NAT Working Group R. Raghunarayan
INTERNET-DRAFT N. Pai
Expires April 2004 Cisco Systems, Inc.
R. Rohit
Mascon Global Limited
C. Wang
Bank One Corp
P. Srisuresh
Caymas Systems, Inc.
October 2003
Definitions of Managed Objects for Network Address Translators (NAT)
<draft-ietf-nat-natmib-07.txt>
Status of this Memo
This document is an Internet-Draft and is in full conformance with
all provisions of Section 10 of RFC2026.
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
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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. This MIB may be used for
configuration as well as monitoring of a device capable of
NAT function.
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Table of Contents
1 Introduction ..................................................2
2 The Internet-Standard Management Framework ....................2
3 Terminology ...................................................2
4 Overview ......................................................3
4.1 Relation between the NAT configuration tables.................4
4.2 Relation between the translation and the configuration tables.4
4.3 Configuration via the MIB.....................................5
4.4 Relationship to Interface MIB.................................6
5 Definitions ...................................................6
6 Intellectual Property.........................................52
7 Change History................................................53
8 Acknowledgements .............................................54
10 Security Considerations ......................................55
11 References ...................................................56
12 Author's Addresses ...........................................57
13 Full Copyright Statement......................................58
1. Introduction
This memo defines an SMIv2 Management Information Base (MIB) for
a device implementing NAT [RFC3022] function. This may be used
for configuration as well as monitoring of a device capable
of 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 [RFC2663]. Definition for the term "Symmetric NAT" may be found
in RFC 3489 [RFC3489]. Symmetric NAT is a variation of NAPT in that
a address-port bind is not retained across multiple sessions from
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the same private source port. The term "NAT session" is used
extensively in the document and may be defined as follows.
NAT Session - A NAT session is an association between a session
as seen in the private realm and a session as seen in the public
realm, by virtue of NAT translation. If a session in the private
realm were to be represented as (PrivateSrcAddr, PrivateDstAddr,
TransportProtocol, PrivateSrcPort, PrivateDstPort) and the
same session in the public realm were to be represented as
(PublicSrcAddr, PublicDstAddr, TransportProtocol, PublicSrcPort,
PublicDstPort), the NAT session will provide the translation
glue between the two session representations.
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 NAT MIB module for some parts depends on the IF-MIB [RFC2863].
The MIB module is split into three groups as follows.
o the configuration group,
o the translation group, and
o the statistics group.
The configuration group consists of two tables and seven scalars:
o natConfInterfaceTable - the interface specific configuration
table, which specifies the NAT config parameters for a specific
interface.
o natConfAddrMapTable - 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.
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
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that currently exist in the Address bind and the Address-Port
bind tables respectively.
o natAddrBindTable - the Address bind table, which holds the
currently active address bindings.
o natAddrPortBindTable - the Address-Port bind table, which
holds the currently active transport bindings.
o natSessionTable - the session table, holds information regarding
active NAT sessions.
And finally, the statistics group consists of three tables:
o natStatsProtocolTable - the Protocol stats table, indicating
translation statistics per protocol.
o natStatsAddrMapTable - the Address Map stats table, indicating
translation statistics per address map.
o natStatsInterfaceTable - the Interface stats table, indicating
translation statistics per interface.
There is also one notification defined in the MIB:
o 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.
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Address map
|
|
|
----------------------------------------------
| |
| |
| |
Address Bind Address Port Bind
| |
| |
| |
----------------------------------------------
|
|
|
Session
Every bind, address as well as address-port bind, is derived
from an address map. The ifIndex inconjunction with the
natAddrBindMapIndex or natAddrPortBindMapIndex object
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
natSessionPrivateSrcEPBindId and the
natSessionPrivateDstEPBindId 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 (except in the case
of Symmetric NAT) 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 address map entry in the natConfAddrMapTable,
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- Create an entry in the natConfInterfaceTable specifying the
the value of ifIndex as the interface index of the interface
on which NAT is being configured.
Set natConfAddrMapConfigName to the name of the address map
entry already created.
Specify appropriate values, as applicable, for the other
objects e.g. natConfInterfaceRealm, natConfServiceType, in the
table.
- To configure NAT for TCP, UDP and ICMP protocols, the
management station can set the protocol specific scalars.
- The Address Bind and Address-Port Bind 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.
4.4 Relationship to Interface MIB
The natConfInterfaceTable specifies the NAT configuration attributes
on each interface. The concept of "interface" is as defined by
InterfaceIndex/ifIndex of the IETF Interfaces MIB [IF-MIB].
