Recommendations on Filtering of IPv4 Packets Containing IPv4 Options (RFC7126)
Original Publication Date: 2014-Feb-01
Included in the Prior Art Database: 2014-Feb-11
Internet Society Requests For Comment (RFCs)
F. Gont: AUTHOR [+3]
This document discusses the filtering of IPv4 packets based on the IPv4 options they contain. Since various protocols may use IPv4 options to some extent, dropping packets based on the options they contain may have implications on the proper functioning of such protocols. Therefore, this document attempts to discuss the operational and interoperability implications of such dropping. Additionally, it outlines what a network operator might do in typical enterprise or Service Provider environments. This document also draws and is partly derived from [RFC6274], which also received review from the operational community.
Internet Engineering Task Force (IETF) F. Gont Request for Comments: 7126 UTN-FRH / SI6 Networks BCP: 186 R. Atkinson Category: Best Current Practice Consultant ISSN: 2070-1721 C. Pignataro Cisco February 2014
Recommendations on Filtering of IPv4 Packets Containing IPv4 Options
This document provides advice on the filtering of IPv4 packets based on the IPv4 options they contain. Additionally, it discusses the operational and interoperability implications of dropping packets based on the IP options they contain.
Status of This Memo
This memo documents an Internet Best Current Practice.
This document is a product of the Internet Engineering Task Force (IETF). It has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on BCPs is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc7126.
Copyright (c) 2014 IETF Trust and the persons identified as the document authors. All rights reserved.
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Gont, et al. Best Current Practice [Page 1]
RFC 7126 Filtering of IP-Optioned Packets February 2014
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Terminology and Conventions Used in This Document . . . . 3
1.2. Operational Focus . . . . . . . . . . . . . . . . . . . . 4
2. IP Options . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. General Security Implications of IP Options . . . . . . ....