NAT Working Group R. Raghunarayan INTERNET-DRAFT N. Pai Expires March 2004 Cisco Systems, Inc. R. Rohit Mascon Global Limited C. Wang Bank One Corp P. Srisuresh Caymas Systems, Inc. September 2003 Definitions of Managed Objects for Network Address Translators (NAT) Status of this Memo This document is an Internet-Draft and is in full conformance with all provisions of Section 10 of RFC2026 [16]. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. 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." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. Copyright Notice Copyright (C), 2003, The Internet Society. All Rights Reserved. Abstract This memo defines an SMIv2 Management Information Base (MIB) for a device implementing NAT function [RFC2663]. Particular emphasis was placed on devices implementing traditional NAT function [RFC3022]. This MIB may be used for configuration as well as Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 1] INTERNET-DRAFT NAT MIB September 2003 monitoring of a device capable of NAT function. The MIB may also be used for dynamic administration of resources on a NAT middlebox. Table of Contents 1 Introduction ................................................2 2 The Internet-Standard Management Framework ..................2 3 Terminology .................................................2 4 Overview ....................................................3 5 Definitions .................................................6 6 Intellectual Property.......................................51 7 Change History..............................................51 8 Acknowledgements ...........................................53 9 IANA Consideration .........................................53 10 Security Considerations ....................................54 11 References .................................................55 12 Author's Addresses .........................................55 13 Full Copyright Statement....................................57 1. Introduction This memo defines an SMIv2 Management Information Base (MIB) for a device implementing traditional NAT [17] function. This may be used for configuration as well as monitoring of a device capable of traditional NAT function. 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 RFC 3410 [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 STD 58, RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and STD 58, RFC 2580 [RFC2580]. 3. Terminology The terminology used throughout this document is mostly as per RFC 2663 [18]. Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 2] INTERNET-DRAFT NAT MIB September 2003 The term NAT has been used, throughout the document, to represent traditional NAT. In cases, where necessary, NAPT and Basic NAT will be used to represent port translation and address translation respectively. The terms public and private are used throughout the document in the context of networks, while the terms local and global are used when referring to addresses and ports. 4. Overview The MIB module has been split into three groups: o the configuration group, o the translation group, and o the statistics group. The configuration group consists of four tables and seven scalars: o the interface specific configuration table, which specifies the nat config parameters for a specific interface. o the address map table, which is an extension of the per-interface configuration table, and specifies information required to setup static/dynamic address and ports maps. o five protocol specific scalars, specifying the BIND timeout values for the more common protocols, TCP, UDP and ICMP, and a generic timeout value that can be used for all other protocols. o two scalars used to monitor address thresholds and generate notifications when the thresholds are crossed. The translation group, monitoring the dynamic activities of the NAT device, consists of two scalars and three tables: o the scalars, natAddrBindNumberOfEntries and natAddrPortBindNumberOfEntries, hold the number of entries the currently exist in the Address bind and the Address-Port bind tables respectively. o the Address bind table, which holds the currently active address bindings. o the Address-Port bind table, which holds the currently active transport bindings. o the session table, holds information regarding active NAT sessions. And finally, the statistics group consists of three tables: o the Protocol stats table, indicating translation statistics per protocol. o the Address Map stats table, indicating translation statistics per address map. Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 3] INTERNET-DRAFT NAT MIB September 2003 o the Interface stats table, indicating translation statistics per interface. There are also two notifications defined in the MIB: o natAddressUseRising notifies the end user/manager of the address usage exceeding a pre-defined threshold. o And finally, natPacketDiscard notifies the end user/manager of packets being discarded due to lack of address mappings. 4.1 Relation between the NAT configuration tables The association between the various configuration tables can be represented as follows: per interface config (global config parameters) | | | | | | |----------------------------| | | address map Every interface nat config is associated with a set of global (TCP, UDP and ICMP) config parameters, represented by the five protocol specific scalars. 4.2 Relation between the translation and the configuration tables The association between the configuration and the translation tables can be represented as follows. Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 4] INTERNET-DRAFT NAT MIB September 2003 Address map | | | ---------------------------------------------- | | | | | | Address Bind Address Port Bind | | | | | | ---------------------------------------------- | | | Session Every bind, address as well as address-port bind, is derived from an address map. The natAddrBindAddrMapName and natAddrPortBindAddrMapName objects provide the linkage between the bind and the address map it has been derived from. On the other hand, every NAT session is derived from a bind, address or address-port bind. The natSessionBindId and the natSessionSecondBindId objects represent this linkage. 4.3 Configuration via the MIB Entries in the Address Bind and Address-Port Bind Tables are derived from the address map table. Entries MUST, therefore, not exist in the Address Bind or a Address-Port Bind Entry without an associated entry in the Address Map table. Likewise, the session entries are derived from the Binds and an entry MUST not exist in the Session table without a corresponding Bind table entry. Before deleting a bind entry, all the session entries corresponding to the bind entry must be deleted. A Management station may use the following steps to configure entries in the NAT-MIB: - Create an entry in the natConfInterfaceTable specifying the the value of natConfInterfaceIndex as the interface index of the interface on which nat is being configured. Specify appropriate values, as applicable, for the other objects e.g. natConfInterfaceRealm, natConfServiceType, in the table. Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 5] INTERNET-DRAFT NAT MIB September 2003 - Create an address map entry in the natConfAddrMapTable, and set natConfAddrMapConfigName to the name of the address map entry created. - To configure NAT for TCP, UDP and ICMP protocols, the management station can set the protocol specific scalars. - Setting the natConfRowStatus to 'active'(1) will enable nat on the interface. Note that the associated entries in the natConfAddrMapTable must also be made active. - The Address Bind and Address-Port Table will have the entries created due to this nat configuration. A Management Station may also, if deemed necessary, create Address Bind or a Address-Port Bind entry and link those entries to the appropriate address map configured. 