5. Definitions
NAT-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY,
OBJECT-TYPE,
Unsigned32,
Gauge32,
Counter64,
TimeTicks,
mib-2,
NOTIFICATION-TYPE
FROM SNMPv2-SMI
TimeInterval,
TEXTUAL-CONVENTION
FROM SNMPv2-TC
MODULE-COMPLIANCE,
NOTIFICATION-GROUP,
OBJECT-GROUP
FROM SNMPv2-CONF
StorageType,
RowStatus
FROM SNMPv2-TC
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ifIndex
FROM IF-MIB
SnmpAdminString
FROM SNMP-FRAMEWORK-MIB
InetAddressType,
InetAddress,
InetPortNumber
FROM INET-ADDRESS-MIB;
natMIB MODULE-IDENTITY
LAST-UPDATED "200310070000Z"
ORGANIZATION "IETF MIDCOM 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
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P. Srisuresh
Caymas Systems, Inc.
1179-A North McDowell Blvd.
Petaluma, CA 94954
Tel: (707) 283-5063
Email: srisuresh@yahoo.com
Middlebox Communication Working Group:
midcom@ietf.org
"
DESCRIPTION
"This MIB module defines the generic managed objects
for NAT."
REVISION "200310070000Z" -- 7th Oct. 2003
DESCRIPTION
"This revision addressed comments raised by the
MIDCOM Working Group."
REVISION "200308200000Z" -- 20th Aug. 2003
DESCRIPTION
"This revision removed the protocol extensibility
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, published as RFC yyyy."
-- RFC Ed.: replace yyyy with actual RFC number & remove this note
::= { mib-2 XXX } -- RFC Ed.: replace XXX with IANA-assigned
-- number & remove this note
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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
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 current
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)
}
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NatAddrMapId ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"A unique id that is assigned to each address map
by a NAT enabled device."
SYNTAX Unsigned32 (1..4294967295)
NatBindIdOrZero ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"A unique id that is assigned to each bind by
a NAT enabled device. The bind id will be zero
in case of a Symmetric NAT."
SYNTAX Unsigned32 (0..4294967295)
NatBindId ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"A unique id that is assigned to each bind by
a NAT enabled device."
SYNTAX Unsigned32 (1..4294967295)
NatSessionId ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"A unique id that is assigned to each session by
a NAT enabled device."
SYNTAX Unsigned32 (1..4294967295)
NatBindMode ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"An indication whether the bind is
an address bind or an address-port bind."
SYNTAX INTEGER {
addressBind (1),
addressPortBind (2)
}
NatBindType ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"An indication whether the bind is
static or dynamic."
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SYNTAX INTEGER {
static (1),
dynamic (2)
}
NatTranslationEntity ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"An indication for the direction of a session for
which a) an address map entry, address bind or port
bind is applicable, and b) the entity (source or
detination) within the session that is subject to
translation."
SYNTAX BITS {
inboundSrcEndPoint (0),
outboundDstEndPoint(1),
inboundDstEndPoint (2),
outboundSrcEndPoint(3)
}
--
-- UDP related NAT configuration
--
natConfUdpDefIdleTimeout OBJECT-TYPE
SYNTAX Unsigned32 (1..4294967295)
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 Unsigned32 (1..4294967295)
UNITS "seconds"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The default ICMP idle timeout parameter."
DEFVAL { 300 }
::= { natConfig 2 }
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--
-- Other protocol parameters
--
natConfOtherDefIdleTimeout OBJECT-TYPE
SYNTAX Unsigned32 (1..4294967295)
UNITS "seconds"
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 Unsigned32 (1..4294967295)
UNITS "seconds"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The default time interval a NAT session for an
established TCP connection is allowed to remain
valid without any activity on the TCP connection."
DEFVAL { 86400 }
::= { natConfig 4 }
natConfTcpDefNegTimeout OBJECT-TYPE
SYNTAX Unsigned32 (1..4294967295)
UNITS "seconds"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The default time interval a NAT session for a TCP
connection which is not in the established state
is allowed to remain valid without any activity on
the TCP connection."
DEFVAL { 60 }
::= { natConfig 5 }
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--
-- The Configuration Group
--
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 6 }
natConfInterfaceEntry OBJECT-TYPE
SYNTAX NatConfInterfaceEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Each entry in the natConfInterfaceTable holds a set of
configuration parameters for an interface, instantiated by
ifIndex. Therefore, the interface index must have been
assigned, according to the procedures applicable to that,
before it can be meaningfully used.
Generally, this means that the interface must exist.
When natConfStorageType is of type nonVolatile, however,
this may reflect the configuration for an interface whose
ifIndex has been assigned but for which the supporting
implementation is not currently present."
INDEX { ifIndex }
::= { natConfInterfaceTable 1 }
NatConfInterfaceEntry ::= SEQUENCE {
natConfInterfaceRealm INTEGER,
natConfServiceType BITS,
natConfAddrMapConfigName SnmpAdminString,
natConfStorageType StorageType,
natConfRowStatus RowStatus
}
natConfInterfaceRealm OBJECT-TYPE
SYNTAX INTEGER {
private (1),
public (2)
}
MAX-ACCESS read-create
STATUS current
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DESCRIPTION
"This object identifies whether this interface is
connected to the private or the public realm."
