Implementation Advice for IPv6 Router Advertisement Guard (RA-Guard) (RFC7113)
Original Publication Date: 2014-Feb-01
Included in the Prior Art Database: 2014-Feb-12
Internet Society Requests For Comment (RFCs)
IPv6 Router Advertisement Guard (RA-Guard) is a mitigation technique for attack vectors based on ICMPv6 Router Advertisement [RFC4861] messages. [RFC6104] describes the problem statement of "Rogue IPv6 Router Advertisements", and [RFC6105] specifies the "IPv6 Router Advertisement Guard" functionality.
Internet Engineering Task Force (IETF) F. Gont Request for Comments: 7113 Huawei Technologies Updates: 6105 February 2014 Category: Informational ISSN: 2070-1721
Implementation Advice for IPv6 Router Advertisement Guard (RA-Guard)
The IPv6 Router Advertisement Guard (RA-Guard) mechanism is commonly employed to mitigate attack vectors based on forged ICMPv6 Router Advertisement messages. Many existing IPv6 deployments rely on RA-Guard as the first line of defense against the aforementioned attack vectors. However, some implementations of RA-Guard have been found to be prone to circumvention by employing IPv6 Extension Headers. This document describes the evasion techniques that affect the aforementioned implementations and formally updates RFC 6105, such that the aforementioned RA-Guard evasion vectors are eliminated.
Status of This Memo
This document is not an Internet Standards Track specification; it is published for informational purposes.
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). Not all documents approved by the IESG are a candidate for any level of Internet Standard; see 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/rfc7113.
Gont Informational [Page 1]
RFC 7113 RA-Guard Implementation Advice February 2014
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Evasion Techniques for Some RA-Guard Implementations . . . . . 3 2.1. Attack Vector Based on IPv6 Extension Headers . . ....