Sivakumar Cisco Systems 7100-8 Kit Creek Road Research Triangle Park, North Carolina 27709 USA Phone: +1 919 392 5158 Email: ssenthil@cisco.com Perreault, et al. Expires August 25, 2013 [Page 81]