DEFVAL { public }
::= { natConfInterfaceEntry 1 }
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 2 }
natConfAddrMapConfigName OBJECT-TYPE
SYNTAX SnmpAdminString (SIZE(1..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.
An address map must not be reused across different
interfaces. Address map entries contain addresses
specific to an interface."
::= { natConfInterfaceEntry 3 }
natConfStorageType OBJECT-TYPE
SYNTAX StorageType
MAX-ACCESS read-create
STATUS current
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 }
::= { natConfInterfaceEntry 4 }
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natConfRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The status of this conceptual row.
Until instances of all corresponding columns are
appropriately configured, the value of the
corresponding instance of the natConfRowStatus
column is 'notReady'.
In particular, a newly created row cannot be made
active until the corresponding instances of
natConfServiceType and natConfAddrMapConfigName
have 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."
::= { natConfInterfaceEntry 5 }
--
-- 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 7 }
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 NatAddrMapId,
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natConfAddrMapEntryType INTEGER,
natConfAddrMapTranslationEntity NatTranslationEntity,
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 NatAddrMapId
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 }
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 3 }
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natConfAddrMapTranslationEntity OBJECT-TYPE
SYNTAX NatTranslationEntity
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.
NAT address (and Transport-ID) maps may be defined
to effect inbound or outbound sessions.
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 outboundSrcEndPoint 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 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."
::= { natConfAddrMapEntry 4 }
natConfLocalAddrType OBJECT-TYPE
SYNTAX InetAddressType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object specifies the address type used for
natConfLocalAddrFrom and natConfLocalAddrTo."
::= { natConfAddrMapEntry 5 }
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."
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::= { natConfAddrMapEntry 6 }
natConfLocalAddrTo 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 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 7 }
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 8 }
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 9 }
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natConfGlobalAddrType OBJECT-TYPE
SYNTAX InetAddressType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object specifies the address type used for
natConfGlobalAddrFrom and natConfGlobalAddrTo."
::= { natConfAddrMapEntry 10 }
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 11 }
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 12 }
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 13 }
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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
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 14 }
natConfProtocol OBJECT-TYPE
SYNTAX NATProtocolMap
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object specifies a bitmap of protocol identifiers."
::= { natConfAddrMapEntry 15 }
natConfAddrMapStorageType OBJECT-TYPE
SYNTAX StorageType
MAX-ACCESS read-create
STATUS current
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 }
::= { natConfAddrMapEntry 16 }
natConfAddrMapRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The status of this conceptual row.
Until instances of all corresponding columns are
appropriately configured, the value of the
corresponding instance of the natConfAddrMapRowStatus
column is 'notReady'.
None of the objects in this row may be modified
while the value of this object is active(1)."
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REFERENCE
"Textual Conventions for SMIv2, Section 2."
::= { natConfAddrMapEntry 17 }
--
-- 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. These entries are lost
upon agent restart."
INDEX { ifIndex, natAddrBindLocalAddrType, natAddrBindLocalAddr }
::= { natAddrBindTable 1 }
NatAddrBindEntry ::= SEQUENCE {
natAddrBindLocalAddrType InetAddressType,
natAddrBindLocalAddr InetAddress,
natAddrBindGlobalAddrType InetAddressType,
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natAddrBindGlobalAddr InetAddress,
natAddrBindId NatBindId,
natAddrBindTranslationEntity NatTranslationEntity,
natAddrBindType NatBindType,
natAddrBindMapIndex NatAddrMapId,
natAddrBindSessionCount Gauge32,
natAddrBindMaxIdleTime TimeInterval,
natAddrBindCurrentIdleTime TimeTicks,
natAddrBindInTranslates Counter64,
natAddrBindOutTranslates 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 }
natAddrBindGlobalAddrType OBJECT-TYPE
SYNTAX InetAddressType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object specifies the address type used for
natAddrBindGlobalAddr."
::= { natAddrBindEntry 3 }
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 4 }
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natAddrBindId OBJECT-TYPE
SYNTAX NatBindId
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 5 }
natAddrBindTranslationEntity OBJECT-TYPE
SYNTAX NatTranslationEntity
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object represents the direction of sessions
for which this bind is applicable and the entity
(source or detination) 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 inboundDestEndPoint)."
::= { natAddrBindEntry 6 }
natAddrBindType OBJECT-TYPE
SYNTAX NatBindType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object indicates whether the bind is static or
dynamic."
::= { natAddrBindEntry 7 }
natAddrBindMapIndex OBJECT-TYPE
SYNTAX NatAddrMapId
MAX-ACCESS read-create
STATUS current
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DESCRIPTION
"This object is a pointer to the natConfAddrMapTable entry
(and the parameters of that entry) which was used in
creating this BIND. This object, in conjuction with the
ifIndex (which identifies a unique addrMapName) points to
a unique entry in the natConfAddrMapTable. If the bind
is being created by the Management Station, then it
should set the value for this object to point to an
existing address map entry. An attempt to set this object
to a nonExistent address map entry will result in an
inconsistentValue error."
