IP Flow Information Export (IPFIX) Information Elements for Logging NAT Events
RFC 8158
| Document | Type |
RFC - Proposed Standard
(December 2017; No errata)
Was draft-ietf-behave-ipfix-nat-logging (individual)
|
|
|---|---|---|---|
| Last updated | 2017-12-20 | ||
| Replaces | draft-sivakumar-behave-nat-logging | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Reviews | |||
| Stream | WG state | WG Document | |
| Document shepherd | Spencer Dawkins | ||
| Shepherd write-up | Show (last changed 2016-10-10) | ||
| IESG | IESG state | RFC 8158 (Proposed Standard) | |
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Spencer Dawkins | ||
| Send notices to | "Spencer Dawkins" <spencerdawkins.ietf@gmail.com> | ||
| IANA | IANA review state | IANA OK - Actions Needed | |
| IANA action state | RFC-Ed-Ack | ||
Internet Engineering Task Force (IETF) S. Sivakumar
Request for Comments: 8158 R. Penno
Category: Standards Track Cisco Systems
ISSN: 2070-1721 December 2017
IP Flow Information Export (IPFIX) Information Elements
for Logging NAT Events
Abstract
Network operators require NAT devices to log events like creation and
deletion of translations and information about the resources that the
NAT device is managing. In many cases, the logs are essential to
identify an attacker or a host that was used to launch malicious
attacks and for various other purposes of accounting. Since there is
no standard way of logging this information, different NAT devices
use proprietary formats; hence, it is difficult to expect consistent
behavior. This lack of standardization makes it difficult to write
the Collector applications that would receive this data and process
it to present useful information. This document describes the
formats for logging NAT events.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 7841.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
https://www.rfc-editor.org/info/rfc8158.
Sivakumar & Penno Standards Track [Page 1]
RFC 8158 IPFIX IEs for NAT Logging December 2017
Copyright Notice
Copyright (c) 2017 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 4
1.2. Requirements Language . . . . . . . . . . . . . . . . . . 5
2. Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3. Deployment . . . . . . . . . . . . . . . . . . . . . . . . . 5
4. Event-Based Logging . . . . . . . . . . . . . . . . . . . . . 6
4.1. Logging Destination Information . . . . . . . . . . . . . 6
4.2. Information Elements . . . . . . . . . . . . . . . . . . 7
4.3. Definition of NAT Events . . . . . . . . . . . . . . . . 11
4.4. Quota Exceeded Event Types . . . . . . . . . . . . . . . 12
4.5. Threshold Reached Event Types . . . . . . . . . . . . . . 13
4.6. Templates for NAT Events . . . . . . . . . . . . . . . . 14
4.6.1. NAT44 Session Create and Delete Events . . . . . . . 14
4.6.2. NAT64 Session Create and Delete Events . . . . . . . 15
4.6.3. NAT44 BIB Create and Delete Events . . . . . . . . . 16
4.6.4. NAT64 BIB Create and Delete Events . . . . . . . . . 16
4.6.5. Addresses Exhausted Event . . . . . . . . . . . . . . 17
4.6.6. Ports Exhausted Event . . . . . . . . . . . . . . . . 17
4.6.7. Quota Exceeded Events . . . . . . . . . . . . . . . . 18
4.6.7.1. Maximum Session Entries Exceeded . . . . . . . . 18
4.6.7.2. Maximum BIB Entries Exceeded . . . . . . . . . . 18
4.6.7.3. Maximum Entries per User Exceeded . . . . . . . . 19
4.6.7.4. Maximum Active Hosts or Subscribers Exceeded . . 19
4.6.7.5. Maximum Fragments Pending Reassembly Exceeded . . 19
4.6.8. Threshold Reached Events . . . . . . . . . . . . . . 20
4.6.8.1. Address Pool High or Low Threshold Reached . . . 20
4.6.8.2. Address and Port Mapping High Threshold Reached . 21
4.6.8.3. Address and Port Mapping per User High Threshold
Reached . . . . . . . . . . . . . . . . . . . . . 21
4.6.8.4. Global Address Mapping High Threshold Reached . . 22
4.6.9. Address Binding Create and Delete Events . . . . . . 22
Sivakumar & Penno Standards Track [Page 2]
RFC 8158 IPFIX IEs for NAT Logging December 2017
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