5. Definitions NAT-MIB DEFINITIONS ::= BEGIN IMPORTS MODULE-IDENTITY, OBJECT-TYPE, Integer32, Unsigned32, Gauge32, Counter64, TimeTicks, mib-2, NOTIFICATION-TYPE FROM SNMPv2-SMI TEXTUAL-CONVENTION FROM SNMPv2-TC MODULE-COMPLIANCE, NOTIFICATION-GROUP, OBJECT-GROUP FROM SNMPv2-CONF StorageType, RowStatus FROM SNMPv2-TC InterfaceIndex FROM IF-MIB SnmpAdminString FROM SNMP-FRAMEWORK-MIB InetAddressType, InetAddress, InetPortNumber FROM INET-ADDRESS-MIB; Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 6] INTERNET-DRAFT NAT MIB September 2003 natMIB MODULE-IDENTITY LAST-UPDATED "200309020000Z" ORGANIZATION "IETF NAT Working Group" CONTACT-INFO " Rohit Mascon Global Limted #59/2 100 ft Ring Road Banashankari II Stage Bangalore 560 070 India Phone: +91 80 679 6227 Email: rrohit74@hotmail.com Nalinaksh Pai Cisco Systems, Inc. Prestige Waterford No. 9, Brunton Road Bangalore - 560 025 India Phone: +91 80 532 1300 Email: npai@cisco.com Rajiv Raghunarayan Cisco Systems Inc. 170 West Tasman Drive San Jose, CA 95134 Phone: +1 408 853 9612 Email: raraghun@cisco.com Cliff Wang Information Security Bank One Corp 1111 Polaris Pkwy Columbus, OH 43240 Phone: +1 614 213 6117 Email: cliffwang2000@yahoo.com P. Srisuresh Caymas Systems, Inc. 1179-A North McDowell Blvd. Petaluma, CA 94954 Tel: (707) 283-5063 Email: srisuresh@yahoo.com " DESCRIPTION "This MIB module defines the generic managed objects for NAT." REVISION "200308200000Z" -- 20th Aug. 2003 DESCRIPTION "This revision removed the protocol extensibility Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 7] INTERNET-DRAFT NAT MIB September 2003 and correct the naming inconsistency." REVISION "200211030000Z" -- 3rd Nov. 2002 DESCRIPTION "This revision addresses the comments raised by the MIDCOM Working Group." REVISION "200206140000Z" -- 14th June 2002 DESCRIPTION "This MIB module addresses the smilint warnings found in the IETF MIB Module Validation." REVISION "200202070000Z" -- 7th Feb. 2002 DESCRIPTION "Merged the Config and Interface specific Tables. Added the ability for the Management Station to create/destroy nat address binds and sessions." REVISION "200111090000Z" -- 9th Nov. 2001 DESCRIPTION "Merged the Static and Dynamic addr Tables. Protocol specific extensibility added." REVISION "200109100000Z" -- 10th Sep. 2001 DESCRIPTION "Notifications added." REVISION "200103010000Z" -- 1st Mar. 2001 DESCRIPTION "Initial version of this MIB module." ::= { mib-2 XXX } -- RFC Ed.: replace XXX with IANA-assigned -- number & remove this note natMIBObjects OBJECT IDENTIFIER ::= { natMIB 1 } -- -- The Groups -- o natConfig - Pertaining to NAT configuration information -- o natTranslation - Pertaining to the NAT BINDs/sessions. -- o natStatistics - NAT statistics, other than those maintained -- by the Bind and Session tables. -- natConfig OBJECT IDENTIFIER ::= { natMIBObjects 1 } natTranslation OBJECT IDENTIFIER ::= { natMIBObjects 2 } natStatistics OBJECT IDENTIFIER ::= { natMIBObjects 3 } NATProtocolType ::= TEXTUAL-CONVENTION STATUS current DESCRIPTION "A list of protocols that support the network address translation. Inclusion of Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 8] INTERNET-DRAFT NAT MIB September 2003 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 natConfProtocol object which is a BITS representation of this TEXTUAL-CONVENTION." SYNTAX INTEGER { none (1), -- not specified other (2), -- none of the following icmp (3), udp (4), tcp (5) } -- -- UDP related NAT configuration -- natConfUdpDefIdleTimeout OBJECT-TYPE SYNTAX Integer32 (0..2147483647) UNITS "seconds" MAX-ACCESS read-write STATUS current DESCRIPTION "The default UDP idle timeout parameter." DEFVAL { 300 } ::= { natConfig 1 } -- -- ICMP related NAT configuration -- natConfIcmpDefIdleTimeout OBJECT-TYPE SYNTAX Integer32 (0..2147483647) UNITS "seconds" MAX-ACCESS read-write STATUS current DESCRIPTION "The default ICMP idle timeout parameter." DEFVAL { 300 } ::= { natConfig 2 } -- -- Other protocol parameters -- natConfOtherDefIdleTimeout OBJECT-TYPE SYNTAX Integer32 (0..2147483647) UNITS "seconds" Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 9] INTERNET-DRAFT NAT MIB September 2003 MAX-ACCESS read-write STATUS current DESCRIPTION "The default idle timeout parameter for protocols represented by the value other (2) in NATProtocolType." DEFVAL { 60 } ::= { natConfig 3 } -- -- TCP related NAT configuration -- natConfTcpDefIdleTimeout OBJECT-TYPE SYNTAX Integer32 (0..2147483647) UNITS "seconds" MAX-ACCESS read-write STATUS current DESCRIPTION "The default TCP idle timeout parameter." DEFVAL { 86400 } ::= { natConfig 4 } natConfTcpDefNegTimeout OBJECT-TYPE SYNTAX Integer32 (0..2147483647) UNITS "seconds" MAX-ACCESS read-write STATUS current DESCRIPTION "The default interval of time for which a TCP protocol session, is allowed to remain valid without any activity. This timeout value applies to a TCP session during its establishment and termination phases." DEFVAL { 60 } ::= { natConfig 5 } -- -- Notification thresholds -- natConfAddrRiseThreshold OBJECT-TYPE SYNTAX Unsigned32 (0..100) UNITS "percentage" MAX-ACCESS read-write STATUS current DESCRIPTION "This objects represents the rising threshold value for generation of the natAddressUseRising notification. A notification is generated whenever the usage percentage of the address map is equal to or greater than natConfAddrRiseThreshold. Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 10] INTERNET-DRAFT NAT MIB September 2003 Notifications should not be generated when the value of this object is 0." DEFVAL { 0 } ::= { natConfig 6 } natConfAddrFallThreshold OBJECT-TYPE SYNTAX Unsigned32 (0..100) UNITS "percentage" MAX-ACCESS read-write STATUS current DESCRIPTION "This object represents the falling threshold value for generation of the natAddressUseRising notification. This object only represents the lower end of the hysteresis curve, and notifications are not generated when this threshold is crossed." DEFVAL { 0 } ::= { natConfig 7 } -- -- The Configuration Groupn -- The per-interface NAT Configuration Table -- natConfInterfaceTable OBJECT-TYPE SYNTAX SEQUENCE OF NatConfInterfaceEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "This table specifies the configuration attributes for a device supporting NAT function." ::= { natConfig 8 } natConfInterfaceEntry OBJECT-TYPE SYNTAX NatConfInterfaceEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "Each entry in the natConfInterfaceTable holds a set of configuration parameters regarding the interface on which NAT is enabled." INDEX { natConfInterfaceIndex } ::= { natConfInterfaceTable 1 } NatConfInterfaceEntry ::= SEQUENCE { natConfInterfaceIndex InterfaceIndex, natConfInterfaceRealm INTEGER, natConfServiceType BITS, natConfAddrMapConfigName SnmpAdminString, Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 11] INTERNET-DRAFT NAT MIB September 2003 natConfStorageType StorageType, natConfRowStatus RowStatus } natConfInterfaceIndex OBJECT-TYPE SYNTAX InterfaceIndex MAX-ACCESS not-accessible STATUS current DESCRIPTION "The ifIndex of the interface on which NAT is enabled." ::= { natConfInterfaceEntry 1 } natConfInterfaceRealm OBJECT-TYPE SYNTAX INTEGER { private (1), public (2) } MAX-ACCESS read-create STATUS current DESCRIPTION "This object identifies whether this interface is connected to the private or the public realm." DEFVAL { public } ::= { natConfInterfaceEntry 2 } natConfServiceType OBJECT-TYPE SYNTAX BITS { basicNat (0), napt (1), bidirectionalNat (2), twiceNat (3) } MAX-ACCESS read-create STATUS current DESCRIPTION "An indication of the direction in which new sessions are permitted and the extent of translation done within the IP and transport headers." ::= { natConfInterfaceEntry 3 } natConfAddrMapConfigName OBJECT-TYPE SYNTAX SnmpAdminString (SIZE(0..32)) MAX-ACCESS read-create STATUS current DESCRIPTION "This object selects a set of address maps defined in the natConfAddrMapTable.The selected set of addr maps are defined by entries in the natConfAddrMapTable whose index value (natConfAddrMapName) is equal to this object." DEFVAL { ''H } ::= { natConfInterfaceEntry 4 } Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 12] INTERNET-DRAFT NAT MIB September 2003 natConfStorageType OBJECT-TYPE SYNTAX StorageType MAX-ACCESS read-create STATUS current DESCRIPTION "The storage type for this conceptual row." REFERENCE "Textual Conventions for SMIv2, Section 2." DEFVAL { nonVolatile } ::= { natConfInterfaceEntry 5 } natConfRowStatus OBJECT-TYPE SYNTAX RowStatus MAX-ACCESS read-create STATUS current DESCRIPTION "The status of this conceptual row. 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." ::= { natConfInterfaceEntry 6 } -- -- The Address Map Table -- natConfAddrMapTable OBJECT-TYPE SYNTAX SEQUENCE OF NatConfAddrMapEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "This table lists address map configuration for NAT." ::= { natConfig 9 } natConfAddrMapEntry OBJECT-TYPE SYNTAX NatConfAddrMapEntry MAX-ACCESS not-accessible STATUS current 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 { natConfAddrMapName, natConfAddrMapIndex } ::= { natConfAddrMapTable 1 } NatConfAddrMapEntry ::= SEQUENCE { natConfAddrMapName SnmpAdminString, natConfAddrMapIndex Unsigned32, Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 13] INTERNET-DRAFT NAT MIB September 2003 natConfAddrMapOwnerId Unsigned32, natConfAddrMapGroupId Unsigned32, natConfAddrMapEntryType INTEGER, natConfAddrMapTranslationEntity INTEGER, natConfLocalAddrType InetAddressType, natConfLocalAddrFrom InetAddress, natConfLocalAddrTo InetAddress, natConfLocalPortFrom InetPortNumber, natConfLocalPortTo InetPortNumber, natConfGlobalAddrType InetAddressType, natConfGlobalAddrFrom InetAddress, natConfGlobalAddrTo InetAddress, natConfGlobalPortFrom InetPortNumber, natConfGlobalPortTo InetPortNumber, natConfProtocol BITS, natConfAddrMapStorageType StorageType, natConfAddrMapRowStatus RowStatus } natConfAddrMapName OBJECT-TYPE SYNTAX SnmpAdminString (SIZE(1..32)) MAX-ACCESS not-accessible STATUS current DESCRIPTION "Name identifying a set of entries in this table. The combination of