::= { natAddrBindEntry 8 }
natAddrBindSessionCount OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Number of sessions currently using this BIND."
::= { natAddrBindEntry 9 }
natAddrBindMaxIdleTime OBJECT-TYPE
SYNTAX TimeInterval
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 10 }
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 11 }
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natAddrBindInTranslates 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 12 }
natAddrBindOutTranslates 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 13 }
natAddrBindRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The status of this conceptual row.
Until instances of all corresponding columns are
appropriately configured, the value of the
corresponding instance of the natAddrBindRowStatus
column is 'notReady'.
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 14 }
--
-- 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 }
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--
-- 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.
These entries are lost upon agent restart."
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 NatBindType,
natAddrPortBindMapIndex NatAddrMapId,
natAddrPortBindSessionCount Gauge32,
natAddrPortBindMaxIdleTime TimeInterval,
natAddrPortBindCurrentIdleTime TimeTicks,
natAddrPortBindInTranslates Counter64,
natAddrPortBindOutTranslates Counter64,
natAddrPortBindRowStatus RowStatus
}
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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 identifier in case of ICMP echo, Timestamp
and Information request messages, as defined in
RFC 792[RFC792], to match replies with requests) 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
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 }
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natAddrPortBindGlobalAddrType OBJECT-TYPE
SYNTAX InetAddressType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object specifies the address type used for
natAddrPortBindGlobalAddr."
::= { natAddrPortBindEntry 5 }
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."
::= { natAddrPortBindEntry 6 }
natAddrPortBindGlobalPort OBJECT-TYPE
SYNTAX InetPortNumber
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object represents the port number (or query
identifier in case of ICMP messages, please refer
to RFC 792 [RFC792]) that, in conjunction with
natAddrPortBindGlobalAddr, maps to the private-realm
network layer address and transport id represented by
natAddrPortBindLocalAddr and natAddrPortBindLocalPort
respectively."
::= { natAddrPortBindEntry 7 }
natAddrPortBindId OBJECT-TYPE
SYNTAX NatBindId
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 8 }
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natAddrPortBindTranslationEntity OBJECT-TYPE
SYNTAX NatTranslationEntity
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object represents the direction of sessions
for which this bind is applicable and the entity
(source or detination) 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 inboundDestEndPoint)."
::= { natAddrPortBindEntry 9 }
natAddrPortBindType OBJECT-TYPE
SYNTAX NatBindType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object indicates whether the bind is static or
dynamic."
::= { natAddrPortBindEntry 10 }
natAddrPortBindMapIndex OBJECT-TYPE
SYNTAX NatAddrMapId
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. This object, in conjuction with the
ifIndex (which identifies a unique addrMapName) points to
a unique entry in the natConfAddrMapTable. If the bind
is being created by the Management Station, then it
should set the value for this object to point to an
existing address map entry. An attempt to set this object
to a nonExistent address map entry will result in an
inconsistentValue error."
::= { natAddrPortBindEntry 11 }
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natAddrPortBindSessionCount OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Number of sessions currently using this BIND."
::= { natAddrPortBindEntry 12 }
natAddrPortBindMaxIdleTime OBJECT-TYPE
SYNTAX TimeInterval
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 13 }
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 14 }
natAddrPortBindInTranslates 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 15 }
natAddrPortBindOutTranslates 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 16 }
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natAddrPortBindRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The status of this conceptual row.
Until instances of all corresponding columns are
appropriately configured, the value of the
corresponding instance of the natAddrBindRowStatus
column is 'notReady'.
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 17 }
--
-- 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
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 NatBindId,
natSessionPrivateDstEPBindMode NatBindMode,
natSessionDirection INTEGER,
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INTERNET-DRAFT NAT MIB October 2003
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 TimeInterval,
natSessionCurrentIdleTime TimeTicks,
natSessionInTranslates Counter64,
natSessionOutTranslates Counter64,
natSessionRowStatus RowStatus
}
natSessionIndex OBJECT-TYPE
SYNTAX NatSessionId
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The session ID for this NAT session."
::= { natSessionEntry 1 }
natSessionPrivateSrcEPBindId OBJECT-TYPE
SYNTAX NatBindIdOrZero
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The bind id associated between private and public
source end points. In the case of Symmetric-NAT,
this would be set to zero."
::= { natSessionEntry 2 }
natSessionPrivateSrcEPBindMode OBJECT-TYPE
SYNTAX NatBindMode
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object indicates whether the bind indicated
by the object natSessionPrivateSrcEPBindId
is an address bind or an address-port bind."
::= { natSessionEntry 3 }
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natSessionPrivateDstEPBindId OBJECT-TYPE
SYNTAX NatBindId
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The bind id associated between private and public
destination end points."
::= { natSessionEntry 4 }
natSessionPrivateDstEPBindMode OBJECT-TYPE
SYNTAX NatBindMode
MAX-ACCESS read-only
STATUS current
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-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 6 }
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 7 }
natSessionAddrMapIndex OBJECT-TYPE
SYNTAX NatAddrMapId
MAX-ACCESS read-create
STATUS current
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DESCRIPTION
"This object is a pointer to the natConfAddrMapTable entry
(and the parameters of that entry) which was used in
creating this session. This object, in conjuction with the
ifIndex (which identifies a unique addrMapName) points to
a unique entry in the natConfAddrMapTable. If the session
is being created by the Management Station, then it
should set the value for this object to point to an
existing address map entry. An attempt to set this object
to a nonExistent address map entry will result in an
inconsistentValue error."
::= { natSessionEntry 8 }
natSessionProtocolType OBJECT-TYPE
SYNTAX NATProtocolType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The protocol type of this session."
::= { natSessionEntry 9 }
natSessionPrivateAddrType OBJECT-TYPE
SYNTAX InetAddressType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object specifies the address type used for
natSessionPrivateAddr."
::= { natSessionEntry 10 }
natSessionPrivateSrcAddr OBJECT-TYPE
SYNTAX InetAddress (SIZE (0..20))
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The source IP address of the session endpoint that
lies in the private network."
::= { natSessionEntry 11 }
natSessionPrivateSrcPort OBJECT-TYPE
SYNTAX InetPortNumber
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The source 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 [RFC792].
The value of this object must be 0 when ports are not
involved in the translation."
::= { natSessionEntry 12 }
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natSessionPrivateDstAddr OBJECT-TYPE
SYNTAX InetAddress (SIZE (0..20))
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The destination IP address of the session endpoint that
lies in the private network."
::= { natSessionEntry 13 }
natSessionPrivateDstPort OBJECT-TYPE
SYNTAX InetPortNumber
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The destination 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 [RFC792].
The value of this object must be 0 when ports are not
involved in the translation."
::= { natSessionEntry 14 }
natSessionPublicAddrType OBJECT-TYPE
SYNTAX InetAddressType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object specifies the address type used for
natSessionPublicAddr."
::= { natSessionEntry 15 }
natSessionPublicSrcAddr OBJECT-TYPE
SYNTAX InetAddress (SIZE (0..20))
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The source IP address of the session endpoint that
lies in the public network."
::= { natSessionEntry 16 }
natSessionPublicSrcPort OBJECT-TYPE
SYNTAX InetPortNumber
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The source transport port of the session endpoint that
belongs to the public network. If this is an ICMP
session then the value is the ICMP request ID [RFC792].
The value of this object must be 0 when ports are not
involved in the translation."
::= { natSessionEntry 17 }
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natSessionPublicDstAddr OBJECT-TYPE
SYNTAX InetAddress (SIZE (0..20))
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The destination IP address of the session endpoint that
lies in the public network."
::= { natSessionEntry 18 }
natSessionPublicDstPort OBJECT-TYPE
SYNTAX InetPortNumber
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The destination transport port of the session endpoint
that belongs to the public network. If this is an ICMP
session then the value is the ICMP request ID [RFC792].
The value of this object must be 0 when ports are not
involved in the translation."
::= { natSessionEntry 19 }
natSessionMaxIdleTime OBJECT-TYPE
SYNTAX TimeInterval
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
DESCRIPTION
"The time since a packet belonging to this session was
last detected."
::= { natSessionEntry 21 }
natSessionInTranslates OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of inbound packets that were translated for
this session."
::= { natSessionEntry 22 }
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natSessionOutTranslates OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of outbound packets that were translated for
this session."
::= { natSessionEntry 23 }
natSessionRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The status of this conceptual row.
Until instances of all corresponding columns are
appropriately configured, the value of the
corresponding instance of the natConfRowStatus
column is '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 24 }
--
-- 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
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DESCRIPTION
"An entry (conceptual row) containing NAT statistics
pertaining to a particular protocol."
INDEX { natStatsProtocol }
::= { natStatsProtocolTable 1 }
NatStatsProtocolEntry ::= SEQUENCE {
natStatsProtocol NATProtocolType,
natStatsProtocolInTranslates Counter64,
natStatsProtocolOutTranslates Counter64,
natStatsProtocolRejectCount Counter64
}
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 }
natStatsProtocolInTranslates 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 }
natStatsProtocolOutTranslates 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."
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::= { 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."