natConfAddrMapName and natConfAddrMapIndex uniquely identifies an entry in this table." ::= { natConfAddrMapEntry 1 } natConfAddrMapIndex OBJECT-TYPE SYNTAX Unsigned32 (1..4294967295) MAX-ACCESS not-accessible STATUS current DESCRIPTION "Along with natConfAddrMapName, this object uniquely identifies an entry in the natConfAddrMapTable. Address map entries are applied in the order specified by natConfAddrMapIndex." ::= { natConfAddrMapEntry 2 } natConfAddrMapOwnerId OBJECT-TYPE SYNTAX Unsigned32 (1..4294967295) MAX-ACCESS read-only STATUS current Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 14] INTERNET-DRAFT NAT MIB September 2003 DESCRIPTION "The identifier of the entity that owns this entry. This object is a unique Identifier and is generated by the NAT middlebox. The owner of the entry may be the NAT middledbox itself or one of the MIDCOM agents that engage in a MIDCOM session with the NAT middlebox." ::= { natConfAddrMapEntry 3 } natConfAddrMapGroupId OBJECT-TYPE SYNTAX Unsigned32 (1..4294967295) MAX-ACCESS read-only STATUS current DESCRIPTION "The identifier of a group to which this entry belongs. This ojbect is a unique identifier and is generated by the NAT middlebox." ::= { natConfAddrMapEntry 4 } natConfAddrMapEntryType OBJECT-TYPE SYNTAX INTEGER { static (1), dynamic (2) } MAX-ACCESS read-create STATUS current DESCRIPTION "This config parameter can be used to set up static or dynamic address maps." ::= { natConfAddrMapEntry 5 } natConfAddrMapTranslationEntity OBJECT-TYPE SYNTAX INTEGER { inboundSrcAddr (1), inboundDstAddr (2), outboundSrcAddr (3), outboundDstAddr (4) } MAX-ACCESS read-create STATUS current DESCRIPTION "The end-point entity (Source or desitnation) 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. Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 15] INTERNET-DRAFT NAT MIB September 2003 NAT address (and Transport-ID) maps may be defined to effect inbound or outbound sessions. Further, the translation entity on the first packet (of a session) may be source end-point (i.e., source IP address and source port) or destination end-point (i.e., destination address and destination port). Traditionally, address map 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 outboundSrcAddr for those interfaces. Alternately, if address map 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 inboundSrcAddr. I.e., effecting translation of source end-point for inbound sessions. If TwiceNAT were to be configured on a private interface, there will be two address map entries. one effecting translation of source end-point for inbound sessions (i.e., inboundSrcAddr) and another effecting transaltion of destination end-point for inbound sessions (i.e., inboundDstAddr)." ::= { natConfAddrMapEntry 6 } natConfLocalAddrType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS read-create STATUS current DESCRIPTION "This object specifies the address type used for natConfLocalAddrFrom and natConfLocalAddrTo." ::= { natConfAddrMapEntry 7 } natConfLocalAddrFrom OBJECT-TYPE SYNTAX InetAddress (SIZE (0..20)) MAX-ACCESS read-create STATUS current DESCRIPTION "This object specifies the first IP address of the range of IP addresses mapped by this translation entry." ::= { natConfAddrMapEntry 8 } natConfLocalAddrTo OBJECT-TYPE SYNTAX InetAddress (SIZE (0..20)) MAX-ACCESS read-create STATUS current Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 16] INTERNET-DRAFT NAT MIB September 2003 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 natConfLocalAddrFrom. For a static NAT, the number of addresses in the range defined by natConfLocalAddrFrom and natConfLocalAddrTo must be equal to the number of addresses in the range defined by natConfGlobalAddrFrom and natConfGlobalAddrTo." ::= { natConfAddrMapEntry 9 } natConfLocalPortFrom OBJECT-TYPE SYNTAX InetPortNumber MAX-ACCESS read-create STATUS current DESCRIPTION "If this conceptual row describes a Basic NAT address mapping, then the value of this object must be 0. If this conceptual row describes NAPT, then the value of this object specifies the first port number in the range of ports being mapped. If the translation specifies a single port, then the value of this object is equal to the value of natConfLocalPortTo." ::= { natConfAddrMapEntry 10 } natConfLocalPortTo OBJECT-TYPE SYNTAX InetPortNumber MAX-ACCESS read-create STATUS current DESCRIPTION "If this conceptual row describes a Basic NAT address mapping, then the value of this object must be 0. If this conceptual row describes NAPT, then the value of this object specifies the last port number in the range of ports being mapped. If the translation specifies a single port, then the value of this object is equal to the value of natConfLocalPortFrom." ::= { natConfAddrMapEntry 11 } natConfGlobalAddrType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS read-create STATUS current DESCRIPTION "This object specifies the address type used for natConfGlobalAddrFrom and natConfGlobalAddrTo." Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 17] INTERNET-DRAFT NAT MIB September 2003 ::= { natConfAddrMapEntry 12 } natConfGlobalAddrFrom OBJECT-TYPE SYNTAX InetAddress (SIZE (0..20)) MAX-ACCESS read-create STATUS current DESCRIPTION "This object specifies the first IP address of the range of IP addresses being mapped to." ::= { natConfAddrMapEntry 13 } natConfGlobalAddrTo OBJECT-TYPE SYNTAX InetAddress (SIZE (0..20)) MAX-ACCESS read-create STATUS current DESCRIPTION "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 natConfGlobalAddrFrom. For a static NAT, the number of addresses in the range defined by natConfGlobalAddrFrom and natConfGlobalAddrTo must be equal to the number of addresses in the range defined by natConfLocalAddrFrom and natConfLocalAddrTo." ::= { natConfAddrMapEntry 14 } natConfGlobalPortFrom OBJECT-TYPE SYNTAX InetPortNumber MAX-ACCESS read-create STATUS current DESCRIPTION "If this conceptual row describes a Basic NAT address mapping, then the value of this object must be 0. 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. If the translation specifies a single port, then the value of this object is equal to the value natConfGlobalPortTo." ::= { natConfAddrMapEntry 15 } natConfGlobalPortTo OBJECT-TYPE SYNTAX InetPortNumber MAX-ACCESS read-create STATUS current DESCRIPTION "If this conceptual row describes a Basic NAT address mapping, then the value of this object must be 0. If this conceptual row describes NAPT, then the value of this object specifies the last port number in the range of Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 18] INTERNET-DRAFT NAT MIB September 2003 ports being mapped to. If the translation specifies a single port, then the value of this object is equal to the value of natConfGlobalPortFrom." ::= { natConfAddrMapEntry 16 } natConfProtocol OBJECT-TYPE SYNTAX BITS { other (0), icmp (1), udp (2), tcp (3) } MAX-ACCESS read-create STATUS current DESCRIPTION "This object specifies a bitmap of protocol identifiers. This object is a BITS representation for the NATProtocolType, hence any change in the NATProtocolType should also be reflected here." ::= { natConfAddrMapEntry 17 } natConfAddrMapStorageType OBJECT-TYPE SYNTAX StorageType MAX-ACCESS read-create STATUS current DESCRIPTION "The storage type for this conceptual row." REFERENCE "Textual Conventions for SMIv2, Section 2." DEFVAL { nonVolatile } ::= { natConfAddrMapEntry 18 } natConfAddrMapRowStatus OBJECT-TYPE SYNTAX RowStatus MAX-ACCESS read-create STATUS current DESCRIPTION "The status of this conceptual row. 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." ::= { natConfAddrMapEntry 19 } Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 19] INTERNET-DRAFT NAT MIB September 2003 -- -- The Translation Group -- -- -- Address Bind section -- natAddrBindNumberOfEntries OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "This object maintains a count of the number of entries that currently exist in the natAddrBindTable." ::= { natTranslation 1 } -- -- The NAT Address BIND Table -- natAddrBindTable OBJECT-TYPE SYNTAX SEQUENCE OF NatAddrBindEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "This table holds information about the currently active NAT BINDs." ::= { natTranslation 2 } natAddrBindEntry OBJECT-TYPE SYNTAX NatAddrBindEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "Each entry in this table holds information about an active address BIND." INDEX { natAddrBindLocalAddrType, natAddrBindLocalAddr } ::= { natAddrBindTable 1 } NatAddrBindEntry ::= SEQUENCE { natAddrBindLocalAddrType InetAddressType, natAddrBindLocalAddr InetAddress, natAddrBindOwnerId Unsigned32, natAddrBindGroupId Unsigned32, natAddrBindGlobalAddrType InetAddressType, natAddrBindGlobalAddr InetAddress, natAddrBindId Unsigned32, natAddrBindDirection INTEGER, Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 20] INTERNET-DRAFT NAT MIB September 2003 natAddrBindType INTEGER, natAddrBindAddrMapName SnmpAdminString, natAddrBindSessionCount Gauge32, natAddrBindMaxIdleTime TimeTicks, natAddrBindCurrentIdleTime TimeTicks, natAddrBindInTranslate Counter64, natAddrBindOutTranslate Counter64, natAddrBindRowStatus RowStatus } natAddrBindLocalAddrType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS not-accessible STATUS current DESCRIPTION "This object specifies the address type used for natAddrBindLocalAddr." ::= { natAddrBindEntry 1 } natAddrBindLocalAddr OBJECT-TYPE SYNTAX InetAddress (SIZE (0..20)) MAX-ACCESS not-accessible STATUS current DESCRIPTION "This object represents the private-realm specific network layer address, which maps to the public-realm address represented by natAddrBindGlobalAddr." ::= { natAddrBindEntry 2 } natAddrBindOwnerId OBJECT-TYPE SYNTAX Unsigned32 (1..4294967295) MAX-ACCESS read-only STATUS current DESCRIPTION "The identifier of the entity that owns this entry. This object is a unique Identifier and is generated by the NAT middlebox. The owner of the entry may be the NAT middledbox itself or one of the MIDCOM agents that engage in a MIDCOM session with the NAT middlebox." ::= { natAddrBindEntry 3 } natAddrBindGroupId OBJECT-TYPE SYNTAX Unsigned32 (1..4294967295) MAX-ACCESS read-only STATUS current DESCRIPTION "The identifier of a group to which this entry belongs. Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 21] INTERNET-DRAFT NAT MIB September 2003 This ojbect is a unique identifier and is generated by the NAT middlebox." ::= { natAddrBindEntry 4 } natAddrBindGlobalAddrType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS read-create STATUS current DESCRIPTION "This object specifies the address type used for natAddrBindGlobalAddr." ::= { natAddrBindEntry 5 } natAddrBindGlobalAddr OBJECT-TYPE SYNTAX InetAddress (SIZE (0..20)) MAX-ACCESS read-create STATUS current DESCRIPTION "This object represents the public-realm network layer address that maps to the private-realm network layer address represented by natAddrBindLocalAddr." ::= { natAddrBindEntry 6 } natAddrBindId OBJECT-TYPE SYNTAX Unsigned32 MAX-ACCESS read-only STATUS current 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 Address bind and the Address-Port bind tables." ::= { natAddrBindEntry 7 } natAddrBindDirection OBJECT-TYPE SYNTAX INTEGER { uniDirectional (1), biDirectional (2) } MAX-ACCESS read-create STATUS current DESCRIPTION "This object represents the direction of the BIND. A BIND may be either uni-directional or bi-directional, same as the orientation of the address map, based on which this bind is formed." ::= { natAddrBindEntry 8 } Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 22] INTERNET-DRAFT NAT MIB September 2003 natAddrBindType OBJECT-TYPE SYNTAX INTEGER { static (1), dynamic (2) } MAX-ACCESS read-create STATUS current DESCRIPTION "This object indicates whether the BIND is static or dynamic." ::= { natAddrBindEntry 9 } natAddrBindAddrMapName OBJECT-TYPE SYNTAX SnmpAdminString (SIZE(1..32)) MAX-ACCESS read-create STATUS current DESCRIPTION "This object is a pointer to the natConfAddrMapTable entry (and the parameters of that entry) which was used in creating this BIND. If the bind is being created by the Management Station, then it should set the value for this object to an existing addrMapName. An attempt to set this object to a nonExistent addrMapName will result in a error." ::= { natAddrBindEntry 10 } natAddrBindSessionCount OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of sessions currently using this BIND." ::= { natAddrBindEntry 11 } natAddrBindMaxIdleTime OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-create STATUS current 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 12 } Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 23] INTERNET-DRAFT NAT MIB September 2003 natAddrBindCurrentIdleTime OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS current DESCRIPTION "At any given instance of time, this object indicates the time that this BIND has been idle with no sessions attached to it. The value of this object is of relevance only for dynamic NAT." ::= { natAddrBindEntry 13 } natAddrBindInTranslate OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of inbound packets that were successfully translated using this BIND entry." ::= { natAddrBindEntry 14 } natAddrBindOutTranslate OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of outbound packets that were successfully translated using this BIND entry." ::= { natAddrBindEntry 15 } natAddrBindRowStatus OBJECT-TYPE SYNTAX RowStatus MAX-ACCESS read-create STATUS current DESCRIPTION "The status of this conceptual row. None of the writable objects except natAddrBindMaxIdleTime in this row may be modified while the value of this object is active(1)." REFERENCE "Textual Conventions for SMIv2, Section 2." ::= { natAddrBindEntry 16 } Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 24] INTERNET-DRAFT NAT MIB September 2003 -- -- Address-Port Bind section -- natAddrPortBindNumberOfEntries OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "This object maintains a count of the number of entries that currently exist in the natAddrPortBindTable." ::= { natTranslation 3 } -- -- The NAT Address-Port BIND Table -- natAddrPortBindTable OBJECT-TYPE SYNTAX SEQUENCE OF NatAddrPortBindEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "This table holds information about the currently active NAPT BINDs." ::= { natTranslation 4 } natAddrPortBindEntry OBJECT-TYPE SYNTAX NatAddrPortBindEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "Each entry in the this table holds information about a NAPT BIND that is currently active." INDEX { natAddrPortBindLocalAddrType, natAddrPortBindLocalAddr, natAddrPortBindLocalPort, natAddrPortBindProtocol } ::= { natAddrPortBindTable 1 } NatAddrPortBindEntry ::= SEQUENCE { natAddrPortBindLocalAddrType InetAddressType, natAddrPortBindLocalAddr InetAddress, natAddrPortBindLocalPort InetPortNumber, natAddrPortBindProtocol NATProtocolType, natAddrPortBindOwnerId Unsigned32, natAddrPortBindGroupId Unsigned32, natAddrPortBindGlobalAddrType InetAddressType, natAddrPortBindGlobalAddr InetAddress, natAddrPortBindGlobalPort InetPortNumber, natAddrPortBindId Unsigned32, natAddrPortBindDirection INTEGER, Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 25] INTERNET-DRAFT NAT MIB September 2003 natAddrPortBindType INTEGER, natAddrPortBindAddrMapName SnmpAdminString, natAddrPortBindSessionCount Gauge32, natAddrPortBindMaxIdleTime TimeTicks, natAddrPortBindCurrentIdleTime TimeTicks, natAddrPortBindInTranslate Counter64, natAddrPortBindOutTranslate Counter64, natAddrPortBindRowStatus RowStatus } natAddrPortBindLocalAddrType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS not-accessible STATUS current DESCRIPTION "This object specifies the address type used for natAddrPortBindLocalAddr." ::= { natAddrPortBindEntry 1 } natAddrPortBindLocalAddr OBJECT-TYPE SYNTAX InetAddress (SIZE (0..20)) MAX-ACCESS not-accessible STATUS current 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." ::= { natAddrPortBindEntry 2 } natAddrPortBindLocalPort OBJECT-TYPE SYNTAX InetPortNumber MAX-ACCESS not-accessible STATUS current DESCRIPTION "This object represents the private-realm specific port number (or query ID in case of ICMP messages) which, in conjunction with natAddrPortBindLocalAddr, maps to the public-realm network layer address and transport id represented by natAddrPortBindGlobalAddr and natAddrPortBindGlobalPort respectively." ::= { natAddrPortBindEntry 3 } natAddrPortBindProtocol OBJECT-TYPE SYNTAX NATProtocolType MAX-ACCESS not-accessible STATUS current Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 26] INTERNET-DRAFT NAT MIB September 2003 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 } natAddrPortBindOwnerId OBJECT-TYPE SYNTAX Unsigned32 (1..4294967295) MAX-ACCESS read-only STATUS current DESCRIPTION "The identifier of the entity that owns this entry. This object is a unique Identifier and is generated by the NAT middlebox. The owner of the entry may be the NAT middledbox itself or one of the MIDCOM agents that engage in a MIDCOM session with the NAT middlebox." ::= { natAddrPortBindEntry 5 } natAddrPortBindGroupId OBJECT-TYPE SYNTAX Unsigned32 (1..4294967295) MAX-ACCESS read-only STATUS current DESCRIPTION "The identifier of a group to which this entry belongs. This ojbect is a unique identifier and is generated by the NAT middlebox." ::= { natAddrPortBindEntry 6 } natAddrPortBindGlobalAddrType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS read-create STATUS current DESCRIPTION "This object specifies the address type used for natAddrPortBindGlobalAddr." ::= { natAddrPortBindEntry 7 } natAddrPortBindGlobalAddr OBJECT-TYPE SYNTAX InetAddress (SIZE (0..20)) MAX-ACCESS read-create STATUS current 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." Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 27] INTERNET-DRAFT NAT MIB September 2003 ::= { natAddrPortBindEntry 8 } natAddrPortBindGlobalPort OBJECT-TYPE SYNTAX InetPortNumber MAX-ACCESS read-create STATUS current DESCRIPTION "This object represents the port number (or query id in case of ICMP) that, in conjunction with natAddrPortBindGlobalAddr, maps to the private-realm network layer address and transport id represented by natAddrPortBindLocalAddr and natAddrPortBindLocalPort respectively." ::= { natAddrPortBindEntry 9 } natAddrPortBindId OBJECT-TYPE SYNTAX Unsigned32 MAX-ACCESS read-only STATUS current 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 Address Bind and Address-Port Bind tables." ::= { natAddrPortBindEntry 10 } natAddrPortBindDirection OBJECT-TYPE SYNTAX INTEGER { uniDirectional (1), biDirectional (2) } MAX-ACCESS read-create STATUS current DESCRIPTION "This object represents the direction of the BIND. A BIND may be either uni-directional or bi-directional, same as the orientation of the address map, based on which this bind is formed." ::= { natAddrPortBindEntry 11 } natAddrPortBindType OBJECT-TYPE SYNTAX INTEGER { static (1), dynamic (2) } MAX-ACCESS read-create STATUS current DESCRIPTION "This object indicates whether the BIND is static or dynamic." Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 28] INTERNET-DRAFT NAT MIB September 2003 ::= { natAddrPortBindEntry 12 } natAddrPortBindAddrMapName OBJECT-TYPE SYNTAX SnmpAdminString MAX-ACCESS read-create STATUS current DESCRIPTION "This object is a pointer to the NatConfAddrMapEntry entry (and the parameters of that entry) which was used in creating this BIND. If the bind is being created by the Management Station, then it should set the value for this object as well. An attempt to set this object to a nonExistent addrMapName will result in a error." ::= { natAddrPortBindEntry 13 } natAddrPortBindSessionCount OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of sessions currently using this BIND." ::= { natAddrPortBindEntry 14 } natAddrPortBindMaxIdleTime OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-create STATUS current 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." ::= { natAddrPortBindEntry 15 } natAddrPortBindCurrentIdleTime OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS current DESCRIPTION "At any given instance of time, this object indicates the time that this BIND has been idle with no sessions attached to it. The value of this object is of relevance only for dynamic NAT." ::= { natAddrPortBindEntry 16 } Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 29] INTERNET-DRAFT NAT MIB September 2003 natAddrPortBindInTranslate OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of inbound packets that were translated as per this BIND entry." ::= { natAddrPortBindEntry 17 } natAddrPortBindOutTranslate OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of outbound packets that were translated as per this BIND entry." ::= { natAddrPortBindEntry 18 } natAddrPortBindRowStatus OBJECT-TYPE SYNTAX RowStatus MAX-ACCESS read-create STATUS current DESCRIPTION "The status of this conceptual row. None of the writable objects except natAddrPortBindMaxIdleTime in this row may be modified while the value of this object is active(1)." REFERENCE "Textual Conventions for SMIv2, Section 2." ::= { natAddrPortBindEntry 20 } -- -- The Session Table -- natSessionTable OBJECT-TYPE SYNTAX SEQUENCE OF NatSessionEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The (conceptual) table containing one entry for each NAT session currently active on this NAT device." ::= { natTranslation 5 } natSessionEntry OBJECT-TYPE SYNTAX NatSessionEntry MAX-ACCESS not-accessible STATUS current Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 30] INTERNET-DRAFT NAT MIB September 2003 DESCRIPTION "An entry (conceptual row) containing information about an active NAT session on this NAT device." INDEX { natSessionBindId, natSessionId } ::= { natSessionTable 1 } NatSessionEntry ::= SEQUENCE { natSessionBindId Unsigned32, natSessionId Unsigned32, natSessionOwnerId Unsigned32, natSessionGroupId Unsigned32, natSessionDirection INTEGER, natSessionUpTime TimeTicks, natSessionProtocolType NATProtocolType, natSessionOrigPrivateAddrType InetAddressType, natSessionOrigPrivateAddr InetAddress, natSessionTransPrivateAddrType InetAddressType, natSessionTransPrivateAddr InetAddress, natSessionOrigPrivatePort InetPortNumber, natSessionTransPrivatePort InetPortNumber, natSessionOrigPublicAddrType InetAddressType, natSessionOrigPublicAddr InetAddress, natSessionTransPublicAddrType InetAddressType, natSessionTransPublicAddr InetAddress, natSessionOrigPublicPort InetPortNumber, natSessionTransPublicPort InetPortNumber, natSessionMaxIdleTime TimeTicks, natSessionCurrentIdleTime TimeTicks, natSessionSecondBindId Unsigned32, natSessionInTranslate Counter64, natSessionOutTranslate Counter64, natSessionRowStatus RowStatus } natSessionBindId OBJECT-TYPE SYNTAX Unsigned32 MAX-ACCESS not-accessible STATUS current DESCRIPTION "This object represents a BIND id that is dynamically assigned to each BIND by a NAT enabled device. This bind id is that same as represented by the BindId objects in the Address bind and Address-Port bind tables." ::= { natSessionEntry 1 } natSessionId OBJECT-TYPE SYNTAX Unsigned32 MAX-ACCESS not-accessible STATUS current Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 31] INTERNET-DRAFT NAT MIB September 2003 DESCRIPTION "The session ID for this NAT session." ::= { natSessionEntry 2 } natSessionOwnerId OBJECT-TYPE SYNTAX Unsigned32 (1..4294967295) MAX-ACCESS read-only STATUS current DESCRIPTION "The identifier of the entity that owns this entry. This object is a unique Identifier and is generated by the NAT middlebox. The owner of the entry may be the NAT middledbox itself or one of the MIDCOM agents that engage in a MIDCOM session with the NAT middlebox." ::= { natSessionEntry 3 } natSessionGroupId OBJECT-TYPE SYNTAX Unsigned32 (1..4294967295) MAX-ACCESS read-only STATUS current DESCRIPTION "The identifier of a group to which this entry belongs. This ojbect is a unique identifier and is generated by the NAT middlebox." ::= { natSessionEntry 4 } natSessionDirection OBJECT-TYPE SYNTAX INTEGER { inbound (1), outbound (2) } MAX-ACCESS read-create STATUS current DESCRIPTION "The direction of this session with respect to the 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 5 } natSessionUpTime OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS current DESCRIPTION "The up time of this session in one-hundredths of a second." ::= { natSessionEntry 6 } Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 32] INTERNET-DRAFT NAT MIB September 2003 natSessionProtocolType OBJECT-TYPE SYNTAX NATProtocolType MAX-ACCESS read-create STATUS current DESCRIPTION "The protocol type of this session." ::= { natSessionEntry 7 } natSessionOrigPrivateAddrType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS read-create STATUS current DESCRIPTION "This object specifies the address type used for natSessionOrigPrivateAddr." ::= { natSessionEntry 8 } natSessionOrigPrivateAddr OBJECT-TYPE SYNTAX InetAddress (SIZE (0..20)) MAX-ACCESS read-create STATUS current DESCRIPTION "The original IP address of the session endpoint that lies in the private network." ::= { natSessionEntry 9 } natSessionTransPrivateAddrType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS read-create STATUS current DESCRIPTION "This object specifies the address type used for natSessionTransPrivateAddr." ::= { natSessionEntry 10 } natSessionTransPrivateAddr OBJECT-TYPE SYNTAX InetAddress (SIZE (0..20)) MAX-ACCESS read-create STATUS current DESCRIPTION "The translated IP address of the session endpoint that lies in the private network. The value of this object is equal to that of the original private IP Address (natSessionOrigPrivateAddr) when there is no translation." ::= { natSessionEntry 11 } Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 33] INTERNET-DRAFT NAT MIB September 2003 natSessionOrigPrivatePort OBJECT-TYPE SYNTAX InetPortNumber MAX-ACCESS read-create STATUS current DESCRIPTION "The original transport port of the session endpoint that belongs to the private network. If this is an ICMP session then the value is the ICMP request ID. The value of this object must be 0 when ports are not involved in the translation." ::= { natSessionEntry 12 } natSessionTransPrivatePort OBJECT-TYPE SYNTAX InetPortNumber MAX-ACCESS read-create STATUS current DESCRIPTION "The translated transport port of the session that lies in the private network.The value of this object is equal to that of the original transport port (natSessionOrigPrivatePort) when there is no translation." ::= { natSessionEntry 13 } natSessionOrigPublicAddrType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS read-create STATUS current DESCRIPTION "This object specifies the address type used for natSessionOrigPublicAddr." ::= { natSessionEntry 14 } natSessionOrigPublicAddr OBJECT-TYPE SYNTAX InetAddress (SIZE (0..20)) MAX-ACCESS read-create STATUS current DESCRIPTION "The original IP address of the session endpoint that lies in the public network." ::= { natSessionEntry 15 } natSessionTransPublicAddrType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS read-create STATUS current DESCRIPTION "This object specifies the address type used for natSessionTransPublicAddr." ::= { natSessionEntry 16 } Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 34] INTERNET-DRAFT NAT MIB September 2003 natSessionTransPublicAddr OBJECT-TYPE SYNTAX InetAddress (SIZE (0..20)) MAX-ACCESS read-create STATUS current DESCRIPTION "The translated IP address of the session endpoint that belongs to the public network. The value of this object is equal to that of the original public IP Address (natSessionOrigPublicAddr) when there is no translation." ::= { natSessionEntry 17 } natSessionOrigPublicPort OBJECT-TYPE SYNTAX InetPortNumber MAX-ACCESS read-create STATUS current DESCRIPTION "The original transport port of the session endpoint that belongs to the public network. If this is an ICMP session then the value contains the ICMP request ID. The value of this object must be 0 when ports are not involved in the translation." ::= { natSessionEntry 18 } natSessionTransPublicPort OBJECT-TYPE SYNTAX InetPortNumber MAX-ACCESS read-create STATUS current DESCRIPTION "The translated transport port of the session endpoint that belongs to the public network. The value of this object is equal to that of the original transport port (natSessionOrigPublicPort) when there is no translation." ::= { natSessionEntry 19 } natSessionMaxIdleTime OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-create STATUS current 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 current Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 35] INTERNET-DRAFT NAT MIB September 2003 DESCRIPTION "The time since a packet belonging to this session was last detected." ::= { natSessionEntry 21 } natSessionSecondBindId OBJECT-TYPE SYNTAX Unsigned32 MAX-ACCESS read-create STATUS current DESCRIPTION "The natBindId of the 'other' NAT binding incase of Twice NAT. An instance of this object contains a valid value only if the binding type for this session is TwiceNAT. This object may not be modified while the value of natSessionStatus is active(1). An attempt to set this object while the value of natSessionStatus is active(1) will result in an inconsistentValue error. The value of this object MUST point to a valid bind id, in case of TwiceNAT." ::= { natSessionEntry 22 } natSessionInTranslate OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of inbound packets that were translated for this session." ::= { natSessionEntry 23 } natSessionOutTranslate OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of outbound packets that were translated for this session." ::= { natSessionEntry 24 } natSessionRowStatus OBJECT-TYPE SYNTAX RowStatus MAX-ACCESS read-create STATUS current Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 36] INTERNET-DRAFT NAT MIB September 2003 DESCRIPTION "The status of this conceptual row. For a TwiceNAT session, until instance of natSessionSecondBindId column has an appropriate (valid) value, the value of the corresponding instance of the natSessionStatus column must be 'notReady'. None of the writable objects except natSessionMaxIdleTime in this row may be modified while the value of this object is active(1)." REFERENCE "Textual Conventions for SMIv2, Section 2." ::= { natSessionEntry 25 } -- -- natStatistics Group -- -- -- The Protocol Stats table -- natStatsProtocolTable OBJECT-TYPE SYNTAX SEQUENCE OF NatStatsProtocolEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The (conceptual) table containing per protocol NAT statistics." ::= { natStatistics 1 } natStatsProtocolEntry OBJECT-TYPE SYNTAX NatStatsProtocolEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry (conceptual row) containing NAT statistics pertaining to a particular protocol." INDEX { natStatsProtocol } ::= { natStatsProtocolTable 1 } NatStatsProtocolEntry ::= SEQUENCE { natStatsProtocol NATProtocolType, natStatsProtocolInTranslate Counter64, natStatsProtocolOutTranslate Counter64, natStatsProtocolRejectCount Counter64 } Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 37] INTERNET-DRAFT NAT MIB September 2003 natStatsProtocol OBJECT-TYPE SYNTAX NATProtocolType MAX-ACCESS not-accessible STATUS current DESCRIPTION "This object represents the protocol pertaining to which statistics are reported." ::= { natStatsProtocolEntry 1 } natStatsProtocolInTranslate OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of inbound packets, pertaining to the protocol identified by natStatsProtocol, that underwent NAT." ::= { natStatsProtocolEntry 2 } natStatsProtocolOutTranslate OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of outbound packets, pertaining to the protocol identified by natStatsProtocol, that underwent NAT." ::= { natStatsProtocolEntry 3 } natStatsProtocolRejectCount OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of packets, pertaining to the protocol identified by natStatsProtocol, 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." ::= { natStatsProtocolEntry 4 } -- -- The Address Map Stats table -- natStatsAddrMapTable OBJECT-TYPE SYNTAX SEQUENCE OF NatStatsAddrMapEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The (conceptual) table containing per address map NAT statistics." Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 38] INTERNET-DRAFT NAT MIB September 2003 ::= { natStatistics 2 } natStatsAddrMapEntry OBJECT-TYPE SYNTAX NatStatsAddrMapEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry (conceptual row) containing NAT statistics per address map." AUGMENTS { natConfAddrMapEntry } ::= { natStatsAddrMapTable 1 } NatStatsAddrMapEntry ::= SEQUENCE { natStatsAddrMapInTranslate Counter64, natStatsAddrMapOutTranslate Counter64, natStatsAddrMapNoResource Counter64, natStatsAddrMapAddrUsed Gauge32 } natStatsAddrMapInTranslate OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of inbound packets, pertaining to this address map entry, that were translated." ::= { natStatsAddrMapEntry 3 } natStatsAddrMapOutTranslate OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of outbound packets, pertaining to this address map entry, that were translated." ::= { natStatsAddrMapEntry 4 } natStatsAddrMapNoResource OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current 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 this object must always be zero in case of static address map." ::= { natStatsAddrMapEntry 5 } Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 39] INTERNET-DRAFT NAT MIB September 2003 natStatsAddrMapAddrUsed OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of addresses, pertaining to this address map, that are currently being used from the nat pool. The value of this object is irrelevant if the address map in question is a static address map." ::= { natStatsAddrMapEntry 6 } -- -- The Stats Interface table -- natStatsInterfaceTable OBJECT-TYPE SYNTAX SEQUENCE OF NatStatsInterfaceEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "This table provides statistics information per interface." ::= { natStatistics 3 } natStatsInterfaceEntry OBJECT-TYPE SYNTAX NatStatsInterfaceEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "Each entry of the natStatsInterfaceTable represents stats pertaining to one interface, which is identified by its ifIndex." AUGMENTS { natConfInterfaceEntry } ::= { natStatsInterfaceTable 1 } NatStatsInterfaceEntry ::= SEQUENCE { natStatsInterfacePktsIn Counter64, natStatsInterfacePktsOut Counter64 } natStatsInterfacePktsIn OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of packets received on this interface that were translated." ::= { natStatsInterfaceEntry 1 } Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 40] INTERNET-DRAFT NAT MIB September 2003 natStatsInterfacePktsOut OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of translated packets that were sent out this interface." ::= { natStatsInterfaceEntry 2 } -- -- Notifications section -- natNotificationPrefix OBJECT IDENTIFIER ::= { natMIB 2 } natNotifications OBJECT IDENTIFIER ::= { natNotificationPrefix 0 } -- -- Notification objects i.e. objects accessible only for notification -- purpose. -- natNotificationObjects OBJECT IDENTIFIER ::= { natNotificationPrefix 1 } natAddrMapName OBJECT-TYPE SYNTAX SnmpAdminString MAX-ACCESS accessible-for-notify STATUS current DESCRIPTION "This object represent the address map corresponding to which the addresses/ports have been exhausted, thereby resulting in a natPacketDiscard notification." ::= { natNotificationObjects 1 } natPktDiscardReason OBJECT-TYPE SYNTAX INTEGER { other (1), addressSpaceExhausted (2) } MAX-ACCESS accessible-for-notify STATUS current DESCRIPTION "This object represents the reason for which a packet is discarded by NAT. addressSpaceExhausted (2) represents a situation wherein the address space required to do this mapping has been exhausted (used up by other translations). Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 41] INTERNET-DRAFT NAT MIB September 2003 other (1) represents a case where the packet was discarded due to any other reasons." ::= { natNotificationObjects 2 } -- -- Notifications -- natAddressUseRising NOTIFICATION-TYPE OBJECTS { natStatsAddrMapAddrUsed } STATUS current DESCRIPTION "This notification is generated whenever the number of addresses per address map is equal to or greater than the configured address rising threshold value. Note that once this notification is generated, another notification for the same address map should be generated only after the address usage falls to/below the defined falling threshold. This notification should be generated only for dynamic address maps, since they do not provide any useful information for static maps." ::= { natNotifications 1 } natPacketDiscard NOTIFICATION-TYPE OBJECTS { natAddrMapName, natPktDiscardReason } STATUS current DESCRIPTION "This notification is generated whenever packets are discarded e.g. due to lack of mapping space when we run out of address/ports in case of Basic NAT/NAPT respectively. An agent should not generate more than one natPacketDiscard 'notification-events' in a given time interval (five seconds is the suggested default). A 'notification-event' is the transmission of a single trap or inform PDU to a list of notification destinations. If additional nat packets are discarded within the throttling period, then notification-events for these changes should be suppressed by the agent until the current throttling period expires. At the end of a throttling period, one notification-event should be generated if any NAT packet was discarded since the start of the throttling period. In such a case, another throttling period is started right away." ::= { natNotifications 2 } Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 42] INTERNET-DRAFT NAT MIB September 2003 -- -- Conformance information. -- natMIBConformance OBJECT IDENTIFIER ::= { natMIB 3 } natMIBGroups OBJECT IDENTIFIER ::= { natMIBConformance 1 } natMIBCompliances OBJECT IDENTIFIER ::= { natMIBConformance 2 } -- -- Units of conformance -- natConfigGroup OBJECT-GROUP OBJECTS { natConfInterfaceRealm, natConfServiceType, natConfAddrMapConfigName, natConfStorageType, natConfRowStatus, natConfAddrMapOwnerId, natConfAddrMapGroupId, natConfAddrMapEntryType, natConfAddrMapTranslationEntity, natConfLocalAddrType, natConfLocalAddrFrom, natConfLocalAddrTo, natConfLocalPortFrom, natConfLocalPortTo, natConfGlobalAddrType, natConfGlobalAddrFrom, natConfGlobalAddrTo, natConfGlobalPortFrom, natConfGlobalPortTo, natConfProtocol, natConfAddrMapStorageType, natConfAddrMapRowStatus, natConfUdpDefIdleTimeout, natConfIcmpDefIdleTimeout, natConfOtherDefIdleTimeout, natConfTcpDefIdleTimeout, natConfTcpDefNegTimeout } STATUS current DESCRIPTION "A collection of configuration-related information required to support management of devices supporting NAT." ::= { natMIBGroups 1 } Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 43] INTERNET-DRAFT NAT MIB September 2003 natTranslationGroup OBJECT-GROUP OBJECTS { natAddrBindNumberOfEntries, natAddrBindOwnerId, natAddrBindGroupId, natAddrBindGlobalAddrType, natAddrBindGlobalAddr, natAddrBindId, natAddrBindDirection, natAddrBindType, natAddrBindAddrMapName, natAddrBindSessionCount, natAddrBindMaxIdleTime, natAddrBindCurrentIdleTime, natAddrBindInTranslate, natAddrBindOutTranslate, natAddrBindRowStatus, natAddrPortBindNumberOfEntries, natAddrPortBindOwnerId, natAddrPortBindGroupId, natAddrPortBindGlobalAddrType, natAddrPortBindGlobalAddr, natAddrPortBindGlobalPort, natAddrPortBindId, natAddrPortBindDirection, natAddrPortBindType, natAddrPortBindAddrMapName, natAddrPortBindSessionCount, natAddrPortBindMaxIdleTime, natAddrPortBindCurrentIdleTime, natAddrPortBindInTranslate, natAddrPortBindOutTranslate, natAddrPortBindRowStatus, natSessionOwnerId, natSessionGroupId, natSessionDirection, natSessionUpTime, natSessionProtocolType, natSessionOrigPrivateAddrType, natSessionOrigPrivateAddr, natSessionTransPrivateAddrType, natSessionTransPrivateAddr, natSessionOrigPrivatePort, natSessionTransPrivatePort, natSessionOrigPublicAddrType, natSessionOrigPublicAddr, natSessionTransPublicAddrType, natSessionTransPublicAddr, natSessionOrigPublicPort, natSessionTransPublicPort, natSessionMaxIdleTime, Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 44] INTERNET-DRAFT NAT MIB September 2003 natSessionCurrentIdleTime, natSessionSecondBindId, natSessionInTranslate, natSessionOutTranslate, natSessionRowStatus } STATUS current DESCRIPTION "A collection of BIND-related objects required to support management of devices supporting NAT." ::= { natMIBGroups 2 } natStatsInterfaceGroup OBJECT-GROUP OBJECTS { natStatsInterfacePktsIn, natStatsInterfacePktsOut } STATUS current 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 { natStatsProtocolInTranslate, natStatsProtocolOutTranslate, natStatsProtocolRejectCount } STATUS current DESCRIPTION "A collection of protocol specific NAT statistics, to aid troubleshooting/monitoring of NAT operation." ::= { natMIBGroups 4 } natStatsAddrMapGroup OBJECT-GROUP OBJECTS { natStatsAddrMapInTranslate, natStatsAddrMapOutTranslate, natStatsAddrMapNoResource, natStatsAddrMapAddrUsed } STATUS current DESCRIPTION "A collection of address map specific NAT statistics, to aid troubleshooting/monitoring of NAT operation." ::= { natMIBGroups 5 } natMIBNotifConfigGroup OBJECT-GROUP OBJECTS { natConfAddrRiseThreshold, natConfAddrFallThreshold } STATUS current DESCRIPTION "A collection of configuration objects required to support the threshold-based notifications." ::= { natMIBGroups 6 } Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 45] INTERNET-DRAFT NAT MIB September 2003 natMIBNotificationObjectsGroup OBJECT-GROUP OBJECTS { natAddrMapName, natPktDiscardReason } STATUS current DESCRIPTION "A collection of objects required to support NAT notifications." ::= { natMIBGroups 7 } natMIBNotificationGroup NOTIFICATION-GROUP NOTIFICATIONS { natAddressUseRising, natPacketDiscard } STATUS current DESCRIPTION "A collection of notifications which are generated by devices supporting this MIB." ::= { natMIBGroups 8 } -- -- Compliance statements -- natMIBFullCompliance MODULE-COMPLIANCE STATUS current DESCRIPTION "When this MIB is implemented with support for read-create,then such an implementation can claim full or MIDCOM compliance. Such devices can then be both monitored and configured with this MIB." MODULE -- this module MANDATORY-GROUPS { natConfigGroup, natTranslationGroup, natStatsInterfaceGroup } GROUP natStatsAddrMapGroup DESCRIPTION "This group is optional." GROUP natMIBNotifConfigGroup DESCRIPTION "This group is optional." GROUP natMIBNotificationObjectsGroup DESCRIPTION "This group is optional." GROUP natMIBNotificationGroup DESCRIPTION "This group is optional." GROUP natTranslationGroup DESCRIPTION "Write access to this group is mandatory for MIDCOM compliance." Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 46] INTERNET-DRAFT NAT MIB September 2003 OBJECT natConfInterfaceRealm MIN-ACCESS read-only DESCRIPTION "Write access is not required." OBJECT natConfRowStatus SYNTAX RowStatus { active(1) } WRITE-SYNTAX RowStatus { createAndGo(4), destroy(6) } DESCRIPTION "Support for createAndWait and notInService is not required." OBJECT natConfAddrMapOwnerId MIN-ACCESS read-only DESCRIPTION "Object is only required for MIDCOM compliance." OBJECT natConfAddrMapGroupId MIN-ACCESS read-only DESCRIPTION "Object is only required for MIDCOM compliance." OBJECT natConfAddrMapRowStatus SYNTAX RowStatus { active(1) } WRITE-SYNTAX RowStatus { createAndGo(4), destroy(6) } DESCRIPTION "Support for createAndWait and notInService is not required." OBJECT natAddrBindOwnerId MIN-ACCESS read-only DESCRIPTION "Object is only required for MIDCOM compliance." OBJECT natAddrBindGroupId MIN-ACCESS read-only DESCRIPTION "Object is only required for MIDCOM compliance." OBJECT natAddrBindRowStatus SYNTAX RowStatus { active(1) } WRITE-SYNTAX RowStatus { createAndGo(4), destroy(6) } DESCRIPTION "Support for createAndWait and notInService is not required." OBJECT natAddrPortBindOwnerId MIN-ACCESS read-only DESCRIPTION "Object is only required for MIDCOM compliance." Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 47] INTERNET-DRAFT NAT MIB September 2003 OBJECT natAddrPortBindGroupId MIN-ACCESS read-only DESCRIPTION "Object is only required for MIDCOM compliance." OBJECT natAddrPortBindRowStatus SYNTAX RowStatus { active(1) } WRITE-SYNTAX RowStatus { createAndGo(4), destroy(6) } DESCRIPTION "Support for createAndWait and notInService is not required." OBJECT natSessionOwnerId MIN-ACCESS read-only DESCRIPTION "Object is only required for MIDCOM compliance." OBJECT natSessionGroupId MIN-ACCESS read-only DESCRIPTION "Object is only required for MIDCOM compliance." OBJECT natSessionRowStatus SYNTAX RowStatus { active(1) } WRITE-SYNTAX RowStatus { createAndGo(4), destroy(6) } DESCRIPTION "Support for createAndWait and notInService is not required." OBJECT natConfStorageType MIN-ACCESS read-only DESCRIPTION "Write Access is not required." OBJECT natConfAddrMapStorageType MIN-ACCESS read-only DESCRIPTION "Write Access is not required." ::= { natMIBCompliances 1 } natMIBReadOnlyCompliance MODULE-COMPLIANCE STATUS current 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 can not be configured with this MIB." Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 48] INTERNET-DRAFT NAT MIB September 2003 MODULE -- this module MANDATORY-GROUPS { natConfigGroup, natTranslationGroup, natStatsInterfaceGroup } GROUP natStatsAddrMapGroup DESCRIPTION "This group is optional." GROUP natMIBNotifConfigGroup DESCRIPTION "This group is optional." GROUP natMIBNotificationObjectsGroup DESCRIPTION "This group is optional." GROUP natMIBNotificationGroup DESCRIPTION "This group is optional." OBJECT natConfAddrMapOwnerId MIN-ACCESS read-only DESCRIPTION "Object is only required for MIDCOM compliance." OBJECT natConfAddrMapGroupId MIN-ACCESS read-only DESCRIPTION "Object is only required for MIDCOM compliance." OBJECT natAddrBindOwnerId MIN-ACCESS read-only DESCRIPTION "Object is only required for MIDCOM compliance." OBJECT natAddrBindGroupId MIN-ACCESS read-only DESCRIPTION "Object is only required for MIDCOM compliance." OBJECT natAddrPortBindOwnerId MIN-ACCESS read-only DESCRIPTION "Object is only required for MIDCOM compliance." OBJECT natAddrPortBindGroupId MIN-ACCESS read-only DESCRIPTION "Object is only required for MIDCOM compliance." OBJECT natSessionOwnerId MIN-ACCESS read-only DESCRIPTION "Object is only required for MIDCOM compliance." Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 49] INTERNET-DRAFT NAT MIB September 2003 OBJECT natSessionGroupId MIN-ACCESS read-only DESCRIPTION "Object is only required for MIDCOM compliance." ::= { natMIBCompliances 2 } END Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 50] INTERNET-DRAFT NAT MIB September 2003 6. Intellectual Property The IETF takes no position regarding the validity or scope of any intellectual property or other rights that might be claimed to pertain to the implementation or use of the technology described in this document or the extent to which any license under such rights might or might not be available; neither does it represent that it has made any effort to identify any such rights. Information on the IETF's procedures with respect to rights in standards-track and standards-related documentation can be found in BCP-11. Copies of claims of rights made available for publication and any assurances of licenses to be made available, or the result of an attempt made to obtain a general license or permission for the use of such proprietary rights by implementers or users of this specification can be obtained from the IETF Secretariat. The IETF invites any interested party to bring to its attention any copyrights, patents or patent applications, or other proprietary rights that may cover technology that may be required to practice this standard. Please address the information to the IETF Executive Director. 7. Change History A record of changes which will be removed before publication. 10 September 2001 o Added the following objects to support notifications: natConfAddrRiseThreshold, natConfAddrFallThreshold, natAddrMapName and natPktDiscardReason. o Following notifications were added (there are still some unclear parameters though): natAddressUseRising and natPacketDiscard. 10 November 2001 o Dynamic and Static Address Map tables are Merged. o Protocol Extensibility added. o Rearrangement of OIDs done to get things in proper sequence. Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 51] INTERNET-DRAFT NAT MIB September 2003 07 February 2002 o Config and Interface Specific tables are Merged. o MAX-ACCESS for the bind and session entry objects are changed to be read-create. o natConfAddrMapType renamed to natConfAddrMapDirection. 14 June 2002 o Changed the syntax of natConfServiceType to BITS and renumbered the enumeration to start with 0. o Addressed the warning raised by smilint - all InetAddress values now restricted to the size range (0..20) i.e. valid InetAddress types are now ipv4, ipv6, ipv4z and ipv6z. o MIN-ACCESS for natConfInterfaceRealm restricted to read-only. o Changed the natConfIcmpDefIdleTimeout default value to be 300. o natConfProtConfigName made a part of the optional natConfProtGroup. o RFC 3291 now referred to instead of RFC 2578 2 Nov 2002 o Added the Bind Origin Objects. o Updated the description of natSessionSecondBindId. o Interface specific statistics made mandatory. o New sections, 4.1, 4.2 and 4.3 added indicating relationship between tables and configuration guidelines. 02 Sep 2003 o Removed the protocol extensibility. o Incorporated other comments. Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 52] INTERNET-DRAFT NAT MIB September 2003 8. Acknowledgements The authors of this memo would like to thank Randy Turner, Ashwini S T, Kevin Luehrs, Sam Sankoorikal and Juergen Quittek for their valuable feedback. 9. IANA Considerations Several specific values for MIB objects require completion before this memo can advance to RFC status. These are: o OID value for "natMib" see MODULE-IDENTITY Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 53] INTERNET-DRAFT NAT MIB September 2003 10. Security Considerations This MIB contains readable objects whose values provide information related to nat binds and sessions. Some of these objects could contain sensitive information e.g. bind information. There are a number of management objects defined in this MIB that have a MAX-ACCESS clause of read-write and/or read-create. Such objects may be considered sensitive or vulnerable in some network environments. While unauthorized access to the readable objects may be relatively innocuous, 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. 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). 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. Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 54] INTERNET-DRAFT NAT MIB September 2003 11. References 11.1. Normative References [RFC2578] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M. and S. Waldbusser, "Structure of Management Information Version 2 (SMIv2)", STD 58, RFC 2578, April 1999. [RFC2579] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M. and S. Waldbusser, "Textual Conventions for SMIv2", STD 58, RFC 2579, April 1999. [RFC2580] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M. and S. Waldbusser, "Conformance Statements for SMIv2", STD 58, RFC 2580, April 1999. [RFC3022] Srisuresh, P. and Egevang, K., "Traditional IP Network Address Translator (Traditional NAT)", RFC 3022, January 2001. [RFC2663] Srisuresh, P. and M. Holdrege, "NAT Terminology and Considerations", RFC 2663, August 1999. [RFC3291] Daniele, M., Haberman, B., Routhier, S., Schoenwaelder, J., "Textual Conventions for Internet Network Addresses", RFC 3291, May 2002. 11.2. 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. 12. Author's Addresses R. Rohit Mascon Global Limted #59/2 100 ft Ring Road Banashankari II Stage Bangalore 560 070 India Phone: +91 80 679 6227 Email: rrohit74@hotmail.com Nalinaksh Pai Cisco Systems, Inc. Prestige Waterford No. 9, Brunton Road Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 55] INTERNET-DRAFT NAT MIB September 2003 Bangalore - 560 025 India Phone: +91 80 532 1300 extn. 6354 Email: npai@cisco.com Rajiv Raghunarayan Cisco Systems Inc. 170 West Tasman Drive San Jose, CA 95134 Phone: +1 408 853 9612 Email: raraghun@cisco.com Cliff Wang Information Security Bank One Corp 1111 Polaris Pkwy Columbus, OH 43240 Phone: +1 614 213 6117 Email: cliffwang2000@yahoo.com P. Srisuresh Caymas Systems, Inc. 1179-A North McDowell Blvd. Petaluma, CA 94954 Tel: (707) 283-5063 Email: srisuresh@yahoo.com Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 56] INTERNET-DRAFT NAT MIB September 2003 13. Full Copyright Statement "Copyright (C) The Internet Society (2003). All Rights Reserved. This document and translations of it may be copied and furnished to others, and derivative works that comment on or otherwise explain it or assist in its implementation may be prepared, copied, published and distributed, in whole or in part, without restriction of any kind, provided that the above copyright notice and this paragraph are included on all such copies and derivative works. However, this document itself may not be modified in any way, such as by removing the copyright notice or references to the Internet Society or other Internet organizations, except as needed for the purpose of developing Internet standards in which case the procedures for copyrights defined in the Internet Standards process must be followed, or as required to translate it into languages other than English. The limited permissions granted above are perpetual and will not be revoked by the Internet Society or its successors or assigns. This document and the information contained herein is provided on an "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Acknowledgement Funding for the RFC Editor function is currently provided by the Internet Society. Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 57]