::= { 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 {
natStatsAddrMapInTranslates Counter64,
natStatsAddrMapOutTranslates Counter64,
natStatsAddrMapNoResource Counter64,
natStatsAddrMapAddrUsed Gauge32
}
natStatsAddrMapInTranslates 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 }
natStatsAddrMapOutTranslates 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 }
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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 }
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 must always be zero in case of
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 }
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NatStatsInterfaceEntry ::= SEQUENCE {
natStatsInterfaceInTranslates Counter64,
natStatsInterfaceOutTranslates Counter64
}
natStatsInterfaceInTranslates OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Number of packets received on this interface that
were translated."
::= { natStatsInterfaceEntry 1 }
natStatsInterfaceOutTranslates 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
--
natMIBNotifications OBJECT IDENTIFIER ::= { natMIB 0 }
--
-- Notifications
--
natPacketDiscard NOTIFICATION-TYPE
OBJECTS { ifIndex }
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.
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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."
::= { natMIBNotifications 1 }
--
-- 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,
natConfAddrMapEntryType,
natConfAddrMapTranslationEntity,
natConfLocalAddrType,
natConfLocalAddrFrom,
natConfLocalAddrTo,
natConfLocalPortFrom,
natConfLocalPortTo,
natConfGlobalAddrType,
natConfGlobalAddrFrom,
natConfGlobalAddrTo,
natConfGlobalPortFrom,
natConfGlobalPortTo,
natConfProtocol,
natConfAddrMapStorageType,
natConfAddrMapRowStatus,
natConfUdpDefIdleTimeout,
natConfIcmpDefIdleTimeout,
natConfOtherDefIdleTimeout,
natConfTcpDefIdleTimeout,
natConfTcpDefNegTimeout }
STATUS current
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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,
natAddrBindSessionCount,
natAddrBindMaxIdleTime,
natAddrBindCurrentIdleTime,
natAddrBindInTranslates,
natAddrBindOutTranslates,
natAddrBindRowStatus,
natAddrPortBindNumberOfEntries,
natAddrPortBindGlobalAddrType,
natAddrPortBindGlobalAddr,
natAddrPortBindGlobalPort,
natAddrPortBindId,
natAddrPortBindTranslationEntity,
natAddrPortBindType,
natAddrPortBindMapIndex,
natAddrPortBindSessionCount,
natAddrPortBindMaxIdleTime,
natAddrPortBindCurrentIdleTime,
natAddrPortBindInTranslates,
natAddrPortBindOutTranslates,
natAddrPortBindRowStatus,
natSessionPrivateSrcEPBindId,
natSessionPrivateSrcEPBindMode,
natSessionPrivateDstEPBindId,
natSessionPrivateDstEPBindMode,
natSessionDirection,
natSessionUpTime,
natSessionAddrMapIndex,
natSessionProtocolType,
natSessionPrivateAddrType,
natSessionPrivateSrcAddr,
natSessionPrivateSrcPort,
natSessionPrivateDstAddr,
natSessionPrivateDstPort,
natSessionPublicAddrType,
natSessionPublicSrcAddr,
natSessionPublicSrcPort,
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natSessionPublicDstAddr,
natSessionPublicDstPort,
natSessionMaxIdleTime,
natSessionCurrentIdleTime,
natSessionInTranslates,
natSessionOutTranslates,
natSessionRowStatus }
STATUS current
DESCRIPTION
"A collection of BIND-related objects required to support
management of devices supporting NAT."
::= { natMIBGroups 2 }
natStatsInterfaceGroup OBJECT-GROUP
OBJECTS { natStatsInterfaceInTranslates,
natStatsInterfaceOutTranslates }
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 { natStatsProtocolInTranslates,
natStatsProtocolOutTranslates,
natStatsProtocolRejectCount }
STATUS current
DESCRIPTION
"A collection of protocol specific NAT statistics,
to aid troubleshooting/monitoring of NAT operation."
::= { natMIBGroups 4 }
natStatsAddrMapGroup OBJECT-GROUP
OBJECTS { natStatsAddrMapInTranslates,
natStatsAddrMapOutTranslates,
natStatsAddrMapNoResource,
natStatsAddrMapAddrUsed }
STATUS current
DESCRIPTION
"A collection of address map specific NAT statistics,
to aid troubleshooting/monitoring of NAT operation."
::= { natMIBGroups 5 }
natMIBNotificationGroup NOTIFICATION-GROUP
NOTIFICATIONS { natPacketDiscard }
STATUS current
DESCRIPTION
"A collection of notifications which are generated by
devices supporting this MIB."
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::= { natMIBGroups 6 }
--
-- 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 compliance. Such devices can then be both
monitored and configured with this MIB."
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."
GROUP natTranslationGroup
DESCRIPTION
"Write access to this group is not required."
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 natConfStorageType
MIN-ACCESS read-only
DESCRIPTION
"Write Access is not required."
OBJECT natConfLocalAddrType
SYNTAX InetAddressType { unknown(0), ipv4(1), ipv6(2) }
DESCRIPTION
"An implementation is only required to support IPv4
addresses."
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OBJECT natConfLocalAddrFrom
SYNTAX InetAddress (SIZE(0|4|16))
DESCRIPTION
"An implementation is only required to support IPv4
addresses."
OBJECT natConfLocalAddrTo
SYNTAX InetAddress (SIZE(0|4|16))
DESCRIPTION
"An implementation is only required to support IPv4
addresses."
OBJECT natConfGlobalAddrType
SYNTAX InetAddressType { unknown(0), ipv4(1), ipv6(2) }
DESCRIPTION
"An implementation is only required to support IPv4
addresses."
OBJECT natConfGlobalAddrFrom
SYNTAX InetAddress (SIZE(0|4|16))
DESCRIPTION
"An implementation is only required to support IPv4
addresses."
OBJECT natConfGlobalAddrTo
SYNTAX InetAddress (SIZE(0|4|16))
DESCRIPTION
"An implementation is only required to support IPv4
addresses."
OBJECT natConfAddrMapRowStatus
SYNTAX RowStatus { active(1) }
WRITE-SYNTAX RowStatus { createAndGo(4), destroy(6) }
DESCRIPTION
"Support for createAndWait and notInService is
not required."
OBJECT natConfAddrMapStorageType
MIN-ACCESS read-only
DESCRIPTION
"Write Access is not required."
OBJECT natAddrBindGlobalAddrType
SYNTAX InetAddressType { unknown(0), ipv4(1), ipv6(2) }
DESCRIPTION
"An implementation is only required to support IPv4
addresses."
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OBJECT natAddrBindGlobalAddr
SYNTAX InetAddress (SIZE(0|4|16))
DESCRIPTION
"An implementation is only required to support IPv4
addresses."
OBJECT natAddrBindRowStatus
SYNTAX RowStatus { active(1) }
WRITE-SYNTAX RowStatus { createAndGo(4), destroy(6) }
DESCRIPTION
"Support for createAndWait and notInService is
not required."
OBJECT natAddrPortBindGlobalAddrType
SYNTAX InetAddressType { unknown(0), ipv4(1), ipv6(2) }
DESCRIPTION
"An implementation is only required to support IPv4
addresses."
OBJECT natAddrPortBindGlobalAddr
SYNTAX InetAddress (SIZE(0|4|16))
DESCRIPTION
"An implementation is only required to support IPv4
addresses."
OBJECT natAddrPortBindRowStatus
SYNTAX RowStatus { active(1) }
WRITE-SYNTAX RowStatus { createAndGo(4), destroy(6) }
DESCRIPTION
"Support for createAndWait and notInService is
not required."
OBJECT natSessionPrivateAddrType
SYNTAX InetAddressType { unknown(0), ipv4(1), ipv6(2) }
DESCRIPTION
"An implementation is only required to support IPv4
addresses."
OBJECT natSessionPrivateSrcAddr
SYNTAX InetAddress (SIZE(0|4|16))
DESCRIPTION
"An implementation is only required to support IPv4
addresses."
OBJECT natSessionPrivateDstAddr
SYNTAX InetAddress (SIZE(0|4|16))
DESCRIPTION
"An implementation is only required to support IPv4
addresses."
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OBJECT natSessionPublicAddrType
SYNTAX InetAddressType { unknown(0), ipv4(1), ipv6(2) }
DESCRIPTION
"An implementation is only required to support IPv4
addresses."
OBJECT natSessionPublicSrcAddr
SYNTAX InetAddress (SIZE(0|4|16))
DESCRIPTION
"An implementation is only required to support IPv4
addresses."
OBJECT natSessionPublicDstAddr
SYNTAX InetAddress (SIZE(0|4|16))
DESCRIPTION
"An implementation is only required to support IPv4
addresses."
OBJECT natSessionRowStatus
SYNTAX RowStatus { active(1) }
WRITE-SYNTAX RowStatus { createAndGo(4), destroy(6) }
DESCRIPTION
"Support for createAndWait and notInService 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."
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 natConfRowStatus
SYNTAX RowStatus { active(1) }
MIN-ACCESS read-only
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DESCRIPTION
"Write access is not required, and active is the only
status that needs to be supported."
OBJECT natConfLocalAddrType
SYNTAX InetAddressType { unknown(0), ipv4(1), ipv6(2) }
DESCRIPTION
"Write access is not required. An implementation is only
required to support IPv4 addresses."
OBJECT natConfLocalAddrFrom
SYNTAX InetAddress (SIZE(0|4|16))
DESCRIPTION
"Write access is not required. An implementation is only
required to support IPv4 addresses."
OBJECT natConfLocalAddrTo
SYNTAX InetAddress (SIZE(0|4|16))
DESCRIPTION
"Write access is not required. An implementation is only
required to support IPv4 addresses."
OBJECT natConfGlobalAddrType
SYNTAX InetAddressType { unknown(0), ipv4(1), ipv6(2) }
DESCRIPTION
"Write access is not required. An implementation is only
required to support IPv4 addresses."
OBJECT natConfGlobalAddrFrom
SYNTAX InetAddress (SIZE(0|4|16))
DESCRIPTION
"Write access is not required. An implementation is only
required to support IPv4 addresses."
OBJECT natConfGlobalAddrTo
SYNTAX InetAddress (SIZE(0|4|16))
DESCRIPTION
"Write access is not required. An implementation is only
required to support IPv4 addresses."
OBJECT natConfAddrMapRowStatus
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 { unknown(0), ipv4(1), ipv6(2) }
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DESCRIPTION
"Write access is not required. An implementation is only
required to support IPv4 addresses."
OBJECT natAddrBindGlobalAddr
SYNTAX InetAddress (SIZE(0|4|16))
DESCRIPTION
"Write access is not required. An implementation is only
required to support IPv4 addresses."
OBJECT natAddrBindRowStatus
SYNTAX RowStatus { active(1) }
WRITE-SYNTAX RowStatus { createAndGo(4), destroy(6) }
DESCRIPTION
"Support for createAndWait and notInService is
not required."
OBJECT natAddrPortBindGlobalAddrType
SYNTAX InetAddressType { unknown(0), ipv4(1), ipv6(2) }
DESCRIPTION
"Write access is not required. An implementation is only
required to support IPv4 addresses."
OBJECT natAddrPortBindGlobalAddr
SYNTAX InetAddress (SIZE(0|4|16))
DESCRIPTION
"Write access is not required. An implementation is only
required to support IPv4 addresses."
OBJECT natAddrPortBindRowStatus
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 natSessionPrivateAddrType
SYNTAX InetAddressType { unknown(0), ipv4(1), ipv6(2) }
DESCRIPTION
"Write access is not required. An implementation is only
required to support IPv4 addresses."
OBJECT natSessionPrivateSrcAddr
SYNTAX InetAddress (SIZE(0|4|16))
DESCRIPTION
"Write access is not required. An implementation is only
required to support IPv4 addresses."
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OBJECT natSessionPrivateDstAddr
SYNTAX InetAddress (SIZE(0|4|16))
DESCRIPTION
"Write access is not required. An implementation is only
required to support IPv4 addresses."
OBJECT natSessionPublicAddrType
SYNTAX InetAddressType { unknown(0), ipv4(1), ipv6(2) }
DESCRIPTION
"Write access is not required. An implementation is only
required to support IPv4 addresses."
OBJECT natSessionPublicSrcAddr
SYNTAX InetAddress (SIZE(0|4|16))
DESCRIPTION
"Write access is not required. An implementation is only
required to support IPv4 addresses."
OBJECT natSessionPublicDstAddr
SYNTAX InetAddress (SIZE(0|4|16))
DESCRIPTION
"Write access is not required. An implementation is only
required to support IPv4 addresses."
OBJECT natSessionRowStatus
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."
::= { natMIBCompliances 2 }
END
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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.
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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, natConfAddrFallingThreshold,
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.
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
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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.
21 Oct 2003
o Rearranged notifications
o Added new TEXTUAL-CONVENTIONs.
o Incorporated other comments.
8. Acknowledgements
The authors of this memo would like to thank Randy Turner, Ashwini
S T, Kevin Luehrs, Sam Sankoorikal, Juergen Quittek and
Juergen Schoenwaelder for for their valuable feedback.
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10. Security Considerations
It is clear that this MIB can be potentially useful for
configuration. 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 bind and session information.
The NAT bind and session objects reveal the identity of private
hosts that are engaged in a session with external end nodes. A
curious outsider could monitor these two objects to assess the
number of private hosts being supported by the NAT device. Further,
a disgruntled former employee of an enterprise could use the nat
bind and session information to break into specific private hosts
by intercepting the existing sessions or originate new
sessions into the host. There are no objects which are sensitive in
their own right, such as passwords or monetary amounts.
It may be important to even control GET access to these objects and
possibly to even encrypt the values of these objects when sending
them 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).
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.
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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.
[RFC792] J. Postel, "Internet Control Message Protocol -
DARPA Internet Program Protocol Specification",
RFC 792, September 1981.
[RFC3489] J. Rosenberg, J. Weinberger, C. Huitema, and R. Mahy,
"STUN - Simple Traversal of User Datagram Protocol (UDP)
Through Network Address Translators (NATs)", RFC 3489,
March 2003.
[IF-MIB] McCloghrie, K. and F. Kastenholz, "The Interfaces Group
MIB using SMIv2", RFC 2863, June 2000.
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.
Rohit, Pai, Raghunarayan, Wang, Srisuresh [Page 56]
INTERNET-DRAFT NAT MIB October 2003
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
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 57]
INTERNET-DRAFT NAT MIB October 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 58]